Slide structure of vehicle seat

Abstract

To provide a slide structure of a vehicle seat which inhibits increase of costs and enables easy assembly work while varying resistance to movement between slide directions.SOLUTION: A slide structure (SK) of a vehicle seat includes: a lower rail (1) attached to a floor (FL) in a vehicle including a vehicle seat (ST); an upper rail (2) which is attached to a seat cushion (91) of the vehicle seat (ST) and engages with the lower rail (1) to slide; and a resistance providing part (3) attached to an end of the upper rail (2). The resistance providing part (3) includes: a main part (31) attached to the end; a rotation arm part (32) which rotates around an axis (CL3) extending in a width direction of the lower rail (1) relative to the main part (31) and enters a gap (H3) between the main part (31) and a top wall part (12) of the lower rail (1); and a biasing member (34) which biases the rotation arm part (32) in a direction such that the rotation arm part enters the gap (H3).SELECTED DRAWING: Figure 5A

Description

[Technical Field]

[0001] The present invention relates to a sliding structure for a vehicle seat. [Background technology]

[0002] Patent Document 1 describes a sliding structure for a vehicle seat in which the sliding resistance of an upper rail fixed to a seat cushion against a lower rail is smaller when the seat moves backward than when it moves forward. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7166059 Summary of the Invention [Problem to be solved by the invention]

[0004] In some cases, when a vehicle seat slides, for example, in the fore-and-aft direction, it is desirable to have different resistance to movement between the forward movement, which is a first direction, and the backward movement, which is the opposite second direction. For example, in a large minivan, the floor on which the vehicle seat is installed may be higher toward the rear. In this case, it is desirable for the vehicle seat to have lower resistance to movement toward the rear, which is higher, than to the forward movement, to facilitate the seat sliding operation.

[0005] To meet this demand, it is possible to adopt the sliding structure described in Patent Document 1, but that sliding structure requires a large number of parts and assembly steps, which increases costs and makes assembly difficult.As such, a sliding structure for a vehicle seat that has different movement resistance between a first sliding direction and a second sliding direction opposite thereto is desired, while suppressing increases in costs and making assembly easy, even while achieving different movement resistance between sliding directions. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention has the following configuration. 1) A lower rail attached to the floor of a vehicle having a vehicle seat; an upper rail attached to a seat cushion of the vehicle seat and engaging with the lower rail to slide; a resistance applying portion attached to an end portion of the upper rail; Equipped with The resistance applying unit is a main body attached to the end portion; a rotating arm portion that rotates relative to the main body portion about an axis extending in the width direction of the lower rail and enters a gap between the main body portion and a top wall portion of the lower rail; a biasing member that biases the pivot arm in a direction of entering the gap; The sliding structure of a vehicle seat has the following features. 2) The sliding structure for a vehicle seat according to 1), wherein the rotating arm has a sickle-shaped portion formed in a sickle shape as a portion that enters the gap. 3) A sliding structure for a vehicle seat as described in 2), in which, when the upper rail slides relative to the lower rail, the sickle-shaped portion slides against the underside of the top wall portion while being biased by the force of the biasing member. 4) The sliding structure of a vehicle seat described in 2) is such that the sickle-shaped portion is plate-shaped and has a shape that widens from the tip side to the base side, and the larger the gap, the more it penetrates into the gap toward the base side. 5) The sliding structure of a vehicle seat described in any one of 1) to 4) above, wherein the resistance applying portion is attached to a first end of the upper rail, and the resistance force when sliding the vehicle seat toward the first end is greater than the resistance force when sliding toward the opposite side of the first end. [Effects of the Invention]

