JPH10138804A - Power slide device for automobile seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power slide device for an automobile seat which is simplified its assembling work and facilitated the long sliding of the seat. SOLUTION: A lower rail (fixed rail) 4 which has an opening in the top face in its cross section is integrally provided with a nut part 7 along the longitudinal direction in its inside, an upper rail (movable rail) 2 is provided with a gear unit 13 of a prescribed length which is engaged with the nut part 7 in the inside of the lower rail 4, a first screw gear 16 which is rotated about a shaft orthogonal to the longitudinal direction and inserted from the opening into the lower rail 4 is engaged with the gear unit 13, and the rotation force of the motor 23 is transmitted from the first screw gear 16A to the gear unit 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a power slide device for a vehicle seat.

[0002]

2. Description of the Related Art There is known a power seat sliding device for an automobile seat in which the automobile seat is slid back and forth by an electric motor (for example, see Japanese Utility Model Laid-Open No. 1-99734).

[0003] Generally, as a power slide device for a vehicle seat of this type, either a movable rail (upper rail) fixed to the seat or a fixed rail (lower rail) fixed to the floor extends along the longitudinal direction. A long screw shaft is provided, and a nut portion to be screwed to the screw shaft is provided on the other side, and either the screw shaft or the nut portion is rotated by an electric motor so that the movable rail (seat) can be moved in the front-back direction with respect to the fixed rail. Slide.

The maximum sliding amount of the sheet is determined by the length of the screw shaft. Therefore, in order to increase the maximum sliding amount of the seat, it is necessary to employ a longer screw shaft.

[0005]

However, in such a conventional technique, it is necessary to provide a long screw shaft on a movable rail or a fixed rail, so that it is difficult to assemble the screw shaft.

That is, if the screw shaft is not completely parallel to the movable rails or the like, the screwed state with the nut portion will be adversely affected. Is very difficult.

On the other hand, if the screw shaft is too long, the screw shaft tends to bend on the way, which is disadvantageous in making the seat longer.

The present invention has been made by paying attention to such a conventional technique, and provides a power slide apparatus for an automobile seat in which an assembling operation is simple and the seat can be easily made long. .

[0009]

According to the first aspect of the present invention,
A pair of left and right fixed rails fixed to the floor and a pair of left and right movable rails fixed to the seat are respectively slidably combined in the front-rear direction, and the fixed rail has a cross-sectional shape having an opening on an upper surface and has a longitudinal direction inside. The movable rail is provided with a worm gear of a predetermined length that meshes with the nut portion inside the fixed rail, and the worm gear rotates on an axis perpendicular to the longitudinal direction and is opened from the opening. The worm wheel inserted in the fixed rail is engaged with the worm wheel, and the rotational force of the motor is transmitted from the worm wheel to the worm gear.

According to the first aspect of the present invention, since the fixed rail is integrally provided with the nut portion extending along the longitudinal direction, the nut portion is inevitably completely parallel to the fixed rail. Is easy.

In order to make the seat longer, the worm gear has a predetermined length as it is.
It can be easily realized only by extending the length of the nut portion.

Further, since the worm gear and the nut are meshed with each other, the number of teeth meshing with each other is larger than that of a simple spur gear, and the stopper function for preventing the seat from moving back and forth when the motor is stopped is high.

Further, since the worm gear and the nut portion are provided in the fixed rail, the sliding cross section below the seat (the cross section of the sliding mechanism) is reduced, and dirt and dust hardly adhere to the worm gear and the like. There is no danger of the seat cover or carpet getting caught in the worm gear.

In addition, since the worm wheel which rotates on the orthogonal axis is inserted into the fixed rail from the opening and the worm wheel meshes with the worm gear to transmit the rotational force of the motor, the opening can be kept narrow. .

Therefore, it is possible to prevent the heel of the high heel from entering the opening, and it is difficult for foreign matter, dust and the like to enter from the opening.

According to a second aspect of the present invention, there is provided the power sliding device for an automobile seat according to the first aspect, wherein a rotational force is transmitted to the worm wheel from a group of reduction gears that rotate on an axis perpendicular to a longitudinal direction. It is characterized by that.

According to the second aspect of the invention, in addition to the effect of the first aspect, since the worm wheel rotates about the orthogonal axis, the torque can be easily transmitted from the reduction gear group rotating on the orthogonal axis. .

