JPH0630824A - Attaching device for armrest - Google Patents

Abstract

PURPOSE:To stably position an armrest at a use position or a storage position. CONSTITUTION:An armrest attaching device is composed of a rotary cross shaft 15 attached to a seat back so as to be rotatable about a horizontal center axis and having end parts which are horizontally projected from the seat back, and an armrest 4 having an attachment 8 which is projected from the proximal side thereof so as to define an L-like shape. The front end part of an attachment 8 of the armrest 4 is journalled to the projected end part of the rotary cross shaft 15 by means of a pin 22 so that only the armrest 4 is rotated about the pin 22 so that it is stored in a storage recess formed in the lateral surface of the seat. Further, an overcenter spring 29 is attached between the rotary cross shaft 15 and the armrest 4 so that the armrest 4 is stably positioned at its use position or its storage position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable armrest mounting device.

[0002]

2. Description of the Related Art The prior application, Japanese Patent Application No. 4-
No. 155908 (prior application by the same applicant) has an end that is rotatably attached to a backrest seat and has an end portion that is L-shaped on the base side and a rotation horizontal axis that projects outward from the backrest seat. It consists of an armrest with a mounting bracket protruding,
The tip end of the mounting bracket is pivotally attached to the protruding end of the rotation horizontal shaft by an orthogonal shaft, and the armrest rotates together with the rotation horizontal shaft, and only the armrest rotates about the orthogonal shaft. It is disclosed that the backrest seat is configured to be stored in a storage recess provided on a side surface of the backrest seat.

[0003]

SUMMARY OF THE INVENTION In the prior application, after the armrest is erected from a substantially horizontal use state, the armrest is rotated about an orthogonal axis, and the storage recess is provided on a side surface of a backrest seat. Although it was formed so as to be rotated and stored inside, the fact that it is rotated inside the storage recess is unstable because it may rotate upward in the used state.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a stable mounting mechanism with a simple structure that prevents upward rotation in use and popping out in storage.

[0005]

According to the present invention, therefore, the rotary seat is attached to the backrest seat 3 so as to rotate about the lateral axis, and the end portion thereof projects laterally from the backrest seat 3. The rotating horizontal shaft 1 includes a shaft 15 and an armrest 4 having a mounting bracket 8 protruding toward the base side so as to be L-shaped.
The tip end of the mounting metal fitting 8 of the armrest 4 is pivotally attached to the protruding end of the armrest 4 by a pin 22 so that the armrest 4 rotates together with the rotary lateral shaft 15 and the armrest 4 is rotated about the pin 22. In the structure in which only the armrest 4 is rotated to be stored in the storage recess provided on the side surface of the backrest seat 3, the armrest 4 is fixed to the use position and the storage position, respectively. Axis 15
And an over center spring 29 between the armrest 4 and
This is a device for attaching an armrest to which is attached.

[0006]

Embodiments of the present invention will be described with reference to the drawings.
Is a seat for vehicles or the like, 2 is a seat, 3 is a backrest seat formed with a width substantially the same as that of the seat 2, and 4 is an armrest positioned so as to project forward to the side of the seat 2. Reference numeral 5 denotes an armrest frame of the armrest 4. A cushion material 6 is attached to the outer periphery of the armrest frame 5 as is known, and the surface of the cushion material 6 is covered with a skin member 7.

At the base of the armrest frame 5,
The tip of a mounting bracket 8 having a U-shaped cross section in a direction intersecting the length direction of the armrest frame 5 is fixed. The mounting bracket 8 includes one side plate 9 to which the armrest frame 5 is fixed, another side plate 10 parallel to the one side plate 9 and the one side plate 9.
And the other side plate 10 are formed by the connecting plate portion 11. Reference numeral 13 is an opening formed between the one side plate 9 and the other side plate 10, and 14 is an insertion hole formed in the one side plate 9 and the other side plate 10.

Reference numeral 15 is a horizontal axis of rotation in the left-right direction, and the tip end side thereof has the same width as the inner width of the opening 13 of the side wall 1.
6 and 16 and the bottom wall 17 are formed into a "U" shape,
Insertion holes 21 are formed at the tips of the side walls 16 and 16, respectively, and the insertion holes 21 and the insertion holes 14 are aligned with each other, and the pins 22 rotate the base of the mounting bracket 8 to the tip of the rotating horizontal shaft 15. Mount freely.

Thus, the side wall 1 of the rotating horizontal shaft 15
6 and 16 are provided with a fixed side mounting shaft 23 parallel to the pin 22, and the mounting bracket 8 is also provided with a moving side mounting shaft 24. A center spring 29 is provided. The relationship between the fixed side mounting shaft 23, the moving side mounting shaft 24, and the pin 22 is as follows.
By the rotation of the
When 4 moves to the center of the pin 22, the moving-side mounting shaft 24 goes beyond the so-called dead center, and the action of the over-center spring 29 causes the mounting bracket 8 to be in both the used position and the stored position.
Is controlled so as not to rotate around the pin 22, and the armrest 4 is stabilized at each position.