[0007] According to the present invention, the movement resistance varies depending on the sliding direction, but an increase in cost is suppressed and assembly work is easy. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a left side view of a vehicle seat ST equipped with a first embodiment of a sliding structure SK, which is one embodiment of the sliding structure for a vehicle seat of the present invention. [Figure 2] FIG. 2 is a left side view showing the upper rail 2 and the resistance applying portion 3 in the sliding structure SK. [Figure 3A] FIG. 3A is a perspective exploded view of the resistance applying unit 3. FIG. [Figure 3B] FIG. 3B is a perspective view showing a method for attaching the resistance applying part 3 to the upper rail 2. As shown in FIG. [Figure 4] FIG. 4 is a front view of the sliding structure SK. [Figure 5A] FIG. 5A is a left side view showing the resistance applying unit 3 in the first state. [Figure 5B] FIG. 5B is a left side view showing the resistance applying unit 3 in the second state. [Figure 6A] FIG. 6A is a left side view showing the state of force applied to the resistance application part 3 when the upper rail 2 moves rearward. [Figure 6B] FIG. 6B is a left side view showing the state of force applied to the resistance application part 3 when the upper rail 2 moves forward. [Figure 7] FIG. 7 is a left side view showing a second mode of the sliding structure SK. [Figure 8] FIG. 8 is a perspective view showing a sliding structure SKA in the case where the seat ST has a connecting frame 5. As shown in FIG. [Figure 9A] FIG. 9A is a schematic front view showing a sliding structure SKA1 which is a first modified example of the sliding structure SKA. [Figure 9B] FIG. 9B is a schematic front view showing a sliding structure SKA2, which is a second modified example of the sliding structure SKA. [Figure 9C]FIG. 9C is a schematic front view showing a sliding structure SKA3, which is a third modified example of the sliding structure SKA. DETAILED DESCRIPTION OF THE INVENTION

[0009] One embodiment of the sliding structure for a vehicle seat of the present invention will be described using sliding structure SK. In the description, the up, down, front, and back directions are defined by the arrows shown in Fig. 1. The left direction is the front side of the paper in Fig. 1, and the right direction is the back side of the paper in Fig. 1. The left-right direction is also referred to as the width direction.

[0010] First, the outline of the configuration of a vehicle seat ST equipped with a sliding structure SK will be described with reference to Fig. 1. Fig. 1 is a left side view of the vehicle seat ST.

[0011] As shown in Fig. 1, lower rails 1 extending in the front-to-rear direction are laid on the floor FL of a vehicle. A vehicle seat ST (hereinafter referred to as seat ST) includes a seat cushion 91, a seat back 92, and a headrest 93. The seat cushion 91 has upper rails 2 at its bottom, which are engaged with the lower rails 1 and are slidable in the front-to-rear direction. This allows the seat ST to slide in the front-to-rear direction on the lower rails 1 (see arrow DR1).

[0012] Fig. 2 is an enlarged view of the upper rail 2 and the lower rail 1 in Fig. 1. The slide structure SK has the upper rail 2 and a resistance applying part 3 attached to the front end thereof.

[0013] FIG. 3 is an exploded perspective view of the resistance applying unit 3. As shown in FIG. 3, the resistance applying unit 3 includes a main body 31, a pivot arm 32, a pin 33, a coil spring 34, and an E-ring. The main body 31 is formed in a generally box-like shape to form an upwardly open space V31 in the center. The main body 31 is formed of, for example, resin. The main body 31 has a through-hole 31a that passes through the space V31 and is centered on an axis CL3 extending in the left-right direction. The opening edges of the through-hole 31a form seats 31b that protrude slightly to the left and right as annular seats.

[0014] A pair of guide pieces 312 extending rearward and spaced apart in the left-right direction, and an engagement piece 313 extending rearward from the center of the left and right below the guide pieces 312 are formed on the rear surface of the main body 31. The tip of the engagement piece 313 is a hook-shaped engagement portion 313a.

[0015] An upwardly extending pillar-shaped locking portion 315 is formed at the upper end of the left-right center of the rear portion of the main body 31. The pillar-shaped locking portion 315 has a support portion 315b extending upward from the main body 31 and a pair of locking portions 315c extending rearward in the up-down and front-rear directions from the tip of the support portion 315b. The pair of locking portions 315c extend parallel to each other at a predetermined distance d and have through holes 135a on the same axis extending in the left-right direction.

