CN117617695A - Adjustable chair back and chair with adjustable chair back - Google Patents
Adjustable chair back and chair with adjustable chair back Download PDFInfo
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- CN117617695A CN117617695A CN202311585616.5A CN202311585616A CN117617695A CN 117617695 A CN117617695 A CN 117617695A CN 202311585616 A CN202311585616 A CN 202311585616A CN 117617695 A CN117617695 A CN 117617695A
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- chair back
- seat
- limiting
- chair
- lifting
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- 230000009471 action Effects 0.000 claims abstract description 18
- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 230000001276 controlling effect Effects 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000033001 locomotion Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000005484 gravity Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 206010050031 Muscle strain Diseases 0.000 description 1
- 206010049816 Muscle tightness Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Supports for the head or the back
- A47C7/40—Supports for the head or the back for the back
- A47C7/46—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
- A47C7/462—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/002—Chair or stool bases
- A47C7/004—Chair or stool bases for chairs or stools with central column, e.g. office chairs
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/002—Chair or stool bases
- A47C7/006—Chair or stool bases with castors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
The invention discloses an adjustable chair back and an adjustable chair back, which relate to the field of furniture design and manufacture, and the adjustable chair back provided by the invention have the advantages that when no external force acts, the chair back body is kept at the limit high position of a chair back supporting part through a lifting adjusting unit, and when a user uses the adjustable chair back, the self-adjustment of the height of the chair back body can be realized through the pressure generated on the lifting adjusting unit by leaning on the chair back body, so that the operation process is simple and convenient; the chair back body can be switched between a locking state and an unlocking state through the gesture limiting unit, when the chair back body is in the locking state, the current height of the chair back body is kept, and when the chair back body is in the unlocking state, the chair back body can be adjusted under the action of external force so as to meet the diversified requirements of users; the rotary adjustment and the displacement adjustment are combined, so that the adjustment range of the chair back body is effectively expanded, the adjustment process of the chair back body is more flexible, and the use feeling of a user is effectively improved.
Description
Technical Field
The invention relates to the field of furniture design and manufacture, in particular to an adjustable chair back and a chair with the adjustable chair back.
Background
The existing seat adjustable backrest in the market generally adopts a manual adjustment mode, after the backrest is adjusted in height every time, the backrest is relatively fixed, if the backrest is required to be adjusted, the backrest is required to be adjusted manually, the operation process is complicated, the backrest part is often adjusted only by lifting and lowering in a single dimension, the adjustable range is limited, the user can feel uncomfortable after sitting for a long time, and the comfort requirement of the user cannot be met.
Secondly, the existing office chair is provided with a reclining function, but the positions of a chair seat and a backrest of the existing office chair are fixed in structure or can be adjusted in a lifting manner, but the existing office chair cannot rotate or move along with a human body, so that the reclining process of the human body is only adjusted through the rotation of the angle of the chair back, the rotation track of the chair back and the rotation track of the human body in the reclining process are asynchronous, the back of the human body can displace with the chair back, the chair back cannot perfectly fit with the human body, the waist of the human body is usually in a suspended state, the waist of the human body cannot be effectively carried under the reclining posture of the chair, and the comfort is low.
Disclosure of Invention
The invention aims at: in order to solve the problems, the invention provides an adjustable chair back and a chair with the adjustable chair back, wherein the chair back body is kept at the limit high position of a chair back supporting part through a lifting adjusting unit under the action of no external force; the chair back body can be switched between a locking state and an unlocking state through the gesture limiting unit, when the chair back body is in the locking state, the current height of the chair back body is kept, and when the chair back body is in the unlocking state, the chair back body can be adjusted under the action of external force so as to meet the diversified requirements of users; the rotary adjustment and the displacement adjustment are combined, so that the adjustment range of the chair back body is effectively expanded, the adjustment process of the chair back body is more flexible, and the use feeling of a user is effectively improved.
