Backrest dismounting and mounting structure and seat

Abstract

The utility model belongs to the technical field of household seats, and particularly relates to a backrest dismounting and mounting structure and a seat. The backrest dismounting and mounting structure comprises a mounting piece, a mounting base, a reset spring and a locking pin. Wherein the reset spring is provided with a fixed end far away from the mounting base and a deformation end close to the mounting base, and the rebound direction of the reset spring is staggered with the mounting direction of the mounting piece; the locking pin is connected with the deformation end and moves in the compression direction and the rebound direction of the reset spring. A locking groove is formed in the mounting piece; during installation, the reset spring is compressed firstly, the reset spring rebounds after the locking groove moves to the motion trail of the locking pin, the locking pin is pushed into the locking groove by the reset spring, and locking is completed. The locking pin is further provided with a first limiting part for limiting the locking groove to move in the direction opposite to the installation direction, and the installed installation piece is prevented from retreating from the installation base. According to the utility model, the seat can be quickly assembled without the assistance of a toolkit, and the assembly is simple and convenient.

Description

Technical Field

[0001] This utility model belongs to the field of seat technology, specifically relating to a backrest disassembly and assembly structure and a seat. Background Technology

[0002] To reduce warehousing and logistics costs, vendors typically ship car seats in individual parts, along with an installation kit, which users then assemble themselves upon arrival. The installation kit usually includes various types of nuts, screws, and hex wrenches, which vendors may easily omit during shipping, requiring users to identify and distinguish them during assembly, which is time-consuming. Utility Model Content

[0003] In view of this, the present invention aims to provide a backrest disassembly and assembly structure and a seat that can be quickly assembled without the aid of a tool kit.

[0004] This utility model is achieved through the following technical solution:

[0005] A backrest detachable structure, characterized in that it includes:

[0006] The mounting component includes a rod-shaped positioning part, and the rod-shaped positioning part has an insertion end on one side along the installation direction;

[0007] The mounting base has a suitable receiving cavity for accommodating the rod-shaped positioning part, and the receiving cavity includes at least one open mounting port for the rod-shaped positioning part to enter.

[0008] Locking component, the locking component comprising:

[0009] The return spring includes a fixed end away from the mounting base and a deformable end close to the mounting base; the return direction of the return spring is opposite to the mounting direction of the mounting member.

[0010] A locking pin is connected to the deformed end; the locking pin has a movement trajectory that conforms to the compression direction and the rebound direction of the return spring;

[0011] The rod-shaped positioning part is provided with a locking groove, the depth direction of which is in line with the rebound direction of the return spring; the locking pin has a first limiting part that limits the movement of the locking groove in the opposite direction of the installation direction.

[0012] This solution proposes an installation structure based on spring return performance, enabling rapid installation and connection. The mounting component and mounting base are respectively mounted on different seat components. During installation, the insertion end of the mounting component enters the receiving cavity of the mounting base through the installation port; the return spring is first compressed, and then springs back when the locking groove moves onto the movement trajectory of the locking pin. Since the depth direction of the locking groove aligns with the return direction of the return spring, the locking pin will spring into the locking groove under the push of the return spring, completing the locking. Due to the restriction of the first limiting part, the mounting component cannot retract in the reverse direction along the installation direction, thus completing the installation.

[0013] Preferably, the insertion end is provided with a guide slope that is inclined in accordance with the installation direction; the locking pin has an active path during the installation process, which is triggered by the guide slope touching the locking pin.

[0014] This solution further proposes a structure that allows the return spring to automatically compress during installation. The guide ramp is inclined in accordance with the installation direction, and during installation, the guide ramp has a corresponding travel area. When not installed, the front end of the locking pin is located within the travel area of ​​the guide ramp. During installation, as the rod-shaped positioning part moves, the guide ramp contacts the front end of the locking pin, which then moves under its push and is gradually pushed out of the receiving cavity. During this process, the return spring is compressed as the locking pin is pushed out. This further simplifies the installation operation; the user can simply insert the mounting part into the mounting base to complete the installation and locking.

