CN215533030U - Adjusting device of two-way type backrest - Google Patents

Abstract

The utility model relates to the technical field of furniture, in particular to a bidirectional backrest adjusting device, which comprises: the fixing piece, the rotating group, the sliding piece and the backrest fixing plate are arranged on the backrest; any end of the rotating group is hinged with the fixing piece and rotates by taking the fixing piece as a fixed point; the sliding part is arranged on the backrest fixing plate in a relatively sliding manner; the other end of the rotating group is hinged with a sliding part or a backrest fixing plate, and when the sliding part moves horizontally along the backrest fixing plate in a mutually approaching or separating way, the rotating group can be driven to rotate around the fixing part to drive the backrest fixing plate to move horizontally close to or far away from the fixing part; the sliding part is also rotatably provided with a locking piece for controlling the sliding part to be fixed along the backrest fixing plate; the backrest fixing plate is driven to horizontally move close to or far away from the fixing piece by the matching of the rotating part and the sliding component, so that the sitting depth requirement of a human body is adjusted; through the locking piece that adds, can realize the electrodeless locking to the slider and carry out effective fixed after adjusting the seat depth of the back of the chair.

Description

Adjusting device of two-way type backrest

Technical Field

The utility model relates to the technical field of furniture, in particular to a bidirectional backrest adjusting device.

Background

The furniture is composed of four main factors of materials, structures, appearance shapes and functions, wherein the structures and the functions are main driving forces for promoting the development of the furniture, and the chair is one of furniture which is most widely used in household and office occasions. With the continuous pursuit of people for the quality of life, the market especially strives for ergonomic chairs, and the functional and structural changes of the chairs are more and more abundant. However, the inventor finds that the double-backrest chair in the current market can ensure that the ribs on two sides of the back of a user are stressed uniformly, so that the comfort level of the user is improved.

For example, the patent No. 210407761U discloses a dual-backrest office chair, which is capable of being disassembled and assembled by screws, connectors and L-shaped reinforcing bars disposed on the back seat surface, but this solution only achieves the function of easy disassembly and assembly, and is not conducive to the user to adjust his or her sitting posture appropriately when using the chair.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems, an object of the present invention is to provide an adjusting device for a two-way backrest.

In order to achieve the purpose, the utility model provides the following technical scheme: an adjustment device for a reversible backrest, comprising: the fixing piece, the rotating group, the sliding piece and the backrest fixing plate are arranged on the backrest; any end of the rotating group is hinged with the fixing piece and rotates by taking the fixing piece as a fixed point; the sliding part is arranged on the backrest fixing plate in a relatively sliding manner; the other end of the rotating group is hinged with a sliding part or a backrest fixing plate, and when the sliding part moves horizontally along the backrest fixing plate in a mutually approaching or separating way, the rotating group can be driven to rotate around the fixing part to drive the backrest fixing plate to move horizontally close to or far away from the fixing part; the sliding part is also rotatably provided with a locking piece for controlling the sliding part to be fixed along the backrest fixing plate.

As a preferable mode of the present invention, the present invention further comprises an elastic member; two ends of the elastic piece are clamped on the opposite sliding pieces; a limit block for clamping the elastic piece is arranged on the backrest fixing plate between the sliding pieces.

Further, the slider includes: the mounting plate, the slide block and the fixed blocks; a sliding groove for the sliding block to move is formed in the backrest fixing plate; the sliding blocks are fixed on the mounting plate and can penetrate through the corresponding sliding grooves; the mounting plate is provided with a clamping groove; two ends of the elastic piece are clamped in the corresponding clamping grooves; the fixed block is detachably connected with the mounting plate; the backrest fixing plate is clamped between the fixing block and the mounting plate; a limiting hole is formed in the fixed block; the limiting hole is matched with the sliding block; the fixed block is provided with a fixed bolt; the fixing bolt is in threaded connection with the mounting plate.

As a preferable aspect of the present invention, the rotation group is a rotation portion, and the rotation portion includes: the rotating arms are oppositely arranged; one end of the rotating arm is hinged with the corresponding mounting plate, and the other end of the rotating arm is connected with a rotating block; a plurality of tooth sockets are arranged on the rotating block; the rotating blocks are mutually engaged and accommodated in the fixing piece.

