阅读说明：本技术 一种座椅靠背及座椅 (Seat backrest and seat ) 是由 何基 金明华 于 2019-02-03 设计创作，主要内容包括：本发明涉及一种座椅靠背及座椅,包括背部支撑件,用以支撑背部支撑件的支撑架,设置于第一背部支撑件侧部和第一支撑架侧部之间的且在受到压力时会发生弯曲形变的弹性件,以及设置于第一背部支撑件侧部和第一支撑架侧部之间的第一支撑体；一种座椅,包括与第一支撑架侧部的下部、第二支撑架侧部的下部固定连接的座部,与现有技术相比,本发明将弹性件设置在靠背上部,可以使背部支撑件左右两侧无阻力,形变自由度很高,增强了用户脊柱纵向上的稳定性和支撑性,支撑架和第一支撑体又可以防止软背的过分形变和倾斜,舒适性佳,安全性好。(The invention relates to a seat backrest and a seat, which comprise a back support, a support frame for supporting the back support, an elastic part which is arranged between the side part of the first back support and the side part of the first support and can be bent and deformed when being stressed, and a first support body which is arranged between the side part of the first back support and the side part of the first support; compared with the prior art, the chair comprises the seat part fixedly connected with the lower part of the side part of the first support frame and the lower part of the side part of the second support frame, the elastic part is arranged on the upper part of the backrest, so that the left side and the right side of the back support part have no resistance, the deformation freedom degree is high, the longitudinal stability and the support performance of a spine of a user are enhanced, the support frame and the first support body can prevent the excessive deformation and the inclination of a soft back, the comfort is good, and the safety is good.)

1. A seat back, characterized by comprising:

a back support (100) having a first back support side (110), a second back support side (120), a back support upper portion (130), a back support lumbar portion (140);

a support frame (200) to support the back support (100) that is substantially rigid and has a first support frame side (210), a second support frame side (220), and a support frame upper portion (230);

at least 3 elastic members (300), the elastic members (300) being arranged in a row in a transverse direction and each being connected between the back support upper part (130) and the support frame upper part (230), the elastic members (300) including a front connection part (310) connected to the back support upper part (130), a rear connection part (320) connected to the support frame upper part (130), and a bending part (330) connected between the front connection part (310) and the rear connection part (320), the elastic members (300) being subjected to a bending deformation when being subjected to a pressure;

a first support (410) being substantially rigid and disposed between the first back support side (110) and the first support frame side (210).

2. A seat back according to claim 1, wherein: also included is a second support body (420) disposed symmetrically with the first support body (410), which is substantially rigid and disposed between the second back support side (120) and the second support frame side (220).

3. A seat back according to claim 1, wherein: the number of the elastic members (300) is greater than or equal to 5, and the interval between the back support upper part (130) and the support frame upper part (230) is uniform.

4. A seat back according to claim 1, wherein: the elastic piece (300) and the upper part (130) of the support frame are fixedly connected in a detachable mode.

5. A seat back according to claim 1, wherein: the first support (410) is integrally formed with the first back support side (110).

6. A seat back according to claim 1, wherein: the first support body (410) and the first support frame side portion (210) are in detachable fixed connection or rotary connection.

7. A seat back according to claim 1, wherein: the elastic pieces (300) are parallel to each other, and the longitudinal section of each elastic piece (300) is in any one or combination of any more of a straight line shape, a Y shape, an L shape, a T shape, a V shape and a Z shape.

8. A seat back according to claim 7, wherein: the elastic piece (300) is a straight elastic wing strip, the width of the elastic wing strip is 0.8 cm-2 cm, and the length of the elastic wing strip is 2.5cm-5 cm.

9. A seat back according to claim 1, wherein: a reinforced part (340) is arranged at the joint between the front connecting part (310) of the elastic part (300) and the upper part (130) of the back support part, and the reinforced part (340) and the elastic part (300) are integrally formed by adopting toughened flexible materials.

10. A seat back according to claim 1, wherein: the front connecting part (310), the bending part (330) and the rear connecting part (320) of the elastic part (300) are integrally formed by toughened flexible materials.

11. A seat back according to claim 1, wherein: the front connecting part (310) and the bending part (330) of the elastic part (300) and the rear connecting part (320) and the bending part (330) are fixedly connected in a detachable mode.

12. A seat back according to claim 1, wherein: the horizontal position of the front connecting part (310) of the elastic piece (300) is higher than the horizontal position of the rear connecting part (320).

13. A seat back according to claim 1, wherein: when the elastic part (300) is in a free state, the included angle between the elastic part (300) and the horizontal plane is 30-80 degrees.

14. A seat back according to claim 1, wherein: the support frame (200) is positioned at the rear side of the back support (100), the support frame (200) comprises a first upright post (240), a second upright post (250) and a support frame top cross bar (260) positioned at the edge of the upper part (230) of the support frame, and the back support (100) comprises a back support top cross bar (150) positioned at the edge of the upper part (130) of the back support; the front connection (310) of the elastic member (300) is connected to the back support top rail (150), and the rear connection (320) of the elastic member (300) is connected to the support frame top rail (260).

15. A seat back according to claim 14, wherein: the first upright post (240), the support frame top cross rod (260) and the second upright post (250) are sequentially connected to form a U-shaped structure.

