Slider

Abstract

To provide a slider that has enabled pressing force applied by a roller onto a lower rail to be increased while avoiding significant increase in size.SOLUTION: The slider comprises: a lower rail 21A including a pair of guide surfaces S1; an upper rail 21B; a holding pin 21C; a fixing roller 21D; an eccentric member 21E; an adjustment roller 21F; a lever 21G; and a biasing member 21H. A distance between an extension line of urging force of an urging member acting on the lever 21G and a rotation axis AX2 is longer than a distance between an extension line of pressing force of the adjustment roller 21F acting on the guide surface S1 and the rotation axis AX2.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a slider. [Background technology]

[0002] Conventionally, sliders capable of suppressing rattle of an upper rail relative to a lower rail have been known. For example, Japanese Patent Application Laid-Open Publication No. 2018-47777 discloses a vehicle seat slide device including a lower rail, an upper rail, and a guide portion that guides sliding of the upper rail relative to the lower rail. The lower rail has a pair of pressing surfaces that face each other in the vertical direction. The guide portion has a swing arm attached to the upper rail, rollers supported on both ends of the swing arm, and a spring that biases the swing arm to one side in the swing direction. As the swing arm is biased by the spring, one roller is pressed against the upper pressing surface of the lower rail, and the other roller is pressed against the lower pressing surface of the lower rail. The spring is held by a swing shaft of the swing arm. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-47777 Summary of the Invention [Problem to be solved by the invention]

[0004] In the vehicle seat slide device described in JP 2018-47777 A, a larger spring is required to increase the force with which the roller presses against the lower rail, making it difficult to place it between the lower rail and the upper rail, and achieving this arrangement would inevitably result in a significant increase in the size of the entire device.

[0005] An object of the present invention is to provide a slider that can increase the pressing force of the roller against the lower rail while avoiding a significant increase in size. [Means for solving the problem]

[0006] A slider according to one aspect of the present invention includes a lower rail that is open upward and has a shape that extends in one direction and includes a pair of guide surfaces that face each other; an upper rail that is movable along the lower rail; a retaining pin that is fixed to the upper rail and has a shape that extends in a direction perpendicular to both a direction that connects the pair of guide surfaces and a longitudinal direction of the lower rail; a fixing roller that is held by the retaining pin so as to be rotatable relative to the retaining pin; and an eccentric member that is held by the upper rail so as to be rotatable around a rotation axis that is parallel to a central axis of the retaining pin, the eccentric member passing through a position offset from the rotation axis and parallel to the rotation axis. the eccentric member including an eccentric outer peripheral surface around a center of eccentricity; an adjustment roller having an inner peripheral surface that slides against the eccentric outer peripheral surface and held by the eccentric member so as to be rotatable about the eccentric center relative to the eccentric member; a lever fixed to the eccentric member so as to rotate integrally with the eccentric member about the rotation axis; and a biasing member that biases the lever so that the eccentric member rotates about the rotation axis relative to the upper rail, wherein the distance between the extension line of the biasing force of the biasing member acting on the lever and the rotation axis is greater than the distance between the extension line of the pressing force of the adjustment roller acting on the guide surface and the rotation axis. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a slider that can increase the pressing force of the roller against the lower rail while avoiding a significant increase in size. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view of the swivel seat in a seated position. [Figure 2]FIG. 2 is a perspective view of the swivel seat in the entry / exit position. [Figure 3] 1 is a perspective view of a seat rotation device including a slider according to a first embodiment of the present invention in a seated position. [Figure 4] FIG. 2 is a perspective view of the seat rotation device in the entry / exit position. [Figure 5] FIG. [Figure 6] 10A and 10B are diagrams showing the positional relationship between a base plate, a rotating plate, and a connecting unit in a seating position and a getting-in / out position. [Figure 7] FIG. [Figure 8] FIG. 2 is an exploded perspective view of the main slider. [Figure 9] FIG. [Figure 10] FIG. 10 is a cross-sectional view taken along line XX in FIG. [Figure 11] FIG. 10 is a cross-sectional view taken along line XI-XI in FIG. [Figure 12] FIG. 10 is a cross-sectional view taken along line XII-XII in FIG. [Figure 13] 10 is a diagram showing the relationship between the distance between the rotation axis and the extension line of the biasing force of the biasing member acting on the lever, and the distance between the rotation axis and the extension line of the pressing force of the adjustment roller acting on the guide surface. [Figure 14] This shows a case where the width between the pair of guide surfaces is smaller than that shown in FIG. [Figure 15] This shows a case where the width between the pair of guide surfaces is larger than that shown in FIG. [Figure 16] FIG. [Figure 17] FIG. [Figure 18] FIG. 2 is a plan view of a sub-slider. [Figure 19] FIG. 19 is a cross-sectional view taken along line XIX-XIX in FIG. [Figure 20] FIG. 19 is a cross-sectional view taken along the line XX-XX in FIG. 18. [Figure 21]FIG. 19 is a cross-sectional view taken along line XXI-XXI in FIG. 18. [Figure 22] 10 is a diagram showing the relationship between the distance between the rotation axis and the extension line of the biasing force of the biasing member acting on the lever, and the distance between the rotation axis and the extension line of the pressing force of the adjustment roller acting on the guide surface. [Figure 23] This shows a case where the height between the pair of guide surfaces is greater than that shown in FIG. [Figure 24] This shows a case where the height between the pair of guide surfaces is smaller than that shown in FIG. [Figure 25] FIG. 10 is a perspective view of a modified slider. [Figure 26] FIG. 10 is an exploded perspective view of a modified slider. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the accompanying drawings, in which the same or corresponding components are designated by the same reference numerals.

