Vehicle seats

Abstract

To provide a new mechanism for moving a vehicular seat.SOLUTION: A vehicular seat S comprises: a base part (a lower rail S5); a first movable part (a lower structure S4) that can move with respect to the base part; a second movable part (an interlock lever 40) that can move with respect to the first movable part; a lock member 50 mounted on the first movable part; and a lock releasing part (a lock releasing pin S52) provided in the base part. The second movable part can move to a first position, a second position shifted with respect to the first position, and a third position at the opposite side of the first position with respect to the second position. The lock member 50 can move to a lock position at which movement of the second movable part from the second position to the third position is locked, and to an unlock position at which movement of the second movable part from the second position to the third position is permitted. The lock releasing part contacts the lock member when the first movable part moves to a predetermined position with respect to the base part to move the lock member from the lock position to the unlock position.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a vehicle seat whose layout inside the vehicle can be changed.

Background Art

[0002] Conventionally, there is known a mechanism in which when the seat back is tilted forward, the slide lock mechanism is unlocked, and then when the seat is slid forward to the utmost position, the tumble lock mechanism is unlocked (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, it is required that the vehicle seat can be changed in various layouts. For example, if the seat back is locked in a state of being tilted forward to an intermediate position and then another operation, for example, the seat is slid, the tilting forward of the seat back locked at the intermediate position can be unlocked and further tilted forward, the variation of the layout change operation of the vehicle seat can be expanded.

[0005] Therefore, an object of the present invention is to provide a new mechanism for moving a vehicle seat.

[0006] Another object is to miniaturize the vehicle seat. Another object is to improve the reliability of the operation of the vehicle seat. Another object is to make it easier to visually confirm the operation of the vehicle seat.

Means for Solving the Problems

[0007] The present invention, which solves the aforementioned problems, is a vehicle seat having a seat cushion and a seat back, comprising: a base portion; a first movable portion movable relative to the base portion; a second movable portion movable relative to the first movable portion, the second movable portion being movable to a first position, a second position moved relative to the first position, and a third position opposite to the first position relative to the second position; a locking member attached to the first movable portion, the locking member being movable between a locked position in which the second movable portion engages with the second movable portion to lock the second movable portion from moving from the second position to the third position, and an unlocked position in which the engagement with the second movable portion is released to allow the second movable portion to move from the second position to the third position; and a lock release portion provided on the base portion, the lock release portion being in contact with the locking member when the first movable portion moves to a predetermined position relative to the base portion, and moving the locking member from the locked position to the unlocked position.

[0008] With this configuration, the second movable part moves from a first position to a second position relative to the first movable part, and is then held in the second position by the locking member. When the second movable part is in the second position, moving the first movable part to a predetermined position relative to the base part unlocks the locking member, allowing the second movable part to move from the second position to the third position.

[0009] The base portion may have a lower rail fixed to the floor of the vehicle, and the first movable portion may have an upper rail that is slidable relative to the lower rail, and to which a seat cushion is attached.

[0010] The locking member may be rotatably supported with respect to the first movable part.

[0011] The vehicle seat may further include a reclining device that switches the seat back between a state in which it can rotate relative to the seat cushion and a state in which it cannot rotate. In this case, the position of the locking member in the left-right direction may overlap with that of the reclining device.

[0012] This configuration allows for miniaturization of vehicle seats in the left-right direction.

[0013] The second movable part is a bracket that is rotatably mounted to the first movable part about a pivot axis, and may be configured to include a bracket having a flat plate portion perpendicular to the pivot axis and an extension portion extending from the flat plate portion in the direction in which the pivot axis extends, and a contact member fixed to the bracket in contact with the flat plate portion and the extension portion, and a contact member that can contact the locking member.

[0014] With this configuration, the rigidity of the portion of the second movable part that contacts the locking member can be increased, allowing the second movable part to be firmly locked in the second position.

[0015] The vehicle seat may further include a cover that covers the locking member from at least the left and right outer sides.

[0016] This configuration prevents debris from entering the area around the locking component, thereby improving the reliability of the vehicle seat's operation.

[0017] The contact portion of the locking member that abuts against the unlocking portion and the engaging portion that engages with the second movable portion may both be located outside the upper rail in the left-right direction.

[0018] With this configuration, the operation of the locking mechanism can be easily confirmed visually.

[0019] It is desirable that the contact width in the left-right direction when the locking member engages with the second movable part when it is in the locked position is greater than the contact width in the left-right direction when the locking member abuts against the unlocking part.

[0020] With this configuration, the second movable part can be securely fixed in the second position.

[0021] When the locking member is in the locked position, the contact portion where the locking member abuts against the unlocking portion may be located below the engaging portion that engages with the second movable portion.

[0022] According to such a configuration, it is possible to suppress the complication of the mechanism.

[0023] The position of the locking member in the vertical direction may overlap with the second movable portion. <(

[0024] According to such a configuration, the vehicle seat can be downsized in the vertical direction.

Effect of the Invention

[0025] According to the present invention, after the second movable portion moves from the first position to the second position with respect to the first movable portion, it is held at the second position by the locking member. When the first movable portion is moved to a predetermined position with respect to the base portion when the second movable portion is in the second position, the locking member is in the unlocked position, and the second movable portion can be moved from the second position to the third position.

[0026] Further, since the base portion has a lower rail and the first movable portion has an upper rail, by sliding the vehicle seat to a predetermined position by a sliding operation, an operation of expanding the movable range of the second movable portion in the second position can be realized.

[0027] Further, since the position of the locking member in the left - right direction overlaps with the reclining device, the vehicle seat can be downsized in the left - right direction.

[0028] Further, since the contact member is fixed to the bracket in a state of contacting the flat plate portion and the extending portion of the bracket, the rigidity of the portion of the second movable portion that abuts against the locking member can be increased, so that the second movable portion can be firmly stopped at the second position.

[0029] Furthermore, by providing a cover that encloses the locking member from at least the left and right outer sides, it is possible to suppress the entry of debris around the locking member and improve the reliability of the vehicle seat's operation.

[0030] Furthermore, since both the contact portion and the engaging portion of the locking member are located outside the upper rail in the left-right direction, the operation of the vehicle seat can be easily visually confirmed.

[0031] The contact width in the left-right direction when the locking member engages with the second movable part when it is in the locked position is greater than the contact width in the left-right direction when the locking member abuts against the unlocking part, thereby allowing the second movable part to be firmly stopped in the second position.

[0032] When the locking member is in the locked position, the contact portion of the locking member that abuts against the unlocking portion is located below the engaging portion that engages with the second movable portion, thereby preventing the mechanism from becoming overly complex.