According to a third aspect of the present invention, there is provided the power sliding device for a vehicle seat according to the second aspect, wherein the left and right reduction gear groups are interlocked by a connecting shaft.

According to the third aspect of the present invention, in addition to the effect of the second aspect, the left and right reduction gear groups are provided and are linked with each other by the connecting shaft. May be provided.

According to a fourth aspect of the present invention, there is provided the power slide device for an automobile seat according to any one of the first to third aspects, wherein the nut portion extends along a longitudinal direction of a bottom portion of the fixed rail. It is characterized by comprising a plurality of grooves formed.

According to the invention described in claim 4, claims 1 to 1 are provided.
In addition to the effect described in any one of 3 above, the number of parts does not increase because the nut portion is a plurality of grooves formed along the longitudinal direction of the fixed rail.

According to a fifth aspect of the present invention, there is provided the power sliding device for an automobile seat according to the fourth aspect, wherein the grooves formed on the bottom surfaces of the left and right fixed rails are inclined in directions symmetric to each other. It is characterized by the following.

According to the fifth aspect of the present invention, in addition to the effect of the fourth aspect, since the grooves on the bottom surface of the fixed rail are formed symmetrically in the left-right direction, rattling of the movable rail in the left-right direction is suppressed. Is done.

According to a sixth aspect of the present invention, there is provided the power sliding device for a vehicle seat according to any one of the first to third aspects, wherein the nut portion is attached to a bottom surface of a fixed rail in a longitudinal direction. And a rack member along the line.

According to the invention of claim 6, according to claims 1 to
In addition to the effect described in any one of 3 above, since the nut portion is a rack member that is a separate component from the fixed rail, there is no need to process the fixed rail, and the formation of the fixed rail is easy.

According to a seventh aspect of the present invention, there is provided the power slide apparatus for an automobile seat according to any one of the first to sixth aspects, wherein the upper surface of the fixed rail is flush with the surface of the floor. It is characterized by.

According to the seventh aspect of the present invention, the first to fifth aspects are provided.
In addition to the effect described in any one of the above items 6, the upper surface of the fixed rail is flush with the surface of the floor, so that the floor can be flattened, and the appearance and getting on and off can be improved.

According to an eighth aspect of the present invention, there is provided the power sliding device for a vehicle seat according to any one of the first to seventh aspects, wherein the movable rail has a notch for holding a worm gear. It is characterized by being formed.

According to the invention described in claim 8, claims 1 to 1 are provided.
In addition to the effect described in any one of the above items 7, not only the mounting of the worm gear is facilitated, but also the worm wheel can be meshed with the worm gear by using the notch.

According to a ninth aspect of the present invention, there is provided the power sliding apparatus for a vehicle seat according to any one of the first to eighth aspects, wherein the worm wheel, the reduction gear group, and the motor are arranged on the seat side in advance. The fixed rail, the movable rail, and the worm gear are assembled so that they can be assembled on the floor side in advance.

According to the ninth aspect of the present invention, the first to fifth aspects are described.
8. In addition to the effects described in any one of the above items 8, the structure on the seat side and the structure on the floor side can be separately assembled and prepared, and in the final assembly stage, the structure on the seat side is assembled to the structure on the floor side. A seat power slide device can be formed.

According to a tenth aspect of the present invention, there is provided the power sliding device for a vehicle seat according to any one of the first to ninth aspects, wherein the worm gear includes a first worm tooth meshing with a nut portion; And a second worm tooth meshing with the worm wheel.

According to the tenth aspect of the present invention, the first aspect is provided.
In addition to the effects described in any one of the above items 9 to 9, since a portion meshing with the nut portion and a portion meshing with the worm wheel are separated, a convenient tooth size can be selected for each portion.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the drawings. In addition, in the figure, Y is the front-rear direction, for example, in FIG. X is a left-right direction (a direction orthogonal to the front-rear direction Y).

FIGS. 1 to 4 show a first embodiment of the present invention. Reference numeral 1 denotes a seat of an automobile, and an upper rail 2 as a pair of left and right “movable rails” is fixed to a lower surface of the seat 1. On the other hand, a lower rail 4 as a pair of left and right “fixed rails” is fixed to the floor 3, and the upper rail 2 is combined with the lower rail 4 so as to be slidable back and forth.

