CN102871392A

CN102871392A - Seat base plate

Info

Publication number: CN102871392A
Application number: CN2012103456197A
Authority: CN
Inventors: 陈敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-30
Filing date: 2012-09-18
Publication date: 2013-01-16
Anticipated expiration: 2032-09-18
Also published as: CN202820409U; CN102871392B

Abstract

The invention discloses a seat base plate, which comprises a base plate base which is arranged on the lower side of a seat, wherein chair back connecting parts are arranged on left and right sides of the rear end of the base plate base, and a cavity is formed between the chair back connecting parts; a rear end support part for supporting a backrest is arranged in the cavity; and a front end support plate which extends upwards is arranged at the front end of the base plate base. According to the seat base plate, the base plate is arranged on the seat, and the front end support plate and the rear end support part are connected with the seat and the backrest respectively; and when people sit on the seat and backs lean back, the dynamics of the seat and the backrest and the tilting angle of the backrest are adjusted by utilizing the front end support plate and the rear end support part, so that legs of human bodies face backwards, the lower sides of the legs are stressed, the backs lean back, the human bodies are stressed synchronously to be in the optimum stressed state, and users are more comfortable when sitting on the seat.

Description

A kind of Chair underframe

Technical field

The present invention relates to a kind of chair accessory, particularly a kind of Chair underframe.

Background technology

At present, common seat comprises the seat on the market, backrest, be provided with the chassis that is connected with backrest with the seat in seat bottom, horizontal elastic component is housed in base, as shown in Figure 1, when the people sits on the seat, when the back leans against the backrest layback, the chassis of this structure can drive the seat and move forward a little, backrest tilts towards the back lower place, and human body is when the back tilts to the back lower place, shank but because in order to keep balance to reach, make human body stressed inharmonious at back and shank, the subconsciousness of this process and human body is relevant with the structure of seat itself, makes the people not reach best stressed effect when taking seat, be difficult to meet the ergonomics theory, increase people's sense of fatigue, therefore for above-mentioned shortcoming, be necessary to make improvement.

Summary of the invention

In order to overcome the deficiencies in the prior art, the invention provides a kind of rational in infrastructure, make the people sit on the seat more comfortable, the Chair underframe that meets ergonomics.

The technical solution adopted for the present invention to solve the technical problems is:

A kind of Chair underframe, comprise the subbase that is installed under the seat, arranged on left and right sides is provided with chair back connecting portion in the subbase rear end, form cavity between the described chair back connecting portion, be provided with in cavity for the support portion, rear end of supporting the chair back, described subbase front end also is provided with the front end gripper shoe that is used for supporting seat support of extending towards the top.

As a preference, the front end of described subbase is provided with the front end trunnion axis, described front end gripper shoe is sleeved on the front end trunnion axis, described front end trunnion axis also is set with the front end torsion spring, one end of this front end torsion spring withstands the rear side of front end gripper shoe, the other end of described front end torsion spring is pressed in the upside of subbase, before the described chair back connecting portion, the rear portion is respectively arranged with chair back trunnion axis and support portion, rear end, rear end at chair back connecting portion has chute, support portion, described rear end is enclosed within the chute, be set with the rear end torsion spring on this chair back trunnion axis, an end of this rear end torsion spring withstands on the downside of support portion, rear end, and the other end is fixed on the upper of subbase.

For the guarantor takes the backward turn of rear front end gripper shoe, the horizontal line of described front end gripper shoe and subbase forms the acute angle of a directed forward.

For the ease of adjusting the degree of tightness of rear end torsion spring, the centre of described subbase is equipped with lifting screw, wherein the lower end of this lifting screw is passed subbase and is equipped with and increases nut, the upper end of described lifting screw is equipped with setscrew nut, one end of described setscrew nut is provided be used to the torsion spring fixture block that blocks the rear end torsion spring, adjusts the holding capacity of backrest by the degree of tightness of adjusting the rear end torsion spring.

More convenient for the installation that makes torsion spring, the shape of described front end torsion spring and rear end torsion spring is designed to U-shaped double end shape, sealing short side part place in the middle of subbase in the middle of wherein said front end torsion spring and the rear end torsion spring.

More convenient for the installation that makes the rear end torsion spring, described torsion spring fixture block is set to recessed fan-shaped half slot shape.

In order to make the front end gripper shoe be more prone to backward turn, the shape of described front end gripper shoe is designed to S word shape, makes the front end gripper shoe bear more multidirectional rear active force.

