CN215533019U - Backrest adjusting mechanism and seat backrest - Google Patents
Backrest adjusting mechanism and seat backrest Download PDFInfo
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- CN215533019U CN215533019U CN202120661345.7U CN202120661345U CN215533019U CN 215533019 U CN215533019 U CN 215533019U CN 202120661345 U CN202120661345 U CN 202120661345U CN 215533019 U CN215533019 U CN 215533019U
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- headrest
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- backrest
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- 230000007246 mechanism Effects 0.000 title claims abstract description 40
- 238000009434 installation Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 208000008035 Back Pain Diseases 0.000 description 1
- 206010053156 Musculoskeletal discomfort Diseases 0.000 description 1
- 208000019804 backache Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
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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—Support for the head or the back
- A47C7/38—Support for the head or the back for the head
-
- 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—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
- A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
- A47C7/462—Support 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
The utility model discloses a backrest adjusting mechanism and a seat backrest, which comprise a fixing piece, a headrest assembly and a waist supporting assembly; the fixing piece is used for being connected with the backrest frame, the headrest assembly is rotatably connected with the fixing piece through a rotating shaft, and the distance from the axis of the rotating shaft to the top of the backrest frame is greater than the distance from the axis of the rotating shaft to the bottom of the backrest frame; the installation cross rod is connected with the top waist component, and the top waist component is used for extending or contracting in the direction vertical to the installation cross rod. This application back adjustment mechanism structure is compacter, can increase headrest subassembly motion space, increases the length of headrest board, when making back adjustment mechanism adjust the support to head and waist, protection cervical vertebra and lumbar vertebrae that can be better improve the comfort level.
Description
Technical Field
The utility model belongs to the technical field of seats, and particularly relates to a backrest adjusting mechanism and a seat backrest.
Background
The seat back is used for supporting and relaxing the head and the back of a human body when the seat is in a sitting position, and is helpful for relieving the soreness and backache caused by over-stretching of the lumbar muscles when the seat is in a sitting position.
Some functional furniture such as sofa chairs in the prior art have waist and head adjusting functions at the same time, but due to structural limitation, discomfort of neck and lumbar is easily caused during angle adjustment, the head and the lumbar cannot be completely relaxed, and the use comfort of customers is affected.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that the backrest adjusting mechanism in the prior art has limited adjusting space of a headrest assembly due to large occupied space of the waist supporting assembly, so that the length of a headrest plate is small, neck discomfort is easily caused during angle adjustment, and the lumbar part cannot be attached and loosened.
In order to achieve the purpose, the utility model provides a backrest adjusting mechanism, which comprises a fixing piece, a headrest assembly, a waist supporting assembly and a mounting cross rod;
the fixing piece is used for being connected with the backrest frame, the headrest assembly is rotatably connected with the fixing piece through a rotating shaft, and the distance from the axis of the rotating shaft to the top of the backrest frame is greater than the distance from the axis of the rotating shaft to the bottom of the backrest frame;
the installation cross rod is connected with the top waist component, and the top waist component is used for extending or contracting in the direction vertical to the installation cross rod.
Furthermore, the number of the fixing pieces is two, and the two fixing pieces are symmetrically arranged on two inner side frames of the backrest frame;
the fixing piece is provided with a mounting point, and the distance from the mounting point to the top of the backrest frame is greater than the distance from the mounting point to the bottom of the backrest frame.
Further, the headrest assembly comprises a rotation limiting member, a headrest mounting member and a driving cross bar;
the utility model discloses a headrest mounting piece, including the mounting piece, rotatory locating part, drive horizontal pole, rotatory locating part one end through the pivot with the mounting piece rotates to be connected, the other end of rotatory locating part with the headrest mounting piece rotates to be connected, the both ends of drive horizontal pole respectively with two rotatory locating part is connected, the drive horizontal pole is used for driving two in step rotatory locating part rotates for the mounting piece.
Further, the headrest assembly further comprises an elastic member;
the both ends of elastic component are connected rotatory locating part and headrest installed part respectively, the elastic component is used for making headrest installed part with rotatory locating part's promotion portion keeps contact.