[0033] The locking member's position in the vertical direction overlaps with that of the second movable part, allowing the vehicle seat to be made smaller in the vertical direction. [Brief explanation of the drawing]

[0034] [Figure 1] This is a perspective view showing a vehicle seat according to one embodiment of the present invention. [Figure 2] This is a perspective view showing the interlocking lever, locking member, and cover. [Figure 3] This is a perspective view showing the interlocking lever and locking member in a disassembled state. [Figure 4] This diagram shows the positional relationship between the locking member and the reclining device, etc. [Figure 5] This is a diagram showing the interlocking mechanism. [Figure 6] Figures (a) to (d) show the state of each component when the vehicle seat is in its initial state. [Figure 7]Figures (a) to (d) show the state of each component when the seat back moves from the seated position to the intermediate position. [Figure 8] Figures (a) to (d) show the state of each component when the locking component comes into contact with the unlocking pin by sliding the seat body forward. [Figure 9] Figures (a) to (d) show the state of each component when the locking member rotates to the unlocked position by sliding the seat body forward from the position shown in Figure 8. [Figure 10] Figures (a) to (d) show the state of each component when the interlocking lever moves from the second position to the third position. [Figure 11] Figures (a) to (d) show the state of each component when the seat back is returned from the storage position to the seating position. [Figure 12] Figures (a) to (d) show the state of each component when the modified vehicle seat is in its initial state. [Figure 13] Figures (a) to (d) show the state of each component when the seat body rotates from the seated position to the first forward-tilting position. [Figure 14] Figures (a) to (d) show the state of each component when the locking member comes into contact with the unlocking pin by sliding the modified sheet body forward. [Figure 15] Figures (a) to (d) show the state of each component when the locking member rotates to the unlocked position by sliding the seat body forward from the position shown in Figure 14. [Figure 16] Figures (a) to (d) show the state of each component when the interlocking lever moves from the second position to the third position. [Figure 17] Figures (a) to (d) show the state of each component when the seat body is returned from the second forward-tilting position to the seating position. [Figure 18] This diagram shows a latching mechanism, with (a) showing the latch in the engaged position and (b) showing the latch in the disengaged position. [Modes for carrying out the invention]

[0035] One embodiment of the present invention will be described below with reference to the drawings. As shown in Figure 1, the vehicle seat S is, for example, the second-row seat of a vehicle. The vehicle seat S includes a seat body S0, a reclining device R, left and right lower structures S4 as an example of a first movable part, and left and right lower rails S5 as an example of a base part. In this invention, the front-to-back, left-to-right, and up-and-down directions are based on the occupant sitting in the seat.

[0036] The seat body S0 comprises a seat cushion S1, a seat back S2, and a headrest S3. The seat back S2 is rotatably supported by the seat cushion S1. More specifically, the seat back S2 is rotatable between an upright seated position (position shown in Figure 6(a)) and a folded storage position (position shown in Figure 10(a)) where it overlaps with the seat cushion S1.

[0037] The reclining device R is a device that switches the seat back S2 between a state in which it can rotate relative to the seat cushion S1 and a state in which it cannot rotate. The reclining device R has a reclining spring R1 as a movable spring. The reclining spring R1 biases the seat back S2 from the seated position toward the stowed position.

[0038] The reclining device R includes a reclining locking member (not shown) for locking the seat back S2 in the seated position. A reclining release lever L1 for releasing the lock by the reclining locking member is provided on the upper part of the seat back S2. The reclining release lever may be provided on the side of the seat cushion S1, or on both the upper part of the seat back S2 and the side of the seat cushion S1.

[0039] The lower structure S4 is provided on the left and right sides of the underside of the seat cushion S1 so as to protrude from the underside of the seat cushion S1. The lower structure S4 comprises a base frame S41 connected to the seat cushion S1 and an upper rail S42 fixed to the lower end of the base frame S41. The upper rail S42 is slidable in the front-rear direction relative to the lower rail S5. The seat cushion S1 is attached to the upper rail S42 via the base frame S41.

[0040] The lower rail S5 supports the upper rail S42 so that it can move in the longitudinal direction. The lower rail S5 is fixed to the vehicle floor F (see Figure 6(a)).

[0041] The lower structure S4 is provided with a slide lock mechanism 10 and a simple lock mechanism 20. The slide lock mechanism 10 is a mechanism for prohibiting or allowing the sliding movement of the seat body S0 in the front-rear direction. The slide lock mechanism 10 is provided on each of the left and right lower structures S4.

[0042] As shown in Figure 6(b), the slide lock mechanism 10 includes a slide lock member 11 as a movable locking member. The slide lock member 11 is a member for locking or unlocking the sliding movement of the seat body S0. The slide lock member 11 is rotatably supported by the lower structure S4, and its rotatable hook-shaped tip 11A is capable of engaging with a hole S51 formed in the lower rail S5. The slide lock member 11 is rotatable between a movable lock position (position in Figure 6(b)) that locks the sliding movement of the seat body S0 and a release position (position in Figure 7(b)) that unlocks the seat body S0. The slide lock member 11 is biased from the release position toward the movable lock position by a spring (not shown).

[0043] Returning to Figure 1, the simple locking mechanism 20 is a mechanism that restricts the seat back S2 from moving from the intermediate position (position in Figure 7(a)), which is between the seated position and the stored position, to the stored position. The simple locking mechanism 20 is provided on the lower left structure S4.

[0044] As shown in Figures 6(a) and (d), the simple locking mechanism 20 includes an interlocking lever 40 as an example of a second movable part, and a locking member 50 for locking the movement of the interlocking lever 40. The interlocking lever 40 is a member that rotates in conjunction with the tilting of the seat back S2, and is connected to the seat back S2 via power transmission members (not shown) such as links, gears, and belts.

[0045] The interlocking lever 40 is rotatably mounted on the left and right outer sides of the lower structure S4, thereby allowing it to rotate relative to the lower structure S4. The interlocking lever 40 is rotatable to a first position P1, a second position P2 (see Figure 7(d)) ​​which is moved relative to the first position P1, and a third position P3 (see Figure 10(d)) which is on the opposite side of the second position P2 from the first position P1.

[0046] More specifically, the interlocking lever 40 is in the first position P1 when the seat back S2 is in the seated position. The interlocking lever 40 is in the second position P2 when the seat back S2 is in the intermediate position. The interlocking lever 40 is in the third position P3 when the seat back S2 is in the stowed position. Therefore, the aforementioned reclining spring R1 biases the interlocking lever 40 via the seat back S2 so that the interlocking lever 40 moves from the first position P1 to the third position P3.

[0047] The locking member 50 is rotatably mounted on the left and right outer sides of the lower structure S4. The locking member 50 is rotatable between a locked position (position 6(d) in Figure 6) in which the interlocking lever 40 engages, locking the interlocking lever 40 from moving from the second position P2 to the third position P3, and an unlocked position (position 10(d) in Figure 10) in which the engagement with the interlocking lever 40 is disengaged, allowing the interlocking lever 40 to move from the second position P2 to the third position P3. The locking member 50 is biased from the unlocked position to the locked position by a spring (not shown).

[0048] The lower rail S5 is provided with a lock release pin S52, which is an example of a lock release mechanism. The lock release pin S52 protrudes from the left and right outer sides of the lower rail S5 and is capable of contacting the lock member 50 in the front-rear direction. The lock release pin S52 has the function of contacting the lock member 50 when the lower structure S4 moves to a predetermined position forward of the lower rail S5, and rotating the lock member 50 from the locked position to the unlocked position.

[0049] As shown in Figure 2, the vehicle seat S further includes a cover C that covers the locking member 50 from at least the left and right outer sides. In this embodiment, the cover C is formed to cover the locking member 50 from the front, rear, left, right, top, and bottom outer sides.

[0050] As shown in Figure 3, the interlocking lever 40 has a lever body 41, a bracket 42, and a contact member 43. Each component (41-43) of the interlocking lever 40 is made of, for example, metal.

[0051] The lever body 41 is a long, plate-shaped member. The lever body 41 has a circular hole 41A at its lower end, which is rotatably supported by a projection provided on the lower structure S4. The lever body 41 is rotatably mounted on the lower structure S4 around a pivot axis X1.

[0052] The bracket 42 is joined to the lever body 41 by welding or the like. As a result, the bracket 42 is rotatably attached to the lower structure S4 via the lever body 41 and is rotatable relative to the lower structure S4 about a pivot axis X1 along the left-right direction.

[0053] The bracket 42 has a flat plate portion 42A perpendicular to the pivot axis X1 and an extension portion 42B extending from the flat plate portion 42A in the direction in which the pivot axis X1 extends. The flat plate portion 42A has a hole 42C that is concentric with the hole 41A of the lever body 41.

[0054] The extension portion 42B is formed to be bent outwards to the left and right from the flat plate portion 42A. The extension portion 42B is bent in an L-shape along the corner portion that forms part of the periphery of the flat plate portion 42A. Specifically, the extension portion 42B has a first wall B1 that contacts the front end of the contact member 43 and a second wall B2 that contacts the lower end of the contact member 43.

[0055] The contact member 43 is a member having a rear end portion 43A that can contact the locking member 50. The contact member 43 is fixed to the bracket 42 by welding or the like while in contact with the flat plate portion 42A and the extension portion 42B. A recess 43B is formed at the front end of the contact member 43 to avoid interference with the R-shaped portion (not shown) formed by bending the extension portion 42B from the flat plate portion 42A. This makes it possible to reliably bring the contact member 43 into contact with the flat plate portion 42A and the extension portion 42B.

[0056] The locking member 50 includes a rotating shaft 51 rotatably supported by the lower structure S4, a first plate 52 and a second plate 53 fixed to the rotating shaft 51 by welding or the like, a connecting shaft 54 ​​connecting the first plate 52 and the second plate 53, and an engaging portion 55 supported by the connecting shaft 54. Each of the components (51 to 55) constituting the locking member 50 is made of, for example, metal.

[0057] The rotating shaft 51 has a cylindrical first shaft portion 51A and a second shaft portion 51B, and a flange portion 51C that is larger in diameter than the first shaft portion 51A and the second shaft portion 51B. The first shaft portion 51A protrudes inward to the left and right from the flange portion 51C and is rotatably supported by the lower structure S4. The second shaft portion 51B protrudes outward to the left and right from the flange portion 51C.

[0058] The first plate 52 is a flat plate with a roughly V-shape that is perpendicular to the left-right direction. Specifically, the first plate 52 has a trapezoidal main body portion 52A that is long in the front-rear direction, and a contact portion 52B that extends downward from the rear part of the main body portion 52A. The front end of the contact portion 52B is capable of contacting the aforementioned lock release pin S52.

[0059] The main body 52A is formed in a trapezoidal shape, with the rear portion of its upper surface being a flat surface aligned in the front-to-back direction, and the front portion of its upper surface being an inclined surface that slopes diagonally downward and forward. The main body 52A has a hole H1 through which the second shaft portion 51B passes and a hole H2 through which the connecting shaft 54 ​​passes. Hole H1 is formed in the front corner of the upper part of the main body 52A. Hole H2 is formed in the front end of the main body 52A. The first plate 52 is fixed to the rotating shaft 51 by welding or the like, with the second shaft portion 51B inserted into hole H1 and in contact with the flange portion 51C.

[0060] The connecting shaft 54 ​​has a shaft portion 54A and a flange portion 54B which has a larger diameter than the shaft portion 54A. The shaft portion 54A protrudes outward to the left and right from the flange portion 54B. The connecting shaft 54 ​​is fixed to the first plate 52 by welding or the like, with the shaft portion 54A fitting into the hole H2 of the first plate 52 and the flange portion 54B in contact with the first plate 52.

[0061] The engaging portion 55 is a cylindrical member that engages with the contact member 43 of the interlocking lever 40. The engaging portion 55 is supported by the shaft portion 54A of the connecting shaft 54.

[0062] The second plate 53 has a first portion 53A that sandwiches the engaging portion 55 between itself and the first plate 52, and a second portion 53B that extends from the first portion 53A toward the first plate 52. The first portion 53A has a hole H3 that engages with a boss provided at the tip of the second shaft portion 51B, and a hole H4 that engages with a boss provided at the tip of the shaft portion 54A. The first portion 53A is joined to the respective shaft portions 51B and 54A by welding or the like with each boss and each hole H3 and H4 engaged.

[0063] The width in the left-right direction of the rear end portion 43A of the contact member 43 is greater than the width (plate thickness) in the left-right direction of the contact portion 52B. Also, the length in the left-right direction of the engaging portion 55 is greater than the width in the left-right direction of the rear end portion 43A of the contact member 43. As a result, as shown in Figure 4, the contact width WD1 in the left-right direction when the locking member 50 engages with the interlocking lever 40 when it is in the locked position is greater than the contact width WD2 in the left-right direction when the locking member 50 contacts the unlocking pin S52.

