JPH01175536A - Adjusting device for seat - Google Patents

Abstract

PURPOSE:To facilitate the adjusting operation of the adjusting mechanism of various seats by providing a common adjustment operating device which can be selectively engaged with two or more seat adjusting mechanism on the side of the cushion seat of a vehicle. CONSTITUTION:As an operating knob 68 is rotated counterclockwise, a swinging lever 22 is rotated clockwise via a drive shaft 66 and a drive gear 64 and a connecting link 24 is lifted up lifting the front portion of a cushion seat. Also, as the knob 68 is rotated clockwise, the lever 22 is rotated counterclockwise lowering the cushion seat. Then, as the knob 68 is pulled to the full, the gear 64 is pulled off of a shaft hole 16a and, as the knob 68 is moved to a shaft hole portion 61b, a thin shaft portion 66a comes off of a groove 71c. At this time, if the knob 68 is returned, the shaft 66 is fitted into the shaft hole 16b and, then, as the knob 68 is rotated clockwise, a swinging link 46 is rotated clockwise rotating a swinging lever 42 counterclockwise to lower the rear portion of the cushion seat. On the contrary, as the knob 68 is rotated counterclockwise, the rear portion of the cushion seat is lifted up.

Description

TECHNICAL FIELD The present invention relates to a seat adjustment device that can adjust the height of a cushion seat, the inclination angle of a seat back, etc. of a vehicle seat, particularly a front seat of a passenger car.

"Prior Art and Problems Therewith" A conventional front seat for a passenger car is formed so that the front and back position can be adjusted by a seat track, and the inclination angle of the seat back can be adjusted (reclined). The seat track consists of a lower rail fixed to the vehicle floor surface in the front-rear direction, and an upper rail slidably fitted to the lower rail.

Furthermore, in recent years, in order to obtain a more comfortable and safe driving position, various seats have been proposed that are equipped with various seat adjustment mechanisms, such as a cushion seat height adjustment mechanism, a seat back lumbar support, and a side support adjustment mechanism. In this type of seat adjustment mechanism, an operating knob or lever for operating each adjustment mechanism is provided on the lower side of the cushion seat.

However, since the space in which this operating knob can be installed is limited, if multiple operating knobs are provided, each operating knob will be too close to each other, and when operating the - operating knob, the other operating knobs will get in the way. there were. Furthermore, if the diameter of the operating knobs is reduced in order to increase the distance between the operating knobs, the torque required for operation will increase or the amount of rotation must be increased, and in either case, operability is impaired.

``Object of the Invention'' The present invention was made based on the above-mentioned problem awareness, and it is an object of the present invention to provide a seat adjustment device with good operability that can easily adjust various seat adjustment mechanisms such as seat height and inclination angle. With the goal.

"Summary of the Invention" The present invention has been made with an eye to the fact that operability is improved if there are fewer operating members for operating the adjustment mechanism. In a seat adjustment device that is equipped with two or more seat a-tube mechanisms for adjusting the overall height, seat back inclination angle, etc., and the adjustment operation parts of these seat adjustment mechanisms are located on the side of the cushion seat, two or more seat adjustment mechanisms are installed on the side of the cushion seat. The present invention is characterized by providing a common adjustment operating device that can be selectively engaged with the above seat adjustment mechanisms.

It is characterized by what it did.

"Invention example" The invention will now be described with reference to the illustrated embodiments.

FIG. 1 is a perspective view showing essential parts of an embodiment of an automobile seat to which the seat adjustment device of the present invention is applied, and FIG. 2 is a side view of the same embodiment.

The present automobile seat has a cushion seat and a seat back mounted on the seat track 10, but only the portions that support these seats are shown in the drawing. The seat track 10 consists of lower rails 12, 12 fixed in parallel to the floor of an automobile at predetermined intervals and upper rails 14 slidably fitted to these, respectively. Support plates 16 are fixed onto both upper rails 14, respectively. In the figure, the left support plate 16
A front lift mechanism 20 and a rear lift mechanism 40 are provided on the inner surface of the support plate 16 , and a common adjustment operating device 60 is provided on the outer surface of the support plate 16 in the vicinity of the front lift mechanism 20 .