[0010] Fig. 1 is a perspective view of a swivel seat in a seating position. Fig. 2 is a perspective view of the swivel seat in a boarding / exiting position. The swivel seat 1 functions as a vehicle seat, particularly as a car seat.

[0011] As shown in FIGS. 1 and 2, a swivel seat 1 of this embodiment includes a seat body 2 and a seat rotation device 10.

[0012] The seat body 2 has a seat cushion 2a and a seat back 2b. The seat cushion 2a forms a seat portion. The seat back 2b supports the back of an occupant seated on the seat cushion 2a. The seat body 2 is disposed on a floor FL of the vehicle.

[0013] A pair of seat sliders 3 are attached to the floor FL to slide the seat body 2 relative to the floor FL in the front-to-rear direction of the vehicle. The pair of seat sliders 3 are spaced apart in the width direction of the vehicle. Each seat slider 3 has a lower rail 3a and an upper rail 3b.

[0014] The lower rails 3a are fixed to the floor FL in a position parallel to the front-rear direction of the vehicle. The upper rails 3b are displaceable relative to the lower rails 3a in the front-rear direction of the vehicle (longitudinal direction of the lower rails 3a).

[0015] The seat rotation device 10 is capable of rotating the seat body 2 between a seating position (position shown in FIG. 1) and an entry / exit position (position shown in FIG. 2). The seating position is a position where the seat body 2 faces the front of the vehicle. The entry / exit position is a position where the seat body 2 faces the opening of the vehicle door. The seat rotation device 10 is fixed to the underside of the seat body 2.

[0016] Fig. 3 is a perspective view of the seat rotation device including the slider in the first embodiment of the present invention in the seating position, Fig. 4 is a perspective view of the seat rotation device in the getting-in / out position, and Fig. 5 is an exploded perspective view of the seat rotation device.

[0017] As shown in FIGS. 3 to 5, the seat rotation device 10 includes a base plate 100, a rotation plate 200, a connecting unit 300 including a slider 320, a drive unit 400, and a lock unit 500.

[0018] The base plate 100 is fixed to the floor FL of the vehicle directly or indirectly via another member. In this embodiment, the base plate 100 is fixed to the upper rail 3b. That is, the base plate 100 is fixed to the floor FL via the seat slider 3.

[0019] The rotating plate 200 is fixed to the underside of the seat body 2 so as not to rotate relative to the seat body 2. As shown in FIGS. 3 to 5, the rotating plate 200 has a pair of side brackets 210, a rear pipe 220, a front pipe 230, a connecting plate 240, and a striker 250.

[0020] The pair of side brackets 210 are arranged with a gap in the width direction. Each side bracket 210 is arranged above the seat slider 3. Each side bracket 210 has a shape that extends in the front-to-rear direction. Of the pair of side brackets 210, the side bracket 210 arranged on the left side in the width direction has a seat belt anchor (not shown) fixed to the rear portion thereof by a fixing bolt B.

[0021] The rear pipe 220 connects the rear portions of the pair of side brackets 210 together.

[0022] The front pipe 230 connects the front portions of the pair of side brackets 210 together.

[0023] The connecting plate 240 connects the rear pipe 220 and the front pipe 230 together.

[0024] 3 to 5, the striker 250 is fixed to the rear end of the connecting plate 240. The striker 250 is fixed to the connecting plate 240 in a state in which it straddles the inner end of the rear pipe 220 in the width direction.

[0025] The connecting unit 300 connects the base plate 100 and the rotating plate 200 so that the rotating plate 200 can rotate relative to the base plate 100 between the seating position and the getting-on / off position.

[0026] The connection unit 300 includes a rotation link 310 and a slider 320 .

[0027] The rotation link 310 connects the base plate 100 and the rotation plate 200. The rotation link 310 has a fixed end 311 (see FIG. 5) and a rotating end 312.

[0028] The fixed end 311 is formed at one end of the rotation link 310. The fixed end 311 is fixed to the base plate 100 so as to be rotatable relative to the base plate 100. Specifically, the fixed end 311 is fixed from the back side of the base plate 100 by a fastening member (such as a bolt). The fixed end 311 is rotatable around a fixed shaft portion 311a, which is the central axis of the fastening member.

