CN209235402U - A kind of seat with adjustable chair-back - Google Patents

Abstract

The utility model provides a kind of seat with adjustable chair-back, including the chair back, seat board and two chair legs, seat board are respectively fixedly connected in two chair legs, which is characterized in that further includes supporting element；Seat board bottom is fixedly connected with bracket, and supporting element can be connected to bracket up or down；The chair back is rotatably arranged at the top of supporting element.The supporting element includes back-cover, connecting plate；Connecting plate is fixedly connected with back-cover, and locating part and external member are equipped at the top of connecting plate, and locating part offers arcuate socket, and the back side of the chair back is equipped with the bull stick for being suitable for wearing external member and the round bar suitable for wearing arcuate socket；Bull stick is equipped with torsional spring, and the back side of the chair back is equipped with the fixture block being clamped with torsional spring.By supporting element, seat board moves up and down the utility model, the chair back can relative support be turned over, chair leg can stretch up and down relatively, the chair back to realize seat is adjustable, height-adjustable, to adapt to the use of different crowd, while it being able to cooperate desk, provides comfortable afternoon nap condition to people.

Description

A kind of seat with adjustable chair-back

Technical field

The utility model belongs to the technical field of the seat, in particular to a kind of seat with adjustable chair-back.

Background technique

Desk and seat are more and more more paid close attention to as the teaching facilities of school's indispensability, more multi-functional, more easypro Suitable desk, seat more help to improve the learning efficiency of student.Currently, most of desk be all by desktop, table leg and Drawer composition, desktop are fixed on table leg, and the chair back of desktop not tiltable, seat is fixed.Such situation, is not easy to student Carry out seat adjustment to increase comforts of use, while be also not easy to students carry out lunch break.

As it can be seen that the prior art could be improved and improve.

Utility model content

Place in view of above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide one kind to have adjustable chair-back Seat, compact-sized, practicability and highly reliable is capable of angle, the height of adjusting back, to improve the comfort used, And it can cooperate with desk and preferable lunch break condition is provided.

In order to achieve the above object, the utility model takes following technical scheme:

A kind of seat with adjustable chair-back, including the chair back, seat board and two chair legs, the seat board are respectively fixedly connected with It further include supporting element in two chair legs；The seat board bottom is fixedly connected with bracket, and the supporting element can connect up or down It is connected to bracket；The chair back is rotatably arranged at the top of supporting element.

In the seat with adjustable chair-back, the supporting element includes back-cover, connecting plate；The connecting plate and back Lid is fixedly connected, and setting finite place piece and external member, the locating part offer arcuate socket, the back side of the chair back at the top of connecting plate It is provided with the bull stick for being suitable for wearing external member and the round bar suitable for wearing arcuate socket；The bull stick is equipped with torsional spring, the back of the chair back Side is provided with the fixture block with torsional spring clamping.

In the seat with adjustable chair-back, the bracket is fixedly connected with chair back control switch；The chair back Control switch includes shaft, fixing seat with groove, Mobile base；One end of the shaft is equipped with handle, the connection of the shaft other end It can rotate in fixing seat and relative to fixed seat, be fixed with convex block on the right side of shaft；The Mobile base is set in the groove of fixing seat, Be equipped with limiting slot on rear side of the right end of Mobile base, the limiting slot is provided with elastic component, the both ends of the elastic component respectively with limit Slot, shaft abut against, and are fixed with fastener on front side of the right end of Mobile base, Mobile base is provided with first for accommodating shaft and convex block Through-hole；The fixing seat is fixed on bracket, and bracket offers the second through-hole passed through suitable for shaft and suitable for fastener sliding Looping pit；The connecting plate offers the first pilot hole and the second pilot hole, and the shaft passes through the first pilot hole, and described second Pilot hole offers the bayonet for being suitable for being clamped with fastener, and the bracket is provided with the guide pad positioned at the second pilot hole；The back Lid offers third pilot hole wearing suitable for shaft, corresponding with the first pilot hole；When the shaft rotates counterclockwise, Convex block and the medial surface of first through hole abut against, and convex block pushes Mobile base to be moved to the left, and fastener is moved to the second guiding from bayonet So that supporting element moves down in hole.

