CN2812707Y

CN2812707Y - Regulating structure for back of chair

Info

Publication number: CN2812707Y
Application number: CN 200520112701
Authority: CN
Inventors: 许龙湶
Original assignee: SHUANGLONGXING COMMERCE AND INDUSTRY FACTORY Co Ltd
Current assignee: SHUANGLONGXING COMMERCE AND INDUSTRY FACTORY Co Ltd
Priority date: 2005-06-22
Filing date: 2005-06-22
Publication date: 2006-09-06
Anticipated expiration: 2015-06-22

Abstract

The utility model discloses a regulating structure for chair backs of chairs, which comprises a base, a chair back, a regulating unit and a connection rod, wherein the chair back comprises a rod of the chair back pivoted on the base; the regulating unit comprises a worm, a worm gear and a fixing base; the fixing base corresponding to the chair back is arranged on the base; the worm is penetrated and pivoted on the fixing base; the worm gear pivoted on the fixing base is engaged with the worm; a connecting rod comprises two end parts, wherein one end part is pivoted with the rod of the chair back, the other end part is connected with the worm gear of the regulating unit. The combination of the worm and the worm gear of the regulating unit can be stepless and accurate regulation to angles of the chair back.

Description

The chair back adjustment structure of seat

Technical field

The utility model relates to a kind of chair back adjustment structure of seat.

Background technology

In the armchair structure of general body-building apparatus, the chair back in its seat need be looked occupant's difference mostly and adjust the angle of inclination of the chair back, and it mainly is to utilize an air pressure rod to be arranged on the cushion bottom of seat, this air pressure rod and chair back interlock, and see through pressure release and the pressurising that an adjustment handle is controlled this air pressure rod, in order to adjust the angle of inclination of the chair back; And can after being adjusted to the location, the chair back can the chair back be located through the mode of locking air pressure rod.

The above-mentioned chair-back adjusting device of detailed sight is not difficult to realize that it mainly is to utilize air pressure rod to be adjusted leaning forward or swinging back of the chair back in fact, and when the chair back is adjusted to the location, utilizes the mode of locking air pressure rod to be located; Yet the mode that this kind utilizes air pressure rod to adjust is to measure the gradient that it is approximately adjusted the chair back according to the occupant fully, suitable fast of the speed of its air pressure rod pressurising and pressure release; Therefore on reality is adjusted, not being that the chair back too tilts, is exactly adjusted angle of inclination deficiency, very is difficult to be affectedly bashful the angle of inclination size of the chair back.

The utility model content

The purpose of this utility model is to provide a kind of chair back adjustment structure of seat, and it can reach the accurate adjustment of stepless in the adjustment of the chair back, and the adjustment angle of the chair back demand of more pressing close to the user.

For achieving the above object, technical solution of the present utility model is:

A kind of chair back adjustment structure of seat comprises: a base; One chair back, it comprises that one is hubbed at the chair back bar on the base; One adjustment unit, it comprises a worm screw, a worm gear and a holder, the relative chair back of this holder and being arranged on the base, worm screw then stretch through be articulated on the holder and with the worm screw bridle joint; One connecting rod, it comprises two ends, and wherein an end and chair back rod end articulate, and the other end then joins with the worm gear of adjustment unit.

The chair back adjustment structure of described seat, it more comprises an extension rod, and this extension rod one end is fixedly arranged on the worm gear face, and the other end then is articulated in interlinking lever end.

The holder of this adjustment unit is provided with positioning piece and makes its location with the restriction worm screw.

This worm screw is provided with the rotating part that can control the worm screw turn, and this rotating part stretches outside holder.

After adopting such scheme, because the utility model is provided with worm screw and worm gear on adjustment unit, therefore can reach stepless accurately adjusts chair back angle, makes it more press close to user's demand; And the chair back reaches the effect of the fastening position of stopping through the check of worm screw and worm gear; Have rapid operation, lower-cost advantage simultaneously.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of the utility model adjustment unit;

Fig. 3 is an action schematic diagram of the present utility model;

Fig. 4 is the structural representation of another example of the utility model;

Fig. 5 is the schematic diagram that the utility model applies to body-building apparatus.

The primary clustering symbol description

1 base, 11 seat supports, 2 chair back

21 chair back bars, 3 adjustment units, 31 worm screws

311 wrom tooths, 312 rotating parts, 32 worm gears

321 gear teeth, 33 holders, 34 keepers

42 ends, 4 connecting rods, 41 ends

5 extension rods, 6 body-building apparatus A pivoting points

The specific embodiment

As shown in Figure 1, 2, the chair back adjustment of seat structure comprises in this example:

One base 1, base 1 is provided with seat support 11;

One chair back 2, it comprises a chair back bar 21 and is hubbed on the base 1 and forms on the pivoting point A, and stretches the part rod end to base 1 bottom;

One adjustment unit 3, it comprises a worm screw 31, a worm gear 32 and a holder 33, wherein:

This holder 33 relative chair back 2 and be arranged at base 1 bottom are for worm screw 31 oblique being arranged on the holder 33;

