CN115783020A - Foldable linked frame and baby stroller - Google Patents

Abstract

The invention discloses a linkage foldable vehicle frame and a baby trolley, comprising: a handle mechanism, a front foot mechanism, a rear foot mechanism, a bottom linkage bracket and a linkage rod connected at intervals to the folding joint mechanism of the vehicle frame; The folding joint mechanism and the handle mechanism form a first rotation center; the front foot mechanism and the frame folding joint mechanism are hinged to form a second rotation center; the bottom linkage bracket includes a front hinged to form a third rotation center. The support rod and the rear support rod, the front support rod and the front foot mechanism are hinged to form the fourth rotation center, and the rear foot mechanism and the rear support rod are hinged to form the fifth rotation center; the handle mechanism is provided with an internal The unlocking mechanism drives the frame folding joint mechanism to rotate through the internal unlocking mechanism, so that the frame can be folded around each rotation center, so that the automatic folding of the frame can be realized with one hand, the structure is simple, and the folding is convenient.

Description

Linkageable foldable frame and baby trolley

technical field

The invention relates to the technical field of baby trolleys, in particular to an interlockable foldable carriage and a baby trolley.

Background technique

Baby strollers have become an indispensable product in the growth process of infants and young children. People have higher and higher functional requirements for strollers, especially when they are not in use, they hope that they can be folded to facilitate storage, carrying and travel.

Most of the existing baby carriages are designed as foldable structures, but the folding structure of the current foldable baby carriages is complicated and requires many steps. It is often necessary to fold the armrests, backrests, seats and supporting legs of the baby carriages one by one. It is cumbersome and cannot be folded together at one time, which brings inconvenience.

Contents of the invention

In order to solve the above-mentioned technical problems, the object of the present invention is to provide a linkage-foldable vehicle frame and a baby trolley, so that the automatic linkage folding of the vehicle frame can be realized with one hand, the structure is simple, and the folding is convenient.

In view of this purpose, an embodiment of the present invention provides a linkage-foldable bicycle frame, including: a handle mechanism, a front foot mechanism, a rear foot mechanism, a bottom linkage bracket and a linkage rod connected to the frame folding joint mechanism at intervals; The frame folding joint mechanism and the handle mechanism form a first rotation center; the front foot mechanism and the frame folding joint mechanism are hinged to form a second rotation center; the bottom linkage bracket includes mutual hinges to form a third rotation center A front support rod and a rear support rod in the center, the front support rod and the front foot mechanism are hinged to form a fourth rotation center, and the rear foot mechanism and the rear support rod are hinged to form a fifth rotation center;

One end of the linkage rod is hinged on the side of the frame folding joint mechanism offset from its axis, and the other end of the linkage rod is hinged on the bottom linkage bracket;

An internal unlocking mechanism is arranged in the handle mechanism, and the internal unlocking mechanism drives the frame folding joint mechanism to rotate to fold the frame.

Further, the handle mechanism includes a handle upper rod and a handle lower rod hinged on the handle folding joint assembly, and a handle rod connected to the upper end of the handle upper rod, and the internal unlocking mechanism Set inside the handrail.

Further, the handle folding joint assembly includes a handle folding joint upper cover and a handle folding joint lower cover, and the handle folding joint upper cover is arranged on one side of the handle folding joint lower cover; The handle folding joint upper cover includes an upper half cover body and a support part arranged on the upper half cover body, and the support part is used for supporting on the bottom surface after the vehicle frame is folded.

Further, the internal unlocking mechanism includes a pressing assembly, a first pull cord and a second pull cord, two ends of the pressing assembly are respectively connected to one of the first pull cords, and the first pull cord runs along the two The upper rod of the handle extends downward and engages with the two handle folding joint assemblies, and the two second drawstrings are engaged in the two handle folding joint assemblies and are arranged on the first pull Below the rope, the lower end of the second pull rope is connected to the frame folding joint mechanism.

Further, the frame folding joint mechanism includes a frame joint cover connected to the handle mechanism and a rear joint cover connected to the front foot mechanism and the rear foot mechanism;

The frame joint cover includes a joint cover, a cover connecting body connected to the handle mechanism connected to the joint cover, and a connecting column connected to the seat support rod;

The rear joint cover is provided with a first connecting body and a second connecting body, the first connecting body is hinged to the front foot mechanism; the second connecting body is fixedly connected to the rear foot mechanism; the frame joint The cover body and the handle mechanism are fixed.

