Armrest structure of chair

Abstract

A chair armrest structure is characterized in that one end of an armrest rod is rotatably mounted on a chair seat and a backrest, the other end of the armrest rod is connected with a rotatable rotating seat, and a supporting plate capable of linearly moving is mounted on the rotating seat, so that a plurality of adjustable degrees of freedom are formed. Through the adjustment of the chair armrest structure, the supporting plate forms different front and back positions or orientations, so that the use requirements of different crowds are met, and the individual difference requirements of people are greatly met.

Description

Technical Field

[0001] The utility model relates to a chair, in particular to an adjustable armrest structure on a chair. Background Art

[0002] Generally, a chair is equipped with armrests, which can support the user's arms to reduce the fatigue of the arms and improve the comfort of using the chair. The armrests of traditional chairs are of a fixed structure, which are fixedly installed on the seat or the backrest of the chair. However, this kind of armrest will inevitably cause some obstructions in many cases and may not be suitable for everyone. Therefore, some current chairs are designed with a rotatable armrest structure, which can be flipped forward to be a normal armrest or flipped outward to the side of the backrest, so as to achieve a certain degree of hiding and exposing the space on the side of the seat, and the user can pass through the side space more conveniently. However, the adjustment function of this kind of armrest is still too single and cannot meet the increasingly high personalized requirements of people. Content of the Utility Model

[0003] The purpose of the utility model is to provide an armrest structure of a chair that can be adjusted in multiple degrees of freedom to meet different usage needs.

[0004] The armrest structure of the chair described in the utility model includes an armrest rod and a tray for the user to place the hand. One end of the armrest rod is installed on the backrest or the seat of the chair, and a rotatable rotating seat is installed at the other end of the armrest rod. The tray is installed on the rotating seat in a linearly movable manner.

[0005] Further, the end of the armrest rod is rotatably installed on the backrest or the seat of the chair.

[0006] Further, a concave circular adjustment groove is provided on the side of the backrest. At both ends of one diameter along the inner wall of the adjustment groove, there are limiting blocks protruding towards the center of the circle. A convex shaft protruding from the armrest rod is clamped between the two limiting blocks. Sector-shaped clamping blocks are provided on both sides of the convex shaft. The clamping blocks are arranged in the adjustment groove and between the circumferences of the two limiting blocks, and the central angle of the clamping blocks is smaller than the circumferential spacing between the two limiting blocks.

[0007] Further, an adjustment plate is installed on the armrest rod. A positioning shaft is installed in the middle of the top surface of the adjustment plate. A number of concave positioning dimples are arranged at intervals along the circumference with the axis of the positioning shaft as the center on the top surface of the adjustment plate; the rotating seat is rotatably sleeved on the positioning shaft. A positioning hole is recessed inward on the bottom surface of the rotating seat. A positioning rod that can move along the positioning hole is placed in the positioning hole, and a positioning compression spring is installed between the positioning rod and the positioning hole.

[0008] Further, the ends of the positioning dimples and the positioning rod are both spherical.

[0009] Further, the positioning shaft includes a shaft seat fixedly arranged on the adjusting plate and a limiting shaft detachably connected to the shaft seat. The rotating seat is mounted on the shaft seat or the limiting shaft through the mounting hole, and the diameter of the end of the limiting shaft is larger than that of the mounting hole.

[0010] Further, the supporting plate is hollowly arranged and several limiting grooves are arranged on its inner wall along the adjusting direction; the rotating seat is arranged in the supporting plate, and limiting holes are arranged at the positions where the side surface of the rotating seat faces the limiting grooves. A limiting rod that can move along the limiting hole is placed in the limiting hole, and a limiting compression spring is also installed in the limiting hole. The limiting compression spring connects the limiting rod and applies a force pointing to the inner wall of the supporting plate to it.

[0011] Further, the supporting plate includes a supporting plate shell that is hollowly arranged and has an opening at the top, and a top cover covering the opening at the top of the supporting plate shell. The limiting grooves are arranged on the inner wall of the supporting plate shell.

