CN117158738A - Lifting office chair with adjustable backrest angle - Google Patents

Abstract

The application relates to the technical field of lifting office chairs, in particular to a lifting office chair with an adjustable backrest angle, which comprises a movable base, a supporting mechanism, an adjusting mechanism and a deflection mechanism. According to the application, the first supporting part and the second supporting part in the supporting mechanism are different in size and position, and the corresponding two supporting plates are respectively kept close to the back and the neck of a user through the adjusting mechanism when the user keeps sitting postures, so that the neck and the back of the user can be supported, the phenomenon that the weight of the upper half of the human body is fully accumulated on the cervical vertebra and the vertebra is avoided, the damage to the human body caused by long-time sitting postures is reduced, the adjusting groups in the first supporting part and the second supporting part work respectively, the angle between the corresponding two supporting plates is adjusted, the distance adjusting group adjusts the distance between the first supporting part and the second supporting part through the moving column, namely, the neck and the back of people with different stature are adapted, and the supporting plates are ensured to be close to the neck and the back of the user.

Description

Lifting office chair with adjustable backrest angle

Technical Field

The application relates to the technical field of lifting office chairs, in particular to a lifting office chair with an adjustable backrest angle.

Background

In modern people's life, no matter rest, work or amusement leave the chair, especially to the office group of working that needs to carry out the work with the position of sitting state for a long time, most of its during operation all spent on office chair to office chair's comfort level, function etc. all have to a great extent determined people's work efficiency and the human comfort level of during operation, to current office chair mostly have the lift function, and single lift function is more difficult to satisfy people's user demand, and most of office chairs at present have following problem in the use simultaneously: 1. because of the long-time sitting posture state of the office workers, the back and the neck of the office workers can be better supported and assisted in the long-time sitting posture state, so that the neck and the back of the workers are easy to be ache and the neck and the back are easy to be damaged when the sitting posture is kept for a long time.

2. Because the office chair has wider use population, the heights and the body types of the use population are mostly different, and the back and the neck of the office chair user are difficult to support when being supported.

Disclosure of Invention

Based on this, it is necessary to provide a lifting office chair with an adjustable backrest angle, which aims to solve the problem that the back and the neck of the office chair user are not supported enough and the back and the neck of different people are difficult to support in the prior art.

In one aspect, the present application provides a lift office chair with an adjustable backrest angle, comprising: the seat cushion comprises a movable base, wherein an air rod is arranged on the movable base, a cushion plate is fixedly arranged at the telescopic end of the air rod, an adjusting shaft is arranged on the right side end face of the cushion plate in a rotating mode through two transverse blocks, and a backboard is fixedly sleeved on the adjusting shaft.

The side grooves are formed in the backboard, two side sliding blocks are slidably arranged in the side grooves, and supporting mechanisms are arranged on the two side sliding blocks together.

The movable column is arranged on the side sliding block, a first supporting portion is arranged on the movable column at the lower side, a second supporting portion is arranged on the movable column at the upper side, the first supporting portion is identical to the second supporting portion, and only the sizes of the first supporting portion and the second supporting portion are different.

The right side of the backrest plate is provided with an adjusting mechanism for adjusting the positions of the two movable columns.

The deflection mechanism is arranged on the adjusting shaft and the cushion plate.

The first supporting part comprises a rectangular plate, the lower side the left end face of the movable column is fixedly provided with the rectangular plate, the opposite faces of the rectangular plate and the backboard are hinged through a connecting column to be provided with two support plates which are symmetrical front and back and arc-shaped, the front end face and the rear end face of the rectangular plate are fixedly provided with elastic strips fixedly connected with the corresponding support plates, the two elastic strips enable the two support plates to be close to each other, and the opposite faces of the rectangular plate and the backboard are provided with an adjusting group for adjusting the angles of the two support plates

According to an advantageous embodiment, the adjusting group comprises a fixed plate, two groups of plate groups which are symmetrical around are fixedly arranged on the opposite surfaces of the rectangular plate and the supporting plate, two fixing plates which are symmetrical up and down are arranged in the plate groups, a rotating shaft is arranged between the two fixing plates in a rotating mode, a winding roller is fixedly arranged on the rotating shaft, a connecting rope is wound on the winding roller, the other end of the connecting rope is fixedly connected with the corresponding supporting plate, and a driving group is fixedly arranged on the lower end face of the rectangular plate.