[0016] A trunk portion 341 of the coil spring 34 is housed in a space V31 in the center of the main body 31. The left and right upper surfaces of the space V31 in the main body 31 each serve as a sliding portion 314. The sliding portion 314 has an arc-shaped curved surface centered on the axis CL3 in a range forward of a vertical plane CLV (see FIG. 5A) including the axis CL3. Hereinafter, the left sliding portion 314 may be referred to as sliding portion 314L, and the right sliding portion 314 may be referred to as sliding portion 314R.

[0017] The coil spring 34, which serves as a biasing member, is a torsion coil spring that exerts elastic force when twisted, and includes a body portion 341 wound in a coil shape with the left-right direction as its axial direction, and a pair of arms 343 extending from both left and right ends. The body portion 341 includes a body portion 341L and a body portion 341R that are connected and spaced apart in the left-right direction. An arm portion 343L is bent from the left end of the body portion 341L and extends radially outward. An arm portion 343R is bent from the right end of the body portion 341R and extends radially outward.

[0018] The pair of pivot arms 32 are plate-like members of the same shape and are formed, for example, from resin. The pivot arm 32 includes a base 32c having a through hole 32c1, an extension 32a, and a sickle-shaped portion 32b. The extension 32a extends radially outward from the base 32c, and the sickle-shaped portion 32b bends from the tip of the extension 32a and extends in a sickle shape. A notch 32d is formed at the boundary between the extension 32a and the sickle-shaped portion 32b, cutting inward from the outer surface 32b2. The inner surface 32b1 of the sickle-shaped portion 32b is formed in an arc shape centered on the axis of the through hole 32c1, and the outer surface 32b2 is formed as a curved surface whose distance from the axis of the through hole 32c1 decreases toward the tip in left and right side views. That is, the sickle-shaped portion 32b is plate-like and has a shape that widens from the tip to the base in side view. The axis of the through hole 32c1 coincides with the axis CL3 after the resistance applying part 3 is assembled.

[0019] The resistance applying unit 3 is assembled as follows. With the coil spring 34 housed in the space V31, the pin 33 is inserted through the through-hole 32c1 of the left rotating arm 32, the left through-hole 31a of the main body 31, the trunk 341L, the trunk 341R, the right through-hole 31a of the main body 31, and the through-hole 32c1 of the right rotating arm 32, and an E-ring 35 is fitted into the circumferential groove 33a at the tip to prevent it from coming off. The arm 343L of the coil spring 34 is engaged with the notch 32d of the rotating arm 32L, and the arm 343R is engaged with the notch 32d of the rotating arm 32R. As a result, the pair of rotating arms 32 are rotatable about the axis CL3 relative to the main body 31, and are biased by the coil spring 34 in the clockwise direction in FIG. 3A (see arrow DR2 in FIGS. 3A and 3B).

[0020] As shown in FIG. 4 (viewed from the front), the lower rail 1 has a bottom wall 13, side walls 11, and a top wall 12, and is generally U-shaped with a gap 1d open at the center of the upper side. The lower rail 1 is fixed to the floor FL (see FIG. 1) of the vehicle's passenger compartment. A pair of side walls 11 are formed, rising upward from both left and right edges of the bottom wall 13. The top wall 12 is formed to extend like eaves from the upper ends of the pair of side walls 11, approaching each other in the left-right direction. The tips of the pair of top wall 12 are spaced apart in the left-right direction, forming a gap 12d. A running rail portion 14 is formed in a lower portion of the inner surface of each of the pair of side walls 11, protruding inward. The upper surface of the running rail portion 14 is an inclined surface that slopes downward toward the inside. Note that in FIG. 4, when it is necessary to distinguish between a pair of left and right parts, the left and right parts are distinguished by adding an L and an R to the end of the reference numerals. For example, the left running rail section 14 is running rail section 14L, and the right running rail section 14R.

[0021] As shown in FIG. 4, the upper rail 2 has a rail base 21 and rollers 22. The rail base 21 has a base portion 211 and an upward extension portion 212 (see FIG. 3B), and the base portion 211 is recessed in the space V inside the lower rail 1 and accommodated so as to be movable in the front-to-rear direction. Rollers 22 are attached to the front and rear of the base 211, respectively. The left and right ends of the rollers 22 are formed with large diameters so that they roll on the traveling rail portions 14L, 14R while making surface contact with them. This allows the upper rail 2 to move smoothly in the space V inside the lower rail 1. Furthermore, as described above, the traveling rail portions 14L, 14R have inclined surfaces that slope downward toward the center in the left-to-right direction, and the rollers 22 make surface contact with the traveling rail portions 14L, 14R, so that the upper rail 2 is automatically centered in the left-to-right direction when moving in the front-to-rear direction.

