JPH11240361A - Seat sliding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deterioration of seating feeling by arranging nut body energization means which can pressurize a first and second nut body in the axially opposite directions of lead screws, and eliminating backlash between the screw threads of the lead screws and the nuts. SOLUTION: Bilateral upper rails 6, 4 can be moved on bilateral lower rails 5, 3, while a seat is fixed to their upper portions. Bilateral nut cases 16, 11 are attached to the lower rails 5, 3. Shock absorbing damper members 19, 14, first nub bodies 17, 12 and second nut bodies 18, 13 are respectively housed therein. Bilateral nut body energizing means 10, 15 are formed. In respect to the first and second nut bodies 17, 12, 18, 13, bilateral lead screws 10, 8 show flank state on a pressure side, on the opposite side of thread screws, in normal and reverse turning. Backlash is eliminated between the nut body and the lead screw. Seating feeling is thus improved.

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 As a sheet slide apparatus for automatically sliding a sheet, there is known a sheet slide apparatus in which a single nut is engaged with a lead screw.

[0003]

In the above-described seat slide apparatus, if there is a backlash between the screw formed on the nut body and the lead screw, a backlash occurs in the moving direction of the seat, and there is a backlash. As a result, there is a problem that the seat feels uncomfortable, and solving this problem has been an issue.

[0004]

SUMMARY OF THE INVENTION A seat slide apparatus according to the present invention provides a high-quality seat slide apparatus that does not make a seat feel bad by eliminating backlash between a lead screw and a nut body. It is intended to be.

[0005]

Configuration of the Invention

[0006]

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,
It has an upper rail fixed to the seat, an output shaft that rotates forward by supplying current in the forward direction and rotates in the reverse direction by supplying current in the reverse direction, and a seat motor that is fixed to the upper rail or the lower rail and an output shaft of the seat motor Combined forward and reverse rotation of the lead screw, and a nut case fixed to the lower rail or upper rail by allowing the lead screw to be inserted, and a first nut body housed in the nut case and meshed with the lead screw, A second nut body formed independently of the first nut body, housed in a nut case along the axial direction of the lead screw, and meshed with the lead screw;
A shock absorbing damper member disposed around the first nut body and the second nut body, and the first nut body and the second nut body can be pressed in mutually opposite directions in the axial direction of the lead screw. It is characterized in that it has a configuration provided with a nut body urging means.

In the seat slide device according to a second aspect of the present invention, the nut body urging means is disposed between the first and second nut bodies, and the nut body urging means is located on the side that separates the first and second nut bodies. The first elastic member is configured to be able to be pressed against the first elastic member.

According to a third aspect of the present invention, in the seat slide device, the first elastic member of the nut body urging means is formed integrally with the shock absorbing damper member. .

In the seat slide device according to a fourth aspect of the present invention, the nut case has the first plate portion formed on the first nut body side and the first plate portion formed on the second nut body side. A second plate portion is formed facing the first nut portion, and the nut body urging means is disposed between the first plate portion and the first nut body to move the first nut body toward the second nut body. A second elastic member that can be pressed, and a third elastic member that is arranged between the second plate portion and the second nut body and that can press the second nut body toward the first nut body. It is characterized by having such a configuration.

In the seat slide device according to a fifth aspect of the present invention, the second and third elastic members of the nut body urging means are formed integrally with the shock absorbing damper member. Features.

[0011]

In the seat slide apparatus according to the first aspect of the present invention, when the lead screw rotates forward or backward by the seat motor fixed to the upper rail or the lower rail, the lead screw is accommodated in the nut case fixed to the lower rail or the upper rail. Since the first nut body and the second nut body advance and retreat respectively with respect to the lead screw, the upper rail to which the seat is fixed moves forward or backward on the lower rail. At this time, since the first nut body and the second nut body are pressed in directions opposite to each other by the nut body urging means, the threads of the first and second nut bodies are equal to the threads of the lead screw. The opposing sides are pressure side flanks. Therefore, backlash between the thread of the lead screw and the first and second nut bodies is eliminated.

