CN206462690U

CN206462690U - The curvature adjusting apparatus of the chair back

Info

Publication number: CN206462690U
Application number: CN201620866393.9U
Authority: CN
Inventors: 陈朝根
Original assignee: TAIHUA FURNITURE CO Ltd
Current assignee: TAIHUA FURNITURE CO Ltd
Priority date: 2016-08-11
Filing date: 2016-08-11
Publication date: 2017-09-05
Anticipated expiration: 2026-08-11
Also published as: EP3281559B1; EP3281559A1; KR20180018387A

Abstract

A kind of curvature adjusting apparatus of chair back, including a flexible chair back, a backrest, a drawstring and a drive mechanism, wherein, the chair back has a fixing end and a movable end, and the fixing end is connected motionless with backrest, and movable end is then connected to drawstring；Drawstring has a connection end and a drive end, and the connection end is connected with the movable end of the chair back, and drive end is then connected to drive mechanism, and the drive mechanism is connected in backrest；By means of the path of driving mechanisms control drawstring, the curvature of the chair back can be made to produce change and carry on the back property with more patch.

Description

The curvature adjusting apparatus of the chair back

Technical field

The utility model is related to a kind of seat, is cosily taken to provide people, and particularly one kind can coordinate and make The curvature of the chair back is adjusted with demand, makes it with more the seat unit of patch back of the body property.

Background technology

The comfort taken for increase, the patch back of the body property of the chair back is definitely one of indispensable factor.Particularly in Lumbar Part, if permanent sitting posture does not obtain appropriate support, can not only feel to have a pain in the back, more likely cause deformity of spinal column etc. Permanent injury.

In existing technical literature, have and announce No. I327901 " mat body adjusting system ", I373 including TaiWan, China Patents such as No. 317 " chair know that pad body structure is improved " is the problem of discussing this respect.Wherein, I327901 patents pass through Complicated airbag loop, changes its curvature by chair back protuberance in the way of inflation, is supported the small of the back of occupant, although Certain effect can be reached, but involved great expense, and these inflatable components must be embedded in the chair back, if break down or Producing malfunction will be difficult to overhaul and safeguard.

It is then that multiple cushions are equiped with before the chair back as I373317 patents, the bullet is made by the traction of drawstring Property pad deformation support the back of human body, although structure is relatively simple, but these cushions are still to be covered by foam, such as Fruit is broken down or malfunction, must also be removed foam and be separated with the chair back during maintenance, not only process is complicated, more likely disassembling When cause damage；Furthermore, these cushions are also simply partly supported to human body back, and cause the deflection of the chair back limited, It is difficult to meet the demand of occupant.

Utility model content

The problem of prior art exists jointly be：The mechanism of adjustment chair back curvature be all be embedded in seat back portion and foam it Between, the difficulty overhauled and safeguarded is caused, also easily chair back formation is injured in dismounting；And mechanism design is complicated, manufacture Cost remains high.

The utility model provides a kind of more novel and progressive " the curvature adjusting apparatus of the chair back " design, including one can be bent The chair back scratched, a backrest, a drawstring and a drive mechanism, wherein, the chair back has a fixing end and a movable end, the fixing end It is connected motionless with backrest, movable end is then connected to drawstring；Drawstring has a connection end and a drive end, the connection end and the chair back Movable end is connected, and drive end is then connected to drive mechanism, and the drive mechanism is connected in backrest.

The purpose of this utility model is：Pass through the path of driving mechanisms control drawstring, so that it may so that the curvature production of the chair back Changing and with more patch the back of the body property.Be not only easy to assembly and disassembly, and except drawstring, other mechanisms all in the outside of backrest, More conducively maintenance is with safeguarding.

Further, the backrest has an at least location division, and drawstring is looped around in backrest by the location division.

Further, the position of the location division is relatively higher than drive mechanism.

Further, the drive mechanism has a drive shaft, an operating unit, a sliding block and a position-limiting unit；The operation Unit is located at one end of drive shaft, drive shaft is driven in a rotative pattern, the surface of the drive shaft is spirally connected provided with screw thread with sliding block, sliding Block is connected with the drive end of drawstring, and the sliding block is limited unit and included and by restraining for rotating, and has in position-limiting unit One provides the passage of sliding block shift position.

Further, a fulcrum is socketed with the movable end of the chair back, the connection end of the drawstring is connected on the fulcrum.

Further, the connection end that there is one first perforation to provide the drawstring on the fulcrum is passed through, and on the connection end Block piece that fulcrum comes off is prevented provided with one.

Further, the two opposite sides of the backrest be respectively provided with a strip guide hole provide fulcrum two ends pass through.

Further, the outer cover of the drawstring is provided with sleeve.

Further, the second perforation that an offer drawstring is passed through is offered on the other end of the fulcrum.

Further, the outer cover of the drawstring is provided with sleeve, and sleeve pipe keeps away the disconnected of position having close at second perforation Point, enables fulcrum to be avoided interference with through the sleeve pipe.

