Foldable seat backrest unlocking mechanism

Abstract

The utility model belongs to the technical field of small car seats, and particularly relates to a foldable seat backrest unlocking mechanism which comprises an unlocking mechanism, the unlocking mechanism comprises a backrest, an unlocking blanking cap and a seat cushion framework, the backrest is connected with the seat cushion framework, and the seat cushion framework is connected with a seat cushion body; an unlocking blanking cap and a double nipple bolt are arranged at one end of the seat cushion framework, a spring is fixedly installed in the backrest, and the spring is located in the sliding key; the folding function is achieved, meanwhile, the unfolding and folding locking states are considered, when a person sits on the trolley, the backrest can be pushed to achieve movement of the trolley, and meanwhile the convenience in the carrying process after the seat is folded is improved. Meanwhile, the sliding keys are in threaded connection with the grooves of the backrest and the seat framework, the boundaries of the grooves of the backrest and the seat framework are positioned through the boundaries of the sliding keys, the positioning precision is improved, and the machining difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of small car seat technology, specifically a foldable seat back unlocking mechanism. Background Technology

[0002] Small car seats are movable seats with wheels. They are moved by a drive system that powers the wheels, thus moving the person in the seat. Small car seats are advantageous due to their small size and light weight, making them convenient for use in urban areas.

[0003] Currently, many small mobility scooters on the market have backrests that are difficult to fold, and even when folded, it is difficult to maintain the seat's posture, causing the backrest to bend easily due to pushing force. For example, when someone is sitting in a small mobility scooter, it is difficult for someone behind to push the scooter. Therefore, a foldable seat back unlocking mechanism is proposed to address the above problems. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes a foldable seat back unlocking mechanism.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The present utility model provides a foldable seat back unlocking mechanism, which includes an unlocking mechanism, a backrest, an unlocking plug, and a seat cushion frame. The backrest is connected to the seat cushion frame, and the seat cushion frame is connected to the seat cushion body. One end of the seat cushion frame is provided with an unlocking plug and a threaded bolt. A spring is fixedly installed inside the backrest, and the spring is located inside a sliding key. The backrest has a groove that matches the sliding key. The threaded bolt passes through the backrest, the seat cushion frame, and the spring to lock and fix it to the sliding key.

[0006] Furthermore, a gap is formed between the surface of the slide key and the inner plane of the hole in the backrest and seat cushion frame.

[0007] Furthermore, a rubber pad is fixedly installed inside the seat cushion frame, and the rubber pad abuts against the backrest.

[0008] Furthermore, the surface of the unlocking plug is provided with locking feet, and the unlocking plug is connected to the seat cushion frame by snap-fit.

[0009] Furthermore, the backrest is arc-shaped, and the surface of the seat cushion is made of a non-slip material.

[0010] Furthermore, both the backrest and the seat cushion frame are integrally molded.

[0011] Furthermore, the backrest has an irregular shape, and one side of the backrest has several grooves of varying depths.

[0012] Furthermore, the slide key has an irregular shape and protrusions are provided on it.

[0013] Furthermore, the backrest, seat frame, and seat body are all made of lightweight materials.

[0014] Furthermore, a flexible seat cushion is attached to the top of the seat cushion body via Velcro, and the seat cushion on the seat cushion body is inclined.

[0015] The advantages of this utility model are:

[0016] 1. This utility model, while possessing a folding function, also considers unfolded and folded locked states. When a person is sitting on the trolley, the backrest can be pushed to move the trolley, improving the convenience of transporting the folded seat. Furthermore, it utilizes a sliding key that is screwed into the grooves of the backrest and seat frame, using the boundary of the sliding key to position the boundaries of the grooves on the backrest and seat frame, improving positioning accuracy and reducing manufacturing difficulty. It also utilizes the compression characteristics of a spring; pressing the unlocking cap compresses the spring via the sliding key, and the spring's rebound moves the sliding key, which slides within the grooves of the backrest and seat frame to complete locking and unlocking.

