An office chair armrest support

Abstract

This utility model discloses an office chair armrest bracket, belonging to the technical field of office chair accessories. It includes: a first support cylinder with slots on both sides; a second support cylinder, sleeved on the outside of the first support cylinder and slidable relative to it; and anti-loosening plates, adapted to and fitted against the outer wall of the first support cylinder. Each anti-loosening plate has a locking block, which engages with the slots on both sides of the first support cylinder, allowing the two anti-loosening plates to be installed on both sides of the first support cylinder. The opposite sides of the two anti-loosening plates abut against the inner wall of the second support cylinder. By placing anti-loosening plates between the first and second support cylinders, loosening during relative sliding of the two support cylinders can be reduced, ensuring the stability of the armrest installed on top of the second support cylinder. Furthermore, the anti-loosening plates are engaged with the first support cylinder through a locking block and slot structure, resulting in a simple structure that is easy to manufacture and install, thus reducing costs.

Description

Technical Field

[0001] This utility model relates to the technical field of office chair accessories, and in particular to an office chair armrest bracket. Background Technology

[0002] Office chairs typically have height-adjustable armrests, allowing users to adjust the armrest height to suit different sitting postures and improve comfort. These height-adjustable armrests are supported by an armrest frame, which includes two relatively sliding support cylinders. After repeated height adjustments, these two relatively sliding support cylinders can easily loosen, affecting the stability of the armrest. Utility Model Content

[0003] The purpose of this utility model is to provide an office chair armrest support to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] The technical solution adopted to solve the above-mentioned technical problems is as follows: an office chair armrest bracket, comprising: a first support cylinder with slots on both sides, and multiple positioning slots arranged side by side on the first support cylinder; a second support cylinder, sleeved on the outside of the first support cylinder and slidable relative to the first support cylinder; anti-loosening plates, adapted and fitted to the outer wall of the first support cylinder, the anti-loosening plates being provided with locking blocks, the locking blocks on two anti-loosening plates respectively locking into the slots on both sides of the first support cylinder, so that the two anti-loosening plates are installed on both sides of the first support cylinder, and the opposite sides of the two anti-loosening plates respectively abut against the inner wall of the second support cylinder; an adjusting lever, rotatably mounted on the second support cylinder, one end of the adjusting lever extending out of the second support cylinder, and the other end of the adjusting lever being provided with a plug that can be inserted into one of the positioning slots.

[0005] The technical solution has at least the following beneficial effects: by setting an anti-loosening plate between the first support cylinder and the second support cylinder, the loosening situation when the two support cylinders slide relative to each other can be reduced, ensuring the stability of the handrail installed on the top of the second support cylinder. Moreover, the anti-loosening plate is engaged with the first support cylinder through a locking block and slot structure. The structure is simple and easy to manufacture, and it also facilitates the installation of the anti-loosening plate, thereby reducing costs.

[0006] As a further improvement to the above technical solution, the first support cylinder includes an inner cylinder and an outer cylinder sleeved on the outside of the inner cylinder. The inner cylinder and the outer cylinder are respectively provided with the slot and the positioning groove. The locking block passes through the slot of the outer cylinder and is inserted into the slot of the inner cylinder.

[0007] As a further improvement to the above technical solution, the inner cylinder is provided with a hook, the outer cylinder is provided with a locking hole for the hook to engage, and the top of the inner cylinder is provided with a limiting ring that abuts against the top surface of the outer cylinder.

[0008] As a further improvement to the above technical solution, the inner cylinder is provided with a U-shaped hole, so that the inner cylinder part forms an elastic sheet, and a protrusion is provided on the side of the elastic sheet near the outer cylinder. The elastic sheet and the protrusion form the hook.

[0009] As a further improvement to the above technical solution, at least two protrusions with the same length direction as the inner cylinder are provided on the outer periphery of the inner cylinder.

[0010] As a further improvement to the above technical solution, the inner cylinder is made of plastic and the outer cylinder is made of metal.