16. A seat back according to claim 15, wherein: the support frame (200) further comprises a support frame bottom cross rod (270), and a closed support frame is formed by sequentially connecting the first upright post (240), the support frame top cross rod (260), the second upright post (250) and the support frame bottom cross rod (270).

17. A seat back according to claim 4, wherein: a notch (231) is formed in the upper portion (230) of the support frame, and a rear connecting portion (320) of the elastic piece (300) is inserted into the notch (321) to achieve plug connection between the upper portion (230) of the support frame and the elastic piece (300).

18. A seat back according to claim 17, wherein: the rear connecting part (320) of the elastic piece (300) is provided with a fixing protrusion (321), the support frame (200) comprises a support frame main body (280) and a support frame splicing piece (290) spliced on the support frame main body (280), a first groove (281) and a second groove (291) used for accommodating the fixing protrusion (321) are formed in the support frame main body (280) and the support frame splicing piece (290), the fixing protrusion (321) is accommodated into the first groove (291) and the second groove (291), and after the support frame main body (280) and the support frame splicing piece (290) are spliced, the elastic piece (300) is fixedly connected to the upper portion (230) of the support frame.

19. A seat back according to claim 18, wherein: a plurality of insertion grooves (282) are formed in the support frame main body (280), and a plurality of insertion tongues (292) are formed in the support frame splicing piece (290); the splicing tongue (292) is inserted into the splicing groove (282) to realize splicing connection between the support frame main body (280) and the support frame splicing piece (290), and then the screw is locked, and a decorative piece (283) used for covering the screw is connected to the outer part of the screw.

20. A seat back according to claim 18, wherein: the fixing protrusion (321) is provided at both side surfaces at one end of the elastic member (300).

21. A seat back according to claim 1, wherein: a gap (500) of 2-6cm is left between the first back support side (110) and the first support frame side (210), and the first support body (410) is connected in the gap at the position of the back support lumbar support (140).

22. A seat back according to claim 21, wherein: the first supporting body (410) is of an arch-shaped hollow structure or a triangular hollow structure, a first connecting end A (411) and a second connecting end A (412) which are spaced up and down are formed at the joint of the first supporting body (410) and the first back supporting part side part (110), and a third connecting end A (413) is formed at the joint of the first supporting body (410) and the first supporting frame side part (210).

23. A seat back according to claim 1, wherein: said back support (100) further comprising a back support lower portion (160); the first (110), upper (130), second (120) and lower (160) edges of the back support are connected in series to form a back support frame, which is substantially rigid and in which a flexible mesh structure (600) is provided.

24. A seat back according to claim 1, wherein: said back support (100) further comprising a back support lower portion (160); the first back support side (110), the upper back support (130), the second back support side (120) and the lower back support (160) are connected in series to form a back support frame, the back support frame is substantially flexible, and a flexible mesh structure (600) is arranged in the back support frame.

25. A seat back according to claim 24, wherein: the back support frame is less flexible than the mesh structure (600).

26. A seat back, characterized by comprising:

a back support (100) having a first back support side (110), a second back support side (120), a back support upper portion (130), a back support lumbar portion (140);

a support frame (200) to support the back support (100) that is substantially rigid and has a first support frame side (210), a second support frame side (220), and a support frame upper portion (230);

at least 3 elastic members (300), the elastic members (300) being arranged in a row in a transverse direction and each being connected between the back support upper part (130) and the support frame upper part (230), the elastic members (300) including a front connection part (310) connected to the back support upper part (130), a rear connection part (320) connected to the support frame upper part (130), and a bending part (330) connected between the front connection part (310) and the rear connection part (320), the elastic members (300) being subjected to a bending deformation when being subjected to a pressure;

a first support (410) being substantially rigid and disposed between the first back support side (110) and the first support frame side (210); the first supporting body (410) is of an arch-shaped hollow structure or a triangular hollow structure, a first connecting end A (411) and a second connecting end A (412) are formed at the connecting position of the first supporting body (410) and the first back supporting part side part (110), and a third connecting end A (413) is formed at the connecting position of the first supporting body (410) and the first supporting frame side part (210).

27. A seat back according to claim 26, wherein: also included is a second support body (420) disposed symmetrically with the first support body (410), which is substantially rigid and disposed between the second back support side (120) and the second support frame side (220).

28. A seat back according to claim 26, wherein: the first back support side part (110) at least comprises a first softer back support (111) and a first harder waist support (141) from top to bottom in sequence, wherein the first waist support (141) is positioned between a first connecting end A (411) and a second connecting end A (412), and the first waist support (141) does not deform or the deformation amount of the first waist support is lower than that of the first back support (111) when the first waist support is extruded by external force.

29. A seat back according to claim 26, wherein: the first back support side part (110) at least comprises a first back side support (111) and a first waist side support (141) from top to bottom in sequence, wherein the first waist side support (141) is positioned between a first connecting end A (411) and a second connecting end A (412); the first back side support (111) and the first waist side support (141) are both rigid and do not deform when pressed by an external force.

