JPS58141941A - Arm rest mechanism - Google Patents

Abstract

PURPOSE:To provide adjustability for an arm rest in compliance with a tilting seat back by allowing the arm rest to swing in the width derection of the seat back and thereby releasing the lock. CONSTITUTION:The arm rest 5 is installed outside a bracket 4 of the seat back frame 4. A fitting hole 6 for the center pin 10 is provided at the tail part of this bracket 4 while a long hole 8 is formed at the head part concentrically with the fitting hole 6, where No. 1 lock tooth 14 is provided at the front edge part. No. 1 recess 7 is formed at the internal surface of the arm rest 5 in mating with the fitting hole 6, and No. 2 recess 9 at the tail part in mating with the long hole 8, and then a pin 13 for mounting No. 2 lock tooth 15 is installed. This No. 2 recess 9 shall house a tensile spring 17, which will be retained by a spring bracket 16. The root of center pin 10 is hinged by a pivoting pin 12 with swingability reserved in the width direction of seat back 1 and also with rotatability round the center pin 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an armrest mechanism that adjusts the set position of an armrest.

As shown in Figs. 1 and 2, conventionally commonly used armrests have an armrest main body 2 fixedly attached to the frame of the seatback 1, so in the case of a reclining seat, the seatback 1 can be tilted. When this happens, there is a drawback that the armrest main body 2 moves to a position that is not suitable for use.

In addition, several systems have been proposed in which the set position of the armrest main body can be adjusted, but all of them have the disadvantage of poor operability and the disadvantages of protruding knobs and the like that get in the way.

An object of the present invention is to provide an armrest mechanism that allows the armrest main body to be adjusted to a position suitable for each person's use when the seatback is tilted, has good operability, and has no protruding objects on the sides of the seatback. This will become clear from the detailed description below with reference to the drawings.

3 to 8 show an embodiment of the present invention.

In the embodiment shown in these figures, a bracket 4 is fixed to a seat back frame 3 of a seat back 1, and an armrest main body 5 is arranged on the outer side of the bracket 4.

The bracket 4 has a center pin fitting hole 6 formed near its rear end, and an arc-shaped elongated hole 8 concentric with the fitting hole 6 formed at its front end. Long hole 8 is the second
The lock tooth attachment acts as an escape hole for the lock pin.

A center bin 10 is fitted into the fitting hole 6 via a constricted portion 11 formed in the head, and the center bin 10 can rotate within the fitting hole 6.

On the inside of the bracket 4, a first locking tooth 14 having a large number of teeth on an arc centered on the center pin 10 is attached to the front edge side of the elongated hole 8. A first recess 7 is formed at a position corresponding to the fitting hole 6 in , and a second recess 9 is formed at a position corresponding to the rear end 〒, p, and also corresponds to the elongated length '8. A pin 13 for attaching the second lock tooth is implanted at the position, and a pin 13 for attaching the second lock tooth is installed at the position.
The distal end portion of is projected inside the elongated hole 8.

A root portion of a centerbin 10 is inserted into the first recess 7 , and the root portion of the centerbin 10 is hinged to a pivot pin 12 supported in the first recess 7 . As a result, the armrest main body 5 swings inward in the width direction of the seatback 1 from the state shown in FIG. The seat back 1 is configured to be able to rotate in a vertical plane on the side of the seat back 1, as shown by the arrow in FIG. There is.

A second lock tooth 15 is attached to the distal end of the attachment bottle 13, and the second lock tooth 15 engages with any position of the first lock tooth 14.

The second recess 9 includes a spring platen 16 fixed to the rear end side of the armrest main body 5 of the center bin 1o, and a tension spring 17 fixed to the side wall of the second recess 9.
is housed therein, and is configured such that, after swinging the armrest body 5 in the direction of arrow a shown in FIG. 8, when the armrest body 5 is released, the armrest body 5 can be pulled back by the tension spring 17. .

The armrest mechanism of the above embodiment operates and functions as follows.