The technical scheme adopted by the invention is as follows:
an adjustable chair back comprises a chair back body, a chair back supporting part, a lifting adjusting unit and a posture limiting unit; the lifting adjusting unit comprises a sliding groove, a sliding block and a lifting elastic supporting piece, wherein the sliding groove is formed in the seat back body/seat back supporting piece, the sliding block is arranged in the seat back supporting piece/seat back body, the sliding groove is matched with the sliding block, the lifting elastic supporting piece is arranged between the sliding groove and the sliding block, the lifting adjusting unit enables the seat back body to be kept at the limit high position of the seat back supporting piece through the lifting elastic supporting piece when no external force acts, and the lifting adjusting unit can enable the lifting elastic supporting piece to elastically deform under the action of the external force and drive the seat back body to be adjusted in a displacement mode between the limit high position and the limit low position relative to the seat back supporting piece; the seat back body is limited on the seat back supporting part by the gesture limiting unit, the gesture limiting unit comprises a limiting gear piece and a limiting locking piece, the limiting gear piece is matched with the length of the sliding groove, a plurality of adjusting gears are arranged on the limiting gear piece along the length direction, the limiting locking piece can be matched with any gear of the limiting gear piece to limit the seat back body on the seat back supporting part, the limiting gear piece is arranged on the seat back supporting part/seat back body, the limiting locking piece is arranged on the seat back body/seat back supporting part, when the gesture limiting unit is in a locking state, the limiting locking piece is matched with a certain gear of the limiting gear piece to limit the seat back body on the seat back supporting part, and when the gesture limiting unit is in an unlocking state, the limiting locking piece is separated from the limiting gear piece, and the seat back body can be adjusted relative to the seat back supporting part.
Further, the chair back body comprises a chair back lifting frame, a chair back upper frame matched with the back of a human body and a chair back lower frame matched with the waist of the human body, the chair back upper frame is assembled above the chair back lower frame, the chair back upper frame is fixedly connected with the chair back lifting frame, and the chair back lower frame is rotatably connected with the chair back lifting frame through a rotary adjusting unit; the chair back lifting frame is movably connected with the chair back supporting component through the lifting adjusting unit, and the chair back lifting frame can be limited on the chair back supporting component through the gesture limiting unit.
Further, the rotary adjusting unit comprises a rotary elastic supporting piece, the lower chair back frame is kept at the upward position through the rotary elastic supporting piece when no external force acts, the lower chair back frame can enable the rotary elastic supporting piece to elastically deform under the action of external force, and the lower chair back frame is driven to rotate and adjust between the upward position and the downward position.
Further, the rotary adjusting unit further comprises a hinge assembly, the lower chair back frame and the lifting chair back frame are rotatably connected through the hinge assembly, the rotary elastic supporting piece is a torsion spring, the torsion spring is sleeved on a rotary pin of the hinge assembly, and two supporting legs of the torsion spring respectively act on the lower chair back frame and the lifting chair back frame, so that the lower chair back frame keeps a upward position relative to the lifting chair back frame when no external force acts.
Further, the gear of the limiting gear piece is a limiting block matched with the limiting locking piece, and the limiting blocks are distributed along the length direction of the limiting gear piece; the limiting locking piece is provided with a clamping part with a U-shaped structure; the gesture limiting unit further comprises a regulating and controlling component, when the gesture limiting unit is in a locking state, the limiting locking piece can extend into the limiting gear piece under the action of the regulating and controlling component, the clamping part is clamped on the upper side and the lower side of the limiting block, the movement of the chair back body relative to the chair back supporting component is limited, when the gesture limiting unit is in an unlocking state, the limiting locking piece can be separated from the limiting gear piece under the action of the regulating and controlling component, and the position of the chair back body can be adjusted relative to the chair back supporting component.
Further, the regulation and control subassembly is circulation track button, circulation track button includes button, circulation track, organ jump ring and button seat, the button is located to the circulation track, circulation track includes locking gear and unlocking gear, organ jump ring one side is restricted in the button seat, and opposite side and circulation track match, be equipped with between button and the button seat and make the button be ejecting spring, joint portion and stopper matched opposite side assemble in the button, the button seat is installed in the back of the chair crane.
