CN114869094A - Chair back and chair - Google Patents

Abstract

The invention discloses a chair back and a chair, which comprise a chair back component, a waist rest arranged in the chair back component and a handheld supporting plate exposed out of the rear end of the chair back component; the chair back component is coated with chair back covering cloth; the inside of the chair back component is provided with an accommodating cavity, the waist rest is arranged in the accommodating cavity, and the waist rest is pushed against the front side part of the chair back covering cloth in front to play a waist pushing role; a notch is arranged at the rear side part of the chair back covering cloth; a longitudinal adjusting sliding plate is connected between the handheld supporting plate and the waist rest, the adjusting sliding plate penetrates upwards into the accommodating cavity from the gap, and the upper end of the adjusting sliding plate is connected with the waist rest; the part of the adjusting sliding plate exposed out of the chair back covering cloth is attached to the back side part of the chair back covering cloth; the bottom of the adjusting sliding plate is connected with the handheld supporting plate, and the adjusting sliding plate acts on the handheld supporting plate to move up and down so as to drive the waist rest to move synchronously; and the handheld supporting plate is attached to the rear side part of the chair back covering cloth, and the handheld supporting plate can always cover the gap and the part of the adjusting sliding plate exposed out of the chair back covering cloth.

Description

Chair back and chair

Technical Field

The invention relates to the field of seats, in particular to a seat back and a seat.

Background

In modern life, office furniture is more and more in variety and more in variety, and users have higher and higher requirements for the functions of the office furniture, wherein the comfort of office chairs plays a key role in the health of office users.

The office chair is a seat with a backrest and armrests, the backrest on the seat is generally vertical or inclined, when a user leans the back against the backrest, a certain gap exists between the waist of the user's back and the backrest, and the back of the human body cannot completely lean against the backrest, so that the supporting effect of the backrest on the back of the human body is reduced, and the use comfort of the human body is reduced. In order to improve the riding comfort, a convex cushion part, namely a waist rest, is generally arranged at the position of the chair back close to the waist of the rider; the lumbar support supports the waist of the occupant to reduce the fatigue of the waist. And the current waist is by all basically having the lift adjustment function, can have more the user's demand to carry out height control.

The chinese utility model patent of cn201921150190.x discloses "an office chair with adjustable waist rest". The chair comprises a chair seat and a backrest, wherein the backrest comprises a fixed plate and a waist rest, the middle part of the fixed plate is provided with an opening, two surfaces of the fixed plate are respectively provided with an elastic cushion and a supporting piece vertical to the chair seat, the supporting piece is provided with a vertical guide part, one end of the waist rest is arranged on the guide part in a sliding mode through a connecting piece, and the other end of the waist rest penetrates through the opening to abut against the elastic cushion; the guide part is a strip-shaped through hole, and the end part of the connecting piece penetrates through the strip-shaped through hole to form an adjusting part; the solid part of the supporting piece is provided with a sliding chute parallel to the guide part, and a sliding block is arranged in the sliding chute; the adjusting part is provided with a connecting block parallel to the sliding block, and the connecting block is connected with the sliding block through an elastic piece. The utility model discloses a waist is by can be along with the difference of user's mode of taking, and upper and lower, front and back regulation wantonly for the waist is by supporting user's waist all the time, and the practicality is strong. Meanwhile, the adjustable hydraulic cylinder has the characteristics of simple structure, convenience in processing, flexibility and accuracy in adjustment and long service life. The structure is a common waist rest adjusting structure on the existing office chair; the backrest is provided with a longitudinal guide part, and the guide part is provided with a longitudinal sliding groove; the waist rest is arranged on the guide part in a sliding way; the waist rest lifting adjusting structure can realize the lifting adjustment of the waist rest. But has a problem in that the lumbar support coupling structure is entirely exposed at the rear end of the backrest; one is that the structure of the guide part is more abrupt, and the sliding groove is longitudinally exposed at the rear end of the backrest, so that the structure is not simple and beautiful; interfering with the structural modeling of the backrest.

The utility model of CN202020574266.8 relates to a swivel chair. It has solved the little scheduling problem of prior art application scope. This swivel chair is including the seat support of taking bracket mechanism, and connect the chair foot at seat support bottom surface center, rear side at the seat support is connected with the back subassembly, the back subassembly includes fixed support frame and fixes the back frame on fixed support frame, the horizontal middle part at the back frame in top of fixed support frame, be equipped with the waist that is located the back frame at the top of fixed support frame and lean on, it is equipped with T shape waist frame and be equipped with the position control mechanism who is used for adjusting T shape waist and leans on the vertical high position of frame to be close to human surface at the top of fixed support frame, waist is leaned on and T shape waist leans on the frame front and back interval distribution, back frame top is connected with the headrest support through lift control mechanism, the top that supports at the headrest is connected with the headrest frame through rotating control mechanism. The utility model has the advantages that: the application range is expanded. The chair lumbar support can also be adjusted, but obviously the lumbar support is connected on the supporting frame in a sliding way through a longitudinal lumbar support frame; and the waist rest frame can be obviously exposed in the lifting adjustment process of the waist rest, so that the attractive structure is influenced.

Aiming at the problems, the invention aims to design a simple and attractive chair back which can realize a concealed design of a waist rest.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a chair back and a chair; the waist support is arranged in the chair back component, the handheld supporting plate is arranged at the rear end of the chair back component, and the handheld supporting plate and the chair back component are connected through a longitudinal adjusting sliding plate; thereby controlling the lifting adjustment of the waist rest by acting on the handheld supporting plate; moreover, the chair back component is coated with chair back covering cloth, and only one notch for inserting the adjusting sliding plate is exposed at the rear side of the chair back covering cloth, so that the structural shape of the chair back component is not influenced; and the handheld supporting plate can just cover the gap and the adjusting sliding plate after being connected, so that the handheld supporting plate attached to the surface of the backrest component can only be seen when the rear end of the backrest component looks, the structure is very simple and attractive, and the design is ingenious.

