CN113679196B

CN113679196B - office chair

Info

Publication number: CN113679196B
Application number: CN202111137534.5A
Authority: CN
Inventors: 李别军; 刘云鹏; 王南侠; 梁海军
Original assignee: Zhejiang Kanuo Office Furniture Co ltd
Current assignee: Zhejiang Kanuo Office Furniture Co ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2023-12-01
Anticipated expiration: 2041-09-27
Also published as: CN113679196A

Abstract

The invention provides an office chair, which comprises a chair frame, a chair seat and a chair back, wherein a headrest 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 comprises a C-shaped frame and T-shaped sliding blocks fixed on the C-shaped frame, sliding grooves with the cross section of T-shaped are formed in the sliding blocks, round grooves are formed in one faces of the T-shaped sliding blocks facing the sliding grooves, blocking columns are arranged in a sliding mode, compression springs are arranged between the blocking columns and the round grooves, ball grooves are formed in the bottoms of the sliding grooves, a plurality of ball grooves are formed in the sliding direction of the T-shaped sliding blocks, transition grooves are formed between two adjacent ball grooves, magnets are embedded in the T-shaped sliding blocks, the magnets attract the blocking columns, the magnets and the blocking columns are always smaller than the outward elasticity of the compression springs, the T-shaped sliding grooves are close to the inner walls of the C-shaped frame and are arranged as wavy walls, corresponding elastic wavy blocks are arranged on the faces of the sliding blocks opposite to the wavy walls, and gaps between the elastic wavy blocks and the wavy walls are arranged.

Description

Office chair

Technical Field

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

Background

Office chairs are necessary tools for brain workers to work, and when the office chairs work in a sitting posture for a long time, cervical vertebra diseases are often affected due to overfatigue of the cervical vertebra, and the cervical vertebra cannot rest all the time in the working process is one of main reasons. When sitting workers rest or think, the sitting workers can lean backwards on the backrest of the chair, and the backrest of the common chair can only make the back rest, but not make the neck rest.

Therefore, part of office chairs are provided with a headrest to meet the demands.

Disclosure of Invention

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

The technical aim of the invention is realized by the following technical scheme: office chair, chair frame, the seat support of fixing on the chair frame, the back of the chair of fixing on the chair frame, back of the chair upper end installs 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 to be closed, a circular groove is formed in one surface of the T-shaped sliding block facing the sliding groove, a blocking column is arranged in a sliding mode, a compression spring is arranged between the blocking column and the circular groove, ball grooves are formed in the groove bottom of the sliding groove, a plurality of ball grooves are formed in the sliding direction of the T-shaped sliding block, transition grooves are formed between two adjacent ball grooves, the depth of the transition grooves is smaller than that of the ball grooves, a magnet is embedded in the T-shaped sliding block, the magnet is attracted with the blocking column, the magnetism of the magnet and the blocking column is always smaller than that of the compression spring, the inner wall of the T-shaped sliding groove, which is close to the C-shaped frame, is provided with a corresponding elastic wave block, and the wave block are arranged on the surface of the sliding block opposite to the wave wall, and the wave block are arranged in a gap.

In normal sitting, the head has not only a rearward force on the headrest, but also a partial downward force. Because the back acting force to the headrest makes the sliding block move backwards, the wavy wall and the elastic wavy block are extruded to make the friction force between the sliding block and the wavy wall be enough, and the downward force is applied to the headrest at the moment, but the friction force is larger than the downward force, and the sliding block is matched with the blocking column through the spherical groove, so that the use of the headrest is stable. When height-adjusting is needed, the headrest is pushed inwards to enable the elastic wave block to be arranged with the wavy wall in a clearance mode, at the moment, although the compression spring is further compressed, the compression spring is used for increasing the outward thrust of the blocking column, due to the effect of the magnet, the inward pulling force of the blocking column is given, therefore, the friction force between the blocking column and the spherical groove is hardly changed, only the friction force between the blocking column and the spherical groove is needed when the headrest is lifted, lifting is facilitated, the friction force between the elastic wave block and the wavy wall is additionally increased when a person sits down, the use is reliable, and the headrest cannot move due to downward acting force of the head. The acting force of the compression spring on the blocking column is not enough to push the sliding block to translate so as to change the gap between the elastic wave block and the wavy wall, and artificial acting force is needed. 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, one end of the blocking column, which is abutted with the spherical groove, is arc-shaped and is attached to the spherical groove.

