CN220236463U - Back supporting mechanism for seat - Google Patents

Abstract

The utility model discloses a back supporting mechanism for a seat, which comprises a back supporting frame and a back, wherein the back supporting frame is hinged to the rear side of a seat plate of the seat, the back is connected with the back supporting frame through a connecting component, the connecting component comprises mounting seats which are symmetrically arranged on the back supporting frame left and right, connecting blocks which are symmetrically arranged on the back surface of the back, the connecting blocks are in one-to-one correspondence with the mounting seats, the connecting blocks are rotatably arranged on the corresponding mounting seats, the back is arranged on the connecting blocks in a sliding manner up and down, a first positioning structure is further arranged between the connecting blocks and the back, and when the back is adjusted to different heights, the first positioning structure is used for positioning the back on the connecting blocks. According to the utility model, the backrest can be positioned at positions with different heights of the backrest support frame by arranging the first positioning structure, so that the backrest support frame can be suitable for users with different heights.

Description

Back supporting mechanism for seat

Technical Field

The utility model relates to the field of seating, in particular to a back support mechanism for a seat.

Background

The back of the seat supports the back of the human body in a sitting posture state, so that the comfort level of the seat can be improved. In the prior art, most of the back rest of the seat is fixed at the rear end of the seat surface, and when a user is on the seat, the back rest is often required to be separated from the back rest, so that the back rest supporting effect of the seat is poor; the backrest of the seat back linkage seat is connected with the seat board through a linkage mechanism, and the height of the backrest is not easy to adjust and cannot adapt to people with different heights.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a back supporting mechanism for a seat, wherein a backrest in the back supporting mechanism can rotate and adjust the height, the backrest can rotate, the backrest can be better attached to the back of a user, the supporting effect is improved, and the backrest can adapt to users with different heights by adjusting the height of the backrest.

The technical scheme of the utility model is realized as follows:

the utility model provides a back supporting mechanism for seat, includes back support frame and back, back support frame articulates the rear side of seat, back support pass through coupling assembling with back support frame links to each other, coupling assembling includes bilateral symmetry setting up mount pad, bilateral symmetry setting on back support frame at the connecting block on back, connecting block and mount pad one-to-one, the connecting block rotates the setting on the mount pad that corresponds, back slide setting up from top to bottom on the connecting block, the connecting block with still be equipped with first location structure between the back, works as when back is adjusted to different co-altitude, first location structure is used for with back location on the connecting block.

In this scheme, when needing to adjust back height, pulling back makes its along the connecting block slip, then will lean on the back location here through first location structure to adapt to the user of different heights, different support demands, the connecting block rotates to set up on the mount pad, and the human body leans on to lean on and can sled back, realizes that the back rotates along with human back, and the guarantee user obtains better supporting experience.

Preferably, the back of the backrest is symmetrically provided with sliding grooves in left-right directions, the connecting blocks are provided with T-shaped positioning blocks, the sliding grooves are in one-to-one correspondence with the T-shaped positioning blocks, the T-shaped positioning blocks are arranged in the corresponding sliding grooves in a sliding mode, each T-shaped positioning block comprises a vertical portion and a horizontal portion, the bottom surface of each sliding groove is provided with a penetrating groove for the corresponding vertical portion to penetrate through in the vertical direction, and after the vertical portion penetrates through the penetrating grooves, the rear end surface of each horizontal portion abuts against the bottom surface of each sliding groove. Through setting up T shape locating piece, guarantee the firm connection of connecting block and spout.

Preferably, the first positioning structure comprises a left-right wavy track section arranged on the bottom surface of the chute, and clamping assemblies symmetrically arranged on the rear side of the horizontal part, wherein the clamping assemblies respectively correspond to the wavy track section, a plurality of arc-shaped grooves are formed in the wavy track section along the vertical direction at intervals, the arc-shaped grooves extend along the left-right direction, transition spacer blocks are arranged between every two adjacent arc-shaped grooves, each clamping assembly comprises a clamping part matched with the arc-shaped groove and an elastic part for driving the clamping part to trend towards the wavy track, and the corresponding arc-shaped grooves can be clamped in under the pushing of the elastic part and can be separated from the arc-shaped grooves under the action of external force. During actual operation, the elastic part drives the clamping part to enter the arc-shaped groove, the clamping part is limited in the arc-shaped groove at the moment, the connecting block cannot automatically slide along the fluctuation track section, namely, the backrest is limited at the height, when the backrest height needs to be adjusted, the backrest is directly pulled, the clamping part firstly slides to the transition spacer, at the moment, the transition spacer presses the elastic part to enable the clamping part to retract, then the clamping part enters the adjacent arc-shaped groove along the transition spacer, and the elastic part presses the clamping part into the arc-shaped groove again, so that the backrest is positioned at the height.

