CN2309746Y

CN2309746Y - Chair with back and forth adjustable back

Info

Publication number: CN2309746Y
Application number: CN 97235136
Authority: CN
Inventors: 虞国基
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-29
Filing date: 1997-07-29
Publication date: 1999-03-10
Anticipated expiration: 2007-07-29

Abstract

The utility model relates to a chair with a back and forth adjustable chair back. The chair with a back and forth adjustable chair back is characterized in that the connecting parts of both sides under a chair back supporting frame of the existing chair and both sides of a chair foot rack are provided with a guide moving device and a positioning device, wherein, the guide moving device is composed of a guide rail pair and pulleys arranged on the guide rail pair; the positioning device is composed of a positioning supporting frame which is arranged on the moveable chair back supporting frame, springs, inserted columns and a positioning plate which is arranged on the chair foot rack or arranged on the guide rail pair of the chair foot rack. The utility model can cause people who sit on the chair to be freely abutted and supported on the chair back at any time, the stress of the waist can be alleviated, and the health of workers and learners who keep the sitting posture for a long time can be effectively protected.

Description

The chair that the chair back can move forward and backward

The utility model relates to the chair that a kind of chair back can move forward and backward, and is a kind of daily necessities.

The maximum difference on function of chair and stool just is to have or not backrest, selects the people of chair, mainly can be by holder for the back on function.But will write on desk or operate with the people of sitting work, study very most of the time, even selected chair for use, back at this moment can not fully obtain by holder.The various style chairs of Chu Shouing no matter be the hard arm-chair of the straight back of the body, still are soft back band chair in the market, and its chair back is all fixed, and when the seat person write on the table or operates, the chair back and seat person broke away from.At this moment, waist muscle is in tension, and the time is slightly long, and the sensation of having a pain in the back is promptly arranged, long-term sitting work learner, and waist is easy to suffer damage, and influences other body parts.Relevant report shows, the heaviest position of human body systemic load is at waist, when generally being grown up sitting posture, the pressure that bears of lumber ertebral disc is about (pressure that bears of lumber ertebral disc is about 20 kilograms during flat crouching) about 270 kilograms, waist is crooked for a long time, might make lumbar vertebrae lateral bending or processus aboralis, if when lumber ertebral disc is outstanding, except that pain in the back, also with diseases such as sciatica and numbness of lower limbs.

In order to write, make when operating the small of the back on the table by holding in the palm in the chair back, must further the fixing chair of the chair back to the table limit, the person's that so just makes the sitting posture both legs are pushed up depths at the bottom of the table by the chair front end, the person's that makes the seat upper body is clamped between an edge and the chair back, the people has by the sensation of bundle folder, because both feet go deep into table down, the writer is difficult to arbitrarily stand, unfavorable work and study, most of people often do not sit like this.

The purpose of this utility model provides the chair that a kind of chair back can move forward and backward, when the seat person will write on the table, the chair back can be shifted to health and fixing, make the small of the back be used to alleviate the pressure that waist bears by holding in the palm in the chair back, when not writing, can original position and fixing will be moved to behind the chair back.

The utility model is achieved in that guiding mobile device and positioner are equipped with in both sides and junction, chair foot rest both sides below original chair chairback brace.

The guiding mobile device of the chair that the chair back can move forward and backward comprises guideway and the pulley that is installed on the guideway, guideway is made up of the fixed guide moving guide rail pair secondary and that be fixed on the chairback brace that is fixed on the chair foot rest, the dual-side bending of fixed guide pair, its cross sectional shape is _, one end is tail one side camber not, its cross section is L, and a side major part of moving guide rail pair bends to

Shape, the curved edges of moving guide rail pair are supported on the pulley that is installed on the fixed guide pair, and the pulley of moving guide rail pair slides on a side curved edges of fixed guide pair, and the chair back on the chair moves forward and backward along guideway is orientable like this.

The guiding mobile device of the chair that the chair back can move forward and backward can also adopt another kind of structure, the mobile device that promptly leads comprises guide rail, roller, roller axle, guide rail is fixed on the chair foot rest, but roller is scroll forward and backward in guide rail, roller axle one end is contained in the roller, and the other end stretches out guide rail and is installed on the chairback brace.

Guiding mobile device and positioner have constituted the chair back and can move forward and backward and locate, positioner comprises location hook, carbine, handle, spring and latch, location hook is contained on the mobile chairback brace, carbine and handle fuse, latch is inserted between carbine and the handle as fulcrum and is fixed on the chair foot rest, spring one end is fixed on the chair foot rest, and the other end ties up on the handle, the interlock mutually of location hook and carbine.

