Foldable frame of buggy

Abstract

The utility model relates to the technical field of buggies, and discloses a foldable frame of a buggy, which comprises a front foot group, a rear foot group and a handle group, a first locking piece is arranged between the handle group and the rear foot group, and a second locking piece is arranged between the rear foot group and the front foot group; a third locking piece is arranged between the first seat group and the front foot group; a fourth locking piece is arranged between the second seat group and the first seat group; an unlocking piece is arranged on the handle group; when the frame is in an unfolded state, the unlocking piece is operated, the first locking piece can be unlocked, the handle set can rotate, the handle set rotates to unlock the second locking piece and the fourth locking piece, at the moment, the second seat set can rotate, and the third locking piece can be unlocked through rotation of the second seat set. The front foot set, the rear foot set, the handle set, the first seat set and the second seat set can be drawn close downwards, and the frame is switched to a folded state. The foldable baby carriage has the advantages that the carriage frame is convenient to fold, the volume is small after the carriage frame is folded, the occupied space is small, and the structural stability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of baby carriages, in particular to a foldable frame of a baby carriage. Background Art

[0002] A stroller is one of the essential tools for traveling with children. When going out, placing the child in the stroller and dragging or pushing the child can effectively save the adult's energy and the child's comfort is also high.

[0003] The frame is the core part of the baby stroller, and the baby stroller relies on the frame to support the overall weight of the child. In order to reduce the volume of the baby stroller when not in use and to make it more convenient to carry and store, the frame of the baby stroller is set to be foldable. In the existing foldable baby strollers, the frame is difficult to fold and still occupies a large space after folding. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a foldable frame which is easy to fold, has a small volume after folding, occupies little space, and has good structural stability.

[0005] The utility model solves the technical problem by adopting a technical solution of providing a foldable frame of a baby carriage, comprising:

[0006] A front foot group, a rear foot group and a handle group, wherein the front foot group and the rear foot group are rotatably connected, and wheels are provided at the bottom of both; the handle group and the rear foot group are rotatably connected, and a first locking member is provided between the handle group and the rear foot group, and a second locking member is provided between the rear foot group and the front foot group;

[0007] A first seat group and a second seat group, wherein the first seat group is rotatably connected to the front foot group, and a third locking member is provided between the first seat group and the front foot group; the second seat group is rotatably connected to the first seat group, and a fourth locking member is provided between the second seat group and the first seat group;

[0008] The handlebar assembly is provided with an unlocking member, and the frame has an unfolded state and a folded state;

[0009] When the frame is in the unfolded state, the unlocking member is operated to unlock the first locking member, so that the handlebar group can be rotated, and the rotation of the handlebar group can unlock the second locking member and the fourth locking member. At this time, the second seat group can be rotated, and the rotation of the second seat group can unlock the third locking member, and the front foot group, rear foot group, handlebar group, first seat group and second seat group can all be moved together downward to switch the frame to the folded state.

[0010] Furthermore, the handle assembly is provided with an unlocking module, and the unlocking module is connected to the fourth locking member;

[0011] When the first locking member is unlocked and the handle assembly is rotated downward by a preset angle, the handle assembly unlocks the fourth locking member through the unlocking module.

[0012] Further, the unlocking module includes a rotating piece and a rotating bracket;

[0013] The handle assembly extends a boss toward the second seat assembly side, the rotating plate is sleeved on the boss and rotates synchronously with the boss; the rotating bracket is sleeved on the boss, and when the handle assembly drives the rotating plate to rotate synchronously by a preset angle, the rotating plate can drive the rotating bracket to rotate to unlock the fourth locking member.

[0014] Furthermore, the rotating piece is provided with an arc-shaped groove, the rotating bracket is provided with a convex block, and the convex block extends into the arc-shaped groove;

[0015] When the rotating piece rotates until the end surface of the arc-shaped groove abuts against the protrusion, the rotating piece can drive the rotating bracket to rotate.