30. A seat back according to claim 26, wherein: the first support frame side portion (210) is provided with a first bend (211) which is bent inwards at a third connecting end A (430), the first support body (410) is provided with a first protruding portion (414) which is bent outwards at a third connecting end A (413), the first protruding portion (414) and the first bend (211) are connected, and the first protruding portion (414) is supported above the first bend (211).

31. A seat back according to claim 26, wherein: the first support (410) is integrally formed with the first back support side (110).

32. A seat back according to claim 26, wherein: the first support body (410) and the first support frame side portion (210) are in detachable fixed connection or rotary connection.

33. A seat back according to claim 32, wherein: the first support body (410) is provided with a first connecting lug (415), the first support frame side portion (210) is provided with a first connecting groove (212) in plug-in connection with the first connecting lug (415), and the first connecting lug (415) is inserted into the first connecting groove (212) and is locked through a screw to achieve connection between the first support body (410) and the first support frame side portion (210).

34. A seat back according to claim 33, wherein: the plane of the first connecting lug (415) and the plane of the first connecting groove (212) are both perpendicular to the curved surface of the lumbar support part (140) of the back support.

35. A seat back according to claim 26, wherein: the third connection end A (413) is located diagonally inward and rearward of the back support (100).

36. A seat back according to claim 1, wherein: said back support (100) further comprising a back support lower portion (160); the first (110), upper (130), second (120) and lower (160) edges of the back support are connected in series to form a back support frame, which is substantially rigid and in which a flexible mesh structure (600) is provided.

37. A seat back according to claim 1, wherein: said back support (100) further comprising a back support lower portion (160); the first back support side (110), the upper back support (130), the second back support side (120) and the lower back support (160) are connected in series to form a back support frame, the back support frame is substantially flexible, and a flexible mesh structure (600) is arranged in the back support frame.

38. A seat back according to claim 37, wherein: the back support frame is less flexible than the mesh structure (600).

39. A backrest, characterized in that: comprising the seat back according to any one of claims 1 to 38, wherein the resilient member (300) is integrally formed with the upper back support portion (130).

40. A novel backrest is characterized in that: comprising a seat back according to any one of claims 1 to 38, wherein the elastic element (300) is connected to the upper back support part (130) by means of a detachable fixed connection.

41. A seat, characterized by: comprising a seat (700) and a seat back or backrest or new backrest according to any of claims 1 to 40, the lower part of the first support frame side (110) and the lower part of the second support frame side (120) being fixedly connected to the seat (700).

Technical Field

The invention belongs to the technical field of furniture equipment, and particularly relates to a seat backrest and a seat.

Background

The flexibility of seat back on the existing market, the travelling comfort is relatively poor, can not take place corresponding change according to user's position of sitting, the user of being not convenient for side talk, get action such as thing, also can arouse back fatigue often after the user sits for a long time, the seat is as the conventional article, especially office chair that office workers commonly used, how effectively alleviate back fatigue and pressure after the user sits for a long time, improve the travelling comfort of seat back, be one of the strong demands of existing market to seat product optimization, above-mentioned technical problem is waited for and is solved urgently.

US6709060 discloses a seat back for increasing back support, stability and comfort, which comprises a back and a support frame arranged at the back side of the back, a plurality of connecting blocks are arranged between the back and the support frame, but the connecting blocks are all in a rod-shaped structure and are respectively distributed at three positions of the upper side, the left side and the right side of the support frame to form point type support, the distance between the supporting points is relatively dispersed, meanwhile, the supporting points are far away from the outer edge of the back, the support strength is poor, if the seat back is applied to a backrest with large deformation and softness, the deformation space and softness are also small, the comfort is still poor, the seat back does not meet the requirements of ergonomics, the whole back is close to rigidity and does not deform stress, the seat back has poor adaptability to people with different body types, in addition, spare and accessory parts are too many, the production and installation are inconvenient, and the seat back has a large improvement.

In order to overcome the defects in the prior art, the invention provides the seat back and the seat which can be changed according to the change of the body sitting posture of a user, have high degree of freedom of deformation and strong support property and have the advantages of flexibility, comfort and the like.

Disclosure of Invention

In order to solve the above-mentioned problems, an object of the present invention is to provide a seat back and a seat that can be changed according to the change of the user's body posture, have high degree of freedom of deformation and strong support, and have the advantages of flexibility, comfort, etc.

In order to achieve the purpose, the invention adopts the following technical scheme:

a seat back, comprising:

a back support having a first back support side, a second back support side, a back support upper portion, a back support lumbar portion;

a support frame to support the back support, the support frame being substantially rigid and having a first support frame side, a second support frame side, and a support frame upper;

at least 3 elastic members, the elastic members are transversely arranged in a row and are respectively connected between the upper part of the back support member and the upper part of the support frame, each elastic member comprises a front connecting part connected with the upper part of the back support member, a rear connecting part connected with the upper part of the support frame and a bending part connected between the front connecting part and the rear connecting part, and the elastic members can be bent and deformed when being stressed;

a first support that is substantially rigid and disposed between the first back support side and the first support frame side.