Preferably, the clamping assembly comprises an arc-shaped elastic plate and a clamping head connected to the rear end face of the arc-shaped elastic plate, the arc-shaped elastic plate is provided with a radian protruding backwards, and the clamping head is hemispherical and is matched with the arc-shaped groove.

Preferably, the chuck is located at the middle part of the arc-shaped elastic plate.

Preferably, the clamping assembly comprises a first wave bead, the first wave bead comprises a first bead body, a fixing seat and a spring arranged in the fixing seat, part of the first wave bead body is positioned in the fixing seat, two ends of the spring are respectively abutted against the bottom surface of the fixing seat and the bottom surface of the first bead body, the part of the first bead body, exposed out of the fixing seat, is matched with the arc-shaped groove, and the fixing seat is arranged on the rear end surface of the horizontal part.

Preferably, the top surface of the transition spacer block is an arc transition surface, and the arc transition surface is smoothly connected with the cambered surface of the arc groove. By arranging the arc-shaped transition surface on the top surface of the transition spacer block, the shock feeling when the backrest is pulled is reduced.

Preferably, the backrest is further provided with a cover plate for closing the notch of the chute, and the cover plate is detachably connected to the front end face of the backrest. In this embodiment, the end face of the cover plate is flush with the end face of the backrest, so that the flatness of the backrest is ensured.

Preferably, a limiting structure is arranged in the sliding groove, and the limiting structure comprises a first limiting plate and a second limiting plate, wherein the first limiting plate is respectively arranged above and below the fluctuation track section, and the second limiting plate is symmetrically arranged on the left side and the right side of the fluctuation track section. Through setting up limit structure, realize the restriction to T shape locating piece in left and right directions, upper and lower direction, specifically, first limiting plate is used for restricting the sliding distance about the T shape locating piece, avoids the fluctuation track section of T shape locating piece roll-off, and the second limiting plate has avoided T shape locating piece to rock in left and right directions when sliding.

Preferably, a second positioning structure is arranged between the rear end face of the connecting block and the mounting seat and used for positioning the connecting block at different angles relative to the mounting seat, the mounting seat is provided with a concave cavity, the second positioning structure comprises an arc chute arranged at the rear end of the connecting block and a cushion block arranged on the bottom face of the concave cavity, the cushion block is matched with the arc chute, a plurality of limiting holes are formed in the top face of the cushion block at intervals, second beads matched with the limiting holes are arranged on the bottom face of the arc chute, and when the second beads are clamped into the limiting holes in different positions, the angles of the connecting block relative to the mounting seat are different. During actual operation, the backrest can be adjusted by pulling the backrest to rotate around the mounting seat, and specifically, the cushion blocks slide along the arc-shaped sliding grooves when the backrest rotates around the mounting seat, the second wave beads are sequentially clamped into/separated from the limiting holes at different positions along the directions of the limiting holes, and when the backrest reaches a required angle, the second wave beads are clamped into the corresponding limiting holes. The second positioning structure limits the back rest to different angles, thereby accommodating the back rest limited to different heights by the first positioning structure.

The principle and beneficial effects of the utility model adopting the technical scheme are as follows:

1. through setting up a location structure, can be with the back position of leaning on the support frame not co-altitude, can adapt to the user of different heights.

2. Through setting up the connecting block and rotating on the mount pad of connection, realize will back the back and can follow human rotation.

3. By providing a second positioning structure, the back rest is limited to different angles.

Drawings

FIG. 1 is a schematic view of a back support mechanism;

FIG. 2 is an exploded schematic view of the back support mechanism;

FIG. 3 is a schematic illustration of the attachment of the mounting block, the connection block, and the T-shaped positioning block;

FIG. 4 is a cross-sectional view of the attachment of the mounting block, the connection block, and the T-shaped positioning block;

FIG. 5 is a schematic illustration of the attachment of a T-shaped positioning block;

FIG. 6 is a schematic view of a mount;

FIG. 7 is a schematic view of a connection block;

FIG. 8 is a schematic view of a back rest;

FIG. 9 is an enlarged schematic view at A of FIG. 8;

FIG. 10 is an enlarged schematic view at B of FIG. 9;

FIG. 11 is a schematic view of the back support mechanism mounted on a seat;

fig. 12 is a schematic view of the engaging assembly in embodiment 2.

