Height-adjustable backrest chair

Abstract

The utility model relates to the technical field of backrest chairs, in particular to a height-adjustable backrest chair, which comprises a support bar, an adjusting mechanism, a seat support, a backrest and a cushion, the adjusting mechanism comprises an adjusting sleeve, a support leg, a spring groove, a spring, a slider and a fixing bolt, the adjusting sleeve is welded with the support bar, a plurality of fixing jacks are arranged on the adjusting sleeve, and the spring groove is arranged in the spring groove. The supporting legs are slidably connected to the inner circumferential face of the adjusting sleeve, the spring grooves are formed in the supporting legs, baffles are arranged on the inner circumferential faces of the spring grooves, the sliding blocks are slidably connected to the interiors of the spring grooves, one ends of the springs abut against the baffles, the other ends of the springs abut against the sliding blocks, and the faces, away from the springs, of the sliding blocks abut against the inner circumferential faces of the supporting legs. The fixing bolts penetrate through the through holes and the fixing insertion holes to be connected with the sliding blocks, the seat support is fixedly arranged on the supporting legs, and the backrest and the cushion are fixedly arranged on the seat support. The backrest chair is provided with the adjusting mechanism, so that the height of the chair can be adjusted, and the backrest chair is convenient to use.

Description

Technical Field

[0001] This application relates to the technical field of backrest chairs, and particularly to a backrest chair with adjustable height. Background Art

[0002] In people's daily life, backrest chairs are often used because they can support people's backs and are more comfortable to use. They are commonly used in public places, hospitals, restaurants, hotels, companies, families and other places.

[0003] Currently, a Chinese utility model patent application with a publication date of February 17, 2023 and a publication number of CN218484100U provides a backrest chair, which includes a backrest, two armrests, a seat surface, two front support feet and two rear support feet. The rear end of the armrest is connected to the backrest, the front end of each armrest is connected to a front support foot, the bottom end of the backrest is connected to two rear support feet. The front end and the rear end of the seat surface are respectively sleeved on the front support foot and the rear support foot in a vertically movable manner. The seat surface is placed on a bracket, and the front end and the rear end of the bracket are also respectively sleeved on the front support foot and the rear support foot. Each front support foot is provided with a front anti - detachment column passing through the bracket below to support the front end of the bracket, and each rear support foot is provided with a rear anti - detachment column passing through the bracket below to support the rear end of the bracket.

[0004] The height of a backrest chair in the related art is not adjustable. For users of different heights and in different usage scenarios, users often have different height requirements for the backrest chair, which brings inconvenience to the use of the backrest chair. Utility Model Content

[0005] The embodiments of this application provide a backrest chair with adjustable height, which can improve the technical problem that the height of the backrest chair in the related art is not adjustable.

[0006] The embodiments of this application provide a backrest chair with adjustable height, including: a support bar, an adjustment mechanism, a seat bracket, a backrest and a cushion. The adjustment mechanism includes an adjustment sleeve, a leg, a spring groove, a spring, a slider and a fixed pin. One end of the adjustment sleeve is welded to the support bar. A plurality of fixed insertion holes are provided on the adjustment sleeve. The leg is slidably connected to the inner peripheral surface of the adjustment sleeve. The spring groove is provided on the inner peripheral surface of the leg and is integrally formed with the leg. A baffle is fixedly provided on the inner peripheral surface of the spring groove. The slider is slidably connected inside the spring groove. One end of the spring abuts against the baffle, and the other end of the spring abuts against one surface of the slider. The surface of the slider away from the spring abuts against the inner peripheral surface of the leg. A through - hole is provided on the leg. The fixed pin passes through the through - hole and the fixed insertion hole to be connected to the slider. The seat bracket is fixedly provided on the leg. The backrest and the cushion are fixedly provided on the seat bracket.

