Handrail assembly

Abstract

The handrail assembly comprises a supporting part, a first sliding block, an angle adjusting base, a rotary adjusting base, a second sliding block and an installation column, the lower end of the second sliding block is installed in the installation column in a lifting mode, and the rotary adjusting base is rotatably installed at the upper end of the second sliding block. An angle locking device is arranged in the angle adjusting base, the rotary adjusting base penetrates through the angle adjusting base to be connected with the angle locking device, so that the angle adjusting base can conduct pitching angle adjustment relative to the rotary adjusting base, and the first sliding block is installed in the supporting part in a sliding mode; the angle adjusting base penetrates through the supporting part to be connected with the first sliding block. The structure of the armrest assembly is improved, so that the armrest assembly has more abundant position adjusting functions.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to an armrest assembly. Background Art

[0002] In a modern office environment, an office chair is an indispensable device for long - term work, and the humanized design and comfort of its design directly affect the health and work efficiency of users. Among them, the armrest, as an important part of the office chair, not only provides arm support for users, reduces the pressure on the shoulders, necks and backs during long - term keyboard operation or writing, but also improves the overall sitting posture experience through reasonable design.

[0003] The armrest design of traditional office chairs often adopts a fixed or simple adjustable type, such as only being able to achieve lifting adjustment in a single direction to meet the basic needs of users of different heights for the armrest height. However, with the increasing requirements for office comfort, this basic adjustment function is difficult to meet diverse usage scenarios and personal preferences. For example, when conducting meeting discussions, using a computer, reading or resting and other different activities, users have different requirements for the position, angle and shape of the armrest. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the above - mentioned technical problems and provide an armrest assembly. The application aims to improve the structure of the armrest assembly so that it has a more abundant position adjustment function.

[0005] An armrest assembly includes a support part, a first slider, an angle adjustment base, a rotation adjustment base, a second slider and a mounting post. The lower end of the second slider is installed in the mounting post in a lift - able manner. The rotation adjustment base is rotatably installed at the upper end of the second slider. An angle locking device is arranged in the angle adjustment base. The rotation adjustment base passes through the angle adjustment base and is connected with the angle locking device, so that the angle adjustment base can perform pitching angle adjustment relative to the rotation adjustment base. The first slider is slidably installed in the support part, and the angle adjustment base passes through the support part and is connected with the first slider.

[0006] According to the armrest assembly of the present application, through the structural improvement of the armrest assembly, the armrest has multiple position adjustment functions such as front-back sliding adjustment, pitch angle adjustment, rotation adjustment, and lifting adjustment, enabling the user to adjust the position of the support part of the armrest according to their own needs; the first slider slides in the support part to form the front-back sliding adjustment, the rotation adjustment base and the angle locking device cooperate to achieve the adjustment and locking of the pitch angle of the support part, the rotation adjustment base and the upper end of the second slider cooperate to achieve the rotation adjustment of the support part, the lower end of the second slider and the mounting column cooperate to achieve the lifting adjustment of the support part, and the various adjustment structures are interconnected, and the functions of the various adjustment structures do not interfere with each other, and can also enable the various structures to be assembled to form an armrest assembly, so as to be installed on the seat through the mounting column.

[0007] Further, it further includes a lifting locking device. The lower end of the second slider is provided with a mounting groove, the lifting locking device is installed in the mounting groove, and a first rack engaged with the lifting locking device is provided on the inner side wall of the mounting column. The lifting locking device can cooperate with the first rack to lock the rising height of the second slider.