The front lift mechanism 20 includes a swing lever 22 that is swingably supported on the support plate 16 via a support shaft 21, and a swing lever 22 that is swingably supported on the swing lever 22 via a support shaft 23. The main component is a connecting link 24. Swing lever 2
A fan-shaped sector gear (internal teeth) 22a centered on the support shaft 21 is formed at the tip of the rotor 2, and an intermediate small gear 26a meshes with the internal teeth 22a. This intermediate small gear 26a is attached to a rotating shaft 26, and the rotating shaft 26 is attached to a brake device 80 attached to the support plate 16. Rotating shaft 26 protruding outward from this brake device 80
An intermediate large gear 26b is fixed to.

A swing lever 22 is also provided on the inner surface of the support plate 16 on the other side.
) A swinging lever 32 corresponding to the articulating link 24) An articulating link 34 is attached. The swing lever 22 and the swing lever 32 on the other side are connected by a connecting bar 27 extending from the support shaft 21, and the link 24 and the link 34 on the other side are connected to a cushion seat via the shaft. frames are connected. Therefore, when the swing lever 22 swings, the swing lever 3 on the other side is
2 also swings, and the articulating links 24.32 raise and lower the front part of the cushion seat.

The rear lift mechanism 40 is provided on the inner surface of the support plate 16.
A swing lever 42 is swingably supported via a support shaft 41.
A swing lever 52 corresponding to this swing lever 42 is also pivotally supported on the inner surface of the support plate 16 on the other side. The swing levers 42,52 are connected by a connecting bar 43 extending from the support shaft 41. Swing lever 42
．． A cushion seat frame is attached to the tip of the cushion seat 52 via a shaft. Therefore, the swing lever 42
As the cushion seat swings, the swing lever 52 also swings, and the rear part of the cushion seat moves up and down.

A swing link 46 is rotatably supported on the inner surface of the support plate 16 near the front lift mechanism 20 via a rotation shaft 45 . This swing link 46 and the swing lever 42
are interlocked with each other by a connecting bar 48. That is, when the swing link 46 swings, the other swing levers 42 also swing via the connecting bar 48. A swing link 56 corresponding to the swing link 46 is also provided on the inner surface of the support plate 16 on the other side.
is attached and is also interlocked via the swing lever 52 and the connecting bar 58. Swing link 46.56, support shaft 4
They are connected by a connecting bar 49 extending from 5.

At the tip of the swing link 46, there is a fan-shaped sector gear (external teeth).
46a is formed, and this external tooth 46a is provided with an intermediate small gear 5.
0a is engaged. This intermediate small gear 50a is fitted onto a rotating shaft 50, and the rotating shaft 50 is attached to a brake device 80 attached to the support plate 16. An intermediate large gear 50b is fixed to the rotating shaft 50 that projects outward from the brake device 80.

The common adjustment operating device 60 has a drive mechanism that drives the front lift mechanism 20 and the rear lift mechanism 40, and a switching mechanism that selectively transmits the drive force to one of the lift mechanisms 20 or 40. . This will be explained below with reference to FIGS. 3 and 4.

Swing arms 62 and 63 formed at predetermined intervals in the axial direction are rotatably supported on the outer part of the rotation shaft 45 that extends outward through the support plate 16. A drive gear 64 is supported between the swing arms 62 and 63 so as to be rotatable and movable in the axial direction. The drive gear 64 is pivotally supported by a drive shaft 66 passing through the swing arm 62, 63, and an operating knob 68 is fixed to the outer end of the drive shaft 66.

The drive shaft 66 is constantly urged to move inward by a leaf spring 69.

A guide plate 70 is provided between the drive gear 64 and the operating knob 68 for regulating the swing range of the swing arm 62, 63, that is, the movement range of the drive gear 64. It passes through a guide groove bored in 70. The guide groove has shaft holes 71a and 71b at both ends that rotatably support the operating knob 68.
A slightly narrow guide portion 71c is provided between the shaft holes 71a and 71b. drive shaft 66
The shaft holes 71a and 7ib fit into the guide portion 71c.
A thin shaft portion 66a that can be moved between the two is formed.

The support plate 16 has a shaft hole 16a into which the tip of the drive shaft 66 fitted into the shaft holes 71a and 71b can be fitted.
, 16b are perforated. When the drive shaft 66 is in the shaft hole 71a, the drive gear 64 meshes with one intermediate large gear 26b, and when it is in the shaft hole 71b, it meshes with the other intermediate large gear 50b.

