Seat support with fine adjustment

Abstract

The utility model discloses a seat support with fine adjustment, one end of hinge joint of backrest support with side plate support is equipped with the joint fixed structure, be equipped with the drive arrangement of connection control the joint fixed structure on the support main part, still be equipped with the reset mechanism of control joint fixed structure reset on the backrest support, the joint fixed structure in the scheme realizes the fixation to backrest support angle through the fixed mode of joint convex point and joint recess, realizes the accurate adjustment to backrest support angle, wherein the drive arrangement control third connecting rod swing second connecting rod with lever drive mode makes joint convex point separate from joint recess, can realize the angle adjustment of backrest support, and reset spring is hauled second connecting rod reset after completing the adjustment of angle and realizes the fixation to backrest support, and the angle adjustment process of backrest support is stable and smooth.

Description

Technical Field

[0001] This utility model relates to the field of seat bracket technology, and specifically to a seat bracket with fine adjustment. Background Technology

[0002] With social development and technological advancements, more and more office workers are choosing office chairs with adjustable backrests. These chairs allow users to adjust their posture and height during work. The design of the chair is crucial, directly impacting the user's work efficiency and well-being. The seat base, also known as the seat tray, is an important component located under the seat cushion. Modern chairs with adjustable backrests allow for reclining and height adjustments, providing users with a relaxing resting experience. Therefore, office chairs with adjustable backrests are popular among most office workers. Existing seat chassis adjustment methods include controlling seat height through a gas spring control structure and adjusting the angle between the seat and backrest through an angle adjustment positioning device. Both seat height and backrest angle are adjusted through separate gas spring structures. While gas spring adjustment can quickly achieve height and angle adjustment, it is not convenient for adjusting the angle for comfort and cannot achieve precise angle adjustment to achieve the user's comfort level. Utility Model Content

[0003] To address the technical deficiencies in the prior art, this utility model proposes a seat bracket with fine adjustment, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows: A finely adjustable seat bracket includes a bracket body and a side plate bracket mounted on the bracket body. The side plate bracket is connected to a base bracket and a backrest bracket. The end of the backrest bracket that is hinged to the side plate bracket is provided with a snap-fit ​​fixing structure. The bracket body is provided with a drive device that connects to and controls the snap-fit ​​fixing structure. The backrest bracket is also provided with a reset mechanism that controls the reset of the snap-fit ​​fixing structure. The end of the backrest bracket that is hinged to the side plate bracket is also provided with an extension bracket that is hinged to the base bracket. The base bracket is provided with a first connecting rod that is hinged to the side plate bracket.

[0004] As an improvement to the above solution, the main body of the support is provided with upwardly upright handrail supports on both sides, the side plate support is fixed on the handrail supports, the outer end face of the handrail supports is provided with the reset mechanism, and the inner end face of the handrail supports is provided with the snap-fit ​​fixing structure.

[0005] As an improvement to the above solution, the snap-fit ​​fixing structure includes a second connecting rod disposed on the inner end face of the armrest bracket, snap-fit ​​protrusions disposed on the side of the second connecting rod, and a plurality of snap-fit ​​grooves disposed on the end of the backrest bracket that is hinged to the side plate bracket, wherein the shape of the snap-fit ​​protrusions and the snap-fit ​​grooves are adapted to each other.

[0006] As an improvement to the above solution, the end of the backrest bracket that is hinged to the side plate bracket is provided with a fan-shaped connecting surface. The connecting surface is provided with a number of equally spaced snap-fit ​​grooves, thereby forming a toothed surface. In the snap-fit ​​state, the side of the second connecting rod is provided with at least one snap-fit ​​protrusion that is adapted to snap-fit ​​with the toothed surface.

[0007] As an improvement to the above solution, one end of the second connecting rod is hinged to the side plate bracket, and the other end passes through the side plate bracket and is connected to the reset mechanism on the outside of the side plate bracket. The side plate bracket is provided with an arc-shaped groove at the end position corresponding to the second connecting rod.

