CN216147625U

CN216147625U - Office chair

Info

Publication number: CN216147625U
Application number: CN202122063922.5U
Authority: CN
Inventors: 周根富; 黄喻贤
Original assignee: Zhejiang Baizhijia Furniture Co Ltd
Current assignee: Zhejiang Baizhijia Furniture Co Ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-04-01
Anticipated expiration: 2031-08-30

Abstract

The utility model discloses an office chair which comprises a chair seat, a chair back and two handrails, wherein the chair back is fixed on the chair seat, the two handrails are arranged on the front side and the rear side of the chair back in a swinging manner, each handrail comprises a cover plate, a handrail arm and a handrail plate, the top of each handrail arm is fixed on the handrail plate, the bottom of each handrail arm is arranged on the chair back in a swinging manner, an embedded bolt made of a metal material is fixed on the handrail plate, the threaded section of the embedded bolt is positioned above the handrail plate, a lock hole is formed in the cover plate, a sheet is fixed in the lock hole, and the inner side of the sheet is in a multi-sheet petal shape and has elasticity; the thread section of the embedded bolt is inserted into the lock hole and penetrates through the sheet, and the petal-shaped structure in the sheet is clamped on the thread of the embedded bolt, so that the cover plate is fixed. The armrests are arranged on two sides of the chair back in a swinging mode, so that the chair seat can be placed below the table top to the maximum extent, and the requirements of places are met. The connection strength of the cover plate and the handrail is increased by the embedded bolts when the handrail is formed; lead to thin slice and pre-buried bolt joint for the cartridge is not fragile.

Description

Office chair

Technical Field

The utility model relates to the field of home furnishing, in particular to an office chair.

Background

The existing office chair armrest structure type is a fixed type, a lifting type or an armrest-free structure, the fixed type armrest has a certain height, cannot be changed, and cannot push a chair below a desktop, so that the office chair is disordered and disorderly in office places requiring 6S. Patent publication No. CN 210919680U discloses an office chair armrest and an office chair, comprising an armrest body, a concave space arranged above the armrest body; the cover plate is used for connecting the surface layer of the handrail and is fixed above the handrail body; a plurality of connecting columns are arranged in the concave space, a plurality of connecting jacks matched with the connecting columns are correspondingly arranged on the cover plate, and the connecting columns and the handrail body are connected into a whole; and the whole structure formed by connecting the connecting column and the handrail body is of a plastic structure. In the patent, because the handrail body and the connecting column are of an integrated plastic structure, when the chair falls down, the connecting column is easy to break, and the whole handrail needs to be replaced in the maintenance process; the connecting column is also easily broken when the cover plate is replaced. This increases the maintenance cost, which is not easy to disassemble.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, an object of the present invention is to provide an office chair in which armrests can be retracted and which is easily disassembled for maintenance.

In order to achieve the purpose, the utility model adopts the following technical scheme: the chair comprises a chair seat, a chair back and two handrails, wherein the chair back is fixed on the chair seat, the two handrails are arranged on the front side and the rear side of the chair back in a swinging manner, the handrails comprise cover plates, armrest arms and armrest plates, the tops of the armrest arms are fixed on the armrest plates, the bottoms of the armrest arms are arranged on the chair back in a swinging manner, embedded bolts made of metal materials are fixed on the armrest plates, threaded sections of the embedded bolts are positioned above the armrest plates, locking holes are formed in the cover plates, thin sheets are fixed in the locking holes, and the inner sides of the thin sheets are in a multi-sheet petal shape and have elasticity; during installation, the threaded section of the embedded bolt is inserted into the lock hole and penetrates through the sheet, and the petal-shaped structure in the sheet is clamped on the threads of the embedded bolt, so that the cover plate is fixed.

Preferably, the number of the embedded bolts on each armrest plate is two, the two embedded bolts are arranged in the left-right direction, two locking holes are formed in each cover plate, and the two locking holes are arranged in the left-right direction. Therefore, the accuracy of the positions of the cover plate and the armrest plate is ensured.

