JP7221142B2 - seat slide device - Google Patents

Description

The technology disclosed in this specification relates to a seat slide device for moving a seat of an automobile with respect to a vehicle body.

A seat slide device that slides a seat relative to the vehicle body of an automobile is known. The seat slide device includes a lower rail that can be attached to the vehicle body and an upper rail that can be attached to the seat and is slidably engaged with the lower rail. The seat slide device of Patent Document 1 includes a mechanism (adjustment mechanism) that differentiates the sliding resistance when moving the upper rail to one side in the longitudinal direction of the lower rail and the sliding resistance when moving it in the opposite direction. . The seat slide device of Patent Document 1 can reduce the sliding resistance when moving the upper rail (seat) toward the vehicle rear side and relatively increase the sliding resistance when moving the upper rail (seat) toward the vehicle front side. By relatively reducing the sliding resistance when moving the seat to the rear side of the vehicle, the seat can be easily moved to the rear. On the other hand, by relatively increasing the sliding resistance when moving the seat toward the front of the vehicle, it is possible to prevent the occupant from leaning forward due to the vigorous forward movement of the seat.

In the seat slide device of Patent Literature 1, a wedge tapered in the longitudinal direction (longitudinal direction of the lower rail) is sandwiched between the lower rail and the upper rail. The wedge is supported by the upper rail. When the upper rail is moved in the tapering direction of the wedge, the lower rail relatively moves to the thick side of the wedge, and the wedge is pushed to the thick side. At this time, the contact surface pressure between the wedge and the lower rail becomes small, and the sliding resistance becomes small. On the other hand, when the upper rail is moved in the wedge thickening direction, the lower rail relatively moves in the wedge tapering direction, and the wedge is pushed in the tapering direction. At this time, the contact surface pressure between the wedge and the lower rail increases, and the sliding resistance increases.

Japanese Patent Application Laid-Open No. 2018-2130

In the seat slide device of Patent Document 1, wedges are provided on both left and right sides of the upper rail when viewed from the longitudinal direction of the lower rail. A pair of wedges are fixed to one support member. On the other hand, the gap between the upper rail and the lower rail may vary from left to right due to manufacturing tolerances and the like. If the size of the gap varies between the left and right sides, one of the pair of wedges will be tightly sandwiched between the upper rail and the lower rail, and the other will be loosely sandwiched. When the upper rail is locked with respect to the lower rail, it is preferable that both of the pair of wedges are in tight contact between the upper rail and the lower rail. There is a risk that a gap will be created between the wedge of the carriage and the lower rail (or upper rail). A gap between the wedge and the lower rail (or upper rail) (a gap when the upper rail is locked) contributes to rattling of the upper rail (seat).

A seat slide device disclosed in this specification includes a lower rail that can be attached to a vehicle body, an upper rail that can be attached to a seat and is slidably engaged with the lower rail, and an adjustment mechanism that is attached to the upper rail. I have. The adjustment mechanism is a mechanism that adjusts the gap between the lower rail and the upper rail.

The adjustment mechanism has a first wedge and a second wedge that taper along the length of the lower rail. The first wedge is sandwiched between the lower rail and the upper rail on one end side (for example, right side) of the center in the lateral direction of the lower rail. The second wedge is sandwiched between the lower rail and the upper rail on the other end side (for example, left side) of the center in the lateral direction of the lower rail. The first wedge and the second wedge are each independently supported by the upper rail so as to be movable in the longitudinal direction while being biased toward the taper direction of the wedge.

In the seat slide device disclosed in this specification, the left and right wedges are independently urged in the tapering direction of the wedges. Therefore, if there is a gap between the wedge and the lower rail (or upper rail), the wedge moves until the gap disappears due to the urging force. Since each of the left and right wedges is always in close contact with the upper rail and the lower rail, rattling is eliminated.

The first wedge and the second wedge make the sliding resistance of the upper rail with respect to the lower rail when the upper rail moves in the direction opposite to the tapering direction of the wedge greater than the sliding resistance when moving in the tapering direction. Hereinafter, for convenience of explanation, the longitudinal direction of the lower rail may be referred to as the rail longitudinal direction, and the lateral direction thereof may be referred to as the rail lateral direction.

