CN115067702A

CN115067702A - Chair back and seat based on human engineering

Info

Publication number: CN115067702A
Application number: CN202210746019.5A
Authority: CN
Inventors: 王大秋; 周骏
Original assignee: Zhejiang Motostuhl Furniture Technology Co ltd
Current assignee: Zhejiang Motostuhl Furniture Technology Co ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-09-20

Abstract

The invention discloses an ergonomic chair back, which comprises a back bracket, wherein the back bracket is provided with: the upper back assembly comprises two side back units and an elastic block; the back bracket is provided with a support arm; the single support arm is connected to the outer side of the side back unit, and an elastic soft ring is arranged between the support arm and the side back unit; the elastic block is an elastic rubber body, so that the two side back units can elastically contract inwards or expand outwards along the front-back direction; the waist support piece is arranged below the upper back component; the waist support piece has elasticity, the middle position of the waist support piece is arched forwards, and the waist support piece comprises a waist support framework and two side-by-side waist support bodies, so that the waist support piece is easy to elastically deform; the waist support is connected to the waist support, a sliding seat capable of sliding and adjusting up and down is arranged at the lower part of the waist support, and the lower end of the waist support is rotatably connected to the sliding seat; the lumbar support is capable of being elastically deformed in a longitudinal direction in response to the raising and lowering movement of the carriage to change its own degree of forward arching.

Description

Chair back and seat based on human engineering

Technical Field

The invention relates to the field of seats, in particular to an ergonomic chair back and an ergonomic chair seat.

Background

The chair backs of office chairs in the current market are generally of a large integral frame structure (namely, a single-back chair), and have overlarge size and heavier weight. Large injection molding machines are required for production, and the packaging and transportation costs are high. In addition, the single-back seat has disadvantages in that: the spine shape of the user cannot be matched to support the back and the waist of the user in a fitting manner, and targeted support cannot be achieved; the long-term extrusion of the spine of the person sitting on the single-back chair for a long time can not be realized, and the person can not have a rest; or the waist is suspended and loses support, so that the spine can generate pathological changes due to poor sitting posture; therefore, in the prior art, in order to make the seat more comfortable to use, more and more manufacturers have designed various seats with double-back structures and three-back structures; the chairs are provided with a plurality of chair backs for better supporting the back of a human body in a partitioned mode, and a single chair back also has adjusting functions of lifting, transverse moving and the like; chairs of this type of construction are ergonomically designed and are also known as ergonomic chairs.

The ergonomics is essentially to adapt the use of the tool to the natural shape of the human body as much as possible, so that the person using the tool does not need any active adaptation to his or her body and spirit while working, thereby reducing the fatigue caused by the use of the tool as much as possible. Although some existing ergonomic chairs are provided with a plurality of chair backs, the chair backs are usually directly fixed with the support frames, so that the comfort is not high and the chair backs are always in a fixed state; the chair back can not change along with the human body during the process of leaning backwards; the human body can be subjected to the reaction force of the chair back in the process of leaning backwards and cannot be well unfolded; the chair back can only simply play the role of supporting the back. The sitting posture of the person is not fixed, such as forward leaning writing on a desk, head-up reading of the eyes by a webpage and other sitting postures, the back states of the human body are different, and the sitting posture is dynamically changed; some chairs only simply divide the chair back into an upper back and a lower back, but the single upper back and the single lower back cannot be correspondingly deformed by twisting the body of a user, and the use requirements of different sitting postures cannot be met; one side of the user's back is away from the chair back and loses support, and the effect of zone support is not achieved.

Chinese patent of CN201710214545.6 discloses an "ergonomic chair back for an intelligent health chair", which includes a head rest, a back rest and a waist rest respectively disposed on a chair back support, wherein the waist rest includes a left waist rest and a right waist rest laterally disposed in parallel, and a left waist rest adjusting device and a right waist rest adjusting device corresponding thereto, the left waist rest and the right waist rest are respectively fixed on the left waist rest adjusting device and the right waist rest adjusting device, the left waist rest adjusting device and the right waist rest adjusting device are disposed on the chair back support, and the head rest, the back rest, the left waist rest and the right waist rest each have an independent leaning curved surface for users to lean against. The left waist rest adjusting device and the right waist rest adjusting device are self-adaptive elastic devices. The waist rest state can be automatically adjusted according to different body contours and back curve shapes, and the different requirements of different people on comfort and health are met. While correcting for poor sitting posture.

The ergonomic chair back is divided into a back rest piece, a left lumbar rest piece and a right lumbar rest piece; however, the back rest only has a function of supporting the upper back of a human body and cannot be deformed correspondingly by twisting the body of a user, so that one side of the upper back of the user is far away from the chair back when the user actually uses the back rest, and the back rest loses support. While the chair back has a left lumbar support member and a right lumbar support member for supporting the lumbar region of the user; however, as is well known, the spine of a human body is S-shaped, and then the lumbar supports of most of the seats protrude forwards to support the natural bending parts of the lumbar vertebrae so as to play a role in supporting the lumbar vertebrae; the obvious waist-supporting effect of the chair back is not obvious; and the left waist leans on the piece and the right waist leans on the piece and can't all carry out the depth adjustment around going on, because people's size demonstrates the diversified distribution of tall and short fat thin, the waist of fixed position leans on hardly to be adapted to the crowd of different sizes, can't lean on the back to carry out the regulation of depth in order to satisfy the individual difference, and its application scope and health care effect have all received the restriction.

Therefore, the invention aims to design the ergonomic chair back, the curvilinear chair back support conforming to the ergonomics is designed, the back of a user can be supported in a subarea manner, and the front-back depth of the waist of the user can be adjusted; meeting the expectations of people on modern office chairs.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide an ergonomic chair back; the upper back assembly comprises two side back units which are arranged side by side left and right, and the waist support also comprises two side waist support bodies which are arranged side by side left and right; the chair back is of a four-back structure integrally, and can support the back of a user in a partitioning manner; the two side back units of the upper back assembly can elastically contract inwards or expand outwards, so that the upper back of a user can be always attached to match with the dynamic sitting posture change of the user; and the elastic soft ring can also buffer the user, relieve the back of the user and avoid supporting the user. The whole waist support piece is arched forwards to achieve the waist supporting effect and conform to the back ergonomic curve; the waist support piece can also adjust the waist supporting degree according to users with different body types or the requirements of the users; the use is more humanized.

Furthermore, the invention also provides a seat using the chair back.

The technical scheme of the invention is realized as follows:

the utility model provides a back of chair based on ergonomic, includes back support, be equipped with on the back support: the upper back assembly comprises two side back units which are arranged side by side left and right and an elastic block connected between the two side back units; the upper part of the back bracket is provided with support arms which respectively extend towards the left side and the right side and are used for connecting and supporting the side back unit; the single support arm is connected to the outer side of the side back unit, the support arm and the side back unit are connected in a front-back mode, and an elastic soft ring capable of being extruded and deformed is arranged between the support arm and the side back unit; the elastic block is an elastic rubber body with a plate-shaped structure and comprises a main supporting block and side connecting blocks positioned on two sides of the main supporting block; the main supporting block is clamped between the two side back units, and each side back unit is configured to be in plug fit with the side connecting block; the two side back units can elastically contract inwards or expand outwards relative to the back support along the front-back direction; the waist support piece is arranged below the upper back component and protrudes forwards from the upper back component; the waist support piece has elasticity, the middle position of the waist support piece is arched forwards, and the waist support piece comprises a waist support frame which is in a bilateral symmetry frame type structure and two side waist support bodies which are arranged on the waist support frame in a left-right side-by-side mode; the side waist support body is made of flexible materials, the waist support framework has elasticity and is configured to provide elastic support for the side waist support body; the waist support is arranged at the lower part of the back support; the waist support piece is connected to the waist support frame, and the upper end and the lower end of the waist support piece are respectively in rotating fit with the waist support frame; a sliding seat capable of sliding and adjusting up and down along the waist support is arranged at the lower part of the waist support, and the lower end of the waist support is rotatably connected to the sliding seat; the lumbar support is capable of being elastically deformed in a longitudinal direction in response to the raising and lowering movement of the carriage to change its own degree of forward arching.