[0017] 2. The end face of the sliding key in this utility model has a very small gap with the inner face of the hole in the backrest and seat cushion frame. This gap is designed to absorb machining and assembly errors, simplifying the overall structure and reducing the number of parts. The structure is integrated into the overall design, while improving installation quality. The rubber pad is installed on the backrest to provide a reaction force for unlocking the backrest, further simplifying the structure. The unlocking plug is installed on the seat frame via its own locking feet, simultaneously pressing the sliding key. The overall structure is compact, with fewer parts, reducing assembly errors. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the backrest in this utility model;

[0020] Figure 2 This is a front view structural diagram of the backrest in this utility model;

[0021] Figure 3 This is a side view of the backrest structure in this utility model;

[0022] Figure 4 This is a utility model Figure 2 Schematic diagram of the cross-sectional structure along AA;

[0023] Figure 5 This is a utility model Figure 2 Schematic diagram of the cross-sectional structure along BB;

[0024] Figure 6 This is a side view of the seat cushion body in this utility model.

[0025] Figure 7 This is a utility model Figure 3 Schematic diagram of the cross-sectional structure along CC;

[0026] Figure 8 This is a utility model Figure 6 A schematic diagram of the cross-sectional structure along DD.

[0027] In the diagram: 1. Backrest; 2. Unlocking cover; 3. Seat cushion frame; 4. Seat cushion body; 5. Threaded bolt; 6. Spring; 7. Slide key; 8. Rubber pad. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] Please see Figure 1-8 As shown, a foldable seat back unlocking mechanism includes an unlocking mechanism comprising a backrest 1, an unlocking plug 2, and a seat cushion frame 3. The backrest 1 is connected to the seat cushion frame 3, and the seat cushion frame 3 is connected to the seat cushion body 4. One end of the seat cushion frame 3 is provided with an unlocking plug 2 and a threaded bolt 5. A spring 6 is fixedly installed inside the backrest 1, and the spring 6 is located inside a sliding key 7. The backrest 1 has a groove that matches the sliding key 7. The threaded bolt 5 passes through the backrest 1, the seat cushion frame 3, and the spring 6 and is locked and fixed to the sliding key 7.

[0030] Specifically, a gap is formed between the surface of the sliding key 7 and the inner plane of the holes in the backrest 1 and seat cushion frame 3. A rubber pad 8 is fixedly installed inside the seat cushion frame 3, and the rubber pad 8 abuts against the backrest 1. The surface of the unlocking cover 2 is provided with a locking foot, and the unlocking cover 2 is connected to the seat cushion frame 3 by a locking mechanism. The backrest 1 is arc-shaped, and the surface of the seat cushion body 4 is made of non-slip material. Both the backrest 1 and the seat cushion frame 3 are integrally molded designs.

[0031] Specifically, the backrest 1 has an irregular shape, with several grooves of varying depths on one side. The slide key 7 also has an irregular shape and protrusions. The backrest 1, seat frame 3, and seat body 4 are all made of lightweight materials. A flexible seat cushion is attached to the top of the seat body 4 via Velcro, and the seat cushion on the seat body 4 is angled.

[0032] During operation, it is important to note that: there is a very small gap between the end face of the slide key 7 and the inner face of the holes in the backrest 1 and seat cushion frame 3. This gap is designed to absorb machining and assembly errors, simplifying the overall structure and integrating it into the design, while also improving installation quality. The rubber pad 8 is installed on the backrest 1 to provide a reaction force for unlocking the backrest 1, further simplifying the structure. The unlocking plug 2 is installed on the seat frame via its own locking feet, simultaneously pressing the slide key 7. The overall structure is compact, with fewer parts, reducing assembly errors.

[0033] When a person presses the unlocking cap 2, it causes the sliding key 7 to move within the groove of the backrest 1. Under the action of the rubber pad 8, the backrest 1 is opened, and the backrest 1 is unlocked. During the rotation of the backrest 1 around the threaded bolt 5, the sliding key 7 is reset under the action of the spring 6, and the backrest 1 completes its folding and locking function. When the backrest 1 is folded, it interferes with the seat cushion body 4. When a person presses the unlocking cap 2, it causes the sliding key 7 to move within the groove of the backrest 1. Under the action of the seat cushion body 4, the backrest 1 is opened, and the backrest 1 is unlocked. During the rotation of the backrest 1 around the threaded bolt 5, the sliding key 7 is reset under the action of the spring 6, and the backrest 1 completes its unfolding and locking function.