The seat slide device disclosed in this specification may have a third wedge tapered along the longitudinal direction of the rail. The third wedge also has the same structure as the first wedge. The seat slide device disclosed herein may comprise a plurality of third wedges. The plurality of third wedges are distributed on both sides of the rail in the rail width direction, and each third wedge is biased in the tapering direction of the wedge independently of the other wedges. supported so that it can be moved to

The adjustment mechanism of the seat slide device disclosed in this specification may comprise a slider that moves in the longitudinal direction with respect to the upper rail. The slider supports a first wedge and a second wedge (and a third wedge). The slider can move from a position where the first wedge and the second wedge (and the third wedge) are in close contact with the upper rail and the lower rail to a position where they are loosely fitted between the upper rail and the lower rail. When the first wedge and the second wedge (and the third wedge) are loosely fitted between the upper rail and the lower rail, the sliding resistance of the upper rail is reduced.

The slider may move in conjunction with a lock lever that locks and unlocks the upper rail. In that case, the slider holds the first wedge and the second wedge (and the third wedge) in close contact with the upper rail and the lower rail when the upper rail is locked. In the unlocked state, the slider moves in the direction opposite to the tapering direction to keep the first wedge and the second wedge (and the third wedge) loosely fitted between the upper rail and the lower rail.

In the unlocked state, the first wedge and the second wedge (and the third wedge) are loosely fitted so that the upper rail can be moved. At this time, when the upper rail is moved in the tapered direction of the wedge, the lower rail relatively moves to the thick side of the wedge, so that the sliding resistance is reduced. When the upper rail is moved in the direction in which the wedge is thicker, the lower rail relatively moves in the direction in which the wedge is tapered, so the sliding resistance increases. When the slider is in the locked state, the first wedge and the second wedge (and the third wedge) are brought into close contact with both the upper rail and the lower rail to suppress rattling.

Alternatively, the slider may switch the first wedge and the second wedge (and the third wedge) between the tightly fitted state and the loosely fitted state in conjunction with an operation lever operated by the user.

Details and further improvements of the technique disclosed in this specification are described in the following "Mode for Carrying Out the Invention".

1 is a side view of a seat slide device according to an embodiment; FIG. FIG. 4 is a perspective view in which a lower rail and an upper rail are separated; It is a side view of a seat slide device. FIG. 10 is a perspective view of an adjustment mechanism; 4 is an exploded perspective view of the adjustment mechanism; FIG. FIG. 3 is a cross-sectional view of the seat slide device; FIG. 7 is a cross-sectional view along line VII-VII of FIG. 6; FIG. 11 is a plan view of a seat slide device of a second modified example; FIG. 11 is a plan view of a seat slide device of a third modified example;

A seat slide device 2 according to an embodiment will be described with reference to the drawings. FIG. 1 shows a side view of a seat slide device 2 attached to an automobile. The seat slide device 2 is composed of lower rails 10 and upper rails 20 . The lower rail 10 is elongated. The upper rail 20 is attached to the lower rail 10 so as to be movable (slidable) in its longitudinal direction (rail longitudinal direction). The lower rail 10 is fixed to the floor panel 90 of the vehicle body. The upper rail 20 is attached to the lower portion of the seat cushion 81 of the seat 80 . The upper rail 20 is attached to the lower portion of the seat cushion 81 via a frame (not shown). The seat slide devices 2 are attached to the left and right of the lower portion of the seat cushion 81, respectively. The X direction of the coordinate system in the drawing corresponds to the rail longitudinal direction. The Y direction corresponds to the lateral direction of the rail. The +Z direction of the coordinate system in the drawing indicates upward. The positional relationship between each coordinate axis and each part of the seat slide device 2 is the same in all the drawings.

A release lever 83 extends forward from a frame (not shown). The upper rail 20 is normally locked (fixed) with respect to the lower rail 10 . When the user operates the release lever 83 , the lock of the upper rails 20 is released and the upper rails 20 (seat 80 ) can slide with respect to the lower rails 10 .

An operation lever 84 is provided on the side surface of the seat back 82 of the seat 80 . When the user operates the operating lever 84, the seat back 82 is folded forward.