In the seat with adjustable chair-back, the bottom of leg is fixedly connected with support plate, support plate with Chair leg forms inverted T-shaped, and the two sides of the bottom of support plate are respectively arranged with vacuum chuck or rubber mat；It is fixed between two chair legs to connect It is connected to connecting rod.

In the seat with adjustable chair-back, leg includes loop bar and mobile jib；The top of the mobile jib with Seat board is fixedly connected, and mobile jib is arranged in loop bar；The loop bar bottom is fixedly connected on support plate, and the side of loop bar is along short transverse Multiple centers of circle are provided in the circular hole of same vertical line, mobile jib is provided with the elastic button for being adapted to pass through circular hole.

In the seat with adjustable chair-back, the back-cover is connected by screw to connecting plate.

In the seat with adjustable chair-back, the external member is individually fixed in the top two sides of connecting plate, torsional spring Positioned at the top center of connecting plate, locating part is set to the front side of torsional spring.

In the seat with adjustable chair-back, the elastic component includes spring and T-piece, the both ends difference of spring It is connected to limiting slot, T-piece, the T-piece is recessed inwardly the opening for being formed with and matching, abutting against with shaft.

In the seat with adjustable chair-back, the fastener is cylindrical body；The convex block is arc block.

It further include handrail and storage rack in the seat with adjustable chair-back；The seat plate on both sides are fixed respectively It is connected with handrail；The storage rack is set to below seat board and is fixed between chair leg.

The utility model has the advantages that

The utility model provides a kind of seat with adjustable chair-back, and the chair leg of the seat is sheathed on master using loop bar Bar realizes the adjustment of seat board height；Chair back control switch is set between bracket and supporting element, passes through rotational handle, control card The position of part can move up and down supporting element, then with the height of adjusting back when fastener is moved in the second pilot hole from bayonet Degree；When supporting element is pulled to extreme higher position, fastener is moved to bayonet and is abutted against with bayonet, detent is realized, guarantee support Part is stablized motionless and it is avoided to move down；It is connected using the bull stick of chair back back side and the external member of supporting element, to realize that the chair back can be opposite Supporting element rotation, and using torsional spring and chair back back side fixture block, round bar and locating part mating reaction, enable the chair back only by Origin-location is returned under the torque effect of torsional spring, to improve the comfort that people use seat；When people need lunch break, the chair back It turns under the pressure that people's back imposes, to be preferably bonded, support the back of people, and is propped up by subsequent desk The head for supportting people, to provide a relatively comfortable lunch break environment.

Detailed description of the invention

Fig. 1 is the structural perspective of the seat provided by the utility model with adjustable chair-back.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is in the seat provided by the utility model with adjustable chair-back, and the structure of the chair back, supporting element and bracket is shown It is intended to.

Fig. 4 is the structure connection figure of the chair back and supporting element in the seat provided by the utility model with adjustable chair-back.

Fig. 5 is the structural perspective of supporting element and bracket in the seat provided by the utility model with adjustable chair-back.

Fig. 6 is the structural perspective of chair back control switch in the seat provided by the utility model with adjustable chair-back.

Fig. 7 is the internal structure chart of Fig. 6.

Fig. 8 is the working state figure that supporting element moves up in the seat provided by the utility model with adjustable chair-back.

Fig. 9 is the structural perspective of bracket in the seat provided by the utility model with adjustable chair-back.

Figure 10 is the working state figure that supporting element moves down in the seat provided by the utility model with adjustable chair-back.

Figure 11 is the bottom view of the seat provided by the utility model with adjustable chair-back.

