CN112550421B

CN112550421B - Baby stroller capable of automatically switching wheel orientation and brake locking state after reversing

Info

Publication number: CN112550421B
Application number: CN202011570577.8A
Authority: CN
Inventors: 李永林; 张小辉
Original assignee: Taicang Xinqile Baby's Supplies Co ltd
Current assignee: Taicang Xinqile Baby's Supplies Co ltd
Priority date: 2020-12-26
Filing date: 2020-12-26
Publication date: 2025-07-18
Anticipated expiration: 2040-12-26
Also published as: CN112550421A

Abstract

The invention discloses a baby stroller that automatically switches wheel orientation and brake locking states after reversing, and the key point is that the front and rear frame assembly connecting cross bars and frame joints are all provided with orientation and brake locking mechanisms composed of a traction wheel, an orientation reset compression spring, an orientation pin, an orientation traction wire, a brake transmission member reset compression spring, a brake transmission member, a brake handle traction wire, a brake handle reset torsion spring, a brake handle, a brake handle positioning member, a brake handle positioning compression spring, a brake handle positioning pin, a brake handle reset member, a brake handle reset member compression spring, a brake handle reset pin, etc., a brake disc is provided on the wheel, an orientation pin slot, a brake member, a brake reset member, a brake reset member reset compression spring, a brake member compression spring, etc. are provided on the wheel fork, and a traction wheel transmission mechanism is respectively provided at the left and right hinges of the push rod assembly and the frame assembly. The invention simplifies the operation steps of wheel orientation and brake lock switching, making it more convenient and satisfactory for consumers to use, and has a simple structure, concise circuits, reliable performance, and low cost.

Description

Baby stroller capable of automatically switching wheel orientation and brake locking state after reversing

Technical Field

The invention belongs to the field of baby strollers, and particularly relates to a baby stroller capable of automatically switching wheel orientation and braking locking state after reversing.

Background

Today, baby strollers that can be pushed in both directions are popular in the market, and users can choose whether to face the forward direction of the baby or the user himself when pushing according to the needs. In order to meet the requirements of bidirectional straight pushing, turning pushing and temporary stopping, the existing bidirectional pushing baby stroller is usually provided with wheel orientation and brake locking functions. However, the existing bidirectional pushing baby strollers have the following problems:

1. The orientation mechanism and the brake locking mechanism are independent and controlled by the traction ropes corresponding to the orientation mechanism and the brake locking mechanism, so that when the orientation and the brake of one pair of wheels are required to be released, the orientation mechanism and the brake locking mechanism are required to be unlocked respectively, the operation steps are complex, and the circuit is complex.

2. The orientation mechanisms on the front side and the rear side do not automatically switch states according to the reversing of the push rod, so that when the push rod is reversed, the wheels on the front side of the pushing direction are also required to be manually released from orientation, and the wheels on the front side of the pushing direction are also required to be locked in orientation.

3. The brake locking mechanisms on the front side and the rear side can not automatically release the brake locking state of the wheels positioned on the front side in the pushing direction according to the reversing of the push rod, so that when the push rod is reversed, a user often forgets to release the brake locking state of the wheels positioned on the front side in the pushing direction in advance, and the baby stroller cannot be pushed.

4. The front and rear directional mechanisms and the brake locking mechanism do not have linkage functions, and the front and rear wheels cannot be alternately locked and unlocked, so that when the front and rear directional mechanisms and the brake locking mechanism need to be pushed forward, the direction and the brake of the front wheels are required to be released first, and then the direction and the brake of the rear wheels are locked, so that the operation complexity is further increased.

5. The braking action of the wheel brake assembly is a one-section travel, so when the brake piece cannot be embedded into the clamping groove of the brake disc for the first time, the brake piece cannot be driven by the brake transmission piece and can also interfere, the effect of braking can be influenced if the weight of the wheel brake assembly is light in the long term, and the brake assembly can be damaged if the weight of the wheel brake assembly is heavy.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a baby stroller capable of automatically switching the wheel orientation and the brake locking state after reversing, so as to solve the problems of complex structure of an orientation and brake locking mechanism, complex operation of orientation and brake locking switching and the like of the existing bidirectional pushing baby stroller.

In order to solve the technical problems and achieve the technical effects, the invention is realized by the following technical scheme:

the baby stroller capable of automatically switching the wheel orientation and the brake locking state after reversing comprises a frame assembly, wherein the upper part of the frame assembly is hinged with a push rod assembly capable of reversing front and back, the bottoms of a left frame joint and a right frame joint at the front end and the rear end of the frame assembly are respectively provided with a wheel fork which rotates in a universal way, and each wheel fork is respectively provided with a wheel;

The inside of each frame joint is respectively provided with a horizontally telescopic directional pin through a corresponding directional reset pressure spring, the left and right directional pins positioned at the front and the left and right directional pins positioned at the back are respectively in transmission connection with a corresponding traction wheel through a left and right directional traction wire, the two traction wheels are respectively rotatably arranged on connecting cross bars at the front end and the rear end of the frame assembly, the traction wheels control the left and right directional traction wires in the same direction to simultaneously carry out traction or release actions through forward and reverse rotation of the traction wheels, when the directional traction wires carry out traction actions, the directional pins connected with the directional pins retract into the corresponding frame joints under the traction action of the directional traction wires, and when the directional traction wires carry out release actions, the directional pins connected with the directional pins extend out of the outer side surfaces of the lower parts of the corresponding frame joints under the action of the corresponding directional reset pressure springs;

The inside of each frame joint is respectively provided with a brake transmission piece which can vertically stretch out and draw back through a corresponding brake transmission piece reset pressure spring, a corresponding brake handle traction wire is connected between the left and right brake transmission pieces positioned in front and between the left and right brake transmission pieces positioned behind through a plurality of guide wheels, the front and rear brake handle traction wires are respectively in transmission connection with a corresponding brake handle, the two brake handles are respectively rotatably and resettable through corresponding brake handle reset torsion springs and are arranged on connecting cross bars at the front and rear ends of the frame assembly, and the two brake handle traction wires respectively pass through holes in the lower parts of the brake handles; when the brake crank is stressed, the brake crank drives the brake crank reset torsion spring to twist tightly and rotate downwards to press the brake crank traction wire, when the brake crank is not stressed, the brake crank is lifted upwards under the action of the elasticity of the brake crank reset torsion spring and does not press the brake crank traction wire, the brake crank controls the traction wire of the brake crank in the same direction to perform traction or release action through lifting or pressing down of the brake crank, when the traction wire of the brake crank performs traction action, the left and right brake transmission pieces connected with the brake transmission pieces simultaneously extend out of the lower side surfaces of the corresponding frame joints under the traction of the traction wire of the brake crank, and when the traction wire of the brake crank performs release action, the left and right brake transmission pieces connected with the brake transmission pieces simultaneously retract into the corresponding frame joints under the action of the reset elasticity of the corresponding brake transmission pieces;

the two brake handle positioning pieces are fixedly connected with connecting cross bars at the front end and the rear end of the frame assembly respectively, a brake handle positioning pin capable of horizontally stretching is arranged in each brake handle positioning piece through a corresponding brake handle positioning pressure spring, the front end and the rear end of each brake handle positioning pin are respectively in transmission connection with the traction wheel in the same direction through a corresponding brake handle positioning traction wire, the traction wheel controls the brake handle positioning traction wire in the same direction to perform traction or release actions through forward and reverse rotation of the traction wheel, and when the brake handle positioning traction wire performs traction actions, the brake handle positioning pin connected with the brake handle positioning piece is retracted into the corresponding brake handle positioning piece, when the brake handle positioning wire performs release actions, the brake handle positioning pin connected with the brake handle positioning pin is extended out of the corresponding brake handle positioning piece through the corresponding brake handle positioning hole, and the brake handle positioning pin is extended out of the corresponding hole, and the brake handle positioning pin is extended out of the hole is positioned at the side surface of the brake handle positioning piece, and the brake handle positioning pin is extended out of the brake hole is simultaneously;

The two brake handle reset pieces are respectively and rotatably arranged on connecting cross bars at the front end and the rear end of the frame assembly, the two brake handle reset pieces respectively and synchronously rotate along with the corresponding brake handles through brake handle reset torsion springs, the top of each brake handle reset piece is provided with a convex brake handle reset piece contact part which extends upwards out of the upper surface of the corresponding brake handle, a brake handle reset piece pressure spring is respectively connected between each brake handle reset piece and the corresponding brake handle, meanwhile, a brake handle reset pin capable of horizontally moving is arranged in each brake handle positioning hole, and the brake handle positioning pin is contacted with one end of the brake handle reset pin and pushes the other end of the brake handle positioning hole out of the brake handle positioning hole under the condition that the brake handle positioning pin extends into the inner side hole of the brake handle positioning hole;

The inside surface of each wheel fork top is provided with a directional pin clamping groove used for being in plug-in fit with the directional pin, when the directional pin extends out of the outside surface of the lower part of the frame joint to which the directional pin belongs, the directional pin is inserted into the corresponding directional pin clamping groove, the inside of each wheel is provided with a brake disc coaxial with the wheel, the brake disc is a gear-shaped disc, a groove on the gear-shaped disc forms a brake piece clamping groove, the inside surface of each wheel fork inner support is provided with a brake piece sliding groove, a brake piece sliding groove capable of sliding up and down is arranged in the brake piece sliding groove, the outside surface of each wheel fork inner support is provided with a brake reset piece sliding groove, a brake reset piece sliding up and down is arranged in the brake reset piece sliding groove, two brake reset piece reset compression springs are arranged between the bottom of the brake reset piece sliding groove and the bottom of the brake reset piece, the bottom of the brake reset piece is provided with a brake piece mounting groove, the lower side surface of the brake piece compression spring mounting groove is provided with a brake piece sliding up and down, the brake pin is not in contact with the brake disc, the brake spring is in a state of being in a sliding position between the top of the brake pad and the compression spring, the brake spring is in a state of being in a sliding up and down sliding position of the brake pin is released from the top of the brake pad mounting groove, the top of the brake resetting piece extends upwards out of a top notch of the brake resetting piece sliding groove under the action of the elastic force of the brake resetting piece resetting pressure spring so as to be in contact fit with the brake transmission piece, meanwhile, the brake piece is in a downward spring-open state in the brake piece pressure spring mounting groove under the action of the elastic force of the brake piece pressure spring, and the brake piece sliding pin is positioned at the bottommost end of the waist-shaped hole; when the brake is in a state to be braked, the bottom of the brake piece moves to the middle position and is abutted against the convex blocks on the brake disc, at the moment, the brake reset piece moves to the lower end of the brake reset piece sliding groove under the pressure of the brake transmission piece, the brake reset piece reset pressure spring is in a compressed state, meanwhile, the extrusion brake piece pressure spring is in a compressed state under the pressure of the brake reset piece, and the brake piece sliding pin is at the topmost end of the waist-shaped hole;

