CN102343846B - child safety seat - Google Patents

Abstract

A child safety seat comprises a seat portion and a backrest portion. The backrest part is assembled on the seat part and comprises a first support frame, a second support frame and a locking component. The second support frame can be movably assembled with the first support frame relative to the first support frame. The locking assembly comprises a bolt locking piece which is connected to the second support frame in a sliding mode, wherein the bolt locking piece extends to the first support frame approximately along the second support frame, and the bolt locking piece comprises at least one flexible portion capable of being elastically deformed and a clamping end portion arranged at the tail end of the flexible portion. The latch piece moves towards a first direction to drive the flexible part, so that the clamping end part moves towards a second direction to be separated from or clamped in the groove arranged in the first support frame; when the clamping end part is clamped in the groove, the locking component is positioned in a locking state, and the second support frame is fixed on the first support frame.

Description

child safety seat

【Technical field】

The invention relates to a child safety seat with an adjustable backrest.

【Background technique】

During the growth process, children are smaller than adults, and the front and rear seat spaces in general vehicles are designed according to the adult body shape. Therefore, when riding in a general vehicle, parents often need to use a child seat designed to match the body shape of the child, so as to provide the child with a relatively stable load-carrying space during the driving process.

The current child safety seat is mainly designed to provide a certain degree of covering for the head and body of the child with the headrest, backrest and waistrest, so as to limit the degree of shaking of the child's head and body and protect the child's head and body. The safety of children can be maintained because of sudden turns or violent shocks during driving. Secondly, in order to make the body size differences of children of different ages applicable to traditional child safety seats, a mechanism for adjusting the height of the seat is usually designed so that the child safety seats can be suitable for young children of different ages. However, conventional child safety seats have complicated mechanisms designed to provide seat height adjustment functions. In addition, during packaging and shipping, the traditional integrally connected child safety seat cannot be disassembled or folded, which requires a large amount of packaging material and takes up storage space, resulting in increased costs.

In view of this, there is a current demand for a child safety seat that can improve the above deficiencies, provide more convenient use, simpler structure and lower manufacturing cost.

【Content of invention】

An object of the present invention is to provide a child safety seat, which is provided with a unique locking assembly in the backrest of the child safety seat to provide locking and unlocking functions, and allows quick disassembly and assembly of the backrest, making children safe Seats are more convenient to use.

According to an embodiment of the present invention, there is provided a child safety seat, which is characterized in that it includes: a seat portion; and a backrest portion assembled to the seat portion, wherein the backrest portion includes: a first a support frame; a second support frame, wherein the second support frame can be movably assembled with the first support frame relative to the first support frame; and a locking assembly, including a sliding assembly on the second support frame A latch on the frame, wherein the latch extends approximately along the second support frame to the first support frame, and the latch contains at least one elastically deformable flexure, and is arranged on the flexure An engaging end at the end, wherein the flexure can be driven by the latch moving in a first direction, so that the engaging end moves in a second direction to disengage or engage with the first The groove provided in the support frame; when the engaging end is separated from the groove, the locking assembly is in an unlocked state, and the second support frame can be displaced relative to the first support frame; when the engaging end When the part is engaged with the groove, the locking component is in a locked state, and the second support frame is fixed on the first support frame.

The above child safety seat is characterized in that: the first direction is substantially perpendicular to the second direction.

The above-mentioned child safety seat is characterized in that: the second supporting frame is provided with several guiding ribs for contacting and guiding the flexure portion.

The above-mentioned child safety seat is characterized in that: the second support frame includes a slide rail, and the first support frame defines a groove, and the slide rail is slidably assembled in the groove.

The above-mentioned child safety seat is characterized in that: the locking assembly further includes a spring member, one end of the spring member is arranged on the latch member, and the other end of the spring member is used to abut against the second support frame, so that The spring member will bias the latch member in a direction opposite to the first direction.

The above-mentioned child safety seat is characterized in that: the latching member has a boss, and one end of the spring member is sleeved on the boss of the latching member.

The above-mentioned child safety seat is characterized in that: the second support frame has a protruding column, the latch has a limiting groove, and the protruding column passes through the limiting groove to limit the relative In the moving range of the second supporting frame, the other end of the spring element abuts against the boss.

The above-mentioned child safety seat is characterized in that: the protrusion has a limit screw for interfering with the latch to prevent the latch from detaching from the protrusion.