Preferably, the armrests are rotatably installed on the chair back, the front side and the rear side of the chair back are protruded with limit parts, the armrests are provided with arc-shaped limit grooves, and the limit parts are inserted into the limit grooves and are in sliding fit with the limit grooves. Thus, the swing range of the armrest is defined by a simple structure.

Preferably, the back of the chair is raised to have first rib, and the spacing inslot is raised to have the second rib, and first rib inserts the spacing inslot and sliding fit, and when the handrail was packed up the back, first rib and the friction of second rib were contradicted, prevented that the handrail from falling back.

Preferably, the front side and the rear side of the chair back are respectively provided with a protruding positioning part, the side surfaces of the two positioning parts, which are far away from each other, are provided with a protruding clamping block, the armrest is provided with a positioning hole, the front direction and the rear direction of the positioning hole penetrate through the armrest arm, the positioning hole is a stepped hole, and one end of the positioning hole, which has a larger cross section, is positioned at the outer side; the positioning portion is inserted into the positioning hole of the armrest, part of the section of the clamping block on the positioning portion is located in the positioning hole outer side section, the clamping block is sleeved with a non-rotatable blocking piece, the blocking piece is located in the positioning hole outer side section, the thickness of the blocking piece is not smaller than that of the clamping block extending into the outer side end of the positioning hole, the blocking piece is abutted to the positioning hole through the locking bolt, and the locking bolt is in threaded connection with the seat back. Therefore, the clamping connection of the clamping block and the blocking piece ensures that the blocking piece cannot rotate along with the overturning of the handrail when the handrail is overturned, so that the locking bolt cannot rotate and the connection reliability is ensured; meanwhile, the locking bolt supports against the stop piece to provide a certain pre-tightening force for the handrail, so that the handrail cannot turn over at the current position.

Preferably, the chair back is provided with a height-adjustable lumbar support. Therefore, effective support can be provided for the waist, and the comfort of the chair is improved.

Preferably, the waist rest is in sliding fit with the chair back, a plurality of adjusting grooves are formed in the chair back, the adjusting grooves are arranged up and down, and the waist rest is fixed at the adjusting grooves at any height through the elastic clamping pieces. Thus, the height of the waist support can be conveniently and quickly adjusted

Preferably, the chair further comprises chair legs, an air rod and a tray, wherein the air rod is fixed on the chair legs, the tray is used for fixing the top of the air rod, an operating rod for controlling the air rod to lift is installed on the tray, and the chair seat is fixed above the tray. Therefore, the chair is convenient to move and the chair seat is convenient to lift.

Due to the adoption of the technical scheme, the chair is different from the traditional mode that the armrests are arranged on the chair seat, and the armrests are arranged on the two sides of the chair back in a swinging mode, so that the chair seat can be placed below the desktop to the maximum extent, and the requirements on places such as 6S places are met. In the scheme, the connection strength of the cover plate and the handrail is increased in a bolt pre-embedding mode during handrail forming; the joint of slice and pre-buried bolt screw thread section for apron and handrail easy dismounting, also more reliable safety.

Drawings

FIG. 1 is a schematic view of an office chair;

FIG. 2 is an exploded view of the chair with the legs and air bars removed;

FIG. 3 is a schematic view of the connection structure of the armrests and the chair back;

FIG. 4 is an enlarged view taken at A in FIG. 3;

FIG. 5 is an exploded view of the armrest;

FIG. 6 is a first schematic structural diagram of the first limiting plate;

FIG. 7 is a second schematic structural diagram of the first limiting plate;

fig. 8 is a schematic view of a connection structure of the cover plate and the sheet.