A first traction wheel transmission mechanism is arranged at the hinge joint of the push rod assembly and the left side of the frame assembly, a second traction wheel transmission mechanism is arranged at the hinge joint of the push rod assembly and the right side of the frame assembly, the first traction wheel transmission mechanism and the second traction wheel transmission mechanism respectively and correspondingly control the rotation of one traction wheel in the front-back direction, and the first traction wheel transmission mechanism and the second traction wheel transmission mechanism alternately drive the corresponding traction wheels to rotate along with the reversing of the push rod assembly;

the first traction wheel transmission mechanism comprises a first transmission mechanism shell, a first transmission slide block spring, a first transmission slide block, a first eccentric part and a first traction rope, wherein the first transmission mechanism shell is arranged on the push rod assembly and hinged with the left side of the frame assembly, the first transmission mechanism shell is fixed relative to the frame assembly, and the first transmission slide block is arranged inside the first transmission mechanism shell in a telescopic way through the first transmission slide block spring; one end of the first traction rope stretches into the first transmission mechanism shell and then is connected with the first transmission sliding block, the other end of the first traction rope is connected with one corresponding traction wheel through the inside of a pipeline of the frame assembly, when the first transmission sliding block spring is in a loose state, one end of the first transmission sliding block stretches out of the first transmission mechanism shell outwards so as to facilitate contact and fit of the first eccentric part, when the first transmission sliding block spring is in a compressed state, one end of the first transmission sliding block stretches inwards into the first transmission mechanism shell and is used for driving the corresponding traction wheel to rotate, the first transmission sliding block controls the first traction rope to do traction or release action through the expansion and contraction in the first transmission mechanism shell, the first traction rope controls the corresponding traction wheel to rotate forwards and backwards through the traction or release of the first traction rope, the first eccentric part is arranged at the bottom end of the push rod assembly on the left side and rotates along with the push rod assembly, when the push rod assembly is in a compressed state, the first eccentric part stretches out of the push rod assembly along with the forward and backward rotation of the push rod assembly, the first transmission slide block is pressed into the first transmission mechanism shell, the first transmission slide block spring is in a compression state, the first traction rope is in a traction state so as to drive the corresponding traction wheel to rotate positively, when the push rod assembly is reversed to the front, the smooth part on the first eccentric part is contacted with the extending end of the first transmission slide block along with the rotation of the push rod assembly, the first transmission slide block spring is in a relaxation state, the extending end of the first transmission slide block is pushed out of the first transmission mechanism shell, and the first traction rope is in a release state so as to drive the corresponding traction wheel to rotate reversely;

The second traction wheel transmission mechanism comprises a second transmission mechanism shell, a second transmission sliding block spring, a second transmission sliding block, a second eccentric part and a second traction rope, wherein the second transmission mechanism shell is arranged on the left side of the push rod assembly and hinged with the frame assembly, the second transmission mechanism shell is fixed relative to the frame assembly, the second transmission sliding block is arranged inside the second transmission mechanism shell in a telescopic way through the second transmission sliding block spring, one end of the second traction rope stretches into the second transmission mechanism shell and then is connected with the second transmission sliding block, the other end of the second traction rope is connected with one corresponding traction wheel through the inside of a pipeline of the frame assembly, when the second transmission sliding block spring is in a loose state, one end of the second transmission sliding block stretches out of the second transmission mechanism shell so as to facilitate contact fit of the second eccentric part, when the second transmission sliding block spring is in a compressed state, one end of the second transmission sliding block stretches inwards into the second transmission mechanism shell, one end of the second transmission sliding block stretches out of the second transmission mechanism shell after stretching into the second transmission sliding block shell, the other end of the second traction rope stretches out of the second transmission sliding block spring, and the push rod assembly is controlled by the second eccentric part of the push rod assembly or the push rod assembly is pulled out of the push rod assembly, the push rod assembly is pulled out of the push rod assembly along with the push rod assembly, the push rod assembly is pulled out of the push rod assembly or the push rod assembly is pulled out of the second eccentric part, and rotates along with the push rod assembly, the push rod assembly is controlled to rotate, and the one end of the push rod assembly is stretched out outwards, and the second transmission slide block is pressed into the second transmission mechanism shell, the second transmission slide block spring is in a compression state, the second traction rope is in a traction state and drives the corresponding traction wheel to rotate positively, when the push rod assembly is reversed to the rear, the smooth part on the second eccentric part is contacted with the extending end of the second transmission slide block along with the rotation of the push rod assembly, the second transmission slide block spring is in a relaxation state, the extending end of the second transmission slide block is pushed out of the second transmission mechanism shell, and the second traction rope is in a release state and drives the corresponding traction wheel to rotate reversely.

Further, the frame assembly is a foldable frame assembly.

Further, the wheel fork is rotatably arranged at the bottom of the corresponding frame joint through a wheel fork steering shaft.

Further, the top end of the brake transmission member extends out of the upper surface of the frame joint, so that interference to the travel of the brake transmission member is avoided.

Further, an upper cover plate and a lower cover plate are arranged on the frame joint and the connecting cross rod in the same direction.

Further, the upper surface of every brake lever setting element all is provided with a traction cable tensioning regulating block, and every traction cable's the other end all passes through the correspondence traction cable tensioning regulating block with the transmission connection of tensioning is realized to the traction wheel that corresponds.

Further, the traction wheel is positioned in the middle of the frame connecting cross rod.

Further, one end of the brake crank reset pin, which is in contact with the brake crank reset piece contact part, is in a semicircle shape, the width of the lower half part of the brake crank reset piece contact part is larger than that of the upper half part of the brake crank reset piece contact part, and the width of the lower half part of the brake crank reset piece contact part is gradually increased from top to bottom, so that the brake crank reset piece contact part can smoothly push the brake crank reset pin into the brake crank positioning hole.

Further, an anti-skid groove for increasing friction force is arranged on the upper surface of the brake crank.

Further, a traction rope caulking groove, a left directional traction wire caulking groove, a right directional traction wire caulking groove and a brake lever positioning traction wire caulking groove are circumferentially formed in the circumferential surface of the traction wheel, the traction rope caulking groove, the left directional traction wire caulking groove, the right directional traction wire caulking groove and the brake lever positioning traction wire caulking groove are respectively formed in the tail end of the traction rope caulking groove, the left directional traction wire fixing clamping groove, the right directional traction wire fixing clamping groove and the brake lever positioning traction wire fixing clamping groove, the traction rope passes through the traction rope caulking groove and is fixedly connected with the traction rope fixing clamping groove, the left directional traction wire passes through the left directional traction wire caulking groove and is fixedly connected with the left directional traction wire fixing clamping groove, the right directional traction wire passes through the right directional traction wire caulking groove and is fixedly connected with the right directional traction wire fixing clamping groove, and the brake lever positioning wire passes through the traction wire fixing clamping groove and is fixedly connected with the traction wire fixing clamping groove.

Further, the traction cable is fixedly connected with the traction cable fixing clamping groove on the traction wheel after being led in from the frame joint on the right side, and the brake crank resetting piece are both positioned on the right side of the traction wheel.

Further, the traction cable fixing clamping groove is positioned on the left side of the top of the traction wheel, the left directional traction cable fixing clamping groove is positioned on the right side of the top of the traction wheel, the right directional traction cable fixing clamping groove is positioned on the left side of the bottom of the traction wheel, and the brake crank positioning traction cable fixing clamping groove is positioned on the right side of the bottom of the traction wheel.

Further, the first traction wheel transmission mechanism is arranged at the position where the push rod assembly is hinged to the left side of the frame assembly, the first traction rope is fixedly connected with the traction rope fixing clamping groove on the traction wheel located in front through the inside of the frame assembly on the left side, the brake lever and the brake lever resetting piece located in front are both close to the introducing direction of the first traction rope, the second traction wheel transmission mechanism is arranged at the position where the push rod assembly is hinged to the right side of the frame assembly, the first traction rope is fixedly connected with the traction rope fixing clamping groove of the traction wheel located behind through the inside of the frame assembly on the right side, and the brake lever resetting piece located behind are both close to the introducing direction of the second traction rope.

Further, the brake resetting piece is inserted into the brake resetting piece sliding groove through the limiting sliding grooves on two sides, so that the brake resetting piece is ensured to always keep sliding up and down in the brake resetting piece sliding groove, and the brake resetting piece sliding groove is prevented from being outwards popped up.

Further, the brake piece comprises a brake piece main body part, a brake piece connecting part and a brake piece working part, wherein the brake piece connecting part is connected with the top of the brake piece main body part, a brake piece sliding pin through hole is formed in the brake piece connecting part, the brake piece working part is fixed on the outer side face of the brake piece main body part, when the brake piece is assembled, the brake piece main body part is positioned on the inner side of a brake piece sliding groove (56), the brake piece working part is positioned on the outer side of the brake piece sliding groove (56) and is used for being in insertion fit with the brake piece clamping groove, the brake piece connecting part is positioned in a brake piece pressure spring mounting groove, a brake piece sliding pin in the waist-shaped hole penetrates through the brake piece sliding pin through hole, and the top of the brake piece connecting part is contacted with the bottom end of the brake piece pressure spring.