According to an advantageous embodiment, the driving group comprises an L-shaped plate, the lower end face of the rectangular plate is fixedly provided with the L-shaped plate, the upper end face of the vertical part of the L-shaped plate and the rectangular plate is provided with two driving gears which are symmetrical front and back and are meshed with each other through gear shaft rotation, the gear shaft is connected and matched with the corresponding rotating shaft through a transmission belt, and the gear shaft on the front side is connected with an external motor.

According to an advantageous embodiment, adjustment mechanism includes the slider groove, the slider groove of symmetry around two is seted up to the opposite sides of back board and backup pad, sliding in the slider groove is provided with electronic slider one, fixed being provided with the curb plate on the electronic slider one, the joint rotation is provided with the center pin between two curb plates, the center pin is connected with outside motor two, fixed cover is equipped with the regulating strip on the center pin, the bar groove has all been seted up at the both ends portion of the preceding terminal surface of regulating strip, the standing groove has been seted up to the terminal surface that the movable column is located the back board right side, be provided with the slip post jointly between the front and back both ends face of standing groove inner wall, and the slip post slides in the standing groove that corresponds, be provided with the distance adjustment group between two sideslips, be provided with the fixed group jointly between slip post and the movable column that corresponds.

According to an advantageous embodiment, the distance adjusting group comprises a rotating shaft, the rotating shaft is rotatably arranged on the backboard, the rotating shaft is connected with an external motor, a rotating gear is fixedly sleeved on the rotating shaft, two block moving grooves which are distributed front and back are formed in the right side end face of the backboard, rack plates which are meshed with the rotating gear are slidably arranged in the block moving grooves through moving blocks, and the two rack plates are fixedly connected with corresponding side sliding blocks through connecting blocks respectively.

According to an advantageous embodiment, the fixed group comprises a sliding groove, the rear end face of the inner wall of the placing groove is provided with the sliding groove, the corresponding sliding column slides in the sliding groove along the axial direction of the moving column, the circumferential surface of the moving column is provided with a containing groove communicated with the placing groove, the part of the sliding column located outside the containing groove is subjected to thread treatment, and the sliding column is provided with a fixed ring through thread fit.

According to an advantageous embodiment, the deflection mechanism includes horizontal to the board, both ends face all is provided with horizontal to the board through square fixed, horizontal to the right side end of board is the arcwall face, arc wall has been seted up to the arcwall face of board, be provided with through the arc strip rotation in the arc wall and rotate the plectane, the circular slot has all been seted up to the opposite face of two rotation plectanes, circular terminal surface rotation of circular slot inner wall is provided with the rotation button with regulating axle fixed connection, limit groove has been seted up to the circumference face of rotation button, be provided with the arc through electric slider two slip in the limit groove, a plurality of circumference evenly distributed's draw-in grooves have all been seted up to the opposite face of two rotation plectanes, the extrados of arc is fixed to be provided with a plurality of circumference evenly distributed and with the fixture block of corresponding position mutually supporting, all be provided with range adjustment group on two horizontal to the board.

According to an advantageous embodiment, the range adjustment group includes the circular arc groove, be described with the range adjustment group of front side, the front side the circular arc groove has been seted up to the rear end face of board to violently, and the axis in circular arc groove and the axis collineation of turning the plectane, the circular arc inslot wall has been seted up three from preceding to afterwards and for circumference evenly distributed's circular slot, the intercommunication groove with three circular slot and circular arc groove intercommunication has been seted up to the preceding terminal surface of board to violently, the fixed mounting panel that is provided with of circumference face of turning the plectane, movable mounting has the control post on the mounting panel, the control post is spacing with the circular slot mutually supporting, the fixed cover in mid portion of control post is equipped with the installation plectane, the fixed spring that is provided with jointly between installation plectane and the mounting panel, the preceding terminal surface of control post is provided with the holding down plate through the connecting rod is fixed.

In summary, the present application includes at least one of the following beneficial effects: 1. according to the application, the first supporting part and the second supporting part in the supporting mechanism are different in size and position, and the two corresponding supporting plates are respectively kept close to the back and the neck of the user through the adjusting mechanism when the user keeps sitting postures, so that the neck and the back of the user can be supported, the situation that the weight of the upper half of the human body is fully accumulated on the cervical vertebra and the vertebra is avoided, the damage to the human body caused by long-time sitting postures is reduced, and meanwhile, the comfort of the user in office is improved.

