Armrest for office chair

Abstract

An armrest for an office chair is used for solving the problems that in the prior art, an office chair armrest in the prior art can support arms of a user, but due to the fact that an arm supporting face of the armrest is relatively horizontal with the ground, when the position of the arms of the user is changed, the supporting area of the armrest for the arms is reduced, and the supporting effect is poor. The device comprises a base, a mounting block is rotationally arranged on the base, a groove is formed in the mounting block, a rotating rod is arranged on the mounting block, the two ends of the rotating rod are rotationally arranged on the outer walls of the two opposite sides of the groove respectively, and the handrail is fixedly arranged on the rotating rod. An adjusting assembly used for adjusting the rotating angle of the handrail is arranged in the mounting block.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of seat processing, specifically relates to a handrail for office chair. BACKGROUND

[0002] In order to improve the comfort of seat, the existing seat is generally equipped with handrail, in order to support the arm of user, improve the comfort of riding.

[0003] The prior art office chair, such as the utility model patent literature with the patent name "a mobile office chair" and the authorized announcement number "CN221153562U", discloses an office chair, which comprises an office chair body, universal wheels are arranged on the bottom of the office chair body for movement, fixed plates are symmetrically arranged on both sides of the bottom of the seat cushion of the office chair body, a rectangular box is arranged on the top of the fixed plate and placed outside the seat cushion of the office chair body, a screw rod is rotatably connected to the top of the rectangular box, a sliding plate is slidably connected to the rectangular box and threadedly connected with the screw rod, connecting rods are symmetrically arranged on the top of the sliding plate and pass through the top of the rectangular box, a support plate is arranged on the top of the connecting rod, a handrail is slidably connected to the top of the support plate, and a locking bolt is arranged on one side of the bottom of the support plate.

[0004] The office chair handrail of the above-mentioned patent can support the arm of the user, but since the arm supporting surface of the handrail is relatively horizontal with the ground, when the user changes the position of the arm, the supporting area of the arm by the handrail is reduced, which leads to that the handrail cannot give the user a good use experience. UTILITY MODEL CONTENTS

[0005] The utility model aims at the deficiency of prior art, and proposes a handrail for office chair, which is used for solving the technical problem that the office chair handrail of prior art can support the arm of user, but since the arm supporting surface of the handrail is relatively horizontal with the ground, when the user changes the position of the arm, the supporting area of the arm by the handrail is reduced, which leads to that the handrail cannot give the user a good use experience.

[0006] The above technical purpose of the utility model is realized by the following technical scheme:

[0007] A handrail for office chair, including base, the base is equipped with mounting block rotationally, the mounting block is equipped with recess, the mounting block is equipped with the rotation of the handle of the rod and the both ends of rotation are equipped with the rotation of the handle of the rod respectively on the outer wall of recess opposite sides, the rotation of the handle of the rod is fixed with the handle, the mounting block is equipped with the adjusting assembly for adjusting the rotation angle of the handle.

[0008] Working principle:

[0009] When the user needs to change the rotating angle of the handrail, the user can rotate the mounting block on the base, and the mounting block can drive the handrail to rotate, so as to change the rotating angle of the handrail; when the user needs to further expand the rotating angle of the handrail, the user can change the rotating angle of the handrail through the adjusting assembly, so as to further expand the rotating range of the handrail.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] First, the adjusting assembly is arranged, the handrail can be rotated around the rotating rod axis through the adjusting assembly, and the handrail is more fitted to the forearm of the user.

[0012] Second, the base and the mounting block are arranged, the rotating range of the handrail can be expanded through the rotation of the mounting block on the base, and the adjusting assembly is matched, so that different use scenes are adapted. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the utility model embodiment;

[0014] Figure 2 It is a structural schematic view of the base and the mounting block;

[0015] Figure 3 It is Figure 1 It is a sectional view schematic view of the structure of the middle A;

[0016] Figure 4 It is Figure 2 It is a sectional view schematic view of the structure of the middle B

[0017] The base 1, the mounting block 2, the recess 3, the rotating rod 4, the handrail 5, the mounting cavity 6, the ratchet 7, the fixed rod 8, the pawl 9, the first spring 10, the guide rail 11, the guide groove 12, the adjusting rod 13, the second spring 14, the cavity 15, the rotating shaft 16, the disc 17, the limiting groove 18, the through groove 19, the sliding ring 20, the limiting rod 21, the third spring 22. DETAILED DESCRIPTION

[0018] The technical scheme in the utility model will be further explained in combination with the drawings and the embodiments.