[0008] Still further, the lifting locking device includes a first tooth, a pressing block, and a first return spring. The first return spring presses against the first tooth and the wall of the mounting groove respectively. An upper trigger block and a lower trigger block arranged up and down are further provided on the inner side wall of the mounting column. As the second slider rises, the lifting locking device reaches the state where the pressing block abuts against the upper trigger block, the pressing block presses down the first tooth, causing it to disengage from the contact with the first rack, and the first return spring is compressed. The second slider can freely slide up and down in the mounting column. As the second slider descends, the lifting locking device reaches the state where the pressing block abuts against the lower trigger block, the pressing block is lifted, the first return spring acts on the first tooth to reset, and it engages with the first rack, and the second slider can only be pulled up unidirectionally. When the second slider rises to the highest position, the lifting locking device can be triggered, and the second slider can freely slide up and down. When the second slider descends to the lowest position, the lifting locking device can be triggered to reset, and the second slider can be pulled up unidirectionally and the pulled-up height can be locked.

[0009] Still further, the upper trigger block and the lower trigger block and the first rack are respectively arranged on two opposite inner side walls of the mounting column.

[0010] Still further, it further includes a rotation positioning device. The upper end of the second slider is provided with a positioning groove, the rotation positioning device is installed in the positioning groove, the rotation adjustment base is provided with a plurality of positioning points, and the positioning points cooperate with the rotation positioning device to position its position when the rotation adjustment base rotates. The rotation positioning device provides positioning for the rotation of the armrest to prevent the support part from rotating disorderly.

[0011] Furthermore, a rotating post and a limiting post are provided at the upper end of the second slider. A rotating groove and a limiting groove are provided on the rotary adjustment base. A wear-resistant rubber ring is provided in the rotating groove. The limiting post is inserted into the rotating groove to rotate, and the limiting post is inserted into the limiting groove for limiting. The wear-resistant rubber ring can improve the wear resistance between the rotary adjustment base and the rotating post, thereby increasing the service life of the product. The limiting post and the limiting groove cooperate to limit the rotation angle of the rotary adjustment and prevent excessive rotation.

[0012] Furthermore, the angle locking device includes a main body, a second tooth and a second return spring. A second rack engaged with the second tooth is provided on the inner side wall of the angle adjustment base.

[0013] Furthermore, a stepped groove is provided on the main body. A first stepped level and a second stepped level are provided in the stepped groove. The first stepped level is higher than the second stepped level. The second tooth is installed in the stepped groove through a pin. The second return spring presses against the second tooth and the main body respectively. A front trigger block and a rear trigger block are further provided on the inner side wall of the angle adjustment base. When the angle adjustment base slides clockwise until the second tooth or the pin abuts against the rear trigger block, the pin is pushed onto the first stepped level. The second return spring restricts the second tooth and the pin on the first stepped level. The second tooth is disengaged from contact with the second rack. The angle adjustment base slides freely. When the angle adjustment base slides counterclockwise until the second tooth or the pin abuts against the front trigger block, the pin is pushed onto the second stepped level. The second return spring restricts the second tooth and the pin on the second stepped level. The second tooth engages with the second rack. The angle adjustment base can only be adjusted in the clockwise direction. When the angle adjustment base rotates clockwise so that the second tooth or the pin abuts against the rear trigger block, the second tooth is lifted by the rear trigger block, thereby pushing the pin onto the first stepped level, causing the second tooth and the second rack to disengage from each other. In this way, the support part can freely adjust the pitching angle. When the angle adjustment base rotates counterclockwise so that the second tooth or the pin abuts against the front trigger block, the pin is pushed onto the second stepped level, and the second tooth engages with the second rack. The support part can only be adjusted in the clockwise direction and the pitching adjustment angle is locked.

[0014] Furthermore, the angle adjustment base is provided with a first connection groove, and the rotary adjustment base is provided with a fixing post. The fixing post passes through the first connection groove and is connected to the angle locking device.

[0015] Furthermore, a sliding groove and a second connection groove are provided on the support part. A limiting point is provided on the first slider. The limiting point is accommodated in the sliding groove to slide. The angle adjustment base passes through the second connection groove and is connected to the first slider. The limiting point can prevent the support part and the first slider from shaking when sliding back and forth. Description of the Drawings

[0016] Figure 1 This is a perspective view of the armrest assembly of the present utility model.