Further, the frame joint cover and the rear joint cover are connected by a shaft, a first rotating shaft is arranged at the axis of the frame joint cover, and a joint unlocking shaft is sleeved on the first rotating shaft. Parts, articulation teeth and joint elastic parts, one side of the handle joint cover is provided with a groove structure meshing with the articulation teeth, and the joint unlocking part is fixed on one side of the articulation teeth , the articulation elastic member is arranged on the outer periphery of the articulation tooth.

Further, the handle folding joint assembly includes a bending joint upper cover and a bending joint lower cover, a second rotating shaft is arranged at the center of the bending joint upper cover, and a bending joint is sleeved on the second rotating shaft. An unlocking piece, a bending joint tooth and a joint unlocking rotating part, one side of the bending joint upper cover is provided with a second driving projection connected with the joint unlocking rotating part, and meshingly connected with the bending joint tooth The second groove structure, a limit block is provided on one side of the lower cover of the bending joint, and an outer cover seat is provided on one side of the limit block.

Further, the front end of the bottom linkage bracket is also hinged with a seat support rod, the seat support rod is hinged on the fourth rotation center, and the other end of the seat support rod is hinged on the base bracket.

Further, the base bracket includes a foot rest and a seat part that are rotatably connected, and the side of the seat part is hinged on one side of the joint cover of the vehicle frame through a base support; the base support and the Linkage bar interval setting.

In addition, a baby trolley is provided, including the above-mentioned interlockable foldable carriage.

Beneficial effects of the present invention: The embodiments of the present invention provide a linkageable folding frame and baby trolley, including: a handle mechanism, a front foot mechanism, a rear foot mechanism, a bottom linkage bracket and a linkage Rod; the frame folding joint mechanism and the handle mechanism form a first rotation center; the front foot mechanism and the frame folding joint mechanism are hinged to form a second rotation center; the bottom linkage bracket includes a mutual hinge A front support rod and a rear support rod forming a third rotation center, the front support rod and the front foot mechanism are hinged to form a fourth rotation center, and the rear foot mechanism and the rear support rod are hinged to form a fifth rotation center; The handle mechanism is equipped with an internal unlocking mechanism, which drives the frame folding joint mechanism to rotate so that the frame can be folded around each rotation center, so that the frame can be automatically folded with one hand, and the structure is simple , Easy to fold.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic diagram of the overall structure of a linkage-foldable bicycle frame provided by an embodiment of the present invention;

Fig. 2 is a side view of the overall structure of a linkage-foldable bicycle frame provided by an embodiment of the present invention;

Fig. 3 is a schematic diagram of the internal structure of an internal unlocking assembly of a linkage-foldable frame provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a collapsible and foldable bicycle frame provided by an embodiment of the present invention after being folded;

Fig. 5 is an exploded view of a frame folding joint mechanism that can link and fold a frame provided by an embodiment of the present invention;

Fig. 6 is an exploded view of a handle folding joint assembly of a linkage-foldable bicycle frame provided by an embodiment of the present invention;

Fig. 7 is a schematic diagram of the internal structure of the upper cover of the bending joint of a linkage-foldable frame provided by an embodiment of the present invention;

FIG. 8 is a schematic diagram of the internal structure of a frame joint cover of a frame that can be linked and folded according to an embodiment of the present invention.

In the figure: 1, frame folding joint mechanism; 10, frame joint cover body; 101, joint cover; 102, cover body connecting body; 103, connecting column; 104, first driving bump; groove structure;

11. Rear joint cover; 111. First connecting body; 112. Second connecting body; 12. Shaft; 13. First rotating shaft; 14. Joint unlocking part; 15. Joint rotating tooth; 16. Joint elastic part;

2. The handle mechanism; 20. The internal unlocking mechanism; 201. The pressing component; 202. The first drawstring; 203. The second drawstring;

21. Handle folding joint assembly; 210. Bending unlocking piece; 211. Bending joint upper cover; 212. Bending joint lower cover; 2110. Upper half cover; 2111. Supporting part; 2112. Second rotating shaft; 2113, the second driving bump; 2114, the second groove structure; 213, the bending joint tooth; 214, the joint unlocking rotating part; 215, the limit block; 216, the outer cover seat;

22. Handle up bar; 23. Handle down bar; 24. Hand bar; 3. Front foot mechanism; 4. Rear foot mechanism;

5. Bottom linkage support; 50. Front support rod; 51. Rear support rod;

6. Linkage rod; 7. Seat support rod; 8. Base support; 80. Pedal part; 81. Seat part; 82. Base support member.

A, the first rotation center; B, the second rotation center; C, the third rotation center; D, the fourth rotation center; E, the fifth rotation center.