2. According to the application, the first supporting part and the second supporting part respectively work, so that the angle between the corresponding two supporting plates is adjusted, and meanwhile, the distance between the first supporting part and the second supporting part can be adjusted by moving the column through the set distance adjusting group, namely, the device is suitable for the neck and the back of people with different stature and body shapes, and the corresponding supporting plates are ensured to be tightly attached to the neck and the back of a user.

3. The fixing group arranged in the application works, the position of the sliding column in the sliding groove is adjusted, and the sliding column is limited through the fixing circular ring, so that the distance between the moving column and the adjusting bar is controlled, namely, the distance between the first supporting part and the second supporting part is adjusted, therefore, when the back of a user is supported, the corresponding supporting plate is attached to and supports the back of the user, and after the adjusting bar rotates, the supporting plate for supporting the neck can be attached to the neck of the user, the problem that the neck and the back of the user cannot be supported is avoided, and the use requirement of the user is met.

4. According to the application, the clamping blocks are matched with the clamping grooves at different positions to finish adjustment of the backboard at different degrees, the control column is moved into different circular grooves, and then when the angle of the backboard is adjusted, the angle range of the backboard can be changed, namely, the control column is matched with the circular grooves at different positions to facilitate larger-range angle adjustment of the backboard, so that the use requirement is met.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic perspective view of a structure provided according to an embodiment of the present application.

Fig. 2 is a schematic perspective view showing a structure among a cushion plate, an adjusting shaft, a first supporting portion and a second supporting plate according to an embodiment of the present application.

Fig. 3 shows an enlarged view at a in fig. 2 provided in accordance with an embodiment of the present application.

Fig. 4 shows an enlarged view at B in fig. 3 provided in accordance with an embodiment of the present application.

Fig. 5 is a schematic perspective view of a first support part according to an embodiment of the present application.

Fig. 6 shows a partially cut-away perspective view of a transverse-to-plate and rotating circular plate provided in accordance with an embodiment of the present application.

Wherein the above figures include the following reference numerals: 1. a movable base; 10. a cushion plate; 11. an adjusting shaft; 12. a backboard; 13. a side groove; 14. a side slider; 2. a support mechanism; 20. a moving column; 21. a first supporting part; 210. a rectangular plate; 211. a support plate; 212. an elastic strip; 213. an adjustment group; 2130. a fixing plate; 2131. a rotating shaft; 2132. a connecting rope; 214. a drive group; 2140. an L-shaped plate; 2141. a drive gear; 22. a second supporting part; 3. an adjusting mechanism; 30. a slider groove; 31. a side plate; 32. a central shaft; 33. an adjustment bar; 34. a bar-shaped groove; 35. a placement groove; 36. a sliding column; 37. a distance adjusting group; 370. a rotation shaft; 371. a rotary gear; 372. rack plate; 38. a fixed group; 380. a sliding groove; 381. a receiving groove; 382. fixing the circular ring; 4. a deflection mechanism; 40. transverse to the plate; 41. an arc-shaped groove; 42. rotating the circular plate; 43. a circular groove; 44. rotating the round block; 45. a limit groove; 46. an arc-shaped plate; 47. a clamping groove; 48. a clamping block; 490. an arc groove; 491. a circular groove; 492. a communication groove; 493. a mounting plate; 494. a control column; 495. a spring; 496. pressing the plate.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

As shown in fig. 1 and 2, a lift office chair with an adjustable backrest angle, comprising: the movable base 1, be provided with the gas pole on the movable base 1, the flexible end of gas pole is fixed to be provided with cushion board 10, and cushion board 10 right side terminal surface is provided with regulating spindle 11 through two violently to the piece rotation, and fixed cover is equipped with back board 12 on the regulating spindle 11.

The side groove 13 is formed in the backboard 12, the side groove 13 is provided with two side sliding blocks 14 in a sliding manner, and the two side sliding blocks 14 are provided with the supporting mechanism 2.

The moving column 20, the supporting mechanism 2 includes a moving column 20, the moving column 20 is movably mounted on the side slider 14, a first supporting portion 21 is disposed on the moving column 20 on the lower side, a second supporting portion 22 is disposed on the moving column 20 on the upper side, and the first supporting portion 21 is the same as the second supporting portion 22, and only the sizes are different.

