JPH0350787Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is equipped with a side support mechanism built into both sides of the seat back or seat and a surface pressure mechanism that changes the surface pressure. This invention relates to a seat device operated by two output shafts.

[Conventional technology]

Conventionally, in order to operate a side support mechanism or surface pressure mechanism (lumbar support mechanism for the backrest, seat pressure adjustment mechanism or thigh support mechanism for the seat), two output shafts were required to act on each mechanism. Ta. In the case of a so-called power seat that uses a motor, one motor is required for each mechanism.

[Problem to be solved]

In order to operate two or more mechanisms built into a conventional seat, each mechanism required one output shaft rotated by a motor or knob, which made the mechanism complicated and caused the mechanism inside the seat to become more complicated. The number of parts increased, leading to an increase in weight.

This idea was devised in view of the above circumstances, and allows two mechanisms to be operated with one output shaft.
It is an object of the present invention to provide a seat device that reduces the space occupied by various mechanisms in the seat and also reduces the weight of the entire seat.

[Means for solving problems]

In order to achieve the above-mentioned purpose, this invention attaches two drive gears to the output shaft of a motor or knob,
A chain is passed between each drive gear and a driven gear interlocked with the drive gear to constitute first and second rotational force transmission mechanisms, and at least one of each drive gear and driven gear is configured as a unidirectional gear. However, one rotational force transmission mechanism is configured to rotate only when the output shaft rotates in the forward direction, and the other rotational force transmission mechanism rotates only when the output shaft rotates in the reverse direction. First and second actuating mechanisms are installed to operate each mechanism.

[Effect]

When one output shaft is rotated in one direction, only one of the two driving gears attached to this output shaft rotates a driven gear by a chain. The driven gear rotated through the chain activates the actuation mechanism to actuate the side support mechanism. When the output shaft is rotated in the other direction, the other driving gear rotates the driven gear through the chain, and the rotated driven gear operates the actuating mechanism to operate the surface pressure mechanism.

〔Example〕

Preferred embodiments of this invention will be described below with reference to the drawings. In Figure 1, the output shaft 2 of motor 1
The driving gears 5 and 6 of the first rotational force transmission mechanism 3 and the second rotational force transmission mechanism 4 are attached to the respective drive gears 5 and 6, and chains 9 and 6 are connected between the respective driving gears 5 and 6 and the driven gears 7 and 8, respectively. 10 is given out. The first rotational force transmission mechanism 3 has a chain 9 running between the drive gear 5 and the driven gear 7, and the second rotational force transmission mechanism 4 has a chain 10 running between the drive gear 6 and the driven gear 8. It is something that was passed around.
These first and second rotational force transmission mechanisms 3 and 4 are attached to a bracket 11. This bracket 11
is attached to a frame 12 constituting the seat. Further, the motor 1 is also attached to this bracket 11.

Side support mechanism 1 with second rotational force transmission mechanism 4
3 will be explained based on FIGS. 2 and 3. Second actuation mechanism 1 provided on driven gear 8
4 actuates the side support mechanism 13, and the second actuating mechanism 14 has an eccentric cam 17 fixed to the shaft of a gear 16 having teeth that mesh with teeth on the outer circumferential surface of a rotating shaft 15 provided on the driven gear 8. The rotating member 1 is arranged so that it always comes into contact with the outer circumferential surface of the eccentric cam 17.
8 is rotatably attached to a bracket 19.
One end of the rotating member 18 is rotatably attached to the bracket 19, and one end of a support member 13A is fixed to the center of rotation of the rotating member 18. It is rotatable. The other end of the support member 13A is rotatably attached to the bracket 20.
Further, a connecting rod 21 is attached to the free end side of the rotating member 18.
One end is rotatably attached, and the connecting rod 2
1 is rotatably attached to a link 22, and the other end of this link 22 is rotatably attached to a bracket 23. One end of the other support member 13B is fixed to the center of rotation of the link 22 attached to the bracket 23, and one end of the support member 13B is attached to the bracket 23 so as to be rotatable. The other end of the support member 13B is rotatably attached to a bracket 24. or,
The connecting rod 21 is always pulled toward the right in FIG. 2 by a spring 25. The base end of the spring 25 is attached to the frame 12. When the driven gear 8 rotates and its rotational force is transmitted to the eccentric cam 17, when the surface of the eccentric cam 17 farthest from the eccentric rotation center comes into contact with the rotating member 18, the free end of the rotating member 18 The side will rotate counterclockwise in Figure 2,
At this time, the connecting rod 21 is moved toward the left side in the figure by the spring 25.
As a result, the support members 13A and 13B on both sides rotate in a direction toward each other. When the surface of the eccentric cam 17 closest to the center of rotation comes into contact with the rotating member 18, the support members 13 on both sides are moved by the action of the spring 25.
A and 13B will rotate in the direction away from each other.