[0029] The rotating end 312 is formed at the other end of the rotating link 310. The rotating end 312 is rotatable relative to the base plate 100 around the fixed shaft portion 311a of the fixed end 311 as the center of rotation, and is fixed to the rotating plate 200 so as to be rotatable relative to the rotating plate 200. Specifically, the rotating end 312 is fixed to the rotating plate 200 by a fastening member F2. The rotating plate 200 is rotatable relative to the rotating end 312 around the support shaft portion 312a, which is the central axis of the fastening member F2. Hereinafter, the portion of the rotating plate 200 supported by the support shaft portion 312a will be referred to as the "first supported portion 201" (see Figures 3 to 5).

[0030] The slider 320 includes a main slider 321 and a sub-slider 322 .

[0031] The main slider 321 includes a lower rail 21A and an upper rail 21B.

[0032] The lower rail 21A is fixed to the base plate 100. Specifically, the lower rail 21A is fixed to the center of the base plate 100. The lower rail 21A has a shape that extends linearly. The lower rail 21A has a shape that extends linearly along the diameter of an imaginary circle A1 (see FIG. 6) whose radius is twice the distance between the fixed shaft portion 311a at the fixed end portion 311 and the support shaft portion 312a at the rotating end portion 312 and whose center is the fixed shaft portion 311a. Note that in FIG. 6, the imaginary circle A1 and a circle A2 whose radius is the length between the fixed shaft portion 311a and the support shaft portion 312a and whose center is the support shaft portion 312a are indicated by dashed dotted lines, and the rotating plate 200 is indicated by a dashed two-dotted line. Also, a vehicle entrance / exit is provided at the top of FIG. 6.

[0033] 6, the lower rail 21A has a shape that extends linearly in a direction that intersects with the front-rear direction of the vehicle and along the diameter of an imaginary circle A1. The lower rail 21A is inclined with respect to the front-rear direction so as to gradually approach the door opening as it moves toward the front of the vehicle.

[0034] The upper rail 21B is movable along the lower rail 21A. The upper rail 21B has a shape that opens downward. The length of the upper rail 21B in a direction parallel to the longitudinal direction of the lower rail 21A is shorter than the length of the lower rail 21A in the same direction. A support shaft B1 is fixed to the upper surface of the upper rail 21B by welding or the like. The upper rail 21B supports the rotation plate 200 so that the rotation plate 200 is rotatable relative to the upper rail 21B. Specifically, the upper rail 21B supports the rotation plate 200 by the support shaft B1 and a fastening member F3. The rotation plate 200 is rotatable relative to the upper rail 21B around the support shaft B1, which is the central axis of the fastening member F3. Hereinafter, the portion of the rotation plate 200 supported by the support shaft B1 will be referred to as the "second supported portion 202" (see FIGS. 3 to 5).

[0035] The upper rail 21B moves the second supported portion 202 of the rotating plate 200 along the lower rail 21A while rotating it relative to the upper rail 21B in the same direction as the direction in which the rotating plate 200 rotates with respect to the rotating end portion 312 (clockwise in Figure 6) when the rotating plate 200 moves from the seating position to the boarding / exiting position.

[0036] When the seat body 2 moves between the seating position and the boarding / disembarking position, the support shaft portion B1 fixed to the upper rail 21B moves along the trajectory of a point on the circle A2 (the diameter of the imaginary circle A1) as the circle A2 rotates while being inscribed in the imaginary circle A1.

[0037] The sub-slider 322 includes a lower rail 22A and an upper rail 22B.

[0038] The lower rail 22A is fixed to the base plate 100. Specifically, the lower rail 22A is fixed to a portion of the base plate 100 located between the seat slider 3, which is arranged on the inner side in the width direction of the base plate 100, and the lower rail 21A of the main slider 321. The lower rail 22A has a shape that extends linearly. As shown in FIG. 6 , the lower rail 22A is fixed to the base plate 100 in an orientation such that an extension line of the lower rail 22A does not pass through the fixed shaft portion 311a, which is the center of the imaginary circle A1. The lower rail 22A is inclined with respect to the front-to-rear direction so as to gradually approach the door opening as it approaches the front of the vehicle.

[0039] The upper rail 22B is movable along the lower rail 22A. The upper rail 22B has a shape that opens downward. The length of the upper rail 22B in a direction parallel to the longitudinal direction of the lower rail 22A is shorter than the length of the lower rail 22A in the same direction. A support shaft B2 is fixed to the upper surface of the upper rail 22B by welding or the like. The upper rail 22B supports the rotation plate 200 so that the rotation plate 200 is rotatable relative to the upper rail 22B. Specifically, the upper rail 22B supports the rotation plate 200 via the support shaft B2 and a fastening member F4 (see FIG. 5). The rotation plate 200 is rotatable relative to the upper rail 22B around the support shaft B2, which is the central axis of the fastening member F4. Hereinafter, the portion of the rotation plate 200 supported by the support shaft B2 will be referred to as the "third supported portion."