The right side of the backrest plate 12 is provided with an adjusting mechanism 3 for adjusting the positions of the two moving posts 20.

The deflector 4 is provided to the adjustment shaft 11 and the cushion plate 10.

After the user sits on the cushion plate 10, the telescopic end of the cushion plate 10 is driven to lift by controlling the operation of the air rod, so that the cushion plate 10 is adjusted to a required height, the back plate 12 is deflected and adjusted to a specified angle by the deflection mechanism 4, and then the positions of the first support part 21 and the second support part 22 are adjusted by the adjustment mechanism 3, so that when a human body lies down on the back plate 12, the first support part 21 in the support mechanism 2 supports the back of the human body, the second support part 22 supports the neck of the human body, and the comfort level when the office chair is used is improved.

As shown in fig. 5, the first supporting portion 21 includes a rectangular plate 210, the lower side is fixedly provided with the rectangular plate 210 on the left side end surface of the moving column 20, two support plates 211 which are symmetrical and arc-shaped are hinged on the opposite surfaces of the rectangular plate 210 and the backboard 12 through a connecting column, elastic strips 212 fixedly connected with the corresponding support plates 211 are fixedly provided on the front end surface and the rear end surface of the rectangular plate 210, the two support plates are mutually close by the two elastic strips 212, and an adjusting group 213 for adjusting the angle of the two support plates 211 is provided on the opposite surfaces of the rectangular plate 210 and the backboard 12.

As shown in fig. 5, the adjusting set 213 includes a fixing plate 2130, two sets of front-back symmetrical plate sets are fixedly disposed on opposite sides of the rectangular plate 210 and the supporting plate 211, two fixing plates 2130 that are vertically symmetrical are included in the plate sets, a rotation shaft 2131 is rotatably disposed between the two fixing plates 2130, a winding roller is fixedly disposed on the rotation shaft 2131, a connecting rope 2132 is wound on the winding roller, the other end of the connecting rope 2132 is fixedly connected with the corresponding supporting plate 211, and a driving set 214 is fixedly disposed on the lower end surface of the rectangular plate 210.

As shown in fig. 5, the driving set 214 includes an L-shaped plate 2140, the lower end surface of the rectangular plate 210 is fixedly provided with the L-shaped plate 2140, two driving gears 2141 which are symmetrical and meshed with each other in front-back direction are rotatably provided on the upper end surface of the vertical portion of the L-shaped plate 2140 and the rectangular plate 210 through gear shafts, the gear shafts are connected and matched with the corresponding rotating shafts 2131 through transmission belts, and the gear shafts on the front side are connected with an external motor.

As shown in fig. 1 and 2, the adjusting mechanism 3 includes a sliding block groove 30, two sliding block grooves 30 that are symmetrical in front and back are provided on opposite sides of the back plate 12 and the supporting plate 211, an electric sliding block one is provided in the sliding block groove 30, a side plate 31 is fixedly provided on the electric sliding block one, a central shaft 32 is provided between the two side plates 31 in a rotating manner, the central shaft 32 is connected with an external motor two, an adjusting bar 33 is fixedly sleeved on the central shaft 32, two end portions of a front end surface of the adjusting bar 33 are provided with bar grooves 34, a placing groove 35 is provided on an end surface of the moving column 20 on the right side of the back plate 12, sliding columns 36 are jointly provided between front and rear end surfaces of an inner wall of the placing groove 35, the sliding columns 36 slide in the corresponding placing groove 35, a distance adjusting group 37 is provided between the two sliding blocks 14, and a fixing group 38 is jointly provided between the sliding columns 36 and the corresponding moving columns 20.

As shown in fig. 1, 2 and 3, the distance adjusting set 37 includes a rotation shaft 370, the back board 12 is rotatably provided with the rotation shaft 370, the rotation shaft 370 is connected with an external motor three, a rotation gear 371 is fixedly sleeved on the rotation shaft 370, two front-back distributed block moving grooves are formed in the right side end surface of the back board 12, rack plates 372 meshed with the rotation gear 371 are slidably arranged in the block moving grooves through moving blocks, and the two rack plates 372 are fixedly connected with corresponding side sliding blocks 14 through connecting blocks respectively.