[0007] In the technical solution of the embodiment of the present application, at least the following technical effects are achieved: When the user needs to adjust the height of the backrest chair, the fixing pin can be pressed to make the slider slide inside the spring groove, and the spring is compressed by the slider and the baffle. The head of the fixing pin enters the inside of the adjusting sleeve so that the leg can slide inside the spring sleeve. After adjusting the backrest chair to the appropriate height, the fixing pin is released, and the slider slides inside the spring groove under the thrust of the spring and makes the fixing pin pass through the fixing hole to fix the leg.

[0008] The adjustable-height backrest chair provided by the embodiment of the present application is provided with an adjusting mechanism, which can adjust the height of the seat and facilitates the use of the backrest chair.

[0009] In some embodiments, a sealing ring is sleeved at one end of the adjusting sleeve away from the support bar, and the leg passes through the sealing ring and is slidably connected to the sealing ring.

[0010] In some embodiments, the backrest includes a backrest frame and a backrest net. A plurality of ventilation holes are provided on the backrest net. The edge of the backrest net is fixedly connected to the backrest frame. A limiting strip is provided on the backrest frame. The limiting strip is integrally formed with the backrest frame. A sliding groove is provided on the seat bracket. The limiting strip is located inside the sliding groove and is slidably connected to the seat bracket.

[0011] In some embodiments, threaded holes are provided on both the seat bracket and the limiting strip, and fixing bolts are threadedly connected inside the threaded holes. The seat bracket and the limiting strip are fixedly connected by the fixing bolts.

[0012] In some embodiments, anti-slip pads are sleeved at both ends of the support bar.

[0013] In some embodiments, a fixing column is provided between the adjusting sleeves, and both ends of the fixing column are welded to the adjusting sleeves.

[0014] In some embodiments, an armrest is provided on the seat bracket, and the armrest is welded to the seat bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic diagram of the overall structure of an adjustable-height backrest chair provided by an embodiment of the present application;

[0017] Figure 2 It is a cross-sectional view of the adjusting mechanism;

[0018] Figure 3 is the enlarged view of part A of Figure 2 ;

[0019] Figure 4 is the enlarged view of part B of Figure 2 ;

[0020] Figure 5 is the exploded structural schematic diagram of the backrest and the seat bracket;

[0021] Figure 6 is the enlarged schematic view of part A of Figure 5 ;

[0022] Figure 7 is the enlarged schematic view of part B of Figure 5 .

[0023] Among them, each reference numeral in the figure:

[0024] 1, support bar; 11, anti-slip pad; 21, adjusting sleeve; 212, sealing ring; 211, fixing jack; 22, leg; 221, through hole; 23, spring groove; 231, baffle; 24, spring; 25, slider; 26, fixing pin; 3, seat bracket; 31, chute; 32, threaded hole; 321, fixing bolt; 33, armrest; 4, backrest; 41, backrest frame; 411, limiting strip; 42, backrest net; 421, ventilation hole; 5, seat cushion; 6, fixing column. Detailed implementation manners

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0030] In the present application, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0031] It should be noted that in the present application, words such as "in some embodiments", "exemplarily", "for example", etc. are used to give examples, illustrations or explanations. Any embodiment or design solution described as "in some embodiments", "exemplarily", "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "in some embodiments", "exemplarily", "for example" is intended to present relevant concepts in a specific manner, meaning that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the above words at various positions in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0032] In people's daily lives, backrest chairs are often used because they can support people's backs and are relatively comfortable to use. They are commonly used in public places, hospitals, restaurants, hotels, companies, families and other places.

[0033] A backrest chair in the related art, with a publication number of CN218484100U, includes a backrest, two armrests, a seat surface, two front support feet and two rear support feet. The rear end of the armrest is connected to the backrest, the front end of each armrest is connected to a front support foot, the bottom end of the backrest is connected to the two rear support feet. The front end and the rear end of the seat surface are respectively sleeved on the front support feet and the rear support feet in a vertically movable manner. The seat surface is placed on a bracket, and the front end and the rear end of the bracket are also respectively sleeved on the front support feet and the rear support feet. Each front support foot is provided with a front anti-disengagement column that passes through below the bracket to support and block the front end of the bracket, and each rear support foot is provided with a rear anti-disengagement column that passes through below the bracket to support and block the rear end of the bracket.