[0040] The upper rail 22B moves the third supported portion of the rotating plate 200 along the lower rail 22A while rotating it relative to the upper rail 22B in the same direction as the direction in which the rotating plate 200 rotates with respect to the rotating end portion 312 (clockwise in Figure 6) when the rotating plate 200 moves from the seating position to the boarding / exiting position.

[0041] The drive unit 400 drives the connection unit 300. The drive unit 400 is fixed to the base plate 100. The drive unit 400 can rotate the rotation link 310 around the fixed end 311. The drive unit 400 includes a motor 410 and a gear 420 that transmits the output of the motor 410 to the rotation link 310.

[0042] For example, when the motor 410 is driven while the rotating plate 200 is in the seating position, the rotating link 310 rotates about the fixed end 311, and the upper rails 21B, 22B move forward along the lower rails 21A, 22A. As a result, the rotating plate 200 rotates toward the boarding / alighting opening while moving forward relative to the base plate 100. As a result, the rotating plate 200 is positioned at the boarding / alighting position.

[0043] The lock unit 500 locks the rotating plate 200 in the seated position. As shown in Fig. 5, the lock unit 500 is fixed to the base plate 100 by a fastening member F5. The lock unit 500 includes a locking device 510, a release actuator 520, and a transmission unit 530.

[0044] The locking device 510 can lock the striker 250. The locking device 510 includes a hook that is movable between a locked position and an unlocked position. The locked position is a position that holds the striker 250 in place when the rotating plate 200 is in the seated position. The unlocked position is a position that allows the striker 250 to be released.

[0045] The release actuator 520 is configured as a separate member from the locking device 510. The release actuator 520 is a device for releasing the lock of the striker 250 by the locking device 510.

[0046] The transmission unit 530 transmits the output of the release actuator 520 to the locking device 510. The transmission unit 530 includes a link mechanism.

[0047] Here, the main slider 321 and the sub-slider 322 will be described in detail with reference to Figures 7 to 24. First, the main slider 321 will be described with reference to Figures 7 to 15.

[0048] The main slider 321 further has a pair of retaining pins 21C, a pair of fixing rollers 21D, a pair of eccentric members 21E, a pair of adjustment rollers 21F, a pair of levers 21G, a biasing member 21H, a pair of horizontal pins 21J, and four vertical rollers 21K.

[0049] The lower rail 21A has a shape that opens upward and extends linearly in one direction. As shown in Fig. 7 and other figures, the lower rail 21A has a bottom wall a1, a pair of side walls a2, and a pair of flanges a3.

[0050] The bottom wall a1 is a portion that is fixed to the base plate 100. The bottom wall a1 has a shape that extends linearly.

[0051] The pair of side walls a2 face each other in the width direction (left-right direction in FIGS. 11 and 12) perpendicular to both the up-down direction and the longitudinal direction of the bottom wall a1. Each side wall a2 has a shape that stands upright from the outer end of the bottom wall a1 in the width direction. Each side wall a2 has a shape that extends along the longitudinal direction of the bottom wall a1. The inner surface of each side wall a2 is formed flat. The inner surface of each side wall a2 constitutes a guide surface S1. In other words, the pair of guide surfaces S1 face each other in the width direction.

[0052] Each flange a3 has a shape that protrudes inward in the width direction from the upper end of the side wall a2 and extends along the longitudinal direction of the bottom wall a1. The pair of flanges a3 face each other with a gap in the width direction. The gap between the pair of flanges a3 corresponds to the opening of the lower rail 21A. The lower surface of each flange a3 is formed flat.

[0053] Each retaining pin 21C is fixed to the upper rail 21B. The pair of retaining pins 21C are arranged at positions spaced apart from each other in the longitudinal direction of the upper rail 21B. Each retaining pin 21C has a shape that extends in a direction (vertical direction) perpendicular to both the direction connecting the pair of guide surfaces S1 and the longitudinal direction of the lower rail 21A. Each retaining pin 21C extends along the central axis AX1. Each retaining pin 21C is configured as a stepped bolt. Specifically, each retaining pin 21C has a first step portion c1 having a cylindrical outer peripheral surface and a second step portion c2 having an outer diameter smaller than the outer diameter of the first step portion c1. The tip of each retaining pin 21C is crimped to the upper rail 21B.

[0054] Each fixing roller 21D is held by a holding pin 21C so as to be rotatable relative to the holding pin 21C. As shown in Figures 10 and 12, each fixing roller 21D is held by a first step c1. Each fixing roller 21D rotates while contacting the guide surface S1.

[0055] Each eccentric member 21E is held by the upper rail 21B so as to be rotatable around a rotation axis AX2 parallel to the central axis AX1 of the holding pin 21C. In this embodiment, each eccentric member 21E is held by the holding pin 21C so as to be rotatable relative to the holding pin 21C. Specifically, each eccentric member 21E is held by the second step portion c2. That is, in the main slider 321, the rotation axis AX2 coincides with the central axis AX1.

[0056] Each eccentric member 21E has an insertion hole e1 and an eccentric outer peripheral surface e2.