Preferably, the main supporting block is perpendicular to the side connecting block, and the front end and the rear end of the main supporting block protrude out of the side connecting block; and a mounting socket is arranged at the middle position of the inner side of each side back unit, and the side connecting block is inserted and matched in the mounting socket. Then the two side connecting blocks can respectively elastically bend and deform relative to the main supporting block so as to enable the two side back supporting pieces to retract back and forth and expand outwards; the backrest can be adaptive to fit the back of the human body; and the side connecting blocks are inserted in the mounting sockets, so that the two side back units are tightly connected, and connecting traces are eliminated.

Preferably, the side back unit is a rectangular frame structure, and comprises an inner side rod and an outer side rod which are spaced left and right; the elastic block is connected between the inner side rods of the two side back units; and the mounting socket is arranged at the middle position of the rear end of the inner side rod. The inner side rod and the elastic block are conveniently connected by adopting the insertion fit; and the installation socket is arranged at the rear end of the inner side rod, so that the supporting effect of the front end of the side back unit is not influenced.

Preferably, the middle position of the side connecting block is provided with an interval to form two vertically independent inserting blocks, the inner side of the installation socket is correspondingly provided with two vertically spaced inserting grooves, and the inserting blocks are inserted and matched in the inserting grooves. The side connecting block is further divided into two inserting blocks, so that the elastic deformation effect is better; avoiding the deformation and the labor of a whole structure.

Preferably, a connection rear cover is arranged at the rear end of each installation socket, and the connection rear cover is covered at the rear end of the installation socket and can limit the insertion block from separating from the slot; the insert block is provided with first limiting holes which are longitudinally spaced and first connecting through holes which are distributed on the left side and the right side of the first limiting holes; a second limiting hole which is overlapped with the first limiting hole in front and back and a second connecting through hole which is overlapped with the first connecting through hole in front and back are correspondingly arranged on the rear end surface of the mounting socket; the connecting rear cover is correspondingly provided with a limiting column and a connecting steel buckle, and the limiting column is configured to sequentially penetrate through the second limiting hole and the first limiting hole; the connecting steel buckle is a steel sheet with the periphery extending backwards and arc-shaped inverted teeth distributed on the periphery; the connecting steel buckle is configured to sequentially penetrate through the second connecting through hole and the first connecting through hole so that the arc-shaped inverted teeth are in front-back tooth connection with the insert block. Then the plug block and the mounting socket can be stably inserted and connected through the limiting column; the arc-shaped inverted teeth can elastically contract to a certain degree, and when the connecting steel buckle passes through the second connecting through hole and the first connecting through hole, the arc-shaped inverted teeth can contract towards the center; after the connecting steel buckle completely passes through the first connecting through hole, the arc-shaped inverted teeth elastically reset to be in toothed connection with the front and the back of the insert block, and the side connecting blocks are elastic rubber bodies, so that the arc-shaped inverted teeth can be partially clamped into the side connecting blocks, and the connecting rear cover is limited to be separated from the mounting socket; the connecting back cover is directly buckled on the mounting socket, so that the connection is very convenient; the rear cover can be connected to achieve the decoration effect and can also achieve the connection limiting effect.

Preferably, a support seat extending towards the center direction is arranged on the outer side rod of the side back unit, a connecting seat is arranged at the end part of the support arm, and the connecting seat is in front-back butt joint with the support seat; the elastic soft ring is clamped between the connecting seat and the support; a connecting column extending backwards is arranged at the rear end of the support; the rear end of the connecting seat is provided with an installation groove; the connecting column sequentially penetrates through the elastic soft ring and the connecting seat backwards and is positioned in the mounting groove; a damping rubber ring is also arranged in the mounting groove, and a through hole for the connecting column to pass through is formed in the damping rubber ring; the damping rubber ring is embedded in the mounting groove, the connecting column is arranged in the damping rubber ring in a penetrating mode, and the damping rubber ring is tightly attached to the inner wall of the mounting groove; and the rear end of the connecting column is provided with a gasket and a bolt, and the bolt penetrates through the gasket and is connected into the connecting column. The elastic soft ring and the damping rubber ring can realize 'soft connection' between the connecting seat and the support; the two can move mutually within a certain range, so that the side back unit can be elastically supported; and in the process that the user leans backwards on the chair back component, the elastic soft ring can play an elastic buffering role, the back of the user is relieved, and the support is prevented from being stiff.

Preferably, the end part of the support is provided with a first limiting bulge protruding backwards, and the connecting column is arranged on the first limiting bulge and extends backwards; a first groove capable of being matched with the first limiting bulge is correspondingly arranged at the front end of the elastic soft ring; the front end of the connecting seat is provided with a second limiting bulge protruding forwards; correspondingly, a second groove capable of being matched with the second limiting bulge is formed in the rear end of the elastic soft ring; and a connecting hole which is penetrated through from front to back and used for avoiding the connecting column is arranged on the connecting seat, and the connecting hole is formed at the front end of the second limiting bulge. The first limiting bulge is embedded in the first groove, so that the support and the elastic soft ring can be tightly matched, and the elastic soft ring is prevented from deviating; the second limiting bulge is embedded in the second groove, so that the connecting seat can be tightly matched with the elastic soft ring; the connecting column can conveniently penetrate through the connecting hole; thereby enabling the elastic soft ring to be stably limited between the support and the connecting seat.

Preferably, the elastic soft ring is matched with the support in a clamping manner, one of the elastic soft ring and the support is provided with an arc-shaped clamping groove, and the other one of the elastic soft ring and the support is correspondingly provided with an arc-shaped clamping block; the clamping block is clamped in the clamping groove so that the elastic soft ring is circumferentially fixed with the support. Further avoiding the rotation of the elastic soft ring relative to the support when the elastic soft ring is subjected to extrusion force.

Preferably, the lower part of the lumbar support bracket is provided with a longitudinal sliding support part, and the sliding seat is connected to the front end of the sliding support part in a sliding way; a gear adjusting mechanism is arranged between the sliding seat and the sliding support part; the gear adjusting mechanism comprises an annular guide groove concavely arranged on the end surface of the sliding supporting part and gear adjusting teeth arranged in the annular guide groove; one side of the gear adjusting teeth is provided with positioning clamping grooves which are longitudinally spaced; a longitudinal adjusting piece capable of deflecting left and right is arranged in the sliding seat, and a clamping pin which is convexly matched in the annular guide groove and can be clamped with the positioning clamping groove is arranged on the adjusting piece; the adjusting piece always has the tendency of keeping straight; in the process of lifting the sliding seat, the clamping pins move upwards along the annular guide groove and can be sequentially clamped in the positioning clamping grooves under the aligning acting force of the adjusting piece; and in the descending and resetting process of the sliding seat, the bayonet pin moves downwards along the annular guide groove to reset.

Preferably, the annular guide groove comprises a longitudinal ascending channel positioned on one side of the gear adjusting tooth with the positioning clamping groove and a longitudinal resetting channel positioned on the other side of the gear adjusting tooth; in the process of ascending the sliding seat, the adjusting piece deflects towards one side of the ascending channel, and the clamping pins move upwards along the ascending channel and can be sequentially clamped into the positioning clamping grooves at different positions under the action of returning the adjusting piece; in the process of descending and resetting the sliding seat, the adjusting piece is deflected to one side facing the resetting channel from the ascending channel, and the clamping pin descends and resets along the resetting channel. The slide seat can be lifted up and lowered down to reset by moving the clamping pin for a circle along the annular guide groove; the lifting adjustment of the sliding seat is stable; and in the ascending process, the clamping pins are clamped with the positioning clamping grooves at different positions, so that the sliding seat is provided with a plurality of adjusting gears.

