Backrest-adjustable vehicle repairing board

Abstract

The utility model relates to a backrest adjustable car repair lying plate and belongs to the technical field of automobile repair equipment, which comprises a base frame, a seat cushion arranged at the front end of the base frame, a backrest cushion arranged at the rear end of the base frame, a backrest cushion support for supporting the backrest cushion, and an angle adjuster assembly connected between the base frame and the backrest cushion support for unlocking the backrest cushion support relative to the base frame to enable the backrest cushion support to be adjusted in the inclination angle. The backrest cushion can be adjusted in the positive and negative angles at any position within the range of the backrest cushion stroke, and the operation is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of automotive repair equipment technology, specifically relating to a car repair reclining board with an adjustable backrest. Background Technology

[0002] With the continuous growth of car ownership, the demand for vehicle repair and maintenance is increasing. As an important repair tool, the comfort and functionality of a repair board directly affect the work efficiency of repair personnel. Currently, traditional repair boards on the market have limited functionality; their backrests are usually fixed or offer only a few fixed tilt angles, unable to be flexibly and infinitely adjusted according to the user's body shape and repair posture. Repair personnel are prone to fatigue and back strain during long hours of work, indicating a significant shortcoming in ergonomic design. To address these issues, existing technologies have attempted to add backrest adjustment functions to repair boards, but the adjustment mechanisms they employ often have obvious defects. For example, some directly borrow the hinge mechanism of beanbag chairs, but the adjustment process of this hinge mechanism is usually directionally limited, meaning that "the angle cannot be adjusted in the opposite direction before returning to its original position." This means that users cannot make fine, reciprocating angle adjustments at any position, resulting in poor operational convenience and failing to meet the actual needs of frequent and rapid posture adjustments during repair work. Therefore, the industry urgently needs a new type of repair board that can overcome the above-mentioned defects and has reliable, smooth, stepless angle adjustment capabilities to meet the demanding requirements of the repair environment.

[0003] In view of the aforementioned existing technology, the applicant has made beneficial designs, and the technical solutions to be introduced below are produced in this context. Utility Model Content

[0004] The purpose of this invention is to provide a car repair reclining board with an adjustable backrest that can be reliably and flexibly adjusted infinitely.

[0005] The purpose of this utility model is to provide a car repair reclining board with an adjustable backrest, comprising a base frame, a seat cushion disposed at the front end of the base frame, a backrest cushion disposed at the rear end of the base frame, and a backrest cushion bracket supporting the backrest cushion. An angle adjuster assembly is connected between the base frame and the backrest cushion bracket to unlock the backrest cushion bracket relative to the base frame so that the backrest cushion bracket can be tilted at an adjustable angle.

[0006] In a specific embodiment of this utility model, the angle adjuster assembly includes a first base frame connecting plate, a first cushion bracket connecting plate, a locking plate, an unlocking plate, and an operating handle. The first base frame connecting plate is fixedly connected to the base frame. The upper end of the first cushion bracket connecting plate is fixedly connected to the cushion bracket, and the lower end is hinged to the first base frame connecting plate. The operating handle is throttle-connected to the unlocking plate. The locking plate is disposed between the unlocking plate and the first cushion bracket connecting plate. The unlocking plate moves synchronously with the operating handle, and the locking plate is driven by the unlocking plate to unlock or lock the first cushion bracket connecting plate.

[0007] In another specific embodiment of this utility model, the angle adjuster assembly further includes a return spring, which controls the cushion to automatically rebound upward when the locking plate and the first cushion bracket connecting plate are in the unlocked state.