The above-mentioned child safety seat is characterized in that a pair of limiting ribs are provided on both sides of the track to limit the sliding of the sliding track in the groove.

The above-mentioned child safety seat is characterized in that: the first support frame is also provided with a limiting structure, when the locking assembly is in the unlocked state and the second support frame is adjusted relative to the first support frame, The locking end can be interfered with by the limiting structure to prevent the second support frame from detaching from the first support frame.

The above-mentioned child safety seat is characterized in that: the second support frame is also provided with a movable stopper, and when the bolt lock moves to the first direction, the stopper is used to interfere with the latch. The locking part is used to limit the movement of the latching part in the first direction. When the stopper is moved to release the interference between the stopper and the latching part, the latching part can move in the first direction to make the limit The structure is released from interfering with the engaging end, so that the second support frame is separated from the first support frame.

The above-mentioned child safety seat is characterized in that: the stopper has an elastic tongue, the elastic tongue is flexibly arranged on the second support frame, and the latch has a pulling part, when When the latching part moves to the first direction, the elastic tongue is used to interfere with the holding part, and when the elastic tongue is deflected to release the interference between the elastic tongue and the latching part, the locking assembly is positioned at the unlocked state.

The above-mentioned child safety seat is characterized in that: the second support frame is provided with at least one limiter above the engaging end, when the locking assembly is in the unlocked state and the second support frame When adjusting relative to the first supporting frame, the limiting structure can interfere with the limiting member to prevent the second supporting frame from breaking away from the first supporting frame.

The above-mentioned child safety seat is characterized in that: the upper surface of the limiting structure has an inclined surface, and when the latch moves to the opposite direction to the first direction, the inclined surface is used to push the engaging end Move away from the limit structure.

The above-mentioned child safety seat is characterized in that: the second support frame has a limiter, which is used to interfere with an extended flange on the first support frame, so as to prevent the second support frame from detaching from the first support frame. a support frame.

The above-mentioned child safety seat is characterized in that: the second support frame includes a headrest and a backrest.

The child safety seat is characterized in that a pair of first side wings are provided on both sides of the headrest, and a pair of second side wings are provided on both sides of the backrest.

The above-mentioned child safety seat is characterized in that: a pair of third side wings are arranged on both sides of the first support frame.

The above child safety seat is characterized in that: the first support frame is detachably combined with the seat part.

The above-mentioned child safety seat is characterized in that: the first support part has at least one joint part, the seat part has a connecting part, and the joint part is connected with the connecting part.

The above-mentioned child safety seat is characterized in that: the joint part is a C-shaped buckle, and the connecting part is a rod.

The above-mentioned child safety seat is characterized in that: the first support frame is a lumbar support.

According to another embodiment of the present invention, there is provided a child safety seat, which is characterized in that: comprising:

a seat portion; and

A back rest, the back rest includes:

a first support frame, the first support frame is detachably combined with the seat portion;

a second support frame, wherein the second support frame is detachably combined with the first support frame relative to the first support frame; and

A locking component, which is arranged between the first supporting frame and the second supporting frame, when the locking component is in an unlocked state, the second supporting frame can be displaced relative to the first supporting frame; when the locking component In a locked state, the second support frame is fixed on the first support frame.

The above-mentioned child safety seat is characterized in that: the first support part has at least one joint part, the seat part has a connecting part, and the joint part is detachably connected to the connecting part.

The above-mentioned child safety seat is characterized in that: the first support frame is a waist support, and the second support frame includes a back support.

With the aforementioned design, the structure of the locking assembly can be simplified to reduce manufacturing cost. In addition, the user can easily complete the adjustment, disassembly and assembly of the backrest through the locking component. The backrest or waistrest can be disassembled and assembled according to the child's riding needs, so that the use of the child safety seat is more diversified. more convenient.

【Description of drawings】

FIG. 1 is a front schematic view of a child safety seat provided according to an embodiment of the present invention.

Fig. 2 is an exploded view of the backrest in the child safety seat.

FIG. 3 is a schematic diagram illustrating the assembly of the backrest portion of the child safety seat.

FIG. 4 is a schematic diagram illustrating an assembled state of the first support frame and the second support frame in the backrest portion.

FIG. 5 is a schematic diagram illustrating the unlocked state of the locking component in the child safety seat.

