CN202009873U

CN202009873U - Backrest height adjusting device of office chair

Info

Publication number: CN202009873U
Application number: CN2011200270765U
Authority: CN
Inventors: 陈敬铭
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-27
Filing date: 2011-01-27
Publication date: 2011-10-19
Anticipated expiration: 2021-01-27

Abstract

A backrest height adjusting device of an office chair comprises a seat body, a frame body, a backrest unit and a clamping element, wherein chair legs are arranged on the bottom surface of the seat body; the frame body is L-shaped and the bottom end is pivoted at the rear side of the seat body, and the frame body is opposite to the back of the human body and is provided with an upright section which is parallel laterally and a longitudinal groove is arranged on the front surface or the back surface of the two upright sections; the backrest unit is arranged in the front of the frame body and two sliding sleeves displacing up and down on the upright sections are arranged on the back surface corresponding to the longitudinal groove of the frame body; and the clamping element consists of a clamping body and a torsional spring, and the clamping body is provided with a shaft lever and a crank arranged at the front side of the shaft lever. The backrest height adjusting device can achieve the optimum reclining angle according to the user, tools or buttons are not needed, the adjusting device is provided with a humanized operation interface and is convenient to use, and the angle is elastically swung along with the waist of the user when the adjusting device is arranged at the waist, so as to achieve the most comfortable reclining effect.

Description

The chair back height adjuster of office chair

Technical field

The utility model relates to a kind of at leaning against and waist leans on, and makes it have adjustable height and has the structure that can be positioned predetermined altitude and can descend automatically, relates in particular to a kind of chair back height adjuster of office chair.

Background technology

Existing office chair 10, as shown in Figure 1, on foot rest 11, fix a pedestal 12 to hold up upright support bar with several rollers, pedestal 12 rear ends are then held up to stand a chair back 13 are set, and then consolidate the headrest of an arc streamline moulding with one group of inserted link 14 pivot in the chair back 13 tops.And 15 the height of resting the head on is by the adjustment of inserted link 14 with the chair back 13 fixed positions.But the existing problem points of this kind structure is when people are sitting on the chair, and the dependence best angle of its back and neck is different according to each human body type, demand and impression, and therefore the design of the headrest of existing typing obviously is not inconsistent practicality against this reason.

In like manner, the chair back waist of existing seat is by 16 structures, it is by the chair back 13 inner binding (not shown) that cooperate actuated element, drive the inner frame plate of the chair back indirectly and make telescopic displacement, and because activation point is to be positioned at the chair back 13 sidepieces, it is very big that it is harmed the moulding of seat integral body when using operation on actual assembled, very significantly do not shelve the space and do not use really to account for when unloading; Moreover the waist that is placed on the inner telescopic displacement of the chair back is too small by the telescopic displacement distance that often is subject to driving, and can't reach effect and waist the elasticity strength by prop up of waist by propping up; In addition, the waist that is placed on the chair back 13 inner telescopic displacements leans on, and needs to cooperate extra actuated element, makes telescopic displacement to drive the inner frame plate of the chair back, forms the burden of part and assembly cost.

Be with, this creator is in United States Patent (USP) the 7th, 303,232B1 discloses a kind of " BACKRESTADJUSTING DEVICE FOR OFFICE CHAIRS " in order to improve shortcoming, its structure as shown in Figure 2, its waist that has disclosed a kind of adjustable angle device 17 and that reclines can be adjusted the height and the headrest 18 of depth, takes off problem points on improving, and the effect that can reach expection is promoted.

But look into, leaning against of above-mentioned patent 19 is to be connected and fixed with pedestal 12, and can't adjust its height, so the user still can't adjust to best ergonomics state according to demands of individuals when taking; Hereat, the space of improvement is still arranged.