Further, the lifting adjusting units in pairs are respectively arranged at two sides of the gesture limiting unit, and the sliding chute of the lifting adjusting unit and the lifting elastic supporting piece are arranged in parallel with the limiting gear piece; the lifting elastic support piece can elastically deform along the length direction, and two ends of the lifting elastic support piece in the length direction are respectively connected with the chair back body and the chair back supporting part.
The chair with the adjustable chair back comprises the chair seat and the backrest support, and the adjustable chair back is rotatably connected with the chair seat through the backrest support.
Further, the seat comprises a seat surface and a base, wherein the seat surface is arranged on the base and is in sliding connection with the base through a seat surface adjusting device, a seat elastic support piece is arranged between the seat surface and the base, one side of the backrest support is hinged with the backrest support part, the other side of the backrest support is hinged to the seat surface through a first connecting support, one side of the backrest support part is provided with a backrest body, and the other side of the backrest support part is hinged to the backrest support.
Further, the chair also comprises a second connecting bracket and a third connecting bracket, wherein the second connecting bracket and the third connecting bracket are both arranged on the base, two ends of the third connecting bracket are respectively hinged with the chair seat and the second connecting bracket, and the third connecting bracket and the first connecting bracket are hinged at two opposite ends of the base; the two ends of the backrest support are respectively extended with a first cantilever and a second cantilever to form a C-shaped structure, the backrest support is hinged with the backrest support part through the first cantilever and is hinged with the base through the second cantilever, the second connecting support is provided with a positioning hole and a waist-shaped hole relative to the other end of the hinged third connecting support, the second cantilever is rotatably connected with the positioning hole relative to the other end of the connecting base through a first pin shaft and is slidably connected with the waist-shaped hole through a second pin shaft, and the first pin shaft is positioned between the chair seat and the second pin shaft.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. according to the invention, under the action of no external force, the chair back body is kept at the limit high position of the chair back supporting part through the lifting adjusting unit, when a user uses the chair back body, the self-adjusting of the height of the chair back body can be realized through generating pressure on the lifting adjusting unit by leaning of the chair back body, and the operation process is simple and convenient.
2. According to the invention, the chair back body can be switched between the locking state and the unlocking state through the gesture limiting unit, when the chair back body is in the locking point state, the current height of the chair back body is kept, and when the chair back body is in the unlocking state, the chair back body can be adjusted under the action of external force, so that the diversified requirements of users are met.
3. According to the invention, the rotation adjustment and the displacement adjustment are combined, so that the adjustment range of the chair back body is effectively expanded, the adjustment process of the chair back body is more flexible, and the use feeling of a user is effectively improved.
4. The chair back body is of a split type structure, and through the rotatable design of the lower frame of the chair back, a user can automatically adjust and attach to the waist of the user when the chair back is in a leaning state, so that the comfort level of the user is improved.
5. According to the invention, through the combination of the lifting adjusting unit and the rotatable design of the lower chair back frame, the height of the chair back body and the rotation angle of the lower chair back frame can be self-adjusted along with the change of the posture of a user in the backward leaning process of a user, the chair back body has a downward movement trend, the waist of a human body can be lifted, and the muscle tension and strain caused by long sitting of the waist can be effectively relieved.
6. The chair back body of the chair can form a movement trend of backward rotation in the process of reclining of a user, so that autonomous flexible adjustment is realized, and the reclining comfort level of the user is improved.
7. The chair back can rotate and displace along with a human body in the backward tilting process, and the chair seat can synchronously move forward, so that the displacement between the back of the human body and the chair back in the backward tilting process can be effectively avoided, the chair back can support the waist of the human body and the gravity center can move forward in the backward tilting state, the large-angle tilting can not be prevented from being turned backward, the waist of the human body can not be suspended, and the comfort of the waist of the human body can be improved.
