JPH021079Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a thigh support device for a vehicle seat or the like.

In recent years, in vehicle seats such as automobiles, it has become possible to adjust the support height of the front part of the seat cushion, that is, the part that supports the thighs, according to the body length of the seated person, especially the length of the legs. Various so-called thigh support devices have been proposed and implemented.

Conventionally, this type of seat thigh support device has been widely adopted in which the operating mechanism is a screw mechanism, and the height is adjusted by rotating an operation dial. When adjusting the height, you have to turn the control dial quite a few times, making the operation very complicated.
Furthermore, since the mechanism is complicated, there are many parts, which increases the weight and costs.

The present invention has been devised in view of these points, and it is an object of the present invention to provide a thigh support device that is easy to operate and has a simple configuration.

That is, the present invention includes a movable frame, the rear ends of which are pivotally mounted to the front side of both sides of the cushion frame so as to be able to rotate up and down, and a movable frame which is pivotally supported in the front-rear direction by the front side of the cushion frame. The actuating plate body has a continuous slope and has a threaded peripheral edge, which is attached to the operating rod. It has a substantially L-shaped link member, one end of which is engaged and connected to the front side of the movable frame, and the other end of which is engaged with the threaded edge of the operating plate. The link member is rotated in the vertical direction by continuous changes in the actuating plate accompanying the rotational operation, thereby raising the movable frame.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, 1 indicates the entire seat of a car, for example, and the seat 1 is made up of a seat cushion 2 and a seat pack 3 connected via a reclining device 4, and a headrest 5 is disposed on the top of the seat pack 3. Front part 2 of seat cushion 2
A is equipped with a thigh support device 6 according to the present invention.

This thigh support device 6 has a substantially U-shaped movable frame 8 disposed on the upper front surface of a cushion frame 7, and the rear ends 8a and 8b of both sides of the movable frame 8 are arranged in front of both sides 7a and 7b of the cushion frame. The movable frame 8 and the cushion frame 7 are pivotally supported by shaft pins 9a and 9b so as to be freely raised and lowered, and an adjustment mechanism 6a is disposed between the movable frame 8 and the cushion frame 7.

This adjustment mechanism will be described in detail below.

A pair of left and right brackets 10a, 10b are fixed to the back side of the front side 7c of the cushion frame 7, and a shaft 11 is disposed between the brackets 10a, 10b.
is rotatably supported, and a substantially L-shaped link member (hereinafter referred to as L-shaped link member) 12 is mounted on one side of the shaft 11 in an inverted manner at its central portion 12c. , this L-shaped link member 1
A through hole 12a' is bored at the tip of the horizontal part 12a of 2, and a notched engagement part 12 is formed at the lower end of the vertical part 12b.
b′ is formed. Further, on the other side of the shaft 11, an I-shaped link member 13 is pivotally attached at the rear thereof, facing the horizontal portion 12a of the L-shaped link member 12, and the tip of this I-shaped link member 13 is A through hole 13a is bored in the hole 13a.

The distal ends of both link members 12 and 13 are connected to the movable frame 8. That is, both link members 1 are provided on the back side of the front side portion 8c of the movable frame 8.
Corresponding to 2 and 13, U-shaped brackets 14a,
14b is fixed, and these brackets 14a, 14
Elongated holes 15a and 15b, which are long in the front-rear direction, are bored at the ends of each side piece of b.
Through holes 12a', 13a at the tips of both link members 12, 13 are communicated with pins 16a, 15b.
6b is inserted, and both link members 12, 13 and brackets 14a, 14b are engaged and connected. still,
Through holes 12a', 13a of both link members 12, 13 and elongated holes 15a, 15b of brackets 14a, 14b
In other words, elongated holes may be formed in place of the through holes 12a' and 13a, and through holes may be formed in place of the elongated holes 15a and 15b. In either case, as will be described later, both link members 12 , 13, the pin 16
a, 16b will be moved relative to the elongated hole.

Further, a cylindrical bracket bearing 18 is fixed to the lower surface side of the front side part 7c of the cushion frame 7 at a position corresponding to the L-shaped link member 12 with a screw 19. The small diameter portion 20a of the stepped operation rod 20, which has a small diameter, is rotatably inserted and supported, and the rear end corresponds to the lower side of the L-shaped link member 12, and a continuous A cylindrical bracket 22 having a spring washer-shaped operating plate 21 having an inclined surface and a threaded peripheral edge fixed to the peripheral surface is fitted, and the pin 23 is inserted.
It is fixed by. The peripheral edge of the actuating plate 21 is engaged with the engaging portion 12b' of the L-shaped link member 12.

Further, a dial 24 is provided at the tip of the operating rod 20 protruding from the front side 7c of the cushion frame 7.
is installed.

Next, the operation of the thigh support device of this example configured as described above will be explained.