[0057] The holding pin 21C is inserted through the insertion hole e1. The inner diameter of the insertion hole e1 is set to be substantially equal to the outer diameter of the second step portion c2 of the holding pin 21C.

[0058] The eccentric outer peripheral surface e2 is an outer peripheral surface around an eccentric center AX3 that passes through a position offset from the rotation axis AX2 and is parallel to the rotation axis AX2.

[0059] Each adjustment roller 21F is held by the eccentric member 21E so as to be rotatable relative to the eccentric member 21E around the eccentric center AX3. Each adjustment roller 21F is held by a holding pin 21C via the eccentric member 21E. Each adjustment roller 21F has an inner peripheral surface f1 that slides against the eccentric outer peripheral surface e2. The diameter of the inner peripheral surface f1 is set to be substantially equal to the diameter of the eccentric outer peripheral surface e2. Each adjustment roller 21F rotates while contacting the guide surface S1.

[0060] Each lever 21G is fixed to the eccentric member 21E so as to rotate integrally with the eccentric member 21E around the rotation axis AX2. Each lever 21G is welded to the upper surface of the eccentric member 21E. Each lever 21G has a shape that extends in a direction perpendicular to the rotation axis AX2.

[0061] The biasing member 21H biases the lever 21G so that the eccentric member 21E rotates relative to the upper rail 21B around the rotation axis AX2. The biasing member 21H connects the pair of levers 21G together. The biasing member 21H biases each of the pair of levers 21G in a direction in which the pair of levers 21G approach each other. For example, the biasing member 21H is formed of a tension coil spring.

[0062] The biasing member 21H biases (pulls) the pair of levers 21G, causing each eccentric member 21E to rotate together with the levers 21G about the rotation axis AX2 relative to the upper rail 21B. As a result, the eccentric outer peripheral surface e2 and the adjustment roller 21F held thereon also rotate about the rotation axis AX2 relative to the upper rail 21B, and the adjustment roller 21F is pressed against one of the pair of guide surfaces S1 (the left side in FIG. 11). This reaction force is then transmitted to the upper rail 21B via the eccentric member 21E, and the fixing roller 21D held by the upper rail 21B via the holding pin 21C is pressed against the other of the pair of guide surfaces S1 (the right side in FIG. 11).

[0063] This state is shown in Figure 13. As shown in Figure 13, the distance L1 between the rotation axis AX2 and an extension line of the biasing force F21 of the biasing member 21H acting on the lever 21G is greater than the distance L2 between the rotation axis AX2 and an extension line of the pressing force F22 of the adjustment roller 21F acting on the guide surface S1. Therefore, the pressing force F22 on the guide surface S1 by the adjustment roller 21F is greater than the biasing force F21 by the biasing member 21H.

[0064] Figure 14 shows a case where the width W1 between the pair of guide surfaces S1 is smaller than in the state shown in Figure 13. In this state, as indicated by arrow AR1, the distance between the pair of levers 21G becomes larger than in the state shown in Figure 13, while fixing roller 21D and adjustment roller 21F maintain contact with their respective guide surfaces S1. Note that in Figure 14, the guide surface S1 and the side wall a2 including it at the position shown in Figure 13 are indicated by two-dot chain lines.

[0065] Figure 15 shows a case where the width W2 between the pair of guide surfaces S1 is larger than in the state shown in Figure 13. In this state, as indicated by arrow AR1, the distance between the pair of levers 21G becomes smaller than in the state shown in Figure 13, while the fixing roller 21D and the adjustment roller 21F maintain contact with the respective guide surfaces S1. Note that in Figure 15, the guide surfaces S1 and the side walls a2 including them in the position shown in Figure 13 are indicated by two-dot chain lines.

[0066] Next, the sub-slider 322 will be described with reference to Figures 16 to 24. The sub-slider 322 further includes a pair of holding pins 22C, four fixing rollers 22D, an eccentric member 22E, a pair of adjustment rollers 22F, a lever 22G, and a biasing member 22H.

[0067] The lower rail 22A has a shape that opens upward and extends linearly in one direction. As shown in Figures 16, 17, etc., the configuration of the lower rail 22A is the same as the configuration of the lower rail 21A. The upper surface of the bottom wall a1 of the lower rail 22A, which faces the flange a3, is formed flat. This upper surface, together with the lower surface of the flange a3, forms a pair of guide surfaces S2. That is, the pair of guide surfaces S2 face each other in the vertical direction.

[0068] Each retaining pin 22C is fixed to the upper rail 22B. The pair of retaining pins 22C are arranged at positions spaced apart from each other in the longitudinal direction of the upper rail 22B. Each retaining pin 22C has a shape that extends in a direction (width direction) perpendicular to both the direction connecting the pair of guide surfaces S2 and the longitudinal direction of the lower rail 22A. Each retaining pin 22C extends along the central axis AX1. The upper rail 22B is provided with a retaining pin insertion hole b1 that holds each retaining pin 22C when inserted therethrough.

