CN-224206485-U - Backrest of seat and seat

Abstract

The utility model discloses a backrest of a seat and the seat, wherein the backrest of the seat comprises a backrest support and a backrest outer frame positioned at the front side of the backrest support, the backrest outer frame comprises a top connecting beam, a bottom connecting beam and two supporting vertical beams, the tops of the two supporting vertical beams are respectively connected with two ends of the top connecting beam, the bottoms of the two supporting vertical beams are respectively connected with two ends of the bottom connecting beam, the top connecting beam and the bottom connecting beam are connected with the backrest support, flexible supporting pieces are arranged in a space surrounded by the top connecting beam, the bottom connecting beam and the two supporting vertical beams, the supporting vertical beams comprise a plurality of rigid blocks arranged along the extending direction of the supporting vertical beams, and the adjacent rigid blocks are connected through elastic connecting parts. The utility model can generate corresponding deformation to adapt to the back shape of the user when aiming at the users with different sitting postures and different body types, thereby improving the comfort of the seat.

Inventors

• FENG XIAOWEI
• Request for anonymity

Assignees

• 杭州黑白调科技有限公司

Dates

Publication Date

20260508

Application Date

20250626

Claims (10)

1. 1. The backrest of the chair is characterized by comprising a backrest bracket and a backrest outer frame positioned at the front side of the backrest bracket; The backrest outer frame comprises a top connecting beam, a bottom connecting beam and two supporting vertical beams, wherein the tops of the two supporting vertical beams are respectively connected to two ends of the top connecting beam, the bottoms of the two supporting vertical beams are respectively connected to two ends of the bottom connecting beam, the top connecting beam and the bottom connecting beam are connected with a backrest support, flexible supporting pieces are arranged in a space surrounded by the top connecting beam, the bottom connecting beam and the two supporting vertical beams, each supporting vertical beam comprises a plurality of rigid blocks arranged along the extending direction of the supporting vertical beam, and adjacent rigid blocks are connected through elastic connecting parts.
2. 2. The backrest of claim 1 in which the resilient connecting portion is externally wrapped with a flexible support block between adjacent rigid blocks, the upper and lower ends of the flexible support block respectively abutting against the adjacent rigid blocks.
3. 3. The seat back of claim 2, wherein the resilient connecting portion is sheet-like having a thickness and a width that are less than the thickness and width of the rigid block.
4. 4. A backrest of a chair according to claim 3, wherein the rigid block comprises a supporting wall, the two sides of the supporting wall are respectively provided with a forwardly extending reinforcing rib, the supporting wall and the end parts of the reinforcing ribs form supporting surfaces, the elastic connecting parts are connected to the supporting wall of the rigid block, and the two ends of the flexible supporting block are respectively propped against two opposite supporting surfaces in the two adjacent rigid blocks.
5. 5. The backrest of claim 4 in which the flexible support blocks are provided with forwardly projecting support ribs on each side thereof, the support ribs being sandwiched between the reinforcing ribs of adjacent rigid blocks.
6. 6. The seatback of claim 4 wherein the forward side of the support wall is provided with forwardly projecting connecting posts, and the side edges of the flexible support member are connected to the connecting posts.
7. 7. The backrest of claim 1 wherein the middle portion of the bottom connecting beam is pivotally connected to the backrest support by a transversely extending pivot, the ends of the top connecting beam are respectively connected to the backrest support by a connecting bracket, one end of the connecting bracket is fixed to the backrest support, and the other end of the connecting bracket is pivotally connected to the top connecting beam by a transversely extending pivot.
8. 8. The backrest of claim 7 wherein a connecting block is detachably fixed to the rear side of the middle portion of the bottom connecting beam, the rotating shaft is a first pair of locking screws traversing the connecting block and the bottom of the backrest support, connecting seats are respectively arranged on the rear sides of the two ends of the top connecting beam in a protruding mode, the connecting support is in a strip shape, one end of the connecting support is detachably fixed with the backrest support, and the pivot is a second pair of locking screws traversing the other end of the connecting support and the connecting seats.
9. 9. The backrest of claim 8 in which the connecting base has a slot and the other end of the connecting bracket has a forwardly projecting tab which is inserted into the slot, and a second pair of locking screws pivotally connecting the tab to the connecting base across the tab and the connecting base.
10. 10. A seat comprising a backrest of a seat as claimed in any one of claims 1 to 9.

