JP2554307Y2 - Vehicle seat armrest - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat armrest rotatably supported by a support shaft protruding from a side of a seatback of a vehicle.

[0002]

2. Description of the Related Art FIGS. 5 to 7 show a conventional armrest 9 provided on a side portion of a seat back 1 of a vehicle of this type.
As shown in FIG. 6, a central shaft 10 as a support shaft and a pipe 11 surrounding the central shaft 10 protrude from a side portion of the seat back 1, and an armrest frame built in the armrest 9 is coaxially formed in a concave portion 11 a thereof. Twenty pipes 21 are rotatably supported. A cam 15 is provided at the tip of the central shaft 10.
(The shape in FIG. 6 is shown with a cutout at the top.) A spiral spring 13 wound clockwise as shown in the figure is mounted around the pipe 21, and the inner end thereof is a sheet. Fixed on the back side.

As shown in FIG. 5, an armrest frame 20 has a parallel first arm 25 and a second arm 2 hinged at intermediate positions by pins 25a and 26a, respectively.
6 are arranged orthogonally to the armrest front-rear direction, and a pin 27 that moves along the contour of the cam 15 protrudes from an inner end of the first arm 25, that is, an end on the seatback 1 side, to form a collar 27a. Is installed. Second arm 2
6, the proximal end of the spring tension arm 28 is hinged with a pin 28a, and the distal end thereof is bent upward in an L-shape above the spiral spring 13 as shown in FIG. 13a are mutually movably inserted into the holes 28b. The outer ends of the arms 25 and 26 are the arms 2 respectively.
9 with pins 25b and 26b and a spring 30
In the direction in which the pin 27 approaches the cam 15, ie, the center shaft 10
It is being urged toward. Arm 29 is armrest 9
, And a button 35 is attached to the front end thereof.

As shown in FIG. 7, a concave portion 15a into which the collar 27a is dropped and a lock edge portion 15c are formed in the upper portion and the front portion of the contour of the cam 15, respectively. 15b. The lock edge portion 15c is formed with an inclined region 151 whose diameter gradually changes from the arc portion 15b. The armrest 9 is rotatable over a fine adjustment range A more than the lock position 152 in the middle thereof, so that the lock position can be adjusted in this range.

In the retracted position above the armrest 9, the collar 27a drops into the notch 15a as shown in FIG. Is compressed to restrain the pipe 21 and thus lock the armrest 9. When the button 27 is pressed to release the collar 27a from the concave portion 15a, and the armrest 9 is rotated horizontally forward to be placed on the arc portion 15b,
The spiral spring 13 is pulled to widen the inner diameter to maintain the brake release state, and the armrest 9 is rotated by a slight force. When the collar 27a reaches the lock position 152, the spiral spring 13 is compressed again to restrain the pipe 21.

Thereafter, the armrest 9 is locked and becomes usable, and the use position can be finely adjusted in the fine adjustment range A while being unlocked by a button operation. When the armrest 9 is rotated by a button operation from the horizontal use position to the upper storage position and the collar 27a reaches the lock position 152, the armrest 9 rides on the arc portion 15b via the inclined region 151 without any button operation, and It falls to 15a and is locked automatically.

[0007]

According to such a lock-type armrest, when the vehicle is suddenly braked, the armrest does not naturally fall from the vertical direction to a horizontal position. It was necessary to operate the No. 9 button 35, and it was difficult to operate it in the sitting posture.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle seat armrest of the kind described at the beginning, which can set an armrest from an upward storage position to a horizontal front use position without requiring a button operation.

[0008]

According to the present invention, the support shafts (10, 11) protruding from the side of the seat back are inserted into a pipe (21) provided at the base of the armrest (9) to be rotatable. The cam (15, 49) is provided at the end of the support shaft (10, 11), and one end is fixed to the seat back side around the pipe (21), and the other end is provided. A spiral spring (13) whose inner diameter expands when the portion is pulled forward of the armrest is mounted, and parallel first and second arms (25, 26) hinged at intermediate positions in the armrest (9) are respectively moved back and forth. And the first arm (2
A follower (2) having a circular cross section that moves along the cam contour by the rotation of the armrest (9) about the support shafts (10, 11) at the inner end on the seatback side in 5).
7, 27a) and hinge the proximal end of the spring tensioning arm (28) to the inner end of the second arm (26);
And use a spiral spring (1
3), the first and second arms (25,
A manually operated arm (29) is hinged to the outer end of each of the 26), a button (35) is attached to the front end of the manually operated arm, and the inner ends of the first and second arms (25, 26) are further mounted. A spring (30) for biasing the portion in the support shaft direction is provided, and the follower (27,
27a) is formed with a concave portion (15a, 50) into which an arc portion (15) having a larger diameter is formed.
b) and with a locking edge (15
c) is formed, and an inclined area (151) whose diameter is gradually reduced from the arc portion (15b) is formed at the lock edge,
When the armrest (9) is turned to the upper position, the follower (27, 27a) falls into the recess (15a, 50), and the inner diameter of the spiral spring (13) is compressed, so that the pipe ( 21) and the armrest (9) is rotated forward to move the followers (27, 2).
7a) is an arc portion (15b) from the concave portion (15a, 50).
When the rider rides, the spiral spring (13) is pulled, the inner diameter is widened and the pipe is released, and the lock position can be fine-adjusted by a button operation near the cam edge in the front part, and it can be raised from the substantially horizontal use position. When the armrest (9) is rotated to the retracted position, the followers (27, 27)
a) is based on the assumption that the vehicle seat armrest comes to ride on the arc portion (15b) via the inclined region (151) without button operation.

