JPH0711650Y2 - Armrest support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a support device for a seat armrest.

[Prior Art] Many so-called reclining seats installed on buses and the like are equipped with armrests. In many conventional armrests, a support arm is fixed to a seat cushion (seat part), and the armrest is fixed to the support arm in many cases. In such a fixed armrest, the seat back (backrest portion) is tilted backward (hereinafter, this is referred to as a reclining state, and the state where the seat back is not tilted, on the contrary, is referred to as a non-reclining state). However, it was not convenient for the seated person because the armrest was located in the front.

Therefore, one end side of the support arm is rotatably attached to the seat cushion, and the seat back and the support arm are connected to each other via a cam mechanism or the like to follow the tilting movement of the seat back to the rear. Also developed was to tilt backwards. With this configuration, when the seat back is in the reclining state, the armrest also moves rearward, so that the positional problem of the armrest is solved.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional structure, since the other end of the support arm is fixed to the armrest, the armrest itself has a posture inclining upward,
There was a problem that when a seated person put his arm on it, it was not easy.

The present invention has been made in view of the above-mentioned problems of the conventional techniques, and an object thereof is to provide an armrest support device having a simple structure and excellent usability.

[Means for Solving the Problems] This invention has been made in order to achieve the above object.
The gist thereof is that in a supporting device that supports an armrest of a seat so as to be movable relative to the seat cushion, one end of each of two links arranged in parallel with each other is rotatably supported by the seat cushion and the other end of each link is supported. Is rotatably supported by the armrest, and the dimension between the rotation centers of both ends of one link is the same as the dimension between the rotation centers of both ends of the other link, so that the armrest can move in parallel. A setting block having engaging portions with different widths along the axial direction is inserted between both links so as to be movable in the axial direction. The armrest support device is characterized in that the position of the armrest can be set by sandwiching it between both links.

[Operation] Since the armrest is supported by the seat cushion via a so-called parallel link mechanism and is configured to move in parallel, the tilting posture of the armrest in the vertical direction does not change even if the armrest is stopped at any position. . Therefore, the arm of the seated person is supported in a comfortable posture regardless of which position the armrest is used.

Also, since the gap size between both links is uniquely determined by the stop position of the armrest, each width dimension of the engaging portion in the setting block should be the same as the dimension between both links corresponding to the desired stop position of the armrest in advance. In this case, the armrest can be stopped and held at a desired position by appropriately selecting the engaging portion and sandwiching the engaging portion between the links.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings from FIG. 1 to FIG.

FIG. 1 is a side view of a vehicle reclining seat 1. The reclining seat 1 includes a seat cushion 3 fixed to the floor of the vehicle by legs 2, and a seat cushion 3
A seat back 4 supported by and capable of tilting forward and backward.
The armrest 5 attached to the seat cushion 3 via the support device 10 is a main component.

The seat cushion 3 includes a seat cushion frame 3a fixed to the leg 2 and a seat cushion frame.
It is composed of a cushion part 3b installed on the upper part of 3a.

The armrest 5 can be selected from the positions A, B and C shown in FIGS. 1 and 2 depending on the situation. Here, the position A is the optimum position where the armrest 5 should be when the reclining seat 1 is used in the non-reclining state, and the position B is behind the position A and the reclining seat 1 is used in the reclining state. The optimum position for the armrest 5 is when the vehicle is moving, and the position C is located beside the seat cushion 3 so that the armrest 5 does not get in the way when the reclining seat 1 moves in and out.

As described above, the support device 10 which is the gist of the present invention makes it possible to select the position of the armrest 5. The support device 10 includes two links 11 and 12 arranged in parallel with each other, a cover 13 enclosing the links 11 and 12, a setting block 14 housed in the cover 13, and a setting block 14 penetrating the cover 13. It consists of an operating knob 15 attached to the tip of the.

One end of each of the two links 11 and 12 is rotatably supported by the seat cushion frame 3a, and the other end thereof is rotatably supported by the bracket portion 5a of the frame of the armrest 5. The distance between the rotary support shafts 11a and 11b at both ends of the link 11 and the distance between the rotary support shafts 12a12b at both ends of the link 12 are the same. Therefore, the armrest 5 is supported by the seat cushion 3 by a so-called parallel link, and as the links 11 and 12 rotate as shown in FIG.
Will be translated. Further, when the armrest 5 moves in parallel, the distance between the links 11 and 12 changes. However, when the armrest 5 is located at A in FIGS. The positions of the rotation support shafts 11a, 12a on one side of each of 12 are set.

The cover 13 of the supporting device 10 has a box shape, and the links 11 and 12 are inserted through long holes 13a provided at both ends of the cover 13 in the longitudinal direction. The link 11 is fixed to the inner surface of the cover 13 by appropriate fixing means, while the link 12 is movable relative to the cover 13.