Detailed ways

An embodiment of the present invention provides a collapsible and foldable vehicle frame and a baby trolley, so that the automatic folding of the vehicle frame can be realized with one hand, the structure is simple, and the folding is convenient.

In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

Embodiment one:

Please refer to Fig. 1. Fig. 1 is a schematic structural diagram of a linkable folding frame provided by an embodiment of the present invention. As shown in Fig. 1 and Fig. 2, a linkable folding frame includes: The handle mechanism 2, the front foot mechanism 3 and the rear foot mechanism 4 on the folding joint mechanism 1; the frame folding joint mechanism 1 and the handle mechanism 2 form the first rotation center A; wherein, the front foot mechanism 3 and the frame folding The joint mechanism 1 is hinged; the hinge point forms a second center of rotation B; the bottom linkage bracket 5 hinged with the front foot mechanism 3 and the rear foot mechanism 4 respectively, and the bottom linkage bracket 5 includes a front bracket rod 50 and a rear bracket rod 51 hinged to each other , the hinge of the front support rod 50 and the rear support rod 51 forms the third center of rotation C, and one end of the linkage rod 6 is hinged at the position where the frame folding joint mechanism 1 deviates from its axis, and the other end of the linkage rod 6 is hinged on On the rear bracket bar 51 of the bottom linkage bracket 5, the hinge of the bottom linkage bracket 5 and the front foot mechanism 3 forms the fourth rotation center D, and the hinge of the rear foot mechanism 4 and the bottom linkage bracket 5 forms the fifth rotation center E. In addition, an internal unlocking mechanism 20 is provided on the armrest of the handle mechanism 2, and the internal unlocking mechanism 20 drives the frame folding joint mechanism 1 to rotate to fold the frame.

In a specific embodiment, by pressing the internal unlocking mechanism 20 upwards, the handle mechanism 2 is folded to drive the frame folding joint mechanism 1 to rotate clockwise along the first rotation center A, and to drive the linkage rod 6 to rotate upward and clockwise. , the linkage rod 6 gives an upward pulling force to the rear support rod 51, so that the front support rod 50 and the rear support rod 51 are bent upward along the third rotation center C, and the bending of the front support rod 50 pulls the front foot mechanism 3 along the third rotation center C. The second rotation center B is bent, and at the same time, the front support rod 50 and the rear support rod 51 are respectively rotated and folded along the fourth rotation center D and the fifth rotation center E, so that the entire vehicle frame can be folded in linkage. The structure is simple and easy to operate. It is convenient and can be operated with one hand.

In addition, the bottom linkage bracket 5 can be used to place idle items, such as vegetable baskets, children's products, and the like.

Further, the handle mechanism 2 includes a handle upper rod 22 and a handle lower rod 23 hinged on the handle folding joint assembly 21, and a handle rod 24 connected to the upper end of the handle upper rod 22 ; The internal unlocking mechanism 20 is set in the handle bar 24 .

In a specific embodiment, as shown in FIG. 1, the handle mechanism 2 includes a handle upper rod 22 and a handle lower rod 23 hinged on the handle folding joint assembly 21, and a handle connected to the handle upper rod The handle bar 24 on the 22 upper end forms the handlebar mechanism 2 of the vehicle frame.

Further, the handle folding joint assembly 21 includes a handle folding joint upper cover 211 and a handle folding joint lower cover 212, and the handle folding joint upper cover 211 is arranged on the handle folding joint lower cover 212; the handle folding joint upper cover 211 includes an upper half cover 2110 and a support part 2111 arranged on the upper half cover 2110, and the support part 2111 is used for folding the vehicle frame supported on the bottom surface.

In a specific embodiment, the handle folding joint upper cover 211 of the handle folding joint assembly 21 is set to be mainly composed of an upper half cover body 2110 and a support part 2111. The shape of the support part 2111 is triangular, and can also be Other shapes can be supported on the bottom surface, so that the baby stroller can stand up, which solves the inconvenience that the general baby stroller can only be placed on the ground after being folded.