Reference numerals: 1. chair legs; 2. a gas lever; 3. a tray; 4. a chair seat; 41. a seat plate; 42. soft packing; 5. a chair back; 51. a positioning part; 52. a clamping block; 53. a threaded hole; 54. a limiting part; 55. a first reinforcing portion; 6. a waist support; 61. a support portion; 62. a second limiting plate; 63. a first limit plate; 631. a fixed part; 632. a placing groove; 634. an elastic card; 64. a support plate; 66. An adjustment groove; 7. a handrail; 71. a handrail plate; 72. embedding bolts in advance; 73. supporting the arm; 74. a cover plate; 75. a lock hole; 76. a sheet; 77. positioning holes; 78. a limiting groove; 79. a second reinforcement portion; 81. a baffle plate; 82. a card slot; 83. a gasket; 84. locking the bolt; 85. a plugging plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" 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 defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

An office chair as shown in fig. 1 comprises a chair seat 4, a chair back 5, armrests 7, a tray 3, an air rod 2 and chair legs 1, wherein the chair legs are 1 five-star legs, the air rod 2 is fixed on the chair legs 1 and vertically extends upwards, the top section of the air rod 2 is a telescopic end, the top of the air rod 2 is fixed on the tray 3, an operating rod for controlling the air rod to ascend and descend is installed on the tray 3, the chair seat 4 is installed above the tray 3, the chair back 5 is fixedly installed on the chair seat 4, the number of the armrests 7 is two, the two armrests 7 are installed on the front side and the rear side of the chair back 5 in a swinging mode, the chair seat 4 comprises a seat board 41 and soft packages 42, and the soft packages 42 are fixed on the seat board 41; the chair back 5 is provided with a waist support 6 with adjustable height.

In the embodiment, as shown in fig. 2-5, the armrest 7 includes a cover plate 74, an armrest arm 73 and an armrest plate 71 for supporting the arm, the armrest arm 73 is fixed at the bottom of the armrest plate 71, and the armrest arm 73 is installed on the side of the seat back 5 in a swinging manner; the cover plate 74 is detachably mounted on the armrest plate 71, the armrest plate 71 is provided with embedded bolts 72, and the thread sections of the embedded bolts 72 extend upwards out of the armrest plate 71; as shown in fig. 8, the cover plate 74 is provided with a lock hole 75, the lock hole 75 vertically penetrates the cover plate 74, a sheet 76 is fixed in the lock hole 75, the inner side of the sheet 76 is in a flap shape, and the sheet 76 has elasticity. The cover plate 74 is only required to be buckled on the armrest plate 71, the thread section of the embedded bolt 72 penetrates through the thin sheets 76, and the thin sheets 76 are clamped on the threads of the embedded bolt 72 through the petal-shaped structures. Furthermore, two embedded bolts 72 are arranged on each handrail plate 71 in the left-right direction; the locking hole 75 and the tab 76 of each cover plate 74 are provided in two and right and left directions. In this embodiment, the embedded screws 72 are installed on the corresponding molds before the injection molding of the armrest plate 71, so that the embedded screws 72 are fixed on the armrest plate 71. The embedded screws 72 are made of metal.

As shown in fig. 4, a positioning portion 51, two limiting portions 54 and two first reinforcing portions 55 are respectively protruded from the front side and the rear side of the seat back 5, and the limiting portions 54 and the positioning portion 51 are both cylindrical; a clamping block 52 protrudes from the end surface of the positioning part 51, a threaded hole 53 extending towards the chair back 5 is formed in the clamping block 52, a first reinforcing part 55 is fixedly connected with a limiting part 54, and the thickness of the first reinforcing part 55 is smaller than the height of the limiting part 54; the armrest arm 73 is provided with a positioning hole 77, the positioning hole 77 penetrates through the armrest arm 73 in the front-back direction, the positioning hole 77 is a stepped hole, and the end with the larger cross section in the positioning hole 77 is positioned on the outer side; two limit grooves 78 are formed in one side, close to the chair back 5, of the two armrest arms 73, the limit grooves 78 are waist-shaped grooves, the central line of the overall longitudinal section of each limit groove 78 is arc-shaped, and the two limit grooves 78 located on the same side are concentric with the positioning hole 77; a second reinforcing part 79 protrudes from the limiting groove 78; the blocking block 52 is sleeved with a blocking piece 81 and can not rotate mutually, the blocking piece 81 is provided with a blocking slot 82, the blocking slot 82 penetrates through the blocking piece in the front-back direction, the blocking piece 81 is located in the outer section of the positioning hole 77, and the longitudinal section of the blocking piece 81 is larger than that of the inner section of the positioning hole 77. When the armrest is installed, the positioning part 51 on the chair back 5 is inserted into the positioning hole 77 of the armrest 7, wherein part of the section of the fixture block 58 on the positioning part 51 is positioned in the outer section of the positioning hole 77; the stopper portion 57 is inserted into the stopper groove 78 and slidably fitted, and the first reinforcing portion 55 is inserted into the stopper groove 78 and slidably fitted; the blocking piece 81 is sleeved on the fixture block 52, the thickness of the blocking piece 81 is not smaller than that of the fixture block 58 extending into the outer side end of the positioning hole 77, the gasket 83 is sleeved on the locking bolt 84, the locking bolt 84 is in threaded connection with the threaded hole 53, and the armrest 7 is further mounted on the chair back 5. The outer sides of the two handrails 7 are fixedly provided with plugging plates 85, and the positioning holes 77 are plugged by the plugging plates 85.