[0064] Furthermore, the position of the locking member 50 in the left-right direction overlaps with that of the reclining device R. Both the contact portion 52B and the engaging portion 55 of the locking member 50 are located outside the upper rail S42 in the left-right direction.

[0065] Furthermore, as shown in Figure 6(d), the locking member 50 is positioned in the vertical direction to overlap with the interlocking lever 40. When the locking member 50 is in the locked position, the contact portion 52B is located below the engaging portion 55.

[0066] As shown in Figure 1, an interlocking mechanism 30 is provided beneath the seat cushion S1 to link the movement of the seat back S2 with the movement of the slide lock mechanism 10. The interlocking mechanism 30 is configured such that when the seat back S2 rotates from the seated position to the intermediate position, it releases the slide lock mechanism 10 from the locked state, and when the seat back S2 rotates from the intermediate position to the stored position, it locks the slide lock mechanism 10 from the released state.

[0067] The interlocking mechanism 30 includes a first wire W1 as an example of a first connecting member, a second wire W2 as an example of a second connecting member, a third wire W3 as an example of a third connecting member, and a fourth wire W4. The components within the interlocking mechanism 30 and the interlocking lever 40 of the simple locking mechanism 20 are connected by the first wire W1 and the third wire W3. This makes it possible to transmit the force generated by the rotation of the seat back S2 to the interlocking mechanism 30.

[0068] The left and right slide lock mechanisms 10 are each connected to components within the interlocking mechanism 30 by a second wire W2. This makes it possible to transmit the force transmitted from the seat back S2 to the interlocking mechanism 30 to the left and right slide lock mechanisms 10.

[0069] The front end of the seat cushion S1 is provided with a slide lock release lever L2 for releasing the lock by the slide lock mechanism 10. The slide lock release lever L2 is connected to a component in the interlocking mechanism 30 by a fourth wire W4. This makes it possible to transmit the force applied to the slide lock release lever L2 to the left and right slide lock mechanisms 10.

[0070] As shown in Figure 5, the interlocking mechanism 30 comprises a mounting member 31, a first rotating member 32, a second rotating member 33, a swinging member 34, a holding member 35, a first spring 36, a second spring 37, a swinging spring 38, and a regulating spring 39. Each of the components (31-39) constituting the interlocking mechanism 30 is made of, for example, metal.

[0071] The mounting member 31 is a member that is attached to the lower structure S4. The mounting member 31 is formed into a box shape by bending the peripheral edge of a sheet metal.

[0072] The first rotating member 32 and the second rotating member 33 are rotatably mounted on the mounting member 31 so as to rotate around a common rotation axis X2. More specifically, the first rotating member 32 and the second rotating member 33 are rotatably supported by a cylindrical boss 31A provided on the mounting member 31.

[0073] The first rotating member 32 has a wire connecting portion 32A to which one end of the first wire W1 is connected. The other end of the first wire W1 is connected to the interlocking lever 40 described above (see Figure 6(d)). As a result, the first rotating member 32 can rotate in conjunction with the rotation of the interlocking lever 40 to a first rotation position corresponding to the first position P1 (position in Figure 6(c)), a second rotation position corresponding to the second position P2 (position in Figure 7(c)), and a third rotation position corresponding to the third position P3 (position in Figure 10(c)). In the following description, the rotation direction of the first rotating member 32 that is pulled and rotated by the first wire W1, that is, the clockwise rotation direction, will also be referred to as the first rotation direction, and the direction opposite to the first rotation direction will also be referred to as the second rotation direction.

[0074] The first rotating member 32 further has an engaging edge 32B that engages with the rocking member 34 and a restricting edge 32C that restricts the rotation of the holding member 35. The engaging edge 32B and the restricting edge 32C are formed as part of the periphery of the first rotating member 32.

[0075] The engaging edge 32B is located upstream of the rocking engaging portion 34A of the rocking member 34 in the first rotation direction, as described later. The engaging edge 32B is configured to engage with the rocking engaging portion 34A when the first rocking member 32 is in the range from the first rotation position to the second rotation position, and to disengage from the rocking engaging portion 34A during the process of the first rocking member 32 moving from the second rotation position to the third rotation position. As a result, the rocking member 34 engages with the engaging edge 32B of the first rocking member 32 when the interlocking lever 40 is in the range from the first position P1 to the second position P2, and disengages from the engaging edge 32B of the first rocking member 32 during the process of the interlocking lever 40 moving from the second position P2 to the third position P3.

[0076] The restricting edge 32C is formed in an arc shape centered on the rotation axis X2. The restricting edge 32C is configured to contact the pin 35A of the holding member 35 (described later) while the first rotating member 32 is moving from the first rotation position until it reaches the second rotation position, and to disengage from the pin 35A when the first rotating member 32 reaches the second rotation position.

[0077] The first rotating member 32 is biased in the second rotation direction by the first spring 36. In other words, the first spring 36 biases the first rotating member 32 in the opposite direction to the direction in which it receives force from the first wire W1. The mounting member 31 has a restricting wall 31B that restricts the first rotating member 32 from moving from the first rotation position in the second rotation direction.

[0078] The second rotating member 33 has a wire connecting portion 33A to which one end of each of the two second wires W2 is connected to one end of the fourth wire W4. The other end of each second wire W2 is connected to the left and right slide lock members 11 described above (see Figure 6(b)). The other end of the fourth wire W4 is connected to the slide lock release lever L2 described above (see Figure 1).

[0079] The second rotating member 33 further includes a restricting edge 33B that restricts the rotation of the holding member 35, and a contact edge 33C that can contact the holding member 35 in the rotational direction of the second rotating member 33. The restricting edge 33B and the contact edge 33C are formed as part of the periphery of the second rotating member 33.

[0080] The restricting edge 33B is formed in an arc shape centered on the rotation axis X2, and when projected in the direction along the rotation axis X2, it overlaps with the restricting edge 32C of the first rotating member 32. Similar to the restricting edge 32C of the first rotating member 32, the restricting edge 33B can contact or detach from the pin 35A of the holding member 35.

[0081] The contact edge 33C extends from the downstream end of the regulating edge 33B in the second rotational direction toward the rotation axis X2. The contact edge 33C contacts the pin 35A when the holding member 35 is in the regulating position (position shown in Figure 7(c)) described later.

[0082] The second rotating member 33 further has an arc-shaped hole 33D centered on the rotation axis X2. The mounting member 31 has a restricting projection 31C that fits into the hole 33D. When the second rotating member 33 is in the position shown in Figure 7 (the position corresponding to the second rotation position), the restricting projection 31C contacts the upstream end of the hole 33D in the first rotation direction, thereby restricting the second rotating member 33 from moving in the first rotation direction from the position shown in Figure 7. The mounting member 31 also has a restricting piece 31D that restricts the second rotating member 33 from moving in the second rotation direction from the position shown in Figure 5 (the position corresponding to the first rotation position).

