Sofa forward and backward moving support with tightness adjusting function

Abstract

The sofa front-back moving support with the tightness adjusting function comprises a fixed seat, a movable seat and a rocker hinged between the fixed seat and the movable seat, the fixed seat and / or the movable seat are / is provided with two sets of connecting parts used for clamping the rocker, and the two sets of connecting parts are arranged on the left side and the right side of the rocker respectively. An adjusting assembly is further arranged on the fixed seat and / or the movable seat, the rocker is clamped by the two sets of connecting parts, and the clamping force of the connecting parts to the rocker is adjusted through the adjusting assembly, so that the tightness of the support can be adjusted according to different use conditions, the resistance of the rocker in the swinging process is constant, and the service life of the support is prolonged. Therefore, the adjusting force of the sofa backrest or the sofa armrest can be kept consistent, so that the sofa backrest or the sofa armrest can be kept at a certain angle, and the condition of random swinging is avoided; and by arranging the adjusting assembly, the stability of the support can be improved, the service life of the support can be prolonged to a certain extent, and excessive abrasion is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sofa accessories, in particular to a sofa forward and backward moving bracket with elastic adjustment function. Background Art

[0002] The applicant has previously applied for and disclosed a forward and backward moving bracket for use on a sofa, and the patent application number is CN201621016670.3, a Chinese utility model patent, which includes an upper and a lower connecting plate, which are connected to each other by two parallel rockers, and the two ends of the rocker are respectively fixedly connected to a rotating shaft, and the upper and lower connecting plates are respectively provided with a plurality of vertical plates, and the vertical plates are provided with connecting holes for the rotating shaft to pass through. The rocker in the above structure is fixedly connected to the rotating shaft, and the rotating shaft is installed in the plurality of vertical plates by a transition connection. There is no connection gap between the rocker and the rotating shaft, and no shaking will occur. The rotating shaft is connected to the plurality of vertical plates at the same time, with a long connection distance and high stability. Furthermore, each two vertical plates are formed by bending a metal plate, which enhances the firmness of the entire bracket and can withstand higher strength external forces.

[0003] In the above structure, although the transition fit between the rotating shaft and the connecting hole can provide stability for the rocker, after a long time, the friction force will cause the rotating shaft to wear, resulting in loose fit between the rotating shaft and the connecting hole. The resistance to the swing of the rocker becomes smaller and smaller, and it is impossible to maintain a certain angle. This will cause the sofa backrest or armrest to become looser and looser during adjustment and movement, and the adjustment force cannot be controlled, resulting in random swinging.

[0004] In addition, as the fit between the rotating shaft and the connecting hole becomes loose, the bracket will also become loose, thereby reducing the stability of the bracket, so it is necessary to improve the existing structure. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a sofa forward and backward moving bracket with elastic adjustment.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A sofa forward and backward moving bracket with tension adjustment comprises a fixed seat, a movable seat and a rocker hinged between the fixed seat and the movable seat, wherein the fixed seat and / or the movable seat are provided with a connecting part for clamping the rocker, wherein the connecting part is provided with two groups and respectively arranged on the left and right sides of the rocker, and the fixed seat and / or the movable seat are also provided with an adjusting component, wherein the middle part of the adjusting component passes through the two groups of connecting parts, and the two ends of the adjusting component respectively abut against the outer sides of the two groups of connecting parts, and the adjusting component adjusts the clamping force of the connecting part on the rocker.

[0008] Further, rotating shafts are provided at both ends of the rocker, and the rotating shafts are rotatably fitted on the fixed seat and / or the movable seat. The rotating shafts symmetrically extend to the left and right at the end portions of the rocker, and the extended rotating shafts respectively pass through the connecting portions on the left and right sides.

[0009] Further, the adjusting assembly includes a bolt and a nut. The head of the bolt abuts against the outer side of a connecting portion, the rod portion of the bolt passes through two sets of connecting portions and then cooperates with the nut, and after the nut is tightened, it abuts against the outer side of the other connecting portion.

