JPS5911796Y2 - Posture adjustable power seat - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a posture-adjustable power seat suitable for use as a rear seat of an automobile.

In recent years, in order to improve the riding comfort of passengers seated in the rear seats of automobiles, the posture of the rear seats has been made adjustable.In addition, power seats have been developed in which the above-mentioned posture adjustment is performed via a drive mechanism. is actively being developed.

However, in this type of conventional posture-adjustable power seat, the drive mechanism is located below the seat cushion, so the thickness of the seat cushion inevitably becomes thinner, resulting in poor ride comfort. be.

In addition, in conventional posture-adjustable power seats, the rails that guide the seat cushion back and forth are arranged in a straight line as a whole, and the rails are arranged so that they gently ascend and slope forward. There is a problem in that when the seat cushion is slightly moved forward, it is not possible to obtain a sufficient amount of tilt (inclination rise amount) at the front of the seat cushion, and as a result, the ride comfort for the occupant cannot be improved.
Moreover, at this time, the hip point at the rear of the seat cushion also rises, resulting in a problem in that the seating height of the occupant increases and head clearance decreases.

This invention attempts to solve these problems.
To provide a posture-adjustable power seat with good riding comfort by efficiently arranging a drive mechanism and a seat cushion guide rail in a limited interior space of a vehicle.

Therefore, the posture adjustable power seat of the present invention includes a cushion frame whose middle portion is pivotally connected to the vehicle body, and a back frame whose rear end is pivotally connected to the lower end of the cushion frame. The guide rail is a front rail part that is raised and tilted forward to guide the front part of the cushion frame back and forth, and a front rail part that is arranged almost horizontally to guide the rear part of the cushion frame back and forth. The present invention is characterized in that a drive mechanism capable of driving the back frame is installed in a space behind the back frame.

The posture adjustable power seat as an embodiment of the present invention will be explained below with reference to the drawings. Fig. 1 is a side view thereof, Fig. 2 is a perspective view for explaining its structure, and Fig. 3 is a side view thereof. A sectional view taken along arrows III-III in the figure, and FIG. is provided in the elongated hole 2a of the connecting member 2,
A retaining protrusion 4a at the lower end of the back frame 4 whose intermediate portion is pivotally attached to the bracket 3 with the vehicle body B is fitted.

That is, the rear end of the cushion frame 1 and the lower end of the back frame 4 are in a pivotal relationship with each other.

Further, the seat cushion 5 is constructed by covering the cushion frame 1 with a seat cover via a cushioning material or the like, and the seat back 6 is constructed by similarly covering the back frame 4 with a seat cover via a cushioning material or the like. These seat cushions 5 and seat backs 6 form a rear seat RS whose posture can be adjusted in the vehicle interior.

By the way, as shown in FIGS. 1 to 3, two legs 8 having rollers 7, 7 are provided on the side of the cushion frame 1 at the front and rear.

A rail 9 is provided to guide the cushion frame 1 via these rollers 7, 7 and leg portions 8.

This rail 9 includes a front rail portion 9a that is disposed upwardly and inclines forward, and a rear rail portion 9 that is disposed approximately horizontally.
The rollers 7, 7 provided on the front of the two legs 8 fit into the front rail portion 9a, and the rear rail portion 9b for,
The rollers 7, 7 provided on the rear of the two legs 8 are fitted.

Therefore, the front and rear portions of the cushion frame 1 can be guided forward and backward by these rail portions 9a and 9b, respectively, and even when the cushion frame 1 is moved forward slightly, as shown by the chain lines in FIGS. , the front part of the cushion frame 1, that is, the front part of the seat cushion 5, moves diagonally upward, and the other cushion . The hip point at the rear of seat cushion 5, that is, at the rear of seat cushion 5, is adapted to move in a mostly horizontal direction.

As a result, the front part of the seat cushion 5 can be tilted sufficiently, so that the passenger's riding comfort can be greatly improved, and at the same time, the head clearance at the rear part of the seat cushion 5 can be maintained sufficiently. Since you can leave it in place, you won't feel pressured.

In addition, as shown in the figure, instead of interposing the intermediate rail portion 9C between the front rail portion 9a and the rear rail portion 9b to form the integrated bent rail 9, the intermediate rail portion 9C
It may be omitted to provide a separate rail 9 in which the front rail portion 9a and the rear rail portion 9b are separately arranged.

This is because the maximum amount of movement of the seat cushion 5 is generally only small.

By the way, behind the seat back 6 with the back frame 4, this seat pack 6 and partition board 10 are installed.
A drive mechanism 1 capable of driving the back frame 4 is installed in this space S.
1 is installed.

This drive mechanism 11 has the following details as shown in FIG.
The motor is equipped with an electric motor 12 fixed to the vehicle body B, and a male threaded rod 14 connected to the electric motor 12 via a worm gear 13. It is rotatably supported through.

A female-threaded slider 17 is attached to the male-threaded rod 14 so as to be able to reciprocate by being screwed together with the male-threaded rod 14. is connected to.

