JPH0218741Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a vehicle seat, and more particularly to an improvement in a vehicle seat in which a seat cushion is supported so as to be independently movable and adjustable in the longitudinal direction of the seat.

[Prior art]

In general, this type of vehicle seat consists of a seat cushion and a seat back that stands up behind it, and a seat frame that supports the entire seat is supported on the floor of the vehicle body by a front-back sliding mechanism, etc. The seat is configured so that it can be moved and adjusted in the longitudinal direction of the vehicle body, and can accommodate the body shape and preferences of the occupant. In addition to this, it is also required that only the seat cushion be configured so that it can be moved and adjusted independently in the front and back directions of the seat, allowing the seat to be adjusted to suit the body shape of the occupant, thereby providing greater freedom. has been done. In other words, if the seat cushion is moved independently to the rear of the seat, the pressure on the occupant's thighs will be alleviated and pedal operation will be easier. By moving the seat, it is possible to prevent the thighs of the seated person from floating and to eliminate the instability of the sitting posture.

By the way, what is desired in configuring such a seat cushion so that its movement can be adjusted independently is a simple slide that takes into account the relationship with the longitudinal sliding mechanism of the entire seat and that does not cause problems in terms of space. It has a structure that allows for smooth and proper movement, secure locking at the desired position, and a reasonable structure that can appropriately and reliably support the weight of the occupant.
Furthermore, the adjustment operation is simple and the cost is low. However, the structures that have been proposed so far are complex, they do not allow for proper stepless adjustment, and they also have problems in terms of operation.All of them have advantages and disadvantages, and some countermeasures must be taken. It is hoped that

[Summary of the idea]

The present invention was developed in view of the above circumstances, and provides a vehicle seat in which a seat cushion frame is independently supported so as to be movable and adjustable in the longitudinal direction of the seat. They integrally form a pair of left and right movable side frames that hang down from the inside at appropriate intervals from both left and right edges of the bottom, and whose lower portions are respectively bent outward, and correspond to the lower sides of the seat cushion on both sides. A pair of left and right support frames each having a substantially U-shaped cross section are fixed to the upper rails of a pair of left and right seat slide adjusters which are disposed in the same direction and support the entire seat so as to be movable in the front and rear directions, with their opening sides facing each other. The lower portions of the pair of left and right movable frames are fitted from the opening sides of the pair of left and right support frames, and the movable frames are supported slidably in the longitudinal direction of the seat on the top rail, and the movable frame A rack is fixed to one side so that its upper end is locked to the lower surface of the seat cushion frame, and a pinion that meshes with the rack is rotatably supported on the movable side frame.
With a simple configuration that includes a lock mechanism that selectively restricts the rotation of the pinion, the movement of the seat cushion in the front and back direction of the seat can be easily and steplessly adjusted appropriately, and moreover, it can be reliably positioned at the desired position. In addition, the locking mechanism can be provided inside the bottom of the seat cushion, and sufficient space can be secured for the end treatment of the seat cushion surface material, improving operational reliability of each part. To provide an inexpensive vehicle seat that also has improved performance.

[Example of idea]

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

Figures 1 to 3 show an embodiment of a vehicle seat according to the present invention, and show the main parts of the seat cushion front and rear adjustment mechanism, its locking mechanism, and the seat cushion frame to which these are attached. etc. are shown, and other configurations are omitted.

In these figures, reference numeral 10 indicates the vehicle body floor surface 11.
The lower rails 10a of the pair of seat slide adjusters are arranged below both sides of the seat cushion K of the seat, and the upper rails 10b are fixed to the vehicle floor surface 11. It is assembled so that it can slide freely in the front and rear directions of the seat. Note that both of these seat slide adjusters 10 are attached along the longitudinal direction of the seat, and are locked at predetermined positions by well-known locking mechanisms (not shown), thereby adjusting the longitudinal position of the entire seat. It is configured so that it can be done.