[0008] In another specific embodiment of this utility model, the first cushion support connecting plate has a fan-shaped tooth at its lower end, and one end of the locking plate has an arc-shaped tooth segment that engages with the fan-shaped tooth to unlock the first cushion support connecting plate, thereby enabling stepless adjustment of the positive and negative angles of the cushion, or to lock the first cushion support connecting plate, thereby enabling multi-position locking of the cushion position. The fan-shaped tooth and the arc-shaped tooth segment cooperate to allow the first cushion support connecting plate to rotate between 90° vertically and 180° horizontally. The other end of the locking plate has a locking groove, and the unlocking plate has a locking tongue that engages with the locking groove at its end facing the locking plate. The locking plate unlocks or locks the first cushion support connecting plate by applying force in both directions through the locking tongue.

[0009] In another specific embodiment of this utility model, the angle adjuster assembly further includes a locking plate baffle. The locking plate baffle and the unlocking plate are connected by gear meshing. The locking plate baffle has a pressure foot facing the locking plate. When the locking plate locks the first cushion bracket connecting plate, the pressure foot abuts against the upper surface of the locking plate.

[0010] In another specific embodiment of this utility model, the angle adjuster assembly further includes a shaft end fastening plate, which is arranged parallel to and spaced apart from the first base frame connecting plate. The locking plate, unlocking plate, and locking plate baffle are disposed between the shaft end fastening plate and the first base frame connecting plate. The first cushion bracket connecting plate, locking plate, and locking plate baffle are respectively hinged to the first base frame connecting plate via the hinge shaft of the first cushion bracket connecting plate, the hinge shaft of the locking plate, and the hinge shaft of the locking plate baffle. The unlocking plate and the operating handle are connected to the first base frame connecting plate via the unlocking plate hinge shaft. The hinges are as follows: the ends of the hinge shafts of the first cushion bracket connecting plate, the locking plate, the unlocking plate, and the locking plate baffle are threaded through and fastened to the shaft end fastening plate; the operating handle has an unlocking plate positioning pin protruding on the side facing the unlocking plate; the unlocking plate has a positioning pin hole corresponding to the unlocking plate positioning pin; the first cushion bracket connecting plate has a first fixed shaft on the side facing away from the cushion bracket; the inner end of the return spring is fixed to the hinge shaft of the first cushion bracket connecting plate, and the outer end of the return spring is connected to the first fixed shaft.

[0011] In a further specific embodiment of this utility model, the angle adjuster assembly further includes a return spring, which is disposed on the outside of the shaft end fastening plate. The lower end of the return spring is connected to the lower edge of the shaft end fastening plate, and the upper end of the return spring is connected to the spring hole on the operating handle.

[0012] In a further specific embodiment of this utility model, the first base frame connecting plate forms a limiting plate on the upper part facing the operating handle. When the first base frame connecting plate is rotated to a 90° position, the upper end surface of the first base frame connecting plate abuts against the limiting plate to limit the cushion in a vertical position.

[0013] In another specific embodiment of this utility model, an adjusting device accessory is also included. The adjusting device accessory and the adjusting device assembly are symmetrically arranged about the left and right sides of the cushion. The adjusting device accessory includes a second base frame connecting plate and a second cushion support connecting plate. The second base frame connecting plate is fixedly connected to the base frame. The upper end of the second cushion support connecting plate is fixedly connected to the cushion support, and the lower end is hinged to the second base frame connecting plate through a hinge shaft. A second fixed shaft is provided on the second base frame connecting plate and below the hinge shaft. The inner end of the return spring is fixed to the hinge shaft of the second cushion support connecting plate, and the outer end of the return spring is connected to the second fixed shaft.

[0014] In yet another specific embodiment of this utility model, the base frame includes a pair of parallel and longitudinally extending side longitudinal beams, a pair of side transverse beams respectively disposed at the front and rear ends of the pair of side longitudinal beams, an intermediate transverse beam connected at the middle position between the pair of side longitudinal beams, and a pair of intermediate longitudinal beams with one end connected to the intermediate transverse beam and the other end connected to the front side transverse beam of the pair of side transverse beams; the bottom of the cushion is fixedly installed with the pair of intermediate longitudinal beams, and the first base frame connecting plate and the second base frame connecting plate are respectively fixed to the corresponding intermediate longitudinal beams of the pair of intermediate longitudinal beams; the bottom of the pair of side longitudinal beams is provided with casters; the backrest support includes a mounting plate, the two ends of the mounting plate in the length direction are bent and wrapped around the left and right sides of the backrest, for the first backrest support connecting plate and the second backrest support connecting plate to be connected and fixed.

