Office chair with adjustable headrest and backrest

Abstract

The present invention discloses an office chair with adjustable headrest and backrest, and relates to the technical field of office chairs. The office chair comprises a seat and a backrest, wherein the seat comprises a seat cushion and a support bracket, and further comprises an adjustment device fixed on the seat and movably connected to the backrest for adjusting the angle between the backrest and the seat, wherein the adjustment device comprises two sets of arc adjustment plates symmetrically fixed at the edge of the seat, a fixed adjustment shaft arranged on the backrest and installable on the adjustment plate, and further comprises a telescopic rod hinged at one end on a support footrest and at the other end at the end position below the backrest for limiting the rotation of the backrest, and further comprises a headrest assembly arranged on the backrest, wherein the headrest assembly comprises a first headrest and a second headrest, and further comprises a plurality of headrest adjustment assemblies respectively used for installing and fixing the first headrest or the second headrest to the backrest. The present invention aims to provide an office chair that can relieve the pressure on the head and neck of users and is used to protect the head and neck health of urban white-collar workers.

Description

Technical Field

[0001] The invention relates to the technical field of office chairs, and in particular to an office chair with an adjustable headrest and a backrest. Background Art

[0002] Office chairs refer to various chairs that are used for the convenience of daily work and social activities. In a narrow sense, office chairs refer to the backrest chairs that people sit on when they are working on the desk in a sitting position. In a broad sense, office chairs refer to all chairs used in offices, including executive chairs, mid-shift chairs, reception chairs, staff chairs, conference chairs, visitor chairs, training chairs, etc.

[0003] The existing office chairs are mainly aimed at alleviating the waist fatigue of urban white-collar workers, so the focus is on the waist pad structure. In fact, when the user of the office chair works in front of the computer for a long time, not only the waist will be fatigued and damaged. Because the user needs to maintain a fixed posture for a long time during work, the entire body trunk of the user will be under great pressure, and the two positions that are most significantly stressed are the neck and waist. Compared with the waist, the neck of the user will also be at risk of fatigue damage due to the long-term pressure of the human head. The common headrest structures on the market are mostly arc-surfaced long strip structures. When used on the head and neck of the worker, it can fit the user's neck position, and when the user is in a reclining or lying resting state, it can better relieve the user's neck fatigue. However, when working in the office, it is impossible for the staff to work in a reclining or lying posture. The body trunk of the worker in the sitting posture is straight, and the head may be vertical or slightly tilted forward. In this state, the traditional headrest structure cannot share the neck pressure of the worker well. Summary of the invention

[0004] The present invention provides an office chair with an adjustable headrest and a backrest. The headrest structure used in the device is spherical, which can be respectively pressed against the back of the ears on both sides of the head of the worker, and the distance between the two headrests can be adjusted. Combined with the adjustment method in which the height and rotation angle of the backrest can be adjusted, the weight of the head can still be better shared when the worker is working, and the neck fatigue can be relieved, so as to solve the above technical problems.

[0005] The technical solution of the present invention to solve the above problems is: to provide an office chair with adjustable headrest and backrest, including a seat and a seat back, the seat including a seat cushion and a support bracket, and also including an adjustment device arranged and fixed on the seat and movably connected with the seat back for adjusting the angle between the seat back and the seat, the adjustment device including two groups of arc-shaped adjustment plates symmetrically fixed at the edge positions of the seat, a fixed adjustment shaft arranged on the seat back and installable on the adjustment plate, and also including a telescopic rod with one end hinged on the support foot frame and the other end hinged at the end position below the seat back for limiting the rotation of the seat back, and also including a headrest assembly arranged on the seat back, the headrest assembly including a first headrest and a second headrest, and also including a plurality of headrest adjustment assemblies respectively used for installing and fixing the first headrest or the second headrest to the chair back.

[0006] Preferably, the headrest adjustment assembly includes an angle rod having one end connected and fixed to the first headrest or the second headrest and the other end connected to the side position of the seat back, and also includes a stopper arranged at the end of the angle rod connected to the seat back and an externally threaded sleeve mounted on the angle rod.

[0007] Preferably, it also includes threaded connection holes arranged at both sides of the chair back for matching with externally threaded sleeves.

