CN219374195U - Office chair with adjustable backrest - Google Patents

Abstract

The utility model relates to the technical field of office chairs, in particular to an office chair with an adjustable backrest, which comprises an office chair, wherein the office chair is arranged on a base, a plurality of rollers are fixed at the lower end of the base, and the office chair further comprises: the middle part of the cross rod is fixed at the upper end of the power source, the cross rod is driven by the power source to move up and down along the guide groove, vertical connecting rods are fixed at two ends of the cross rod, and armrests are arranged at the upper ends of the connecting rods; the headrest is fixed on an office chair through two fixing strips, and the upper surfaces of the fixing strips are provided with sliding grooves; two fixing strips are fixed at the top end of the backrest, the upper surface of the backrest is connected with a headrest in a sliding way through a matched clamping strip, and the clamping strip moves in the sliding groove to change the angle of the headrest body, so that better comfort level is provided for a user.

Description

Office chair with adjustable backrest

Technical Field

The utility model relates to the technical field of office chairs, in particular to an office chair with an adjustable backrest.

Background

The office chair is narrowly defined to mean a backrest chair for a person sitting on when the person is working on a desk in a sitting posture, and is broadly defined to mean all chairs used in offices, including staff chairs, conference chairs, visitor chairs, training chairs and the like, the armrests of the existing office chairs are mostly fixed and cannot be adjusted according to the desired height of the user, and the existing headrest and backrest are mostly integrated, the angle of the headrest cannot be adjusted during rest, and the comfort is poor. In view of this, we propose an office chair with an adjustable backrest.

Disclosure of Invention

In order to make up for the defects, the utility model provides an office chair with an adjustable backrest.

The technical scheme of the utility model is as follows:

the utility model provides an office chair with adjustable back, includes the office chair, the office chair sets up on the base, the base lower extreme is fixed with a plurality of gyro wheels, still includes:

the middle part of the cross rod is fixed at the upper end of the power source, the cross rod is driven by the power source to move up and down along the guide groove, vertical connecting rods are fixed at the two ends of the cross rod, and armrests are arranged at the upper ends of the connecting rods;

the headrest is fixed on the office chair through two fixed bars, the spout has all been seted up to fixed bar upper surface, two the spout bottom all is fixed with the elastic component, and its inside slip is provided with the headrest body.

Preferably, the office chair comprises a support column, wherein the support column is obliquely arranged on one side of the base, the upper side of the support column is connected with a backrest through a first fixing piece, and the lower side of the support column is connected with a seat through a second fixing piece.

Preferably, the power source is arranged at the bottom of the fixed box, the fixed box is arranged on the upper surface of the base, and the guide grooves are formed in two sides of the fixed box.

Preferably, the fixing strips are symmetrically fixed at the top end of the backrest, two clamping strips are symmetrically fixed at the rear side of the headrest body, the elastic piece is a spring, and the other ends of the springs are connected with the clamping strips.

Preferably, the cross bar extends out of the guide grooves on both sides.

Preferably, the clamping strip is matched with the chute, and the clamping strip is arranged in the chute in a sliding manner.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the air cylinder is arranged below the seat to drive the cross rod to move up and down, the armrests are fixedly arranged at the two ends of the cross rod, and the height of each armrest can be adjusted along with the lifting of the air cylinder; two fixing strips are fixed at the top end of the backrest, the upper surface of the backrest is connected with a headrest in a sliding way through a matched clamping strip, and the clamping strip moves in the sliding groove to change the angle of the headrest body, so that better comfort level is provided for a user.

Drawings

Description of the drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of an office chair according to the present utility model;

FIG. 3 is a schematic view of a portion of an office chair according to the present utility model;

FIG. 4 is a cross-sectional view of the armrest assembly of the present utility model;

FIG. 5 is a schematic view of the structure of a headrest according to the present utility model;

fig. 6 is a schematic structural view of a fixing strip in the present utility model.

In the figure:

1. a roller; 2. a base; 3. office chairs; 4. a handrail assembly; 5. a headrest;

31. a support column; 32. a first fixing member; 33. a second fixing member; 34. a chair; 35. a backrest;

321. a first ring; 322. a first bolt; 323. a V-shaped connector; 324. a connecting column; 331; a second ring; 332. a second bolt; 333. a connecting block; 334. a T-shaped block;

41. an armrest; 42. a connecting rod; 43. a fixed box; 44. a guide groove; 45. a cylinder; 46. a cross bar;

51. a headrest body; 52. clamping strips; 53. a fixing strip; 531. a chute; 532. and (3) a spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1-6, the present utility model is described in detail by the following embodiments:

the utility model provides an office chair with adjustable back, includes office chair 3, and office chair 3 sets up on base 2, and base 2 lower extreme is fixed with a plurality of gyro wheels 1, still includes: the middle part of the cross rod 46 is fixed at the upper end of the power source, the cross rod 46 is driven by the power source to move up and down along the guide grooves 44, the cross rod 46 extends out of the guide grooves 44 at two sides, vertical connecting rods 42 are fixed at two ends of the cross rod 46, and armrests 41 are arranged at the upper ends of the connecting rods 42; the headrest 5, headrest 5 is fixed on office chair 3 through two fixed strips 53, and spout 531 has all been seted up to fixed strip 53 upper surface, and two spout 531 bottoms all are fixed with the elastic component, and its inside slip is provided with headrest body 51.

In this embodiment, the armrest assembly 4 includes an armrest 41, a connecting rod 42, a fixing case 43, a guide groove 44, an air cylinder 45, and a cross bar 46, and the armrest 41 is fixedly connected to the upper end of the connecting rod 42.

