An office chair having an adjustable headrest structure

Abstract

This utility model belongs to the field of office chair technology, specifically relating to an office chair with an adjustable headrest structure. It includes a backrest support, a headrest support slidably connected to the backrest support, and a headrest structure. The headrest support includes an extension plate slidably connected to the back of the backrest support, and a fixing protrusion on the side of the extension plate facing away from the backrest support. The headrest structure includes a hanging strap, an opening at one end of the hanging strap that engages with the fixing protrusion, and a headrest body at the other end of the hanging strap. The headrest body includes a fixing block and a support block connected to the hanging strap. The fixing block has two mutually perpendicular support surfaces and an inclined mounting surface for connecting to the support block. This utility model optimizes the backrest and headrest structures to reduce the height of the backrest when the headrest is not in use, allowing the overall height of the office chair to remain at a level comparable to the height of the desk, thus enhancing a clean and efficient visual effect.

Description

Technical Field

[0001] This utility model belongs to the field of office chair technology, specifically relating to an office chair with an adjustable headrest structure. Background Technology

[0002] Office chairs are specifically designed for use in office environments, aiming to provide comfort and functionality to meet the needs of prolonged seated work. Office chairs are not only suitable for office environments but are also widely used in open-plan offices, meeting rooms, reading rooms, libraries, training rooms, laboratories, staff dormitories, staff canteens, and many other settings. Most office chairs currently available generally consist of a movable frame, seat, backrest, armrests, headrest, and lumbar support. The headrest's functional requirements necessitate a sufficiently high backrest, resulting in a large packaging size for office chairs, making them inconvenient for transportation.

[0003] The patent document CN222584034U discloses an office chair, including a seat cushion, detachable armrests on both sides of the seat cushion, a detachable backrest on the back of the seat cushion, a detachable lumbar support on the lower front side of the backrest, a detachable headrest on the upper side of the backrest, and a support assembly detachably mounted on the bottom of the seat cushion; a mounting bracket for connecting the backrest and the seat cushion is provided on the rear side of the seat cushion. This device achieves the effect of detachable connection of the mounting bracket, seat cushion, support assembly, headrest, and backrest, significantly reducing the required packaging volume of the office chair.

[0004] However, the device still has at least the following problems: In actual use, the headrest is generally needed, and even if the unused headrest is removed, the high backrest still makes the office chair take up a lot of space, which does not meet the simple visual effect pursued by the office. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this utility model is to provide an office chair with an adjustable headrest structure. By optimizing the backrest and headrest structures, the height of the backrest when the headrest is not in use is reduced, so that the overall height of the office chair can be kept at a level comparable to the height of the desk, thereby enhancing the clean and efficient visual effect.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] An office chair with an adjustable headrest structure includes a backrest support, a headrest support slidably connected to the backrest support, and a headrest structure detachably connected to the headrest support. The headrest support includes an extension plate slidably connected to the back of the backrest support and a fixing protrusion disposed on a side surface of the extension plate opposite to the backrest support. The headrest structure includes a hanging strap, an opening disposed at one end of the hanging strap and engaging with the fixing protrusion, and a headrest body disposed at the other end of the hanging strap. The headrest body includes a fixing block and a support block connected to the hanging strap. The fixing block has two mutually perpendicular support surfaces and an mounting ramp for connecting to the support block.

[0008] As a further preferred embodiment of this utility model, there are multiple fixed protrusions, which are spaced apart along the sliding direction of the extension plate; the fixed protrusions form at least one high adjustment point and one low adjustment point, and when the hanging strap is connected to the high adjustment point, both of the support surfaces simultaneously abut against the upper surface of the back support and the surface of the extension plate near the back support; when the hanging strap is connected to the low adjustment point, one of the support surfaces abuts against the surface of the extension plate near the back support, and there is a gap between the other support surface and the upper surface of the back support.

[0009] As a further preferred embodiment of this invention, the side of the support block away from the fixed block has an arc-shaped support surface.

[0010] As a further preferred embodiment of this utility model, when the hanging strap is connected to the high adjustment point, the arc-shaped support surface has two forms: either facing away from or towards the back support.

[0011] As a further preferred embodiment of the present invention, when the hanging strap is connected to the high adjustment point, one of the supporting surfaces can also abut against the surface of the extension plate away from the back support.