[0012] Further, the end of the limiting rod is spherical, and the limiting groove is a spherical groove or a long-strip-shaped arc groove.

[0013] Further, corresponding limiting grooves are arranged at two opposite inner walls of the supporting plate. The rotating seat can be provided with corresponding limiting holes, limiting rods and limiting compression springs on both sides, or the limiting holes can penetrate through both sides of the rotating seat. Limiting rods are arranged at both ends of the limiting hole, and both ends of the limiting compression spring are respectively connected to the two limiting rods.

[0014] For the chair armrest structure of the present utility model, the conventional chair armrest is divided into an armrest rod and a supporting plate. The armrest rod can be installed on the backrest or the seat according to the chair type and usage needs. The armrest rod and the supporting plate are connected through a rotating seat; the rotating seat is rotatably installed on the armrest rod, and specifically, various devices such as a rotating shaft, a bearing, a ball head or other rotatable devices can be used for connection to ensure that the rotating seat has the freedom of horizontal rotation. When the rotating seat rotates, it can drive the supporting plate to rotate synchronously; on the other hand, the supporting plate is movably installed on the rotating seat. For example, a guide rail and a slider that slide relative to each other are arranged between the two, or a telescopic rod, a telescopic motor, etc. are used for connection, so that the supporting plate can have the freedom of linear movement relative to the rotating seat. Through the adjustment of this chair armrest structure, finally, the supporting plate forms different front-back positions or orientations, so as to meet the usage needs of different people, greatly meeting the requirements of people's individual differences. Moreover, the supporting plate and the rotating seat are detachably arranged, and they are easy to assemble and disassemble, which is convenient for production and subsequent maintenance. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the chair armrest structure.

[0016] Figure 2 is a schematic partial structural diagram of the backrest.

[0017] Figure 3 、4 It is a schematic diagram of the connection structure of the armrest rod, the support plate and the rotating seat.

[0018] Figure 5 It is a schematic diagram of the connection structure of the support plate and the rotating seat.

[0019] Figure 6 、 7 It is a schematic diagram of the connection structure of the rotating seat and the adjusting plate.

[0020] Figure 8 It is a schematic diagram of the connection structure between the internal parts of the rotating seat and the adjusting plate.

[0021] Figure 9 It is a schematic diagram of the connection structure of the rotating seat, the limiting rod and the limiting compression spring.

[0022] Reference numerals: armrest rod 1, support plate 2, support plate shell 21, top cover 22, limiting groove 23, rotating seat 3, positioning hole 31, limiting hole 32, adjusting plate 4, positioning concave point 41, positioning shaft 5, shaft seat 51, limiting shaft 52, positioning rod 6, positioning compression spring 7, limiting rod 8, limiting compression spring 9, backrest 10, adjusting groove 11, limiting block 12, convex shaft 13, clamping block 14. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] 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 the components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0025] If there are descriptions such as "first" or "second" in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0026] The present utility model provides a chair armrest structure.

[0027] The chair armrest structure of this embodiment includes an armrest rod 1 and a tray 2 for placing the user's hand. One end of the armrest rod is installed on the backrest or seat of the chair, and a rotatable rotating seat 3 is installed at the other end of the armrest rod. The tray is installed on the rotating seat so as to be linearly movable.

[0028] As Figures 1-9 shown in the chair armrest structure, the armrest rod is installed on the backrest 10, and the rotating seat 3 is rotatably installed on the armrest rod, enabling the rotating seat to have the freedom of horizontal rotation. The tray 2 that directly provides support for the user's hand is installed on the rotating seat, and the tray can have the freedom of linear movement relative to the rotating seat. Through the adjustment of the rotating seat and the tray, the tray can move forward or backward to accommodate people of different builds; the tray can also adjust the angle through the rotating seat, such as the end facing forward, inward, or outward, thus meeting the individual difference requirements of people.