[0011] As a further improvement to the above technical solution, the cross-sections of the first support cylinder and the second support cylinder are both elliptical, and the anti-loosening plates are distributed at both ends of the major axis of the corresponding ellipse.

[0012] As a further improvement to the above technical solution, a seat lifting plate is also included. The seat lifting plate is equipped with a seat cushion and a backrest. The bottom of the first support cylinder extends through the second support cylinder and is equipped with a connecting plate. The connecting plate is detachably connected to the seat cushion.

[0013] As a further improvement to the above technical solution, it also includes a seat lifting plate, on which a seat cushion and a backrest are respectively installed. The bottom of the first support cylinder extends through the second support cylinder and is equipped with a connecting rod, which is detachably connected to the backrest.

[0014] As a further improvement to the above technical solution, the bottom of the backrest is provided with an installation groove, the top of the connecting rod is provided with an installation block that can be inserted into the installation groove, the bottom of the installation block is provided with a second bolt, the installation groove is provided with a bolt sleeve that can be screwed into the second bolt, a gap is provided between the bolt sleeve and the side wall of the installation groove, and the top of the installation block is provided with a filling block that can fill the gap. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0016] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0017] Figure 2 This is a cross-sectional three-dimensional structural diagram of Embodiment 1 of the present utility model;

[0018] Figure 3 This is a cross-sectional exploded view of Embodiment 1 of the present invention;

[0019] Figure 4 This is a cross-sectional three-dimensional structural diagram of Embodiment 2 of the present invention;

[0020] Figure 5 This is an exploded structural diagram of Embodiment 2 of the present invention;

[0021] Figure 6 This is a structural schematic diagram of Embodiment 3 of the present invention;

[0022] Figure 7 This is an exploded structural diagram of Embodiment 3 of the present invention;

[0023] Figure 8 This is a schematic diagram of the installation structure of Embodiment 3 of this utility model;

[0024] Figure 9 This is a structural schematic diagram of Embodiment 4 of the present invention;

[0025] Figure 10 This is an exploded structural diagram of Embodiment 4 of the present invention;

[0026] Figure 11 This is a schematic diagram of the installation structure of Embodiment 4 of this utility model.

[0027] 100. First support cylinder; 101. Slot; 102. Positioning slot; 110. Inner cylinder; 111. Hook; 112. U-shaped hole; 113. Elastic sheet; 114. Protrusion; 115. Limiting ring; 116. Protrusion strip; 120. Outer cylinder; 121. Locking hole; 200. Second support cylinder; 210. Armrest; 300. Anti-loosening plate; 310. Locking block; 400. Adjustment lever; 410. Insert block; 420. Button structure; 430. Spring; 500. Seat lifting plate; 510. Seat cushion; 520. Backrest; 530. Mounting slot; 600. Connecting plate; 700. Connecting rod; 710. Mounting block; 720. Bolt cylinder; 730. Gap; 740. Filler block. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] Example 1:

[0033] Reference Figure 1-3 The office chair armrest support includes a first support cylinder 100, a second support cylinder 200, and an adjustment lever 400. The second support cylinder 200 is sleeved on the outside of the first support cylinder 100, and the top of the second support cylinder 200 extends beyond the top of the first support cylinder 100 and is flared outwards. A pivot is provided in the middle of the adjustment lever 400, and the pivot is integrally formed with the adjustment lever 400. The two ends of the pivot are respectively rotatably mounted on both sides of the top of the second support cylinder 200, thereby rotatably connecting the adjustment lever 400 and the second support cylinder 200.

[0034] Both the first support cylinder 100 and the second support cylinder 200 have elliptical cross-sections. The first support cylinder 100 has multiple positioning grooves 102 arranged side-by-side along the vertical direction at one end of the major axis of the ellipse. The adjusting lever 400 is generally L-shaped, with one end extending downwards. Two inserts 410 are installed on one side of this downward-extending end, and these two inserts 410 are inserted into two adjacent positioning grooves 102. The other end of the adjusting lever 400 extends to one side and protrudes through one side of the second support cylinder 200. The portion of the adjusting lever 400 protruding from the second support cylinder 200 forms a button structure 420 for easy pressing. A handle 210 is installed on the top of the second support cylinder 200.

