JPS5817494Y2 - reclining device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reclining device that can adjust the inclination of the back of a chair in stages by operating the back of the chair.

The so-called reclining device that adjusts the inclination of the backrest (backrest part) of various chairs in stages is a type that is adjusted by operating a button or lever, or a type that is adjusted by operating the backrest. Various types of devices are known to perform this.

The former type, which is adjusted by operating a button or lever, has the advantage of being easy to operate while seated, but requires a large number of components and is expensive.

In addition, in the latter type, an arcuate ratchet is fixed to the side surface of the intersection of the backrest and the seat, and a rod that engages with the ratchet is pivotally attached to the backrest side. Adjustment is made by first setting the backrest to the maximum inclination and then pulling and operating the backrest to set it at the desired inclination position, so the operation procedure is a little more complicated than the former, but the structure is comparable. It has the advantage of being simple and inexpensive to manufacture.

However, as mentioned above, there is a ratchet on the side of the chair to determine the angle of inclination of the backrest.
Not only does this have the problem of biting a part of the clothes during operation, but it also increases the width of the chair, which is not at all desirable in terms of space and appearance.

The present invention solves the above-mentioned problem of adjusting the inclination angle of the backrest by operating the backrest, and allows the reclining mechanism to be attached to the lower surface of the seat, allowing the backrest to be operated with one hand. To provide a device that can lock the back part at a desired angle.

The drawings showing the embodiments of the present invention will be explained below.
Reference numeral 1 denotes a seat portion mainly composed of a chair, and 2 a back support portion.The back support portion 2 is tiltably supported by a support shaft 3 at a position near the rear of the seat portion 1.

As shown in exploded view in FIG. 2, the reclining device according to the present invention includes an end slit 10 extending in the front-back direction of the main body of the chair, and a long hole 11 extending in the vertical direction above the rear part of the end slit 10, a support member 14 in which a lock pin 13 elastically biased downward by a spring 12 is attached to the elongated hole 11 so as to be movable up and down; and at least two pin shafts 15 movable within the slit 10. are fixed at intervals, and have a recess 16 on the upper edge into which the lock pin 13 can be inserted, and a push-up part 17 inclined downwardly toward the rear from the recess 16; It has a plurality of hook-shaped notches 19.19 into which the lock pin 13 is inserted to determine the inclination of the back rest 2, and the support member 14 is provided at a position below the notches 19.19. Stem member 21 equipped with an end slit 20 extending longer than the end slit 10
As shown in FIGS. 1 and 3, the support member 14 is attached to the front of the lower surface of the seat part 1 so as to be swingable or vertically movable, and one end of the suite member 21 is attached to the backrest part. 22 is pivoted below the support shaft 3 and the other end 2
3 is the end slit) 20 is opposed to the end slit 10 of the support member 14, and the pin shaft 15.15 of the intermediate slider 18 is inserted into the end slit 10, 20 to remove the stem member. 21 and the intermediate sliding body 18 to the support member 14
When the backrest 2 of the chair is tilted toward the seat 1, the support member 2
1 is displaced backward and the end slit of the installation member 21) 2
The intermediate sliding body 18 is moved rearward by the front end 24 of 0, and its pushing-up portion 17 pushes the lock pin 13 against the elasticity of the spring 12 into the notch 1 of the stem member 21.
9 and the lock pin 13 was fitted into the recess 16 of the intermediate sliding body 18 to enable forward movement of the stem member 21, and then the back support part 2 was tilted significantly backward. At this time, the stem member 21 moves forward and uses the rear end 25 of the slit 20 to close the intermediate sliding body 18.
while moving the lock pin 13 forward to the recess 16.
When the lock pin 13 is fitted into the notch 19 at the most tilted position of the back rest part 2 by lowering it onto the stem member 21 via the tilting part 17, and the back rest part 2 is further raised. The step member 21 moves rearward and sequentially opens the next notch 19.1.
9 so that the lock pin 13 can be fitted into it.

In the figure, 26 is a suspension device for the support member 14.

To explain in more detail about FIGS. 4 to 7 showing the operation of the device of the present invention described above, FIG. 4 shows a state in which the back support portion 2 is locked in its most upright state.

In this state, when the backrest part 2 is tilted forward, that is, toward the seat part 1 side, the above-mentioned stem member 21 is moved to the opposite side, that is, to the rear, and the front end 24 of the end slit 20 of the stem member 21 is moved to the opposite side, that is, to the rear. The intermediate sliding body 18 is moved rearward by coming into contact with the pin 15 of the intermediate sliding body 18 .

As the intermediate sliding body 18 moves backward, the inclined push-up action portion 17 comes into contact with the lower surface side of the lock pin 13 and pushes up the lock pin 13 against the elasticity of the spring 12, so that the intermediate sliding body 18 The lock pin 13 pushed up at the time when it has moved most rearward, that is, when the pin 15 of the intermediate sliding body 18 comes into contact with the rear end 10' of the slit 10 of the supporting member 14, It is inserted into the recess 16 of FIG. 5 and becomes the state shown in FIG.