As for other detail structures of the present utility model, and produced effect, it refer to embodiment described later and give Describe in detail.

Brief description of the drawings

Fig. 1 is stereo appearance figure of the present utility model.

Fig. 2 is the chair back of the present utility model and the exploded view of backrest.

Fig. 3 is the exploded view of backrest of the present utility model.

Fig. 4 is the enlarged drawing of drive mechanism of the present utility model.

Fig. 5 is the relative initial state of the chair back of the present utility model, mainly shows corresponding between drive mechanism and drawstring Relation.

Fig. 6 is to coordinate Fig. 5, and the relative initial state of the chair back is shown with side visual angle.

Fig. 7 is operation chart of the present utility model, by the operation of drive mechanism, and display drawstring is driven produced by fulcrum Change.

Fig. 8 is to coordinate Fig. 7, the use state after being adjusted with side visual angle display chair back curvature.

Description of reference numerals：

1 chair back

10 fixing ends

11 movable ends

12 fulcrums

120 first perforation

121 second perforation

2 backrests

20 location divisions

21 guide holes

3 drawstrings

30 connection ends

300 block pieces

31 drive ends

32 sleeve pipes

320 breakpoints

4 drive mechanisms

40 drive shafts

400 screw threads

41 operating units

42 sliding blocks

43 position-limiting units

430 passages.

Embodiment

As shown in Figure 1 to 4, the utility model includes a flexible chair back 1, a backrest 2, a drawstring 3 and a driving Mechanism 4, wherein, the chair back 1 has a fixing end 10 and a movable end 11, and the fixing end 10 is connected motionless with backrest 2, movable end 11 are connected to drawstring 3；Drawstring 3 is looped around in backrest 2, with a connection end 30 and a drive end 31, the connection end 30 and chair The movable end 11 of the back of the body 1 is connected, and drive end 31 is then connected to drive mechanism 4, and the drive mechanism 4 is connected in backrest 2；By means of driving Mechanism 4 controls the path of drawstring 3, and the curvature of the chair back 1 can be made to produce change and have more patch back of the body property.

With reference to Fig. 3 and Fig. 4, the drive mechanism 4 has a drive shaft 40, an operating unit 41, a sliding block 42 and a limit Bit location 43；The operating unit 41 is located at one end of drive shaft 40, and drive shaft 40 is driven in a rotative pattern, the drive shaft 40 Surface is spirally connected provided with screw thread 400 with sliding block 42, and sliding block 42 is connected with the drive end 31 of drawstring 3, and the sliding block 42 is limited unit 4 3 include and have a passage 430 for providing the shift position of sliding block 42 by restraining for rotating, and in position-limiting unit 43.During operation, Forcing in operating unit 41 drives drive shaft 40 to rotate, and is screwed onto the sliding block 42 in drive shaft 40 due to by position-limiting unit 43 Restrain and can not rotate, can only according to the transmission of screw thread 400 in passage 430 it is axially displaced, and simultaneously traction drawstring 3 change the chair back The relative position of 1 movable end 11.

It is preferred that, there is at least one location division 20 in the backrest 2, the position of location division 20 is relatively higher than drive mechanism 4 positioning when being looped around the chair back 1 there is provided drawstring 3 are used, and also serve as the branch that drawstring 3 exerts a force when drawing the movable end 11 of the chair back 1 Point；The outer cover of drawstring 3 is provided with sleeve 32 to protect the drawstring 3 to reduce because of the loss that friction is produced.In addition, in the chair back 1 Movable end 11 on be also socketed with a fulcrum 12, the connection end 30 of the drawstring 3 is connected on the fulcrum 12；In the utility model institute In disclosed embodiment, as shown in figure 4, the connection end 30 that there is one first perforation 120 to provide the drawstring 3 on the fulcrum 12 is worn More, block piece 300 that fulcrum 12 comes off, the company of this drawstring 3 and the movable end 11 of the chair back 1 are prevented provided with one and on the connection end 30 Mode is connect, allows fulcrum 12 to produce replaceability, without being damaged to the chair back 1.In addition, also being opened on the other end of fulcrum 12 The second perforation 121 passed through provided with an offer drawstring 3, allows the fulcrum 12 movable freely in drawstring 3；Sleeve pipe 32 then exists There is the breakpoint 320 for keeping away position close at second perforation 121, allow fulcrum 12 to avoid the formation of interference through the sleeve pipe 32.

In order to keep the stability of the movable end 11 of the chair back 1, the guide hole of a strip is respectively provided with the two opposite sides of the backrest 2 The two ends of 21 offer fulcrums 12 are passed through, then fulcrum 12 is socketed on the movable end 11 of the chair back 1, make the movable end 11 of the chair back 1 Path and stroke are restricted；So design, can avoid the movable end 11 of the chair back 1 from arbitrarily being offset in start, and lead The length in hole 21 also limit the stroke of the movable end 11, make the deformation that the chair back 1 will not be allowed excessive.