The office chair 3 comprises a support column 31, wherein the support column 31 is obliquely arranged on one side of the base 2, the upper side of the support column 31 is connected with a backrest 35 through a first fixing piece 32, and the lower side of the support column 31 is connected with a seat 34 through a second fixing piece 33.

In this embodiment, the bottom end of the support column 31 is fixedly connected to the upper surface of the base 2, the first fixing member 32 includes a first ring 321 and a V-shaped connecting member 323 fixedly connected thereto, the first ring 321 is fixed to the support column 31 by a first bolt 322, two sides of the V-shaped connecting member 323 are fixedly connected with connecting columns 324, and the connecting columns 324 are fixedly connected with the backrest 35; the second fixing member 33 includes a second ring 331 and two connecting blocks 333 fixedly connected thereto, the second ring 331 is fixed on the supporting column 31 by a second bolt 332, T-shaped blocks 334 are fixedly connected to opposite sides of the connecting blocks 333, and one end of each T-shaped block 334 is fixedly connected to the backrest 35.

The power supply sets up in fixed case 43 bottom, and fixed case 43 sets up in base 2 upper surface, and guide slot 44 opens in the both sides of fixed case 43.

In this embodiment, the power source is an air cylinder 45, specifically, the air cylinder 45 is fixedly installed at the bottom of the fixed box 43, and the piston rod of the air cylinder is fixedly connected with the middle part of the cross rod 46, the fixed box 43 is fixedly installed on the base 2, and when the height of the armrest 41 needs to be adjusted, the piston rod of the air cylinder 45 is used for stretching and retracting to drive the cross rod 46 to move up and down along the guide groove 44, so that the armrest 41 moves up and down together with the guide groove, and the height adjustment is realized.

The fixing strip 53 is symmetrically fixed at the top end of the backrest 35, two clamping strips 52 are symmetrically fixed at the rear side of the headrest body 51, the elastic piece is a spring 532, the other ends of the spring 532 are connected with the clamping strips 52, the clamping strips 52 are matched with the sliding grooves 531, and the clamping strips 52 are slidably arranged in the sliding grooves 531.

In this embodiment, the clamping strip 52 and the sliding groove 531 are both arc-shaped and have a T-shaped cross section, a longer part of the T-shaped part is clamped inside the sliding groove 531, so that the clamping strip 52 is prevented from sliding off when moving in the sliding groove 531, the length of the clamping strip 52 is shorter than that of the sliding groove 531, when a user feels tired and needs to rest, the user lies on the backrest 35, the head rest is on the headrest body 51, a pressure is applied to the headrest body 51, the clamping strip 52 can be pushed to slide in the sliding groove 531, so that the angle position of the headrest body 51 can be changed, the user can adjust the angle according to own preference, and when the angle adjustment is excessive or the office chair is not used, the spring 532 connected to the bottom end of the clamping strip 52 can pull the headrest body 51 back to the bottom of the sliding groove 531, and the user always only needs to apply a pressure obliquely upwards to adjust the angle of the headrest body 51.

When the height of the armrest 41 is required to be adjusted in specific use, the piston rod of the air cylinder 45 stretches to drive the cross rod 46 to move up and down along the guide groove 44, so that the armrest 41 moves up and down together with the guide groove, and the height is adjusted; when the user feels tired and needs to rest, the user lies on the backrest 35, the head rest is on the head rest body 51, a pressure is applied to the head rest body 51, the clamping strip 52 can be pushed to slide in the sliding groove 531, so that the angle position of the head rest body 51 can be changed, the user can adjust the angle according to the preference of the user, when the angle is excessively adjusted or the office chair is not used, the spring 532 connected with the bottom end of the clamping strip 52 can pull the head rest body 51 back to the bottom of the sliding groove 531, and the user can adjust the angle of the head rest body 51 all the time only by applying an upward inclined pressure.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides an office chair with adjustable back, includes office chair (3), office chair (3) set up on base (2), base (2) lower extreme is fixed with a plurality of gyro wheels (1), its characterized in that: further comprises:

the middle part of the cross rod (46) is fixed at the upper end of the power source, the cross rod is driven by the power source to move up and down along the guide groove (44), vertical connecting rods (42) are fixed at two ends of the cross rod (46), and armrests (41) are arranged at the upper ends of the connecting rods (42);

headrest (5), headrest (5) are fixed on office chair (3) through two fixed strips (53), spout (531) have all been seted up to fixed strip (53) upper surface, two spout (531) bottom all is fixed with the elastic component, and its inside slip is provided with headrest body (51).

2. The back-rest adjustable office chair of claim 1 wherein: the office chair (3) comprises a supporting column (31), the supporting column (31) is obliquely arranged on one side of the base (2), the upper side of the supporting column (31) is connected with a backrest (35) through a first fixing piece (32), and the lower side of the supporting column (31) is connected with a seat (34) through a second fixing piece (33).

3. The back-rest adjustable office chair of claim 1 wherein: the power source is arranged at the bottom of the fixed box (43), the fixed box (43) is arranged on the upper surface of the base (2), and the guide grooves (44) are formed in two sides of the fixed box (43).

4. The back-rest adjustable office chair of claim 2 wherein: the fixing strips (53) are symmetrically fixed at the top end of the backrest (35), two clamping strips (52) are symmetrically fixed at the rear side of the headrest body (51), the elastic piece is a spring (532), and the other ends of the spring (532) are connected with the clamping strips (52).

5. The back-rest adjustable office chair of claim 1 wherein: the cross bar (46) extends out of the guide grooves (44) on both sides.

6. The back-rest adjustable office chair of claim 4 wherein: the clamping strip (52) is matched with the sliding groove (531), and the clamping strip (52) is arranged in the sliding groove (531) in a sliding mode.