[0008] Preferably, the first headrest and the second headrest are both configured as spheres, and the seat back is also provided with an arc-shaped concave surface on which the first headrest and the second headrest can be placed simultaneously.

[0009] Preferably, the arc-shaped adjustment plate is provided with an arc-shaped sliding slot hole and a plurality of position-limiting rotation slot holes connected to the arc-shaped sliding slot hole.

[0010] Preferably, the telescopic rod is configured as a telescopic rod body in a multi-axis sleeve-jointed form.

[0011] Preferably, it also includes a plurality of insertion holes equidistantly arranged on the rod body of the telescopic rod, and also includes a pin that can be inserted into the insertion holes to limit the length of the telescopic rod.

[0012] Preferably, it also includes a lumbar cushion arranged at the connection between the seat and the backrest.

[0013] Beneficial effects of the present invention: an office chair with adjustable headrest and backrest, in which fixed adjustment shafts are arranged on both sides of the backrest, and the backrest is inserted into the arc-shaped adjustment plate of the adjustment device with the fixed adjustment shaft, so that the backrest can be rotated around the fixed adjustment shaft to achieve the function of adjusting the angle between the backrest and the seat. At the same time, the height of the backrest can be changed by changing the fixed adjustment shaft in different limit rotation slots, so that the backrest can be adapted to users of different heights and shapes. Most importantly, in the present device, the headrest assembly is arranged as a first headrest and a second headrest of a spherical structure, wherein the first headrest and the second headrest are respectively installed at the positions on both sides of the backrest, and the first headrest and the second headrest are also attached to the arc-shaped concave surface on the backrest, and there is a certain gap between the first headrest and the second headrest. Since the headrest is a spherical structure, when the user leans on the backrest, the head and neck can easily touch the headrest assembly, so that the headrest assembly can touch the positions on both sides of the head and neck, thereby forming a support point to share the weight of the head. As a headrest adjustment component, this structure can be used to connect and fix the headrest component to the chair back, and can also move the angle rod in the headrest adjustment component laterally by rotating the external threaded sleeve, so that the first headrest and the second headrest can both move laterally, so that the distance between the first headrest and the second headrest can be changed, so that the headrest component can better fit the user's head and neck. In this way, unless the user actively lowers his head, the headrest component can contact the user's head and neck to relieve neck pressure. In addition, the telescopic rod of the device is used to limit the further rotation of the chair back, that is to say: when the angular position of the chair back needs to be adjusted, after the chair back is rotated to a predetermined angle position, the length of the telescopic rod can be fixed by a pin to fix the angular position of the chair back at this time. The structure is relatively simple, and the telescopic rod can be set under the seat, which is better hidden. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. For those of ordinary skill in the art, other drawings can be obtained from these drawings without paying creative work.

[0015] Figure 1 It is a front view of a schematic diagram of the overall structure of an office chair with an adjustable headrest and a backrest according to a specific embodiment of the present invention;

[0016] Figure 2 A side view of a schematic diagram of the overall structure of an office chair with an adjustable headrest and a backrest according to a specific embodiment of the present invention;

[0017] Figure 3 The present invention is a schematic structural diagram of a first headrest of an office chair with an adjustable headrest and a backrest according to a specific embodiment of the present invention.

[0018] 1-seat, 11-seat cushion, 12-support bracket, 2-seat back, 21-fixed adjustment shaft, 22-threaded connection hole, 3-adjustment device, 31-arc adjustment plate, 32-arc sliding slot, 33-limited rotation slot, 4-telescopic rod, 41-plug hole, 42-pin, 5-headrest assembly, 51-first headrest, 52-second headrest, 53-headrest adjustment assembly, 531-angle rod, 532-stopper, 533-externally threaded sleeve, 54-arc concave surface, 6-lumbar cushion. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0020] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0021] See also Figure 1 , Figure 2 , Figure 3, an office chair with adjustable headrest and backrest in a specific embodiment of the present invention comprises a seat 1 and a seat back 2, wherein the seat 1 comprises a seat cushion 11 and a support bracket 12, and further comprises an adjustment device 3 arranged and fixed on the seat 1 and movably connected with the seat back 2 for adjusting the angle between the seat back 2 and the seat 1, wherein the adjustment device 3 comprises two sets of arc adjustment plates 31 symmetrically fixed at the edge positions of the seat 1, a fixed adjustment shaft 21 arranged on the seat back 2 and mountable to the adjustment plate, and further comprises a telescopic rod 4 with one end hinged to the support footrest and the other end hinged at the end position below the seat back 2 for limiting the rotation of the seat back 2, and further comprises a headrest assembly 5 arranged on the seat back 2, wherein the headrest assembly 5 comprises a first headrest 51 and a second headrest 52, and further comprises a plurality of headrest adjustment assemblies 53 respectively used for mounting and fixing the first headrest 51 or the second headrest 52 to the seat back 2.