[0015] Due to the adoption of the above-mentioned structure, this utility model has the following advantages compared with the prior art: it enables the backrest to be adjusted in multiple positions between a 90° vertical position and a 180° reclining position, making operation extremely convenient. Maintenance personnel can adjust the back support in real time according to different work needs, achieving free adaptation of the backrest angle; the transmission structure is stable and reliable, and can fully adapt to various stress conditions in the maintenance environment, ensuring the durability and safety of the product. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 for Figure 1 Enlarged view of part A in the image; Figure 3 This is an exploded view of the angle adjuster assembly described in another embodiment of the present invention.

[0017] In the diagram: 1. Base frame, 11. Side longitudinal beam, 111. Casters, 12. Side crossbeam, 13. Middle crossbeam, 14. Middle longitudinal beam; 2. Seat cushion; 3. Backrest cushion, 31. Headrest; 4. Backrest cushion bracket, 41. Mounting plate; 5. Angle adjuster assembly, 50. Return spring, 51. First base frame connecting plate, 511. First backrest cushion bracket connecting plate hinge shaft, 512. Locking plate hinge shaft, 513. Unlocking plate hinge shaft, 514. Locking plate baffle hinge shaft, 515. Limiting plate, 52. First backrest cushion bracket connecting plate, 52 1. Sector-shaped teeth; 522. First fixed shaft; 53. Locking plate; 531. Arc-shaped tooth segment; 532. Locking groove; 54. Unlocking plate; 541. Lock tongue; 542. Positioning pin hole; 55. Operating handle; 551. Unlocking plate positioning pin; 552. Spring hole; 56. Locking plate baffle; 561. Presser foot; 57. Shaft end fastening plate; 58. Return spring; 6. Angle adjuster accessory; 61. Second base frame connecting plate; 611. Second fixed shaft; 62. Second cushion bracket connecting plate; 63. Second cushion bracket connecting plate hinge shaft. Detailed Implementation

[0018] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.

[0019] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back refer to the position of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be construed as a special limitation on the technical solution provided by this utility model.

[0020] Example 1: Please refer to Figure 1This utility model relates to an adjustable-backrest car repair recliner, comprising a base frame 1, a seat cushion 2 fixedly mounted at the front end of the base frame 1, a backrest cushion 3 movably mounted at the rear end of the base frame 1, and a backrest cushion bracket 4 supporting the backrest cushion 3. The base frame 1 includes a pair of parallel and longitudinally extending side longitudinal beams 11, a pair of side crossbeams 12 respectively located at the front and rear ends of the pair of side longitudinal beams 11, a central crossbeam 13 connected at the middle position between the pair of side longitudinal beams 11, and a pair of central longitudinal beams 14 connected at one end to the central crossbeam 13 and at the other end to the front side crossbeam 12 of the pair of side crossbeams 12. The bottom of the seat cushion 2 is fixedly installed to the pair of central longitudinal beams 14, and the bottom of the pair of side longitudinal beams 11 is provided with casters 111. The backrest cushion 3 has a headrest 31 formed at the end away from the seat cushion 2. The cushion support 4 includes a mounting plate 41, the two ends of which are bent and wrapped around the left and right sides of the cushion 3. An adjuster assembly 5 and an adjuster accessory 6 are connected between the base frame 1 and the cushion support 4. The adjuster accessory 6 and the adjuster assembly 5 are symmetrically arranged about the left and right sides of the cushion 3. The adjuster assembly 5 is used to unlock the cushion support 4 relative to the base frame 1, allowing for stepless adjustment of the cushion support 4's tilt angle.