The positioner of the chair that the chair back can move forward and backward also can adopt another kind of structure, this positioner comprises locating support, spring, inserting column and location-plate, locating support is contained on the mobile chairback brace, have the duct on the locating support, inserting column and spring are housed in the duct, spring one end is propped up by the duct convex shoulder, the other end is withstood by the projection on the inserting column, inserting column one end extends for people's operation, the other end is subjected to the spring force effect can eject mobile chairback brace and extend in the locating hole on the location-plate, location-plate is installed on the chair foot rest or is loaded on the guide rail of chair foot rest, has locating hole on the location-plate, perhaps has zigzag location dental lamina on the location-plate.

The advantage of the chair that the utility model chair back can move forward and backward is that the chair back that the personnel that are engaged in desktop work only need regulate chair makes the back of oneself can obtain by holder to the appropriate location, lays oneself open to more comfortable position and reaches the purpose that improves working efficiency thereby make.

Fig. 1 is the utility model embodiment 1 structural representation, Fig. 2 is Fig. 1 left view, Fig. 3 is directed mobile device structural representation, Fig. 4 is the secondary schematic diagram of fixed guide, Fig. 5 is Fig. 4 left view, Fig. 6 is the secondary schematic diagram of moving guide rail, Fig. 7 is Fig. 6 left view, Fig. 8 is the utility model embodiment 2 structural representations, Fig. 9 be among Fig. 8 A-A to cutaway view, Figure 10 be B-B to cutaway view, Figure 11 is the utility model embodiment 3 structural representations, Figure 12 is the utility model embodiment 4 structural representations, Figure 13 be among Figure 12 C-C to cutaway view.

1. chair back among the figure; 2. chairback brace; 3. moving guide rail pair; 4. locating support; 5. spring; 6. inserting column; 7. chair foot rest; 8. location-plate; 9. fixed guide pair; 10. seat cushion; 11. handrail; 12. pulley; 13. handle; 14. spring; 15. carbine; 16. location hook; 17. roller (roller); 18. roller (roller) axle; 19. guide rail; 20. locating hole; 21. latch.

Below in conjunction with drawings and Examples the utility model is described in detail:

Embodiment 1, as Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, shown in Figure 7, the chair that the chair back can move forward and backward is made up of chair foot rest 7, seat cushion 10, chairback brace 2, the chair back 1, and guiding mobile device and positioner are equipped with in the junction of chairback brace both sides, 2 below and chair foot rest 2 both sides.The guiding mobile device comprises guideway and the pulley 12 that is installed on the guideway, guideway is made up of the moving guide rail secondary 3 that is fixed on the fixed guide secondary 9 on the chair foot rest 7 and be fixed on the chairback brace 2, the secondary 9 dual-side bendings of fixed guide, its cross sectional shape is _, near secondary 9 one ends of the fixed guide of pin chair frame 7 rear ends layer one side camber not, another side remains unchanged, and its cross sectional shape is L; One side major part of moving guide rail pair 3 bends to Shape all is equipped with pulley 12 on fixed guide secondary 9 and moving guide rail pair 3, the curved edges of moving guide rail pair 3 is supported on the pulley 12 that is installed on fixed guide pair 9, and the pulley 12 of moving guide rail pair 3 slides on a side curved edges of fixed guide pair 9.Its positioner is by locating support 4, spring 5, inserting column 6 and location-plate 8 are formed, locating support 4 is contained on the mobile chairback brace 2, have the duct on the locating support 4, inserting column 6 and spring 5 are housed in the duct, spring 5 one ends are propped up by the duct convex shoulder, the other end is withstood by the projection on the inserting column 6, inserting column 6 one ends extend for people's operation, the other end is subjected to spring 5 elastic force effects can eject mobile chairback brace 2 and extend into to have in the zigzag dental lamina on the location-plate 8, location-plate 8 is contained on the chair foot rest 7 or is contained on the fixed guide pair 9 of chair foot rest 7, chairback brace 2 regulated at will forward like this, if will retreat or be returned to the origin-location, only need mention inserting column 6 and chairback brace can be return.