The driven gear 7 of the first rotational force transmission mechanism 3 is provided with a rotating shaft 26, and an eccentric cam is fixed to the rotating shaft 26. A bracket 28 is fixed to the frame 12, one end of a rotating member 29 is rotatably attached to the bracket 28, and an eccentric cam 27 is brought into contact with the back surface of the rotating member 29. When the eccentric cam 27 rotates, when the surface of the farthest part from the center of rotation abuts the rotating member 29, the rotating member 29 moves to the fourth position.
When the eccentric cam 27 rotates in the direction of the arrow in the figure and the surface of the eccentric cam 27 closest to the center of rotation comes into contact with the rotating member 29, the rotating member 29 retreats. The surface pressure mechanism 30 shown in FIG. 4 has an S spring 31 stretched on a rotating member 29 provided on both sides, and has a lumbar support mechanism that presses the lumbar vertebrae of the seated person as the S spring 31 moves forward. It consists of The eccentric cam 27 and the rotating member 29 constitute a first actuation mechanism 32 .

Although polygonal cams are used as the eccentric cams 17 and 27, it is also possible to use oval cams so as to be locked at a predetermined position. Further, as the chains 9 and 10 and the drive gears 5 and 6, a bicycle chain and a freewheel can also be used. That is, each drive gear 5, 6 or driven gear 7, of the first and second rotational force transmission mechanisms 3, 4
8 is configured as a one-way gear (corresponding to a freewheel) that can rotate in only one direction.

In the embodiment shown in the drawings, the side support mechanism 1
3 is a mechanism that supports both sides of the back of the seated person, and the surface pressure mechanism 30 is a lumbar support mechanism, but if this is applied to the seat of the seat, the side support mechanism 13 can be used as a hip support mechanism or a thigh support mechanism. The surface pressure mechanism 30 can also serve as a mechanism that supports both sides, and can also serve as a mechanism that adjusts the sitting pressure or a side support mechanism that moves the lower surface of the thigh up and down.

〔effect〕

As explained above, according to this invention, two drive gears are attached to the output shaft of the motor or knob,
A chain is passed between each drive gear and a driven gear interlocked with the drive gear to constitute first and second rotational force transmission mechanisms, and at least one of each drive gear and driven gear is configured as a unidirectional gear. However, one rotational force transmission mechanism is configured to rotate only when the output shaft rotates in the forward direction, and the other rotational force transmission mechanism rotates only when the output shaft rotates in the reverse direction. Since the first and second actuating mechanisms are installed to actuate each mechanism, it becomes possible to alternately actuate the two mechanisms, that is, the side support mechanism and the surface pressure mechanism, by one output shaft. This simplifies the mechanism incorporated into the seat, saves space, and ultimately reduces the weight of the seat as a whole.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the main parts, Fig. 2 is a perspective view showing an example of the side support mechanism, Fig. 3 is an explanatory diagram of how the second actuation mechanism operates the side support mechanism, and Fig. 4 shows the surface pressure mechanism and the side support mechanism. 1 is a perspective view showing the relationship between the drive gear and the chain, and FIG. 5 is a simplified front view showing the relationship between the drive gear and the chain. 2... Output shaft, 3... First rotation mechanism, 4... Second rotation mechanism, 5, 6... Drive gear, 7, 8... Driven gear, 9, 10... Chain, 13... Side support mechanism, 14...Second operating mechanism, 30... Surface pressure mechanism, 32... First operating mechanism.

Claims (1)

[Claims for Utility Model Registration] In a seat device equipped with a side support mechanism built into both sides of the seat back or seat and a surface pressure mechanism that changes surface pressure, two driving gears are provided on the output shaft of a motor or knob. is installed, and a chain is passed between each driving gear and a driven gear that is interlocked with the driving gear to constitute the first and second rotational force transmission mechanisms, and at least one of each driving gear and driven gear is connected in one direction. Consisting of gears, one rotational force transmission mechanism rotates only when the output shaft rotates in the forward direction, and the other rotational force transmission mechanism rotates only when the output shaft rotates in the reverse direction. Each driven gear is equipped with a side support mechanism and a surface pressure mechanism. 1. A seat device comprising first and second actuating mechanisms that operate each mechanism by acting on the seat device.