As shown in fig. 3 and 4, the fixed set 38 includes a sliding groove 380, a sliding groove 380 is formed in a rear end surface of an inner wall of the placement groove 35, a corresponding sliding column 36 slides in the sliding groove 380 along an axial direction of the moving column 20, a receiving groove 381 communicated with the placement groove 35 is formed in a circumferential surface of the moving column 20, a portion of the sliding column 36 located outside the receiving groove 381 is threaded, and a fixed ring 382 is disposed on the sliding column 36 through threaded fit.

When the device works, firstly, the external motor works three times to drive the rotary gear 371 to rotate positively through the rotary shaft 370, and the two rack plates 372 drive the corresponding side sliding blocks 14 to move in the side grooves 13 through the engagement between the rotary gear 371 and the two rack plates 372, so that the corresponding moving column 20 is driven to move through the side sliding blocks 14, the distance between the first supporting part 21 and the second supporting part 22 is adjusted, adult crowds with different heights are convenient to adapt, the back and neck of a human body are guaranteed to be supported, and the universality of the device is improved.

Meanwhile, the external motor works to drive the front driving gear 2141 to rotate positively through the front driving gear 2141, so that the rear gear shaft rotates and the rotation direction is opposite to the gear shaft rotation direction through the engagement between the two driving gears 2141, then the front rotating shaft 2131 and the rear rotating shaft 2131 drive the corresponding winding rollers to rotate synchronously through the transmission of the transmission belt, so that the two winding rollers wind the corresponding connecting ropes 2132 on the corresponding winding rollers simultaneously, so that the corresponding two elastic strips 212 continue to open, the angle between the two supporting plates 211 is increased, the two supporting plates 211 can adapt to people with different sizes and support the back and the neck of the people more in a fitting way, and meanwhile, when the size of a user is smaller, the angle between the two supporting plates 211 is reduced through the elastic force generated by the deformation of the elastic strips 212, namely the two supporting plates are mutually close to each other, so that the supporting effect of the supporting plates 211 on the back of a human body is guaranteed, and as the second supporting part 22 and the first supporting part 21 have the same structure, the adjusting operation with the corresponding two supporting plates 21 is carried out, so that the angle between the two supporting plates in the second supporting part 22 is adjusted to the designated angle, and the two supporting plates 211 can support the neck of the user conveniently.

In the initial state, the fixed circular ring 382 fixes the position of the sliding column 36 through the threaded fit between the sliding column 36 corresponding to the fixed circular ring, when the office chair user leans against the backboard 12, the back of the user is in close contact with the two supporting plates 211 in the first supporting part 21, at this time, the corresponding two supporting plates 211 support the back of the user, and as the user adjusts the sitting posture, the back of the user pushes the lower moving column 20 and makes the moving column 20 move in the direction that the right part is far away from the side sliding block 14, so the moving column 20 drives the sliding column 36 in the placing groove 35 to move synchronously, the adjusting bar 33 rotates anticlockwise through the fit between the sliding column 36 and the strip groove 34 above the adjusting bar 33, and meanwhile, the upper moving column 20 moves in the direction that the right part is close to the side sliding block 14, so that the two supporting plates 211 in the second supporting part 22 move synchronously and make close to the neck of the user to support, after the user sits well, the neck of the user is prevented from being damaged by the neck of the user, the user can avoid bad neck injury caused by the poor sitting posture and the user,

when the user needs to adjust to a half lying posture, the neck of the user leans right and is mutually clung to the two support plates 211 in the second support part 22, and the upper moving column 20 moves away from the backrest plate 12 with the right end in the process of leaning the neck of the user, so the lower moving column 20 drives the first support part 21 to be close to the back of the human body and supports the back of the human body through the cooperation between the sliding column 36 and the adjusting bar 33, and meanwhile, the external motor works to drive the central shaft 32 to rotate by a designated angle, so the central shaft 32 adjusts the moving column 20 and the corresponding support plate 211 on the first support part through the cooperation between the upper bar-shaped groove 34 and the corresponding sliding column 36, namely adjusts the distance between the first support part 21 and the second support part 22, namely, the corresponding support plate 211 moves to the back and the neck of the user, so that the user can adapt to different support requirements of the back and the neck of the user.