The lower rail 4 has a narrow opening 5 on its upper surface.
And the whole is embedded in the floor 3, and the upper surface of the lower rail 4 and the surface of the floor 3 are flush with each other.

Therefore, the surface of the floor 3 is flattened,
Not only is the appearance good, but there is no risk that the foot will be caught on the lower rail 4 when getting on or off.

Further, since the opening 5 of the lower rail 4 is narrow, as described above, the heel of the high heel is prevented from entering, and dust is hard to enter the lower rail 4.

Further, a plurality of grooves 7 as "nuts" are formed at predetermined intervals along the longitudinal direction on the bottom surface 6 of the lower rail 4. The groove 7 is formed in an inclined state, and the grooves 7 formed in the left and right lower rails 4 are inclined in directions symmetric to each other.

As shown in FIG. 3, the upper rail 2
It has a structure in which two members are joined, has a joint portion 8 in the center, and has a cross-sectional shape having T-shaped portions 9 and 10 above and below it.

With the lower T-shaped part 10 inserted into the cross section of the lower rail 4 and the joint part 8 located in the opening 5, the upper rail 2 and the lower rail 4 are combined so as to be slidable back and forth.

A notch 12 is partially formed near the joint 8 of the upper rail 2.
2, a worm gear 13 having a predetermined length is rotatably held. The worm gear 13 is located in the cross section of the lower rail 4 by being held in the notch 12.

The worm gear 13 has a shape having first worm teeth 14 and second worm teeth 15.

The first worm tooth 14 is provided on the upper rail 2
In the groove 7. A worm wheel 16 provided in a gear box G for reduction is engaged with the second worm teeth 15. The worm wheel 16 is inserted into the lower rail 4 from the opening 5 and meshes with the second worm tooth 15.

The gear box G is provided in a concave portion 17 formed on the lower surface of the seat 1, and the worm wheel 16 rotates around an orthogonal axis 18 extending in the left-right direction. A small-diameter spur gear 19 that rotates on the same orthogonal axis 18 as the worm wheel 16 is further provided in the gear box G,
The small diameter spur gear 19 meshes with another spur gear 20.

Worm wheel 16 rotating on orthogonal axis 18
Is inserted into the lower rail 5 from the opening 5, the narrow width of the opening 5 can be maintained.

Accordingly, it is possible to prevent the heel of the high heel from entering the opening 5, and it is difficult for foreign matter, dust and the like to enter from the opening 5.

The other spur gear 20 rotates about another orthogonal shaft 21, and the orthogonal shaft 21 is also provided with a drive worm wheel 22.

The orthogonal shaft 21 is also connected to the drive worm wheel 22 on the other side as a "connection shaft".

The drive worm wheel 22 on the other side is originally unnecessary, but the motor 23 is provided on the drive worm wheel 22 on the side depending on the meaning of balancing right and left and the type of vehicle. It was to be.

Since the worm wheel 13 rotates about the orthogonal axis 18 while the worm gear 13 rotates about the axis in the front-rear direction, it becomes parallel to the orthogonal axis 21 connecting the left and right structures, The formation of the orthogonal shaft 21 is easy. A drive worm gear 24 to which a shaft of a motor 23 is attached is meshed with one of the left and right worm gears 13. The gear box G includes the worm wheel 16, small-diameter flat gears 19 and 20, a drive worm wheel 22, and a drive worm gear 24.

With the above-described structure, the torque of the motor 23 is transmitted to the worm gear 13 via various gears in the gear box G, and the worm gear 13 is rotated. When the worm gear 13 rotates, the worm gear 1
3 engages with the groove 7 of the lower rail 4, the upper rail 2 slides back and forth with respect to the lower rail 4 together with the seat 1. Since the groove 7 is formed symmetrically,
Play of the upper rail 2 in the left-right direction is suppressed.

Since both the worm gear 13 and the groove 7 are provided in the lower rail 4, the worm gear 1
Dust and dust are hard to adhere to 3 etc. There is no possibility that the cover or the carpet of the seat 1 gets caught in the movable part.

The upper rail 2 and the lower rail 4 slide forward and backward when the motor 23 rotates (sliding function) when the worm gear 13 and the groove 7 mesh with each other, and when the motor 23 stops, the upper rail 2
The structure is such that the forward and backward movement is prevented (stopper function), so that both the slide function and the stopper function are reliable. In particular, in this embodiment, since the worm gear 13 has five teeth and these five teeth are meshed with the five grooves 7 at the same time (in a normal spur gear, only about 1.5 teeth are meshed). Even if an excessive load in the front-rear direction is applied to 1, the meshing state between the worm gear 13 and the groove 7 is not broken.