[0029] For the described chair armrest structure, the end of the armrest rod 1 is rotatably installed on the backrest or seat of the chair, thereby forming another degree of freedom. In combination with the rotating seat and the tray, it forms a wider adjustment range and more adjustment states, and the entire armrest can also be rotated to the side of the backrest to be hidden. The end of the armrest rod 1 can be installed on the backrest or seat through a rotating shaft, bearing, etc., or as Figures 1-4 shown, an inwardly concave circular adjustment groove 11 is provided on the side of the backrest. At both ends of one diameter along the inner wall of the adjustment groove, limit blocks 12 protruding towards the center of the circle are respectively provided. A convex shaft 13 that is inserted between the two limit blocks protrudes from the armrest rod 1. Sector-shaped clamping blocks 14 are provided on both sides of the convex shaft. The clamping blocks are arranged within the adjustment groove and between the circumferences of the two limit blocks, and the central angle of the clamping blocks is smaller than the circumferential spacing between the two limit blocks, so that the armrest rod can rotate along the adjustment groove until the clamping blocks abut against different limit blocks, thereby forming two extreme positions of adjustment.

[0030] For the described chair armrest structure, the rotating seat can be connected to the end of the armrest rod through various devices such as a rotating shaft, bearings, ball heads or other rotatable devices, or it can be as Figures 6-9 shown. An adjusting plate 4 is installed on the armrest rod 1. A positioning shaft 5 is installed in the middle of the top surface of the adjusting plate. A number of recessed positioning dimples 41 are arranged at intervals along the circumference with the axis of the positioning shaft as the center on the top surface of the adjusting plate; the rotating seat 3 is rotatably sleeved on the positioning shaft. A positioning hole 31 is recessed inward on the bottom surface of the rotating seat. A positioning rod 6 that can move along the positioning hole is placed in the positioning hole. A positioning compression spring 7 is installed between the positioning rod and the positioning hole. When the rotating seat rotates around the positioning shaft, the positioning rod contracts into the positioning hole under the action of the top surface of the adjusting plate until the positioning rod moves to be opposite to a certain positioning dimple. The positioning compression spring presses the end of the positioning rod tightly in the positioning dimple, thus forming a positioning. This adjustment structure for rotation has the advantages of simple structure and small volume. It can be conveniently installed on the armrest rod, and its operation is fast and stable, which is convenient for adjustment. In addition, in order to improve the smoothness of adjustment, the positioning dimples 41 and the ends of the positioning rods 6 can both be set to be spherical. Also, the positioning shaft 5 includes a shaft seat 51 fixedly arranged on the adjusting plate 4 and a limiting shaft 52 detachably connected to the shaft seat. The rotating seat 3 is installed on the shaft seat or the limiting shaft through an installation hole, and the diameter of the end of the limiting shaft is larger than the installation hole to limit the rotating seat, which can also improve the convenience of disassembly, assembly and maintenance.

[0031] For the described chair armrest structure, the support plate is movably installed on the rotating seat. For example, a guide rail and a slider for relative sliding are arranged between the two, or a telescopic rod, a telescopic motor, etc. are used for connection, so that the support plate can have a degree of freedom of linear movement relative to the rotating seat. It can also be as Figures 3-9As shown, the pallet 2 is hollowly arranged and a plurality of limiting grooves 23 are arranged on its inner wall along the adjusting direction; for example, the pallet 2 includes a pallet shell 21 which is hollowly arranged and has an opening at the top, and a top cover 22 covering the opening at the top of the pallet shell, and the limiting grooves 23 are arranged on the inner wall of the pallet shell; the rotating seat 3 is arranged inside the pallet, a limiting hole 32 is arranged at the position where the side surface of the rotating seat 3 faces the limiting groove, a limiting rod 8 which can move along the limiting hole is placed in the limiting hole, and a limiting compression spring 9 is also installed in the limiting hole, and the limiting compression spring connects the limiting rod and applies a force pointing to the inner wall of the pallet to it. The adjusting structure in the linear direction is similar to the adjusting structure in the rotating direction. The limiting compression spring pushes the limiting rod towards the limiting groove on the inner wall of the pallet shell, so as to form positioning. This also has the advantages of simple structure and small volume, can be conveniently installed on the pallet, and its work is fast and stable, which is convenient for the adjusting operation. Similarly, the end of the limiting rod 8 can be set to be spherical, and the limiting groove 23 can be a spherical groove or a long-strip arc-shaped groove. Further, corresponding limiting grooves are arranged at two opposite inner walls of the pallet 2, and the rotating seat can be provided with corresponding limiting holes 32, limiting rods 8 and limiting compression springs 9 on both sides, or the limiting holes 32 can penetrate through both sides of the rotating seat 3, limiting rods 8 are arranged at both ends of the limiting hole respectively, and both ends of the limiting compression spring 9 are respectively connected to the two limiting rods, which can further simplify the structure.