The technical scheme of the invention is realized as follows:

a chair back comprises a chair back component, a waist rest arranged in the chair back component and a handheld supporting plate exposed out of the rear end of the chair back component; the outer surface of the chair back component is coated with chair back covering cloth, and the chair back covering cloth comprises a front side part positioned in front of the chair back component and a rear side part positioned at the back of the chair back component; the inside of the chair back component is provided with an accommodating cavity, the waist rest is arranged in the accommodating cavity, and the waist rest is pushed against the front side part of the chair back covering cloth in front to play a waist pushing role; a notch is arranged at the rear side part of the chair back covering cloth; a longitudinal adjusting sliding plate is connected between the handheld supporting plate and the waist rest, the adjusting sliding plate upwards penetrates into the accommodating cavity from the gap, and the upper end of the adjusting sliding plate is connected with the waist rest; the part of the adjusting sliding plate exposed out of the chair back covering cloth is attached to the back side part of the chair back covering cloth; the bottom of the adjusting sliding plate is connected with the handheld supporting plate, acts on the handheld supporting plate to move up and down, and can drive the waist rest to move synchronously so as to adjust the waist supporting position of the waist rest on the front side part of the seat back covering cloth; and the handheld supporting plate is attached to the rear side part of the chair back covering cloth, and the handheld supporting plate can always cover the gap and the part of the adjusting sliding plate exposed out of the chair back covering cloth.

Preferably, the bottom end of the handheld supporting plate is positioned below the bottom end of the adjusting sliding plate; acting the hand-held platform to move up and down along the chair back component to enable the waist rest to have an upper adjusting position and a lower adjusting position; and the waist is leaned on the lower adjusting position, and the upper end of the handheld supporting plate is positioned above the notch. The handheld supporting plate is configured to be of sufficient height, so that the handheld supporting plate can always cover the part of the adjusting sliding plate exposed out of the seat back covering cloth and the socket in the process of sliding up and down along the seat back assembly, and the rear end structure of the seat back assembly is attractive.

Preferably, the accommodating cavity is formed in the back face of the chair back component, and a cover plate used for covering the accommodating cavity is correspondingly connected to the rear end of the chair back component; the cover plate is provided with a vertically downward socket corresponding to the position of the notch, and the socket is communicated with the accommodating cavity; the adjusting sliding plate is inserted into the socket from the gap. The accommodating cavity is formed in the back face of the chair back component, so that waist support installation is facilitated; the cover plate can shield the waist rest and the accommodating cavity, so that the hidden installation of the waist rest is realized; the cover plate is correspondingly provided with a socket, so that the adjusting sliding plate can be just inserted into the socket from the position of the notch on the covering cloth of the chair back.

Preferably, the contour of the cover plate is matched with that of the accommodating cavity; the cover plate comprises a cover plate upper part and a cover plate lower part; the rear end surface of the upper part of the cover plate protrudes backwards from the rear end surface of the lower part of the cover plate; a flange is formed between the upper portion and the lower portion of the cover plate, and the insertion opening is provided at a middle position of the flange. A flange is formed between the upper part and the lower part of the cover plate, so that the socket can be just arranged on the flange; the handheld supporting plate is connected to the lower position of the cover plate, and the lower part of the cover plate is designed to be lighter and thinner; therefore, the hand-held supporting plate can be attached to the chair back component more, and the gap is eliminated.

Preferably, the cover plate is wrapped in the seat back covering cloth, and the rear end face of the upper portion of the cover plate is flush with the rear end face of the seat back assembly. After the chair back covering cloth is coated on the chair back component, the rear side part of the chair back covering cloth is not uneven, the surface of the chair back covering cloth is flat, the structural integrity is good, and the structure is attractive.

Preferably, the waist rest is in sliding fit with the cover plate; the upper end of the waist rest is provided with a sliding installation seat which is used for being connected with the adjusting sliding plate; two ends of the sliding installation seat are respectively provided with a sliding block, and two sides of the front end of the cover plate are correspondingly provided with longitudinal sliding chutes; the sliding block is in sliding fit in the sliding groove. The sliding installation seat can be connected with the adjusting sliding plate, so that the adjusting sliding plate can drive the waist rest to move; the sliding installation seat can be in sliding fit with the cover plate, so that the waist rest is in sliding fit with the cover plate; the cover plate can cover the accommodating cavity and can further slide to support the waist rest; plays multiple roles.

Preferably, a sliding seat is arranged at the lower end of the waist rest, and a longitudinal sliding rail is correspondingly arranged at the middle position of the lower part of the front end of the cover plate; the sliding seat is in sliding fit with the sliding rail, so that the sliding seat can slide up and down along the sliding rail. The upper end and the lower end of the waist rest are in sliding fit with the cover plate, so that the waist rest slides more stably.

Preferably, a gear adjusting mechanism is further arranged between the adjusting sliding plate and the cover plate; the gear adjusting mechanism comprises positioning clamping grooves which are respectively arranged on the left side and the right side of the adjusting sliding plate and are arranged at intervals along the vertical direction, and elastic clamping rings which are correspondingly arranged on the cover plate and are positioned on the left side and the right side of the adjusting sliding plate and can be connected with the positioning clamping grooves in a clamped mode. The cover plate can be elastically clamped with the adjusting sliding plate; the utility model has the advantages of make the effect adjust the slide lift occasionally good damping feel, and elasticity rand and positioning slot joint for the waist is by stopping at a plurality of regulation gears.