[0019] Embodiment:

[0020] For example Figure 2 And Figure 4As shown in the drawings, a handrail for an office chair, comprising a base 1, a mounting block 2 is rotatably arranged on the base 1, a cavity 15 is formed in the base 1, a rotating shaft 16 is fixedly arranged at the bottom of the mounting block 2 and slidably passes through the base 1 and is rotatably connected with the inner wall of the cavity 15, the rotating shaft 16 is arranged to facilitate the rotation of the mounting block 2 on the base 1, thereby expanding the rotation range of the handrail 5 on the mounting block 2, and a bearing is arranged at the rotatable connection between the rotating shaft 16 and the inner wall of the cavity 15.

[0021] As shown in the drawings, Figure 2 and Figure 4 a disc 17 is fixedly arranged on the rotating shaft 16, a plurality of limiting grooves 18 are uniformly formed in the circumferential outer wall of the disc 17, a through groove 19 is formed in the outer wall of the base 1, a sliding ring 20 is arranged in the cavity 15 and the end portion of the sliding ring 20 is slidably arranged on the through groove 19 and extends to the outside of the base 1, the through groove 19 is arranged to limit the movement direction of the sliding ring 20, a limiting rod 21 is fixedly arranged on the sliding ring 20 and is used to limit the rotation of the disc 17, the limiting rod 21 is arranged to prevent the rotation of the disc 17 by being deeply arranged in the limiting groove 18, thereby limiting the rotation of the rotating shaft 16 by limiting the rotation of the disc 17, a third spring 22 is fixedly arranged on the inner wall of the cavity 15 and the other end of the third spring 22 is fixedly arranged on the sliding ring 20, the third spring 22 is arranged in the cavity 15 to push the sliding ring 20, the sliding ring 20 can push the limiting rod 21, thereby the limiting rod 21 is in the limiting groove 18 in the natural state of the third spring 22, when the sliding ring 20 moves along the through groove 19, the sliding ring 20 moves and presses the third spring 22, thereby the limiting rod 21 on the sliding ring 20 exits from the limiting groove 18.

[0022] As shown in the drawings, Figure 1 and Figure 3 a recess 3 is formed in the mounting block 2, a rotating rod 4 is arranged on the mounting block 2 and the two ends of the rotating rod 4 are rotatably arranged on the opposite two sides of the outer wall of the recess 3, a handrail 5 is fixedly arranged on the rotating rod 4, the rotating rod 4 is arranged to facilitate the rotation of the handrail 5 in the recess 3, an adjusting assembly for adjusting the rotation angle of the handrail 5 is arranged in the mounting block 2, an installation cavity 6 is formed in the mounting block 2, one end of the rotating rod 4 slidably passes through the outer wall of the mounting block 2 and is rotatably connected with the inner wall of the installation cavity 6, the adjusting assembly is arranged in the installation cavity 6, the adjusting assembly comprises a ratchet wheel 7, a fixed rod 8, a pawl 9 and a first spring 10, the ratchet wheel 7 is fixedly arranged on the rotating rod 4, the fixed rod 8 is fixedly arranged in the installation cavity 6, the pawl 9 is rotatably arranged on the fixed rod 8 and the end portion of the pawl 9 abuts against the ratchet wheel 7, the cooperation between the pawl 9 and the ratchet wheel 7 can limit the angle of the rotated handrail 5, the first spring 10 is arranged in the installation cavity 6 and is used to push the pawl 9 to make the pawl 9 abut against the ratchet wheel 7, the first spring 10 is arranged to facilitate the pawl 9 to always abut against the ratchet wheel 7.

[0023] As shown in the drawings, Figure 1And Figure 3 As shown in the figure, the guide rail 11 is fixed on the inner wall of the mounting cavity 6, the guide groove 12 is arranged on the mounting block 2 and communicates with the inside of the mounting cavity 6, the adjusting rod 13 is slidably arranged on the guide groove 12 and slidably arranged in the guide rail 11, the movement direction of the adjusting rod 13 can be limited through the arrangement of the guide groove 12, the adjusting rod 13 is used for pushing the pawl 9 to make the end of the pawl 9 away from the ratchet wheel 7, the second spring 14 is arranged in the mounting cavity 6 and the two ends of the second spring 14 are fixed on the adjusting rod 13 and the inner wall of the mounting cavity 6 respectively, the second spring 14 is used for pushing the adjusting rod 13 to make it away from the pawl 9, the adjusting rod 13 is always away from the pawl 9 when the second spring 14 is in the natural state, and the second spring 14 changes from the natural state to the compressed state when the adjusting rod 13 moves and abuts against the pawl 9.

