Office chair armrest lifting structure

Abstract

An office chair armrest lifting structure, including sleeve, sleeve in the sleeve and can be lifted in the lifting pipe, lifting structure, connected to the upper end of the armrest of the lifting pipe. Wherein, the lifting structure includes the gear block provided in the lifting pipe, the gear block right reset spring and the gear shaft, and the gear shaft closed loop sliding groove provided in the sleeve, the gear shaft closed loop sliding groove can be circulated sliding for the gear shaft, so as to adjust the armrest to the appropriate height, so as to not like the traditional lifting armrest must press the button button unlocking after can pull up or down the armrest to adjust the height, therefore, the structure of the utility model is reasonable, convenient to operate, without button operation.

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 sleeve, a lifting tube fitted inside the sleeve and movable within the sleeve, a lifting structure, and an armrest connected to the upper end of the lifting tube, wherein:

[0006] The lifting structure includes a gear block, a gear block alignment and return spring, and a gear shaft disposed in the lifting tube, and a closed-loop slide groove for the gear shaft disposed in the sleeve; the closed-loop slide groove for the gear shaft includes multiple vertically arranged rack-shaped gear slots, an upper sliding channel for the gear shaft connecting the gear slots, a lower sliding channel for the gear shaft opposite to the gear slots and parallel to the upper sliding channel for the gear shaft, 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 shaft, respectively; the gear block is vertically arranged. One end of the gear shaft is oscillatingly connected to the lifting tube, and the other end is oscillating and reset by the gear block oscillating and resetting spring. After the gear shaft is installed in the gear block, its end can slide cyclically along the closed-loop slide groove of the gear shaft. After the gear block is vertically oscillating under the action of the gear block oscillating and resetting spring, the gear shaft is always located at the straight line formed by connecting the bottoms of all the gear slots. When the handrail is lifted upward, the gear shaft 33 slides out from one of the gear slots and slides along a short section of the gear shaft sliding channel 342 before sliding down into the next gear slot.

[0007] In the improved solution of the above-mentioned office chair armrest lifting structure: the positioning and reset spring of the gear block is two compression springs, which are located on both sides of the vertical center line of the gear block.

[0008] In the improved solution of the above-mentioned office chair armrest lifting structure: the rack-shaped stop groove includes an upwardly inclined upper groove wall, a horizontal 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: the sleeve includes a sleeve body and a side cover covering the opening groove of the sleeve body; there are two sets of closed-loop sliding grooves for the gear shaft, which are respectively provided in the sleeve body and the side cover; the two ends of the gear shaft can simultaneously slide cyclically along the closed-loop sliding grooves of the gear shaft in the sleeve body and the side cover.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: Since the lifting structure includes a gear block, a gear block alignment and reset spring and a gear shaft provided in the lifting tube, and a gear shaft closed-loop slide groove provided in the sleeve, the gear shaft closed-loop slide groove can allow the gear shaft to slide cyclically, thereby adjusting the handrail to a suitable height. In this way, unlike traditional lifting handrails, it is not necessary to press a button to unlock before raising or lowering the handrail to adjust the height. Therefore, the structure of this utility model is reasonable, the operation is convenient, and no button operation is required.

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present utility model. Figure 1 (Side cover not installed);

[0013] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 1 ;

[0014] Figure 3 yes Figure 2 A magnified view of part I;

[0015] Figure 4 This is a three-dimensional schematic diagram of an embodiment of the present utility model. Figure 2 (Side cover not installed);

[0016] Figure 5 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 2 ;

[0017] Figure 6 yes Figure 5 A magnified view of part II;

[0018] Figure 7 This is an assembly diagram of an embodiment of the present invention;

[0019] Figure 8 This is a front view of the sleeve body according to an embodiment of the present utility model;

[0020] Figure 9 This is a perspective view of the side cover of an embodiment of the present utility model. Detailed Implementation

[0021] An office chair armrest lifting structure, such as Figures 1 to 9 As shown, it includes a sleeve 1, a lifting pipe 2 that is fitted inside the sleeve 1 and can move up and down within the sleeve 1, a lifting structure 3, and a handrail 4 connected to the upper end of the lifting pipe 2 (in this embodiment, the handrail 4 is mounted on the lifting pipe 2 via a handrail support plate 5), wherein:

[0022] The lifting structure 3 includes a gear block 31, a gear block alignment and reset spring 32, and a gear shaft 33 disposed in the lifting tube 2, and a gear shaft closed-loop slide groove 34 disposed in the sleeve 1; the gear shaft closed-loop slide groove 34 includes a plurality of vertically arranged rack-shaped gear slots 341, a gear shaft upper sliding channel 342 connecting the gear slots 341, a gear shaft lower sliding channel 343 opposite to the gear slots 341 and parallel to the gear shaft upper sliding channel 342, and an upper inclined channel 344 and a lower inclined channel 345 connecting the upper end of the gear shaft upper sliding channel 342 and the gear shaft lower sliding channel 343 respectively; the gear block 31 is vertically arranged, and one end of it swings... The other end of the gear shift is aligned and reset by the gear shift block alignment and reset spring 32. After the gear shift shaft 33 is installed in the gear shift block 31, its end can slide cyclically along the gear shift shaft closed-loop slide groove 34. After the gear shift block 31 is vertically aligned under the action of the gear shift block alignment and reset spring 32, the gear shift shaft 33 is always located at the straight line formed by the bottom of all the gear shift grooves 341. When the handrail 4 is lifted upward (in this embodiment, the hand is usually held on the handrail support plate 5 to drive the handrail to lift), the gear shift shaft 33 swings slightly and slides upward from one of the gear shift grooves 341 and slides along a short section of the gear shift shaft upward sliding channel 342 before sliding down into the next gear shift groove 341.