FIG. 2 shows a perspective view of the upper rail 20 separated from the lower rail 10. As shown in FIG. First, the shape of the lower rail 10 will be described. The lower rail 10 is housed in rail grooves provided in the floor panel 90 . The lower rail 10 includes a bottom plate 3 attached to the vehicle body (floor panel 90), a pair of outer plates 4, a pair of upper plates 5, and a pair of inner plates 6. A pair of outer plates 4 extend upward from both ends of the bottom plate 3 in the rail width direction (the Y direction in the drawing). The pair of upper plates 5 extend laterally from the upper ends of the respective outer plates 4 toward the center in the rail width direction. A pair of inner plates 6 extend downward from the inner ends of the respective upper plates 5 . The pair of inner plates 6 are opposed to each other. A lower rail 10 opens upward between the pair of inner plates 6 . The upper surface of the lower rail 10 is elongated along the rail longitudinal direction.

The upper rail 20 will be explained. The lower rail 22 of the upper rail 20 is located inside the lower rail 10 , and the upper body 21 protrudes upward from the lower rail 10 through an opening of the lower rail 10 . Since FIG. 2 shows the upper rail 20 separated from the lower rail 10, it should be noted that the main body lower part 22 is also separated from the lower rail 10. As shown in FIG.

A lower body portion 22 of the upper rail 20 is composed of a pair of side plates 24 that are curved in a U shape when viewed in the longitudinal direction of the rail. Located in A roller 23 is supported by each of the pair of side plates 24 of the upper rail 20 . A roller 23 is also located in the space between the outer plate 4 and the inner plate 6 of the lower rail 10 . The roller 23 abuts on the bottom plate 3 of the lower rail 10 . As the upper rail 20 moves, the roller 23 rotates, and the upper rail 20 moves smoothly.

A lock pin 25 protrudes in the rail width direction from the center of the main body lower portion 22 of the upper rail 20 in the rail longitudinal direction. Although detailed description is omitted, the lock pin 25 retreats inside the main body lower portion 22 when the upper end of the lock lever 26 is pulled in the -X direction of the coordinate system in the figure. One end of a wire 27 is attached to the upper end of the lock lever 26 . The other end of the wire 27 is connected to a release lever 83 (see FIG. 1) operated by the passenger.

The upper rail 20 is fixed to the lower rail 10 by engaging the lock pin 25 with the lock hole 7 of the lower rail 10 . When the occupant operates the release lever 83 (see FIG. 1), the upper end of the lock lever 26 is pulled rearward (-X direction) via the wire 27, the lock pin 25 is retracted to the inside of the main body lower portion 22, and the lock hole is closed. 7 is disengaged. When the lock pin 25 is disengaged, the upper rail 20 becomes movable with respect to the lower rail 10 .

An adjustment mechanism 30 is attached to the upper rail 20 . First, the outline of the adjustment mechanism 30 will be described. Adjustment mechanism 30 includes four wedges 31a-31d. Only wedges 31b and 31d are visible in FIG. 2, and wedges 31a and 31c are not visible as they are located on the opposite side. The wedges 31b and 31d are positioned on the U-shaped side plate 24 of the upper rail 20. As shown in FIG. Although the details will be described later, an inclined groove 241 is provided in the outer upper end of the side plate 24, and the wedges 31b and 31d are accommodated in the inclined groove 241. As shown in FIG. Wedge 31b (31d) is supported by support arm 32b (32d), which is supported by slider 33 (shown in FIG. 4), not visible in FIG. The slider 33 is arranged inside the pair of side plates 24 . Although details will be described later, the slider 33 is movable in the rail longitudinal direction (X direction) in conjunction with the lock lever 26 .

FIG. 3 shows a side view of the seat slide device 2. As shown in FIG. FIG. 3 omits part of the front side plate 24 so that the lock lever 26 and the slider 33 can be seen. In addition, in FIG. 3, the lower rail 10 is drawn with imaginary lines.