[0012] As a further preferred embodiment of this utility model, the back support is provided with a sliding groove, and at least two fixing screw holes distributed along the sliding direction of the extension plate are provided on the bottom surface of the sliding groove or on the surface of the back support located on one side of the sliding groove; a slider slidably connected in the sliding groove and a positioning hole matching the fixing screw hole are provided on the surface of the extension plate; the fixing screw hole and the positioning hole are connected by fixing bolts.

[0013] As a further preferred embodiment of this invention, the height of the groove is less than or equal to the height of the extension plate.

[0014] As a further preferred embodiment of the present invention, the upper end of the extension plate is formed with an arc-shaped protrusion.

[0015] As a further preferred embodiment of this utility model, the hanging strap is a flexible strap.

[0016] As a further preferred embodiment of this utility model, the surface of the hanging strap is provided with a hook-faced strap, and the fixing block is provided with an annular strap that matches the hook-faced strap.

[0017] The beneficial effects of this utility model are:

[0018] This utility model achieves the effect of storage and concealment when not in use by setting up a headrest bracket and headrest structure, reducing space occupation, making the office chair present a simple line, and greatly improving the aesthetics of the office chair.

[0019] This invention, through the design of the headrest structure, can meet the adjustment of different heights and angles, making it fit the neck curve of different users and greatly improving the comfort of the office chair. Attached Figure Description

[0020] Appendix Figure 1 This is a structural schematic diagram of the office chair of this utility model.

[0021] Appendix Figure 2 This is a schematic diagram of the connection structure between the backrest support and the headrest support of this utility model.

[0022] Appendix Figure 3 This is a schematic diagram of the headrest structure of this utility model.

[0023] Appendix Figure 4 This is a schematic diagram of one form of the headrest structure of this utility model.

[0024] Appendix Figure 5 This is a schematic diagram of another form of the headrest structure of this utility model.

[0025] Appendix Figure 6 This is a schematic diagram of another form of the headrest structure of this utility model.

[0026] Appendix Figure 7 This is a schematic diagram of another form of the headrest structure of this utility model.

[0027] Attached diagram descriptions: 1. Backrest support; 2. Headrest support; 3. Headrest structure; 4. Base.

[0028] 11. Slide groove; 12. Fixing screw hole; 13. Fixing bolt; 14. Soft backrest;

[0029] Extension plate 21, fixing protrusion 22;

[0030] Slider 211, positioning hole 212, arc-shaped protrusion 213;

[0031] Hanging strap 31, opening 32, headrest body 33;

[0032] Fixed block 331, support block 332;

[0033] Support surface 3311, mounting slope 3312;

[0034] Arc-shaped support surface 3321. Detailed Implementation

[0035] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component 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.

[0036] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] As attached Figure 1 ~Appendix Figure 7 As shown, this embodiment provides an office chair with an adjustable headrest structure, including a backrest support 1, a headrest support 2 slidably connected to the backrest support 1, and a headrest structure 3 detachably connected to the headrest support 2. In addition, it should also include a base 4 for mounting the backrest support 1, armrests, caster legs, and other conventional structures. A backrest cushion 14 should be provided on the front of the backrest support 1 to enhance comfort. These structures are not part of the structural modification direction of this embodiment, and therefore will not be described in detail here.

[0039] In this embodiment, the headrest support 2 includes an extension plate 21 slidably connected to the back of the backrest support 1, and a fixing protrusion 22 disposed on the side surface of the extension plate 21 opposite to the backrest support 1; the headrest structure 3 includes a hanging strap 31, an opening 32 disposed on one end of the hanging strap 31 and engaged with the fixing protrusion 22, and a headrest body 33 disposed on the other end of the hanging strap 31; the headrest body 33 includes a fixing block 331 and a support block 332 connected to the hanging strap 31, the fixing block 331 having two mutually perpendicular support surfaces 3311 and an mounting inclined surface 3312 for connecting with the support block 332.

