JPS635946Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for adjusting the elevation of a seat cushion in a seat.

Seats whose seat cushions can be raised and lowered so as to provide the optimal sitting posture according to the body of the occupant are well known, and there are seats in which only the front region of the seat cushion can be raised and lowered, or seats in which only the rear region of the seat cushion can be raised and lowered. There are a wide variety of types, including those that raise and lower the seat cushion, and those that raise and lower the entire seat cushion. Such seats are widely used in vehicle seats for the purpose of minimizing fatigue of the occupant even when seated for long periods of time.

As for the above-mentioned seats in which only the front area of the seat cushion can be raised and lowered, there have already been proposals for seats in which the raising and lowering can be adjusted virtually steplessly. This provides the advantage of being able to virtually freely choose the optimal sitting position. However, for other types of seats, namely seats where the rear area of the seat cushion can be raised and lowered, or the entire seat cushion can be raised and lowered, there is no known seat cushion that allows stepless adjustment of the seat cushion. Improvement was desired.

This invention was made based on the above recognition,
It is an object of the present invention to provide a seat cushion raising/lowering adjustment device that can adjust the rear region of the seat cushion substantially steplessly.

Advantageous embodiments of the invention will be described below with reference to the drawings. In this embodiment, the present invention is applied to a vehicle seat, and the illustrated seat has a seat cushion whose rear region is raised and lowered according to the present invention, and whose front region is also raised and lowered. The overall configuration will be explained in detail below.

The seat in this example has a seat cushion 1 shown in chain lines and a seat back (not shown), and the seat cushion 1 is raised and lowered by an elevation adjustment device according to the present invention shown in solid lines. Below each side region of the seat cushion 1 are two seat cushion support members 2 extending parallel to each other;
3 is arranged, and the support members 2 and 3 in this example are formed in a rail shape and can slide in the front and rear direction of the seat while fitting into a lower rail (not shown) fixed to the floor of the vehicle body. It's becoming like that. A first front bracket 4 is fixed to the front region of the support member 2 on the near side in the drawings (hereinafter referred to as the first support member), and the bracket 4 is rotated by a first handle 5. The first pinion 6 is pivotally supported (in this specification, "front" and "rear"
(Unless otherwise specified, "front" and "rear" refer to the front and rear directions of the seat.) One end of a support shaft 7 extending in the lateral direction of the seat is rotatably supported on the first front bracket 4, and a first gear 8 formed in the shape of a sector gear is fixed to the support shaft 7. , the teeth of this gear 8 mesh with the pinion 6 described above. Further, one end of a first rotating member 9 formed in a link shape is pivotally attached to the first gear 8 by a pin 10, and the other end of the rotating member 9 is connected to a seat shoe by a screw 11 via a spacer 12. It is pivoted to the frame of section 1.

On the other hand, the support member 3 on the back side in the drawings (hereinafter referred to as the second support member) also has a second support member in its front region.
A front bracket 13 is fixed, and the other end of the support shaft 7 described above is rotatably supported on the rising flange portion of this bracket 13. Further, one end of a second rotating member 14 is fixed to the support shaft 7 near the other end side, and a sector gear-shaped second rotating member 14 is attached to the other end side of the rotating member 14 via a pin 15.
A gear 16 is pivotally mounted. In this case, the axis of the pin 10 that pivotally connects the first rotating member 9 to the first gear 8 and the axis of the pin 15 that pivotally connects the second gear 16 to the second rotating member 14 coincide with each other. The second gear 16 and the first rotating member 9 are configured to be able to rotate around a common axis X. Furthermore, this axis X and the axis of the support shaft 7 are located parallel to each other. Reference numeral 17 denotes a front rod that is fixed at each end to the first rotating member 9 and the second gear 16, and extends in the lateral direction of the seat.

A second pinion 18 is meshed with the second gear 16, and this pinion 18 is rotatably supported by a support bracket 19 fixed to the frame of the seat cushion 1, and is rotated by a second handle 20. It is becoming more and more common. Support bracket 1
9 is fixed to the frame of the seat cushion 1 by screws (not shown) fitted into the mounting holes 21 and 22.

