Office chair armrest lifting structure

Abstract

An office chair armrest lifting structure, comprising a support, a lifting pipe sleeved on the support and capable of lifting on the support, an armrest arranged on the lifting pipe, and a lifting structure. The lifting structure comprises a gear arranged in the lifting pipe, a swing member arranged in the support, a swing shaft and a swing member return spring, and a gear shaft closed loop sliding groove capable of sliding along the gear shaft on the swing member is arranged on the gear, so as to adjust the height of the armrest. Thus, unlike the conventional lifting armrest, the height of the armrest can be adjusted by pulling up or pressing down the armrest without unlocking the button in advance, so that the structure is reasonable, the operation is convenient, and the button operation is not required.

Description

Technical Field

[0001] This utility model relates to an office chair, and more particularly to the armrests of an office chair. Background Technology

[0002] We know that the most common function of office chair armrests is height adjustment. Currently, adjusting the height of these armrests typically requires pressing a button to unlock them before pulling or pressing the armrest up or down to adjust the height. Once adjusted, the button is released, as in the office chair armrest with patent publication number CN223041189U. How wonderful it would be to develop an armrest that can be adjusted in height without buttons! This is precisely the applicant's objective. Utility Model Content

[0003] The purpose of this invention is to provide a reasonably structured, easy-to-operate, button-free lifting mechanism for office chair armrests.

[0004] To solve the aforementioned technical problems, this utility model adopts the following technical solution:

[0005] An office chair armrest lifting structure includes a bracket, a lifting tube fitted onto the bracket and movable on the bracket, an armrest disposed on the lifting tube, and a lifting mechanism, wherein:

[0006] The lifting structure includes a shifting component disposed within the lifting tube and moving up and down with the lifting tube, a swinging component, a swinging shaft, and a swinging component return spring disposed within the bracket; the shifting component is provided with a closed-loop sliding groove for the shifting shaft, which includes multiple vertically arranged rack-shaped shifting grooves, an upper sliding channel for the shifting component connecting the shifting grooves, a lower sliding channel for the shifting component opposite to the shifting grooves and parallel to the lower sliding channel for the shifting component, and an upper inclined channel and a lower inclined channel connecting the upper and lower ends of the upper sliding channel and the lower sliding channel for the shifting component, respectively; the upper inclined channel and the lower inclined channel... The high points of the inclined channel are located at the upper and lower ends of the downward sliding channel of the gear component; the swing component is provided with a gear shaft that can slide along the closed-loop sliding groove of the gear shaft; the middle part of the swing component is oscillatingly connected to the bracket through the swing shaft; after the swing component is vertically aligned under the action of the swing component return spring, the axis of the gear shaft is always located on the straight line formed by connecting the bottoms of all the gear slots; when the gear component is lifted with the lifting tube, after the gear slot corresponding to the gear shaft slides out of the gear shaft, the next gear slot slides onto the gear shaft.

[0007] In the improved solution of the above-mentioned office chair armrest lifting structure, the positioning and reset spring of the stop component consists of two compression springs, which are respectively located on the upper and lower sides of the swing shaft.

[0008] In the improved solution of the above-mentioned office chair armrest lifting structure, the rack-shaped stop groove includes a horizontal upper groove wall, a downwardly inclined lower groove wall, and a semi-circular groove wall located between the upper groove wall and the lower groove wall.

[0009] In the improved solution of the above-mentioned office chair armrest lifting structure, a structure to prevent the stop from being pulled upward is provided between the stop component and the bracket.

[0010] In the improved solution of the above-mentioned office chair armrest lifting structure, the anti-pull-out structure of the stop component includes a first stop hook provided on the stop component and a limiting component with a second stop hook provided in the bracket.

[0011] Compared with the prior art, the advantages of this utility model are as follows: Since the lifting structure includes a stop component in the lifting tube, and a swing component, a swing shaft and a swing component return spring in the bracket, and the stop component is provided with a stop shaft closed-loop slide groove that can slide along the stop shaft on the swing component, the height of the handrail can be adjusted. This eliminates the need to press a button to unlock the handrail before raising or lowering it to adjust the height, as is the case with traditional lifting handrails. Therefore, the structure of this utility model is reasonable, the operation is convenient and no button operation is required.