Figure 12 is the usage state diagram of the seat provided by the utility model with adjustable chair-back.

Specific embodiment

The utility model provides a kind of seat with adjustable chair-back, to make the purpose of this utility model, technical solution And effect is clearer, clear, and the utility model is further described as follows in conjunction with drawings and embodiments.It should manage Solution, specific embodiment described herein only to explain the utility model, are not used to limit the utility model.

Fig. 1, Fig. 2 are please referred to, the utility model provides a kind of seat with adjustable chair-back, including the chair back 1, seat board 2 With two chair legs 3, seat board 2 is respectively fixedly connected in two chair legs 3, can steadily be consolidated seat board by bolt or welding manner Due in chair leg, which further includes supporting element 4；2 bottom of seat board is fixedly connected with bracket 21, likewise, can pass through bolt Or seat board bottom is fixed in one end of bracket by welding manner；Supporting element 4 can be connected to bracket 21 up or down, to realize branch Support member 4 can be mobile relative to bracket 21, so as to adjusting the height of the chair back 1；The chair back 1 is rotatably arranged in 4 top of supporting element, the chair back Can relative support turn over, the angle of adjusting back is provided with that can fit in the back of people with better angle Strong support.

As shown in figure 3, figure 4 and figure 5, specifically, supporting element 4 includes back-cover 42, connecting plate 41；Connecting plate 41 and back-cover 42 It is fixedly connected, finite place piece 411 is set at the top of connecting plate 41 and external member 43, locating part 411 offer arcuate socket 412, the chair back 1 Back side is provided with the bull stick 14 for being suitable for wearing external member 43 and the round bar 13 suitable for wearing arcuate socket 412；Bull stick 14 is equipped with torsion Spring 6, the back side of the chair back 1 are provided with the fixture block 11 being clamped with torsional spring 6.External member of the bull stick of chair back back side at the top of connecting plate, The chair back can be freely rotated with respect to connecting plate；Then the round bar of chair back back side is passed through into arcuate socket, and then limits turning for the chair back Dynamic angle, realizes limit；Then, torsional spring is packed into bull stick, by the interaction of torsional spring and the fixture block of the chair back, so that the chair back exists It is not overturn forward in the case where by other external force, until round bar is in contact with the bottom interior wall of arcuate socket, in this way, not influencing people It sits up straight, and when people's back relies on the chair back, the chair back can be bonded with more preferably angle with back, improve comfort. In addition, needing lunch break in people, people lean on back backward, and when head is placed in subsequent desk, back imposes the chair back Active force drives the chair back that the torque of torsional spring is overcome to act on and turns over, to be preferably bonded, support the back of people, so that people Can be with comfortable lunch break.

Specifically, back-cover 42 is connected by screw to connecting plate 41, or is in a snap-fit manner installed on connecting plate insertion Back-cover simultaneously imposes buckle.

Specifically, as shown in figure 4, external member 43 is individually fixed in the top two sides of connecting plate 41, torsional spring 6 is located at connecting plate 41 Top center, locating part 411 be set to torsional spring 6 front side, by be symmetrical arranged so that uniform force and beauty.Chair back back side There are two backboards 12 for connection, and round bar 13 and bull stick 14 are fixedly connected between two backboards.