[0016] Furthermore, the unlocking module further includes a first pull wire, a first spring and a connecting slider;

[0017] The fourth locking member is provided with a slide groove, and the connecting slider is slidably arranged in the slide groove; one end of the first pull wire is connected to the rotating bracket, and the other end of the first pull wire is connected to the connecting slider; the first spring is sleeved on the first pull wire and is located between the connecting slider and the locking member;

[0018] When the rotating bracket rotates to make the connecting slider slide to the end close to the sliding slot and compress the first spring, the rotating bracket continues to rotate to drive the fourth locking member to unlock.

[0019] Furthermore, a second spring is provided between the fourth locking member and the second seat group, and the elastic force of the second spring causes the fourth locking member to have a tendency to keep moving in its locking direction.

[0020] Furthermore, a plurality of pulleys are provided on the second seat group, and the first pull wire is wound between the plurality of pulleys.

[0021] Furthermore, a plurality of first unlocking blocks are extended from the second seat group toward the first seat group, and the first unlocking blocks are provided with a first inclined wall; a second inclined wall is provided on the third locking member, and the first inclined wall and the second inclined wall are movably attached to each other;

[0022] The first unlocking block can press the second inclined wall through the first inclined wall to unlock the third locking member and disengage it from between the first seat group and the front foot group;

[0023] A third spring is provided between the third locking member and the front leg group.

[0024] Furthermore, the handle assembly is provided with a plurality of second unlocking blocks, and the second unlocking blocks are provided with a third inclined wall; the second locking member is provided with a fourth inclined wall, and the third inclined wall and the fourth inclined wall are movably attached to each other;

[0025] The second unlocking block may push the fourth inclined wall through the third inclined wall, so that the second locking member is unlocked and disengaged from between the front foot group and the rear foot group;

[0026] A fourth spring is provided between the second locking member and the front leg group.

[0027] Furthermore, an unlocking wheel is provided between the rear foot group and the first locking member, and a fifth inclined wall is provided on the unlocking wheel; a sixth inclined wall is provided on the first locking member, and the fifth inclined wall and the sixth inclined wall are movably attached to each other;

[0028] The unlocking member and the unlocking wheel are connected via a second pull wire, and the unlocking member can be operated so that the unlocking member can pull the unlocking wheel via the second pull wire, and the unlocking wheel can push the sixth inclined wall via the fifth inclined wall, so that the first locking member is unlocked and separated from between the handle assembly and the rear foot assembly;

[0029] A fifth spring is provided between the first locking member and the handle assembly.

[0030] Compared with the prior art, the utility model has at least the following beneficial effects:

[0031] In the utility model, after operating the unlocking piece on the handlebar group, the first locking piece can be unlocked, and the handlebar group can rotate freely. When the handlebar group is rotated to a certain angle, the second locking piece and the fourth locking piece can be unlocked, and the second seat group can be rotated downward, and the third locking piece can be unlocked when rotating. At this time, all four locking pieces are unlocked, and the rotation lock between the handlebar group, the front foot group, the rear foot group, the first seat group and the second seat group is released. The frame is lifted, and under the action of gravity, the five members move downward to each other, that is, the folding of the frame is completed, and the folding of the frame can be realized with one button. The folding operation is simple, and the volume of the folded frame is small, the space occupied is small, and the overall stability of the frame is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the frame of the children's vehicle of the utility model (in an unfolded state);

[0033] Figure 2 It is a side view of the frame;

[0034] Figure 3 It is a structural schematic diagram when the frame is in a folded state;

[0035] Figure 4 for Figure 1 Schematic diagram of local decomposition at A in the middle;

[0036] Figure 5 It is a structural diagram of the joint of the handlebar assembly;

[0037] Figure 6 is a schematic structural diagram of a third locking member;

[0038] Figure 7 is a schematic structural diagram of a second locking member;

[0039] Figure 8 It is a schematic diagram of the structure of the unlocking wheel;

[0040] Fig. 9 It is a schematic structural diagram of the first locking member.