[0032] The foregoing are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields shall be included in the patent protection scope of the present invention.

Claims

1. A chair armrest structure, characterized in that: The utility model comprises a handrail and a support plate for placing the user's hands. One end of the handrail is installed on the chair back or the chair seat, and the other end of the handrail is installed with a rotatable rotating seat. The support plate can be installed on the rotating seat in a linearly movable manner.

2. The chair armrest structure according to claim 1, characterized in that: The end of the armrest rod is rotatably mounted on the chair back or the chair seat.

3. The chair armrest structure according to claim 2, characterized in that: A concave circular adjustment groove is provided on the side of the chair back, and limit blocks protruding toward the center of the circle are respectively provided at both ends of one diameter of the inner wall of the adjustment groove. A convex shaft protruding from the armrest rod is inserted between the two limit blocks, and fan-shaped blocks are provided on both sides of the convex shaft. The block is set in the adjustment groove and between the two limit blocks in the circumferential direction, and the central angle of the block is smaller than the circumferential spacing between the two limit blocks.

4. The chair armrest structure according to claim 1, characterized in that: An adjustment plate is installed on the handrail rod, a positioning shaft is installed in the middle of the top surface of the adjustment plate, and a plurality of recessed positioning points are arranged at circumferential intervals on the top surface of the adjustment plate with the axis of the positioning shaft as the center; the rotating seat can be rotatably sleeved on the positioning shaft, and a positioning hole is recessed inwardly on the bottom surface of the rotating seat, a positioning rod that can move along the positioning hole is placed in the positioning hole, and a positioning compression spring is installed between the positioning rod and the positioning hole.

5. The chair armrest structure according to claim 4, characterized in that: The positioning concave point and the end of the positioning rod are both spherical.

6. The chair armrest structure according to claim 4, characterized in that: The positioning shaft includes a shaft seat fixedly arranged on the adjustment plate, and a limiting shaft detachably connected to the shaft seat. The rotating seat is installed on the shaft seat or the limiting shaft through a mounting hole, and the diameter of the end of the limiting shaft is larger than the mounting hole.

7. The chair armrest structure according to any one of claims 1 to 6, characterized in that: The support plate is hollow and its inner wall is provided with a plurality of limit grooves along the adjustment direction; the rotating seat is arranged in the support plate, and a limit hole is provided on the side of the rotating seat opposite to the limit groove, and a limit rod movable along the limit hole is placed in the limit hole, and a limit compression spring is also installed in the limit hole, which is connected to the limit rod and applies a force to it directed to the inner wall of the support plate.

8. The chair armrest structure according to claim 7, characterized in that: The support plate comprises a support plate shell which is hollow and has an opening on the top, and a top cover which covers the opening on the top of the support plate shell, and a limiting groove is arranged on the inner wall of the support plate shell.

9. The chair armrest structure according to claim 7, characterized in that: The end of the limiting rod is spherical, and the limiting groove is a spherical groove or a long arc groove.

10. The chair armrest structure according to claim 7, characterized in that: Limiting grooves are correspondingly arranged at the two opposite inner walls of the support plate, and corresponding limiting holes, limiting rods and limiting compression springs are arranged on both sides of the rotating seat, so that the limiting holes pass through both sides of the rotating seat, limiting rods are respectively arranged at both ends of the limiting holes, and the two ends of the limiting compression spring are respectively connected to the two limiting rods.

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