[0021] See Figure 2 The adjustable angle assembly 5 includes a first base frame connecting plate 51, a first cushion bracket connecting plate 52, a locking plate 53, an unlocking plate 54, and an operating handle 55. The first base frame connecting plate 51 is fixed to one of the two intermediate longitudinal beams 14 on the left side of the base frame 1. The upper end of the first cushion bracket connecting plate 52 is fixedly connected to the mounting plate 41 on the left side of the cushion bracket 4, and the lower end is hinged to the first base frame connecting plate 51. The operating handle 55 is drively connected to the unlocking plate 54, and the locking plate 53 is located between the unlocking plate 54 and the first cushion bracket connecting plate 52. The unlocking plate 54 moves synchronously with the operating handle 55, and the locking plate 53 is driven by the unlocking plate 54 to unlock or lock the first cushion bracket connecting plate 52. When it is necessary to lower the tilt angle of the cushion 3, the operating handle 55 is moved, and the cushion bracket 4 returns to its original position by gravity or load. Releasing the operating handle 55 automatically locks the cushion bracket 4.

[0022] Specifically, the first cushion support connecting plate 52 has a fan-shaped tooth 521 at its lower end, and one end of the locking plate 53 has an arc-shaped tooth segment 531 that engages with the fan-shaped tooth 521 to unlock the first cushion support connecting plate 52, allowing for stepless adjustment of the positive and negative angles of the cushion 3, or to lock the first cushion support connecting plate 52, allowing for multi-position locking of the cushion 3. In this embodiment, the fan angle (i.e., the total unfolding angle) of the fan-shaped tooth 521 is 180 degrees. Through the cooperation of the fan-shaped tooth 521 and the arc-shaped tooth segment 531, the first cushion support connecting plate 52 can rotate between 90° vertically and 180° horizontally, thus realizing the adjustment of the tilt angle of the cushion 3 between a 90° vertical state and a 180° flat state. The size of the apex angle of each tooth on the fan-shaped tooth 521 determines the angle of change for each position. In this embodiment, 5 degrees corresponds to one position. The other end of the locking plate 53 has a latch groove 532. The unlocking plate 54 has a latch tongue 541 that cooperates with the latch groove 532 at the end facing the locking plate 53. When the latch tongue 541 applies force to the latch groove 532 in the forward direction (i.e., clockwise downward), the locking plate 53 unlocks the first cushion bracket connecting plate 52. When the latch tongue 541 applies force to the latch groove 532 in the reverse direction (i.e., counterclockwise), the locking plate 53 locks the first cushion bracket connecting plate 52.

[0023] Furthermore, the angle adjuster assembly 5 also includes a locking plate baffle 56, which is connected to the unlocking plate 54 via gear meshing. The locking plate baffle 56 has a pressure foot 561 facing the locking plate 53. When the locking plate 53 is locked to the first cushion bracket connecting plate 52, the pressure foot 561 abuts against the upper surface of the locking plate 53. When the operating handle 55 is pulled upwards clockwise, the locking plate baffle 56 is driven by the unlocking plate 54 to rotate counterclockwise, and the pressure foot 561 separates from the locking plate 53.

[0024] Furthermore, the angle adjuster assembly 5 also includes a shaft end fastening plate 57, which is arranged parallel to and spaced apart from the first base frame connecting plate 51. The locking plate 53, unlocking plate 54, and locking plate baffle 56 are disposed between the shaft end fastening plate 57 and the first base frame connecting plate 51. The first cushion bracket connecting plate 52, locking plate 53, and locking plate baffle 56 are respectively hinged to the first base frame connecting plate 51 via the first cushion bracket connecting plate hinge shaft 511, the locking plate hinge shaft 512, and the locking plate baffle hinge shaft 514. The unlocking plate 54 and the operating handle 55 are jointly hinged to the first base frame connecting plate 51 via the unlocking plate hinge shaft 513. The ends of the first cushion bracket connecting plate hinge shaft 511, the locking plate hinge shaft 512, the unlocking plate hinge shaft 513, and the locking plate baffle hinge shaft 514 pass through the shaft end fastening plate 57 and are fastened. The operating handle 55 has an unlocking plate positioning pin 551 protruding on the side facing the unlocking plate 54. The unlocking plate 54 has a positioning pin hole 542 corresponding to the unlocking plate positioning pin 551. The unlocking plate positioning pin 551 and the positioning pin hole 542 cooperate to enable the unlocking plate 54 to move synchronously with the operating handle 55.