FIG. 6 illustrates that the second support frame in the backrest of the child safety seat is adjusted to a height different from that of FIG. 4 .

FIG. 7 is an enlarged schematic view showing the limiting structure in the backrest portion.

FIG. 8 is a schematic diagram showing the disassembly action of the second support frame and the first support frame.

FIG. 9 is a schematic diagram illustrating interference between the locking end and the limiting structure according to another embodiment of the present invention.

FIG. 10 illustrates another position-limiting structure adopted by the present invention to prevent the second support frame from detaching from the first support frame.

11 to 13 are schematic diagrams showing different usage states of the child safety seat.

100 child safety seat

101 seat part 101A connecting piece

102 Backrest 102A Joint

103 locking components

104 first support frame 104A side wing

105 second support frame 104B leaning plate

                                                                                          

1051 track 1053 limit rib

1055 boss

106 latches

1061 pulling part                       1062 extension

1063 flexure 1064 snap-in end

1064A protrusion 1065 limit slot

1066 Boss

107 sliding rail

1072 guiding rib 1074 side wall

1075 limit piece 108 groove

108A, 108B, 108C, 108D, 108E, 1083, 1083A groove

108F side wall

109 back to 109A flank

110 headrest 110A flank

1101 stopper 1088A extension flange

111 elastic parts

113 fasteners

116, 117 limit structure

116A bevel

W width

【Detailed ways】

To further illustrate the various embodiments, the present invention is provided with accompanying drawings. These drawings are a part of the disclosure of the present invention, which are mainly used to illustrate the embodiments, and can be combined with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should understand other possible implementations and advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to denote similar components.

The child safety seat provided by the present invention includes a seat portion and a backrest portion, wherein the backrest portion includes a first support frame and a second support frame that can be adjusted relatively, and a A unique locking assembly provides locking and unlocking functions. The locking component can realize the locking and unlocking functions by operating the latching part containing the elastic flexure, which can reduce the amount of parts used, so as to reduce the manufacturing cost. In addition, the locking component also allows quick disassembly and assembly of the backrest, providing a child safety seat that is more convenient to use.

FIG. 1 is a front schematic diagram of a child safety seat 100 provided according to an embodiment of the present invention, FIG. 2 is an exploded view of the backrest 102 in the child safety seat 100 , and FIG. 3 shows the child safety seat 100 Schematic diagram of assembly of the middle backrest 102 . Referring to FIG. 1 , a rear view of a child safety seat 100 is shown. The child safety seat 100 includes a seat portion 101 and a backrest portion 102 . The backrest portion 102 is movably assembled with the seat portion 101 to form a loading space for children to sit in. In this embodiment, the seat part 101 and the backrest part 102 can be pivotally connected to the connecting part 101A ( For example, a rod), the backrest portion 102 is detachably connected to the seat portion 101 . In addition to the above structures, the seat portion 101 and the backrest portion 102 can also be connected to each other in other ways. In addition, the child safety seat 100 can also be covered with soft fabric or elastic body (not shown) on the outside of the seat portion 101 and the backrest portion 102 to provide a more comfortable riding experience.

The backrest portion 102 includes a first support frame 104 , a second support frame 105 , and a locking component 103 disposed between the first support frame 104 and the second support frame 105 . The first support frame 104 of this embodiment is, for example, a lumbar support that provides lumbar support, and the second support frame 105 may include a backrest 109 that provides back support, a headrest 110 that provides head support, and the opposite side of the headrest 110. The sliding rail 107. According to this embodiment, the second supporting frame 105 including the sliding rail 107 , the backrest 109 and the headrest 110 can be integrally formed, and the sliding rail 107 can have an M shape. The sliding rail 107 is slidably connected to the groove 108 provided in the first support frame 104, so that the second support frame 105 can move up and down vertically relative to the first support frame 104, so as to increase or shorten the first support frame 104 and the second support frame 105, so as to adjust the height of the second support frame 105 relative to the first support frame 104 to meet the height of the user. In addition, the left and right sides of the first support frame 104 and the second support frame 105 can also be bent to form several side wings 104A, 109A, and 110A, so as to provide lateral support and increase the safety of use.