Preferably, a containing groove for containing the adjusting piece is arranged in the sliding seat; the lower end of the adjusting piece is rotatably connected in the accommodating groove, and the bayonet lock is arranged at the upper end of the adjusting piece and is backwards clamped in the annular guide groove; elastic pieces which are transversely arranged are respectively arranged on the two sides of the adjusting piece; one end of each elastic piece is connected with the side end of the adjusting piece, and the other end of each elastic piece is connected with the side wall of the accommodating groove; the elastic member can be elastically deformed in response to the deflecting motion of the adjusting member to provide an elastic force to restore the adjusting member to the straight state again. The adjusting piece is hidden in the sliding seat, so that the structure is attractive; and under the action of the elastic piece, the adjusting piece always has the tendency of returning to the positive reset after deflecting.

Preferably, the waist rest framework is detachably connected with the side waist support body; the waist rest framework comprises longitudinal bar-shaped side rods respectively positioned at the left side and the right side, a lower cross rod respectively arranged at the bottom of each bar-shaped side rod and an upper cross rod respectively arranged at the upper end of each bar-shaped side rod; the rear end of each side waist supporting body is correspondingly provided with an upper caulking groove, a side caulking groove and a lower caulking groove which can be matched with the upper cross rod, the strip-shaped side rods and the lower cross rod respectively. Then the waist leans on the skeleton can imbed on the side waist supporter for both connect conveniently, and connect the back wholeness good.

Preferably, the waist back framework is made of nylon, and the side waist support body is made of tpu soft rubber. The waist support framework is made of nylon materials, so that the waist support framework has good toughness and can provide enough support; the waist rest framework is arranged into a frame type structure, so that elastic deformation along the vertical direction is more convenient; the side waist support body is made of TPU soft rubber, is easy to deform and has good ductility; then the waist support piece formed by combining the waist support framework and the side waist support body can keep the whole shape of the waist support, so that the deformation effect of the waist support piece in the vertical direction is good; the support performance of the waist support piece can be ensured; avoid a monoblock structure to lead to deformation and labouring.

Preferably, the upper part of the waist support is provided with ring arms extending towards two sides respectively, and the left side and the right side of the upper end of the waist support are provided with upper rotating supports rotatably connected with the ring arms respectively; the middle position department of waist support piece bottom is equipped with two and controls the lower support that rotates of spaced being used for being connected with the slide rotation, and the slide centre gripping rotates between the support under two. The waist support piece and the waist support frame are connected in a triangular three-point manner, and the connecting structure is stable; and the sliding seat is connected between the two lower rotating supports, so that the sliding seat and the lumbar support are stably connected.

Preferably, the upper rotating support comprises a first upper rotating convex rib arranged on the waist support framework and a second upper rotating convex rib which is arranged at the corresponding position of the upper end of the side waist support body and extends backwards; the first upper rotating convex rib and the second upper rotating convex rib are overlapped left and right. The first upper rotating convex rib and the second upper rotating convex rib are overlapped left and right to form an upper rotating support together, so that the structural integrity is good; and go up to rotate the support and adopt horizontal round pin axle and waist to lean on the support to rotate usually and be connected, and the round pin axle can also make simultaneously rotate the fin on first and rotate the fin on the second and link together about, make the junction structure firm.

Preferably, the lower rotating support comprises two rotating bulges which are arranged at the lower end of the waist rest framework and are spaced from each other left and right and protrude backwards, and lower rotating convex ribs which are correspondingly arranged at the corresponding positions of the lower ends of the side waist support bodies and protrude backwards; the rotating protrusion is internally provided with a connecting groove with an opening at the front end, and the lower rotating convex rib is embedded into the connecting groove. The lower rotation convex rib is embedded into the rotation protrusion to form a lower rotation support, the lower rotation support is also connected in a rotating mode through a transverse pin shaft, the lower rotation convex rib can be connected with the rotation protrusion through the connection pin shaft, the connection step is saved, and the structural strength of the connection position is improved.

Still further, a chair is provided, which comprises the chair back.

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

firstly, the chair back based on the human engineering of the invention is characterized in that the upper back component comprises two side back units which are arranged side by side left and right, and the lumbar support piece also comprises two side lumbar support bodies which are arranged side by side left and right; the chair back is of a four-back structure, and can support the back of a user in a partition mode in a targeted mode. The two side back units are connected together through an elastic block; make between two side back units can contract and expand outward around can for the user leans on two side back units back, and two side back units can the human back of self-adaptation laminating, match human dynamic position of sitting, make the user body feel more comfortable. The elastic soft ring is clamped between the support and the connecting seat and can be extruded and deformed, so that the soft connection between the support and the connecting seat is realized; in the process that the user leans backwards on the chair back, the elastic soft ring can play an elastic buffering role, the back of the user is relieved, and the support is prevented from being stiff. The whole waist support piece is arched forwards to achieve the waist supporting effect and conform to the back ergonomic curve; the waist support piece can also adjust the waist supporting degree according to users with different body types or the requirements of the users; the use is more humanized; the waist support is formed by combining a waist support framework and a side waist support body, so that the waist support is easier to deform and keeps the support property.

Secondly, limiting the side connecting block and the mounting socket by connecting the rear cover; the connecting rear cover is provided with a limiting column and a connecting steel buckle; the plug block and the mounting socket can be stably inserted and connected through the limiting column; the arc-shaped inverted teeth can elastically contract to a certain degree, and when the connecting steel buckle passes through the second connecting through hole and the first connecting through hole, the arc-shaped inverted teeth can contract towards the center; after the connecting steel buckle completely passes through the first connecting through hole, the arc-shaped inverted teeth elastically reset to be in toothed connection with the front and the back of the insert block, and the elastic block is an elastic rubber body, so that the arc-shaped inverted teeth can be partially clamped into the side connecting block, and the insert block is limited to be separated from the mounting socket; the connection operation is convenient. Make and connect the back lid and can enough regard as the dress trim cover, can also play and connect limiting displacement.

Furthermore, the waist support piece is formed by the front-back butt joint of a waist support framework and two side waist support bodies; the waist rest framework is embedded in the rear end of the side waist support body, so that the structure integrity is good and the appearance is attractive; the waist support framework is made of nylon materials, so that the waist support framework has good toughness and can provide enough elastic support; the waist rest framework is arranged into a frame type structure, so that elastic deformation along the vertical direction is facilitated; the side waist support body is made of TPU soft rubber, is easy to deform and has good ductility; then the waist support piece formed by combining the waist support framework and the side waist support body can keep the whole shape of the waist support, and the deformation effect of the waist support piece in the vertical direction is good; compared with the waist support made of a whole elastic structure in the prior art, the waist support is easier and more labor-saving to deform. The strip-shaped side rods, the upper cross rods and the lower cross rods of the waist support framework can provide enough support strength for users, so that the support performance of the waist support is not problematic; and the front end surface of the bar-shaped side lever is provided with a plurality of longitudinally spaced grooves; thereby the thickness interval staggers on making the bar side lever, makes it take place the elastic bending deformation more easily.

