A folding cart

Abstract

The present invention discloses a folding cart, which has an open state and a folding state, and comprises a front wheel bracket, a front wheel assembly, a rear wheel bracket, a rear wheel assembly and an upper bracket, wherein the upper bracket is pivotally connected to the front wheel bracket through a first rotating shaft, and a sliding groove is provided at the upper end of the rear wheel bracket; the rear wheel bracket is connected to the front wheel bracket through a second rotating shaft, and a pin is provided at the lower part of the upper bracket, and the pin is inserted into the sliding groove, or the rear wheel bracket is connected to the upper bracket through a second rotating shaft, and a pin is provided at the upper part of the front wheel bracket, and the pin is inserted into the sliding groove; when the folding cart is converted from the open state to the folding state, the pin slides along the sliding groove and rotates relative to the sliding groove. The folding cart of the present invention can be conveniently folded and unfolded, and can still stand upright after being folded.

Description

Technical Field

[0001] The invention relates to the field of carts, and in particular to a foldable cart. Background Art

[0002] A stroller is a common tool in daily life, such as a stroller for infants and young children, a stroller for carrying heavy objects, etc. In order to facilitate carrying and storage, the stroller is usually foldable. By folding the stroller, the space occupied by the stroller can be reduced.

[0003] There are many types of folding carts in the prior art, but after folding, they are often still large in size and inconvenient to store, or the folding method is complicated and difficult to operate. In addition, some folding carts cannot stand upright after folding, and placing them directly on the ground may dirty the frame, resulting in a poor user experience. Summary of the invention

[0004] In order to solve the problems of the prior art, the present invention provides a foldable cart that can be conveniently folded and unfolded, and can still stand upright after being folded. The specific technical solution of the present invention is as follows:

[0005] In one aspect, the present invention provides a foldable stroller having an open state and a folded state, the foldable stroller comprising:

[0006] A front wheel bracket, the lower end of which is connected to the front wheel assembly;

[0007] A rear wheel bracket, the lower end of which is connected to the rear wheel assembly;

[0008] An upper bracket, wherein the lower end of the upper bracket is pivotally connected to the upper end of the front wheel bracket via a first rotating shaft;

[0009] The upper end of the rear wheel bracket is connected to the upper pivot of the front wheel bracket through a second rotating shaft. A sliding groove is formed in the upper end of the rear wheel bracket. A pin is provided at the lower part of the upper bracket. The pin is located above the first rotating shaft. The pin is inserted into the sliding groove. When the folding cart is converted from the open state to the folded state, the pin slides along the sliding groove and rotates relative to the sliding groove.

[0010] The upper end of the rear wheel bracket extends forward to form a front extension portion, and the upper end of the rear wheel bracket extends backward to form a rear extension portion. The front extension portion is provided with the second rotating shaft, and the rear extension portion is provided with the sliding groove.

[0011] When the folding cart is converted from the open state to the folded state, the upper bracket rotates around the first pivot so that the upper bracket flips backward and downward. When the folding cart is in the folded state, the upper bracket is close to the rear wheel bracket.

[0012] When the folding cart is in a folded state, the front wheel bracket and the rear wheel bracket are close to each other, and the front wheel assembly and the rear wheel assembly are both in contact with the ground, so that the folding cart stands upright.

[0013] The folding cart further comprises a push handle which is telescopically connected to the upper portion of the upper bracket.

[0014] On the other hand, the present invention provides a second folding stroller having an open state and a folded state, the folding stroller comprising:

[0015] A front wheel bracket, the lower end of which is connected to the front wheel assembly;

[0016] A rear wheel bracket, the lower end of which is connected to the rear wheel assembly;

[0017] An upper bracket, wherein the lower end of the upper bracket is pivotally connected to the upper end of the front wheel bracket via a first rotating shaft;

[0018] The upper end of the rear wheel bracket is connected to the lower pivot of the upper bracket through a third rotating shaft. A sliding groove is formed in the upper end of the rear wheel bracket. A pin is provided on the upper part of the front wheel bracket. The pin is located below the first rotating shaft. The pin is inserted into the sliding groove. When the folding cart is converted from an open state to a folded state, the pin slides along the sliding groove and rotates relative to the sliding groove.

[0019] The upper end of the rear wheel bracket extends forward to form a front extension portion, and the upper end of the rear wheel bracket extends backward to form a rear extension portion. The front extension portion is provided with the sliding groove, and the rear extension portion is provided with the third rotating shaft.

[0020] When the folding cart is converted from the open state to the folded state, the upper bracket rotates around the first pivot so that the upper bracket flips backward and downward. When the folding cart is in the folded state, the upper bracket is close to the rear wheel bracket.

[0021] When the folding cart is in a folded state, the front wheel bracket and the rear wheel bracket are close to each other, and the front wheel assembly and the rear wheel assembly are both in contact with the ground, so that the folding cart stands upright.

[0022] The folding cart further comprises a push handle which is telescopically connected to the upper portion of the upper bracket.

[0023] The beneficial effects brought by the technical solution provided by the present invention are as follows:

[0024] 1) The foldable cart is small in size after folding, which is convenient for storage and movement;

[0025] 2) The folding cart is easy to operate and convenient to fold or unfold, and the user can easily master the operation of the folding cart;

[0026] 3) The folding cart can still stand upright after being folded, avoiding getting the body dirty when placed on the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 is a schematic diagram of a first folding cart provided by an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of a first folding stroller in an open state provided by an embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of the first folding cart provided by an embodiment of the present invention when it is transformed from an open state to a folded state;

[0031] Figure 4 is a schematic diagram of a first folding stroller in a folded state provided by an embodiment of the present invention;

[0032] Figure 5 It is a schematic structural diagram of a second folding cart in a folded state provided by an embodiment of the present invention.

[0033] Among them, the figure numbers include: 1-front wheel bracket, 11-front wheel assembly, 2-rear wheel bracket, 21-rear wheel assembly, 22-sliding groove of the first folding cart, 23-sliding groove of the second folding cart, 3-upper bracket, 4-first rotating shaft, 5-second rotating shaft, 6-pin shaft of the first folding cart, 7-push handle, 8-third rotating shaft, 9-pin shaft of the second folding cart. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0036] In one embodiment of the present invention, a foldable stroller is provided, which has an open state (such as Figure 1-2 shown) and folded state (as Figure 4 As shown), the folding cart comprises

[0037] A front wheel bracket 1, wherein the lower end of the front wheel bracket 1 is connected to the front wheel assembly 11;

[0038] A rear wheel bracket 2, the lower end of which is connected to a rear wheel assembly 21;

[0039] An upper bracket 3, wherein the lower end of the upper bracket 3 is pivotally connected to the upper end of the front wheel bracket 1 via a first rotating shaft 4;

[0040] The upper end of the rear wheel bracket 2 is connected to the upper pivot of the front wheel bracket 1 through a second rotating shaft 5. Figure 1 As shown in FIG. 1 , when the folding cart is in the open state, the second rotating shaft 5 is located below the first rotating shaft 4, a sliding groove 22 is formed at the upper end of the rear wheel bracket 2, and a pin 6 is provided at the lower part of the upper bracket 3, the pin 6 is located above the first rotating shaft 4, and the pin 6 is inserted into the sliding groove 22. Figure 3 As shown, when the folding cart is converted from the open state to the folded state, the pin shaft 6 slides along the sliding groove 22 and rotates relative to the sliding groove 22 .

[0041] Further, the upper end of the rear wheel bracket 2 extends forward to form a front extension portion, and the upper end of the rear wheel bracket extends backward to form a rear extension portion, the front extension portion is provided with the second rotating shaft 5, and the rear extension portion is provided with the sliding groove 22; the upper end of the rear wheel bracket 2 can be a T-shaped or inverted triangle, and a cross bar can also be provided at the upper end of the rear wheel bracket as the front extension portion and the rear extension portion, but it is not limited to the case mentioned in this embodiment. It should be understood that all structures that make the width of the upper end of the rear wheel bracket widen so that the width of the upper end of the rear wheel bracket is sufficient to connect the front wheel bracket and the upper bracket, and the sliding groove 22 is provided at the widened upper end can realize the technical solution of the present invention. Preferably, when the folding cart is in the open state, the pin is located at one end of the sliding groove 22 close to the upper bracket, so that the structure of the folding cart is stable; when the folding cart is in the folded state, the pin is located at the other end of the sliding groove 22.

[0042] When the folding cart is converted from the open state to the folded state, the upper bracket 3 rotates around the first pivot 4 so that the upper bracket 3 flips backward and downward and moves closer to the rear wheel bracket 2. When the folding cart is in the folded state, the upper bracket 3 moves closer to the rear wheel bracket 2, so that the volume of the folding cart is reduced.

[0043] Furthermore, when the folding cart is in the folded state, the front wheel bracket 1 and the rear wheel bracket 2 are close to each other, so that the volume of the folding cart is further reduced. Figure 4 As shown; the front wheel assembly 11 and the rear wheel assembly 21 are in contact with the ground, so that the folding cart stands upright.