Drawings
FIG. 1 is a schematic view of the structure of a seat of the present invention;
FIG. 2 is an exploded view of the adjustable seat back of the present invention;
FIG. 3 is a cross-sectional view of the invention in the unlocked state with the seatback body held in a limited elevation with respect to the area of FIG. 1A;
FIG. 4 is a cross-sectional view of the invention in the unlocked position and with the seatback body in the extreme low position under the influence of an external force, taken about the area of FIG. 1A;
FIG. 5 is a cross-sectional view of the chair back body of the present invention in a locked condition, taken about the area of FIG. 1A;
FIG. 6 is a cross-sectional view of the chair back body of the present invention in another height locked condition with respect to the area of FIG. 1A;
FIG. 7 is an exploded view of the chair back body of the present invention;
FIG. 8 is a schematic view of the chair back lifting frame of the present invention;
FIG. 9 is a schematic view of the structure of the seatback support member of the present invention;
FIG. 10 is a schematic structural view of a regulatory assembly of the present invention;
fig. 11 is a schematic view of the structure of the present invention in a reclined position.
The marks in the figure: the seat back support device comprises a 1-lifting adjusting unit, a 101-sliding groove, a 102-sliding block, a 103-lifting elastic support piece, a 2-gesture limiting unit, a 201-limiting gear piece, a 2021-limiting block, a 202-limiting locking piece, a 2022-clamping part, a 203-adjusting component, a 2031-key, a 2032-circulating track, a 2033-mechanism clamping spring, a 2034-button seat, a 3-seat back body, a 301-seat back lifting frame, a 302-seat back upper frame, a 303-seat back lower frame, a 4-rotation adjusting unit, a 401-rotation elastic support piece, a 402-hinging component, a 403-rotation pin, a 5-seat base, a 501-seat surface, a 502-base, a 6-seat back support, a 601-first cantilever, a 602-second cantilever, a 7-first connecting support, an 8-second connecting support, a 801-positioning hole, an 802-waist-shaped hole, a 9-third connecting support, a 10-seat back support component and a 11-rolling structure.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
An adjustable seatback, as shown in fig. 1 to 10, includes a seatback body 3 and a seatback support member 10, and further includes a lift adjusting unit 1 and an attitude restricting unit 2; the seat back body 3 is movably connected with the seat back supporting part 10 through the lifting adjusting unit 1, the lifting adjusting unit 1 comprises a sliding groove 101, a sliding block 102 and a lifting elastic supporting piece 103, the sliding groove 101 is arranged on the seat back body 3, the sliding block 102 is arranged on the seat back supporting part 10, the sliding groove 101 is matched with the sliding block 102, the lifting elastic supporting piece 103 is arranged between the sliding groove 101 and the sliding block 102, the lifting adjusting unit 1 enables the seat back body 3 to be kept at the limit high position of the seat back supporting part 10 through the lifting elastic supporting piece 103 when no external force acts, the sliding block 102 is positioned at the bottom end of the sliding groove 101, the lifting adjusting unit 1 can enable the lifting elastic supporting piece 103 to be elastically deformed under the external force and drive the seat back body 3 to be adjusted between the limit high position and the limit low position relative to the seat back supporting part 10, for example, when a user leans against the seat back body 3, downward pressure is generated on the tension spring, when the downward pressure is larger than the elasticity of the tension spring, the sliding groove 101 is stretched downwards, the sliding groove 102 is relatively moved downwards, the seat back body 3 is enabled to be preferably lowered, the height of the seat back body is enabled to be in a rolling connection with the sliding needle roller bearing 11, and the sliding structure is enabled to be connected with the sliding seat back body 102 in a flexible manner, and the sliding structure is enabled to be reduced, and the sliding friction is enabled to be easily ensured, and the sliding structure is enabled to be connected with the sliding is enabled to be easy, and the sliding is easy, and the rolling and is easy; the posture limiting unit 2 can limit the seat back body 3 to the seat back supporting part 10, the posture limiting unit 2 comprises a limiting gear piece 201 and a limiting locking piece 202, the limiting gear piece 201 is matched with the length of the sliding groove 101, a plurality of adjusting gears are arranged on the limiting gear piece 201 along the length direction, the limiting locking piece 202 can be matched with any gear of the limiting gear piece 201 to limit the seat back body 3 to the seat back supporting part 10, four gears are arranged in the drawing, the limiting gear piece 201 is arranged on the seat back supporting part 10, the limiting locking piece 202 is arranged on the seat back body 3, when the posture limiting unit 2 is in a locking state, the limiting locking piece 202 is matched with a certain gear of the limiting gear piece 201 to limit the seat back body 3 to the seat back supporting part 10, when the posture limiting unit 2 is in an unlocking state, the limiting locking piece 202 is separated from the limiting gear piece 201, and the seat back body 3 can be adjusted in position relative to the seat back supporting part 10.