Preferably, the lower end of the adjusting sliding plate is provided with a connecting block extending backwards, and the bottom of the handheld supporting plate is correspondingly provided with a connecting sleeve extending forwards; the connecting sleeve and the connecting block are inserted in front and back to enable the handheld supporting plate to be attached to the adjusting sliding plate in front and back, and the handheld supporting plate is fixedly connected with the connecting block through screws. The handheld supporting plate is tightly connected with the adjusting sliding plate; the handheld supporting plate is further connected with the adjusting sliding plate; further, the adjusting sliding plate is hidden between the hand-held supporting plate and the chair back component; and the connecting block is inserted in the connecting outer sleeve, so that the connecting position is beautiful.

Preferably, a decorative rear cover is arranged outside the handheld supporting plate. Connecting traces such as screws can be further hidden, so that the surface of the handheld supporting plate is smooth; and (5) beautifying the appearance.

Preferably, the seat back assembly comprises a seat back frame and a seat back sponge body; the chair back frame is of a metal frame structure, and the chair back sponge body and the chair back frame are integrally foamed and molded; the containing cavity is formed at the rear end of the backrest sponge body. The back of the chair frame can be in the foaming formation of mould the back cavernosum for the back cavernosum can directly be formed into the shape that the rear end has the holding chamber, need not to process in addition and sets up the holding chamber, and it is more convenient to process the preparation.

Preferably, the lumbar support is pressed forward against a back sponge at a front end thereof. So that the user can feel the waist-supporting function when leaning on the chair back component.

Preferably, the chair back frame comprises an upper horizontal connecting cross rod and a lower horizontal connecting cross rod which are respectively exposed out of the upper end and the lower end of the accommodating cavity; the upper and lower connecting rails are configured to be connected with the cover plate, respectively. The cover plate is connected with the metal chair back frame, so that the connection strength is ensured.

Preferably, the upper end of the cover plate is provided with a supporting clamping seat in a hook shape; the upper connecting cross rod is a round rod, and the bearing clamping seat can be vertically clamped and matched with the upper connecting cross rod; and the bearing clamping seat can rotate around the upper connecting cross rod. Therefore, the cover plate can be directly clamped with the upper connecting cross rod from bottom to top during installation, and then the cover plate is further rotated; the connection is convenient and quick.

Preferably, the bottom of the cover plate is provided with a fixing plate, and the fixing plate is connected with the lower connecting cross rod through screws.

Preferably, the accommodating cavity is formed in the middle of the chair back component in the height direction of the chair back, the accommodating cavity is communicated with the chair back component in the front and back direction, and the accommodating cavity is formed between the front side part of the chair back fabric and the rear side part of the chair back fabric. As another embodiment, a part is hollowed out in the front and back of the middle part of the chair back component, the accommodating cavity is surrounded after the chair back cover cloth is sleeved, the adjusting slide plate extends into the notch, the adjusting slide plate can be introduced into the accommodating cavity and then is connected with the waist rest, and the waist rest can be directly propped against the front side part of the chair back cover cloth.

Preferably, the chair back covering cloth is made of opaque textile cloth or leather. The waist rest has a hidden effect, and brings a novel feeling to the user.

Preferably, only one notch is arranged, and the width of the notch is 1.5CM-4 CM. The sliding plate can be adjusted to be inserted and slid, and meanwhile, the gap is made as small as possible, so that the appearance is not influenced as much as possible; the covering cloth of the chair back is as complete as possible.

Preferably, the notch is arranged at the middle position in the width direction of the chair back, and the notch is arranged at the position from one third to one half of the height of the back side part of the chair back cover from bottom to top. The notch is arranged at the middle of the chair back covering cloth or at the position lower than the middle of the chair back covering cloth, so that the position requirement of waist support adjustment is met.

A seat comprises the seat back.

The design starting point, the idea and the beneficial effects of the invention adopting the technical scheme are as follows:

firstly, in the chair back, the waist rest is arranged in the chair back component, the handheld supporting plate is arranged at the rear end of the chair back component, and the handheld supporting plate and the chair back component are connected through the longitudinal adjusting sliding plate; therefore, the waist support is controlled to be lifted and adjusted by acting on the handheld supporting plate, and the concealed installation of the waist support is realized; moreover, the chair back cover cloth is coated outside the chair back component, and only one notch for inserting the adjusting sliding plate is exposed at the rear side of the chair back cover cloth, so that the appearance can be attractive, and the structural shape of the chair back component is not influenced; the gap and the adjusting sliding plate can be just covered after the handheld supporting plate is connected, so that the handheld supporting plate attached to the surface of the backrest component can be seen only when the rear end of the backrest component looks, the structure is very simple and attractive, and the design is ingenious; in addition, the adjusting sliding plate and the gap are not exposed in the process of moving the handheld supporting plate; compared with the prior chair back lumbar support with the structure of the sliding groove or the connecting structure exposed outside, the appearance of the chair back component is simpler and more advanced.

Secondly, an accommodating cavity is arranged at the rear end of the chair back component, and the waist rest is arranged in the accommodating cavity; the holding cavity is arranged on the back of the chair back component, so that the waist support is convenient to mount. Then the rear end of the chair back component is correspondingly connected with a cover plate used for covering the containing cavity, and the cover plate can shield the waist support and the containing cavity to realize the hidden installation of the waist support; and the cover plate is provided with a socket corresponding to the position of the notch, and the socket is communicated with the accommodating cavity, so that the adjusting sliding plate can be inserted into the socket from the notch of the chair back covering cloth.

Furthermore, the waist rest is in sliding fit with the cover plate, and a gear adjusting mechanism for realizing elastic adjustment of the waist rest is further arranged between the adjusting sliding plate and the cover plate. Thereby make the apron can enough cover the holding chamber can also slide to the waist and support, play multiple effect.

