CN221162952U

CN221162952U - Folding structure of handcart

Info

Publication number: CN221162952U
Application number: CN202323262453.5U
Authority: CN
Inventors: 张发辉
Original assignee: Zhongshan Tongxin Daily Products Co ltd
Current assignee: Zhongshan Tongxin Daily Products Co ltd
Priority date: 2023-11-30
Filing date: 2023-11-30
Publication date: 2024-06-18
Anticipated expiration: 2033-11-30

Abstract

The utility model discloses a folding structure of a handcart, which comprises a framework, a front leg support, a rear leg support, a handle support, a seat support and a connecting rod assembly which is rotationally connected with the front leg support, the handle support and the framework, wherein the upper part of the front leg support and the lower part of the handle support are rotationally connected with the framework so that the front leg support is driven to rotate downwards together by the connecting rod assembly when the handle support rotates downwards; the upper part of the rear leg support is fixed on the framework, the seat support is rotationally connected on the framework, the front leg support or/and the handle support are provided with stepped holes, the surface of the step of each stepped hole is provided with a guide inclined plane, the guide inclined plane is connected with a seat locking piece, and the seat locking piece is in a locking state and an unlocking state; by adopting the structure, a user can fold the handle support, the front leg support and the seat support simultaneously only by rotating the handle support, and the folding effect of small volume, convenient storage and transportation is realized.

Description

Folding structure of handcart

Technical Field

The utility model relates to the technical field of trolleys, in particular to a folding structure which is convenient to store and transport and can realize smaller volume after the trolley is folded.

Background

In order to facilitate transportation, storage and carrying of the child stroller, most child strollers are foldable structures, but existing folding structures and operations are complex, for example, the invention patent with publication number of CN114604307a discloses a child stroller, and the folding structures need to fold push rods, front legs, rear legs and seats one by one when the child stroller is folded, so that the child stroller is complicated in structure and cannot be folded at one time.

Therefore, a folding structure capable of being folded quickly is proposed.

Disclosure of utility model

In view of the above, an object of the present utility model is to provide a folding structure of a cart, which can fold by rotating a handle bracket downward with a front leg bracket.

The utility model provides a folding structure of a handcart, which aims at solving the technical problems, and comprises a framework, a front leg support, a rear leg support, a handle support, a seat support and a connecting rod assembly which is rotationally connected with the front leg support, the handle support and the framework, wherein the upper part of the front leg support and the lower part of the handle support are rotationally connected with the framework so that the front leg support is driven to rotate downwards together by the connecting rod assembly when the handle support rotates downwards;

The upper portion of back leg support is fixed on the skeleton, the seat support rotates and connects on the skeleton, preceding leg support or/and handle support are equipped with the shoulder hole, the surface of the step department of shoulder hole is equipped with the direction inclined plane, the direction inclined plane is connected with the seat locking piece, the seat locking piece has locking state and unblock state, when being located locking state, the seat locking piece passes the shoulder hole and the skeleton inserts the seat support in order to lock the rotation of seat support, current leg support rotates downwards so that the seat locking piece removes to unblock state along the direction inclined plane, the seat locking piece breaks away from the seat support in order to resume the rotation of seat support, be equipped with on the skeleton and can drive the laminating of seat locking piece at the first piece that resets of direction inclined plane.

As a further improvement of the utility model, the framework is provided with a framework groove which can be used for placing the handle locking piece and can be used for moving the handle locking piece up and down, the handle support is provided with a safety bump, the handle locking piece is provided with a limiting block, the handle locking piece is provided with a locking position and an unlocking position, when the handle locking piece moves to the locking position, the safety bump is abutted against the limiting block so that the handle support cannot rotate downwards, the handle support is provided with a handle unlocking piece which can drive the handle locking piece to move to the unlocking position, when the handle locking piece moves to the unlocking position, the limiting block is far away from the safety bump so that the handle support can rotate downwards, and the framework is provided with a second resetting piece which can drive the handle locking piece to move to the locking position.

