JPH07149172A - Seat slide device - Google Patents

Abstract

PURPOSE:To continuously adjust a seat side rail into a desired longitudinal position by hand relative to a vehicle body side rail, and in addition set the price inexpensive without causing high cost like the case of a motor-driven type. CONSTITUTION:A screw member 30 is rotatably supported with a seat side rail 22, meanwhile a nut member 40 which is relatively moved longitudinally while threadedly engaging with the screw member 30 rotatably when a load in the longitudinal direction is applied on the seat side rail 22, is fixedly provided on a vehicle body side rail 21, and a part 33 to be engaged is provided on the front end part of the screw member 30. Meanwhile, on the side of the part 33 to be engaged, a lock member 60 is provided, which can be operated to displace itself to a lock position where it is engaged with the part 33 so as to restrain the screw member 30 not rotatable, and to an unlock position where it is disengaged from the part 33 so as to make the screw member 30 rotatable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a vehicle body side rail and a seat side rail which is arranged so as to be movable back and forth along the vehicle body side rail and supports a seat. The present invention relates to a seat slide device that can be moved back and forth relative to a side rail.

[0002]

2. Description of the Related Art A conventional seat slide device of this type is, for example, one shown in FIGS. Figure 5
Shown in FIG. 1 is a manual seat slide device, which is a vehicle body side rail 1 to which a seat side rail 2 is fitted,
A plurality of lock grooves 3 are continuously provided in the front-rear direction on the vehicle body side rail 1. On the other hand, the seat side rail 2 is provided with a claw member 4 of a lock mechanism that can be fitted into the locking groove 3 of the vehicle body side rail 1. In such a manual seat slide device, the seat side rail 2, that is, the seat is fixed at a desired front-rear position by operating the claw member 4 and sequentially fitting the lock member 3 into the locking groove 3.

FIG. 6 shows a drive section of an electric seat slide device, which is fixedly mounted on a seat side rail so as to rotatably support the screw member 5. Further, a gear box 6 for decelerating and transmitting the rotational force of the electric motor 8 and a nut member 7 fixedly mounted on the vehicle body side rail and screwed rotatably to the screw member 5 are provided. As shown in FIG.
The gear box 6 includes a worm gear 6a that is directly driven to rotate by an electric motor 8 and a helical gear 6b that is fixed to the end of the screw member 5 and meshes with the worm gear 6a so as to be capable of transmitting power.

[0004]

However, in such a conventional seat slide device, first, in the case of the manual type shown in FIG. 5, first, a plurality of vehicle body side rails 1 are continuously provided, and locking grooves 3 are provided in the seat side rails. Since the claw member 4 on the second side is appropriately fitted and fixed at that position, the position adjustment is rough for each locking groove 3, and there is a problem that fine adjustment cannot be performed and usability is not good. It was

In the case of the electric type shown in FIGS. 6 and 7,
While the front-back position of the seat-side rail with respect to the vehicle-body-side rail can be adjusted steplessly, many parts such as the worm gear 6a are required in addition to the electric motor 8 and the gear box 6, and the cost increases accordingly. There was a problem that the price had to be set high.

The present invention has been made by paying attention to such a conventional problem, and it is possible to adjust the seat side rail to the desired front and rear position steplessly with respect to the vehicle body side rail. In addition, it is an object of the present invention to provide a seat slide device that can be set at a low price without incurring a cost increase as in the electric type.

[0007]

SUMMARY OF THE INVENTION The gist of the present invention for achieving such an object is to provide a rail (2) on a vehicle body side.
1) and a seat side rail (22) which is arranged so as to be movable back and forth along the vehicle body side rail (21) and which supports a seat (10).
And a seat slide device (20) that is capable of manually moving the seat side rail (22) back and forth relative to the vehicle body side rail (21),
One of the vehicle body side rail (21) and the seat side rail (22) rotatably supports the front and rear ends of the screw member (30) along the longitudinal direction of the rail (21, 22), while the vehicle body When a load is applied to the other of the side rail (21) and the seat side rail (22) in the front-back direction with respect to the seat side rail (22), the screw member (3
0) is fixed, and a nut member (40) that is screwed so as to be relatively movable back and forth while rotating is fixed, and the screw member (30)
The engaged portion (33) is provided on either one of the front and rear ends of the screw, and the screw member (30) is engaged with the engaged portion (33) beside the engaged portion (33). A lock member (60) that can be displaced is provided at a lock position that locks non-rotatably and a lock release position that separates from the engaged portion (33) and makes the screw member (30) rotatable. The present invention resides in a seat slide device (20).