[0083] The second rotating member 33 is biased in the second rotation direction by the second spring 37. In other words, the second spring 37 biases the second rotating member 33 in the direction that causes the first rotating member 32 to rotate due to the biasing force of the first spring 36.

[0084] The oscillating member 34 is pivotably mounted on the second rotating member 33 around the oscillation axis X3. The oscillating member 34 has an oscillating engagement portion 34A that engages with the engagement edge portion 32B of the first rotating member 32. The oscillating engagement portion 34A has a cylindrical surface that contacts the engagement edge portion 32B and is located upstream of the oscillation axis X3 in the first rotation direction. The oscillating engagement portion 34A is movable in the radial direction of the boss 31A by the oscillation of the oscillating member 34. The oscillating member 34 is biased by an oscillating spring 38 in the direction toward the rotation axis X2 with respect to the oscillating engagement portion 34A.

[0085] As described above, the configuration of the first rotating member 32, the second rotating member 33, and the oscillating member 34 allows switching between a state in which the first rotating member 32 and the second rotating member 33 rotate together in the first rotation direction, and a state in which the first rotating member 32 and the second rotating member 33 rotate independently. This enables the slide lock member 11 to move from the movable lock position to the released position, and then back to the movable lock position.

[0086] More specifically, as shown in Figures 6 to 7, when the interlocking lever 40 moves from the first position P1 to the second position P2, the engagement between the oscillating member 34 and the first rotating member 32 causes both the first rotating member 32 and the second rotating member 33 to rotate, moving the slide lock member 11 from the movable lock position to the released position. As shown in Figures 9 to 10, when the interlocking lever 40 moves from the second position P2 to the third position P3, the oscillating member 34 disengages from the first rotating member 32, allowing the first rotating member 32 and the second rotating member 33 to rotate independently, moving the slide lock member 11 from the released position to the movable lock position.

[0087] Furthermore, the torque applied by the reclining spring R1 to the first rotating member 32 via the interlocking lever 40, etc., is greater than the torque applied by the first spring 36 and the second spring 37 to the first rotating member 32. As a result, the first wire W1, which is pulled by the biasing force of the reclining spring R1, makes it possible to rotate the unit consisting of the first rotating member 32, the second rotating member 33, and the oscillating member 34 against the biasing forces of the first spring 36 and the second spring 37.

[0088] The retaining member 35 is a member that restricts the rotation of the second rotating member 33 in the second rotation direction when the first rotating member 32 is in the second rotation position, that is, when the interlocking lever 40 is in the second position P2, and holds the slide lock member 11 in the released position. The retaining member 35 is rotatably mounted on the mounting member 31 about the retaining axis X4.

[0089] The retaining member 35 has a pin 35A that can engage with the regulating edges 32C, 33B and the contact edge 33C. The pin 35A is movable radially to the boss 31A by the rotation of the retaining member 35.

[0090] The retaining member 35 is rotatable between an allowable position (position in Figure 5) that permits rotation of the second rotating member 33 in the second rotation direction and a restricting position (position in Figure 7(c)) that restricts rotation of the second rotating member 33 in the second rotation direction. The retaining member 35 is biased from the allowable position to the restricting position by a restricting spring 39.

[0091] The retaining member 35 is in the permissible position when the first rotating member 32 is in the first rotating position, that is, when the interlocking lever 40 is in the first position P1. When the retaining member 35 is in the permissible position, the pin 35A is in contact with the restricting edges 32C and 33B. This makes it possible for the restricting edges 32C and 33B to restrict the retaining member 35 from moving from the permissible position to the restricted position due to the biasing force of the restricting spring 39.

[0092] When the first rotating member 32 moves from the first rotating position to the second rotating position, that is, when the interlocking lever 40 moves from the first position P1 to the second position P2, the pin 35A of the holding member 35 disengages from the restricting edges 32C and 33B, causing it to rotate from the allowable position to the restricted position. When the holding member 35 is in the restricted position, the pin 35A is in contact with the contact edge 33C. This makes it possible for the pin 35A to restrict the movement of the second rotating member 33 in the second rotating direction due to the biasing force of the second spring 37.

[0093] The retaining member 35 further has a wire connecting portion 35B to which one end of the third wire W3 is connected. The other end of the third wire W3 is connected to the interlocking lever 40 described above (see Figure 6(d)). As a result, the retaining member 35 rotates against the biasing force of the regulating spring 39 in conjunction with the rotation of the interlocking lever 40.

[0094] The third wire W3 is connected to the holding member 35 and the interlocking lever 40 with greater play than the first wire W1 (see Figure 6(d)). As a result, when the interlocking lever 40 starts moving from the first position P1 to the third position P3, the first rotating member 32 connected to the interlocking lever 40 by the first wire W1 immediately starts to rotate, but the holding member 35 connected to the interlocking lever 40 by the third wire W3 does not rotate for a while, and only starts to rotate while the interlocking lever 40 is moving from the second position P2 to the third position P3.

[0095] In other words, the first wire W1 connects the first rotating member 32 to the interlocking lever 40 in both cases: when the interlocking lever 40 moves from the first position P1 to the second position P2, and when the interlocking lever 40 moves from the second position P2 to the third position P3. On the other hand, the third wire W3 does not connect the holding member 35 to the interlocking lever 40 when the interlocking lever 40 moves from the first position P1 to the second position P2, but connects the holding member 35 to the interlocking lever 40 when the interlocking lever 40 moves from the second position P2 to the third position P3.

[0096] Next, we will explain how to operate the vehicle seat S and the operation of each component when the vehicle seat S is folded and moved forward to widen the passenger compartment, and when the vehicle seat S that has been moved forward is returned to its initial state. In the initial state, the posture and position of the vehicle seat S and each component are as shown in Figure 6(a).

[0097] As shown in Figure 1, when the occupant operates the reclining release lever L1 to unlock the reclining device R, the seat back S2 rotates from the seated position to the intermediate position due to the biasing force of the reclining spring R1, as shown in Figures 6 and 7. In conjunction with this, the interlocking lever 40 rotates from the first position P1 to the second position P2. When the first wire W1 is pulled by the rotation of the interlocking lever 40, the first rotating member 32 rotates in the first rotation direction together with the second rotating member 33.