The maximum sliding amount of the seat 1 is determined by the length of the groove 7 serving as the "nut portion". However, the length of the groove 7 may be increased within the range of the upper rail 2 no matter how long. Since the groove 7 is formed integrally with the upper rail 2, the longitudinal trajectory of the groove 7 always coincides with the upper rail 2. Unlike the conventional screw shaft, the parallel state with the upper rail 2 does not matter.

Therefore, even if the formation length of the groove 7 is increased for the purpose of making the sheet 1 longer, the assembling work of the apparatus does not become difficult. Further, even if the formation length of the groove 7 is extended, the predetermined length of the worm gear 13 can be kept as it is, so that it is easy to realize a long slide.

Further, in this embodiment, the gear box G and the motor 23 are pre-assembled on the seat 1 side, the lower rail 4, the upper rail 2 and the worm gear 13 are pre-assembled on the floor 3 side, and the seat 1 is mounted on the upper rail 2. The power slide device is formed at the stage when the power slide device is mounted.

That is, the lower end of the worm wheel 16 projects downward from the gear box G attached to the seat 1, and the notch 1 of the upper rail 2 is formed.
2, the worm gear 13 is exposed.

Therefore, in the final assembling work, the sheet 1
The worm wheel 16 and the second worm tooth 15 of the worm gear 13 mesh with each other by mounting the worm wheel on the upper rail 2, and a power sliding device for a vehicle seat is completed.

FIG. 5 is a view showing a second embodiment of the present invention. In this embodiment, a rack member 25 as a “nut portion” is attached along the bottom surface portion 6 of the lower rail 26.
The wrap member 25 has a sectional shape as if a normal nut is divided into two, and has rack teeth on its inner surface that can mesh with the worm gear 13, and is always the same as the lower rail 4 by being attached to the bottom surface 6. The locus is in the longitudinal direction (parallel to the lower rail 4). Therefore, even if the length of the rack member 25 is extended for a long slide, the same meshing state with the worm gear 13 is always obtained. Other configurations, functions, and effects are the same as those of the previous embodiment, and redundant description is omitted.

[0061]

According to the first aspect of the present invention, according to the present invention, since the nut portion along the longitudinal direction is integrally provided on the fixed rail, the nut portion is inevitably attached to the fixed rail. It is completely parallel, and the assembling work is easy.
In addition, in order to make the seat longer, the worm gear can be easily realized simply by extending the length of the nut portion while keeping the predetermined length of the worm gear. Further, since the worm gear and the nut portion are meshed with each other, the number of teeth meshing with each other is larger than that of a simple flat gear, and the stopper function for preventing the sheet from moving forward and backward when the motor is stopped is high.

Further, since the worm gear and the nut portion are provided in the fixed rail, the sliding cross section below the seat (the cross section of the sliding mechanism) is reduced, and dirt and dust hardly adhere to the worm gear and the like. There is no danger of the seat cover or carpet getting caught in the worm gear.

In addition, a worm wheel rotating about an orthogonal axis is inserted into the fixed rail from the opening, and the worm wheel meshes with the worm gear to transmit the rotational force of the motor, so that the narrow width of the opening can be maintained. . Therefore, it is possible to prevent the heel of the high heel from entering the opening, and it is difficult for foreign matter, dust and the like to enter from the opening.

According to the second aspect of the present invention, since the worm wheel rotates about the orthogonal axis, the torque can be easily transmitted from the reduction gear group rotating on the orthogonal axis.

According to the third aspect of the present invention, since the left and right reduction gear groups are provided and are linked with each other via the connecting shaft, the motor may be provided on either the left or right reduction gear group.

According to the fourth aspect of the present invention, the number of parts does not increase because the nut portion is a plurality of grooves formed along the longitudinal direction of the fixed rail.

According to the fifth aspect of the present invention, since the grooves on the bottom surface of the fixed rail are formed symmetrically, rattling of the movable rail in the left-right direction is suppressed.

According to the sixth aspect of the present invention, since the nut portion is a rack member that is a separate component from the fixed rail, there is no need to process the fixed rail, and the fixed rail can be easily formed.