In addition, a gear adjusting mechanism is arranged between the sliding seat and the sliding support part, so that the sliding seat can be adjusted in a lifting way along the sliding support part and has a multi-gear adjusting position; then the lower end of the waist support piece can be driven to ascend by the ascending of the action sliding seat, so that the waist support piece is correspondingly elastically deformed along the longitudinal direction to be ejected forwards, and the waist support piece also has a multi-gear waist ejecting state; the waist support can be retracted backwards by descending and resetting the seat sliding seat; thereby being capable of conveniently adjusting the waist supporting degree of the waist support piece. And the user only needs to directly apply acting force to the sliding seat to enable the sliding seat to move up and down, so that the position of the sliding seat can be adjusted, the sliding seat can be adjusted without leaving the seat surface, and the operation is light and convenient.

Drawings

FIG. 1 is a side view of an embodiment of the chair back of the present invention;

FIG. 2 is a perspective view of the entire chair back according to an embodiment of the present invention;

FIG. 3 is a schematic front perspective view of a side back unit coupled to a back frame according to an embodiment of the present invention;

FIG. 4 is a schematic back side perspective view of a side back unit connected to a back frame according to an embodiment of the present invention;

FIG. 5 is a schematic perspective view of a connection between two side units and a back unit according to an embodiment of the present invention;

FIG. 6 is a schematic perspective view of the connection between the elastic block and the side back unit according to the embodiment of the present invention;

FIG. 7 is a schematic perspective view of an elastic block according to an embodiment of the present invention;

FIG. 8 is a schematic perspective view of the connection of the rear cover with the mounting socket and the plug in accordance with the exemplary embodiment of the present invention;

FIG. 9 is a perspective view of a support arm connected to a side back unit according to an embodiment of the present invention;

FIG. 10 is an exploded view of a support arm and support base assembly according to an embodiment of the present invention;

FIG. 11 is an exploded view of an alternative angle of attachment of the arm to the support base in accordance with an embodiment of the present invention;

FIG. 12 is a schematic back perspective view of a lumbar support and lumbar support bracket connection in an embodiment of the present invention;

figure 13 is a front perspective view of a lumbar support and lumbar support bracket connection in an embodiment of the present invention;

FIG. 14 is a schematic perspective view of a lumbar support framework in combination with a lateral lumbar support in an embodiment of the present invention;

FIG. 15 is a schematic perspective view of another embodiment of the lumbar support frame and the side lumbar support according to the present invention;

figure 16 is a schematic perspective view of a lumbar support in an embodiment of the present invention;

FIG. 17 is a schematic perspective view of the sliding seat and the sliding support part in sliding fit according to the embodiment of the present invention;

FIG. 18 is a schematic perspective view of an embodiment of the invention in which the adjustment member is engaged with the annular guide groove;

FIG. 19 is a perspective view of an adjustment member positioned within a carriage in accordance with an embodiment of the present invention;

fig. 20 is a perspective view of an annular guide groove according to an embodiment of the present invention.

The figures are numbered: a back support 1; an upper back assembly A; a side back unit 2; a support arm 3; a support 4; an elastic soft ring 5; an elastic block 6; a main support block 6 a; a side connection block 6 b; an inside lever 7; an outside lever 8; a first limit projection 9; a connecting column 10; mounting holes 10 a; a first groove 11; a connecting base 12; a decorative cover 12 a; a second limit projection 13; a second groove 14; a connecting hole 15; a mounting groove 16; a damping rubber ring 17; mounting holes 171; a spacer 171; a bolt 172; a mounting socket 18; an insert block 19; a slot 20; a first stopper hole 21; the first connecting through hole 22; a notch 22 a; a second stopper hole 23; a second connecting via 24; the rear cover 25 is attached; a stopper post 26; connecting steel buckles 27; the arc-shaped inverted teeth 27 a; a positioning post 28; a latch block 29; a card slot 30; a lumbar support 31; a lumbar support bracket 32; the slide support portion 32 a; a slide 33; the ring arms 34; a rotary mounting seat 34 a; an upper rotating support 35; a lumbar support frame 311; a side waist support 312; a bar-shaped side bar 36; a lower cross bar 37; an upper cross bar 38; a support rail 39; the rotating projection 40; an upper caulking groove 381; a side insert groove 361; a lower caulking groove 371; a groove 41; the first rotating rib 351; the second rotation rib 352; the lower turning rib 42; a connecting groove 43; a lower rotating support 44; a guide groove 45; a guide strip 46; an annular guide groove 47; the rising channel 47 a; the reset channel 47 b; gear adjustment teeth 48; a positioning slot 49; a receiving groove 50; an adjusting member 51; a detent 52; an avoidance groove 53; an elastic member 54.

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, taken in conjunction with the accompanying drawings and detailed description, is set forth below. 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:

as shown in fig. 1-20, the present invention provides an ergonomic chair back, which comprises a back support 1 and an upper back assembly a disposed on the back support 1, wherein the upper back assembly a comprises two side back units 2 which are arranged side by side left and right; the upper part of the back bracket 1 is provided with support arms 3 which respectively extend towards the left side and the right side, and the outer side of each side back unit 2 is provided with a support 4 connected with the support arms 3; the support arm 3 and the support 4 are connected together in a front-back manner, and an elastic soft ring 5 capable of being extruded and deformed is clamped between the support arm and the support; support arm 3 and support 4 realize "flexible coupling" under the effect of the soft circle of elasticity 5 for the user leans on the in-process on last back of the body subassembly A backward, and the soft circle of elasticity 5 can play the effect of elastic buffer, and the user back of releiving avoids supporting the nothing hard. Moreover, an elastic block 6 is arranged between the two side back units 2, and the elastic block 6 is made of elastic rubber; the elastic block 6 comprises a main supporting block 6a clamped between the two side back units 2 in the longitudinal direction, and side connecting blocks 6b which are perpendicular to the main supporting block 6a and respectively extend towards two sides from the main supporting block 6a and are used for being connected with the side back units 2; the two side connecting blocks 6b can elastically bend and deform relative to the main supporting block 6a respectively, so that the two side back units 2 can elastically contract inwards or expand outwards relative to the back support 1 along the front-back direction, and after a user leans against the two side back units 2, the two side back units 2 can be attached to the back of the human body in a self-adaptive manner, so that the user feels more comfortable; and when the back side supporting piece 2 moves, the elastic soft ring 5 can be extruded between the supporting arm 3 and the supporting seat 4 to generate corresponding deformation, so that the fracture of the joint is avoided. In addition, a lumbar support 31 positioned below the upper back component A is also arranged on the back support 1, and the lumbar support 31 can support the waist of a user to form a support for the natural bending position of the lumbar so as to compound an engineering curve of the back of the human body; and the waist supporting degree of the lumbar support 31 can also be adjusted.