An engaging hole 331 is provided substantially in the center of the slider 33 in the longitudinal direction, and the lower end 261 of the lock lever 26 engages with the engaging hole 331 . The lock lever 26 is biased by a spring 28 and pressed against a stopper 242 provided on the side plate 24 of the lower rail 10 . As described above, when the occupant moves the release lever 83 (see FIG. 1), the wire 27 is pulled in the -X direction and the lock lever 26 rotates clockwise (arrow A). At this time, the lower end 261 of the lock lever 26 moves leftward to move the slider 33 leftward (arrow B). Together with the slider 33, the wedges 31b and 31d also move leftward. Although details will be described later, in FIG. 3, the wedge 31a is positioned on the far side of the wedge 31b, and the wedge 31c is positioned on the far side of the wedge 31d. Wedges 31a and 31c are also supported by slider 33, and movement of slider 33 to the left moves four wedges 31a-31d to the left.

FIG. 4 shows a perspective view of the entire adjustment mechanism 30, and FIG. 5 shows an exploded perspective view of the adjustment mechanism 30. As shown in FIG. FIG. 6 shows a sectional view of the seat slide device 2 cut along a plane parallel to the YZ plane of the coordinate system in the figure. FIG. 6 is a sectional view of the seat slide device 2 taken along a plane passing through the wedges 31a and 31b.

As shown in FIG. 5, the adjustment mechanism 30 comprises a slider 33, wedges 31a-31d, support arms 32a-32d, and four coil springs 35. As shown in FIG. The above-described engagement hole 331 is provided substantially in the center of the slider 33 in the longitudinal direction.

FIG. 4 also shows an enlarged view of the wedge 31a. The wedge 31a tapers in the -X direction of the coordinate system in the figure. That is, the wedge 31a is tapered along the rail longitudinal direction. The four wedges 31a-31d all have the same structure and taper in the same direction, ie, the -X direction. The wedges 31a and 31b are arranged in a mirror image relationship with respect to the center line in the rail short direction (Y direction). The wedges 31c and 31d are also arranged in a mirror image relationship with respect to the center line in the rail width direction.

Guides 312 and 313 protrude downward on both sides of the lower surface 315 of the wedge 31a in the rail short direction (Y direction). As described above, the wedge 31a fits into the inclined groove 241 of the side plate 24 of the upper rail 20. As shown in FIG. The wedge 31 a is arranged on the inclined groove 241 of the side plate 24 so that the pair of guides 312 and 313 sandwich the side plate 24 of the upper rail 20 . The pair of guides 312 and 313 sandwich the side plate 24 so that the wedge 31a does not come off from the side plate 24.例文帳に追加

The wedges 31a and 31b are arranged at the same position in the rail longitudinal direction. As shown in FIG. 5, the wedges 31a and 31b are arranged on both sides of the lower rail 10 in the rail width direction. The wedge 31a is sandwiched between the upper plate 5 of the lower rail 10 and the side plate 24 of the upper rail 20 on one end side (-Y side) of the center of the lower rail 10 in the rail width direction. The wedge 31b is sandwiched between the upper plate 5 of the lower rail 10 and the side plate 24 of the upper rail 20 on the other end side (+Y side) of the center of the lower rail 10 in the rail short direction.

The wedge 31a is fixed to the tip of the support arm 32a, and the wedge 31b is fixed to the tip of the support arm 32a. The base portion 321 of the support arm 32a and the base portion 321 of the support arm 32b are slightly different in shape. As shown in FIG. 5, the base 321 of the support arm 32a is superimposed on the base 321 of the support arm 32b, and both bases 321 are fitted into the holes 332 of the slider 33. As shown in FIG. A claw 323 is provided on the upper side of each base 321 , and when the two bases 321 are fitted into the holes 332 , the claws 323 of each base 321 are engaged with the edges 333 on both sides of the holes 332 . be done.

A rod 322 extends in the +X direction from the front surface of the base portion 321 of the support arms 32a and 32b, and the coil spring 35 is fitted to the rod 322. The coil spring 35 is put into the hole 332 of the slider 33 in a compressed state. The elastic force of the coil spring 35 holds the support arms 32 a and 32 b pressed against the rear plate 334 of the slider 33 .