[0069] Each fixing roller 22D is held by the holding pin 22C so as to be rotatable relative to the holding pin 22C. As shown in Figures 16 and 17, each fixing roller 22D is disposed on the outer side of the upper rail 22B in the width direction. Each fixing roller 22D rotates while contacting the guide surface S2.

[0070] The eccentric member 22E is held by the upper rail 22B so as to be rotatable around a rotation axis AX2 parallel to the central axis AX1 of the holding pin 22C. The eccentric member 22E is disposed at a position spaced apart from the holding pin 22C. The upper rail 22B is provided with an eccentric member insertion hole b2 that holds the eccentric member 22E when the eccentric member 22E is inserted therethrough. The eccentric member insertion hole b2 is formed between the pair of holding pin insertion holes b1. That is, in the sub-slider 322, the rotation axis AX2 is spaced apart from the central axis AX1.

[0071] The eccentric member 22E has a main body e3 and a protruding eccentric portion e4.

[0072] The main body e3 rotates around the rotation axis AX2 and has a cylindrical shape with a part of the outer circumferential surface cut away by a plane parallel to the rotation axis AX2.

[0073] The protruding eccentric portion e4 protrudes outward in a direction parallel to the rotation axis AX2 from an end of the main body e3 in the direction parallel to the rotation axis AX2. The protruding eccentric portion e4 has an eccentric outer peripheral surface e2 that is an outer peripheral surface around the eccentric center AX3 formed at a position spaced from the rotation axis AX2.

[0074] Each adjustment roller 22F is held by the eccentric member 22E so as to be rotatable around the eccentric center AX3 relative to the eccentric member 22E. Specifically, each adjustment roller 22F is held by a protruding eccentric portion e4. As shown in FIG. 21, each adjustment roller 22F has an inner peripheral surface f1 that slides against the eccentric outer peripheral surface e2. The diameter of the inner peripheral surface f1 is set to be substantially equal to the diameter of the eccentric outer peripheral surface e2. Each adjustment roller 22F rotates while contacting the guide surface S2.

[0075] The lever 22G is fixed to the eccentric member 22E so as to rotate integrally with the eccentric member 22E around the rotation axis AX2. The lever 22G is disposed inside the upper rail 22B in the width direction. As shown in FIG. 17, the lever 22G is provided with a through hole g1 through which the main body e3 is inserted. The through hole g1 has a shape corresponding to the outer peripheral surface of the main body e3.

[0076] The biasing member 22H biases the lever 22G so that the eccentric member 22E rotates around the rotation axis AX2 relative to the upper rail 22B. The biasing member 22H is configured with a torsion spring. One end of the biasing member 22H is fixed to the upper rail 22B, and the other end of the biasing member 22H is fixed to the lever 22G.

[0077] As the biasing member 22H biases the lever 22G, the eccentric member 22E rotates together with the lever 22G around the rotation axis AX2 relative to the upper rail 22B. As a result, the eccentric outer peripheral surface e2 and each adjustment roller 22F held thereon also rotate around the rotation axis AX2 relative to the upper rail 22B, and as shown in Fig. 21, each adjustment roller 22F is pressed against one (the upper in this example) of the pair of guide surfaces S2. Then, the reaction force is transmitted to the upper rail 22B via the eccentric member 22E, and the fixing roller 22D held by the upper rail 22B via each holding pin 22C is pressed against the other (the lower in this example) of the pair of guide surfaces S2, as shown in Fig. 20.

[0078] This state is shown in Figure 22. As shown in Figure 22, the distance L1 between the rotation axis AX2 and an extension line of the biasing force F21 of the biasing member 22H acting on the lever 22G is greater than the distance L2 between the rotation axis AX2 and an extension line of the pressing force F22 of the adjustment roller 22F acting on the guide surface S2. Therefore, the pressing force F22 on the guide surface S2 by the adjustment roller 22F is greater than the biasing force F21 by the biasing member 22H.

[0079] Figure 23 shows a case where height H1 between the pair of guide surfaces S2 is greater than in the state shown in Figure 22. In this state, lever 22G rotates as shown by arrow AR3, thereby increasing the distance between the point of action of the biasing force of biasing member 22H of lever 22G and the lower guide surface S2 compared to the state shown in Figure 22, while maintaining contact of fixing roller 22D and adjustment roller 22F with each guide surface S2. Note that in Figure 23, guide surface S2 and flange a3 including it in the position shown in Figure 22 are indicated by two-dot chain lines.

[0080] Figure 24 shows a case where height H2 between the pair of guide surfaces S2 is smaller than in the state shown in Figure 22. In this state, lever 22G rotates as shown by arrow AR4, thereby reducing the distance between the point of action of the biasing force of biasing member 22H of lever 22G and the lower guide surface S2 compared to the state shown in Figure 22, while maintaining contact of fixing roller 22D and adjustment roller 22F with each guide surface S2. Note that in Figure 24, guide surface S2 and flange a3 including it in the position shown in Figure 22 are indicated by two-dot chain lines.