Description

Backrest of seat and seat Technical Field The utility model relates to the technical field of seats, in particular to a backrest of a seat and the seat. Background The backrest of the traditional seat is of a rigid structure, the backrest cannot adapt to the shape of the back of a user, the backrest is difficult to provide better support for the back of the user, the existing office seat and the study seat usually support the back of the user by means of flexible components such as mesh cloth, shaped cotton and the like, although the backrest can adapt to the shape of the back of the user by means of the flexible support components, a rigid frame is required to be arranged on the periphery of the backrest so as to provide a connection basis for the flexible support components such as the mesh cloth, the shaped cotton and the like, the rigid frame cannot adapt to the change of sitting posture adaptability of the user, and the backrest cannot be well attached to users of different types, so that the comfort of the seat is poor. Disclosure of utility model The utility model aims to provide a backrest of a seat and the seat, which can be adaptively deformed according to different sitting postures and body postures of a user so as to improve the comfort of the seat. In order to achieve the above purpose, the utility model adopts the following technical scheme: the backrest of the seat comprises a backrest bracket and a backrest outer frame positioned at the front side of the backrest bracket; The backrest outer frame comprises a top connecting beam, a bottom connecting beam and two supporting vertical beams, wherein the tops of the two supporting vertical beams are respectively connected to two ends of the top connecting beam, the bottoms of the two supporting vertical beams are respectively connected to two ends of the bottom connecting beam, the top connecting beam and the bottom connecting beam are connected with a backrest support, flexible supporting pieces are arranged in a space surrounded by the top connecting beam, the bottom connecting beam and the two supporting vertical beams, each supporting vertical beam comprises a plurality of rigid blocks arranged along the extending direction of the supporting vertical beam, and adjacent rigid blocks are connected through elastic connecting parts. Preferably, the flexible supporting blocks are wrapped outside the elastic connecting parts and positioned between the two adjacent rigid blocks, and the upper ends and the lower ends of the flexible supporting blocks are respectively propped against the two adjacent rigid blocks. Preferably, the elastic connection portion is in the form of a sheet, and the thickness and width of the elastic connection portion are smaller than those of the rigid block. Preferably, the rigid block comprises a supporting wall, wherein the two sides of the supporting wall are respectively provided with a reinforcing convex rib extending forwards, the supporting wall and the end parts of the reinforcing convex ribs form a supporting surface, the elastic connecting part is connected to the supporting wall of the rigid block, and the two ends of the flexible supporting block are respectively propped against two opposite supporting surfaces in the two adjacent rigid blocks. Preferably, the two sides of the flexible supporting block are respectively provided with supporting ribs protruding forwards, and the supporting ribs are clamped between the reinforcing ribs of the two adjacent rigid blocks. Preferably, the front side of the support wall is provided with forwardly projecting connecting posts, and the side edges of the flexible support member are connected to the connecting posts. Preferably, the middle part of the bottom connecting beam is pivoted with the backrest bracket through a transversely extending rotating shaft, two ends of the top connecting beam are respectively connected with the backrest bracket through a connecting bracket, one end of the connecting bracket is fixed with the backrest bracket, and the other end of the connecting bracket is pivoted with the top connecting beam through a transversely extending pivot. Preferably, a connecting block is detachably fixed on the rear side of the middle part of the bottom connecting beam, the rotating shaft is a first pair of locking screws traversing the connecting block and the bottom of the backrest support, connecting seats are respectively arranged on the rear sides of the two ends of the top connecting beam in a protruding mode, the connecting support is long-strip-shaped, one end of the connecting support is detachably fixed with the backrest support, and the pivot is a second pair of locking screws traversing the other end of the connecting support and the connecting seats. Preferably, the connecting seat is provided with a slot, the other end of the connecting bracket is provided with a connecting lug protruding forwards, the connecting lug is inserted into the slot, and th