As shown in fig. 1 to 11, the side back unit 2 has a rectangular frame structure, and the side back unit 2 includes an inner rail 7 and an outer rail 8 spaced left and right; the elastic block 6 is connected between the inner side rods 7 of the two side back units 2. The support 4 is arranged on the outer side rod 8 of each side back unit 2, and the support 4 extends towards the center direction of the side back unit 2. The concrete connection structure between the support 4 and the support arm 3 is as follows: a first limiting bulge 9 protruding backwards is arranged at the end part of the support 4, a connecting column 10 extending backwards is arranged on the first limiting bulge 9, and an installation hole 10a with internal threads is arranged on the end surface of the connecting column 10; the elastic soft ring 5 is also an elastic rubber body, and the front end of the elastic soft ring 5 is provided with a first groove 11 matched with the first limiting bulge 9; the elastic soft ring 5 can be attached to the rear end of the support 4, so that the first limiting bulge 9 is embedded into the first groove 11; and the connecting column 10 is simultaneously threaded backwards out of the elastic soft ring 5. A connecting seat 12 with the contour matched with that of the elastic soft ring 5 is arranged at the end part of the support arm 3, a second limiting bulge 13 protruding forwards is arranged at the front end of the connecting seat 12, and correspondingly, a second groove 14 is arranged at the rear end of the elastic soft ring 5; a connecting hole 15 penetrating through the connecting base 12 in the front and rear direction is formed at the front end of the second limiting protrusion 13; in addition, the rear end of the connecting base 12 is also provided with an installation groove 16 avoiding the connecting column 10; during assembly, the first limiting bulge 9 is embedded in the first groove 11, and the second limiting bulge 13 is embedded in the second groove 14, so that the support 4, the elastic soft ring 5 and the connecting seat 12 are tightly attached to each other front and back; the connecting column 10 passes through the elastic soft ring 5 and the connecting hole 15 backwards and is positioned in the mounting groove 16. The first limiting bulge 9 is embedded in the first groove 11, and the second limiting bulge 13 is embedded in the second groove 14, so that the elastic soft ring 5 can be tightly clamped between the support 4 and the connecting seat 12, and the deviation of the elastic soft ring 5 is avoided; in addition, the front end of the elastic soft ring 5 is provided with an arc-shaped fixture block 29 protruding forwards, and an arc-shaped clamping groove 30 is correspondingly arranged at the corresponding position of the rear end of the support 4; the clamping block 29 is clamped in the clamping groove 30, so that the elastic soft ring 5 and the support 4 can be circumferentially fixed, and the elastic soft ring 5 is prevented from rotating relative to the support 4 when being subjected to extrusion force; so that the elastic soft ring 5 is firmly clamped between the support 4 and the connecting seat 12.

As shown in fig. 10 and 11, a damping rubber ring 17 is further disposed in the mounting groove 16, and a through hole for the connecting column 10 to pass through is disposed on the damping rubber ring 17; the damping rubber ring 17 is embedded in the mounting groove 16, and the connecting column 10 is arranged in the damping rubber ring 17 in a penetrating manner; and the damping rubber ring 17 is tightly attached to the inner wall of the mounting groove 16; then, a gasket 171 and a bolt 172 are sequentially arranged at the rear end of the connecting column 10, and the bolt 172 penetrates through the gasket 171 and is connected in the mounting hole 10 a; thereby fixing the connection post 10 in the mounting groove 16; so that the support 4 and the arm 3 are firmly connected back and forth. Under the action of the damping rubber ring 17, the connecting column 10 cannot be directly contacted with the connecting seat 12, and the damping rubber ring 17 is coated outside the connecting column 10; so that the connecting column 10 can act on the damping rubber ring 17 in an extruding way; moreover, under the action of the elastic soft ring 5, the support 4 and the support arm 3 can move mutually to extrude the elastic soft ring 5, so that the support 4 and the support arm are not in rigid connection; then the 'soft connection' between the support seat 4 and the support arm 3 can be realized, so that the support seat 4 and the support arm can move in a certain range, namely the support seat 4 can deflect left and right, up and down in a certain range relative to the connecting seat 12; in the process that a user leans back on the upper back assembly A, the elastic soft ring 5 can play an elastic buffering role, the back of the user is relieved, and the support is prevented from being stiff. In addition, a decoration cover 12a is connected to the rear end of the installation base 12, and the decoration cover 12a can cover the installation groove 16, thereby hiding the connection trace and beautifying the appearance.

As shown in fig. 3-8, the two side back units 2 are connected together through the elastic block 6, and a mounting socket 18 is arranged at the middle position of the rear end of the inner side frame 7 of each side back unit 2; the side connecting block 6b is matched with the mounting socket 18 in a plugging manner; specifically, the method comprises the following steps: the middle position of the side connecting block 6b is provided with an interval to form two insertion blocks 19 which are independent up and down; correspondingly, two slots 20 which are spaced up and down are arranged on the inner side of the mounting socket 18; when in connection, the side connecting block 6b is matched with the mounting socket 18 in an inserting way, so that the inserting block 19 is inserted into the inserting slot 20; and the mounting socket 18 protrudes backwards from the inner rod 7, so that the side connecting block 6b can be provided with enough thickness to ensure the structural strength of the connecting part.

Further comprising: each insertion block 19 is provided with two longitudinally spaced first limiting holes 21 and two first connecting through holes 22 distributed on the left and right sides of the first limiting hole 21. A second limiting hole 23 which is overlapped with the first limiting hole 21 in front and back and a second connecting through hole 24 which is overlapped with the first connecting through hole 22 in front and back are correspondingly arranged on the rear end surface of the mounting socket 18. A connecting rear cover 25 is further assembled at the rear end of the mounting socket 18, and the connecting rear cover 25 is provided with limiting columns 26 which are longitudinally spaced and used for being matched with the first limiting hole 21 and the second limiting hole 23; and a connection steel buckle 27 for passing through the first connection via hole 22 and the second connection via hole 24, wherein the connection steel buckle 27 is a steel sheet extending backwards around and having arc-shaped inverted teeth 27a distributed on the periphery, a hole is formed in the middle of the connection steel buckle 27 for a screw to pass through, a positioning column 28 is correspondingly arranged on the connection rear cover 25, and the connection steel buckle 27 is connected on the positioning column 28 by a screw, so that the connection steel buckle 27 is stably arranged on the connection rear cover 25. After the side connecting block 6b is inserted into the mounting socket 18, the connecting rear cover 25 is covered at the rear end of the mounting socket 18, so that the limiting column 26 sequentially penetrates through the second limiting hole 23 and the first limiting hole 21; the connecting steel buckle 27 sequentially passes through the second connecting through hole 24 and the first connecting through hole 22, and the arc-shaped inverted tooth 27a is in front-back tooth connection with the insert block 19; the method specifically comprises the following steps: the arc-shaped inverted tooth 27a can elastically contract to a certain degree, and when the connecting steel buckle 27 passes through the second connecting through hole 24 and the first connecting through hole 22, the arc-shaped inverted tooth 27a contracts towards the center; after the connecting steel buckle 27 completely passes through the first connecting through hole 22, the arc-shaped inverted tooth 27a is elastically reset so as to be in front-back tooth joint with the insert block 19, and the side connecting block 6b is an elastic rubber body, so that the arc-shaped inverted tooth 27a can be partially clamped into the side connecting block 6 b; then, after the rear connecting cover 25 is assembled on the mounting socket 18, the limiting column 26 can ensure that the plug block 19 is stably inserted into the mounting socket 18, so that the side connecting block 6b cannot be separated from the mounting socket 18; the arc-shaped inverted teeth 27a are in toothed connection with the insert block 19, so that the connection of the rear cover 25 and the detachment of the mounting socket 18 can be limited; the side connecting block 6b is stably inserted into the mounting socket 18, and the connecting structure is simple and stable; the rear cover 25 can be connected to achieve the decoration effect, and can also achieve the connection limiting effect and achieve the dual functions.

And as shown in fig. 4 to 6, the first coupling through-hole 22 located outside the insert block 19 is formed with a notch 22a at a side end of the insert block 19; the first connecting through hole 22 is large in size to keep the connecting steel buckle 27 to pass through; in order to avoid interference during assembly, a notch 22a is provided at the first connecting through hole 22 located outside the insert block 19, so that the installation is smoother.

In addition, the main supporting block 6a is perpendicular to the side connecting block 6b, and the front end and the rear end of the main supporting block 6a are protruded out of the side connecting block 6 b; when the side connecting block 6b and the mounting socket 18 are assembled; the main supporting block 6a is clamped between the two inner side rods 7, and the front-back length of the main supporting block 6a is not less than the front-back thickness of the side-back unit 2, so that the main supporting block 6a can be stably clamped between the two inner side rods 7 to provide a supporting function; the left and right thickness of the main supporting block 6a is between 5 and 15 mm; the main support block 6a is made to have a certain thickness, so that the structure is stable; but the thickness cannot be too large either, resulting in too large a separation of the two side back units 2.