[0044] The front wheel assembly 11 may be a universal wheel; preferably, the front wheel assembly and the front wheel bracket may be pivotally connected via a fourth shaft, so that the front wheel assembly may rotate around the front wheel bracket in the folded state, so as to further reduce the space occupied by the foldable cart in the folded state.

[0045] The folding cart further comprises a handle 7, which is telescopically connected to the upper portion of the upper bracket 3. The handle 7 can also be pivotally connected to the upper portion of the upper bracket via a fifth rotating shaft, and when the folding cart is transformed from the open state to the folded state, the handle 7 rotates around the fifth rotating shaft to be close to the upper bracket.

[0046] Furthermore, a locking device is provided at the first rotating shaft; the locking device is preferably connected to the push handle. When the push handle is extended, the locking device is locked; when the push handle is retracted, the locking device is unlocked, so that the folding cart can be further folded.

[0047] In one embodiment of the present invention, a second folding cart is provided, which has an open state and a folded state. The folding cart includes

[0048] A front wheel bracket 1, wherein the lower end of the front wheel bracket 1 is connected to the front wheel assembly 11;

[0049] A rear wheel bracket 2, the lower end of which is connected to a rear wheel assembly 21;

[0050] An upper bracket 3, wherein the lower end of the upper bracket 3 is pivotally connected to the upper end of the front wheel bracket 1 via a first rotating shaft 4;

[0051] The upper end of the rear wheel bracket 2 is pivotally connected to the lower part of the upper bracket 3 through the third rotating shaft 8. When the folding cart is in the open state, the third rotating shaft 8 is located above the first rotating shaft 4. A sliding groove 23 is provided at the upper end of the rear wheel bracket 2. A pin shaft 9 is provided at the upper part of the front wheel bracket 1. The pin shaft 9 is located below the first rotating shaft 4. The pin shaft 9 is inserted into the sliding groove 23. When the folding cart is converted from the open state to the folded state, the pin shaft 9 slides along the sliding groove 23 and rotates relative to the sliding groove 23.

[0052] The difference from the above embodiment is that the upper end of the rear wheel bracket 2 is pivotally connected to the front wheel bracket 1 instead of being pivotally connected to the upper end of the rear wheel bracket 2 and the upper bracket 3, and the pin that slides in the sliding groove 23 is changed from being arranged at the lower part of the upper bracket 3 to being arranged at the upper part of the front wheel bracket 1. Figure 5 shown.

[0053] Further, the upper end of the rear wheel bracket 2 extends forward to form a front extension portion, and the upper end of the rear wheel bracket extends backward to form a rear extension portion, the front extension portion is provided with the sliding groove 23, and the rear extension portion is provided with the third rotating shaft 8; the upper end of the rear wheel bracket 2 can be a T-shaped or inverted triangle, and a cross bar can also be provided at the upper end of the rear wheel bracket as the front extension portion and the rear extension portion, but it is not limited to the case mentioned in this embodiment. It should be understood that all structures that make the width of the upper end of the rear wheel bracket widen so that the width of the upper end of the rear wheel bracket is sufficient to connect the front wheel bracket and the upper bracket, and the sliding groove 22 is provided at the widened upper end can realize the technical solution of the present invention. Preferably, when the folding cart is in the open state, the pin is located at one end of the sliding groove 22 close to the front wheel bracket, so that the structure of the folding cart is stable; when the folding cart is in the folded state, the pin is located at the other end of the sliding groove 22.

[0054] When the folding cart is converted from the open state to the folded state, the upper bracket 3 rotates around the first pivot 4 so that the upper bracket 3 flips backward and downward. When the folding cart is in the folded state, the upper bracket 3 and the rear wheel bracket 2 are close to each other, so that the volume of the folding cart is reduced.

[0055] Furthermore, when the folding cart is in a folded state, the front wheel bracket 1 and the rear wheel bracket 2 are close to each other, so that the volume of the folding cart is further reduced; the front wheel assembly 11 and the rear wheel assembly 21 are both in contact with the ground, so that the folding cart stands upright.

[0056] The front wheel assembly 11 may be a universal wheel; preferably, the front wheel assembly and the front wheel bracket may be pivotally connected via a fourth shaft, so that the front wheel assembly may rotate around the front wheel bracket in the folded state, so as to further reduce the space occupied by the foldable cart in the folded state.