[0023] When adjusting the armrest height of the office chair equipped with this utility model, the armrest 4 is pulled up by hand (in this embodiment, it is usually held on the armrest support plate 5 to lift the armrest). At this time, the armrest support plate 5 drives the stop block 31 to slide upward. At the same time, the stop shaft 33, under the action of the upper groove wall 3411 of one of the stop grooves 341, overcomes the force of the stop block alignment and return spring 32, causing the stop block to swing slightly at a small angle. At the same time, the stop shaft 33 slides out from along the upper groove wall 3411 of this stop groove 341 and slides upward a short distance along the stop shaft sliding channel 342. Then, under the action of the stop block alignment and return spring 32, it quickly slides into the next stop groove 34. In step 1, the height of the handrail is adjusted upwards in this manner. When the handrail 4 is raised to its highest point, the gear shaft 33 slides from the top of the gear shaft sliding channel 342 along the upward inclined channel 344. Then, under the action of gravity, when the handrail descends to the lowest position of the upward inclined channel 344, the gear shaft 33 begins to slide downwards along the gear shaft downward channel 343. When it slides to the bottom of the gear shaft downward channel 343, the gear shaft 33 slides along the downward inclined channel 345 until, under the action of the gear block alignment and return spring 32, the gear shaft 33 is located at the bottom of the straight line formed by connecting the bottoms of all the gear slots 341, and the handrail returns to its lowest position. Next, by holding the handrail support plate, the handrail can be raised again until the desired height is achieved.

[0024] As can be seen from the above, since the lifting structure 3 includes a gear block 31, a gear block alignment and reset spring 32, and a gear shaft 33 provided in the lifting tube 2, and a gear shaft closed-loop slide groove 34 provided in the sleeve 1, the gear shaft closed-loop slide groove 34 allows the gear shaft 33 to slide cyclically, thereby adjusting the handrail to a suitable height. In this way, unlike traditional lifting handrails, it is not necessary to press the button to unlock before pulling up or down the handrail to adjust the height. Therefore, the structure of this utility model is reasonable, the operation is convenient, and there is no need for button operation.

[0025] In this embodiment, as Figures 2 to 7 As shown, the gear block alignment and reset spring 32 consists of two compression springs, which are located on both sides of the vertical center line of the gear block 31 to keep the gear block aligned.

[0026] In this embodiment, as Figure 8 As shown, the rack-shaped gear slot 341 includes an upwardly inclined upper slot wall 3411, a horizontal lower slot wall 3412, and a semi-circular slot wall 3413 located between the upper slot wall 3411 and the lower slot wall 3412. This allows the gear shaft 33 to slide smoothly along the upper slot wall 3411 to the next gear slot 341, while preventing the gear shaft 33 from sliding from the lower slot wall 3412 to the next gear slot 341, thereby ensuring the reliability of the handrail lifting adjustment.

[0027] Preferably, the sleeve 1 includes a sleeve body 11 and a side cover 12 that covers the opening groove of the sleeve body 11; the gear shaft closed-loop sliding groove 34 has two sets, respectively disposed in the sleeve body 11 and the side cover 12, such as Figure 8 , 9 As shown, both ends of the gear shaft 33 can simultaneously slide along the closed-loop sliding groove 34 of the gear shaft in the sleeve body 11 and the side cover 12, which makes the cyclic sliding of the gear shaft smoother and more reliable, thereby ensuring the reliability of the handrail lifting adjustment and reducing the noise of the lifting adjustment.

[0028] 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.

[0029] 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 sleeve, a lifting tube fitted inside the sleeve and movable within the sleeve, a lifting structure, and an armrest connected to the upper end of the lifting tube, characterized in that... : The lifting structure includes a gear block, a gear block alignment and return spring, and a gear shaft disposed in the lifting tube, and a closed-loop slide groove for the gear shaft disposed in the sleeve; the closed-loop slide groove for the gear shaft includes multiple vertically arranged rack-shaped gear slots, an upper sliding channel for the gear shaft connecting the gear slots, a lower sliding channel for the gear shaft opposite to the gear slots and parallel to the upper sliding channel, 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, respectively; the gear block is vertical. The gear lever is configured such that one end is oscillatingly connected to the lifting tube, and the other end is oriented and reset by the gear block alignment and reset spring; after the gear lever is installed in the gear block, its end can slide cyclically along the closed-loop slide groove of the gear lever; after the gear block is vertically aligned under the action of the gear block alignment and reset spring, the gear lever is always located at the straight line formed by connecting the bottoms of all the gear slots; when the handrail is lifted upward, the gear lever slides out from one of the gear slots and slides along a short section of the gear lever upward sliding channel before sliding down into the next gear slot.

2. The office chair armrest lifting structure according to claim 1, characterized in that... The gear shift block alignment and reset spring consists of two compression springs, which are located on both sides of the vertical center line of the gear shift block.

3. The office chair armrest lifting structure according to claim 1, characterized in that... The rack-shaped gear slot includes an upwardly inclined upper slot wall, a horizontal lower slot wall, and a semi-circular slot wall located between the upper and lower slot walls.

4. The office chair armrest lifting structure according to any one of claims 1 to 3, characterized in that... The sleeve includes a sleeve body and a side cover that covers the opening groove of the sleeve body; there are two sets of closed-loop sliding grooves for the gear shaft, which are respectively provided in the sleeve body and the side cover; both ends of the gear shaft can simultaneously slide cyclically along the closed-loop sliding grooves of the gear shaft in the sleeve body and the side cover.

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