Flexible linkage structure of office chair armrest

Abstract

The utility model belongs to the technical field of parts of chairs, and discloses an office chair armrest flexible linkage structure which comprises a chair surface and a chair back which are movably connected through a swing structure, so that the chair back can swing around the chair surface in the vertical direction under the linkage of the swing structure, armrest frames are fixedly connected to the two sides of the chair surface, and the armrest frames are fixedly connected with the chair surface. The two sides of the chair back are respectively connected with two linkage handrail belts, one end of each linkage handrail belt is a bendable flexible belt-shaped body and is connected with the chair back, the other end of each linkage handrail belt is connected with a sliding block facing the handrail frame, and the handrail frame is provided with a sliding rail matched with the sliding block. According to the technical scheme, through a simple flexible linkage structure, reasonable linkage of the armrests and the chair back is achieved, adjustment of the positions of the armrests can be completed along with change of the angle of the backrest, a user can obtain good use experience, and rationalization of the office chair structure is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of chair parts, and more specifically relates to a flexible linkage structure for an office chair armrest. Background Art

[0002] An office chair is a type of chair that generally provides good comfort for people who work at a desk for a long time. Compared with ordinary backrest chairs or armrest backrest chairs, office chairs usually have a softer and more comfortable seat surface or backrest, a curve that better fits the natural curvature of the user's legs or back, a certain degree of convenient mobility, or one or several of the performance of a certain degree of sitting posture adjustment structure. Based on the above performance indicators, compared with chairs composed of conventional rigid structures, office chairs take into account that users usually cannot keep moving, and maintaining a posture for a long time is likely to induce physical strain on the user, so their structure is more complex.

[0003] According to the cost of design and manufacture, the performance indicators of office chairs will evolve from simple softness and comfort to a combination of multiple types of performance elements. In high-comfort office chair products, generally, the backrest can be adjusted at different lumbar support amplitudes through the positioning ability of the swing mechanism at different angles relative to the seat surface. This swing mechanism can be manually adjusted, elastically adaptive, or mechanically controlled. However, no matter which method is used, as the angle between the backrest and the bottom surface becomes smaller and the user's body tends to lie flat, if the armrests cannot adapt to the change of the user's posture, the user's arms will not be well supported by the armrests, causing discomfort during use. Therefore, correspondingly, while office chairs have the function of adjusting the backrest angle, they will also specifically add a front-back position adjustment structure or a pitching angle adjustment structure for the armrests to adapt to the occasion where the position of the arms changes due to the change of the user's posture.

[0004] Considering that if the above-mentioned change in the position of the armrests and the change in the angle of the backrest both need to be adjusted separately by the user, the user will feel a certain degree of inconvenience. Therefore, subsequent office chair products have designed a mechanical linkage structure between the backrest and the armrests, so that when the backrest changes its pitching angle, it can be linked with the armrests through mechanical connectors, thereby driving the armrests to change their positions accordingly, which well solves the problem of uncomfortable operation. However, these armrest linkage structures generally rely on the reasonable design structure of the linkage parts, the structural strength of the linkage parts, and how to connect them reasonably with the backrest or the backrest, etc. The cooperation of multiple factors puts forward relatively high requirements for the design and manufacture of a more comfortable linkage structure.

[0005] For existing office chairs that control the backrest angle through mechanical adjustment, if a more convenient armrest linkage structure with the same linkage effect can be designed, it can reduce the design and manufacturing cost of office chairs to a certain extent. At the same time, since the armrest structure is not always the core performance index of office chairs, a more comfortable and simple linkage armrest structure can encourage office chair developers to shift their focus to the main research and development direction of improving the core performance of office chairs, thereby helping to reasonably improve the R & D efficiency of new office chairs. Summary of the Invention

[0006] In view of the technical defects in the background art, the present utility model proposes a flexible linkage structure for an office chair armrest, which solves the above technical problems and meets the actual needs. The specific technical solutions are as follows:

[0007] A flexible linkage structure for an office chair armrest includes a seat surface and a backrest. The seat surface and the backrest are movably connected by a swinging structure, so that the backrest can swing vertically around the seat surface under the linkage of the swinging structure. Armrest frames are fixedly connected to both sides of the seat surface. Two linkage armrest belts are respectively connected to both sides of the backrest. One end of the linkage armrest belt is a bendable flexible belt body and is connected to the backrest, and the other end is connected to a slider facing the armrest frame. The armrest frame is provided with a slide rail that cooperates with the slider.