The utility model content

Technical problem underlying to be solved in the utility model is, overcome the above-mentioned defective that prior art exists, and provide a kind of chair back height adjuster of office chair, it is in leaning against the position, be arranged to do according to user's build, demand and impression height adjustment, to reach the best angle that reclines, and when up adjusting height, it can locate automatically in the precalculated position, and extreme lower position falls back when arriving the extreme higher position automatically, fully must tool using or button, operation-interface with hommization is promoted to reach effect easy to use.It is in waist by the position, be arranged to can be along with user's waist elasticity swing angle, to reach the effect that reclines of the most comfortable.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of chair back height adjuster of office chair is characterized in that, comprising: a pedestal, bottom surface have the chair pin; One support body, generally be the rear side that L type and bottom are hubbed on this pedestal, itself and with respect to the human body back position, have one section and left and rightly be parallel vertical section, and, be provided with a longitudinal fluting in the front or the back side of this two vertical section, and in the middle vertical long convex body that is provided with of this longitudinal fluting, make in this longitudinal fluting and vertically form a long ring-type revolution slideway between long convex body, and, be provided with opening continuous type on the upper side and locate ratchet in this vertical long convex body side wherein; One leans against the unit, is provided in a side of this support body the place ahead, and its back side is provided with two sliding sleeves that can be upper and lower displacement at this vertical section with respect to the longitudinal fluting place of this support body, and this sliding sleeve is provided with an installation hole corresponding to the side of this location ratchet; One blocking element, formed by a fastening convex side and a torsionspring, this fastening convex side has an axostylus axostyle and is located at the crank of this axostylus axostyle front side, and this crank ora terminalis face is provided with a projection that can embed this location ratchet, moreover, this axostylus axostyle rear end is the installation hole that embeds this sliding sleeve, this torsionspring is to be enclosed within on this axostylus axostyle again, and front end is fixed on the ora terminalis face of this crank, and the rear end is the installation hole periphery that is fixed on this sliding sleeve, make the crank of this fastening convex side produce a side direction elastic force according to this, when this sliding sleeve upper and lower displacement, the projection of this crank ora terminalis is that side direction abuts in this vertically side of long convex body, and when rising to the precalculated position, utilizes the elastic force of this torsionspring, this projection is snapped in this location ratchet, and rising to this vertically during long convex body top in this projection, is the respective side along this location ratchet, is without hindrance state and falls naturally; In view of the above, this leans against the unit can adjust upward desired height by lower, and when arriving the extreme higher position, falls back lower automatically, adjusts height again on demand.

The chair back height adjuster of aforesaid office chair, wherein the vertical long convex body top and the root edge of support body are set as skewed guiding cambered surface.

The chair back height adjuster of aforesaid office chair, wherein support body is provided with a parallel long guide channel in the side of this longitudinal fluting, described sliding sleeve is provided with a slide block that can be inserted in corresponding to this long guide channel, makes the described sliding sleeve that leans against the unit be stabilized in length travel on the described support body.

The chair back height adjuster of aforesaid office chair, the sliding sleeve that wherein leans against the unit is by chuck institute be combined in an external jacket and, and these external jacket both sides are connected with and extend to the described cross bar that leans against the unit housing, moreover, after chuck is contained in its installation hole for described torsionspring in being somebody's turn to do, be locked in this external jacket again, to constitute the vertical section of forward and backward double team at this support body.

The chair back height adjuster of aforesaid office chair wherein leans against housing bottom surface, unit and is provided with two spring parts, and articulates down a waist by body in this spring part, and making this waist is pivotal axis by body with the spring part of upper limb, can for elasticity against state.

The chair back height adjuster of aforesaid office chair, wherein the axostylus axostyle of fastening convex side is with the installation hole of anchoring position, a location at described sliding sleeve, making it is that rotate in the axle center with this pilot pin.

The beneficial effects of the utility model are, it is in leaning against the position, be arranged to do according to user's build, demand and impression height adjustment, to reach the best angle that reclines, and it is up adjusted height and the time can locate automatically in the precalculated position, and falls back extreme lower position automatically when arriving the extreme higher position, fully must tool using or button, operation-interface with hommization is promoted to reach effect easy to use.It is in waist by the position, be arranged to can be along with user's waist elasticity swing angle, to reach the effect that reclines of the most comfortable.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the stereoscopic schematic diagram of existing a kind of office chair.