When the armrest 7 is used, the armrest plate 71 and the cover plate 74 are placed in the left-right direction and pressed against the stopper 54 through one end of the second stopper groove 58, thereby preventing the armrest 7 from being turned downward. When the handrail 7 is retracted, the handrail plate 71 is held and lifted, the handrail plate 71 drives the handrail arm 73 to turn rightwards, and the handrail arm 73 drives the second reinforcing part 79 at the bottom of the handrail plate to turn rightwards, so that the outer side surfaces of the two first reinforcing parts 55 at the front side and the rear side of the chair back 5 and the second reinforcing part 79 in the handrail upper limiting groove 78 are mutually rubbed and abutted; thereby ensuring that the armrest 7 is dropped without applying an external force to the armrest 7.

In this embodiment, as shown in fig. 2, 6 and 7, the lumbar support 6 includes a support plate 64 and a first limiting plate 63, the first limiting plate 63 is located at the rear side of the support plate 64, the first limiting plate 63 protrudes with two fixing portions 631 extending leftward, the two fixing portions 631 are arranged in the front-rear direction, and the support plate 64 is fixedly connected with the two fixing portions 631 through fasteners; an extended supporting part 61 protrudes from the chair back 5, a second limiting plate 62 is fixedly mounted on the front side of the supporting part 61, a locking groove is formed in the rear side of the second limiting plate 62, and the locking groove penetrates through the second limiting plate 62 in the front-rear direction; the first limit plate 63 passes through the locking groove in the front-back direction and is in sliding fit with the locking groove in the up-down direction, and the second limit plate 62 is positioned between the two fixing parts 631; a mounting groove 632 is formed at the rear side of the first position-limiting plate 63, an elastic clamping piece 634 is fixed in the mounting groove 632, the elastic clamping piece 634 is bent to form a convex middle part, and a middle section of the elastic clamping piece 634 is located at the outer side of the mounting groove 632; a plurality of adjusting grooves 66 are recessed on the front side surface of the supporting portion 61, and the plurality of adjusting grooves 66 are arranged in the vertical direction; the middle section of the elastic clip 634 can press against any one of the adjustment slots 66, thereby fixing the height of the lumbar support 6.

When the height of the waist support 6 is adjusted: the supporting plate 64 is pulled or pressed by force, the supporting plate 64 drives the first limiting plate 63 to move, and the first limiting plate 63 drives the elastic clamping piece 634 to move; during the movement of the elastic clamp 634, the end wall of the adjustment slot 66 pushes the elastic clamp 634 to move out of the currently located adjustment slot 66, and at this time, the elastic clamp 634 is accumulated; when the lumbar support 6 is adjusted to a desired height, no force is applied to the support plate 64, the elastic clamping pieces 634 are released, and the middle sections of the elastic clamping pieces 634 press against the adjustment grooves 66 of the current height, so that the height of the lumbar support 6 is fixed.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.