As a further improvement of the utility model, the handle unlocking member is provided with a guide through hole for connecting the handle bracket so that the handle unlocking member can move back and forth relative to the handle bracket, and the handle unlocking member can move forward to push the handle locking member to move downward to the unlocking position.

As a further improvement of the utility model, the front end face of the handle unlocking piece is provided with a pushing inclined plane, and the handle locking piece is provided with an unlocking inclined plane matched with the pushing inclined plane.

As a further improvement of the utility model, the connecting rod assembly comprises a first connecting rod, a second connecting rod and a third connecting rod, one end of the first connecting rod is rotationally connected to the handle bracket, the other end of the first connecting rod is rotationally connected to the second connecting rod and the third connecting rod, the other end of the second connecting rod is rotationally connected to the front leg bracket, and the other end of the third connecting rod is rotationally connected to the framework.

As a further development of the utility model, the guide ramp is provided with an unlocking surface for the engagement of the seat lock in the unlocked state.

As a further improvement of the utility model, the seat locking piece is provided with a limit convex part and a connecting part, the first resetting piece is a first spring, and the first spring is sleeved on the connecting part and is abutted against the limit convex part.

As a further improvement of the utility model, the framework is provided with mounting grooves for mounting the upper part of the front leg support and the lower part of the handle support, the upper end of the front leg support and the lower end of the handle support are both provided with rotating cambered surfaces, and the inner side walls of the mounting grooves are provided with matching cambered surfaces corresponding to the rotating cambered surfaces.

As a further improvement of the utility model, the front leg support is provided with a limiting through hole matched with the framework.

As a further improvement of the utility model, the handle bracket is provided with a mounting through hole into which the handle unlocking member is inserted.

The utility model has the advantages that:

1. Realize less packing volume, conveniently accomodate and transport, can drive the leg support and rotate down together when the handle support rotates down to the in-process of handle support rotation down, the seat locking piece can keep away from the seat support gradually until the seat locking piece breaks away from the seat support under the effect of direction inclined plane, thereby resumes the rotation of seat support, and the user only needs to fold up in the time of just can realizing handle support, leg support and seat support through rotatory handle support, labour saving and time saving.

2. In order to avoid the folding of the whole structure caused by the mistaken touch of the handle support by a user, the handle support is provided with a limiting block which abuts against a safety bump on the handle support, so that the handle support cannot rotate downwards, when the user needs to fold, the handle unlocking piece pushes the handle locking piece downwards, the handle locking piece moves to the unlocking position, and at the moment, the limiting block cannot clamp the safety bump, so that the handle support can rotate downwards, and folding is realized.

3. The handle locking piece can be moved to the unlocking position only by pushing the handle unlocking piece forwards, and the handle locking piece returns to the locking position under the action of the second resetting piece when the handle unlocking piece is pulled backwards, so that the operation is simple and convenient, and the operation of retracting the vehicle can be realized by one hand.

Drawings

FIG. 1 is a schematic view of the overall construction of the present utility model as applied to a cart;

FIG. 2 is an exploded view of the structure of the present utility model;

FIG. 3 is a step view of the utility model omitting the rear leg rest, seat rest and a portion of the frame rear handle lock to an unlocked position;

FIG. 4 is a step view of the utility model omitting the rear leg rest, seat rest, and frame rear handle lock to an unlocked position;

FIG. 5 is a step diagram of the connecting rod structure of the front and rear sides of the collecting vehicle of the utility model;

FIG. 6 is an exploded view of the front leg rest, seat lock and first return member of the present utility model;

FIG. 7 is a schematic view of the folded structure of the present utility model when applied to a cart;

FIG. 8 is a schematic view of the present utility model in a folded configuration when applied to a cart;

fig. 9 is a three-dimensional block diagram of the present utility model.

