JP2009241698A - Electrically operated seat slide device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a reinforcing plate from being bent by impact load without generating buckling when caulking the reinforcing plate. <P>SOLUTION: As an impact transmission means, this reinforcing plate 4 is connected to the inside of an upper rail 2, while a stopper is connected to a screw shaft in the vicinity of the reinforcing plate 4. When connecting the reinforcing plate 4, an upper pawl part 4a is formed in an upper part of the reinforcing plate 4 and lower pawl parts 4b are formed on both sides of a lower part of the reinforcing plate 4, while an upper part slit 2f is formed in an upper part of the upper rail 2, and lower part slits 2g are formed on both sides of a lower part of the upper rail 2. The upper pawl part 4a and the lower pawl part 4b are fitted into the upper part slit 2f and the lower part slit 2g, respectively, and a caulking part 4c is formed in an external part of the upper rail 2 of the upper pawl part 4a. An insertion hole 4d inserted with the screw shaft therein is formed in the reinforcing plate 4, and a cylindrical part 4e is integrally formed around the insertion hole 4d. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electric seat slide device, which is an improvement in impact transmission means for directly transmitting an impact when an impact load is applied to an upper rail to a lower rail without transmitting the impact to a gear box.

  The seat slide device includes a manual seat slide device that manually moves the seat in the front-rear direction and an electric seat slide device that moves the seat in the front-rear direction by the rotational force of a motor.

  As a conventional electric seat slide device, for example, the one described in Patent Document 1 is known. The basic structure of the electric seat slide device is that an upper rail to which a seat is coupled is arranged inside a lower rail fixed to the vehicle body, a screw shaft is rotatably supported inside the upper rail, and a motor provided on the upper rail is used. The left and right screw shafts of the seat are rotationally driven synchronously, and a nut member screwed to the screw shaft is coupled to the lower rail. A stopper for restricting the movement of the nut member is coupled to the screw shaft by caulking near both ends of the screw shaft.

  Then, when a large load at the time of collision acts on the upper rail, the two flange portions are fixed with a predetermined small interval on the screw shaft so that the load is transmitted to the lower rail via the screw shaft. A load receiving member sandwiched between these flange portions is coupled to the upper rail. The load receiving member is fitted into an engagement hole formed in the upper rail, and is fixed by a push nut or the like.

  However, when an impact load is applied to the upper rail, the load receiving member fixed to the upper rail is pressed against the flange portion. Therefore, the load receiving member fixed to the upper rail is pressed in the axial direction, and the load receiving member bends from the upper rail. There is a risk of falling out. Further, the number of parts increases by the amount of the push nut. Further, the portion of the screw shaft sandwiched between the two flange portions and the gear box receives a compressive force or a tensile force depending on the direction of the impact load, and the screw shaft buckles when receiving the compressive force. There is a fear.

On the other hand, as described in Patent Document 2, the upper part of the rail-side stopper is bifurcated to form a pair of stopper plate portions, and each of the pair of stopper plate portions is fitted into the fixing holes of the upper rail and caulked. There is also a structure of fixing by this.
JP 2001-239861 A JP 2006-335153 A

  However, the electric seat slide device described in Patent Document 2 has a problem that when the caulking is performed by pressing in the vertical direction, the rail-side stopper is compressed to cause buckling, and the rail-side stopper is bent.

  Accordingly, an object of the present invention is to provide an electric seat slide device that employs a rail-side stopper that does not cause buckling even if it is caulked and can withstand a bending moment due to an axial force.

  According to a first aspect of the present invention, there is provided a lower rail having a substantially U-shaped cross section fixed to the vehicle body floor, an upper rail having a substantially inverted U-shaped cross section that is slidably disposed on the lower rail, and an inner portion of the upper rail. A screw shaft disposed along the length direction of the upper rail, a nut coupled to the screw shaft and coupled to the inside of the lower rail, a motor provided on the upper rail side, and a screw shaft A gear box disposed on the shaft center transmits the rotation of the motor to the screw shaft, and is fixed to the upper rail, and an impact load acting on the upper rail is prevented from being transmitted from the gear box to the screw shaft. In the electric seat slide device having an impact transmission means for directly transmitting to the screw shaft, the interior of the upper rail is supplemented as the impact transmission means. While the plate is coupled perpendicularly to the screw shaft, a stopper is coupled to the screw shaft in the vicinity of the reinforcing plate, and an upper claw portion is formed on the upper portion of the reinforcing plate and on both sides of the lower portion. A lower claw portion is formed, while the upper rail is formed with an upper slit on the upper surface portion and a lower slit is formed on the lower portion of the side wall portions on both sides, and the upper claw portion and the lower claw portion are the upper slit, A caulking portion is formed at a portion of the upper claw portion that protrudes to the outside of the upper rail, and an insertion hole through which the screw shaft is inserted is formed in the reinforcing plate. A cylindrical portion is integrally formed around the.