[0008] As an improvement to the above solution, the reset mechanism includes a reset spring and a fixed anchor point. The fixed anchor point is located at one end of the side plate bracket near the backrest bracket. One end of the reset spring is connected to the fixed anchor point, and the other end is connected to the end of the second connecting rod.

[0009] As an improvement to the above solution, the outer end face of the side plate bracket is provided with a third connecting rod that is connected to the output end of the drive device. The middle part of the third connecting rod is hinged to the side plate bracket. The drive device is connected to one end of the third connecting rod, and the other end of the third connecting rod abuts and fits against the end of the second connecting rod.

[0010] The beneficial effects of this utility model are as follows: The snap-fit ​​fixing structure in this solution achieves the fixing of the backrest bracket angle through the snap-fit ​​protrusion and snap-fit ​​groove, thereby achieving precise adjustment of the backrest bracket angle. The driving device controls the third connecting rod to swing the second connecting rod in a lever-driven manner, so that the snap-fit ​​protrusion disengages from the snap-fit ​​groove, thereby achieving the angle adjustment of the backrest bracket. After the angle adjustment is completed, the return spring pulls the second connecting rod to return to its original position, thereby fixing the backrest bracket. The angle adjustment process of the backrest bracket is smooth and stable. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the inner end face structure of the support body of this utility model.

[0012] Figure 2 This is a schematic diagram of the outer end face structure of the support body of this utility model.

[0013] Figure 3 This is a schematic diagram of the snap-fit ​​fixing structure of this utility model.

[0014] The components include: main support body 1, handrail support 11, side plate support 2, arc groove 21, third connecting rod 22, base support 3, first connecting rod 31, backrest support 4, connecting surface 41, extension support 42, snap-fit ​​fixing structure 5, second connecting rod 51, snap-fit ​​protrusion 52, snap-fit ​​groove 53, driving device 6, reset mechanism 7, reset spring 71, and fixed anchor point 72. Detailed Implementation

[0015] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0016] like Figures 1 to 3 As shown, a seat bracket with fine adjustment includes a bracket body 1 and a side plate bracket 2 disposed on the bracket body 1. The side plate bracket 2 is connected to a base bracket 3 and a backrest bracket 4. The backrest bracket 4 is provided with a snap-fit ​​fixing structure 5 at one end that is hinged to the side plate bracket 2. The bracket body 1 is provided with a drive device 6 that connects to and controls the snap-fit ​​fixing structure 5. The backrest bracket 4 is also provided with a reset mechanism 7 that controls the reset of the snap-fit ​​fixing structure 5. The backrest bracket 4 is also provided with an extension bracket 42 that is hinged to the base bracket 3 at one end that is hinged to the side plate bracket 2. The base bracket 3 is provided with a first connecting rod 31 that is hinged to the side plate bracket 2.

[0017] In the technical solution of the seat bracket of this utility model, the two sides of the bracket body 1 are provided with side plate brackets 2, base brackets 3 and backrest brackets 4. The output end of the drive device 6 is two, which extend to the snap-fit ​​fixing structure 5 on both sides of the bracket body 1 respectively. The backrest brackets 4 and base brackets 3 on both sides of the bracket body 1 can be adjusted and swung synchronously. The drive device 6 is a wired control device. In the technical solution of the support body 1 of this utility model, the support body 1 is provided with upwardly upright handrail supports 11 on both sides, the side plate support 2 is fixed on the handrail supports 11, the outer end face of the handrail supports 11 is provided with the reset mechanism 7, and the inner end face of the handrail supports 11 is provided with the snap-fit ​​fixing structure 5. It should be noted that in this scheme, the snap-fit ​​fixing structure 5 is used to fix the backrest bracket 4, and the seat bracket is connected to the backrest bracket 4. While fixing the backrest bracket 4, the seat bracket is simultaneously fixed. When the snap-fit ​​fixing structure 5 is released, the angle of the backrest bracket 4 can be adjusted, which can drive the adjustment of the seat bracket's height. The opening of the snap-fit ​​fixing structure 5 is controlled by the drive device 6, and the closing of the snap-fit ​​fixing structure 5 is controlled by the drive device 6 and the reset mechanism 7. Furthermore, in the above scheme, the adjustment of the backrest bracket 4 is limited by an angle. The end face of the backrest bracket 4 is provided with a limiting groove around the hinge point with the side plate bracket 2. A limiting block is installed and fixed on the side plate bracket 2 through the limiting groove, so that the limiting block limits the rotation limit angle of the backrest bracket 4 during the rotation process. Therefore, the length of the limiting groove determines the maximum and minimum rotation angle of the backrest bracket 4.

