JPH0336303Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a front seat for a vehicle, and specifically relates to a variable seat cushion length structure.

(Prior art) Conventionally, the length of the seat cushion of the front seat of a vehicle has been formed to a length based on a person of a standard size, and in most cases, the seat cushion and seat back slide back and forth as one unit. It was configured to do this.

(Problem to be solved) Therefore, when a person with a smaller than standard build sits in the front seat and drives a car, even if the seat is slid forward, the length of the thigh does not match the seat cushion. Because the length does not match, it is not possible to sit deeply, and this creates a gap between the body and the seat back, making it difficult to drive in a comfortable position. Even if you slide the seat back and sit down, the length of your thighs is longer than the length of the seat cushion, so even if you sit deeply, you will not be comfortable.

(Means for Solving the Problems) The present invention was made to solve the above-mentioned problems of the conventional technology. The purpose is to provide a seat cushion length variable structure that can be adjusted to the optimal seat cushion length according to the body physique by giving a difference between A pair of left and right seat tracks are provided, each consisting of an upper rail that is slidably provided on the left and right upper rails, and an upper arm that is mounted in an upright manner along almost the entire length of the left and right upper rails, and an upper arm with a seat back attached to the rear side is installed so as to be tiltable forward. A reclining lower arm is provided, and a slide guide groove is provided at the front and rear of the lower arm, and a seat cushion is provided in the slide guide groove so as to be slidable in the front and rear direction via a slide support pin. Attach a first rack and a second rack to the opposite side of the seat cushion, respectively.
Moreover, a support member is provided at a predetermined position of the lower rail to provide a first pinion having a predetermined base circle diameter that meshes with the first rack, and a base circle diameter that is different from the base circle diameter of the first pinion that meshes with the second rack. The seat cushion has a variable length structure configured to integrally rotatably support a second pinion having a basic circular diameter via an axis pin.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings. In the figure, 1 is the entire front seat, and the seat back 2 of the front seat 1 is the upper arm 5 of the reclining 4 and the inner hinge 7. The seat cushion 3 is provided so that it can be tilted forward via the slide support pins 15 provided on the left and right sides of the front and rear parts, and the seat cushion 3 is inserted into the ride guide grooves 12 and 13 provided at the front and rear of the lower arm 6 of the recliner 4. The seat cushion 3 is attached to the seat track 8, 9 via a seat cushion length variable mechanism 16.
The seat 1 is connected to an upper rail 11 so as to be slidable in the front and rear directions.

Reference numerals 8 and 9 denote the above-mentioned left and right seat tracks, both of which consist of a lower rail 10 and an upper rail 11. Legs 10a are provided at both ends of the lower rail 10 and are attached to the floor, and the upper rail 11 slides on the lower rail 10. They are movably provided in a mating manner. In addition, the lower arm 6 of the reclining 4 is attached to the upper surface of the upper rail 11 in a rising manner over almost its entire length, and the seat cushion 3 is guided and supported in the front and rear direction at the front and rear parts of the left and right lower arms 11. Slide guide grooves 12 and 13 having a predetermined length are correspondingly provided horizontally therethrough. Slide support pins 15 are inserted through the slide guide grooves 12 and 13 provided in this way through the pushers 14, and each slide support pin 15 is attached to the front and back of the left and right side surfaces of the seat cushion frame 3A, respectively. The seat cushion 3 is attached to the lower arm 6 via slide guide grooves 12 and 13 so as to be slidable in the front and rear directions. A seat cushion length variable structure 16 is interposed between the seat cushion 3 mounted in this manner and the left and right seat tracks 8 and 9.

Reference numeral 16 denotes the above-mentioned seat cushion length variable mechanism, which is provided symmetrically. To explain the value change mechanism 16 on the left side in the figure, 17 is a support member that adjusts the length of the lower rail 10 of the seat tracks 8 and 9 to a predetermined position. (In this example, it is mounted almost at the center), and the supporting member 17
is formed into a substantially L-shaped cross section by a horizontal mounting piece 18 and a support piece 19 rising upward from the same end, and a bearing hole 20 for rotatably supporting a shaft pin 21 is provided at the upper end side of the support piece 19. is installed through it.

21 is the above-mentioned axial pin, and the coaxial pin 21
A flange 22 for a stopper is formed on the flange 22 , and a shaft 23 rotatably fitted into the bearing hole 20 is formed on one side of the flange 22 . A square shaft portion 24 having a rectangular cross section is formed on the side to fit and fix pinions 25 and 26 therein.