[0081] As described above, in the slider 320 of this embodiment, the adjustment rollers 21F, 22F rotate while contacting one of the pair of guide surfaces S1, S2, and the fixing rollers 21D, 22D rotate while contacting the other of the pair of guide surfaces S1, S2, thereby suppressing rattling of the upper rails 21B, 22B relative to the lower rails 21A, 22A.

[0082] Furthermore, since the distance L1 between the rotation axis AX2 and an extension line of the biasing force F21 of the biasing members 21H, 22H acting on the levers 21G, 22G is greater than the distance L2 between the rotation axis AX2 and an extension line of the pressing force F22 of the adjustment rollers 21F, 22F acting on the guide surfaces S1, S2, the pressing force F22 of the adjustment rollers 21F, 22F on the guide surfaces S1, S2 is greater than the biasing force F21 of the biasing members 21H, 22H. Therefore, it is possible to increase the pressing force F22 of the rollers 21D, 21F, 22D, 22F on the lower rails 21A, 22A while avoiding a significant increase in size.

[0083] In the above embodiment, at least one of the main slider 321 and the sub-slider 322 may be configured with a deformable slider 323 shown in Figures 25 and 26. The deformable slider 323 includes a lower rail 23A, an upper rail 23B, a pair of first retaining pins 23C1, a pair of second retaining pins 23C2, a pair of first fixing rollers 23D1, four second fixing rollers 23D2, a pair of first eccentric members 23E1, a second eccentric member 23E2, a pair of first adjustment rollers 23F1, a pair of second adjustment rollers 23F2, a pair of first levers 23G1, a second lever 23G2, a first biasing member 23H1, and a second biasing member 23H2.

[0084] The configuration of the lower rail 23A is the same as the configurations of the lower rails 21A and 22A.

[0085] The configuration of each first holding pin 23C1 is the same as the configuration of the holding pin 21C in the main slider 321. The configuration of each second holding pin 23C2 is the same as the configuration of the holding pin 22C in the sub-slider 322.

[0086] The configuration of each first fixing roller 23D1 is the same as the configuration of the fixing roller 21D in the main slider 321. The configuration of each second fixing roller 23D2 is the same as the configuration of the fixing roller 22D in the sub-slider 322.

[0087] The configuration of each first eccentric member 23E1 is the same as the configuration of the eccentric member 21E in the main slider 321. The configuration of the second eccentric member 23E2 is the same as the configuration of the eccentric member 22E in the sub-slider 322.

[0088] The configuration of each first adjustment roller 23F1 is the same as the configuration of the adjustment roller 21F in the main slider 321. The configuration of each second adjustment roller 23F2 is the same as the configuration of the adjustment roller 22F in the sub-slider 322.

[0089] The configuration of each first lever 23G1 is the same as the configuration of the lever 21G in the main slider 321. The configuration of each second lever 23G2 is the same as the configuration of the lever 22G in the sub-slider 322.

[0090] The configuration of the first biasing member 23H1 is the same as the configuration of the biasing member 21H in the main slider 321. The configuration of the second biasing member 23H2 is the same as the configuration of the biasing member 22H in the sub-slider 322.

[0091] The upper rail 23B has the structural features of the upper rail 21B in the main slider 321 and the structural features of the upper rail 22B in the sub-slider 322. Specifically, portions for fixing the first retaining pins 23C1 are provided at both ends of the upper rail 23B in the longitudinal direction of the upper rail 23B, and a retaining pin insertion hole b1 for holding the second retaining pins 23C2 when the second retaining pins 23C2 are inserted therethrough, and an eccentric member insertion hole b2 for holding the second eccentric member 23E2 when the second eccentric member 23E2 is inserted therethrough, are provided in the center of the upper rail 23B in the longitudinal direction of the upper rail 23B.

[0092] It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0093] (Aspect 1) a lower rail having an upwardly opening, extending in one direction, and including a pair of guide surfaces facing each other; an upper rail movable along the lower rail; a retaining pin fixed to the upper rail and having a shape extending in a direction perpendicular to both a direction connecting the pair of guide surfaces and a longitudinal direction of the lower rail; a fixing roller held by the holding pin so as to be rotatable relative to the holding pin; an eccentric member held by the upper rail so as to be rotatable about a rotation axis parallel to a central axis of the retaining pin, the eccentric member including an eccentric outer peripheral surface passing through a position offset from the rotation axis and about an eccentric center parallel to the rotation axis; an adjustment roller having an inner peripheral surface that slides against the eccentric outer peripheral surface and held by the eccentric member so as to be rotatable about the eccentric center relative to the eccentric member; a lever fixed to the eccentric member so as to rotate integrally with the eccentric member about the rotation axis; a biasing member that biases the lever so that the eccentric member rotates relative to the upper rail about the rotation axis, a slider, wherein the distance between the rotation axis and an extension line of the biasing force of the biasing member acting on the lever is greater than the distance between the rotation axis and an extension line of the pressing force of the adjustment roller acting on the guide surface.