[0024] Working principle:

[0025] When the user needs to adjust the inclination angle of the handrail 5, the user moves the adjusting rod 13 along the guide groove 12, the adjusting rod 13 moves and compresses the second spring 14, and the adjusting rod 13 continues to move a distance after abutting against the pawl 9, so that the adjusting rod 13 pushes the pawl 9 away from the ratchet wheel 7, at this time, the handrail 5 can be freely rotated to the required angle around the axis of the rotating rod 4, and after the adjusting rod 13 is released, the adjusting rod 13 moves away from the pawl 9 under the action of the second spring 14, so that the pawl 9 loses the pushing of the adjusting rod 13, and the pawl 9 re-engages with the ratchet wheel 7 to complete the locking.

[0026] When the user needs to adjust the horizontal rotation angle of the handrail 5, the user moves the sliding ring 20 along the through groove 19, the sliding ring 20 pushes the third spring 22, the third spring 22 changes from the natural state to the compressed state, so that the limiting rod 21 at the bottom of the sliding ring 20 is separated from the limiting groove 18 on the disc 17, and then the user can rotate the mounting block 2 to the target position and release the sliding ring 20, the limiting rod 21 is inserted into the corresponding limiting groove 18 under the pushing of the third spring 22, and the rotation locking of the handrail 5 is realized.

[0027] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. An armrest for an office chair, characterized in that, The utility model provides a kind of adjustable handrail, including base (1), the mounting block (2) is rotatably equipped on the base (1), the recess (3) is opened in the mounting block (2), the rotating rod (4) is equipped on the mounting block (2) and rotating rod (4) both ends are rotatably equipped on the recess (3) opposite two sides outer wall, handrail (5) is fixedly equipped on the rotating rod (4), adjusting assembly for adjusting the rotating angle of handrail (5) is equipped in the mounting block (2).

2. An armrest for an office chair according to claim 1, characterized in that: The mounting block (2) is opened in the installation cavity (6), one end of the rotating rod (4) is slidably through the outer wall of the mounting block (2) and is rotatably connected with the inner wall of the installation cavity (6), and the adjusting assembly is arranged in the installation cavity (6).

3. An armrest for an office chair according to claim 2, characterized in that: The adjusting assembly includes a ratchet wheel (7), a fixed rod (8), a pawl (9) and a first spring (10), the ratchet wheel (7) is fixedly arranged on the rotating rod (4), the fixed rod (8) is fixedly arranged in the installation cavity (6), the pawl (9) is rotatably arranged on the fixed rod (8), and the end of the pawl (9) abuts against the ratchet wheel (7), and the first spring (10) is arranged in the installation cavity (6) and is used for pushing the pawl (9) to make the pawl (9) abut against the ratchet wheel (7).

4. An armrest for an office chair according to claim 3, characterized in that: The inner wall of the installation cavity (6) is fixedly provided with a guide rail (11), the mounting block (2) is opened with a guide groove (12) and the guide groove (12) is communicated with the inside of the installation cavity (6), the adjusting rod (13) is slidably arranged in the guide groove (12) and the guide groove (12) is slidably arranged in the guide rail (11), and the adjusting rod (13) is used for pushing the pawl (9) to make the end of the pawl (9) away from the ratchet wheel (7).

5. An armrest for an office chair according to claim 4, characterized in that: The second spring (14) is arranged in the installation cavity (6) and the two ends of the second spring (14) are fixedly arranged on the adjusting rod (13) and the inner wall of the installation cavity (6) respectively, and the second spring (14) is used for pushing the adjusting rod (13) to make it away from the pawl (9).

6. An armrest for an office chair according to claim 1, characterized in that: The inner wall of the installation cavity (6) is fixedly provided with a guide rail (11), the mounting block (2) is opened with a guide groove (12) and the guide groove (12) is communicated with the inside of the installation cavity (6), the adjusting rod (13) is slidably arranged in the guide groove (12) and the guide groove (12) is slidably arranged in the guide rail (11), and the adjusting rod (13) is used for pushing the pawl (9) to make the end of the pawl (9) away from the ratchet wheel (7).

7. An armrest for an office chair according to claim 6, characterized in that: The inner wall of the installation cavity (6) is fixedly provided with a guide rail (11), the mounting block (2) is opened with a guide groove (12) and the guide groove (12) is communicated with the inside of the installation cavity (6), the adjusting rod (13) is slidably arranged in the guide groove (12) and the guide groove (12) is slidably arranged in the guide rail (11), and the adjusting rod (13) is used for pushing the pawl (9) to make the end of the pawl (9) away from the ratchet wheel (7). The inner wall of the installation cavity (6) is fixedly provided with a guide rail (11), the mounting block (2) is opened with a guide groove (12) and the guide groove (12) is communicated with the inside of the installation cavity (6), the adjusting rod (13) is slidably arranged in the guide groove (12) and the guide groove (12) is slidably arranged in the guide rail (11), and the adjusting rod (13) is used for pushing the pawl (9) to make the end of the pawl (9) away from the ratchet wheel (7).

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