[0041] In the figure:

[0042] 1. Handle assembly; 1A. convex column; 1B. second unlocking block; 10. first locking member; 101. sixth inclined wall; 11. unlocking member; 111. second pull wire; 12. rotating piece; 120. arc groove; 13. rotating bracket; 130. convex block; 14. first pull wire; 15. second spring; 16. connecting slider; 17. third inclined wall; 18. unlocking wheel; 181. fifth inclined wall; 19. fifth spring;

[0043] 2. front foot assembly; 20. second locking member; 201. fourth inclined wall; 21. fourth spring;

[0044] 3. Rear foot group;

[0045] 4. first seat group; 40. third locking member; 401. second inclined wall; 41. third spring;

[0046] 5. Second seat group; 50. Fourth locking member; 501. Slide groove; 51. Second spring; 52. Pulley; 53. First unlocking block; 531. First inclined wall. DETAILED DESCRIPTION

[0047] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0048] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0052] like Figure 1-Figure 4 As shown, a foldable frame of a baby stroller mainly comprises: a front leg group 2, a rear leg group 3, a handlebar group 1, a first seat group 4 and a second seat group 5. The frame has an unfolded state (such as Figure 1 and Figure 2 as shown) and folded state (as shown Figure 3 As shown in the figure, the frame can be switched between an unfolded state and a folded state. In normal use, the frame is in the unfolded state; when not in use, the frame can be switched to the folded state to reduce the space it occupies.

[0053] The front foot group 2 and the rear foot group 3 are rotatably connected, and wheels are provided at the bottom of both. Preferably, the wheels on the front foot group 2 are universal wheels, and the wheels on the rear foot group 3 are wheels that can move forward and backward. The handlebar group 1 is rotatably connected to the rear foot group 3, and a first locking member 10 is provided between the handlebar group 1 and the rear foot group 3. When the first locking member 10 is in a locked state, the first locking member 10 is located between the handlebar group 1 and the rear foot group 3, and the first locking member 10 limits the relative rotation between the handlebar group 1 and the rear foot group 3. When the first locking member 10 is unlocked, the first locking member 10 is disengaged from between the handlebar group 1 and the rear foot group 3, and the handlebar group 1 can rotate relative to the rear foot group 3.

[0054] A second locking member 20 is provided between the rear foot group 3 and the front foot group 2. When the second locking member 20 is in a locked state, the second locking member 20 is located between the rear foot group 3 and the front foot group 2, and the second locking member 20 restricts the relative rotation between the rear foot group 3 and the front foot group 2. When the second locking member 20 is unlocked, the second locking member 20 is disengaged from between the rear foot group 3 and the front foot group 2, and the rear foot group 3 and the front foot group 2 can rotate relative to each other.

[0055] The first seat group 4 is rotatably connected to the front foot group 2, and a third locking member 40 is provided between the first seat group 4 and the front foot group 2. When the third locking member 40 is in a locked state, the third locking member 40 is located between the first seat group 4 and the front foot group 2, and the third locking member 40 limits the relative rotation between the first seat group 4 and the front foot group 2. When the third locking member 40 is unlocked, the third locking member 40 is disengaged from the first seat group 4 and the front foot group 2, and the first seat group 4 and the front foot group 2 can rotate relative to each other. The second seat group 5 is rotatably connected to the first seat group 4, and a fourth locking member 50 is provided between the second seat group 5 and the first seat group 4. When the fourth locking member 50 is in a locked state, the fourth locking member 50 is located between the second seat group 5 and the first seat group 4, and the relative rotation between the second seat group 5 and the first seat group 4 is limited. When the fourth locking member 50 is in the unlocked state, the fourth locking member 50 is disengaged from between the second seat group 5 and the first seat group 4, and the second seat group 5 and the first seat group 4 can rotate relative to each other. In this embodiment, the first seat group 4 is preferably a front seat group, the second seat group 5 is preferably a rear seat group, and the first locking member 10, the second locking member 20 and the third locking member 40 are preferably locking gears.