  According to the present invention, since the cylindrical portion is integrally formed with the reinforcing plate, the upper pawl portion and the lower pawl portion of the reinforcing plate are fitted to the upper slit and the lower slit of the upper rail, respectively, so that the reinforcing plate is placed inside the upper rail. It is possible to prevent the insertion hole of the reinforcement plate from being crushed in the vertical direction and to insert the reinforcement plate when a portion of the upper claw part that protrudes to the outside of the upper rail is compressed downward to form the caulking part. It can prevent buckling at the hole. In addition, when an impact load in the screw axis direction is applied to the upper rail, even if the reinforcing plate coupled to the upper rail is pressed against the stopper coupled to the screw shaft, the reinforcing plate is integrally formed with the cylindrical portion and is resistant to bending. Since the strength is high, the reinforcing plate can be prevented from bending.

  According to a second aspect of the present invention, in the electric seat slide device according to the first aspect, the upper end of the lower claw portion extends to the vicinity of the center of the insertion hole.

  According to the present invention, since the upper ends of the lower claw portions formed on both sides of the lower portion of the reinforcing plate extend to the vicinity of the center of the insertion hole, the length of the lower claw portions on both sides fitted to the lower slit of the upper rail is large. Therefore, when an impact load in the direction of the screw axis acts on the upper rail, even if the reinforcing plate coupled to the upper rail is pressed against the stopper coupled to the screw shaft, the strength against bending is great, so the reinforcing plate is not bent. Can be prevented.

  According to a third aspect of the present invention, in the electric seat slide device according to the first or second aspect, a pair of reinforcing plates are respectively disposed at positions where the nut is sandwiched from the axial direction of the screw shaft, and the pair of reinforcing plates It is characterized in that stoppers are arranged on the outside of each.

  According to the present invention, since the stoppers are respectively disposed on the outer sides of the pair of reinforcing plates disposed at positions sandwiching the nut from the direction along the screw shaft, when the upper rail receives an impact load directed toward the front of the vehicle body In the case where the reinforcing plate at the front of the vehicle abuts against the stopper at the front of the vehicle and a tensile force acts on the screw shaft, and the upper rail receives an impact load toward the rear of the vehicle, the reinforcing plate at the rear of the vehicle contacts the stopper at the rear of the vehicle. Pulling force acts on the screw shaft. Therefore, the screw shaft does not receive a compressive force, and buckling due to compression does not occur, so that the strength is greatly improved.

  According to a fourth aspect of the present invention, in the electric seat slide device according to any one of the first to third aspects, the cylindrical portion of the reinforcing plate faces the stopper.

  According to this invention, since the cylindrical part of the reinforcing plate faces the stopper and the cylindrical part of the reinforcing plate presses the stopper coupled to the screw shaft, the reinforcing plate is strong against bending.

  According to the electric seat slide device according to the first aspect, since the cylindrical portion is integrally formed with the reinforcing plate, a part of the upper claw portion of the reinforcing plate is compressed downward to form the caulking portion. Further, the insertion hole of the reinforcing plate can be prevented from being crushed in the vertical direction, and the reinforcement plate can be prevented from buckling at the portion of the insertion hole. For this reason, it is possible to employ caulking fixing to connect the reinforcing plate to the upper rail, and it is possible to reduce the number of parts and improve the assembling property. In addition, when an impact load in the screw axis direction is applied to the upper rail, even if the reinforcing plate coupled to the upper rail is pressed against the stopper coupled to the screw shaft, the strength against bending is large and the reinforcing plate is prevented from bending. it can. For this reason, the intensity | strength with respect to an impact load can be improved significantly.