In the seat slide device according to a second aspect of the present invention, when the first nut body and the second nut body advance and retreat with respect to the lead screw, respectively, they are disposed between the first and second nut bodies. The first and second nut bodies are pressed by the first elastic member away from each other, so that the threads of the first and second nut bodies are opposite to the threads of the lead screw. The pressure side flanks are arranged on the side. Therefore, in addition to the function of claim 1, the nut body urging means is constituted only by the first elastic member disposed between the first and second nut bodies. There is no need to change the body or nut case to a complicated structure.

According to a third aspect of the present invention, the first elastic member is formed integrally with the shock absorbing damper member. Therefore, in addition to the effect of the second aspect, since the nut body urging means is formed at the same time when the shock absorbing damper member is formed, the number of steps does not increase.

In the seat slide device according to a fourth aspect of the present invention, when the first nut body and the second nut body advance and retreat with respect to the lead screw, respectively,
The first nut member is pressed toward the second nut member by the second elastic member disposed between the plate member and the first nut member, while the second plate member and the second nut member are pressed. Since the second nut body is pressed toward the first nut body side by the third elastic member disposed between the body and the body, the threads of the first and second nut bodies are aligned with the threads of the lead screw. On the other hand, pressure side flanks are arranged on opposite sides. Therefore, in addition to the operation of the first aspect, the nut body urging means is the first,
Since it is composed of the second and third elastic members arranged on both sides of the second nut body, it is not necessary to change the first and second nut bodies and the nut case into a complicated structure.

In the seat slide device according to a fifth aspect of the present invention, the second and third elastic members are formed integrally with the shock absorbing damper member. Therefore, in addition to the function of the fourth aspect, since the nut body urging means is formed at the same time when the shock absorbing damper member is formed, the number of steps does not increase.

[0016]

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

The illustrated seat slide device 1 mainly includes a seat motor 2, a right lower rail 3, a right upper rail 4, a left lower rail 5, a left upper rail 6, a right gear box 7, a right lead screw 8, and a left lead screw 8. Gear box 9, left lead screw 1
0, right nut case 11, right first nut body 1
2. Right second nut body 13, right shock absorbing damper member 14, right nut body urging means 15, left nut case 16, left first nut body 17, left second nut
, A shock absorbing damper member 19 on the left side, and a nut body urging means 20 on the left side.

The seat motor 2 has a gear box 9 on the left side.
Mounted on The seat motor 2 has magnets 2b and 2c opposed to each other inside a motor case 2a. An armature 2d is rotatably housed inside the magnets 2b and 2c, and an output shaft 2e is mounted on the armature 2d. Are combined.

The sheet motor 2 is supplied with a current on the positive side from a seat control circuit (not shown), so that the output shaft 2
e rotates forward, and on the contrary, the output shaft 2e rotates reversely by supplying a current on the opposite side from the seat control circuit. The output shaft 2 e is connected to the right gear box 7 by a cable 21 and is also directly connected to the left gear box 9.

A gear reduction mechanism (not shown) is built in the right gear box 7, and the output shaft 2e is connected to the right lead screw 8 through a cable 21 by the gear reduction mechanism. The right lead screw 8 is cantilevered by the right gear box 7, extends along the right lower rail 3, and has a male screw 8a1 formed in the center of the shaft body 8a. A right first damper 22 and a right first stopper 23 are fixed to the right lead screw 8 on the right gear box 7 side of the shaft main body 8a, respectively. On the opposite side, a right second damper 24 and a right second stopper 25 are fixed.

The left lead screw 10 is supported by the left gear box 9 in a cantilever manner, extends along the left lower rail 5, and has a male screw 10a1 formed at the center of the shaft body 10a. The left lead screw 10 has a left first damper 26 and a left first stopper 27 fixed to the left gear box 9 side of the shaft body 10a, respectively, and the left gear box 9 of the shaft body 8a.
A second damper 28 on the left side and a second stopper 29 on the left side are fixed to the side opposite to the first side.