The wedge 31c is fixed to the tip of the support arm 32c, and the wedge 31d is fixed to the tip of the support arm 32d. The base portion 321 of the support arm 32c and the base portion 321 of the support arm 32d are slightly different in shape. As shown in FIG. 5, the base 321 of the support arm 32c is superimposed on the base 321 of the support arm 32d, and both bases 321 are fitted into the holes 335 of the slider 33. As shown in FIG. A claw 323 is provided on the upper side of each base 321 , and when the two bases 321 are fitted into the holes 335 , the claws 323 of each base 321 engage edges 336 on both sides of the holes 335 . be done.

A rod 322 extends in the +X direction from the front surfaces of the bases 321 of the support arms 32c and 32d, and the coil spring 35 is fitted to the rod 322. As shown in FIG. The coil spring 35 is put into the hole 335 of the slider 33 in a compressed state. The elastic force of the coil spring 35 holds the support arms 32 c and 32 d pressed against the rear plate 337 of the slider 33 .

The -X direction of the coordinate system in the drawing corresponds to the tapering direction of the wedges 31a-31d. The four wedges 31a-31d are supported by the slider 33 (that is, the upper rail 20) so as to be movable in the longitudinal direction of the rail while being independently biased in the tapering direction by the four coil springs 35. ing.

As shown in FIG. 5, the wedge 31c is located behind the wedge 31a (-X direction), and the wedge 31d is located behind the wedge 31b. Therefore, like the wedges 31a and 31b, one of the wedges 31c and 31d is sandwiched between the upper plate 5 of the lower rail 10 and the side plate 24 of the upper rail 20 at one end side of the center of the lower rail 10 in the rail width direction. The other is sandwiched between the upper plate 5 of the lower rail 10 and the side plate 24 of the upper rail 20 on the other end side in the rail width direction. The wedges 31a and 31b are located forward of the center of the upper rail 20 in the rail longitudinal direction, and the wedges 31c and 31d are located rearward of the center. The four wedges 31a-31d are positioned at four corners of the upper rail 20 when viewed from above (Z-axis), and are sandwiched between the upper rail 20 and the lower rail 10, respectively. The four wedges 31 a - 31 d are arranged at the four corners of the upper rail 20 to stabilize the upper rail 20 with respect to the lower rail 10 .

As described above, the wedges 31a to 31d are tapered in the -X direction of the coordinate system in the figure, and are supported by the slider 33 while being urged in the tapered direction by the coil springs 35. there is FIG. 7 shows a cross-sectional view taken along line VII--VII in FIG. FIG. 7 shows the structure around wedge 31a, which is the same structure around each of wedges 31b-31d.

As described above, the side plate 24 of the upper rail 20 is provided with the inclined grooves 241 . The wedge 31 a is housed in the inclined groove 241 and sandwiched between the side plate 24 of the upper rail 20 and the upper plate 5 of the lower rail 10 . The bottom surface of the inclined groove 241 is parallel to the lower surface 315 of the wedge 31a. That is, a tapered gap is formed between the upper rail 20 and the lower rail 10, and the wedge 31a is arranged in the gap. In FIG. 7, the inclination of the bottom surface of the inclined groove 241 (the tapered inclination of the wedge 31a) is emphasized to facilitate understanding. On the other hand, the lower surface 5a of the upper plate 5 is parallel to the upper surface 314 of the wedge 31a.

The gap between the upper rail 20 and the lower rail 10 may vary due to manufacturing tolerances and the like. Even in one seat slide device, the size of the gap (tapered gap) between the upper rail 20 and the lower rail 10 may differ depending on the location. FIG. 7A is a diagram when the gap between the upper surface of the side plate 24 of the upper rail 20 and the lower surface 5a of the upper plate 5 of the lower rail 10 is d1, and FIG. It is a figure at the time of d2 (>d1). Since the wedge 31a is urged in the tapering direction (-X direction) by the coil spring 35, the wedge 31a is in close contact between the upper rail 20 and the lower rail 10 regardless of whether the gap is d1 or d2.

The wedges 31a to 31d are independently supported by the upper rail 20 so as to be movable in the longitudinal direction of the rail while being biased in the tapering direction of the wedges. Therefore, all of the wedges 31a to 31d are in close contact with both the upper rail 20 and the lower rail 10 even if the gap between the upper rail 20 and the lower rail 10 is different at each position of the wedges 31a to 31d. Therefore, when the upper rail 20 is locked with respect to the lower rail 10, the upper rail 20 does not rattle.