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: Attached Figure Description

[0013] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0014] Figure 2 This is a structural schematic diagram of an embodiment of the present utility model;

[0015] Figure 3 yes Figure 2 A magnified view of part I;

[0016] Figure 4 This is an assembly diagram of an embodiment of the present invention. Figure 1 ;

[0017] Figure 5 This is an assembly diagram of an embodiment of the present invention. Figure 2 ;

[0018] Figure 6 This is a three-dimensional schematic diagram of the gear shift component according to an embodiment of the present utility model. Detailed Implementation

[0019] An office chair armrest lifting structure, such as Figures 1 to 6 As shown, it includes a bracket 1, a lifting tube 2 fitted onto the bracket 1 and capable of moving up and down on the bracket 1, a handrail 3 provided on the lifting tube 2, and a lifting structure 4, wherein:

[0020] The lifting structure 4 includes a gear shifting component 41 disposed in the lifting tube 2 and moving up and down with the lifting tube 2, a swinging component 42, a swinging shaft 43, and a swinging component return spring 44 disposed in the bracket 1; the gear shifting component 41 is provided with a gear shifting shaft closed-loop sliding groove 411, which includes a plurality of vertically arranged rack-shaped gear shifting grooves 4111, a gear shifting component upper sliding channel 4112 connecting the gear shifting grooves 4111, a gear shifting component lower sliding channel 4113 opposite to the gear shifting grooves 4111 and parallel to the gear shifting component lower sliding channel 4112, and an upper inclined channel 4114 and a lower inclined channel 4115 connecting the upper end and lower end of the gear shifting component upper sliding channel 4112 and the gear shifting component lower sliding channel 4113, respectively; the upper inclined channel 4114 and the lower inclined channel 4115... The high points of the channel 4115 are located at the upper and lower ends of the downward channel 4113 of the gear shift component; the swing component 42 is provided with a gear shaft 421 that can slide along the closed-loop sliding groove 411 of the gear shaft; the middle part of the swing component 42 is oscillatingly connected to the bracket 1 through the swing shaft 43; after the swing component 42 is vertically aligned under the action of the swing component return spring 44, the axis of the gear shaft 421 is always located on the straight line formed by connecting the bottoms of all the gear slots 4111; when the gear shift component 41 is lifted with the lifting tube 2, after the gear slot 4111 corresponding to the gear shaft 421 slides out of the gear shaft 41, the next gear slot 4111 slides onto the gear shaft 421, realizing the lifting of the handrail to the next level.

[0021] When adjusting the armrest height of an office chair equipped with this utility model, the hand is usually held on the armrest to lift it. This causes the lifting tube 2 to slide the stop component 41 upwards, while the swing component 42 swings slightly at a small angle. This causes one stop groove 4111 on the stop component 41 to slide away from the stop shaft 421, and then the next stop groove 4111 slides onto the stop shaft 421, thus raising the armrest to the next level and adjusting the armrest height. As the handrail continues to rise, when the lowest gear slot 4111 slides onto the gear shaft 421, the handrail reaches its highest position. If the handrail continues to rise, causing the lowest gear slot 4111 to slide out of the gear shaft 421, the lower part of the downward channel 4115 slides upward along the gear shaft 421. Then, under the action of the handrail's gravity, the handrail automatically descends by sliding down the gear shaft 421 via the gear component's downward channel 4113 until it stops when the gear shaft 421 blocks the uppermost end of the gear component's downward channel 4113. At this point, the handrail is in its lowest position. Next, if you want to raise the handrail, you can pull it up so that the upward channel 4114 slides down the gear shaft 421. Then, the upper end of the gear sliding channel 4112 slides a short distance along the gear shaft. When the uppermost gear slot 4111 slides down onto the gear shaft 421, the first level of lifting of the handrail is completed. At this time, you can continue to lift the handrail to raise it step by step, thereby realizing the height adjustment of the handrail.

[0022] As can be seen from the above, since the lifting structure 4 includes a stop component 41 provided in the lifting tube 2, and a swing component 42, a swing shaft 43 and a swing component return spring 44 provided in the bracket 1, and the stop component 41 is provided with a stop shaft closed-loop slide groove 411 that can slide along the stop shaft 421 on the swing component 42, the height of the handrail can be adjusted. In this way, unlike the traditional lifting handrail, it is not necessary to press the button to unlock before the handrail can be raised or lowered to adjust the height. Therefore, the structure of this utility model is reasonable, the operation is convenient, and no button operation is required.