And the corresponding sliding column 36 slides in the sliding groove 380 by manually rotating the fixed ring 382, the position of the sliding column 36 in the sliding groove 380 is adjusted, and the sliding column 36 is limited again by the fixed ring 382, so that the distance between the moving column 20 and the adjusting bar 33 is controlled, namely, the distance between the first supporting part 21 and the second supporting part 22 is adjusted, and therefore, when the back of a user is supported, the corresponding supporting plate 211 is attached to and supported by the back of the user, and after the adjusting bar 33 is rotated, the supporting plate 211 for supporting the neck can be attached to the neck of the user, and the problem that the neck and the back of the user cannot be supported is avoided.

As shown in fig. 2 and 6, the deflection mechanism 4 includes a transverse plate 40, the front and rear end surfaces of the cushion plate 10 are fixedly provided with the transverse plate 40 through square blocks, the right side end of the transverse plate 40 is an arc surface, the arc surface of the transverse plate 40 is provided with an arc groove 41, a rotating circular plate 42 is rotatably provided in the arc groove 41 through an arc strip, opposite surfaces of the two rotating circular plates 42 are provided with circular grooves 43, the circular end surface of the inner wall of the circular groove 43 is rotatably provided with a rotating circular block 44 fixedly connected with the adjusting shaft 11, the circumferential surface of the rotating circular block 44 is provided with a limit groove 45, the opposite surfaces of the two rotating circular plates 42 are provided with a plurality of clamping grooves 47 which are uniformly distributed in the circumferential direction, the outer arc surface of the arc plate 46 is fixedly provided with a plurality of clamping blocks 48 which are uniformly distributed in the circumferential direction and are mutually matched with the corresponding positions, and the two transverse plates 40 are provided with a range adjusting group.

As shown in fig. 2 and 6, the range adjustment group includes an arc groove 490, the front side is illustrated by the front side range adjustment group 213, the rear end face of the transverse plate 40 is provided with the arc groove 490, the axis of the arc groove 490 is collinear with the axis of the rotary circular plate 42, the inner wall of the arc groove 490 is provided with three circular grooves 491 which are uniformly distributed from front to back and circumferentially, the front end face of the transverse plate 40 is provided with a communication groove 492 which communicates the three circular grooves 491 with the arc groove 490, the circumferential surface of the rotary circular plate 42 is fixedly provided with a mounting plate 493, the mounting plate 493 is movably provided with a control column 494, the control column 494 and the circular groove 491 are mutually matched and limited, the middle part of the control column 494 is fixedly sleeved with a mounting circular plate, a spring 495 is fixedly arranged between the mounting circular plate and the mounting plate 493, and the front end face of the control column 494 is fixedly provided with a pressing plate 496 through a connecting rod.

In the process of adjusting the backboard 12, the second electric sliding block works to drive the arc-shaped plate 46 and all clamping blocks 48 on the arc-shaped plate 46 to move out of the corresponding clamping grooves 47, then the angle of the backboard 12 is adjusted, when the backboard 12 moves to a specified angle, the second electric sliding block drives the arc-shaped plate 46 and the corresponding clamping blocks 48 to reset, so that the adjustment of the backboard 12 is completed, and the set clamping blocks 48 are matched with the clamping grooves 47 at different positions to complete the adjustment of the backboard 12 at different degrees, and meanwhile, the stability of the backboard 12 in use is guaranteed by simultaneously matching the clamping blocks 48 with the corresponding clamping grooves 47.

And the pressing plate 496 is manually pressed to enable the pressing plate 496 to drive the control column 494 to withdraw from the round groove 491 through the connecting rod, the spring 495 is compressed, then the rotary circular plate 42 is rotated, the rotary circular plate 42 drives the control column 494 to rotate to the round groove 491 at a corresponding position through the corresponding mounting plate 493, and at the moment, the rotary circular plate 42 drives the backboard 12 to rotate through the adjusting shaft 11, the position of the clamping groove 47 on the rotary circular plate 42 is changed, then the pressing plate 496 is manually stopped, the control column 494 moves into the corresponding round groove 491 under the action of the elastic force generated by the deformation of the spring 495, so that the mounting plate 493 and the rotary circular plate 42 at the moment are limited, and then when the angle of the backboard 12 is adjusted, the angle range of the backboard 12 can be changed, namely the backboard 12 can be conveniently adjusted in a larger range through the matching of the control column 494 with the round groove 491 at different positions, and the requirements of use are met.