The chair back body 3 comprises a chair back lifting frame 301, a chair back upper frame 302 matched with the back of a human body and a chair back lower frame 303 matched with the waist of the human body, wherein the chair back upper frame 302 is assembled above the chair back lower frame 303, the chair back upper frame 302 is fixedly connected with the chair back lifting frame 301, and the chair back lower frame 303 is rotatably connected with the chair back lifting frame 301 through a rotary adjusting unit 4; the seatback lifter 301 is movably connected to the seatback support member 10 by a lifter adjustment unit 1, and the seatback lifter 301 is restrained to the seatback support member 10 by a posture restricting unit 2.
The rotation adjusting unit 4 includes a rotation elastic support 401, the lower back frame 303 keeps the upward position through the rotation elastic support 401 when no external force acts, the lower back frame 303 can elastically deform the rotation elastic support 401 under the action of external force, and drive the lower back frame 303 to rotate and adjust between the upward position and the downward position.
The rotation adjusting unit 4 further comprises a hinge assembly 402, the lower chair back frame 303 and the lifting chair back frame 301 are rotatably connected through the hinge assembly 402, the rotation elastic supporting piece 401 is a torsion spring, the torsion spring is sleeved on a rotation pin 403 of the hinge assembly 402, and two legs of the torsion spring respectively act on the lower chair back frame 303 and the lifting chair back frame 301, so that the lower chair back frame 303 keeps a leaning position relative to the lifting chair back frame 301 when no external force acts. For example, when the user leans against the seatback main body 3, pressure is generated on the torsion spring, and when the pressure is greater than the elastic force of the torsion spring, the seatback lower frame 303 rotates to the depression position relative to the seatback lifting frame 301, so that the lumbar of the user is attached, and the comfort of the lumbar of the user is ensured.
The gear of the gear limiting piece 201 is a limiting block 2021 matched with the gear limiting locking piece 202, and the four limiting blocks 2021 are arranged along the length direction of the gear limiting piece 201; the limiting locking piece 202 is provided with a clamping part 2022 with a U-shaped structure; the gesture limiting unit 2 further comprises a regulating and controlling assembly 203, when the gesture limiting unit 2 is in a locking state, the limiting and locking piece 202 can extend into the limiting and controlling gear 201 under the action of the regulating and controlling assembly 203, the clamping portions 2022 are clamped on the upper side and the lower side of the limiting block 2021, the movement of the chair back body 3 relative to the chair back supporting component 10 is limited, when the gesture limiting unit 2 is in an unlocking state, the limiting and locking piece 202 can be separated from the limiting and controlling gear 201 under the action of the regulating and controlling assembly 203, and the position of the chair back body 3 relative to the chair back supporting component 10 can be adjusted.
The regulating and controlling component 203 is a circulation track button, the circulation track button comprises a key 2031, a circulation track 2032, a mechanism clamp spring 2033 and a button seat 2034, the circulation track 2032 is arranged on the key 2031, the circulation track 2032 comprises a locking gear and an unlocking gear, one side of the mechanism clamp spring 2033 is limited on the button seat 2034, the other side of the mechanism clamp spring is matched with the circulation track 2032, a spring capable of enabling the key 2031 to be ejected out is arranged between the key 2031 and the button seat 2034, the other side, matched with the limiting block 2021, of the clamping portion 2022 is assembled on the key 2031, and the button seat 2034 is arranged on the chair back lifting frame 301. When the device is used, the key 2031 is pressed, the key 2031 drives the clamping part 2022 to extend into the limiting gear piece 201, one side of the mechanism clamp spring 2033 matched with the circulating track 2032 moves to the locking gear, so that the key 2031 is kept in a pressed state, at the moment, the spring is kept compressed, the clamping part 2022 is clamped on the limiting block 2021, the height of the chair back body 3 is limited, the key 2031 is pressed again, under the action of the spring, one side of the mechanism clamp spring 2033 matched with the circulating track 2032 moves to the unlocking gear, the key 2031 is ejected under the action of the spring, the clamping part 2022 is separated from the limiting block 2021, unlocking is completed, the key 2031 is reciprocated along the circulating track 2032 when the key 2031 is pressed once, and unlocking or locking of the gesture limiting unit 2 is realized.
