A locking structure for a folding panel and a folding shopping cart

Abstract

This utility model belongs to the technical field of locking devices for folding appliances, specifically referring to a locking structure for a folding plate and a folding shopping cart. A mounting cavity is provided at the end of a first or second folding plate. A pin is vertically movably mounted within the mounting cavity, with its upper end extending out of the mounting cavity and connecting to a locking block. A limiting element is provided on the pin. A first spring is fitted onto the pin between the top wall of the mounting cavity and the limiting element. A movable plate is horizontally movably mounted within the mounting cavity. One end of the movable plate is elastically connected to the side wall of the mounting cavity via a second spring, and the other end can extend out of the mounting cavity under the force of the second spring. A through hole is provided on the movable plate for the pin to pass through. This utility model, through the linkage structure of the pin, movable plate, and double springs, achieves automatic locking when the folding plate is unfolded by pressing the movable plate to guide the pin back to its original position. When folded, one-button unlocking is achieved by pulling up the locking block. It has advantages such as simple operation, reliable locking, and compact structure.

Description

Technical Field

[0001] This utility model belongs to the technical field of locking devices for folding appliances, specifically referring to a locking structure for a folding plate and a folding shopping cart. Background Technology

[0002] Foldable products (such as foldable shopping carts) are widely used because of their space-saving advantage, and their core component lies in the locking structure at the hinge.

[0003] Chinese utility model patent (authorization announcement number CN 214689630U, authorization announcement date 2021.11.12) discloses a push shopping cart, which includes a left folding plate and a right folding plate. A push baffle is slidably connected to the top of the left folding plate. By pushing the push baffle along the top of the left folding plate, the push baffle can be positioned between the tops of the left and right folding plates. With the cooperation of the push baffle, the left folding plate and the right folding plate, the left and right folding plates can be effectively limited, effectively preventing the left and right folding plates from shaking during use, thereby achieving the effect of fixing the shopping cart when it is opened.

[0004] The locking process of the aforementioned push shopping cart relies entirely on the user's manual operation. The user must perform a pushing motion to lock the cart, which makes it inconvenient to operate. Summary of the Invention

[0005] The purpose of this invention is to provide a locking structure for a folding plate that is easy to operate and a folding shopping cart having the above-mentioned locking structure.

[0006] This utility model is implemented as follows: A locking structure for a folding plate includes a first folding plate and a second folding plate hinged together, and a locking block for locking the two. An installation cavity is provided at the end of the first or second folding plate. A pin is vertically movably disposed within the installation cavity, with its upper end extending out of the installation cavity and connecting to the locking block. A limiting element is provided on the pin. A first spring is fitted onto the pin between the top wall of the installation cavity and the limiting element. A movable plate is horizontally movably disposed within the installation cavity. One end of the movable plate is elastically connected to the side wall of the installation cavity via a second spring, and the other end can extend out of the installation cavity under the force of the second spring. A through hole is provided on the movable plate for the pin to pass through. When folding, the locking block is pulled upwards and the first spring is compressed, causing the pin to move upwards and disengage from the through hole. One end of the movable plate extends out of the installation cavity, and the pin and the through hole are offset. When unfolding, the movable plate is pressed by the other folding plate and the second spring is compressed, causing the pin to align and pass through the through hole to reset. The locking block automatically falls down to lock the first and second folding plates.

[0007] In the locking structure of the folding plate described above, a cover plate is provided on the opening side of the mounting cavity to block the opening side.

[0008] In the locking structure of the folding plate described above, a first limiting flange is provided in the mounting cavity, and a second limiting flange is provided on the cover plate. The first limiting flange and the second limiting flange together form a channel for the pin to pass through, and the limiting member is limited on the first limiting flange and the second limiting flange.

[0009] In the locking structure of the folding plate described above, the limiting member is a snap ring.

[0010] In the above-mentioned locking structure of a folding plate, the locking block is provided with a plug hole, the wall of the plug hole is provided with a limit ring, the upper end of the pin is provided with a ring groove, the pin is inserted into the plug hole, and the limit ring is provided in the ring groove.

[0011] In the locking structure of the folding plate described above, a protrusion is provided on the outer wall of the locking block to facilitate pulling the locking block upward.

[0012] In the above-mentioned locking structure of a folding plate, a limiting groove is provided in the mounting cavity, and a limiting part is provided at the corresponding end of the movable plate, which extends into the limiting groove. The limiting part moves within the limiting groove to restrict the horizontal movement of the movable plate.

[0013] In the locking structure of the folding plate described above, a spring seat is provided on the movable plate in the horizontal direction, one end of the second spring is sleeved on the spring seat, and the other end abuts against the inner side wall of the mounting cavity opposite to the spring seat.

[0014] In the locking structure of the folding plate described above, the through hole is a strip-shaped hole with its long axis arranged along the moving direction of the movable plate.

[0015] Another object of this utility model is to provide a folding shopping cart that incorporates the locking structure of the aforementioned folding panel.