The right gear box 7 is fixed to the front of the right upper rail 4, and the left gear box 9 is fixed to the front of the left upper rail 6. The right upper rail 4 is movably mounted on the right lower rail 3, and the left upper rail 6 is movably mounted on the left lower rail 5. A seat (not shown) is fixed on the right upper rail 4 and the left upper rail 6. The right nut case 11 is attached to the right lower rail 3, and the left nut case 16 is attached to the left lower rail 5.

As shown in FIG. 3, the nut case 11 on the right side has a nut body accommodating portion 11b formed inside a nut case main body 11a having a box shape with an open top. As shown in FIG. 2, the nut body accommodating portion 11b
The length L1 is set, and as shown in FIG.
2

The right nut case 11 has a first plate portion 11c and a second plate portion 11d formed on both sides in the longitudinal direction of the nut case main body 11a so as to face each other. A third plate portion 11e and a fourth plate portion 11f are formed on opposite sides of the nut case body 11a, and a fifth plate portion 11g is formed at the bottom of the nut case main body 11a. In the first plate portion 11c, a round lead screw insertion hole 11c1 having an inner diameter larger than the outer diameter of the male screw 8a1 of the right lead screw 8 is formed, and in the second plate portion 11d, Right lead screw 8
A round lead screw insertion hole 11d1 having an inner diameter larger than the outer diameter of the male screw 8a1 is formed. The nut case 11 on the right side is provided with a rail fixing portion 11h on the fifth plate portion 11g of the nut case main body 11a.
Is fixed to the right lower rail 3 by screwing a screw 30 into the rail fixing portion 11h from below the right lower rail 3.

The nut housing 11b of the right nut case 11 houses a right shock absorbing damper member 14, a right first nut 12, and a right second nut 13, respectively. Right shock absorbing damper member 14
Is formed with a right-side nut body urging means 15.

The right shock absorbing damper member 14 is formed of rubber as a material, and as shown in FIG.
It has a pentahedral damper member body 14a whose upper part is open.
This damper member main body 14a is, as shown in FIG.
The length L3 is slightly smaller than the length L1 of the nut body accommodating portion 11b of the right nut case 11, and is slightly smaller than the width L2 of the right nut case 11, as shown in FIG. The width L4 is set. Therefore, the right shock absorbing damper member 14 is housed in the nut body accommodating portion 11b of the right nut case 11.

A first side plate 14b contacting the first plate portion 11c of the right nut case 11 and a second plate portion of the right nut case 11 are provided on the damper member body 14a of the right shock absorbing damper member 14. Second side plate 14 in contact with 11d
c, a third side plate 14d in contact with the third plate 11e of the right nut case 11, a fourth side plate 14e in contact with the fourth plate 11f of the right nut case 11, and a fifth side of the right nut case 11. Rail fixing portion 1 facing plate portion 11g of
It has a fifth side plate 14f located above 1h. First
The side plate 14b has a round lead screw insertion hole 14b.
1 is formed, and a round lead screw insertion hole 14c1 is formed in the second side plate 14c.

The right nut body urging means 15 is disposed between the first side plate 14b and the second side plate 14c of the right shock absorbing damper member 14. The right-side nut body urging means 15 is located at an intermediate position between the first and second side plates 14b and 14c of the right-side shock absorbing damper member 14, and the third and fourth parts of the right-side shock absorbing damper member 14 are also provided. Side plate 14
d, 14e, the first and second side plates 14b, 1
4c, the first elastic member 15a on the right side is formed in a plate shape in the same manner as 4c, and is integrally formed with the shock absorbing damper member 14 on the right side. The first elastic member 15a on the right side has a round lead screw insertion hole 15b.
Are formed. As shown in FIG. 4, the first elastic member 15a on the right side may be formed in a flat washer shape or a wave washer shape and formed separately from the shock absorbing damper member 14 on the right side.

Then, the right shock absorbing damper member 14
A first nut body fitting portion 14g partitioned by a first side plate 14b and a first elastic member 15 on the right side is formed on the second side plate 14c and the first elastic member 15 on the right side. And the second nut body fitting portion 14h partitioned by
Are formed. At this time, as shown in FIG.
The first elastic member 15a on the right has a thickness L5 in the length direction of the right shock absorbing damper member 14 before being elastically deformed, and the first nut body fitting portion 14g has a length L5. The dimension is L6, and the second nut body fitting portion 14h is the length dimension 7.