[0022] The upward extension 212 of the upper rail 2 extends upward through the gap 12d between the top wall 12L and the top wall 12R. The upper part of the upward extension 212 is connected to the frame (not shown) of the seat cushion 91, so that the upper rail 2 and the seat cushion 91 move together in the front-to-rear direction.

[0023] As shown in Fig. 3B, a through-hole 212a with a central axis extending in the left-right direction is formed near the front end of the upward extension 212 of the upper rail 2. A pair of gaps 214, which are spaces extending in the front-rear direction, are formed in symmetrical positions in the base 211. A recess 213 with a rectangular cross section carved upward a predetermined length is formed in the center of the bottom surface of the base 211, extending rearward a predetermined length. The innermost portion of the recess 213 is formed as an engagement portion 213a, which is carved deeper than the entrance side.

[0024] The resistance applying unit 3 is attached to the front end of the upper rail 2 as follows. As shown in FIG. 3B , the pair of guide pieces 312 on the main body 31 of the resistance applying unit 3 are inserted into the pair of gaps 214 of the upper rail 2, and the engagement pieces 313 are engaged with the engagement portions 213a along the recesses 213. At the same time, the upward extending portion 212 of the upper rail 2 is inserted between the pair of locking portions 315c of the columnar locking portion 315, and the resin clip 36 is passed through the through hole 315a of the left locking portion 315c, the through hole 212a, and the through hole 315a of the right locking portion 315c to secure the clip in place. This secures the resistance applying unit 3 to the end of the upper rail 2.

[0025] 5A to 6B are left side views of the vicinity of the resistance applying portion 3 when the upper rail 2, to which the resistance applying portion 3 is attached, is mounted on the lower rail 1. In FIGS. 5A to 6B, the relationship between the left rotating arm portion 32L and the ceiling underside surface 12La is mainly described, but the relationship between the right rotating arm portion 32R and the ceiling underside surface 12Ra is also similar.

[0026] The vertical position of the upper rail 2 on the lower rail 1 is determined by the contact position of the roller 22 with the traveling rail portion 14 shown in Fig. 4. There is also a gap between the rail base 21 of the upper rail 2 and the upper portion 311a of the base 311 of the resistance applying portion 3 and the ceiling underside 12La of the top wall portion 12L that faces them above.

[0027] If the gap between the upper portion 311a of the base 311 and the ceiling undersides 12La, 12Ra is defined as gap H3 (see FIG. 5A), the rotating arm 32 of the resistance applying unit 3 is biased clockwise in FIG. 5A by the coil spring 34, so that the sickle-shaped portion 32b enters gap H3. That is, the inner surface 32b1 of the sickle-shaped portion 32b of the rotating arm 32 abuts the sliding portion 314 of the base 311 in a face-to-face contact manner, and the outer surface 32b2 of the sickle-shaped portion 32b abuts the ceiling underside 12La at position P. This prevents the upper rail 2 from moving upward relative to the lower rail 1, thereby preventing rattling.

[0028] Gap H3 is not necessarily constant and may vary depending on factors such as dimensional variations among components. For example, FIG. 5B shows a case in which gap H3B, which is smaller (narrower in the vertical direction) than gap H3 shown in FIG. 5A, occurs. In this case, the pivot arm 32 is also biased clockwise in FIG. 5B (see arrow DR2), causing the sickle-shaped portion 32b to enter gap H3B. Since gap H3B is smaller than gap H3, sickle-shaped portion 32b abuts against the ceiling underside 12La at position P1, which is closer to the tip than position P of the outer surface 32b2. Meanwhile, the inner surface 32b1 of sickle-shaped portion 32b is coaxial with and has the same radius as the sliding portion 314 of the base 311, so they abut face-to-face. In this way, the slide structure SK effectively restricts rattle, i.e., upward movement of the upper rail 2 relative to the lower rail 1, regardless of the size of gap H3.