[0008] As a further extension of the above technical solution, a section of guide groove is provided at the end of the armrest frame close to the slide rail along the extension direction of the slider movement. The width of the guide groove is adapted to the width of the slider.

[0009] As a further optional item of this extended solution, the guide groove is provided at one end of the armrest frame close to the backrest.

[0010] As a further extension of the above technical solution, a cover plate that fits against the side of the armrest frame is further provided between the linkage armrest belt and the slider. The cover plate is integrally bent. One side of it is basically horizontal and covers the slider and the armrest frame, and the other side is vertically bent downward from the side of the linkage armrest belt and then tends to the seat surface.

[0011] As a further optional item of this extended solution, one end of the flexible belt body is connected to both sides of the backrest in a fitting manner and is pulled or pushed by the swing of the backrest around the seat surface, and the other end covers the upper end face of the cover plate.

[0012] As a further optional item of this extended solution, the cover plate is provided with a slider fixing groove, and the slider is positioned and installed in the slider fixing groove.

[0013] As a further extension of the above technical solution, an auxiliary guiding groove is provided on one side of the slide rail parallel to the slide rail on the armrest frame, and the linkage armrest belt is provided with a sliding member that can linearly slide along the auxiliary guiding groove.

[0014] The beneficial effects of the present utility model are as follows: This structure preferably simplifies the armrest linkage structure of the movable office chair with a backrest, abandons the necessary linkage form of rigid linkage parts and non-critical mating parts such as armrest positioning parts, and enables the position change of the armrest to be achieved only through translation. On the one hand, the flexible linkage part between the armrest and the backrest can achieve the necessary linkage effect, and at the same time, it can also meet the reasonable adaptive attitude adjustment requirements for the change of the user's arm posture. Therefore, it is a simple, practical and easy-to-popularize technical solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the flexible armrest linkage structure of the office chair described in the present utility model.

[0016] Figure 2 It is a schematic diagram of the implementation effect of the flexible armrest linkage structure of the office chair described in the present utility model.

[0017] Figure 3 It is a schematic diagram of the structural relationship between the cover plate and the armrest frame described in the present utility model.

[0018] Among them: chair surface 1, backrest 2, swing structure 3, armrest frame 4, slide rail 40, guide groove 41, auxiliary guide groove 42, linkage armrest belt 5, flexible strip 50, slider 51, cover plate 52. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following combines the drawings with related embodiments to illustrate the implementation manners of the present utility model. The implementation manners of the present utility model are not limited to the following embodiments, and the related necessary components involved in the present utility model should be regarded as well-known technologies in the technical field, which can be known and mastered by those skilled in the technical field.

[0020] Combined with Figures 1 to 3 As shown, the present utility model discloses a flexible armrest linkage structure for an office chair, and the basic components of its technical solution include the following elements:

[0021] The chair surface 1 and the backrest 2, the chair surface 1 and the backrest 2 are movably connected through a swing structure 3, so that the backrest 2 can swing vertically around the chair surface 1 under the linkage of the swing structure 3; the setting of this structure is basically the same as that of the existing office chair that connects the backrest and the chair surface through a similar hinge structure, and the backrest angle adjustment principle is also the same. Therefore, the design of this structure here does not need to be considered too much. Only considering that the armrest linkage structure is a flexible part linkage, the connecting part between the backrest 2 and the chair surface 1 needs to consider a certain posture maintaining ability, such as a manual positioning structure or an elastic reset structure. Otherwise, the armrest is easily damaged by the posture change action of the backrest 2 with too much force due to the self-characteristics of the flexible linkage part.

[0022] On both sides of the seat surface 1, there are fixedly connected armrest frames 4; in this application, in order to achieve the required armrest linkage effect, the armrest frame 4 is only fixedly connected to the seat surface 1, and the connection structure can be changed according to the material design requirements, but there is no other linkage structure between the armrest frame 4 and the backrest 2 except for the linkage parts.