The first and second pinions 6, 18 described above are connected to the first and second handles 5, 20, respectively, via brake devices 23, 24 (for example, spring couplers), which are known per se. 23 and 24 transmit the rotation of the handles 5 and 20 to the pinions 6 and 18, respectively, and rotate each gear 8 and 16, but the rotational force applied to each gear 8 and 16 is It has a function of preventing rotation of the handle without transmitting information to the handles 5 and 20.

A first rear bracket 25 and a second rear bracket 26 are respectively fixed to the rear regions of the first and second support members 2 and 3, and a rear rod 27 extending in the lateral direction of the seat is attached to these brackets 25 and 26. Each end region of is rotatably supported. A rotating member (hereinafter referred to as a third rotating member) 28 formed in the shape of an angle member is pivoted or fixed to the end of the rear rod 27 on the second support member side. This third rotating member 28
Each end of the connecting member 31 is pivotally connected to each lower end of the second gear 16 mentioned above via pins 29 and 30, and thus the second gear 16 is connected to the connecting member 31.
It is connected to the third rotating member 28 via. Although the connecting member 31 in this example is formed into a rod shape, it goes without saying that it may be formed in any other suitable shape.

Reference numerals 32 and 33 indicate fourth and fifth rotating members having one end fixed to the rear rod 27 near each end thereof. A first support shaft 34 is fixed to the fourth rotation member 32 and the third rotation member 28, and a second support shaft 35 is fixed to the fifth rotation member 33. , 35 each have a support bracket 3 formed in a substantially U-shape.
6 and 37 are pivotally connected, and these support brackets 3
6 and 37 are fixed to the frame of the seat cushion 1, respectively. Numerals 38 and 39 are mounting holes for fixing these support brackets 36 and 37 to the frame of the seat cushion. Also, 4
0 is an ear 41 protruding from the second rear bracket 26
and the connecting member 31 at each end thereof, and the spring 40 serves to bias the connecting member 31 rearward, that is, to the right in the figure.

The seat cushion elevation adjustment device in this example is constructed as described above, and its operation will be explained below.

First, when attempting to raise only the front portion of the seat cushion 1, the first handle 5 is rotated counterclockwise (in the direction of arrow A). This rotation is transmitted to the first pinion 6 via the brake device 23,
As the pinion 6 rotates, the first gear 8 rotates clockwise around the axis of the support shaft 7. As a result, the first rotating member 9 rises, the support shaft 7 and the second rotating member 14 rotate clockwise, and as a result, the second gear 16 also rises. At this time, the axes X of each pin 10 and 15 are aligned, and since this axis X and the axis of the support shaft 7 are parallel, the first rotating member 9 and the second gear 16 are completely similar. It moves upward with form. Moreover, the second
Since the gear 16 and the second pinion 18 are always in mesh with each other, the second gear 16 does not rotate freely around the pin 15.
The first rotating member 9, which is connected to the gear 16 via the front rod 17, also does not rotate freely around the pin 10. Thus, by rotating the first handle 5, the seat cushion 1 is tilted around the axes of the two support shafts 34 and 35 provided at the rear thereof, and the front portion of the seat cushion is raised.
Turn the first handle 5 clockwise (opposite direction to arrow A)
When the seat cushion 1 rotates to the support shaft 34,
It is natural that the front part of the robot lowers while tilting around 35.

Next, the operation for raising the rear part of the seat cushion 1 will be explained. In this case, the second handle 20 is rotated clockwise (in the direction of arrow B) in the figure. As a result, the second pinion 18 also rotates clockwise, and the second gear 16 that meshes with this rotates the pin 1.
Rotate counterclockwise around 5.

