CN2426310Y

CN2426310Y - Chair backrest with self-adjusting slope structure

Info

Publication number: CN2426310Y
Application number: CN 99258092
Authority: CN
Inventors: 戴东锡
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-12-30
Filing date: 1999-12-30
Publication date: 2001-04-11
Anticipated expiration: 2009-12-30

Abstract

The utility model relates to a chair backrest with a structure which independently adjusts the degree of inclination. The utility model comprises a cushion, a chair backrest and arm rests, wherein the arm rests are fixed on the cushion; a connection block is arranged; the arm rests and the chair backrest are screwed into a whole through screws; a fixing plate is arranged and is screwed on the chair backrest through screws; then a fixing block is arranged and is screwed on the cushion through screws; a fixing piece body extends on one side of the fixing block and is provided with two holes; a screw rod penetrates through the holes; a turnbuckle is arranged to screw the screw rod on the other end of the fixing piece body. The utility model which can independently adjust the degree of inclination of the chair backrest according to each person's different body shape and weight has industrial utility value.

Description

Tool is adjusted the chair back of gradient structure voluntarily

The utility model relates to a kind of parts of chair, relates in particular to the chair back that a kind of tool is adjusted the gradient structure voluntarily.

Tend to cause the situation of having a pain in the back after generally commonly using the chair sitting, this be because, except that the bad human factor of sitting posture, remaining is exactly that chair designs is bad, do not meet ergonomics,, will be urged to spinal cord and produce uncomfortable sensation in case posture remains unchanged for a long time after the sitting.Therefore general seat all is not suitable for sitting.Usually the chair back of commonly using chair all maintains static, though some chair chair back is that to be certain angle of inclination mostly fixing, is not the bodily form design according to everyone, therefore the time of sitting slightly length will feel uncomfortable.As a complete unit,

For example, the people of these normal long-time sittings of clerk and student knows, general chair is suitable uncomfortable, usually cause Muscular stiffness, in the course of time cause health to begin phenomenon dumb and that the action generation is blunt, so use general chair,, be quite unfavorable really for the people of normal seat.

In order to improve the uncomfortable shortcoming of sitting, some chair just increases its pliability, sit down just to produce the sensation that is absorbed in seemingly in the chair, when this kind chair has just begun to sit really as snug as a bug in a rug, but sitting long afterwards can that spinal cord is become be arc because of too soft, even might cause hunchback.

Main purpose of the present utility model is, the chair back that provides a kind of tool to adjust the gradient structure voluntarily can be according to individual's the bodily form and the body weight gradient of adjusting its chair back automatically, makes more comfortable that the user sits.

Secondary objective of the present utility model is; the chair back that provides a kind of tool to adjust the gradient structure voluntarily makes the chair back share the pressure that spinal cord bears, along with the and then motion of moving also of chair back spring; make and above the waist can not protect same posture always, allow the people of sitting can be too in fatigue.

The purpose of this utility model is realized by following technical scheme.

A kind of tool is adjusted the chair back of gradient structure voluntarily, comprise cushion, the chair back and handrail, this handrail is to cooperate nut, screw and it is fixed on the cushion with L shaped iron block, of the present utility model being characterised in that: be provided with connecting block, which is provided with screw, handrail and chair back lock are become one by screw; Be provided with fixed head, which is provided with screw, fixed head is secured on the chair back by screw; Be provided with fixed block again, which is provided with screw, by screw fixed block is secured on the cushion, and a side of fixed block is extended and to be provided with a fixing lamellar body, fixedly lamellar body is provided with two holes, this hole wears for a screw rod, and is provided with a swivel nut and screw rod is fixed at fixedly holding in addition of lamellar body, and the sheathed again spring of this screw rod also passes a top flat and jacking block and penetrate the screw at fixed head top and cooperate another swivel nut and lock.

By said structure, the user is on the seat toward when layback, owing to the chair back is to be that the axle center produces lever action with the connecting block, and impel the fixed head that links the chair back to push away forward, therefore push away and suppress spring before also can causing jacking block simultaneously, and can make screw rod pass fixedly lamellar body and cause the chair back to produce suitable gradient automatically with user's the bodily form, weight.

The purpose of this utility model can also further realize by following technical measures.

Aforesaid tool is adjusted the chair back of gradient structure voluntarily, and the position that this connecting block is locked in the chair back is good with centre to the top end that is positioned at the chair back.

Aforesaid tool is adjusted the chair back of gradient structure voluntarily, also can be provided with a garment bag again and spring and screw rod are wrapped.

For further understanding technology contents of the present utility model, characteristics and effect, exemplify following preferred embodiment now, and conjunction with figs. is described in detail as follows:

Fig. 1 is a decomposition texture schematic diagram of the present utility model.