[0034] However, the height of a backrest chair in the related art is not adjustable. For users of different heights and in different usage scenarios, users often have different requirements for the height of the backrest chair. Therefore, it brings inconvenience to the use of the backrest chair.

[0035] Based on this, to improve the problems in the related art, the embodiments of the present application provide the following solutions.

[0036] Please refer to Figures 1 to 5 together. The embodiments of the present application provide an adjustable-height backrest chair, including a support bar 1, an adjustment mechanism, a seat bracket 3, a backrest 4 and a seat cushion 5. The adjustment structure is used to adjust the height of the backrest chair.

[0037] Please refer to Figures 1 to 7, the adjusting mechanism includes an adjusting sleeve 21, a leg 22, a spring groove 23, a spring 24, a slider 25 and a fixing pin 26. One end of the adjusting sleeve 21 is welded to the support bar 1. A plurality of fixing holes 211 are formed in the adjusting sleeve 21. The leg 22 is slidably connected to the inner peripheral surface of the adjusting sleeve 21. A sealing ring 212 is sleeved on the end of the adjusting sleeve 21 away from the support bar 1. The leg 22 passes through the sealing ring 212 and is slidably connected to the sealing ring 212. The spring groove 23 is arranged on the inner peripheral surface of the leg 22 and is integrally formed with the leg 22. A baffle 231 is fixedly arranged on the inner peripheral surface of the spring groove 23. The slider 25 is slidably connected inside the spring groove 23. One end of the spring 24 abuts against the baffle 231, and the other end of the spring 24 abuts against one surface of the slider 25. The surface of the slider 25 away from the spring 24 abuts against the inner peripheral surface of the leg 22. A through hole 221 is formed in the leg 22. The fixing pin 26 passes through the through hole 221 and the fixing hole 211 to be connected to the slider 25. The seat bracket 3 is fixedly arranged on the leg 22. The backrest 4 includes a backrest frame 41 and a backrest net 42. A plurality of ventilation holes 421 are formed in the backrest net 42. The edge of the backrest net 42 is fixedly connected to the backrest frame 41. A limiting strip 411 is arranged on the backrest frame 41 and is integrally formed with the backrest frame 41. A sliding groove 31 is formed in the seat bracket 3. The limiting strip 411 is located inside the sliding groove 31. Threaded holes 32 are formed in both the seat bracket 3 and the limiting strip 411. A fixing bolt 321 is threadedly connected inside the threaded hole 32. The seat bracket 3 and the limiting strip 411 are fixedly connected by the fixing bolt 321.

[0038] As can be seen from the above, for the adjustable-height backrest chair provided by the embodiment of the present application, when the user needs to adjust the height of the backrest chair, the fixing pin 26 can be pressed to make the slider 25 slide inside the spring groove 23, and the spring 24 is compressed by the slider 25 and the baffle 231 accordingly. The head of the fixing pin 26 enters the inside of the adjusting sleeve 21 so that the leg 22 can slide inside the spring 24 sleeve. After the backrest chair is adjusted to a suitable height, the fixing pin 26 is released, and the slider 25 slides inside the spring groove 23 under the thrust of the spring 24 and makes the fixing pin 26 pass through the fixing hole 211 to fix the leg 22; the sealing ring 212 can abut against the outer peripheral surface of the leg 22 to form a seal to prevent foreign matters such as external dust and liquid from entering the inside of the adjusting sleeve 21 and interfering with the normal operation of the adjusting mechanism; the ventilation holes 421 can keep the back of the user cool when using the backrest chair for a long time; after the backrest chair is used for a long time, there will be more stains on the backrest net 42, which will affect the use experience of the backrest chair. At this time, the user can screw out the fixing bolt 321 from the threaded hole 32, remove the backrest 4 from the seat bracket 3 to clean the backrest net 42, and then insert the limiting strip 411 into the sliding groove 31 and screw the fixing bolt 321 into the threaded hole 32 to fix the backrest 4, which facilitates the use of the backrest chair.