25 and 26 are a first pinion and a second pinion, the first pinion 25 meshingly engages with the first hole rack 28 attached to the lower arm 6, and the second pinion 26 is engaged with the seat cushion frame 3A. The base diameter of the first pinion 25 is larger than the base diameter of the second pinion 26, and its circumferential length is equal to the circumferential length of the pinion 26. A square hole 27 is formed in the center of both pinions 25 and 26 to fit into the square shaft portion 24 of the shaft pin 21.
is installed through it. Reference numeral 28 denotes a first hole rack that engages with the first pinion 25, and is attached by welding means or the like along a predetermined position on the inner surface of the lower arm 6 of the recliner 4.
The horizontal rack plate 29 and the mounting piece 30 form a substantially L-shaped cross section, and the rack plate 29 has engagement holes 31 that mesh with the pinion teeth of the first pinion 25 at predetermined intervals along its longitudinal direction. It is installed through. Reference numeral 32 denotes a second hole rack that engages with the second pinion 26, and is fixed by welding means or the like along a predetermined position on the side surface of the seat cushion frame 3A, so that the rack can be fixed horizontally. The rack plate 33 to be attached and the mounting piece 34 form a substantially U-shaped cross section, and the rack plate 33 has engagement holes 35 that mesh with the pinion teeth of the second pinion 26 at predetermined intervals along its longitudinal direction. It is installed through.

The thus formed support member 17 is fixed to a predetermined position of the lower rail 10 via the attachment piece 18 by welding means or the like, and the shaft pin 21 is inserted into the bearing hole 20 of the support piece 19 and the coaxial pin 21 A first pinion 25 and a second pinion 26 are respectively fitted into the square shaft portion 24 of the
The hole rack 28 and the second hole rack 32 are meshed and engaged. In the variable mechanism 16 formed in this way, when the upper rail 11 is slid toward the front side along the lower rail 10, the first hole rack 28 attached to the lower arm 6 is also moved together with the first hole rack 28 that is meshed and engaged with the upper rail 11. When the pinion 25 is rotated via the shaft pin 21, the second pinion 26 fixed to the coaxial pin 21 is also rotated together, and the seat cushion is equipped with a second hole rack 32 that engages with the second pinion 26. 3 is a slide guide groove 12,1 via a slide support pin 15.
3 to the front side.

Note that, although not shown, an upper rail 11 and a lower rail 1 are attached to either one of the seat tracks 8 and 9.
The lower rail 10 is provided with a conventionally known seat slide locking device for locking the lower rail 10 in a predetermined position.
The upper rail 11 is configured to be locked in a required position. Furthermore, when the front seat 1 is set at the farthest rear of the vehicle as shown by the solid line in FIG. The length is set to approximately match the length of the section. Further, the state in which the front seat 1 is set furthest forward is referred to as the front most position.

Next, the operation and effects of this embodiment configured as described above will be explained.

Now, in this embodiment, left and right seat tracks 8 and 9 are provided which are made up of an upper rail 11 that is slidably provided on a lower rail 10, and slide guide grooves 12 and 13 are provided in the front and rear portions of the lower arm 6 of the recliner 4 that is mounted on the upper rail 11. The seat cushion 3 is provided in the slide guide grooves 12 and 13 so as to be slidable in the front-rear direction via the slide support pin 15, and the lower arm 6 and the seat cushion 3 of the seat cushion 3 disposed opposite to the lower arm 6 are provided. A first hole rack 28 and a second hole rack 32 are respectively attached to the side surfaces of the lower rail 10, and a support member 17 is provided at a predetermined position on the lower rail 10, and has a predetermined basic circle diameter that engages with the first hole rack 28. The first pinion 25 meshes with the second hole rack 32 and rotatably supports the second pinion 26 having a base circle diameter smaller than the base circle diameter of the first pinion 25 via the shaft pin 21. This is what I did. Therefore, when the front seat 1 is in the rear most position shown by the solid line in FIG. When pushed to the right, the upper rails 11 of the left and right seat tracks 8 and 9 are slid along the lower rail 10. As the upper rail 11 moves, the lower arm 6 attached to the upper rail 11
The first hole rack 28 is also moved together, and the first pinion 25, which is meshed and engaged with the first hole rack 28, is moved to the shaft pin 21.
(6th
(see figure). A second pinion 26 is integrally attached to the shaft pin 21 by the rotation of the first pinion 25.
The second pinion 26 and the second hole rack 32 which are engaged with the second pinion 26 are moved forward, and the seat cushion 3 to which the second hole rack 32 is attached is also moved forward together. be done. .
Therefore, when the front seat 1 is moved from the rear most position to the front most position as shown in FIG. The position indicated by the three-dot chain line, that is, the upper rail 11 is moved with the same amount of movement S1 as the amount of movement S1, but in this embodiment, the base circle diameter of the second pinion is set from the base circle diameter of the first pinion 25. Since it is provided small, the seat cushion 3 is given a movement amount S2 that is shorter than the movement amount S1 by a distance ΔS with respect to the movement amount S1 of the upper rail 11. Therefore, as shown in FIG. 6, the distance between the attachment center C of the upper arm 5 of the lower arm 6 attached to the upper rail 11 and the rear end E of the seat cushion 3 is the distance t at the rear most position. In addition, at the front most position, the seat back 2 attached to the upper arm 5 is moved forward by the distance △S at a distance t + △S, and the seat cushion length L is substantially the length L - △.
It is reduced to S. Therefore, by selecting the optimum length between the reduction lengths ΔS in the process of moving from the rear most position to the front most position, it is possible to obtain a cushion length that is suitable for a person with a standard physique or a person with a small physique.