Furthermore, the chair back component comprises a chair back frame and a chair back sponge body; the chair back frame is of a metal frame structure, and the chair back sponge body and the chair back frame are integrally foamed and molded; the containing cavity is formed at the rear end of the backrest sponge body. The back of the chair frame can be in the foaming formation of mould the back cavernosum for the back cavernosum can directly be formed into the shape that the rear end has the holding chamber, need not to process in addition and sets up the holding chamber, and it is more convenient to process the preparation.

Drawings

FIG. 1 is a perspective view of a back end of a seat back assembly of embodiment 1;

FIG. 2 is a schematic side perspective view of a seat back assembly according to an embodiment 1 of the present invention;

FIG. 3 is a schematic perspective view of a seat back assembly according to embodiment 1 of the present invention with the insert exposed;

FIG. 4 is a schematic perspective view of the embodiment 1 of the present invention in which the adjusting slide plate is engaged with the cover plate and the cover plate is connected to the seat back assembly;

FIG. 5 is a perspective view of an adjustment slide shown exposed from a seat back assembly in accordance with embodiment 1 of the present invention;

FIG. 6 is a schematic perspective view of the connection of the cover plate and the hand-held platform to the seat back assembly according to embodiment 1 of the present invention;

FIG. 7 is a schematic view showing a connection structure of a seat back assembly, a lumbar support, a cover plate and a hand-held support plate according to the present invention in embodiment 1;

fig. 8 is a perspective view of a seatback frame according to example 1 of the present invention;

fig. 9 is a schematic perspective view of a waist rest, a cover plate and a hand-held supporting plate in embodiment 1 of the present invention.

FIG. 10 is a schematic perspective view of a shift position adjusting mechanism according to embodiment 1 of the present invention;

FIG. 11 is a schematic perspective view of the elastic collar and the adjustment slide plate of the present invention in embodiment 1;

FIG. 12 is a schematic perspective view of the connection between the lumbar support and the adjustment slide plate in embodiment 1 of the present invention;

FIG. 13 is a schematic perspective view showing the connection between the hand-held support plate and the adjustment slide plate in embodiment 1 of the present invention;

fig. 14 is a schematic perspective view of the sliding fit between the lumbar support and the cover plate in embodiment 1 of the present invention;

fig. 15 is a schematic perspective view of a chair back assembly and a chair back cover according to embodiment 1 of the present invention;

FIG. 16 is a side sectional view of a chair back assembly in accordance with embodiment 1 of the present invention;

fig. 17 is a schematic perspective view of the handheld blade of embodiment 1 of the present invention in an upper adjustment position and a lower adjustment position.

The figures are numbered: a seat back assembly 1; a seatback frame 1A; a backrest sponge 1B; a waist support 2; a decorative rear cover 3; an accommodating cavity 4; adjusting the sliding plate 5; a positioning clamp groove 5 a; a hand-held pallet 6; a socket 7; a cover plate 8; a cover plate upper portion 8 a; a cover plate lower portion 8 b; a side lever 9; an upper connecting rail 10 a; a lower connecting rail 10 b; supporting the card holder 11; a fixed plate 12; a connecting portion 13; a flange 14; a slide mount 15; a chute 16; a slider 17; a slide 18; a slide rail 19; an elastic collar 20; a connecting base 21; a caulking groove 22; a connecting column 23; a retainer plate 24; a chair back cover 25; the front side portion 25 a; the rear side portion 25 b; a notch 25 c; a connecting block 26; a connecting sleeve 27.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more than one unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The specific embodiment of the invention is as follows:

example 1: as shown in fig. 1 to 17, the present invention provides a chair back and a chair, wherein the chair back comprises a chair back component 1, a lumbar support 2 arranged in the chair back component 1, and a handheld supporting plate 6 exposed at the rear end of the chair back component 1. The outer surface of the chair back component 1 is coated with chair back covering cloth 25, and the chair back covering cloth 25 comprises a front side part 25a positioned in front of the chair back component 1 and a rear side part 25b positioned at the back of the chair back component 1; an accommodating cavity 4 is arranged in the chair back component 1, the waist support 2 is arranged in the accommodating cavity 4, and the front part of the waist support 2 pushes against the front side part 25a of the chair back covering cloth 25 to play a role of pushing against the waist; a notch 25c is arranged at the rear part 25b of the chair back covering cloth 25; a longitudinal adjusting sliding plate 5 is connected between the handheld supporting plate 6 and the waist rest 2; the adjusting sliding plate 5 penetrates into the accommodating cavity 4 upwards from the gap 25c, and the upper end of the adjusting sliding plate 5 is configured to be connected with the waist rest 2; and the part of the adjusting slide 5 exposed out of the back cover 25 is abutted against the rear part 25b of the back cover 25 in the longitudinal direction. The handheld supporting plate 6 is exposed at the rear end of the chair back component 1, the handheld supporting plate 6 is connected to the bottom of the adjusting sliding plate 5, and the handheld supporting plate 6 acts on the vertical movement of the handheld supporting plate 6 to drive the waist rest 2 to move synchronously so as to adjust the waist supporting position of the waist rest 2 at the front side part 25a of the chair back covering cloth 25; the hand rest 6 is similarly attached to the rear portion 25b of the back cover 25, and the hand rest 6 can always cover the notch 25c and the portion of the adjustment slide plate 5 exposed to the outside of the back cover 25.