[0010] Further, two rockers are provided. Both ends of the first rocker are respectively hinged to the front side of the connecting portion, and both ends of the second rocker are respectively hinged to the rear side of the connecting portion. The fixed seat, the movable seat and the two rockers form a parallelogram mechanism. The adjusting assembly is arranged in the middle of the connecting portion. When the rocker rotates to a predetermined angle, the rod body of the rocker abuts against the bolt to form an angle limit.

[0011] In the present utility model, the fixed seat and / or the movable seat includes two fixed portions that are relatively fitted left and right. The connecting portion on the left is vertically connected to the bottom of the left fixed portion, and the connecting portion on the right is vertically connected to the bottom of the right fixed portion. When the two sets of connecting portions on the left and right are sleeved on the rotating shaft, the two fixed portions are closed and fitted with each other.

[0012] Further, a limiting groove is provided on the closing surface of one of the fixed portions, and a limiting block is provided on the closing surface of the other fixed portion. After the two fixed portions are closed with each other, the limiting block is fitted in the limiting groove to form a limit.

[0013] Further, structural reinforcing ribs are provided between the outer sides of the two sets of connecting portions and the fixed portions, and the structural reinforcing ribs are correspondingly arranged at the positions where the rotating shaft passes through. A limiting reinforcing rib is also provided on one of the connecting portions. The limiting reinforcing ribs are provided in two groups and are respectively arranged on both sides of the bolt. The head of the bolt abuts against the limiting reinforcing ribs on both sides to prevent rotation.

[0014] In the present utility model, a rotating sleeve is sleeved on the rotating shaft. The end surface of the inner side of the rotating sleeve expands outward to form a pressing ring. After the rocker is installed, the pressing ring abuts between the connecting portion and the rocker.

[0015] The present utility model has the following advantages and beneficial effects:

[0016] By providing two sets of connecting parts on the fixed seat and / or the movable seat, the two sets of connecting parts clamp the rocker, and the clamping force of the connecting parts on the rocker is adjusted by an adjusting component. Thus, the tightness of the bracket can be adjusted according to different usage situations, so that the resistance is constant during the swinging process of the rocker, so that the adjustment force of the sofa backrest or the sofa armrest can be kept consistent and can be maintained at a certain angle, avoiding the situation of random swinging; by providing the adjusting component, the stability of the bracket can also be improved, and the service life of the bracket can be improved to a certain extent, avoiding excessive wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the drawings and embodiments:

[0018] Figure 1 is a perspective view of the bracket in this embodiment;

[0019] Figure 2 is an exploded view of the movable seat in this embodiment;

[0020] Figure 3 is a side view of the bracket in this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The present invention is not limited to the following embodiments.

[0022] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, the directional indications will also change accordingly.

[0023] In addition, if there is a description involving "first" or "second" in the embodiments of the present invention, then the description of "first" or "second" is only for descriptive purposes and cannot be understood as indicating or implying its relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0024] AsFigures 1 to 3 As shown, the present embodiment discloses a sofa forward and backward moving bracket with tension adjustment, comprising a fixed seat 1 for fixing on a sofa body, a movable seat 2 for connecting sofa accessories, and a rocker 3 hinged between the fixed seat 1 and the movable seat 2, wherein the fixed seat 1 and / or the movable seat 2 are provided with a connecting portion 21 for clamping the rocker 3, wherein the connecting portion 21 is provided with two groups and respectively arranged on the left and right sides of the rocker 3, and the fixed seat 1 and / or the movable seat 2 are further provided with an adjusting component 4 for adjusting the distance between the two connecting portions 21, wherein the adjusting component 4 passes through the two groups of connecting portions 21 and the two ends thereof respectively abut against the outer sides of the connecting portions 21 on both sides, and the two groups of connecting portions 21 can be driven to move closer to each other through the adjusting component 4, thereby changing the clamping force on the rocker 3.

[0025] Specifically, both ends of the rocker 3 are provided with a rotating shaft 31 for rotatably engaging with the fixed seat 1 and / or the movable seat 2, and the rotating shaft 31 extends symmetrically to the left and right sides at the ends of the rocker 3, and the extended rotating shaft 31 passes through the connecting parts 21 on the left and right sides respectively.