  According to the electric seat slide device according to claim 2, the lower claws on both sides in which the upper ends of the lower claws formed on both sides of the lower portion of the reinforcing plate extend to the vicinity of the center of the insertion hole and are fitted into the lower slits of the upper rail. Since the length of the part is large, even if the impact load in the screw shaft direction acts on the upper rail, the reinforcing plate will not be deformed even if the reinforcing plate coupled to the upper rail is pressed against the stopper coupled to the screw shaft. However, the strength against impact load is further increased.

  According to the electric seat slide device according to the third aspect, since the stoppers are respectively arranged on the outer sides of the pair of reinforcing plates arranged at the positions sandwiching the nut from the direction along the screw shaft, the upper rail is in any direction. Even when an impact load is applied, the tensile force always acts on the screw shaft. Therefore, the screw shaft does not receive a compressive force, and buckling due to compression does not occur, so that the strength is greatly improved. Since the pair of reinforcing plates also serve as a stroke setting member for setting the movement stroke of the nut, it is not necessary to provide a separate stroke setting member, and the number of parts can be reduced.

  According to the electric seat slide device of the fourth aspect, the cylindrical portion of the reinforcing plate faces the stopper, and the cylindrical portion of the reinforcing plate presses the stopper coupled to the screw shaft. And strong.

Embodiments of an electric seat slide device according to the present invention will be described below.
(Constitution)
As shown in an exploded perspective view in FIG. 7, the electric seat slide device includes a lower rail 1 fixed to a vehicle body floor surface, and an upper rail in which a seat is coupled to the lower rail 1 so as to be slidable in the length direction. 2, a screw shaft 3 disposed along the length direction of the upper rail 2 inside the upper rail 2, a nut 7 screwed to the screw shaft 3 and coupled to the inside of the lower rail 1, A motor (not shown) that is provided on the upper rail 2 and rotationally drives the screw shaft 3, and is arranged on the axis of the screw shaft 3 to reduce the rotation of the motor and transmit it to the screw shaft 3. And a gear box 6 fixed to the upper rail 2. The electric seat slide device shown in FIG. 7 is provided at each of the left and right positions of the seat, and the front portions of the upper rail 2, which is the right end of FIG. 7, are connected by a connecting member (not shown). The output shaft of the single motor provided on the connecting member is connected to an input shaft (not shown) in the input cylinder 6 a of the left and right gear boxes 6, and the respective screw shafts are connected via the gear box 6. 3 are driven synchronously.

  As shown in FIG. 1, the lower rail 1 has a substantially U-shaped cross-section with an open top, a bottom surface portion 1a, a side wall portion 1b bent upward from the bottom surface portion 1a, and the side wall portion 1b. It is comprised from the downward bending part 1c bent toward the inner side downward from the upper end. As shown in FIG. 7, legs 19 and 20 are coupled to both ends of the lower rail 1 via bolts 15 to 18, and the legs 19 and 20 are coupled to the vehicle body floor via bolts (not shown). ing. On the other hand, the cross-sectional shape of the upper rail 2 is a substantially inverted U shape with an opening at the bottom, an upper surface portion 2a, a side wall portion 2b bent downward from the upper surface portion 2a, and an outer upper side from the lower end of the side wall portion 2b. It is comprised from the upward bending part 2c bent toward the direction. A sheet is coupled to the upper rail 2 via four bolts 21. The upper rail 2 is inserted into the lower rail 1 so as to be slidable in the length direction, and the upward bent portion 2c of the upper rail 2 enters between the side wall portion 1b and the downward bent portion 1c of the lower rail 1.

  A guide ball 9 is provided between the lower rail 1 and the upper rail 2. The guide balls 9 are respectively arranged at positions above and below the retainer 8 while being held by the retainer 8. The retainer 8 and the guide ball 9 are provided in two pairs at the front and rear positions as a pair of left and right.

  The screw shaft 3 is rotatably supported inside the upper rail 2 by fixing the gear box 6 to the upper rail 2. As shown in FIG. 7, the left end of the gear box 6 is attached to the right end of the upper rail 2, and the gear box 6 is coupled to the upper rail 2 via two bolts 22. Note that, instead of the bolts 22, rivets may be used for caulking and fixing.

  Fixing stoppers 1d are formed on the left and right sides of the lower rail 1 to prevent the retainer 8 and the guide ball 9 from coming off and preventing displacement. On the other hand, four sets of movable stoppers 2d and 2e protrude upward and downward on the outer surface of the upward bent portion 2c of the upper rail 2. The retainer 8 is arranged between the left two sets and the right two sets of the four sets of movable stoppers 2d and 2e.