FIG. 7(C) shows a state in which the lock lever 26 rotates clockwise in FIG. 3 to release the lock and the slider 33 moves leftward. When the slider 33 moves to the left (opposite to the tapering direction of the wedge), the rear plate 334 (337) of the slider 33 pushes the support arms 32a, 32b (32c, 32d) in the opposite direction to the tapering direction of the wedge. 31a-31d are moved to a position where they are loosely fitted between the upper rail 20 and the lower rail 10. Then, as shown in FIG.

When the wedge 31a (31b-31d) moves in the direction opposite to the tapering direction until it loosely fits, a minute gap G is created between the wedge 31a (31b-31d) and the inclined groove 241 of the side plate 24 of the upper rail 20. Therefore, the upper rail 20 becomes movable with respect to the lower rail 10 .

At this time, when the upper rail 20 is moved in the tapering direction of the wedge (-X direction), the lower rail 10 is relatively moved in the thick side of the wedge (opposite direction of the tapering direction). At this time, due to friction between the lower rail 10 and the wedge 31a, the wedge 31a is displaced in the direction in which the minute gap G is increased. Therefore, the contact surface pressure between the lower rail 10 and the wedge 31a (31b-31d) is reduced, and the sliding resistance between the lower rail 10 and the wedge 31a (31b-31d) is reduced. Conversely, when the upper rail 20 is moved in the direction opposite to the tapering direction of the wedge (+X direction), the lower rail 10 relatively moves in the tapering direction of the wedge. At this time, due to the friction between the lower rail 10 and the wedge 31a, the wedge 31a is displaced in the direction in which the minute gap G becomes smaller. Therefore, the contact surface pressure between the lower rail 10 and the wedges 31a (31b-31d) increases, and the sliding resistance between the lower rails 10 and the wedges 31a (31b-31d) increases compared to when they move in the opposite direction.

Wedges 31b-31d function similarly to wedge 31a. As described above, the seat slide device 2 has four wedges 31a to 31d sandwiched between the upper rail 20 and the lower rail 10, and the four wedges 31a to 31d are independently tapered in the wedge direction. energized. When the upper rail 20 is locked with respect to the lower rail 10, the upper rail 20 and the lower rail 10 are in close contact with each other due to the urging force of each of the four wedges 31a to 31d. Therefore, the upper rail 20 does not rattle with respect to the lower rail 10. - 特許庁

The wedges 31a-31d are supported by the slider 33 while being biased in the tapering direction. The slider 33 moves in conjunction with a lock lever 26 that locks and unlocks the upper rail 20 with respect to the lower rail 10 . The slider 33 holds the wedges 31a to 31d in close contact with the upper rail 20 and the lower rail 10 when the upper rail 20 is locked. In the unlocked state, the slider 33 moves in the direction opposite to the tapering direction to keep the wedges 31a to 31d loosely fitted between the upper rail 20 and the lower rail 10. As shown in FIG.

(Modification) In the seat slide device 2 of the embodiment, the lock lever 26 locks and unlocks the upper rail 20 with respect to the lower rail 10 . In contrast to such a structure, in the seat slide device of the first modified example, the slider 33 may be interlocked with a lever that is not related to locking and unlocking. Such a lever interlocks with the operation lever 84 operated by the user to move the wedges 31a to 31d from a state in which the wedges 31a to 31d are in close contact with the upper rail 20 and the lower rail 10 to a loose fit between the upper rail 20 and the lower rail 10. It may be something that switches between states.

The wedge 31a of the embodiment corresponds to an example of the first wedge, and the wedge 31b corresponds to an example of the second wedge. The wedge 31a (first wedge) is sandwiched between the lower rail 10 and the upper rail 20 on one end side (right side) of the center in the rail short direction. The wedge 31b (second wedge) is sandwiched between the lower rail 10 and the upper rail 20 on the other end side (left side) of the center in the rail width direction. The wedges 31a and 31b (first wedge and second wedge) are supported by the upper rail 10 (slider 33) so as to be movable in the longitudinal direction of the rail while being independently urged in the tapering direction of the wedge. there is

The wedges 31c and 31d in the embodiment correspond to an example of the third wedge. The two wedges 31c, 31d have the same structure as the wedge 31a. The two wedges 31c and 31d are distributed on both sides of the center in the rail width direction.