[0056] The handlebar assembly 1 is provided with an unlocking member 11, and the unlocking member 11 of this embodiment is preferably an unlocking handle. When the bicycle frame is in the unfolded state, the user operates the unlocking member 11 (specifically, hand-pull the unlocking member 11) to unlock the first locking member 10, so that the handlebar assembly 1 can rotate, and after the handlebar assembly 1 rotates downward to a certain angle, the second locking member 20 and the fourth locking member 50 can be unlocked, and the second seat assembly 5 can be rotated at this time, and after the second seat assembly 5 rotates downward to a certain angle, the third locking member 40 can be unlocked, so far, the rotational freedom of the front foot assembly 2, the rear foot assembly 3, the handlebar assembly 1, the first seat assembly 4 and the second seat assembly 5 is released, and the five can be moved together downward to switch the bicycle frame to the folded state.

[0057] In actual use, in this embodiment, by operating the unlocking piece 11 on the handlebar group 1, the first locking piece 10 can be unlocked, and the handlebar group 1 can rotate freely. When the handlebar group 1 is rotated to a certain angle, the second locking piece 20 and the fourth locking piece 50 can be unlocked, and the second seat group 5 will rotate downward, and the third locking piece 40 will be unlocked during the rotation. At this time, all four locking pieces are unlocked, and the rotation lock between the handlebar group 1, the front foot group 2, the rear foot group 3, the first seat group 4 and the second seat group 5 is released. The frame is lifted, and under the action of gravity, the five members move downward to each other, and the folding of the frame is completed. The one-button folding of the frame can be achieved, and the folding operation is simple. The folded frame is small in size and occupies little space, and the overall stability of the frame is good.

[0058] Specifically, combined Figure 4-Figure 5 and Figure 8-Figure 9 As shown, in this embodiment, an unlocking wheel 18 is provided between the rear foot group 3 and the first locking member 10. The unlocking wheel 18 is sleeved on the boss 1A of the handlebar group 1 joint and can rotate relative to the boss 1A. A fifth inclined wall 181 is provided on the unlocking wheel 18, and a sixth inclined wall 101 is provided on the first locking member 10. The sixth inclined wall 101 and the fifth inclined wall 181 have the same inclination direction, and the fifth inclined wall 181 and the sixth inclined wall 101 are movably attached to each other. The unlocking member 11 and the unlocking wheel 18 are connected by a second pull wire 111, that is, one end of the second pull wire 111 is connected to the unlocking member 11, and the other end is connected to the unlocking wheel 18. The unlocking member 11 can drive the unlocking wheel 18 to rotate. When in use, the unlocking member 11 is pulled, and the unlocking member 11 can pull the unlocking wheel 18 through the second pull line 111, so that the unlocking wheel 18 rotates, and the unlocking wheel 18 can push the sixth inclined wall 101 through the fifth inclined wall 181, so that the first locking member 10 moves toward the handlebar assembly 1, and then the first locking member 10 is unlocked and separated from the handlebar assembly 1 and the rear foot assembly 3, and the handlebar assembly 1 can rotate freely. Among them, a fifth spring 19 is provided between the first locking member 10 and the handlebar assembly 1, and the elastic force of the fifth spring 19 makes the first locking member 10 have a tendency to keep moving toward the rear foot assembly 3, and can drive the first locking member 10 to reset after the first locking member 10 is unlocked.