Further, the headrest assembly further comprises a headrest driving piece, one end of the headrest driving piece is connected with the driving cross rod, and the other end of the headrest driving piece is connected with the mounting cross rod.
Further, the waist-supporting component comprises a transmission mechanism and a waist-supporting plate, wherein the transmission mechanism is used for driving the waist-supporting plate to extend or contract in the direction vertical to the installation cross rod.
Furthermore, the top waist assembly also comprises a top waist driving piece, and the transmission mechanism comprises a top waist fixing piece and a shear type telescopic piece;
the top waist fixing piece is connected with the installation cross rod, one end of the shear type telescopic piece is connected with the top waist fixing piece and the top waist driving piece, and the other end of the shear type telescopic piece is connected with the top waist plate.
Further, the scissor type telescopic piece comprises a first connecting piece and a second connecting piece which are connected in a cross mode;
one end of the first connecting piece is rotatably connected with the waist ejecting driving piece, and the other end of the first connecting piece is slidably connected with the waist ejecting plate through a first rotating fastener;
one end of the second connecting piece is rotatably connected with a waist pushing rod of the waist pushing driving piece, the other end of the second connecting piece is rotatably connected with the waist pushing plate, and one end of the second connecting piece, which is connected with the waist pushing rod, is slidably connected with the waist pushing fixing piece through a second rotating fastener.
Further, the driving direction of the waist-pushing driving piece and the driving direction of the headrest driving piece are perpendicular to each other.
The utility model also provides a seat backrest, which comprises a backrest frame, a headrest plate and the backrest adjusting mechanism;
the backrest adjusting mechanism is fixed on the inner side frame of the backrest frame through the fixing piece, and the headrest plate is fixedly connected with the headrest mounting piece.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the backrest adjusting mechanism is more compact in structure, the mounting points of the fixing pieces are positioned at the middle lower part of the backrest frame, the movement space of the headrest assembly can be increased, the length of the headrest plate is increased, the head and the shoulder and back can be simultaneously pushed through the headrest plate during head adjustment, the cervical vertebra curvature can be kept, and neck stretching caused by only pushing the head is avoided. The waist supporting component is a flat-pushing type waist supporting component which can be extended or contracted in the direction vertical to the backrest frame, the structure is compact, the waist supporting plate can be better attached to the lumbar, the pressure of intervertebral discs is reduced, the excessive stretching of lumbar muscles is avoided, the relaxation of the lumbar muscles is ensured, and the waist is protected. When this application back adjustment mechanism adjusts head and waist and supports, protection cervical vertebra and lumbar vertebrae that can be better improve the comfort level.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical means in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a backrest adjustment mechanism according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of a headrest assembly and a fixing member according to an embodiment of the utility model;
FIG. 3 is a schematic view of a portion of a headrest assembly and a fixing member according to an embodiment of the utility model;
FIG. 4 is a schematic structural diagram of a waist-supporting member according to an embodiment of the present invention;
FIG. 5 is a schematic view of the waist-top assembly in an extended state according to an embodiment of the present invention;
FIG. 6 is a schematic view of the construction of the seat back of the present invention;
fig. 7 is a front elevational view of the seat back of the present invention.
In the figure: 10-backrest frame, 1-fixing piece, 11-mounting point, 2-headrest assembly, 21-rotation limiting piece, 211-pushing part, 212-rotating shaft, 22-headrest mounting piece, 221-connecting surface, 222-mounting surface, 223-extension plate, 23-driving cross bar, 24-elastic piece, 25-headrest driving piece, 3-waist-pushing assembly, 30-transmission mechanism, 31-waist-pushing fixing piece, 311-second sliding groove, 32-scissor type telescopic piece, 321-first connecting piece, 322-second connecting piece, 323-first rotation fastening piece, 324-second rotation fastening piece, 33-waist-pushing plate, 331-plate surface, 332-fixing plate, 333-first sliding groove, 34-waist-pushing driving piece, 341-waist-pushing push rod, 4-installing a cross bar and 5-arranging a headrest plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any 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 addition, in the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly, e.g., as being 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.