According to the seventh aspect of the present invention, since the upper surface of the fixed rail is flush with the surface of the floor, the floor can be flattened, and the appearance and the getting on and off property are improved.

According to the eighth aspect of the present invention, not only can the mounting of the worm gear be facilitated, but also the worm wheel can be meshed with the worm gear by utilizing the notch.

According to the ninth aspect of the present invention, the structure on the seat side and the structure on the floor side can be separately assembled and prepared, and in the final assembly stage, the structure on the seat side is assembled to the structure on the floor side. A seat power slide device can be formed.

According to the tenth aspect of the present invention, the portion meshing with the nut portion and the portion meshing with the worm wheel are separated, so that a convenient tooth size can be selected for each portion.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view showing a power slide device for a vehicle seat according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a power slide device for an automobile seat.

FIG. 3 is a sectional view taken along the line SA-SA shown in FIG.

FIG. 4 is a perspective view showing a peripheral structure of a worm gear and a worm wheel.

FIG. 5 is a sectional view showing a second embodiment of the present invention and corresponding to FIG. 3;

[Explanation of symbols]

 Reference Signs List 1 seat 2 upper rail (movable rail) 3 floor 4 lower rail (fixed rail) 5 opening 6 bottom part 7 groove (nut part) 13 worm gear 14 first worm tooth 15 second worm tooth 16 worm wheel 18 orthogonal axis 21 orthogonal axis (connection) Shaft) 23 Motor 25 Rack member (nut part) G Gearbox Y Front-rear direction X Left-right direction (perpendicular direction)

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[Procedure amendment]

[Submission date] October 24, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

[0009]

According to the first aspect of the present invention,
A pair of left and right fixed rails fixed to the floor and a pair of left and right movable rails fixed to the seat are respectively slidably combined in the front-rear direction, and the fixed rail has a cross-sectional shape having an opening on an upper surface and has a longitudinal direction inside. The movable rail is integrally provided with a nut portion, and the movable rail has a gear unit of a predetermined length meshing with the nut portion inside the fixed rail.
The gear unit is rotated in an axis perpendicular to the longitudinal direction and inserted into the fixed rail from the opening.
The first screw gear is engaged, Giayuni from the first screw gear
The torque of the motor is transmitted to the unit.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

[0011] Further, in order to make the seat longer, it is necessary to keep the predetermined length of the gear unit unchanged.
It can be easily realized only by extending the length of the nut portion.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

Further, since the gear unit and the nut are meshed with each other, the number of teeth meshing with each other is larger than that of a simple spur gear, and the stopper function for preventing the seat from moving back and forth when the motor is stopped is high.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

Further, since the gear unit and the nut portion are provided in the fixed rail, the sliding cross section below the seat (cross section of the sliding mechanism) is reduced, and
Dirt and dust hardly adhere to the gear unit and the like. There is no danger of the seat cover or carpet getting caught in the gear unit .

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

[0014] In addition, the first screw gear that rotates with orthogonal axes inserted in the fixed rail through the opening, the gear the first screw gear
The structure in which the rotational force of the motor is transmitted by meshing with the unit allows a narrow width of the opening to be maintained.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction contents]

According to a second aspect of the present invention, there is provided the power sliding apparatus for a vehicle seat according to the first aspect , wherein
Rotational force is transmitted to the screw gear from a group of reduction gears rotating on an axis orthogonal to the longitudinal direction.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction contents]

According to the second aspect of the invention, in addition to the effect of the first aspect , since the first screw gear rotates about the orthogonal axis, the rotational force is transmitted from the reduction gear group rotating on the orthogonal axis. Easy to do.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction contents]

According to an eighth aspect of the present invention, there is provided a power sliding device for a vehicle seat according to any one of the first to seventh aspects, wherein the movable rail has a cutout for holding a gear unit. Is formed.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0029

[Correction method] Change

[Correction contents]

According to the invention described in claim 8, claims 1 to 1 are provided.
7. In addition to the effect described in any one of the above items 7, not only the mounting of the gear unit is facilitated, but also the first
The screw gear can be meshed with the gear unit .