[0017] Figure 2 This is an exploded view of the second slider and the mounting post of the present utility model.

[0018] Figure 3 This is a perspective view of some of the mounting posts of the present utility model.

[0019] Figure 4 This is an exploded view of the rotary adjustment base, the second slider, and the mounting post of the present utility model.

[0020] Figure 5 This is an exploded view of the angle adjustment base, the angle locking device, the rotary adjustment base, and the second slider of the present utility model.

[0021] Figure 6 This is an exploded view of the support part, the first slider, and the angle adjustment base of the present utility model.

[0022] Figure 7 This is a cross-sectional view of the armrest assembly of the present utility model.

[0023] Figure 8 is Figure 7 a partial enlarged view of.

[0024] Figure 9 This is an exploded view of the armrest assembly of the present utility model. Detailed implementation manners

[0025] An armrest assembly of the present utility model will be described in conjunction with the accompanying drawings.

[0026] As Figures 1 to 9An armrest assembly as shown enables the armrest to have multiple position adjustment functions such as front-back sliding adjustment, pitch angle adjustment, rotation adjustment, and lifting adjustment through structural improvement of the armrest assembly, allowing users to adjust the position of the support part 1 of the armrest according to their own needs; the specific structure includes a support part 1, a first slider 2, an angle adjustment base 3, a rotation adjustment base 4, a second slider 5, and a mounting post 6. The lower end of the second slider 5 is installed in the mounting post 6 in a liftable manner, so that the lower end of the second slider 5 and the mounting post 6 cooperate to achieve the lifting adjustment of the support part 1; the rotation adjustment base 4 is rotatably installed on the upper end of the second slider 5, so that the rotation adjustment base 4 and the upper end of the second slider 5 cooperate to achieve the rotation adjustment of the support part 1; an angle locking device 7 is provided in the angle adjustment base 3, and the rotation adjustment base 4 passes through the angle adjustment base 3 and is connected to the angle locking device 7, enabling the angle adjustment base 3 to perform pitch angle adjustment relative to the rotation adjustment base 4, so that the rotation adjustment base 4 and the angle locking device 7 cooperate to achieve the pitch angle adjustment and angle locking of the support part 1; the first slider 2 is slidably installed in the support part 1, and the angle adjustment base 3 passes through the support part 1 and is connected to the first slider 2. The first slider 2 slides in the support part 1 to form the front-back sliding adjustment of the support part 1; the various adjustment structures are connected to each other, and the functions of the various adjustment structures do not interfere with each other, and the various structures can also be assembled to form an armrest assembly, which is then installed on the seat through the mounting post 6.

[0027] As Figure 2 and Figure 3 shown, it further includes a lift locking device 8. The lower end of the second slider 5 is provided with a mounting groove 51, and the lift locking device 8 is installed in the mounting groove 51. A first rack 611 cooperating with the lift locking device 8 is provided on the inner side wall of the mounting post 6.

[0028] As Figure 2 and Figure 3 shown, the lift locking device 8 includes a first locking tooth 81, a pressing block 82, and a first return spring. The first locking tooth 81 is rotatably installed on the mounting groove 51 through a rotating shaft. Preferably, the first locking tooth 81 and the mounting groove 51 are correspondingly provided with groove bodies for installing the first return spring, so that the first return spring stably presses against the first locking tooth 81 and the wall of the mounting groove 51 respectively. The pressing block 82 is slidably installed on the mounting groove 51. The surface of the pressing block 82 facing the first locking tooth 81 is set as an arc surface, and the corresponding surface of the first locking tooth 81 is also set as an arc, so as to facilitate the pressing block 82 to push the first locking tooth 81 to rotate.