The lifting adjusting units 1 are arranged on two sides of the gesture limiting unit 2 in pairs, and the sliding chute 101 and the lifting elastic support 103 of the lifting adjusting unit 1 are arranged in parallel with the limiting gear piece 201; the lifting elastic support 103 can elastically deform along the length direction, and two ends of the lifting elastic support 103 in the length direction are respectively connected to the chair back body 3 and the chair back supporting part 10. Ensure the stability of the lifting process of the chair back body 3, the structural design is reasonable, and the space utilization rate is high.
Example 2
An adjustable back chair, which uses the adjustable back chair of the embodiment 1, as shown in fig. 1-11, further comprises a chair seat 5 and a back support 6, wherein the adjustable back chair is rotatably connected with the chair seat 5 through the back support 6.
The seat 5 comprises a seat surface 501 and a base 502, the seat surface 501 is arranged on the base 502 and is in sliding connection with the base 502 through a seat surface adjusting device, a seat elastic support piece is arranged between the seat surface 501 and the base 502, one side of the backrest support 6 is hinged with the backrest support part 10, the other side of the backrest support 6 is hinged with the seat surface 501 through a first connecting support 7, one side of the backrest support part 10 is provided with the backrest body 3, and the other side of the backrest support part is hinged with the backrest support 6. Specifically, when the elastic supporting member of the seat is not stressed, the seat support 5 is in an initial position, when the user leans back, the seat back body 3 is pressed, the upper part of the seat back body 3 slides backwards and the lower part of the seat back body slide forwards along with the seat support 5, so that the leaning angle of the seat back body 3 can be greatly improved, the maximum leaning schedule of the office seat in the market can reach 135 degrees, if the leaning angle is overlarge, the gravity center of the office seat is easy to be unstable, the office seat is easy to roll over, the embodiment can move forwards along with the gravity center of the seat support 5 while the seat back body 3 rotates, the maximum leaning angle of the seat back body 3 can reach 160 degrees under the condition that the seat back body 3 is ensured to be safe, the seat back body 3 moves downwards relative to the seat back supporting member 10, the seat back body 3 is ensured to be always attached to the back of a human body, the back of the human body can not generate displacement relative to the seat back body 3, and meanwhile, the lower frame 303 of the seat back of the human body is always attached to the waist of the human body, and the waist of the human body is effectively supported.
The chair also comprises a second connecting bracket 8 and a third connecting bracket 9, wherein the second connecting bracket 8 and the third connecting bracket 9 are arranged at the lower part of the base 502, two ends of the third connecting bracket 9 are respectively hinged with the chair seat 5 and the second connecting bracket 8, and the third connecting bracket 9 and the first connecting bracket 7 are hinged at two opposite ends of the base 502; the two ends of the backrest bracket 6 are respectively extended with a first cantilever 601 and a second cantilever 602 to form a C-shaped structure, the backrest bracket 6 is hinged with the backrest supporting part 10 through the first cantilever 601 and is hinged with the base 502 through the second cantilever 602, the second connecting bracket 8 is provided with a positioning hole 801 and a waist-shaped hole 802 relative to the other end of the hinged third connecting bracket 9, the second cantilever 602 is rotatably connected with the positioning hole 801 relative to the other end of the connecting base 502 through a first pin shaft and is slidably connected with the waist-shaped hole 802 through a second pin shaft, and the first pin shaft is positioned between the seat 5 and the second pin shaft. When a user leans backwards, the second pin shaft moves in the waist-shaped hole 802, so that the chair back body 3 forms a motion trend of backward leaning rotation, autonomous flexible adjustment is achieved, the comfort level of the user for backward leaning is improved, and secondly, the chair back body 3 is rotatably connected to the seat surface 501 through the first connecting support 7, and when the seat surface 501 moves forwards, the chair back body 3 can be driven to rotate relative to the back of a human body, autonomous flexible adjustment is achieved, and meanwhile, the stability of the chair back body 3 is effectively guaranteed.