The back support comprises a back support, a support frame made of rigid materials and used for supporting the back support, a row of elastic parts connected between the upper part of the back support and the upper part of the support frame, and a first support body connected between the side part of the first back support and the side part of the first support frame, wherein the shape of a bending part can be a bending shape or a straight plate shape or both the bending shape and the straight plate shape; when a user sits on the seat in different sitting postures, different pressures can be brought to the back supporting piece, the back supporting piece is correspondingly deformed and changed in angle inclination due to the bending deformation of the elastic piece, the wrapping feeling is strong, the comfortableness is better, the fatigue is effectively relieved, meanwhile, the first supporting body and the supporting frame can prevent the back supporting piece from excessively deforming and inclining, and the risk of toppling is avoided; the elastic pieces are transversely arranged in a row, so that the stability of the left side and the right side of the back supporting piece during deformation is ensured, the firmness of the elastic pieces is also ensured, the risk of backward tilting is avoided, and the backward tilting supporting force is increased; furthermore, the elastic piece is arranged at the upper part of the backrest, but not arranged at the left side and the right side of the back support piece, so that the left side and the right side of the back support piece have no resistance, the deformation degree of freedom of the back support piece is very high, the front-back deformation amplitude of the edges of the left side and the right side of the back support piece is larger, the sitting posture transformation of a user in the left-right direction is facilitated, such as the actions of side body conversation, fetching and the like, meanwhile, the support performance of the back support piece part close to the shoulder of the user is stronger, the excessive backward tilting of the part above the waist of the user is avoided, the backward tilting danger is not easy to occur, the stability and the support performance of; the support frame is approximately rigid, namely the support frame has higher rigidity and plays a supporting role or is directly rigid, and the deformation of the support frame is small or does not deform when a human body leans against the backrest and then conducts pressure to the support frame to generate pressure; the term "the first support body is substantially rigid" means that the first support body has a high degree of rigidity to support or is directly rigid, and the first support body has a small deformation amount or does not deform when a human body leans against the backrest and then conducts pressure to the first support body to generate pressure.

Preferably, the back support further comprises a second support body arranged symmetrically to the first support body, which is substantially rigid and arranged between the second back support side and the second support frame side.

The second support body and the first support body are symmetrically arranged along the vertical center line of the backrest, so that the stability of the backrest support is enhanced.

Preferably, the number of the elastic members is greater than or equal to 5, and the interval between the elastic members is uniformly arranged between the upper portion of the back support and the upper portion of the support frame.

The setting is greater than 5 even elastic component in interval, can further avoid bringing the danger of heeling, increases the holding power when leaning on the user.

Preferably, the elastic piece and the upper part of the support frame are fixedly connected in a detachable mode.

The elastic part and the support frame are made of different materials, the elastic part is made of flexible materials, the support frame is made of rigid materials, the detachable fixed connection mode is more convenient, and meanwhile, the die sinking cost is reduced, and the die sinking device is convenient to disassemble, assemble, maintain, transport and store.

Preferably, the first support is integrally formed with the first back support side.

The overall firmness between the first supporting body and the side part of the first back supporting piece is improved, and the service life is prolonged; when a human body sits on the seat to indirectly generate pressure on the first supporting body, the first supporting body basically does not deform or deforms a little, so that the overall stability and safety of the back supporting piece are ensured, and correspondingly, the second supporting body and the side part of the second back supporting piece are integrally formed; the first support body has higher rigidity degree to play a supporting role or is directly rigid, and when a human body leans against the backrest and conducts pressure to the first support body to generate pressure, the deformation of the first support body is small or is not deformed; in addition, first supporter and first back support lateral part can adopt the flexible material integrated into one piece of toughening, thereby first supporter can compare first back support lateral part thick and strong difficult emergence deformation can, correspondingly, also integrated into one piece between second supporter and the second back support lateral part.

Preferably, the first support body and the side part of the first support frame are fixedly or rotatably connected in a detachable mode.

The first support body and the side part of the first support frame are made of different materials, the first support body is made of flexible materials, the support frame is made of rigid materials, the detachable connection mode is more convenient, and meanwhile, the die sinking cost is favorably reduced, and the disassembly, the assembly, the maintenance, the transportation and the storage are convenient; the connection mode comprises a fixed connection mode or a rotary connection mode, the connection strength of the first support body and the side part of the first support frame can be guaranteed, and correspondingly, the detachable fixed connection or the rotary connection mode is also adopted between the second support body and the side part of the second support frame.

Preferably, the elastic members are parallel to each other, and the longitudinal section of each elastic member is in any one or any combination of a straight shape, a Y shape, an L shape, a T shape, a V shape and a Z shape.

The elastic piece is flat as a whole, so that the bending deformation of the elastic piece is facilitated, the deformation amount is large, and the deformation effect of the back support piece is better; particularly, the L-shaped, T-shaped, V-shaped, Y-shaped and Z-shaped shapes are adopted, and the reinforcing parts at the connecting positions among the elastic piece, the back supporting piece and the supporting frame are embodied.

Preferably, the elastic part is a straight elastic wing strip, the width of the elastic wing strip is 0.8-2 cm, and the length of the elastic wing strip is 2.5-5 cm.

The width setting is favorable for simultaneously ensuring the strength and deformation of the elastic piece.

Preferably, a reinforced part is arranged at the joint between the front connecting part of the elastic part and the upper part of the back support part, and the reinforced part and the elastic part are integrally molded by adopting a toughened flexible material.

