JPH068091B2 - Emergency drive system for automobile seat adjusters - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an emergency drive device for an automobile seat or a device for adjusting a part of an automobile seat, and more particularly to a gear for automatically locking, and driving the gear. The invention relates to an emergency drive for an adjusting device of a motor vehicle seat, to which an electric motor and a manually operable emergency drive member are connected.

[Prior art]

In the case of this type of known emergency drive (German publication 2733484) for gears, which adjusts the tilt position of the backrest of the car seat and automatically locks to lock the backrest in the selected tilt position. The operating member is arranged in the drive shaft formed in the hollow of the gear for automatic locking,
By means of this operating member, the coupling disc fixedly arranged on the drive shaft can be disengaged from the meshing with the gear that can be driven by the motor, whereby a gear for automatic locking for emergency drive. Can be disengaged from the drive motor. In addition, the drive shaft of the gear for automatic locking is provided with a polygonal extension, whereby the coupling to the drive motor can be removed beforehand and then the drive shaft can be manually operated using a screw wrench. Can be rotated. Not only is this type of method very expensive, but in the case of emergency drive, the position of the extension of the gear to which the screw wrench is connected depends on the arrangement of the gear, and usually the self-locking power including this gear is used. Since the transmission device is in a convenient position for the part of the car seat driven thereby, it is less of a problem in the case of the car seat back as described above, but in the case of other parts of the car seat, This extension may be in a very inaccessible position.

[Object of the Invention]

Therefore, an object of the present invention is to provide an inexpensive emergency drive device for an automobile seat or a part of the adjustment device thereof, in which the connection position of an emergency drive member such as a screw wrench at the time of emergency drive can be freely set. Is to provide.

[Structure of Invention]

An emergency drive device for a vehicle seat or a part of its adjusting device according to the invention comprises an automatic locking power transmission device, an electric motor, and a flexible shaft connecting the electric motor to a driving side of the automatic locking power transmission device, A first gear mounted on the flexible shaft so as not to rotate, and a second gear that constantly meshes with the first gear, and a coupling means for engaging by a manually rotatable emergency drive member. And a second gear that is provided.

〔The invention's effect〕

No electric motor is already used by connecting the electric motor and the drive side of the self-locking gear via a flexible shaft, and by connecting the emergency drive member and one end of this flexible shaft in a non-rotating manner. Regardless of where the gear to be driven with the emergency drive member is sometimes located, there is no difficulty in providing the emergency drive device in an easily accessible position on the vehicle seat. Furthermore, the coupling of the emergency drive member with one end of the flexure shaft via two gears makes the cost for the emergency drive very low.

If the end of the flexible shaft, which is connected to the drive side of the self-locking gear, is accessible, the first gear can be arranged on this end. However, it is usually preferable to place the first gear on the end of the flexure shaft which is connected to the electric motor. This means that the flexible shaft can then be used, in part, to position the emergency drive in a position that is easily accessible, regardless of the arrangement of the gears for automatic locking, and on the other hand the electric motor or this This is because the second gear can be supported in the holder that is fixed to the casing of the gear casing that is structurally integrated. The holder then does not have to be adapted to different specifications of the self-locking gear, but only to the motor casing or its gear, which often have the same shape.

Depending on whether the two gears are formed as spur gears or for example as bevel gears, the relative position of the rotary shaft of the emergency drive member with respect to the rotary shaft of the flexure shaft can be selected differently. Further, regardless of the structure of the gear, the connecting means with which the emergency drive member is engaged may be, for example, a polygonal groove provided on the axis of the second gear.

〔Example〕

Next, details of the present invention will be described based on an embodiment shown in the drawings.

A motor vehicle seat 1, a part of which is shown schematically, is supported in a known manner by a pair of longitudinally extending rails of the seat, one of which is mounted on or at the floor of the motor vehicle. The guide rail 2 is fixed to the support and the other is a slide rail 3 connected to the base of the vehicle seat 1, which slide rail is aligned with the guide rail 2 transversely to its longitudinal direction. However, the guide rail 2 is slidably guided in the vertical direction. The longitudinal movement of the slide rail 3 in the guide rail 2 is effected by means of a gear which is formed in a known manner and is therefore not shown in the figure, which carries out an automatic locking. This self-locking gear has, for example, a screw spindle and a spindle nut attached thereto, and moves in the longitudinal direction when the screw spindle and the nut rotate relative to each other. The automatic gear locking prevents the seat from unintentionally sliding in the vertical direction.

Driving of a gear for automatic locking, for example, a screw spindle, is performed by an electric motor 4 via a miter gear 5 attached to the electric motor and not automatically locked, and a flexible shaft 6, one of the flexible shafts 6 being provided. Is connected to the output side of the miter gear 5, and the other end is connected to the drive side of the gear for automatic locking. By using the flexible shaft 6, the electric motor 4 and in particular the miter gear 5 can be arranged below the protective cover 8 below the front edge 7 of the seat cushion. Since the longitudinal axis of the electric motor 4 extends in the longitudinal direction of the vehicle seat, the end of the flexure shaft 6 which is connected to the miter gear 5 extends out of the miter gear 5 in the lateral direction of the seat. The flexible shaft 6 is bent and guided to the side of the seat, extends from there to the longitudinal direction of the seat, and is connected to a gear for automatically locking. In contrast to this, it is also possible to guide a second flexible shaft (not shown) from the miter gear 5 to the other side of the seat, where it is connected to a second automatic locking gear. Corresponds to the other pair of rails.