[0022] In this embodiment, the seat cushion 11 is installed on the support bracket 12, and the adjustment device 3 is also fixedly installed on the support bracket 12. The support bracket 12 is slightly wider than the seat back 2, which is equivalent to the width of the seat 1 being slightly wider than the seat back 2. In this way, the seat armrest can be conveniently installed without occupying the space of the seat 1. In this way, the arc-shaped adjustment plate 31 in the adjustment device 3 is installed slightly closer to the center at the edge of the seat 1, and the fixed adjustment shaft 21 is fixedly installed on both sides of the seat back 2. By inserting the fixed adjustment shaft 21 into the limit rotation groove on the arc-shaped adjustment plate 31, the height of the seat back 2 above the seat 1 can be limited. Similarly, the user can lift the seat back 2 to make the fixed adjustment shaft 21 slide out of the limit rotation slot 33 into the arc-shaped sliding slot 32, thereby changing the fixed adjustment shaft 21 to be inserted into a different limit rotation slot 33 on the arc-shaped adjustment plate 31, thereby achieving the function of adjusting the height of the seat back 2.

[0023] As one of the preferred items of this embodiment, considering the rotation requirements of the chair back 2, a telescopic rod 4 is hingedly provided at the lower end position of the chair back 2, and the telescopic rod 4 is set as a sleeve telescopic rod body in the form of a multi-axis sleeve. In this embodiment, the telescopic rod 4 adopts the simplest two-axis sleeve telescopic rod body, that is, the telescopic rod 4 has a total of two sections. In fact, the telescopic rod 4 of the present invention can also adopt an electric telescopic rod or a hydraulic telescopic rod. Considering the volume and cost, the sleeve telescopic rod 4 of the ordinary mechanical structure is obviously more suitable for this device. As for the telescopic rod 4 of this embodiment, a large number of plug holes 41 and a pin 42 that can be inserted into the plug holes 41 on the two rod bodies at the same distance are arranged on the two mutually sleeved rod bodies of the telescopic rod 4. When actually adjusting the angular position of the chair back 2, it is necessary to remove the pin 42 first. When rotating the chair back 2, the two ends of the telescopic rod 4 are respectively hinged to the support bracket 12 of the seat 1 and the lower end surface of the chair back 2, so the length of the telescopic rod 4 will change adaptively with the rotation of the chair back 2. The hinge structure between the telescopic rod 4 and the chair back 2 and the hinge structure between the telescopic rod 4 and the supporting bracket 12 can both adopt hinge devices commonly available on the market.