The principles and embodiments of the present invention have been described herein with reference to specific examples, which are intended to be merely illustrative of the methods of the present invention and their core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," 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 invention will be understood in specific cases by those of ordinary skill in the art.
Claims (10)
1. An adjustable chair back comprises a chair back body and a chair back supporting part, and is characterized by also comprising a lifting adjusting unit and a posture limiting unit; the lifting adjusting unit comprises a sliding groove, a sliding block and a lifting elastic supporting piece, wherein the sliding groove is formed in the seat back body/seat back supporting piece, the sliding block is arranged in the seat back supporting piece/seat back body, the sliding groove is matched with the sliding block, the lifting elastic supporting piece is arranged between the sliding groove and the sliding block, the lifting adjusting unit enables the seat back body to be kept at the limit high position of the seat back supporting piece through the lifting elastic supporting piece when no external force acts, and the lifting adjusting unit can enable the lifting elastic supporting piece to elastically deform under the action of the external force and drive the seat back body to be adjusted in a displacement mode between the limit high position and the limit low position relative to the seat back supporting piece; the seat back body is limited on the seat back supporting part by the gesture limiting unit, the gesture limiting unit comprises a limiting gear piece and a limiting locking piece, the limiting gear piece is matched with the length of the sliding groove, a plurality of adjusting gears are arranged on the limiting gear piece along the length direction, the limiting locking piece can be matched with any gear of the limiting gear piece to limit the seat back body on the seat back supporting part, the limiting gear piece is arranged on the seat back supporting part/seat back body, the limiting locking piece is arranged on the seat back body/seat back supporting part, when the gesture limiting unit is in a locking state, the limiting locking piece is matched with a certain gear of the limiting gear piece to limit the seat back body on the seat back supporting part, and when the gesture limiting unit is in an unlocking state, the limiting locking piece is separated from the limiting gear piece, and the seat back body can be adjusted relative to the seat back supporting part.
2. The adjustable chair back of claim 1, wherein the chair back body comprises a chair back lifting frame, a chair back upper frame matched with the back of a human body and a chair back lower frame matched with the waist of the human body, the chair back upper frame is assembled above the chair back lower frame, the chair back upper frame is fixedly connected with the chair back lifting frame, and the chair back lower frame is rotatably connected with the chair back lifting frame through a rotary adjusting unit; the chair back lifting frame is movably connected with the chair back supporting component through the lifting adjusting unit, and the chair back lifting frame can be limited on the chair back supporting component through the gesture limiting unit.
3. An adjustable chair back according to claim 2, wherein the rotary adjustment unit comprises a rotary elastic support, the chair back lower frame is kept in a reclined position by the rotary elastic support when no external force acts, and the chair back lower frame can elastically deform the rotary elastic support under the action of the external force and drive the chair back lower frame to rotate and adjust between the reclined position and the depression position.
4. An adjustable chair back as in claim 3, wherein the rotary adjustment unit further comprises a hinge assembly, the lower chair back frame and the lifting chair back frame are rotatably connected by the hinge assembly, the rotary elastic support is a torsion spring, the torsion spring is sleeved on a rotary pin of the hinge assembly, and two legs of the torsion spring respectively act on the lower chair back frame and the lifting chair back frame to enable the lower chair back frame to maintain a leaning position relative to the lifting chair back frame when no external force acts.