[0029] As Figure 2As shown, on the inner side wall of the mounting post 6, there are also an upper trigger block 622 and a lower trigger block 621 arranged vertically. As the lifting and locking device 8 rises with the second slider 5 until the pressing block 82 abuts against the upper trigger block 622, the pressing block 82 presses down the first locking tooth 81, enabling the first locking tooth 81 to rotate around the rotating shaft, causing it to disengage from the contact with the first rack 611. The first return spring is compressed, and the second slider 5 can freely slide up and down within the mounting post 6. As the lifting and locking device 8 descends with the second slider 5 until the pressing block 82 abuts against the lower trigger block 621, the pressing block 82 is lifted. The first return spring acts on the first locking tooth 81 to reset it and engage with the first rack 611. The second slider 5 can only be pulled upward unidirectionally. When adjusting the height of the support portion 1, the support portion 1 drives the second slider 5 to gradually move upward along the first rack 611. Under the locking action of the first locking tooth 81 and the first return spring, the support portion 1 can be locked at the height of each tooth of the first rack 611. When the support portion 1 rises to the highest position, it can freely slide down and slide to the lowest position to abut against the lower trigger block 621, and then the height of the support portion 1 can be adjusted upward step by step again.

[0030] The upper trigger block 622 and the lower trigger block 621 and the first rack 611 are respectively arranged on two opposite inner side walls of the mounting post 6. As Figure 2 and Figure 3 shown, the mounting post 6 includes a first column body 62 and a second column body 61. Among them, the upper trigger block 622 and the lower trigger block 621 are arranged on the first column body 62, and the first rack 611 is arranged on the second column body 61. On the inner side wall of the second column body 61, there is also a guiding block 612. The second slider 5 is provided with a guiding groove 53. The guiding block 612 and the guiding groove 53 cooperate to guide the lifting of the second slider 5. In addition, in order to enable the second slider 5 to be adjusted more stably with the mounting post 6, a guiding sleeve 52 is also provided. The guiding sleeve 52 and the second slider 5 are connected by screws. The guiding sleeve 52 is sleeved on the outside of the mounting post 6 and rises and falls synchronously when the second slider 5 rises and falls, so that the lifting and adjusting structure can be more stable.

[0031] As Figure 4 and Figure 5 shown, it further includes a rotation positioning device. At the upper end of the second slider 5, there is a positioning groove 56. The rotation positioning device is installed in the positioning groove 56. The rotation adjustment base 4 is provided with a plurality of positioning points 44. The positioning points 44 cooperate with the rotation positioning device to position its position when the rotation adjustment base 4 rotates, providing positioning for the rotation of the armrest through the rotation positioning device to avoid disorderly rotation of the support portion 1.

[0032] As Figure 4 and Figure 5As shown, a rotating column 54 and a limiting column 55 are provided at the upper end of the second slider 5. A rotating groove 41 and a limiting groove 43 are provided on the rotating adjustment base 4. An abrasion-resistant rubber ring 42 is provided in the rotating groove 41. The abrasion-resistant rubber ring 42 is a TPE rubber ring. The TPE rubber ring can bring appropriate damping feeling to the rotation adjustment, improve the abrasion resistance and service life between the rotating adjustment base 4 and the rotating column 54. The limiting column 55 is inserted into the rotating groove 41 for rotation, and the limiting column 55 is inserted into the limiting groove 43 for limiting. The cooperation of the limiting column 55 and the limiting groove 43 limits the rotation angle to avoid excessive rotation.

[0033] As Figure 4 and Figure 5 shown, the rotating column 54 is arranged in the middle of the rotating adjustment base 4, the limiting columns 55 are arranged on both sides of the rotating column 54, and a positioning groove 56 is arranged on the outside of the limiting columns 55. The rotating groove 41, the limiting groove 43 and the positioning point 44 are arranged in cooperation. The rotation positioning device is a positioning ball, including a spring and a positioning ball. The spring is accommodated in the positioning groove 56, and the positioning ball is accommodated at the notch of the positioning groove 56. The spring provides elastic support for the positioning ball, so that the positioning ball can cooperate with the positioning point 44 for positioning.