When the seat cushion plate 10 is used, a user sits on the seat cushion plate 10, the telescopic end of the seat cushion plate 10 is driven to lift by controlling the air rod to adjust the seat cushion plate 10 to a required height, then the clamping blocks 48 in the deflection mechanism 4 are matched with the clamping grooves 47 at different positions to finish the adjustment of the back plate 12 at different degrees, and the control column 494 is matched with the round grooves 491 at different positions to enable the back plate 12 to perform larger-range angle adjustment, so that the use requirement is met.

Then, the external motor works three times to drive the rotating gear 371 to rotate positively, and the two rack plates 372 drive the corresponding side sliding blocks 14 to move in the side grooves 13, so that the distance between the first supporting part 21 and the second supporting part 22 is adjusted, and the two winding rollers wind the corresponding connecting ropes 2132 on the two winding rollers simultaneously through the two driving gears 2141 and the transmission of the connecting belt by the external motor, namely the corresponding two elastic strips 212 are continuously opened, so that the angle between the two supporting plates 211 is increased, and the two supporting plates 211 can adapt to people with different sizes and support the backs and the necks of the people more in a fitting manner.

And the two movable columns 20 drive the corresponding supporting plates 211 to be respectively and tightly supported with the back and the neck of the user through the matching between the strip-shaped grooves 34 on the adjusting strips 33 and the corresponding sliding columns 36.

In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Furthermore, the terms "first," "second," "first," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "first", "second", "first", "second" may include at least one such feature, either explicitly or implicitly. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

The embodiments of the present application are all preferred embodiments of the present application, and are not limited in scope by the present application, so that all equivalent changes according to the structure, shape and principle of the present application are covered in the scope of the present application.

Claims (8)

1. A lift office chair with an adjustable back angle comprising:

the movable base (1), the movable base (1) is provided with an air rod, the telescopic end of the air rod is fixedly provided with a cushion plate (10), the right end face of the cushion plate (10) is rotatably provided with an adjusting shaft (11) through two transverse blocks, and the adjusting shaft (11) is fixedly sleeved with a backrest plate (12);

the side grooves (13) are formed in the backboard (12), the side grooves (13) are internally provided with two side sliding blocks (14) in a sliding manner, and the two side sliding blocks (14) are jointly provided with the supporting mechanism (2);

the support mechanism (2) comprises a moving column (20), the moving column (20) is movably mounted on the side sliding block (14), a first support part (21) is arranged on the moving column (20) at the lower side, and a second support part (22) is arranged on the moving column (20) at the upper side;

the right side of the backrest plate (12) is provided with an adjusting mechanism (3) for adjusting the positions of the two movable columns (20);

the deflection mechanism (4) is arranged on the adjusting shaft (11) and the cushion plate (10);

the first supporting part (21) comprises a rectangular plate (210), the lower side is fixedly provided with the rectangular plate (210) on the left side end face of the movable column (20), two support plates (211) which are symmetrical front and back and are arc-shaped are hinged to the opposite faces of the rectangular plate (210) and the back plate (12) through connecting columns, elastic strips (212) fixedly connected with the corresponding support plates (211) are fixedly arranged on the front end face and the rear end face of the rectangular plate (210), and an adjusting group (213) used for adjusting the angles of the two support plates (211) is arranged on the opposite faces of the rectangular plate (210) and the back plate (12).

2. The lift office chair with adjustable back angle of claim 1, wherein: the adjusting group (213) comprises fixing plates (2130), two groups of plate groups which are symmetrical around are fixedly arranged on opposite sides of the rectangular plate (210) and the supporting plate (211), two fixing plates (2130) which are symmetrical up and down are arranged in the plate groups in a rotating mode, a rotating shaft (2131) is arranged between the two fixing plates (2130) in a rotating mode, a winding roller is fixedly arranged on the rotating shaft (2131), a connecting rope (2132) is wound on the winding roller, the other end of the connecting rope (2132) is fixedly connected with the corresponding supporting plate (211), and a driving group (214) is fixedly arranged on the lower end face of the rectangular plate (210).

3. The lift office chair with adjustable back angle of claim 1, wherein: the driving group (214) comprises an L-shaped plate (2140), the L-shaped plate (2140) is fixedly arranged on the lower end face of the rectangular plate (210), two driving gears (2141) which are symmetrical front and back and are meshed with each other are rotatably arranged on the upper end face of the vertical portion of the L-shaped plate (2140) and the upper end face of the vertical portion of the rectangular plate (210) through gear shafts, and the gear shafts are connected and matched with corresponding rotating shafts (2131) through transmission belts.