First, as shown in FIG. The portion 12a is located at a slight forward inclination, and the movable frame 8 is at the lowest position with respect to the cushion frame 7. That is, the front portion 2a of the seat cushion 2 is in a low position, and the entire seat surface is in a flat state.

To set the front portion 2a of the seat cushion 2 to a desired height from this state, the operating rod 20 is rotated using the dial 24 in the direction in which the operating plate 21 is twisted, that is, in the forward tilting direction. With the continuous change in the forward tilting direction of the operating plate body 21 due to the rotation of the operating rod 20, the vertical portion 12b of the L-shaped link member 12, which is in mesh with this peripheral edge, is moved forward. As a result, the L-shaped link member 12 is connected to the shaft 11.
The horizontal portion 12a is rotated together with the shaft 11 (clockwise in the figure), so that the horizontal portion 12a is tilted high forward.Meanwhile, the I-shaped link member 13 is also rotated integrally and tilted high forward through the shaft 11. The movable frame 8 connected to the link members 12 and 13 is rotated in the upright direction about the pivot pin 9 (see B in the same figure), and the front portion 2a of the seat cushion 2 is pushed up and tilted forward. will be done.

Then, by further rotating the operating rod 20, the periphery of the forward-most inclined part of the operating plate 21 becomes the L-shaped link member 1.
2, the L-shaped link member 12 is further rotated to increase the angle of inclination of the horizontal portion 12a, and the I-shaped link member 13 is similarly inclined. The movable frame 8 is positioned at the uppermost position (see C in the same figure), and the front portion 2a of the seat cushion 2 is pushed up to the highest position to form a seat surface with a high front portion.

Furthermore, in order to set the front portion 2a of the seat cushion 2 to a lower position from this state, the operating rod 20 may be rotated in the opposite direction.

As described above, after adjusting the movable frame 8, that is, the front part 2a of the seat cushion 2 to a desired height by rotating the operating rod 20 with the dial 24, when the rotation of the operating rod 20 is stopped, the movable frame 8 is adjusted to that height. It will be fixed in place. At this time, the front part of the cushion 2a
Even if rotational force is applied to both link members 12 and 13 due to the load applied to the movable frame 8 from Since the actuating plate 21 is constantly engaged and pressed in a direction perpendicular to the rotational direction of the actuating plate 21, no rotational force is transmitted to the actuating plate 21. Therefore, the actuating plate 21 rotates unnecessarily together with the operating rod 20, and the movable frame 8 The height will never change.

According to the thigh support device of this example configured as described above, the height of the movable frame 8 can be adjusted steplessly by operating the operating rod 20 within the range of approximately one rotation of the operating plate 21. and a dial 24 for rotating the operating rod 20 in this operation.
The number of rotations required for operation is small, improving operability, and the front portion 2a of the seat cushion 2 can be quickly and accurately set to the desired support height of the seated person.

As described above, according to the present invention, the push-up height of the movable frame relative to the cushion frame can be adjusted steplessly by an extremely simple operation of only slightly rotating the operating rod, and the front part of the seat cushion can be adjusted steplessly. Since the desired support height can be easily and accurately set, the seated person can obtain the optimal sitting posture, and when sitting for a long time, the sitting posture can be easily changed to the desired state. It has great practical effects, as it requires fewer parts and does not require precision parts such as screws, making it possible to reduce costs and weight. Furthermore, in the thigh support device of the present invention, the rear part of the movable frame is pivotally connected to the cushion frame, and the front part is engaged and connected to the link member pivotally supported by the cushion frame. It has a structure in which it is supported by the cushion frame, so that the load applied to the movable frame is distributed back and forth, ensuring sufficient strength even against large loads. In addition, since the rear ends of the movable frame are pivoted to both sides of the cushion frame, the front part of the seat cushion can be moved up and down over its entire width. It also has the effect of providing reliable thigh support.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a seat equipped with the thigh support device of the present invention, Fig. 2 is a perspective view showing an embodiment of the thigh support device of the present invention, Fig. 3 is an exploded perspective view of the same, Fig. 4 5 is a perspective view showing an example of an actuating plate, and FIGS. 5A to 5C are longitudinal sectional side views for explaining the operation of the thigh support device of the present invention. In the figure, 6 is a thigh support device, 7 is a cushion frame, 8 is a movable frame, 12 is an L-shaped link member as a link member, 20 is an operating rod, 21
is the actuating plate.

Claims (1)

[Claims for Utility Model Registration] A movable frame whose rear ends on both sides are pivotally attached to the front side of both sides of the cushion frame so as to be able to rotate up and down; an operating plate having a continuous slope and a spiral peripheral edge, which is attached to an operating rod that is pivotally supported by the cushion frame; and a substantially L-shaped link member whose one end is engaged and connected to the front side of the movable frame and whose other end is engaged with the spiral edge of the actuating plate. A thigh support device comprising: a thigh support device in which the link member is vertically rotated by continuous changes in the actuating plate as the operating rod is rotated, and the movable frame is moved up and down.