The right first nut body 12 is fitted into the first nut body fitting portion 14g of the right shock absorbing damper member 14, and the second nut body 12 of the right shock absorbing damper member 14 is fitted therein.
The right second nut body 13 is inserted into the nut body fitting portion 14f.
Is fitted.

As shown in FIG. 2, the first nut body 12 on the right side has a first nut body 12 a formed in a rectangular parallelepiped shape, and the first nut body 12 a of the shock absorbing damper member 14 on the right side. The length L8 is slightly larger than the length L6 of the fitting portion 14g. First nut body 12
On a, a female screw 12a1 meshed with a male screw 8a1 formed on the right lead screw 8 is formed.

The right second nut body 13 is connected to the right first nut body 13.
As shown in FIG. 2, the second nut body 13a formed in a rectangular parallelepiped shape is formed independently of the nut body 12 of the second shock absorbing damper member 14 on the right side. The length L9 is slightly larger than the length L7 of the body fitting portion 14h. Second nut body 1
A female screw 13a1 meshed with a male screw 8a1 formed on the right lead screw 8 is formed in 3a.

The right first nut body 12 is inserted into the first nut body fitting portion 14g of the right shock absorbing damper member 14, and the right second nut body 13 is inserted into the right shock absorbing damper member 14. 14 is inserted into the second nut body fitting portion 14h. Then, since the length dimension L8 of the right first nut body 12 is slightly larger than the length dimension L6 of the first nut body fitting portion 14g of the right shock absorbing damper member 14, the right first first nut body 12 has the same length. The elastic member 15a has a length L5.
Is resiliently deformed in a direction to reduce the pressure, and an elastic repulsive force is accumulated in the first elastic member 15a on the right side. At the same time, the length L9 of the right second nut body 13 is slightly larger than the length L7 of the second nut body insertion portion 14h of the right shock absorbing damper member 14, so that the right The one elastic member 15a is elastically deformed in a direction to reduce the length L5, and elastic repulsion is accumulated in the first elastic member 15a on the right side.

The first elastic member 15a on the right side is connected to the first and second nut bodies 12, 1 on the right side by the first and second nut body fitting portions 14g, 14h of the right shock absorbing damper member 14.
Since the elastic repulsive force is accumulated by the fitting of the first nut 3, the first nut body 12 on the right side is connected to the first side plate 14 b of the right shock absorbing damper member 14 and the first plate of the right nut case 11. While pressing the second nut body 13 on the right side to the right shock absorbing damper member 1 on the right side.
4 and presses against the second plate portion 11d of the right nut case 11 to urge the first and second nut bodies 12 and 13 away from each other.

Then, the first elastic member 15a on the right side
In the nut case 11 on the right side, the first and second nut bodies 1
Since the right and left lead screws 8 are inserted into the female screws 12a1 and 13a1 of the first and second nut bodies 12 and 13, respectively, the right lead screw 8 is pressed rightward. When rotating, as shown in FIG. 2, the second thread 12a2 formed on the female thread 12a1 of the first nut body 12 is opposed to the thread 8a2 formed on the external thread 8a1 of the right lead screw 8. The nut body 13 side is a pressure side flank 12a3, and the opposite side of the thread 12a2 from the second nut body 13 is a play side flank 12a4, while the second nut body 1
Of the thread 13a2 formed in the female screw 13a1
The nut body 12 side is referred to as a pressure side flank 13a3, and the opposite side of the thread 13a2 from the first nut body 12 is referred to as a play side flank 13a4. When the right lead screw 8 rotates in the reverse direction, the first and second
The opposite sides of the threads 12a2, 13a2 formed on the internal threads 12a1, 13a1 of the nut bodies 12, 13 are pressure-flanks 12a3, 13a3.

The right first elastic member 15a allows the right first and second nut bodies 12 and 13 to engage with the female screw 12a1 both when the right lead screw 8 rotates forward and backward. , 13a1 thread 12a2,
Opposite sides of 13a2 are pressure side flanks 12a3, 13
Since it is a3, there is no backlash between the female screws 12a1 and 13a1 of the first and second nut bodies 12 and 13 and the male screw 8a1 of the right lead screw 8.

