An office chair with an adjustable headrest

Abstract

This application relates to the field of office chair technology, and in particular to an adjustable headrest office chair, including an office chair body and a headrest body. A mounting seat is provided on the upper part of the backrest of the office chair body, and a swing arm is hinged to the mounting seat above the backrest. The mounting seat is provided with a first adjustment component that adjusts the lower part of the swing arm to rotate relative to the mounting seat. A hinge seat is provided on the rear side of the headrest body, and the upper part of the swing arm is hinged to the hinge seat. The hinge seat is provided with a second adjustment component that adjusts the upper part of the swing arm to rotate relative to the hinge seat. This application has the effect of improving the support comfort of the headrest.

Description

Technical Field

[0001] This application relates to the field of office chair technology, and in particular to an office chair with an adjustable headrest. Background Technology

[0002] An office needs to be equipped with many office supplies, including office chairs and desks. Office chairs are generally height-adjustable and easy to use.

[0003] When office chairs are in use, the backrest and headrest are generally provided. In the current technology, the headrest of office chairs cannot meet the needs of users of different body types. During use, due to the different body shapes and neck depths of each person, the headrest often does not provide adequate support, resulting in low headrest support comfort. Therefore, further improvement is needed. Utility Model Content

[0004] To improve the support and comfort of the headrest, this application provides an office chair with an adjustable headrest.

[0005] The technical solution for an adjustable headrest office chair provided in this application is as follows: An adjustable headrest office chair includes an office chair body and a headrest body. The upper part of the backrest of the office chair body is provided with a mounting seat, and a swing arm located above the backrest is hinged to the mounting seat. The mounting seat is provided with a first adjustment component that adjusts the lower part of the swing arm to rotate relative to the mounting seat. A hinge seat is provided on the rear side of the headrest body, and the upper part of the swing arm is hinged to the hinge seat. The hinge seat is provided with a second adjustment component that adjusts the upper part of the swing arm to rotate relative to the hinge seat.

[0006] By adopting the above technical solution, the relative position of the headrest body and the backrest can be coarsely adjusted by adjusting the overall swing angle of the swing arm through the first adjustment component. The swing angle of the headrest body can also be adjusted through the second adjustment component to achieve fine adjustment of the headrest body's backrest, so as to meet the usage needs of users of different body types and improve the comfort of headrest support.

[0007] Preferably, connecting blocks are fixedly connected to both sides of the upper end face of the mounting base, and a lower hinge protrusion located between the two connecting blocks is fixedly protruding from the lower end of the swing arm. The lower hinge protrusion is fixedly connected to a lower hinge shaft rotatably connected to the connecting blocks.

[0008] By adopting the above technical solution, the connecting block cooperates with the lower hinge protrusion and the lower hinge shaft to realize the hinge between the lower end of the swing arm and the mounting base, so that the swing arm can rotate relative to the mounting base.

[0009] Preferably, the two connecting blocks have lower rotating grooves on their opposite sidewalls, the lower hinge shaft is rotatably inserted into the lower rotating groove, and one end of the lower hinge shaft has a stop groove coaxially formed. The cross-section of the stop groove is a regular polygon. The first adjustment component includes a stop button that is slidably connected to the inner wall of the lower rotating groove of one of the connecting blocks, an elastic element that is built into the lower rotating groove and forces the stop button to be embedded in the stop groove under normal conditions, thereby restricting the rotation of the lower hinge shaft relative to the connecting block, and a drive rod that drives the stop button to slide out of the stop groove.

[0010] By adopting the above technical solution, under normal conditions, the elastic element causes the stop button to be embedded in the stop groove and the hinge shaft to rotate, ensuring the stability of the headrest body during use. The stop button is driven by the drive rod to slide out of the stop groove, and the lower part of the adjustable arm can rotate relative to the mounting seat, thereby adjusting the relative position of the headrest body and the backrest.

[0011] Preferably, the elastic element is a spring built into the lower rotating groove, with one end of the spring fixedly connected to the inner wall of the lower rotating groove and the other end of the spring fixedly connected to the stop button.