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0030

[Correction method] Change

[Correction contents]

According to a ninth aspect of the present invention, there is provided the power sliding apparatus for a vehicle seat according to any one of the first to eighth aspects, wherein the first screw gear , the reduction gear group, and the motor are arranged in advance. The fixed rail, the movable rail, and the gear unit have a structure that can be assembled to the floor side in advance.

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0032

[Correction method] Change

[Correction contents]

According to a tenth aspect of the present invention, there is provided a power sliding device for a vehicle seat according to any one of the first to ninth aspects, wherein the gear unit is provided with a first worm tooth meshing with a nut portion. , A second screw meshing with the first screw gear
It is characterized by comprising a gear .

[Procedure amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction contents]

According to the tenth aspect of the present invention, the first aspect is provided.
In addition to the effects described in any one of (1) to (9), a portion meshing with the nut portion and a portion meshing with the first screw gear are separated, so that a convenient tooth size can be selected for each portion. .

[Procedure amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Change

[Correction contents]

A notch 12 is partially formed near the joint 8 of the upper rail 2.
2, a gear unit 13 having a predetermined length is rotatably held. The gear unit 13 is located in the cross section of the lower rail 4 by being held in the notch 12.

[Procedure amendment 15]

[Document name to be amended] Statement

[Correction target item name] 0043

[Correction method] Change

[Correction contents]

The gear unit 13 has a shape having first worm teeth 14 and a second screw gear 15.

[Procedure amendment 16]

[Document name to be amended] Statement

[Correction target item name] 0044

[Correction method] Change

[Correction contents]

The first worm tooth 14 is provided on the upper rail 2
In the groove 7. The first screw gear 16 provided in the gear box G for reduction meshes with the second screw gear 15. The first screw gear 16 is connected to the lower rail 4 through the opening 5.
And meshes with the second screw gear 15.

[Procedure amendment 17]

[Document name to be amended] Statement

[Correction target item name] 0045

[Correction method] Change

[Correction contents]

The gear box G is provided in a concave portion 17 formed on the lower surface of the seat 1, and the first screw gear 16 rotates about an orthogonal axis 18 extending in the left-right direction.
A small-diameter spur gear 19 that rotates on the same orthogonal axis 18 as the first screw gear 16 is further provided in the gear box G, and the small-diameter spur gear 19 meshes with another spur gear 20.

[Procedure amendment 18]

[Document name to be amended] Statement

[Correction target item name] 0046

[Correction method] Change

[Correction contents]

Since the first screw gear 16 rotating on the orthogonal shaft 18 is inserted into the lower rail 5 from the opening 5, the narrow width of the opening 5 can be maintained.

[Procedure amendment 19]

[Document name to be amended] Statement

[Correction target item name] 0051

[Correction method] Change

[Correction contents]

Since the first screw gear 16 rotates about the orthogonal axis 18 while the gear unit 13 rotates about the axis in the front-rear direction, it is parallel to the orthogonal axis 21 connecting the left and right structures. And the formation of the orthogonal shaft 21 is easy. One of the left and right gear units 13 has a drive gear unit 2 on which a shaft of a motor 23 is attached.
4 are engaged. The gear box G is the first screw tooth
Wheel 16, small-diameter spur gears 19 and 20, driving first screw gear 2
2. It is composed of a drive gear unit 24.

[Procedure amendment 20]

[Document name to be amended] Statement

[Correction target item name] 0052

[Correction method] Change

[Correction contents]

With the structure described above, the rotational force of the motor 23 is transmitted through various gears in the gear box G to the gear unit.
And the gear unit 13 is rotated. When the gear unit 13 rotates, the gear unit 1
3 engages with the groove 7 of the lower rail 4, the upper rail 2 slides back and forth with respect to the lower rail 4 together with the seat 1. Since the groove 7 is formed symmetrically,
Play of the upper rail 2 in the left-right direction is suppressed.

[Procedure amendment 21]

[Document name to be amended] Statement

[Correction target item name] 0053

[Correction method] Change

[Correction contents]

Since both the gear unit 13 and the groove 7 are provided in the lower rail 4, the gear unit 1
Dust and dust are hard to adhere to 3 etc. There is no possibility that the cover or the carpet of the seat 1 gets caught in the movable part.