[0059] like Figure 4-Figure 5 and Figure 7 As shown, the handlebar assembly 1 (specifically, the joint of the handlebar assembly 1) of this embodiment is provided with a plurality of second unlocking blocks 1B, and the second unlocking blocks 1B are provided with a third inclined wall 17; the second locking member 20 is provided with a fourth inclined wall 201, and the third inclined wall 17 and the fourth inclined wall 201 are movably attached. When in use, when the handlebar assembly 1 is unlocked and rotated downward, the second unlocking block 1B can push the fourth inclined wall 201 through the third inclined wall 17, so that the second locking member 20 moves toward the front foot assembly 2, thereby unlocking the second locking member 20, disengaging the second locking member 20 from between the front foot assembly 2 and the rear foot assembly 3, and the front foot assembly 2 and the rear foot assembly 3 can rotate relative to each other. Among them, a fourth spring 21 is provided between the second locking member 20 and the front foot assembly 2, and the elastic force of the fourth spring 21 makes the second locking member 20 have a tendency to keep moving toward the rear foot side, and after the second locking member 20 is locked, the second locking member 20 can be driven to reset.

[0060] Specifically, Figure 4 and Figure 6 As shown, the handlebar assembly 1 of this embodiment is provided with an unlocking module, and the unlocking module is connected to the fourth locking member 50. When the first locking member 10 is unlocked, the handlebar assembly 1 is rotated downward by a preset angle, and the handlebar assembly 1 can unlock the fourth locking member 50 through the unlocking module. Among them, the unlocking module mainly includes: a rotating piece 12, a rotating bracket 13, a first pull line 14, a first spring and a connecting slider 16. The handlebar assembly 1 extends a boss 1A to the side of the second seat group 5, and the rotating piece 12 is sleeved on the boss 1A and rotates synchronously with the boss 1A, specifically, the rotating piece 12 and the boss 1A are splined. The rotating bracket 13 is sleeved on the boss 1A. When the handlebar assembly 1 drives the rotating piece 12 to rotate synchronously by a preset angle, the rotating piece 12 can drive the rotating bracket 13 to rotate to unlock the fourth locking member 50.

[0061] It should be explained that an arc groove 120 is provided on the outer periphery of the rotating piece 12, and a protrusion 130 is provided on the rotating bracket 13. The protrusion 130 extends into the arc groove 120, and the total length of the arc groove 120 is greater than the protrusion 130. When the rotating piece 12 rotates until the end surface of the arc groove 120 abuts against the protrusion 130, the rotating piece 12 can drive the rotating bracket 13 to rotate. When in use, when the handle assembly 1 rotates, the rotating piece 12 is driven to rotate by the protrusion 1A at the beginning, the relative position of the protrusion 130 in the arc groove 120 changes, but the rotating bracket 13 does not rotate. Only when the handle assembly 1 continues to rotate and the end of the arc groove 120 abuts against the protrusion 130, the rotation of the handle assembly 1 will drive the rotating bracket 13 to rotate.

[0062] Further, a slide groove 501 is provided on the fourth locking member 50, and the connecting slider 16 is slidably arranged in the slide groove 501. One end of the first pull wire 14 is connected to the rotating bracket 13, and the other end of the first pull wire 14 is connected to the connecting slider 16 after passing through a plurality of pulleys 52, and the plurality of pulleys 52 are arranged on the second seat group 5. The first spring is sleeved on the first pull wire 14 and is located between the connecting slider 16 and the locking member. When the rotating bracket 13 rotates, the connecting slider 16 slides to the end close to the slide groove 501 and compresses the first spring, the rotating bracket 13 continues to rotate to drive the fourth locking member 50 to unlock. The first spring is provided, and the connecting slider 16 is slidably arranged in the slide groove 501 of the fourth locking member 50. Under the action of the first spring, the connecting slider 16 has a buffer stroke in the slide groove 501, which can ensure that the fourth locking member 50 will not be locked by mistake during use, that is, as long as there is a child in the baby carriage, the fourth locking member 50 will not be locked by mistake.