[0012] By adopting the above technical solution, one end of the spring built into the lower rotating groove is connected to the inner wall of the lower rotating groove, and the other end is connected to the stop button. Under normal conditions, the stop button can be forced into the stop groove of the lower hinge shaft, thereby limiting the rotation of the lower hinge shaft relative to the connecting block and fixing the rotation angle of the lower part of the swing arm relative to the mounting seat. When it is necessary to adjust the angle of the lower part of the swing arm, the external force overcomes the spring force to make the stop button disengage from the stop groove, and the rotation adjustment can be carried out. After the adjustment is completed, the spring can reset the stop button to be embedded, ensuring the stability and convenience of the adjustment.

[0013] Preferably, the outer side wall of the other connecting block is provided with a sliding groove, and the first adjustment component also includes a button that is slidably connected to the sliding groove. One end of the drive rod is coaxially fixedly connected to the button, the drive rod is coaxially rotatably passed through the lower hinge shaft, and the other end of the drive rod is coaxially fixedly connected to the stop button.

[0014] By adopting the above technical solution, pressing the button causes the drive rod to slide the stop button out of the stop groove, thereby releasing the restriction on the rotation of the lower hinge shaft and enabling the lower part of the swing arm to rotate relative to the mounting base. After releasing the button, the elastic element can cause the stop button to re-enter the stop groove, restricting the rotation of the lower hinge shaft, making operation convenient.

[0015] Preferably, the hinge seat has an upper hinge protrusion fixedly protruding, the upper end of the swing arm has a connecting groove for the upper hinge protrusion to rotatably connect, the upper outer side wall of the swing arm has an upper rotating groove communicating with the connecting groove, and the upper hinge protrusion is fixedly connected to an upper hinge shaft that rotatably passes through the upper rotating groove.

[0016] By adopting the above technical solution, the upper rotating groove cooperates with the upper hinge protrusion and the lower hinge shaft to realize the hinge connection between the upper end of the swing arm and the hinge seat.

[0017] Preferably, the second adjustment component includes a screw threaded into the upper hinge shaft and a knob coaxially fixed to the screw, with the end face of the knob abutting against the outer wall of the swing arm.

[0018] By adopting the above technical solution, loosening the screw allows the knob to disengage from the outer wall of the swing arm, thereby adjusting the relative rotation between the hinge seat and the swing arm. After adjustment, tightening the screw causes the end face of the knob to press against the outer wall of the swing arm, thereby limiting the rotation of the upper hinge shaft in a damping manner.

[0019] In summary, this utility model has the following beneficial effects: 1. By adjusting the overall swing angle of the swing arm through the first adjustment component, the relative position of the headrest body and the backrest can be coarsely adjusted. The swing angle of the headrest body can also be adjusted through the second adjustment component to achieve fine adjustment of the headrest body and the backrest, so as to meet the usage needs of users of different body types and improve the comfort of headrest support. 2. Under normal conditions, the elastic element causes the stop button to be embedded in the stop groove and the hinge shaft to rotate, ensuring the stability of the headrest body during use. The stop button is driven by the drive rod to slide out of the stop groove, allowing the lower part of the swing arm to rotate relative to the mounting base, thereby adjusting the relative position of the headrest body and the backrest. 3. Loosen the screw to disengage the knob from the outer wall of the swing arm, which will adjust the relative rotation between the hinge seat and the swing arm. After adjustment, tighten the screw so that the end face of the knob is pressed against the outer wall of the swing arm, thereby limiting the rotation of the upper hinge shaft in a damping manner. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an adjustable headrest office chair in Embodiment 1; Figure 2 This is a schematic diagram of the connection structure of the headrest body in Embodiment 1; Figure 3 This is a schematic diagram of the structure of the first adjustment component in Embodiment 1; Figure 4 This is a schematic diagram of the connection structure between the hinge seat and the swing arm in Embodiment 1; Figure 5 This is a schematic diagram of the connection structure between the hinge seat and the support rod in Embodiment 2.

[0021] In the diagram, 10 is the office chair body; 20 is the headrest body; 201 is the support rod; 1 is the mounting base; 11 is the connecting block; 12 is the lower rotating groove; 13 is the sliding groove; 14 is the anti-rotation groove; 2 is the swing arm; 21 is the lower hinge protrusion; 22 is the lower hinge shaft; 23 is the stop groove; 24 is the connecting groove; 25 is the upper rotating groove; 3 is the hinge seat; 31 is the upper hinge protrusion; 32 is the upper hinge shaft; 33 is the set screw; 4 is the first adjustment component; 41 is the stop button; 42 is the spring; 43 is the drive rod; 44 is the button; 45 is the sliding protrusion; 5 is the second adjustment component; 51 is the screw; 52 is the knob. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0023] Example 1: This application discloses an office chair with an adjustable headrest, as shown in the embodiments below. Figure 1 , Figure 2 The chair includes an office chair body 10 and a headrest body 20. The backrest of the office chair body 10 is provided with a mounting seat 1. In this embodiment, the mounting seat 1 is fixedly connected to the backrest.