As shown in FIG. 2 , the groove 108 disposed on the first support frame 104 is approximately located in the central area of the first support frame 104 and has an approximately M-shape. The groove 108 has several sidewalls 108A, 108B, 108C and 108D, wherein the sidewall 108A is the front side surface corresponding to the sliding rail 107, the sidewall 108B of the groove 108 corresponds to the back side of the sliding rail 107, and the sidewalls 108C and 108D are respectively parallel to the left and right side edges of the sliding rail 107 . Two sides of the side wall 108A are respectively arranged with a plurality of grooves 1083 for engaging the locking component 103 , so as to lock the second supporting frame 105 with the first supporting frame 104 at different heights. For the connection relationship between the locking component 103 and the groove 1083 , please refer to the following detailed description.

Continuing to refer to FIG. 2 , the locking assembly 103 includes a movable latch 106 and a spring 111 . The locking member 106 includes a pulling portion 1061 , an extending portion 1062 , a pair of elastically deformable bending portions 1063 and two engaging end portions 1064 . The pulling portion 1061 is fixed on a first end of the extension portion 1062, each flexure portion 1063 is connected to a second end of the extension portion 1062 opposite to the pulling portion 1061, and the engaging end portions 1064 are respectively disposed on each of the extension portions 1062. The end of the flexure 1063 . Each flexure 1063 can be made of elastic material, so that the flexure 1063 can be elastically deformed (that is, deformed when subjected to external force, and can return to its original shape after the external force is removed). Each flexure portion 1063 is bent toward opposite sides of the locking member 106 to form a T-shape. When the locking member 106 moves in a first direction along the second support frame 105, such as an upward direction in FIG. The movement in the second direction, such as the left-right direction in FIG. 2 , makes the engaging end 1064 engage with or disengage from the corresponding groove 1083 , thereby realizing the locking or unlocking action. To enhance the locking effect, the width W of the locking end portion 1064 may be greater than the width of the flexure portion 1063 . Although this embodiment uses two flexure portions 1063 and engaging end portions 1064 , the present invention can also use only one, or more than two flexure portions and engaging end portions.

FIG. 3 is a schematic diagram illustrating the assembly of the latch 106 and the second support frame 105 . The latching part 106 is slidably assembled in the track 1051 provided on the back of the second support frame 105, so that the latching part 106 can move vertically up and down. Several limit ribs 1053 (refer to FIG. 1 ) can also be provided on the side edge of the rail 1051 to prevent the latch 106 from slipping out when sliding. In addition, a limiting slot 1065 can be defined on the locking member 106 along the direction of the extending portion 1062 , and a protrusion 1055 can be protruded from the back of the second supporting frame 105 . When the bolt lock piece 106 is installed on the back of the second support frame 105, the boss 1055 is passed through the limiting groove 1065, and the spring member 111 is arranged on the boss 1055 and the boss on the bolt lock piece 106. Between Taiwan 1066. The fastener 113 (such as a limit screw) can pass through and engage with the protrusion 1055 to prevent the latch 106 from detaching from the track 1051 of the second support frame 105 . Accordingly, the vertical sliding range of the locking member 106 relative to the second support frame 105 can be limited by the limiting groove 1065 .

FIG. 4 is a schematic diagram illustrating the assembly of the first support frame 104 and the second support frame 105 in the child safety seat 100, in which the side wall 108B of the groove 108 is not shown in order to more clearly show the slide rail 107 and the locking assembly 103 in the child safety seat 100. Assembly in trench 108 . As shown in FIG. 4 , when the latch 106 is assembled on the second support frame 105, the latch 106 extends approximately along the length of the second support frame 105 to the first support frame 104, wherein the pulling portion 1061 is disposed adjacent to At the headrest 110 , the extension portion 1062 approximately extends along the backrest 109 and the sliding rail 107 , and the flexure portion 1063 and the engaging end portion 1064 are located adjacent to the bottom end of the sliding rail 107 . On the back side of the slide rail 107, several guide ribs 1072 (shown more clearly in FIG. 7 ) are protruded at different positions corresponding to the flexures 1063 to contact and guide the flexures 1063 so that the flexures 1063 produce elastic deformation. The flexures 1063 are respectively bent towards the left and right opposite sides of the slide rail 107, that is, toward the side walls 108E and 108F, so that the engaging ends 1064 can pass through the left and right opposite side walls 1074 provided on the slide rail 107 respectively. . With the movement of the latch 106, the elastic deformation and displacement of each flexure 1063 can be driven, so that the engaging end 1064 protruding from the opposite side wall 1074 can be disengaged or engaged with the first supporting frame 104. Corresponding to the groove 1083, the locking assembly 103 is switched to the unlocked state or the locked state respectively. In this embodiment, the moving direction of the locking part 106 is preferably substantially perpendicular to the moving direction of the engaging end 1064, for example, the locking part 106 moves up and down to make the engaging end 1064 move horizontally. move. A stopper 1101 is located on the back of the headrest 110 , and is flexibly disposed on the second supporting frame 105 adjacent to the pulling portion 1061 . When the latching member 106 moves in the first direction, the stopper 1101 is used to interfere with the pulling portion 1061 of the latching member 106 , so it can be used to limit the upward movement of the latching member 106 . According to an embodiment, the stopper 1101 is, for example, an elastic tongue formed by protruding from the second support frame 105 , and the elastic tongue can be flexed to release the stopper 1101 from interfering with the pulling part 1061 . The action and function of the stopper 1101 will be described in detail in the following paragraphs. In short, when the latching part 106 moves up to collide with the stopper 1101 , the latching part 106 can be stopped by the mutual interference between the pulling part 1061 and the stopper 1101 , so as to realize the unlocked state.

