JPH10203209A - Seat slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce outside diameter and volume and increase a spring constant by few dampers by regulating elastic deformation of dampers made of elastic bodies which collide against nut bodies by a damper deformation regulating member, at the stroke end of a seat. SOLUTION: When a seat comes up to a stroke end due to forward movements or backward movements of lead screws 7, 8 as revolving force generating parts for each nut body 11, 12, dampers 17, 18, 19, 20 arranged side by side with stoppers 13, 14, 15, 16 collide against the nut bodies 11, 12 at the lead screws 7, 8. At the time, each damper 17, 18, 19, 20 regulates elastic deformation by each of damper deformation regulating members 21, 22, 23, 24. Thus, because a spring constant can be increased by few dampers 17, 18, 19, 20 which are small in outside diameter and volume, damper characteristics which are let to lie idle can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet slide device for automatically sliding a sheet.

[0002]

2. Description of the Related Art When a power supply in a forward direction is connected to a sheet motor, a seat slide device for automatically sliding a sheet is rotated by a forward rotation of an armature provided in the sheet motor, so that a lead screw rotates forward. The lead screw moves toward one side with respect to the nut body meshed with the lead screw, and the sheet retreats. On the other hand, when a power supply in the opposite direction is connected to the seat motor, the armature provided in the seat motor rotates in the reverse direction, so that the lead screw rotates in the reverse direction, and the lead screw engages with the nut body meshed with the lead screw. Moves toward the other side, and the sheet advances.

In such a sheet slide device, stoppers corresponding to the stroke of the sheet are attached to both ends of the lead screw, and rubber dampers are provided on the nut body side of these stoppers. Also, a rubber damper was built into the nut body. When the sheet reaches the stroke end and the stopper collides with the nut body, the damper on the lead screw and the damper on the nut body side cushion the impact so that no mechanical noise is generated. .

[0004]

In the seat slide apparatus described above, dampers are attached to both ends of the lead screw, respectively, and dampers are incorporated in the nut body in order to improve damper characteristics. As a result, the number of dampers is increased and workability during assembly is not good, and the dampers are made of expensive materials such as urethane rubber, which is disadvantageous in cost.

The damper is elastically deformed outwardly each time the stopper collides with the nut body. If the damper is greatly elastically deformed outwardly, a rail or the like movably mounts the seat on the vehicle body. May come into contact with To avoid this, if the outer diameter of the damper is reduced,
Since the pressure receiving area of the damper is reduced, the damper is excessively deformed and cannot sufficiently absorb the impact, and if the damper is crushed too much in the axial direction of the lead screw, the stroke of the sheet may be shifted. There was a problem.

[0006] In the high-load seat slide device having a large weight of the seat, it is difficult to increase the outer diameter of the damper for the above-mentioned reason, and there is a concern about durability.

[0007]

SUMMARY OF THE INVENTION A seat slide device according to the present invention has a small outer diameter and a small volume and a small or large number of dampers to increase or decrease the spring constant by regulating the rate at which the dampers elastically deform. It is another object of the present invention to provide a seat slide device that can perform the above operation and has sufficient durability even for a high load.

[0008]

Configuration of the Invention

[0009]

In a seat slide device according to a first aspect of the present invention, a lower rail fixed to a vehicle body and a movably mounted along the lower rail,
Seat motor equipped with an upper rail fixed to the seat, an armature that rotates forward by connecting the power supply in the forward direction and rotates in the reverse direction by connecting the power supply in the reverse direction, a nut body fixed to the lower rail, and fixed to the upper rail The armature of the seat motor rotates forward to generate a rotational force in the forward direction to move forward with respect to the nut body, and the armature of the seat motor rotates in the reverse direction to rotate the nut in the reverse direction to rotate the nut. A rotating force generating unit that moves backward with respect to the body, a damper made of an elastic body that collides with a nut body at a stroke end of the seat, and a damper deformation amount regulating member that can regulate an elastic deformation amount of the damper; It is characterized by doing.

In the seat slide device according to a second aspect of the present invention, a lower rail fixed to the vehicle body, an upper rail movably mounted along the lower rail and fixed to the seat, and a power supply in the forward direction are connected. A seat motor with an armature that rotates in the forward direction and rotates in the reverse direction when a power supply is connected in the reverse direction, a nut body fixed to the lower rail, and meshes with the nut body, and rotates forward or backward by the rotation of the armature of the seat motor. A lead screw that moves the upper rail to the forward or backward side of the seat by moving forward and backward with respect to the nut body, a stopper disposed on the lead screw according to the seat stroke, and a nut arranged in parallel with the stopper. An elastic damper that collides with the body, and a lead screw It is characterized in that it has a configuration in the radial direction of the over and a damper deformation amount regulating member capable restricting the elastic deformation of the damper.

In the seat slide device according to a third aspect of the present invention, a damper holding portion capable of holding the damper is formed inside the damper deformation amount regulating member, and the damper deformation amount regulating member is provided in the axial direction of the lead screw. , The length of the damper holding portion in the radial direction of the lead screw can be changed, and the length of the damper holding portion in the radial direction of the lead screw cannot be changed.

In the seat slide device according to a fourth aspect of the present invention, the damper deformation regulating member is provided as a pair on the nut body side of the damper and the stopper side of the damper along the axial direction of the lead screw. It is characterized by doing.

In the seat slide device according to a fifth aspect of the present invention, the damper deformation regulating member is formed with a nut body side collision portion that can collide with the nut body and a stopper side collision portion that can collide with the stopper. It is characterized by having a configuration that is

In the seat slide device according to a sixth aspect of the present invention, a concave portion is formed on the damper side of the stopper so as to be inclined in the axial direction of the lead screw.
The stopper-side collision portion of the damper deformation regulating member has a configuration in which a tapered plate portion that is accommodated in the recess of the stopper and that can increase the length of the damper holding portion in the axial direction of the lead screw is formed. It is characterized by:

According to a seventh aspect of the present invention, in the seat slide device, the damper is formed to have a polygonal shape and a lead screw insertion portion through which a lead screw can be inserted. .

[0016]

In the seat slide device according to the first aspect of the present invention, when the rotational force generating portion moves forward or backward with respect to the nut body, when the seat reaches the stroke end, the damper moves to the nut body. collide. At this time, the elastic deformation of the damper is regulated by the damper deformation regulating member. Therefore, the damper elastically deforms within a range regulated by the damper deformation regulating member.

In the seat slide device according to the second aspect of the present invention, when the sheet reaches the stroke end, the damper arranged in parallel with the stopper on the lead screw collides with the nut body. At this time, the elastic deformation of the damper in the radial direction of the lead screw is regulated by the damper deformation amount regulating member disposed outside. Therefore, in addition to the effect of the first aspect, the damper does not increase the amount of elastic deformation in the outward direction.

In the seat slide device according to the third aspect of the present invention, when the sheet reaches the stroke end and the damper collides with the nut body, the damper holding portion of the damper deformation amount regulating member moves in the axial direction of the lead screw. By changing the length, the damper is allowed to elastically deform in the axial direction of the lead screw, whereas, by preventing the change in length in the radial direction of the lead screw, the damper is connected to the lead screw. To prevent elastic deformation in the radial direction. Therefore, in addition to the function of claim 2, the damper is elastically deformed in the axial direction of the lead screw, but the amount of elastic deformation in the outward direction is suppressed, and the outer diameter does not increase.