[0035] By pressing the button structure 420 upwards, the adjustment lever 400 can be rotated, causing the two inserts 410 to extend out of their corresponding positioning slots 102. At this time, the second support cylinder 200 can be pulled up and down relative to the first support cylinder 100, thereby adjusting the height of the handrail 210. Then, by pressing the button structure 420 downwards, the adjustment lever 400 can be rotated in the opposite direction, allowing the two inserts 410 to be inserted into the two adjacent positioning slots 102 at the corresponding heights, thereby limiting the sliding of the second support cylinder 200 relative to the first support cylinder 100 and stabilizing the height position of the handrail 210.

[0036] Furthermore, a spring 430 is installed at the top of the end of the adjustment lever 400 where the button structure 420 is located. The end of the spring 430 away from the adjustment lever 400 abuts against the bottom of the armrest 210, so that the elastic force of the spring 430 pushes the button structure 420 of the adjustment lever 400 to the lowest position, at which time the insert 410 is inserted into the positioning groove 102. When adjusting the height of the armrest 210, it is necessary to press the adjustment lever 400 upward against the elastic force of the spring 430. When the button structure 420 is released, the elasticity of the spring 430 can cause the insert 410 to re-insert into the positioning groove 102 of the corresponding height, so as to facilitate the height adjustment operation of the armrest 210.

[0037] Anti-loosening plates 300 are distributed on both sides of the top of the first support cylinder 100, with the two anti-loosening plates 300 respectively distributed at the two ends of the major axis of the elliptical cross-section of the first support cylinder 100.

[0038] A locking block 310 is provided in the middle of the side of the anti-loosening plate 300 near the first support cylinder 100. The locking block 310 is integrally formed with the anti-loosening plate 300. A slot 101 is provided on both sides of the top of the first support cylinder 100. The two slots 101 are located at the two ends of the major axis of the elliptical cross-section of the first support cylinder 100.

[0039] By embedding the locking block 310 into the corresponding slot 101, the anti-loosening piece 300 can be fixed to the outer wall of the first support cylinder 100. The sides of the two anti-loosening pieces 300 that are close to each other are fitted against the outer wall of the first support cylinder 100, while the sides of the two anti-loosening pieces 300 that are opposite to each other abut against the inner wall of the second support cylinder 200. The anti-loosening piece 300 is made of wear-resistant plastic material. The anti-loosening piece 300 serves to prevent loosening and is wear-resistant, thus ensuring the long-term stability of the handrail 210.

[0040] Example 2:

[0041] Reference Figure 4-5 The difference between this embodiment and Embodiment 1 lies in the structure of the first support cylinder 100. In this embodiment, the first support cylinder 100 includes an inner cylinder 110 and an outer cylinder 120.

[0042] The outer cylinder 120 is fitted over the inner cylinder 110, and the length of the inner cylinder 110 is less than the length of the outer cylinder 120. Slots 101 are provided at corresponding positions on both the inner cylinder 110 and the outer cylinder 120. The locking block 310 on the anti-loosening plate 300 passes through the slot 101 of the outer cylinder 120 and is inserted into the slot of the inner cylinder 110, thereby achieving mutual restraint between the inner cylinder 110, the outer cylinder 120, and the anti-loosening plate 300.

[0043] Multiple positioning slots 102 are arranged side by side at corresponding positions of the inner cylinder 110 and the outer cylinder 120. The two inserts 410 of the adjusting lever 400 can be inserted into only two adjacent positioning slots 102 of the inner cylinder 110, or the inserts 410 of the adjusting lever 400 can pass through the positioning slots 102 of the inner cylinder 110 first and then be inserted into the positioning slots 102 of the outer cylinder 120, thereby achieving relative fixation of the first support cylinder 100 and the second support cylinder 200.