[0034] As Figures 5 to 9 shown, the angle locking device 7 includes a main body 71, a second tooth 72 and a second return spring. A second rack 31 cooperating with the second tooth 72 is provided on the inner side wall of the angle adjustment base 3.

[0035] As Figures 5 to 9As shown, a receiving groove is provided inside the main body 71. Step grooves 711 are provided on both sides of the receiving groove. A first-level step 712 and a second-level step 713 are provided in the step groove 711. The first-level step 712 is higher than the second-level step 713. The second locking tooth 72 is installed in the step groove 711 through a pin 73. The second return spring is respectively pressed against the second locking tooth 72 and the main body 71. The inner side wall of the angle adjustment base 3 is further provided with a front trigger block 33 and a rear trigger block 32. When the angle adjustment base 3 slides clockwise until the second locking tooth 72 or the pin 73 abuts against the rear trigger block 32, the pin 73 is pushed onto the first-level step 712. The second return spring restricts the second locking tooth 72 and the pin 73 on the first-level step 712. The second locking tooth 72 disengages from contact with the second rack 31, and the angle adjustment base 3 can slide freely. When the angle adjustment base 3 slides counterclockwise until the second locking tooth 72 or the pin 73 abuts against the front trigger block 33, the pin 73 is pushed onto the second-level step 713. The second return spring restricts the second locking tooth 72 and the pin 73 on the second-level step 713. The second locking tooth 72 engages with the second rack 31, and the angle adjustment base 3 can only be adjusted in the clockwise direction. When adjusting the pitching angle of the support part 1, the support part 1 drives the angle adjustment base 3 to rotate clockwise. The pin 73 is pressed against the second-level step 713 by the second return spring. Under the locking action of the second locking tooth 72 and the second return spring, the support part 1 can be locked at the pitching angle corresponding to each tooth of the second rack 31. When the support part 1 is raised to the highest position, the rear trigger block 32 and the second return spring cooperate to press the pin 73 against the first-level step 712, and the support part 1 can freely perform pitching adjustment. When it pitches down to the lowest position and triggers the front trigger block 33, the pitching angle of the support part 1 can be adjusted upward step by step again.

[0036] As Figures 5 to 9 shown, the rear trigger block 32 is a convex block provided at the rear side of the second rack 31. The rear trigger block 32 abuts against the second locking tooth 72, causing the pin 73 to be pushed onto the first-level step 712. The front trigger block 33 is the inner wall of a groove on the inner side surface of the angle adjustment base 3. The front trigger block 33 directly abuts against the pin 73, causing the pin 73 to be pushed onto the second-level step 713. A socket column is provided on the second locking tooth 72 for the second return spring to be socket-mounted, so that the second return spring can stably press the second locking tooth 72 at both the position of the first-level step 712 or the second-level step 713. The angle adjustment base 3 is provided with a first connection groove 34. The rotation adjustment base 4 is provided with a fixing column 45. The fixing column 45 passes through the first connection groove 34 and is connected to the angle locking device 7. The fixing column 45 is a screw fixing column, and the angle locking device 7 and the fixing column 45 can be connected and fixed by screws.

[0037] As Figure 9As shown, a sliding groove 11 and a second connection groove 12 are provided on the support portion 1. A limiting point 21 is provided on the first slider 2. Each sliding groove 11 corresponds to at least two limiting points 21. The limiting points 21 are accommodated to slide in the sliding groove 11. The cooperation between the limiting points 21 and the sliding groove 11 can limit the distance of the forward and backward sliding of the support portion 1, and can also prevent shaking between the support portion 1 and the first slider 2. The angle adjustment base 3 passes through the second connection groove 12 to connect the first slider 2.

