Ergonomic leisure chair with liftable headrest

Abstract

The utility model provides an ergonomic leisure chair with a liftable headrest, and relates to the technical field of ergonomic chairs. Comprising a backrest and a headrest, a lifting mechanism matched with the headrest is arranged in the backrest, and the lifting mechanism comprises a mounting groove formed in the inner side of the backrest, a sliding groove connected to one side of the mounting groove in a communicating mode, a fixing piece arranged on the inner side of the sliding groove in a sliding mode, a sliding block fixedly connected to one side of the fixing piece and a lead screw rotationally arranged on the inner side of the mounting groove; the sliding block is arranged on the outer side of the lead screw in a sleeving mode and forms threaded transmission with the lead screw, the headrest is fixedly connected to the side, away from the sliding block, of the fixing piece, the bottom end of the lead screw is coaxially and fixedly connected with an adjusting shaft, the adjusting shaft is connected with a driving assembly and a locking assembly, and an expansion groove matched with the driving assembly and the locking assembly is formed in the bottom of the mounting groove. The headrest solves the problem that height adjustment of an existing headrest has certain limitation and cannot meet the use requirements of small crowds.

Description

Technical Field

[0001] The utility model provides an ergonomic leisure chair with a liftable headrest, and relates to the technical field of ergonomic chairs. Background Art

[0002] An ergonomic chair is a chair designed to adapt to ergonomic principles, aiming to improve work efficiency and reduce physical discomfort. This type of chair usually has adjustable seats, backrests, armrests, headrests and other features to accommodate people of different heights, body shapes and working environments. The main design purpose of an ergonomic chair is to make the neck, back, waist and buttocks fit closely to the chair, providing continuous support, thereby reducing the discomfort caused by long-term sitting, such as low back pain, shoulder and neck pain, etc.

[0003] Although the headrest of the existing ergonomic leisure chair can be adjusted in height, since the headrest is usually set at the top of the backrest, it can only be adjusted upwards. The height of the headrest can never be lower than the backrest, and the adjustment range is relatively small. For some people with small heads, it may have certain limitations. Therefore, we propose an ergonomic leisure chair with a liftable headrest. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the height adjustment of the existing headrest has certain limitations and cannot meet the use needs of people of short stature.

[0005] To solve the above technical problems, the technical solution provided by the utility model is: a headrest with a liftable ergonomic leisure chair, comprising a backrest and a headrest, a lifting mechanism matching the headrest being arranged in the backrest, the lifting mechanism comprising a mounting groove opened on the inner side of the backrest, a slide groove connected to one side of the mounting groove, a fixing piece slidably placed on the inner side of the slide groove, a slider fixed to one side of the fixing piece, and a lead screw rotatably arranged on the inner side of the mounting groove, the slider being sleeved on the outer side of the lead screw and forming a threaded transmission with the lead screw, the headrest being fixed to a side of the fixing piece away from the slider, an adjusting shaft being coaxially fixed to the bottom end of the lead screw, the adjusting shaft being connected to a driving assembly and a locking assembly, and an expansion groove matching the driving assembly and the locking assembly being opened at the bottom of the mounting groove.

[0006] Preferably, the driving assembly includes a driven bevel gear coaxially fixed to the adjusting shaft, a rotating rod rotatably arranged on the side wall of the expansion groove, and an active bevel gear fixed to one end of the rotating rod and meshing with the driven bevel gear, and the end of the rotating rod away from the active bevel gear passes through the side wall of the expansion groove and is fixed with an adjusting knob.

[0007] Preferably, the locking assembly includes a locking sleeve fixedly connected to the inner wall of the expansion slot and rotatably connected to the adjustment shaft, and a locking block cooperating with the locking sleeve. The locking sleeve is an annular plate body with an opening on one side, and guide plates are symmetrically and fixedly connected to both sides of the opening. The locking block is slidably disposed between the guide plates, and a threaded rod is rotatably connected to the locking block. One end of the threaded rod away from the locking block penetrates the side wall of the expansion slot and is fixedly connected to a locking knob.

[0008] Preferably, an arc surface cooperating with the adjustment shaft is provided on one side of the locking block close to the adjustment shaft, and a friction strip is fixedly connected to the arc surface.

[0009] Preferably, the shape of the installation slot matches that of the slider, and the outer side of the slider closely adheres to the inner wall of the installation slot and is slidably connected to the installation slot.

[0010] Preferably, the fixing members are U-shaped plate bodies and are symmetrically arranged in two. The fixing members are bolted and fixed to both the headrest and the slider.