Further, the protruding portion of the first eccentric member and the protruding portion of the second eccentric member protrude from the rounded outer periphery of the respective bodies, respectively, and the protruding portion of the first eccentric member is located at the front lower portion of the body thereof, and the protruding portion of the second eccentric member is located at the rear upper portion of the body thereof.

Further, the end faces of the extending end of the first transmission sliding block and the extending end of the second transmission sliding block are respectively provided with a first contact column and a second contact column which are convenient for pushing the first eccentric part and the second eccentric part.

The beneficial effects of the invention are as follows:

1. The invention not only realizes that the directional and braking locking mechanisms on the two groups of wheels in the front-back direction automatically and alternately work after the push rod assembly commutates, but also realizes that one main traction rope is adopted to simultaneously control one group of directional and braking locking mechanisms, and also realizes that one brake handle is adopted to simultaneously control the braking of one pair of wheels, thereby realizing one-step double-brake. When the push rod assembly rotates to the rear, the two front wheels can simultaneously and automatically release the orientation and the brake locking, the two rear wheels can simultaneously and automatically open the orientation locking and the brake to be locked, the two rear wheels at the stage can only rotate in the front-rear direction, if the brake handle at the rear side is continuously pressed down, the two rear wheels are simultaneously and actively switched to the brake locking by the brake to be locked, the two rear wheels at the stage cannot rotate in the direction and can not rotate, the brake handle at the rear side can be locked until the push rod assembly rotates to the front or the brake handle reset piece is manually started to lock and unlock the brake handle, otherwise, when the lever assembly rotates to the front, the states of the front and rear wheels are opposite to those of the brake handle before reversing of the push rod assembly.

2. The invention can realize that the brake crank in the opposite direction can not be locked when the push rod assembly is reversed to one direction, thereby preventing the people in front of the push rod assembly from stepping by mistake and avoiding the push obstacle.

3. According to the invention, the two-stage locking action of the brake assembly is realized, when the brake piece is aligned with the convex block of the brake disc and is not directly aligned with the brake piece clamping groove, the brake transmission piece can be downwards extruded within the compressible range of the brake piece pressure spring so as to prevent interference to the action of the brake transmission piece, and when the brake piece is aligned with the brake piece clamping groove of the brake disc again, the brake piece can be embedded into the brake piece clamping groove of the brake disc under the elastic force of the brake piece pressure spring, so that the braking of the wheel is realized in two stages, and the damage of parts caused by the fact that the brake piece cannot be embedded into the brake piece clamping groove of the brake disc for the first time is avoided.

4. The invention has the advantages of relatively simple structure, concise circuit, reliable performance, high safety and lower manufacturing cost, and mainly simplifies the operation steps of wheel orientation and brake locking switching, and the front and back switching is finished completely, so that the invention is very humanized, and the use of consumers is more convenient and pleasant.

The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings. Specific embodiments of the present invention are given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

FIG. 1 is a left side perspective view of the present invention with the push rod assembly displaced to the rear;

FIG. 2 is a right side perspective view of the present invention with the push rod assembly replaced in the forward direction;

FIG. 3 is a left side perspective view of the present invention with the push rod assembly displaced to the front;

FIG. 4 is a right side perspective view of the present invention with the push rod assembly replaced in the forward direction;

FIG. 5 is a schematic illustration of the reversing of the push rod assembly of the present invention;

figure 6 is a perspective view of one set of wheel alignment and brake locking mechanisms of the present invention;

FIG. 7 is a top view of one set of wheel alignment and brake locking mechanisms of the present invention;

Figure 8 is a front semi-sectional view of the directional lock assembly of the wheel directional and brake locking mechanism of the present invention;

FIGURE 9 is a front semi-sectional view of the brake lock assembly and the brake assembly of the wheel alignment and brake lock mechanism of the present invention;

FIGURE 10 is an enlarged front elevational view in section of a brake locking assembly of the wheel alignment and brake locking mechanism of the present invention;

FIG. 11 is an enlarged cross-sectional top surface view of the brake lock assembly of the wheel alignment and brake lock mechanism of the present invention;

FIGURE 12 is a side semi-sectional view of a brake locking assembly of the wheel alignment and brake locking mechanism of the present invention;

figure 13 is a schematic view of the wheel and brake mechanism of the present invention assembled with the springs removed;

figure 14 is a side view of the wheel and brake mechanism of the present invention;

Figure 15 is a front view of the wheel and brake mechanism of the present invention;

FIG. 16 is a cross-sectional view of the brake mechanism of the present invention;

FIG. 17 is a perspective view of a brake member of the brake mechanism of the present invention;

fig. 18 is a perspective view of a traction wheel of the present invention;

FIG. 19 is a diagram showing the assembled relationship of the traction wheel and the directional traction wire and traction cable of the present invention;

FIG. 20 is a diagram showing the relationship between the traction wheel and the brake lever positioning traction wire of the present invention;

FIG. 21 is a schematic illustration of the connection between the traction wheel drive mechanism on the left and right sides and the front and rear sets of wheel orientation and brake locking mechanisms in accordance with the present invention;

FIG. 22 is a schematic view of the first traction wheel drive mechanism of the present invention with the push rod assembly shifted to the rear;

FIG. 23 is a schematic view of the first traction wheel drive mechanism of the present invention with the push rod assembly shifted to the front;

FIG. 24 is a schematic view of a second traction wheel drive mechanism of the push rod assembly of the present invention when switched to the rear;

Fig. 25 is a schematic structural view of the second traction wheel transmission mechanism when the push rod assembly is switched to the front.

Detailed Description

The application will be described in detail below with reference to the drawings in combination with embodiments. The description herein is to be taken in a providing further understanding of the application and is made in the accompanying drawings, which illustrate and explain the application by way of example and not of limitation.

Referring to fig. 1-5, a stroller capable of automatically switching the wheel orientation and the brake locking state after reversing comprises a frame assembly 1, wherein a push rod assembly 2 capable of reversing front and back is hinged to the upper part of the frame assembly 1, the bottoms of a left frame joint 3 and a right frame joint 3 at the front end and the rear end of the frame assembly 1 are respectively provided with a wheel fork 4 which rotates in a universal way, and each wheel fork 4 is respectively provided with a wheel 5;

Referring to fig. 6-8, a horizontally retractable orientation pin 8 is respectively disposed in each frame joint 3 through a corresponding orientation return pressure spring 7, the left and right orientation pins 8 disposed in front and the left and right orientation pins 8 disposed in rear are respectively in transmission connection with a corresponding traction wheel 10 through the left and right orientation traction wires 9, the two traction wheels 10 are respectively rotatably disposed on the connecting cross bars 6 at the front and rear ends of the frame assembly 1, the traction wheels 10 control the left and right orientation traction wires 9 in the same direction to simultaneously perform traction or release actions through forward and reverse rotation of the traction wheels, when the orientation traction wires 9 perform traction actions, the orientation pins 8 connected with the orientation pins retract into the corresponding frame joints 3 under the traction of the orientation traction wires 9, and when the orientation traction wires 9 perform release actions, the orientation pins 8 connected with the orientation pins extend out of the outer sides of the corresponding frame joints 3 under the action of the corresponding orientation return pressure springs 7;

Referring to fig. 6-7 and 9-12, a vertically telescopic brake transmission member 12 is arranged in each frame joint 3 through a corresponding brake transmission member reset pressure spring 11, a corresponding brake handle traction wire 14 is connected between the left and right brake transmission members 12 positioned in the front and between the left and right brake transmission members 12 positioned in the rear through a plurality of guide wheels 13, the front and rear brake handle traction wires 14 are respectively in transmission connection with a corresponding brake handle 15, the two brake handles 15 are respectively rotatably and resettable through corresponding brake handle reset torsion springs 16 on connecting cross bars 6 arranged at the front and rear ends of the frame assembly 1, and the two brake handle traction wires 14 respectively pass through holes in the lower parts of the brake handles 15 respectively; when the brake lever 15 is stressed, the brake lever 15 drives the brake lever reset torsion spring 16 to twist tightly and rotate downwards to press the brake lever traction wire 14, when the brake lever 15 is not stressed, the brake lever 15 is lifted upwards under the action of the elasticity of the brake lever reset torsion spring 16 and does not press the brake lever traction wire 14, the brake lever 15 controls the traction wire 14 in the same direction to perform traction or release action through lifting or pressing down of the brake lever 15, when the brake lever traction wire 14 performs traction action, the left and right brake transmission members 12 connected with the brake lever traction wire 14 simultaneously extend out of the lower side surfaces of the corresponding frame joints 3 under the traction of the brake lever traction wire 14, and when the brake lever traction wire 14 performs release action, the left and right brake transmission members 12 connected with the brake lever traction wire are simultaneously retracted into the corresponding frame joints 3 under the action of the elasticity of the corresponding brake transmission member reset compression spring 11;

The traction wheel 10 and the brake lever 15 which are positioned at the front and the traction wheel 10 and the brake lever 15 which are positioned at the rear are respectively provided with a brake lever positioning piece 17, the two brake lever positioning pieces 17 are respectively fixedly connected with the connecting cross bars 6 at the front end and the rear end of the frame component 1, the inside of each brake lever positioning piece 17 is respectively provided with a brake lever positioning pin 19 which can horizontally stretch out and draw back through a corresponding brake lever positioning pressure spring 18, the front end and the rear end of each brake lever positioning pin 19 are respectively in transmission connection with the traction wheel 10 in the same direction through a corresponding brake lever positioning wire 20, the traction wheel 10 controls the traction or release action of the brake lever positioning wire 20 in the same direction through the forward and reverse rotation of the brake lever positioning wire 20, and when the brake lever positioning wire 20 performs traction action, the brake lever positioning pin 19 connected with the brake lever positioning piece is pulled into the corresponding brake lever positioning piece 17, when the brake lever positioning wire 20 is pulled into the corresponding brake lever positioning piece 17, the left end of the brake lever positioning pin 19 is pulled out of the corresponding brake lever positioning piece 21 is pulled out, and the left end of the brake lever positioning piece 21 is simultaneously positioned at the side surface of the corresponding brake lever positioning piece 21, and the left end of the brake lever positioning piece 19 is stretched out of the corresponding brake lever positioning piece 21 is stretched out of the corresponding positioning piece 21;