Through above-mentioned connection structure then, make two side connection blocks 6b can be respectively relative main tributary supporting block 6a elastic deformation to make and contract and expand outward around between two side back of the body units 2, make the user lean on two side back of the body units 2 on the back, two side back of the body units 2 can the self-adaptation laminating human back, make user back both sides can not lose the support all the time, make the user feel more comfortable. In addition, the support 4 and the support arm 3 are in flexible connection under the action of the elastic soft ring 5 and the damping rubber ring 17, so that the support 2 can be correspondingly deformed when moving, elastic buffering is provided, and the support is prevented from being harsh; thereby realizing the self-adaptive function of the backrest.

As shown in fig. 1-2 and 12-20, a lumbar support bracket 32 is further mounted at the front end of the lower part of the back bracket 1; the upper end and the lower end of the lumbar support 31 are respectively connected to the lumbar support bracket 32 in a rotating manner; the lumbar support 31 has elasticity and the middle position is arched forward, so that the lumbar support 31 can support the waist of the user. A longitudinal sliding support part 32a is arranged at the lower part of the lumbar support bracket 32, and a sliding seat 33 is arranged on the sliding support part 32a in a sliding way; the slide base 33 can slide up and down along the slide support portion 32 a; a gear adjusting mechanism is arranged between the sliding seat 33 and the sliding support part 32a, so that the sliding seat 33 can rise along the sliding support part 32a and stay at gear positions with different heights; the lower end of the lumbar support 31 is rotatably connected to the sliding seat 33; then the lower end of the lumbar support 31 can be driven to move up and down by the action sliding seat 33 moving up and down, so that the lumbar support 31 correspondingly generates elastic deformation along the longitudinal direction to be ejected forwards or retracted backwards; so that the top waist degree of the lumbar support 31 can be adjusted according to the user's needs.

As shown in fig. 13-16, the lumbar support 31 includes a lumbar frame 311 having a frame-type structure and two lateral lumbar supports 312 connected to the front end of the lumbar frame 311 and arranged side by side; specifically, the method comprises the following steps: the waist rest framework 311 is of a bilateral symmetry structure, and the waist rest framework 311 comprises longitudinal bar-shaped side bars 36 respectively positioned at the left and right sides, a lower cross bar 37 respectively arranged at the bottom of each bar-shaped side bar 36, and an upper cross bar 38 respectively arranged at the upper end of each bar-shaped side bar 36. The two upper cross rods 38 are spaced from each other left and right, the two lower cross rods 37 are connected with a supporting cross rod 39 which is used for being connected and matched with the sliding seat 33, and two rotating protrusions 40 which are spaced from each other left and right and protrude backwards are arranged on the supporting cross rod 39. The waist support frame 311 is made of nylon material and has certain toughness. Further comprising: the side waist support body 312 is made of TPU soft rubber, and the rear end of each side waist support body 312 is provided with an upper caulking groove 381, a side caulking groove 361 and a lower caulking groove 371 which can be respectively matched with the upper cross bar 38, the strip-shaped side bar 36 and the lower cross bar 37; the side waist support 312 can be connected with the waist back frame 311 in a front-back manner, so that the upper cross bar 38 is embedded in the upper caulking groove 381, the bar-shaped side bars 36 are embedded in the side caulking grooves 361, and the lower cross bar 37 is embedded in the lower caulking groove 371. The supporting cross bar 39 is connected to the rear end surfaces of the two lower cross bars 37, so that the structural strength is enhanced, and the two side waist supporting bodies 312 are kept to synchronously move up and down; the support rail 39 is protruded rearward from the lower rail 37 so that the support rail 39 does not interfere with the side lumbar support 312; so that the lumbar support frame 311 can be stably attached to and support the two side lumbar support bodies 312. Adopt above-mentioned structural design's aim at: the waist rest framework 311 is of a frame type structure made of nylon materials, has good toughness and can provide support, and the frame type structure is more favorable for elastic deformation in the vertical direction; the side waist support body 312 is made of TPU soft rubber, so that the deformation is easy and the side waist support body has good ductility; the waist support piece 31 formed by combining the two can keep the whole shape of the waist support, and the deformation effect of the waist support piece 31 in the vertical direction is good, so that the process of adjusting the waist supporting degree is easy and labor-saving. Otherwise if the lumbar support 31 is made entirely of nylon or elastic plastic, the one-piece structure is deformed laboriously, making the adjustment operation laborious. Further, as shown in fig. 14, a plurality of longitudinally spaced grooves 41 are further provided on the front end surface of the bar-shaped side bar 36, so that the bar-shaped side bar 36 is staggered in thickness and thickness, and is more easily elastically deformed, and the deformation of the bar-shaped side bar 36 can directly deform the side waist support 312 to adjust the top waist degree; thereby the adjusting operation is easier and more labor-saving.

Further, a first upper turning rib 351 protruding rearward is provided at an outer side end of each upper rail 37, and a second upper turning rib 352 protruding rearward is provided at an upper end of each side waist support 312; when the side lumbar support 312 and the lumbar frame 311 are in front-back butt joint, the first upper rotating rib 351 and the second upper rotating rib 352 can be overlapped left and right to form the upper rotating support 35. The upper end of the waist support 32 is provided with a ring arm 34 extending towards two sides, and the end part of the ring arm 34 is provided with a rotary mounting seat 34 a; the rotary mounting seat 34a is configured to be rotatably connected to the upper rotary support 35; and rotate and adopt the horizontal round pin axle to rotate to be connected between mount pad 34a and the last support 35 that rotates for rotate the connection back, the round pin axle can also rotate fin 351 on the first and rotate fin 352 on the second simultaneously and carry on spacingly, make the waist of inclining to support 312 upper end and the waist lean on skeleton 311 upper end to link together, avoid the waist to lean on skeleton 311 and incline waist support 312 to break away from. In the elastic deformation process of the lumbar support 31, the upper rotating support 35 can rotate relative to the rotating mounting seat 34a in a self-adaptive manner, so that the connection part is prevented from being broken under stress; the loop arms 34 on both sides are connected to both sides of the upper end of the lumbar support 31, respectively, so that the lumbar support 31 can be stably supported. Furthermore, as shown in fig. 14-16, a lower rotating rib 42 protruding backward is further provided at a position corresponding to the rotating protrusion 40 at the lower end of the side waist support 312, a connecting groove 43 for the lower rotating rib 42 to penetrate is provided at the front end of the rotating protrusion 40, and after the lumbar support frame 311 is connected with the side waist support 312, the lower rotating rib 42 can just be embedded into the connecting groove 42, and the two together form a lower rotating support 44; the lower rotation support 44 is configured to be rotatably connected to the slide base 33, and the lower rotation rib 42 is rotatably connected to the slide base 33 together with the rotation protrusion 40 by using a pin shaft, so that the lower end of the lumbar support 312 and the lower end of the lumbar support frame 311 can be connected together as well. By adopting the rotating structure, the waist support piece 31 and the waist support bracket 32 can be connected, and the waist support frame 311 and the side waist support body 312 can be stably connected together, so that the connecting steps are saved; the structure design is ingenious.