[0026] Furthermore, the adjustment component 4 is composed of a bolt 41 and a nut 42. The head of the bolt 41 is against the outside of a connecting part 21. The rod of the bolt 41 passes through two groups of connecting parts 21 and cooperates with the nut 42. After the nut 42 is tightened, it is against the outside of another connecting part 21. By rotating the bolt 41 or the bolt 41 to adjust the tightness of the connecting part 21, the adjustment strength can be improved, the stability can be increased, and loosening can be avoided.

[0027] Furthermore, the rocker arms 3 are provided with two, and the two ends of the first rocker arm 3 are respectively hinged at the front sides of the connecting parts 21 on the fixed seat 1 and the movable seat 2, and the two ends of the second rocker arm 3 are respectively hinged at the rear sides of the connecting parts 21 on the fixed seat 1 and the movable seat 2. The fixed seat 1, the movable seat 2 and the two rocker arms 3 form a parallelogram mechanism, and the movable seat 2 can be moved in parallel through the formed parallelogram mechanism; specifically, the adjustment component 4 is arranged on the connecting part 21 in the middle of the two rocker arms 3, and when the rocker arm 3 is rotated to a certain angle, the rod body of the rocker arm 3 will abut against the bolt 41 to form an angle limit.

[0028] In this embodiment, in order to facilitate the articulation of the rocker 3, the fixed seat 1 and / or the movable seat 2 includes two left and right relatively matched fixed parts 22, and the two groups of the connecting parts 21 are respectively vertically connected to the bottom of the two fixed parts 22, specifically, the left connecting part 21 is integrally formed with the left fixed part 22, and the right connecting part 21 is integrally formed with the right fixed part 22. Preferably, the left connecting part 21 is arranged on the inner side of the left fixed part 22, and the right connecting part 21 is arranged on the inner side of the right fixed part 22. When the left and right groups of connecting parts 21 are sleeved on the rotating shaft 31, the two fixed parts 22 are closed and matched with each other.

[0029] Further, in order to prevent the two fixing parts from being misaligned with each other, a concave limiting groove 23 is provided on the closing surface of one of the fixing parts 22, and a limiting block 24 extending outward is provided on the closing surface of the other fixing part 22. After the two fixing parts 22 are closed to each other, the limiting block 24 is engaged in the limiting groove 23 to form a limit.

[0030] Further, in order to improve the connection strength between the connecting part 21 and the fixing part 22, structural reinforcing ribs 25 are provided between the outer sides of the two groups of connecting parts 21 and the fixing part 22. The structural reinforcing ribs 25 are correspondingly arranged at the positions where the rotating shaft 31 passes through. In addition, a limiting and reinforcing rib 26 for preventing the bolt 41 from rotating during the adjustment of the adjusting assembly 4 is further provided on the connecting part 21 against which the head of the bolt 41 presses. The limiting and reinforcing ribs 26 are provided in two groups and are respectively arranged on both sides of the head of the bolt 41. The head of the bolt 41 is a hexagonal structure, and the head of the bolt 41 abuts against the limiting and reinforcing ribs 26 on both sides to prevent rotation.

[0031] In this embodiment, in order to improve the clamping effect of the adjusting assembly 4 and avoid large friction between the rotating shaft 31 on the rocker 3 and the connecting part 21, a rotating sleeve 32 is sleeved on the rotating shaft 31. The end surface of the inner side of the rotating sleeve 32 expands outward to form a pressing ring 321. After the rocker 3 is installed, the pressing ring 321 abuts between the connecting part 21 and the rocker 3. Preferably, the rotating sleeve 32 is made of wear-resistant material. When the left and right two groups of connecting parts 21 clamp the rocker 3, the rotating sleeve 32 can replace the mutual contact between the two, thereby reducing friction.

[0032] What is described above in this specification is only an example of the present invention. Those skilled in the technical field to which the present invention belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, as long as they do not deviate from the content of this specification of the present invention or exceed the scope defined by this claim book, they should all belong to the protection scope of the present invention.