The setting block 14 of the supporting device 10 is shown in FIGS.
As shown in the drawing, from the base end side toward the tip end side, the first engaging portion 14a, the second engaging portion 14b, the third engaging portion 14c, the braking arm portion 1
4d, the shaft portion 14e, and the male screw portion 14f are formed concentrically. First engaging portion 14a, second engaging portion 14b, third engaging portion 14c
Each has a cylindrical shape. The outer diameter of the first engaging portion 14a is made slightly smaller than the distance between the links 11 and 12 when the armrest 5 is located at A in FIGS. 1 and 2. The outer diameter of the second engaging portion 14b is smaller than the outer diameter of the first engaging portion 14a, and the links 11, 1 when the armrest 5 is located at C are shown.
The diameter is slightly smaller than the separation dimension of 2. Second engaging portion 14b
The axial length of is slightly larger than the thickness of the links 11 and 12. The outer diameter of the third engaging portion 14c is the first engaging portion 14a.
The diameter is smaller than that of the second engaging portion 14b, and is slightly smaller than the distance between the links 11 and 12 when the armrest 5 is positioned at B. One end of the braking arm portion 14d extends outward, and its tip portion 14g is bent at a right angle toward the third engaging portion 14c. The distance between the tip portion 14g and the third engaging portion 14c is slightly smaller than the width dimension of the link 12,
The link 12 can be inserted between them. Shaft part
14e has a short cross-sectional shape and projects outward through a rectangular hole 13b provided on the side surface of the cover 13. The hole 13b allows the shaft portion 14e to move in a direction projecting and retracting with respect to the cover 13 (vertical direction in FIG. 5), and moves toward and away from the link 11 (see FIGS. 4 and 5).
It can be moved to the left and right in the figure), and the shaft part
14e is made so as not to be rotatable relative to the cover 13.
The first engaging portion 14a, the second engaging portion 14b, and the third engaging portion 14c are inserted between the links 11 and 12, and by moving the setting block 14 in the axial direction, Any one of the engaging portions can be selected so as to be sandwiched between the links 11 and 12. An operation knob 15 is attached to the male screw portion 14f.

Next, a method of using the supporting device 10 having the above configuration will be described.

When the reclining seat 1 is used in the non-reclining state, the armrest 5 is indicated by A in FIGS. 1 and 2.
In this case, the first engaging portion 14a of the setting block 14 is sandwiched between the links 11 and 12 as shown in FIG. The distance between the links 11 and 12 is the largest at the position A, and the first engaging portion 14a prevents the link 12 from approaching the link 11, so that even if an upward or downward force is applied to the armrest 5. The position of the armrest 5 does not change.

When the seat back 4 of the reclining seat 1 is rolled back and used in the reclining state, the armrest 5 is
, But in that case setting block 14
Is pushed inward from the cover 13 to sandwich the third engaging portion 14c between the links 11 and 12 as shown in FIG.
The tip portion 14g of the braking arm portion 14d is locked to the link 12. When the armrest 5 is used in the position B, a downward load is applied to the armrest 5 in a normal use state, so that the armrest 5 tries to rotate backward. However, since the link 12 is prevented from approaching the link 11 by the third engagement portion 14c, even if a force is applied to the armrest 5, it does not move further rearward. Further, if a forward upward force is applied to the armrest 5, the forward rotation of the armrest 5 is braked as follows. Link 12
Is engaged with the braking arm portion 14d, so that when the link 12 moves away from the link 11, the setting block 14 also moves following this. However, before the armrest 5 reaches the position A, the shaft portion 14e of the setting block 14 comes into contact with the end surface of the long hole 13b of the cover 13, which causes the armrest 5 to move.
Is unable to move further forward. It should be noted that it is possible to prevent the armrest 5 from moving from the position B at all. For example, when the armrest 5 is located at B, the shaft portion 14e of the setting block 14 is provided with a notch having a width slightly larger than the shaft portion 14e downward from the long hole 13b of the cover 13, If the shaft portion 14e is engaged with this notch, the setting block 14 cannot move relative to the cover 13, so that the armrest 5 can be stopped at the position B.

When the user sits on the reclining seat 1 or moves away from the reclining seat 1, the armrest 5 is positioned at C. In that case, the engagement between the link 12 and the braking arm 14d is released, and as shown in FIG. The engaging portion 14b is sandwiched between the links 11 and 12. The second engaging portion 14b is the link 12
Since the armrest 5 is prevented from approaching the link 11, even if a downward load is applied to the armrest 5, the armrest 5 does not move further downward.

The armrest 5 maintains a constant inclination angle with respect to the floor surface when the armrest 5 is positioned at any of A, B, and C described above. Therefore, the arm is supported in a comfortable posture in both cases of reclining and non-reclining.

This invention is not limited to the above-mentioned embodiment, and various modes can be adopted.

[Effect of the Invention] As described above, the present invention has the following excellent effects.

Since the armrests are designed to move in parallel, the vertical tilting posture does not change even if the armrests are stopped at any position, and as a result, the seated person's posture does not change when the armrests are used at any position. The arms are supported in a comfortable posture, which is extremely convenient.

Further, if each width dimension of the engaging portion of the setting block is set in advance to the same dimension as the inter-link dimension corresponding to the desired stop position of the armrest, the armrest can be stopped and held at the desired position. There is also an effect that you can.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention, FIG. 1 is a side view of a reclining seat, FIG. 2 is a longitudinal sectional view of an armrest supporting device, and FIG.
The figure shows an external perspective view of the setting block and operation knob.
FIG. 4 is an enlarged side view of the main part of the cover, and FIGS. 5 to 7 are transverse cross-sectional views of the supporting device when the stop positions of the armrests are different. 1 ... Reclining seat, 3 ... Seat cushion, 5 ... Armrest, 10 ... Supporting device, 11, 12 ...
Links, 11a, 11b, 12a, 12b ... Rotation supporting shaft (rotation center), 1
4 …… Setting block, 14a …… First engaging part, 14b
...... Second engagement part, 14c ...... Third engagement part.

Claims (1)

[Scope of utility model registration request] 1. A support device for supporting an armrest of a seat so as to be movable relative to a seat cushion. One end of each of two links arranged in parallel to each other is rotatably supported by the seat cushion, and each other. The ends are rotatably supported by the armrest, and the dimension between the rotation centers of both ends of one link is the same as the dimension between the rotation centers of both ends of the other link, so that the armrest can move in parallel. A setting block having engaging portions of different widths along the axial direction is movably inserted in the axial direction between both links, and the engaging portion of any width is formed. A support device for an armrest, characterized in that the position of the armrest can be set by sandwiching between the two links.