[0057] The folding cart further comprises a handle 7, which is telescopically connected to the upper portion of the upper bracket 3. The handle can also be pivotally connected to the upper portion of the upper bracket via a fifth rotating shaft, and when the folding cart is transformed from the open state to the folded state, the handle rotates around the fifth rotating shaft to be close to the upper bracket.

[0058] Furthermore, a locking device is provided at the first rotating shaft; the locking device is preferably connected to the push handle. When the push handle is extended, the locking device is locked; when the push handle is retracted, the locking device is unlocked, so that the folding cart can be further folded.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A foldable cart having an open state and a folded state, the foldable cart comprising A front wheel bracket (1), wherein the lower end of the front wheel bracket (1) is connected to the front wheel assembly (11); A rear wheel bracket (2), wherein the lower end of the rear wheel bracket (2) is connected to the rear wheel assembly (21); An upper bracket (3), the lower end of the upper bracket (3) being pivotally connected to the upper end of the front wheel bracket (1) via a first rotating shaft (4); It is characterized in that The upper end of the rear wheel bracket (2) is connected to the upper pivot of the front wheel bracket (1) through a second rotating shaft (5); a sliding groove (22) is provided at the upper end of the rear wheel bracket (2); a pin shaft (6) is provided at the lower part of the upper bracket (3); the pin shaft (6) is located above the first rotating shaft (4); the pin shaft (6) is inserted into the sliding groove (22); when the folding cart is converted from the open state to the folded state, the pin shaft (6) slides along the sliding groove (22) and rotates relative to the sliding groove (22); The upper end of the rear wheel bracket (2) extends forward to form a front extension portion, and the upper end of the rear wheel bracket extends backward to form a rear extension portion, the front extension portion is provided with the second rotating shaft (5), and the rear extension portion is provided with the sliding groove (22); When the folding cart is converted from the open state to the folded state, the upper bracket (3) rotates around the first rotating shaft (4) so ​​that the upper bracket (3) flips backward and downward, and the pin slides from the end away from the second rotating shaft to the end close to the second rotating shaft in the sliding groove. When the folding cart is in the folded state, the upper bracket (3) and the rear wheel bracket (2) are close to each other.

2. The folding stroller according to claim 1, characterized in that: When the folding cart is in a folded state, the front wheel bracket (1) and the rear wheel bracket (2) are close to each other, and the front wheel assembly (11) and the rear wheel assembly (21) are both in contact with the ground, so that the folding cart stands upright.

3. The folding stroller according to claim 1, characterized in that: The folding cart further comprises a push handle (7), and the push handle (7) is telescopically connected to the upper part of the upper bracket (3).

4. A foldable cart having an open state and a folded state, the foldable cart comprising A front wheel bracket (1), wherein the lower end of the front wheel bracket (1) is connected to the front wheel assembly (11); A rear wheel bracket (2), wherein the lower end of the rear wheel bracket (2) is connected to the rear wheel assembly (21); An upper bracket (3), the lower end of the upper bracket (3) being pivotally connected to the upper end of the front wheel bracket (1) via a first rotating shaft (4); It is characterized in that The upper end of the rear wheel bracket (2) is pivotally connected to the lower part of the upper bracket (3) through a third rotating shaft (8); a sliding groove (23) is formed at the upper end of the rear wheel bracket (2); a pin shaft (9) is provided at the upper part of the front wheel bracket (1); the pin shaft (9) is located below the first rotating shaft (4); the pin shaft (9) is inserted into the sliding groove (23); when the folding cart is converted from an open state to a folded state, the pin shaft (9) slides along the sliding groove (23) and rotates relative to the sliding groove (23); The upper end of the rear wheel bracket (2) extends forward to form a front extension portion, and the upper end of the rear wheel bracket extends backward to form a rear extension portion, the front extension portion is provided with the sliding groove (23), and the rear extension portion is provided with the third rotating shaft (8); When the folding cart is converted from the open state to the folded state, the upper bracket (3) rotates around the first rotating shaft (4) so ​​that the upper bracket (3) flips backward and downward, and the pin slides from the end away from the third rotating shaft to the end close to the third rotating shaft in the sliding groove. When the folding cart is in the folded state, the upper bracket (3) and the rear wheel bracket (2) are close to each other.

5. The folding stroller according to claim 4, characterized in that: When the folding cart is in a folded state, the front wheel bracket (1) and the rear wheel bracket (2) are close to each other, and the front wheel assembly (11) and the rear wheel assembly (21) are both in contact with the ground, so that the folding cart stands upright.

6. The folding stroller according to claim 4, characterized in that: The folding cart further comprises a push handle (7), and the push handle (7) is telescopically connected to the upper part of the upper bracket (3).

Images