The reference numerals in the drawings are as follows:

1. a seat; 2. a back support frame; 3. a backrest; 4. a mounting base; 5. a connecting block; 6. a chute; 7. a T-shaped positioning block; 8. a vertical portion; 9. a horizontal portion; 10. penetrating a groove; 11. a wave track segment; 13. an arc-shaped groove; 14. a transition spacer block; 15. an arc-shaped elastic plate; 16. a chuck; 17. a first bead; 18. a fixing seat; 19. a spring; 20. a cover plate; 21. a first bead; 22. a first limiting plate; 23. a second limiting plate; 24. a cushion block; 25. a second bead; 28. an arc chute; 29. a limiting hole; 30. hollow bumps.

Description of the embodiments

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

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

The specific embodiments of the present utility model are as follows:

examples

As shown in fig. 1 to 11, a back support mechanism for a seat comprises a back support frame 2 and a back support 3, wherein the back support frame 2 is hinged to the rear side of a seat plate of the seat 1, the back support 3 is connected with the back support frame 2 through a connecting component, the connecting component comprises mounting seats 4 which are symmetrically arranged on the back support frame 2 left and right, connecting blocks 5 which are symmetrically arranged on the back of the back support 3 left and right, the connecting blocks 5 are in one-to-one correspondence with the mounting seats 4, the connecting blocks 5 are rotatably arranged on the corresponding mounting seats 4, the back support 3 is arranged on the connecting blocks 5 in a vertical sliding manner, a first positioning structure and a second positioning structure are further arranged between the connecting blocks 5 and the back support 3, when the back support 3 is adjusted to different heights, the first positioning structure is used for positioning the back support on the connecting blocks, and the second positioning structure is used for positioning the back support 3 at different angles relative to the back support frame 2.

In the scheme, when the height of the backrest 3 needs to be adjusted, the backrest 3 is pulled to slide along the connecting block 5, and then the backrest 3 is positioned at the position through the first positioning structure; when the angle of the backrest 3 needs to be adjusted, the backrest 3 is pulled to a required angle, and then the backrest 3 is fixed at the angle through a second positioning structure; so as to adapt to users with different heights and different supporting requirements. In addition, whether the second location structure is selected according to actual demand and is set up, be equipped with the back of second location structure and lean on 3, can follow the back of human body at any time and rotate, guarantee that the user has unique support to experience. In the present embodiment, front and rear refer to front and rear sides of the seat in the depth direction of the seat, and up and down refer to upper and lower sides of the seat in the height direction of the seat.

As shown in fig. 2, 3, 5 and 9, the back of the backrest 3 is symmetrically provided with sliding grooves 6 left and right, the connecting blocks 5 are provided with T-shaped positioning blocks 7, the sliding grooves 6 are in one-to-one correspondence with the T-shaped positioning blocks 7, the T-shaped positioning blocks 7 are slidably arranged in the corresponding sliding grooves 6, the T-shaped positioning blocks 7 comprise vertical portions 8 and horizontal portions 9, through grooves 10 for the vertical portions 8 to pass through are formed in the bottom surfaces of the sliding grooves 6 along the up-down direction, and after the vertical portions 8 pass through the through grooves 10, the rear end surfaces of the horizontal portions 9 are abutted against the bottom surfaces of the sliding grooves 6. Through setting up T shape locating piece 7, guarantee connecting block 5 is connected with the firm of spout 6, first location structure is including controlling the fluctuation track section 11 that sets up in the spout 6 bottom surface, bilateral symmetry sets up the block subassembly at the 9 rear sides of horizontal part, the block subassembly is corresponding with fluctuation track section 11 respectively, fluctuation track section 11 is equipped with a plurality of arc recesses 13 along upper and lower direction interval, arc recess 13 extends along controlling the direction, be equipped with transition spacer 14 between two adjacent arc recesses 13, the block subassembly includes the block portion with arc recess 13 looks adaptation and is used for driving the block portion trend fluctuation orbital elastic part, the block portion can block into corresponding arc recess 13 and can break away from out arc recess 13 under the effect of external force under the promotion of elastic part. During actual operation, the elastic part drives the clamping part to enter the arc-shaped groove 13, the clamping part is limited in the arc-shaped groove 13 at the moment, the connecting block 5 cannot slide along the fluctuation track section 11 by itself, namely, the backrest 3 is limited at the height, when the height of the backrest 3 needs to be adjusted, the backrest 3 is directly pulled, the clamping part firstly slides to the transition spacer 14, the transition spacer 14 presses the elastic part to retract the clamping part at the moment, then the clamping part enters the adjacent arc-shaped groove 13 along the transition spacer 14, and the elastic part presses the clamping part into the arc-shaped groove 13 again, so that the backrest 3 is positioned at the height. In this scheme, the elastic part is arc elastic plate 15, and the block portion is for connecting the dop 16 at the rear end face of arc elastic plate 15, and dop 16 is located the middle part of arc elastic plate 15, and arc elastic plate 15 has the bellied radian backward, and dop 16 is hemispherical and with arc recess 13 looks adaptation. The clamping head 16 enters the arc-shaped groove 13 through the elasticity of the elastic plate, and the movable range of the clamping head 16 is enlarged by arranging the clamping head 16 to be positioned in the middle of the arc-shaped elastic plate 15. In this embodiment, the left and right symmetry is equipped with cavity lug 30 on the back of back 3, cavity lug 30 sets up along vertical direction, cavity formation spout 6 of cavity lug 30, wear groove 10 setting is at the rear end face of cavity lug 30, the preceding terminal surface of back 3 is equipped with the opening that is linked together with cavity lug 30 inside, it can be understood that spout 6 can hold T shape locating piece 7, it has certain thickness to need back 3, this increases the weight that makes back 3, through setting up cavity lug 30, also alleviate the weight of back 3 when providing accommodation space for T shape locating piece 7, be convenient for adjust back 3 and with back 3 location at different height, angle. In addition, the top surface of the transition spacer 14 is an arc transition surface, and the arc transition surface is smoothly connected with the cambered surface of the arc groove 13. By providing the top surface of the transition spacer 14 as an arcuate transition surface, the jerk when pulling the back rest 3 is reduced.