[0029] Next, the action of the resistance applying portion 3 in the front-rear movement of the upper rail 2 having the resistance applying portion 3 at the front end, i.e., the front-rear movement of the seat ST, will be described with reference to Figures 6A and 6B. Figure 6A shows the case where the seat ST is slid rearward in the state shown in Figure 5B, and Figure 6B shows the case where the seat ST is slid forward in the state shown in Figure 5B.

[0030] 6A, when the upper rail 2 slides rearward together with the resistance applying portion 3 (see arrow DR3), the sickle-shaped portion 32b of the rotating arm 32 slides rearward on the ceiling underside 12La, and a kinetic friction force is generated at position P1 due to the biasing force of the coil spring 34. Because this kinetic friction force is directed forward, it acts as a force that attenuates the clockwise torque T1 of the rotating arm 32, and a resistance force Fn1 against the movement is applied to position P1. 6B, when the upper rail 2 slides forward together with the resistance application portion 3 (see arrow DR4), the sickle-shaped portion 32b of the rotating arm 32 slides forward on the ceiling underside 12La, and a kinetic friction force is generated at position P1 due to the biasing force of the coil spring 34. Because this kinetic friction force is rearward, it acts as a force that adds to the clockwise torque T1 of the rotating arm 32, and pushes the sickle-shaped portion 32b of the rotating arm 32 as a wedge into the gap H3B between the ceiling underside 12La and the sliding portion 314L. Therefore, the resistance force applied at position P1 during the forward movement is resistance force Fn2, which is greater than the resistance force Fn1 during the backward movement.

[0031] For this reason, the force required to slide the seat ST backward is lighter and smaller than that required to slide the seat ST forward. In other words, with the sliding structure SK, movement of the seat ST toward the first end of the upper rail 2 where the resistance applying portion 3 is attached is heavy and the resistance is small and the movement of the seat ST toward the second end opposite to the end where the resistance applying portion 3 is attached is light.

[0032] The resistance applying portion 3 may be attached to the rear end of the upper rail 2, as in the second embodiment of the slide structure SK shown in Fig. 7. In this case, the resistance is smaller when moving the seat ST forward than when moving it backward, allowing for lighter movement.

[0033] So far, we have explained the relationship between one lower rail 1 and the upper rail 2 that engages with and slides on the lower rail 1, but in many vehicles, a pair of lower rails 1 are laid parallel to the floor FL, and the seat ST is provided with a pair of upper rails 2 that engage with the pair of lower rails 1. In this embodiment, if it is simply desired to exert different movement resistance between forward and backward movement, the resistance applying portion 3 may be attached to both of the pair of upper rails 2, or the resistance applying portion 3 may be attached to only one of the pair of upper rails 2.

[0034] In some cases, the pair of upper rails 2 of the seat ST are independently fixed to the seat frame and are not directly connected to each other as an integrated unit. In this case, it is desirable to attach a resistance applying portion 3 to both of the pair of upper rails 2 in order to completely prevent the upper rails 2 from rattling upward relative to the lower rails.

[0035] As shown in Fig. 8, some seats ST have a connecting frame 5 that directly connects each of a pair of upper rails 2. A seat cushion frame (not shown) is connected and positioned on top of this connecting frame 5 to form the seat ST. When the pair of upper rails 2 are connected together by the connecting frame 5, they move in unison in the left-right direction. For this reason, it is difficult to adopt a type in which the upper rails 2 roll with the rollers 22 automatically aligning in the left-right direction relative to the lower rails 1 as described above for both of the pair of lower rails 1.

[0036] Therefore, a sliding structure SKA may be considered in which the pivoting arm 32 of the resistance applying portion 3 also serves to position the upper rail 2 in the left-right direction in a seat ST having a connecting frame 5. This will be described with reference to FIGS. 9A to 9C. If the sliding structure in which the seat ST shown in FIG. 8 has a connecting frame 5 is referred to as the sliding structure SKA, FIG. 9A is a schematic front view of sliding structure SKA1, which is a first modified example of the sliding structure SKA. FIG. 9B is a schematic front view of sliding structure SKA2, which is a second modified example of the sliding structure SKA. FIG. 9C is a schematic front view of sliding structure SKA3, which is a third modified example of the sliding structure SKA. In each figure, the pivoting arm 32 is hatched for ease of understanding.