[0018] In the technical solution of the snap-fit ​​fixing structure 5 of this utility model, the snap-fit ​​fixing structure 5 includes a second connecting rod 51 disposed on the inner end face of the armrest bracket 11, snap-fit ​​protrusions 52 disposed on the side of the second connecting rod 51, and a plurality of snap-fit ​​grooves 53 disposed on the end of the backrest bracket 4 that is hinged to the side plate bracket 2, wherein the shape of the snap-fit ​​protrusions 52 and the snap-fit ​​grooves 53 are adapted to each other. It should be noted that in this technical solution, one end of the second connecting rod 51 is hinged to the side plate bracket 2, and the other end is connected to the reset mechanism 7. Under the drive of the driving device 6, the second connecting rod 51 swings away from the reset mechanism 7, thereby causing the locking protrusion 52 to disengage from the locking groove 53. After the backrest bracket 4 is freed from the restriction of the locking protrusion 52, it can achieve angle adjustment. While adjusting the angle of the backrest bracket 4, the backrest bracket 4 drives the base bracket 3 to adjust synchronously through the extension bracket 42, so that the base bracket 3 rises or falls synchronously.

[0019] Furthermore, in the above scheme, the outer end face of the side plate bracket 2 is provided with a third connecting rod 22 that is connected to the output end of the driving device 6. The middle part of the third connecting rod 22 is hinged to the side plate bracket 2. The driving device 6 is connected to one end of the third connecting rod 22, and the other end of the third connecting rod 22 is in contact with and fits against the end of the second connecting rod 51.

[0020] Furthermore, in the above scheme, one end of the second connecting rod 51 is hinged to the side plate bracket 2, and the other end is bent through the side plate bracket 2 and connected to the reset mechanism 7 on the outside of the side plate bracket 2. The side plate bracket 2 is provided with an arc-shaped groove 21 corresponding to the end position of the second connecting rod 51. When the driving device 6 drives the third connecting rod 22 to swing the second connecting rod 51, the bent end of the second connecting rod 51 swings along the arc-shaped groove 21. After the driving device 6 releases the traction on the third connecting rod 22, the reset mechanism 7 retracts and resets to control the second connecting rod 51 to reset along the arc-shaped groove 21.

[0021] In the technical solution of the reset mechanism 7, the reset mechanism 7 includes a reset spring 71 and a fixed anchor point 72. The fixed anchor point 72 is located at one end of the side panel bracket 2 near the backrest bracket 4. One end of the reset spring 71 is connected to the fixed anchor point 72, and the other end is connected to the end of the second connecting rod 51. When the driving device 6 and the third connecting rod 22 are not involved, the reset spring 71 pulls the second connecting rod 51 toward the backrest bracket 4 by its own elasticity and keeps the snap-fit ​​protrusion 52 and the snap-fit ​​groove 53 in a snap-fit ​​fixed state.