[0039] In some embodiments, please refer to Figure 1 , anti-slip pads 11 are sleeved at both ends of the support bar 1.

[0040] With such a setting, the anti-slip pads 11 can increase the friction between the bottom of the backrest chair and the ground, and prevent the user from being accidentally injured when the backrest chair slides during the use of the backrest chair.

[0041] Optionally, in some embodiments, please refer to Figure 1 , a fixing column 6 is arranged between the adjusting sleeves 21, and both ends of the fixing column 6 are welded to the adjusting sleeves 21.

[0042] With such a setting, the fixing column 6 can enhance the overall stability of the backrest chair and increase the service life of the backrest chair.

[0043] Optionally, please refer to Figure 1 , an armrest 33 is arranged on the seat bracket 3, and the armrest 33 is welded to the seat bracket 3.

[0044] With such a setting, when the user uses the backrest chair, the armrest 33 can block the user's body to prevent it from falling and getting injured from the backrest chair, and can also allow the user to place the arm on the armrest 33 to rest, increasing the comfort when using the backrest chair.

[0045] The above are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A height-adjustable backrest chair, characterized in that: The invention comprises a support bar (1), an adjustment mechanism, a seat bracket (3), a backrest (4) and a seat cushion (5); the adjustment mechanism comprises an adjustment sleeve (21), a leg (22), a spring slot (23), a spring (24), a slider (25) and a fixing pin (26); one end of the adjustment sleeve (21) is welded to the support bar (1); a plurality of fixing sockets (211) are provided on the adjustment sleeve (21); the leg (22) is slidably connected to the inner circumference of the adjustment sleeve (21); the spring slot (23) is arranged on the inner circumference of the leg (22); the spring slot (23) and the leg (22) are integrally formed; and a fixing pin (26) is fixed on the inner circumference of the spring slot (23). A baffle (231) is provided, the slider (25) is slidably connected inside the spring groove (23), one end of the spring (24) abuts against the baffle (231), the other end of the spring (24) abuts against one side of the slider (25), the side of the slider (25) away from the spring (24) abuts against the inner peripheral surface of the leg (22), a through hole (221) is provided on the leg (22), the fixing pin (26) passes through the through hole (221) and the fixing plug hole (211) and is connected to the slider (25), the seat bracket (3) is fixedly arranged on the leg (22), and the backrest (4) and the seat cushion (5) are fixedly arranged on the seat bracket (3).

2. The height-adjustable backrest chair according to claim 1, characterized in that: A sealing ring (212) is sleeved on one end of the adjustment sleeve (21) away from the support bar (1), and the support leg (22) passes through the sealing ring (212) and is slidably connected to the sealing ring (212).

3. A height-adjustable backrest chair according to any one of claims 1-2, characterized in that: The backrest (4) comprises a backrest frame (41) and a backrest net (42); the backrest net (42) is provided with a plurality of ventilation holes (421); the edge of the backrest net (42) is fixedly connected to the backrest frame (41); a limit strip (411) is provided on the backrest frame (41); the limit strip (411) and the backrest frame (41) are integrally formed; a slide groove (31) is provided on the seat support (3); the limit strip (411) is located inside the slide groove (31) and is slidably connected to the seat support (3).

4. A height-adjustable backrest chair according to claim 3, characterized in that: The seat bracket (3) and the limiting strip (411) are both provided with threaded holes (32), the threaded holes (32) are internally threadedly connected with fixing bolts (321), and the seat bracket (3) and the limiting strip (411) are fixedly connected via the fixing bolts (321).

5. The height-adjustable backrest chair according to claim 4, characterized in that: Anti-slip pads (11) are provided at both ends of the support bar (1).

6. A height-adjustable backrest chair according to claim 5, characterized in that: A fixing column (6) is arranged between the adjusting sleeves (21), and both ends of the fixing column (6) are welded to the adjusting sleeves (21).

7. A height-adjustable backrest chair according to claim 6, characterized in that: The seat support (3) is provided with an armrest (33), and the armrest (33) is welded to the seat support (3).

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