In order to achieve the above-mentioned object, the followers (27, 27) whose recesses (15a, 50) have circular cross sections are used.
a) is formed as a lock groove (50) having a shape corresponding to (a), and an arc portion (15) of a substantially inverted L-shaped leaf spring (40).
The base (41) shaped along (b) is fixed to the arc portion (15b) near the front of the lock groove (50), and the base (41) is fixed.
The orthogonal portion (42) bent substantially at right angles toward the support shafts (10, 11) is displaced in the support shaft direction into the support shaft slit (51) formed on the bottom surface of the lock groove (50). And the bottom of the lock groove (50) is
When 27a) falls, the line perpendicular to the center point of the support shaft (10, 11) at the center point of the follower is slightly outside the edge (46) of the leaf spring (40). And the spring constant of the leaf spring (40) does not climb over the edge (46) in the event of an impact at the time of sudden braking, so that the armrest (9) is manually turned. And a side plate (45) for holding both sides of the cam (49) with a narrow gap formed on both sides of the orthogonal portion (42).

[0010]

The follower (27, 27a) having a circular section has an edge (4) below the diametrical position in the rotating direction.
6), but the plate spring (4)
0) does not bend downward and ride on. When the armrest (9) is rotated by hand during use, the follower (2)
7, 27a) climbs over the arc (15b) over the edge (46) and pulls the spiral spring (13) to maintain the unlocked state. In such an operation, the side plate (45) of the orthogonal part (42) is connected to the cam (49).
The leaf spring (40) is not displaced in order to hold the gap with the slit.

[0011]

1 to 3 show a main part of a vehicle seat armrest according to an embodiment of the present invention. In contrast to the above-mentioned conventional structure, the structure of a concave portion into which a follower is dropped when the armrest is stored is shown. Although different, the remaining portions are the same as or equivalent to those in FIGS. 5 to 7 described above, and these portions will be described using the same reference numerals without repeating description.

A lock groove 50 having a shape corresponding to the collar 27a having a circular cross section is formed as a concave portion into which a follower can be dropped when the armrest is stored, in the rear portion of the arc portion 15b of the cam 49 replaced with the cam 15 according to the present invention. Are formed. As shown in FIG. 2, a substantially inverted L-shaped leaf spring 40 comprising a base 41 extending along the arc direction of the arc portion 15b and an orthogonal portion 42 bent at a substantially right angle is disposed near the front of the lock groove. I have. The base 41 has side surfaces 43 on both sides for fixing. Also, the orthogonal portion 42
Are inserted into the slits 51 on the bottom surface of the lock groove 50 so as to be displaceable in the direction of the central axis 10, and the side plates 45 on both sides thereof hold the cam 49 with a small gap. That is, the lock groove 5
A concave portion is formed in the circular arc portion 15b continuing forward from 0 according to the thickness of the leaf spring 40, and the base portion 41 is placed, and the side surfaces 43 on both sides thereof are fixed to the side surfaces of the cam 49 with rivets 44. . Also, at the edge of the front wall of the lock groove 50,
The roundness 53 is formed so as to allow the displacement of the base 41.

The bottom surface of the lock groove 50 is formed with a rear wall 55 corresponding to the cross-sectional shape of the collar 27a so as to regulate the lock position and sufficient for position regulation. Further, when the collar 27a attached to the pin 27 as a follower having a circular cross section is dropped so that the arm 27 can be disengaged from the lock groove 50 by the rotation operation of the armrest 9, the center axis 10 A line L orthogonal to the line L1 connecting the center points of
2 is formed so as to occupy slightly outside the edge 46 of the leaf spring 40. The spring constant of the leaf spring 40 is set such that the leaf spring 40 does not get over the leaf spring 40 in the event of an impact such as during sudden braking.