[0023] On both sides of the backrest 2, there are respectively connected two linkage armrest belts 5. One end of the linkage armrest belt 5 is a bendable flexible belt body 50 and is connected to the backrest 2 with it, and the other end is connected with a slider 51 facing the armrest frame; this structure is the main technical point of the present utility model. The linkage part between the backrest 2 and the armrest frame 4 is the linkage armrest belt 5 with the characteristic of flexible deformation. Specifically, one end of the flexible belt body 50 is fixedly connected to the backrest 2, and the other end of the flexible belt body 50 is nested and matched with a slide rail 40 fixed on the armrest frame 4 through the slider 51 to achieve the effect that the slider 51 linearly slides along the slide rail 40. And the linkage armrest belt 5 itself has a flexible belt body 50 with flexible deformation. Considering the needs of linkage and the need to place the arm, its length is usually greater than the straight-line distance between the connection of the flexible belt body 50 and the backrest 2 and the connection of the flexible belt body 50 and the slider 51, and it is in a natural bent state under the default state.

[0024] The armrest frame 4 is provided with a slide rail 40 that cooperates with the slider 51; the preferred limit form between the slide rail 40 and the slider 51 is only a sliding pair, that is, the slider 51 is embedded on the slide rail 40, and the external force cannot randomly peel the slider 51 from the slide rail 40, and the slider 51 will not come out of the two ends of the slide rail 40 stroke under non-essential conditions, ensuring the reliability of the linkage part. But in addition, there is no positioning and limiting structure of the slider 51 relative to the slide rail 40. That is to say, under the action of an external force, the slider 51 can easily slide relative to the slide rail 40. In this way, the structural complexity and cost of the linkage part are reduced. At the same time, the limit requirement of this part is transferred to the swing structure 3 between the seat surface 1 and the backrest 2, so that the research and development of the chair focuses on improving the comfort of "sitting" rather than the comfort of arm placement. As long as the angle between the seat surface 1 and the backrest 2 remains unchanged, although the flexible belt body 50 will still be deformed by the force of the user's arm, combined with the special limit cooperation relationship between the slider 51 and the slide rail 40, the final deformation degree of the linkage armrest belt 5 will also be limited within a very small range, ensuring the stability of the armrest surface position to a certain extent.

[0025] Refer to Figures 1 to 3As shown, as a further extension of the above embodiment, the handrail frame 4 is provided with a guide groove 41 near the end of the slide rail 40 along the extension direction of the movement of the slider 51, and the width of the guide groove 41 is adapted to the width of the slider 51. The setting of the guide groove 41 is mainly for the convenience of the slider 51 being in a long strip shape. If there is interference with the surface shape of the handrail frame 4, the guide groove 41 is opened to make way, thereby facilitating the linear sliding of the slider 51 relative to the slide rail 40.

[0026] Reference Figures 1 to 3 As shown, as a further optimization item of the above embodiment, the guide groove 41 is arranged at one end of the armrest frame 4 close to the chair back 2. The optimization of this solution is based on the fact that the chair back 2 usually moves away from the seat surface 1 toward the horizontal plane, so the movement direction of the slider 51 is naturally away from the seat surface 1 and close to the chair back 2.

[0027] Reference Figures 1 to 3 As shown, as a further extension of the above embodiment, a cover plate 52 is further provided between the linkage armrest belt 5 and the slider 51 and is attached to the side of the armrest frame. The cover plate 52 is bent as a whole, and one side thereof is basically horizontal and covers the top of the slider 51 and the armrest frame 4, and the other side is bent vertically downward from the side of the linkage armrest belt 5 and then tends to the seat surface 1. The setting of the cover plate 52 facilitates the connection between the flexible belt body 50 and the slider 51, and the slider 51 also has a better connection structure, so that the structural reliability of the linkage armrest belt 4 is better. On the other hand, the part of the cover plate 52 bent toward the seat surface 1 can also prevent the user's clothes or hair from being rolled into between the slider 51 and the slide rail 40, thereby improving convenience and comfort.