As shown in fig. 12-13 and 17-20, the sliding seat 33 is slidably connected to the front end of the sliding support portion 32a, longitudinal guide grooves 45 are respectively formed on the left and right sides of the sliding support portion 32a, and a guide bar 46 slidably fitted in the guide grooves 45 is correspondingly formed on the rear end of the sliding seat 33, so that the sliding seat 33 can stably slide up and down along the sliding support portion 32a, and the guide bar 46 is fitted in the guide grooves 45 to limit the sliding seat 33 from being separated from the sliding support portion 32a back and forth. Specifically, the method comprises the following steps: the gear adjusting mechanism is arranged between the sliding seat 33 and the sliding support part 32a, and comprises an annular guide groove 47 concavely arranged on the front end surface of the sliding support part 32a and gear adjusting teeth 48 arranged in the annular guide groove 47; one side of the gear adjusting teeth 48 is provided with positioning slots 49 which are longitudinally spaced, and the positioning slots 49 are obliquely arranged upwards; the annular guide groove 47 comprises a longitudinal ascending channel 47a positioned on one side of the gear adjusting tooth 48 with the positioning clamping groove 49 and a longitudinal resetting channel 47b positioned on the other side of the gear adjusting tooth 48; and the upper end of the rising channel 47a is higher than the upper end of the return channel 47 b. A containing groove 50 is arranged in the sliding seat 33, a longitudinal adjusting piece 51 is arranged in the containing groove 50, and the lower end of the adjusting piece 51 is rotatably connected with the sliding seat 33, so that the adjusting piece 51 can deflect left and right; the upper end of the adjusting piece 51 is provided with a bayonet 52 which extends backwards in the annular guide groove 47 and can be clamped with the positioning bayonet groove 48; an arc-shaped avoiding groove 53 for avoiding the movement of the detent 52 is arranged on the sliding seat 33. And the adjusting piece 51 always has a tendency of keeping straight, specifically: elastic pieces 54 transversely arranged are respectively arranged at two sides of the adjusting piece 51, and the elastic pieces 54 are positioned in the accommodating groove 50; each of the elastic members 54 has one end coupled to a side end of the adjusting member 51 and the other end coupled to a side wall of the accommodating groove 50. Such that, in turn, when the adjustment member 51 is deflected, the resilient member 54 will deform and provide a spring force to return the adjustment member 51 to the straight state again.

As shown in fig. 19 to 20, from bottom to top, both the lower end and the upper end of the shift position regulating tooth 48 are inclined sides that are inclined upward in the direction of the upward groove 47 a; then, when the user acts on the slide seat 33 to ascend along the slide support portion 32a, the adjusting member 51 will deflect to make the detent 52 enter the ascending channel 47a and ascend along the ascending channel 47 a; when the bayonet 52 moves to the position of one of the positioning bayonet grooves 49, the adjusting piece 51 can automatically align to ensure that the bayonet 52 is clamped into the positioning bayonet groove 49 by the ascending channel 47 a; at the moment, the sliding seat 33 is loosened, and the clamping pin 52 is clamped with the positioning clamping slot 49 up and down to enable the sliding seat 33 to stay at the height adjusting position; if the slide 33 is to be adjusted further, the slide 33 is simply acted upon to continue its upward movement, and the adjusting element 51 is deflected again so that the detent 52 is lifted out of the detent groove 49 and again into the lifting channel 47 a; therefore, in the process of lifting the sliding seat 33, the clamping pins 52 can be sequentially clamped in the positioning clamping grooves 49 with different heights, so that the sliding seat 33 has a multi-gear adjusting position, the adjusting process is very convenient, and only acting force needs to be directly applied to the sliding seat 33 to enable the sliding seat 33 to move. When the sliding seat 33 needs to be lowered and reset after being lifted, the sliding seat 33 only needs to be lifted to the maximum height, and then the adjusting piece 51 automatically deflects to return and align so that the bayonet 52 enters the reset channel 47b from the upper end of the lifting channel 47 a; the carriage 33 can then be moved directly downward to the home position and the detent 52 will be lowered along the reset channel 47b for reset. Then the bayonet 52 moves for one circle along the annular guide groove 47, so that the ascending adjustment and descending reset of the sliding seat 33 can be realized; the lifting adjustment of the sliding seat 33 is stable, and the operation is very simple.

As shown in fig. 1, 12 and 13, the sliding seat 33 is in front-to-back butt fit with the supporting cross rod 39, so that the sliding seat 33 can be just clamped between two lower rotating supports 44, and each lower rotating support 39 is respectively connected with the side end of the sliding seat 33 in a rotating way; so that the lower end of the lumbar support 1 can be stably coupled to the slider 33. Then when the acting sliding seat 33 is lifted and adjusted, the lower end of the lumbar support 1 can be driven to move up and down, so that the lumbar support 1 can be elastically deformed correspondingly; when the action sliding seat 33 moves upwards for adjustment, the lumbar support 1 continuously arches forwards, so that the lumbar support effect is obvious; and the sliding seat 33 has a plurality of adjusting positions, so that the lumbar support 1 also has a multi-gear waist-up state correspondingly. When the waist supporting function is not needed, the waist support part 1 can be retracted to the initial position only by descending and resetting the action slide seat 33. And during the adjustment operation, the user directly acts on the slide seat 33 or the lower end of the waist support 1 to lift, and can adjust on the seat surface, thereby being capable of adjusting the waist supporting degree of the waist support 1 very conveniently and rapidly.

To sum up, the ergonomic chair back of the present invention comprises an upper back assembly a comprising two side back units 2 arranged side by side left and right, and a lumbar support 1 also comprising two side lumbar support 312 arranged side by side left and right; so that the chair back is in a four-back structure; the back of the user can be supported in a partitioned mode; the two side back units 2 of the upper back assembly A can elastically contract inwards or expand outwards, so that the upper back of a user can be always attached to match with the dynamic sitting posture change of the user; and the elastic soft ring 5 can also buffer the user, relieve the back of the user and avoid supporting the user. The lumbar support 312 is arched forwards to achieve the waist supporting effect, and the back ergonomic curve is met; the waist support 312 can also adjust the waist supporting degree according to users with different body shapes or the requirements of the users; the use is more humanized.

Claims

1. The utility model provides a back of chair based on ergonomic, its characterized in that includes back of the body support, be equipped with on the back of the body support:

the upper back assembly comprises two side back units which are arranged side by side at the left and the right and an elastic block connected between the two side back units; the upper part of the back bracket is provided with support arms which respectively extend towards the left side and the right side and are used for connecting and supporting the side back unit; the single support arm is connected to the outer side of the side back unit, the support arm and the side back unit are connected in a front-back mode, and an elastic soft ring capable of being extruded and deformed is arranged between the support arm and the side back unit; the elastic block is an elastic rubber body with a plate-shaped structure and comprises a main supporting block and side connecting blocks positioned on two sides of the main supporting block; the main supporting block is clamped between the two side back units, and each side back unit is configured to be in plug fit with the side connecting block; the two side back units can elastically contract inwards or expand outwards relative to the back support along the front-back direction;

the waist support piece is arranged below the upper back component and protrudes forwards from the upper back component; the waist support piece has elasticity, the middle position of the waist support piece is arched forwards, and the waist support piece comprises a waist support frame which is in a bilateral symmetry frame type structure and two side waist support bodies which are arranged on the waist support frame in a left-right side-by-side mode; the side waist support body is made of flexible materials, the waist support framework has elasticity and is configured to provide elastic support for the side waist support body;

the waist support is arranged at the lower part of the back support; the waist support piece is connected to the waist support frame, and the upper end and the lower end of the waist support piece are respectively in rotating fit with the waist support frame; a sliding seat capable of sliding and adjusting up and down along the waist support is arranged at the lower part of the waist support, and the lower end of the waist support is rotatably connected to the sliding seat; the lumbar support is capable of being elastically deformed in a longitudinal direction in response to the raising and lowering movement of the carriage to change its own degree of forward arching.

2. The ergonomic chair back of claim 1, wherein: the main supporting block is vertical to the side connecting block, and the front end and the rear end of the main supporting block are protruded out of the side connecting block; and a mounting socket is arranged at the middle position of the inner side of each side back unit, and the side connecting block is inserted and matched in the mounting socket.