5. The adjustable seat back of claim 1, wherein the gear of the defined gear member is a stop block matched with the defined locking member, and the plurality of stop blocks are arranged along the length direction of the defined gear member; the limiting locking piece is provided with a clamping part with a U-shaped structure; the gesture limiting unit further comprises a regulating and controlling component, when the gesture limiting unit is in a locking state, the limiting locking piece can extend into the limiting gear piece under the action of the regulating and controlling component, the clamping part is clamped on the upper side and the lower side of the limiting block, the movement of the chair back body relative to the chair back supporting component is limited, when the gesture limiting unit is in an unlocking state, the limiting locking piece can be separated from the limiting gear piece under the action of the regulating and controlling component, and the position of the chair back body can be adjusted relative to the chair back supporting component.
6. The adjustable chair back of claim 5, wherein the control assembly is a circulation track button, the circulation track button comprises a key, a circulation track, a mechanism clamp spring and a button seat, the circulation track is arranged on the key, the circulation track comprises a locking gear and an unlocking gear, one side of the mechanism clamp spring is limited on the button seat, the other side of the mechanism clamp spring is matched with the circulation track, a spring capable of enabling the key to be ejected is arranged between the key and the button seat, the other side of the clamping part matched with the limiting block is assembled on the key, and the button seat is arranged on the chair back lifting frame.
7. The adjustable chair back of claim 1, wherein the pair of lifting adjustment units are respectively arranged at two sides of the gesture limiting unit, and the sliding chute and the lifting elastic support of the lifting adjustment unit are arranged in parallel with the limiting gear; the lifting elastic support piece can elastically deform along the length direction, and two ends of the lifting elastic support piece in the length direction are respectively connected with the chair back body and the chair back supporting part.
8. An adjustable back chair, wherein the adjustable back chair of any one of claims 1-7 is used, further comprising a seat and a back support, wherein the adjustable back chair is rotatably connected to the seat by the back support.
9. The adjustable back seat of claim 8, wherein the seat comprises a seat surface and a base, the seat surface is arranged on the base and is slidably connected with the base through a seat surface adjusting device, a seat elastic support is arranged between the seat surface and the base, one side of the backrest support is hinged with the backrest support part, the other side of the backrest support is hinged with the seat surface through a first connecting support, one side of the backrest support part is provided with the seat back body, and the other side of the backrest support part is hinged with the backrest support.
10. The adjustable back seat of claim 9, further comprising a second connecting bracket and a third connecting bracket, wherein the second connecting bracket and the third connecting bracket are both arranged on the base, two ends of the third connecting bracket are respectively hinged with the seat and the second connecting bracket, and the third connecting bracket and the first connecting bracket are hinged at two opposite ends of the base; the two ends of the backrest support are respectively extended with a first cantilever and a second cantilever to form a C-shaped structure, the backrest support is hinged with the backrest support part through the first cantilever and is hinged with the base through the second cantilever, the second connecting support is provided with a positioning hole and a waist-shaped hole relative to the other end of the hinged third connecting support, the second cantilever is rotatably connected with the positioning hole relative to the other end of the connecting base through a first pin shaft and is slidably connected with the waist-shaped hole through a second pin shaft, and the first pin shaft is positioned between the chair seat and the second pin shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311585616.5A CN117617695A (en) | 2023-11-24 | 2023-11-24 | Adjustable chair back and chair with adjustable chair back |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311585616.5A CN117617695A (en) | 2023-11-24 | 2023-11-24 | Adjustable chair back and chair with adjustable chair back |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117617695A true CN117617695A (en) | 2024-03-01 |
Family
ID=90024636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311585616.5A Pending CN117617695A (en) | 2023-11-24 | 2023-11-24 | Adjustable chair back and chair with adjustable chair back |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117617695A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120130771A (en) * | 2025-03-24 | 2025-06-13 | 乐捷家居股份有限公司 | A reclining chair |
-
2023
- 2023-11-24 CN CN202311585616.5A patent/CN117617695A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120130771A (en) * | 2025-03-24 | 2025-06-13 | 乐捷家居股份有限公司 | A reclining chair |
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