Fig. 2 is the profile of the utility model when not using.

Profile when Fig. 3 is the utility model use.

Fig. 4 is an overall appearance schematic diagram of the present utility model.

See also Figure 1 and Figure 2 (for ease of narration, so all neither numberings of nut, screw of Yu Wenzhong, only on figure, indicated), the utility model mainly comprises a cushion (10), the chair back (11) and handrail (12), and this handrail (12) is to cooperate nut, screw and it is fixed on the cushion (10) with L shaped iron block (13); Of the present utility model being characterised in that: be provided with a connecting block (20), this connecting block (20) is provided with screw (201), with screw handrail (12) and the chair back (11) are locked and become one, and position the best of locking is positioned at the centre or the top of the chair back (11).Be provided with a fixed head (21), and be provided with screw (211) in fixed head (21) and utilize screw that fixed head (21) is secured on the chair back (11).Be provided with a fixed block (30) again, this fixed block (30) is provided with screw (301) and utilizes screw that fixed block (30) is secured on the cushion (10), and a side of fixed block (30) is extended and to be provided with a fixing lamellar body (31), and fixedly lamellar body (31) is provided with two holes (311), this hole (311) is to wear for a screw rod (32), and be provided with a swivel nut (33) and screw rod (32) be fixed at the end in addition of fixing lamellar body (31), and the sheathed again spring of this screw rod (32) (34), certainly can be provided with a garment bag (35) again and spring (34) is wrapped with screw rod (32), the screw (212) that passes a top flat (36) and a jacking block (361) at last again and penetrate fixed head (21) top cooperates another swivel nut (37) locking, its best presentation graphs as shown in Figure 2, so constitute overall structure of the present utility model, its outward appearance as shown in Figure 4.

The utility model in use, see also shown in Figure 3, when user retaining is against the chair back (11) and during toward layback, because the user is to the chair back (11) application of force, therefore can cause the chair back (11) layback, chair back this moment (11) can be that the axle center produces lever action with connecting block (20), and impel the fixed head (21) that links the chair back (11) to push away forward, therefore also can cause simultaneously that the jacking block (361) of top flat (36) is preceding to push away and press spring (34), and can make screw rod (32) pass the hole (311) of fixing lamellar body (31) and cause the inclination of the chair back (11), again as shown in Figure 3, when the user ends the dependence upon the top chair back (11), its jacking block (361) reinstatement owing to the effect of the elastic-restoring force of spring (34), as shown in Figure 4, and when the user swung back again, its jacking block (361) can be adjusted the degree of depth of compression spring (34) again voluntarily according to the size of layback strength, so can make the bodily form of the chair back with the user, weight produces the gradient that is fit to automatically.

By the above as can be known, the utility model overcomes in use fully commonly uses the existing shortcoming of chair, have firm more and comfortable advantage, can be along with the weight of the individual person is adjusted its gradient automatically, the people of sitting can not produced have a pain in the back, and its structure is quite simple and easy, whole cost is reduced, but can reach best use effect, have the value on the industry.In addition, the utility model can be according to everyone the different bodily forms and body weight owing to having the function of adjusting gradient voluntarily, the chair back is imposed different strength and produces different gradients, and it is quite comfortable that the user feels, and do not have stiff sensation, meet public demand, practical.

In sum, the utlity model has novelty, creativeness, practicality, meet the application important document of novel patent, so file an application in accordance with the law.

Claims

1, a kind of tool is adjusted the chair back of gradient structure voluntarily, comprises cushion, the chair back and handrail, and this handrail is to cooperate nut, screw and it is fixed on the cushion of the present utility model being characterised in that with L shaped iron block:

Be provided with connecting block, which is provided with screw, handrail and chair back lock are become one by screw;

Be provided with fixed head, which is provided with screw, fixed head is secured on the chair back by screw;

Be provided with fixed block again, which is provided with screw, by screw fixed block is secured on the cushion, and a side of fixed block is extended and to be provided with a fixing lamellar body, fixedly lamellar body is provided with two holes, this hole wears for a screw rod, and is provided with a swivel nut and screw rod is fixed at fixedly holding in addition of lamellar body, and the sheathed again spring of this screw rod also passes a top flat and jacking block and penetrate the screw at fixed head top and cooperate another swivel nut and lock.

2, tool according to claim 1 is adjusted the chair back of gradient structure voluntarily, it is characterized in that, the position that described connecting block is locked in the chair back is good with centre to the top end that is positioned at the chair back.

3, tool according to claim 1 is adjusted the chair back of gradient structure voluntarily, it is characterized in that, also can be provided with a garment bag again and spring and screw rod are wrapped.