3. The ergonomic chair back of claim 2, wherein: the side back unit is of a rectangular frame structure and comprises an inner side rod and an outer side rod which are spaced left and right; the elastic block is connected between the inner side rods of the two side back units; and the mounting socket is arranged at the middle position of the rear end of the inner side rod.

4. The ergonomic chair back of claim 2, wherein: the middle position department of side connecting block is equipped with the interval in order to form two independent inserted blocks from top to bottom, the inboard of installation socket corresponds is equipped with two slots that are separated from top to bottom, the inserted block is pegged graft and is cooperated in the slot.

5. The ergonomic chair back of claim 3, wherein: a connection rear cover is arranged at the rear end of each installation socket, is covered at the rear end of the installation socket and can limit the insertion block from separating from the slot; the plug block is provided with first limiting holes which are longitudinally spaced and first connecting through holes which are distributed on the left side and the right side of the first limiting holes; a second limiting hole which is overlapped with the first limiting hole in front and back and a second connecting through hole which is overlapped with the first connecting through hole in front and back are correspondingly arranged on the rear end face of the mounting socket; the connecting rear cover is correspondingly provided with a limiting column and a connecting steel buckle, and the limiting column is configured to sequentially penetrate through the second limiting hole and the first limiting hole; the connecting steel buckle is a steel sheet with the periphery extending backwards and arc-shaped inverted teeth distributed on the periphery; the connecting steel buckle is configured to sequentially penetrate through the second connecting through hole and the first connecting through hole so that the arc-shaped inverted teeth are in front-back tooth connection with the insert block.

6. The ergonomic chair back of claim 3, wherein: the outer side rod of the side back unit is provided with a support seat extending towards the center direction, and the end part of the support arm is provided with a connecting seat which is in front-back butt joint with the support seat; the elastic soft ring is clamped between the connecting seat and the support; a connecting column extending backwards is arranged at the rear end of the support; the rear end of the connecting seat is provided with an installation groove; the connecting column sequentially penetrates through the elastic soft ring and the connecting seat backwards and is positioned in the mounting groove; a damping rubber ring is also arranged in the mounting groove, and a through hole for the connecting column to pass through is formed in the damping rubber ring; the damping rubber ring is embedded in the mounting groove, the connecting column is arranged in the damping rubber ring in a penetrating mode, and the damping rubber ring is tightly attached to the inner wall of the mounting groove; and the rear end of the connecting column is provided with a gasket and a bolt, and the bolt penetrates through the gasket and is connected into the connecting column.

7. The ergonomic chair back of claim 6, wherein: the end part of the support is provided with a first limiting bulge protruding backwards, and the connecting column is arranged on the first limiting bulge and extends backwards; a first groove capable of being matched with the first limiting bulge is correspondingly arranged at the front end of the elastic soft ring; the front end of the connecting seat is provided with a second limiting bulge protruding forwards; correspondingly, a second groove capable of being matched with the second limiting bulge is formed in the rear end of the elastic soft ring; and a connecting hole which is penetrated through from front to back and used for avoiding the connecting column is arranged on the connecting seat, and the connecting hole is formed at the front end of the second limiting bulge.

8. The ergonomic chair back of claim 6, wherein: the elastic soft ring is matched with the support in a clamping manner, one of the elastic soft ring and the support is provided with an arc-shaped clamping groove, and the other one of the elastic soft ring and the support is correspondingly provided with an arc-shaped clamping block; the clamping block is clamped in the clamping groove so that the elastic soft ring is circumferentially fixed with the support.

9. The ergonomic chair back of claim 1, wherein: the lower part of the waist support is provided with a longitudinal sliding support part, and the sliding seat is connected to the front end of the sliding support part in a sliding manner; a gear adjusting mechanism is arranged between the sliding seat and the sliding support part; the gear adjusting mechanism comprises an annular guide groove concavely arranged on the end surface of the sliding supporting part and gear adjusting teeth arranged in the annular guide groove; one side of the gear adjusting teeth is provided with positioning clamping grooves which are longitudinally spaced; a longitudinal adjusting piece capable of deflecting left and right is arranged in the sliding seat, and a clamping pin which is convexly matched in the annular guide groove and can be clamped with the positioning clamping groove is arranged on the adjusting piece; the adjusting piece always has the tendency of keeping straight; in the process of lifting the sliding seat, the clamping pins move upwards along the annular guide groove and can be sequentially clamped in the positioning clamping grooves under the aligning acting force of the adjusting piece; and in the descending and resetting process of the sliding seat, the bayonet pin moves downwards along the annular guide groove to reset.

10. The ergonomic chair back of claim 9, wherein: the annular guide groove comprises a longitudinal ascending channel positioned on one side of the gear adjusting tooth with the positioning clamping groove and a longitudinal resetting channel positioned on the other side of the gear adjusting tooth; in the process of ascending the sliding seat, the adjusting piece deflects towards one side of the ascending channel, and the clamping pins move upwards along the ascending channel and can be sequentially clamped into the positioning clamping grooves at different positions under the action of returning the adjusting piece; in the process of descending and resetting the sliding seat, the adjusting piece is deflected to one side facing the resetting channel from the ascending channel, and the clamping pin descends and resets along the resetting channel.

11. The ergonomic chair back of claim 9 or 10, wherein: a containing groove for containing the adjusting piece is arranged in the sliding seat; the lower end of the adjusting piece is rotatably connected in the accommodating groove, and the bayonet lock is arranged at the upper end of the adjusting piece and is backwards clamped in the annular guide groove; elastic pieces which are transversely arranged are respectively arranged on the two sides of the adjusting piece; one end of each elastic piece is connected with the side end of the adjusting piece, and the other end of each elastic piece is connected with the side wall of the accommodating groove; the elastic member can be elastically deformed in response to the deflecting motion of the adjusting member to provide an elastic force to restore the adjusting member to the straight state again.

12. The ergonomic chair back of claim 1, wherein: the waist rest framework is detachably connected with the side waist support body; the waist rest framework comprises longitudinal bar-shaped side rods respectively positioned at the left side and the right side, a lower cross rod respectively arranged at the bottom of each bar-shaped side rod and an upper cross rod respectively arranged at the upper end of each bar-shaped side rod; the rear end of each side waist supporting body is correspondingly provided with an upper caulking groove, a side caulking groove and a lower caulking groove which can be matched with the upper cross rod, the strip-shaped side rods and the lower cross rod respectively.

13. The ergonomic chair back of claim 1 or 12, wherein: the waist back framework is made of nylon materials, and the side waist support body is made of tpu soft rubber materials.

14. The ergonomic chair back of claim 12, wherein: the upper part of the waist support is provided with ring arms extending towards two sides respectively, and the left side and the right side of the upper end of the waist support are provided with upper rotating supports rotatably connected with the ring arms respectively; the middle position department of waist support piece bottom is equipped with two and controls the lower support that rotates of spaced being used for being connected with the slide rotation, and the slide centre gripping rotates between the support under two.

15. The ergonomic chair back of claim 14, wherein: the upper rotating support comprises a first upper rotating convex rib arranged at the outer side of the upper cross bar of the waist support framework and a second upper rotating convex rib which is arranged at the corresponding position of the upper end of the side waist support body and extends backwards; the first upper rotating convex rib and the second upper rotating convex rib are overlapped left and right.

16. The ergonomic chair back of claim 14, wherein: the lower rotating support comprises two rotating bulges which are arranged at the lower end of the waist support frame, are spaced from each other at left and right and protrude backwards, and lower rotating convex ribs which are correspondingly arranged at the corresponding positions of the lower ends of the side waist support bodies and protrude backwards; the rotating protrusion is internally provided with a connecting groove with an opening at the front end, and the lower rotating convex rib is embedded into the connecting groove.

17. A kind of seat, its characteristic is: comprising a chair back as claimed in any one of claims 1 to 16.