In the seat slide device according to a fourth aspect of the present invention, when the sheet reaches the stroke end, the damper deformation regulating member on the nut body side of the damper collides with the nut body and the damper deformation amount on the stopper side of the damper. The regulating member collides with the stopper. Therefore, in addition to the operation of the third aspect, the damper is uniformly elastically deformed while being sandwiched between the stopper side and the nut body side on both sides in the axial direction of the lead screw.

In the seat slide device according to a fifth aspect of the present invention, when the sheet reaches the stroke end, the nut-body-side collision portion provided on the damper-deformation-amount regulating member on the nut body side of the damper collides with the nut body, and The stopper-side collision portion provided on the stopper-side damper deformation amount regulating member collides with the stopper. Therefore, in addition to the operation of claim 4, the elastic deformation of the damper is allowed in a direction in which the length of the lead screw in the axial direction decreases in the direction in which the length of the lead screw decreases in the axial direction by bringing the nut body side collision portion closer to the stopper side collision portion. The elastic deformation of the damper is suppressed so that the length of the lead screw in the radial direction is not increased.

In the seat slide device according to a sixth aspect of the present invention, when the sheet reaches the stroke end, the nut-body-side collision portion provided in the damper deformation-amount regulating member on the nut body side of the damper collides with the nut body, and The stopper-side collision portion provided on the stopper-side damper deformation amount regulating member collides with the stopper. At this time, the length of the damper holding portion in the axial direction of the lead screw is increased by the fact that the tapered plate portion provided on the damper deformation amount regulating member on the stopper side of the damper is accommodated in the recess of the stopper. Therefore, the damper is elastically deformed more in the axial direction of the lead screw, and the amount of elastic deformation in the radial direction of the lead screw is reduced. Therefore, Claim 5
In addition to the operation described above, even a device having a large weight and a high load can be used without changing the outer diameter of the damper.

In the seat slide device according to a seventh aspect of the present invention, when the sheet reaches the stroke end, the damper arranged in parallel with the stopper on the lead screw collides with the nut body. At this time, the elastic deformation of the damper is restricted in the radial direction of the lead screw by the damper deformation amount regulating member arranged on the outside, and at the same time, the elastic deformation of the lead screw insertion portion is allowed in the gap between the lead screw and the lead screw. You. Therefore, in addition to the function of claim 2, the damper also elastically deforms on the inner peripheral side where the lead screw is inserted, and the amount of elastic deformation in the outward direction does not increase.

[0023]

1 to 4 show a first embodiment of a seat slide device according to the present invention.

The illustrated seat slide apparatus 1 mainly includes a seat motor 2, a right lower rail 3, a left lower rail 4, a right upper rail 5, a left upper rail 6, a right lead screw 7, a left lead screw 8, a right lead screw 8. Gear box 9 and left gear box 1
0, right nut body 11, left nut body 12, right first stopper 13, right second stopper 14, left first stopper 15, left second stopper 16, right first , A second damper 18 on the right side, a first damper 19 on the left side, a second damper 20 on the left side, a first damper deformation regulating member 21 on the right side, and a second damper deformation regulating member on the right side. 22, a first damper deformation amount regulating member 23 on the left side, and a second damper deformation amount regulating member 24 on the left side.

The seat motor 2 is provided on the left gear box 1.
The armature 2b, which is attached to the 0 side and is accommodated in the motor case 2a, rotates forward by the connection of the power supply on the positive side, and reversely rotates by the connection of the power supply on the opposite side. An armature shaft 2b1 provided on the armature 2b has a cable 25 at one end of the motor case 2a.
Is connected to the first worm gear 26, which will be described later, in the right gear box 9 via the cable 25, while in the left gear box 10 at the other end of the motor case 2a, A second worm gear 27 to be described later is connected.

The right lead screw 7 extends along the right upper rail 5 and has a right nut 11 screwed into a male screw 7a1 formed at the center of the shaft body 7a. The other end is rotatably supported at the end of the upper rail 5 on the right side.

The right lead screw 7 has a shaft body 7
The right first stopper 13 is fixed to one end of the shaft body 7a, and the right second stopper 14 is fixed to the other end of the shaft body 7a.

The first stopper 13 on the right side is formed in an annular shape, and as shown in FIG.
The stop ring 28 is locked. The first stop ring 28 is fitted in a ring stopper groove 7a2 formed at one end of the shaft main body 7a of the first lead screw 7, so that the first stopper 13 on the right side in FIG. It is immovable in the left direction and attached to the right lead screw 7. The first stopper 13 on the right side sets the last position when the sheet moves backward according to the stroke of the sheet (not shown).

The right second stopper 14 is connected to the right first stopper 14.
The stopper 13 is formed in the same annular shape as the stopper 13, and an inner peripheral portion thereof is engaged with a second stop ring (not shown). Since the second stop ring is fitted in a ring stopper groove (not shown) formed at the other end of the shaft main body 7a of the right lead screw 7, the second stopper 14 on the right side in FIG. It is immovable in the right direction and is attached to the right lead screw 7. The second stopper 14 on the right side sets the foremost position when the sheet moves forward according to the stroke of the sheet (not shown).

On the right lead screw 7, a right first damper 17 is disposed on the male screw 7a1 side of the right first stopper 13, and a right second damper 17 is disposed on the male screw 7a1 side of the right second stopper 14. Are disposed.

As shown in FIG. 4, the first damper 17 on the right side is provided with a first damper body 17a made of rubber and formed in a substantially cylindrical shape. A first lead screw insertion portion 17b is formed on the inner peripheral side of 17a. The first lead screw insertion portion 17b has a square hole shape (polygonal shape), and the shaft main body 7a of the right lead screw 7 is inserted into the first lead screw insertion portion 17b. First on the right
As shown in FIG. 2, the damper 17 has a length L1 along the axial direction of the right lead screw 7 and an outer diameter D1 in the radial direction of the right lead screw 7. Then, the first damper 17 on the right
On the inner peripheral side of the lead screw insertion portion 17b, four elastic deformation absorbing portions 50 are formed between the lead screw insertion portion 17b and the shaft main body 7a of the right lead screw 7, respectively.

The first lead screw insertion portion 17b of the right first damper 17 is moved by the right first damper deformation amount regulating member 21 described later.
When the right lead screw 7 is elastically deformed in the axial direction, the right lead screw 7 is elastically deformed toward the inner peripheral side so as to reduce the gap between the right lead screw 7 and the shaft main body 7a. Has a function of suppressing the first damper 17 from elastically deforming (swelling) in the radial direction of the right lead screw 7.

Outside the right first damper 17, a right first damper deformation amount regulating member 21 is disposed.
The right first damper deformation amount regulating member 21 is
First stopper side plate 29 arranged on the side of the stopper 13
And a first nut body side plate 30 arranged on the right nut body 11 side, which will be described later, meshed with the male screw 7a1 of the right lead screw 7.

The first stopper side plate 29 has a disc-shaped regulating member body 29b having a lead screw insertion hole 29a formed in the inner periphery thereof, and a first stopper member 29b on the right side from the outer peripheral edge of the regulating member body 29b. A damper pressing portion 29c that protrudes in a ring shape so as to cover the outer edge of the damper 17 is provided integrally. The restricting member main body 29b of the first stopper side plate 29 has a first stopper 13 in contact with the first stopper 13 on the right side.
Has a stopper side collision portion 29b1.

The first nut body side plate 30 is formed in the same shape as the first stopper side plate 29, and is symmetrically arranged in a pair with the first stopper side plate 29 about the right first damper 17. I have. The first nut body side plate 30 has a disc-shaped regulating member main body 30b having a lead screw insertion hole 30a formed in an inner peripheral portion thereof;
A damper pressing portion 30c that protrudes in a ring shape so as to cover the outer edge of the right first damper 17 from the outer peripheral edge of Ob is provided integrally. The restricting member main body 30b of the first nut body side plate 30 has a first nut body side collision portion 30b1 with which the right nut body 11 described below contacts. The first stopper side plate 29 and the first nut body side plate 30 are both formed of a metal plate having a small thickness.