Claims

1. The utility model provides an office chair, includes seat support (4), back of the chair (5) and two handrail (7), and back of the chair (5) are fixed on seat support (4), its characterized in that: the two handrails (7) are arranged on the front side and the rear side of the chair back (5) in a swinging mode, each handrail (7) comprises a cover plate (74), a handrail arm (73) and a handrail plate (71), the top of each handrail arm (73) is fixed on each handrail plate (71), the bottom of each handrail arm (73) is arranged on the chair back (5) in a swinging mode, embedded bolts (72) made of metal materials are fixed on each handrail plate (71), the thread sections of the embedded bolts (72) are located above the corresponding handrail plates (71), locking holes (75) are formed in the cover plates (74), thin sheets (76) are fixed in the locking holes (75), and the inner sides of the thin sheets (76) are in multi-sheet petal shapes and have elasticity; the thread section of the embedded bolt (72) is inserted into the lock hole (75) and penetrates through the sheet (76), and the petal-shaped structure in the sheet (76) is clamped on the thread of the embedded bolt (72), so that the cover plate (74) is fixed.

2. An office chair as claimed in claim 1, wherein: two embedded bolts (72) are arranged on each armrest plate (71), the two embedded bolts (72) are arranged in the left-right direction, two lock holes (75) are formed in each cover plate (74), and the two lock holes (75) are arranged in the left-right direction.

3. An office chair as claimed in claim 1, wherein: the armrest (7) is rotatably arranged on the chair back (5), the front side and the rear side of the chair back (5) are raised with limit parts (54), the armrest (7) is provided with an arc-shaped limit groove (78), and the limit parts (54) are inserted into the limit groove (78) and are in sliding fit.

4. An office chair as claimed in claim 3, wherein: the protruding first rib (55) that has on back of the chair (5), protruding second rib (79) that has in spacing groove (78), first rib (55) insert spacing groove (78) and sliding fit, pack up the back when handrail (7), and first rib (55) and second rib (79) friction are contradicted, prevent that handrail (7) from falling back.

5. An office chair as claimed in claim 1, wherein: the front side and the rear side of the chair back (5) are respectively provided with a positioning part (51) in a protruding manner, the side surfaces, far away from each other, of the two positioning parts (51) are provided with a clamping block (52) in a protruding manner, the armrest (7) is provided with a positioning hole (77), the positioning hole (77) penetrates through the armrest arm (73) in the front-rear direction, the positioning hole (77) is a stepped hole, and one end, with a larger cross section, of the positioning hole (77) is positioned on the outer side; the positioning part (51) is inserted into a positioning hole (77) of the armrest (7), wherein part of the section of a clamping block (52) on the positioning part (51) is positioned in the outer side section of the positioning hole (77), a non-rotatable blocking piece (81) is sleeved on the clamping block (52), the blocking piece (81) is positioned in the outer side section of the positioning hole (77), the thickness of the blocking piece (81) is not smaller than that of the clamping block (52) extending into the outer side end of the positioning hole (77), the blocking piece (81) is tightly abutted to the positioning hole (77) through a locking bolt (84), and the locking bolt (84) is in threaded connection with the chair back (5).

6. An office chair as claimed in claim 1, wherein: the chair back (5) is provided with a waist rest (6) with adjustable height.

7. An office chair as claimed in claim 6, wherein: waist leans on (6) and back of the chair (5) sliding fit, is equipped with a plurality of adjustment tank (66) on back of the chair (5), and a plurality of adjustment tank (66) arrange from top to bottom, and waist leans on (6) to be fixed in adjustment tank (66) department of arbitrary height through elasticity card (634).

8. An office chair as claimed in claim 1, wherein: still include chair foot (1), gas pole (2) and tray (3), gas pole (2) are fixed on chair foot (1), and the top of tray (3) fixed gas pole (2) is installed the action bars that control gas pole (2) go up and down on tray (3), and seat support (4) are fixed in tray (3) top.