阅读说明：本技术 办公椅 (Office chair ) 是由 李别军 刘云鹏 王南侠 梁海军 于 2021-09-27 设计创作，主要内容包括：本发明提供一种办公椅,椅架、椅座、椅背,椅背上端安装有靠枕,靠枕包括固定块、滑动块、连接板、枕头；固定块包括C形架和固定在C形架上的T形滑块,滑动块上开设有横截面为T形的滑槽,T形滑块面向滑槽的一面开设有圆形凹槽,圆形凹槽滑动设置有阻挡柱,阻挡柱与圆形凹槽之间设置压缩弹簧,滑槽的槽底开设有球形槽,球形槽沿T形滑块滑动方向设置多个,且相邻两个球形槽之间设置过渡槽,T形滑块内嵌入磁铁,且磁铁与阻挡柱磁性相吸,且磁铁与阻挡柱的磁性始终小于压缩弹簧给予阻挡柱向外的弹力,T形滑槽靠近C形架的内壁设置为波浪形壁,滑块与波浪形壁相对的面上设置对应的弹性波浪块,弹性波浪块与波浪形壁间隙设置。(The invention provides an office chair, which comprises a chair frame, a chair seat and a chair back, wherein a back cushion is arranged at the upper end of the chair back and comprises a fixed block, a sliding block, a connecting plate and a pillow; the fixed block includes C shape frame and fixes the T shape slider on C shape frame, set up the spout that the cross section is T shape on the slider, T shape slider has seted up circular recess towards the one side of spout, circular recess slides and is provided with the post that blocks, block and set up compression spring between post and the circular recess, spherical groove has been seted up to the tank bottom of spout, spherical groove sets up a plurality ofly along T shape slider slip direction, and set up the aqueduct between two adjacent spherical grooves, the embedded magnet of T shape slider, and magnet and the post magnetism that blocks attract mutually, and magnet and the magnetism that blocks the post are less than compression spring all the time and give and block the outside elasticity of post, the inner wall that T shape spout is close to C shape frame sets up to wave wall, set up the corresponding elastic wave piece on the face that the slider is relative with wave wall, elastic wave piece and wave wall clearance set up.)

1. The utility model provides an office chair, the chair frame, fix the seat support on the chair frame, fix the back of the chair on the chair frame, the back of the chair upper end is installed back cushion, its characterized in that: the back cushion comprises a fixed block fixed on the chair back, a sliding block in sliding fit with the fixed block, a connecting plate fixedly connected with the sliding block, and a pillow fixed on the connecting plate; the fixed block comprises a C-shaped frame and a T-shaped sliding block fixed on the C-shaped frame, a sliding groove with a T-shaped cross section is formed in the sliding block, the upper end of the sliding groove is communicated with the lower end of the sliding groove and is sealed, a circular groove is formed in one surface, facing the sliding groove, of the T-shaped sliding block, a blocking column is arranged in the circular groove in a sliding mode, a compression spring is arranged between the blocking column and the circular groove, a plurality of spherical grooves are formed in the bottom of the sliding groove, a transition groove is formed between every two adjacent spherical grooves and is communicated with the two adjacent spherical grooves, the depth of the transition groove is smaller than that of the spherical groove, a magnet is embedded into the T-shaped sliding block and is attracted with the blocking column, the magnetism of the magnet and the magnetism of the blocking column are always smaller than that the compression spring gives the outward elasticity to the blocking column, and the inner wall, close to the C-shaped frame, of the T-shaped sliding groove is arranged to be a wave-shaped wall, and the surface of the sliding block opposite to the wavy wall is provided with a corresponding elastic wavy block, and the elastic wavy block and the wavy wall are arranged in a clearance way.

2. An office chair as claimed in claim 1, wherein: the one end that blocks post and spherical groove butt is circular-arc and with the laminating of spherical groove.

3. An office chair as claimed in claim 1, wherein: a connecting block is fixed at the bottom of one side of the sliding block, which is far away from the T-shaped sliding block, a protruding part is formed at one end of the connecting block, which is far away from the sliding block, and a round hole is formed in the connecting block; the connecting plate is in an inverted U shape, two flanges are fixed on the inner side of the connecting plate, a connecting column is fixed between the two flanges, a connecting strip is arranged between the connecting column and the connecting plate, a threaded hole is formed in the bottom of the connecting column, the threaded hole is aligned with the round hole, and a bolt penetrates through the round hole and is connected with the threaded hole of the connecting column; and the connecting strip is provided with a notch corresponding to the protruding part.

4. An office chair as claimed in claim 3, wherein: the connecting plate comprises an inner layer and an outer layer, the flange is fixed on the inner layer, the outer layer is fixed above the inner layer, an opening is formed in the inner layer, and an inserting block inserted into the opening is fixed on the outer layer.

5. An office chair as claimed in claim 4, wherein: two positioning blocks are fixed on the top of the sliding block, the inserting block extends into the space between the two positioning blocks, and the pillow is fixed on the outer layer.

6. An office chair as claimed in claim 1, wherein: the back of the chair includes back of the chair frame and back of the chair cushion, back of the chair frame is fixed with the chair frame, the back of the chair frame both ends of back of the chair cushion one side are fixed with the installation pole, a fixed mounting bracket on the installation pole, be fixed with the massager on the mounting bracket, be fixed with the soft cloth including the massager cladding on the mounting bracket, soft cloth butt back of the chair cushion.

7. An office chair as claimed in claim 6, wherein: the massager comprises an installation shell, a motor fixed in the installation shell, an eccentric wheel fixed on an output shaft of the motor, and a massage plate arranged outside the installation shell and close to soft cloth, wherein a butt block is fixed on the massage plate, the butt block abuts against the eccentric wheel, a guide rod is fixed on the massage plate, the guide rod is inserted into a guide groove of the installation shell, a reset spring is arranged in the guide groove, and two ends of the reset spring are fixed with the installation shell and the guide rod respectively.

Technical Field

The invention relates to office furniture, in particular to an office chair.

Background

The office chair is a necessary tool for brainworkers during working, and is often suffered from cervical spondylosis due to the fact that the cervical vertebra is too tired when the office chair works in a sitting posture for a long time, and the cervical vertebra cannot have a rest all the time in the working process. Sitting workers rest or think backwards on the backrest of the chair, while the backrest of a common chair only enables the back to rest but not the neck.

Therefore, a part of office chairs now are provided with headrests to meet the requirements.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an office chair, which is convenient for adjusting the height of a back cushion and is stable in use.

The technical purpose of the invention is realized by the following technical scheme: the utility model provides an office chair, the chair frame, fix the seat support on the chair frame, fix the back of the chair on the chair frame, the back of the chair upper end is installed back cushion, its characterized in that: the back cushion comprises a fixed block fixed on the chair back, a sliding block in sliding fit with the fixed block, a connecting plate fixedly connected with the sliding block, and a pillow fixed on the connecting plate; the fixed block comprises a C-shaped frame and a T-shaped sliding block fixed on the C-shaped frame, a sliding groove with a T-shaped cross section is formed in the sliding block, the upper end of the sliding groove is communicated with the lower end of the sliding groove and is sealed, a circular groove is formed in one surface, facing the sliding groove, of the T-shaped sliding block, a blocking column is arranged in the circular groove in a sliding mode, a compression spring is arranged between the blocking column and the circular groove, a plurality of spherical grooves are formed in the bottom of the sliding groove, a transition groove is formed between every two adjacent spherical grooves and is communicated with the two adjacent spherical grooves, the depth of the transition groove is smaller than that of the spherical groove, a magnet is embedded into the T-shaped sliding block and is attracted with the blocking column, the magnetism of the magnet and the magnetism of the blocking column are always smaller than that the compression spring gives the outward elasticity to the blocking column, and the inner wall, close to the C-shaped frame, of the T-shaped sliding groove is arranged to be a wave-shaped wall, and the surface of the sliding block opposite to the wavy wall is provided with a corresponding elastic wavy block, and the elastic wavy block and the wavy wall are arranged in a clearance way.

When the user sits down normally, the head exerts a backward force and a downward force on the headrest. Because the backward acting force to the back cushion for the sliding block moves backward, the extrusion of wave wall and elasticity wave piece makes the frictional force of both enough big, and the back cushion also receives decurrent power this moment, but frictional force is greater than this decurrent power, and itself has spherical groove and the cooperation that blocks the post, therefore the back cushion is stable in utilization. When the height needs to be adjusted, the headrest is pushed inwards to enable the elastic wave block and the wave-shaped wall to be arranged in a clearance mode, at the moment, although the compression spring is further compressed, the outward thrust of the blocking column is increased through the compression spring, the inward pulling force of the blocking column is given under the action of the magnet, and therefore the friction force between the blocking column and the spherical groove can hardly change. Wherein the acting force of compression spring to the barrier column is not enough to promote the sliding block translation and change the clearance of elasticity wave piece and wave wall, needs artificial effort. When the height of the headrest is adjusted, the blocking column is compressed into the circular groove and moves into the next spherical groove through the transition groove.

Further setting, the one end that blocks post and spherical groove butt is circular-arc and with the laminating of spherical groove.

The bottom of one side, away from the T-shaped sliding block, of the sliding block is fixedly provided with a connecting block, one end, away from the sliding block, of the connecting block is provided with a protruding part, and a round hole is formed in the connecting block; the connecting plate is in an inverted U shape, two flanges are fixed on the inner side of the connecting plate, a connecting column is fixed between the two flanges, a connecting strip is arranged between the connecting column and the connecting plate, a threaded hole is formed in the bottom of the connecting column, the threaded hole is aligned with the round hole, and a bolt penetrates through the round hole and is connected with the threaded hole of the connecting column; and the connecting strip is provided with a notch corresponding to the protruding part.

The connecting plate further comprises an inner layer and an outer layer, the flange is fixed on the inner layer, the outer layer is fixed above the inner layer, an opening is formed in the inner layer, and an inserting block for inserting the opening is fixed on the outer layer.

And further setting, two positioning blocks are fixed at the top of the sliding block, the inserting block extends into the space between the two positioning blocks, and the pillow is fixed on the outer layer.

Further setting, the back of the chair includes back of the chair frame and back of the chair cushion, back of the chair frame is fixed with the chair frame, the back of the chair frame is fixed with the installation pole to the both ends of back of the chair cushion one side, a fixed mounting bracket on the installation pole, be fixed with the massager on the mounting bracket, be fixed with the soft cloth including the massager cladding on the mounting bracket, soft cloth butt back of the chair cushion.

Further setting, the massager includes the installation shell, fix the motor in the installation shell, fix the eccentric wheel on the motor output shaft, set up the massage board that is close to soft cloth in the installation shell outside, a fixed butt piece on the massage board, butt piece butt eccentric wheel, a fixed guide bar on the massage board, the guide bar inserts the guide way of installation shell, sets up a spring in the guide way, and the spring both ends are fixed with installation shell and guide bar respectively.

In conclusion, the invention has the following beneficial effects: the back massage pillow can massage the back, and the headrest can also adjust the height, so that the back massage pillow is comfortable.

Drawings

FIG. 1 is a schematic structural view of an embodiment;

FIG. 2 is a schematic view of the headrest of FIG. 1;

FIG. 3 is a first schematic structural diagram of a slider;

FIG. 4 is a second schematic structural diagram of a slider;

FIG. 5 is a schematic view of a fixed block;

FIG. 6 is a schematic structural view of the outer layer;

FIG. 7 is a schematic view of the inner side;

FIG. 8 is an enlarged partial view of FIG. 7;

FIG. 9 is a schematic view of a back frame and massager;

FIG. 10 is the view of FIG. 9 with the soft cloth hidden;

FIG. 11 is a cross-sectional view of the massager;

FIG. 12 is a schematic view of the connection of the slider to the fixed block.

Reference numerals: 1. a chair frame; 2. a chair seat; 31. a chair back frame; 32. a chair back cushion; 33. mounting a rod; 34. a mounting frame; 35. soft cloth; 4. a massager; 41. mounting a shell; 42. an eccentric wheel; 43. a massage plate; 44. a butting block; 45. a guide bar; 46. a return spring; 5. a back cushion; 51. a fixed block; 52. a slider; 53. a connecting plate; 531. an inner layer; 532. an outer layer; 54. a pillow; 61. a C-shaped frame; 62. a T-shaped slider; 63. a circular groove; 64. a blocking post; 65. a compression spring; 66. a chute; 67. a spherical groove; 68. a transition groove; 69. a magnet; 71. a wave-shaped wall; 72. an elastic wave block; 73. connecting blocks; 74. a boss portion; 75. a circular hole; 76. an opening; 77. inserting a block; 78. positioning blocks; 81. blocking edges; 82. connecting columns; 83. a connecting strip; 84. a threaded hole; 85. and (4) a notch.

Detailed Description

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

An office chair comprises a chair frame 1, a chair seat 2 fixed on the chair frame 1, and a chair back fixed on the chair frame 1, wherein the upper end of the chair back is provided with a back cushion 5.

The chair back comprises a chair back frame 31 and a chair back cushion 32, the chair back frame 31 is fixed with the chair frame 1, two ends of one side of the chair back frame 31, which faces back to the chair back cushion 32, are fixed with mounting rods 33, and the mounting rods 33 are C-shaped structures. The mounting rod 33 is fixed with a mounting rack 34, the massager 4 is fixed on the mounting rack 34, the soft cloth 35 which coats the massager 4 is fixed on the mounting rack 34, the soft cloth 35 is abutted against the chair back cushion 32, and the chair back cushion is made of mesh cloth.