Therefore, by operating a switch (not shown), the electric motor 1
2 rotates, the male threaded rod 14 rotates, which causes the slider 17 to move, for example, to the right in FIG.
It is tilted as shown by the chain line in Figure 2.

When the electric motor 12 is rotated in the opposite direction, the male threaded rod 14 rotates in the opposite direction, and the slider 17 moves to the left in FIG. Get up as shown.

At this time, since the back frame 4 and the cushion frame 1 are pivotally connected to each other, the seat back 6
When the seat cushion 5 is tilted as shown by the chain line in the figure, the seat cushion 5 also moves slightly forward as shown by the chain line in Figures 1 and 2, and the effect at this time is as described above.

Further, when the seat back 6 returns to the position shown by the solid line in FIGS. 1 and 2, the seat cushion 5 also returns to the first and second positions.
It is designed to return as shown by the solid line in the figure.

In addition, in FIG. 1, the reference numeral 19 indicates a trunk room, and the reference numeral 20 indicates a flexible member that covers the space S above.

According to the above-mentioned configuration, in order to shift the seat posture shown by the solid line in FIGS. 1 and 2 to another posture shown by the chain line in the same figure, a switch (not shown) is activated to rotate the electric motor 12. That's fine.

As a result, the male threaded rod 14 rotates and the slider 17 moves to the right in FIG. 4, so the seat back 6 tilts, and the seat cushion 5 also moves forward accordingly, resulting in the other posture described above. Then, just turn off the above switch.

At this time, the amount of tilt of the front part of the seat cushion 5 is sufficiently large, and the amount of vertical movement of the hip point at the rear part of the seat cushion 5 is almost negligible, so that the riding comfort is greatly improved.

Next, in order to return from the state shown by the chain line in Figures 1 and 2 to the state shown by the solid line in the same figure, operate the switch again.
The electric motor 12 may be rotated in the opposite direction.

As a result, the male threaded rod 14 rotates in the opposite direction and the slider 17 moves to the left in FIG. 4, so the seat back 6 rises and the seat cushion 5 also moves backward.
When the state shown by the solid line in FIGS. 1 and 2 is reached, the above switch can be turned off.

Note that stopping of the electric motor 12 in the drive mechanism 11 can also be automatically controlled.

For example, a limit switch with a return spring may be interposed in addition to the above switch so that the electric motor 12 automatically stops when the mover 17 reaches the right or left end of the male threaded rod 14.

As described in detail above, the posture adjustable power seat of the present invention provides the following effects and advantages.

(1) The rail 9 that guides the cushion frame 1 includes a front rail portion 9a that is disposed upwardly and inclined forward to guide the front portion of the cushion frame 1 back and forth, and a rear portion of the cushion frame 1. Since the rear rail portion 9b is arranged almost horizontally to guide the seat cushion 5 back and forth, even when the cushion frame 1 is moved forward slightly, the front portion of the seat cushion 5 will not tilt. Since a sufficient amount of head clearance can be secured at the rear of the seat cushion 5 and a sufficient head clearance can be secured at the rear of the seat cushion 5, the riding comfort for the occupant can be greatly improved.

(2) Drive mechanism 11 capable of driving the L back frame 4
is installed in the surplus space S behind the back frame 4, the seat cushion can be made sufficiently thick compared to the conventional means in which the drive mechanism is installed below the seat cushion. The ride comfort is greatly improved.

[Brief explanation of the drawing]

The figures show a posture-adjustable power seat as an embodiment of the present invention. Fig. 1 is a side view thereof, Fig. 2 is a perspective view for explaining its structure, and Fig. 3 is the same as Fig. 2. III-I
A cross-sectional view taken along the arrow II, and FIG. 4 is an enlarged side view showing the drive mechanism. 1...Cushion frame, 2...Connecting member, 2a...Elongated hole, 3...Bracket, 4...Back frame, 4a・・・・・・
・Engagement protrusion of back frame 4, 4b... Fixed protrusion of back frame 4, 5... Seat cushion, 6... Seat pack, 7...・
Roller, 8...leg, 9...rail,
9a...Front rail part, 9b...Rear rail part, 9C...Intermediate rail part, 10
...Partition board, 11...
Drive mechanism, 12... Electric motor, 13...
Worm gear, 14... Male threaded rod, 15...
...Casing, 16...Bearing, 17...
...Mover, 18...Link, 19...
...Trunk room, 20...Flexible member, R
S...Seat, B...Body, S...
...Space behind back frame 4.

Claims (1)

[Scope of utility model registration request] It has a cushion frame whose middle part is pivoted to the vehicle body, and a back frame whose rear end is pivoted to the lower end of the cushion frame, and a rail that guides the cushion frame moves the front part of the cushion frame back and forth. The cushion frame is configured to have a front rail portion that is disposed upwardly and inclined forward to guide the cushion frame, and a rear rail portion that is disposed substantially horizontally to guide the rear portion of the cushion frame back and forth,
An attitude-adjustable power seat characterized in that a suspension drive mechanism for driving the back frame is installed in a space behind the back frame.