JPS607483B2 - vehicle seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle seat installed in an automobile, etc., and particularly when installed in a narrow space such as the cab of a small truck, the position can be adjusted in the front and back direction, and the seat back can also be adjusted. It can be moved forward and backward.

Conventionally, when installing a seat in a limited space such as the cab of a small truck, the seat is either fixed in place due to the limited space, or the seat back is placed only in the front in order to make effective use of the rear space. In addition, when installing a so-called reclining seat in which the seat back can be tilted forward and backward in such a limited space, it is necessary to adjust the position of the seat cushion in the forward and backward direction, especially It is necessary to prevent the vehicle from sliding backwards, making it impossible for the occupant to take a seating position according to his or her preference.In particular, the driver may become fatigued by continuing to sit in an unreasonable position, which may impede safe driving. There are some inconveniences.

Therefore, in order to eliminate the drawbacks of the conventional seats, the present invention provides a seat whose seat back can be moved forward and backward so that the position of the seat cushion can be adjusted in the forward and backward direction even in a limited space. .

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 indicates the seat as a whole, and seat back 2
The seat cushion 3 is a so-called reclining seat in which the seat back 2 rests on the seat cushion 3 in the longitudinal direction, and the seat cushion 3 is installed on the floor A of the vehicle body so that its longitudinal position can be adjusted. That is, a reclining device 5, which is a hinge part of a back frame 4 of the seat back 2, is installed between the seat back 2 and the seat cushion 3, and slide rails 6 for adjusting the longitudinal position are arranged on both sides of the lower surface of the seat cushion 3. It is set up.

Since the reclining device 5 and the slide rail 6 have a well-known configuration, a detailed explanation thereof will be omitted. The lower rail 6b is fixed to the floor A of the vehicle and is slidably engaged in the front and rear direction via a ball bearing 8, and the front end has an operating lever 9 for the position adjustment device.
is installed protrudingly. The present invention provides a locking device 1 for preventing rearward movement of the seat cushion 3 when the seatback 2 is in a rearward resting state in a seat configured as described above.
8.

This locking device 1Q' includes a pin 1 protruding from an extension end 4a extending from a pivoting portion of the back frame 4 to the reclining device 5, and a pin 12 and a guide protruding from the rear side of the cushion frame 7. A locking piece 14 is supported slidably in the vertical direction by a single turtle 3, and the tip of the locking piece 14 is supported by a pin 11 of the back frame 4, and a locking piece 14 is provided near the rear of the slide rail 6 in a gradual manner. It is composed of a step-like engaging body 15 whose lower end portion faces each other depending on the descending stage when descending.That is, when this locking device 1 is moved, a step-like engagement piece 14 is formed.
Pin 1 is attached to the upper rear edge according to the movement angle of back frame 4.
1 is engaged with a plurality of engagement steps 24a? 24b, 24
c are successively stepped from the top, and a long hole 24d in the vertical direction is provided in the center to be engaged with the pin 12, and a projection 24e is integrally protruded from the lower end, and this Piece 1
A return spring 16 is stretched between 4 and the cushion frame end, and the return spring 16 is constantly slid upward, and at the uppermost sliding position, the upper end surface is stopped by a stopper 17 protruding from the upper twill part of the cushion frame end. Ru.

Further, the engaging body 15 has a plurality of step surfaces 25a, 25b, and 25c formed to be higher in sequence toward the rear, and the height of each step surface is determined by the height of the protrusion 24e of the locking piece 14 as the locking piece 14 gradually lowers. The length of each stepped surface is set so that they are opposite to each other, and the length of each stepped surface is
The cushion frame 7 is configured to be able to move rearward within a required range depending on the lowering state of the cushion frame 7.

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

When the seat back 2 of the seat 1 is in the normal position (solid line in Figure 1), the locking piece 1 is the return spring 16.
The seat cushion 3 is slid upward and is locked by the stopper 17, and the lower end protrusion 24e is positioned above the engaging body 15 (double-dashed line in Fig. 4), and the seat cushion 3 is moved rearward from the slide rail S'. It is in a movable state and can be adjusted to move rearward by operating the operating lever 9. When the seat back 2 is moved rearward in this state (as shown by the dashed dotted line a in Fig. 1), the back frame 4 moves along with this movement. The pin 11 is the locking piece 1
As a result, the locking piece 4 is pushed down and the lower end protrusion 24e faces the highest step surface 25c of the engaging body amount 5. (Fig. 4C), the seat cushion 3 is attached to the protruding piece 24 of the locking piece 14.
The rearward movement can be adjusted within the range where e touches the stepped surface 25c of the engaging body 15.