[0011] The beneficial effects of the present utility model:

[0012] In the present utility model, the length of the backrest is at least twice that of the seat. A relatively high backrest is adopted, and then the headrest is arranged inside the backrest. Then, the headrest is driven to move upward by a lifting mechanism arranged inside the backrest, so that a relatively large height adjustment range can be obtained, and it can be applicable to more people. Description of the Drawings

[0013] Figure 1 is a schematic diagram of the overall structure of an ergonomic leisure chair with a liftable headrest according to the present utility model.

[0014] Figure 2 is a partial half-sectional view of an ergonomic leisure chair with a liftable headrest according to the present utility model.

[0015] Figure 3 is a partial enlarged view of an ergonomic leisure chair with a liftable headrest according to the present utility model.

[0016] Figure 4 is an exploded view of the locking assembly of an ergonomic leisure chair with a liftable headrest according to the present utility model.

[0017] Figure 5 is a schematic diagram of the structure of the fixing member of an ergonomic leisure chair with a liftable headrest according to the present utility model.

[0018] (1. Backrest; 2. Headrest; 3. Slide groove; 4. Slide block; 5. Lead screw; 6. Installation groove; 7. Adjusting knob; 8. Rotating rod; 9. Locking knob; 10. Locking sleeve; 11. Fixing part; 12. Driven bevel gear; 13. Adjusting shaft; 14. Driving bevel gear; 15. Locking block; 16. Expansion groove; 17. Threaded rod; 18. Friction strip; 19. Guide plate) Detailed implementation manner

[0019] The preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

[0020] Referring to Figures 1 to 5 , the present utility model provides an ergonomic leisure chair with a height-adjustable headrest, including a backrest 1 and a headrest 2. An elevating mechanism matched with the headrest 2 is arranged inside the backrest 1. The elevating mechanism includes an installation groove 6 opened on the inner side of the backrest 1, a slide groove 3 connected and communicated with one side of the installation groove 6, a fixing part 11 slidably placed inside the slide groove 3, a slide block 4 fixedly connected to one side of the fixing part 11, and a lead screw 5 rotatably arranged inside the installation groove 6. The slide block 4 is sleeved outside the lead screw 5 and forms a threaded drive with the lead screw 5. The headrest 2 is fixedly connected to the side of the fixing part 11 away from the slide block 4. The fixing part 11 is a U-shaped plate body and is symmetrically provided with two. The fixing part 11 is fixedly connected to the headrest 2 and the slide block 4 by bolts. The shape of the installation groove 6 is matched with the slide block 4. The outer side of the slide block 4 is closely attached to the inner wall of the installation groove 6 and is slidably connected with the installation groove 6. Specifically, the slide block 4 is closely attached to the inner wall of the installation groove 6, so that the slide block 4 cannot rotate and can only move longitudinally along the installation groove 6. Therefore, when the lead screw 5 rotates, the slide block 4 can be driven to move. The slide block 4 drives the headrest 2 to move up and down through the fixing part 11, so as to adjust the height. In the present utility model, the length of the backrest 1 is at least twice the length of the seat. A relatively high backrest 1 is adopted, and then the headrest 2 is arranged inside the backrest 1, so as to obtain a relatively large height adjustment range.

[0021] Furthermore, in the present utility model, the bottom end of the lead screw 5 is coaxially fixedly connected with an adjusting shaft 13. The adjusting shaft 13 is connected with a driving assembly and a locking assembly. An expansion groove 16 matched with the driving assembly and the locking assembly is opened at the bottom of the installation groove 6. Specifically, the driving assembly is used to drive the lead screw 5 to rotate, and the locking assembly is used to lock the lead screw 5 after the height is adjusted to prevent reverse rotation and ensure the height stability of the headrest 2.

[0022] Further, the driving assembly in the utility model includes a driven bevel gear 12 coaxially fixed to the adjusting shaft 13, a rotating rod 8 rotatably arranged on the side wall of the expansion slot 16, and a driving bevel gear 14 fixed to one end of the rotating rod 8 and meshing with the driven bevel gear 12, and one end of the rotating rod 8 away from the driving bevel gear 14 penetrates the side wall of the expansion slot 16 and is fixed to the adjusting knob 7. Specifically, by rotating the rotating rod 8 through the adjusting knob 7, the driving bevel gear 14 is driven to rotate, the driving bevel gear 14 drives the driven bevel gear 12 to rotate, and the driven bevel gear 12 drives the lead screw 5 to rotate.