4. The lift office chair with adjustable back angle of claim 1, wherein: the utility model provides an adjusting mechanism (3) including slider groove (30), slider groove (30) of symmetry around having seted up on the opposite sides of back board (12) and backup pad (211), sliding in slider groove (30) is provided with electronic slider one, fixed being provided with curb plate (31) on electronic slider one, it is provided with center pin (32) to rotate jointly between two curb plates (31), fixed cover is equipped with adjustment strip (33) on center pin (32), bar groove (34) have all been seted up at the both ends portion of the preceding terminal surface of adjustment strip (33), standing groove (35) have been seted up to terminal surface that movable column (20) are located back board (12) right side, be provided with sliding column (36) jointly between the front and back both ends face of standing groove (35) inner wall, and sliding column (36) are provided with distance adjustment group (37) in the sliding between two side sliding blocks (14), be provided with fixed group (38) jointly between sliding column (36) and the corresponding movable column (20).

5. The lift office chair with adjustable back angle of claim 4, wherein: the distance adjusting group (37) comprises a rotating shaft (370), the rotating shaft (370) is rotatably arranged on the backboard (12), a rotating gear (371) is fixedly sleeved on the rotating shaft (370), two block moving grooves which are distributed front and back are formed in the right side end face of the backboard (12), rack plates (372) which are meshed with the rotating gear (371) are arranged in the block moving grooves in a sliding mode through moving blocks, and the two rack plates (372) are fixedly connected with corresponding side sliding blocks (14) through connecting blocks respectively.

6. The lift office chair with adjustable back angle of claim 4, wherein: fixed group (38) are including sliding tray (380), sliding tray (380) have been seted up to the rear end face of standing groove (35) inner wall, and corresponding slip post (36) are along the axial slip of moving post (20) in sliding tray (380), and holding tank (381) with standing groove (35) intercommunication have been seted up to the circumference face of moving post (20), and part that sliding post (36) are located holding tank (381) outside is through the screw thread treatment, is provided with fixed ring (382) through screw thread fit on sliding post (36).

7. The lift office chair with adjustable back angle of claim 1, wherein: the deflection mechanism (4) comprises transverse plates (40), transverse plates (40) are fixedly arranged on the front end face and the rear end face of the cushion plate (10) through square blocks, arc-shaped faces are arranged on the right side ends of the transverse plates (40), arc-shaped grooves (41) are formed in the arc-shaped faces of the transverse plates (40), rotating circular plates (42) are rotatably arranged in the arc-shaped grooves (41) through arc bars, circular grooves (43) are formed in opposite faces of the two rotating circular plates (42), rotating circular blocks (44) fixedly connected with an adjusting shaft (11) are rotatably arranged on the circular end faces of the inner walls of the circular grooves (43), limiting grooves (45) are formed in the circumferential faces of the rotating circular blocks (44), arc-shaped plates (46) are slidably arranged in the limiting grooves (45) through electric sliding blocks, a plurality of clamping grooves (47) which are uniformly distributed in the circumferential directions are fixedly arranged on opposite faces of the two rotating circular plates (42), clamping blocks (48) which are mutually matched with corresponding positions are fixedly arranged on the outer cambered surfaces of the arc-shaped plates of the two transverse plates (46), and the two transverse plates (40) are provided with adjusting ranges.

8. The lift office chair with adjustable back angle of claim 7, wherein: the range adjusting group comprises an arc groove (490), the front side the arc groove (490) is formed in the rear end face of the transverse plate (40), the axis of the arc groove (490) is collinear with the axis of the rotary circular plate (42), three circular grooves (491) which are uniformly distributed circumferentially from front to back are formed in the inner wall of the arc groove (490), a communicating groove (492) which communicates the three circular grooves (491) with the arc groove (490) is formed in the front end face of the transverse plate (40), a mounting plate (493) is fixedly arranged on the circumferential surface of the rotary circular plate (42), a control column (494) is movably mounted on the mounting plate (493), the control column (494) is mutually matched and limited with the circular groove (491), a mounting circular plate is fixedly sleeved on the middle portion of the control column (494), a spring (495) is fixedly arranged between the mounting circular plate and the mounting plate (493), and the front end face of the control column (494) is fixedly provided with a pressing plate (496) through a connecting rod.