JPS6042051B2 - Seat adjustment device for vehicle seats - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat adjustment device for a vehicle seat that adjusts the angle of an independent front edge separate from the seat main body.

It is actually necessary that the seat angle of a vehicle seat differs depending on individual differences, and when the seat is slid forward, the knees rise and a gap is created between the seat and the front edge of the seat, so that the user can take a comfortable posture. It is preferable to adjust the speed of the vehicle, thereby making it possible to travel comfortably and resulting in less fatigue even when traveling over long distances.

Conventionally, seat up/down mechanisms for vehicle seats have been put to practical use and are somewhat functional, but those with a structure that moves the entire seat up and down have a high seat surface, making it difficult to get on and off the vehicle. There was a problem.

The present invention is proposed with the aim of eliminating these drawbacks of the conventional examples, and the angle of the independent front edge is adjusted by vertically swinging an independent front edge that is separate from the seat body of the seat. An object of the present invention is to provide a seat adjustment device for a vehicle seat that can be adjusted to the body shape and preferred posture of each person by changing how the thighs of the seat occupant are held. That is, in the present invention, the independent front edge portion of a vehicle seat cushion is fixed, both ends are pivotally connected to the cushion frame, and the independent front edge portion is fixed by an adjustment lever attached to an end portion outside the pivoting portion. a main shaft that swings up and down; a cylindrical sub-shaft through which the main shaft is coaxially rotatably inserted and a lock lever attached; a bracket fixed to the main shaft; and a sub-shaft fixed to the main shaft. A guide member formed of a guide plate, and a pin that is slidably supported between the bracket of the guide member and the guide plate and is positioned so that it can be moved in the axial direction of the main shaft by the same sliding movement. a lock gear that is erected and has teeth on its edges, and a plate that has one end fixed to the sub-shaft and has an elongated hole that is provided obliquely to the rocking direction of the lock gear and into which the pin fits. and a meshing engagement member which is fixed to the cushion frame and is movable in the direction of swinging the independent front edge portion upward with respect to the teeth of the lock gear, and is engaged in the direction of swinging the independent front edge portion downward. The plate is rotated by operating the lock lever, and the elongated hole moves the pin in the axial direction of the main shaft, whereby the lock gear and the sector gear are There is provided a seat adjustment device for a vehicle seat, characterized in that the device is configured to disengage the mesh. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a perspective view of the seat of a vehicle seat, Fig. 2 is an exploded perspective view showing the general configuration of the device of the present invention, Fig. 3 is an exploded view of the constituent parts, and Fig. 4 shows the operation of the locking mechanism. It is a front view.

In Fig. 1, reference numeral 1 denotes the seat portion of the seat, and an independent front edge portion 2 made separately from this portion swings in the direction of the arrow around the rear portion thereof to adjust the appropriate seat angle. .

2, 3, and 4, the outer ends of the adjustment lever 3 and the main shaft 4 are fixed with machine screws 5 (or directly welded), and the outer ends of the adjustment lever 3 and the main shaft 4 are fixed with a bracket 6.
, the bracket 6 and the guide plate 7 are fixed.

The bracket 6 and the guide plate 7 form a guide member for the lock gear 8. That is, between the bracket 6 and the guide plate 7, there is a toothed part at the lower end that engages with the sector gear 9, and a lower part which passes through a notch 24 of the guide plate 7 and engages with a long hole 19 of the plate 18, which will be described later, and rises when the lock is released. A lock gear 8 to which a pin 21 to be inserted into a long hole 22 of the bracket 6 is fixed is slidably disposed on the upper part thereof, and between the tip of the pin 21 and the lower part of the bracket 6 is a lock gear 8, which will be described later. A spring 23 is biased so that the lock gear 8 always meshes with the sector gear 9 at any position. The guide member consisting of the guide plate 7 and the bracket 6 supports the lock gear 8 in the front, rear, right and left directions, prevents rattling, and smoothes the vertical displacement of the lock gear 8. Further, a spring 1 is provided between the bracket 6 and the cushion frame 11 in the pulling direction.
4 are provided. The tooth profiles of the sector gear 9 and the lock gear 8 are formed in the shape of a pawl clutch that is free in one direction and meshes in the other direction. Holding bracket 1
0, the sector gear 9 is fixed to the inside of the lower end and welded to the cushion frame 11.