Due to the high frequency of the bending change of the elastic piece, the single thin elastic piece is easy to break, the service life is short, the design of the reinforcing part can effectively enhance the connection strength between the elastic piece and the upper part of the back supporting piece, the integral firmness of the back supporting piece is further improved, and the service life is prolonged.

Preferably, the front connecting part, the bending part and the rear connecting part of the elastic piece are integrally molded by adopting toughened flexible materials.

The integral forming ensures the integral firmness degree and the service life of the elastic piece.

Preferably, the front connecting part and the bending part of the elastic part and the rear connecting part and the bending part of the elastic part are fixedly connected in a detachable mode.

The detachable fixed connection mode is convenient for the maintenance and the replacement of parts.

Preferably, the front connecting part of the elastic member is located at a higher level than the rear connecting part.

The elastic piece is beneficial to bending deformation.

Preferably, when the elastic member is in a free state, an included angle between the elastic member and a horizontal plane is 30-80 degrees.

The elastic piece is beneficial to bending deformation, the deformation amplitude is large, and the comfort is better.

Preferably, the support frame is positioned at the rear side of the back support, the support frame comprises a first upright post, a second upright post and a support frame top cross bar positioned at the upper edge of the support frame, and the back support comprises a back support top cross bar positioned at the upper edge of the back support; the front connecting part of the elastic part is connected to the top cross rod of the back support part, and the rear connecting part of the elastic part is connected to the top cross rod of the support frame.

The elastic part is connected between the cross bar at the top of the back support part at the upper edge of the back support part and the cross bar at the top of the support frame at the upper edge of the support frame, so that the deformation freedom of the left side and the right side of the back support part is higher, and meanwhile, the back support part close to the shoulders of a user has stronger support performance and is not easy to have the risk of backward tilting; wherein the first upright post is a side part of the first support frame, and the second upright post is a side part of the second support frame.

Preferably, the first upright column, the cross rod at the top of the support frame and the second upright column are sequentially connected to form a U shape.

The supporting frame structure of U type form can support back support piece's coverage is wider, and the support effect is better, and the security is higher.

Preferably, the support frame further comprises a support frame bottom cross rod, and the first stand column, the support frame top cross rod, the second stand column and the support frame bottom cross rod are sequentially connected to form a closed support frame.

Not only can make the coverage of supporting back support piece wider, can strengthen the firm degree of support frame body simultaneously.

Preferably, the upper part of the support frame is provided with a notch, and the rear connecting part of the elastic element is inserted into the notch to realize the plug-in connection between the upper part of the support frame and the elastic element.

The plug-in connection mode is adopted, the structure is simple, the number of parts is small, assembly is facilitated, and installation cost is reduced.

Preferably, the rear connecting part of the elastic part is provided with a fixing protrusion, the support frame comprises a support frame main body and a support frame splicing part spliced on the support frame main body, a first groove and a second groove used for containing the fixing protrusion are formed in the support frame main body and the support frame splicing part respectively, the fixing protrusion is contained in the first groove and the second groove, and the elastic part is fixedly connected to the upper part of the support frame after the support frame main body and the support frame splicing part are spliced.

The elastic piece and the support frame are fixedly connected in an inserting mode of the fixing protrusion, the first groove and the second groove, the structure is simple, parts are few, assembly is facilitated, and installation cost is reduced; wherein the splicing of the support frame main body and the support frame splicing piece realizes the splicing of the first groove and the second groove.

Preferably, the support frame main body is provided with a plurality of insertion grooves, and the support frame splicing pieces are provided with a plurality of insertion tongues; the splicing tongue is inserted into the splicing groove to realize splicing connection between the support frame main body and the support frame splicing piece, and then the screw is locked, and the screw is externally connected with a decorating piece for covering the screw.

Similarly, splicing is realized by adopting a splicing connection mode, the structure is simple, parts are few, assembly is facilitated, and the installation cost is reduced; the firmness of connection between the support frame main body and the support frame splicing piece is further guaranteed through the screw parts, and the appearance of the support frame is attractive and concise due to the decorating part.

Preferably, the fixing protrusion is provided at both side surfaces at one end of the elastic member.

The firmness and the stability of the connection of the two are ensured.

Preferably, a gap of 2cm to 6cm is left between the first back support side part and the first support frame side part, and the first support body is connected to the gap at the position of the lumbar support part of the back support.

Providing space for deformation of the back support, the first back support side, and the second back support side; correspondingly, a gap is reserved between the side part of the second back support and the side part of the second support frame, and the second support body is connected in the gap at the waist rest part of the back support.

Preferably, the first supporting body is of an arch-shaped hollow structure or a triangular-like hollow structure, a first connecting end a and a second connecting end a which are spaced up and down are formed at the connecting position of the first supporting body and the side part of the first back supporting body, and a third connecting end a is formed at the connecting position of the first supporting body and the side part of the first supporting frame.

The space is provided for deformation of the first back support piece side part and the second back support piece side part between the first connecting end A and the second connecting end A, a buffering area is formed, comfort is higher, meanwhile, the connection of the three connecting points of the first connecting end A, the second connecting end A and the third connecting end A forms an arch-shaped hollow structure or a triangular hollow structure, a triangular structure is basically formed, supporting strength is better compared with that of common point type supporting, and better rigid supporting is provided for the first back support piece side part and the second back support piece side part.