Examples
As shown in fig. 1 to 5, the embodiment of the present invention provides a backrest adjusting mechanism, which includes a fixing member 1, a headrest assembly 2, a lumbar support assembly 3, and a mounting cross bar 4; the fixing piece 1 is used for being connected with a backrest frame 10, the headrest assembly 2 is rotatably connected with the fixing piece 1 through a rotating shaft 212, and the distance from the axis of the rotating shaft 212 to the top of the backrest frame 10 is larger than the distance from the axis of the rotating shaft to the bottom of the backrest frame 10;
the mounting cross rod 4 is connected with the top waist component 3, and the top waist component 3 is used for extending or contracting in a direction vertical to the mounting cross rod 4.
Specifically, the number of the fixing parts 1 is two, the two fixing parts 1 are symmetrically arranged on two inner side frames of the backrest frame 10, the fixing parts 1 are provided with mounting points 11, and the distance from the mounting points 11 to the top of the backrest frame 10 is greater than the distance from the mounting points 11 to the bottom of the backrest frame 10. Specifically, the fixing member 1 is fixedly connected to the back frame 1 by a fastener such as a rivet, a screw, a bolt, or the like. The fixing member 1 is disposed at a position lower than the middle of the back frame 10 so that the distance of the headrest assembly 2 from the top of the back frame 10 is increased and the space of the headrest assembly 2 is increased, and thus the length of the headrest plate 5 in the present embodiment can be longer than that of a general model. In this embodiment, the lower end of the fixed member 1 is connected to the mounting rail 4. In some embodiments, the fixing member 1 may also be installed separately from the installation cross bar 4, and both ends of the installation cross bar 4 are respectively fixed on the backrest frames at both sides.
Specifically, the headrest assembly 2 includes a rotation limiting member 21, a headrest mounting member 22 and a driving cross rod 23, one end of the rotation limiting member 21 is rotatably connected to the mounting member 1 through a rotating shaft 212, the other end of the rotation limiting member 21 is rotatably connected to the headrest mounting member 22, two ends of the driving cross rod 23 are respectively connected to the rotation limiting member 21, and the driving cross rod 23 is used for synchronously driving the rotation limiting member 21 to rotate relative to the mounting member 1.
Specifically, in this embodiment, the headrest assembly 2 further includes a rotating shaft 212, the rotation limiting member 21 is rotatably connected to the fixing member 1 through the rotating shaft 212, a distance from an axis of the rotating shaft 212 to the top of the backrest frame 10 is greater than a distance from the axis of the rotating shaft 212 to the bottom of the backrest frame 10, and an axis of the rotating shaft 212 is located at a middle-lower portion of the backrest frame 10.
In the embodiment of the present invention, the headrest mounting member 22 includes a connection surface 221 and a mounting surface 222 that are integrally bent, the mounting surface 222 is fixedly connected to the headrest plate 5, and the connection surface 221 is provided with a connection point connected to the rotation limiting member 21 and is rotatably connected to the rotation limiting member 21 through a rotation fastener. In other embodiments, the headrest mounting member 22 may also be rotatably connected to the fixing member 1, and the headrest mounting member 22 is also rotated by the rotation limiting member 21. In this embodiment, an extension plate 223 is attached to the mounting surface 222 to be connected to the headrest plate 5. In some embodiments, the mounting surface 222 may be configured according to the length of the headrest plate 5 to which it is attached, with the length of the headrest plate 5 increasing and the length of the mounting surface 222 increasing.
Specifically, the rotation limiting member 21 is provided with a pushing portion 211, the pushing portion 211 contacts with the headrest mounting member 22, and the headrest mounting member 22 is configured to rotate under the pushing of the rotation limiting member 21. Specifically, the pushing portion 211 is a portion where the rotation limiting member 21 contacts the headrest mounting member 22, and may be surface contact or point contact.
Specifically, the headrest assembly 2 further includes an elastic member 24, two ends of the elastic member 24 are respectively connected to the rotation limiting member 21 and the headrest mounting member 22, and the elastic member 24 is configured to maintain the headrest mounting member 22 in contact with the pushing portion 211 of the rotation limiting member 21. Specifically, in the present embodiment, one end of the connection surface 221 of the headrest mounting member 22 is provided with a first connection portion for connection with the elastic member 24, and the rotation limiting member 21 is provided with a second connection portion for connection with the other end of the elastic member 24. In the present embodiment, the first connecting portion and the second connecting portion are both mounting holes, and the elastic member 24 is connected to the mounting holes by the hooks at the two ends thereof, so that the elastic member 24 is detachably mounted between the headrest mounting member 22 and the rotation limiting member 21.