Then, in the chair back, the waist rest 2 is arranged in the chair back component 1 to realize hidden installation, the handheld supporting plate 6 is arranged at the rear end of the chair back component 1, and the waist rest 2 is connected with the handheld supporting plate 6 through the longitudinal adjusting sliding plate 5; thereby controlling the lifting adjustment of the lumbar support 2 by acting on the handheld supporting plate 6; moreover, the chair back component 1 is coated with the chair back covering cloth 25, and only one notch 25c for inserting the adjusting sliding plate 5 is exposed at the rear side part 25b of the chair back covering cloth 25, so that the structure is simple and attractive; the socket 7 and the adjusting sliding plate 5 can be covered all the time after the handheld supporting plate 6 is connected, so that only the handheld supporting plate 6 attached to the surface of the backrest assembly 1 can be seen from the rear end of the backrest assembly, and the backrest assembly is ingenious in structural design and rich in high-grade feeling.

As shown in fig. 3-8 and 15-17, the accommodating cavity 4 is opened at the back of the seat back assembly 1, specifically: the chair back assembly 1 comprises a chair back frame 1A and a backrest sponge body 1B; the chair back frame 1A is of a metal frame structure, and the backrest sponge body 1B and the chair back frame 1A are integrally foamed and molded; the containing cavity 4 is formed on the rear end face of the backrest sponge body 1B. The backrest sponge body 1B can be formed by foaming the backrest frame 1A in a mold, so that the backrest sponge body 1B can be directly molded into a shape with the containing cavity 4 at the rear end, the containing cavity 4 does not need to be additionally machined, and the processing and the manufacturing are more convenient; furthermore, the size of the space of the accommodating cavity 4 is larger than that of the waist rest 2; so that the waist rest 2 can still move up and down and be adjusted in the accommodating cavity 4. The lumbar support 2 is pushed forward to act on the backrest sponge 1B at the front end thereof, and can be pushed forward to act on the front portion 25a of the backrest cover 25; the user is ensured to lean against the chair back component 1, and the waist support 2 can play a waist supporting role; the waist support 2 is arranged in the accommodating cavity 4, so that the waist support 2 is installed in a hidden manner; the whole structure of the chair back component 1 is simpler and more beautiful.

And, the rear end of back of the chair subassembly 1 corresponds and is connected with the apron 8 that is used for covering holding chamber 4, and the profile size of apron 8 is identical with the profile size of holding chamber 4 to can cover holding chamber 4, make back of the chair subassembly 1 surface texture level and smooth. Specifically, the method comprises the following steps: the chair back frame 1A comprises side rods 9 respectively positioned at two sides, an upper connecting cross rod 10a and a lower connecting cross rod 10b which are respectively connected between the two side rods 9 are arranged at the middle position of the chair back frame 1A, and the upper connecting cross rod 10a and the lower connecting cross rod 10b are vertically spaced. As shown in fig. 6-8, after the backrest sponge 1B and the backrest frame 1A are integrally foamed, the upper connecting rail 10a is just exposed at the upper end of the accommodating cavity 4, and the lower connecting rail 10B is just exposed at the lower end of the accommodating cavity 4. The upper connecting cross rod 10a and the lower connecting cross rod 10b are respectively configured to be connected with the cover plate 8, and the upper connecting cross rod 10a and the lower connecting cross rod 10b can not only increase the structural strength of the chair back frame 1A, but also just expose out of the accommodating cavity 4 to connect the cover plate 8; achieves two purposes at one stroke and has ingenious design. Further, the following steps are carried out: as shown in fig. 7, the upper end of the cover plate 8 is provided with supporting clamping seats 11 horizontally arranged at intervals, the supporting clamping seats 11 are in a hook shape, and the supporting clamping seats 11 extend forwards and upwards; the bearing clamping seat 11 can be upwards clamped and matched with the upper connecting cross rod 10 a; then can be directly with apron 8 from up and be connected horizontal pole 10a joint on with down during the installation, simple to operate is swift. Moreover, the upper connecting cross rod 10a is a metal round pipe, and after the upper connecting cross rod 10a is clamped with the bearing clamping seat 11, the bearing clamping seat 11 can also rotate around the upper connecting cross rod 10 a; therefore, after the upper end of the cover plate 8 is clamped with the upper connecting cross rod 10a, the lower end of the cover plate 8 can further rotate forwards, so that the lower end of the cover plate 8 is further connected with the lower connecting cross rod 10 b. A fixing plate 12 protruding downwards is further arranged in the middle of the lower end of the cover plate 8; the lower connecting cross rod 10b is a metal cross rod, the middle part of the lower connecting cross rod 10b is exposed out of the lower end of the accommodating cavity 4 to form a connecting part 13, and the fixing plate 12 and the connecting part 13 are fixedly connected through screws. The lower connecting cross rod 10b only has the connecting part 13 exposed outside the accommodating cavity 4, so that the exposed part of the lower connecting cross rod 10b is less, the connecting function is realized, and the appearance is beautified. After the fixing plate 12 is connected with the connecting part 13 through screws, the cover plate 8 is mounted, and the operation is very convenient and fast. After the cover plate 8 is connected, the accommodating cavity 4 can be shielded; and the cover plate 8 is connected with the chair back frame 1A, so that the connection strength is ensured.