A corresponding brake handle reset piece 23 is respectively stuck below the front brake handle 15 and the rear brake handle 15, the two brake handle reset pieces 23 are respectively and rotatably arranged on the connecting cross bars 6 at the front end and the rear end of the frame assembly 1, the two brake handle reset pieces 23 synchronously rotate along with the corresponding brake handle 15 respectively through the brake handle reset torsion springs 16, and a convex brake handle reset piece contact part 25 is arranged at the top of each brake handle reset piece 23 and extends upwards out of the upper surface of the corresponding brake handle 15; A brake handle reset member pressure spring 24 is connected between each brake handle reset member 23 and the corresponding brake handle 15, a brake handle reset pin 26 capable of horizontally moving is arranged in a brake handle positioning hole 22 of each brake handle 15, when the brake handle positioning pin 19 stretches into an inner side hole of the brake handle positioning hole 22, the brake handle positioning pin 19 contacts one end of the brake handle reset pin 26 and pushes the other end of the brake handle positioning pin out of an outer side hole of the brake handle positioning hole 22, when the brake handle reset member 23 is in an initial state relative to the brake handle 15 at this time, the brake handle reset member 23 is opened downwards under the action of the spring force of the brake handle reset member pressure spring 24, and a brake handle reset member contact part 25 of the brake handle reset member 23 is not forced to the brake handle reset pin 26, when the brake handle reset member 23 is in a clamping state relative to the brake handle 15 at this time, the brake handle reset member 23 compresses the brake handle reset member spring 24 and lifts the other end of the brake handle reset member 26 upwards, and the brake handle reset member contact part 25 returns to the brake handle reset member contact part 25 to the brake handle positioning pin 26 at this time, and the brake handle reset member contact part 25 returns to the brake handle positioning pin contact part 17 at this time, and the brake handle reset part 19 is pushed back to the brake handle positioning hole 22, the brake crank 15 is lifted upwards under the elastic force of the brake crank reset torsion spring 16 and does not press the brake crank traction wire 14;

Referring to fig. 6-9 and 12-16, an inner side surface of a top portion of each fork 4 is provided with an orientation pin locking groove 27 for being in insertion fit with the orientation pin 8, and when the orientation pin 8 protrudes from an outer side surface of a lower portion of the frame joint 3 to which the orientation pin 8 belongs, the orientation pin 8 is inserted into the corresponding orientation pin locking groove 27; the inner side of each wheel 5 is provided with a brake disc 28 coaxial with the wheel 5, the brake disc 28 is a gear-shaped disc, grooves on the gear-shaped disc form a brake clamping groove, the inner surface of each wheel fork 4 inner side support is provided with a brake sliding groove 56, the brake sliding groove 56 is internally provided with a brake piece 29 capable of sliding up and down, the outer surface of each wheel fork 4 inner side support is provided with a brake resetting piece sliding groove 30, the brake resetting piece sliding groove 30 is internally provided with a brake resetting piece 31 capable of sliding up and down, two brake resetting piece resetting pieces 32 are arranged between the bottom of the brake resetting piece 31 and the bottom of the brake resetting piece sliding groove 30, the bottom of the brake resetting piece 31 is provided with a brake piece pressure spring mounting groove 33, the side surface of the lower part of the brake piece pressure spring mounting groove 33 is provided with a waist-shaped hole 34, the waist-shaped hole 34 is internally provided with a brake piece sliding pin 35 capable of sliding up and down, the upper part of the brake piece 29 is positioned in the brake piece sliding up and down, when the brake piece sliding up and down is connected with the brake piece sliding pin 35 through the brake pin 33, the top of the brake pressing spring is in a state of being fixed with the brake pin 29, the bottom of the brake member 29 moves to the highest position and is not contacted with the brake disc 28, at this time, the bottom of the brake member 29 moves to the middle position and is in contact with the bump on the brake disc 28, at this time, the top of the brake member 31 extends upwards out of the top notch of the brake member sliding groove 30 under the action of the elastic force of the brake member reset pressure spring 32 so as to be in contact with the brake transmission member 12, at the same time, the brake member 29 is in a downward spring-open state in the brake member pressure spring 36 elastic force acting on the brake member pressure spring mounting groove 33, and the brake member sliding pin 35 is positioned at the bottommost end of the waist-shaped hole 34, at this time, when in a state to be braked, the bottom of the brake member 29 moves to the middle position and is in contact with the bump on the brake disc 28, at this time, the brake member 31 moves to the lower end of the brake member sliding groove 30 under the pressure of the brake transmission member 12, at this time, the brake member reset pressure spring 36 is in a compression state under the pressure of the brake member 31, at this time, the brake member is in a compression state under the brake member spring force of the brake member 36, the brake member sliding pin 35 is in a compression state under the brake member 31, and the brake member sliding pin is in the compression of the brake member sliding groove 30, at this time, the brake member sliding pin 35 is in the compression, the brake member is in the compression state under the brake member sliding groove 30, the compression, the brake member is in the compression, and the brake member is in the compression, the compression of the brake member compression, and the brake member compression spring is in the compression, and the brake member compression is compressed and is in the compression, and the brake member compression is compression. And the brake slide pin 35 is positioned at the bottommost end of the waist-shaped hole 34;

Referring to fig. 21, a first traction wheel transmission mechanism 37a is disposed at a hinge joint of the push rod assembly 2 and the left side of the frame assembly 1, a second traction wheel transmission mechanism 37b is disposed at a hinge joint of the push rod assembly 2 and the right side of the frame assembly 1, the first traction wheel transmission mechanism 37a and the second traction wheel transmission mechanism 37b respectively control rotation of one traction wheel 10 in a front-rear direction, and the first traction wheel transmission mechanism 37a and the second traction wheel transmission mechanism 37b alternately drive the corresponding traction wheel 10 to rotate along with reversing of the push rod assembly 2;

22-23, the first traction wheel transmission mechanism 37a comprises a first transmission mechanism shell 38a, a first transmission slide spring 39a, a first transmission slide 40a, a first eccentric 41a and a first traction cable 42a, wherein the first transmission mechanism shell 38a is arranged on the left side of the push rod assembly 2 and the frame assembly 1 in a hinged manner, the first transmission mechanism shell 38a is fixed in position relative to the frame assembly 1, and the first transmission slide 40a is arranged inside the first transmission mechanism shell 38a in a telescopic manner through the first transmission slide spring 39 a; one end of the first traction cable 42a extends into the first transmission mechanism shell 38a and then is connected with the first transmission sliding block 40a, the other end of the first traction cable 42a is connected with one corresponding traction wheel 10 through the inside of a pipeline of the frame assembly 1, when the first transmission sliding block spring 39a is in a loose state, one end of the first traction cable 40a extends out of the first transmission mechanism shell 38a so as to facilitate the contact and matching of the first eccentric part 41a, when the first transmission sliding block spring 39a is in a compressed state, one end of the first transmission sliding block 40a is retracted into the first transmission mechanism shell 38a inwards and is used for driving the corresponding traction wheel 10 to rotate, the first traction cable 42a is controlled to perform traction or release actions through the extension and retraction in the first transmission mechanism shell 38a, the first traction cable 42a is controlled to correspond to the rotation wheel 10 through the traction or release actions of the first traction cable, when the first transmission sliding block spring 39a is in a compressed state, one end of the first traction cable 40a is retracted into the first transmission mechanism shell 38a, one end of the first traction cable 40a is retracted into the first traction wheel 10 a corresponding to the push rod assembly 2, when the push rod assembly 2 is arranged on the opposite side of the push rod assembly 2, with the rotation of the push rod assembly 2, the protruding part on the first eccentric member 41a contacts with the protruding end of the first driving slider 40a, and presses the first driving slider 40a into the first driving mechanism housing 38a, the first driving slider spring 39a is in a compressed state, the first traction cable 42a is in a traction state, and further drives the corresponding traction wheel 10 to rotate forward, when the push rod assembly 2 is turned to the front, with the rotation of the push rod assembly 2, the rounded part on the first eccentric member 41a contacts with the protruding end of the first driving slider 40a, the first driving slider spring 39a is in a loose state, the protruding end of the first driving slider 40a is pushed out of the first driving mechanism housing 38a, and the first traction cable 42a is in a release state, and further drives the corresponding traction wheel 10 to rotate reversely;

24-25, the second traction wheel transmission mechanism 37b comprises a second transmission mechanism housing 38b, a second transmission slide spring 39b, a second transmission slide 40b, a second eccentric 41b and a second traction cable 42b, wherein the second transmission mechanism housing 38b is arranged on the left side of the push rod assembly 2 and the frame assembly 1 in a hinged manner, the second transmission mechanism housing 38b is fixed in position relative to the frame assembly 1, and the second transmission slide 40b is arranged inside the second transmission mechanism housing 38b in a telescopic manner through the second transmission slide spring 39 b; one end of the second traction cable 42b extends into the second transmission mechanism shell 38b and then is connected with the second transmission sliding block 40b, the other end of the second traction cable 42b is connected with one corresponding traction wheel 10 through the inside of a pipeline of the frame assembly 1, when the second transmission sliding block spring 39b is in a loose state, one end of the second traction cable 40b extends out of the second transmission mechanism shell 38b so as to facilitate the contact and matching of the second eccentric part 41b, when the second transmission sliding block spring 39b is in a compressed state, one end of the second transmission sliding block 40b is retracted into the second transmission mechanism shell 38b inwards and is used for driving the corresponding traction wheel 10 to rotate, the second traction cable 42b is controlled to perform traction or release actions through the retraction in the second transmission mechanism shell 38b, the second traction cable 42b is controlled to correspond to the rotation wheel 10 through the retraction or release of the second traction cable, when the second transmission sliding block spring 39b is in a compressed state, one end of the second transmission sliding block 40b is retracted into the second transmission mechanism shell 38b, and is retracted into the second transmission mechanism shell 40b, and is retracted into the rotation wheel 10 when the push rod assembly is arranged on the forward and backward side of the push rod assembly 2, and when the push rod assembly is rotated forward and backward, the push rod assembly 2 is rotated together, with the rotation of the push rod assembly 2, the protruding portion on the second eccentric member 41b contacts with the protruding end of the second driving slider 40b, and presses the second driving slider 40b into the second driving mechanism housing 38b, the second driving slider spring 39b is in a compressed state, the second traction cable 42b is in a traction state, and further drives the corresponding traction wheel 10 to rotate forward, when the push rod assembly 2 is turned to the rear, with the rotation of the push rod assembly 2, the rounded portion on the second eccentric member 41b contacts with the protruding end of the second driving slider 40b, the second driving slider spring 39b is in a loose state, and the protruding end of the second driving slider 40b is pushed out of the second driving mechanism housing 38b, and the second traction cable 42b is in a released state, and further drives the corresponding traction wheel 10 to rotate reversely.