Fig. 2 is the stereoscopic schematic diagram of existing another kind of office chair.

Fig. 3 is the schematic perspective view of the utility model preferred embodiment.

Fig. 4 is another angle schematic perspective view of the utility model preferred embodiment.

Fig. 5 A, Fig. 5 B, Fig. 5 C are that blocking element of the present utility model decomposes and the combination schematic perspective view.

Fig. 6 is the unit schematic perspective view that leans against of the present utility model.

Fig. 6 A is another angle schematic perspective view of interior chuck shown in Figure 6.

Fig. 6 B is a spring part schematic perspective view shown in Figure 6.

Fig. 7 is the cellular construction schematic diagram that leans against of the present utility model.

Fig. 8 is a 8-8 cross-section cutaway view shown in Figure 7.

Fig. 9 is a 9-9 cross-section cutaway view shown in Figure 8.

Figure 10 is a blocking element rising location schematic diagram shown in Figure 9.

Figure 11 is that blocking element shown in Figure 10 rises to schematical top view.

Figure 12 is a blocking element decline schematic diagram shown in Figure 11.

Figure 13 is that the utility model uses the adjustment schematic diagram.

The number in the figure explanation:

20 pedestals

21 chair pin

30 support bodys

31 bottoms

32 vertical sections

33 longitudinal flutings

34 vertical long convex bodys

341,342 guiding cambered surfaces

35 revolution slideways

36 location ratchets

37 long guide channels

40 lean against the unit

41 sliding sleeves

Chuck in the 41a

42 installation holes

421 locating holes

43 slide blocks

44 cross bars

45 housings

46 spring parts

50 blocking elements

511 axostylus axostyles

512 cranks

513 projections

514 axis holes

515 axis holes

52 torsionsprings

53 pilot pins

521 front ends

522 rear ends

60 waists are by body

70 headrests

80 clothes hangers

The specific embodiment

At first, see also Fig. 3～shown in Figure 13, the utility model preferred embodiment includes:

One pedestal 20, the bottom surface has chair pin 21;

One support body 30, generally be the rear side that L type and bottom 31 are hubbed on this pedestal 20, itself and with respect to the human body back position, have one section and left and rightly be parallel vertical section 32, and the front or the back side in this two vertical section 32, be provided with a longitudinal fluting 33, and in the middle of this longitudinal fluting 33, be provided with a vertical long convex body 34, make in this longitudinal fluting 33 and be somebody's turn to do 34 of vertical long convex bodys and form a long ring-type revolution slideway 35, and, be provided with opening continuous type on the upper side and locate ratchet 36 in this vertical long convex body 34 side wherein;

One leans against unit 40, be provided in a side of this support body 30 the place aheads, its back side is provided with two sliding sleeves 41 that can be upper and lower displacement at this vertical section 32 with respect to longitudinal fluting 33 places of this support body 30, and this sliding sleeve 41 is provided with an installation hole 42 corresponding to the side of this location ratchet 36;

One blocking element 50, formed by a fastening convex side 51 and a torsionspring 52, this fastening convex side 51 has an axostylus axostyle 511 and is located at the crank 512 of these axostylus axostyle 511 front sides, and these crank 512 ora terminalis faces are provided with a projection 513 that can embed this location ratchet 36, moreover, these axostylus axostyle 511 rear ends are the installation holes 42 that embed this sliding sleeve 41, in the present embodiment, this axostylus axostyle 511 is provided with an axis hole 515, can stretch into for a pilot pin 53, be located at this installation hole 42, making it is that rotate in the axle center with this pilot pin 53.This torsionspring 52 is to be enclosed within on this axostylus axostyle 511 again, and front end 521 is fixed in the axis hole 514 of this crank 512, and rear end 522 is the locating holes 421 that are fixed on installation hole 42 peripheries of this sliding sleeve 41, make the crank 512 of this fastening convex side 51 produce a side direction elastic force according to this, with when these sliding sleeve 41 upper and lower displacements, the projection 513 of these crank 512 ora terminalis is that side direction abuts in this vertically side of long convex body 34, and when rising to the precalculated position, utilize the elastic force of this torsionspring 52, this projection 513 is snapped in this location ratchet 36, and rise to this vertically during long convex body 34 tops in this projection 513, be respective side, be without hindrance state and fall naturally along this location ratchet 36; In view of the above, this leans against unit 40 can adjust upward desired height by lower, and when arriving the extreme higher position, falls back lower automatically, adjusts height again on demand.