In addition, in this embodiment, a brake device 8 is attached to the rotating shaft 26.50 to prevent the seat cushion from descending even if a load is applied in the downward direction, such as when a person sits on the seat cushion.
0 is included. Since the braking devices 80 of the pivot shafts 26, 50 are both basically of the same construction, the braking devices 80 of the pivot shafts 26 will be described with reference to FIG.

This brake device 80 is a well-known device used, for example, in a window regulator, etc., and a core portion 82 is provided in a negative body on the rotating shaft 26 to which a large intermediate gear 26a is fixed. Furthermore, the intermediate small gear 26 enters into the space of the core portion 82 and cooperates with the stopper spring 86.
A nion plate 84, which has a tongue side that generates a brake against rotational force from the side a, is fitted onto the intermediate small gear 26a. Reference numeral 88 denotes a binion case, the inner peripheral side surface of which serves as a friction surface with the stopper spring 86.

When the rotation shaft 26 is rotated by the operating knob 68, the core portion 82 contacts the hook portion of the stopper spring 86 to reduce the diameter of the stopper spring 86, and then the rotational force is transmitted to the stopper plate 84. Furthermore, the intermediate small gear 26a to which the binion plate 84 is fitted
, and the intermediate small gear 26a rotates.

On the contrary, for the rotational force from the intermediate small gear 26a side,
and the tongue piece of the nion plate 84 is the stopper spring 86.
The stopper spring 86 is expanded in diameter by contacting the hook portion of the stopper spring 86 . As a result, the frictional force between the stopper spring 86 and the binion case 88 increases, and the rotation of the intermediate small gear 26a is prevented.

Next, the operation and operation of the seat adjustment device configured as described above will be explained.

In the state shown in FIG. 2, the drive shaft 66 is fitted into the shaft hole 71a, and the drive gear 64 is connected to the intermediate large gear 26b.
It meshes with the When the operation knob 68 is rotated counterclockwise in this state, the drive shaft 66 and the drive gear 6
4. Intermediate large gear 26b, intermediate small gear 26a and internal teeth 2
The swing lever 22 rotates clockwise via the lever 2a. Then, the connecting link 24 pivotally supported by the swing lever 22
rises, and the front part of the cushion seat rises. Also,
When the operating knob 68 is rotated clockwise in the opposite direction, the swing lever 22 is rotated counterclockwise and the cushion seat is lowered.

To raise or lower the rear part of the cushion seat, pull the operating knob 68 outward as far as it will go. Then, drive gear 6
4. The drive shaft 66 moves outward against the biasing force of the leaf spring 69, and the tip of the drive gear 64 is inserted into the shaft hole 16a.
Remove the drive shaft 66 and intermediate large gear 26.
b is disengaged, and the thin shaft portion 66 of the drive shaft 66
a moves to a position where it fits into the guide groove 71c.

When the operating knob 68 is moved from this position along the guide groove 71c to the shaft hole portion 71b, the thin shaft portion 66a is removed from the guide groove 71c.

Here, the operating knob 68 is returned along the biasing force of the leaf spring 69. Then, since the thin shaft portion 66a comes off from the shaft hole portion 71b, the drive shaft 66 no longer returns toward the shaft hole portion 71a. The drive gear 64 meshes with the intermediate large gear 49b, and the tip of the drive shaft 66 fits into the shaft hole 16b. As a result, the drive shaft 66
Since both ends are supported by the shaft hole 16a and the shaft hole portion 71b, by rotating the operating knob 68, the intermediate large gear 50b can be rotated.

Therefore, when the operation knob 68 is rotated clockwise, the intermediate gears 50b and 50a are rotated counterclockwise via the drive shaft 66 and the drive gear 64, and the swing link 46
rotates clockwise. Therefore, the connecting bar 48 moves forward, the swing lever 42 rotates counterclockwise, and the rear part of the seat cushion lowers. Conversely, the operating knob 68
When the lever 42 is rotated counterclockwise, the rotation direction and movement direction of each of the above members are reversed, that is, the swing lever 42 is rotated clockwise and the rear portion of the seat cushion is raised.