[0023] Furthermore, the locking assembly in the utility model includes a locking sleeve 10 fixedly connected to the inner wall of the expansion groove 16 and rotatably connected to the adjustment shaft 13, and a locking block 15 matched with the locking sleeve 10. The locking sleeve 10 is an annular plate body with an opening on one side, and guide plates 19 are symmetrically fixedly connected to both sides of the opening. The locking block 15 is slidably placed between the guide plates 19, and the locking block 15 is rotatably connected to a threaded rod 17. The end of the threaded rod 17 away from the locking block 15 passes through the side wall of the expansion groove 16 and is fixedly connected to a locking knob 9. Specifically, the locking knob 9 drives the threaded rod 17 to rotate, so that the side wall of the locking block 15 is separated from the adjustment shaft 13. At this time, the adjustment shaft 13 can be rotated. When the locking knob 9 is rotated and the locking block 15 is pressed against the side wall of the adjustment shaft 13 by the threaded rod 17, the rotation of the adjustment shaft 13 is restricted to achieve the purpose of locking.

[0024] Furthermore, the locking block 15 of the utility model is provided with an arc surface matching the adjusting shaft 13 on one side close to the adjusting shaft 13 and a friction strip 18 is fixedly connected to the arc surface. Specifically, the arc surface can better fit the side wall of the adjusting shaft 13, and the friction strip 18 increases the friction between the arc surface and the adjusting shaft 13, thereby improving the locking effect.

[0025] Working principle: First, rotate the locking knob 9 to make the locking block 15 withdraw outward and disengage from the side wall of the adjusting shaft 13. At this time, rotate the adjusting knob 7 to drive the lead screw 5 to rotate, thereby driving the slider 4 to move up and down to adjust the height of the headrest 2. After the height adjustment is completed, rotate the locking knob 9 again. When the locking block 15 is pressed against the side wall of the adjusting shaft 13 through the threaded rod 17, the rotation of the adjusting shaft 13 is restricted to achieve the purpose of locking.

[0026] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. An ergonomic leisure chair with a liftable headrest, comprising a backrest and a headrest, characterized in that: A lifting mechanism that cooperates with the headrest is provided inside the backrest. The lifting mechanism includes a mounting groove opened on the inner side of the backrest, a sliding groove connected and communicated with one side of the mounting groove, a fixing member slidably placed inside the sliding groove, a slider fixedly connected to one side of the fixing member, and a lead screw rotatably arranged inside the mounting groove. The slider is sleeved on the outer side of the lead screw and forms a threaded drive with the lead screw. The headrest is fixedly connected to the side of the fixing member away from the slider. A regulating shaft is coaxially fixedly connected to the bottom end of the lead screw. The regulating shaft is connected with a driving assembly and a locking assembly. An expansion groove that cooperates with the driving assembly and the locking assembly is opened at the bottom of the mounting groove.

2. The ergonomic leisure chair with a liftable headrest according to claim 1, characterized in that: The driving assembly includes a driven bevel gear coaxially fixedly connected to the regulating shaft, a rotating rod rotatably arranged on the side wall of the expansion groove, and a driving bevel gear fixedly connected to one end of the rotating rod and meshing with the driven bevel gear. The end of the rotating rod away from the driving bevel gear penetrates through the side wall of the expansion groove and is fixedly connected with an adjusting knob.

3. The ergonomic leisure chair with a liftable headrest according to claim 1, characterized in that: The locking assembly includes a locking sleeve fixedly connected to the inner wall of the expansion groove and rotatably connected to the regulating shaft, and a locking block that cooperates with the locking sleeve. The locking sleeve is an annular plate body with an opening on one side, and guide plates are symmetrically fixedly connected to both sides of the opening. The locking block is slidably placed between the guide plates, and a threaded rod is rotatably connected to the locking block. The end of the threaded rod away from the locking block penetrates through the side wall of the expansion groove and is fixedly connected with a locking knob.

4. The ergonomic leisure chair with a liftable headrest according to claim 3, characterized in that: An arc surface that cooperates with the regulating shaft is provided on the side of the locking block close to the regulating shaft, and a friction strip is fixedly connected to the arc surface.

5. The ergonomic leisure chair with a liftable headrest according to claim 1, characterized in that: The shape of the mounting groove matches that of the slider. The outer side of the slider closely adheres to the inner wall of the mounting groove and is slidably connected to the mounting groove.

6. The ergonomic leisure chair with a liftable headrest according to claim 1, characterized in that: The fixing member is a U-shaped plate body and is symmetrically provided with two. The fixing member is fixedly connected to the headrest and the slider by bolts.

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