Again, as Fig. 6, shown in Figure 9, this support body 30 is provided with a parallel long guide channel 37 in the side of this longitudinal fluting 33, and this sliding sleeve 41 is provided with a slide block that can be inserted in 43 corresponding to this long guide channel 37, so that this sliding sleeve 41 that leans against unit 40 can be stabilized in length travel on this support body 30.

Moreover, in the present embodiment, this sliding sleeve 41 that leans against unit 40 is by chuck 41b institute be combined in an external jacket 41a and, and this external jacket 41a both sides are connected with the cross bar 44 that extends to this housing that leans against unit 40 45, moreover, should after being contained in its installation hole 42 for this torsionspring 52, be locked in this external jacket 41a again by interior chuck 41b, constitute the vertical section 32 of forward and backward double team according to this at this support body 30.

In addition, as Fig. 6, Fig. 7, shown in Figure 13, this leans against unit housing 45 bottom surfaces and is provided with two spring parts 46, and articulates a waist for 46 times by body 60 in this spring part, so that this waist is pivotal axis by body 60 with the spring part 46 of upper limb, be can for elasticity against and elastic state.Spring part 46 in the present embodiment is made of a curved spring leaf, for example is made of torsionspring but be not limited to this, also can implement.

Further, this leans against 40 tops, unit can be provided with a headrest 70, and the back can connect a clothes hanger 80, but is not limited to this, and promptly it can select to install on demand.

And maximum feature of the present utility model is to be that this leans against the height adjustment structure of unit 40, by above-mentioned technological means, and adjustment mode of the present utility model such as Fig. 9～shown in Figure 13:

At first, as shown in Figure 9, show that leaning against unit 40 is positioned at extreme lower position, this moment, the projection 513 of this blocking element 50 was to be positioned at this vertically root edge of long convex body 34.

Shown in Figure 10, the person of being to use will lean against unit 40 and adjust upward height, when it arrived predetermined altitude, as long as stop, the crank 512 of this blocking element 50 and projection 513 were because of being subjected to the elastic acting force of torsionspring 52 at this moment, therefore can make this projection 513 snap on this location ratchet 36, and because the opening of location ratchet 36 is square on the upper side, so after projection 513 springs into, promptly form the blocking relation, make sliding sleeve 41 can not fall down, but can continue up to adjust height.

Shown in Figure 11, be to show to lean against the schematic diagram that unit 40 transfers to the extreme higher position, at this moment, the crank 512 of blocking element 50 and projection 513 have broken away from the location ratchet 36 in the outside, present and be positioned at this vertically top of long convex body 34, and because vertically the top of long convex body 34 is to be intilted guiding cambered surface 341, therefore projection 513 can import the vertically inboard of long convex body 34 along this guiding cambered surface 341, and because of the revolution slideway 35 of inboard does not have ratchet or any obstruction, so whole sliding sleeve 41 as shown in figure 12, and present the state that nature falls, wait it when falling to minimum point, promptly get back to state shown in Figure 9, and the root edge of vertically long convex body 34 is to form outward-dipping guiding cambered surface 342, makes the projection 513 of this blocking element 50 to adjust upward height again by the outside, therefore, as shown in figure 13, this sliding sleeve 41 can be in the L stroke on this vertical section 32, on, under adjust its height.

