CN216185261U

CN216185261U - Foldable cart

Info

Publication number: CN216185261U
Application number: CN202122512255.4U
Authority: CN
Inventors: 华山
Original assignee: Ningbo Pinyi Outdoor Product Technology Co ltd
Current assignee: Ningbo Pinyi Outdoor Product Technology Co ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-04-05
Anticipated expiration: 2031-10-19

Abstract

The utility model relates to the technical field of a cart, and discloses a foldable cart, which comprises: the first side support, the second side support, the third side support and the fourth side support are arranged in sequence, and the first side support, the second side support, the third side support and the fourth side support can be folded; the position locking rod comprises a first connecting rod and a second connecting rod, one ends of the first connecting rod and the second connecting rod are hinged with each other, and the other ends of the first connecting rod and the second connecting rod are connected to the first side support or the second side support or the third side support; the cart has a folded state and an unfolded state, and when the cart is in the unfolded state, the first connecting rod and the second connecting rod are horizontally arranged. The trolley has the advantages that the first side bracket, the second side bracket, the third side bracket, the fourth side bracket and the underframe at the four sides of the trolley can be folded, so that the occupied space is reduced; and the locking rod is arranged to lock the unfolding state of the cart, so that the stability of the cart in the normal use process is ensured.

Description

Foldable cart

Technical Field

The utility model relates to the technical field of carts, in particular to a foldable cart.

Background

During handling of tools and articles, a trolley is often required, and is generally of a fixed integral structure and provided with a container for accommodating articles, so that the trolley occupies a large space and is high in packaging and transportation cost.

For example, patent "CN 106627690B" discloses a trolley convertible between a folded state and an unfolded state, the trolley comprising: the front wall, the side walls and the rear baffle plate are respectively formed by a scissor type connecting rod assembly; the frame also comprises a vertical telescopic rod assembly, and the top end and the bottom end of the telescopic rod assembly are connected with the crossing positions of the front wall scissor type connecting rod assembly and the scissor type connecting rod assemblies on the two side walls; the frame also includes a vertical telescopic rod assembly connected to the rear ends of the scissor type link assemblies of the two side walls; and telescopic rod assemblies positioned at the tail ends of the two sides of the scissor type connecting rod assembly of the rear baffle plate, wherein when the handcart is in an unfolding state, the rear baffle plate and the telescopic rod assemblies can rotate from a vertical position to a horizontal position; the design of the frame ensures that when the trolley is converted from the unfolding state to the folding state and the rear baffle is in the vertical position, the heights of the scissor type connecting rod assembly and the telescopic rod assembly are increased, and the width of the scissor type connecting rod assembly is reduced; four wheels, each wheel secured to a bottom end portion of a corresponding telescoping rod assembly; and a flexible liner secured to the frame and defining an open-topped interior cargo compartment within the cart when the cart is in the expanded configuration. The cart in the patent scheme has a folding function, but the cart is unstable in an unfolding state, easy to shrink and incapable of guaranteeing normal use of the cart.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the present invention provides a foldable stroller with a stable unfolded state and a retractable handle.

The technical scheme adopted by the utility model for solving the technical problem is to provide a foldable cart, which comprises:

the first side support, the second side support, the third side support and the fourth side support are arranged in sequence and can be folded;

the position locking rod comprises a first connecting rod and a second connecting rod, one ends of the first connecting rod and the second connecting rod are hinged with each other, and the other ends of the first connecting rod and the second connecting rod are connected to the first side support or the second side support or the third side support;

the cart has a folded state and an unfolded state, and when the cart is in the unfolded state, the first connecting rod and the second connecting rod are horizontally arranged.

Further, when the cart is converted from the unfolded state to the folded state, the first side support, the second side support, the third side support and the fourth side support are increased in height and reduced in width.