Embodiment 2, as Fig. 8, Fig. 9, shown in Figure 10, the guiding mobile device of the chair that the chair back can move forward and backward comprises guide rail 19, roller 17, roller shaft 18, guide rail 19 is fixed on the chair foot rest 7, but roller 17 is scroll forward and backward in guide rail 19, roller shaft 18 1 ends are contained in the roller 17, and the other end stretches out guide rail 19 and is installed on the chairback brace 2.Chairback brace 2 is along with roller 17 can move forward and backward.Positioner comprises location hook 16, handle 13, carbine 15, spring 14 and latch 21, location hook 16 is contained on the mobile chairback brace 2, carbine 15 and handle 13 fuse, latch 21 is inserted between carbine 15 and the handle 13 as fulcrum and is fixed on the chair foot rest 7, spring 14 1 ends are fixed on the chair foot rest 7, the other end ties up on the handle 13, location hook 16 and carbine 15 interlock mutually.When chairback brace 2 moved forward, location hook 16 struck carbine 15 and both mutual interlocks, and then chairback brace 2 is fixed; If will return the time, carrying handle 13 separates two hooks, then chairback brace can after move to original position and be fixed.

Embodiment 3, and as shown in figure 11, in the guiding mobile device of the chair that the utility model chair back can move forward and backward, roller can replace with roller.

Embodiment 4, and is identical among the guiding mobile device of the chair that the utility model chair back can move forward and backward and positioner and the embodiment 1 as shown in Figure 12 and Figure 13, but positioner adopts horizontal level to install, and has locating hole 20 on the location-plate 8; Positioner comprises locating support 4, spring 5, inserting column 6 and location-plate 8, and locating support 4 is contained on the mobile chairback brace 2, and location-plate 8 is installed on the chair foot rest 7 or is contained on the fixed guide pair 9 of chair foot rest 7.

The utility model is not limited in the foregoing description.The positioner of mentioning in embodiment 1 is also applicable to

embodiment

2,3, and the positioner of mentioning in

embodiment

2,3 is also applicable to embodiment 1,4.

The chair that the utility model chair back can move forward and backward makes the seat, and the person can alleviate the stressed of waist widely at any time optionally by holding in the palm in the chair back, has protected long-time sitting work learner's health effectively.

Claims

1. the chair that the chair back can move forward and backward is made up of chair foot rest, seat cushion, chairback brace, the chair back, it is characterized in that there are guiding mobile device and positioner in chairback brace both sides, below and junction, chair foot rest both sides.

2. the chair that the chair back according to claim 1 can move forward and backward, the mobile device that it is characterized in that leading comprises guideway and the pulley that is installed on the guideway, guideway is made up of the fixed guide moving guide rail pair secondary and that be fixed on the chairback brace that is fixed on the chair foot rest, the dual-side bending of fixed guide pair, its cross sectional shape is _, one end is tail one side camber not, and its cross sectional shape is L, and a side major part of moving guide rail pair bends to

Shape, the curved edges of moving guide rail pair are supported on the pulley that is installed on the fixed guide pair, and the pulley of moving guide rail pair slides on a side curved edges of fixed guide pair.

3. the chair that the chair back according to claim 1 can move forward and backward, the mobile device that it is characterized in that leading comprises guide rail, roller, roller axle, guide rail is fixed on the chair foot rest, but roller is scroll forward and backward in guide rail, roller axle one end is contained in the roller, and the other end stretches out guide rail and is installed on the chairback brace.

4. the chair that can move forward and backward according to claim 2 or the 3 described chair back, it is characterized in that positioner comprises location hook, carbine, handle, spring and latch, location hook is contained on the mobile chairback brace, carbine and handle fuse, latch is inserted between carbine and the handle as fulcrum and is fixed on the chair foot rest, spring one end is fixed on the chair foot rest, and the other end ties up on the handle, the interlock mutually of location hook and carbine.

5. the chair that can move forward and backward according to claim 2 or the 3 described chair back, it is characterized in that positioner comprises locating support, spring, inserting column and location-plate, locating support is contained on the mobile chairback brace, have the duct on the locating support, inserting column and spring are housed in the duct, spring one end is propped up by the duct convex shoulder, the other end is withstood by the projection on the inserting column, inserting column one end extends for people's operation, the other end is subjected to the spring force effect can eject mobile chairback brace and extend in the locating hole on the location-plate, location-plate is contained on the chair foot rest or is contained on the guide rail of chair foot rest, has locating hole on the location-plate.

6. the chair that the chair back according to claim 5 can move forward and backward is characterized in that location-plate in the positioner is for having zigzag location dental lamina.