Further, the internal unlocking mechanism 20 includes a pressing assembly 201, the two ends of the pressing assembly 201 are respectively connected with a first pull rope 202, and the first pull rope 202 is along the direction of the two upper rods 22 of the handle. It extends downward and engages with the bending unlocking part 210 in the handle folding joint assembly 21. The second drawstring 203 is engaged with the bending unlocking part 210 and is arranged on the first drawstring 202. Below, the lower end of the second pull cord 203 is connected to the joint unlocking part 14 in the frame folding joint mechanism 1 .

In a specific embodiment, the internal unlocking mechanism 20 includes a pressing assembly 201 arranged in the middle of the hand lever 24, and the two ends of the pressing assembly 201 are respectively connected with a first pull cord 202, and the first pull The rope 202 extends downward along the two handle upper rods 22 and engages with the bending unlocking part 210 in the handle folding joint assembly 21; the joint unlocking part 14 is connected to the second drawstring 203, and the first The two pull cords 203 extend upward and are fixedly connected to the joint unlocking rotating member 214 . By pressing the pressing assembly 201 upwards, the first pull cord 202 is driven upwards, and the bending unlocking member 210 is driven to unlock the handle folding joint assembly 21. Two pull cords 203, the second pull cord 203 drives the joint unlocking part 14 to rotate counterclockwise, so that the frame folding joint mechanism 1 is folded clockwise.

Further, as shown in FIG. 5 and FIG. 8, the frame folding joint mechanism 1 includes a frame joint cover 10 connected to the handle mechanism 2 and a frame joint cover 10 connected to the front foot mechanism 3 and the rear foot mechanism 4. Rear joint cover 11;

The frame joint cover 10 includes a joint cover 101, a cover connecting body 102 connected to the handle mechanism 2 connected to the joint cover 101 and a connecting column 103 connected to the seat support rod 7; The joint cover 11 is provided with a first connecting body 111 and a second connecting body 112, the first connecting body 111 is hinged with the front foot mechanism 3; the second connecting body 112 is fixedly connected with the rear foot mechanism 4; The frame joint cover 10 and the handle mechanism 2 are fixed.

In a specific embodiment, by designing the frame joint cover 10 of the frame folding joint mechanism 1 and the rear joint cover 11 connecting the front foot mechanism 3 and the rear foot mechanism 4, the rear joint cover 11 and the frame joint cover 10 has two forms of relative rotation unlocking and relative rotation fixing.

Further, as shown in FIG. 5 , the frame joint cover 10 and the rear joint cover 11 are connected by a shaft 12 , and a first rotating shaft 13 is provided at the axis of the frame joint cover 10 , The first rotating shaft 13 is sleeved with a joint unlocking member 14 , an articulation rotating tooth 15 and a joint elastic member 16 , and one side of the handle joint cover 10 is provided with a first drive connected to the joint unlocking member 14 . The protrusion 104, and the first groove structure 105 engaged with the articulation tooth 15, the joint unlocking part 14 is fixed on one side of the articulation tooth 15, and the joint elastic part 16 is arranged on the Articulate on the outer periphery of tooth 15.

In a specific embodiment, a first rotating shaft 13 is provided at the axis of the frame joint cover 10, and the first rotating shaft 13 is sequentially sleeved with a joint unlocking member 14, a joint rotating tooth, and a direction toward the rear joint cover 11. 15 and the joint elastic part 16, the internal unlocking mechanism 20 pulls the joint unlocking part 14 to rotate, so that the frame folding joint mechanism 1 is unlocked and rotates clockwise, driving the joint rotating tooth 15 to rotate, under the action of the joint elastic part 16 and gravity , the handle mechanism 2 is automatically folded downwards.

Further, as shown in Fig. 6 and Fig. 7, the handle folding joint assembly 21 includes a bending joint upper cover 211 and a bending joint lower cover 212, and the center of the bending joint upper cover 211 is provided with a second Rotating shaft 2112, the second rotating shaft 2112 is covered with the bending unlocking part 210, bending joint teeth 213 and joint unlocking rotating part 214, one side of the bending joint upper cover 211 is provided with the joint The second driving projection 2113 connected to the unlocking rotating member 214, and the second groove structure meshingly connected with the bending joint tooth 213, the side of the bending joint lower cover 212 is provided with a limit block 215, the One side of the limiting block 215 is provided with an outer cover seat 216 .