On the other hand, the left nut case 16 is the right nut case 11, the left shock absorbing damper member 19 is the right shock absorbing damper member 14, and the left first nut body 17 is the right first nut member 17. Since the nut body 12 and the second nut body 18 on the left side are configured similarly to the second nut body 13 on the right side, the description is omitted. A left first elastic member 20a formed similarly to the right first elastic member 15a of the right nut body urging means 15 is provided.

In the seat slide device 1 having such a structure, the seat switch provided in the seat control circuit is turned on to the retreat side, whereby the seat motor 2 is turned on.
When the current on the positive side is supplied, the right and left lead screws 8 and 10 respectively start positive rotation. When the right lead screw 8 rotates forward, the right gear box 7 moves in a direction approaching the right nut case 11, and when the left lead screw 10 rotates forward, the left nut case 16 rotates. Moves in the direction in which the left gear box 9 approaches,
The seat fixed to the upper rails 4 and 6 on the left retreats.

When the sheet reaches the rearmost end, the first sheet on the right
Collides with the right nut case 11 and the first damper 26 on the left collides with the left nut case 16, so that the right and left lead screws 8, 1.
When the rotation of 0 is constrained, the current supply from the sheet control circuit is cut off, and the sheet stops at the last retreat position.

Contrary to the above, when the sheet switch of the sheet control circuit is turned on to the forward side to supply the reverse current to the seat motor 2, the right and left lead screws 8, 10 are respectively reversed. Start spinning. Reverse rotation of the right lead screw 8 causes the right gear box 7 to move away from the right nut case 11, and reverse rotation of the left lead screw 10 causes the left nut case 16 to rotate. , The left gear box 9 moves in a direction away from it, and the seats fixed to the right and left upper rails 4 and 6 advance.

When the sheet reaches the foremost end, the second sheet on the right
Collides with the right nut case 11 and the left second damper 28 collides with the left nut case 16, thereby causing the right and left lead screws 8, 1.
When the rotation of 0 is constrained, the current supply from the sheet control circuit is cut off, and the sheet stops at the most advanced position.

When the seat moves forward and backward, the right lead screw 8 and the right first and second right screws are provided by the right first elastic member 15a disposed in the right nut case 11. The nut bodies 12 and 13 are engaged with each other without causing backlash, and the left first first elastic member 20a disposed in the left nut case 16 and the left lead screw 10 First and second nut bodies 17, 18 on the left side
Are engaged without backlash.

FIGS. 5 and 6 show a second embodiment of the seat slide device according to the present invention, and in this case, only the right portion will be described.

In this case, the right nut body urging means 15
Are not arranged between the right first nut body 12 and the right second nut body 13, and the first plate part 11 c of the right nut case 11 and the right first nut body 12 And the right third elastic member 15c and the right third nut member 13 between the second plate portion 11d of the right nut case 11 and the right second nut body 13.
The left-side nut body urging means 20 is configured similarly to the right-side nut body urging means 15. Other parts are the same as in the first embodiment.

As shown in FIG. 6, the second elastic member 15c on the right side is the first elastic member 15c of the shock absorbing damper member 14 on the right side.
The right third elastic member 15d is integrally formed with the second side plate 14c of the right shock absorbing damper member 14. The second and third elastic members 15c and 15d on the right side may be formed in a flat washer shape or a wave washer shape to be separate from the shock absorbing damper member 14 on the right side.

The second elastic member 15c on the right side has a function of pressing the first nut body 12 on the right side toward the second nut body 13 on the right side, and the third elastic member 15d on the right side has a function It has a function of pressing the second nut body 13 toward the right first nut body 12. At this time, the female screw 12a1 of the first nut body 12 on the right side and the female screw 13a1 of the second nut body 13 on the right side are closer to each other than at the interval between the threads of the male screw 8a1 of the right lead screw 8. Is smaller in size and is meshed with the male screw 8a1 of the right lead screw 8, so that the elastic repulsive force is accumulated in the second and third elastic members 15c and 15d on the right.

In this case, the second elastic member 15c on the right side moves the first nut body 12 into the second nut body 13 in the right nut case 11 by the accumulated elastic repulsive force.
Side, and the third elastic member 15d on the right side is moved to the right nut case 11 by the accumulated elastic repulsive force.
In order to press the second nut body 13 toward the first nut body 12 inside the female screw 1 of the first and second nut bodies 12, 13,
When the right lead screw 8 rotates forward with the right lead screw 8 inserted in 2a1 and 13a1, the thread formed on the male screw 8a1 of the right lead screw 8 as shown in FIG. 8a2, the second nut body 13 side of the thread 12a2 formed in the female screw 12a1 of the first nut body 12 is
a3, and the opposite side of the thread 12a2 from the second nut body 13 is a play-side flank 12a4.
The first nut body 12 side of the thread 13a2 formed in the female screw 13a1 of the second nut body 13 is connected to the pressure side flank 1
3a3, and the opposite side of the thread 13a2 from the first nut body 12 is a play-side flank 13a4. Similarly, when the right lead screw 8 rotates in the reverse direction, the female screw 12a of the first and second nut bodies 12, 13 is formed in the same manner as described above.
Opposite sides of the threads 12a2 and 13a2 formed on the first and 13a1 are referred to as pressure side flanks 12a3 and 13a3.

The second and third right elastic members 15c, 15
d, the right first and second nut bodies 12, 13
When the right lead screw 8 rotates forward and backward, the opposite sides of the threads 12a2 and 13a2 of the female threads 12a1 and 13a1 become the pressure side flanks 12a3 and 13a3, respectively. The backlash is eliminated between the female screws 12a1 and 13a1 of the second nut bodies 12 and 13 and the male screw 8a1 of the right lead screw 8.

In this case, as shown in FIG.
A first shim 31 is disposed between the second elastic member 15c and the first nut body 12, and a second shim is disposed between the third elastic member 15d and the second nut body 13. 32 are arranged, as shown in FIG.
The first and second shims 31 and 32 may be removed.

[0050]

As described above, according to the seat slide device of the first aspect of the present invention, when the lead screw is rotated forward or backward by the seat motor fixed to the upper rail or the lower rail, the lower rail or the upper rail is rotated. Since the first nut body and the second nut body accommodated in the nut case fixed to the lead screw advance and retreat respectively with respect to the lead screw, the upper rail to which the seat is fixed moves forward or backward on the lower rail. At this time, since the first nut body and the second nut body are pressed in directions opposite to each other by the nut body urging means, the threads of the first and second nut bodies are equal to the threads of the lead screw. The opposing sides are pressure side flanks. Therefore, backlash between the thread of the lead screw and the first and second nut bodies is eliminated. Therefore, by eliminating the backlash between the lead screw and the nut body,
An excellent effect is provided that a high-quality seat slide device that does not make the seat feel uncomfortable can be provided.

According to the seat slide device of the second aspect of the present invention, when the first nut body and the second nut body advance and retreat with respect to the lead screw, respectively, there is a gap between the first and second nut bodies. The first and second nut bodies are pressed to the sides separated from each other by the first elastic member disposed in the first and second nut bodies, respectively, so that the threads of the first and second nut bodies are respectively opposed to the threads of the lead screw. Pressure side flanks are arranged on opposite sides. Therefore, in addition to the effect of claim 1, since the nut body urging means is constituted only by the first elastic member disposed between the first and second nut bodies, the first and second nuts are provided. There is no need to change the body or nut case to a complicated structure. Therefore, an excellent effect that productivity can be improved is achieved.

According to the third aspect of the present invention, the first elastic member is formed integrally with the shock absorbing damper member. Therefore, in addition to the effect of the second aspect, since the nut body urging means is formed at the same time when the shock absorbing damper member is formed, there is an excellent effect that the number of steps is not increased.