As shown in Fig. 3, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, specifically, bracket 21 is fixedly connected with chair back control switch 5；Chair Carrying on the back control switch 5 includes shaft 51, the fixing seat 52 with groove 521, Mobile base 53；One end of shaft 51 is equipped with handle 511, turns 51 other end of axis is connected to fixing seat 52 and can rotate relative to fixed seat 52, and the right side of shaft 51 is fixed with convex block 512；Mobile base 53 are set in the groove 521 of fixing seat 52, limiting slot 534 are equipped on rear side of the right end of Mobile base 53, limiting slot 534 is arranged flexible Part, the both ends of elastic component are abutted against with limiting slot 534, shaft 51 respectively, are fixed with fastener 533 on front side of the right end of Mobile base 53, Mobile base 53 is provided with the first through hole 531 for accommodating shaft 51 and convex block 512；Fixing seat 52 is fixed on bracket 21, fixed The connecting pin 522 of seat left and right ends is fixedly connected by bolt with bracket；Bracket 21 offers second passed through suitable for shaft 51 Through-hole 213 and the looping pit 212 slided suitable for fastener 533；Connecting plate 41 offers the first pilot hole 412 and the second pilot hole 413, shaft 51 passes through the first pilot hole 412, and the second pilot hole 413 offers the bayonet 414 for being suitable for being clamped with fastener 533, branch Frame 21 is provided with the guide pad 211 positioned at the second pilot hole 413；Back-cover 42 offer it is being worn suitable for shaft 51, led with first To the corresponding third pilot hole 421 in hole 412.In addition, as shown in Figure 6, Figure 7, offering limit on front side of the left end of Mobile base 53 Hole 532, fixing seat 53 are provided with the gag lever post 523 positioned at limit hole 532, and gag lever post 523 and fixing seat 52 are integrally formed, pass through The setting of gag lever post and limit hole limits the distance that Mobile base is moved to the left.Furthermore it is possible to be threadedly coupled in limit hole There is limit plate, limit plate is set to the front side of Mobile base, so that Mobile base can only move left and right in groove 521 without taking off From fixing seat.

As shown in Fig. 5, Fig. 6, Fig. 7, Fig. 8, the course of work of chair back control switch is as follows: rotating counterclockwise in shaft 51 When, convex block 512 and the medial surface of first through hole 531 abut against, and during rotation, convex block 512 is rotated synchronously with shaft And pushing Mobile base 53 that the elastic force of elastic component is overcome to be moved to the left, fastener 533 is moved in the second pilot hole 413 from bayonet 414 So that supporting element 4 moves down.When needing to move up supporting element, shaft is rotated clockwise, then moves up supporting element, until card Part and bayonet are in same level；In the case where losing impetus power of the convex block to Mobile base, Mobile base is due to elasticity The elastic effect of part, moves right, while fastener is moved to right with Mobile base, is moved in bayonet, and is in contact with bayonet, realizes card Position, supporting element is fixed.As shown in Fig. 8, Figure 10, guide pad 211 is cylindrical body, can open up connecting hole, and guide pad is logical Connecting hole, screw are crossed to be fixedly connected with limited block 216, by connecting plate and bracket stable connection, so that connecting plate can only be along The direction of one pilot hole is mobile；In addition to this, limited block 216 can directly be socketed on guide pad 211, or using welding manner into Row is fixed.Shaft sequentially passes through third pilot hole, the first pilot hole, the second through-hole, first through hole and is rotatably arranged in fixing seat. Fastener sequentially passes through the looping pit of bracket, the second pilot hole.As shown in figure 9, bracket includes two linking arms 215 and fixed plate 214, The both ends of fixed plate are respectively fixedly connected in one end of two linking arms, and the other end of linking arm is fixedly connected with seat board.

Specifically, as shown in fig. 7, elastic component includes spring 542 and T-piece 541, the both ends of spring 542 are connected to respectively The inner wall of limiting slot 534, T-piece 541, T-piece 541 are recessed inwardly the opening for being formed with and matching, abutting against with shaft 51.T Shape part can be made of cylindrical body and cube, at T-shaped with shape, and spring pocket is set to cylindrical body, and abuts with cube.Cylindrical body and cube It can be made of metal, the opening that in addition cube is not opened in shaft abutting can also be can equally be connected to shaft, as preferred Ground, T-piece open up the circular open to match with shaft, can avoid T-piece in this way and move up and down.

Specifically, as shown in fig. 6, fastener 533 is cylindrical body；Convex block 512 is arc block.Bayonet matches with fastener, when So, fastener is also possible to cuboid or other shapes.