Further, support frames 12 having a substantially U-shaped cross section are fixed to the upper part of the upper rail 10b, with the opening sides facing each other, and sliders made of resin or the like are disposed inside these support frames 12. The L-shaped tip of the movable frame 15 cut and suspended from the seat cushion frame 14 of the seat cushion K through the seat cushion 13 is fitted,
It is independently and slidably supported in the front and rear directions of the seat. The movable side frame 15 hangs down from the inside at an appropriate distance from the left and right side edges of the bottom of the seat cushion frame 14, and is therefore used for the seat such as racks, pinions, and locking mechanisms thereof, which will be described later, provided on the movable side frame 15. It can be formed inside the left and right edges of the seat cushion, and a sufficient space can be provided for the end treatment of the skin material of the seat cushion on both the left and right edges of the seat cushion.

On the other hand, a fixed side frame 16 is provided at the right end of the seat cushion frame 14 and is fixed to a support frame 12 provided on the upper rail 10b. The movable frame 15 and the movable frame 15 are configured to be relatively movable. In the figure, reference numeral 17 denotes a side frame on the movable side that is similarly cut and suspended at the left end of the seat cushion frame 14, facing the movable side frame 15, and its tip is connected to the upper rail 10b. It faces the upper end of the upper support frame 12.

Now, according to the present invention, in the above-described configuration, a long groove 18 is formed along the front and rear direction of the seat in the movable side frame 15 which is integrated with the seat cushion frame 14, and this long groove 18
Rack 2 having rack teeth 20a facing the upper edge of
0 is an inner side wall portion of the movable side frame 15, and its upper end portion is connected to the seat cushion frame 14.
It is fixedly provided so as to be locked at.
In contrast, a shaft 22, which is provided with a pinion 21 that meshes with the rack teeth 20a, is rotatably supported while being fitted between the side frames 16 and 17. Further, the right end of the shaft 22 extends to the outside of the seat through a boss 23 provided on the side frame 16 and having a gear portion 23a, and selectively restricts rotation of the pinion 21 at the outer end thereof. A locking mechanism 24 is provided.

To briefly explain this using FIG. 3, the lock mechanism 24 includes an operating member 27 rotatably supported on the shaft 22 and consisting of a cover member 25 and a mounting plate 26 fixed to the cover member 25; Gear portion 23a provided on the side frame 16 side
The lock release plate 29 rotatably supports a pair of latch claws 28a and 28b that engage with each other from opposite sides, and is fixedly mounted on the shaft 22. That is, these latch claws 28a, 2
8b is pivotally supported by pins 30a and 30b protruding from one side of the lock release plate 29, and
The free ends of the springs 31 are urged toward each other so as to mesh with the gear portion 23a from opposite directions. These latch pawls 28a and 28b serve to lock the rotation of the shaft 22, that is, the pinion 21, in the forward direction and in the reverse direction, respectively.

On the other hand, the mounting plate 26 constituting the operating member 27
Release pins 32a and 32b that engage with the respective latch claws 28a and 28b described above are fixed to the lock release plate 29.
It faces the inner side of each of the rack claws 28a, 28b through an arcuate groove 33 formed in the rear. When the operating member 27 is rotated in either direction on the shaft 22 by a knob 27a attached to the cover member 25 via a nut, one of the release pins 32a and 32b engages the latch claw. Remove one of 28a and 28b from gear part 23a,
It serves to enable the shaft 22, that is, the pinion 21, to rotate in one direction.