Further, the frame assembly 1 is a foldable frame assembly.

Further, as shown in fig. 6 to 9 and 13, the fork 4 is rotatably disposed at the bottom of the corresponding frame joint 3 by a fork steering shaft 43.

Further, referring to fig. 6 to 9, the top end of the brake actuator 12 extends beyond the upper surface of the frame joint 3 to avoid interference with the travel of the brake actuator 12.

Further, referring to fig. 1 to 4, the frame joint 3 and the connecting rail 6, which are located in the same direction, are provided with an upper cover plate and a lower cover plate.

Further, referring to fig. 6 to 10, a traction cable tensioning adjustment block 44 is disposed on the upper surface of each brake lever positioning member 17, and the other end of each traction cable 42 is in tensioning transmission connection with the corresponding traction wheel 10 through the corresponding traction cable tensioning adjustment block 44.

Further, the traction wheel 10 is located at the middle part of the frame connecting cross bar 6.

Further, as shown in fig. 7 and 9, one end of the brake lever reset pin 26, which contacts with the brake lever reset piece contact portion 25, is in a semi-sphere shape, the width of the lower half portion of the brake lever reset piece contact portion 25 is larger than that of the upper half portion thereof, and the width of the lower half portion of the brake lever reset piece contact portion 25 is gradually increased from top to bottom, so that the brake lever reset piece contact portion 25 smoothly pushes the brake lever reset pin 26 into the brake lever positioning hole 22.

Further, referring to fig. 6 to 7, the upper surface of the brake lever 15 is provided with a non-slip groove 55 for increasing friction.

Further, referring to fig. 18-20, a traction cable caulking groove 45, a left directional traction wire caulking groove 46, a right directional traction wire caulking groove 47 and a brake lever positioning traction wire caulking groove 48 are circumferentially arranged on the circumferential surface of the traction wheel 10, the traction cable caulking groove 45, the left directional traction wire caulking groove 46, the right directional traction wire caulking groove 47 and the brake lever positioning traction wire caulking groove 48 are respectively provided with a traction cable fixing clamping groove 49, a left directional traction wire fixing clamping groove 50, a right directional traction wire fixing clamping groove 51 and a brake lever positioning traction wire fixing clamping groove 52 at the tail ends, and the traction cable 42 is fixedly connected with the traction cable fixing clamping groove 49 through the traction cable caulking groove 45, the left directional traction wire is fixedly connected with the traction cable fixing clamping groove 50 through the left directional traction wire caulking groove 46, the right directional traction wire 9 is fixedly connected with the traction cable fixing clamping groove 52 through the right directional traction wire caulking groove 47, and the traction lever positioning clamping groove 52 is fixedly connected with the traction cable fixing clamping groove 52.

Further, the traction cable 42 is fixedly connected with the traction cable fixing slot 49 on the traction wheel 10 after being led in from the frame joint 3 on the right side, and the brake lever 15 and the brake lever resetting piece 23 are both positioned on the right side of the traction wheel 10.

Further, the traction cable fixing slot 49 is located at the left side of the top of the traction wheel 10, the left directional traction wire fixing slot 50 is located at the right side of the top of the traction wheel 10, the right directional traction wire fixing slot 51 is located at the left side of the bottom of the traction wheel 10, and the brake handle positioning traction wire fixing slot 52 is located at the right side of the bottom of the traction wheel 10.

Further, a first traction wheel transmission mechanism 37a is disposed at a position where the push rod assembly 2 is hinged to the left side of the frame assembly 1, the first traction cable 42a is fixedly connected with the traction cable fixing slot 49 on the traction wheel 10 located in front through the inside of the frame assembly 1 in the left side, both the brake lever 15 and the brake lever resetting piece 23 located in front are close to the introducing direction of the first traction cable 42a, a second traction wheel transmission mechanism 37b is disposed at a position where the push rod assembly 2 is hinged to the right side of the frame assembly 1, the first traction cable 42a is fixedly connected with the traction cable fixing slot 49 of the traction wheel 10 located behind through the inside of the frame assembly 1 in the right side, and both the brake lever 15 and the brake lever resetting piece 23 located behind are close to the introducing direction of the second traction cable 42 b.

Further, the brake resetting piece 31 is inserted into the brake resetting piece chute 30 through limit chutes on both sides, so as to ensure that the brake resetting piece 31 always keeps up-and-down sliding in the brake resetting piece chute 30, and avoid outwards popping up the brake resetting piece chute 30.

Further, referring to fig. 17, the brake 29 is composed of a brake body 291, a brake connection 292 and a brake working portion 293, the brake connection 292 is connected to the top of the brake body 291, a brake sliding pin through hole 294 is provided on the brake connection 292, the brake working portion 293 is fixed on the outer side of the brake body 291, when assembled, the brake body 291 is located inside the brake chute 56, the brake working portion 293 is located outside the brake chute 56 and is used for being engaged with the brake clamping slot, the brake connection 292 is located in the brake pressure spring mounting slot 33, the brake sliding pin 35 located in the waist-shaped hole 34 passes through the brake sliding pin through hole 294, and the top of the brake connection 292 is in contact with the bottom end of the brake 36.

Further, referring to fig. 22 to 23, the protruding portions of the first eccentric 41a and the protruding portions of the second eccentric 41b protrude from the rounded outer circumferences of the respective bodies, respectively, and the protruding portions of the first eccentric 41a are located at the front lower portion of the body thereof, and the protruding portions of the second eccentric 41b are located at the rear upper portion of the body thereof.

Further, referring to fig. 23 to 25, the end surfaces of the protruding end of the first driving slider 40a and the protruding end of the second driving slider 40b are respectively provided with a first contact post 56a and a second contact post 56b for facilitating pushing of the first eccentric member 41a and the second eccentric member 41 b.

The working principle of the present invention will be described in detail below by taking the example that the first traction wheel transmission mechanism 37a is installed at the hinge joint of the push rod assembly 2 and the left side of the frame assembly 1, the second traction wheel transmission mechanism 37b is installed at the hinge joint of the push rod assembly 2 and the right side of the frame assembly 1, and the first traction wheel transmission mechanism 37a and the second traction wheel transmission mechanism 37b respectively control the orientation and the brake locking switching of the front wheel and the rear wheel. Also for convenience of description, we define herein the direction of the opening of the infant seat or the infant car hopper on the stroller as the front of the stroller.

When the push rod assembly 2 is reversed from front to rear, the infant faces in the pushing direction. With the rotation of the push rod assembly 2, the projection on the first eccentric 41a contacts the projecting end of the first driving slider 40a and presses the first driving slider 40a into the first driving mechanism housing 38a, so that the first driving slider spring 39a is compressed. Simultaneously, the first driving slider 40a pulls the first traction cable 42a inwards, so that the first traction cable 42a is in a traction state and drives the traction wheel 10 positioned in front to rotate forward.

The front traction wheel 10 rotates along with the forward direction of the traction wheel, and simultaneously drives the front left and right directional traction wires 9 and the front brake handle positioning traction wire 20 to do traction. On the one hand, the front left and right directional traction wires 9 pull the front left and right directional pins 8 to retract into the corresponding frame joint 3, so that the front left and right directional return pressure springs 7 are pressed, at the moment, the front left and right directional pins 8 are not connected with the directional pin clamping grooves 27 on the front left and right wheel forks 4, namely, the front two wheels 5 are in a directional unlocking state, on the other hand, the front brake handle positioning traction wires 20 pull the brake handle positioning pins 19 connected with the front left and right directional pins into the front brake handle positioning pieces 17, the front brake handle positioning pressure springs 18 are pressed, the front brake handle positioning pins 19 are caused to lose the capacity of locking the front brake handle 15, at the moment, the front brake handle 15 simultaneously drives the front brake handle return pieces 23 to be upwards under the elastic action of the front brake handle return torsion springs 16, and the front brake handle positioning springs are caused to be in a non-treaded state, so that the front brake handle 15 cannot be locked by a user.

When the front brake lock is in a disabled state, the front brake lever 15 is lifted, and therefore the front brake lever pulling wire 14 is not pressed and does a releasing action. The left and right brake transmission members 12 connected with the brake handle traction wire 14 in the front are retracted into the frame joint 3 in the front under the action of the elastic force of the front left and right brake transmission member reset pressure springs 11, and at this time, the front left and right brake transmission members 12 do not press the brake reset members 31 on the front left and right wheel forks 4.

The top parts of the front left and right brake return members 31 extend upwards to form top notches of the front left and right brake return member sliding grooves 30 under the action of the elastic force of the brake return member return pressure springs 32, and meanwhile, the front left and right brake members 29 are in a downward spring-open state in the front left and right brake member pressure spring mounting grooves 33 under the action of the elastic force of the brake member pressure springs 36, so that the brake member sliding pins 35 are located at the bottommost ends of the waist-shaped holes 34, and at the moment, the bottoms of the front left and right brake members 29 are all moved to the highest positions and are not contacted with the front left and right brake discs 28, namely, the front left and right wheels 5 are in a brake failure state.