The operation of the seat armrest configured as described above is as follows. The collar 27a is in contact with the edge 46 of the leaf spring 40 below the diameter position in the rotation direction (FIG. 3A).
Does not bend downward and ride up. When the armrest 9 is rotated by hand during use, the collar 27a
The armrest 9 is rotated with a small force by riding over the arc portion 15b (FIG. 3B), pulling the spiral spring 13 to hold the unlocked state. When the collar 27a reaches the lock position 152, the spiral spring 13 is compressed again to restrain the pipe 21.
Thereafter, the armrest 9 can be used, and the use position can be finely adjusted while being unlocked by operating the button 35 further downward (FIG. 3C). When the armrest 9 is rotated from the horizontal use position to the upper storage position, the collar 27a rides on the arc portion 15b via the inclined region 151 without button operation, and is automatically locked by the lock groove 50 in the upper portion. Is done. Since the side plate 45 holds the cam 49, the leaf spring 40 does not shift in the lateral direction over time.

FIG. 4 shows another embodiment.
In addition, the side surfaces 43 on both sides of the “0” are riveted at one place, and a projection 43 a with a claw of the side surface 43 is formed as a detent, and is locked in a locking hole 49 a of the cam 49.

[0016]

As described above, according to the present invention, the armrest can be pulled out without any button operation, the operation becomes easy, and therefore the operation is not distracted and the driving becomes safe. The setting of the leaf spring characteristics prevents the armrest from suddenly popping out due to sudden braking or the like.

[Brief description of the drawings]

FIG. 1 is a side view of a locking cam of a vehicle seat armrest according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a leaf spring attached to the cam.

FIG. 3 is a diagram illustrating a lock operation of the armrest.

FIG. 4 is a perspective view of a locking leaf spring according to another embodiment.

FIG. 5 is a perspective view showing an internal structure of a conventional seat armrest.

FIG. 6 is a partially cutaway perspective view showing a spindle portion of the internal structure.

7 is a side view of the cam having the conventional structure shown in FIGS. 5 and 6. FIG.

[Explanation of symbols]

 Reference Signs List 9 armrest 10 central axis 11, 21 pipe 13 spiral spring 15b arc portion 15c lock edge 27 pin 27a collar 40 leaf spring 41 base 42 orthogonal portion 45 side plate 46 edge 49 cam 50 lock groove 51 slit

Claims (1)

(57) [Scope of request for utility model registration] 1. A support shaft protruding from a side portion of a seat back is inserted into a pipe provided at a base of an armrest to be rotatably supported. A cam is provided at an end of the support shaft, and a cam is provided around the pipe. Is
One end is fixed to the seatback side, and the other end is equipped with a spiral spring whose inner diameter expands when pulled forward of the armrest. The first and second parallel hinges are hinged at intermediate positions in the armrest, respectively. Are arranged in a direction orthogonal to the armrest front-rear direction, and a circular section having a circular cross section that moves along the cam contour by rotation of the armrest about the support shaft is provided at the inner end of the first arm that is the seatback side. A follower is mounted, the proximal end of the spring tensioning arm is hinged to the inner end of the second arm, and the distal end of the arm is supported by the end of the spiral spring.
And a button for attaching a button to the front end of the manual operation arm, and further urging the inner ends of the first and second arms in the support axis direction. Forming a recess in which the follower falls into an upper portion of the cam profile, forming a larger-diameter arc portion toward the front from the recess, and forming a locking edge in the front portion; When the armrest is turned to the upper position, the follower falls into the recess, and the inner diameter of the spiral spring is compressed, thereby restraining the pipe. When the follower rides on the arc from the recess by rotating the armrest forward, the spiral spring is pulled, the inner diameter is widened, and the pipe restraint is released. The lock position can be fine-adjusted by button operation near the cam edge of the minute, and when the armrest is rotated from the almost horizontal use position to the upper storage position, the follower passes through the inclined area without button operation. In the vehicle seat armrest adapted to ride on the arc portion, the recess is formed as a lock groove having a shape corresponding to the follower having the circular cross section, and the recess is formed along the arc portion of the substantially inverted L-shaped leaf spring. Fixing the base of the shape to the arc portion near the front of the lock groove,
An orthogonal portion bent at a substantially right angle toward the support shaft with respect to the base portion is inserted into the support shaft direction slit formed on the bottom surface of the lock groove so as to be displaceable in the support shaft direction; When the follower falls down,
A line perpendicular to the center point of the support shaft at the center point of the follower is formed so as to occupy slightly outside the edge of the leaf spring, and the spring constant of the leaf spring is set at the time of sudden braking. In the impact at the follower does not climb over the edge,
A seat armrest for a vehicle, wherein the armrest is set so as to get over by a manual rotation operation, and side plates are formed on both sides of the orthogonal portion to hold both sides of the cam with a narrow gap therebetween.