[0016] The outstanding advantages of this utility model compared to the prior art are: 1. This utility model uses a linkage structure of pin, movable plate and double springs. When the folding plate is unfolded, it can be automatically locked by simply unfolding the two folding plates and guiding the pin to reset by the pressure of the movable plate. When folding, it can be unlocked with one click by pulling up the locking block. It has the advantages of simple operation, reliable locking and compact structure, and provides a good user experience.

[0017] 2. This utility model achieves a concealed design of the pin, movable plate, first spring, and second spring through the cover plate and mounting cavity, making the product appearance simpler and more beautiful, avoiding exposed complex mechanisms, and also reducing the possibility of damage due to external collisions or foreign object intrusion. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is the front view of this utility model; Figure 3 yes Figure 2 AA section view; Figure 4 yes Figure 3 A magnified view of a portion of the image; Figure 5 This is a schematic diagram of the locking structure of this utility model disposed on the first folding plate; Figure 6 This is a schematic diagram of the pin and movable plate of this utility model installed in the mounting cavity; Figure 7 yes Figure 6 A magnified view of a portion of the image; Figure 8 This is a schematic diagram of the movable plate of this utility model; Figure 9 This is a schematic diagram of the mounting cavity of this utility model located on the first folding plate; Figure 10 This is a schematic diagram of the folding shopping cart of this utility model.

[0019] In the diagram: 1. First folding plate; 2. Second folding plate; 3. Locking block; 4. Mounting cavity; 5. Pin; 6. Limiting component; 7. First spring; 8. Movable plate; 9. Second spring; 10. Through hole; 11. Cover plate; 12. First limiting flange; 13. Second limiting flange; 14. Annular groove; 15. Protrusion; 16. Limiting groove; 17. Limiting part; 18. Spring seat. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments: Example 1: See Figure 1-10 : This utility model provides a locking structure for a folding plate. The locking structure includes a first folding plate 1 and a second folding plate 2 hinged together, and a locking block 3 for locking the two. An installation cavity 4 is provided at the end of the first folding plate 1 or the second folding plate 2. A pin 5 is vertically movably disposed within the installation cavity 4, with its upper end extending out of the installation cavity 4 and connecting to the locking block 3. A limiting member 6 is provided on the pin 5. A first spring 7 is fitted onto the pin 5 between the top wall of the installation cavity 4 and the limiting member 6. A movable plate 8 is horizontally disposed within the installation cavity 4, and the movable plate 8 is connected to the locking block 3 by a second spring 9. The side wall of cavity 4 is elastically connected, and the other end can extend out of the mounting cavity 4 under the elastic force of the second spring 9. The movable plate 8 is provided with a through hole 10 for the pin 5 to pass through. When folding, the locking block 3 is pulled up and the first spring 7 is compressed, which drives the pin 5 to move up and disengage from the through hole 10. One end of the movable plate 8 extends out of the mounting cavity 4 under the action of the second spring 9. The pin 5 is staggered from the through hole 10. When unfolding, the movable plate 8 is squeezed by another folding plate and the second spring 9 is compressed, so that the pin 5 is aligned and passes through the through hole 10 to reset. The locking block 3 automatically falls down to lock the first folding plate 1 and the second folding plate 2.

[0021] This utility model utilizes a linkage structure of pin 5, movable plate 8, and double springs. When the folding plate is unfolded, the movable plate 8 is pressed to guide the pin 5 to reset, achieving automatic locking. When folded, the locking block 3 is pulled up to achieve one-button unlocking. It has the advantages of simple operation, reliable locking, and compact structure, making it convenient to operate and providing a good user experience.

[0022] In this embodiment, the through hole 10 is preferably a strip-shaped hole with its long axis arranged along the moving direction of the movable plate 8. The strip-shaped hole provides a larger moving space in the horizontal direction than the diameter of the pin 5. This can compensate for the machining tolerances of the parts and the cumulative assembly errors. When the movable plate 8 is pushed back, even if there is a slight deviation in position, the pin 5 can fall into the strip-shaped hole under the elastic force of the first spring 7, which greatly improves the success rate of locking and the yield rate of the product.

[0023] Furthermore, a cover plate 11 is provided on one side of the opening of the mounting cavity 4 to seal the opening. The cover plate 11 and the mounting cavity 4 achieve a concealed design for the pin 5, the movable plate 8, the first spring 7, and the second spring 9, making the product appearance simpler and more beautiful, avoiding exposed complex mechanisms, and also reducing the possibility of damage due to external collisions or foreign object intrusion.