The rotating horizontal shaft 15 is rotatably attached to a bracket 26 fixed to one of the left and right sides of the seat frame 25 of the backrest seat 3, and is attached to the rotating horizontal shaft 15 protruding inward from the bracket 26. A mating member 27 is provided, and the engaging member 27 engages with an engaging protrusion 28 provided on the bracket 26 to hold the armrest 4 in a substantially horizontal use state and a standing storage state.

Thus, the side surface 32 of the backrest seat 3
A vertically long storage recess 33 is formed in the storage recess 33 (not limited to the side surface), and the rotating horizontal shaft 1 is provided below the storage recess 33.
5, the armrest 4 in a horizontal state is rotated around the horizontal axis of rotation 15 to stand up, and then the mounting bracket 8 is rotated about the horizontal axis of rotation 15 about the pin 22. The armrest 4 can be stored in the storage recess 33.

The side surface of the rotating horizontal shaft 15 in the upright state of the armrest 4 in the direction in which the mounting member 8 rotates is notched to form an inclined surface 34, but on the opposite side of the inclined surface 34. Is a stopper surface 3 that abuts the inner surface of the connecting plate portion 11 of the mounting member 8 to stop the rotation of the mounting member 8.
5 to form.

[0013]

[Operation] Next, the operation will be described. 2 and 5 show the mounting bracket 8 and the rotating horizontal shaft 15 of the armrest 4 in the retracted state.
And the armrest 4 is attached to the storage recess 33 of the backrest seat 3.
When it is further pulled out, the mounting member 8 rotates outward about the rotating horizontal shaft 15 about the pin 22, and the connecting plate portion 11 of the mounting member 8 is rotated.
Comes into contact with the bottom wall 17 of the rotating horizontal shaft 15 to stop the rotation (FIG. 6).

Next, when the upper portion of the armrest 4 in the upright state is rotated forward, the armrest frame 5 of the armrest 4 rotates the mounting member 8, the mounting member 8 rotates the rotating horizontal shaft 15, and the rotating horizontal shaft 15 When the engaging member 27 of is engaged with the engaging protrusion 28 of the bracket 26, the rotation of the rotating horizontal shaft 15 is stopped, and the armrest 4 becomes substantially horizontal,
By engaging the engaging member 27 of the rotating horizontal shaft 15 and the engaging protrusion 28 of the bracket 26, the tip of the armrest 4 is held at the working height position (FIG. 7).

At this time, the relationship between the mounting bracket 8 and the rotary horizontal shaft 15 is that the rotary horizontal shaft 15 rotates with respect to the bracket 26, so that the connecting plate portion 11 of the mounting bracket 8 is rotated by the rotary horizontal shaft 15.
The lower end of the mounting member 8 is prevented from rotating downward about the pin 22 with respect to the rotating horizontal shaft 15 by contacting the lower surface of the rotating shaft 15. Therefore, the upper surface of the armrest 4 is held horizontally when viewed from the front.

Further, since the rotation horizontal shaft 15 rotates with respect to the bracket 26, the axial center direction of the pin 22 becomes the front-back direction, so that the tip end of the armrest 4 does not shake in the left-right direction.

Further, as the rotating horizontal shaft 15 rotates with respect to the bracket 26, the one side plate 9 and the other side plate 10 of the mounting bracket 8 come into contact with the front surface and the rear surface of the rotating horizontal shaft 15, respectively. The metal fitting 8 is prevented from swinging back and forth with respect to the horizontal axis of rotation 15, and the tip of the armrest 4 is also prevented from rattling in the left-right direction (FIG. 7).

Contrary to the above, when the tip of the armrest 4 in a substantially horizontal state of use is lifted upward, the armrest frame 5 of the armrest 4 rotates the mounting member 8 about the rotating horizontal axis 15 and the armrest 4 stands up. Then, when the armrest 4 in the upright state is pushed rearward, the mounting bracket 8 pivots rearward about the pin 22, and the armrest 4 is stored in the storage recess 33 of the backrest seat 3.

As described above, the pin 22 which serves as the center of rotation for moving the armrest 4 from the retracted position to the retracted position is attached to the rotating horizontal shaft 15 which is rotatably provided within the fixed range on the backrest seat 3 side. Therefore, when the armrest 4 is used in a substantially horizontal state, the axial center direction of the pin 22 is displaced from the vertical direction in the substantially horizontal front-rear direction, so that the rotation direction of the mounting bracket 8 can also be displaced, and the armrest 4 can be displaced. 4 is rotatable about the rotary horizontal shaft 15 and the pin 22, but does not move in any other direction, and supports the load applied to the armrest 4.