The right first damper deformation regulating member 21 includes a first stopper side plate 29 and a first nut body side plate 30.
A damper holding portion 31 is formed between the two. The damper holding portion 31 has a length L2 substantially the same as the length L1 of the right first damper 17 in the axial direction of the right lead screw 7. In the radial direction of the right lead screw 7, the right first damper 17 has the same inner diameter D2 as the outer diameter D1 of the right first damper 17. Is housed.

The right first damper deformation regulating member 21 includes a length L3 of the damper pressing portion 29c of the first stopper side plate 29 along the axial direction of the right lead screw 7 and a first nut. Damper holding part 30 of body side plate 30
c is smaller than the length L1 of the first damper 17 on the right side, so that the gap L
5

The right first damper deformation regulating member 21
The right first damper 17 is held in the damper holding portion 31, and the regulating member main body 29 b of the first stopper side plate 29 is
The first stopper side collision portion 29b1 of the first
When the right lead screw 7 is moved to the last position of the sheet while being engaged with the right nut body 11 described later, the right lead screw 7 contacts the regulating member main body 30b of the first nut body side plate 30. The first nut body side collision portion 30b1 collides with the right nut body 11. At this time, the first damper deformation amount regulating member 21 on the right side moves the first nut body side plate 30 toward the first stopper side plate 29 in the axial direction of the right lead screw 7 so as to reduce the gap dimension L5. The volume of the damper holding portion 31 is reduced so that the right first damper 17 is
To allow elastic deformation in the axial direction. At this time, since the first damper 17 on the right side is held by the first stopper side plate 29 and the first nut body side plate 30 on both sides along the axial direction of the right lead screw 7, it is uniformly elastic. Deform.

At the same time, the damper holding portion 30c of the first nut body side plate 30 and the damper holding portion 29c of the first stopper side plate 29 are disposed outside the right first damper 17, respectively. The first damper deformation amount regulating member 21 prevents the right first damper 17 from being elastically deformed in the radial direction of the right lead screw 7, so that the right first damper 17 increases outwardly. The first damper 17 on the right side has a function of absorbing the impact when it collides with the right nut body 11 while preventing elastic deformation. As a result, the right first damper 17 has a radial dimension of the right lead screw 7 formed by the damper pressing portion 30c of the first nut body side plate 30 and the damper pressing portion 29c of the first stopper side plate 29. It does not become large but is elastically deformed by the damper characteristic having a large spring constant.

As shown in FIG. 4, the second damper 18 on the right side is provided with a second damper body 18a made of rubber as a substantially cylindrical shape. A second lead screw insertion portion 18b is formed on the inner peripheral side of 18a. The second lead screw insertion portion 18b has a square hole shape (polygonal shape), and the shaft main body 7a of the right lead screw 7 is inserted into the second lead screw insertion portion 18b. Second on the right
Since the damper 18 is formed in the same shape as the first damper 17 on the right side, it has a length dimension L1 along the axial direction of the lead screw 7 on the right side as shown in FIG. It has an outer diameter dimension D1 in the radial direction of the right lead screw 7. Then, the right second damper 18
On the inner peripheral side of the second lead screw insertion portion 18b,
4 between the shaft body 7a of the right lead screw 7
Elastic deformation absorbing portions 50 at respective locations are formed.

The second lead screw insertion portion 18b of the right second damper 18 is controlled by the right second damper deformation amount regulating member 22 described later.
When the right lead screw 7 is elastically deformed in the axial direction, the right lead screw 7 is elastically deformed toward the inner peripheral side so as to reduce the gap between the right lead screw 7 and the shaft main body 7a. The second damper 18 has a function of suppressing the elastic deformation (swelling) of the right lead screw 7 in the radial direction.

Outside the right second damper 18, a right second damper deformation regulating member 22 is disposed.
The right second damper deformation amount regulating member 22 is
The second stopper side plate 32 arranged on the side of the stopper 14
And a second nut body side plate 33 arranged on the right nut body 11 side, which will be described later, meshed with the male screw 7a1 of the right lead screw 7.

The second stopper side plate 32 has a disc-shaped regulating member body 32b having a lead screw insertion hole 32a formed in the inner periphery thereof, and a second stopper member 32b on the right side from the outer peripheral edge of the regulating member body 32b. A damper pressing portion 32c that protrudes in a ring shape so as to cover the outer edge of the damper 18 is provided integrally. The restricting member main body 32b of the second stopper side plate 32 has a second stopper 14 in contact with the right second stopper 14.
Has a stopper side collision portion 32b1.

The second nut body side plate 33 is formed in the same shape as the second stopper side plate 32, and is symmetrically arranged in a pair with the second stopper side plate 32 around the right second damper 18. I have. The second nut body side plate 33 has a disc-shaped regulating member main body 33b having a lead screw insertion hole 33a formed in an inner peripheral portion thereof.
A damper pressing portion 33c, which protrudes in a ring shape so as to cover the outer edge of the right second damper 18 from the outer peripheral edge of 3b, is provided integrally. The restricting member main body 33b of the second nut body side plate 33 has a second nut body side collision portion 33b1 with which the right nut body 11 described below contacts. Each of the second stopper side plate 32 and the second nut body side plate 33 is formed of a metal plate having a small thickness.

A second stopper side plate 32 and a second nut body side plate 33 are provided on the right second damper deformation amount regulating member 22.
A damper holding portion 34 is formed between the two, and the damper holding portion 34 has a length L2 substantially equal to the length L1 of the right second damper 18 in the axial direction of the right lead screw 7. In the radial direction of the right lead screw 7, the right second damper 18 has the same inner diameter D 2 as the outer diameter D 1 of the right second damper 18. Is housed.

The right second damper deformation regulating member 22 includes a length L3 of the damper pressing portion 32c of the second stopper side plate 32 along the axial direction of the right lead screw 7 and a second nut. Damper holding portion 33 of body side plate 33
c is smaller than the length L1 of the second damper 18 on the right side, so the gap L between the two is smaller.
5

The right second damper deformation regulating member 22
The right side second damper 18 is held in the damper holding portion 34, and the regulating member main body 32b of the second stopper side plate 32
The second stopper side collision portion 32b1 included in the
When the right lead screw 7 is moved to the last position of the seat while being engaged with the right nut body 11 described later, the right lead screw 7 is in contact with the regulating member main body 33b of the second nut body side plate 33. The second nut body side collision portion 33b1 collides with the right nut body 11. At this time, the second right damper deformation regulating member 22 moves the second nut body side plate 33 toward the second stopper side plate 32 in the axial direction of the right lead screw 7 so as to reduce the gap dimension L5. The volume of the damper holding portion 34 is reduced so that the right second damper 18 is
To allow elastic deformation in the axial direction. At this time, since the right second damper 18 is held by the second stopper side plate 32 and the second nut body side plate 33 on both sides along the axial direction of the right lead screw 7, it is uniformly elastic. Deform.

At the same time, the damper holding portion 33c of the second nut body side plate 33 and the damper holding portion 32c of the second stopper side plate 32 are disposed outside the right second damper 18, respectively. The second damper deformation amount regulating member 22 prevents the right second damper 18 from being elastically deformed in the radial direction of the right lead screw 7, so that the right second damper 18 increases outwardly. The second damper 18 on the right side has a function of absorbing the impact when it collides with the right nut body 11 while preventing elastic deformation. Thereby, the right second damper 18 is connected to the damper pressing portion 33 c of the second nut body side plate 33.
Due to the damper pressing portion 32c of the second stopper side plate 32, the dimension of the right lead screw 7 in the radial direction is not increased, and the right lead screw 7 is elastically deformed with damped damper characteristics.

As shown in FIG. 2, a helical gear mounting shaft 7b having a diameter smaller than that of the male screw 7a1 is formed near one end of the shaft main body 7a of the right lead screw 7, and the helical gear mounting shaft is formed. A detent portion 7b1 having an oval cross section is formed near the tip of 7b. At one end of the shaft main body 7a, a screw portion 7c having a smaller diameter than that of the helical gear mounting shaft portion 7b is formed.

The right lead screw 7 is provided in the right gear box 9 with one flat washer 35 disposed on the base end side of the helical gear mounting shaft 7b and the other flat washer disposed on the distal end side. 36, the first helical gear 37 is stopped and coupled at the detent portion 7b1,
One flat washer 35, the first helical gear 37, and the other flat washer 36 mounted on the helical gear mounting shaft 7b.
The first helical gear 37 is fixed to the right lead screw 7 by the first lead screw nut 38 being screwed outside.

The right gear box 9 is disposed below the right upper rail 5, and an upper portion of the right upper rail 5 is fixed to a seat (not shown).

When a forward power supply is connected to the armature 2b of the seat motor 2, the right lead screw 7 is meshed with the first worm gear 26 because the armature shaft 2b1 of the seat motor 2 rotates in the forward direction. The first helical gear 37 rotates in the forward direction, and thus rotates in the forward direction. On the other hand, when the power supply in the opposite direction is connected to the armature 2b of the seat motor 2, the armature shaft 2b1 of the seat motor 2 rotates in the opposite direction. The meshed first helical gear 37 rotates in the opposite direction, and thus rotates in the opposite direction.

On the other hand, the left lead screw 8 extends along the left upper rail 6 and has a male nut 8a1 formed at the center of the shaft main body 8a. The other end is rotatably supported by the end of the upper rail 6 on the left side.

The left lead screw 8 has a shaft body 8
The first stopper 15 on the left side is fixed to one end of the shaft body 8a, and the second stopper 16 on the left side is fixed to the other end of the shaft body 8a.

The left first stopper 15 is connected to the right first stopper 15.
The stopper 13 is formed in the same annular shape as that of the stopper 13, and the inner peripheral portion thereof is engaged with the third stop ring 39 as described below with reference to FIG. 2. Since the third stop ring 39 is fitted in the ring stopper groove 8a2 formed at one end of the shaft main body 8a of the left lead screw 8, the first stop 15 on the left side in FIG. It is attached to the left lead screw 8 so that it cannot move in the direction. The first stopper 15 on the left side sets the last position when the sheet moves backward according to the stroke of the sheet (not shown).

The second stopper 16 on the left side is connected to the first stopper 16 on the left side.
The stopper 15 is formed in the same annular shape as the stopper 15, and an inner peripheral portion thereof is engaged with a fourth stop ring (not shown). The fourth stop ring is fitted in a ring stopper groove (not shown) formed at the other end of the shaft main body 8a of the left lead screw 8, so that the second stopper 16 on the left side in FIG. It is immovable in the left direction and attached to the left lead screw 8. The second stopper 16 on the left side sets the foremost position when the sheet moves forward according to the stroke of the sheet (not shown).

The left lead screw 8 is provided with a left first damper 19 on the male screw 8a1 side of the left first stopper 15, and the left second damper 19 is provided on the male screw 8a1 side of the second stopper 16 on the left. Are disposed.

As shown in FIG. 4, the first damper 19 on the left side is provided with a first damper body 19a made of rubber and formed in a substantially cylindrical shape. A first lead screw insertion portion 19b is formed on the inner peripheral side of 19a. The first lead screw insertion portion 19b has a square hole shape (polygonal shape), and the shaft main body 8a of the left lead screw 8 is inserted into the first lead screw insertion portion 19b. First on the left
As shown in FIG. 2, the damper 19 has a length L1 along the axial direction of the left lead screw 7 and an outer diameter D1 in the radial direction of the left lead screw 7. Then, the first damper 19 on the left side
On the inner peripheral side of the lead screw insertion portion 19b, four elastic deformation absorbing portions 50 are formed between the lead screw insertion portion 19b and the shaft main body 8a of the left lead screw 8, respectively.

The first lead screw insertion portion 19b of the first damper 19 on the left side is moved by the first damper deformation regulating member 23 on the left side to be described later.
When the left lead screw 8 is elastically deformed in the axial direction, the left lead screw 8 is elastically deformed toward the inner peripheral side so as to reduce the gap between the left lead screw 8 and the shaft main body 8a. Has a function of suppressing the first damper 19 from elastically deforming (swelling) in the radial direction of the left lead screw 8.

Outside the left first damper 19, a left first damper deformation amount regulating member 23 is disposed.
The first damper deformation regulating member 23 on the left side is
First stopper side plate 40 arranged on the side of the stopper 15
And a first nut body side plate 41 arranged on the left nut body 12 side, which will be described later, meshed with the male screw 8a1 of the left lead screw 8.

The first stopper side plate 40 has a disc-shaped regulating member main body 40b having a lead screw insertion hole 40a formed in the inner peripheral portion, and a first left side from the outer peripheral edge of the regulating member main body 40b. A damper holding portion 40c that protrudes in a ring shape so as to cover the outer edge of the damper 19 is provided integrally. The first stopper 15 on the left side contacts the first stopper 15 on the left side of the regulating member main body 40 b of the first stopper side plate 40.
Has a stopper side collision portion 40b1.

The first nut body side plate 41 is formed in the same shape as the first stopper side plate 40, and is symmetrically arranged in a pair with the first stopper side plate 40 with the left first damper 19 as a center. I have. The first nut body side plate 41 has a disc-shaped regulating member main body 41b having a lead screw insertion hole 41a formed on an inner peripheral portion thereof.
A damper pressing portion 41c, which protrudes in a ring shape and covers the outer edge of the first damper 19 on the left side from the outer peripheral edge of 1b, is provided integrally. The restricting member main body 41b of the first nut body side plate 41 has a first nut body side collision portion 41b1 with which the left nut body 12 described below contacts. The first stopper side plate 40 and the first nut body side plate 41 are both formed of a metal plate having a small thickness.

The left first damper deformation amount regulating member 23 has a first stopper side plate 40 and a first nut body side plate 41.
A damper holding portion 42 is formed between the two. The damper holding portion 42 has a length L2 substantially equal to the length L1 of the left first damper 19 in the axial direction of the left lead screw 8. And has an inner diameter D2 substantially the same as the outer diameter D1 of the first damper 19 on the left in the radial direction of the lead screw 8 on the left, so that the first damper 19 on the left Is housed.

The left first damper deformation regulating member 23 has a length L3 of the damper pressing portion 40c of the first stopper side plate 40 along the axial direction of the left lead screw 8 and a first nut. Damper holding portion 41 of body side plate 41
c is smaller than the length L1 of the first damper 19 on the left side.
5

The left first damper deformation regulating member 23
The first damper 19 on the left side is held in the damper holding portion 42, and the regulating member main body 40b of the first stopper side plate 40
1st stopper side collision part 40b1 which
When the left lead screw 8 is moved to the last position of the sheet while being engaged with a left nut body 12 described later, the left lead screw 8 contacts the regulating member main body 41b of the first nut body side plate 41. The first nut-body-side collision portion 41b1 collides with the left nut body 12. At this time, the first damper deformation amount regulating member 23 on the left side moves the first nut body side plate 41 closer to the first stopper side plate 40 in the axial direction of the left lead screw 8 so as to reduce the gap dimension L5. The volume of the damper holding portion 42 is reduced so that the first damper 19 on the left side
To allow elastic deformation in the axial direction. At this time, since the first damper 19 on the left side is held by the first stopper side plate 40 and the first nut body side plate 41 on both sides along the axial direction of the left lead screw 8, it is uniformly elastic. Deform.

At the same time, the damper holding portion 41c of the first nut body side plate 41 and the damper holding portion 40c of the first stopper side plate 40 are disposed outside the first damper 19 on the left side. The first damper deformation amount regulating member 23 prevents the left first damper 19 from being elastically deformed in the radial direction of the left lead screw 8, so that the left first damper 19 becomes larger outwardly. The first damper 19 on the left side has a function of absorbing the impact of the collision with the nut body 12 on the left side while preventing elastic deformation. Thereby, the first damper 19 on the left side is connected to the damper pressing portion 41c of the first nut body side plate 41.
Due to the damper pressing portion 40c of the first stopper side plate 40, the dimension of the left lead screw 8 in the radial direction is not increased, and the left lead screw 8 is elastically deformed with a damped damper characteristic.

As shown in FIG. 4, the second damper 20 on the left side is provided with a second damper main body 20a formed of rubber as a substantially cylindrical shape. A second lead screw insertion portion 20b is formed on the inner peripheral side of 20a. The second lead screw insertion portion 20b has a square hole shape (polygonal shape), and the shaft main body 8a of the left lead screw 8 is inserted into the second lead screw insertion portion 20b. Second on the left
As shown in FIG. 2, the damper 20 has a length L1 along the axial direction of the left lead screw 8 and an outer diameter D1 in the radial direction of the left lead screw 8. Then, the second damper 20 on the left
On the inner peripheral side of the lead screw insertion portion 20b, four elastic deformation absorbing portions 50 are respectively formed between the lead screw insertion portion 20b and the shaft main body 8a of the left lead screw 8.

The second lead screw insertion portion 20b of the second damper 20 on the left side is moved by a second damper deformation regulating member 24 on the left side to be described later.
When the left lead screw 8 is elastically deformed in the axial direction, the left lead screw 8 is elastically deformed toward the inner peripheral side so as to reduce the gap between the left lead screw 8 and the shaft main body 8a. The second damper 20 has a function of suppressing elastic deformation (swelling) in the radial direction of the left lead screw 8.

Outside the second damper 20 on the left side, a second damper deformation regulating member 24 on the left side is arranged.
The left second damper deformation amount regulating member 24 is
The second stopper side plate 43 arranged on the side of the stopper 16
And a second nut body side plate 44 arranged on the left nut body 12 side, which will be described later, meshed with the male screw 8a1 of the left lead screw 8.

The second stopper side plate 43 has a disc-shaped regulating member main body 43b having a lead screw insertion hole 43a formed in the inner peripheral portion, and a second left side from the outer peripheral edge of the regulating member main body 43b. A damper pressing portion 43c that protrudes in a ring shape so as to cover the outer edge of the damper 20 is provided integrally. The restricting member main body 43b of the second stopper side plate 43 has a second stopper 16 in contact with the second stopper 16 on the left side.
Has a stopper side collision portion 43b1.

The second nut body side plate 44 is formed in the same shape as the second stopper side plate 43, and is symmetrically arranged in a pair with the second stopper side plate 43 about the left second damper 20. I have. The second nut body side plate 44 has a disc-shaped regulating member main body 44b having a lead screw insertion hole 44a formed in an inner peripheral portion thereof.
A damper pressing portion 44c, which protrudes in a ring shape and covers the outer edge of the second damper 20 on the left side from the outer peripheral edge of 4b, is provided integrally. The restricting member main body 44b of the second nut body side plate 44 has a second nut body side collision portion 44b1 with which the left nut body 12 described below contacts. Each of the second stopper side plate 43 and the second nut body side plate 44 is formed of a metal plate having a small thickness.

A second stopper side plate 43 and a second nut body side plate 44 are provided on the left second damper deformation amount regulating member 24.
A damper holding portion 45 is formed between the two. The damper holding portion 45 has a length L2 substantially equal to the length L1 of the left second damper 20 in the axial direction of the left lead screw 8. And has an inner diameter D2 substantially the same as the outer diameter D1 of the left second damper 20 in the radial direction of the left lead screw 8, so that the left second damper 20 is provided in the damper holding portion 45. Is housed.

The left second damper deformation amount regulating member 24 is provided with a length L3 of the damper pressing portion 43c of the second stopper side plate 43 along the axial direction of the left lead screw 8 and a second nut. Damper holding portion 44 of body side plate 44
c is smaller than the length L1 of the second damper 20 on the left side.
5

The left second damper deformation amount regulating member 24
The restriction member main body 43b of the second stopper side plate 43 holds the second damper 20 on the left side in the damper holding portion 45.
The second stopper side collision portion 43b1 of the left side
When the left lead screw 8 is moved to the last position of the seat while being engaged with the left nut body 12 described later, the left lead screw 8 contacts the regulating member main body 44b of the second nut body side plate 44. The second nut body side collision portion 44b1 collides with the left nut body 12. At this time, the second damper deformation amount regulating member 24 on the left side moves the second nut body side plate 44 toward the second stopper side plate 43 in the axial direction of the left lead screw 8 so as to reduce the gap dimension L5. The volume of the damper holding portion 45 is reduced, and the second damper 20 on the left side is connected to the lead screw 8 on the left side.
To allow elastic deformation in the axial direction. At this time, since the second damper 20 on the left side is held by the second stopper side plate 43 and the second nut body side plate 44 on both sides along the axial direction of the left lead screw 8, it is uniformly elastic. Deform.

At the same time, since the damper holding portion 44c of the second nut body side plate 44 and the damper holding portion 43c of the second stopper side plate 43 are arranged outside the left second damper 20, respectively, The second damper deformation regulating member 24 prevents the left second damper 20 from being elastically deformed in the radial direction of the left lead screw 8, so that the left second damper 20 becomes larger outwardly. The second damper 20 on the left side has a function of absorbing an impact at the time of colliding with the left nut body 12 while preventing elastic deformation. Thereby, the second damper 20 on the left side is connected to the damper pressing portion 44c of the second nut body side plate 44.
With the damper pressing portion 43c of the second stopper side plate 43, the dimension of the left lead screw 8 in the radial direction is not increased, and the left lead screw 8 is elastically deformed with a large spring constant damper characteristic.

As shown in FIG. 2, a helical gear mounting shaft 8b having a diameter smaller than that of the male screw 8a1 is formed near one end of the shaft main body 8a of the left lead screw 8, and the helical gear mounting shaft is formed. A detent portion 8b1 having an oval cross section is formed near the front end of 8b. At one end of the shaft main body 8a, a screw portion 8c having a smaller diameter than that of the helical gear mounting shaft portion 8b is formed.

The left lead screw 8 is provided in the left gear box 10 with one flat washer 46 disposed on the proximal end side of the helical gear mounting shaft 8b and the other flat washer disposed on the distal end side. 47, the second helical gear 48 is prevented from rotating at the detent portion 8b1 and is connected thereto. The flat washer 46 on one side, the second helical gear 48, and the flat face on the other side mounted on the helical gear mounting shaft 8b. The first helical gear 48 is fixed to the left lead screw 8 by screwing the second lead screw nut 49 outside the washer 47.

The left gear box 10 is arranged below the left upper rail 6, and the upper part of the left upper rail 6 is fixed to a seat (not shown).

When the forward power supply is connected to the armature 2b of the seat motor 2, the left lead screw 8 is meshed with the second worm gear 27 because the armature shaft 2b1 of the seat motor 2 rotates in the forward direction. The second helical gear 48 rotates in the forward direction, and thus rotates in the forward direction. On the other hand, when the power supply in the opposite direction is connected to the armature 2b of the seat motor 2, the left lead screw 8 is connected to the second worm gear 27 because the armature shaft 2b1 of the seat motor 2 rotates in the opposite direction. The meshed second helical gear 48 rotates in the opposite direction, and thus rotates in the opposite direction.

Male screw 7a1 of right lead screw 7
On the other hand, the left nut body 12 is meshed with the male thread 8a1 of the left lead screw 8.

The nut body 1 on which the male screw 7a1 of the right lead screw 7 is screwed is attached to the right nut body 11.
1a and a nut housing 11b accommodating the nut main body 11a are provided, and the nut housing 11b is screwed to the lower rail 3 on the right side.

The nut body 1 on which the male screw 8a1 of the left lead screw 8 is screwed is attached to the left nut body 12.
2a and a nut housing 12b accommodating the nut main body 12a are provided, and the nut housing 12b is screwed to the lower rail 4 on the left side.

When the right and left lead screws 7 and 8 respectively rotate in the forward direction, the right and left nut bodies 10 and 11 move the nut bodies 11a and 12a to the right and left male screws 7a1 and 7a1 of the left lead screws 7 and 8, respectively. 8a1, while the right and left gear boxes 9, 1
The right and left upper rails 5 and 6 are moved toward the right and left nut bodies 11 and 12 as shown in FIG. 1 to retract the seat. When the nuts 7 and 8 rotate in opposite directions, respectively, the nut bodies 11a and 12a are screwed into the male screws 7a1 and 8a1 of the right and left lead screws 7 and 8, respectively, while the right and left gear boxes 9, 10 and the right and left, The upper rails 5 and 6 on the left side are moved to the side away from the right and left nut bodies 11 and 12 on the left side in FIG. 1 to advance the seat.

In the seat slide device 1 having such a structure, the right and left upper rails 5 and 6 are attached to the lower surface of the seat, and the right and left lower rails 3 and 4 are fixed to the floor panel and assembled to the vehicle body. Attached. Since the front of the floor panel is higher than the rear, the right and left lower rails 3 and 4 and the right and left upper rails 5 and 6 are inclined so that the front is raised and the rear is lowered so that the vehicle body is inclined. Assembled.

Then, the armature 2 of the seat motor 2
A controller for connecting a power supply is electrically connected to b. Since the controller is installed in the auto driving position system, it supplies current for manual operation by operating the manual switch, switches the ignition switch from the on position to the off position, and opens the door from the closed state. A current for auto operation is supplied by a detection signal generated when the power is turned on.

When the power supply on the opposite side is connected to the armature 2b of the seat motor 2 by switching the manual switch to the forward side, the armature shaft 2b
1 reversely rotates, the first worm gear 26 reversely rotates in the right gear box 9 and the first helical gear 37
Rotates in the opposite direction, and the right lead screw 7 rotates in the opposite direction. At the same time, the second worm gear 27 rotates in the left gear box 10 in the reverse direction, the second helical gear 48 rotates in the reverse direction, and the left lead screw 8 rotates in the reverse direction. As a result, the right and left gear boxes 9 and 10 move in the upward direction away from the right and left nut bodies 11 and 12 together with the right and left upper rails 5 and 6, so that the seat moves forward.

When the sheet is moved forward and reaches the foremost position, the right and left second damper deformation amount regulating members 22, 2
4, the second nut body-side collision portion 3 provided on the regulating member main bodies 33b, 44b of the second nut body side plates 33, 44
3b1 and 44b1 collide with the right and left nut bodies 11 and 12. At that time, the right and left second damper deformation amount regulating members 22 and 24 are arranged in the axial direction of the right and left lead screws 7 and 8 such that the second nut body side plates 33 and 44 is the second stopper side plate 3
2, 43, the volume of the damper holding portions 34, 45 is reduced, and the right and left second dampers 18, 20 are elastically deformed along the axial direction of the right and left lead screws 7, 8. At the same time, the damper holding portions 33c, 44c of the second nut body side plates 33, 44 and the second stopper side plate 3
The right and left lead screws 7 and 8 are provided by the fact that the damper pressing portions 32c and 43c of the second and fourth 43 are disposed outside the right and left second dampers 18 and 20, respectively.
Right and left second dampers 18 and 20 with respect to the radial direction of
Is not elastically deformed, and the impact when it collides with the right and left nut bodies 11, 12 is absorbed. At this time, the right and left second dampers 18 and 20 are configured such that the respective second lead screw insertion portions 18b and 20b are elastically deformed toward the shaft bodies 7a and 8a of the right and left lead screws 7 and 8 respectively. This prevents the right and left second dampers 18 and 20 from being elastically deformed radially outward of the right and left lead screws 7 and 8.

Since the rotation of the right and left lead screws 7 and 8 is restricted, the current supply from the controller is cut off, whereby the rotation of the armature 2b of the seat motor 2 is stopped, and the seat is moved to the front. Stop at the position.

Contrary to the above, when the positive switch is connected to the armature 2b of the seat motor 2 by switching the manual switch to the reverse side, the armature shaft 2b1 rotates forward. First and second worm gears 26 in boxes 9 and 10;
27 rotates forward and the first and second helical gears 37 and 48
Rotates forward, and the right and left lead screws 7, 8 rotate in the forward direction. As a result, the right and left gear boxes 9 and 10 move in a downward direction along with the right and left upper rails 5 and 6 toward the right and left nut bodies 11 and 12, so that the seat starts to move backward.

When the sheet is moved backward and reaches the last position, the right and left first damper deformation amount regulating members 21 and 2 are disposed.
3, the first nut body side collision portion 3 provided on the regulating member main bodies 30b, 41b of the first nut body side plates 30, 41
0b1 and 41b1 collide with the right and left nut bodies 11 and 12. At that time, the right and left first damper deformation amount regulating members 21 and 23 are arranged in the axial direction of the right and left lead screws 7 and 8 so that the first nut body side plate 30 and the first nut body side plate 30, 41 is the first stopper side plate 2
9 and 40, the volume of the damper holding portions 31 and 42 is reduced, and the right and left first dampers 17 and 19 are elastically deformed along the axial direction of the right and left lead screws 7 and 8, At the same time, the damper holding portions 30c, 41c of the first nut body side plates 30, 41 and the first stopper side plate 2
The right and left lead screws 7, 8 are provided by the fact that the damper pressing portions 29c, 40c of 9, 9 are disposed outside the right and left first dampers 17, 19, respectively.
Right and left second dampers 17 and 19 with respect to the radial direction of
Is not elastically deformed, and the impact when it collides with the right and left nut bodies 11, 12 is absorbed. At this time, the right and left first dampers 17 and 19 are configured such that the first lead screw insertion portions 17b and 19b are elastically deformed toward the shaft bodies 7a and 8a of the right and left lead screws 7 and 8, respectively. This prevents the right and left first dampers 17 and 19 from being elastically deformed outward in the radial direction of the right and left lead screws 7 and 8.

Since the rotation of the right and left lead screws 7 and 8 is restricted, the current supply from the controller is cut off, and the rotation of the armature 2b of the seat motor 2 is stopped. Stop at the position.

In contrast to the above, when the ignition switch is switched from the ON position to the OFF position and the door is opened from the closed state, a current for automatic operation is supplied from the controller to the armature 2b of the seat motor 2 and the seat is operated. Since the positive power supply is connected to the armature 2b of the motor 2 and the armature shaft 2b1 rotates forward, the right and left lead screws 7, 8 are rotated in the forward direction, and the right and left gear boxes 9, 10 are rotated right. , The right side in the downward direction to the side approaching the left nut body 11, 12;
The sheet starts to move backward because it moves together with the left upper rails 5 and 6.

When the sheet is moved backward and reaches the last position, the right and left first damper deformation amount regulating members 21 and 2 are disposed.
3, the first nut body side collision portion 3 provided on the regulating member main bodies 30b, 41b of the first nut body side plates 30, 41
0b1 and 41b1 collide with the right and left nut bodies 11 and 12. At that time, the right and left first damper deformation amount regulating members 21 and 23 are arranged in the axial direction of the right and left lead screws 7 and 8 so that the first nut body side plate 30 and the first nut body side plate 30, 41 is the first stopper side plate 2
9 and 40, the volume of the damper holding portions 31 and 42 is reduced, and the right and left first dampers 17 and 19 are elastically deformed along the axial direction of the right and left lead screws 7 and 8, At the same time, the damper holding portions 30c, 41c of the first nut body side plates 30, 41 and the first stopper side plate 2
The right and left lead screws 7, 8 are provided by the fact that the damper pressing portions 29c, 40c of 9, 9 are disposed outside the right and left first dampers 17, 19, respectively.
Right and left second dampers 17 and 19 with respect to the radial direction of
Is not elastically deformed, and the impact when it collides with the right and left nut bodies 11 and 12 is absorbed. At that time, the first dampers 17 and 19 on the right and left sides are connected to the respective first lead screws. The insertion portions 17b and 19b are elastically deformed toward the shaft bodies 7a and 8a of the right and left lead screws 7 and 8, so that the right and left first dampers 17 and 19 become right and left lead screws 7 and 8, respectively. So as not to be elastically deformed radially outward. Then, since the supply of the current to the armature 2b is cut off by the controller, the seat is stopped at the retreat position where the occupant can easily get on and off.

FIG. 5 shows a second embodiment of the seat slide device according to the present invention.

In this case, the right first stopper is attached to the regulating member main body 29b provided on the first stopper side plate 29 of the right first damper deformation regulating member 21 along the axial direction of the right lead screw 7. 13 is provided with a tapered plate portion 29b2 that is formed to protrude in an inclined shape toward the right side 13 and is fixed to the right lead screw 7 on the right first side.
A concave portion 13a capable of accommodating the tapered plate portion 29b2 of the regulating member main body 29b is provided on the inner peripheral side of the stopper 13 of FIG.

The right second damper deformation restricting member 2
2 regulating member main body 32 provided on second stopper side plate 32
b is provided with a tapered plate portion 32b2 which is formed so as to protrude toward the second stopper 14 on the right side along the axial direction of the lead screw 7 on the right side. On the inner peripheral side of the fixed right second stopper 14, a concave portion 14a capable of accommodating the tapered plate portion 32b2 of the regulating member main body 32b is provided.

Then, the regulating member main body 4 provided on the first stopper side plate 40 of the first damper deformation regulating member 23 on the left side.
0b, along the axial direction of the left lead screw 8,
A tapered plate portion 40b2 that is formed to project in an inclined manner toward the first stopper 15 on the left side is provided.
On the inner peripheral side of the left first stopper 15 fixed to the left lead screw 8, a concave portion 15a capable of accommodating the tapered plate portion 40b2 of the regulating member main body 40b is provided.

Further, the left second stopper is attached to the regulating member main body 43b provided on the second stopper side plate 43 of the left second damper deformation regulating member 24 along the axial direction of the left lead screw 8. 16 and a tapered plate portion 43b2 that is formed to protrude in an inclined manner toward the left side 16 and is fixed to the left lead screw 8 on the left side.
A concave portion 16a capable of accommodating the tapered plate portion 43b2 of the regulating member main body 43b is provided on the inner peripheral side of the stopper 16 of FIG. Other parts are the same as in the first embodiment.

In the seat slide device 1 in this case, the tapered plate portions 29b2, 40b2 formed on the right and left first stopper side plates 29, 40 are elongated in the axial direction of the right and left lead screws 7, 8. Because of the length L6, the volumes of the damper holding portions 31, 42 are enlarged in the axial direction of the right and left lead screws 7, 8. Then, the right and left lead screws 7 and 8 are moved to the last position of the seat while being engaged with the right and left nut bodies 11 and 12, so that the right and left first damper deformation amount regulating members 21 and When the right and left nut bodies 11 and 12 collide with 23, the right and left first dampers 1
The right and left lead screws 7, 8 are elastically deformed more in the axial direction of the right and left lead screws 7, 8, thereby reducing the amount of radial deformation of the right and left lead screws 7, 8 in the radial direction.

Then, the right and left lead screws 7, 8 are moved to the frontmost position of the seat while being engaged with the right and left nut bodies 11, 12, thereby regulating the right and left second damper deformation amounts. When the right and left nut bodies 11, 12 collide with the members 22, 24, the damper holding parts 34, 43 are formed by the tapered plate parts 32b2, 43b2 formed on the right and left second stopper side plates 32, 43.
Since the volume of 45 is expanded in the axial direction of the right and left lead screws 7 and 8, the right and left second dampers 18 and 20 are more axially moved in the right and left lead screws 7 and 8. A large amount of elastic deformation reduces the amount of radial deformation of the right and left lead screws 7, 8 in the radial direction.

In this case, the seat slide device 1 can be used without changing the outer diameter of each of the dampers 17, 18, 19, 20 even if the seat has a relatively large weight and a high load.

[0102]

As described above, according to the seat slide device of the first aspect of the present invention, the seat is moved to the stroke end by the forward or backward movement of the rotational force generating portion with respect to the nut body. When it reaches, the damper collides with the nut body. At this time, the elastic deformation of the damper is regulated by the damper deformation regulating member. Therefore,
The damper elastically deforms within a range regulated by the damper deformation regulating member. Therefore, by regulating the rate at which the damper is elastically deformed, an excellent effect is obtained in that the outer diameter and the volume are small, and the damper characteristics can be provided with a small number of dampers.

According to the seat slide device of the second aspect of the present invention, when the sheet reaches the stroke end, the damper arranged in parallel with the stopper on the lead screw collides with the nut body. At this time, the elastic deformation of the damper in the radial direction of the lead screw is regulated by the damper deformation amount regulating member disposed outside. Therefore, in addition to the effect of the first aspect, the damper has an excellent effect that the amount of elastic deformation in the outward direction does not increase.

According to the seat slide device of the third aspect of the present invention, when the sheet reaches the stroke end and the damper collides with the nut body, the damper holding portion of the damper deformation amount regulating member is moved in the axial direction of the lead screw. By changing the length at, the damper is allowed to be elastically deformed in the axial direction of the lead screw, whereas by preventing the change in length in the radial direction of the lead screw, the damper is Suppresses elastic deformation in the radial direction of the lead screw. Therefore, in addition to the effect of claim 2, the damper is elastically deformed in the axial direction of the lead screw, but the amount of elastic deformation in the outward direction is suppressed, so that the damper does not increase in outer diameter. To play.