[0040] The specific structure for achieving the sliding connection between the extension plate 21 and the back support 1 can be as follows: a sliding groove 11 is provided on the back support 1, and at least two fixing screw holes 12 distributed along the sliding direction of the extension plate 21 are provided on the bottom surface of the groove 11 or on the surface of the back support 1 located on one side of the groove 11; a slider 211 slidably connected in the sliding groove 11 and a positioning hole 212 matching the fixing screw holes 12 are provided on the surface of the extension plate 21; the fixing screw holes 12 and the positioning holes 212 are connected by fixing bolts 13. The height of the sliding groove 11 is less than or equal to the height of the extension plate 21. The slider 211 is preferably located at the lower end of the extension plate 21, and the first fixing screw hole 12 should match the positioning hole 212 when the slider 211 is located at the lower end of the slide groove 11, and the second fixing screw hole 12 should match the positioning hole 212 when the slider 211 is located at the upper end of the slide groove 11. By setting the upper and lower fixing screw holes 12, the extension plate 21 can be fixed at the lowest and highest positions. At the lowest position, it is in the stored state when the headrest structure 3 is not used. At this time, the extension plate 21 can completely cover the slide groove 11 to play a blocking role. At the highest position, it is in the unfolded state when the headrest structure 3 is used. It is worth noting that when the extension plate 21 is at its highest point, most of the area of ​​the extension plate 21 does not contact the back support 1. Therefore, the support strength of the extension plate 21 will be reduced. However, since the hanging strap 31 in the headrest structure 3 is fixed by wrapping around the back of the extension plate 21 to the front, when the head applies force to the headrest structure 3, the hanging strap 31 will generate a force that brings the extension plate 21 closer to the back support 1, thereby supplementing the support strength of the extension plate 21.

[0041] The support surface 3311 and the mounting slope 3312 form a triangular-like shape for the base of the fixing block 331. When the right-angled sides of the triangle (i.e., the two support surfaces 3311) abut against the upper surface of the backrest bracket 1 and the front of the extension plate 21 respectively, the fixing block 331 will not slip, ensuring sufficient support for the support block 332. The support block 332 is mounted on the mounting slope 3312, which allows it to have a certain slope, more effectively conforming to the curve of the human neck and improving comfort. Furthermore, the side of the support block 332 away from the fixing block 331 forms an arc-shaped support surface 3321 to further enhance comfort.

[0042] It is understood that the hanging strap 31 is a flexible strap, which can be made of common materials such as fabric or leather; the fixing block 331 and the support block 332 can be made of common materials such as high-density sponge, and the two can be connected by conventional methods such as adhesive bonding. Furthermore, to improve the aesthetics, a sleeve can be attached to the outer side of both. Moreover, the hanging strap 31 has a hook-and-loop surface, and the fixing block 331 has a loop surface that matches the hook-and-loop surface. The fixing block 331 and the hanging strap 31 can be detachably connected via Velcro. These features are well-known in the art and will not be elaborated further.

[0043] In this embodiment, an arc-shaped protrusion 213 is formed at the upper end of the extension plate 21. This is designed to reduce wear between the mounting strap 31 and the extension plate 21.

[0044] In this embodiment, there are multiple fixed protrusions 22, which are distributed at intervals along the sliding direction of the extension plate 21. The fixed protrusions 22 form at least one high adjustment point and one low adjustment point. When the hanging strap 31 is connected to the high adjustment point, the two support surfaces 3311 simultaneously abut against the upper surface of the back support 1 and the surface of the extension plate 21 near the back support 1. When the hanging strap 31 is connected to the low adjustment point, one support surface 3311 abuts against the surface of the extension plate 21 near the back support 1, and there is a gap between the other support surface 3311 and the upper surface of the back support 1.

[0045] The "high adjustment point and low adjustment point" refer to the higher and lower positions of the fixed protrusions 22 distributed along the sliding direction of the extension plate 21. When the opening 32 is connected to different fixed protrusions 22, the position of the hanging strap 31 is fixed, thus making the fixed position of the headrest body 33 have a higher and lower position. At this time, the higher position corresponds to the low adjustment point, and the lower position corresponds to the high adjustment point. The adjustment of the headrest body 33 at different heights can accommodate users with different sitting heights, providing a suitable headrest support height and improving the practicality of this device.