Preferably, the back support further comprises a back support lower portion; the first back support side edge, the back support upper edge, the second back support side edge and the back support lower edge are sequentially connected and closed to form a back support frame, the back support frame is approximately rigid, and a flexible net structure is arranged in the back support frame.

The back support piece frame is approximately rigid, namely the back support piece frame is small in deformation or basically does not deform, and the net-shaped structure comprises net cloth or an elastic hollow structure, so that the back support piece is larger in deformation, large in elasticity, stronger in wrapping feeling and more comfortable; particularly, the mesh-shaped area can be arranged in a plurality of rhombic hollow structures, particularly the height of the rhombuses is larger than the width of the rhombuses, so that the deformation amount of the back support piece in the left and right directions and the overall wrapping feeling of the back support piece are further improved, and meanwhile, the rhombuses on the upper part of the mesh-shaped area are larger than the rhombuses on the lower part of the mesh-shaped area, so that the support for the waist is facilitated.

Preferably, the back support further comprises a back support lower portion; the first back support side edge, the back support upper edge, the second back support side edge and the back support lower edge are sequentially connected and closed to form a back support frame, the back support frame is approximately flexible, and a flexible net structure is arranged in the back support frame.

The back support frame is approximately flexible, namely the back support frame has a certain deformation, so that the wrapping feeling is stronger, and the comfort is better; meanwhile, the net-shaped structure comprises mesh cloth or an elastic hollow structure, so that the back support piece has larger deformation, large elasticity, stronger wrapping feeling and higher comfort; particularly, the mesh-shaped area can be arranged in a plurality of rhombic hollow structures, particularly the height of the rhombuses is larger than the width of the rhombuses, so that the deformation amount of the back support piece in the left and right directions and the overall wrapping feeling of the back support piece are further improved, and meanwhile, the rhombuses on the upper part of the mesh-shaped area are larger than the rhombuses on the lower part of the mesh-shaped area, so that the support for the waist is facilitated.

Preferably, the back support frame is less flexible than the mesh structure.

Both guaranteed the support function of back support piece frame, can produce its self certain deformation again simultaneously, the parcel feels better.

A seat back, comprising:

a back support having a first back support side, a second back support side, a back support upper portion, a back support lumbar portion;

a support frame to support the back support, the support frame being substantially rigid and having a first support frame side, a second support frame side, and a support frame upper;

the elastic pieces are transversely arranged in a row and are respectively connected between the upper part of the back support piece and the upper part of the support frame, each elastic piece comprises a front connecting part connected with the upper part of the back support piece, a rear connecting part connected with the upper part of the support frame and a bending part connected between the front connecting part and the rear connecting part, and the elastic pieces can be bent and deformed when being stressed;

a first support that is substantially rigid and disposed between the first back support side and the first support frame side; the first supporting body is of an arch-shaped hollow structure or a triangular-like hollow structure, a first connecting end A and a second connecting end A are formed at the connecting position of the first supporting body and the side part of the first back supporting body, and a third connecting end A is formed at the connecting position of the first supporting body and the side part of the first supporting frame.

According to the invention, when a user sits on the seat in different sitting postures, different pressures can be brought to the back supporting piece, the back supporting piece is correspondingly deformed and changed in angle inclination due to the bending deformation of the elastic piece, the wrapping feeling is strong, the comfort is better, and the fatigue is effectively relieved; meanwhile, the first supporting body and the supporting frame can prevent the excessive deformation and inclination of the back supporting piece, so that the falling danger is avoided, in addition, the plurality of elastic pieces are transversely arranged in a row, the stability of the left side and the right side of the back supporting piece during deformation is ensured, and the backward inclining supporting force is also increased; the elastic part is arranged at the upper part of the backrest, so that the left side and the right side of the back support part have no resistance and high deformation freedom degree, the sitting posture change of a user in the left and right directions is facilitated, meanwhile, the support of the back support part close to the shoulders of the user is stronger, and the longitudinal stability and the support of the spine of the user are enhanced; first supporter is the hollow out construction of arch shape or is class triangle-shaped hollow out construction, be first link A promptly, first back support piece lateral part between the second link A, second back support piece lateral part takes place to deform and provides the space, form the buffer area, the travelling comfort is more, hollow out construction has formed triangle-shaped's structure basically simultaneously, it is better to compare in its support intensity of common point type support, for first back support piece lateral part, second back support piece lateral part provides better rigid support, the too big deformation of back support piece on the left and right sides has been avoided, back support piece's stability has been guaranteed, safety, the supporting role of back support piece waist back. The shape of the bending part can be a bending shape or a straight plate shape, and the bending part can be bent and deformed only when pressure is generated on the elastic part; in addition, the support frame is substantially rigid, which means that the support frame has a high degree of rigidity to play a supporting role or is directly rigid, and when a human body leans against the backrest and conducts pressure to the support frame to generate pressure, the deformation of the support frame is small or does not deform; the term "the first support body is substantially rigid" means that the first support body has a high degree of rigidity to support or is directly rigid, and the first support body has a small deformation amount or does not deform when a human body leans against the backrest and then conducts pressure to the first support body to generate pressure.