Next, when the backrest 2 that was tilted forward is tilted significantly backward,
As the stem member 21 moves forward (FIG. 6), the rear end 25 of the end slit 20 of the stem member 21 moves forward.
contacts the pin 15 of the intermediate sliding body 18 and the intermediate sliding body 1
8 is moved forward, whereby the locking pin 13 is lowered from the recess 16 through the tilting part 17 onto the stem member 21, in the rearmost notch 19 holding the backrest part 3 in the most tilted position. , and the back rest 3 is locked in the most tilted position.

(FIG. 7) Next, when the back support part 3 is gradually displaced in the upright direction as desired, the stem member 21 moves rearward, and then the lock pin 13 is fitted into the notch 19 and the desired tilted position is reached. locked.

Note that the above-mentioned support member 14, intermediate sliding body 18, and step member 21 are shown as examples in which they are made of plate-shaped materials in FIGS. 2 and 3, but as shown in FIG. It is extremely advantageous in terms of strength if the stem member 21 is made of a material with a U-shaped cross section, the pin shafts 15 are protruded from both sides of the intermediate sliding body 18, and the pin shaft 15 is mounted as shown in FIG. becomes.

As described above, the reclining device according to the present invention has an end slit 10 extending in the front-rear direction of the main body of the chair, and an elongated hole 11 extending in the vertical direction above the rear part of the end slit 10. A support member 14 on which a lock pin 13 elastically biased in the direction is mounted so as to be movable up and down, and at least two pin shafts 15 movable within the slit 10 with an end are fixed at intervals and fixed at the upper edge. The intermediate sliding body 18 includes a recess 16 into which the lock pin 13 can be inserted, a push-up portion 17 that slopes downward toward the rear from the recess 16, and a back rest with the lock pin 13 on the upper edge. An end slit 20 having a plurality of notches 19.19 that determines the inclination of the portion 2, and extending further in the front-rear direction than the end slit 10 of the support member 14 at a position below the notch 19.19. The support member 14 is attached to the front of the lower surface of the chair main seat part 1 so as to be swingable or vertically movable. The pin shaft 15 of the intermediate sliding body 18 is pivoted to the lower side of the support shaft 3, and the other end thereof is opposed to the end slit 10 of the support member 14, and the pin shaft 15 of the intermediate sliding body 18 is connected to the end slit 10. .20 to hold the stem member 21 and the intermediate sliding body 18 slidably in the front and rear directions with respect to the support member 14, so that the lower space of the main seat part of the chair is maintained. The device can be attached using the method, and since the structure is simple, it can be easily applied to various types of chairs.

Furthermore, as mentioned above, the back support can be locked at a desired inclination simply by tilting the back support, and the lock may come off if clothes are pinched or unexpectedly subjected to external force during the operation. It has many practical effects such as no inconvenience.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially omitted side view of a chair to which the device of the present invention is attached, Fig. 2 is an exploded side view of the main parts of the device, and Fig. 3 is an exploded side view of the main part of the device. 1 is a front sectional view of the main parts, FIGS. 4 to 7 are side views showing the operation procedure, FIG. 8 is an exploded perspective view showing another embodiment, and FIG. 9 is a front view of the same assembled state. FIG. 1... Seat part, 2... Backrest part, 3...
... Support shaft, 10 ... Ended slit of support member, 11 ... Elongated hole, 12 ... Spring, 13 ... Lock pin, 14...
Support member, 15...Pin shaft, 16...
Concave portion, 17... Push-up action portion, 18...
・Intermediate sliding body, 19... Notch, 20...
...Ended slit of the stem member, 21...Stee member.

Claims (1)

[Scope of utility model registration request] An end slit 10 extending in the front-rear direction of the main body of the chair, and a long hole 1 extending in the vertical direction above the rear of the end slit 10
1, and a support member 14 in which a locking bolt 13 having a locking mechanism 13 elastically biased downwardly by a spring 12 is mounted in the elongated hole 11 so as to be movable up and down; an intermediate sliding body 18 having pin shafts 15 fixed at intervals and having a recess 16 on its upper edge into which the lock pin 13 can be fitted, and a push-up portion 17 tilting downward rearward from the recess 16; , has a plurality of notches 19.19 on the upper edge of which the lock pin 13 is fitted and determines the inclination of the back support part 2, and an end slit of the support member 14 at a position below the notches 19.19. 10
The support member 14 is attached to the main body of the chair and the front of the lower surface of the seat part 1 so as to be swingable or vertically movable. One end of one member 21 is connected to the back rest 2
The pin shaft 15 of the intermediate sliding body 18 is pivoted to the lower side of the support shaft 3, and the other end thereof is arranged so that the end slit 20 of the support member 14 is opposed to the end slit 10, and the pin shaft 15 of the intermediate sliding body 18 is connected to the end slit 10. .20 to hold the stem member 21 and the intermediate sliding body 18 slidably in the front-rear direction with respect to the support member 14.