As another preferred scheme of the present invention, the rotating group is a rotating assembly, the rotating assembly includes rotating rods hinged to each other and enclosing into a quadrilateral structure, wherein a hinged end of any one of the rotating rods is mounted on the fixing member, and a hinged end of the rotating rod opposite thereto is disposed on the backrest fixing plate; the rotating rod close to the backrest fixing plate is abutted against the mounting plate.

Further, the lock member includes: a rotating member, a handle; the rotating piece is sleeved between the mounting plate and the fixed block; the grab handle is fixedly connected with the rotating piece and is arranged towards the surface far away from the limiting block.

Furthermore, one surface of the fixing piece facing the backrest fixing plate is provided with a storage groove; the rotating group extends into the object placing groove; the rotating group is provided with a rotating hole; the fixing piece is also provided with a slot which is positioned above the object placing groove; a plug pin vertically penetrating through the rotating group is inserted in the slot; the slot is provided with a protective cover.

Furthermore, a baffle is also arranged on the fixing piece; the rotating block is limited in the storage groove by the baffle; the mounting hole has still been seted up to the one end that the mounting deviates from back fixed plate.

Furthermore, a connecting block is arranged on one surface of the backrest fixing plate, which is far away from the fixing piece; the connecting block is provided with an object placing opening, and a movable piece capable of twisting is arranged in the object placing opening; the movable piece is provided with a back cushion on the surface deviating from the backrest fixing plate.

As a preferable scheme of the utility model, the seat comprises a bidirectional backrest adjusting device, and the mounting hole in the fixing piece is sleeved on the seat rod.

Compared with the prior art, the utility model has the following beneficial effects:

1. the backrest fixing plate is driven to horizontally move close to or far away from the fixing piece by the matching of the rotating part and the sliding component, so that the sitting depth requirement of a human body is adjusted; meanwhile, the adjusting device drives the chair back to be always attached to the back of the human body so as to stably support the back of the human body;

2. through the locking piece that adds, can realize the electrodeless locking to the slider and carry out effective fixed after adjusting the seat depth of the back of the chair.

Drawings

Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic main structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic diagram of an exploded structure according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a sliding member according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a rotating arm according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a backrest fixing plate according to an embodiment of the utility model;

FIG. 6 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 7 is a schematic structural view of a chair according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a seat according to a second embodiment of the present invention.

In the figure: 1. a fixing member; 11. a storage groove; 12. a slot; 121. a bolt; 13. a protective cover; 14. a baffle plate; 15. mounting holes; 2. a rotating part; 21. a rotating arm; 211. rotating the block; 2111. a tooth socket; 2112. rotating the hole; 22. a rotating assembly; 221. rotating the rod; 3. a slider; 31. mounting a plate; 311. a card slot; 32. a slider; 33. a fixed block; 331. a limiting hole; 332. fixing the bolt; 4. a locking member; 41. a rotating member; 42. a handle; 5. a backrest fixing plate; 51. a chute; 6. an elastic member; 7. a limiting block; 8. connecting blocks; 81. an article placing opening; 9. a movable member; 10. and (6) backing up.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

As shown in fig. 1 and 6, an adjusting device for a two-way backrest comprises: the device comprises a fixed part 1, a rotating group, a sliding part 3 and a backrest fixing plate 5; the tail end of the rotating group is hinged with the fixing piece 1 and rotates by taking the fixing piece 1 as a fixed point; the sliding parts 3 are arranged in two groups and are arranged on the backrest fixing plates 5 at the left end and the right end; the front ends of the rotating groups are respectively hinged on the corresponding sliding parts 3, or the front ends of the rotating groups are hinged on the backrest fixing plate 5, and when the sliding parts 3 move horizontally along the backrest fixing plate 5 in a mutual approaching or separating manner, the rotating groups can be driven to rotate around the fixing part 1, so that the backrest fixing plate 5 is driven to move horizontally close to or far away from the fixing part 1; a locking piece 4 for controlling the sliding piece 3 to be fixed along a backrest fixing plate 5 is also rotatably arranged on the sliding piece 3; in light of the above description of the technical features, two different embodiments of the utility model and their modes of motion are briefly described here:

in the first embodiment, the front ends of the rotating groups are respectively hinged on the corresponding sliding parts 3:

as shown in fig. 1, firstly, when the locking piece 4 rotates to abut against the backrest fixing plate 5, the sliding piece 3 is driven to be locked, and at the moment, the backrest fixing plate 5 relatively keeps a fixed state;

when the locking piece 4 is separated and the sliding piece 3 moves along the backrest fixing plate 5 to be close to each other, the rotating part 2 can be driven to rotate around the fixing piece 1, so that the backrest fixing plate 5 is driven to gradually approach the fixing piece 1;

thirdly, when the locking pieces 4 move to be separated from each other along the backrest fixing plate 5, the rotating part 2 simultaneously rotates around the fixing piece 1, so that the backrest fixing plate 5 is driven to gradually get away from the fixing piece 1 (which can be obtained by simple association based on fig. 1, and therefore, detailed description of the attached drawings is omitted); as shown in fig. 2, in actual operation, the backrest can be directly mounted on the backrest fixing plate 5 (since the technology is simple, the detailed description and the description of the drawings are omitted below), so as to realize the adjustment of the front and rear seat depths of the backrest.

In the second embodiment, the front end of the rotating group is hinged on the backrest fixing plate 5:

as shown in fig. 6, firstly, when the locking piece 4 rotates to abut against the backrest fixing plate 5, the sliding piece 3 is driven to be locked, and the backrest fixing plate 5 relatively keeps a fixed state;

secondly, when the locking piece 4 is separated, the sliding piece 3 moves along the backrest fixing plate 5 to be close to each other, the rotating part 2 can be driven to rotate around the fixing piece 1, and the backrest fixing plate 5 is driven to gradually get away from the fixing piece 1 (based on fig. 8, a simple association can be made, so detailed drawing description is not needed);

③ when the locking piece 4 moves to separate from each other along the backrest fixing plate 5, the rotating part 2 rotates around the fixing piece 1 at the same time, thereby driving the backrest fixing plate 5 to gradually approach the fixing piece 1.

As shown in fig. 2, the device further comprises an elastic member 6, the elastic member 6 can be a flexible rubber band made of elastic engineering plastics, an extension spring and a pressure spring, and for convenience of operation, the flexible rubber band is used for illustration in the present application; the elastic piece 6 is clamped between the two groups of sliding pieces 3; be equipped with on the back fixed plate 5 between slider 3 and carry out the solid stopper 7 of card to elastic component 6, carry out spacing fixed to elastic component 6 for being convenient for better, therefore, stopper 7 sets up the axis department at two sets of sliders 3, and the median line department of elastic component 6 is vertical to be provided with a rubber band area, and this rubber band area card is established in stopper 7.

As shown in fig. 1 to 3, for the sake of explanation, a set of slides 3 according to the present invention comprises: a mounting plate 31, two sliding blocks 32 and two fixed blocks 33; a sliding groove 51 for the sliding block 32 to move is arranged on the backrest fixing plate 5; the slide block 32 is fixed on the mounting plate 31 and can pass through the corresponding slide groove 51; a square clamping groove 311 is formed in one surface, facing the backrest fixing plate 5, of the mounting plate 31; two ends of the elastic element 6 are clamped in the corresponding clamping grooves 311 to realize limiting and fixing; the fixed block 33 is detachably connected with the mounting plate 31; the backrest fixing plate 5 is clamped between the fixing block 33 and the mounting plate 31; in actual operation, the mounting plate 31 can be arranged in a shape of "]" and is sleeved on the backrest fixing plate 5 to drive the elastic part 6 to be limited between the mounting plate 31 and the backrest fixing plate 5; the fixed block 33 is provided with a limiting hole 331; the slide block 32 passes through the slide slot 51 and then extends into the corresponding limit hole 331; the fixing block 33 is provided with a fixing bolt 332; the fixing bolt 332 is in threaded connection with the mounting plate 31 to realize the limiting and fixing of the mounting plate 31 and the fixing block 33.

As shown in fig. 2 and 4, the rotating group in the first embodiment is a rotating part 2, and the rotating part 2 includes: a set of oppositely arranged rotating arms 21 (i.e. two rotating arms 21 are symmetrically arranged); one end of each of the two rotating arms 21 is hinged with the mounting plate 31, and the other end is connected with a rotating block 211; tooth grooves 2111 are arranged on the rotating block 211 in an annular array; the tooth grooves 2111 of the two rotating blocks 211 are engaged with each other and received in the fixing member 1, and can be rotated in the positioning member.