Next, please refer to FIG. 4 , FIG. 5 and FIG. 6 to illustrate the adjustment method of the second support frame 105 relative to the first support frame 104 . Referring first to FIG. 4 , the engaging end 1064 of the locking member 106 protrudes from the opposite side wall 1074 of the sliding rail 107 and engages with the corresponding groove 1083 on the first support frame 104, so that the locking assembly 103 is in a locked state. , so as to fix the height of the second support frame 105 relative to the first support frame 104 .

FIG. 5 is a schematic diagram illustrating the locking component 103 in an unlocked state. When the user wants to adjust the height of the second support frame 105 , firstly, the user has to pull the latch 106 until the holding portion 1061 of the latch 106 collides with the stopper 1101 , thereby simultaneously pulling the flexures 1063 upward. Due to the guidance of the guiding rib 1072, the length of the lateral part of the pulled flexure 1063 can be increased, and due to the restriction of the stopper 1101, the engaging end 1064 will not break away from the engagement of the groove 1083, And maintain the locking component 103 in the unlocked state. Subsequently, in the state where the latch 106 is kept in contact with the stopper 1101 (that is, the unlocked state), the user can drive the second support frame 105 to move vertically relative to the first support frame 104 to shorten or increase the length of the first support frame 104. The distance between the support frame 104 and the second support frame 105 can adjust the height of the second support frame 105 relative to the first support frame 104 . Wherein, when the second support frame 105 is adjusted, the locking component 103 (including the latch element 106 and the spring element 111 ) disposed on the second support frame 105 also moves synchronously.

FIG. 6 shows that the second support frame 105 is adjusted to a height different from that of FIG. 4 . As shown in FIG. 6 , when the second support frame 105 reaches the desired height, the user can release the latch 106 to allow the latch 106 to move in the direction of the first support frame 104 by the action of the spring 111 . As the latch 106 moves down, each flexure 1063 will be simultaneously displaced and elastically deformed by the contact of the guiding rib 1072, thereby pushing the engaging end 1064 to move into and engage with the corresponding groove 1083, so that the locking assembly 103 Restore the locked state. Thereby, the height of the second support frame 105 relative to the first support frame 104 can be locked.

In order to prevent the second support frame 105 from being disconnected from the first support frame 104, the first support frame 104 may also be provided with a limit structure 116, when the second support frame 105 moves upwards, the limit structure 116 can Interfering with the engaging end 1064 prevents the second support frame 105 from being excessively adjusted upward. FIG. 7 is an enlarged schematic diagram illustrating the limit structure 116 provided according to an embodiment of the present invention, which is used to limit the upward adjustment stroke of the second support frame 105 . As shown in FIG. 7 , the limiting structure 116 can be disposed adjacent to the topmost groove 1083A. The limiting structure 116 is made of, for example, a convex rib, which can protrude from the side walls 108E, 108F to the sliding rail 107 respectively (Figure 7 only shows the limiting structure 116 on the side wall 108E, and the other side wall 108F can be symmetrical The same limiting structure 116) is provided. When the locking assembly 103 is in the unlocked state and the second support frame 105 is adjusted upwards, the mutual interference between the stop structure 116 and the engaging end 1064 can prevent the second support frame 105 from moving upwards excessively and surpassing the topmost position. groove 1083A. In this way, it is ensured that the locking assembly 103 can normally perform the locking action within the allowable adjustment range, and the use safety of the backrest portion 102 is increased.