[0024] Reference Figure 2 , Figure 3 The mounting base 1 is hinged to a swing arm 2 located above the backrest. Specifically, connecting blocks 11 are fixedly connected to both sides of the upper end face of the mounting base 1. The opposite sidewalls of the two connecting blocks 11 are provided with lower rotation grooves 12. The lower end of the swing arm 2 protrudes and is fixedly provided with a lower hinge protrusion 21 located between the two connecting blocks 11. A lower hinge shaft 22 is fixedly inserted through the lower hinge protrusion 21 and is rotatably inserted into the lower rotation groove 12. A stop groove 23 is coaxially provided at one end of the lower hinge shaft 22. The cross-section of the stop groove 23 is a regular polygon.

[0025] Mounting base 1 is provided with a first adjustment component 4 for adjusting the lower part of the swing arm 2 to rotate relative to mounting base 1. In this embodiment, the first adjustment component 4 includes a stop button 41 slidably connected to the inner wall of the lower rotation groove 12 of one of the connecting blocks 11, an elastic element built into the lower rotation groove 12 and normally forcing the stop button 41 to be embedded in the stop groove 23 to restrict the rotation of the lower hinge shaft 22 relative to the connecting block 11, a drive rod 43 for driving the stop button 41 to slide out of the stop groove 23, and a button 44 slidably inserted into the other connecting block 11. Specifically, the cross-section of the stop button 41 is a regular polygon, the elastic element is a spring 42 built into the lower rotation groove 12, one end of the spring 42 is fixedly connected to the inner wall of the lower rotation groove 12, and the other end of the spring 42 is fixedly connected to the stop button 41. Another connecting block 11 has a sliding groove 13 on its outer side wall. The button 44 is slidably inserted into the sliding groove 13. The inner wall of the sliding groove 13 has an anti-rotation groove 14. The outer wall of the button 44 has a protruding sliding protrusion 45 that is slidably connected to the anti-rotation groove 14. One end of the drive rod 43 is coaxially fixedly connected to the button 44. The drive rod 43 is coaxially rotatably inserted through the lower hinge shaft 22. The other end of the drive rod 43 is coaxially fixedly connected to the stop button 41.

[0026] Reference Figure 2 , Figure 4 A support rod 201 is fixedly connected to the middle of the rear side of the headrest body 20. The support rod 201 is provided with a hinge seat 3. In this embodiment, the hinge seat 3 is fixedly sleeved on the support rod 201. The upper part of the swing arm 2 is hinged to the hinge seat 3. Specifically, the hinge seat 3 has an upper hinge protrusion 31 fixedly protruding. The middle of the upper end of the swing arm 2 is provided with a connecting groove 24 for the upper hinge protrusion 31 to rotate. The upper outer wall of the upper part of the swing arm 2 is provided with an upper rotation groove 25 communicating with the connecting groove 24. The upper hinge protrusion 31 is fixedly connected with an upper hinge shaft 32 that rotates through the upper rotation groove 25. The hinge seat 3 is provided with a second adjustment component 5 for adjusting the rotation of the upper part of the swing arm 2 relative to the hinge seat 3. In this embodiment, the second adjustment component 5 includes a screw 51 threaded into the upper hinge shaft 32 and a knob 52 coaxially fixedly connected to the screw 51. The end face of the knob 52 abuts against the outer wall of the swing arm 2.

[0027] The implementation principle of an adjustable headrest office chair according to this application embodiment is as follows: By pressing the button 44, the drive rod 43 drives the stop button 41 to slide out of the stop groove 23. At this time, the spring 42 undergoes elastic deformation and has elastic potential energy, which releases the restriction on the rotation of the lower hinge shaft 22. This forces the upper part of the swing arm 2 to rotate around the axis of the lower hinge shaft 22, thereby making a rough adjustment to the relative position of the headrest body 20 and the backrest. After the adjustment is completed, the button 44 is released, and the stop button 41 slides back into the stop groove 23 under the action of the spring 42. Furthermore, by loosening the screw 51 to disengage the knob 52 from the outer wall of the swing arm 2, the relative rotation of the hinge seat 3 and the swing arm 2 can be adjusted, allowing for fine adjustments to the headrest of the headrest body 20. After adjustment, tightening the screw 51 causes the end face of the knob 52 to press against the outer wall of the swing arm 2, thereby limiting the rotation of the upper hinge shaft 32 in a damping manner.