[0025] The angle adjuster assembly 5 also includes a return spring 50. When it is necessary to raise the tilt angle of the cushion 3, the operating handle 55 is moved to unlock the locking plate 53 and the first cushion bracket connecting plate 52. At this time, the return spring 50 can make the cushion bracket 4 automatically spring back upward. When the operating handle 55 is released, the cushion bracket 4 automatically locks.

[0026] Furthermore, the angle adjuster assembly 5 also includes a return spring 58, which is disposed on the outside of the shaft end fastening plate 57. The lower end of the return spring 58 is connected to the lower edge of the shaft end fastening plate 57, and the upper end of the return spring 58 is connected to the spring hole 552 on the operating handle 55. The return spring 58 is used for automatic reset after the operating handle 55 is lifted to unlock.

[0027] Furthermore, the first base frame connecting plate 51 has a limiting plate 515 formed on the upper part facing the operating handle 55. In this embodiment, when the first base frame connecting plate 51 is rotated to a 90° position, the upper end surface of the first base frame connecting plate 51 abuts against the limiting plate 515 to limit the cushion 3 in the vertical position.

[0028] Furthermore, the angle adjuster accessory 6 includes a second base frame connecting plate 61 and a second cushion bracket connecting plate 6. The second base frame connecting plate 61 is fixed to one of the two intermediate longitudinal beams 14 on the right side of the base frame 1. The upper end of the second cushion bracket connecting plate 62 is fixedly connected to the mounting plate 41 on the right end of the cushion bracket 4, and the lower end is hinged to the second base frame connecting plate 61 through a second cushion bracket connecting plate hinge shaft 63. In this embodiment, a second fixing shaft 611 is provided on the second base frame connecting plate 61 of the angle adjuster accessory 6 and below the second cushion bracket connecting plate hinge shaft 63. The inner end of the return spring 50 is fixed to the second cushion bracket connecting plate hinge shaft 63, and the outer end of the return spring 50 is connected to the second fixing shaft 611.

[0029] When the operating handle 55 is rotated clockwise and lifted, the unlocking plate 54 rotates clockwise and drives the locking plate baffle 56 to rotate counterclockwise, causing the pressure foot 561 to separate from the locking plate 53. The locking tongue 541 then presses down on the locking plate 53. The locking plate 53 rotates counterclockwise to unlock the first cushion bracket connecting plate 52. At this time, the cushion 3 is in the unlocked state and can be adjusted positively or negatively according to maintenance needs. When the operating handle 55 is released, it rotates counterclockwise under the action of the return spring 58. The locking tongue 541 applies force in the opposite direction to the locking plate 53, causing it to rotate clockwise and engage with the first cushion bracket connecting plate 52 to lock it. During the above process, the unlocking plate 54 rotates counterclockwise and drives the pressure foot 561 of the locking plate baffle 56 to rotate towards the locking plate 53. When the pressure foot 561 presses against the locking plate 53, it locks the unlocking plate 54 and the operating handle 55.

[0030] Example 2: See Figure 3 In this embodiment, the first cushion bracket connecting plate 52 is provided with a first fixed shaft 522 on the side facing away from the cushion bracket 4. The inner end of the return spring 50 is fixed to the hinge shaft 511 of the first cushion bracket connecting plate, and the outer end of the return spring 50 is connected to the first fixed shaft 522. The rest is the same as in embodiment 1.