Claims

1. A front-back moving bracket for a sofa with tension adjustment, comprising a fixed seat (1), a movable seat (2), and a rocker (3) hinged between the fixed seat (1) and the movable seat (2), characterized in that: The fixed seat (1) and / or the movable seat (2) are provided with connecting parts (21) for clamping the rocker (3). There are two sets of the connecting parts (21) which are respectively arranged on the left and right sides of the rocker (3). The fixed seat (1) and / or the movable seat (2) are also provided with an adjusting component (4). The middle part of the adjusting component (4) passes through the two sets of connecting parts (21), and the two ends of the adjusting component (4) respectively abut against the outer sides of the two sets of connecting parts (21). The adjusting component (4) adjusts the clamping force of the connecting parts (21) on the rocker (3).

2. The front and rear moving bracket of a sofa with tension adjustment according to claim 1, wherein: The two ends of the rocker (3) are provided with rotating shafts (31) which are rotatably matched with the fixed seat (1) and / or the movable seat (2). The rotating shafts (31) symmetrically extend to the left and right sides at the end parts of the rocker (3), and the extended rotating shafts (31) respectively pass through the connecting parts (21) on the left and right sides.

3. The front-back moving bracket of the sofa with elastic adjustment according to claim 2, characterized in that: The adjusting component (4) includes a bolt (41) and a nut (42). The head of the bolt (41) abuts against the outer side of one connecting part (21). The rod part of the bolt (41) passes through the two sets of connecting parts (21) and then cooperates with the nut (42). After the nut (42) is tightened, it abuts against the outer side of the other connecting part (21).

4. The front and rear moving bracket of a sofa with tension adjustment according to claim 3, characterized in that: There are two rockers (3). The two ends of the first rocker (3) are respectively hinged to the front side of the connecting parts (21), and the two ends of the second rocker (3) are respectively hinged to the rear side of the connecting parts (21). The fixed seat (1), the movable seat (2) and the two rockers (3) form a parallelogram mechanism. The adjusting component (4) is arranged in the middle of the connecting parts (21). When the rocker (3) rotates to a predetermined angle, the rod body of the rocker (3) abuts against the bolt (41) to form an angle limit.

5. A front-back moving bracket for a sofa with tension adjustment according to any one of claims 1-4, characterized in that: The fixed seat (1) and / or the movable seat (2) include two fixed parts (22) which are matched with each other left and right. The left connecting part (21) is vertically connected to the bottom of the left fixed part (22), and the right connecting part (21) is vertically connected to the bottom of the right fixed part (22). When the left and right two sets of connecting parts (21) are sleeved on the rotating shaft (31), the two fixed parts (22) are closed and matched with each other.

6. The front and rear moving bracket of a sofa with tension adjustment according to claim 5, characterized in that: A limiting groove (23) is arranged on the closing surface of one of the fixed parts (22), and a limiting block (24) is arranged on the closing surface of the other fixed part (22). After the two fixed parts (22) are closed with each other, the limiting block (24) is fitted in the limiting groove (23) to form a limit.

7. The front and rear moving bracket of a sofa with elastic adjustment according to claim 6, characterized in that: Structural reinforcing ribs (25) are arranged between the outer sides of the two sets of connecting parts (21) and the fixed parts (22). The structural reinforcing ribs (25) are correspondingly arranged at the positions where the rotating shaft (31) passes through. A limiting reinforcing rib (26) is also arranged on one of the connecting parts (21). The limiting reinforcing ribs (26) are arranged in two sets and are respectively arranged on both sides of the bolt (41). The head of the bolt (41) abuts against the limiting reinforcing ribs (26) on both sides to prevent rotation.

8. The front and rear moving bracket of a sofa with tension adjustment according to claim 2, characterized in that: A rotating sleeve (32) is sleeved on the rotating shaft (31). The end face on the inner side of the rotating sleeve (32) expands outward to form a pressing ring (321). After the rocker (3) is installed, the pressing ring (321) abuts between the connecting portion (21) and the rocker (3).

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