As shown in fig. 2, the lock member 4 includes: a rotary member 41 (in an elliptical shape), a grip 42; for the convenience of understanding, the locking member 4 is disposed on the fixing bolt 332 between the mounting plate 31 at the bottom and the fixing member 1 and is located right below the backrest fixing plate 5, so that the handle 42 is manually operated to drive the rotating member 41 to rotate around the fixing bolt 332 to abut against or separate from the backrest fixing plate 5, thereby realizing stepless locking or movement; the handle 42 is fixedly connected to the rotating member 41 and is disposed toward a side away from the stopper 7 for easy manual adjustment.

As shown in fig. 1 and 4, a storage slot 11 is opened on one surface (i.e. the front surface) of the fixing member 1 facing the backrest fixing plate 5; the rotating arm 21 partially extends into the storage slot 11, and the rotating block 211 is accommodated in the storage slot 11; a rotating hole 2112 is formed in the center of the rotating block 211; the top of the fixed part 1 is also provided with a slot 12, and the slot 12 is positioned above the object placing slot 11; a plug pin 121 vertically penetrating through the rotating hole 2112 is inserted into the slot 12 to limit the rotating block 211; a protective cover 13 is mounted on the socket 12 to protect the plug 121.

As shown in fig. 2, the fixing member 1 is further provided with a baffle plate 14; the baffle 14 limits the rotating block 211 in the article placing groove 11, so that the rotating block 211 is protected, and potential safety hazards are reduced; the fixing member 1 is further provided with a mounting hole 15 at one end (i.e. the reverse side) away from the backrest fixing plate 5, and the mounting hole 15 is used for sleeving the fixing member 1 on the seat frame of the seat.

As shown in fig. 2 and 5, a connecting block 8 is mounted on a side of the backrest fixing plate 5 facing away from the fixing member 1 (i.e., on the front side of the backrest fixing plate 5); a square object placing opening 81 is formed in the connecting block 8, a movable piece 9 capable of twisting is arranged in the object placing opening 81, wherein the movable piece 9 can be made of elastic engineering plastics and springs and can be twisted at a slight angle; a back cushion 10 is mounted on the side of the movable element 9 facing away from the backrest fixing plate 5 (i.e. on the front side of the movable element 9).

As shown in fig. 6, the rotating group of the second embodiment is a rotating assembly 22, the rotating assembly 22 includes rotating rods 221 hinged to each other and enclosing a quadrilateral structure, and the rotating rods 221 are symmetric in pairs; the installation method of the hinged end (rear end) of any one of the rotating rods 221 is the same as the installation method of the rotating block 211 and the fixing member 1 or the hinged end of the rotating rod 221 is inserted into the fixing member 1, which is not described herein again, and the hinged end (front end) of the rotating rod 221 opposite thereto is rotatably installed on the backrest fixing plate 5 (same as above); the rotating rod 221 close to the backrest fixing plate 5 abuts against the mounting plate 31, and when the mounting plate 31 moves along the sliding groove 51 along with the sliding block 32, the seat depth of the backrest can be adjusted by changing the included angle between the rotating rods 221 and the rotating rod 221.

As shown in fig. 7 and 8, the technical scheme of the adjusting device for the bidirectional backrest is applied to a seat, and specifically, the mounting hole 15 of the fixing piece 1 is sleeved on the seat rod, so that the chair back can be detached, meanwhile, the adjusting device is suitable for stepless adjustment of different sitting depth habits of multiple people, and can support the back of the human body in real time, further relieve the fatigue of the waist and the back, and improve the comfort of the seat when the seat is leaned on and the health requirements of the seat of the human body.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (10)

1. An adjustment device for a reversible backrest, comprising: the backrest fixing plate comprises a fixing piece (1), a rotating group, a sliding piece (3) and a backrest fixing plate (5); any end of the rotating group is hinged with the fixing piece (1) and rotates by taking the fixing piece (1) as a fixed point; the sliding part (3) is arranged on the backrest fixing plate (5) in a relatively sliding manner; the other end of the rotating group is hinged with a sliding part (3) or a backrest fixing plate (5), and when the sliding part (3) moves horizontally along the backrest fixing plate (5) in a mutually approaching or separating way, the rotating group can be driven to rotate around the fixing part (1) to drive the backrest fixing plate (5) to move horizontally close to or far away from the fixing part (1); and a locking piece (4) for controlling the sliding piece (3) to be fixed along the backrest fixing plate (5) is further rotatably arranged on the sliding piece (3).