[0015] Preferably, the locking assembly further includes an interceptor, which is disposed on the movement trajectory of the locking pin and has an intercepting surface that restricts the movement of the locking pin along the return direction of the reset spring; the locking pin is provided with a locking portion that engages with the intercepting surface for interception.

[0016] When the return spring has a large rebound force, the locking pin may enter the mounting base along with the deformed end of the return spring. Furthermore, the wobbling of the return spring during rebound may cause the gap in the spring body to engage with the side wall of the mounting base. Therefore, this solution limits the maximum rebound position of the locking pin by incorporating an interceptor to prevent excessive rebound.

[0017] Preferably, the accommodating cavity has a calibration surface that limits the deviation of the rod-shaped positioning portion from the installation direction.

[0018] During installation, the calibration surface of the accommodating cavity can guide the installation direction of the rod-shaped positioning part. After installation, the calibration surface can prevent the connection of the mounting parts from becoming loose.

[0019] Preferably, the locking pin has a second limiting part that limits the movement of the locking groove along the installation direction.

[0020] The second limiting part cooperates with the first limiting part to prevent the mounting part from shaking in both directions in the installation direction.

[0021] Preferably, the insertion end has a chamfer.

[0022] The chamfer at the insertion end guides the mounting component as it enters the mounting base, reducing the difficulty for the user in aligning the mounting component with the base.

[0023] Preferably, the opening of the locking groove and / or the front end of the locking pin are chamfered.

[0024] The chamfer at the opening of the locking slot guides the locking pin as it enters the locking slot, reducing the difficulty for the user to align the locking pin and the locking slot.

[0025] A chair with a backrest includes a seat and a detachable backrest, characterized in that the backrest and the seat are connected by a disassembly and assembly structure as described in any of the preceding claims.

[0026] Preferably, the mounting component is shaped to define the relative angle between the backrest and the seat.

[0027] Preferably, the locking groove is disposed adjacent to the guide slope.

[0028] When operating alone, the unlocking actions of multiple backrest disassembly and assembly structures can only be performed sequentially and are difficult to perform simultaneously. However, when other backrest disassembly and assembly structures are not unlocked, the sliding range of the rod-shaped positioning part in the accommodating cavity is very limited, making unlocking difficult. This solution sets the locking groove and the guide slope adjacent to each other. After the locking pin exits the locking groove, the rod-shaped positioning part can be slightly slid to allow the locking pin to enter the guide slope area and remain in the unlocked state. At this time, the user can then unlock the next backrest disassembly and assembly structure.

[0029] This invention proposes a backrest assembly / disassembly structure. Firstly, the installation method is simple; the user only needs to insert the mounting component into the mounting base, and the guide ramp and return spring automatically engage to engage the locking pin in the locking groove, requiring no learning curve. Secondly, this structure features multiple chamfered guide structures for self-alignment, eliminating the need for precise user operation or control and reducing installation time. Furthermore, the connection is stable and reliable, with no wobbling between the mounting component and the mounting base after connection. This invention allows users to easily, quickly, and accurately assemble seat components without tool assistance, greatly enhancing the user experience. Attached Figure Description

[0030] Figure 1 This is a schematic diagram showing the fit between the mounting component and the mounting base.

[0031] Figure 2 This is a schematic diagram showing the fit between the fixing component and the fixing box;

[0032] Figure 3 This is a schematic diagram of the mounting base;

[0033] Figure 4 This is a schematic diagram of the return spring in its spring-back state;

[0034] Figure 5 This is a schematic diagram of the return spring in its compressed state.

[0035] Legend:

[0036] 1. Mounting component, 110. Rod-shaped positioning part, 120. Insertion end, 121. Guide slope, 130. Locking groove, 140. Transition part, 150. Connecting part;

[0037] 2. Mounting base, 210. Receiving cavity, 211. Mounting port, 212. Reinforcing structure, 213. Calibration surface, 220. Fixing box;

[0038] 3. Return spring; 310. Fixed end; 320. Deformation end;

[0039] 4 locking pins, 410 front end, 420 rear end, 430 locking part, 440 first limit part, 450 second limit part;

[0040] 5. Interceptor, 510. Bushing, 511. Far seat end, 512. Near seat end, 520. Fixing surface, 521. Through hole, 530. Fixing seat, 540. Interceptor surface. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Those skilled in the art will be able to implement the present invention based on these descriptions. Furthermore, the embodiments of the present invention described below are generally only a part of the embodiments of the present invention, and not all of the embodiments. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0042] Example 1

[0043] This embodiment is a backrest assembly / disassembly structure for a seat.