[0044] Both sides of the inner cylinder 110 are provided with hooks 111, with the two hooks 111 respectively distributed on both sides of the minor axis of the elliptical cross-section of the inner cylinder 110. Both sides of the inner cylinder 110 have U-shaped holes 112, forming an elastic sheet 113 with significant elastic deformation capability in the portion of the inner cylinder 110 surrounded by the U-shaped holes 112. A protrusion 114 is provided on the side of the elastic sheet 113 facing the outer cylinder 120. The protrusion 114 and the elastic sheet 113 are integrally formed. It can be understood that the elastic sheet 113 and the protrusion 114 combine to form the hook 111 structure.

[0045] The outer cylinder 120 has locking holes 121 on both sides, located on either side of the minor axis of the elliptical cross-section of the outer cylinder 120. The inner cylinder 110 has a limiting ring 115 at its top, protruding from the outer wall of the inner cylinder 110. When the inner cylinder 110 is fitted into the outer cylinder 120, and when the limiting ring 115 just abuts against the top surface of the outer cylinder 120, the two hooks 111 engage with the corresponding locking holes 121, thus securing the inner cylinder 110 to the outer cylinder 120. The inner cylinder 110 can be made of plastic, while the outer cylinder 120 can be made of metal. The structural and material design of the inner cylinder 110 and outer cylinder 120 simplifies the manufacturing process and saves costs.

[0046] Four protruding strips 116 are provided on the outer periphery of the inner cylinder 110. The length direction of the protruding strips 116 is the same as that of the inner cylinder 110, and the protruding strips 116 protrude slightly from the outer periphery of the inner cylinder 110. The four protruding strips 116 are arranged in pairs on both sides of the inner cylinder 110. In other embodiments, the number of protruding strips 116 may also be two, six, etc.

[0047] Example 3:

[0048] Reference Figure 6-8The difference between this embodiment and other embodiments is that the office chair armrest support also includes a seat lifting plate 500, a seat cushion 510, and a backrest 520, with the seat cushion 510 and backrest 520 sequentially installed at the top of the seat lifting plate 500. In this embodiment, the seat lifting plate 500 can be used to install a lifting device, and the bottom of the lifting device is equipped with casters. This gives the office chair both lifting and sliding functions.

[0049] The bottom of the first support cylinder 100 extends through the bottom of the second support cylinder 200 and is fitted with a connecting plate 600. It can be understood that if the first support cylinder 100 includes an inner cylinder 110 and an outer cylinder 120, then the outer cylinder 120 extends through the bottom of the second support cylinder 200 and is fitted with the connecting plate 600.

[0050] The connecting plate 600 has three grooves for inserting and adjusting the position of the first bolt. The first bolt is inserted into the bottom of the seat cushion 510, allowing the connecting plate 600 to be detachably installed on the side of the bottom of the seat cushion 510. That is, the bottoms of the two first support cylinders 100 are respectively installed on both sides of the bottom of the seat cushion 510 via corresponding connecting plates 600, thus enabling adjustable armrests 210 to be installed on both sides of the seat. The connecting plate 600 and the first support cylinders 100 are integrally formed, improving the support and stability of the armrests.

[0051] Example 4:

[0052] Reference Figure 9-11 The difference between this embodiment and embodiment three is that the installation structure and position of the first support cylinder 100 are different.

[0053] In this embodiment, the bottom of the first support cylinder 100 extends through the bottom of the second support cylinder 200 and is equipped with a connecting rod 700. It can be understood that if the first support cylinder 100 includes an inner cylinder 110 and an outer cylinder 120, then the outer cylinder 120 extends through the bottom of the second support cylinder 200 and is equipped with a connecting rod 700.

[0054] A mounting block 710 is provided at the end of the connecting rod 700 away from the first support cylinder 100. The thickness of the mounting block 710 is less than the thickness of the connecting rod 700, so that the top surface of the mounting block 710 is lower than the top surface of the connecting rod 700, and the bottom surface of the mounting block 710 is flush with the bottom surface of the connecting rod 700.

[0055] The backrest 520 has mounting grooves 530 on both sides of its bottom. Three bolt cylinders 720 are provided on the downward side wall of the mounting groove 530. The number of bolt cylinders 720 is set according to the actual situation.

[0056] The bottom of the mounting block 710 is provided with a second bolt that passes through the mounting block 710 and is screwed into the corresponding bolt sleeve 720, thereby detachably connecting the connecting rod 700 and the backrest 520.

[0057] In addition, a gap 730 is provided between the side wall of the bolt sleeve 720 and the side wall of the mounting groove 530. A filler block 740 is provided on the top of the mounting block 710. The filler block 740 is divided into multiple parts and fills all the gaps 730 respectively. The height of the top surface of the filler block 740 is the same as or slightly lower than the height of the top surface of the connecting rod 700.

[0058] When installing the connecting rod 700, inserting the filler block 740 into the gap 730 allows for initial positioning and pre-fixation of the connecting rod 700, facilitating the insertion of the second bolt to securely connect the connecting rod 700 to the backrest 520. It is understood that after the connecting rod 700 is installed on the backrest 520, it will be in a horizontal or near-horizontal position.

[0059] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An office chair armrest support, characterized in that, include: The first support cylinder has slots on both sides and multiple positioning slots arranged side by side. The second support cylinder is sleeved on the outside of the first support cylinder and can slide relative to the first support cylinder; The anti-loosening plate is adapted to fit the outer side wall of the first support cylinder. The anti-loosening plate is provided with a locking block. The locking blocks on the two anti-loosening plates are respectively locked into the locking grooves on both sides of the first support cylinder, so that the two anti-loosening plates are installed on both sides of the first support cylinder. The opposite sides of the two anti-loosening plates abut against the inner side wall of the second support cylinder. An adjusting lever is rotatably mounted on the second support cylinder. One end of the adjusting lever extends out of the second support cylinder, and the other end of the adjusting lever is provided with a plug that can be inserted into one of the positioning slots.

2. The office chair armrest support according to claim 1, characterized in that: The first support cylinder includes an inner cylinder and an outer cylinder sleeved on the outside of the inner cylinder. The inner cylinder and the outer cylinder are respectively provided with the slot and the positioning slot. The locking block passes through the slot of the outer cylinder and is inserted into the slot of the inner cylinder.

3. The office chair armrest support according to claim 2, characterized in that: The inner cylinder is provided with a hook, the outer cylinder is provided with a hole for the hook to engage, and the top of the inner cylinder is provided with a limiting ring that abuts against the top surface of the outer cylinder.

4. The office chair armrest support according to claim 3, characterized in that: The inner cylinder has a U-shaped hole, which makes the inner cylinder part form an elastic sheet. The elastic sheet has a protrusion on the side near the outer cylinder. The elastic sheet and the protrusion form the hook.

5. The office chair armrest support according to claim 2, characterized in that: The outer periphery of the inner cylinder is provided with at least two protrusions whose length direction is the same as that of the inner cylinder.

6. The office chair armrest support according to claim 2, characterized in that: The inner cylinder is made of plastic, and the outer cylinder is made of metal.

7. The office chair armrest support according to claim 1, characterized in that: The cross-sections of the first support cylinder and the second support cylinder are both elliptical, and the anti-loosening plates are distributed at both ends of the major axis of the corresponding ellipse.

8. The office chair armrest support according to claim 1, characterized in that: It also includes a seat lifting plate, on which a seat cushion and a backrest are respectively installed. The bottom of the first support cylinder extends through the second support cylinder and is equipped with a connecting plate, which is detachably connected to the seat cushion.

9. The office chair armrest support according to claim 1, characterized in that: It also includes a seat lifting plate, on which a seat cushion and a backrest are respectively installed. The bottom of the first support cylinder extends through the second support cylinder and is equipped with a connecting rod, which is detachably connected to the backrest.

10. The office chair armrest support according to claim 9, characterized in that: The backrest has a mounting groove at the bottom, and the top of the connecting rod has a mounting block that can be inserted into the mounting groove. A second bolt is inserted through the bottom of the mounting block. The mounting groove has a bolt sleeve that can be screwed into the second bolt. There is a gap between the bolt sleeve and the side wall of the mounting groove. The top of the mounting block has a filling block that can fill the gap.

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