FIG. 8 is a schematic diagram showing the disassembly action of the second support frame 105 and the first support frame 104 . If the user wants to disassemble the second support frame 105 and the first support frame 104 , firstly, the stopper 1101 must be displaced to release its blocking effect on the latch 106 . According to this embodiment, the user can, for example, press the stopper 1101 to make the stopper 1101 deflect away from the moving path of the latching member 106 and no longer block, thereby increasing the upward moving range of the latching member 106 . In this embodiment, since the stopper 1101 is an elastic tongue, the stopper 1101 can release the interference between the stopper 1101 and the pulling part 1061 when it flexes. When the blocking effect of the stopper 1101 is released, the user can drive the latch 106 to move further up to a dismounting position through the stopper 1101, thereby driving the engaging end 1064 to move toward the central area of the sliding rail 107 and Break away from the engaging position of the limiting structure 116 (as shown in dotted line in FIG. 7 ), thus driving the engaging end 1064 to release the interference with the limiting structure 116, so the second support frame 105 can be disassembled at this time . Therefore, the user can easily disassemble the second support frame 105 from the first support frame 104 .

If the user wants to assemble the second support frame 105 and the first support frame 104 , the sliding rail 107 of the second support frame 105 can be inserted into the groove 108 of the first support frame 104 . In this embodiment, as the locking member 106 moves in the direction opposite to the first direction, the engaging end 1064 protruding from the opposite side wall 1074 will collide with an inclined surface 116A on the upper surface of the limiting structure 116 and generate a top. The pushing action causes the engaging end 1064 to move away from the limiting structure 117 , for example, to the central area of the sliding rail 107 , thereby allowing the second supporting frame 105 to move further toward the first supporting frame 104 . When the engaging end 1064 passes over the limiting structure 116, the elasticity of the flexure 1063 makes the engaging end 1064 below the limiting structure 116, so that the engaging end 1064 interferes with the limiting structure 116, that is, the second support is completed. Assembly of the frame 105 and the first support frame 104.

It is worth mentioning that the engaging end portion 1064 and the limiting structure 116 can interfere in different directions. FIG. 9 is a schematic diagram illustrating interference between the engaging end portion 1064 and the limiting structure 116 according to another embodiment of the present invention. A protrusion 1064A can be protruded from the engaging end portion 1064 toward the sidewall 108B of the groove 108 , and the sidewall 108B of the groove 108 can be provided with a limiting structure 117 above the topmost groove 1083A. The limiting structure 117 has the same function as the limiting structure 116 , and can interfere with the engaging end 1064 to prevent the second support frame 105 from detaching from the first support frame 104 . When the engaging end portion 1064 continues to move toward the central area of the sliding rail 107 to break away from the limit of the limiting structure 117 , the second supporting frame 105 can be disassembled from the first supporting frame 104 .

In addition to the interference design between the engaging end portion 1064 and the limiting structure 116 , other interference designs can be adopted in the present invention to prevent the second support frame 105 from detaching from the first support frame 104 during height adjustment. FIG. 10 illustrates another limiting structure adopted by the present invention to prevent the second support frame 105 from detaching from the first support frame 104 . As shown in FIG. 10 , the sliding rail 107 of the second support frame 105 is provided with at least one stopper 1075 protruding toward the side wall 108B of the groove 108 above the engaging end 1064 , and the side wall 108B of the groove 108 A concave portion 1088 is provided at a position corresponding to the limiting member 1075 . According to an embodiment, the limiting member 1075 can be integrally formed with the sliding rail 107 and is in the shape of an elastic hook, wherein the limiting member 1075 can be disposed adjacent to the central area of the sliding rail 107 . When the height of the second supporting frame 105 is adjusted, the limiting member 1075 can move up and down relative to the first supporting frame 104 along the concave portion 1088 . When the second support frame 105 moves upwards and drives the engaging end 1064 to reach or surpass the topmost groove 1083A, the stopper 1075 of the sliding rail 107 can interfere with the topmost stopper structure of the recess 1088 (such as an extended flange) 1088A), thereby preventing the sliding rail 107 of the second support frame 105 from completely detaching from the groove 108 of the first support frame 104 . To separate the second support frame 105 from the first support frame 104 , the limiting member 1075 and the extending flange 1088A of the limiting structure must be released manually. Preferably, the limiting member 1075 is, for example, a plastic elastic hook, the number of which can be adjusted according to actual needs.