According to this embodiment, the inclination and height of the seat cushion can be adjusted by appropriately selecting the above operations.

Further, in this embodiment, the brake device 80 is used as a device for preventing the cushion seat from falling, but instead of the brake device 80, an intermediate small gear 26a is used.

You may use a worm gear for 50a, the internal teeth 22a, and the external teeth 46a. Further, the drive gear 64 is configured to be able to be held in three positions, and in the third position, the intermediate gear 26
A gear train may be configured so that the cushion seats 50b and 50b can be rotated at the same time, so that the cushion seat can be moved up and down at the same time.

In addition, in this embodiment, an example in which the present invention is applied to the front and rear height adjustment mechanisms of a cushion seat has been described.
It can also be applied to other detailed mechanisms, such as seat back lumbar support and side support adjustment mechanisms.

"Effects of the Invention" As is clear from the above explanation, the seat adjustment device of the present invention can perform two or more seat adjustments such as seat tension height and inclination adjustment with one common adjustment operation device. The number of operating parts is reduced, and even if the operating parts are provided on the narrow side of the lower part of the seat, operability will not be impaired.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the main parts of an embodiment of an automobile seat to which the seat adjustment device of the present invention is applied, Fig. 2 is a side view of the embodiment, and Fig. 3 is a side view of the embodiment. FIG. 4 is an exploded perspective view of the operating portion, FIG. 4 is a plan view thereof, and FIG. 5 is a sectional view of the brake device. 10--Seat track, 14--Upper rail, 16
- Support plate, 20 - Front lift mechanism, 21 - Support shaft, 22 - Swing lever, 22 a - Internal teeth, z3 - Support shaft, 24 series of connecting links, 26 - Rotation shaft, 32 -・Swinging lever, 34・Series connection link, 40・-rear lift mechanism,
41 - Support shaft, 42 - Swing lever, 46 - Swing link, 46a - External teeth, 48 - Series connection bar, 52 - Swing lever, 60 - Common adjustment operating device, 62 - Swing arm , 64-drive gear, 66--drive shaft, 6
8.-Operation knob, 70-.Guide plate Patent applicant: Shiraki Metal Industry Co., Ltd., Agent: Kunio Miura, Yoshimi Sasayama Figure 5 Procedural Amendment (Flag) 1. Display of incident Patent application No. 332898 of 1988 2) Name of invention Seat adjustment device Representative Masaru Fujimaki Aku

Claims (4)

[Claims] (1) Cushion of a vehicle seat Equipped with two or more seat adjustment mechanisms such as the front height, rear height, overall height, and seatback inclination angle of the seat, and the adjustment operation part of these seat adjustment mechanisms is the cushion. 1. A seat adjustment device located on a side surface of a seat, characterized in that a common adjustment operation device is provided on a side surface of a cushion seat and can be selectively engaged with two or more seat adjustment mechanisms. (2) In claim 1, the seat adjustment mechanisms operated by the common adjustment operating device include a front lift mechanism that adjusts the front height of the cushion seat and a rear lift mechanism that adjusts the rear height. Seat adjustment device. (3) In claim 2, the cushion seat is fixed on the upper rail of a seat track consisting of a pair of parallel lower rails fixed to the floor and an upper rail slidably attached to the lower rails. The front lift mechanism and the rear lift mechanism are each comprised of a swing lever that is swingably supported by one of the upper rails and supports the front and rear portions of the cushion seat via links, respectively, and the common adjustment operating device includes: A swing arm pivotally supported near the front lift mechanism, an operation knob rotatably and axially movably supported on the swing arm, and a drive gear fixed to the shaft. , a swing link having intermediate gears that mesh with the drive gears at both swing ends of the swing arm, and a sector gear that is swingably supported in the vicinity of the rear lift mechanism and meshes with one of the intermediate gears; The swing link and the swing lever of the rear lift mechanism are interlocked via a connecting link, and the sector gear formed on the swing lever of the front lift mechanism is meshed with the other intermediate gear. seat adjustment device. (4) In claim 3, when a force in the downward direction is applied to the swing lever or one shaft of the intermediate gear of both lift devices, the movement of the lift device in the downward direction is prevented. Adjustment device for the seats, each of which is equipped with a braking device.