[Procedure amendment 22]

[Document name to be amended] Statement

[Correction target item name] 0054

[Correction method] Change

[Correction contents]

The engagement between the gear unit 13 and the groove 7 causes the upper rail 2 and the lower rail 4 to slide back and forth when the motor 23 rotates (slide function), and to stop when the motor 23 stops. 2
The structure is such that the forward and backward movement is prevented (stopper function), so that both the slide function and the stopper function are reliable. Particularly, in this embodiment, the gear unit 13 has five teeth, and the five teeth are meshed with the five grooves 7 at the same time (only about 1.5 teeth are meshed with a normal spur gear). Even if an excessive load is applied to the seat 1 in the front-rear direction, the meshing state between the gear unit 13 and the groove 7 is not broken.

[Procedure amendment 23]

[Document name to be amended] Statement

[Correction target item name] 0056

[Correction method] Change

[Correction contents]

Therefore, even if the formation length of the groove 7 is increased for the purpose of making the sheet 1 longer, the assembling work of the apparatus does not become difficult. Further, even if the formation length of the groove 7 is extended, the predetermined length of the gear unit 13 can be kept as it is, so that it is easy to realize a long slide.

[Procedure amendment 24]

[Document name to be amended] Statement

[Correction target item name] 0057

[Correction method] Change

[Correction contents]

Further, in this embodiment, the gear box G and the motor 23 are pre-assembled on the seat 1 side, the lower rail 4, the upper rail 2 and the gear unit 13 are pre-assembled on the floor 3 side. The power slide device is formed at the stage when the power slide device is mounted.

[Procedure amendment 25]

[Document name to be amended] Statement

[Correction target item name] 0058

[Correction method] Change

[Correction contents]

That is, the lower end of the first screw gear 16 projects downward from the gear box G attached to the seat 1, and the cut-out portion 12 of the upper rail 2 is formed.
Inside, the gear unit 13 is exposed.

[Procedure amendment 26]

[Document name to be amended] Statement

[Correction target item name] 0059

[Correction method] Change

[Correction contents]

Therefore, in the final assembling work, the sheet 1
Is mounted on the upper rail 2 so that the
1 screw gear 16 and 2nd screw gear 15 of gear unit 13
Are engaged with each other to complete the power slide device.

[Procedure amendment 27]

[Document name to be amended] Statement

[Correction target item name] 0060

[Correction method] Change

[Correction contents]

FIG. 5 is a view showing a second embodiment of the present invention. In this embodiment, a rack member 25 as a “nut portion” is attached along the bottom surface portion 6 of the lower rail 26.
The wrap member 25 has a sectional shape as if a normal nut is divided into two, and has rack teeth on its inner surface that can mesh with the gear unit 13. The same locus in the longitudinal direction (parallel to the lower rail 4) is obtained. Therefore, even if the length of the rack member 25 is extended for a long slide, the gear unit is not required.
Always the same mesh with resulting from bets 13. Other configurations, functions, and effects are the same as those of the previous embodiment, and redundant description is omitted.

[Procedure amendment 28]

[Document name to be amended] Statement

[Correction target item name] 0061

[Correction method] Change

[Correction contents]

[0061]

According to the first aspect of the present invention, according to the present invention, since the nut portion along the longitudinal direction is integrally provided on the fixed rail, the nut portion is inevitably attached to the fixed rail. It is completely parallel, and the assembling work is easy.
Further, in order to increase the length of the seat, the gear unit can be easily realized simply by extending the length of the nut portion while keeping the predetermined length of the gear unit . Further, since the gear unit and the nut are meshed with each other, the number of teeth meshing with each other is larger than that of a simple flat gear, and the stopper function for preventing the sheet from moving forward and backward when the motor is stopped is high.

[Procedure amendment 29]

[Document name to be amended] Statement

[Correction target item name] 0062

[Correction method] Change

[Correction contents]

Further, since the gear unit and the nut portion are provided in the fixed rail, the sliding cross section below the seat (the cross section of the mechanism for sliding) is reduced, and
Dirt and dust hardly adhere to the gear unit and the like. There is no danger of the seat cover or carpet getting caught in the gear unit .

[Procedure amendment 30]

[Document name to be amended] Statement

[Correction target item name] 0063

[Correction method] Change

[Correction contents]

[0063] In addition, the first screw gear that rotates with orthogonal axes inserted in the fixed rail through the opening, the gear the first screw gear
The structure in which the rotational force of the motor is transmitted by meshing with the unit allows a narrow width of the opening to be maintained. Therefore, it is possible to prevent the heel of the high heel from entering the opening, and it is difficult for foreign matter, dust and the like to enter from the opening.