Detailed Description

The technical scheme of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

Referring to fig. 1 to 8, the present utility model provides a folding structure of a cart, which is characterized by comprising a frame 1, a front leg support 2, a rear leg support 3, a handle support 4, a seat support 5, and a link assembly 6 rotatably connected to the front leg support 2, the handle support 4 and the frame 1, wherein the upper part of the front leg support 2 and the lower part of the handle support 4 are rotatably connected to the frame 1 so that the handle support 4 drives the front leg support 2 to rotate downwards together through the link assembly 6 when the handle support 4 rotates downwards;

The upper part of the rear leg support 3 is fixed on the framework 1, the seat support 5 is rotationally connected on the framework 1, the front leg support 2 or/and the handle support 4 is provided with a stepped hole 21, the surface of the stepped part of the stepped hole 21 is provided with a guide inclined plane 211, the guide inclined plane 211 is connected with a seat locking piece 22, the seat locking piece 22 is in a locking state and an unlocking state, when the seat locking piece 22 is in the locking state, the seat locking piece 22 is inserted into the seat support 5 through the stepped hole 21 and the framework 1 to lock the rotation of the seat support 5, and when the front leg support 2 rotates downwards to enable the seat locking piece 22 to move to the unlocking state along the guide inclined plane 211, the seat locking piece 22 is separated from the seat support 5 to recover the rotation of the seat support 5, and a first reset piece 23 capable of driving the seat locking piece 22 to be attached to the guide inclined plane 211 is arranged on the framework 1.

The effect of the structure of the handcart can be seen through fig. 7 and 8, each structure after folding is closely attached, the volume of the timber is very small, the space utilization rate of storage can be effectively improved, the transportation is also convenient, the handcart in the prior art can not be stably placed after being folded, and the handcart can be vertically placed after being folded through fig. 8, so that various storage requirements of users are met.

The handle support 4 can drive the front leg support 2 to rotate downwards together when rotating downwards, and the seat locking piece 22 can be gradually far away from the seat support 5 until the seat locking piece 22 is separated from the seat support 5 under the action of the guide inclined plane 211 in the process of rotating downwards the handle support 4, so that the rotation of the seat support 5 is recovered, a user only needs to rotate the handle support 4 to fold the handle support 4, the front leg support 2 and the seat support 5 simultaneously, time and labor are saved, and attention is paid to the fact that the seat locking piece 22 is always inserted on the framework 1 and the stepped hole 21, so that the guide inclined plane 211 on the stepped hole 21 drives the seat locking piece 22 to move in the axial direction in the process of rotating the handle support 4 or the front leg support 2.

Referring to fig. 2 to 5, the frame 1 is provided with a frame groove 12 in which the handle lock 11 can be placed and in which the handle lock 11 can be moved up and down, the handle support 4 is provided with a safety bump 41, the handle lock 11 is provided with a stopper 111, the handle lock 11 has a locked position and an unlocked position, when the handle lock 11 is moved to the locked position, the safety bump 41 abuts against the stopper 111 to prevent the handle support 4 from rotating down, the handle support 4 is provided with a handle unlock 42 in which the handle lock 11 can be driven to move to the unlocked position, when the handle lock 11 is moved to the unlocked position, the stopper 111 is away from the safety bump 41 to enable the handle support 4 to rotate down, and the frame 1 is provided with a second reset member capable of driving the handle lock 11 to move to the locked position; in order to avoid the folding of the whole structure caused by the mistaken touch of the handle support 4 by a user, the handle support 4 is provided with a limiting block 111 which abuts against a safety bump 41 on the handle support 4, so that the handle support 4 cannot rotate downwards, when the user needs to fold, the handle locking piece 11 is pushed downwards through the handle unlocking piece 42, the handle locking piece 11 is moved to the unlocking position, and at the moment, the limiting block 111 cannot clamp the safety bump 41, so that the handle support 4 can rotate downwards, and folding is realized.