In order to reduce the wearing and tearing of parts, be provided with planchet cylinder group between described front end trunnion axis, chair back trunnion axis, support portion, rear end and the torsion spring.

In order further to reduce the wearing and tearing of parts, described planchet cylinder group is provided with guard ring by a middle side.

The invention has the beneficial effects as follows: be installed on the seat by the chassis with invention, front end gripper shoe, support portion, rear end are connected with backrest with the seat respectively, when the people sits on the seat, during the layback of back, utilize front end gripper shoe, support portion, rear end to adjust the dynamics of seat and backrest and the elevation angle of backrest, make the human body shank backwards, the below is stressed, the back realizes that towards the back lower place reclining human body stress is synchronous, reach best stress, thereby it is more comfortable on the seat to allow the user sit.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the stressed schematic diagram of prior art;

Fig. 2 is stereogram of the present invention;

Fig. 3 is partial sectional view of the present invention;

Fig. 4 is STRUCTURE DECOMPOSITION figure of the present invention;

Fig. 5, Fig. 6 are work schematic diagrames of the present invention.

The specific embodiment

With reference to Fig. 2, Fig. 3, Fig. 4.A kind of Chair underframe, comprise the subbase 1 that is installed under the seat, the front end of described subbase 1 is provided with front end trunnion axis 2, this front end trunnion axis 2 is set with front end gripper shoe 21 and the front end torsion spring 22 that extends towards the top, one end of this front end torsion spring 22 withstands the rear side of front end gripper shoe 21, the other end of front end torsion spring 22 is pressed in the upside of subbase 1, front end gripper shoe 21 is used for being connected with the seat, the shape of wherein said front end gripper shoe 21 is designed to S word shape, the horizontal line of front end gripper shoe 21 and subbase 1 forms the acute angle of a directed forward, guarantee front end gripper shoe 21 backward turn when being subject to the pressure that the people takes, and provide counterclockwise forward thrust by front end torsion spring 22 forward end gripper shoes 21.The rear portion of described subbase 1 is left, right two ends are provided with chair back connecting portion 3, form cavity between the described chair back connecting portion 3, before between the described chair back connecting portion 3 in the cavity, the rear portion is respectively arranged with chair back trunnion axis 31 and support portion, rear end 32, the rear end of wherein said chair back connecting portion 3 has chute 33, support portion, described rear end 32 is enclosed within 33 li of chutes, be set with rear end torsion spring 34 on this chair back trunnion axis 31, one end of this rear end torsion spring 34 withstands on the downside of support portion, rear end 32, the other end is fixed on the upper of subbase 1, support portion, rear end 32 is used for being connected with backrest, provides the thrust that makes progress counterclockwise in support portion 32 to the back-end by rear end torsion spring 34.For the installation that makes torsion spring more convenient, the shape of described front end torsion spring 22 and rear end torsion spring 34 is designed to U-shaped double end shape, sealing short side part place in the middle of subbase 1 in the middle of wherein said front end torsion spring 22 and the rear end torsion spring 34, front end torsion spring 22 and rear end torsion spring 34 one of each needs can guarantee result of use like this, and the front end torsion spring 22 of this shape and rear end torsion spring 34 are also more convenient when mounted.

It is worth mentioning that, although the application's preference adopts the torsion spring mode to provide support power, can reach best stressed effect according to the method described above, but in fact, front end gripper shoe 21 and support portion, rear end 32 can also adopt direct fixing or other fixture to be installed in the mode of subbase 1; The application's front end torsion spring 22 and rear end torsion spring 34 use proving effect better with reality by experiment in addition; but actual also have other according to method; for example an end of rear end torsion spring 34 is fixed on the upside of support portion, rear end 32; the other end is fixed on the downside of subbase 1; change like that can reach same or similar technique effect equally, belongs to equally within the application's the protection domain.

The centre of described subbase 1 is equipped with lifting screw 4, wherein the lower end of this lifting screw 4 is passed subbase 1 and is equipped with and increases nut 41, the upper end of described lifting screw 41 is equipped with setscrew nut 42, one end of described setscrew nut 42 is provided with torsion spring fixture block 43, wherein said torsion spring fixture block 43 is set to recessed fan-shaped half slot shape, the half slot shape place that torsion spring 34 needs in rear end are stuck in torsion spring fixture block 43 gets final product, thereby and by the degree of tightness that nut 41 is adjusted the height control rear end torsion spring 34 of setscrew nut 42 that increases under the turn subbase 1, thereby the thrust of control backrest.