[0038] According to the disclosure and teaching of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. An armrest assembly, characterized in that, It includes a support part, a first slider, an angle adjustment base, a rotation adjustment base, a second slider and a mounting post. The lower end of the second slider is installed in the mounting post in a vertically movable manner. The rotation adjustment base is rotatably installed on the upper end of the second slider. An angle locking device is provided in the angle adjustment base. The rotation adjustment base passes through the angle adjustment base and is connected to the angle locking device, enabling the angle adjustment base to perform pitch angle adjustment relative to the rotation adjustment base. The first slider is slidably installed in the support part. The angle adjustment base passes through the support part and is connected to the first slider.

2. The armrest assembly according to claim 1, characterized in that, It further includes a lifting locking device. An installation groove is provided at the lower end of the second slider. The lifting locking device is installed in the installation groove. A first rack that cooperates with the lifting locking device is provided on the inner side wall of the mounting post.

3. The armrest assembly according to claim 2, wherein, The lifting locking device includes a first tooth, a pressing block and a first return spring. The first return spring presses against the first tooth and the wall of the installation groove respectively. An upper trigger block and a lower trigger block arranged vertically are further provided on the inner side wall of the mounting post. As the second slider rises until the pressing block abuts against the upper trigger block, the pressing block presses down the first tooth, causing it to disengage from the contact with the first rack. The first return spring is compressed, and the second slider can freely slide up and down in the mounting post. As the second slider descends until the pressing block abuts against the lower trigger block, the pressing block is lifted. The first return spring acts on the first tooth to reset it, and it engages with the first rack. The second slider can only be pulled up unidirectionally.

4. The armrest assembly according to claim 3, wherein, The upper trigger block and the lower trigger block and the first rack are respectively arranged on two opposite inner side walls of the mounting post.

5. The armrest assembly according to claim 1, characterized in that, It further includes a rotation positioning device. A positioning groove is provided at the upper end of the second slider. The rotation positioning device is installed in the positioning groove. The rotation adjustment base is provided with a plurality of positioning points. The positioning points cooperate with the rotation positioning device to position its position when the rotation adjustment base rotates.

6. The armrest assembly according to claim 1, wherein A rotating column and a limiting column are provided at the upper end of the second slider. A rotating groove and a limiting groove are provided on the rotation adjustment base. A wear-resistant rubber ring is provided in the rotating groove. The limiting column is inserted into the rotating groove to rotate, and the limiting column is inserted into the limiting groove to be limited.

7. The armrest assembly according to claim 1, wherein The angle locking device includes a main body, a second tooth and a second return spring. A second rack that cooperates with the second tooth is provided on the inner side wall of the angle adjustment base.

8. The armrest assembly according to claim 7, wherein A stepped groove is provided on the main body. A first - stage step and a second - stage step are provided in the stepped groove. The first - stage step is higher than the second - stage step. The second latch is installed in the stepped groove through a pin. The second return spring abuts against the second latch and the main body respectively. A front trigger block and a rear trigger block are further provided on the inner side wall of the angle - adjusting base. When the angle - adjusting base slides clockwise until the second latch or the pin abuts against the rear trigger block, the pin is pushed onto the first - stage step. The second return spring restricts the second latch and the pin on the first - stage step. The second latch disengages from the second rack, and the angle - adjusting base slides freely. When the angle - adjusting base slides counterclockwise until the second latch or the pin abuts against the front trigger block, the pin is pushed onto the second - stage step. The second return spring restricts the second latch and the pin on the second - stage step. The second latch engages with the second rack, and the angle - adjusting base can only be adjusted in the clockwise direction.

9. The armrest assembly according to claim 1, wherein The angle - adjusting base is provided with a first connection groove. The rotation - adjusting base is provided with a fixing post. The fixing post passes through the first connection groove and is connected to the angle - locking device.

10. The armrest assembly according to claim 1, wherein, The support part is provided with a sliding groove and a second connection groove. The first slider is provided with a limiting point. The limiting point is accommodated to slide in the sliding groove. The angle - adjusting base passes through the second connection groove and is connected to the first slider.

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