JPS60148725A - Seat - Google Patents

Abstract

PURPOSE:To enable simultaneous adjustment of seat height and a seat angle, by a method wherein, in a seat having a seat lifter, a front and a rear link, by which a seat is supportable vertically to a car body, and gears supported to the seat, and a control device for regulating the rotation position of the gears are provided. CONSTITUTION:When a center gear 19 is turned in a clockwise direction A through the medium of a support axle 21, a sector gear 15 is rotated in a counterclockwise direction B, and as a result, a front link 9 is rotated in a counterclockwise directing G centering around a pivotally-securing port P on the car body side. This causes a rear link 41 to conduct the same action as that of the front link 9 through the working of the sector gear 15, a coupling link pin 43, and a coupling link 45 centering around the pivotally-securing point P on the car body side. In which case, a distance between the pivotally-securing point P-Q of the rear link 41 is longer than a distance between the pivotally-securing point P-Q, and as a result, the rotating distance of the rear link 41 is increased over that of the front link 9. Thus, a longitudinal relative movement between a slide rail 1 and a seat frame 11 is varied in proportion to a lift amount to regulate a seat angle.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application This invention relates to a seat equipped with a seat lifter for vertically adjusting the seat.

b. Prior art As a conventional seat with a seat lifter, for example, Jikkosho! ♂-21L? There is one as shown in Publication No. 22.

However, with such conventional seat lifters, the seat height and seat angle are adjusted independently, so while any position can be selected, the operation is complicated and the mechanism is complicated, resulting in high costs. There is a problem in that this not only causes the problem, but also becomes a factor in increasing the weight.

C6 Purpose of the Invention The present invention has been made in view of the problems of the prior art, and aims to provide a lid mechanism that allows the seat height and seat angle to be adjusted simultaneously through one action.

d0 Structure of the Invention In order to achieve the above object, the present invention includes at least a front and rear link that supports the seat vertically with respect to the vehicle body, with one end pivotally supported on the vehicle body side and the other end pivotally supported on the seat side. a sector gear supported on the seat side of one of the links and not rotatable with respect to the link; a center gear rotatably supported by the seat and meshing with the sector gear; and an operating device for adjusting the rotational position of the center gear. has
The seat is characterized in that either one of the front and rear links is made shorter than the other link, and the amount of movement of one link side is smaller than that of the other link side, so that both the sitting height and the sitting angle can be changed at the same time.

e. Examples This invention will be explained below based on the drawings. FIG. 1 and FIG. 2 are diagrams showing one embodiment of the present invention.

First, to explain the structure, slide rails in the front and rear directions of the east body are arranged in parallel in the middle direction of the car body. Both slide rails/
On the front side (marked by arrow F in Figure 1), the front lower bracket 3 is a fixing device such as a bolt or nut! are installed respectively.

The front lower bracket 3 has a support portion 3a.
Link to a! One end of 0 is a support pin! One end of the front link 9 is pivotally supported to the other end jOa via a link support pin 2. In other words, it is pivotally supported on the vehicle body side.

As shown in Fig. 1, the front lifter is arranged along the slide rail so as to face diagonally downward to the rear.

The other end of the front link lid is pivotally supported on a support pin /3 protruding inward from the seat frame 11, in other words, it is pivotally supported on the seat side. The support pin 13 is arranged near the lower edge of the seat frame ii, and in this state the seat frame // is in the lowering position.

The support pin /3 of the seat 7 frame l/ additionally has a sector gear /! ; is centrally supported. Is sector gear/jt a front link? In other words, the seat frame l
It is placed on the l side. Sector gear /3 is support pin 1
It has a fan-like shape centered on the axis of 3, and the sector gear /3
is fixed integrally with the front link lid.

A sector gear /9 is meshed with the sector gear /j below the link support pink. center gear 19
is a support shaft 2 rotatably supported by the seat frame //
/ is fixed to /. The support shaft 2/ has one end extending to the outside of the seat frame/l, and is pivotally supported by a support plate 25 attached to the outer wall of the seat frame// by a fastener such as a bolt or nut.

The other end of the support shaft 2/ extends inside the seat frame l/, and a connecting pipe 27 is provided at the ends of the left and right support shafts 2/.
are connected, and the left and right support shafts 2/ are rotated integrally by this connecting vibrator 27. Connected vibrator 27
On the outer circumference of the balance spring 2? One end of this balance spring kota is locked to a knock pin 3 protruding from the connecting vibrator 27, and the other end is locked to a retainer 33 welded to the seat frame 11. ing.