[0063] A second spring 5115 is provided between the fourth locking member 50 and the second seat group 5. The elastic force of the second spring 5115 causes the fourth locking member 50 to maintain a tendency to move in its locking direction, and after the fourth locking member 50 is unlocked, the second spring 5115 can drive the fourth locking member 50 to reset.

[0064] Specifically, a plurality of first unlocking blocks 53 are extended from the second seat group 5 toward the first seat group 4, and the first unlocking blocks 53 are provided with a first inclined wall 531; the third locking member 40 is provided with a second inclined wall 401, and the first inclined wall 531 is movably attached to the second inclined wall 401. When in use, when the second seat group 5 rotates downward, the first unlocking block 53 can press the second inclined wall 401 through the first inclined wall 531, so that the third locking member 40 moves toward the front foot group 2, thereby unlocking the third locking member 40 and disengaging from between the first seat group 4 and the front foot group 2, so that the first seat group 4 and the front foot group 2 can rotate relative to each other. Among them, a third spring 41 is provided between the third locking member 40 and the front foot group 2, and the elastic force of the third spring 41 makes the third locking member 40 have a tendency to move toward the first seat group 4, and after the third locking member 40 is unlocked, the third locking member 40 can be driven to reset.

[0065] During use, the frame is in the unfolded state. When the frame needs to be folded, the unlocking member 11 is pulled, and the unlocking member 11 pulls the unlocking wheel 18 through the second pull wire 111, so that the unlocking wheel 18 rotates; the unlocking wheel 18 pushes the first locking member 10, so that the first locking member 10 moves toward the handlebar group 1 side, thereby unlocking the first locking member 10, and the handlebar group 1 can be rotated; when the handlebar group 1 is rotated downward by a certain angle, the second unlocking block 1B on the handlebar group 1 pushes the second locking member 20, so that the second locking member 20 moves axially, and the second locking member 20 is unlocked, and during the rotation of the handle, the rotating bracket 13 is driven to rotate through the rotating sheet 12, and the rotating bracket 13 pulls the first pull wire 14, and the first pull wire 14 pulls the connecting slider 16, the connecting slider 16 drives the fourth locking member 50 to retract, and the fourth locking member 50 is unlocked, that is, the second locking member 20 and the fourth locking member 50 are both unlocked; the second seat group 5 will fall down (that is, rotate downward) under the action of gravity, and the first unlocking block 53 on the second seat group 5 pushes the third unlocking member 11, so that the third unlocking member 11 moves axially, and then the third unlocking member 11 is unlocked. At this point, the rotation lock among the handlebar group 1, the front foot group 2, the rear foot group 3, the first seat group 4 and the second seat group 5 is released, and the operator lifts the frame. Under the action of gravity, the five members move downward to each other, that is, the folding of the frame is completed, and the vehicle can be folded with one button.

Claims

1. A foldable frame of a children's vehicle, characterized in that: include: A front foot group, a rear foot group and a handle group, wherein the front foot group and the rear foot group are rotatably connected, and wheels are provided at the bottom of both; the handle group and the rear foot group are rotatably connected, and a first locking member is provided between the handle group and the rear foot group, and a second locking member is provided between the rear foot group and the front foot group; A first seat group and a second seat group, wherein the first seat group is rotatably connected to the front foot group, and a third locking member is provided between the first seat group and the front foot group; the second seat group is rotatably connected to the first seat group, and a fourth locking member is provided between the second seat group and the first seat group; The handlebar assembly is provided with an unlocking member, and the frame has an unfolded state and a folded state; When the frame is in the unfolded state, the unlocking member is operated to unlock the first locking member, so that the handlebar group can be rotated, and the rotation of the handlebar group can unlock the second locking member and the fourth locking member. At this time, the second seat group can be rotated, and the rotation of the second seat group can unlock the third locking member, and the front foot group, rear foot group, handlebar group, first seat group and second seat group can all be moved together downward to switch the frame to the folded state.

2. The foldable frame of a children's vehicle according to claim 1, characterized in that: The handle assembly is provided with an unlocking module, and the unlocking module is connected to the fourth locking member; When the first locking member is unlocked and the handle assembly is rotated downward by a preset angle, the handle assembly unlocks the fourth locking member through the unlocking module.

3. The foldable frame of a children's vehicle according to claim 2, characterized in that: The unlocking module includes a rotating piece and a rotating bracket; The handle assembly extends a boss toward the second seat assembly side, the rotating plate is sleeved on the boss and rotates synchronously with the boss; the rotating bracket is sleeved on the boss, and when the handle assembly drives the rotating plate to rotate synchronously by a preset angle, the rotating plate can drive the rotating bracket to rotate to unlock the fourth locking member.

4. The foldable frame of a children's vehicle according to claim 3, characterized in that: The rotating piece is provided with an arc-shaped groove, and the rotating bracket is provided with a convex block, and the convex block extends into the arc-shaped groove; When the rotating piece rotates until the end surface of the arc-shaped groove abuts against the protrusion, the rotating piece can drive the rotating bracket to rotate.

5. The foldable frame of a baby carriage according to claim 3 or 4, characterized in that: The unlocking module also includes a first pull wire, a first spring and a connecting slider; The fourth locking member is provided with a slide groove, and the connecting slider is slidably arranged in the slide groove; one end of the first pull wire is connected to the rotating bracket, and the other end of the first pull wire is connected to the connecting slider; the first spring is sleeved on the first pull wire and is located between the connecting slider and the locking member; When the rotating bracket rotates to make the connecting slider slide to the end close to the sliding slot and compress the first spring, the rotating bracket continues to rotate to drive the fourth locking member to unlock.

6. The foldable frame of a children's vehicle according to claim 1, characterized in that: A second spring is provided between the fourth locking member and the second seat group, and the elastic force of the second spring causes the fourth locking member to have a tendency to keep moving in its locking direction.

7. The foldable frame of a children's vehicle according to claim 5, characterized in that: The second seat group is provided with a plurality of pulleys, and the first pull wire is wound between the plurality of pulleys.

8. The foldable frame of a children's vehicle according to claim 1, characterized in that: A plurality of first unlocking blocks extend from the second seat group toward the first seat group, and the first unlocking blocks have a first inclined wall; a second inclined wall is provided on the third locking member, and the first inclined wall and the second inclined wall are movably attached to each other; The first unlocking block can press the second inclined wall through the first inclined wall to unlock the third locking member and disengage it from between the first seat group and the front foot group; A third spring is provided between the third locking member and the front leg group.

9. The foldable frame of a children's vehicle according to claim 1, characterized in that: The handle assembly is provided with a plurality of second unlocking blocks, and the second unlocking blocks are provided with a third inclined wall; the second locking member is provided with a fourth inclined wall, and the third inclined wall and the fourth inclined wall are movably attached to each other; The second unlocking block may push the fourth inclined wall through the third inclined wall, so that the second locking member is unlocked and disengaged from between the front foot group and the rear foot group; A fourth spring is provided between the second locking member and the front leg group.

10. The foldable frame of a children's vehicle according to claim 1, characterized in that: An unlocking wheel is provided between the rear foot group and the first locking member, and a fifth inclined wall is provided on the unlocking wheel; a sixth inclined wall is provided on the first locking member, and the fifth inclined wall and the sixth inclined wall are movably attached to each other; The unlocking member and the unlocking wheel are connected via a second pull wire, and the unlocking member can be operated so that the unlocking member can pull the unlocking wheel via the second pull wire, and the unlocking wheel can push the sixth inclined wall via the fifth inclined wall, so that the first locking member is unlocked and separated from between the handle assembly and the rear foot assembly; A fifth spring is provided between the first locking member and the handle assembly.

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