Be with, feature of the present utility model, be to be arranged to do according to user's build, demand and impression height adjustment, to reach the best angle that reclines, and it is up adjusted height and the time can locate automatically in the precalculated position, and falls back extreme lower position automatically when arriving the extreme higher position, fully must tool using or button, operation-interface with hommization is promoted to reach effect easy to use.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.

In sum, the utility model is on structural design, use practicality and cost benefit, it is required to meet industry development fully, and the structure that is disclosed also is to have unprecedented innovation structure, have novelty, creativeness, practicality, the regulation that meets relevant novel patent requirement is so mention application in accordance with the law.

Claims

1. the chair back height adjuster of an office chair is characterized in that, comprising:

One pedestal, bottom surface have the chair pin;

One support body, generally be the rear side that L type and bottom are hubbed on this pedestal, itself and with respect to the human body back position, have one section and left and rightly be parallel vertical section, and, be provided with a longitudinal fluting in the front or the back side of this two vertical section, and in the middle vertical long convex body that is provided with of this longitudinal fluting, make in this longitudinal fluting and vertically form a long ring-type revolution slideway between long convex body, and, be provided with opening continuous type on the upper side and locate ratchet in this vertical long convex body side wherein;

One leans against the unit, is provided in a side of this support body the place ahead, and its back side is provided with two sliding sleeves that can be upper and lower displacement at this vertical section with respect to the longitudinal fluting place of this support body, and this sliding sleeve is provided with an installation hole corresponding to the side of this location ratchet;

One blocking element, formed by a fastening convex side and a torsionspring, this fastening convex side has an axostylus axostyle and is located at the crank of this axostylus axostyle front side, and this crank ora terminalis face is provided with a projection that can embed this location ratchet, moreover, this axostylus axostyle rear end is the installation hole that embeds this sliding sleeve, this torsionspring is to be enclosed within on this axostylus axostyle again, and front end is fixed on the ora terminalis face of this crank, and the rear end is the installation hole periphery that is fixed on this sliding sleeve, make the crank of this fastening convex side produce a side direction elastic force according to this, when this sliding sleeve upper and lower displacement, the projection of this crank ora terminalis is that side direction abuts in this vertically side of long convex body, and when rising to the precalculated position, utilizes the elastic force of this torsionspring, this projection is snapped in this location ratchet, and rising to this vertically during long convex body top in this projection, is the respective side along this location ratchet, is without hindrance state and falls naturally; In view of the above, this leans against the unit can adjust upward desired height by lower, and when arriving the extreme higher position, falls back lower automatically, adjusts height again on demand.

2. the chair back height adjuster of office chair according to claim 1, it is characterized in that: the vertical long convex body top and the root edge of described support body are set as skewed guiding cambered surface.

3. the chair back height adjuster of office chair according to claim 1, it is characterized in that: described support body is provided with a parallel long guide channel in the side of this longitudinal fluting, described sliding sleeve is corresponding to this long guide channel, be provided with a slide block that can be inserted in, make the described sliding sleeve that leans against the unit be stabilized in length travel on the described support body.

4. the chair back height adjuster of office chair according to claim 3, it is characterized in that: the described sliding sleeve of unit that leans against is by chuck institute be combined in an external jacket and, and these external jacket both sides are connected with and extend to the described cross bar that leans against the unit housing, moreover, after chuck is contained in its installation hole for described torsionspring in being somebody's turn to do, be locked in this external jacket again, to constitute the vertical section of forward and backward double team at this support body.

5. the chair back height adjuster of office chair according to claim 4, it is characterized in that: the described housing bottom surface, unit that leans against is provided with two spring parts, and articulate down a waist by body in this spring part, making this waist is pivotal axis by body with the spring part of upper limb, can for elasticity against state.

6. the chair back height adjuster of office chair according to claim 1 is characterized in that: the axostylus axostyle of described fastening convex side is with the installation hole of anchoring position, a location at described sliding sleeve, and making it is that rotate in the axle center with this pilot pin.