[0037] 9A shows a sliding structure SKA1 in which neither of the pair of lower rails 1 is self-aligning in the left-right direction. That is, each of the pair of lower rails 1 has a traveling rail portion 14b that extends horizontally in the left-right direction, and each of the pair of upper rails 2 has rollers 23 that roll on the upper surfaces of the traveling rail portions 14b. The left and right upper rails 2 are connected by a connecting frame 5 to form an integrated upper rail body 2T. In this configuration, rattles can occur in the upper rail body 2T in the left-right and up-down directions.

[0038] Therefore, the left rotating arm 321 of the left resistance applying part 3L is disposed in a vertical position so as to abut against the underside of the top wall 12 of the lower rail 1L, and the right rotating arm 322 is disposed in a horizontal position together with the sliding part 314 (not shown in FIG. 9A) so as to abut against the inner surface of the right side wall 11R of the lower rail 1L. On the other hand, the left rotating arm 323 of the right resistance applying part 3R is disposed in a vertical position so as to abut against the inner surface of the left side wall 11L of the lower rail 1R, and the right rotating arm 324 is disposed in a horizontal position together with the sliding part 314 (not shown) so as to abut against the underside of the top wall 12 of the lower rail 1R.

[0039] With the above-described configuration, in the sliding structure SKA1, upward movement of the upper rail body 2T is restricted by the pivoting arm 321 on the lower rail 1L, and by the pivoting arm 324 on the lower rail 1R. Furthermore, movement to the left is restricted by the pivoting arm 323, and movement to the right is restricted by the pivoting arm 322. This allows the upper rail body 2T in the sliding structure SKA1 to move in the front-to-rear direction without rattle relative to the pair of lower rails 1L, 1R.

[0040] (Variation 2) 9B shows a sliding structure SKA2 in which one of a pair of lower rails 1 (the left side in this example) is of a type that does not self-align, and the other (the left side) is of a type that self-aligns in the left-right direction, having an inclined traveling rail portion 14c and rollers 22 that make surface contact with it. In this configuration, the upper rail body 2T is prevented from wobbling in the left-right direction by the right lower rail 1R, but wobbling in the upward direction may occur.

[0041] Therefore, the left-side pivoting arm 325 of the left-side resistance applying portion 3L is abutted against the underside of the top wall portion 12 of the lower rail 1L, and the right-side pivoting arm 326 is positioned in a vertical position together with the sliding portion 314 (not shown in Figure 9B) so as to abut against the underside of the top wall portion 12 of the lower rail 1L.

[0042] With the above-described configuration, in the sliding structure SKA2, the upward movement of the upper rail body 2T is restricted by the pivoting arm 325 in the lower rail 1L and by the pivoting arm 326 in the lower rail 1R. This allows the upper rail body 2T in the sliding structure SKA2 to move in the front-to-rear direction without rattle relative to the pair of lower rails 1L, 1R.

[0043] (Variation 3) 9C shows a pair of lower rails 1 in which neither of them is self-aligning in the left-right direction. Furthermore, on the inner surface of one (the right in this example) lower rail 1R at the connection between the side wall 11L and the side wall 11R and the top wall 12, inclined guide portions 14cL, 14cR are formed, which extend upward toward the center. The resistance applying portion 3R has a left-side pivoting arm 328 that is inclined leftward as it extends upward and abuts against the left-side inclined guide portion 14cL, and a right-side pivoting arm 329 that is inclined in the opposite direction and abuts against the inclined guide portion 14cR. Furthermore, in the left-side lower rail 1L, the left-side pivoting arm 327 of the resistance applying portion 3L is in a vertical position so as to abut against the underside of the top wall 12 of the lower rail 1L.