Specifically, a limiting structure is further disposed between the fixing member 1 and the rotation limiting member 21, and the limiting structure is used for limiting the rotation angle of the rotation limiting member 21, that is, limiting the adjustable angle of the headrest plate 5.
Specifically, the headrest assembly 2 further comprises a headrest driving member 25, one end of the headrest driving member 25 is connected to the driving cross bar 23, and the other end of the headrest driving member 25 is connected to the mounting cross bar 4. The headrest driving member 25 is used for pushing the driving cross rod 23 to drive the rotation limiting member 21 and the headrest mounting member 22 to rotate. In the present embodiment, the headrest driving member 25 includes a headrest motor and a headrest push rod, wherein the headrest push rod is rotatably connected to the driving rail 23 through a connecting member, and the housing of the headrest motor is connected to the mounting rail 4 through a connecting member. Preferably, the position of the headrest driving member 25 is set in the middle of the driving rail 23 and the mounting rail 4, so that both ends of the headrest plate 5 are balanced by the thrust, and the pushing process is stable and more comfortable.
Specifically, the waist-supporting assembly 3 includes a transmission mechanism 30 and a waist-supporting plate 33, and the transmission mechanism 30 is configured to drive the waist-supporting plate 33 to extend or retract in a direction perpendicular to the mounting rail 4.
Specifically, the top waist assembly 3 further comprises a top waist driving member 34, and the transmission mechanism 30 comprises a top waist fixing member 31 and a scissor type telescopic member 32; the top waist fixing piece 31 is connected with the installation cross rod 4, one end of the scissors type telescopic piece 32 is connected with the top waist fixing piece 31 and the top waist driving piece 34, and the other end of the scissors type telescopic piece 32 is connected with the top waist plate 33.
Specifically, the scissor type telescopic element 32 comprises a first connecting element 321 and a second connecting element 322 which are connected in a cross manner, one end of the first connecting element 321 is rotatably connected with the top waist driving element 34, and the other end of the first connecting element 321 is slidably connected with the top waist plate 33 through a first rotating fastener 323; one end of the second connecting piece 322 is rotatably connected with the waist pushing rod 341 of the waist pushing driving piece 34, the second connecting piece 322 is rotated or displaced by the pushing of the waist pushing rod, the other end of the second connecting piece 322 is rotatably connected with the waist pushing plate 33, and the end of the second connecting piece 322 connected with the waist pushing rod 341 is also slidably connected with the waist pushing fixing piece 31 through a second rotating fastener 324. In the present application, when the first connecting member 321 is driven by the lumbar driving member 34, the second connecting member 322 is passively operated.
Specifically, the top waist panel 33 includes a panel 331 and a fastening plate 332 secured to a lower surface of the panel 331, and the scissor jack 32 is pivotally coupled to the fastening plate 332 to move the top waist panel 33 between a fully retracted position and a fully extended position. A first sliding groove 333 for the top of the first connecting member 321 and the first rotating fastener 323 to horizontally slide is arranged at one end of the fixing plate 332 connected with the first connecting member 321; a second rotating fastener 324 is arranged at one end of the second connecting piece 322 connected with the waist pushing rod 341, and a second sliding groove 311 for the second rotating fastener 324 to horizontally slide is arranged on the fixing piece 1 opposite to the second rotating fastener 324; as first rotary fastener 323 moves horizontally along first slide channel 333, second rotary fastener 324 is displaced synchronously along second slide channel 311. The rotary fasteners herein may be provided in a variety of forms, including rivets, such as spin rivets, and other fasteners known in the art for providing a rotary connection.
Specifically, the driving direction of the lumbar drive member 34 and the driving direction of the headrest drive member 25 are perpendicular to each other.