A lock lever 15 is attached to one end of the sub-shaft 16 with a machine screw 5 (direct welding is also possible), and a lock lever 15 is attached to the other end with a shaft having different distances between shafts that engage with the pin 20 to move the lock gear 8 upward. A plate 18 provided with elongated holes 19 is fixed.

This sub-shaft 16 is rotatably inserted into a hole 25 provided in the upper part of the holding bracket 10.
The main shaft 4 is rotatably inserted through the shaft 6. Now, in order to raise the independent front edge 2, when the adjustment lever 3 is raised, the main shaft 4 and the bracket 6 are rotated.

At this time, the lock gear 8 slides along the slope of the teeth of the sector gear 9 in the direction of the arrow in FIG. Contrary to the above, when lowering the independent front edge portion 2, the sector gear 9 and the lock gear 8 are engaged with each other using a pawl clutch type, etc., in the opposite direction of the solid line arrow in Fig. 3. When the lock lever 15 is lowered as shown in FIG. 4, the subshaft 16 and plate 18 rotate, and the pin 20 of the lock gear 8 inserted into the elongated hole 19 of the plate 18 rotates. is pulled up, and the engagement between the sector gear 9 and the lock gear 8 is released. At this time, when the adjustment lever 3 is lowered and the independent front edge 2 is at the appropriate position, when the lock lever 15 is released, the bracket 6 The lock gear 8 meshes with the downward sector gear 9 by means of a return spring 23 attached thereto, and the independent front edge 2 is held.

According to the seat adjustment device of the present invention, since the front edge independent of the seat body is operated in the vertical direction, the operating range is wide, and the rear part of the seat remains unchanged, so there is no problem when the passenger gets on and off the seat. Since the structure is simple and there is no trouble, it can be supplied at low cost.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the seat of a vehicle seat, Fig. 2 is a perspective view showing the configuration of the device of the present invention, Fig. 3 is an exploded perspective view of the main parts, and Fig. 4 is a front view showing the operation of the locking mechanism. It is. 1. Seat, 2. Independent front edge, 3. Adjustment lever, 4
・・Main shaft, 5, 13, 17・・Machine screw, 6・
・Bracket, 7...Guide plate, 8...Lock gear, 9...Sector gear, 10...Holding bracket, 1
1...Cushion frame, 12...Arm, 14...
Spring, 15... Lock lever, 16. Sub shaft, 18... Plate, 19, 22... Long hole, 20, 2
1. Pin, 23. Return spring.

Claims (1)

[Claims] 1. An independent front edge of a vehicle seat cushion is fixed, and both ends are pivotally connected to a cushion frame, and the independent front edge can be swung up and down by an adjustment lever attached to an end outside the pivoting portion. A main shaft to be moved, a cylindrical sub-shaft through which the main shaft is rotatably inserted coaxially and a lock lever is attached, a bracket fixed to the main shaft, and a guide plate fixed to the bracket. A pin is erected at a position that is slidably supported between the guide member and the bracket and guide plate of the guide member and can be moved in the axial direction of the main shaft by sliding. a lock gear having teeth on its edge; a plate having one end fixed to the sub-shaft and having an elongated hole provided obliquely to the sliding direction of the lock gear and into which the pin fits; and the cushion. a sector gear which is fixed to the frame and is movable in the direction of upward swinging of the independent front edge against the teeth of the lock gear, and engages and locks the independent front edge in the direction of downward swinging; The plate is rotated by operating the lock lever, and the elongated hole moves the pin in the axial direction of the main shaft, thereby disengaging the lock gear from the sector gear. A seat adjustment device for a vehicle seat, characterized in that: