Headrest adjusting device of office chair

Abstract

The utility model provides a headrest adjusting device of an office chair, and relates to the technical field of office chairs, the headrest adjusting device comprises a bottom plate and an office chair main body, the outer wall of the office chair main body is fixedly connected with an adjusting assembly, the adjusting assembly comprises a shell fixedly connected to the outer wall of the office chair main body, the interior of the shell is rotatably connected with a lead screw through a bearing, and the lead screw is fixedly connected with the bottom plate. A driving part is arranged at the bottom of the shell, the outer wall of the lead screw is in threaded connection with a lifting column, the outer wall of the lifting column is in sliding connection with the inner wall of the shell, and the top of the lifting column is fixedly connected with a connecting plate. By installing the adjusting assembly, users with different requirements can flexibly adjust the angle of the headrest in real time, the heads and the necks of the users can be well attached to the headrest, and therefore the comfortable supporting effect is achieved, the comfort degree during office work or rest is improved, automatic adjustment is achieved, manual adjustment is not needed, and manpower is saved.

Description

Technical Field

[0001] This utility model relates to the field of office chair technology, and in particular to a headrest adjustment device for an office chair. Background Technology

[0002] An office chair is a chair used in an office or other workplace. It is an indispensable piece of furniture in modern office spaces. Its design and function are based on the needs of the office environment. It is mainly designed to meet the needs of people working for long periods of time, holding meetings, receiving guests, and other work activities. It is used to support the human body, reduce fatigue, and improve work efficiency.

[0003] Existing office chair headrests have many shortcomings in terms of adjustment function. Some headrests require manual height adjustment or are directly fixed to the office chair, making the adjustment process cumbersome, time-consuming, laborious, and inconvenient, thus reducing the user experience. In addition, most headrests have a fixed angle and cannot automatically adjust according to the user's sitting posture and personalized needs, making it difficult to meet the comfort support requirements in different work scenarios. Utility Model Content

[0004] The purpose of this invention is to provide a headrest adjustment device for an office chair to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a headrest adjustment device for an office chair, comprising an office chair body, wherein an adjustment component is fixedly connected to the outer wall of the office chair body;

[0006] The adjustment assembly includes a housing fixedly connected to the outer wall of the office chair body. A lead screw is rotatably connected to the inside of the housing via a bearing. A drive component is located at the bottom of the housing. A lifting column is threadedly connected to the outer wall of the lead screw. The outer wall of the lifting column is slidably connected to the inner wall of the housing. A connecting plate is fixedly connected to the top of the lifting column. Connecting members are symmetrically connected to the outer wall of the connecting plate via a rotating shaft. A backrest is fixedly connected to the outer wall of the connecting member. An inclined plate is fixedly connected to one side of the outer wall of the backrest. An electric push rod is rotatably connected to the inside of the connecting plate via a rotating shaft. A connecting block is fixedly connected to the output end of the electric push rod. The outer wall of the connecting block is rotatably connected to the inner wall of the inclined plate via a rotating shaft. A locking assembly is located inside the backrest.

[0007] Preferably, the driving component includes a motor fixedly connected to the bottom of the housing, and the output shaft end of the motor is fixedly connected to the bottom of the lead screw.

[0008] Preferably, the snap-fit ​​assembly includes a plurality of sliding grooves symmetrically formed on the outer wall of the backrest, a headrest is snapped into the inside of the backrest, the outer wall of the headrest is symmetrically formed with slots, a snap-fit ​​block is snapped into the inside of the slots, a plurality of sliding pillars are fixedly connected at equal intervals to the outer wall of the snap-fit ​​block, the outer walls of the plurality of sliding pillars are slidably connected to the inner wall of the sliding groove, a spring is sleeved on the outer wall of each of the plurality of sliding pillars, and a pull block is fixedly connected to one end of each of the plurality of sliding pillars that penetrates the sliding groove.

[0009] Preferably, one end of each of the springs is fixedly connected to the inner wall of the backing plate, and the other end of each of the springs is fixedly connected to one side of the outer wall of the locking block.