[0098] When the second rotating member 33 rotates in the first rotation direction, the second wire W2 is pulled by the second rotating member 33, and the slide lock member 11 moves from the movable lock position to the released position. When the interlocking lever 40 reaches the second position P2, the interlocking lever 40 engages with the lock member 50, and the rotation of the interlocking lever 40 is restricted. As a result, the interlocking lever 40 is held in the second position P2, and consequently the seat back S2 is held in the intermediate position, and the first rotating member 32 and the second rotating member 33 are held in the positions shown in Figure 7(c). Therefore, the slide lock member 11, which is being pulled by the second wire W2 connected to the second rotating member 33, is held in the released position.

[0099] Furthermore, when the interlocking lever 40 reaches the second position P2, the retaining member 35 disengages from the restricting edges 32C and 33B shown in Figure 5 and rotates from the allowable position to the restricted position. As a result, the retaining member 35 restricts the second rotating member 33 from rotating in the second rotation direction due to forces such as the second spring 37 and the spring biasing the slide lock member 11.

[0100] Subsequently, as shown in Figure 8, when the seat body S0 is slid forward, the locking member 50 comes into contact with the unlocking pin S52 at a predetermined position and rotates from the locked position to the unlocked position, as shown in Figure 9. This releases the lock on the interlocking lever 40.

[0101] When the lock on the interlocking lever 40 is released, the biasing force of the reclining spring R1 causes the seat back S2 to rotate from the intermediate position to the stored position, as shown in Figure 10, and the interlocking lever 40 rotates from the second position P2 to the third position P3.

[0102] When the interlocking lever 40 rotates from the second position P2 to the third position P3, the interlocking lever 40 pulls the first wire W1 and the third wire W3. When the first wire W1 is pulled, the first rotating member 32 rotates in the first rotation direction and moves from the second rotation position to the third rotation position. When the third wire W3 is pulled, the holding member 35 rotates from the restricted position to the permitted position. As a result, the second rotating member 33 becomes capable of rotating in the second rotation direction.

[0103] As the first rotating member 32 rotates from the second rotating position to the third rotating position, the oscillating member 34 disengages from the engaging edge 32B of the first rotating member 32, causing the second rotating member 33 to return to its initial position due to the biasing force of the second spring 37 (see Figure 5). This loosens the second wire W2, causing the slide lock member 11 to move from the released position back to the locked position. As a result, the vehicle seat S can be folded and moved forward to widen the interior space.

[0104] To return the vehicle seat S, which has been moved forward, to its initial position, the occupant raises the seatback S2, which has been tilted forward, and returns it to the seating position, as shown in Figure 11. When the seatback S2 is moved to the seating position, the reclining lock member of the reclining device R locks the seatback S2 in the seating position.

[0105] Furthermore, when the seat back S2 rotates from the storage position to the seated position, the interlocking lever 40 rotates in conjunction with this from the third position P3 to the first position P1. This loosens the first wire W1, causing the first rotating member 32 to rotate from the third rotation position to the first rotation position. When the first rotating member 32 returns to the first rotation position, the oscillating member 34 swings toward the rotation axis X2 due to the biasing force of the oscillating spring 38 and engages again with the engaging edge 32B (see Figure 5) of the first rotating member 32.

[0106] Furthermore, when the interlocking lever 40 rotates from the third position P3 to the first position P1, the third wire W3 is loosened, and the holding member 35 is pressed against the regulating edges 32C and 33B of the first rotating member 32 and the second rotating member 33 by the biasing force of the regulating spring 39. As a result, the interlocking mechanism 30 returns to its initial state.

[0107] Subsequently, the occupant can release the slide lock member 11 by operating the slide lock release lever L2 shown in Figure 1, and slide the seat body S0 backward, thereby returning the vehicle seat S to its initial state. When the occupant operates the slide lock release lever L2, the second pivot member 33 is rotated in the first pivot direction by the fourth wire W4, and the second pivot member 33 pulls the second wire W2, thereby releasing the lock on the slide lock member 11.

[0108] Based on the above, the following effects can be obtained in this embodiment. This provides a new mechanism for linking a slide lock member 11, which locks the sliding movement of the seat cushion S1 (lower structure S4), with a seat back S2 (interlocking lever 40), which moves relative to the seat cushion S1.

[0109] By configuring the first rotating member 32 and the second rotating member 33 to rotate around a common rotation axis X2, the interlocking mechanism 30 can be made smaller, and consequently the vehicle seat S can be made smaller, compared to a configuration in which, for example, the rotation axis of the first rotating member and the rotation axis of the second rotating member are located at different positions.

[0110] By restricting the rotation of the second rotating member 33 with the holding member 35, the slide lock member 11 can be held more reliably in the released position.

[0111] When the interlocking lever 40 moves from the first position to the second position, it is held in the second position by the locking member 50, so that the seat back S2 can be held in the intermediate position. When the interlocking lever 40 is in the second position, if the seat cushion S1 is moved to a predetermined position relative to the lower rail S5, the locking member 50 becomes the unlocked position, and the interlocking lever 40 moves from the second position to the third position, so that the seat cushion S1 can be moved from the intermediate position to the stored position.

[0112] By sliding the seat body S0 to a predetermined position, it is possible to achieve an action that widens the range of motion of the interlocking lever 40 located in the second position.

[0113] Since the position of the locking member 50 in the left-right direction overlaps with that of the reclining device R, the vehicle seat S can be made smaller in the left-right direction.

[0114] Since the contact member 43 is fixed to the bracket 42 while in contact with the flat plate portion 42A and the extended portion 42B, the rigidity of the portion of the interlocking lever 40 that contacts the locking member 50 can be increased, thereby providing a sense of rigidity in the operation of the vehicle seat S.

[0115] Since the locking member 50 is covered by the cover C, it is possible to prevent debris from entering around the locking member 50, thereby improving the reliability of the operation of the vehicle seat S.

[0116] Since the contact portion 52B and the engaging portion 55 of the locking member 50 are located to the left and right outward from the upper rail S42, the operation of the locking member 50 can be easily confirmed by visual inspection.

[0117] Since the contact width WD1 when the locking member 50 engages with the interlocking lever 40 in the locked position is larger than the contact width WD2 when the locking member 50 contacts the unlocking pin S52, the rigidity of the movement when the interlocking lever 40 is moved from the first position to the second position can be improved.

[0118] When the locking member 50 is in the locked position, the contact portion 52B is located below the engaging portion 55, which helps to prevent the mechanism from becoming overly complex.

[0119] Since the vertical position of the locking member 50 overlaps with that of the interlocking lever 40, the vehicle seat S can be made smaller in the vertical direction.

[0120] The present invention is not limited to the embodiments described above, and can be used in various forms as illustrated below.