Further, when the seat back 2 is moved to the position shown in the dashed line b in FIG.
4b, the locking piece turtle 4 is pushed down, and its lower end projecting piece 24e is brought into contact with the intermediate stepped surface 26M of the engaging body 15 (
Fig. 4B), the seat cushion 3 has a protruding piece 246 on the stepped surface 2.
5b, rearward movement adjustment is possible within a range that is smaller than the above-mentioned movement range.

When the seat back 2 is further pivoted to the position shown by the dashed line c in FIG.
The locking piece 14 is pushed down to the lowest layer, and the lower end protrusion 24e faces the lowest step surface 25a of the engaging body 15, but the protrusion 24e is located just before the step surface 25a. (Fig. 4A) "The seat cushion 3 can hardly be moved rearward and is locked in the rearward direction.

When the seat cushion 3 is moved rearward in each of the above-mentioned steps, and the locking piece 14 is latched to the engagement body 15, even if the seat back 2 is moved rearward, the lower end of the locking piece 14 comes into contact with the upper surface of each stepped portion of the engaging body 16, making it impossible to push down the locking piece 14, so that the pin turtle 1 of the back frame 4 is locked to the locking piece 14. Rearward rotation of the back frame 4, ie, rearward movement of the seat back 2, is prevented.

As described above, in this example, when the seat back 2 is in its normal state, the seat cushion 3 can move backward within the maximum range. When the seat cushion 3 cannot be moved backwards, the seat back 2 will not hit the back panel B of the vehicle body.

In addition, if the seat back 2 is moved forward in the locked state at each stage (as shown by one-dot chain lines d and e in Figure 1), the pin 11 will be separated from the locking piece 14, and the pin 11 will be released from the locking position. Piece 1
4 is pulled up by the return spring 16 and disengaged from the engagement body 15, and the seat cushion 3 becomes movable. In this example, the locking stage of the locking diamond layer 8 is set to three stages, but the number of stages can be increased or decreased within the maximum range of the seat back 2, and the shape of each member is as shown in the figure. Of course, the locking device wings Q' may be of any shape as long as they can perform the above operations, and the locking device wings Q' can also be installed on both sides of the seat if necessary.

As described above, according to the present invention, in a vehicle seat in which the front and rear positions of the seat cushion can be adjusted and the seat back can be moved in the front and rear direction, the seat cushion can be moved rearward by adjusting the rearward movement angle of the seat back. Since the structure is configured to restrict the amount of movement of the seat cushion, even when installed in a small space such as a small truck, the seat cushion can be moved rearward and the frame of the seat back can be moved in multiple stages according to the physique and preference of the occupant. The present invention has the following advantages: it is possible to adjust the movement of the seat to take a comfortable sitting position, it is possible to effectively utilize a narrow space, and the structure is extremely simple and can be easily applied to various types of vehicle seats.

[Brief explanation of the drawing]

Fig. 1 is a partially cut side view of an example of a vehicle seat according to the present invention; Fig. 2 is a perspective view of the main parts; Fig. 3 is a rear view of the main parts; and Fig. 4 is an explanatory diagram of the operation of the diamond part. In the figure, 1 is the seat, 2 is the seat back, 3 is the seat cushion, 4 is the back frame, 5 is the reclining device, and 6 is the slide rail. 15 is an engaging body; 24a to 23c are locking step portions; and 25a to 25c are engaging step surfaces.

Claims (1)

[Claims] 1. In a vehicle seat in which the longitudinal position of the seat cushion can be adjusted and the seat back tilted in the longitudinal direction, the seat cushion is pushed down in stages in connection with the rearward tilting operation of the seat back. A locking member is disposed on the floor side, and when the seat cushion moves backward, the locking member is engaged rearward in stages according to the amount of descent thereof, and the descent is suppressed. What is claimed is: 1. A vehicle seat comprising an engaging member, the seat being configured to restrict the amount of rearward movement of the seat cushion by the rearward tilting angle of the seat back.