[Procedure amendment 31]

[Document name to be amended] Statement

[Correction target item name] 0064

[Correction method] Change

[Correction contents]

According to the second aspect of the present invention, the first screw teeth are provided.
Since the vehicle rotates about the orthogonal axis, the torque is easily transmitted from the reduction gear group rotating on the orthogonal axis.

[Procedure amendment 32]

[Document name to be amended] Statement

[Correction target item name] 0070

[Correction method] Change

[Correction contents]

According to the eighth aspect of the present invention, the gear unit
Not only the mounting of the bets is facilitated, by using the notch
The first screw gear can be meshed with the gear unit .

[Procedure amendment 33]

[Document name to be amended] Statement

[Correction target item name] 0072

[Correction method] Change

[Correction contents]

According to the tenth aspect of the present invention, the portion meshing with the nut portion and the portion meshing with the first screw gear are separated, so that a convenient tooth size can be selected for each portion.

[Procedure amendment 34]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view showing a power slide device for a vehicle seat according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a power slide device for an automobile seat.

FIG. 3 is a sectional view taken along the line SA-SA shown in FIG.

FIG. 4 is a perspective view showing a peripheral structure of a gear unit and a first screw gear .

FIG. 5 is a sectional view showing a second embodiment of the present invention and corresponding to FIG. 3;

[Description of Signs] 1 Seat 2 Upper rail (movable rail) 3 Floor 4 Lower rail (fixed rail) 5 Opening 6 Bottom part 7 Groove (nut part) 13 Gear unit 14 First worm tooth 15 Second screw gear 16 First screw gear 18 Orthogonal axis 21 Orthogonal axis (connection axis) 23 Motor 25 Rack member (nut part) G Gearbox as “reduction gear group” Y Front and rear direction X Left and right direction (Orthogonal direction)

Claims (10)

[Claims] 1. A pair of left and right fixed rails fixed to a floor and a pair of left and right movable rails fixed to a seat are respectively slidably movable back and forth, and the fixed rail has a cross-sectional shape having an opening in an upper surface portion. A nut portion along the longitudinal direction is integrally provided inside, and the movable rail is provided with a worm gear of a predetermined length that meshes with the nut portion inside the fixed rail, and the worm gear has an axis perpendicular to the longitudinal direction. A power sliding device for an automobile seat, wherein a worm wheel that rotates and is inserted into a fixed rail from an opening is engaged with the worm wheel, and a rotational force of a motor is transmitted from the worm wheel to a worm gear. 2. The power sliding device for a vehicle seat according to claim 1, wherein a rotational force is transmitted to the worm wheel from a group of reduction gears that rotate on an axis orthogonal to a longitudinal direction. Power slide device for automotive seats. 3. The power slide device for a vehicle seat according to claim 2, wherein the left and right reduction gear groups are interlocked by a connecting shaft. 4. The power slide device for an automobile seat according to claim 1, wherein the nut portion is formed along a longitudinal direction of a bottom portion of the fixed rail. A power slide device for an automobile seat, comprising: 5. The power slide device for a vehicle seat according to claim 4, wherein the grooves formed on the bottom surfaces of the left and right fixed rails are inclined in directions symmetric to each other. Power slide device for seats. 6. The power slide device for a vehicle seat according to claim 1, wherein the nut portion is a rack member along a longitudinal direction attached to a bottom portion of a fixed rail. A power slide device for a seat for an automobile, characterized in that: 7. The power slide device for a vehicle seat according to claim 1, wherein an upper surface of the fixed rail is flush with a surface of the floor. Power slide device for seats. 8. The power slide device for an automobile seat according to claim 1, wherein the movable rail is formed with a notch for holding a worm gear. Power slide device for automotive seats. 9. The power slide device for a vehicle seat according to claim 1, wherein the worm wheel, a reduction gear group, and a motor are previously assembled on a seat side, and a fixed rail is provided. A power slide device for an automobile seat, wherein the power slide device has a structure in which a movable rail, a worm gear, and a worm gear can be assembled to a floor in advance. 10. The power slide device for an automobile seat according to claim 1, wherein the worm gear is configured to engage a first worm tooth meshing with a nut portion and a worm wheel. A power slide device for a vehicle seat, comprising two worm teeth.