[0010] Preferably, the outer wall of the lead screw is provided with an external thread, which cooperates with the internal thread of the inner wall of the lifting column to achieve a threaded connection. The lifting column is a square column structure with rectangular slide rails symmetrically arranged on its outer wall. The inner wall of the outer shell is symmetrically provided with rectangular sliding grooves. The outer wall of the lifting column and the inner wall of the outer shell are slidably connected through the sliding cooperation of the slide rails and sliding grooves.

[0011] Preferably, the backrest is an arc-shaped structure, and the headrest, sliding column, and locking block are all arc-shaped structures adapted to the curvature of the backrest. When the locking block engages with the locking slot, the arc surface of the arc-shaped locking block is tightly fitted with the inner wall of the arc-shaped locking slot.

[0012] Preferably, the outer shell is a hollow cuboid structure, and the top and bottom of the outer shell are provided with through holes adapted to the lead screw.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, by installing an adjustment component, users with different needs can flexibly adjust the angle of the headrest in real time, so that their head and neck fit well with the headrest, thereby obtaining a more comfortable support effect, thus improving the comfort during work or rest. The automatic adjustment eliminates the need for several manual adjustments, saving manpower.

[0015] 2. In this utility model, by installing the snap-fit ​​component, the headrest is connected to the backrest through the snap-fit ​​component. When it is necessary to clean the headrest or replace the damaged headrest, simply pull the pull block to disengage the snap block from the slot, and the headrest can be easily removed. The operation is simple and convenient, without the need for tools, saving time and effort. The structure is simple and easy to maintain. Attached Figure Description

[0016] Figure 1 This utility model provides a perspective view of the main structure of a headrest adjustment device for an office chair.

[0017] Figure 2This utility model provides a schematic diagram of the adjustment component structure of a headrest adjustment device for an office chair;

[0018] Figure 3 This utility model provides a schematic diagram of the internal structure of the drive component of a headrest adjustment device for an office chair.

[0019] Figure 4 This utility model provides a schematic diagram of the headrest structure of an adjustable headrest device for an office chair;

[0020] Figure 5 This utility model provides a schematic diagram of the snap-fit ​​assembly structure of a headrest adjustment device for an office chair.

[0021] Legend:

[0022] 1. Office chair body; 2. Adjustment components; 201. Shell; 202. Lead screw; 2021. Motor; 203. Lifting column; 204. Connecting plate; 205. Connector; 206. Backrest; 207. Inclined plate; 208. Electric push rod; 209. Connecting block; 3. Snap-fit ​​components; 301. Slide groove; 302. Headrest; 303. Slot; 304. Snap-fit ​​block; 305. Slide column; 306. Spring; 307. Pull block. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0025] Please see Figures 1-5 As shown, this utility model provides a technical solution: a headrest adjustment device for an office chair, including an office chair body 1, and an adjustment component 2 fixedly connected to the outer wall of the office chair body 1;

[0026] The adjustment assembly 2 includes a housing 201 fixedly connected to the outer wall of the office chair body 1. A lead screw 202 is rotatably connected to the inside of the housing 201 via a bearing. A drive component is provided at the bottom of the housing 201. A lifting column 203 is threadedly connected to the outer wall of the lead screw 202. The outer wall of the lifting column 203 is slidably connected to the inner wall of the housing 201. A connecting plate 204 is fixedly connected to the top of the lifting column 203. A connecting piece 205 is symmetrically rotatably connected to the outer wall of the connecting plate 204 via a rotating shaft. A backrest 206 is fixedly connected to the outer wall of the connecting piece 205. An inclined plate 207 is fixedly connected to one side of the outer wall of the backrest 206. An electric push rod 208 is rotatably connected to the inside of the connecting plate 204 via a rotating shaft. A connecting block 209 is fixedly connected to the output end of the electric push rod 208. The outer wall of the connecting block 209 is rotatably connected to the inner wall of the inclined plate 207 via a rotating shaft. A snap-fit ​​assembly 3 is provided inside the backrest 206.

[0027] Furthermore, the driving component includes a motor 2021 fixedly connected to the bottom of the housing 201, and the output shaft end of the motor 2021 is fixedly connected to the bottom of the lead screw 202, thereby driving the lead screw 202 to rotate.

[0028] Furthermore, the snap-fit ​​assembly 3 includes several sliding grooves 301 symmetrically formed on the outer wall of the backrest 206. A headrest 302 is snapped into the inside of the backrest 206. The outer wall of the headrest 302 is symmetrically formed with slots 303. A locking block 304 is snapped into the inside of the slots 303. Several sliding posts 305 are fixedly connected at equal intervals to the outer wall of the locking blocks 304. The outer walls of the sliding posts 305 are slidably connected to the inner wall of the sliding grooves 301. A spring 306 is sleeved on the outer wall of each sliding post 305. A pull block 307 is fixedly connected to one end of each sliding post 305 that penetrates the sliding grooves 301, which facilitates the installation and removal of the headrest 302 and improves the ease of operation.

[0029] Furthermore, one end of several springs 306 is fixedly connected to the inner wall of the backing plate 206, and the other end of several springs 306 is fixedly connected to one side of the outer wall of the locking block 304.

[0030] Furthermore, the outer wall of the lead screw 202 is provided with an external thread, which cooperates with the internal thread of the inner wall of the lifting column 203 to achieve a threaded connection. The lifting column 203 has a square column structure, and rectangular slide rails are symmetrically arranged on its outer wall. Rectangular sliding grooves are symmetrically opened on the inner wall of the outer shell 201. The outer wall of the lifting column 203 and the inner wall of the outer shell 201 are slidably connected through the sliding cooperation of the slide rails and sliding grooves, which improves the compatibility between components. The slide rails and sliding grooves can improve the stability of the lifting column 203 during the lifting process and play a limiting role.

[0031] Furthermore, the backrest 206 has an arc-shaped structure, and the headrest 302, sliding column 305, and locking block 304 are all arc-shaped structures that are adapted to the curvature of the backrest 206. When the locking block 304 is engaged with the locking groove 303, the arc surface of the arc-shaped locking block 304 is closely fitted with the inner wall of the arc-shaped locking groove 303. All of them are arc-shaped structures that are adapted to it, which makes it easier for the locking block 304 and the locking groove 303 to engage more tightly and stably.

[0032] Furthermore, the outer shell 201 is a hollow cuboid structure, and the top and bottom of the outer shell 201 are provided with through holes that are compatible with the lead screw 202, so as to facilitate the installation of the lead screw 202 and improve compatibility.

[0033] Working principle: First, when the headrest height needs to be adjusted, the motor 2021 at the bottom of the outer shell 201 is started. The output shaft of the motor 2021 drives the lead screw 202 to rotate. Since the lead screw 202 and the lifting column 203 are connected by threads, under the action of thread transmission, the lifting column 203 slides stably up and down along the rectangular sliding groove on the inner wall of the outer shell 201 and relies on the rectangular slide rail on the outer wall. This drives the connecting plate 204, the backrest 206 and the headrest 302 at the top to adjust their height to meet the needs of users of different heights.

[0034] To adjust the angle of the backrest 206, the electric push rod 208 starts working. Its output end is connected to the inclined plate 207 via a pivot through the connecting block 209. As the electric push rod 208 extends and retracts, the connecting block 209 drives the inclined plate 207 to rotate around the pivot, thereby adjusting the angle of the backrest 206 around the pivot on the connecting plate 204 to adapt to the personalized needs of different users for head support angle and provide a more fitting and comfortable support for the neck.