[0008]

When the seat (10) is in the normal seated state, the lock member (60) is in the lock position where it engages with the engaged portion (33) provided on the screw member (30), whereby The screw member (30) is non-rotatably restrained. Therefore, the seat (10) is fixed at a predetermined front and rear position. When adjusting the front-rear position of the seat (10), first, the lock member (60) is engaged with the engaged portion (33).
Displace to the lock release position. As a result, the screw member (30) becomes rotatable.

Thus, when the screw member (30) is rotatable, the seat (10) can be moved back and forth to a desired position. That is, the seat side rail (2
When a load is applied in the front-back direction to 2), the screw member (30) causes the nut member (40) fixed to the other rail different from the rail to which the screw member (30) is fixed. Since the screw member (30) rotates while being screwed into the nut member (40), the nut member (40) is gradually fed relatively in the front-rear direction. So the seat (10),
That is, the seat side rail (22) is replaced by the vehicle body side rail (2
Moves forward and backward in response to 1).

When the seat (10) has been moved to the desired front-rear position, the lock member (60) is returned to the lock position and the engaged portion (33) of the screw member (30) is returned. , The screw member (30) is non-rotatably restrained and the seat (10) is fixed at that position.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of the present invention. As shown in FIGS. 2 and 4, the seat 10 is installed on the vehicle body floor so that the front-rear position can be adjusted via a seat slide device 20. The seat slide device 20,
A vehicle body side rail 21 fixed to the vehicle body floor via leg members 11 and 12, and a seat side rail 22 facing the vehicle body side rail 21 so as to be movable back and forth and directly supporting the seat 10.

As shown in FIG. 1, the vehicle-body-side rail 21 is made of a plate-shaped member and actually extends in a narrow width along both sides of the bottom of the seat 10. Similarly, the seat side rail 22
Also comprises a plate-shaped member extending in a narrow width. Seat side rail 22
Are arranged on the vehicle body side rail 21 so as to be movable back and forth via a drive mechanism. As shown in FIG. 4, the bottom portion of the seat cushion of the seat 10 is mounted on the seat-side rail 22.

The drive mechanism of the seat slide device 20 is fixed to the seat side rail 22 so as to be rotatable along the longitudinal direction of the rail and a screw member 30 fixed to the vehicle body side rail 21. Has a nut member 40 for relatively moving the screw member 30 back and forth while screwing the screw member 30 rotatably, and a lock mechanism capable of restraining the screw member 30 in a non-rotatable manner.

The front end portion 31 of the screw member 30 has a front bearing 36 fixed to the seat side rail 22 with a bolt 37.
It is rotatably supported by. On the other hand, the rear end 32
Is also rotatably supported by a rear bearing 38 fixed to the seat-side rail 22 with a bolt 39. Front bearing 3
As shown in FIG. 1, 6 is covered with a housing 50, and the housing 50 is internally provided with a lock mechanism described later.

The screw member 30 is rotatably engaged with the nut member 40 described below when a load is applied in the front-rear direction to the screw member 30 so that the screw member can move relative to the front-rear direction. In addition, it is necessary to set a large lead (that is, a distance that the screw member 40 moves in the axial direction when the screw member 40 is rotated once). In the present embodiment, a triple thread screw is used.

The nut member 40 is fixed to the seat-side rail 21 with a bolt 41 so that it cannot move forward and backward and cannot rotate. The nut member 40 is provided with a screw hole 42 corresponding to a triple thread, and the screw member 30 is rotatably screwed into the screw hole 42 as described above.

The lock mechanism includes an engaged portion 33 provided on the front end portion 31 of the screw member 30 and the engaged portion 3
3 is engaged with 3 to lock the screw member 30 in a non-rotatable manner, and a lock release position in which the screw member 30 is rotatable by being disengaged from the engaged portion 33. Locking member 6 provided in the section
It consists of zero.

More specifically, as shown in FIGS. 1 and 3, the engaged portion 33 is provided in a substantially conical shape at the front end portion 31 of the screw member 30 projecting further forward than the front bearing 36. A dish-shaped recess 34 is formed on the front end surface thereof. Further, serrations 35 are provided on the inner surface of the dish-shaped recess 34.

On the other hand, the lock member 60 includes a bevel gear type engagement portion 62 which is fitted in the dish-shaped recess 34 of the engaged portion 33.
The engaging portion 62 is composed of a shaft portion 61 whose tip side is continuous. A serration 63 is provided on the outer surface side of the engaging portion 62. The shaft 61 is provided with a key groove for preventing rotation.