As shown in fig. 4 to 7, the second positioning structure is located between the rear end face of the connection block 5 and the mounting seat 4, the second positioning structure is used for positioning the connection block 5 at different angles relative to the mounting seat 4, the mounting seat 4 is provided with a concave cavity, the second positioning structure comprises an arc chute 28 arranged at the rear end of the connection block 5 and a cushion block 24 arranged at the bottom face of the concave cavity, the cushion block 24 is matched with the arc chute 28, a plurality of limiting holes 29 are formed in the top face of the cushion block 24 at intervals, second beads 25 matched with the limiting holes 29 are formed in the bottom face of the arc chute 28, and when the second beads 25 are clamped into the limiting holes 29 at different positions, the angles of the connection block 5 relative to the mounting seat 4 are different. In actual operation, the backrest 3 can be adjusted by pulling the backrest 3 to rotate around the mounting seat 4, specifically, the backrest 3 slides along the arc-shaped sliding groove 28 when rotating around the mounting seat 4, the second wave beads 25 are sequentially clamped into/separated from the limiting holes 29 at different positions along the directions of the plurality of limiting holes 29, and when the backrest 3 reaches a required angle, the second wave beads 25 are clamped into the corresponding limiting holes 29. The second positioning structure limits the backrest 3 to different angles, thereby accommodating the backrest 3 limited to different heights by the first positioning structure. In the present embodiment, three limiting holes 29 are provided, and the three limiting holes 29 limit the backrest 3 to the reclined state, the upright device, and the forward-tilted state, respectively.

As shown in fig. 2 and 9, a limiting structure is arranged in the chute 6, and the limiting structure comprises a first limiting plate 22 respectively arranged above and below the wavy track section 11, and a second limiting plate 23 arranged on the left and right sides of the wavy track section 11 in bilateral symmetry. Through setting up limit structure, realize the restriction to T shape locating piece 7 in left and right directions, upper and lower direction, specifically, first limiting plate 22 is used for restricting the sliding distance about T shape locating piece 7, avoids T shape locating piece 7 roll-off undulant track section 11, and second limiting plate 23 has avoided T shape locating piece 7 to control the rocking of direction when sliding. In this embodiment, the backrest 3 is further provided with a cover plate 20 for closing the notch of the chute 6, the cover plate 20 is detachably connected to the front end face of the backrest 3, and the end face of the cover plate 20 is flush with the end face of the backrest 3, so that the flatness of the backrest 3 is ensured.