[0028] Example 2: The difference from Example 1 is that, referring to Figure 5 The hinge seat 3 is slidably sleeved on the support rod 201. The outer wall of the hinge seat 3 is threaded with a set screw 33 that abuts against the support rod 201. After the hinge seat 3 slides and adjusts its position on the support rod 201, the sliding position of the hinge seat 3 is fixed by tightening the set screw 33, which further improves the adjustment flexibility of the headrest body 20.

[0029] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An office chair with an adjustable headrest, characterized in that: The chair includes an office chair body (10) and a headrest body (20). The backrest of the office chair body (10) is provided with a mounting seat (1). The mounting seat (1) is hinged to a swing arm (2) located above the backrest. The mounting seat (1) is provided with a first adjustment component (4) that adjusts the lower part of the swing arm (2) to rotate relative to the mounting seat (1). The rear side of the headrest body (20) is provided with a hinge seat (3). The upper part of the swing arm (2) is hinged to the hinge seat (3). The hinge seat (3) is provided with a second adjustment component (5) that adjusts the upper part of the swing arm (2) to rotate relative to the hinge seat (3).

2. The adjustable headrest office chair according to claim 1, characterized in that: The upper end face of the mounting base (1) is fixedly connected to both sides of the connecting block (11), and the lower end of the swing arm (2) is fixedly connected to the lower hinge protrusion (21) located between the two connecting blocks (11). The lower hinge protrusion (21) is fixedly connected to the lower hinge shaft (22) rotatably connected to the connecting block (11).

3. The adjustable headrest office chair according to claim 2, characterized in that: The two connecting blocks (11) have lower rotating grooves (12) on their opposite sidewalls. The lower hinge shaft (22) is rotatably inserted into the lower rotating groove (12). One end of the lower hinge shaft (22) is coaxially provided with a stop groove (23). The cross-section of the stop groove (23) is a regular polygon. The first adjustment component (4) includes a stop button (41) that is slidably connected to the inner wall of the lower rotating groove (12) of one of the connecting blocks (11), an elastic element that is built into the lower rotating groove (12) and forces the stop button (41) to be embedded in the stop groove (23) under normal conditions, thereby restricting the rotation of the lower hinge shaft (22) relative to the connecting block (11), and a drive rod (43) that drives the stop button (41) to slide out of the stop groove (23).

4. The adjustable headrest office chair according to claim 3, characterized in that: The elastic element is a spring (42) built into the lower rotating groove (12). One end of the spring (42) is fixedly connected to the inner wall of the lower rotating groove (12), and the other end of the spring (42) is fixedly connected to the stop button (41).

5. The adjustable headrest office chair according to claim 3, characterized in that: Another connecting block (11) has a sliding groove (13) on its outer side wall. The first adjustment component (4) also includes a button (44) that is slidably connected to the sliding groove (13). One end of the drive rod (43) is coaxially fixedly connected to the button (44). The drive rod (43) is coaxially rotatably inserted through the lower hinge shaft (22). The other end of the drive rod (43) is coaxially fixedly connected to the stop button (41).

6. The adjustable headrest office chair according to claim 1, characterized in that: The hinge seat (3) has an upper hinge protrusion (31) fixedly protruding. The upper end of the swing arm (2) is provided with a connecting groove (24) for the upper hinge protrusion (31) to be rotatably connected. The upper outer side wall of the swing arm (2) is provided with an upper rotating groove (25) that communicates with the connecting groove (24). The upper hinge protrusion (31) is fixedly connected with an upper hinge shaft (32) that rotatably passes through the upper rotating groove (25).

7. The adjustable headrest office chair according to claim 6, characterized in that: The second adjustment component (5) includes a screw (51) threaded into the upper hinge shaft (32) and a knob (52) coaxially fixedly connected to the screw (51), with the end face of the knob (52) abutting against the outer wall of the swing arm (2).

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