[0121] In the above embodiment, a single locking member 50 is configured to have a contact portion 52B and an engaging portion 55. However, the present invention is not limited thereto. For example, a mechanism in which a first member having a contact portion and a second member having an engaging portion are interlocked by a link mechanism or the like may be used as the locking member.

[0122] The first movable part may rotate, not just slide relative to the base. For example, the seat body, which is the first movable part, may rotate about a vertical axis relative to the lower rail, which is the base.

[0123] The second movable part may slide, not just rotate relative to the first movable part.

[0124] The base portion is not limited to the lower rail, but may be other members fixed to the lower rail, for example. Also, the base portion is not limited to being fixed to the floor of the vehicle. The base portion may be a seat cushion, the first movable part may be a seat back, and the second movable part may be a member that rotates relative to the seat back, for example, an armrest.

[0125] In the above embodiment, a reclining lock member was exemplified as the second locking member capable of locking the second movable part to the first position. However, the present invention is not limited thereto, and any member capable of locking the second movable part to the first position may be used.

[0126] In the above embodiment, a holding member is provided to hold the second rotating member in a position corresponding to the second rotation position. However, if the engagement between the oscillating member and the first rotating member is maintained when the first rotating member is in the second rotation position, the holding member may not be necessary.

[0127] The connecting member is not limited to a wire; it may also be a rod, for example.

[0128] In the above embodiment, the interlocking lever 40 was linked to the tilting of the seat back S2, but the present invention is not limited thereto. For example, as shown in Figures 12 to 16, if the entire seat body S0 tilts, the interlocking lever 40 may be linked to the tilting of the seat body S0.

[0129] Specifically, in the configuration shown in Figure 12, the seat cushion S1 is rotatably supported by the lower structure S4 around a pivot axis X5 along the left-right direction. The seat body S0 is rotatable between the seated position shown in Figure 12, the first forward-tilting position shown in Figure 13, and the second forward-tilting position shown in Figure 16. In the seated position, the seat surface of the seat cushion S1 is approximately horizontal. The first forward-tilting position is a position where the seat cushion S1 is tilted further forward than the seated position. The second forward-tilting position is a position where the seat cushion S1 is tilted further forward than the first forward-tilting position. The seat body S0 is biased from the seated position towards the second forward-tilting position by a spring (not shown).

[0130] The seat cushion S1 is equipped with a latch device 60 for locking the seat body S0 in the seated position. The latch device 60 locks or unlocks the seat body S0 relative to the lower structure S4 by engaging with or disengaging from a striker 70 provided on the lower structure S4. The striker 70 can be, for example, a rod-shaped member connecting the left and right frames of the lower structure S4.

[0131] As shown in Figure 18, the latch device 60 comprises a housing 61 fixed to the seat cushion S1 and a latch 62 rotatably supported by the housing 61. The housing 61 has an entry groove 61A into which the striker 70 can enter. The latch 62 is rotatable between the engaged position shown in Figure 18(a) and the disengaged position shown in Figure 18(b).

[0132] When the latch 62 is in the engaged position, it engages with the striker 70. When the latch 62 is in the disengaged position, it disengages from the striker 70. The latch 62 is biased from the disengaged position to the engaged position by a spring (not shown).

[0133] Returning to Figure 12, a latch release lever L11 for releasing the lock by the latch 62 is provided at the top of the seat back S2. The latch release lever L11 and the latch 62 are connected by a wire W11.

[0134] The interlocking lever 40 according to this embodiment is configured to rotate in conjunction with the rotation of the seat body S0. Specifically, the interlocking lever 40 is connected to the seat body S0 via power transmission members (not shown) such as links, gears, and belts.

[0135] The interlocking lever 40 is in the first position P1 when the seat body S0 is in the seated position. The interlocking lever 40 is in the second position P2 when the seat body S0 is in the first forward tilt position (see Figure 13). The interlocking lever 40 is in the third position P3 when the seat body S0 is in the second forward tilt position (see Figure 16).

[0136] Next, we will explain the operation method of the vehicle seat S and the operation of each component when the seat body S0, which has been tilted forward to the second forward tilt position, is moved forward to widen the passenger compartment space, and when the seat body S0, which has been moved forward, is returned to its initial state. In the initial state, the posture and position of the seat body S0 and each component are as shown in Figure 12(a).

[0137] As shown in Figures 12(a) and 13(a), when the occupant operates the latch release lever L11 to release the latch device 60, the seat body S0 rotates from the seated position to the first forward-tilting position due to the biasing force of a spring (not shown), and in conjunction with this, the interlocking lever 40 rotates from the first position P1 to the second position P2. When the first wire W1 is pulled by the rotation of the interlocking lever 40, the first rotating member 32 rotates in the first rotation direction together with the second rotating member 33.

[0138] When the second rotating member 33 rotates in the first rotation direction, the second wire W2 is pulled by the second rotating member 33, and the slide lock member 11 moves from the movable lock position to the released position. When the interlocking lever 40 reaches the second position P2, the interlocking lever 40 engages with the lock member 50, and the rotation of the interlocking lever 40 is restricted. As a result, the interlocking lever 40 is held in the second position P2, and consequently the seat body S0 is held in the first forward tilt position, and the first rotating member 32 and the second rotating member 33 are held in the positions shown in Figure 13(c). Therefore, the slide lock member 11, which is being pulled by the second wire W2 connected to the second rotating member 33, is held in the released position.

[0139] Furthermore, when the interlocking lever 40 reaches the second position P2, the holding member 35 rotates from the permissible position to the restricted position. As a result, the holding member 35 restricts the rotation of the second rotating member 33 in the second rotation direction.

[0140] Subsequently, as shown in Figure 14, when the seat body S0 is slid forward, the locking member 50 comes into contact with the unlocking pin S52 at a predetermined position and rotates from the locked position to the unlocked position, as shown in Figure 15. This releases the lock on the interlocking lever 40.

[0141] When the lock on the interlocking lever 40 is released, as shown in Figure 16, the seat body S0 rotates from the first forward tilt position to the second forward tilt position due to the biasing force of a spring (not shown), and the interlocking lever 40 rotates from the second position P2 to the third position P3.

[0142] When the interlocking lever 40 rotates from the second position P2 to the third position P3, the interlocking lever 40 pulls the first wire W1 and the third wire W3. When the first wire W1 is pulled, the first rotating member 32 rotates in the first rotation direction and moves from the second rotation position to the third rotation position. When the third wire W3 is pulled, the holding member 35 rotates from the restricted position to the permitted position. As a result, the second rotating member 33 becomes capable of rotating in the second rotation direction.