The sliding block is further arranged, a connecting block is fixed at the bottom of one side, far away from the T-shaped sliding block, of the sliding block, a protruding part is formed at one end, far away from the sliding block, of the connecting 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 to be connected with the threaded hole of the connecting column; and a notch corresponding to the protruding part is formed in the connecting strip.

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 insertion block with an insertion opening is fixed on the outer layer.

The pillow is characterized in that the 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.

Further set up, 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, back of the chair frame is fixed with the installation pole in the both ends of back of the chair cushion one side dorsad, fixed mounting bracket on the installation pole, be fixed with the massager on the mounting bracket, be fixed with the soft cloth including with the massager cladding on the mounting bracket, soft cloth butt back of the chair cushion.

The massager comprises a mounting shell, a motor fixed in the mounting shell, an eccentric wheel fixed on an output shaft of the motor, and a massage plate arranged outside the mounting shell and close to soft cloth, wherein an abutting block is fixed on the massage plate and abuts against the eccentric wheel, a guide rod is fixed on the massage plate and inserted into a guide groove of the mounting shell, a spring is arranged in the guide groove, and two ends of the spring are respectively fixed with the mounting shell and the guide rod.

In summary, the invention has the following beneficial effects: the back rest can massage the back, and the headrest can also be adjusted in height, so that the back rest is comfortable.

Drawings

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

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

FIG. 3 is a schematic diagram of a slider structure;

FIG. 4 is a schematic diagram of a slider;

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

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

FIG. 7 is a schematic view of the inside construction;

FIG. 8 is an enlarged view of a portion of FIG. 7;

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

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

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

fig. 12 is a schematic diagram of the connection of the slider block to the fixed block.

Reference numerals: 1. a chair frame; 2. a seat; 31. a chair back frame; 32. back cushion of chair back; 33. a mounting rod; 34. a mounting frame; 35. soft cloth; 4. a massage device; 41. a mounting shell; 42. an eccentric wheel; 43. a massage plate; 44. an abutment block; 45. a guide rod; 46. a return spring; 5. a headrest; 51. a fixed block; 52. a sliding block; 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 column; 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. a connecting block; 74. a boss; 75. a round hole; 76. an opening; 77. an insert block; 78. a positioning block; 81. a flange; 82. a connecting column; 83. a connecting strip; 84. a threaded hole; 85. and (5) a notch.

Detailed Description

The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.

An office chair comprises a chair frame 1, a chair seat 2 fixed on the chair frame 1, a chair back fixed on the chair frame 1, and a headrest 5 arranged at the upper end of the chair back.

The chair back comprises a chair back frame 31 and a chair back cushion 32, wherein the chair back frame 31 is fixed with the chair frame 1, mounting rods 33 are fixed at two ends of one side of the chair back frame 31, which is opposite to the chair back cushion 32, and the mounting rods 33 are of a C-shaped structure. The mounting rod 33 is fixedly provided with a mounting frame 34, the mounting frame 34 is fixedly provided with a massager 4, the mounting frame 34 is fixedly provided with a soft cloth 35 wrapping the massager 4, the soft cloth 35 is abutted against the back cushion 32, and the back cushion is 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, and 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 outwards convex arc shape, an abutting block 44 is fixed on the massage plate 43, the abutting block 44 abuts against 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 reset spring 46 is arranged in the guide groove, and two ends of the reset 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 virtue of the reset spring 46.