Therefore, it can be known from the above that the present invention can provide convenient adjustment operation and quick disassembly and assembly functions through the design of the locking assembly, thus making the use of the child safety seat more convenient. In addition, the design adopted in the present invention can simplify the structure of the locking assembly, so as to reduce the manufacturing cost.

As shown in FIGS. 11 to 13 , the child safety seat 100 of the present invention provides schematic views of three usage states according to the needs of children and parents. As shown in FIG. 11 , this use state is provided for children who need more protection and support. The backrest portion 102 is assembled with the seat portion 101, wherein the backrest portion 102 includes the first support frame 104 and the second support frame 105, wherein the first support frame 104 is a lumbar support for lumbar support, While the second support frame 105 includes a backrest 109 that provides back support, this embodiment preferably further includes a headrest 110 that provides head support, and the joint portion 102A of the backrest portion 102 is connected to the seat portion 101 101A ( FIG. 13 ), the backrest portion 102 is detachably connected to the seat portion 101 .

As shown in Figure 12, a backing plate 104B is assembled between the side wings 104A of the first support frame 104, and a hole 104C is formed in the inner side of the backing plate 104B, and the sliding rail 107 on the second support frame 105 can extend into the The hole 104C is combined with the groove 108 on the first support frame 104 . If children feel uncomfortable due to restricted activities, adults can disassemble the second support frame 105 from the first support frame 104, so that the part of the second support frame 105 provided with the sliding rail 107 and the locking assembly 103 will be locked by the hole 104C. out. On the other hand, after the second support frame 105 is disassembled from the first support frame 104, preferably the cover sheet ( (not shown in the figure) to cover the hole 104C to provide a visually beautiful and comfortable riding experience.

As shown in Figure 13, since the first support frame 104 is detachably combined with the seat part 101, if the child does not want to be restrained, but in order to allow the child to use the safety belt of the car seat safely, the adult can put the first The support frame 104 is disassembled from the seat part 101, and only the seat part 101 is separately provided for the child to sit on, so that the child can be properly restrained by the safety belt of the car to be protected.

The above description is based on multiple different embodiments of the present invention, wherein each feature can be implemented singly or in different combinations. Therefore, the disclosure of the embodiments of the present invention is a specific example to illustrate the principles of the present invention, and the present invention should not be limited to the disclosed embodiments. Furthermore, the foregoing descriptions and accompanying drawings are merely illustrative of the present invention and are not intended to limit it. Changes or combinations of other elements are possible without departing from the spirit and scope of the present invention.

Claims (22)