According to the seat slide device of the present invention, when the first nut body and the second nut body advance and retreat with respect to the lead screw, respectively,
The first nut member is pressed toward the second nut member by the second elastic member disposed between the plate member and the first nut member, while the second plate member and the second nut member are pressed. Since the second nut body is pressed toward the first nut body side by the third elastic member disposed between the body and the body, the threads of the first and second nut bodies are aligned with the threads of the lead screw. On the other hand, pressure side flanks are arranged on opposite sides. Therefore, in addition to the effect of claim 1, the nut body urging means is the first,
Since it is composed of the second and third elastic members arranged on both sides of the second nut body, it is not necessary to change the first and second nut bodies and the nut case into a complicated structure. Therefore, an excellent effect that productivity can be improved is achieved.

According to the seat slide device of the fifth aspect of the present invention, the second and third elastic members are formed integrally with the shock absorbing damper member. Therefore, in addition to the effect of the fourth aspect, since the nut body urging means is formed at the same time when the shock absorbing damper member is formed, there is an excellent effect that the number of steps 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 longitudinal sectional side view around a reed screw explaining an assembling relationship between a lead screw and a nut body in the seat slide device shown in FIG.

FIG. 3 is an external perspective view illustrating an assembling relationship between a nut body urging means and a nut body in the seat slide device shown in FIG. 1;

FIG. 4 is an external perspective view illustrating a nut body urging unit having a shape different from that of FIG. 3;

FIG. 5 is a longitudinal sectional side view around a reed screw explaining an assembling relationship between a lead screw and a nut body in a second embodiment of the seat slide device according to the present invention.

6 is an external perspective view for explaining an assembling relationship between a nut body urging means and a nut body in the seat slide device shown in FIG. 4;

[Explanation of symbols]

Reference Signs List 1 seat slide device 2 seat motor 2e output shaft 3 (lower rail) right lower rail 4 (upper rail) right upper rail 5 (lower rail) left lower rail 6 (upper rail) left upper rail 8 (lead screw) right lead screw 10 (lead Screw) left lead screw 11 (nut case) right nut case 11c first plate portion 11d second plate portion 12 (first nut body) right first nut body 13 (second nut body) Left second nut body 14 (shock absorbing damper member) Right shock absorbing damper member 15 (nut body urging means) Right nut body urging means 15a (first elastic member) Right first first Elastic member 15c (second elastic member) Right second elastic member 15d (third elastic member) Third elastic member 16 (nut case) left nut case 17 (first nut body) left first nut body 18 (second nut body) left second nut body 19 (shock absorbing damper Member) Left shock absorbing damper member 20 (Nut body urging means) Left nut body urging means 20a (First elastic member) Left first elastic member

Claims (5)

[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; and a forward rotation by supplying current in a forward direction and a supply of current in a reverse direction. A seat motor having an output shaft that rotates in the reverse direction and fixed to the upper rail or the lower rail; a lead screw that is connected to the output shaft of the seat motor and rotates forward and backward; and the lower rail that allows the lead screw to be inserted therethrough Alternatively, a nut case fixed to the upper rail, a first nut body housed in the nut case and meshed with the lead screw, and a first nut body formed independently of the first nut body, The second is accommodated in the nut case along the axial direction and meshed with the lead screw. , A shock absorbing damper member disposed around the first nut body and the second nut body, and the first nut body and the second nut body in the axial direction of the lead screw. A seat slide device comprising nut body urging means capable of pressing in mutually opposing directions. 2. The nut body urging means comprises a first elastic member disposed between the first and second nut bodies and capable of pressing the first and second nut bodies away from each other. The seat slide device according to claim 1, wherein: 3. The first elastic member of the nut body urging means,
3. The seat slide device according to claim 2, wherein the seat slide device is formed integrally with the shock absorbing damper member. 4. A nut case, wherein a first plate portion is formed on a first nut body side, and a second plate portion is formed on a second nut body side in opposition to the first plate portion. A second elastic member that is formed between the first plate portion and the first nut body and is capable of pressing the first nut body toward the second nut body; 2. The device according to claim 1, further comprising a third elastic member disposed between the second plate portion and the second nut body and capable of pressing the second nut body toward the first nut body. The sheet slide device as described in the above. 5. The seat slide device according to claim 4, wherein the second and third elastic members of the nut body urging means are formed integrally with the shock absorbing damper member.