Thus, the side wall 1 of the rotating horizontal shaft 15
6 and 16 are provided with a fixed side mounting shaft 23 parallel to the pin 22, and the mounting bracket 8 is also provided with a moving side mounting shaft 24. A center spring 29 is provided, and the fixed side mounting shaft 23, the moving side mounting shaft 24, and the pin 22 are related to each other by the rotation of the mounting bracket 8 with respect to the fixed side mounting shaft 23.
When is moved to the center of the pin 22, the moving side mounting shaft 24 is configured to go beyond the so-called dead center, so that the mounting bracket 8 rotates about the pin 22 in each of the use position and the storage position. Is restricted, and in particular, when the armrest 4 is in use, it gives resistance to the mounting bracket 8 rotating about the pin 22.
To prevent the person from standing on the seated side.

Further, the armrest 4 is rotated from the respective states of the use position and the storage position to move the mounting shaft 24 on the moving side.
When the so-called dead point is exceeded, the armrest 4 is rotated toward the use position or the storage position by the elastic force of the overcenter spring 29, and the operability is improved.

For convenience of explanation, the mounting member 8 and the armrest frame 5 are described as separate members, but not only can they be integrally molded, but the other side plate 10 of the mounting member 8 is not always necessary. No, mounting bracket 8 and rotating horizontal axis 15
It suffices that and are pivotally attached by the pin 22.

[0023]

[Effect] According to the present invention, the rotating lateral shaft 15 is attached to the backrest seat 3 so as to rotate around the horizontal axis, and the end of the rotary lateral shaft 15 projects laterally from the backrest seat 3. The armrest 4 is formed by protruding the mounting member 8 so as to have an L-shape, and the tip end of the mounting member 8 of the armrest 4 is axially attached to the protruding end portion of the rotating horizontal shaft 15 by a pin 22. The armrest 4 is rotated together with the rotary horizontal shaft 15 and only the armrest 4 is rotated around the pin 22 so as to be stored in a storage recess provided on a side surface of the backrest seat 3. In the above, the armrest 4 is an armrest mounting device in which an overcenter spring 29 is mounted between the rotary horizontal shaft 15 and the armrest 4 so that the armrest 4 is fixed in the use position and the storage position, respectively. Therefore, since the armrest 4 is fixed in the use position and the storage position by the over-center spring 29 between the rotary horizontal shaft 15 and the armrest 4, the armrest 4 is prevented from unintentionally rotating from the use position and the storage position. . The over-center spring 29 urges the armrest 4 to rotate toward the use position or the storage position when the moving-side mounting shaft 24 crosses the so-called dead center, so that the operation load is reduced and the operability is improved. .

[Brief description of drawings]

FIG. 1 is a perspective view of a seat.

FIG. 2 is a partially transverse plan view with an armrest frame attached.

FIG. 3 is an assembled perspective view.

FIG. 4 is a perspective view.

FIG. 5 is a plan view of the storage state.

FIG. 6 is a plan view of a standing state.

FIG. 7 is a plan view of the usage state.

FIG. 8 is a diagram showing an operating state of the over center spring.

[Explanation of symbols]

1 ... Seat, 2 ... Seat, 3 ... Backrest seat, 4 ... Armrest, 5 ... Armrest frame, 6 ... Cushion material, 7 ... Skin member, 8 ... Mounting bracket, 9 ... One side plate, 10
... Other side plate, 11 ... Connection plate part, 13 ... Opening part, 14 ... Insertion hole, 15 ... Rotation horizontal axis, 16 ... Side wall, 17 ... Bottom wall, 21 ...
Insertion hole, 22 ... Pin, 23 ... Fixed side mounting shaft, 24 ... Moving side mounting shaft, 25 ... Seat frame, 26 ... Bracket,
27 ... Engaging member, 28 ... Engaging protrusion, 32 ... Side surface, 33 ...
Storage recess.

Claims (1)

[Claims] 1. A rotating horizontal shaft 15 which is attached to the backrest seat 3 so as to rotate about a horizontal axis, and whose end portion projects laterally from the backrest seat 3, and an L-shaped base portion side. The armrest 4 is formed by projecting the mounting metal fitting 8 so as to be shaped like a pin. The tip end of the mounting metal fitting 8 of the armrest 4 is axially attached to the projecting end portion of the rotating horizontal shaft 15 by a pin 22, The armrest 4 rotates together with the rotary horizontal shaft 15 and only the armrest 4 rotates around the pin 22 so as to be stored in a storage recess provided on the side surface of the backrest seat 3. The attachment device of the armrest, wherein an overcenter spring 29 is attached between the rotary horizontal shaft 15 and the armrest 4 so that the armrest 4 is fixed in the use position and the storage position, respectively.