Be provided with planchet cylinder group 5 between described front end trunnion axis 2, chair back trunnion axis 31, support portion, rear end 32 and the torsion spring, described planchet cylinder group 5 is provided with guard ring 51 by a middle side, can play and reduce front end trunnion axis 2, chair back trunnion axis 31, support portion, rear end 32 and torsion spring fretting wear.Wherein guard ring 51 also plays the wearing and tearing that reduce between guard ring 51 and the subbase 1.

When reality is used, with reference to Fig. 5, Fig. 6.Be installed on the seat by the chassis with the application, front end gripper shoe 21 is connected with the support portion, rear end respectively to be connected with backrest with seat 20 is connected, when the people sits on the seat, when swing back in the back, backward turn of front end gripper shoe 21, front end torsion spring 22 then provides support power to front end gripper shoe 21, backrest 30 drive support portions, rear end 32 press down simultaneously, utilize front end gripper shoe 21 and support portion, rear end 32 to adjust the dynamics of seat 20 and backrest 30 and the elevation angle of backrest 30, make the human body shank backwards, the below is stressed, the back is towards back lower place reclining, realize that the human body stress is synchronous, reach best stress, thereby it is more comfortable on the seat to allow the user sit.

The present invention by rational architecture advances, that the people is sat is more comfortable and meet ergonomics on the seat, it is a kind of chassis that is widely used on the seat, after former messenger takes and swings back, because seat stress and deformation, shank because in order to keep balance to reach, human body then is subject to back and two reciprocal pulling force of shank thereupon, make human body at back and the stressed inharmonic undesirable condition of shank, and the force-bearing situation of improvement of the present invention when taking in conjunction with the people, realize that the human body stress is synchronous, the people is taken more comfortable.

Claims

1. Chair underframe, comprise the subbase (1) that is installed under the seat, it is characterized in that: arranged on left and right sides is provided with chair back connecting portion (3) in subbase (1) rear end, form cavity between the described chair back connecting portion (3), be provided with in cavity for the support portion, rear end (32) of supporting the chair back, described subbase (1) front end also is provided with the front end gripper shoe (21) that is used for supporting seat support of extending towards the top.

2. a kind of Chair underframe according to claim 1, it is characterized in that: the front end of described subbase (1) is provided with front end trunnion axis (2), described front end gripper shoe (21) is sleeved on the front end trunnion axis (2), described front end trunnion axis (2) also is set with front end torsion spring (22), one end of this front end torsion spring (22) withstands the rear side of front end gripper shoe (21), the other end of described front end torsion spring (22) is pressed in the upside of subbase (1), before the described chair back connecting portion (3), the rear portion is respectively arranged with chair back trunnion axis (31) and support portion, rear end (32), have chute (33) in the rear end of chair back connecting portion (3), it is inner that support portion, described rear end (32) is enclosed within chute (33), be set with rear end torsion spring (34) on this chair back trunnion axis (31), one end of this rear end torsion spring (34) withstands on the downside of support portion, rear end (32), and the other end is fixed on the upper of subbase (1).

3. a kind of Chair underframe according to claim 1 is characterized in that: the acute angle of a directed forward of horizontal line formation of described front end gripper shoe (21) and subbase (1).

4. a kind of Chair underframe according to claim 2, it is characterized in that: the centre of described subbase (1) is equipped with lifting screw (4), wherein the lower end of this lifting screw (4) is passed subbase (1) and is equipped with and increases nut (41), the upper end of described lifting screw (41) is equipped with setscrew nut (42), and an end of described setscrew nut (42) is provided be used to the torsion spring fixture block (43) that blocks rear end torsion spring (34).

5. a kind of Chair underframe according to claim 2, it is characterized in that: the shape of described front end torsion spring (22) and rear end torsion spring (34) is designed to U-shaped double end shape, sealing short side part place in the middle of subbase (1) in the middle of wherein said front end torsion spring (22) and the rear end torsion spring (34).

6. a kind of Chair underframe according to claim 4, it is characterized in that: described torsion spring fixture block (43) is set to recessed fan-shaped half slot shape.

7. a kind of Chair underframe according to claim 1, it is characterized in that: the shape of described front end gripper shoe (21) is designed to S word shape.

8. a kind of Chair underframe according to claim 2 is characterized in that: be provided with planchet cylinder group (5) between described front end trunnion axis (2), chair back trunnion axis (31), support portion, rear end (32) and the torsion spring.

9. a kind of Chair underframe according to claim 8 is characterized in that: described planchet cylinder group (5) is provided with guard ring (51) by a middle side.