Specifically, shown in as shown in Figure 1, Figure 2, Figure 11, the bottom of chair leg 3 is fixedly connected with support plate 33, support plate 33 and chair Leg 3 forms inverted T-shaped, and the two sides of the bottom of support plate 33 are respectively arranged with vacuum chuck 34 or rubber mat；It is solid between two chair legs 3 Surely it is connected with connecting rod 35.Such structure design, so that chair leg is more stable, will not deviate, moreover, promoting seat that can put down Steady is placed on ground, will not move easily.

Specifically, chair leg 3 includes loop bar 32 and mobile jib 31；The top of mobile jib 31 is fixedly connected with seat board 2, by bolt or Welding manner is fixed；Mobile jib 31 is arranged in loop bar 32；32 bottom of loop bar is fixedly connected on support plate 33, the side of loop bar 32 Multiple centers of circle are provided in the circular hole of same vertical line along short transverse, and mobile jib 31 is provided with the elastic button for being adapted to pass through circular hole The salient point of umbrella (switch), elastic button is made of spring and shackle member, and mobile jib opens up one and is suitable for accommodating spring and shackle member Cylindrical hole, shackle member put in circular hole under the elastic force of spring, realize that detent, shackle member can be ball or cylindrical body.Connecting rod 35 both ends are individually fixed in loop bar 32.Specifically, shown in as shown in Figure 1, Figure 2, Figure 11, which further includes handrail 7 and storage rack 8；2 two sides of seat board have been respectively fixedly connected with handrail 7, and handrail is fixed on the bottom of seat board by bolt or welding manner；Storage rack 8 It set on 2 lower section of seat board and is fixed between chair leg 3, storage rack two sides offer the opening for being suitable for being clamped with chair leg, pass through clamping Mode avoids storage rack swing；The bottom connection of connecting rod 35 and storage rack touches, and plays a supporting role to storage rack.

It is inclination angle that the chair back and supporting element, which are formed by angle,.In normal use, by the height adjustment of the chair back to highest Position, while inclination angle is adjusted to minimum (round bar is in contact with the bottom interior wall of arcuate socket), is supported to back；Carry out When lunch break, as shown in figure 12, the height of the chair back is adjusted to extreme lower position, while inclination angle is adjusted to maximum (round bar and arcuate socket Top inner wall be in contact), to back carry out powerful support, head is fixed against on subsequent desk convenient for people.In addition, also A kind of desk that desktop can turn forward can be cooperated, then be equipped with bed, pillow, bed is layered on desktop and seat board surface, And bed is fixed, and pillow is connected in desktop, to form chaise longue；Usually, bed and pillow can be placed in seat board In beneath storage rack.

In conclusion the utility model provides a kind of seat with adjustable chair-back, the chair leg of the seat is using set Rod set is set to mobile jib, realizes the adjustment of seat board height；Chair back control switch is set between bracket and supporting element, by rotating hand Handle controls the position of fastener, when fastener is moved in the second pilot hole from bayonet, then can move up and down supporting element, to adjust The height of the chair back；When supporting element is pulled to extreme higher position, fastener is moved to bayonet and is abutted against with bayonet, detent is realized, Guarantee that supporting element is stablized motionless and it is avoided to move down；It is connected using the bull stick of chair back back side and the external member of supporting element, to realize chair Back can relative support rotation enable the chair back and using fixture block, round bar and the locating part mating reaction of torsional spring and chair back back side It is enough only to return to origin-location under by the torque effect of torsional spring, to improve the comfort that people use seat；When people need the noon When not, the chair back is turned under the pressure that people's back imposes, to be preferably bonded, support the back of people, and by below Desk support the head of people, to provide a relatively comfortable lunch break environment.

It is understood that for those of ordinary skills, can with technical solution according to the present utility model and The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement all should belong to appended by the utility model Scope of protection of the claims.