At the same time, as the push rod assembly 2 rotates from front to rear, the rounded portion of the second eccentric member 41b contacts the protruding end of the second driving slider 40b, and the protruding end of the second driving slider 40b is pushed out of the second driving mechanism housing 38b by the elastic force of the second driving slider spring 39 b. Meanwhile, the second driving slider 40b does not apply a pulling force to the second traction cable 42b, so that the second traction cable 42b is in a released state to drive the rear traction wheel 10 to reversely rotate.

The rear traction wheel 10 rotates along with the reverse direction of the traction wheel, and simultaneously drives the rear left and right directional traction wires 9 and the rear brake handle positioning traction wire 20 to perform release actions. On the one hand, the left and right rear directional traction wires 9 are connected with the left and right rear directional pins 8, the left and right rear directional traction wires 7 extend outwards under the action of the elastic force of the rear directional return pressure springs 7, then the left and right rear wheel forks 4 are automatically aligned by pushing of the baby stroller, so that the side with the directional pin clamping grooves 27 faces inwards, at the moment, the left and right rear directional pins 8 are inserted into the directional pin clamping grooves 27 on the left and right rear wheel forks 4, namely, the rear two wheels 5 are in a directional locking state, and on the other hand, the brake handle positioning pins 19 connected with the rear brake handle positioning traction wires 20 extend out of the outer side of the rear brake handle positioning piece 17 under the action of the elastic force of the brake handle positioning pressure springs 18, so that the rear brake handle positioning pins 19 are enabled to have the capability of locking the rear brake handle 15, and the rear brake wheels 15 can be locked.

In the case where the rear brake lever positioning pin 19 has the capability of locking the rear brake lever 15, when the rear brake lever 15 is still in the lifted state, the rear brake lever positioning pin 19 is offset from the brake lever positioning hole 22 on the rear brake lever 15, and the brake lever positioning pin 19 is still pressed by the inner surface of the rear brake lever 15 in the rear brake lever resetting piece 23, that is, in the brake to be locked state. When the rear brake lever 15 is stepped down, the rear brake lever resetting piece 23 rotates downwards together, the inner hole opening of the brake lever positioning hole 22 on the rear brake lever 15 rotates downwards to be aligned with the rear brake lever positioning pin 19, and at the moment, the rear brake lever positioning pin 19 can stretch into the brake lever positioning hole 22 on the rear brake lever 15 under the action of the elastic force of the brake lever positioning pressure spring 18, so that the brake locking of the rear brake lever 15 is realized, and the brake lever 15 cannot be unlocked all the time on the premise that the direction of the push rod assembly 2 is not switched or the brake lever resetting piece 23 is not lifted.

After the rear brake lever positioning pin 19 extends into the brake lever positioning hole 22 on the rear brake lever 15, the rear brake lever positioning pin further contacts one end of the brake lever resetting pin 26 in the rear brake lever positioning hole 22 and pushes the other end of the brake lever resetting pin out of the outer side orifice of the rear brake lever positioning hole 22, so that a manually unlocked contact point is provided for the rear brake lever resetting piece 23. Under the condition that the rear brake lever resetting piece 23 is not lifted, the rear brake lever resetting piece 23 is in an initial state relative to the rear brake lever 15, and at the moment, the rear brake lever resetting piece 23 is opened downwards under the action of the elastic force of the rear brake lever resetting piece pressure spring 24, so that a brake lever resetting piece contact part 25 on the rear brake lever resetting piece 23 does not apply force to the extending end of the rear brake lever resetting pin 26. When a user needs to unlock the rear wheel in advance, the rear brake return piece 31 is kicked upwards by a toe, so that the rear brake handle return piece 23 is in a clamping state relative to the rear brake handle 15, at the moment, the rear brake handle return piece 23 is lifted upwards and presses the rear brake handle return piece spring 24 tightly, the rear brake handle return piece 23 drives the brake handle return piece contact part 25 to push the rear brake handle return pin 26 back into the rear brake handle positioning hole 22, the rear brake handle positioning pin 19 is pushed out of the rear brake handle positioning hole 22 continuously and pushed back into the rear brake handle positioning piece 17, the rear brake handle 15 is lifted upwards together with the rear brake handle return piece 23 under the action of the elastic force of the brake handle return torsion spring 16, and the rear brake handle positioning pin 19 and the brake handle positioning hole 22 on the rear brake handle 15 are lifted upwards again, so that the manual unlocking is realized. Since the rear brake lever positioning pulling wire 20 is still in the released state at this time, the rear brake lever positioning pin 19 still has the capability of locking the rear brake lever 15, namely in the state of waiting for brake locking, and the brake locking of the rear wheel can be realized again only by pressing the rear brake lever 15 again.

When the rear brake lever 15 is simply pressed down or locked after being pressed down, the rear brake lever pulling wire 14 is pressed down and pulled by the downward rotation of the rear brake lever 15. The left and right brake transmission members 12 connected to the rear brake lever pulling wire 14 are pulled and extend out of the lower sides of the rear left and right frame joints 3, and the rear left and right wheel forks 4 are automatically aligned due to pushing of the stroller, so that the side with the brake resetting member 31 faces inwards, and the rear left and right brake transmission members 12 press the brake resetting members 31 on the rear left and right wheel forks 4 exactly downwards.

Next, two situations are encountered during braking, wherein in the first situation, when the rear brake member 29 is just aligned with the brake member clamping groove of the rear brake disc 28, the rear brake return member 31 moves to the lower end of the rear brake return member sliding groove 30 under the pressure of the rear brake transmission member 12, and simultaneously, the rear brake member 29 is in a downward spring-open state in the rear brake member pressure spring mounting groove 33 under the elastic force of the rear brake member pressure spring 36, and the rear brake member sliding pin 35 slides to the bottommost end of the waist-shaped hole 34, so that the rear brake member 29 is directly embedded into the brake member clamping groove of the rear brake disc 28 at one time, namely in a braking working state; in the second case, when the rear brake member 29 is just aligned with the protruding block of the rear brake disc 28, since the rear brake member 29 cannot be directly inserted into the brake member clamping groove of the rear brake disc 28 at one time, the front brake return member 31 will move to the lower end of the rear brake return member sliding groove 30 under the pressure of the rear brake transmission member 12, and compress the rear brake return member return pressure spring 32, and at the same time, the rear brake return member 31 will push the rear brake member 29 to slide downwards by the rear brake return member pressure spring 36 until the rear brake member 29 is in contact with the protruding block of the rear brake disc 28, and as the rear brake return member 31 is further pressed down, the rear brake return member pressure spring 36 will also be continuously compressed until the rear brake member sliding pin 35 moves to the top end of the waist-shaped hole 34, and is in a state to be braked, and then the user only needs to push a little forward or backward, the rear brake member 29 may be adjusted to be aligned with the brake member clamping groove of the rear brake disc 28, at this time, the rear brake member 29 is spring-opened downward in the rear brake member pressure spring 36 acting on the rear brake member pressure spring mounting groove 33, and the rear brake member sliding pin 35 slides to the bottommost end of the waist-shaped hole 34, so that the rear brake member 29 is embedded into the brake member clamping groove of the rear brake disc 28 in stages and is in a braking working state.

When the push rod assembly 2 is reversed from rear to front, the baby is now facing away from the direction of pushing. With the rotation of the push rod assembly 2, the rounded portion of the first eccentric member 41a contacts with the protruding end of the first driving slider 40a, and the protruding end of the first driving slider 40a is pushed out of the first driving mechanism housing 38a under the elastic force of the first driving slider spring 39 a. Meanwhile, the first driving slider 40a does not apply a pulling force to the first traction cable 42a, so that the first traction cable 42a is in a released state to drive the rear traction wheel 10 to reversely rotate. At this time, the directional unlocking state of the two front wheels is automatically switched to the directional locking state, the braking unlocking state of the two front wheels is also automatically switched to the braking waiting locking state, a user is waited to step on the brake lever when needed, and the braking of the two front wheels is realized and the brake lever is locked.

At the same time, as the push rod assembly 2 rotates from front to rear, the projection on the second eccentric 41b contacts the projecting end of the second driving slider 40b and presses the second driving slider 40b into the second driving mechanism housing 38b, so that the second driving slider spring 39b is compressed. Simultaneously, the second driving slider 40b pulls the second traction cable 42b inwards, so that the second traction cable 42b is in a traction state and drives the traction wheel 10 located in front to rotate forward. At this time, the directional locking state of the two rear wheels is automatically switched to the directional unlocking state, the braking locking state of the two rear wheels is also automatically switched to the braking unlocking state, and meanwhile, the working state of the two rear wheels is automatically released.