In a specific embodiment, as shown in Figures 3 and 5, the handle folding joint assembly 21 includes a bending joint upper cover 211 and a bending joint lower cover 212, and the center of the bending joint upper cover 211 is provided with a second Two rotating shafts 2112, the second rotating shaft 2112 is covered with the bending unlocking part 210, the bending joint tooth 213 and the joint unlocking rotating part 214, pulling the first pull rope 202 to give the joint unlocking rotating part 214 an upward When force is applied, the bending joint upper cover 211 is driven to rotate through the second driving projection 2113 and the bending joint tooth 213 is driven to rotate through the second groove structure 2114, so that the handle folding joint assembly 21 rotates counterclockwise.

Further, the front end of the bottom linkage bracket 5 is also hinged with a seat support rod 7 , the seat support rod 7 is hinged on the fourth rotation center D, and the other end of the seat support rod 7 is hinged on the base bracket 8 .

In a specific embodiment, as shown in FIG. 1 , the base bracket 8 is supported by the seat support rod 7 , and rotates and folds around the fourth rotation center D along with the rotation of the front leg mechanism 3 .

Further, the base bracket 8 includes a footrest 80 and a seat 81 that are rotatably connected, and the side of the seat 81 is hinged on one side of the frame joint cover 10 through a base support 82; The base support member 82 is spaced apart from the linkage rod 6 .

In a specific embodiment, the base bracket 8 includes a foot rest 80 and a seat portion 81 that are rotatably connected. The foot rest 80 can be folded by rotating through a rotating shaft. On one side of the frame joint cover 10; with the rotation of the frame folding joint mechanism 1, the base support 82 also rotates, so that the base bracket 8 moves upwards and folds, and the linkage rod 6 is spaced apart Set so that the seat support rod 7 and the linkage rod 6 rotate in the same direction and do not interfere with each other.

To sum up, the embodiment of the present invention provides a linkage-foldable bicycle frame, including: a handle mechanism, a front foot mechanism, a rear foot mechanism, a bottom linkage bracket and a linkage rod connected to the frame folding joint mechanism at intervals; The frame folding joint mechanism and the handle mechanism form a first rotation center; the front foot mechanism and the frame folding joint mechanism are hinged to form a second rotation center; the bottom linkage bracket includes mutual hinges to form a third rotation center The front support rod and the rear support rod in the center, the front support rod and the front foot mechanism are hinged to form the fourth rotation center, and the rear foot mechanism and the rear support rod are hinged to form the fifth rotation center; An internal unlocking mechanism is provided, and the frame folding joint mechanism is driven to rotate through the internal unlocking mechanism so that the frame can be folded around each rotation center, so that the automatic folding of the frame can be realized with one hand, the structure is simple, and the folding is convenient , and can be placed vertically.

Embodiment two:

In addition, a baby trolley is provided, including the above-mentioned interlockable foldable carriage.

In a specific embodiment, the interlockable foldable trolley frame can be applied to any type of baby trolley, and it is enough to equip the baby trolley with other accessories on the basis of the interlockable foldable trolley frame, so that the baby trolley can be used with one hand It can be folded and placed vertically after folding, which is very convenient.