  A configuration in the vicinity of the nut 7 will be described with reference to FIGS. The nut 7 is coupled to the lower rail 1 via a nut holding member 11 and an elastic body 12. The nut holding member 11 includes a coupling portion 11a coupled to the inner bottom surface of the lower rail 1 and a pair of holding portions 11b erected at the vehicle body front-rear position of the coupling portion 11a. Each of these is formed with a first insertion hole 11c through which the screw shaft 3 is inserted. The elastic body 12 is formed in a substantially rectangular parallelepiped shape, and a recess 12b for fitting the nut 7 is formed on the upper surface of the elastic body in which the second insertion hole 12a through which the screw shaft 3 is inserted is formed. A fitting space 12c for fitting the holding portion 11b from below is formed on both sides in the direction along the second insertion hole 12a. The elastic body 12 is made of rubber. A nut 7 is fitted into the recess 12b from above, and a pair of holding portions 11b are fitted into the fitting space 12c from below. The nut 7 is fitted in the recess 12b without gaps in the front and rear and left and right directions, and the screw shaft 3 inserted through the first insertion hole 11c and the second insertion hole 12a is screwed into the nut 7, and a nut holding member 11 coupling portions 11 a are coupled to the inner bottom surface of the lower rail 1 via bolts 14. Thereby, as shown in FIG. 6, side surfaces 12 d located on both sides in the moving direction of the elastic body 12 are provided close to the inner side surface 2 x of the upper rail 2.

  When the vehicle collides, an impact load acts on the upper rail 2. An impact transmission means 13 is provided for preventing an impact load acting on the upper rail 2 from being transmitted from the gear box 6 coupled to the upper rail 2 to the screw shaft 3 and being transmitted directly from the upper rail 2 to the screw shaft 3. Is provided. As shown in FIGS. 2 and 3, the impact transmission means 13 includes a reinforcing plate 4 as a stroke setting member that is coupled to the inside of the upper rail 2 at right angles to the screw shaft 3, and the above-described vicinity of the reinforcing plate 4. The stopper 5 is coupled to the screw shaft 3. The impact transmission means 13 is disposed at two locations sandwiching the elastic body 12 surrounding the nut 7 from the axial direction of the screw shaft 3. That is, a pair of reinforcing plates 4 are arranged at positions sandwiching the elastic body 12, and the stoppers 5 are arranged outside the respective reinforcing plates 4.

  The attachment state of the reinforcing plate 4 will be described with reference to FIG. An upper claw portion 4a is formed at the upper center of the reinforcing plate 4, and lower claw portions 4b are formed on both sides of the lower portion. On the other hand, an upper slit 2f is formed in the upper surface portion 2a of the upper rail 2, and a lower slit 2g is formed in the lower portion of both side wall portions 2b. The upper claw portion 4a and the lower claw portion 4b are formed in the upper slit 2f and the lower slit 2g. Each is fitted. And the caulking part 4c is formed in the both sides of the upper nail | claw part 4a which protrudes outside the upper rail.

  A third insertion hole 4 d through which the screw shaft 3 is inserted is formed in the central portion of the reinforcing plate 4. When the caulking portion 4c is formed, the reinforcing plate 4 is compressed in the vertical direction, and when the impact load is applied to the upper rail 2, the reinforcing plate 4 is pressed against the stopper 5, so that the strength of the reinforcing plate 4 is increased. In order to ensure, a cylindrical portion 4e projecting to one side is integrally formed around the third insertion hole 4d. The cylindrical portion 4 e is formed at a position facing the stopper 5. Further, in order to ensure the strength of the reinforcing plate 4 when the reinforcing plate 4 is pressed against the stopper 5, the lower claw portion 4b and the cylindrical portion 4e are partially overlapped with each other in the vertical direction. By extending the upper end to the vicinity of the center of the insertion hole 4d, the length of the lower claw portion 4b in the vertical direction is long. Here, sufficient gaps are formed between the first to third insertion holes 11 c, 12 a, 4 d and the screw shaft 3.

  On the other hand, the screw shaft 3 is inserted into the stopper 5, and the stopper 5 is caulked by pressing a plurality of locations from the outer peripheral portion of the stopper 5 toward the shaft center, and the stopper 5 is coupled to the screw shaft 3.

Thus, the elastic body 12 can be moved between the pair of reinforcing plates 4, and the pair of reinforcing plates 4 also serves as a stroke setting member for setting the moving stroke of the elastic body 12. is doing.
(Function)
Next, the operation of the electric seat slide device will be described.

  When an output shaft of a motor (not shown) is rotated, the rotation of the output shaft is decelerated by a speed reducer in the left and right gear boxes 6 of the seat and transmitted to the screw shaft 3 in the upper rail 2. Then, the rotation of the screw shaft 3 causes the nut 7 coupled to the lower rail 1 to move relative to the vehicle body longitudinal direction along the screw shaft 3. For this reason, the upper rail 2 moves to the front of the vehicle body or to the rear of the vehicle body with respect to the lower rail 1. Then, when the end surface of the elastic body 12 comes into contact with any one of the reinforcing plates 4 at the front and rear of the vehicle body, the movement of the upper rail 2 in the front-rear direction is stopped. In addition, before the movable stoppers 2d and 2e positioned at the center portion of the upper rail 2 come into contact with the front or rear fixed stopper 1d of the lower rail 1 via the retainer 8, the end face of the elastic body 12 is either one of the reinforcing plates 4. The upper rail 2 stops moving in the front-rear direction. That is, the moving stroke of the upper rail 2 is set at a position where the elastic body 12 contacts the reinforcing plates 4 on the front and rear sides of the vehicle body.

  When an impact load directed to the front of the vehicle body is applied to the upper rail 2 due to a vehicle collision or the like, the reinforcement plate 4 coupled to the upper rail 2 moves forward as shown in FIG. Collides with the front stopper 5. Therefore, the impact load is not directly transmitted from the upper rail 2 to the gear box 6 coupled to the upper rail 2, and the impact load that pulls the gear box 6 away from the screw shaft 3 by transmitting the impact load to the gear box 6 It is blocked from acting. At this time, a tensile force acts on the screw shaft 3. When an impact load directed toward the rear of the vehicle body is applied to the upper rail 2, the reinforcing plate 4 at the rear of the vehicle body collides with the stopper 5 at the rear of the vehicle body. Therefore, the impact load is not directly transmitted from the upper rail 2 to the gear box 6 coupled to the upper rail 2, and the impact load is transmitted to the gear box 6 and the gear box 6 is prevented from pressing the screw shaft 3. Is done. Also at this time, a tensile force acts on the screw shaft 3.

  According to the present invention, since the cylindrical portion 4e is integrally formed with the reinforcing plate 4, the upper claw portion 4a and the lower claw portion 4b of the reinforcing plate 4 are fitted to the upper slit 2f and the lower slit 2g of the upper rail 2, respectively. When the reinforcing plate 4 is disposed inside the upper rail 2 and a part of the upper claw portion 4a protruding to the outside of the upper rail 2 is pressed downward to compress the reinforcing plate 4 to form the caulking portion 4c, The insertion hole 4d of the reinforcement plate 4 can be prevented from being crushed in the vertical direction, and the reinforcement plate 4 is prevented from buckling at the portion of the insertion hole 4d. Further, when an impact load in the direction of the screw shaft 3 is applied to the upper rail 2, even if the reinforcing plate 4 coupled to the upper rail 2 is pressed against the stopper 5 coupled to the screw shaft 3, the reinforcing plate 4 remains in the cylindrical portion 4e. Are integrally formed and the strength against bending is large, so that the reinforcing plate 4 can be prevented from bending. For this reason, the intensity | strength with respect to an impact load can be improved significantly.

According to the present invention, since the upper ends of the lower claw portions 4b formed on both sides of the lower portion of the reinforcing plate 4 extend to the vicinity of the center of the insertion hole 4d, the lower claws on both sides fitted to the lower slit 2g of the upper rail 2 are provided. The length of the part 4b is large. Therefore, when an impact load in the direction of the screw shaft 3 is applied to the upper rail 2, the reinforcing plate 4 is deformed even if the reinforcing plate 4 coupled to the upper rail 2 is pressed against the stopper 5 coupled to the screw shaft 3. No, the strength against impact load is further increased.
Since the strength against bending is large, the reinforcing plate 4 is difficult to bend.