Furthermore, the position locking rod is arranged on the first side support and the third side support, and the first side support and the third side support respectively comprise two telescopic assemblies, two third connecting rods and two fourth connecting rods with one ends hinged with each other;

one end of each of the first connecting rod and the third connecting rod is hinged to one of the fourth connecting rods, and one end of each of the second connecting rod and the other third connecting rod is hinged to the other fourth connecting rod; and the other end of the third connecting rod is hinged with one end of the telescopic assembly, and the other end of the fourth connecting rod is hinged with the other end of the telescopic assembly.

Further, still include the handle subassembly, the handle subassembly rotationally sets up on the second side support, just the handle subassembly includes the handle and articulates two fifth connecting rods on hand, two the one end of fifth connecting rod is connected respectively two the bottom of flexible subassembly.

Furthermore, a first connecting seat is arranged on the telescopic assembly, a through hole, a pin shaft and a torsion spring are arranged on the first connecting seat, the torsion spring is sleeved on the pin shaft, and one end of the torsion spring is arranged in the through hole in a penetrating manner;

the handle assembly further comprises a second connecting seat, one end of the second connecting seat is hinged with the fifth connecting rod, and the other end of the second connecting seat is hinged with the pin shaft; and the other end of the torsion spring is abutted against the second connecting seat.

Further, the fourth side bracket further comprises a door frame which is rotatably arranged on the telescopic assembly;

and the two telescopic assemblies are hinged with connecting plates, one end of the portal frame close to the bottom of the portal frame is provided with a connecting block, and the connecting block is arranged on the connecting plates in a sliding manner.

Furthermore, a sliding groove is formed in the connecting plate, and the connecting block is arranged in the sliding groove in a penetrating mode; and when the door frame is in a horizontal position, the connecting block is abutted to the end part of the sliding groove.

Further, still include the chassis, the chassis includes articulated seat and one end articulates four sixth connecting rods on articulated seat, the other end of sixth connecting rod articulates on telescopic component.

Further, flexible subassembly includes first telescopic link and second telescopic link, first telescopic link telescopic wears to establish in the second telescopic link.

Further, the bottom of the second telescopic rod is provided with wheels.

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

in the utility model, the foldable first side bracket, the foldable second side bracket, the foldable third side bracket, the foldable fourth side bracket and the underframe are arranged to realize the folding of the cart, and the cart is folded when not in use, thereby reducing the occupied space and being convenient for transportation; when the cart is in the unfolding state, the first connecting rod and the second connecting rod of the position locking rod on the first side support, the second side support or the third side support are horizontally arranged (namely are positioned on the same straight line), so that the unfolding state of the cart can be locked, and the stability of the unfolding state of the cart is ensured when no goods exist in the cart; the handle assembly of this shallow rotationally sets up on second side support, and sets up the torsional spring on second side support, but makes handle assembly rotate back automatic retraction reset, need not to set up buckle structure on second side support and fixes handle assembly, and it is convenient to use.

Drawings

Fig. 1 is a schematic view of the overall structure of the foldable stroller of the present invention (unfolded state);

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a schematic view of the opened door frame;

FIG. 4 is a schematic view of the cart in a collapsed position;

FIG. 5 is a schematic view of the structure of FIG. 4 from another perspective;

fig. 6 is an exploded view of the second side bracket and handle assembly.

In the figure:

1. a first side support; 10. a telescoping assembly; 100. a connecting plate; 101. a chute; 102. a first telescopic rod; 103. a second telescopic rod; 11. a third link; 12. a fourth link;

2. a second side bracket; 20. a first connecting seat; 200. a through hole; 21. a pin shaft; 22. a torsion spring;

3. a third side bracket;

4. a fourth stent; 40. a gantry; 400. connecting blocks;

5. a position locking rod; 50. a first link; 51. a second link;

6. a handle assembly; 60. a handle; 61. a fifth link; 62. a second connecting seat;

7. a chassis; 70. a hinged seat; 71. a sixth link; 8. and (7) wheels.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 6, a foldable stroller includes a first side support 1, a second side support 2, a third side support 3, and a fourth side support 4, which are sequentially disposed, and a bottom frame 7.