[0022] Furthermore, in the above scheme, the end of the backrest bracket 4 that is hinged to the side plate bracket 2 is provided with a fan-shaped connecting surface 41. The connecting surface 41 is provided with a plurality of equally spaced snap-fit ​​grooves 53, thereby forming a toothed surface. In the snap-fit ​​state, the second connecting rod 51 is provided with at least one snap-fit ​​protrusion 52 on its side that is adapted to snap-fit ​​with the toothed surface. When the driving device 6 drives the third connecting rod 22 to intervene, the driving device 6 pulls one end of the third connecting rod 22, so that the other end of the third connecting rod 22 abuts against the end of the second connecting rod 51 in a lever transmission manner, pushing the second connecting rod 51 to control the snap-fit ​​protrusion 52 to disengage from the snap-fit ​​groove 53, so that the backrest bracket 4 is in an adjustable rotation state.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A seat bracket with fine adjustment, characterized in that, The bracket includes a main body (1) and a side plate bracket (2) mounted on the main body (1). The side plate bracket (2) is connected to a base bracket (3) and a backrest bracket (4). The backrest bracket (4) is hinged to the side plate bracket (2) and has a snap-fit ​​fixing structure (5). The main body (1) is equipped with a drive device (6) that controls the snap-fit ​​fixing structure (5). The backrest bracket (4) is also equipped with a reset mechanism (7) that controls the reset of the snap-fit ​​fixing structure (5). The backrest bracket (4) is hinged to the side plate bracket (2) and has an extension bracket (42) that is hinged to the base bracket (3). The base bracket (3) is equipped with a first connecting rod (31) that is hinged to the side plate bracket (2).

2. The seat bracket with fine adjustment according to claim 1, characterized in that, The main body of the support (1) has upward-standing handrail supports (11) on both sides. The side plate support (2) is fixed on the handrail support (11). The outer end face of the handrail support (11) is provided with the reset mechanism (7). The inner end face of the handrail support (11) is provided with the snap-fit ​​fixing structure (5).

3. The seat bracket with fine adjustment according to claim 2, characterized in that, The snap-fit ​​fixing structure (5) includes a second connecting rod (51) disposed on the inner end face of the armrest bracket (11), a snap-fit ​​protrusion (52) disposed on the side of the second connecting rod (51), and a plurality of snap-fit ​​grooves (53) disposed on one end of the backrest bracket (4) that is hinged to the side plate bracket (2). The shape of the snap-fit ​​protrusion (52) and the snap-fit ​​groove (53) are adapted to each other.

4. The seat bracket with fine adjustment according to claim 3, characterized in that, The backrest bracket (4) and the side plate bracket (2) are hinged at one end and have a fan-shaped connecting surface (41). The connecting surface (41) has several equally spaced snap-fit ​​grooves (53) to form a toothed surface. In the snap-fit ​​state, the second connecting rod (51) has at least one snap-fit ​​protrusion (52) on its side that is adapted to snap-fit ​​the toothed surface.

5. The seat bracket with fine adjustment according to claim 3, characterized in that, One end of the second connecting rod (51) is hinged to the side plate bracket (2), and the other end passes through the side plate bracket (2) and is connected to the reset mechanism (7) on the outside of the side plate bracket (2). The side plate bracket (2) is provided with an arc groove (21) at the end position corresponding to the second connecting rod (51).

6. The seat bracket with fine adjustment according to claim 3, characterized in that, The reset mechanism (7) includes a reset spring (71) and a fixed anchor point (72). The fixed anchor point (72) is located at one end of the side plate bracket (2) near the backrest bracket (4). One end of the reset spring (71) is connected to the fixed anchor point (72), and the other end is connected to the end of the second connecting rod (51).

7. The seat bracket with fine adjustment according to claim 3, characterized in that, The outer end face of the side plate bracket (2) is provided with a third connecting rod (22) connected to the output end of the drive device (6). The middle part of the third connecting rod (22) is hinged to the side plate bracket (2). The drive device (6) is connected to one end of the third connecting rod (22). The other end of the third connecting rod (22) abuts against the end of the second connecting rod (51).

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