As shown in fig. 4-7, the cover plate 8 is further provided with a vertically downward insertion opening 7 corresponding to the position of the notch 25c, and the insertion opening 7 is communicated with the accommodating cavity 4; the cover plate 8 is correspondingly provided with a socket 7, so that the adjusting sliding plate 5 can be inserted into the socket 7 from the position of a notch 25c on the seat back covering cloth 25. Specifically, the method comprises the following steps: the cover plate 8 comprises a cover plate upper part 8a and a cover plate lower part 8 b; wherein the rear end surface of the upper cover plate part 8a protrudes backwards from the rear end surface of the lower cover plate part 8 b; so that a flange 14 is formed between the cover upper part 8a and the cover lower part 8b, said socket 7 being able to be arranged at an intermediate position of this flange 14. The cover plate 8 is wrapped in the chair back covering cloth 25, and the rear end face of the upper part 8a of the cover plate is flush with the rear end face of the chair back component 1; after the chair back covering cloth 25 is coated on the chair back component 1, the back side part 25b of the chair back covering cloth 25 is not uneven, so that the surface of the chair back covering cloth 25 is flat, the structural integrity is good, and the structure is attractive. The adjusting sliding plate 5 can penetrate into the inserting opening 7 from bottom to top and is connected and matched with the lumbar support 2. Then, the adjusting sliding plate 5 can move up and down along the inserting opening 7 without arranging an exposed sliding groove. After the handheld supporting plate 6 is connected, the handheld supporting plate 6 is positioned at the position of the lower cover plate part 8b, and the lower cover plate part 8b is designed to be thinner and lighter; therefore, the handheld supporting plate 6 can be attached to the chair back component 1 more, and the gap is eliminated.

As shown in fig. 6-16, the upper end of the lumbar support 2 is provided with a sliding mounting seat 15, and the sliding mounting seat 15 is configured to be fixed with the upper end of the adjusting sliding plate 5 by a screw connection, so that the adjusting sliding plate 5 can move up and down to act on the movement of the lumbar support 2. As shown in fig. 9-11, longitudinal sliding grooves 16 are respectively formed at two sides of the adjusting sliding plate 5 at the upper end of the front end of the cover plate 8, and two ends of the corresponding sliding mounting seat 15 are respectively provided with outwardly protruding sliding blocks 17; the sliding installation seat 15 can be used for being connected with the adjusting sliding plate 5, and the sliding blocks 17 on two sides of the sliding installation plate 15 can also be in sliding fit in the sliding grooves 16; the waist rest 2 can stably slide along the cover plate 8 in the vertical direction, and the sliding adjustment is smoother and more stable. Furthermore, as shown in fig. 14, a sliding seat 18 is further provided at the middle position of the lower end of the lumbar support 2, and a "T" shaped sliding groove is provided in the sliding seat 18; a longitudinal T-shaped sliding rail 19 is correspondingly arranged in the middle of the front end of the cover plate 8; the sliding seat 18 is in sliding fit with the sliding rail 19, so that the sliding seat 18 can slide up and down along the sliding rail 19; then the lower end of the waist rest 2 is also in sliding fit with the cover plate 8; thereby make the relative apron 8 that the waist was leaned on 2 can be stable slide from top to bottom, make the waist lean on 2 can not take place about the skew, slide smoothly stably, the sliding adjustment effect is better. The cover plate 8 can cover the accommodating cavity 4 and can also support the waist rest 2 in a sliding manner; has double functions.

In addition, a gear adjusting mechanism is arranged between the cover plate 8 and the adjusting sliding plate 5, and the gear adjusting mechanism comprises positioning clamping grooves 5a which are respectively arranged on the left side and the right side of the adjusting sliding plate 5 and are arranged at intervals along the vertical direction; and elastic clamping rings 20 which are correspondingly arranged on the cover plate 8 and are positioned at the left side and the right side of the adjusting sliding plate 5 and can be clamped with the positioning clamping grooves 5 a. The elastic retainer ring 20 is a circular rubber ring, the connecting seats 21 respectively positioned at two sides of the adjusting sliding plate 5 are arranged at the middle position of the front end surface of the cover plate 8, the adjusting sliding plate 5 is clamped between the two connecting seats 21, and the left and right deflection of the adjusting sliding plate 5 can be limited, so that the adjusting sliding plate 5 can move stably. A caulking groove 22 for the elastic clamping ring 20 to be embedded and a connecting column 23 positioned at the center of the caulking groove 22 are arranged on the connecting seat 21; the elastic retainer ring 20 is directly sleeved on the connecting column 23 and is embedded in the caulking groove 22; and after the elastic collar 20 is embedded in the embedding groove 22, the side of the elastic collar 20 close to the adjusting sliding plate 5 is contacted with the adjusting sliding plate 5. And the front ends of the two connecting seats 21 are further connected with a limiting plate 24, two sides of the limiting plate 24 are respectively connected to the connecting seats 21 through screws, and the limiting plate 24 can limit the elastic retainer ring 20 to be separated from the connecting seats 21. The positioning clamping grooves 5a are arc-shaped grooves, and the positioning clamping grooves 5a are longitudinally arranged at intervals on two sides of the adjusting sliding plate 5; when the adjusting sliding plate 5 slides up and down relative to the cover plate 8, the elastic clamping rings 20 acting on two sides can be simultaneously extruded to elastically deform, so that the adjusting sliding plate 5 has good damping feeling in the sliding process; and when the adjusting sliding plate 5 is in a free state, the elastic clamping rings 20 on the two sides are respectively clamped with the positioning clamping grooves 5a on the two sides of the adjusting sliding plate 5, so that the adjusting sliding plate 5 stays at any adjusting position. The structure design is ingenious, and a locking or unlocking device is not required to be additionally arranged; the sliding of the adjusting sliding plate 5 or the stopping of the adjusting sliding plate 5 can be controlled at any time by utilizing the elastic deformation of the elastic clamping ring 20, thereby conveniently adjusting the height of the waist rest 2.

