TWM493934U - Elastic leaning adjustment apparatus for chair backrest - Google Patents

Description

Chair back elastic adjustment device

The present invention relates to a spring-loaded pull-up seat and a seat-back fixing seat which are pivotally clamped between the front and rear sides of the base of the chair, respectively, and are held under the end of the spring-tight pull-up seat. The base of the corresponding portion is provided with two corresponding upper and lower abutting members which are mutually abutting obliquely facing surfaces, and the front side of the lower abutting member is rotated by the operating rod band, and the lower abutting member has Corresponding to the fitting of the tooth portion, the rotation of the through-fitting member pushes the lower abutting member to displace, and the upper abutting member is pushed upward, thereby causing the spring to pull the hanging seat to swing and tighten the spring tightly, so that The back of the seat back is more tightly pressed.

The well-known office chair backs are equipped with elastic reclining devices, such as Taiwan's TWI429411 (B), TWM395420 (U), TWM321261 (U) and M480321 (ie CN201320493667 in the mainland) and other patents. The spring pulls or bears against the lower end of the swinging chair back, and the elastic compression force of the spring allows the seat back to have a resilient rest, and at the same time, their operating methods have a common point, that is, through a rotatable screw. The displacement of the sliding element or the oscillating element is driven by the upper thread to cause compression or retraction of the spring, so that the restoring force of the spring changes, thereby causing the seat back to have a different elastic tightness.

Although the screw adjustment method can perform the elastic adjustment of the stepless elastic tightness, in fact, there is no segmental adjustment function, in actual application, if only the rotating screw 2~3 When the circle is used, the slight compression or release effect of the spring does not give the occupant a feeling of tightness change of the chair back. It is often necessary to rotate the screw for more than 5 times, and the occupant will feel the seat back. The elasticity of the bullet is tightened or loosened. After the test is adjusted, the occupant may not be able to remember the number of rotations of the screw. The next time you want to re-adjust it, the test will be repeated and the adjustment will be repeated. Inconvenience.

In addition, the adjustment of the elasticity of the chair back is determined by the number of turns of the screw rotation, but the screw must be rotated when adjusted to feel the change of the elasticity or the change of the tightness. More laps result in the operator having to rotate the screw continuously, causing the operator to have to work harder and time-consuming to adjust, so the application and operation of such adjustment methods are less in line with the actual experience of the operator.

The reason is that in order to improve the aforementioned stepless adjustment of the screw of the known seatback resilient device, it is not possible to quickly adjust the tightness of the back of the seat back to meet the individual needs, and the problem of adjusting the operation time and labor is troublesome. A rear side of the base is pivoted to a seat back mount for the seat back, and a lower end of the spring tension pull bracket is pivoted to the front side of the base, and the seat back mount and the spring tight pull mount are a spring that is relatively pulled between the middle portions of the person, and at the same time, the base of the base below the other end of the spring-loaded pull-up seat is provided with upper and lower abutting members having corresponding opposite abutting faces, and The upper end of the abutting member abuts against the corresponding swinging end of the spring tensioning bracket, and then the lower abutting member is provided with a tooth portion which is rotated by the operating rod band and has a corresponding fitting with the lower abutting member. The fitting member is configured to push or release the displacement of the lower abutting member through the rotating fitting member, thereby driving the upper and lower movement of the upper abutting member to cause the spring to pull the hanging seat back and forth, and the spring to the seat back fixing seat Producing different tensions, so that the back of the seat back can be tightly tightened. Change and get adjusted.

The technical solution adopted by the present invention to solve the technical problem is as follows: a seat back seat for mounting a seat back on a rear side of a base mounted on an air pressure bar of an office chair, and the seat back mount is subjected to a spring Pulling the back of the seat to create a forward resilient abutment, and the front side of the base is pivoted to the end of a spring-loaded pull-tab, and the other end of the spring of the pull-back seat mount is tight In the middle of the spring tensioning susceptor, the base of the other end of the spring tensioning yoke is provided with upper and lower abutting members which abut against the slanting surface, and the upper end of the upper abutting member is pressed against the spring. The corresponding end of the lower splicing seat is fastened, and the side of the lower abutting member and the fitting member also received in the base are abutted, and the two parts are mutually coupled to each other by the rotation of the fitting member. Or the tooth portion of the tooth top abutting, the lower abutting member is displaced to move the upper abutting member up and down, thereby driving the spring to pull the seat and swinging forward and backward, and driving the spring to adjust the tension of the seat back fixing seat. .

In the above solution, the base is provided with a receiving groove for receiving the upper and lower abutting members, and guiding the lower abutting member to guide the sliding and the upper abutting member to guide the sliding.

In the above solution, the back side of the upper abutting member is provided with a concave guiding groove, and a corresponding convex portion is provided on the wall of the corresponding receiving groove.

In the above solution, the convex guiding portion and the concave guiding groove corresponding to the sliding contact between the upper abutting member and the lower abutting member are provided.

In the above solution, the top and the valley of the tooth portion of the fitting portion and the lower abutting member are provided with convex portions and concave portions which are mutually fitted and can be positioned.

In the above solution, the outer side of the fitting member is provided with a recessed groove, and an operating rod is disposed on the outer side of the base member to penetrate the fitting member and the lower abutting member, and a radial fitting is disposed on the operating rod. A fitting rod in the recessed groove.

Therefore, the rotation of the fitting member is caused by the rotation operation of the above-mentioned new operation lever, To push or release the lower abutting piece to generate the front and rear displacement, thereby driving the upper abutting piece to move up and down to push the spring to pull the hanging seat to swing, so that the spring has different tension tension on the seat back fixing seat, The adjustment of the tightness of the back of the chair is adjusted, so that the adjustment operation is simplified, and the occupant feels more comfortable with the tightness of the back of the chair.

1‧‧‧Base

11‧‧‧ 容容

12‧‧‧ convex guide

2‧‧‧Back seat holder

20‧‧‧hanging rod

3‧‧‧Spring tight pull pedestal

30‧‧‧ pivot

31‧‧‧ hanging slot

32‧‧‧ bottom

4‧‧‧ Spring

5‧‧‧Upper parts

51‧‧‧ Oblique face

52‧‧‧ convex guide

53‧‧‧ concave guide groove

6‧‧‧Next part

61‧‧‧ obliquely

62‧‧‧ concave guide groove

63‧‧‧ teeth

64‧‧‧ convex

7‧‧‧ fittings

71‧‧‧ teeth

72‧‧‧ recess

73‧‧‧Inlay

8‧‧‧Operator

81‧‧‧Fiing rod

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Figure 1 is a schematic perspective view of the present invention.

2 is a perspective exploded view of the present invention.

3 is an exploded perspective view of the present type of spring adjustment device.

4 is a perspective view showing the other direction of the fitting of the present type of spring adjusting device.

Fig. 5 is a front cross-sectional view showing the elastic adjusting device of the present invention.

Fig. 6 is a side cross-sectional view showing the elastic adjusting device of the present invention.

Fig. 7 is a schematic view showing the operation of the operating lever of the present type of springing adjustment device being pushed inward.

Fig. 8 is a schematic view showing the state of the spring pulled by the operating lever of the present type of the elastic adjusting device.

Referring to FIG. 1 and FIG. 2, the present invention comprises a bottom end for a pneumatic rod mounted on a leg, and a front and a side for a seat 1 and a seat back, respectively, and a type L is provided. One end of the seat back mount 2 is pivotally fixed at the rear side of the base 1, and the other end is for mounting a fixed seat back, and another end of the L-shaped spring tension pull mount 3 is provided. a pivot rod 30 is pivotally fixed to the front side of the base 1, and then between the hanging rod 20 which is inserted in the middle of the seat back fixing base 2 and the hanging slot 31 at the middle of the spring tensioning hanging seat 3, two of them are suspended. The spring 4, which is pulled tightly by the end, causes the seat back mount 2 and the spring tension pull mount 3 to swing inwardly relative to each other.

In addition, as shown in FIG. 3 and FIG. 5 to FIG. 6 , a cavity 11 is disposed on the base 1 corresponding to the bottom surface 32 of the other end of the spring tensioning hanger 3, and the contents of the cavity 11 are stacked. The upper abutting member 5 and the lower abutting member 6 are abutted together, and the upper abutting member 5 and the lower abutting member 6 are opposite to each other at the opposite angles 51 and 61, and at the same time A concave guiding groove 62 and a convex guiding portion 52 which can be mutually engaged and guided to each other are disposed between the abutting surfaces 51, 61, and the upper end of the upper abutting member 5 abuts against the bottom surface 32 of the corresponding end of the spring tensioning hanging seat 3. Further, between the rear side of the upper abutting member 5 and the wall surface of the receiving groove 11, there are also concave guiding grooves 53 and convex guiding portions 12 which can be fitted to each other to guide the sliding; A concave portion is formed in the side end surface of the member 6 and is a wedge-like continuous tooth portion 63. At the same time, a fitting portion is also received in the receiving groove 11 to correspond to the side of the lower abutting member 6. And the fitting member 7 is also provided with a tooth portion 71 (shown in FIG. 4) capable of correspondingly engaging the tooth portion 63 on the lower abutting member 6, and the teeth corresponding to the two tooth portions 63 and 71 are provided. At the top and the valley, there are respectively convex portions 64 and recesses 7 which can be fitted to each other. 2, then a recessed groove 73 is recessed on the outer side surface of the fitting member 7, and then an operating rod 8 is inserted through the corresponding outer portion of the base 1 to pass over the fitting member 7 and then penetrate into the lower abutting member 6. A fitting rod 81 is radially disposed on the operating rod 8, and the fitting rod 81 is just fitted into the fitting groove 73 of the fitting member 7.