[0024] To limit the positioning of the limiting member 6, a first limiting flange 12 is provided in the mounting cavity 4 of this invention, and a second limiting flange 13 is provided on the cover plate 11. The first limiting flange 12 and the second limiting flange 13 together form a channel for the pin 5 to pass through, and the limiting member 6 is limited on the first limiting flange 12 and the second limiting flange 13. When the folding plate is unfolded, the limiting member 6 abuts against the first limiting flange 12 and the second limiting flange 13 under the spring force of the first spring 7. In this embodiment, the limiting member 6 is a retaining spring; specifically, an annular groove is provided at a corresponding position on the pin 5, and the retaining spring is engaged in the annular groove. Alternatively, a retaining ring or the like can be used instead of a retaining spring.

[0025] Furthermore, the connection structure between the locking block 3 and the pin 5 is as follows: the locking block 3 is provided with a insertion hole, and a limiting ring is provided on the wall of the insertion hole. The upper end of the pin 5 is provided with an annular groove 14. The pin 5 is inserted into the insertion hole, and the limiting ring is located in the annular groove 14. Alternatively, the two can be connected by means of glue or other methods after insertion.

[0026] To facilitate pulling up the locking block 3 and prevent slippage, a raised strip 15 is provided on the outer wall of the locking block 3. Friction can also be increased by setting raised dots.

[0027] In order to limit the travel of the movable plate 8, the present invention provides a limiting groove 16 in the mounting cavity 4, and a limiting part 17 extending into the limiting groove 16 is provided at the corresponding end of the movable plate 8. The limiting part 17 moves within the limiting groove 16 to limit the horizontal travel of the movable plate 8.

[0028] This utility model also provides a spring seat 18 horizontally on the movable plate 8, with one end of the second spring 9 sleeved on the spring seat 18 and the other end abutting against the inner side wall of the mounting cavity 4 opposite to the spring seat 18.

[0029] Example 2: This embodiment provides a folding shopping cart having the locking structure of the folding panel described above.

[0030] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A locking structure of folding plates, comprising a first folding plate (1), a second folding plate (2) hinged to each other, and a locking block (3) for locking both, characterized in that: The first folding plate (1) or the second folding plate (2) is provided with an installation cavity (4) at its end. A pin (5) is vertically movably arranged in the installation cavity (4). The upper end of the pin (5) extends out of the installation cavity (4) and is connected to the locking block (3). A limiter (6) is provided on the pin (5). A first spring (7) is fitted on the pin (5) between the top wall of the installation cavity (4) and the limiter (6). A movable plate (8) is horizontally movably arranged in the installation cavity (4). One end of the movable plate (8) is elastically connected to the side wall of the installation cavity (4) through a second spring (9), and the other end is elastically connected to the second spring (9). The movable plate (8) extends out of the mounting cavity (4) and has a through hole (10) for the pin (5) to pass through. When folded, the locking block (3) is pulled up and the first spring (7) is compressed, which causes the pin (5) to move up and disengage from the through hole (10). One end of the movable plate (8) extends out of the mounting cavity (4) and the pin (5) is staggered from the through hole (10). When unfolded, the movable plate (8) is squeezed by another folding plate and the second spring (9) is compressed, so that the pin (5) is aligned and passes through the through hole (10) to reset. The locking block (3) automatically falls down to lock the first folding plate (1) and the second folding plate (2).

2. The folding board locking structure according to claim 1, wherein: The opening side of the mounting cavity (4) is provided with a cover plate (11) that blocks the opening side.

3. The folding board locking structure according to claim 2, wherein: The mounting cavity (4) is provided with a first limiting flange (12), and a second limiting flange (13) is provided on the cover plate (11). The first limiting flange (12) and the second limiting flange (13) together form a channel for the pin (5) to pass through. The limiting member (6) is limited on the first limiting flange (12) and the second limiting flange (13).

4. The folding board locking structure according to claim 1 or 2 or 3, characterized in that: The limiting component (6) is a retaining ring.

5. The folding board locking structure according to claim 1 or 2 or 3, wherein: The locking block (3) is provided with a plug hole, and a limit ring is provided on the wall of the plug hole. The upper end of the pin (5) is provided with an annular groove (14). The pin (5) is inserted into the plug hole, and the limit ring is provided in the annular groove (14).

6. The folding board locking structure according to claim 1, wherein: The outer wall of the locking block (3) is provided with a protrusion (15) to facilitate pulling the locking block (3) upward.

7. The folding board locking structure according to claim 1, wherein: The mounting cavity (4) is provided with a limiting groove (16), and the corresponding end of the movable plate (8) is provided with a limiting part (17) that extends into the limiting groove (16). The limiting part (17) moves within the limiting groove (16) to restrict the horizontal movement of the movable plate (8).

8. The folding board locking structure according to claim 1 or 7, wherein: A spring seat (18) is provided horizontally on the movable plate (8). One end of the second spring (9) is sleeved on the spring seat (18), and the other end abuts against the inner wall of the mounting cavity (4) opposite to the spring seat (18).

9. The folding board locking structure according to claim 1, wherein: The through hole (10) is a strip-shaped hole set along the moving direction of the long axis of the movable plate (8).

10. A folding shopping cart, characterized by: Including the locking structure of a folding plate as described in any one of claims 1-9.

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