2. A device for adjusting a backrest of a bi-directional type as claimed in claim 1, further comprising an elastic member (6); two ends of the elastic piece (6) are clamped on the opposite sliding pieces (3); and a limiting block (7) for clamping and fixing the elastic piece (6) is arranged on the backrest fixing plate (5) between the sliding pieces (3).

3. The adjustment device of a two-way backrest according to claim 2, characterized in that said slider (3) comprises: the mounting plate (31), the sliding block (32) and a plurality of fixing blocks (33); a sliding groove (51) for the sliding block (32) to move is formed in the backrest fixing plate (5); the sliding blocks (32) are fixed on the mounting plate (31) and can penetrate through the corresponding sliding grooves (51); a clamping groove (311) is formed in the mounting plate (31); two ends of the elastic piece (6) are clamped in the corresponding clamping grooves (311); the fixed block (33) is detachably connected with the mounting plate (31); the backrest fixing plate (5) is clamped between the fixing block (33) and the mounting plate (31); a limiting hole (331) is formed in the fixed block (33); the limiting hole (331) is matched with the sliding block (32); a fixing bolt (332) is mounted on the fixing block (33); the fixing bolt (332) is in threaded connection with the mounting plate (31).

4. A device for adjusting a two-way backrest according to claim 3, characterized in that said rotating group is a rotating part (2), said rotating part (2) comprising: a rotating arm (21) arranged oppositely; one end of the rotating arm (21) is hinged to the corresponding mounting plate (31), and the other end of the rotating arm is connected with a rotating block (211); a plurality of tooth grooves (2111) are formed in the rotating block (211); the rotating blocks (211) are mutually engaged and accommodated in the fixed part (1).

5. A reclining device according to claim 3, wherein said rotating group is a rotating member (22), said rotating member (22) comprises rotating rods (221) hinged to each other and enclosing a quadrilateral structure, wherein the hinged end of any one of the rotating rods (221) is mounted on the fixed member, and the hinged end of the rotating rod (221) opposite to the fixed member is disposed on the backrest fixing plate (5); the rotating rod (221) close to the backrest fixing plate (5) is abutted against the mounting plate (31).

6. The adjustment device of a two-way backrest according to any one of claims 4 or 5, characterized in that said blocking member (4) comprises: a rotating member (41) and a grip (42); the rotating piece (41) is sleeved between the mounting plate (31) and the fixed block (33); the grab handle (42) is fixedly connected with the rotating piece (41) and is arranged towards the surface far away from the limiting block (7).

7. The adjusting device for the two-way backrest as claimed in claim 4 or 5, wherein the fixing member (1) is provided with a storage slot (11) on one surface facing the backrest fixing plate (5); the rotating group extends into the storage groove (11); the rotating group is provided with a rotating hole (2112); the fixing piece (1) is also provided with a slot (12), and the slot (12) is positioned above the storage groove (11); a plug pin (121) vertically penetrating through the rotating group is inserted into the slot (12); and a protective cover (13) is arranged on the slot (12).

8. A device for adjusting a two-way backrest according to claim 6, wherein said fixed member (1) is further provided with a baffle plate (14); the baffle (14) limits the rotating block (211) in the storage groove (11); and one end of the fixing piece (1) departing from the backrest fixing plate (5) is also provided with a mounting hole (15).

9. A device for adjusting a two-way backrest according to claim 2, characterized in that a connecting block (8) is mounted on the side of the backrest fixing plate (5) facing away from the fixing member (1); an article placing opening (81) is formed in the connecting block (8), and a movable piece (9) capable of twisting is arranged in the article placing opening (81); and a back cushion (10) is arranged on one surface of the movable piece (9) departing from the backrest fixing plate (5).

10. A chair, characterized in that, comprising a two-way backrest adjusting device as claimed in any one of claims 1-9, the mounting hole (15) of the fixing member (1) is sleeved on the chair rod.

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