The seat slide device disclosed in this specification may not include the third wedge. Alternatively, the seat slide device disclosed herein may have one third wedge. FIG. 8 shows a plan view of a seat slide device 2a of a second modified example. The seat slide device 2a includes three wedges 31a (first wedge), 31b (second wedge), and 31c (third wedge). In FIG. 8, the upper rail 20 is drawn in phantom lines. Also, the wedges 31a-31c are hidden by the upper plate of the lower rail 10, so they are indicated by broken lines. FIG. 8 is a schematic diagram showing the arrangement of the wedges 31a to 31c, omitting the locking mechanism and rollers.

The wedges 31a, 31b have the same structure as the wedges 31a, 31b of the seat slide device 2 of the embodiment. That is, the wedges 31a and 31b have a tapered shape along the longitudinal direction of the lower rail 10. As shown in FIG. The wedge 31a (first wedge) is sandwiched between the lower rail 10 and the upper rail 20 at one end side of the center of the lower rail 10 in the rail short direction (Y direction). The wedge 31b (second wedge) is sandwiched between the lower rail 10 and the upper rail 20 on the other end side of the center in the rail width direction. The wedges 31a and 31b are independently supported by the upper rail 20 so as to be movable in the longitudinal direction of the rail while being biased in the tapering direction of the wedges. The seat slide device 2a has one third wedge (wedge 31c). Wedge 31c is sandwiched between lower rail 10 and upper rail 20 on the same side as wedge 31a (first wedge). The wedge 31c is also independently supported by the upper rail 20 so as to be movable in the longitudinal direction of the rail while being urged in the tapering direction of the wedge. A support structure for the wedge 31c is the same as the support structure for the wedge 31c of the embodiment.

The seat slide device disclosed herein may comprise a plurality of third wedges. FIG. 9 shows a plan view of a seat slide device 2b of a third modified example. The seat slide device 2b has six wedges 31a-31f. Wedges 31a and 31b correspond to the first and second wedges, respectively, and wedges 31c to 31f correspond to the third wedge. In FIG. 9, the upper rail 20 is drawn in phantom lines. Also, the wedges 31a-31f are hidden by the upper plate of the lower rail 10, so they are indicated by broken lines. FIG. 9 is a schematic diagram showing the arrangement of the wedges 31a to 31f, omitting the locking mechanism, rollers, and the like.

The wedges 31a, 31b have the same structure as the wedges 31a, 31b of the seat slide device 2 of the embodiment. That is, the wedges 31a and 31b have a tapered shape along the longitudinal direction of the lower rail 10. As shown in FIG. The wedge 31a (first wedge) is sandwiched between the lower rail 10 and the upper rail 20 at one end side of the center of the lower rail 10 in the rail short direction (Y direction). The wedge 31b (second wedge) is sandwiched between the lower rail 10 and the upper rail 20 on the other end side of the center in the rail width direction. The wedges 31a and 31b are independently supported by the upper rail 20 so as to be movable in the longitudinal direction of the rail while being biased in the tapering direction of the wedges. The seat slide device 2b has a plurality of third wedges (wedges 31c-31f). The wedges 31c-31f are distributed on both sides of the center in the lateral direction of the rail. Each of the wedges 31c to 31f is supported by the upper rail 20 so as to be movable in the longitudinal direction of the rail while being independently biased in the tapering direction of the wedge. The support structure for wedges 31c-31f is similar to the support structure for wedge 31c of the embodiment.

Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above. The technical elements described in this specification or in the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims as of the filing. In addition, the techniques exemplified in this specification or drawings can simultaneously achieve a plurality of purposes, and achieving one of them has technical utility in itself.