In this embodiment, the driving direction of the headrest driving member 25 is perpendicular to the mounting rail 4, the headrest driving member 25 pushes the driving rail 23 to drive the rotation limiting member 21 to rotate relative to the fixing member 1, and the rotation limiting member 21 pushes the headrest mounting member 22 and the headrest plate 5 to rotate and unfold, so as to adjust the angle of the headrest plate 5. When headrest driving piece 25 drive headrest board 5 resets, the push rod of headrest driving piece 25 is withdrawed, drive headrest installed part 22 and headrest board 5 through elastic component 24 and retrieve, because the effect of elastic component 24, make headrest board 5's recovery power reduce, consequently under the condition of headrest board 5 centre gripping hand or object, the clamping force can reduce greatly, and can pull open headrest board 5 easily through elastic component 24, can enlarge the clearance between headrest board 5 and back frame 1 and take out the barrier, thereby play the effect of preventing pressing from both sides.
In this embodiment, the top waist driving member 34 is driven in a direction parallel to the mounting rail 4, and the top waist driving member 34 drives the scissor jack 32, thereby extending or retracting the top waist plate 33 in a direction perpendicular to the mounting rail 4. The flat-pushing type of top lumbar plate 33 perpendicular to installation horizontal pole 4 extends can be better with the laminating of lumbar vertebrae portion, and top lumbar plate 33 can directly support lumbar vertebrae portion, plays the effect of waist pillow, reduces intervertebral disc pressure, protects the waist, improves seat comfort level. The face 331 of the top waist panel 33 may be, but is not limited to, an arc design, which may better fit the waist line, increasing the comfort of the lumbar support.
This application back adjustment mechanism adopts perpendicular to installation horizontal pole 4 mode of extending because of pushing up waist subassembly 3, and the structure is compacter, make the displacement space of pushing up waist subassembly 3 reduce, mounting 1 is closer to the bottom of back frame 10 in the mounted position of back frame 10, make headrest subassembly 2's regulation space bigger, headrest board 5's length and promotion area increase, make headrest board 5 can promote head and shoulder back simultaneously, help keeping cervical vertebra portion curvature, avoid the neck overstretching. When this application back adjustment mechanism adjusts head and waist and supports, protection cervical vertebra and lumbar vertebrae that can be better improve the comfort level.
The present embodiment further provides a seat back, as shown in fig. 6 to 7, including a back frame 10, a headrest plate 5 and the backrest adjusting mechanism, wherein the backrest adjusting mechanism is fixed on an inner side frame of the back frame 10 through the fixing member 1, and the headrest plate 5 is fixedly connected with the headrest mounting member 22.
The seat backrest of the embodiment can control the headrest driving piece and the waist supporting driving piece by arranging the remote control switch or the electric control button to adjust the rotation angle of the headrest plate 5 and the extension of the waist supporting plate 33, and the seat backrest can be independently adjusted and can also be adjusted simultaneously to meet different requirements of users. The seat back of the application can be applied to furniture components such as sofas, seats and the like, and comprises but is not limited to single-person or multi-person furniture components, sofas and combined furniture components. The side frames of the back frame 10 of the present invention can be narrower than the conventional style, which can reduce the thickness of the back, reduce the occupied space, and improve the aesthetic property of the sofa/seat.
In this embodiment, "top" and "bottom" refer to the orientations that a user takes when using a seat including the backrest adjustment mechanism of the present invention, i.e., the upper end of the backrest frame when the user uses the seat is "top", and the end that is relatively close to the ground with the "top" is "bottom".
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A backrest adjusting mechanism is characterized by comprising a fixing piece (1), a headrest assembly (2), a waist supporting assembly (3) and a mounting cross rod (4);
the fixing piece (1) is used for being connected with a backrest frame (10), the headrest assembly (2) is rotatably connected with the fixing piece (1) through a rotating shaft (212), and the distance from the axis of the rotating shaft (212) to the top of the backrest frame (10) is larger than the distance from the axis of the rotating shaft to the bottom of the backrest frame (10);
the installation cross rod (4) is connected with the top waist component (3), and the top waist component (3) is used for extending or contracting in the direction vertical to the installation cross rod (4).
2. The backrest adjusting mechanism as claimed in claim 1, wherein there are two fixing members (1), and the two fixing members (1) are symmetrically arranged on two inner side frames of the backrest frame (10);
be provided with mounting point (11) on mounting (1), mounting point (11) extremely the distance at back frame (10) top is greater than mounting point (11) extremely the distance of back frame (10) bottom.