When the second gear 16 rotates as described above, the connecting member 31 is actuated in the direction of arrow C, thereby causing the third
The rotating member 28 rotates counterclockwise around the rotation axis of the rear rod 27. As a result, the first support shaft 34, the support bracket 36, and the fourth rotation member 32
rotates counterclockwise around the axis of the rear rod 27, and the rear rod itself also rotates counterclockwise, and accordingly, the fifth rotating member 33, second support shaft 35, and support bracket 37 also rotate counterclockwise. rotate in the direction. For this reason, each support bracket 36, 37
The rear part of the seat cushion, which is fixed to the seat cushion, can be lifted up without any problem. Of course, if the second handle 20 is rotated counterclockwise (in the direction opposite to arrow B), the rear part of the seat cushion 1 will be lowered. Generally, when raising the rear part of the seat cushion 1, it is necessary to lift the seat cushion against its own weight, or against the weight of the seated person in addition to the weight of the seated person. , a large amount of force is required to operate the seat cushion, whereas a small amount of force is required to lower the seat cushion. In consideration of this point, the above-mentioned tension spring 40 is provided in this example, and when moving the connecting member 31 in the direction of arrow C in order to raise the rear part of the seat cushion 1, the tension spring 40 is has come to assist in this movement. Therefore, even when lifting the rear part of the seat cushion, this operation can be performed with a relatively small force.On the other hand, when lowering the seat cushion, the force of the tension spring 40 is Although it is necessary to rotate the second handle 20, at this time, the above-mentioned weight helps the rotation of the second handle 20, so that the operation can be performed with a relatively small force. In addition, each handle 5, 20 and each pinion 6, 18 are connected via the previously described brake devices 23, 24, respectively, so that forces acting on the seat cushion 1, such as its own weight or the seated person's Even if weight acts on each pinion, these do not rotate, and the seat cushion 1 can always be maintained in a desired state.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment and can be configured with various modifications. For example, instead of directly pivoting the first rotating member 9 to the frame of the seat cushion 1, a roller is rotatably supported in the tip region of the first rotating member 9, and the roller is rotatably supported around the axis of the pin 10. It is also possible to form an arcuate long hole in the frame of the seat cushion 1, and to fit the roller into the long hole so as to be rotatable. According to this configuration, when the second handle 20 is rotated, for example, in the direction of arrow B and the second gear 16 is rotated counterclockwise around the pin 15, the front rod 1 is attached to the second gear 16.
The first rotating member 9 connected via the pin 10
The roller supported at the tip of the rotating member 9 moves in the arc-shaped elongated hole of the seat cushion frame. For this reason,
The above rotation of the first rotation member 9 makes it possible to prevent the front portion of the seat cushion 1 from moving up and down. Further, in the illustrated embodiment, the seat cushion support member is formed in the shape of a rail, but of course this support member may be formed in other shapes, and the floor of the vehicle itself may be used as the seat cushion support member. It is possible.

Further, in the above embodiment, a specific example was shown in which a configuration for raising and lowering the front part of the seat cushion was added to the configuration according to the present invention for raising and lowering the rear part of the seat cushion. It goes without saying that it is also possible to configure it so that it can be raised and lowered.

As can be seen from the above explanation, according to the configuration of the present invention, the rear part of the seat cushion is raised and lowered by the gear rotated by the handle, so that its position can be adjusted virtually steplessly. The seat cushion can be adjusted to allow the seat occupant to position the rear part of the seat cushion at a desired position.

[Brief explanation of drawings]

The drawing is a perspective view showing an example of a seat equipped with a seat cushion elevating device according to the present invention. 1...Seat cushion, 3...Support member, 1
6... Gear, 18... Pinion, 20... Handle, 28... Rotating member.

Claims (1)

[Scope of utility model registration request] A handle rotatably supported on a seat cushion, a pinion rotationally driven by rotation of the handle, and a gear meshing with the pinion and rotatably supported on a support member for the seat cushion. , a rotating member connected to the gear and rotatably supported relative to the support member in the rear region of the seat cushion, the rotating member directly or supporting the other member. A seat cushion elevation adjustment device, characterized in that the seat cushion is connected to the seat cushion via a seat cushion.