In summary, the invention has the technical effects that when the push rod assembly rotates to the rear of the baby hopper or the baby seat, the two front wheels can automatically release the directional locking and the braking locking, the two front wheels can freely turn and rotate, the two rear wheels can automatically release the directional locking and the braking locking to be locked, the two rear wheels at the stage can only rotate in the front-rear direction, if the brake handle at the rear side is continuously pressed down, the two rear wheels are actively switched to the braking locking by the braking, the two rear wheels at the stage cannot rotate in the direction and can not rotate, the brake handle at the rear side can be locked until the push rod assembly rotates to the front or the brake handle reset piece is manually started to lock and unlock, when the rod assembly rotates to the front of the baby hopper or the baby seat, the two rear wheels can automatically release the directional locking and the braking locking, the two front wheels can automatically start the directional locking and the braking locking to be locked, if the brake handle at the rear side is continuously pressed down, the two front wheels at the stage can only rotate in the front-rear direction, and the brake handle at the front-rear direction can not be manually started, and the brake handle can be locked when the brake handle at the front side is continuously pressed down, and the front side is not locked to the front or the brake handle is continuously locked, and can not be manually locked, and the brake handle is simultaneously rotated.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A baby stroller capable of automatically switching wheel orientation and brake locking state after reversing, characterized in that: it comprises a frame assembly (1), the upper part of the frame assembly (1) is hinged with a push rod assembly (2) capable of reversing forward and backward, and the bottoms of the left and right frame joints (3) at the front and rear ends of the frame assembly (1) are respectively provided with a universally rotatable wheel fork (4), and each wheel fork (4) is respectively provided with a wheel (5);

Each of the frame joints (3) is provided with a horizontally retractable directional pin (8) through a corresponding directional reset compression spring (7). The two left and right directional pins (8) located in the front and the two left and right directional pins (8) located in the rear are respectively connected to a corresponding traction wheel (10) through two left and right directional traction wires (9). The two traction wheels (10) are rotatably arranged on the connecting cross bars (6) at the front and rear ends of the frame assembly (1). The traction wheel (10) controls the left and right directional traction wires (9) in the same direction to perform traction or release actions at the same time through its own forward and reverse rotation. When the directional traction wire (9) performs a traction action, the directional pin (8) connected thereto is retracted into the corresponding frame joint (3) under the traction of the directional traction wire (9). When the directional traction wire (9) performs a release action, the directional pin (8) connected thereto is extended out of the outer side surface of the lower part of the corresponding frame joint (3) under the elastic force of the corresponding directional reset compression spring (7);

Each of the frame joints (3) is provided with a vertically retractable brake transmission member (12) through a corresponding brake transmission member reset compression spring (11); a corresponding brake handle pull wire (14) is connected between the left and right brake transmission members (12) at the front and between the left and right brake transmission members (12) at the rear through a plurality of guide wheels (13); the front and rear two brake handle pull wires (14) are respectively connected to a corresponding brake handle (15) in a transmission manner; the two brake handles (15) are rotatably and resettably arranged on the connecting cross bar (6) at the front and rear ends of the frame assembly (1) through corresponding brake handle reset torsion springs (16); the two brake handle pull wires (14) respectively pass through the through holes at the lower parts of the corresponding brake handles (15); when the brake handle (15) is subjected to force, the brake handle (15) drives the brake handle reset torsion springs (16) to rotate and reset. The spring (16) is tightened and rotated downward to compress the brake handle pull wire (14). When the brake handle (15) is not subjected to force, the brake handle (15) is lifted upward under the elastic force of the brake handle reset torsion spring (16) without compressing the brake handle pull wire (14). The brake handle (15) controls the brake handle pull wire (14) in the same direction to pull or release by lifting or pressing up or down. When the brake handle pull wire (14) is pulling, the left and right brake transmission members (12) connected thereto are simultaneously extended out of the lower side of the corresponding frame joint (3) under the traction of the brake handle pull wire (14). When the brake handle pull wire (14) is released, the left and right brake transmission members (12) connected thereto are simultaneously retracted into the inside of the corresponding frame joint (3) under the elastic force of the corresponding brake transmission member reset compression spring (11).

A brake handle positioning member (17) is provided between the traction wheel (10) and the brake handle (15) at the front and between the traction wheel (10) and the brake handle (15) at the rear. The two brake handle positioning members (17) are respectively fixedly connected to the connecting cross bars (6) at the front and rear ends of the frame assembly (1). A horizontally retractable brake handle positioning pin (19) is provided inside each of the brake handle positioning members (17) through a corresponding brake handle positioning compression spring (18). The front and rear two brake handle positioning pins (19) are respectively transmission-connected to the traction wheel (10) in the same direction through a corresponding brake handle positioning traction wire (20). The traction wheel (10) controls the brake handle positioning traction wire (20) in the same direction to perform traction or release action through its own forward and reverse rotation. When the brake handle positioning traction wire (20) performs traction action, it is connected with the traction wheel (10) in the same direction. The brake handle positioning pin (19) connected thereto is retracted into the corresponding brake handle positioning piece (17) under the traction of the brake handle positioning wire (20); when the brake handle positioning wire (20) is released, the brake handle positioning pin (19) connected thereto extends out of the outer side surface of the corresponding brake handle positioning piece (17) under the elastic force of the corresponding brake handle positioning compression spring (18); at the same time, a protruding brake handle positioning block (21) is provided on the top of the brake handle (15); a brake handle positioning hole (22) is provided on the brake handle positioning block (21) and horizontally passes through the left and right surfaces of the brake handle positioning block (21); when the brake handle (15) is pressed downward, the inner side opening of the brake handle positioning hole (22) rotates downward to align with the protruding part of the brake handle positioning pin (19), so that the brake handle positioning pin (19) extends into the brake handle positioning hole (22);

A corresponding brake handle reset member (23) is attached to the lower side of the front and rear brake handles (15), respectively. The two brake handle reset members (23) are rotatably arranged on the connecting cross bars (6) at the front and rear ends of the frame assembly (1), respectively. The two brake handle reset members (23) are synchronously rotated with the corresponding brake handles (15) through the brake handle reset torsion springs (16), and each of the brake handle reset members (23) has a protruding brake handle reset member contact portion (25) extending upward to the top of the brake handle reset member (23). The upper surface of the corresponding brake handle (15); a brake handle reset member compression spring (24) is connected between each of the brake handle reset members (23) and the corresponding brake handle (15); at the same time, a horizontally movable brake handle reset pin (26) is provided in the brake handle positioning hole (22) of each of the brake handles (15); when the brake handle positioning pin (19) extends into the inner opening of the brake handle positioning hole (22), the brake handle positioning pin (19) contacts and engages with one end of the brake handle reset pin (26). The other end of the brake handle reset member (23) is pushed out of the outer opening of the brake handle positioning hole (22); when the brake handle reset member (23) is in the initial state relative to the brake handle (15) at this time, the brake handle reset member (23) opens downward under the elastic force of the brake handle reset member compression spring (24), and the brake handle reset member contact portion (25) of the brake handle reset member (23) does not apply force to the brake handle reset pin (26); when the brake handle reset member (23) is in the clamped state relative to the brake handle (15) at this time, the The brake handle reset member (23) presses the brake handle reset member compression spring (24) and lifts it upward, and the brake handle reset member (23) drives the brake handle reset member contact portion (25) to push the brake handle reset pin (26) back into the brake handle positioning hole (22), and the brake handle reset pin (26) then pushes the brake handle positioning pin (19) back into the brake handle positioning member (17), and the brake handle (15) is lifted upward under the elastic force of the brake handle reset torsion spring (16) without pressing the brake handle guide wire (14);

The inner side surface of the top of each wheel fork (4) is provided with a directional pin slot (27) for plugging and cooperating with the directional pin (8). When the directional pin (8) extends out of the outer side surface of the lower part of the frame joint (3) to which it belongs, the directional pin (8) is inserted into the corresponding directional pin slot (27); the inner side of each wheel (5) is provided with a brake disc (28) coaxial with the wheel (5), and the brake disc (28) is a gear-shaped disc, and the groove on the gear-shaped disc constitutes a brake member slot; the inner surface of the inner side bracket of each wheel fork (4) is provided with a brake member slide groove (56), and a brake member (29) that can slide up and down is arranged in the brake member slide groove (56); the outer surface of the inner side bracket of each wheel fork (4) is provided with a brake reset member slide groove (30), and a brake reset member that can slide up and down is arranged in the brake reset member slide groove (30). Part (31), two brake reset compression springs (32) are arranged between the bottom of the brake reset part (31) and the bottom of the brake reset part slide groove (30); a brake spring mounting groove (33) is arranged at the bottom of the brake reset part (31), and a waist-shaped hole (34) is arranged on the lower side of the brake spring mounting groove (33), and a brake sliding pin (35) that can slide up and down is arranged in the waist-shaped hole (34), the upper part of the brake part (29) is located in the brake spring mounting groove (33), and the brake sliding pin (35) is fixedly connected to the upper part of the brake part (29) through the brake sliding pin (35), and a brake spring (36) is arranged between the top of the brake part (29) and the top of the brake spring mounting groove (33); when in the brake release state, the bottom of the brake part (29) moves to The brake member (29) is in the highest position and is not in contact with the brake disc (28). At this time, the brake reset member return spring (32) and the brake member compression spring (36) are both in a relaxed state. The top of the brake reset member (31) extends upward from the top notch of the brake reset member slide groove (30) under the elastic force of the brake reset member return spring (32) so as to contact and cooperate with the brake transmission member (12). At the same time, the brake member (29) is in a downwardly ejected state in the brake member compression spring mounting groove (33) under the elastic force of the brake member compression spring (36), and the brake member sliding pin (35) is located at the bottom of the waist-shaped hole (34); when in the waiting state for braking, the bottom of the brake member (29) moves to the middle position and contacts the protrusion on the brake disc (28). At this time, the brake reset member (31) moves to the brake reset member under the pressure of the brake transmission member (12). At the lower end of the slide groove (30), the brake reset member reset compression spring (32) is in a compressed state, and at the same time, the brake member compression spring (36) is squeezed in a compressed state under the pressure of the brake reset member (31), and the brake member sliding pin (35) is at the top of the waist-shaped hole (34); when in the brake working state, the bottom of the brake member (29) moves to the lowest position and is embedded in the brake member slot of the brake disc (28). At this time, the brake reset member (31) moves to the lower end of the brake reset member slide groove (30) under the pressure of the brake transmission member (12), and the brake reset member reset compression spring (32) is in a compressed state. At the same time, the brake member (29) is in a downwardly popped open state in the brake member compression spring mounting groove (33) under the elastic force of the brake member compression spring (36), and the brake member sliding pin (35) is located at the bottom of the waist-shaped hole (34);

A first traction wheel transmission mechanism (37a) is provided at the left hinge of the push rod assembly (2) and the frame assembly (1), and a second traction wheel transmission mechanism (37b) is provided at the right hinge of the push rod assembly (2) and the frame assembly (1). The first traction wheel transmission mechanism (37a) and the second traction wheel transmission mechanism (37b) respectively control the rotation of one of the traction wheels (10) in the front and rear directions, and the first traction wheel transmission mechanism (37a) and the second traction wheel transmission mechanism (37b) drive the corresponding traction wheel (10) to rotate alternately as the push rod assembly (2) changes direction.