[0094] In this slider, the biasing force of the biasing member causes the eccentric member and the lever to rotate relative to the upper rail about the rotation axis, causing the eccentric outer peripheral surface and the adjustment roller held thereon to also rotate relative to the upper rail about the rotation axis, pressing the adjustment roller against one of the pair of guide surfaces. This reaction force is then received by the upper rail, so that the fixing roller held on the upper rail via the retaining pin is pressed against the other of the pair of guide surfaces. This reduces rattling of the upper rail relative to the lower rail.

[0095] Furthermore, since the distance between the extension line of the biasing force of the biasing member acting on the lever and the rotation axis is greater than the distance between the extension line of the pressing force of the adjustment roller acting on the guide surface and the rotation axis, the pressing force of the adjustment roller on the guide surface is greater than the pressing force of the biasing member, making it possible to increase the pressing force of each roller on the lower rail while avoiding a significant increase in size.

[0096] (Aspect 2) 2. The slider according to aspect 1, wherein the eccentric member includes an insertion hole through which the retaining pin is inserted, and is held by the retaining pin so as to be rotatable relative to the retaining pin.

[0097] (Aspect 3) The upper rail is a holding pin insertion hole for holding the holding pin in an inserted state; an eccentric member insertion hole that holds the eccentric member in a state where the eccentric member is inserted therethrough, The eccentric member is a main body that rotates around the rotation axis; a protruding eccentric portion that protrudes outward in a direction parallel to the rotation axis from an end of the main body in the direction parallel to the rotation axis and has the eccentric outer peripheral surface, The lever is fixed to the main body, 2. The slider of claim 1, wherein the adjustment roller is held by the protruding eccentric portion.

[0098] It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered limiting. The scope of the present invention is defined by the claims rather than the description of the above embodiments, and further includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0099] 1 swivel seat, 2 seat body, 3 seat slider, 10 seat rotation device, 21A lower rail, 21B upper rail, 21C retaining pin, 21D fixing roller, 21E eccentric member, 21F adjusting roller, 21G lever, 21H biasing member, 21J horizontal pin, 21K vertical roller, 22A lower rail, 22B upper rail, 22C retaining pin, 22D fixing roller, 22E eccentric member, 22F adjusting roller, 22G lever, 22H biasing member, 100 base plate, 200 rotating plate, 210 side bracket, 220 rear pipe, 230 front pipe, 240 connecting plate, 250 striker, 300 connecting unit, 310 rotating link, 311 fixed end, 312 rotating end, 320 slider, 321 Main slider, 322 sub-slider, 323 deformation slider, 400 drive unit, 410 motor, 420 gear, 500 lock unit, 510 lock device, 520 release actuator, 530 transmission part, a1 bottom wall, A1 virtual circle, a2 side wall, A2 circle, a3 flange, b1 retaining pin insertion hole, B1 support shaft part, b2 eccentric member insertion hole, B2 support shaft part, e1 insertion hole, e2 eccentric outer peripheral surface, e3 main body, e4 protruding eccentric part, f1 inner peripheral surface, FL floor, g1 through hole, S1 guide surface, S2 guide surface.

Claims

1. a lower rail having an upwardly opening, extending in one direction, and including a pair of guide surfaces facing each other; an upper rail movable along the lower rail; a retaining pin fixed to the upper rail and having a shape extending in a direction perpendicular to both a direction connecting the pair of guide surfaces and a longitudinal direction of the lower rail; a fixing roller held by the holding pin so as to be rotatable relative to the holding pin; an eccentric member held by the upper rail so as to be rotatable about a rotation axis parallel to a central axis of the retaining pin, the eccentric member including an eccentric outer peripheral surface passing through a position offset from the rotation axis and about an eccentric center parallel to the rotation axis; an adjustment roller having an inner peripheral surface that slides against the eccentric outer peripheral surface and held by the eccentric member so as to be rotatable about the eccentric center relative to the eccentric member; a lever fixed to the eccentric member so as to rotate integrally with the eccentric member about the rotation axis; a biasing member that biases the lever so that the eccentric member rotates relative to the upper rail about the rotation axis, a slider, wherein the distance between the rotation axis and an extension line of the biasing force of the biasing member acting on the lever is greater than the distance between the rotation axis and an extension line of the pressing force of the adjustment roller acting on the guide surface.

2. 2. The slider according to claim 1, wherein the eccentric member includes an insertion hole through which the retaining pin is inserted, and is held by the retaining pin so as to be rotatable relative to the retaining pin.

3. The upper rail is a holding pin insertion hole for holding the holding pin in an inserted state; an eccentric member insertion hole that holds the eccentric member in a state where the eccentric member is inserted therethrough, The eccentric member is a main body that rotates around the rotation axis; a protruding eccentric portion that protrudes outward in a direction parallel to the rotation axis from an end of the main body in the direction parallel to the rotation axis and has the eccentric outer peripheral surface, The lever is fixed to the main body, 2. The slider according to claim 1, wherein the adjustment roller is held by the protruding eccentric portion.

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