As shown in fig. 1-7, the lumbar support 2, the adjustment slide 5 and the cover 8 are assembled in advance, and then the cover 8 is attached to the seat back assembly 1. The chair back covering cloth 25 is attached to the outer surface of the chair back component 1, and the chair back covering cloth 25 covers the chair back component 1 and the cover plate 8; the notch 25c of the back part 25b of the chair back covering cloth 25 can just coincide with the socket 7 on the cover plate 8; as shown in fig. 3 and 5, after the seat back covering cloth 25 is covered on the seat back assembly 1, only the notch 25c of the back side portion 25b of the seat back covering cloth 25a is exposed, so that the structure is very simple and beautiful. Accordingly, the bottom of the adjustment slide 5 is exposed to the outside of the seat back cover 25, and the portion of the adjustment slide 5 exposed to the outside of the seat back cover 25 is in contact with the rear portion 25b of the seat back cover 25 a. A connecting block 26 extending backwards is arranged at the bottom of the adjusting sliding plate 5, a connecting sleeve 27 extending forwards is correspondingly arranged at the bottom of the front end of the handheld supporting plate 6, and when the handheld supporting plate is connected, the connecting block 26 is in front-back insertion fit with the connecting sleeve 27, so that the handheld supporting plate 6 and the adjusting sliding plate 5 are close to each other in front-back manner; then, the screw is arranged on the hand-held supporting plate 6 and the connecting block 26 from back to front in a penetrating way, so that the hand-held supporting plate and the connecting block are fixedly connected. After the connection is finished, the rear end of the handheld supporting plate 6 is also connected with a decorative rear cover 3, so that connection traces such as screws can be further hidden, and the surface of the handheld supporting plate 6 is smooth; and (5) beautifying the appearance.

After the handheld supporting plate 6 is connected, two ends of the handheld supporting plate 6 are encircled at the rear end of the chair back component 1, and the handheld supporting plate 6 is attached to the rear side part 25b of the chair back covering cloth 25; so that the chair back component 1, the adjusting slide plate 5 and the handheld splint 6 are mutually attached to each other from front to back; the adjustment sled 5 will then be hidden between the back cover 25 and the hand-held platform 6. In addition, the bottom end of the handheld supporting plate 6 is positioned below the bottom end of the adjusting sliding plate 5, so that the bottom end of the adjusting sliding plate 5 is not exposed outside all the time; as shown in fig. 17, and the action hand-held platform 6 moves up and down along the back assembly 1 such that the lumbar support 2 has an upper adjustment position and a lower adjustment position; the waist rest 2 is positioned at the lower adjusting position, and the handheld supporting plate 6 is positioned at the lowest adjusting position; the upper end of the hand-held blade 6 is still above the notch 25 c. Then, the handheld supporting plate 6 is configured to have a sufficient height, so that the handheld supporting plate 6 can always cover the part of the adjusting sliding plate 5 exposed out of the seat back covering cloth 25 and the notch 25c in the process that the handheld supporting plate 6 slides up and down along the seat back assembly 1, and the rear end structure of the seat back assembly 1 is attractive.

As shown in fig. 1-3 and 15-17, the notch 25c is provided at a middle position in the width direction of the backrest, and the notch 25c is provided at a height position from one third to one half of the height of the rear side portion 25b of the backrest cover 25. The notch 25c is arranged at the position in the middle of the chair back covering cloth 25 or at the lower part of the middle of the chair back covering cloth, so that the position requirement of waist support adjustment is met. Only one notch 25c is arranged, and the width of the notch 25c is 1.5-4 CM; the gap 25c is made as small as possible while the adjustment sliding plate 5 is inserted and slid, so that the appearance is not influenced as much as possible; the back covering cloth 25 is as complete as possible. The chair back covering cloth 25 is made of opaque textile cloth or leather; has good texture, and the waist rest has a hiding effect, thereby bringing a novel feeling to a user.

Such that the lumbar support 2 is disposed within the back assembly 1 and the hand-held platform 5 is disposed outside of the back assembly 1, as shown in figures 1-2. Only the hand-held supporting plate 6 is exposed out of the rear end of the chair back component 1; when the waist support 2 is controlled to lift, only the handheld supporting plate 6 needs to be acted for lifting, the handheld supporting plate 6 drives the adjusting sliding plate 5 to lift, so that the lifting adjustment of the waist support 2 is realized, and the operation is very convenient; in the process of adjusting the handheld supporting plate 6 up and down, only the handheld supporting plate 6 is exposed out of the rear end of the chair back component 1 all the time, and the adjusting sliding plate 5 and the notch 25c are not exposed all the time; the use is more advanced. The structure of the chair back component 1 is novel and simple, the self shape of the chair back component 1 can not be interfered, and the structure is beautiful.

Example 2: this embodiment is different from embodiment 1 in that: along the height direction of the chair back, the accommodating cavity 4 is formed in the middle position of the chair back component 1, the accommodating cavity 4 is penetrated through the chair back component 1 (not shown) from front to back, and the accommodating cavity 4 is formed between the front side part 25a and the rear side part 25b of the chair back fabric. As another embodiment, a part is hollowed out in the front and back of the middle part of the chair back component 1 to form an accommodating cavity 4, after the chair back cover cloth 25 is sleeved, the front and back ends of the accommodating cavity 4 can be just surrounded, after the adjusting slide plate 5 extends into the notch 25c, the adjusting slide plate can be introduced into the accommodating cavity 4 and then connected with the lumbar support 2, and the lumbar support 2 can directly abut against the front part 25a of the chair back cover cloth; the structure is very simple. The positioning of the lumbar support 2 can be realized by the method in embodiment 1, and other structures can also be adopted, which is not the focus of this embodiment and is not described herein again.