[0035] When the headrest 302 needs to be replaced and cleaned, pull the pull blocks 307 on both sides of the backrest 206 outwards. At this time, the spring 306 sleeved on the outside of the slide column 305 is compressed, and the locking block 304 connected to the slide column 305 slides out of the slot 303. At this time, the staff needs to remove the headrest 302 from the backrest 206 for cleaning or replacement. During installation, pull the pull blocks 307 again to drive the slide column 305 and the locking block 304 to slide along the slide groove 301, compressing the spring 306. Place the clean headrest 302 inside the backrest 206, release the pull blocks 307 on both sides, the spring 306 returns to its original position, and the locking block 304 engages with the slots 303 on both sides of the headrest 302, thereby fixing the headrest 302.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A headrest adjustment device of an office chair comprising an office chair body (1), characterized in that: An adjustment assembly (2) is fixedly connected to the outer wall of the main body (1) of the office chair; The adjustment assembly (2) includes a housing (201) fixedly connected to the outer wall of the office chair body (1). A lead screw (202) is rotatably connected inside the housing (201) via a bearing. A driving component is provided at the bottom of the housing (201). A lifting column (203) is threadedly connected to the outer wall of the lead screw (202). The outer wall of the lifting column (203) is slidably connected to the inner wall of the housing (201). A connecting plate (204) is fixedly connected to the top of the lifting column (203). The outer wall of the connecting plate (204) is symmetrically connected to a rotating shaft. A connecting piece (205) is rotatably connected, and a backing plate (206) is fixedly connected to the outer wall of the connecting piece (205). An inclined plate (207) is fixedly connected to one side of the outer wall of the backing plate (206). An electric push rod (208) is rotatably connected to the inside of the connecting plate (204) through a rotating shaft. A connecting block (209) is fixedly connected to the output end of the electric push rod (208). The outer wall of the connecting block (209) and the inner wall of the inclined plate (207) are rotatably connected through a rotating shaft. A snap-fit ​​assembly (3) is provided inside the backing plate (206).

2. The headrest adjustment device of claim 1, wherein: The driving component includes a motor (2021) fixedly connected to the bottom of the housing (201), and the output shaft end of the motor (2021) is fixedly connected to the bottom of the lead screw (202).

3. The headrest adjustment device of claim 1, wherein: The snap-fit ​​assembly (3) includes a plurality of sliding grooves (301) symmetrically opened on the outer wall of the backrest (206). A headrest (302) is snapped into the inside of the backrest (206). A snap-fit ​​groove (303) is symmetrically opened on the outer wall of the headrest (302). A snap-fit ​​block (304) is snapped into the inside of the snap-fit ​​groove (303). A plurality of sliding pillars (305) are fixedly connected at equal intervals on the outer wall of the snap-fit ​​block (304). The outer walls of the plurality of sliding pillars (305) are slidably connected to the inner wall of the sliding groove (301). A spring (306) is sleeved on the outer wall of each of the plurality of sliding pillars (305). A pull block (307) is fixedly connected to one end of each of the plurality of sliding pillars (305) that penetrates the sliding groove (301).

4. A headrest adjustment device for an office chair according to claim 3, wherein: One end of several springs (306) is fixedly connected to the inner wall of the backing plate (206), and the other end of several springs (306) is fixedly connected to one side of the outer wall of the locking block (304).

5. The headrest adjustment device of claim 1, wherein: The outer wall of the lead screw (202) is provided with an external thread, which cooperates with the internal thread of the inner wall of the lifting column (203) to achieve a threaded connection. The lifting column (203) is a square column structure, and rectangular slide rails are symmetrically arranged on its outer wall. Rectangular sliding grooves are symmetrically opened on the inner wall of the outer shell (201). The outer wall of the lifting column (203) and the inner wall of the outer shell (201) are slidably connected through the sliding cooperation of the slide rails and sliding grooves.

6. The headrest adjustment device of claim 3, wherein: The backrest (206) has an arc-shaped structure. The headrest (302), sliding column (305), and locking block (304) are all arc-shaped structures that are adapted to the curvature of the backrest (206). When the locking block (304) is engaged with the locking groove (303), the arc surface of the arc-shaped locking block (304) is tightly fitted with the inner wall of the arc-shaped locking groove (303).

7. The headrest adjustment device of claim 1, wherein: The outer shell (201) is a hollow cuboid structure, and the top and bottom of the outer shell (201) are provided with through holes that are compatible with the lead screw (202).

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