Preferably, the back support further comprises a second support body arranged symmetrically to the first support body, which is substantially rigid and arranged between the second back support side and the second support frame side.

The second support body and the first support body are symmetrically arranged along the vertical center line of the backrest, so that the stability of the backrest support is enhanced.

Preferably, the first back support side part at least comprises a first softer back support and a first harder waist support in sequence from top to bottom, wherein the first waist support is positioned between the first connecting end a and the second connecting end a, and the first waist support does not deform or has a deformation amount lower than that of the first back support when being squeezed by external force.

Since the first lumbar side support is used to support the user's lumbar region, the first lumbar side support needs to have a lower amount of deformation than the first back side support, which effectively relaxes the user's lumbar region and is more comfortable, and correspondingly, the second lumbar side support does not deform or has a lower amount of deformation than the second back side support.

Preferably, the first back support side part at least comprises a first back support and a first waist support from top to bottom in sequence, wherein the first waist support is positioned between the first connecting end a and the second connecting end a; the first back side support and the first waist side support are rigid, and do not deform when being squeezed by external force.

Preferably, the first support frame side part is formed with a first bend bending inwards at the third connecting end a, the first support body is formed with a first convex part bending outwards at the third connecting end a, the first convex part and the first bend are connected with each other, and the first convex part is supported above the first bend.

Because first bending is bent to first waist side support, it is opposite with the pressure that the user leaned on backward, consequently embody the supporting role of support frame, first supporter to back support better, simultaneously, first bulge bearing has further embodied first support frame lateral part and has provided the holding power for back support piece in first bending top, has also guaranteed the fastness of connection between first bulge and the first bending, has also improved the stability behind the backward pressure testing of back support piece.

Preferably, the first support is integrally formed with the first back support side.

The overall firmness between the first supporting body and the side part of the first back supporting piece is improved, and the service life is prolonged; when a human body sits on the seat to indirectly generate pressure on the first supporting body, the first supporting body basically does not deform, so that the side part of the first back supporting piece and the back supporting piece are not excessively deformed, the integral stability and safety of the back supporting piece are ensured, and correspondingly, the second supporting body and the side part of the second back supporting piece are integrally formed; the degree of rigidity is higher to play a supporting role or the rigidity is direct, and when a human body leans against the backrest and conducts pressure to the first supporting body to generate pressure, the deformation of the first supporting body is small or is not deformed; in addition, first supporter and first back support lateral part can adopt the flexible material integrated into one piece of toughening, thereby first supporter can compare first back support lateral part thick and strong difficult emergence deformation can, correspondingly, also integrated into one piece between second supporter and the second back support lateral part.

Preferably, the first support body and the side part of the first support frame are fixedly or rotatably connected in a detachable mode.

The detachable fixed connection mode is adopted among different materials, so that the die sinking cost is reduced, and the disassembly, assembly, maintenance, transportation and storage are facilitated; correspondingly, the second support body and the side part of the second back support member adopt a detachable fixed connection or a rotatable connection mode.

Preferably, the first support body is provided with a first connecting lug, the side part of the first support frame is provided with a first connecting groove in inserted connection with the first connecting lug, and the first connecting lug is inserted into the first connecting groove and locked by a screw to realize connection between the first support body and the side part of the first support frame.

The connection mode of inserting connection and locking by screws is firmer, and the service life is prolonged.

Preferably, the plane where the first connecting lug is located and the plane where the first connecting groove is located are perpendicular to the curved surface where the lumbar support part of the back support is located.

When a user leans on the back support, the pressure applied to the back support is transmitted to the first connecting lug, the corresponding second connecting lug, the first connecting groove and the corresponding second connecting groove, and the pressure applied to the back support, namely the force applied to the side part of the first support frame and the side part of the second support frame, belongs to the stress in the vertical direction, so that the stress is more stable.

Preferably, the third connecting end a is located diagonally inward and rearward of the back support.

The back support piece is guaranteed not to be blocked when being deformed in the left and right sides.

Preferably, the back support further comprises a back support lower portion; the first back support side edge, the back support upper edge, the second back support side edge and the back support lower edge are sequentially connected and closed to form a back support frame, the back support frame is approximately rigid, and a flexible net structure is arranged in the back support frame.

The back support piece frame is approximately rigid, namely the back support piece frame is small in deformation or basically does not deform, and the net-shaped structure comprises net cloth or an elastic hollow structure, so that the back support piece is larger in deformation, large in elasticity, stronger in wrapping feeling and more comfortable; particularly, the mesh-shaped area can be arranged in a plurality of rhombic hollow structures, particularly the height of the rhombuses is larger than the width of the rhombuses, so that the deformation amount of the back support piece in the left and right directions and the overall wrapping feeling of the back support piece are further improved, and meanwhile, the rhombuses on the upper part of the mesh-shaped area are larger than the rhombuses on the lower part of the mesh-shaped area, so that the support for the waist is facilitated.

Preferably, the back support further comprises a back support lower portion; the first back support side edge, the back support upper edge, the second back support side edge and the back support lower edge are sequentially connected and closed to form a back support frame, the back support frame is approximately flexible, and a flexible net structure is arranged in the back support frame.