[0143] As the first rotating member 32 rotates from the second rotating position to the third rotating position, the oscillating member 34 disengages from the engaging edge 32B of the first rotating member 32, causing the second rotating member 33 to return to its initial position due to the biasing force of the second spring 37 (see Figure 5). This loosens the second wire W2, causing the slide lock member 11 to move from the released position back to the locked position. As a result, the seat body S0, which has been tilted forward to the second forward tilt position, can be moved forward, thereby widening the passenger compartment space.

[0144] To return the seat body S0, which has been moved forward, to its initial position, the occupant rotates the seat body S0 from the second forward-tilted position back to the seated position, as shown in Figure 17. When the seat body S0 is moved to the seated position, the latch device 60 engages with the striker 70, locking the seat body S0 in the seated position.

[0145] Furthermore, when the seat body S0 rotates from the second forward-tilting position to the seated position, the interlocking lever 40 rotates in conjunction with this from the third position P3 to the first position P1. This loosens the first wire W1, causing the first rotating member 32 to rotate from the third rotation position to the first rotation position. When the first rotating member 32 returns to the first rotation position, the oscillating member 34 swings toward the rotation axis X2 due to the biasing force of the oscillating spring 38 and engages again with the engaging edge 32B (see Figure 5) of the first rotating member 32.

[0146] Furthermore, when the interlocking lever 40 rotates from the third position P3 to the first position P1, the third wire W3 is loosened, and the holding member 35 is pressed against the regulating edges 32C, 33B (see Figure 5) of the first rotating member 32 and the second rotating member 33 by the biasing force of the regulating spring 39. As a result, the interlocking mechanism 30 returns to its initial state.

[0147] Subsequently, the occupant can release the slide lock member 11 by operating the slide lock release lever L2 shown in Figure 1, and slide the seat body S0 backward, thereby returning the vehicle seat S to its initial state.

[0148] The elements described in the above embodiments and modifications may be implemented in any combination. [Explanation of symbols]

[0149] 40 Interlocking lever 50 Locking member S Vehicle Seat S1 Seat Cushion S2 Seatback S4 Lower Structure S5 Lower Rail S52 Release Pin

Claims

1. A vehicle seat having a seat cushion and a seat back, Reclining device and The base part, A first movable part that is movable relative to the base part, A second movable part that is movable relative to the first movable part, the second movable part being movable between a first position, a second position moved relative to the first position, and a third position opposite to the first position relative to the second position, A locking member attached to the first movable part, which is movable between a locked position in which the second movable part engages with the locking member to prevent the second movable part from moving from the second position to the third position, and an unlocked position in which the locking member disengages from the second movable part to allow the second movable part to move from the second position to the third position. A lock release unit provided on the base portion, which contacts the lock member when the first movable portion moves to a predetermined position relative to the base portion, and moves the lock member from the locked position to the unlocked position, Equipped with, The base portion has a lower rail that is fixed to the floor of the vehicle, The first movable part is an upper rail that is slidable relative to the lower rail, and has an upper rail to which the seat cushion is attached. A vehicle seat characterized in that the second movable part is provided on the first movable part separately from the seat back.

2. A vehicle seat having a seat cushion and a seat back, The base part, A first movable part that is movable relative to the base part, A second movable part that is movable relative to the first movable part, the second movable part being movable between a first position, a second position moved relative to the first position, and a third position opposite to the first position relative to the second position, A locking member attached to the first movable part, which is movable between a locked position in which the second movable part engages with the locking member to prevent the second movable part from moving from the second position to the third position, and an unlocked position in which the locking member disengages from the second movable part to allow the second movable part to move from the second position to the third position. A lock release unit provided on the base portion, which contacts the lock member when the first movable portion moves to a predetermined position relative to the base portion, and moves the lock member from the locked position to the unlocked position, Equipped with, The base portion has a lower rail that is fixed to the floor of the vehicle, The first movable part is an upper rail that is slidable relative to the lower rail, and has an upper rail to which the seat cushion is attached. The seat cushion is rotatable relative to the first movable part, The vehicle seat is characterized in that the second movable part is linked to the rotation of the seat cushion.

3. The seat cushion is rotatable relative to the first movable part, The vehicle seat according to claim 1, characterized in that the second movable part is linked to the rotation of the seat cushion.

4. The vehicle seat according to claim 1 or 2, further comprising a mechanism configured to release the lock of the upper rail slide when the second movable part is in the second position, and to lock the slide in conjunction with the rotation of the second movable part from the second position to the third position.

5. The locking member is An engaging portion that engages with the second movable portion described above, The first plate and, A vehicle seat according to claim 1 or 2, further comprising a second plate that sandwiches the engaging portion between itself and the first plate.

6. The second movable part is, A bracket rotatably mounted to the first movable part about a pivot axis, the bracket having a flat plate portion perpendicular to the pivot axis and an extension portion extending from the flat plate portion in the direction in which the pivot axis extends, The vehicle seat according to claim 1 or 2, characterized in that it comprises a contact member fixed to the bracket in contact with the flat plate portion and the extension portion, and having a contact member that can come into contact with the locking member.

7. The vehicle seat according to claim 1 or 2, characterized in that the contact width in the left-right direction when the locking member engages with the second movable part when the locking member is in the locked position is greater than the contact width in the left-right direction when the locking member abuts the unlocking part.

8. The vehicle seat according to claim 1 or 2, characterized in that when the locking member is in the locked position, the contact portion that the locking member contacts the unlocking portion is located behind the engaging portion that engages with the second movable portion.

9. The vehicle seat according to claim 6, characterized in that the contact member has a recess formed to avoid interference with the R-shaped portion formed by bending the extended portion from the flat plate portion.

10. A vehicle seat having a seat cushion and a seat back, The base part, A first movable part that can move in the front-rear direction relative to the base part, A second movable part that is movable relative to the first movable part, the second movable part being movable between a first position, a second position moved relative to the first position, and a third position opposite to the first position relative to the second position, and the second movable part being displaceable sequentially from the first position to the second position and the third position as the upper end of the seat back moves forward relative to the first movable part, A locking member attached to the first movable part, which is movable between a locked position in which the second movable part engages with the locking member to prevent the second movable part from moving from the second position to the third position, and an unlocked position in which the locking member disengages from the second movable part to allow the second movable part to move from the second position to the third position. A lock release unit provided on the base portion, which contacts the lock member when the first movable portion moves forward to a predetermined position relative to the base portion, and moves the lock member from the locked position to the unlocked position, A vehicle seat characterized by having the following features.

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