[0044] Please see Figure 1This backrest assembly / disassembly structure includes a mounting component 1, a mounting base 2, and a locking assembly. The locking assembly includes a locking pin 4 and a return spring 3. The mounting component 1 includes a connecting part 150 for connection with other seat components, and a rod-shaped positioning part 110. The mounting base 2 is a hollow structure with an internal accommodating cavity 210. The accommodating cavity 210 has an installation port 211 for the rod-shaped positioning part 110 to enter. Part of the inner wall of the accommodating cavity 210 can fit tightly against the rod-shaped positioning part 110, limiting the range of motion of the rod-shaped positioning part 110. A locking groove 130 is provided on the rod-shaped positioning part 110.

[0045] The return spring 3 includes a fixed end 310 and a deformable end 320, wherein the fixed end 310 is located away from the mounting base 2, and the deformable end 320 is located close to the mounting base 2 and connected to the locking pin 4. The rebound direction of the return spring 3 is offset from the installation direction of the mounting member 1; when the return spring 3 is compressed, the locking pin 4, along with the deformable end 320, exits or moves away from the receiving cavity 210; when the return spring 3 rebounds, the locking pin 4, along with the deformable end 320, approaches or enters the receiving cavity 210.

[0046] The return direction of the return spring 3 is the same as the depth direction of the locking groove 130. When the locking groove 130 moves along with the rod-shaped positioning part 110 to the return trajectory of the locking pin 4, the return spring 3 springs into the locking groove 130 under the push of the return spring 3. The locking pin 4 has a first limiting part 440 that limits the movement of the locking groove 130 in the opposite direction of the installation direction. If the rod-shaped positioning part is directly pulled out of the receiving cavity 210, the inner wall of the locking groove 130 will be blocked by the first limiting part 440, and the mounting part 1 will be locked inside the mounting base 2.

[0047] The aforementioned structure requires manual compression of the return spring 3 during installation. Users need to control the locking pin 4 with one hand and the mounting component 1 with the other, making the operation cumbersome. Therefore, the structure is further optimized to allow the return spring 3 to compress automatically during installation.

[0048] Please see Figure 2 The rod-shaped positioning part 110 has a guide slope 121 on its insertion end 120, which is inclined in the installation direction. During installation, the guide slope 121 has a corresponding travel area. When not installed, the front end 410 of the locking pin 4 is located in the travel area of ​​the guide slope 121. During installation, as the rod-shaped positioning part 110 moves, the guide slope 121 comes into contact with the front end 410 of the locking pin 4. The locking pin 4 begins to move under its push and is gradually pushed out of the receiving cavity 210. During this process, the return spring 3 is compressed as the locking pin 4 is pushed out.

[0049] When the return spring 3 has a large rebound force, the locking pin 4 may enter the mounting base 2 along with the deformed end 320 of the return spring 3. Furthermore, the wobbling of the return spring 3 during its rebound may cause the gap in the spring body to engage with the side wall of the mounting base 2, thus blocking the extension and retraction of the return spring 3. Therefore, this solution limits the maximum rebound position of the locking pin 4 by setting the interceptor 5 to prevent excessive rebound.

[0050] In this embodiment, the interceptor 5 is a component formed by the cooperation of multiple structures.

[0051] Please see Figure 2 The interceptor 5 includes a bushing 510 and a fixing seat 530. A fixing box 220 is provided on the outside of the mounting base 2 to provide mounting points for the fixing seat 530. The bushing 510 is threaded onto the fixing seat 530 on its outer surface. The fixing box 220 itself is connected to the mounting base 2 through a mounting port 211.

[0052] Please see Figure 4 , Figure 5 A locking pin 4 is externally nested with a return spring 3, and the return spring 3 is externally nested with a bushing 510. The bushing 510 includes a distal end 511 away from the mounting base 2 and a proximal end 512 close to the mounting base 2. The distal end 511 has a pair of fixed surfaces 520 and intercepting surfaces 540 facing opposite directions. The fixed end 310 of the return spring 3 is connected to the fixed surface 520, while the locking pin 4 passes through the through hole 521 at the center of the fixed surface 520 and reaches the position of the intercepting surface 540. On the side of the intercepting surface 540, the locking pin 4 is provided with an engaging part 430. The size of the engaging part 430 cannot pass through the through hole 521, and therefore cannot return to the side of the fixed surface 520. The engaging part 430 can only move on the side of the intercepting surface 540, and the range of movement is limited by the extension and retraction of the return spring 3. Since the engaging part and the front end of the locking pin are a single unit, the front end of the locking pin can only move within a fixed range to avoid excessive insertion into the receiving cavity.

[0053] When the engaging part 430 is positioned at the rear end 420 of the locking pin, the engaging part 430 is designed as a pull ring. While performing the limiting function, the user can operate the pull ring to control the locking pin 4 to enter or exit the locking groove 130.

[0054] As an installation structure for seat components, this solution should not only have a connection locking function, but also prevent the connection from loosening or shaking.

[0055] Please see Figure 3The accommodating cavity 210 has a calibration surface 213 that restricts the rod-shaped positioning part 110 from deviating from the installation direction. In this embodiment, the calibration surface 213 is located on the upper and lower sides of the rod-shaped positioning part 110; during installation, the calibration surface 213 is in close contact with the upper and lower surfaces of the rod-shaped positioning part 110, guiding the installation direction of the rod-shaped positioning part 110; after installation, the calibration surface 213 prevents the mounting part 1 from shaking in the vertical direction due to the user's leaning action.

[0056] Please see Figure 2 The locking pin 4 has a second limiting part 450 that limits the movement of the locking groove 130 along the installation direction. The first limiting part 440 restricts the mounting member 1 from exiting the mounting base 2, while the second limiting part 450 prevents the mounting member 1 from being over-inserted into the mounting base 2. The two parts cooperate to prevent the mounting member 1 from wobbling in both directions in the installation direction.

[0057] When this backrest assembly / disassembly structure is used as a connection structure between the seat back and the seat, the connecting portion 150 of the mounting member 1 bears the pressure of the user leaning against it and tends to rotate downwards; at this time, the rod-shaped positioning portion 110 located on the other side of the mounting member 1 tends to tilt upwards and applies pressure to the mounting base 2. Therefore, as Figure 3 As shown, this solution provides multiple sets of reinforcing ribs as reinforcement structures 212 at the side wall of the mounting base 2 and the mounting opening 211 to improve durability.

[0058] This backrest assembly / disassembly structure contains two sets of structures that need to be aligned: the insertion end 120 and the mounting port 211, and the locking pin 4 and the locking groove 130. To save users time during the alignment process, a guide structure is provided at the alignment points to assist in alignment.

[0059] Please see Figure 2 The insertion end 120 of the mounting component 1 is provided with a guide slope 121, and the opposite side of the guide slope 121 is provided with a chamfer. During the process of inserting the mounting component 1 into the mounting base 2, the chamfer and the guide slope 121 guide the mounting component 1 to move along the correct installation direction. The opening edge of the locking groove 130 is provided with a chamfer, and the front end 410 of the locking pin 4 is also provided with a chamfer. When the locking groove 130 and the locking pin 4 are not fully aligned axially, the chamfers on the locking groove 130 and the locking pin 4 can help them to align and automatically engage.

[0060] Example 2

[0061] This embodiment is a chair, including a detachable seat and a seat back. The seat and seat back are connected by multiple sets of the backrest disassembly and assembly structures described in Embodiment 1, wherein the connecting part 150 of the mounting component 1 is welded and fixed to the seat back frame, and the mounting base 2 and the external fixing box 220 are welded and fixed to the seat frame. The rod-shaped positioning part 110, transition part 140, and connecting part 150 of the mounting component 1 are sequentially connected to form a turning structure, which is used to determine the installation angle between the seat back and the seat.