[0024] As the second preferred option of the present embodiment, the headrest assembly 5 in the present embodiment is different from the traditional headrest, wherein the first headrest 51 and the second headrest 52 are both configured as spherical structures, so that the first headrest 51 or the second headrest 52 can have a smaller contact surface when contacting the user's head and neck, thereby preventing the user from sweating and wetting the headrest during long-term use or the user from experiencing an unpleasant feeling of dampness and heat when using it. At the same time, the first headrest 51 and the second headrest 52 are internally provided with spherical keels, and the spherical keels are covered with breathable cushions, which can avoid the user from having a sharp discomfort when using the headrest assembly 5 due to the small contact surface. The most important thing is that the positions of the first headrest 51 and the second headrest 52 on the chair back 2 can be adjusted in the horizontal direction, wherein the structure for adjusting the headrest assembly 5 is called a headrest adjustment assembly 53, and the headrest adjustment assembly 53 includes a folded rod 531 with one end connected and fixed to the first headrest 51 or the second headrest 52 and the other end connected to the side position of the chair back 2, and also includes a stopper 532 provided at the end of the folded rod 531 connected to the chair back 2 and an external threaded sleeve 533 sleeved on the folded rod 531. The folded rod 531 is provided with multiple turnings, the main purpose of which is to enable the end of the folded rod 531 connected to the first headrest 51 or the second headrest 52 to be parallel to the end connected to the chair back 2. Since a threaded connection hole 22 is provided on the chair back 2, and an externally threaded sleeve 533 is provided on the end of the angle rod 531 connected to the chair back 2, and a thread is provided on the surface of the externally threaded sleeve 533, which can be threadedly connected to the threaded connection hole 22, and the externally threaded sleeve 533 is installed on the angle rod 531 and is stopped by the stopper 532 at the end of the angle rod 531 so that it will not fall out. When the externally threaded sleeve 533 is rotated to install it on the chair back 2, the first headrest 51 or the second headrest 52 can be installed on the chair back 2, and the first headrest 51 or the second headrest 52 can be moved in the horizontal direction by rotating the externally threaded sleeve 533, thereby changing the distance between the first headrest 51 and the second headrest 52, so that users with different neck thicknesses can use the device. The chair back 2 is also provided with an arc-shaped concave surface 54 on which the first headrest 51 and the second headrest 52 can be placed at the same time. The arc-shaped concave surface 54 is mainly used to support the first headrest 51 or the second headrest 52, and prevent the first headrest 51 or the second headrest 52 from sliding on the chair back 2 under the premise that the angle rod 531 itself can rotate more flexibly. A waist cushion 6 is also provided at the connection between the seat 1 and the chair back 2, which can be used to relieve waist fatigue.

[0025] Anything not mentioned above is applicable to the prior art.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An office chair with an adjustable headrest and a backrest, characterized in that: The invention relates to a chair seat (1) and a chair back (2), wherein the chair seat (1) comprises a chair seat cushion (11) and a support bracket (12), and further comprises an adjustment device (3) fixed on the chair seat (1) and movably connected to the chair back (2) for adjusting the angle between the chair back (2) and the chair seat (1), wherein the adjustment device (3) comprises two sets of arc-shaped adjustment plates (31) symmetrically fixed to the edge positions of the chair seat (1), a fixed adjustment shaft (21) arranged on the chair back (2) and installable on the adjustment plate, and further comprises a telescopic rod (4) with one end hinged on the support bracket and the other end hinged on the end position below the chair back (2) for limiting the rotation of the chair back (2), and further comprises a headrest assembly (5) arranged on the chair back (2), wherein the headrest assembly (5) comprises a first headrest (51) and a second headrest (52), and further comprises a plurality of headrest adjustment groups respectively used for installing and fixing the first headrest (51) or the second headrest (52) to the chair back (2). The headrest adjustment assembly (53) comprises a folded rod (531) having one end connected and fixed to the first headrest (51) or the second headrest (52) and the other end connected to the side of the chair back (2), and further comprises a stopper (532) arranged at one end of the folded rod (531) connected to the chair back (2) and an externally threaded sleeve (533) sleeved on the folded rod (531); further comprises threaded connection holes (22) arranged at both sides of the chair back (2) for matching with the externally threaded sleeve (533); the first headrest (51) and the second headrest (52) are both configured as spheres, and an arcuate concave surface (54) is further provided on the chair back (2) for simultaneously placing the first headrest (51) and the second headrest (52); the arcuate adjustment plate (31) is provided with an arcuate sliding slot hole (32) and a plurality of position-limiting rotation slot holes (33) connected to the arcuate sliding slot hole (32).

2. An office chair with adjustable headrest and backrest according to claim 1, characterized in that: The telescopic rod (4) is configured as a sleeve-connected telescopic rod body in a multi-axis sleeve-connected form.

3. An office chair with adjustable headrest and backrest according to claim 2, characterized in that: It also includes a plurality of insertion holes (41) arranged at equal distances on the rod body of the telescopic rod (4), and a plug pin (42) that can be inserted into the insertion hole (41) to limit the length of the telescopic rod (4).

4. The office chair with adjustable headrest and backrest according to claim 2, characterized in that: It also includes a lumbar cushion (6) arranged at the connection between the seat (1) and the backrest (2).

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