The massager 4 comprises a mounting shell 41 fixed on the mounting frame 34, a motor (not shown) fixed in the mounting shell 41, an eccentric wheel 42 fixed on an output shaft of the motor, a massage plate 43 arranged outside the mounting shell 41 and close to the soft cloth 35, wherein the massage plate 43 is in an outward convex arc shape, a butt block 44 is fixed on the massage plate 43, the butt block 44 is in butt joint with the eccentric wheel 42, a guide rod 45 is fixed on the massage plate 43, the guide rod 45 is inserted into a guide groove of the mounting shell 41, a return spring 46 is arranged in the guide groove, and two ends of the return spring 46 are respectively fixed with the mounting shell 41 and the guide rod 45. The motor is started to drive the eccentric wheel 42 to rotate, the eccentric wheel 42 pushes the abutting block 44 to drive the massage plate 43 to protrude outwards, and the massage plate is reset by the reset spring 46.

The headrest 5 comprises a fixed block 51 fixed on the backrest frame 31, a sliding block 52 in sliding fit with the fixed block 51, a connecting plate 53 fixedly connected with the sliding block 52, and a pillow 54 fixed on the connecting plate 53.

The fixed block 51 comprises a C-shaped frame 61 and a T-shaped slide block 62 fixed on the C-shaped frame 61, and the top of the backrest frame 31 passes through a C-shaped opening of the C-shaped frame 61 and is fixed through a bolt. The sliding block 52 is provided with a sliding groove 66 with a T-shaped cross section, the upper end of the sliding groove 66 penetrates through the lower end and is sealed, one surface of the T-shaped sliding block 62 facing the sliding groove 66 is provided with a circular groove 63, the circular groove 63 is provided with a blocking column 64 in a sliding mode, and a compression spring 65 is arranged between the blocking column 64 and the circular groove 63. The groove bottom of the sliding groove 66 is provided with a plurality of spherical grooves 67, the spherical grooves 67 are arranged along the sliding direction of the T-shaped sliding block 62, a transition groove 68 is arranged between two adjacent spherical grooves 67, the transition groove 68 is communicated with the two adjacent spherical grooves 67, and the depth of the transition groove 68 is smaller than that of the spherical groove 67. One end of the blocking post 64 abutting against the spherical groove 67 is arc-shaped and is fitted to the spherical groove 67. A magnet 69 is embedded in the T-shaped sliding block 62, and the magnet 69 and the blocking column 64 are magnetically attracted, wherein except the magnet 69 and the blocking column 64 are iron, and the rest part of the headrest 5 is made of plastic. The magnetism of the magnet 69 and the blocking post 64 is always smaller than the outward elastic force given to the blocking post 64 by the compression spring 65. The inner wall of the T-shaped sliding groove 66 close to the C-shaped frame 61 is provided with a wavy wall 71, the surface of the T-shaped sliding block 62 opposite to the wavy wall 71 is provided with a corresponding elastic wavy block 72, the elastic wavy block 72 is made of rubber, and the elastic wavy block 72 and the wavy wall 71 are arranged in a clearance mode.

A connecting block 73 is fixed at the bottom of one side of the sliding block 52 far away from the T-shaped sliding block 62, a protruding part 74 is formed at one end of the connecting block 73 far away from the sliding block 52, and a circular hole 75 is formed in the connecting block 73; the connecting plate 53 is in an inverted U-shape, and the connecting plate 53 includes an inner layer 531 and an outer layer 532, the outer layer 532 is fixed above the inner layer 531, the inner layer 531 is provided with an opening 76, and the outer layer 532 is fixed with an insertion block 77 inserted into the opening 76. The top of the sliding block 52 is fixed with two positioning blocks 78, the inserting block 77 extends between the two positioning blocks 78, the pillow 54 is fixed on the outer layer 532 through bolts, the shape of the pillow 54 is an arc structure similar to the outer layer 532, and the specific shape of the pillow 54 can be changed according to requirements. Two flanges 81 are fixed on one side of the bottom of the inner layer 531, which is far away from the outer layer 532, a connecting column 82 is fixed between the two flanges 81, a connecting strip 83 is arranged between the connecting column 82 and the connecting plate 53, a threaded hole 84 is formed in the bottom of the connecting column 82, the threaded hole 84 is aligned with the round hole 75, and a bolt penetrates through the round hole 75 to be connected with the threaded hole 84 of the connecting column 82; the connecting strip 83 is provided with a notch 85 corresponding to the protruding part 74.