Of the left and right support shafts 2/, the support shaft 21 on the driver's right hand side (the left support shaft in FIG. 1) is further extended to the outside of the support plate 23. An operating lever 37 is attached to the outer end of the thus extended support shaft 21 via an operating device, such as a braking device 33tg, for adjusting the rotational position of the center gaff 190. On the other hand, the rear side (first
The rear lower bracket 3 is fixed to the R arrow mark in the figure in the same way as the front lower bracket 3! It is installed by Rear lower bracket 3? is front lower bracket 3
Although it is formed almost the same as , it is a link! θ is omitted, and it is attached to the front lower bracket 3 in the opposite direction. Support part of rear bracket 3? In a, there is a rear link 4t via a link support pin 7 on the outer side in the direction of the vehicle body.
The rear link 4t/, on which one end of the / is pivotally supported, is disposed diagonally rearward and downward along the slide rail /, as shown in Figure 1. The other end of the rear link μ/ is pivotally supported by a support pin 13 that protrudes inward from the seat frame // like the front link μ. The straight line connecting the vehicle body side pivot point P of the rear link 4t/ and the seat frame side pivot point Q is:
The front link 90 is not parallel to the straight line connecting the single body side pivot point P and the seat frame side pivot point Q, and the length between Q and -Q is longer than the length between pp. Also, the P-Q opening of the rear link 4t/ is longer than the P-Q length of the front link lid.0 The middle S of the rear link μ/ is:
It projects upward and is provided with a connection Iag/a. A connecting pin (tj) is provided on the connecting portion 4t/a and the sector gear 15 above the electric body pivot point P, and
Both ends of a substantially horizontal connection link 4tj in the longitudinal direction of the vehicle body are pivotally supported by both connection pins 4t3.

Although not shown, a cushion is attached to the seat frame 11 to constitute the seat.

Next, the effect will be explained.

First, the control device 35 is unlocked by grasping the operation lever 37, pulling it out, and rotating it. At the same time, one center gear/9 rotates via the support shaft 21, and at the same time, the other center gear/9 rotates via the connecting vibrator 27, the support shaft, and The center gear rotates. At this time, the balance spring 29 springs between the knock bottle 3/ and the retainer 33, thereby biasing the support shaft 2/ in the rotational direction of the center gear iq.
Operation of the control lever 77 has become easier.

The rotation of sector gear 19 is! , in the clockwise direction as indicated by arrow A in Figure 2. Due to this rotation of sector gear /9, sector gear i3 attempts to rotate in the counterclockwise direction (arrow B), which is the direction opposite to A in FIG. Since the sector gear /3 is pivotally supported on the front lid by the support pin 13, the sector gear /j rotates around the support pin 13, and rotates upward at the pivot point Q of the front link 9 on the seat frame side. A rotational moment is generated.

The front link lid rotates counterclockwise with arrow G around the vehicle body side pivot point P by resisting the weight of the driver, etc., which acts downward on the seat frame 11111 pivot point Q by the rotational moment of the seat frame 11111 pivot point c. Rotate to.

By rotating the front link 90 times, both rear links 4t/ perform the same operation as the front link lid around the pivot point P on the vehicle body side via the sector gear /3, the connecting link pin 4t3, and the connecting link 'II connecting link pin 4t3.

At this time, the length between the pivot points P and Q of the rear link 4t/ is greater than the length between the pivot points P and Q of the front link 2, so the rotation of the rear link 4t/ is greater than the rotation distance of the front link lid. The distance increases, and the row rises (and the relative movement of the slide rail / and the seat frame / / changes in proportion to the amount of lift, and the rear lift sensitivity lifts more than the front lift acid. Become.

1, the seat is constructed with a cushion attached to the seat frame 11, so the front end of the seat lowers and lifts freely, changing the seating angle. When the release of the braking device 3S is stopped, the center gear /9 is locked via the support shaft 21, and the sector gear /,! ;, support pin 1
3. The seat is held in the lifted position via the seat frame.

Since the length between P and Q of the front and rear rails is changed, the parallelogram shape is not formed, but it is lifted (the front and rear pivot points CPI Q). Since the link jθ is provided to prevent the movement of the two parts, the movement is performed smoothly.

In addition, in this actual gun example, the front movement line is made smaller than the rear movement amount, but it is easy to change the number of front and rear movements, that is, to replace the links.

f. Effects As explained above, according to the present invention, the length of the pivot point P-Q of the front link and the pivot point P-Q of the rear link are
Q4% Since the movement of each pivot point is not hindered, the seat angle can be automatically adjusted in proportion to the lift.

[Brief explanation of drawings]

FIG. 7 is an overall perspective view of one embodiment of the present invention, and FIG. 1 is an explanatory view of the operation according to the n-[1j gland cross section of FIG. 1. /...Slide rail, 3...Front lower bracket, 9.4t/...Front, rear tltlS link, //...
・Seat frame, 13... Sector gear, /9...
Center gear 1,...braking device as operating device, 37.
...Operation lever, 39...Rear lower bracket, 4t
6...Connection link.・、−・−２・− Representative Patent Attorney Ishito (7c,!

Claims (1)

[Claims] a front and rear link that supports the seat vertically with respect to the vehicle body, with one end pivotally supported on the vehicle body side and the other end pivotally supported on the seat side; and the link supported on the seat side of at least one of the links; A sector gear that cannot rotate with respect to the front and rear links, a center gear that is rotatably supported by the seat and meshes with the sector gear, and an operating device that adjusts the rotational position of the center gear. A seat characterized in that the sitting height and sitting angle can be changed at the same time by making the links shorter than the other links so that the amount of movement on one link side is smaller than on the other link side.