It is continuous to please also refer to Fig. 5~Fig. 8.In initial state, such as Fig. 5 and Fig. 6, the movable end 11 of the chair back 1 is in relative backrest 2 Low position, the two ends of fulcrum 12 are fallen within the guide hole 21 of the both sides of backrest 2 respectively；During operation, rotating operation unit 41 makes driving Axle 40 is rotated, and is run by means of the screw thread 400 in drive shaft 40 with movable slider 42 in the passage 430 of position-limiting unit 43, as it was previously stated, The position-limiting unit 43 limitation sliding block 42 can not rotate and be forced can only be axially displaced in passage 430, such as Fig. 7, sliding block 42 be from Right side is moved on the left of drawing, and drawstring 3 has also been drawn while displacement and drives its connection end 30.

The connection end 30 of drawstring 3 is connected on fulcrum 12, and drawstring 3 is looped around backrest 2 by means of location division 20, so fulcrum 12 High position is moved to from the relatively low position of guide hole 21, the movable end 11 of the chair back 1 being connected on fulcrum 12 has also been driven certainly, Such as Fig. 8, because the chair back 1 is deflection, so when its fixing end 10 is fixed on backrest 2, the position of its movable end 11 changes Change will force the chair back 1 to deform and change its original curvature, and the adjustment of this curvature, can be with the position of driving sliding block 42 Change and produce change, and fixed immediately when drive shaft 40 stops operating.The curvature of the chair back 1 is adjustable, and can more will meet makes To the requirement of the patch back of the body or Lumbar when user takes, and with more practicality.

Embodiment described above is only the preferred embodiment to absolutely prove the utility model and being lifted, the utility model Protection domain not limited to this.Equivalent substitute or change that those skilled in the art are made on the basis of the utility model Change, within protection domain of the present utility model.For example：In addition to above-mentioned embodiment, drawstring 3 of the present utility model is also It can not be looped around in backrest 2, such as Fig. 8, if the initial state of the chair back 1 is curvature larger state, be drawn by drive mechanism 4 Drawstring 3 can be directly by the movable end 11 of the chair back 1 toward drop-down, and the use state as such as Fig. 6 adjusts the curvature of the chair back 1；Return When multiple, as long as reverse operating drive mechanism 4.

Claims

1. a kind of curvature adjusting apparatus of chair back, including a flexible chair back, a backrest, a drawstring and a drive mechanism, its It is characterised by, the chair back has a fixing end and a movable end, the fixing end is connected motionless with backrest, and movable end is then connected to drawing Rope, drawstring has a connection end and a drive end, and the connection end is connected with the movable end of the chair back, and drive end is then connected to driving machine Structure；By the path of driving mechanisms control drawstring, the curvature of the chair back can be made to produce change.

2. the curvature adjusting apparatus of the chair back according to claim 1, it is characterised in that the backrest is with least one positioning Portion, drawstring is looped around in backrest by the location division.

3. the curvature adjusting apparatus of the chair back according to claim 2, it is characterised in that the position of the location division is relatively higher than Drive mechanism.

4. the curvature adjusting apparatus of the chair back according to claim 1,2 or 3, it is characterised in that the drive mechanism has one Drive shaft, an operating unit, a sliding block and a position-limiting unit；The operating unit is located at one end of drive shaft, in a rotative pattern band Dynamic drive shaft, the surface of the drive shaft is spirally connected provided with screw thread with sliding block, and sliding block is connected with the drive end of drawstring, and the sliding block is limited Bit location includes and has a passage for providing sliding block shift position by restraining for rotating, and in position-limiting unit.

5. the curvature adjusting apparatus of the chair back according to claim 1,2 or 3, it is characterised in that on the movable end of the chair back A fulcrum is socketed with, the connection end of the drawstring is connected on the fulcrum.

6. the curvature adjusting apparatus of the chair back according to claim 5, it is characterised in that there is one first perforation on the fulcrum The connection end for providing the drawstring is passed through, and prevents block piece that fulcrum comes off provided with one on the connection end.

7. the curvature adjusting apparatus of the chair back according to claim 5, it is characterised in that the two opposite sides of the backrest are respectively provided with The two ends that the guide hole of one strip provides fulcrum are passed through.

8. the curvature adjusting apparatus of the chair back according to claim 1,2 or 3, it is characterised in that the outside of the drawstring is arranged There is sleeve.

9. the curvature adjusting apparatus of the chair back according to claim 6, it is characterised in that offered on the other end of the fulcrum The second perforation that one offer drawstring is passed through.

10. the curvature adjusting apparatus of the chair back according to claim 9, it is characterised in that the outer cover of the drawstring is provided with one Sleeve pipe, sleeve pipe is having the breakpoint of keeping away position close at second perforation, fulcrum is avoided interference with through the sleeve pipe.