According to the seat slide device of the fourth aspect of the present invention, when the sheet reaches the stroke end, the damper deformation regulating member on the nut body side of the damper collides with the nut body and the damper on the stopper side of the damper. The deformation regulating member collides with the stopper. Therefore, in addition to the effect of the third aspect, there is an excellent effect that the damper is uniformly elastically deformed in a state of being sandwiched between the stopper side and the nut body side on both sides in the axial direction of the lead screw.

According to the seat slide device of the fifth aspect of the present invention, when the sheet reaches the stroke end, the nut body side collision portion provided in the damper deformation amount regulating member on the nut body side of the damper collides with the nut body. The stopper-side collision portion provided on the damper deformation amount regulating member on the stopper side of the damper collides with the stopper. Therefore, in addition to the effect of claim 4, when the nut body side collision portion approaches the stopper side collision portion, elastic deformation of the damper is allowed in the direction in which the length of the lead screw in the axial direction decreases, and at the same time, There is an excellent effect that the elastic deformation of the damper is suppressed so that the length of the lead screw in the radial direction is not increased.

According to the seat slide device of the sixth aspect of the present invention, when the sheet reaches the stroke end, the nut body side collision portion provided in the damper deformation amount regulating member on the nut body side of the damper collides with the nut body. The stopper-side collision portion provided on the damper deformation amount regulating member on the stopper side of the damper collides with the stopper. At this time, the length of the damper holding portion in the axial direction of the lead screw is increased by the fact that the tapered plate portion provided on the damper deformation amount regulating member on the stopper side of the damper is accommodated in the recess of the stopper. Therefore, the damper is elastically deformed more in the axial direction of the lead screw, and the amount of elastic deformation in the radial direction of the lead screw is reduced. Therefore, Claim 5
In addition to the above-mentioned effects, even a high-load device with a large seat weight can be used without changing the outer diameter of the damper, so it has the excellent effect of having sufficient durability for high-load applications. Play.

According to the seat slide device of the seventh aspect of the present invention, when the sheet reaches the stroke end, the damper arranged in parallel with the stopper on the lead screw collides with the nut body. At this time, the elastic deformation of the damper is restricted in the radial direction of the lead screw by the damper deformation amount regulating member arranged on the outside, and at the same time, the elastic deformation of the lead screw insertion portion is allowed in the gap between the lead screw and the lead screw. You. Therefore, in addition to the effect of claim 2, the damper also has an excellent effect that the inner peripheral side where the lead screw is inserted is elastically deformed, and the amount of elastic deformation in the outward direction is not increased.

[Brief description of the drawings]

FIG. 1 is a partially broken plan view of a first embodiment of a seat slide device according to the present invention.

FIG. 2 is a sectional view around a damper deformation amount regulating member in the seat slide device shown in FIG. 1;

3 is an external perspective view of a damper deformation amount regulating member in the seat slide device shown in FIG.

FIG. 4 is a sectional view around a damper in the seat slide device shown in FIG. 1;

FIG. 5 is a sectional view around a damper deformation amount regulating member in a second embodiment of the seat slide device according to the present invention.

[Explanation of symbols]

Reference Signs List 1 seat slide device 2 seat motor 2b armature 3 (lower rail) right lower rail 4 (lower rail) left lower rail 5 (upper rail) right upper rail 6 (upper rail) left upper rail 7 (lead screw) right lead screw (rotational force generation) 8) (Lead screw) Left lead screw (rotational force generating part) 11 (Nut body) Right nut body 12 (Nut body) Left nut body 13 (Stopper) Right first stopper 13a Recess 14 (Stopper) ) Right second stopper 14a Recess 15 (Stopper) Left first stopper 15a Recess 16 (Stopper) Left second stopper 16a Recess 17 (Damper) Right first damper 17b (Lead screw insertion part) First lead screw insertion Part 18 (Damper) Right second damper 18b (Lead screw insertion part) Second lead screw insertion part 19 (Damper) Left first damper 19b (Lead screw insertion part) First lead screw insertion part 20 (Damper) Left second damper 20b (Lead screw insertion part) Second lead screw insertion part 21 (Damper deformation amount restriction member) Right first damper deformation amount restriction member 22 (Damper deformation amount restriction member) Right side Of the second damper deformation amount regulating member 23 (damper deformation amount regulating member) left first damper deformation amount regulating member 24 (damper deformation amount regulating member) left second damper deformation amount regulating member 29b1 (stopper side collision) Part) First stopper side collision part 29b2 Tapered plate part 30b1 (Nut body side collision part) First nut body side collision part 31 Dan Holding part 32b1 (stopper side collision part) Second stopper side collision part 32b2 Tapered plate part 33b1 (nut body side collision part) Second nut body side collision part 34 Damper holding part 40b1 (stopper side collision part) First stopper Side collision portion 40b2 Tapered plate portion 41b1 (Nut body side collision portion) First nut body side collision portion 42 Damper holding portion 43b1 (Stopper side collision portion) Second stopper side collision portion 43b2 Tapered plate portion 44b1 (Nut body side collision) Part) second nut body side collision part 45 damper holding part

Claims (7)

[Claims] 1. A lower rail fixed to a vehicle body side, an upper rail movably mounted along the lower rail, and fixed to a seat; A seat motor having an armature that rotates in the reverse direction by connection, a nut body fixed to the lower rail, and fixed to the upper rail, and the armature of the seat motor rotates forward to generate a rotational force in the forward direction, A rotating force generating portion that moves forward with respect to the nut body, generates a rotating force in the opposite direction by reverse rotation of the armature of the seat motor, and moves backward with respect to the nut body, and at a stroke end of the seat, A damper made of an elastic body that collides with the nut body, and a damper deformation amount regulating member capable of regulating an elastic deformation amount of the damper. A seat slide device, comprising: 2. A lower rail fixed to the vehicle body side, an upper rail movably mounted along the lower rail, and fixed to a seat; and a forward power supply connected to a forward power supply; A seat motor having an armature that rotates in the reverse direction by connection, a nut body fixed to the lower rail, meshed with the nut body, and rotated forward or reverse by the rotation of the armature of the seat motor to the nut body. A lead screw that moves the upper rail toward the forward or backward side of the seat by moving forward and backward; a stopper disposed on the lead screw according to the stroke of the seat; A damper made of an elastic body that collides with the Seat slide apparatus characterized by a radial-menu and a damper deformation amount regulating member capable restricting the elastic deformation of the damper. 3. A damper holding portion capable of holding a damper is formed inside the damper deformation amount regulating member, and the damper deformation amount regulating member reduces the length of the damper holding portion in the axial direction of the lead screw. The seat slide apparatus according to claim 2, wherein the seat slide device is arranged on the lead screw so that the length of the damper holding portion in the radial direction of the lead screw cannot be changed. 4. The seat slide according to claim 1, wherein the damper deformation regulating member is provided as a pair on the nut body side of the damper and the stopper side of the damper along the axial direction of the lead screw. apparatus. 5. The damper deformation regulating member has a nut-body-side collision portion capable of colliding with the nut body and a stopper-side collision portion capable of colliding with the stopper. Sheet slide device. 6. A stopper formed on the damper side of the stopper so as to be inclined in the axial direction of the lead screw. The stopper-side collision portion of the damper deformation amount regulating member is housed in the stopper recess. 6. The seat slide device according to claim 5, wherein a tapered plate portion is formed so that the length of the damper holding portion in the axial direction of the lead screw can be increased. 7. The seat slide device according to claim 2, wherein the damper is provided with a lead screw insertion portion formed in a polygonal shape and through which a lead screw can be inserted.