[0046] In this embodiment, when the mounting strap 31 is connected to the high adjustment point, the arc-shaped support surface 3321 has two forms: either facing away from or towards the back of the support 1. (See attached diagram) Figure 4 and attached Figure 6 As shown, the arc-shaped support surface 3321 facing away from the backrest bracket 1 means that the arc-shaped support surface 3321 is facing upwards. At this time, one of the two support surfaces 3311 abuts against the extension plate 21, and the other abuts against the upper surface of the backrest bracket 1 or is parallel to it at a certain distance. The arc-shaped support surface 3321 facing the backrest bracket 1 means that the arc-shaped support surface 3321 is facing downwards. At this time, one support surface 3311 abuts against the extension plate 21, and the other abuts against the backrest bracket 1 is a part of the arc-shaped support surface 3321. This shape can be achieved by flipping the headrest body 33. The purpose is to adjust the support angle of the arc-shaped support surface 3321 to meet different user needs and improve the practicality of the device.

[0047] In this embodiment, when the mounting strap 31 is connected to the high adjustment point, one of the support surfaces 3311 can also abut against the surface of the extension plate 21 away from the back support 1. (See attached...) Figure 7 As shown, this state corresponds to the storage state of the extension plate 21. At this time, the headrest body 33 can be fixed to the back of the extension plate 21, which can hide it from the front and improve the overall aesthetics of the office chair.

[0048] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An office chair with an adjustable headrest structure, characterized in that: The device includes a backrest support (1), a headrest support (2) slidably connected to the backrest support (1), and a headrest structure (3) detachably connected to the headrest support (2). The headrest support (2) includes an extension plate (21) slidably connected to the back of the backrest support (1) and a fixing protrusion (22) disposed on the side surface of the extension plate (21) facing away from the backrest support (1). The headrest structure (3) includes a hanging strap (31), an opening (32) disposed on one end of the hanging strap (31) and engaged with the fixing protrusion (22), and a headrest body (33) disposed on the other end of the hanging strap (31). The headrest body (33) includes a fixing block (331) and a support block (332) connected to the hanging strap (31). The fixing block (331) has two mutually perpendicular support surfaces (3311) and an mounting slope (3312) for connecting with the support block (332).

2. An office chair with an adjustable headrest structure according to claim 1, characterized in that: There are multiple fixed protrusions (22), which are distributed at intervals along the sliding direction of the extension plate (21); the fixed protrusions (22) form at least one high adjustment point and a low adjustment point, and when the hanging strap (31) is connected to the high adjustment point, the two support surfaces (3311) simultaneously abut against the upper surface of the back support (1) and the surface of the extension plate (21) near the back support (1); when the hanging strap (31) is connected to the low adjustment point, one support surface (3311) abuts against the surface of the extension plate (21) near the back support (1), and there is a gap between the other support surface (3311) and the upper surface of the back support (1).

3. An office chair with an adjustable headrest structure according to claim 2, characterized in that: The support block (332) has an arc-shaped support surface (3321) on the side away from the fixed block (331).

4. An office chair with an adjustable headrest structure according to claim 3, characterized in that: When the mounting strap (31) is connected to the high adjustment point, the arc-shaped support surface (3321) has two forms: facing away from or towards the back support (1).

5. An office chair with an adjustable headrest structure according to claim 2, characterized in that: When the mounting strap (31) is connected to the high adjustment point, one of the support surfaces (3311) can also abut against the extension plate (21) away from the surface of the back support (1).

6. An office chair with an adjustable headrest structure according to claim 1, characterized in that: The back support (1) is provided with a sliding groove (11), and at least two fixing screw holes (12) distributed along the sliding direction of the extension plate (21) are provided on the bottom surface of the sliding groove (11) or on the surface of the back support (1) located on one side of the sliding groove (11); the surface of the extension plate (21) is provided with a slider (211) slidably connected in the sliding groove (11) and a positioning hole (212) matching the fixing screw hole (12); the fixing screw hole (12) and the positioning hole (212) are connected by fixing bolts (13).

7. An office chair with an adjustable headrest structure according to claim 6, characterized in that: The height of the groove (11) is less than or equal to the height of the extension plate (21).

8. An office chair with an adjustable headrest structure according to claim 1, characterized in that: An arc-shaped protrusion (213) is formed at the upper end of the extension plate (21).

9. An office chair with an adjustable headrest structure according to claim 1, characterized in that: The mounting belt (31) is a flexible belt.

10. An office chair with an adjustable headrest structure according to claim 1, characterized in that: The surface of the hanging strap (31) is provided with a hook surface, and the fixing block (331) is provided with a ring surface that matches the hook surface.

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