Referring to fig. 3 and 4, the handle unlocking member 42 is provided with a guide through hole 421 for connecting the handle bracket 4 so that the handle unlocking member 42 can move forward and backward with respect to the handle bracket 4, and the handle unlocking member 42 can move forward to push the handle locking member 11 to move downward to the unlocking position; as a preferable scheme, the guide through hole 421 is in a bar shape, the handle unlocking piece 42 can be pushed forward to move the handle locking piece 11 to the unlocking position, the handle unlocking piece 42 is pulled backward, the handle locking piece 11 returns to the locking position under the action of the second resetting piece, the operation is simple and convenient, and the operation of retracting the vehicle can be realized by one hand.

Of course, the handle lock release member 42 is not limited to this, and the handle lock member 11 may be moved to the unlock position by pressing, cylinder driving, or the like.

Referring to fig. 4, a push inclined plane 422 is disposed on the front end surface of the handle unlocking member 42, the handle locking member 11 is provided with an unlocking inclined plane 112 matched with the push inclined plane 422, and the handle unlocking member 42 can be driven to move downwards when being moved forwards by the push inclined plane 422 and the unlocking inclined plane 112, so that dead point clamping is avoided.

Referring to fig. 3 and 5, the link assembly 6 includes a first link 61, a second link 62 and a third link 63, one end of the first link 61 is rotatably connected to the handle bracket 4, the other end is rotatably connected to the second link 62 and the third link 63, the other end of the second link 62 is rotatably connected to the front leg bracket 2, and the other end of the third link 63 is rotatably connected to the frame 1; referring to fig. 5 and 3, when the handle bracket 4 rotates downward, the lever AB rotates counterclockwise around the point a, driving the third link FC to swing counterclockwise around the point F, and further driving the lever DE to rotate clockwise, so as to realize the downward rotation of the front leg bracket 2, and the structure is simple.

Referring to fig. 6, the guide slope 211 is provided with an unlocking plane 212 to which the seat lock 22 fits when in the unlocked state; since the seat lock 22 is inserted into the frame 1, if the seat lock 22 is directly fitted to the guide slope 211, it is liable that the local pressure of the fitting surface of the seat lock 22 is excessively large, and abrasion is caused under long-term operation, and thus the unlocking plane 212 is provided to increase the contact area with the seat lock 22.

Referring to fig. 6, the seat locking member 22 has a limit protrusion 221 and a connection portion 222, and the first restoring member 23 is a first spring, which is sleeved on the connection portion 222 and abuts against the limit protrusion 221, and is configured to reinsert the seat bracket 5 when the seat locking member 22 moves to the locked state.

Referring to fig. 2, the frame 1 is provided with mounting grooves 13 for mounting the upper portion of the front leg rest 2 and the lower portion of the handle rest 4, the upper end of the front leg rest 2 and the lower end of the handle rest 4 are each provided with a rotation arc surface 24, and the inner side walls of the mounting grooves 13 are provided with mating arc surfaces 131 corresponding to the rotation arc surfaces 24, so that the front leg rest 2 and the handle rest 4 can be freely rotated.

Referring to fig. 6, the front leg supporter 2 is provided with a limiting through hole 25 engaged with the backbone 1.

Referring to fig. 2 and 4, the handle bracket 4 is provided with a mounting through hole 43 into which the handle unlocking member 42 is inserted, and the mounting through hole 43 is provided to guide the handle unlocking member 42 so as to move only forward and backward along the inner side wall of the mounting through hole 43.

Referring to fig. 9, a three-dimensional structure diagram of the present application for a cart is disclosed, and a patent application is made for the purpose of protecting innovation.

Claims

1. The folding structure of the handcart is characterized by comprising a framework (1), a front leg support (2), a rear leg support (3), a handle support (4), a seat support (5) and a connecting rod assembly (6) which is rotationally connected with the front leg support (2), the handle support (4) and the framework (1), wherein the upper part of the front leg support (2) and the lower part of the handle support (4) are rotationally connected with the framework (1) so that the handle support (4) is driven to rotate downwards together by the connecting rod assembly (6) when rotating downwards;

The upper portion of back leg support (3) is fixed on skeleton (1), seat support (5) rotate and connect on skeleton (1), preceding leg support (2) or/and handle support (4) are equipped with shoulder hole (21), the surface of the step department of shoulder hole (21) is equipped with direction inclined plane (211), direction inclined plane (211) are connected with seat locking piece (22), seat locking piece (22) have locking state and unblock state, when being located locking state, seat locking piece (22) pass shoulder hole (21) and skeleton (1) insert seat support (5) in order to lock seat support (5) rotate, and when current leg support (2) rotate so that seat locking piece (22) are followed direction inclined plane (211) move to the unblock state, seat locking piece (22) break away from seat support (5) in order to resume seat support (5) rotation, be equipped with on skeleton (1) and can drive locking piece (22) laminating seat (23) and reset the first inclined plane (211).

2. The folding structure of a trolley according to claim 1, characterized in that the framework (1) is provided with a framework groove (12) capable of placing a handle locking piece (11) and allowing the handle locking piece (11) to move up and down, the handle support (4) is provided with a safety bump (41), the handle locking piece (11) is provided with a limiting block (111), the handle locking piece (11) is provided with a locking position and an unlocking position, when the handle locking piece (11) moves to the locking position, the safety bump (41) abuts against the limiting block (111) to enable the handle support (4) to be unable to rotate downwards, the handle support (4) is provided with a handle unlocking piece (42) capable of driving the handle locking piece (11) to move to the unlocking position, when the handle locking piece (11) moves to the unlocking position, the limiting block (111) is far away from the safety bump (41) to enable the handle support (4) to rotate downwards, and the framework (1) is provided with a handle unlocking piece (11) capable of driving the handle locking piece (11) to move to the second locking position.

3. A folding structure of a trolley according to claim 2, characterized in that the handle unlocking member (42) is provided with a guide through hole (421) for connecting the handle bracket (4) so that the handle unlocking member (42) can move back and forth relative to the handle bracket (4), and that the handle unlocking member (42) can move forward to push the handle locking member (11) to move downward to the unlocking position.

4. A folding structure of a trolley according to claim 3, characterized in that the front end face of the handle unlocking member (42) is provided with a pushing inclined plane (422), and the handle locking member (11) is provided with an unlocking inclined plane (112) which is matched with the pushing inclined plane (422).

5. A folding structure of a trolley according to claim 1, characterized in that the link assembly (6) comprises a first link (61), a second link (62) and a third link (63), one end of the first link (61) is rotatably connected to the handle bracket (4), the other end is rotatably connected to the second link (62) and the third link (63), the other end of the second link (62) is rotatably connected to the front leg bracket (2), and the other end of the third link (63) is rotatably connected to the frame (1).

6. A folding structure of a trolley according to claim 1, characterized in that the guiding inclined plane (211) is provided with an unlocking plane (212) for fitting when the seat locking element (22) is in the unlocked state.

7. The folding structure of a trolley according to claim 1, wherein the seat locking member (22) has a limit protrusion (221) and a connecting portion (222), and the first restoring member (23) is a spring, and the spring is sleeved on the connecting portion (222) and abuts against the limit protrusion (221).

8. The folding structure of a trolley according to claim 1, characterized in that the frame (1) is provided with a mounting groove (13) for mounting the upper part of the front leg support (2) and the lower part of the handle support (4), the upper end of the front leg support (2) and the lower end of the handle support (4) are both provided with a rotating cambered surface (24), and the inner side wall of the mounting groove (13) is provided with a mating cambered surface (131) corresponding to the rotating cambered surface (24).

9. A folding structure of a trolley according to claim 1, characterized in that the front leg support (2) is provided with a limit through hole (25) cooperating with the frame (1).

10. A folding structure of a trolley according to claim 2, characterized in that the handle bracket (4) is provided with a mounting through hole (43) into which the handle unlocking member (42) is inserted.