The back support frame is approximately flexible, namely the back support frame has a certain deformation, so that the wrapping feeling is stronger, and the comfort is better; meanwhile, the net-shaped structure comprises mesh cloth or an elastic hollow structure, so that the back support piece has larger deformation, large elasticity, stronger wrapping feeling and higher comfort; particularly, the mesh-shaped area can be arranged in a plurality of rhombic hollow structures, particularly the height of the rhombuses is larger than the width of the rhombuses, so that the deformation amount of the back support piece in the left and right directions and the overall wrapping feeling of the back support piece are further improved, and meanwhile, the rhombuses on the upper part of the mesh-shaped area are larger than the rhombuses on the lower part of the mesh-shaped area, so that the support for the waist is facilitated.

Preferably, the back support frame is less flexible than the mesh structure.

Both guaranteed the support function of back support piece frame, can produce its self certain deformation again simultaneously, the parcel feels better.

A backrest comprises the seat backrest, and the elastic piece and the upper part of the back support piece are integrally formed.

The overall firmness of the elastic piece and the back support piece is improved, and the service life is prolonged.

A novel backrest comprises the seat backrest, wherein the elastic piece and the upper part of the back supporting piece are connected in a detachable fixed connection mode.

The detachable fixed connection mode is more convenient, and the mold opening cost is reduced, and the disassembly, assembly, maintenance, transportation and storage are convenient.

A seat comprises a seat part and the seat backrest or the novel backrest, wherein the lower part of the side part of the first support frame and the lower part of the side part of the second support frame are fixedly connected with the seat part.

The supporting function of the supporting frame to the back supporting piece is ensured.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a seat back and a seat, which can change according to the change of the sitting posture of the body of a user, have high deformation freedom degree and strong support property and have the advantages of flexibility, comfort and the like. The invention comprises a back support, a support frame made of rigid material for supporting the back support, a row of elastic parts connected between the upper part of the back support and the upper part of the support frame, and a first support body connected between the side part of the first back support and the side part of the first support frame; when the user adopts different position of sitting to sit on the seat, can bring different pressure for back support piece, back support piece takes place deformation and angle slope change correspondingly because the bending deformation of elastic component, and the parcel is felt strong, and the travelling comfort is better, effectively alleviates fatigue, and simultaneously, first supporter and support frame can prevent back support piece's excessive deformation and slope, avoid bringing the danger of empting.

Meanwhile, the plurality of elastic pieces are transversely arranged in a row, so that the stability of the left side and the right side of the back supporting piece during deformation is ensured, the firmness of the elastic pieces is also ensured, the backward tilting danger can be avoided, and the backward tilting supporting force is increased; furthermore, the elastic piece is arranged on the upper part of the backrest, but not arranged on the left side and the right side of the back support piece, so that the left side and the right side of the back support piece have no resistance, the deformation degree of freedom of the back support piece is very high, the front-back deformation range of the edges of the left side and the right side of the back support piece is larger, the sitting posture change of a user in the left-right direction is facilitated, such as the actions of side body conversation, fetching and the like, meanwhile, the support performance of the back support piece part close to the shoulder of the user is stronger, the excessive backward tilting of the part above the waist of the user is avoided, the backward tilting danger is not easy to occur, the stability and the support performance of.

In addition, first link A, second link A, the connection of the three tie point of third link A forms the hollow out construction of arch shape or is a triangle-shaped hollow out construction, for first back support piece lateral part, the deformation takes place for the second back support piece lateral part provides the space, form the buffering area, the travelling comfort is more, and simultaneously, triangle-shaped's structure has been formed basically, it is better to compare in its support intensity of common point type support, for first back support piece lateral part, second back support piece lateral part provides better rigid support, the too big deformation of back support piece on the left and right sides has been avoided, back support piece's stability has been guaranteed, safety, the supporting role of back support piece lumbar support portion.

Drawings

Fig. 1 is a schematic structural view of a seat back and a seat according to embodiments 1 and 2;

FIG. 2 is another schematic view of the seat back and seat of embodiments 1 and 2;

FIG. 3 is a rear view schematic diagram of the seat back and the seat according to embodiments 1 and 2;

FIG. 4 is a schematic side view of the seat back and seat of embodiments 1 and 2;

FIG. 5 is an enlarged view of portion A of FIG. 4;

FIG. 6 is a schematic structural view of the back support, the elastic member, the first support and the second support integrally formed in accordance with example 1;

FIG. 7 is an enlarged view of the portion B of FIG. 6;

FIG. 8 is a schematic structural view of a main body of a stand according to embodiment 1;

FIG. 9 is an enlarged view of the portion C of FIG. 8;

FIG. 10 is a schematic view of the construction of a splicing part of the support frame of example 1;

FIG. 11 is an enlarged view of the portion D of FIG. 10;

FIG. 12 is a schematic structural diagram of the split joint of the support frame body and the support frame splicing piece of the support frame in the embodiment 1;

FIG. 13 is an enlarged view of section E of FIG. 12;

FIG. 14 is a schematic top view of the back support according to embodiment 1.

Detailed Description

The following describes a detailed embodiment of the present invention with reference to the accompanying drawings.

The present embodiment relates to reference orientations of components such as a rear side, an upper portion, a lower portion, and the like, which are described in a normal use state in which a user is seated on a seat.