Therefore, as shown in FIG. 7 and FIG. 8, when the elastic backrest of the seat back is to be stronger, the operator can rotate the operating lever 8 to drive the fitting member 7 to rotate at an angle to allow the fitting member 7 to be rotated. The tooth tips of the teeth 71, 63 between the lower abutting members 6 abut each other, and the corresponding convex portions 64 and the concave portions 72 are also fitted together at the top of the teeth, so that the two achieve stable positioning, that is, The abutting member 6 is displaced inwardly along the receiving groove 11 through the fitting member 7, and then the oblique abutting surface 61 of the lower abutting member 6 is pushed against the inclined surface 51 of the abutting member 5 to make the upper abutting The member 5 is displaced upward, and the top end of the upper folding member 5 is pushed up toward the bottom surface 32 of the spring-loaded pull-up seat 3, so that the spring is tightly pulled and the swinging seat 3 is swung, so that the spring 4 is stretched, that is, the pair is The seat back mount 2 produces a more pressing pull effect, which in turn allows the seat back to bounce The tightness is more tense and strong; at the same time, the operating lever 8 continues to rotate an angle, and the teeth 71, 63 between the fitting member 7 and the lower abutting member 6 are again engaged with each other, and the spring 4 is pressed tightly. The action will shift the upper abutting member 5 downward to force the lower abutting member 6 to be displaced outward along the receiving groove 11, so that the spring is tightly pulled to the original position, and the seat back fixing seat 2 is relatively weak. Pulling effect.

Therefore, when the occupant leans back against the back of the chair, the different tension changes can be felt, and at the same time, when the operating lever 8 is rotated every 180 degrees, the looser or tighter one can be obtained. The change of the tightness adjustment is easier and faster than the conventional one-step adjustment, and it also makes it easier for the occupant to feel the change of the tightness of the different backrests and the selection. The bullets are tight.

Furthermore, the tooth portions 63, 71 which are in contact with each other between the lower abutting member 6 and the fitting member 7 can also be designed as two or more types of continuous tooth portions of different heights (not shown). When the operator 8 rotates the angle change of 90 degrees or 60 degrees, it can produce a different adjustment of the tightness of the spring, so that the number of segments adjusted by the tightness is changed from two segments to three to four segments, thereby increasing the adjustment segment. The number allows the occupant to choose a more appropriate snap.

1‧‧‧Base

11‧‧‧ 容容

12‧‧‧ convex guide

2‧‧‧Back seat holder

20‧‧‧hanging rod

3‧‧‧Spring tight pull pedestal

30‧‧‧ pivot

4‧‧‧ Spring

5‧‧‧Upper parts

51‧‧‧ Oblique face

52‧‧‧ convex guide

6‧‧‧Next part

61‧‧‧ obliquely

62‧‧‧ concave guide groove

63‧‧‧ teeth

7‧‧‧ fittings

71‧‧‧ teeth

73‧‧‧Inlay

8‧‧‧Operator

81‧‧‧Fiing rod

Claims (6)

A seat back elastic adjusting device is a seat back fixing seat for mounting a seat back on a rear side of a base mounted on a leg of a pneumatic rod, and the seat back fixing seat is pulled by a spring The back of the seat is elastically abutted, wherein: the front side of the base is pivoted to the end of a spring-loaded pull-up seat, and the other end of the spring of the pull-back seat mount is fastened to the spring-tight pull-up seat. In the middle of the middle portion, and the base portion corresponding to the other end of the spring tensioning hanger is provided with upper and lower abutting members which abut against the inclined surface, and the upper end of the upper abutting member is abutted against the spring tensioning and pulling seat. At the corresponding end, at the same time, the side surface of the lower abutting member and a fitting member which is also accommodated in the base to abut each other, and the two portions are provided with mutual rotation due to the rotation of the fitting member The toothed portion of the fitting or the tooth top abuts the lower abutting member to move the upper abutting member up and down, thereby driving the spring to pull the seat and swinging forward and backward, and the lead spring generates different tension on the seat back fixing seat. Degree adjustment. The backrest elastic adjusting device according to claim 1, wherein the base is provided with a receiving groove for receiving the upper and lower abutting members, and guiding the front and rear sliding guides and the upper abutting members of the lower abutting member. The upper and lower guides slide. The backrest elastic adjusting device according to claim 2, wherein the back side of the upper abutting member is provided with a concave guiding groove, and the corresponding groove groove wall is provided with an anastomotic convex guiding portion. The backrest elastic adjusting device according to claim 1, wherein a corresponding convex guiding portion and a concave guiding groove are slid together between the inclined abutting surfaces of the upper abutting member and the lower abutting member. . The seat back elastic adjusting device according to claim 1, wherein between the tooth top and the tooth valley of the tooth portion of the fitting member and the lower abutting member, convex portions which are mutually embedded and positioned together are provided. Concave. The backrest resilient adjusting device of claim 1, wherein the outer side of the fitting is provided with a slot, and an operating rod is disposed outside the base to penetrate the engaging member and the lower abutting member, and The operating rod is radially disposed with a fitting rod received in the recess.