[0034] The structure designed in this application not only provides a folding function but also considers unfolded, folded, and locked states. When a person is sitting on the trolley, the backrest 1 can be pushed to move the trolley, improving the convenience of transporting the folded seat. Furthermore, the sliding key 7 is screwed into the grooves of the backrest 1 and seat frame, using the boundary of the sliding key 7 to position the boundaries of the grooves of the backrest 1 and seat frame, improving positioning accuracy and reducing manufacturing difficulty. The compression characteristics of the spring 6 are also utilized; pressing the unlocking plug 2 causes the sliding key 7 to compress the spring 6, and the compressed spring 6 rebounds, moving the sliding key 7. Locking and unlocking are achieved by the sliding key 7 sliding within the grooves of the backrest 1 and seat frame.

[0035] Working principle: When a person presses the unlocking cap 2, it causes the sliding key 7 to move in the groove of the backrest 1. Under the action of the rubber pad 8, the backrest 1 is opened, and the backrest 1 is unlocked. During the rotation of the backrest 1 around the threaded bolt 5, the sliding key 7 is reset under the action of the spring 6, and the backrest 1 completes the folding and locking function. When the backrest 1 is folded, it interferes with the seat cushion body 4. When a person presses the unlocking cap 2, it causes the sliding key 7 to move in the groove of the backrest 1. Under the action of the seat cushion body 4, the backrest 1 is opened, and the backrest 1 is unlocked. During the rotation of the backrest 1 around the threaded bolt 5, the sliding key 7 is reset under the action of the spring 6, and the backrest 1 completes the unfolding and locking function.

[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A foldable seat back unlocking mechanism, characterized in that: It includes an unlocking mechanism, which includes a backrest (1), an unlocking plug (2), and a seat cushion frame (3). The backrest (1) is connected to the seat cushion frame (3), and the seat cushion frame (3) is connected to the seat cushion body (4). One end of the seat cushion frame (3) is provided with an unlocking plug (2) and a threaded bolt (5). A spring (6) is fixedly installed inside the backrest (1). The spring (6) is located inside the slide key (7). The backrest (1) has a groove that matches the slide key (7). The threaded bolt (5) passes through the backrest (1), the seat cushion frame (3), and the spring (6) and locks and fixes itself to the slide key (7).

2. The foldable seat back unlocking mechanism according to claim 1, characterized in that: The surface of the slide key (7) has a gap with the inner plane of the holes in the backrest (1) and the seat frame (3).

3. The foldable seat back unlocking mechanism according to claim 1, characterized in that: A rubber pad (8) is fixedly installed inside the seat cushion frame (3), and the rubber pad (8) abuts against the backrest (1).

4. The foldable seat back unlocking mechanism according to claim 1, characterized in that: The surface of the unlocking plug (2) is provided with locking feet, and the unlocking plug (2) is connected to the seat cushion frame (3) by locking.

5. The foldable seat back unlocking mechanism according to claim 1, characterized in that: The backrest (1) is arc-shaped, and the surface of the seat cushion body (4) is made of non-slip material.

6. The foldable seat back unlocking mechanism according to claim 1, characterized in that: The backrest (1) and the seat cushion frame (3) are both integrally molded.

7. The foldable seat back unlocking mechanism according to claim 1, characterized in that: The backrest (1) has an irregular shape, and one side of the backrest (1) has several grooves of varying depths.

8. The foldable seat back unlocking mechanism according to claim 1, characterized in that: The slide key (7) has an irregular shape and protrusions.

9. The foldable seat back unlocking mechanism according to claim 1, characterized in that: The backrest (1), seat frame (3) and seat body (4) are all made of lightweight materials.

10. The foldable seat back unlocking mechanism according to claim 1, characterized in that: A flexible seat cushion is attached to the top of the seat cushion body (4) via Velcro, and the seat cushion on the seat cushion body (4) is inclined.

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