CN-224206484-U - Backrest assembly of seat and seat

Abstract

The utility model discloses a backrest component of a seat and the seat, the backrest component of the seat comprises a fixed support, a movable support, a backrest and a locking piece, wherein a guide part extending up and down is arranged on the fixed support, the movable support is slidably arranged on the guide part, the locking piece is arranged between the movable support and the fixed support, the locking piece is movably matched with the movable support to enable the locking piece to move relative to the movable support between a first position and a second position along the left-right direction, the backrest comprises a top cross beam and a bottom cross beam, the top cross beam is slidably arranged on the movable support, an elastic supporting piece is arranged between the top cross beam and the movable support, an elastic piece is arranged between the bottom cross beam and the movable support, the elastic piece gradually inclines upwards from front to back, and the upper end part of the elastic piece is fixedly connected to the movable support, and the lower end part of the elastic piece is fixedly connected to the bottom cross beam. According to the utility model, the backrest is floatingly arranged on the movable support, so that the backrest can adapt to different sitting postures of a user, and the comfort of the seat is improved.

Inventors

• FENG XIAOWEI
• Request for anonymity

Assignees

• 杭州黑白调科技有限公司

Dates

Publication Date

20260508

Application Date

20250630

Claims (10)

1. 1. The backrest component of the seat is characterized by comprising a fixed bracket, a movable bracket, a backrest and a locking piece; The movable support is slidably arranged on the guide part so that the movable support can move relative to the fixed support in the up-down direction, the locking piece is arranged between the movable support and the fixed support, the locking piece is movably matched with the movable support so that the locking piece can move relative to the movable support between a first position and a second position along the left-right direction, when the locking piece is positioned at the first position, the locking piece is clamped on the fixed support so as to lock the movable support and the fixed support together, and when the locking piece is positioned at the second position, the locking piece is separated from the fixed support so that the movable support has the freedom degree of movement relative to the fixed support in the up-down direction; the backrest comprises a top beam and a bottom beam, wherein the top beam is slidably arranged on a movable support so that the top beam can move relative to the movable support in the front-rear direction, an elastic support piece is arranged between the top beam and the movable support and is used for applying forward elastic stress to the top beam, an elastic sheet is arranged between the bottom beam and the movable support and gradually inclines upwards from front to rear, and the upper end part of the elastic sheet is fixedly connected to the movable support and the lower end part of the elastic sheet is fixedly connected to the bottom beam.
2. 2. The backrest assembly of claim 1 in which the elastic sheet includes a first connecting portion extending upward from an upper end portion thereof, a second connecting portion extending downward from a lower end portion thereof, the first connecting portion being fixed to the movable bracket by a bolt, the second connecting portion being fixed to the bottom cross member by a bolt, and the thickness of the elastic sheet gradually increasing from a middle portion thereof toward both ends thereof.
3. 3. The backrest assembly of claim 1, wherein the movable bracket is provided with two guide posts staggered in the left-right direction, the extending direction of the guide posts is consistent with the front-back direction, the top cross beam is fixedly provided with two guide sleeves, and the two guide sleeves are respectively sleeved on the two guide posts in a sliding manner.
4. 4. A seat back assembly in accordance with claim 3 wherein the resilient support is a spring mounted over the guide post, the guide post being provided with a stepped surface, the spring being mounted with its ends against the stepped surface and the rear end surface of the guide sleeve, respectively.
5. 5. The seat back assembly of claim 4 wherein the guide post is provided with a guide hole extending rearward from a front end surface thereof, and the guide sleeve is internally provided with a guide post slidably received in the guide hole.
6. 6. The backrest module of claim 1 in which the fixed bracket includes a fixed seat, a fixed plate disposed on a front side of the fixed seat, the fixed plate being detachably fixedly coupled to the fixed seat, the guide portion includes two guide grooves disposed on the fixed plate and extending in an up-down direction, two sliding blocks disposed on a rear side of the movable bracket, the sliding blocks being respectively slidably inserted into the two guide grooves, a stopper detachably fixed to the sliding blocks disposed on a rear side of the fixed plate, and the fixed plate being defined between the stopper and the movable bracket.
7. 7. The backrest module of claim 1 in which the fixed bracket is provided with a vertically extending channel, the channel includes a first side wall and a second side wall opposite the first side wall, the first side wall is provided with a plurality of detent grooves arranged in a vertical direction, the movable bracket is provided with a mounting groove, the locking member is embedded in the mounting groove and configured to swing between a first position and a second position within the mounting groove, the locking member is provided with a locking post protruding from the mounting groove and extending into the channel, the locking post is locked in one of the detent grooves when the locking member is in the first position, the locking post is disengaged from the detent groove and is positioned in the channel when the locking member is in the second position, and an elastic member is provided between the movable bracket and the locking member for applying an elastic stress to the locking member so as to maintain the tendency of the locking member to swing toward the first position at all times.
8. 8. The seatback assembly of claim 7 wherein the upper end surface of the mounting groove is provided with a first concave portion recessed upwardly, the lower end surface of the mounting groove is provided with a second concave portion recessed downwardly, the locking member includes a rotating end at an upper end thereof and a locking end at a lower end thereof, the rotating end is embedded in the first concave portion and configured to rotate in the first concave portion to enable the locking member to swing between the first position and the second position, the guide groove includes an upper end surface and a lower end surface, a portion of the guide groove between the uppermost detent groove and the upper end surface forms a guide portion for defining the guide portion when the locking member slides to the guide portion to retain the locking member in the second position, the upper end surface is for engaging the locking member in the second concave portion, the lower end surface is for engaging the locking member in the locking member upward to enable the locking end of the locking member to disengage from the second concave portion, the guide groove includes a side wall extending from the first side wall of the guide groove toward the second side wall in a direction of the guide groove toward the second side wall, and a side wall extending from the uppermost detent groove toward the second side wall in a direction toward the second side wall of the guide groove, and the side wall extending toward the side wall toward the upper side wall toward the second side.
9. 9. The seat back assembly of claim 8, wherein a cover is detachably secured to the movable bracket, the cover covering the outside of the mounting slot, the cover having a through hole for the locking post to pass therethrough.
10. 10. A seat comprising a backrest assembly of a seat as claimed in any one of claims 1 to 9.