[0044] In this configuration, left-right rattle is restricted by the rotating arms 328 and 329, and upward rattle is restricted by the rotating arms 327 and 328 and 329. As a result, in the slide structure SKA3, the upper rail body 2T moves in the front-rear direction without rattle relative to the pair of lower rails 1L and 1R.

[0045] The present invention is not limited to the above-described embodiment and procedure, and various modifications are possible without departing from the spirit and scope of the present invention.

[0046] The structure for attaching the resistance applying part 3 to the end of the rail base 21 of the upper rail 2 is not limited to the snap-fit structure described above. It may be fastened with screws or may be any other well-known attachment structure. In addition, the resistance applying part 3 may be detachable from the rail base 21 or may not be detachable.

[0047] The biasing member that biases the rotating arm 32 is not limited to a torsion coil spring such as the coil spring 34. Any coil spring, such as a tension coil spring or a compression coil spring, or other types of springs such as leaf springs, may be used. Furthermore, elastic materials other than springs, such as rubber, may also be used as the biasing member.

[0048] Vehicles refer to moving objects that carry people, including not only automobiles and trains, but also ships, aircraft, and other flying objects. Furthermore, the up, down, left, right, front and rear directions in the above description are defined for the convenience of explanation and do not limit the posture of the seat ST or the sliding direction of the sliding structure SK. [Explanation of symbols]

[0049] 1. Royal Rail 11,11L,11R Side wall part 12,12L,12R Ceiling wall section 12La,12Ra Ceiling bottom surface 12d gap 13 Bottom wall 14, 14L, 14R, 14b, 14c Running rail section 14cL, 14cR Inclined guide section 2 Upper Rail 2T upper rail body 21 Rail base 211 Base 212 Upper extension part 212a Through hole 213 Recess 213a Engagement part 214 Cavity 22,23 Laura 3,3L,3R Resistance applying part 31 Main body 31a Through hole 31b Seat part 311 Base 311a upper part 312 Guide piece 313 Engagement piece 313a Engagement part 314, 314L, 314R sliding parts 315 Pillar locking part 315a Through hole 315b Post section 315c Locking part 32, 32L, 32R, 321-329 Rotating arm 32a Extension 32b falcius 32b1 Inner surface 32b2 External surface 32c base 32c1 through hole 32d notch 33-pin 33a Circumferential groove 34 Coil spring 341, 341L, 341R Torso 343,343L,343R Arm 35 E-ring 36 clips 5 Connecting Frame 91 Seat cushion 92 seat back 93 Headrest CLV vertical plane CL3 axis d-spacing FL floor Fn1, Fn2 resistance H3,H3B gap P,P1 position SK, SKA, SKA1~SKA3 slide structure ST Vehicle seat (seat) T1 Torque V31,V space

Claims

1. a lower rail attached to the floor of a vehicle having a vehicle seat; an upper rail attached to a seat cushion of the vehicle seat and engaging with the lower rail to slide; a resistance applying portion attached to an end portion of the upper rail; Equipped with The resistance applying unit is a main body attached to the end portion; a rotating arm portion that rotates relative to the main body portion about an axis extending in the width direction of the lower rail and enters a gap between the main body portion and a top wall portion of the lower rail; a biasing member that biases the pivot arm in a direction of entering the gap; A sliding structure for a vehicle seat having the above structure.

2. 2. The vehicle seat sliding structure according to claim 1, wherein the rotating arm has a sickle-shaped portion formed in a sickle shape as a portion that enters the gap.

3. 3. The vehicle seat sliding structure according to claim 2, wherein when the upper rail slides relative to the lower rail, the sickle-shaped portion slides against the lower surface of the top wall portion while being biased by the biasing member.

4. 3. The vehicle seat sliding structure according to claim 2, wherein the sickle-shaped portion is plate-shaped and has a shape that widens from a tip side to a base side, and the larger the gap, the more it penetrates into the gap toward the base side.

5. A sliding structure for a vehicle seat as described in any one of claims 1 to 4, wherein the resistance applying portion is attached to a first end of the upper rail, and the resistance force when sliding the vehicle seat toward the first end is greater than the resistance force when sliding the vehicle seat to the opposite side of the first end.

Images