Claims (9)

1. a kind of seat with adjustable chair-back, including the chair back, seat board and two chair legs, the seat board be respectively fixedly connected in In two chair legs, which is characterized in that further include supporting element；The seat board bottom is fixedly connected with bracket, the supporting element can on Under be movably connected to bracket；The chair back is rotatably arranged at the top of supporting element；

The supporting element includes back-cover, connecting plate；The connecting plate is fixedly connected with back-cover, and finite place piece is arranged at the top of connecting plate And external member, the locating part offer arcuate socket, the back side of the chair back is provided with the bull stick for being suitable for wearing external member and is suitable for Wear the round bar of arcuate socket；The bull stick is equipped with torsional spring, and the back side of the chair back is provided with the fixture block with torsional spring clamping.

2. the seat according to claim 1 with adjustable chair-back, which is characterized in that the bracket is fixedly connected with chair Carry on the back control switch；The chair back control switch includes shaft, fixing seat with groove, Mobile base；One end of the shaft is equipped with Handle, the shaft other end are connected to fixing seat and can rotate relative to fixed seat, are fixed with convex block on the right side of shaft；The Mobile base In the groove of fixing seat, limiting slot is equipped on rear side of the right end of Mobile base, the limiting slot is provided with elastic component, the elasticity The both ends of part are abutted against with limiting slot, shaft respectively, are fixed with fastener on front side of the right end of Mobile base, Mobile base is provided with for holding Receive the first through hole of shaft and convex block；The fixing seat is fixed on bracket, and bracket offers the second through-hole passed through suitable for shaft And the looping pit suitable for fastener sliding；The connecting plate offers the first pilot hole and the second pilot hole, and the shaft passes through First pilot hole, second pilot hole offer the bayonet for being suitable for being clamped with fastener, and the bracket is provided with leads positioned at second To the guide pad in hole；The back-cover offers third pilot hole wearing suitable for shaft, corresponding with the first pilot hole；Institute When stating shaft and rotating counterclockwise, the medial surface of convex block and first through hole is abutted against, and convex block pushes Mobile base to be moved to the left, fastener from Bayonet is moved in the second pilot hole so that supporting element moves down.

3. the seat according to claim 1 with adjustable chair-back, which is characterized in that the bottom of leg is fixed to be connected It is connected to support plate, support plate and chair leg form inverted T-shaped, and the two sides of the bottom of support plate are respectively arranged with vacuum chuck or Rubber foot Pad；Connecting rod is fixedly connected between two chair legs.

4. the seat according to claim 3 with adjustable chair-back, which is characterized in that leg includes loop bar and master Bar；The top of the mobile jib is fixedly connected with seat board, and mobile jib is arranged in loop bar；The loop bar bottom is fixedly connected on support plate, The side of loop bar is provided with multiple centers of circle in the circular hole of same vertical line along short transverse, and mobile jib, which is provided with, is adapted to pass through circular hole Elastic button.

5. the seat according to claim 1 with adjustable chair-back, which is characterized in that the back-cover passes through with connecting plate Screw connection.

6. the seat according to claim 1 with adjustable chair-back, which is characterized in that the external member is individually fixed in company The top two sides of fishplate bar, torsional spring are located at the top center of connecting plate, and locating part is set to the front side of torsional spring.

7. the seat according to claim 2 with adjustable chair-back, which is characterized in that the elastic component include spring and T-piece, the both ends of spring are connected to limiting slot, T-piece respectively, the T-piece be recessed inwardly be formed with match with shaft, phase The opening of abutting.

8. the seat according to claim 2 with adjustable chair-back, which is characterized in that the fastener is cylindrical body；Institute Stating convex block is arc block.

9. the seat according to claim 1 with adjustable chair-back, which is characterized in that further include handrail and storage rack； The seat plate on both sides have been respectively fixedly connected with handrail；The storage rack is set to below seat board and is fixed between chair leg.