According to such a configuration, the knob 27a
By rotating the operating member 27 in either direction via the
a, and remove the shaft 22 or pinion 21.
By making the seat cushion K rotatable in one direction, it is possible to adjust the movement of the seat cushion K in a desired direction. This is because the rotation of the knob 27a causes one of the release pins 32a, 32b to engage with the arcuate groove 33 of the release plate 29.
It is clear from this that the seat cushion frame 14 can be moved either in the front or back direction of the seat via the rack 20 that is engaged with the rotating pinion 21 as the rotation is transmitted to the shaft 22. Furthermore, when the knob 27a is released after adjusting to the desired position, the latch pawls 28a and 28b engage with the gear portion 23a from both directions due to the action of the spring 31, thereby restricting the rotation of the shaft 22, that is, the pinion 21. The seat cushion frame 14 is in a locked state in which its movement is restricted by the rack 20 that meshes with this.

Note that the present invention is not limited to the structure of the embodiment described above, and the shape and structure of each part may be modified and changed as necessary. For example, the lock mechanism 24 may have various structures. It will be easily understood that it may be used.

[Effect of idea]

As explained above, according to the vehicle seat according to the present invention, the movable side frame is integrated with the bottom of the seat cushion frame and hangs down from the inside at an appropriate distance from the left and right side edges of the bottom. The seat is supported so as to be able to slide independently in the longitudinal direction on the top rail of a seat slide adjuster that supports the entire seat so as to be movable in the longitudinal direction;
The rack is fixed to one side of the movable frame so that its upper end is locked to the lower surface of the seat cushion frame, and a pinion that engages with the rack is rotatably pivoted relative to the movable frame. The mechanism is equipped with a locking mechanism that selectively restrains the rotation of the pinion, so the movement of the seat cushion in the longitudinal direction of the seat can be easily and steplessly adjusted, despite the simple and inexpensive structure. This can be done appropriately, and the amount of adjustment can be easily increased by simply changing the length of the teeth, giving a greater degree of freedom in adjustment than before, allowing it to function as a seat. Instead, it has various excellent practical effects, such as being able to securely lock and fix it at a desired position, and further improving operability and operational reliability of each part.

In particular, according to the present invention, since the rack is securely supported and fixed by the seat cushion frame,
It has excellent mounting strength and can reliably maintain the engaged state of the rack and pinion against external forces applied during operation. It can be provided inside the left and right edges, and has advantages such as a simplified structure and a small number of parts, making it easy to assemble.

[Brief explanation of drawings]

The figures show an embodiment of the vehicle seat according to the present invention, in which Fig. 1 is a cross-sectional view of the main part thereof, Fig. 2 is a diagram showing the relationship between the rack and pinion, which are the main parts, and Fig. 3 is a diagram showing the relationship between the rack and pinion.
The figure is a schematic exploded perspective view showing an example of the lock mechanism. In the figure, 10... Seat slide adjuster, 1
0b...Atsupa rail, 12...Support frame,
14... Seat cushion frame, 15... Movable side frame, 16... Fixed side side frame,
17...Movable side frame, 20...Rack, 21...Pinion, 22...Shaft, 24
...Lock mechanism.

Claims (1)

[Scope of utility model registration request] In a vehicle seat in which a seat cushion frame is independently supported so as to be movable and adjustable in the longitudinal direction of the seat, the seat cushion frame is integrated with the bottom of the seat cushion frame and is spaced at an appropriate distance from both left and right edges of the bottom. The left and right frames form a pair of left and right movable frames that hang down from the inside and have their lower parts bent outward, and are arranged below both sides of the seat cushion to support the entire seat so that it can move forward and backward. A pair of left and right support frames having a substantially U-shaped cross section are fixed to the top rails of a pair of seat slide adjusters with their opening sides facing each other, and the movable side of the pair of left and right is connected from the opening side of the pair of left and right support frames. The lower parts of the frames are fitted together, and the movable side frame is supported on the upper rail so as to be slidable in the front and back direction of the seat, and the upper end of the movable side frame is attached to one side of the movable side frame with the lower surface of the seat cushion frame. In addition to fixing the rack in such a way that it is locked, a pinion that engages with the rack is rotatably supported on the movable frame, and a locking mechanism is attached to selectively restrain the rotation of this pinion. Characteristic vehicle seats.