[0062] When operated by a single person, the unlocking actions of multiple backrest disassembly and assembly structures can only be performed sequentially and are difficult to perform simultaneously. However, when other backrest disassembly and assembly structures are not unlocked, the sliding range of the rod-shaped positioning part 110 within the accommodating cavity 210 is very limited, making unlocking difficult.

[0063] Please see Figure 2 In this embodiment, the locking groove 130 and the guide slope 121 are arranged adjacent to each other. After the locking pin 4 exits the locking groove 130, the locking pin 4 can enter the guide slope 121 area by slightly sliding the rod-shaped positioning part 110 and remain in the unlocked state. At this time, the user can unlock the next backrest assembly / disassembly structure.

[0064] When a user needs to install a seat, simply align the insertion end 120 of the mounting part 1 roughly with the mounting port 211, slide the rod-shaped positioning part 110 into the receiving cavity 210, and when the locking groove 130 is aligned with the locking pin 4, the return spring 3 will spring the locking pin 4 into the locking groove 130, and the installation is complete.

[0065] When a user needs to remove the seat, first pull the pull ring outward to disengage the locking pin 4 from the locking groove 130, then pull the rod-shaped positioning part 110 outward slightly to align the locking pin 4 with the guide slope 121 area, thereby unlocking the mounting structure; perform the above operation on multiple mounting structures in sequence, and after all mounting structures are unlocked, the mounting part 1 can be pulled out from the mounting base 2.

Claims

1. A backrest detachable structure, characterized in that, include: Mounting component (1), the mounting component (1) includes a rod-shaped positioning part (110), the rod-shaped positioning part (110) has an insertion end (120) on one side along the installation direction. Mounting base (2), wherein the mounting base (2) has a suitable receiving cavity (210) for accommodating the rod-shaped positioning part (110), and the receiving cavity (210) includes at least one open mounting port (211) for the rod-shaped positioning part (110) to enter. Locking component, the locking component comprising: The return spring (3) includes a fixed end (310) away from the mounting base (2) and a deformable end (320) close to the mounting base (2); the return direction of the return spring (3) is intersected with the mounting direction of the mounting member (1); The locking pin (4) is connected to the deformed end (320), and the locking pin (4) has a movement trajectory that conforms to the compression direction and the rebound direction of the return spring (3); The rod-shaped positioning part (110) is provided with a locking groove (130), the depth direction of the locking groove (130) is in line with the springback direction of the return spring (3); the locking pin (4) has a first limiting part (440) that limits the movement of the locking groove (130) in the opposite direction of the installation direction.

2. The backrest detachment structure according to claim 1, characterized in that, The insertion end (120) is provided with a guide slope (121) that is inclined in accordance with the installation direction; the locking pin (4) has an active path during the installation process, which is triggered by the guide slope (121) touching the locking pin (4).

3. The backrest disassembly structure according to claim 2, characterized in that, The locking assembly further includes an interceptor (510), which is disposed on the movement trajectory of the locking pin (4) and has an intercepting surface (540) that restricts the movement of the locking pin (4) along the springback direction of the return spring (3); the locking pin (4) is provided with a locking part (430) that engages with the intercepting surface (540) for interception.

4. The backrest detachment structure according to claim 1, characterized in that, The accommodating cavity (210) has a calibration surface (213) that restricts the rod-shaped positioning part (110) from deviating from the installation direction.

5. The backrest disassembly structure according to claim 1, characterized in that, The locking pin (4) has a second limiting part (450) that limits the movement of the locking groove (130) in the installation direction.

6. The backrest disassembly structure according to claim 1, characterized in that, The insertion end (120) is chamfered.

7. The backrest disassembly structure according to claim 1, characterized in that, The opening of the locking groove (130) and / or the front end (410) of the locking pin (4) are chamfered.

8. A chair, comprising a seat and a removable backrest, characterized in that, The backrest and the seat are connected by the backrest disassembly and assembly structure as described in any one of claims 1 to 7.

9. The seat according to claim 8, characterized in that, The shape of the mounting component (1) constitutes a structure that limits the relative angle between the backrest and the seat.

10. The seat according to claim 8, characterized in that, The locking groove (130) is disposed adjacent to the guide slope (121).

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