[0031] This invention features a stable and reliable overall structure, capable of adapting to various stress conditions in maintenance environments, ensuring product durability and safety. Users can easily lock or release the backrest 3 angle by simply cranking the operating handle 55 to engage and disengage the internal gears. Simultaneously, the return spring 50 ensures that the backrest 3 automatically springs back to its initial position upon unlocking, greatly facilitating post-use reset and quick adjustments between different users. This invention achieves free adaptation of the backrest 3 angle, allowing maintenance personnel to adjust the back support in real time according to different work needs, thereby improving work efficiency and ensuring work comfort, thus achieving the invention's objective.

Claims

1. A car repair reclining chair with adjustable backrest, comprising a base frame (1), a seat cushion (2) disposed at the front end of the base frame (1), a backrest cushion (3) disposed at the rear end of the base frame (1), and a backrest cushion bracket (4) supporting the backrest cushion (3), characterized in that: An angle adjuster assembly (5) is connected between the base frame (1) and the cushion support (4) for unlocking the cushion support (4) relative to the base frame (1) to allow the cushion support (4) to be tilted. The angle adjuster assembly (5) includes a first base frame connecting plate (51), a first cushion support connecting plate (52), a locking plate (53), an unlocking plate (54), and an operating handle (55). The first base frame connecting plate (51) is fixedly connected to the base frame (1). The upper end of the cushion bracket connecting plate (52) is fixedly connected to the cushion bracket (4), and the lower end is hinged to the first base frame connecting plate (51). The operating handle (55) is connected to the unlocking plate (54) in a transmission manner. The locking plate (53) is set between the unlocking plate (54) and the first cushion bracket connecting plate (52). The unlocking plate (54) moves synchronously with the operating handle (55), and the locking plate (53) is driven by the unlocking plate (54) to unlock or lock the first cushion bracket connecting plate (52).

2. The adjustable backrest car repair reclining board according to claim 1, characterized in that: The angle adjuster assembly (5) also includes a return spring (50), which controls the cushion (3) to automatically rebound upward when the locking plate (53) and the first cushion bracket connecting plate (52) are in the unlocked state.

3. The adjustable backrest car repair reclining board according to claim 2, characterized in that: The first cushion support connecting plate (52) has a fan-shaped tooth (521) at its lower end. One end of the locking plate (53) has an arc-shaped tooth segment (531) that engages with the fan-shaped tooth (521) to unlock the first cushion support connecting plate (52) and allow for stepless adjustment of the positive and negative angles of the cushion (3), or to lock the first cushion support connecting plate (52) and allow for multi-position locking of the cushion (3). The fan-shaped tooth (521) and The arc-shaped toothed segment (531) engages, allowing the first cushion bracket connecting plate (52) to rotate between 90° vertically and 180° horizontally. The other end of the locking plate (53) forms a locking groove (532). The unlocking plate (54) has a locking tongue (541) at one end facing the locking plate (53) that engages with the locking groove (532). By applying force in both directions through the locking tongue (541), the locking plate (53) can be unlocked or locked against the first cushion bracket connecting plate (52).

4. The adjustable backrest car repair reclining board according to claim 2, characterized in that: The angle adjuster assembly (5) further includes a locking plate baffle (56), which is connected to the unlocking plate (54) by gear meshing. The locking plate baffle (56) has a pressure foot (561) facing the locking plate (53). When the locking plate (53) locks the first cushion bracket connecting plate (52), the pressure foot (561) abuts against the upper surface of the locking plate (53).