1. A child safety seat, characterized in that: comprising: a seat portion; and A backrest part is assembled with the seat part, wherein the backrest part includes: a first support frame; A second support frame, wherein the second support frame can be movably combined with the first support frame relative to the first support frame, the second support frame has a slide rail, and the back side of the slide rail is protruded has several guiding ribs; and A locking assembly, including a latching part slidingly assembled on the second support frame, wherein the latching part extends approximately along the second support frame to the first support frame, and the latching part contains two movable Elastically deformable flexures and two engaging ends respectively disposed at the ends of the two flexures, each of the flexures is bent toward the left and right opposite sides of the slide rail, so that each of the engaging ends Can respectively pass through the left and right opposite side walls provided on the slide rail; Wherein, the movement of the locking member to a first direction can drive each of the flexure parts, and each of the flexure parts is simultaneously displaced and elastically deformed by the contact and guidance of the plurality of guiding ribs, so that the extension Because each of the engaging end portions of the opposite side walls moves in a second direction to disengage or engage with the grooves provided in the first supporting frame respectively; When the engaging end is disengaged from the groove, the locking assembly is in an unlocked state, and the second support frame can be displaced relative to the first support frame; When the engaging end is engaged with the groove, the locking component is in a locked state, so that the second supporting frame is fixed on the first supporting frame. 2. The child safety seat as claimed in claim 1, wherein the first direction is substantially perpendicular to the second direction. 3. The child safety seat according to claim 1, wherein the latch further comprises a pull portion and an extension portion, the pull portion is fixed on a first end of the extension portion, each The flexible portion is connected to a second end on the extension portion opposite to the pulling portion, and the latch extends approximately along the length of the second supporting frame to the first supporting frame, wherein the pulling portion is set At a headrest adjacent to the second supporting frame, the extension portion approximately extends along the backrest portion and the slide rail, and each of the flexure portions and each of the engaging end portions is located adjacent to a bottom end of the slide rail. 4 . The child safety seat according to claim 1 , wherein a groove is formed on the first support frame, and the sliding rail is slidably assembled in the groove. 5. The child safety seat according to claim 1, wherein the locking assembly further comprises a spring member, one end of the spring member is disposed on the latch member, and the other end of the spring member is used to abut against the The second supporting frame makes the spring member bias the locking member in the direction opposite to the first direction. 6 . The child safety seat as claimed in claim 5 , wherein the latch member has a boss, and one end of the spring member is sleeved on the boss of the latch member. 7 . 7. The child safety seat according to claim 6, wherein the second support frame has a protruding post, the latch has a limiting slot, and the protruding post passes through the limiting slot for The range of movement of the locking member relative to the second supporting frame is limited, and the other end of the spring member abuts against the boss. 8 . The child safety seat as claimed in claim 7 , wherein a limit screw is provided on the protrusion for interfering with the locking component to prevent the locking component from being disengaged from the protrusion. 9 . 9. The child safety seat according to claim 1, wherein a track is provided on the back of the second support frame, the latch is slidably assembled in the track, and the side edge of the track Several limiting ribs are also provided to prevent the latch from slipping out when sliding. 10. The child safety seat according to claim 1, characterized in that: the first support frame is further provided with a limiting structure, when the locking component is in the unlocked state and the second support frame is relatively When a support frame is adjusted, the limiting structure can interfere with the engaging end to prevent the second support frame from detaching from the first support frame. 11. The child safety seat as claimed in claim 10, wherein a movable stopper is further provided on the second support frame, and when the latch moves to the first direction, the stopper The part is used to interfere with the latching part to limit the movement of the latching part in the first direction. The direction movement releases the interference between the limiting structure and the engaging end, so that the second support frame is separated from the first support frame. 12. The child safety seat as claimed in claim 11, wherein the stopper has an elastic tongue, the elastic tongue is flexibly arranged on the second support frame, and the latch has a pulling part, when the latching part moves to the first direction, the elastic tongue is used to interfere with the pulling part; when the elastic tongue is deflected to release the interference between the elastic tongue and the latch , the locking component is in the unlocked state. 13. The child safety seat according to claim 10, characterized in that: the second support frame is provided with at least one limiter above the engaging end, when the locking component is in the unlocked state And when the second supporting frame is adjusted relative to the first supporting frame, the limiting structure can interfere with the limiting member to prevent the second supporting frame from breaking away from the first supporting frame. 14. The child safety seat as claimed in claim 10, wherein the upper surface of the limiting structure has an inclined surface, and when the locking member moves in the direction opposite to the first direction, the inclined surface is used to push against the first direction. Push the engaging end to move away from the limiting structure. 15. The child safety seat as claimed in claim 10, characterized in that: the second support frame has a limiting member for interfering with an extended flange on the first support frame to prevent the second support frame from The second supporting frame is separated from the first supporting frame. 16. The child safety seat as claimed in claim 1, wherein the second support frame includes a headrest and a backrest. 17. The child safety seat according to claim 16, wherein a pair of first side wings are provided on both sides of the headrest, and a pair of second side wings are provided on both sides of the backrest. 18. The child safety seat as claimed in claim 17, wherein a pair of third side wings are arranged on two sides of the first support frame. 19. The child safety seat as claimed in claim 1, wherein the first support frame is detachably combined with the seat portion. 20. The child safety seat according to claim 19, wherein the first support portion has at least one joint portion, the seat portion has a connecting piece, and the joint portion is connected to the connecting piece. 21. The child safety seat as claimed in claim 20, wherein the engaging portion is a C-shaped buckle, and the connecting member is a rod. 22. The child safety seat as claimed in claim 19, wherein the first support frame is a lumbar support.

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