When setting the armrest main body 5 from the stored state shown by the solid line in Fig. 3 to the use position shown by the broken line, or set it in a position suitable for use with the seat back 1 tilted rearward as shown in Fig. 4. When the armrest main body 5 is moved from the state shown in FIG. 7 to the state shown in FIG. 5 and FIG.
Applying a force in the direction indicated by , the armrest main body 5 is swung inward of the seat back 1 against the spring force of the tension spring 17 using the hinge joint formed by the center bin 10 and the pivot pin 12 as a fulcrum. The second lock tooth 15 is removed from the first lock tooth 14 to unlock the armrest main body 5.

Next, the armrest main body 5 is rotated in a vertical plane as shown by the arrow in FIG. The armrest main body 5 is pulled back by the spring force 17, the second lock tooth 15 engages with the first lock tooth 14, and the armrest main body 5 is locked, so that the armrest main body 5 can be easily set in its use position. Can be done.

Furthermore, the set position of the armrest main body 5 can be adjusted steplessly within the range where the first lock teeth 14 and the second lock teeth 15 engage.

When the armrest main body 5 is not used, the armrest main body 5 is swung inside the seat back 1 in the same manner as described above, the lock is released, and the armrest main body 5 is rotated to the storage position. Release the armrest main body 5 at the storage position, and press the first button. Second lock tooth 14.1
It is locked through engagement 5.

In the illustrated embodiment, the lock can be released when the armrest main body 5 is swung inward of the seat back 1; It may be configured so that it can be canceled.

Furthermore, the specific structure for rotating the armrest main body 5 in a vertical plane on the side of the seat back 1 and swinging it inward or outward in the width direction of the seat back 10 is not limited to the illustrated embodiment. Any device that can perform the desired operation is sufficient.

In addition, instead of the tension spring 17 that pulls the armrest body 5 from the unlocked position to the lock position, a compression spring is installed at a position where the center pin 10 in the length direction of the armrest body 5 is closer to the front end side. Alternatively, other means may also be used.

The above is the configuration of one embodiment of the armrest mechanism according to the present invention. According to this configuration, the armrest main body is swung in the width direction of the seat back, and the armrest main body is swung in the width direction of the seat back. By releasing the lock caused by the engagement of the second lock teeth, the armrest body can be rotated in the vertical plane of the side of the seat pack, and can be set as desired. Even when the bag is tilted, the armrest body can be adjusted to a position suitable for each user.

In addition, according to the present invention, as mentioned above, the set position can be adjusted by directly operating the armrest body, which has the effect of excellent operability.Moreover, there are no protruding objects such as knobs on the side of the seat back, and the armrest body can be adjusted directly. It also has the effect of eliminating concerns such as getting caught.

It should be noted that the above description merely shows one embodiment of the present invention, and it will be obvious that various modifications and changes can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

FIGS. 1 and 2 are side views showing the attachment of an armrest in a conventional reclining seat, FIGS. 3 to 8 show an embodiment of the present invention, and FIGS. A side view of a reclining seat having an armrest to which the armrest mechanism of the invention is applied, in use, FIG. 5 is a plan view, FIG. 6 is an enlarged side view of the armrest mechanism of the invention, and FIG. 7 is a line A-A in FIG. 6. FIG. 8 is a cross-sectional plan view taken by cutting at , and FIG. 8 is an explanatory view showing the operation corresponding to FIG. In the figure, 1... Seat back, 3... Seat back frame, 4... Bracket, 5... Armrest body, 10... Center pin, 12... Center pin pivot pin. 14.15... 1st. Second lock tooth, 17... tension spring, a... armrest swing direction, b...
Direction of armrest rotation. Figure 5 1 Figure 6 Figure 7 Figure 8 Figure 5 It

Claims (1)

[Claims] The armrest body is attached to the side of the seatback frame so as to be rotatable in a vertical plane and swingable in the width direction of the seatback, and a first locking tooth having a large number of teeth on the side of the seatback frame. The armrest body is provided with second lock teeth that engage with the first lock teeth, and the armrest body is pivoted either inward or outward in the width direction of the seat back, thereby locking the first lock. An armrest mechanism characterized in that the second locking tooth is disengaged from the tooth and the set position of the armrest body can be adjusted.