3. A backrest adjustment mechanism according to claim 1, characterized in that the headrest assembly (2) comprises a rotation limiter (21), a headrest mounting member (22) and a drive cross bar (23);
rotatory locating part (21) one end through pivot (212) with mounting (1) rotates to be connected, the other end of rotatory locating part (21) with headrest installed part (22) rotates to be connected, the both ends of drive horizontal pole (23) are connected with two respectively rotatory locating part (21), drive horizontal pole (23) are used for the synchronous drive two rotatory locating part (21) for mounting (1) rotates.
4. A backrest adjustment mechanism according to claim 3, characterized in that the headrest assembly (2) further comprises a resilient member (24);
the two ends of the elastic piece (24) are respectively connected with a rotation limiting piece (21) and a headrest mounting piece (22), and the elastic piece (24) is used for keeping the headrest mounting piece (22) in contact with a pushing part (211) of the rotation limiting piece (21).
5. A backrest adjustment mechanism according to claim 3, wherein the headrest assembly (2) further comprises a headrest drive member (25), one end of the headrest drive member (25) being connected to the drive rail (23), the other end of the headrest drive member (25) being connected to the mounting rail (4).
6. A backrest adjustment mechanism according to claim 1, characterized in that the lumbar support assembly (3) comprises a transmission mechanism (30) and a lumbar support plate (33), the transmission mechanism (30) being adapted to move the lumbar support plate (33) to extend or retract in a direction perpendicular to the mounting rail (4).
7. A backrest adjustment mechanism according to claim 6, characterized in that said top waist assembly (3) further comprises a top waist driving member (34), said transmission mechanism (30) comprising a top waist fixing member (31) and a scissor-type telescopic member (32);
the top waist fixing piece (31) is connected with the installation cross rod (4), one end of the scissor type telescopic piece (32) is connected with the top waist fixing piece (31) and the top waist driving piece (34), and the other end of the scissor type telescopic piece (32) is connected with the top waist plate (33).
8. A backrest adjustment mechanism according to claim 7, characterized in that said scissor jack (32) comprises a first (321) and a second (322) cross-linked link;
one end of the first connecting piece (321) is rotatably connected with the waist ejecting driving piece (34), and the other end of the first connecting piece (321) is slidably connected with the waist ejecting plate (33) through a first rotating fastener (323);
second connecting piece (322) one end with top waist push rod (341) of top waist driving piece (34) rotate to be connected, the other end of second connecting piece (322) with top waist board (33) rotate to be connected, second connecting piece (322) with the one end that top waist push rod (341) are connected pass through second rotating fastener (324) with top waist mounting (31) sliding connection.
9. A backrest adjustment mechanism according to claim 8, characterized in that the direction of actuation of the lumbar drive member (34) and the direction of actuation of the headrest drive member (25) are perpendicular to each other.
10. A seat back, characterized by comprising a back frame (10), a headrest plate (5) and a back adjustment mechanism according to any one of claims 1 to 9;
the backrest adjusting mechanism is fixed on an inner side frame of the backrest frame (10) through the fixing piece (1), and the headrest plate (5) is fixedly connected with the headrest mounting piece (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120661345.7U CN215533019U (en) | 2021-03-31 | 2021-03-31 | Backrest adjusting mechanism and seat backrest |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120661345.7U CN215533019U (en) | 2021-03-31 | 2021-03-31 | Backrest adjusting mechanism and seat backrest |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215533019U true CN215533019U (en) | 2022-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120661345.7U Active CN215533019U (en) | 2021-03-31 | 2021-03-31 | Backrest adjusting mechanism and seat backrest |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215533019U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4356789A1 (en) | 2022-10-21 | 2024-04-24 | Remacro Technology Co., Ltd. | Lower-back supporting apparatus, backrest supporting frame and seating unit |
-
2021
- 2021-03-31 CN CN202120661345.7U patent/CN215533019U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4356789A1 (en) | 2022-10-21 | 2024-04-24 | Remacro Technology Co., Ltd. | Lower-back supporting apparatus, backrest supporting frame and seating unit |
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