  According to the present invention, since the stoppers 5 are respectively arranged outside the pair of reinforcing plates 4 sandwiching the nut 7 from the direction along the screw shaft 3, the upper rail 2 receives an impact load directed toward the front of the vehicle body. When the reinforcing plate 4 at the front of the vehicle abuts against the stopper 5 at the front of the vehicle and a tensile force acts on the screw shaft 3, and the upper rail 2 receives an impact load toward the rear of the vehicle, the reinforcing plate 4 at the rear of the vehicle A pulling force acts on the screw shaft 3 in contact with the stopper 5. Accordingly, the screw shaft 3 does not receive a compressive force, and buckling due to compression does not occur, so that the strength is greatly improved. Since the pair of reinforcing plates 4 also serve as a stroke setting member for setting the movement stroke of the nut 7, it is not necessary to provide a separate stroke setting member, and the number of parts can be reduced.

  According to the present invention, the cylindrical portion 4e of the reinforcing plate 4 faces the stopper 5, and the cylindrical portion 4e of the reinforcing plate 4 presses the stopper 5 coupled to the screw shaft 3, so that the reinforcing plate 4 is bent. Strong against it.

  In addition, you may employ | adopt the structure which the upper end of a lower nail | claw part does not extend to center vicinity of an insertion hole. Moreover, although the stopper was each arrange | positioned on the outer side of each of a pair of reinforcement plate arrange | positioned in the position which pinches | interposes a nut, you may arrange | position a stopper also inside. Further, a configuration in which the pair of reinforcing plates do not serve as a stroke setting member that sets the movement stroke of the nut may be employed. Furthermore, a configuration in which the cylindrical portion of the reinforcing plate does not face the stopper may be employed.

Sectional drawing which shows the principal part of an electric seat slide apparatus (embodiment). Front sectional drawing of an electric seat slide device (embodiment). Action | operation explanatory drawing of an electric seat slide apparatus (embodiment). The perspective view (embodiment) of the vicinity of the nut in the electric seat slide device. The longitudinal cross-sectional view of the electric seat slide apparatus and the vicinity of the nut (embodiment). FIG. 4 is a cross-sectional view of the electric seat slide device in the vicinity of the nut (embodiment). The exploded perspective view of an electric seat slide device (embodiment).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lower rail 2 ... Upper rail 2f ... Upper slit 2g ... Lower slit 3 ... Screw shaft 4 ... Reinforcement plate (stroke setting member)
4a ... Upper claw part 4b ... Lower claw part 4c ... Caulking part 4d ... Third insertion hole (insertion hole)
4e ... Cylinder part 5 ... Stopper 6 ... Gear box 7 ... Nut 13 ... Shock transmission means

Claims (4)

A lower rail having a substantially U-shaped cross-section fixed to the vehicle body floor surface, an upper rail having a substantially inverted U-shaped cross-section disposed slidably on the lower rail, and the length of the upper rail in the upper rail. A screw shaft, a nut screwed to the screw shaft and coupled to the inside of the lower rail, a motor provided on the upper rail side, and a screw shaft disposed on the axis of the screw shaft. The rotation of the motor is transmitted to the screw shaft, and the gear box fixed to the upper rail and the impact load acting on the upper rail are prevented from being transmitted from the gear box to the screw shaft and directly transmitted to the screw shaft. In the electric seat slide device provided with the impact transmission means,
As the impact transmission means, a reinforcing plate is coupled to the inside of the upper rail perpendicular to the screw shaft, while a stopper is coupled to the screw shaft in the vicinity of the reinforcing plate,
The reinforcing plate has an upper claw portion formed on the upper portion and a lower claw portion formed on both sides of the lower portion, while the upper rail has an upper slit formed on the upper surface portion and side wall portions on both sides. A lower slit is formed in the lower part, and the upper claw part and the lower claw part are respectively fitted to the upper slit and the lower slit, and a caulking part is formed in a part protruding to the outside of the upper rail of the upper claw part,
An electric seat slide device, wherein an insertion hole through which the screw shaft is inserted is formed in the reinforcing plate, and a cylindrical portion is integrally formed around the insertion hole. The electric seat slide device according to claim 1,
The electric seat slide device, wherein an upper end of the lower claw portion extends to the vicinity of the center of the insertion hole. In the electric seat slide device according to claim 1 or 2,
A pair of reinforcing plates are respectively disposed at positions where the nut is sandwiched from the axial direction of the screw shaft, and a stopper is disposed on each outer side of the pair of reinforcing plates. The electric seat slide device according to any one of claims 1 to 3,
The electric seat slide device, wherein the cylindrical portion of the reinforcing plate is opposed to the stopper.

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