[0023] In this embodiment, the gear shifting component alignment and reset spring 44 consists of two compression springs, which are respectively disposed on the upper and lower sides of the swing shaft 43 to keep the gear shifting component aligned.

[0024] In this embodiment, the rack-shaped gear groove 4111 includes a horizontal upper groove wall 41111, a downwardly inclined lower groove wall 41112, and a semi-circular groove wall 41113 located between the upper groove wall 41111 and the lower groove wall 41112. This allows the previous gear groove 4111 to slide out along the gear shaft 421 when the handrail is raised, so that the next gear groove 4111 can slide onto the gear shaft 421. It also prevents the previous gear groove from sliding onto the gear shaft 421 after the gear groove 4111 on the gear shaft 421 slides out, thereby ensuring the reliability of the handrail lifting adjustment.

[0025] Preferably, an anti-pull-out structure 5 is provided between the stop member 41 and the bracket 1 to prevent the stop member from being pulled upwards. In this embodiment, as shown... Figure 4 , 5 As shown, the anti-pull-out structure 5 for the gear shift 41 includes a first hook 51 on the gear shift 41 and a limiting member 52 with a second hook 521 in the bracket 1. During installation, the lifting tube 2 with the gear shift 41 is first fitted onto the bracket 1. Then, the limiting member 52 is inserted from the bottom of the bracket 1. When the second hook 521 touches the first hook 51, it will slightly deform elastically, allowing the limiting member 52 to slide smoothly into the bracket 1. Then, it is fixed with screws 6. Figure 6 As shown. Of course, the anti-pulling mechanism 5 can also be other structures, such as a stop pin.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation and positional relationship shown in the drawings or the installation and use method of the product as the reference orientation of the drawings. These are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the content of the patent application of the present utility model shall fall within the technical scope of the present utility model.

Claims

1. A lifting structure for an office chair armrest, comprising a bracket, a lifting tube fitted onto the bracket and movable on the bracket, an armrest disposed on the lifting tube, and a lifting structure, characterized in that: The lifting structure includes a gear component installed in the lifting tube and moving up and down with the lifting tube, and a swing component, a swing shaft and a swing component return spring installed in the bracket. The gear shift component is provided with a closed-loop sliding groove for the gear shift shaft, which includes multiple vertically arranged rack-shaped gear shift grooves, an upper sliding channel for the gear shift component connecting the gear shift grooves, a lower sliding channel for the gear shift component opposite to the gear shift groove and parallel to the lower sliding channel for the gear shift component, and an upper inclined channel and a lower inclined channel connecting the upper and lower ends of the upper sliding channel and the lower sliding channel for the gear shift component, respectively; the height of the upper inclined channel and the lower inclined channel are located at the upper and lower ends of the lower sliding channel for the gear shift component, respectively; the swing component is provided with a gear shift shaft that can slide along the closed-loop sliding groove for the gear shift shaft; the middle part of the swing component is oscillatingly connected to the bracket through the swing shaft; after the swing component is vertically aligned under the action of the swing component return spring, the axis of the gear shift shaft is always located on the straight line formed by connecting the bottoms of all the gear shift grooves; when the gear shift component is lifted with the lifting tube, after the gear shift groove corresponding to the gear shift shaft slides out of the gear shift shaft, the next gear shift groove slides onto the gear shift shaft.

2. The office chair armrest lifting structure according to claim 1, characterized in that: The shifting and resetting spring consists of two compression springs, which are respectively located on the upper and lower sides of the swing shaft.

3. The office chair armrest lifting structure according to claim 1, characterized in that: The rack-shaped stop groove includes a horizontal upper groove wall, a downwardly inclined lower groove wall, and a semi-circular groove wall located between the upper groove wall and the lower groove wall.

4. The office chair armrest lifting structure according to any one of claims 1 to 3, characterized in that: A structure is provided between the gear shift component and the bracket to prevent the gear shift component from being pulled upwards.

5. The office chair armrest lifting structure according to claim 4, characterized in that: The structure for preventing the gear shift from being pulled out upwards includes a first stop hook on the gear shift and a limiting member with a second stop hook in the bracket.

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