2, 2a, 2b: Seat slide device 10: Lower rail 20: Upper rail 23: Roller 24: Side plate 25: Lock claw 26: Lock lever 30: Adjusting mechanism 31a-31f: Wedge 32a-32d: Support arm 33: Slider 35: Coil spring

Claims (11)

A lower rail that can be attached to the vehicle body,
an upper rail attachable to the seat and slidably engaged with the lower rail;
an adjustment mechanism attached to the upper rail for adjusting a gap between the lower rail and the upper rail;
and
The adjustment mechanism is
having a first wedge and a second wedge tapered along the longitudinal direction of the lower rail,
The first wedge is sandwiched between the lower rail and the upper rail at one end side of the center in the lateral direction of the lower rail,
The second wedge is sandwiched between the lower rail and the upper rail on the other end side of the center in the lateral direction,
The first wedge and the second wedge are each independently supported by the upper rail so as to be movable in the longitudinal direction while being biased toward the tapering direction of the wedge.
seat slide device. The first wedge and the second wedge make the sliding resistance of the upper rail relative to the lower rail when the upper rail moves in the direction opposite to the tapering direction of the wedge greater than the sliding resistance when moving in the tapering direction. 2. The seat slide device according to claim 1, which is enlarged. The adjustment mechanism is
a third wedge having a tapered shape along the longitudinal direction of the lower rail;
The third wedge is tapered in the same direction as the first wedge, and is sandwiched between the lower rail and the upper rail on the one end side of the center in the lateral direction,
3. The third wedge according to claim 1, wherein the third wedge is supported so as to be movable in the longitudinal direction while being biased in the tapering direction of the wedge independently of the first wedge and the second wedge. seat slide device. The third wedge makes the sliding resistance of the upper rail with respect to the lower rail when the upper rail moves in a direction opposite to the tapering direction of the wedge greater than the sliding resistance when moving in the tapering direction. 3. The seat slide device according to 3. The adjustment mechanism is
comprising a plurality of said third wedges,
The plurality of third wedges are distributed on both sides of the center in the lateral direction,
5. The seat slide device according to claim 3, wherein each of said third wedges is supported so as to be movable in said longitudinal direction while being biased in the wedge tapering direction independently of other wedges. . The adjustment mechanism comprises a slider that moves in the longitudinal direction with respect to the upper rail,
Each of the first wedge and the second wedge is supported by the slider,
The slider is movable from a position where the first wedge and the second wedge are in close contact with the upper rail and the lower rail to a position where the first wedge and the second wedge are loosely fitted between the upper rail and the lower rail. 3. The seat slide device according to claim 1 or 2, wherein: The slider is
linked to a lock lever for locking and unlocking the upper rail with respect to the lower rail,
When the upper rail is locked, the first wedge and the second wedge are kept in close contact with the upper rail and the lower rail, and when the lock is released, the first wedge moves in the direction opposite to the tapering direction. 7. The seat slide device according to claim 6, wherein said second wedge is loosely fitted between said upper rail and said lower rail. The slider moves the first wedge and the second wedge from a position where the first wedge and the second wedge are in close contact with the upper rail and the lower rail in conjunction with an operation lever operated by a user. 7. The seat slide device according to claim 6, wherein the seat slide device moves to a position where it is loosely fitted between the lower rails. The adjustment mechanism is
a third wedge having a tapered shape along the longitudinal direction of the lower rail;
The third wedge is tapered in the same direction as the first wedge, and is sandwiched between the lower rail and the upper rail on the one end side of the center in the lateral direction,
7. From claim 6, wherein the third wedge is supported by the slider so as to be movable in the longitudinal direction while being biased in the tapering direction of the wedge independently of the first wedge and the second wedge. 9. The seat slide device according to any one of 8. The third wedge makes the sliding resistance of the upper rail with respect to the lower rail when the upper rail moves in a direction opposite to the tapering direction of the wedge greater than the sliding resistance when moving in the tapering direction. 9. The seat slide device according to 9. The adjustment mechanism is
comprising a plurality of said third wedges,
Each of the plurality of third wedges is tapered in the same direction as the first wedge,
The plurality of third wedges are distributed on both sides of the center in the lateral direction, and are movable in the longitudinal direction while being biased in the tapering direction of the wedge independently of the other wedges. 11. The seat slide device according to claim 9 or 10, supported by said slider.

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