In this way, by sliding the front seat 1 from the rear most position to the front most position, the seat cushion 3 and the seat back 2 are moved relative to each other and the cushion length can be changed. The cushion length can be set to the optimum length according to your body physique, allowing you to sit in an extremely comfortable posture.

In the above embodiment, the shaft pin 21 is supported horizontally, but is not limited to this. For example, it may be supported vertically, and in this case, the hole racks 28 and 32 are Can be replaced with a tooth-shaped rack. Further, although the seat cushion length variable mechanism is provided on the left and right sides in the example, the present invention is not limited to this, and may be provided on either the left or the right.

(Effects of the invention) Now, the present invention provides a pair of left and right seat tracks consisting of upper rails that are slidable in the front and back direction along a lower rail attached to the floor, and runs along the entire length of the thighs on the left and right upper rails. A reclining lower arm is installed in an upright manner, and an upper arm with a seat back attached to the rear side is attached so as to be tiltable forward. Slide guide grooves are provided at the front and rear of the lower arms, and the seat cushion is installed in the slide guide grooves. is provided so as to be slidable in the front and back direction via a slide support pin, and a first rack and a second rack are respectively attached to the lower arm and the side surface of the seat cushion provided opposite to the lower arm, and furthermore, a first rack and a second rack are installed at a predetermined position of the lower rail. a first pinion having a predetermined base circle diameter that meshes with the first rack; and a second pinion that has a base circle diameter that is different from the base circle diameter of the first pinion that meshes with the second rack. By adopting a structure in which the pinion and the pinion are rotatably supported together via the shaft pin,
By sliding the front seat from the rear most position to the front most position, the seat cushion and seat back are moved relative to each other in conjunction with this, and the cushion length can be changed, making it possible to create the optimal cushion according to the outside of the body. It is an extremely practical idea as a cushion length variable structure because it can be set to a long cushion length and can be seated in an extremely comfortable posture.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a perspective view of the front seat, FIG. 2 is a sectional view taken along the line -- in FIG. 1, FIG.
The figure is an exploded perspective view of the cushion length variable mechanism, and FIGS. 5 and 6 are explanatory diagrams illustrating changes in the cushion length. 1...Front seat, 2...Seat back,
3... Seat cushion, 4... Reclining, 6... Lower arm, 8, 9... Seat track, 10... Lower rail, 11... Upper rail, 12, 13... Slide guide groove, 15...
Slide support pin, 16... Seat cushion length variable mechanism, 17... Support member, 25, 26... Pinion, 28, 32... Rack.

Claims (1)

[Scope of utility model registration request] A pair of left and right seat tracks are provided, each consisting of an upper rail that is slidable in the front and back direction along a lower rail attached to the floor. A reclining lower arm is provided on which the Atsupa arm is attached so that it can be tilted forward, and a slide guide groove is provided at the front and rear of the lower arm, and the seat cushion is slid in the front and rear direction through the slide support pin in the slide guide groove. A first rack and a second rack are respectively attached to the lower arm and a side surface of a seat cushion opposite to the lower arm, and a support member is provided at a predetermined position of the lower rail to connect the first rack and the second rack. a first pinion having a predetermined base circle diameter that meshes with the second rack; and a second pinion that has a base circle diameter that is different from the base circle diameter of the first pinion that meshes with the second rack.
Seat cushion length variable structure in which the pinion is rotatably supported integrally with the pinion via the shaft pin.