Wherein, the first side bracket 1, the second side bracket 2, the third side bracket 3 and the fourth side bracket 4 can be folded; the position locking rod 5 comprises a first connecting rod and a second connecting rod 51, one ends of the first connecting rod and the second connecting rod 51 are hinged with each other, and the other ends of the first connecting rod and the second connecting rod 51 are connected to the first side bracket 1, the second side bracket 2 or the third side bracket 3; the cart has a collapsed state and an expanded state, and when the cart is in the expanded state, both the first link and the second link 51 are horizontally disposed. Specifically, when the cart is normally used, the cart is in an unfolded state, the width of each side bracket and the chassis 7 reaches the maximum to accommodate more goods, at the moment, the first connecting rod and the second connecting rod 51 of the position locking rod 5 are horizontally arranged and can lock each side bracket and the chassis 7 on the same straight line, and when no goods are placed in the cart, the cart can be kept in the unfolded state, so that the normal use of the cart is ensured; when the cart is not used or needs to be carried, the locking rod 5 is pressed down, and the side supports are unlocked to fold the cart, so that the occupied space of the cart is reduced, and the cart is convenient to place.

In this embodiment, when the stroller is converted from the unfolded state to the folded state, the first side frame 1, the second side frame 2, the third side frame 3 and the fourth side frame 4 have increased height and decreased width, so that the stroller can be folded compactly.

In actual use, the locking rods 5 are arranged on the first side bracket 1 and the third side bracket 3, so that the locking stability in the unfolding state is ensured; the first side bracket 1 and the third side bracket 3 respectively comprise two telescopic assemblies 10, two third connecting rods 11 and two fourth connecting rods 12 with one ends hinged with each other, one ends of the first connecting rod and one third connecting rod 11 are respectively hinged on one fourth connecting rod 12, and one ends of the second connecting rod 51 and the other third connecting rod 11 are respectively hinged on the other fourth connecting rod 12; and the other end of the third connecting rod 11 is hinged with one end of the telescopic assembly 10, and the other end of the fourth connecting rod 12 is hinged with the other end of the telescopic assembly 10. Specifically, the two third connecting rods 11, the two fourth connecting rods 12 and the first connecting rod and the second connecting rod 51 are symmetrically arranged, and the first connecting rod and the second connecting rod 51 and the two fourth connecting rods 12 form a triangular structure when the connecting rods are horizontally arranged, so that locking stability is achieved; the telescopic assembly 10 comprises a first telescopic rod 102 and a second telescopic rod 103, the first telescopic rod 102 is arranged in the second telescopic rod 103 in a telescopic mode, the fourth connecting rod 12 is connected to the first telescopic rod 102, the third connecting rod 11 is connected to the second telescopic rod 103, and the two fourth connecting rods 12 can be mutually drawn together when the telescopic assembly is folded. The connecting rods of the second side support 2 and the fourth side support 4 are also connected with the first telescopic rod 102 and the second telescopic rod 103 respectively, so that the second side support 2 and the fourth side support 4 can be folded.

The cart further comprises a handle assembly 6, the handle assembly 6 is rotatably arranged on the second side support 2, the handle assembly 6 comprises a handle 60 and two fifth connecting rods 61 hinged on the handle 60, one ends of the two fifth connecting rods 61 are respectively connected to the bottoms of the two telescopic assemblies 10, and the handle 60 moves downwards when being folded so as to reduce the height of the handle assembly 6. Specifically, the telescopic assembly 10 is provided with a first connecting seat 20, the first connecting seat 20 is provided with a through hole 200, a pin shaft 21 and a torsion spring 22, the torsion spring 22 is sleeved on the pin shaft 21, and one end of the torsion spring 22 is inserted into the through hole 200; the handle assembly 6 further comprises a second connecting seat 62, one end of the second connecting seat 62 is hinged with the fifth connecting rod 61, and the other end of the second connecting seat 62 is hinged with the pin 21; and the other end of the torsion spring 22 abuts against the second connecting seat 62; when the handle assembly 6 is used, the handle assembly 6 can rotate to a proper angle according to use requirements, and after the handle assembly 6 is released, the handle assembly can automatically retract under the action of the torsion spring 22 to reset, a buckling structure is not required to be arranged on the second side bracket 2 for fixing, and the use is convenient; and the handle 60 can swing left and right in a small range to facilitate steering of the cart when in use.

Preferably, the fourth side frame 4 further comprises a door frame 40 rotatably disposed on the telescopic assemblies 10, two telescopic assemblies 10 are also disposed on the door frame 40, both telescopic assemblies 10 are hinged with a connecting plate 100, one end of the door frame 40 near the bottom thereof is provided with a connecting block 400, and the connecting block 400 is slidably disposed on the connecting plate 100; the connecting plate 100 is provided with a sliding slot 101, the connecting block 400 is arranged in the sliding slot 101 in a penetrating way, and when the gantry 40 is in a horizontal position, the connecting block 400 abuts against the end part of the sliding slot 101. When the telescopic trolley is used, the length of the telescopic assembly 10 on the door frame 40 can be prolonged, the available space of the trolley is enlarged, and large-sized objects can be conveniently placed.

In this embodiment, the bottom frame 7 includes a hinge seat 70 and four sixth connecting rods 71, one end of each of the sixth connecting rods 71 is hinged to the hinge seat 70, the other end of each of the sixth connecting rods 71 is hinged to the telescopic assembly 10, when the first side support 1, the second side support 2, the third side support 3 and the fourth side support 4 are folded, the bottom frame 7 can also be folded, and the upward movement height of the hinge seat 70 is increased but not higher than the height of each of the side supports. Wheels 8 are arranged at the bottoms of the second telescopic rods 103 to ensure the normal running of the cart; the cart is provided with the oversized wheels 8, so that the cart can adapt to various uneven ground surfaces such as grasslands, sand beaches and sand, the front wheel is designed to rotate 360 degrees, and the cart can move smoothly.

In the scheme, the cart has a folding function, and the locking rod 5 is arranged, so that the unfolding state of the cart can be locked, and the normal use of the cart is ensured; and the folding mode is simple and convenient, the occupied space after folding is small, and the storage and the transportation are convenient.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Claims

1. A foldable cart, comprising:

2. The foldable stroller of claim 1, wherein the first, second, third and fourth side supports have increased heights and decreased widths when the stroller is converted from the unfolded state to the folded state.

3. The foldable cart according to claim 1, wherein the position locking bar is disposed on the first side bracket and the third side bracket, and each of the first side bracket and the third side bracket comprises two telescopic assemblies, two third connecting rods and two fourth connecting rods with one end hinged to each other;

4. The foldable cart according to claim 3, further comprising a handle assembly, wherein the handle assembly is rotatably disposed on the second side frame, and the handle assembly comprises a handle and two fifth connecting rods hinged to the handle, and one end of each of the two fifth connecting rods is connected to the bottom of each of the two telescopic assemblies.

5. The foldable cart according to claim 4, wherein the telescopic assembly is provided with a first connecting seat, the first connecting seat is provided with a through hole, a pin shaft and a torsion spring, the torsion spring is sleeved on the pin shaft, and one end of the torsion spring is inserted into the through hole;

6. The foldable cart of claim 3, wherein the fourth leg further comprises a mast rotatably disposed on the telescoping assembly;

7. The foldable cart according to claim 6, wherein the connecting plate is provided with a sliding slot, and the connecting block is inserted into the sliding slot; and when the door frame is in a horizontal position, the connecting block is abutted to the end part of the sliding groove.

8. The foldable cart of claim 3, further comprising an undercarriage including a hinge base and four sixth links hinged to the hinge base at one end, the sixth links being hinged to the telescoping assembly at the other end.

9. The foldable cart of claim 3, wherein the telescoping assembly comprises a first telescoping rod and a second telescoping rod, the first telescoping rod telescopically received in the second telescoping rod.

10. The foldable stroller of claim 9, wherein the bottom of the second telescoping rod is provided with wheels.