This worm screw 31 is provided with minority wrom tooth 311, and the wherein end of worm screw 31 is extended through on the keeper 34, deviate from outside the holder 33 to prevent worm screw 31, and the effect that is provided a restriction to locate, on reality is implemented, this keeper 34 also can be a clasp, a latch or is arranged at the assembly that all kinds like this such as trip on the worm screw 31 are located, and it all can reach the effect that restriction worm screw 31 is deviate from holder 33; Again, the other end of worm screw 31 then stretches outside holder 33 and is installed with a rotating part 312, this rotating part 312 and worm screw 31 interlocks, and as the usefulness of external control worm screw 31 turns;

This worm gear 32 is taken turns and is provided with the gear teeth 321 week, its directly be hubbed on the holder 33 and with the wrom tooth 311 mutual bridle joints of worm screw 31;

One connecting rod 4, it comprises two

ends

41,42, and wherein an end 41 articulates with the end that chair back bar 21 extends in

base

1, and 42 of the other end are articulated on worm gear 32 wheel faces of adjustment unit 3.

When adjusting enforcement, as shown in Figure 3, the user is the rotating part 312 of turn and worm screw 31 interlocks directly, worm screw 31 can be rotated in holder 33, and with worm gear 32 rotations of 311 drives of the wrom tooth on its bar with its engagement, seeing through worm gear 32 rotations can slightly be offset connecting rod 4 with the rotation of worm gear 32, with horizontal pulling or promotion chair back bar 21, making chair back bar 21 be articulated in pivoting point on the base 1 with it is center and seat support 11 wing drop forward or backward slowly relatively, no matter be that the chair back 2 leans forward or swings back, in operation, all need not manually to adjust again chair back bar 21, suitable convenience in the operation.

Owing to only establish tool minority wrom tooth 311 on this worm screw 31, so it is suitable laborsaving when turn worm screw 31, and factor because of wrom tooth 311 with the gear teeth 321 gear ratios of worm gear 32 of worm screw 31, worm gear 32 will slowly be rotated, and then make the chair back 2 can slowly adjust its gradient, be adjusted to the required angle of chair back bar 21 to reach stepless.

In addition, what deserves to be mentioned is, this chair back bar 21 is after being adjusted to required angle, because this adjustment unit 3 is the combination of worm gear 32 and worm screw 31, so this chair back bar 21 can see through worm gear 32 and obtain a reverse effect of stopping and ending,, also can not see through chair back bar 21 and oppositely promote connecting rods 4 even when manually pulling this chair back bar 21, and worm gear 32 and worm screw 31 are rotated, its locating effect is quite good.

Again, as shown in Figure 4, be another preferred embodiments of the present utility model, in this example except that the base 1 that comprises above-mentioned example, the chair back 2, adjustment unit 3 and connecting rod 4, can further comprise an extension rod 5, these extension rod 5 one ends are fixedly arranged on 32 on the worm gear, and the other end then is articulated on the connecting rod 4, and connecting rod 4 one ends 41 are still the pivot joint of keeping with

chair back bar

21, and 42 of the other end and this extension rod 5 articulate mutually.

When adjusting the chair back 2 angles of inclination, the user can this be arranged at the rotating part 312 on the worm screw 31 through turn, make the wrom tooth 311 of its turn worm screw 31 drive worm gear 32 rotations, because this extension rod 5 is arranged on the worm gear 32, so when worm gear 32 rotates suitable angle, can drive end 42 skews that this extension rod 5 is connected with connecting rod 4, and then drive this connecting rod 4 and laterally move, and make it drive chair back bar 21 and be that pivot is adjusted suitable angle with its pivoting point A that is articulated on the base 1.

What deserves to be mentioned is, the chair back adjustment structure that the utility model is taken off removes and can apply on the general seat, also can be as shown in Figure 5, apply on the seat of body-building apparatus 6, the rotating part 312 that sees through the 1 bottom projection of turn base gives turn worm screw 31, make it drive worm gear 32 and rotate, and then interlock connecting rod 4 drives the chair back 2 and tilt forward or backward, be beneficial to adjust the various chair back 2 angles.

Claims

1, a kind of chair back adjustment of seat structure comprises:

One base;

One chair back, it comprises that one is hubbed at the chair back bar on the base;

One adjustment unit, it comprises a worm screw, a worm gear and a holder, the relative chair back of this holder and being arranged on the base, worm screw then stretch through be articulated on the holder and with the worm screw bridle joint;

One connecting rod, it comprises two ends, and wherein an end and chair back rod end articulate, and the other end then joins with the worm gear of adjustment unit.

2, the chair back adjustment of seat is constructed according to claim 1, and it is characterized in that: it more comprises an extension rod, and this extension rod one end is fixedly arranged on the worm gear face, and the other end then is articulated in interlinking lever end.

3, the chair back adjustment of seat is constructed according to claim 1, it is characterized in that: the holder of this adjustment unit is provided with positioning piece and makes its location with the restriction worm screw.

4, the chair back adjustment of seat structure according to claim 1 is characterized in that: this worm screw is provided with the rotating part that can control the worm screw turn, and this rotating part stretches outside holder.