Embodiment 2, this embodiment differs from embodiment 1 in that:

as shown in fig. 12, the clamping assembly includes a first bead 17, the first bead 17 includes a first bead 21, a fixing seat 18, and a spring 19 disposed in the fixing seat 18, part of the first bead 21 is disposed in the fixing seat 18, two ends of the spring 19 respectively abut against the bottom surface of the fixing seat 18 and the bottom surface of the first bead 21, a part of the first bead 21 exposed out of the fixing seat 18 is adapted to the arc-shaped groove 13, and the fixing seat 18 is disposed on the rear end surface of the horizontal portion 9.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims (10)

1. The utility model provides a back supporting mechanism for seat, includes back support frame and back, back support frame articulates the rear side of seat, its characterized in that, back pass through coupling assembling with back support frame links to each other, coupling assembling includes bilateral symmetry setting up mount pad, bilateral symmetry setting on back support frame at the connecting block on back, connecting block and mount pad one-to-one, the connecting block rotates the setting on the mount pad that corresponds, back slides from top to bottom and sets up on the connecting block, the connecting block with still be equipped with first location structure between the back, works as when back is adjusted to different height, first location structure is used for with back location on the connecting block.

2. The back support mechanism for a seat according to claim 1, wherein the back of the backrest is symmetrically provided with sliding grooves in left-right direction, the connecting blocks are provided with T-shaped positioning blocks, the sliding grooves are in one-to-one correspondence with the T-shaped positioning blocks, the T-shaped positioning blocks are slidably arranged in the corresponding sliding grooves, the T-shaped positioning blocks comprise vertical portions and horizontal portions, through grooves for the vertical portions to pass through are formed in the bottom surfaces of the sliding grooves along the up-down direction, and after the vertical portions pass through the through grooves, the rear end surfaces of the horizontal portions are abutted against the bottom surfaces of the sliding grooves.

3. The back support mechanism for a seat according to claim 2, wherein the first positioning structure comprises a wavy track section arranged on the bottom surface of the sliding chute left and right, and a clamping assembly arranged on the rear side of the horizontal part in a bilateral symmetry manner, the clamping assembly corresponds to the wavy track section respectively, the wavy track section is provided with a plurality of arc grooves along the vertical direction at intervals, the arc grooves extend along the left and right directions, a transition spacer is arranged between two adjacent arc grooves, the clamping assembly comprises a clamping part matched with the arc grooves and an elastic part for driving the clamping part to trend towards the wavy track, and the clamping part can be clamped into the corresponding arc grooves under the pushing of the elastic part and can be separated from the arc grooves under the action of external force.

4. A back support mechanism for a seat according to claim 3 wherein the snap-fit assembly comprises an arcuate spring plate, a clip connected to a rear face of the arcuate spring plate, the arcuate spring plate having a rearward convex curvature, the clip being hemispherical and adapted to the arcuate recess.

5. A back support mechanism for a seat according to claim 4 wherein said clip is located in the middle of said arcuate resilient plate.

6. A back support mechanism for a seat according to claim 3, wherein the clamping assembly comprises a first bead, the first bead comprises a first bead body, a fixing seat and a spring arranged in the fixing seat, a part of the first bead body is positioned in the fixing seat, two ends of the spring respectively abut against the bottom surface of the fixing seat and the bottom surface of the first bead body, a part of the first bead body exposed out of the fixing seat is matched with the arc-shaped groove, and the fixing seat is arranged on the rear end surface of the horizontal part.

7. A back support mechanism for a seat according to claim 3 wherein the top surface of the transition spacer is an arcuate transition surface which is in smooth engagement with the arcuate surface of the arcuate recess.

8. A back support mechanism for a seat according to claim 6 wherein the backrest is further provided with a cover plate for closing the slot of the chute, the cover plate being removably attached to the front face of the backrest.

9. The back support mechanism for a seat according to claim 2, wherein a limit structure is arranged in the chute, and the limit structure comprises a first limit plate arranged above and below the wavy track section and a second limit plate arranged on the left and right sides of the wavy track section in bilateral symmetry.

10. The back support mechanism for a seat according to claim 1, wherein a second positioning structure is arranged between the rear end face of the connecting block and the mounting seat, the second positioning structure is used for positioning the connecting block at different angles relative to the mounting seat, the mounting seat is provided with a concave cavity, the second positioning structure comprises an arc-shaped chute arranged at the rear end of the connecting block and a cushion block arranged at the bottom face of the concave cavity, the cushion block is matched with the arc-shaped chute, a plurality of limiting holes are formed in the top face of the cushion block at intervals, second beads matched with the limiting holes are formed in the bottom face of the arc-shaped chute, and when the second beads are clamped into the limiting holes at different positions, the angles of the connecting block relative to the mounting seat are different.