To sum up, the embodiment of the present invention provides a baby trolley, including the interlockable folding frame, which can be driven to fold around each rotation center by pulling the internal unlocking mechanism on the handle mechanism, so that the single The automatic folding of the baby trolley can be realized by hand, the structure is simple, the folding is convenient, and vertical placement can be realized.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions recorded in each embodiment are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A linkageable folding frame, characterized in that it comprises: a handle mechanism (2), a front foot mechanism (3), a rear foot mechanism (4), a bottom linkage bracket (5) and linkage rod (6); said vehicle frame folding joint mechanism (1) and said handle mechanism (2) form a first rotation center; said front foot mechanism (3) and said vehicle frame The folding joint mechanism (1) is hinged to form a second rotation center; the bottom linkage bracket (5) includes a front bracket rod (50) and a rear bracket rod (51) that are hinged to form a third rotation center, and the front bracket rod (50) is hinged with the front foot mechanism (3) to form the fourth center of rotation, and the rear foot mechanism (4) and the rear support rod (51) are hinged to form the fifth center of rotation; one end of the linkage rod (6) Hinged on the side of the frame folding joint mechanism (1) offset from its axis, the other end of the linkage rod (6) is hinged on the bottom linkage bracket (5); The handle mechanism (2) is provided with an internal unlocking mechanism (20), and the internal unlocking mechanism (20) drives the vehicle frame folding joint mechanism (1) to rotate to fold the vehicle frame. 2. The linkageable folding vehicle frame according to claim 1, characterized in that, the handle mechanism (2) includes a handle upper rod (22) hinged on the handle folding joint assembly (21) and a handle The lower rod (23) and the handle bar (24) connected to the upper end of the handle upper rod (22), the internal unlocking mechanism (20) are arranged in the handle bar (24). 3. The linked and foldable bicycle frame according to claim 2, characterized in that, the handle folding joint assembly (21) comprises a handle folding joint upper cover (211) and a handle folding joint lower cover ( 212), the handle folding joint upper cover (211) is arranged on one side of the handle folding joint lower cover (212); the handle folding joint upper cover (211) includes an upper half cover (2110 ), a support portion (2111) arranged on the upper half cover (2110), and the support portion (2111) is used to support on the bottom surface after folding the vehicle frame. 4. The interlockable foldable vehicle frame according to claim 2, characterized in that, the internal unlocking mechanism (20) comprises a pressing component (201), a first pull cord (202) and a second pull cord (203), Both ends of the pressing assembly (201) are respectively connected to a first pull cord (202), and the first pull cord (202) extends downward along the handle bar (22) and connects with the The handle folding joint assembly (21) is clipped, and the second pull cord (203) is clipped in the handle folding joint assembly (21) and arranged at the end of the first pull cord (202). Below, the lower end of the second pull rope (203) is connected with the frame folding joint mechanism (1). 5. The linkageable folding frame according to claim 1, characterized in that, the frame folding joint mechanism (1) comprises a frame joint cover (10) connected to the handle mechanism (2) and a rear joint cover (11) connecting the front foot mechanism (3) and the rear foot mechanism (4); The frame joint cover (10) includes a joint cover (101), a cover connecting body (102) connected to the joint cover (101) and the handle mechanism (2) and a seat support rod (7) connecting column (103) for connection; The rear joint cover (11) is provided with a first connecting body (111) and a second connecting body (112), and the first connecting body (111) is hinged to the front foot mechanism (3); the second The connecting body (112) is fixed to the rear foot mechanism (4); the frame joint cover (10) is fixed to the handle mechanism (2). 6. The linkageable folding vehicle frame according to claim 5, characterized in that, the frame joint cover (10) and the rear joint cover (11) are connected by a shaft (12), and the vehicle The axis of the frame joint cover (10) is provided with a first rotating shaft (13), and the first rotating shaft (13) is sleeved with a joint unlocking member (14), a joint rotating tooth (15) and a joint elastic member ( 16), one side of the handle joint cover (10) is provided with a first driving projection (104) connected to the joint unlocking part (14), and a first driving protrusion (104) meshing with the joint rotation tooth (15). A groove structure (105), the joint unlocking part (14) is fixed on one side of the joint rotation tooth (15), and the joint elastic part (16) is arranged on the joint rotation tooth (15). 7. The linkageable folding bicycle frame according to claim 2, characterized in that, the handle folding joint assembly (21) comprises a bending joint upper cover (211) and a bending joint lower cover (212), the The center of the bending joint upper cover (211) is provided with a second rotating shaft (2112), and the second rotating shaft (2112) is provided with a bending unlocking piece (210), bending joint teeth (213) and joint unlocking Rotating member (214), one side of the bending joint upper cover (211) is provided with a second driving projection (2113) connected with the joint unlocking rotating member (214), and the bending joint tooth (213) The second groove structure (2114) is engaged and connected. One side of the bending joint lower cover (212) is provided with a limit block (215), and one side of the limit block (215) is provided with an outer Cover seat (216). 8. The linkageable folding vehicle frame according to claim 5, characterized in that, the bottom linkage bracket (5) is also hinged with the seat support rod (7), and the other end of the seat support rod (7) Hinged on the base bracket (8). 9. The interlockable folding vehicle frame according to claim 8, characterized in that, the base bracket (8) comprises a foot rest (80) and a seat portion (81) which are rotatably connected, and the seat portion (81) The side is hinged on one side of the vehicle frame joint cover (10). 10. A baby trolley, comprising the interlockable foldable carriage according to any one of claims 1-9.

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