The lock member 60 is mounted on the front portion of the housing 50 so as to be displaceable between the lock position and the lock release position. Normally, the elastic force of the coil spring 64 causes the lock member 60 to engage therewith. Is urged so as to be fitted into the dish-shaped recess 34 of the engaged portion 33. An operation handle 70 for pulling the lock member 60 is connected to the base end side of the lock member 60.

Next, the operation will be described. As shown in FIG. 4, when the seat 10 is in a normal seated state, the lock member 60 constituting the lock mechanism of the seat slide device 20 is
The screw member 3 is generated by the elastic force of the coil spring 64.
It is urged to the lock position where it engages with the engaged portion 0 of 0. That is, in FIG. 1, the bevel gear type engagement portion 62 of the lock member 60 is fitted in the dish-shaped recess 34 of the engaged portion 33.

As a result, the screw member 30 is constrained to be non-rotatable, so that the seat 10 is immovably fixed at a predetermined front and rear position. On the other hand, when adjusting the front-back position of the seat 10, first, the operation handle 70 is pulled against the biasing force of the coil spring 64, and the lock member 6 is pulled.
The engaging portion 62 of 0 is displaced to the lock release position where it is disengaged from the dish-shaped recess 34 of the engaged portion 33.

When the locking member 60 is displaced to the unlocked position, the screw member 30 becomes rotatable,
At this time, do not push the seat 10 to a desired position by hand,
It can be moved back and forth. That is, when a load is applied to the seat-side rail 22 in the front-rear direction, the screw member 30 rotates while being screwed into the nut member 40 fixedly mounted on the vehicle body-side rail 21.
0 is gradually fed in the front-rear direction relative to the nut member 40.

Therefore, the seat 10, that is, the seat-side rail 22 can be manually moved in the front-rear direction with respect to the vehicle-body-side rail 21 and appropriately adjusted to a desired front-rear position. When the seat 10 has been moved to the desired front-back position, the locking member 60 is returned to the locking position again, and the engaging portion 62 of the locking member 60 is moved to the dish-shaped recess 34 of the engaged portion 33 of the screw member 30. , The screw member 30 is non-rotatably restrained, and the seat 10 is fixed at that position.

In this embodiment, while the screw member is rotatably supported on the seat side rail and the nut member is fixedly mounted on the vehicle body side rail, the screw member is rotated on the vehicle body side rail in the opposite manner. While supporting possible,
A nut member may be fixed to the seat side rail.

[0026]

According to the seat slide device of the present invention, when a screw member is supported on one rail and a load is applied to the one rail in the front-rear direction, the screw member is relatively moved forward and backward. Since the nut member that is rotatably screwed while moving is fixed to the other rail, the front-rear position of the seat can be manually adjusted steplessly, which improves usability.

Further, while an engaged portion is provided at the end of the screw member, a lock member which engages with the engaged portion and locks the screw member non-rotatably is provided beside the engaged portion. Since it is provided, the seat can be adjusted to a desired front-back position with a simple configuration and then appropriately fixed at such a position, so that the price can be set inexpensively without incurring high cost unlike the electric type. You can also

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a seat slide device according to an embodiment of the present invention.

FIG. 2 is a side view showing a seat slide device according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a main part of a lock mechanism that constitutes a seat slide device according to an embodiment of the present invention.

FIG. 4 is a side view showing a seat provided with a seat slide device according to an embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional seat slide device.

FIG. 6 is a perspective view showing a drive mechanism of another conventional seat slide device.

FIG. 7 is an exploded perspective view showing a drive mechanism of another conventional seat slide device.

[Explanation of symbols]

 10 ... Seat 20 ... Seat slide device 21 ... Vehicle side rail 22 ... Seat side rail 30 ... Screw member 33 ... Engagement part 40 ... Nut member 60 ... Lock member 62 ... Engagement part

Claims (1)

[Claims] 1. A vehicle body side rail, and a seat side rail that is arranged so as to be movable back and forth along the vehicle body side rail to support a seat, and the seat side rail is manually opposed to the vehicle body side rail. In a seat slide device that can be moved forward and backward, one of the vehicle body side rail and the seat side rail rotatably supports the front and rear ends of a screw member along the longitudinal direction of the rail, while the vehicle body side On the other of the rail and the seat side rail, when a load in the front-back direction is applied to the seat-side rail, a nut member that is screwed so as to be relatively movable back and forth while the screw member rotates is fixedly provided, and the screw While the engaged portion is provided on either one of the front and rear end portions of the member, a lock position that engages with the engaged portion and locks the screw member non-rotatably beside the engaged portion,
A seat slide device, comprising: a lock member that is displaceable at a lock release position where the screw member is disengaged from the engaged portion and makes the screw member rotatable.