Claims (20)

1. A chair back, characterized in that: comprises a chair back component, a waist rest arranged in the chair back component and a hand-held supporting plate exposed out of the rear end of the chair back component; the outer surface of the chair back component is coated with chair back covering cloth, and the chair back covering cloth comprises a front side part positioned in front of the chair back component and a rear side part positioned at the back of the chair back component; the inside of the chair back component is provided with an accommodating cavity, the waist rest is arranged in the accommodating cavity, and the waist rest is pushed against the front side part of the chair back covering cloth in front to play a waist pushing role; a notch is arranged at the rear side part of the chair back covering cloth; a longitudinal adjusting sliding plate is connected between the handheld supporting plate and the waist rest, the adjusting sliding plate upwards penetrates into the accommodating cavity from the gap, and the upper end of the adjusting sliding plate is connected with the waist rest; the part of the adjusting sliding plate exposed out of the chair back covering cloth is attached to the back side part of the chair back covering cloth; the bottom of the adjusting sliding plate is connected with the handheld supporting plate, acts on the handheld supporting plate to move up and down, and can drive the waist rest to move synchronously so as to adjust the waist supporting position of the waist rest on the front side part of the seat back covering cloth; and the handheld supporting plate is attached to the rear side part of the chair back covering cloth, and the handheld supporting plate can always cover the gap and the part of the adjusting sliding plate exposed out of the chair back covering cloth.

2. The chair back of claim 1, wherein: the bottom end of the handheld supporting plate is positioned below the bottom end of the adjusting sliding plate; acting the hand-held platform to move up and down along the chair back component to enable the waist rest to have an upper adjusting position and a lower adjusting position; and the waist is leaned on the lower adjusting position, and the upper end of the handheld supporting plate is positioned above the notch.

3. The chair back of claim 1, wherein: the containing cavity is formed in the back face of the chair back component, and a cover plate used for covering the containing cavity is correspondingly connected to the rear end of the chair back component; the cover plate is provided with a vertically downward inserting hole corresponding to the position of the notch, and the inserting hole is communicated with the accommodating cavity; the adjusting sliding plate is inserted into the socket from the gap.

4. The chair back of claim 3, wherein: the contour of the cover plate is matched with that of the accommodating cavity; the cover plate comprises a cover plate upper part and a cover plate lower part; the rear end surface of the upper part of the cover plate protrudes backwards from the rear end surface of the lower part of the cover plate; a flange is formed between the upper portion and the lower portion of the cover plate, and the insertion opening is provided at a middle position of the flange.

5. The chair back of claim 4, wherein: the cover plate is wrapped in the chair back covering cloth, and the rear end face of the upper portion of the cover plate is flush with the rear end face of the chair back component.

6. The chair back of claim 3, wherein: the waist rest is in sliding fit with the cover plate; the upper end of the waist rest is provided with a sliding installation seat which is used for being connected with the adjusting sliding plate; two ends of the sliding installation seat are respectively provided with a sliding block, and two sides of the front end of the cover plate are correspondingly provided with longitudinal sliding chutes; the sliding block is in sliding fit in the sliding groove.

7. The chair back of claim 6, wherein: a sliding seat is arranged at the lower end of the waist rest, and a longitudinal sliding rail is correspondingly arranged at the middle position of the lower part of the front end of the cover plate; the sliding seat is in sliding fit with the sliding rail, so that the sliding seat can slide up and down along the sliding rail.

8. The chair back of claim 3, wherein: a gear adjusting mechanism is also arranged between the adjusting sliding plate and the cover plate; the gear adjusting mechanism comprises positioning clamping grooves which are respectively arranged on the left side and the right side of the adjusting sliding plate and are arranged at intervals along the vertical direction, and elastic clamping rings which are correspondingly arranged on the cover plate and are positioned on the left side and the right side of the adjusting sliding plate and can be connected with the positioning clamping grooves in a clamped mode.

9. A chair back according to claim 1 or 3, wherein: the lower end of the adjusting sliding plate is provided with a connecting block extending backwards, and the bottom of the handheld supporting plate is correspondingly provided with a connecting sleeve extending forwards; the connecting sleeve and the connecting block are inserted in front and back to enable the handheld supporting plate to be attached to the adjusting sliding plate in front and back, and the handheld supporting plate is fixedly connected with the connecting block through screws.

10. The chair back of claim 9, wherein: a decorative rear cover is arranged outside the handheld supporting plate.

11. The chair back of claim 3, wherein: the chair back assembly comprises a chair back frame and a backrest sponge body; the chair back frame is of a metal frame structure, and the chair back sponge body and the chair back frame are integrally foamed and molded; the containing cavity is formed at the rear end of the backrest sponge body.

12. The chair back of claim 11, wherein: the waist rest extrudes forwards to act on the back sponge body positioned at the front end of the waist rest.

13. The chair back assembly of claim 11, wherein: the chair back frame comprises an upper horizontal connecting cross rod and a lower horizontal connecting cross rod which are respectively exposed out of the upper end and the lower end of the accommodating cavity; the upper and lower connecting rails are configured to be connected with the cover plate, respectively.

14. The chair back assembly of claim 13, wherein: the upper end of the cover plate is provided with a bearing clamping seat in a hook shape; the upper connecting cross rod is a round rod, and the bearing clamping seat can be vertically clamped and matched with the upper connecting cross rod; and the bearing clamping seat can rotate around the upper connecting cross rod.

15. The chair back assembly of claim 13, wherein: the bottom of apron is equipped with the fixed plate, and this fixed plate adopts screwed connection with lower horizontal pole of connecting.

16. The chair back of claim 1, wherein: along the direction of the height of the chair back, the holding cavity is formed in the middle of the chair back component, the holding cavity is communicated with the chair back component from front to back, and the holding cavity is formed between the front side part of the chair back fabric and the rear side part of the chair back fabric.

17. The chair back of claim 1, wherein: the chair back covering cloth is made of opaque textile cloth or leather.

18. The chair back of claim 1, wherein: the width of the notch is 1.5-4 CM.

19. A chair back according to claim 1 or 17, wherein: the notch is arranged at the middle position of the chair back in the width direction, and the notch is arranged at the position from one third to one half of the height of the rear side part of the chair back covering cloth from bottom to top.

20. A seat, characterized by: comprising a chair back according to any one of claims 1 to 19.

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