5. The adjustable backrest car repair reclining board according to claim 4, characterized in that: The angle adjuster assembly (5) further includes a shaft end fastening plate (57), which is parallel to and spaced apart from the first base frame connecting plate (51). The locking plate (53), unlocking plate (54), and locking plate baffle (56) are disposed between the shaft end fastening plate (57) and the first base frame connecting plate (51). The first cushion support connecting plate (52), locking plate (53), and locking plate baffle (56) are respectively hinged to the first base frame connecting plate (51) through the first cushion support connecting plate hinge shaft (511), the locking plate hinge shaft (512), and the locking plate baffle hinge shaft (514). The unlocking plate (54) and the operating handle (55) are hinged to the first base frame connecting plate (51) through the unlocking plate hinge shaft (513). The ends of the frame connecting plate hinge shaft (511), the locking plate hinge shaft (512), the unlocking plate hinge shaft (513), and the locking plate baffle hinge shaft (514) are threaded onto the shaft end fastening plate (57) and fastened. The operating handle (55) has an unlocking plate positioning pin (551) protruding on the side facing the unlocking plate (54). The unlocking plate (54) has a positioning pin hole (542) corresponding to the unlocking plate positioning pin (551). The first cushion bracket connecting plate (52) has a first fixed shaft (522) on the side facing away from the cushion bracket (4). The inner end of the return spring (50) is fixed on the first cushion bracket connecting plate hinge shaft (511), and the outer end of the return spring (50) is connected to the first fixed shaft (522).

6. The adjustable backrest car repair reclining board according to claim 5, characterized in that: The angle adjuster assembly (5) further includes a return spring (58), which is disposed on the outside of the shaft end fastening plate (57). The lower end of the return spring (58) is connected to the lower edge of the shaft end fastening plate (57), and the upper end of the return spring (58) is connected to the spring hole (552) on the operating handle (55).

7. A car repair reclining board with an adjustable backrest according to claim 3, characterized in that: The first base frame connecting plate (51) forms a limiting plate (515) on the upper part facing the operating handle (55). When the first base frame connecting plate (51) is rotated to the 90° position, the upper end surface of the first base frame connecting plate (51) abuts against the limiting plate (515) to limit the cushion (3) in the vertical position.

8. A car repair reclining board with an adjustable backrest according to claim 2, characterized in that: It also includes an adjuster accessory (6), which is symmetrically arranged with respect to the cushion (3) with respect to the adjuster assembly (5). The adjuster accessory (6) includes a second base frame connecting plate (61) and a second cushion bracket connecting plate (62). The second base frame connecting plate (61) is fixedly connected to the base frame (1). The upper end of the second cushion bracket connecting plate (62) is fixedly connected to the cushion bracket (4), and the lower end is hinged to the second base frame connecting plate (61) through the second cushion bracket connecting plate hinge shaft (63). A second fixed shaft (611) is provided on the second base frame connecting plate (61) and below the second cushion bracket connecting plate hinge shaft (63). The inner end of the return spring (50) is fixed on the second cushion bracket connecting plate hinge shaft (63), and the outer end of the return spring (50) is connected to the second fixed shaft (611).

9. A car repair reclining board with an adjustable backrest according to claim 8, characterized in that: The base frame (1) includes a pair of parallel and longitudinally extending side beams (11), a pair of side crossbeams (12) respectively disposed at the front and rear ends of the pair of side beams (11), a middle crossbeam (13) connected in the middle between the pair of side beams (11), and a pair of middle beams (14) with one end connected to the middle crossbeam (13) and the other end connected to the side crossbeam (12) located on the front side of the pair of side crossbeams (12); the bottom of the cushion (2) is fixedly mounted to the pair of middle beams (14). The first base frame connecting plate (51) and the second base frame connecting plate (61) are respectively fixed to the corresponding intermediate longitudinal beams (14) of a pair of intermediate longitudinal beams (14); the bottom of the pair of side longitudinal beams (11) is provided with casters (111); the cushion bracket (4) includes a mounting plate (41), the two ends of the mounting plate (41) in the length direction are bent and wrapped around the left and right sides of the cushion (3) for the first cushion bracket connecting plate (52) and the second cushion bracket connecting plate (62) to connect and fix.

Images