[0028] Reference Figures 1 to 3 As shown, as a further optimization item of the above embodiment, one end of the flexible strip 50 is connected to both sides of the chair back 2 and is pulled or pushed as the chair back 2 swings around the seat surface 1, and the other end covers the upper end surface of the cover plate 52. This optimization item is a further extension of the above scheme, emphasizing the role of the cover plate 52 as a connecting piece.

[0029] As a further optimization item of the above embodiment, the cover plate 52 is provided with a slider fixing groove, and the slider 51 is positioned and installed in the slider fixing groove. Since the above structure is provided for fixing the slider 51, its setting difficulty is very low, but it helps to improve the structural reliability of the linkage handrail 5. Therefore, the position of the slider fixing groove is not shown in the figure, but those skilled in the art can understand that the connection between the cover plate 52 and the slider 51 does not involve the intervention of other forms of linkage parts, so the solution can be implemented normally.

[0030] Combination Figure 3As shown in the figure, as a further extension of the above embodiment, the armrest frame 4 is provided with an auxiliary guiding groove 42 on one side of the slide rail 40 parallel to the slide rail 40. The linkage armrest belt 5 is provided with a sliding member that can linearly slide along the auxiliary guiding groove 42. The setting of the auxiliary guiding groove 42 is an additional structure for further improving the reliability of the entire linkage structure. The auxiliary guiding groove 42 + the sliding member, and the slider 51 and the slide rail 40 cooperate in pairs to form a form similar to double-track parallel, so that the movement of the linkage armrest belt 5 relative to the armrest frame 4 is smoother and more reliable.

[0031] Generally speaking, the technical solution of the flexible linkage structure of the armrest disclosed in the present invention simplifies the armrest linkage structure of the movable office chair with a backrest well. It abandons the necessary linkage form of the rigid linkage member and non-critical mating parts such as the armrest positioning member, and allows the position change of the armrest to be achieved only by translation. On the one hand, the flexible linkage member between the armrest and the backrest can play a necessary linkage effect, and at the same time, it can also meet the reasonable adaptive attitude adjustment requirements for the change of the user's arm posture. Therefore, it is a simple, practical and easy-to-popularize technical solution.

[0032] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can still be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A flexible linkage structure for an office chair armrest, comprising a seat surface and a seat back, wherein the seat surface and the seat back are movably connected via a swing structure, so that the seat back can swing in a vertical direction around the seat surface along the linkage of the swing structure, and armrest frames are fixedly connected to both sides of the seat surface, characterized in that: Two linked armrest belts are respectively connected to both sides of the chair back, one end of the linked armrest belt is a bendable flexible belt body and is connected to the chair back, and the other end is connected to a slider facing the armrest frame, and the armrest frame is provided with a slide rail that cooperates with the slider.

2. The office chair armrest flexible linkage structure according to claim 1, characterized in that: The handrail frame is provided with a guide groove at the end portion of the slide rail along the extension direction of the movement of the slide block, and the width of the guide groove is adapted to the width of the slide block.

3. The office chair armrest flexible linkage structure according to claim 2, characterized in that: The guide groove is arranged at one end of the armrest frame close to the chair back.

4. The office chair armrest flexible linkage structure according to claim 1, characterized in that: A cover plate is provided between the linkage armrest belt and the slider and is attached to the side of the armrest frame. The cover plate is bent as a whole, one side of which is basically horizontal and covers the top of the slider and the armrest frame, and the other side is bent vertically downward from the side of the linkage armrest belt and then tends to the chair surface.

5. The office chair armrest flexible linkage structure according to claim 4, characterized in that: One end of the flexible belt-shaped body is connected to the two sides of the chair back and is pulled or pushed as the chair back swings around the seat surface, and the other end covers the upper end surface of the cover plate.

6. The office chair armrest flexible linkage structure according to claim 4, characterized in that: The cover plate is provided with a slider fixing groove, and the slider is positioned and installed in the slider fixing groove.

7. The office chair armrest flexible linkage structure according to claim 1, characterized in that: The handrail frame is parallel to the slide rail and is provided with an auxiliary guide groove on one side of the slide rail, and the linked handrail belt is provided with a sliding member which can slide linearly along the auxiliary guide groove.

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