In particular, as shown in FIG. 3, a boss sleeve 10 is attached to the end of the flexible shaft 6 which is connected to the miter gear 5 and which is not provided with the coating 9, and the boss sleeve 10 is attached to the end. A square 1 forming the end of the flexure shaft
1 and the rest of the square 11 meshes with the correspondingly formed housing of the drive shaft of the miter gear 5. A first bevel gear 12 is fixed to the boss sleeve 10 and rotates together with the flexure shaft 6.
The first bevel gear 12 meshes with a second bevel gear 13, and the second bevel gear 12 has a U-shaped bow member 14.
Is rotatably journalled in the web portion of the holder, this arcuate member forming part of a holder 15 fixed to the casing of the miter gear 5. A boss sleeve 10 is rotatably supported in the leg of the arcuate member 14 adjacent to the miter gear 5. On the other leg of the bow member 14,
As shown in FIG. 1, the slit 16 is formed,
This leg allows the leg to be attached to the flexure shaft 6.

The end of the boss hole of the second bevel gear 13 on the side away from the flexure shaft 6 is formed as a hexagonal groove 17. The hexagonal groove is formed so that the flexure shaft 6 can be manually driven by inserting a hexagonal wrench when the electric motor 4 cannot be used, so that the hexagonal groove of the third bevel gear 13 is formed. Groove 1
Reference numeral 7 constitutes an emergency drive member. In particular, as shown in FIG. 1, the rotation shaft of the second bevel gear 13 is directed obliquely upward and upward. Further, the protective cover 8 is formed with an opening 18 aligned with the boss of the second bevel gear 13.
Therefore, the wrench required for emergency drive can be successfully introduced into the hexagonal groove 17 and rotated.

In the case of the second embodiment shown in FIG. 4, the electric motor 104, which is structurally grouped with the miter gear 105 without automatic locking, has an automatic locking grouped in a link fitting (not shown). It is used to drive each gear. By means of this synchronously driven, self-locking gear, which is formed in a known manner, the tilt position of the backrest with respect to the seat part of the motor vehicle seat can be changed infinitely. Furthermore, the backrest is held in the selected tilted position by means of a self-locking gear.

The electric motor 104 and the miter gear 105 are the miter gear 1
The drive shaft of 05 is fixed to the cushion support of the backrest so that it extends laterally of the backrest. The output shafts of the miter gear 105 are respectively provided with flexible shafts 106, 10
6'are connected, which are connected to one or the other of the link fittings and to the drive shaft of the gear for their automatic locking.

The first spur gear 11 is formed on the corner portion 111 of the one flexible shaft 106 connected to the driven side of the miter gear 105.
2 is attached, and the spur gear is prevented from moving in the miter gear direction by the disc 119.
Movement away from 05 is prevented by a bush 120, into which the end of the sheath of the flexible shaft 106 is introduced. The bush 120 is fixed in one side plate of a holder 115 whose bottom is narrowed, and the other side plate is screwed to the casing of the miter gear 105. This bush 120 is a miter gear 1
It is consistent with the driven side of 05.

The first gear 112 and the second spur gear 113 are always meshed with each other, and the second gear is fixed on the boss sleeve 110, which is parallel to the driven shaft of the miter gear 105. It is supported by a side plate having a flexible shaft and supporting the bush 120.

Also in the case of this embodiment, the second gear 113 constitutes an emergency drive member, and therefore the boss hole of the boss sleeve 110 is formed as a hexagonal groove 117. Hexagonal wrench can be inserted. In order to allow this wrench to be easily inserted into the hexagonal groove, a linear guide pipe 121 extending from the second gear 113 to the side of the backrest is provided. The ends are fixed to the cushion support of the backrest and the inner ends are fixed to the holder 115 by means of a connecting plate.

All the features described in the above description and the features that can be understood only from the drawings are components of the present invention as another embodiment even if they are not particularly taken out or described in the claims.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment of a seat length adjusting gear,
FIG. 2 is a top view of the embodiment based on FIG. 1, and FIG.
FIG. 4 is a sectional view taken along line III-III of FIG. 4, and FIG. 4 is a longitudinal sectional view of the embodiment shown in FIG. 1 ... Automotive seat, 2 ... Guide rail, 3 ... Sliding rail, 4 ... Electric motor, 5 ... Miter gear, 6 ... Flexible shaft,
7 ... Front edge of seat cushion, 8 ... Protective cover, 9 ...
Coating, 10 ... Boss sleeve, 11 ... Quad corner, 12 ... First
Bevel gear, 13 ... second bevel gear, 14 ... arcuate portion, 1
5 ... Holder, 16 ... Slit, 17 ... Hexagonal groove, 18 ...
Opening, 104 ... Electric motor, 105 ... Miter gear, 1
06,106 '... flexible shaft, 110 ... boss sleeve, 1
11 ... 4 corners, 112 ... 1st gear, 113 ... 2nd gear, 115 ... Holder, 117 ... Hexagonal groove, 119 ... Disc,
120 ... Bush, 121 ... Guide pipe.

Claims (5)

[Claims] 1. An automatic lock power transmission device, an electric motor, a flexible shaft connecting the electric motor to a drive side of the automatic lock power transmission device, and a first member mounted on the flexible shaft so as not to rotate. A gear and a second gear that is in constant mesh with the first gear and that is provided with a coupling means for being engaged by a manually rotatable emergency drive member. An emergency drive for a regulating device of a featured car seat or part thereof. 2. The housing of a power transmission device, wherein the first gear is arranged at one end of the flexible shaft connected to the electric motor, and the second gear is the housing of the motor or structurally connected thereto. The emergency drive device according to claim 1, which is attached to a holder fixed to the. 3. The emergency drive system according to claim 1, wherein the first and second gears are formed as bevel gears that constantly mesh with each other. 4. The emergency drive system according to claim 1, wherein the first and second gears are formed as spur gears that constantly mesh with each other. 5. The emergency drive system according to claim 1, wherein the connecting means is a polygonal groove provided on the axis of the second gear.