The headrest 5 comprises a fixed block 51 fixed on the chair back 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 fixing block 51 includes a C-shaped frame 61 and a T-shaped slider 62 fixed to the C-shaped frame 61, and the top of the seatback frame 31 passes through the C-shaped opening of the C-shaped frame 61 and is fixed by bolts. 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 is communicated with the lower end of the sliding groove to be closed, 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 ball grooves 67 are formed in the groove bottoms of the sliding grooves 66, the ball grooves 67 are arranged in a plurality along the sliding direction of the T-shaped sliding blocks 62, transition grooves 68 are formed between two adjacent ball grooves 67, the transition grooves 68 are communicated with the two adjacent ball grooves 67, and the depth of the transition grooves 68 is smaller than that of the ball grooves 67. One end of the blocking post 64 abutting against the spherical groove 67 is arc-shaped and is attached to the spherical groove 67. The T-shaped slide block 62 is embedded with a magnet 69, and the magnet 69 is magnetically attracted with the blocking post 64, wherein the blocking post 64 is iron except the magnet 69, and the rest of the headrest 5 is 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 chute 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.

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 convex part 74 is formed at one end of the connecting block 73 far away from the sliding block 52, and a round hole 75 is formed in the connecting block 73; the connecting plate 53 is in an inverted U shape, the connecting plate 53 comprises an inner layer 531 and an outer layer 532, the outer layer 532 is fixed above the inner layer 531, an opening 76 is formed in the inner layer 531, and an insertion block 77 for inserting the opening 76 is fixed on the outer layer 532. Two positioning blocks 78 are fixed on the top of the sliding block 52, an 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 of an arc-shaped 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 at one side of the bottom of the inner layer 531 far away from the outer layer 532, a connecting column 82 is fixed between the two flanges 81, a connecting bar 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 boss 74.

Claims

1. Office chair, chair frame, the seat support of fixing on the chair frame, the back of the chair of fixing on the chair frame, back of the chair upper end installs 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 to be closed, a circular groove is formed in one surface of the T-shaped sliding block facing the sliding groove, a blocking column is arranged in a sliding mode, a compression spring is arranged between the blocking column and the circular groove, ball grooves are formed in the groove bottom of the sliding groove, a plurality of ball grooves are formed in the sliding direction of the T-shaped sliding block, transition grooves are formed between two adjacent ball grooves, the depth of the transition grooves is smaller than that of the ball grooves, a magnet is embedded in the T-shaped sliding block, the magnet is attracted with the blocking column, the magnetism of the magnet and the blocking column is always smaller than that of the compression spring, the inner wall of the T-shaped sliding groove, which is close to the C-shaped frame, is provided with a corresponding elastic wave block, and the wave block are arranged on the surface of the sliding block opposite to the wave wall, and the wave block are arranged in a gap.

2. An office chair according to claim 1, wherein: and one end of the blocking column, which is abutted against the spherical groove, is arc-shaped and is attached to the spherical groove.

3. An office chair according to claim 1, wherein: a connecting block is fixed at the bottom of one side, far away from the T-shaped sliding block, of the sliding block, a protruding part is formed at one end, far away from the sliding block, of the connecting 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 to be connected with the threaded hole of the connecting column; and a notch corresponding to the protruding part is formed in the connecting strip.

4. An office chair according to 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 insertion block for inserting the opening is fixed on the outer layer.

5. An office chair according to claim 4, wherein: the top of the sliding block is fixedly provided with two positioning blocks, the insertion block extends between the two positioning blocks, and the pillow is fixed on the outer layer.

6. An office chair according to claim 1, wherein: the chair back comprises a chair back frame and a chair back cushion, wherein the chair back frame is fixed with the chair frame, mounting rods are fixed at two ends of one side of the chair back frame, which is opposite to the chair back cushion, of the chair back frame, a mounting frame is fixed on the mounting rods, a massager is fixed on the mounting frame, soft cloth wrapping the massager is fixed on the mounting frame, and the soft cloth is abutted to the chair back cushion.

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