Description

Backrest assembly of seat and seat Technical Field The utility model relates to the technical field of seats, in particular to a backrest assembly of a seat and the seat. Background In order to enable the backrest to better fit the back of a user, the conventional office chair and the electronic racing chair are usually manufactured according to ergonomics, wherein the supporting surface of the backrest is in a curved surface shape which is more consistent with the back of a human body, and the backrest can better support the back of the user when the user keeps a correct sitting posture, but when the user slightly changes the sitting posture, the backrest fixed on the backrest bracket is difficult to adapt to the change of the sitting posture of the user, so that the comfort of the chair is greatly reduced. Disclosure of utility model The utility model aims to provide a backrest assembly of a seat and the seat, which can adapt to the change of sitting postures of users and improve the comfort of the seat. In order to achieve the above purpose, the utility model adopts the following technical scheme: The backrest component of the seat comprises a fixed bracket, a movable bracket, a backrest and a locking piece; The movable support is slidably arranged on the guide part so that the movable support can move relative to the fixed support in the up-down direction, the locking piece is arranged between the movable support and the fixed support, the locking piece is movably matched with the movable support so that the locking piece can move relative to the movable support between a first position and a second position along the left-right direction, when the locking piece is positioned at the first position, the locking piece is clamped on the fixed support so as to lock the movable support and the fixed support together, and when the locking piece is positioned at the second position, the locking piece is separated from the fixed support so that the movable support has the freedom degree of movement relative to the fixed support in the up-down direction; the backrest comprises a top beam and a bottom beam, wherein the top beam is slidably arranged on a movable support so that the top beam can move relative to the movable support in the front-rear direction, an elastic support piece is arranged between the top beam and the movable support and is used for applying forward elastic stress to the top beam, an elastic sheet is arranged between the bottom beam and the movable support and gradually inclines upwards from front to rear, and the upper end part of the elastic sheet is fixedly connected to the movable support and the lower end part of the elastic sheet is fixedly connected to the bottom beam. Preferably, the elastic sheet comprises a first connecting part extending upwards from the upper end part of the elastic sheet and a second connecting part extending downwards from the lower end part of the elastic sheet, wherein the first connecting part is fixed on the movable bracket through a bolt, the second connecting part is fixed on the bottom cross beam through a bolt, and the thickness of the elastic sheet gradually increases from the middle part of the elastic sheet to the two ends of the elastic sheet. Preferably, two guide posts staggered in the left-right direction are arranged on the movable support, the extending direction of the guide posts is consistent with the front-back direction, two guide sleeves are fixed on the top cross beam, and the two guide sleeves are respectively sleeved on the two guide posts in a sliding manner. Preferably, the elastic support piece is a spring sleeved on the guide post, the guide post is provided with a step surface, and two ends of the spring are respectively propped against the step surface and the rear end surface of the guide sleeve. Preferably, the guide post is provided with a guide hole extending backwards from the front end surface of the guide post, and the guide sleeve is internally provided with a guide post which is slidably connected in the guide hole in a penetrating way. Preferably, the fixed support comprises a fixed seat and a fixed plate positioned on the front side of the fixed seat, the fixed plate is fixedly connected with the fixed seat in a detachable mode, the guide part comprises two guide grooves which are arranged on the fixed plate and extend along the up-down direction, two sliding blocks are arranged on the rear side of the movable support, the two sliding blocks are respectively and slidably embedded in the two guide grooves, a stop block detachably fixed on the sliding blocks is arranged on the rear side of the fixed plate, and the fixed plate is limited between the stop block and the movable support. The movable support is provided with a mounting groove, a locking piece is embedded in the mounting groove and is configured to swing between a first position and a second position in the mounting groove, a locking column protruding from the