The first traction wheel transmission mechanism (37a) comprises a first transmission mechanism housing (38a), a first transmission slider spring (39a), a first transmission slider (40a), a first eccentric member (41a) and a first traction rope (42a); the first transmission mechanism housing (38a) is hingedly arranged on the left side of the push rod assembly (2) and the frame assembly (1), and the first transmission mechanism housing (38a) is fixed relative to the frame assembly (1); the first transmission slider (40a) is telescopically arranged inside the first transmission mechanism housing (38a) through the first transmission slider spring (39a); one end of the first traction rope (42a) extends into the first transmission mechanism housing (38a) and then connected to the first transmission slider (40a), and the other end of the first traction rope (42a) is connected to one of the corresponding traction wheels (10) through the inside of the pipe of the frame assembly (1); when the first transmission slider spring (39a) is in a relaxed state, one end of the first transmission slider (40a) extends outward from the first transmission mechanism housing (38a) to facilitate contact and cooperation with the first eccentric member (41a); when the first transmission slider spring (39a) is in a compressed state, one end of the first transmission slider (40a) is retracted inward into the first transmission mechanism housing (38a) to drive the corresponding traction wheel (10) to rotate; the first transmission The movable slider (40a) controls the first traction rope (42a) to perform traction or release by extending and retracting in the first transmission mechanism housing (38a), and the first traction rope (42a) controls the corresponding forward and reverse rotation of the traction wheel (10) by its own traction or release; the first eccentric piece (41a) is arranged at the bottom end of the push rod assembly (2) on the left side, and rotates together with the push rod assembly (2); when the push rod assembly (2) is reversed to the rear, as the push rod assembly (2) rotates, the protrusion on the first eccentric piece (41a) contacts the protruding end of the first transmission slider (40a), and presses the first transmission slider (40a) into the first transmission mechanism housing (38a). In the mechanism housing (38a), the first transmission slider spring (39a) is in a compressed state, the first traction rope (42a) is in a traction state, thereby driving the corresponding traction wheel (10) to rotate in the forward direction; when the push rod assembly (2) is reversed to the front, as the push rod assembly (2) rotates, the smooth portion on the first eccentric member (41a) contacts the protruding end of the first transmission slider (40a), the first transmission slider spring (39a) is in a relaxed state, the protruding end of the first transmission slider (40a) is pushed out of the first transmission mechanism housing (38a), and the first traction rope (42a) is in a released state, thereby driving the corresponding traction wheel (10) to rotate in the reverse direction;

The second traction wheel transmission mechanism (37b) comprises a second transmission mechanism housing (38b), a second transmission slider spring (39b), a second transmission slider (40b), a second eccentric member (41b) and a second traction rope (42b); the second transmission mechanism housing (38b) is hingedly arranged on the left side of the push rod assembly (2) and the frame assembly (1), and the second transmission mechanism housing (38b) is fixed relative to the frame assembly (1); the second transmission slider (40b) is telescopically arranged inside the second transmission mechanism housing (38b) through the second transmission slider spring (39b); one end of the second traction rope (42b) extends into the second transmission mechanism housing (38b) and then connected to the second transmission slider (40b), the other end of the second traction rope (42b) is connected to one of the corresponding traction wheels (10) through the inside of the pipe of the frame assembly (1); when the second transmission slider spring (39b) is in a relaxed state, one end of the second transmission slider (40b) extends outward from the second transmission mechanism housing (38b) to facilitate the contact and cooperation of the second eccentric member (41b); when the second transmission slider spring (39b) is in a compressed state, one end of the second transmission slider (40b) is retracted inward into the second transmission mechanism housing (38b) to drive the corresponding traction wheel (10) to rotate; the second transmission The movable slider (40b) controls the second traction rope (42b) to perform traction or release by extending and retracting in the second transmission mechanism housing (38b), and the second traction rope (42b) controls the corresponding forward and reverse rotation of the traction wheel (10) by its own traction or release; the second eccentric piece (41b) is arranged at the bottom end of the push rod assembly (2) on the left side, and rotates together with the push rod assembly (2); when the push rod assembly (2) is reversed to the front, as the push rod assembly (2) rotates, the protrusion on the second eccentric piece (41b) contacts the protruding end of the second transmission slider (40b), and presses the second transmission slider (40b) into the second transmission mechanism housing (38b). Inside the mechanism housing (38b), the second transmission slider spring (39b) is in a compressed state, the second traction rope (42b) is in a traction state, thereby driving the corresponding traction wheel (10) to rotate in the forward direction; when the push rod assembly (2) is reversed to the rear, as the push rod assembly (2) rotates, the smooth portion on the second eccentric member (41b) contacts the protruding end of the second transmission slider (40b), the second transmission slider spring (39b) is in a relaxed state, the protruding end of the second transmission slider (40b) is pushed out of the second transmission mechanism housing (38b), and the second traction rope (42b) is in a released state, thereby driving the corresponding traction wheel (10) to rotate in the reverse direction.

2. The baby stroller that automatically switches wheel orientation and brake lock status after reversing according to claim 1 is characterized in that: the frame assembly (1) is a foldable frame assembly.

3. The baby stroller with automatic switching of wheel orientation and brake locking state after reversing according to claim 1 is characterized in that the wheel fork (4) is rotatably arranged at the bottom of the corresponding frame joint (3) through the wheel fork steering shaft (43).

4. The baby stroller that automatically switches the wheel orientation and brake locking state after reversing according to claim 1 is characterized in that the top end of the brake transmission member (12) extends out of the upper surface of the frame joint (3) to avoid interfering with the travel of the brake transmission member (12).

5. The baby stroller with automatic switching of wheel orientation and brake locking state after reversing according to claim 1 is characterized in that an upper cover plate and a lower cover plate are commonly provided on the frame joint (3) and the connecting cross bar (6) located in the same direction.

6. The baby stroller that automatically switches the wheel orientation and brake locking state after reversing according to claim 1 is characterized in that a traction rope tensioning adjustment block (44) is provided on the upper surface of each brake handle positioning member (17), and the other end of each traction rope is tensioned and transmitted to the corresponding traction wheel (10) through the corresponding traction rope tensioning adjustment block (44).

7. The baby stroller according to claim 1, which automatically switches the wheel orientation and brake locking state after reversing, is characterized in that: the circumferential surface of the traction wheel (10) is circumferentially provided with a traction cable groove (45), a left directional traction wire groove (46), a right directional traction wire groove (47) and a brake handle positioning traction wire groove (48), and the ends of the traction cable groove (45), the left directional traction wire groove (46), the right directional traction wire groove (47) and the brake handle positioning traction wire groove (48) are respectively provided with a traction cable fixing groove (49), a left directional traction wire fixing groove (50), a right directional traction wire fixing groove (51) and a brake handle positioning traction wire groove (52). The traction wire fixing slot (51) and the brake handle positioning traction wire fixing slot (52); the traction wire is fixedly connected to the traction wire fixing slot (49) through the traction wire embedding slot (45); the directional traction wire on the left side is fixedly connected to the left directional traction wire fixing slot (50) through the left directional traction wire embedding slot (46); the directional traction wire (9) on the right side is fixedly connected to the right directional traction wire fixing slot (51) through the right directional traction wire embedding slot (47); the brake handle positioning traction wire (20) is fixedly connected to the brake handle positioning traction wire fixing slot (52) through the brake handle positioning traction wire embedding slot (48).

8. The baby stroller with automatic wheel orientation switching and brake locking state after reversing according to claim 7 is characterized in that: the first traction wheel transmission mechanism (37a) is arranged at the left hinge of the push rod assembly (2) and the frame assembly (1), and the first traction rope (42a) is fixedly connected to the traction rope fixing groove (49) on the traction wheel (10) located in the front through the inside of the frame assembly (1) on the left side, and the brake handle (15) and the brake handle reset member (23a) located in the front are fixedly connected to the traction rope fixing groove (49) on the traction wheel (10) located in the front. ) are both close to the introduction direction of the first traction rope (42a); the second traction wheel transmission mechanism (37b) is arranged at the right hinge of the push rod assembly (2) and the frame assembly (1), and the first traction rope (42a) is fixedly connected to the traction rope fixing groove (49) of the traction wheel (10) located at the rear through the inside of the frame assembly (1) on the right side, and the brake handle (15) and the brake handle reset member (23) located at the rear are both close to the introduction direction of the second traction rope (42b).

9. The baby stroller that automatically switches the wheel orientation and brake locking state after reversing according to claim 8 is characterized in that: the traction rope fixing slot (49) is located on the left side of the top of the traction wheel (10), the left directional traction wire fixing slot (50) is located on the right side of the top of the traction wheel (10), the right directional traction wire fixing slot (51) is located on the left side of the bottom of the traction wheel (10), and the brake handle positioning traction wire fixing slot (52) is located on the right side of the bottom of the traction wheel (10).

10. The baby stroller with automatic wheel orientation switching and brake locking state after reversing according to claim 1 is characterized in that: the brake member (29) is composed of a brake member main body (291), a brake member connecting part (292) and a brake member working part (293), the brake member connecting part (292) is connected to the top of the brake member main body (291), and a brake member sliding pin through hole (294) is provided on the brake member connecting part (292), and the brake member working part (293) is fixed on the outside of the brake member main body (291). surface; during assembly, the brake component main body (291) is located on the inner side of the brake component slide groove (56), and the brake component working part (293) is located on the outer side of the brake component slide groove (56), and is used to be plugged into and matched with the brake component slot, and the brake component connecting part (292) is located in the brake component compression spring mounting groove (33), and the brake component sliding pin (35) located in the waist-shaped hole (34) passes through the brake component sliding pin through hole (294), and the top of the brake component connecting part (292) contacts the bottom end of the brake component compression spring (36).