JP2023004906A - Vehicular seat - Google Patents

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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat capable of changing the layout inside the vehicle.

Conventionally, a mechanism is known in which the slide lock mechanism is unlocked when the seat back is tilted forward, and the tumble lock mechanism is unlocked when the seat is slid all the way forward (Patent Document 1).

JP-A-2000-94996

By the way, vehicle seats are required to be able to change various layouts. For example, the seat back is locked in a state where it is tilted forward halfway, and then another operation such as sliding of the seat is performed to unlock the forward tilt of the seat back locked at the halfway position. If the seat can be tilted further forward, the variation of the layout changing operation of the vehicle seat can be expanded.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a new mechanism for moving a vehicle seat.

Another object of the present invention is to reduce the size of the vehicle seat.
Another object of the present invention is to improve the reliability of the operation of the vehicle seat.
Another object of the present invention is to facilitate visual confirmation of the operation of the vehicle seat.

The present invention for solving the aforementioned problems is a vehicle seat having a seat cushion and a seat back, comprising: a base portion; a first movable portion movable with respect to the base portion; A possible second movable portion movable to a first position, a second position moved with respect to the first position, and a third position opposite the first position with respect to the second position A second movable part and a locking member attached to the first movable part, the second movable part being engaged to lock the second movable part from moving from the second position to the third position. a locking member movable between a locking position and an unlocking position allowing the second movable part to move from the second position to the third position by disengagement from the second movable part; and a base part. a lock release portion provided in the first movable portion that contacts the lock member when the first movable portion moves to a predetermined position with respect to the base portion, and moves the lock member from the lock position to the unlock position; , provided.

According to such a configuration, the second movable portion is held at the second position by the lock member after moving from the first position to the second position with respect to the first movable portion. When the first movable portion is moved to a predetermined position with respect to the base portion when the second movable portion is at the second position, the lock member is moved to the unlock position, and the second movable portion is moved from the second position to the second position. It can be moved to 3 positions.

The base part has a lower rail that is fixed to the floor of the vehicle, the first movable part is an upper rail that is slidable with respect to the lower rail, and the seat cushion is attached to the upper rail. good.

The lock member may be rotatably supported with respect to the first movable portion.

The vehicle seat may further include a reclining device that switches the seat back between a rotatable state and a non-rotatable state with respect to the seat cushion. In this case, the position of the lock member in the left-right direction may overlap with the reclining device.

According to such a configuration, it is possible to reduce the size of the vehicle seat in the left-right direction.

The second movable part is a bracket attached to the first movable part so as to be rotatable about the rotation axis, and comprises a flat plate part orthogonal to the rotation axis and a rotation axis extending from the flat plate part. and a contact member fixed to the bracket in contact with the flat plate portion and the extension portion, the contact member being capable of contacting the lock member. may be configured.

With such a configuration, the rigidity of the portion of the second movable portion that abuts on the lock member can be increased, so that the second movable portion can be firmly fixed at the second position.

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

According to such a configuration, it is possible to prevent dust from entering around the locking member, and to improve the reliability of the operation of the vehicle seat.

Both the abutting portion where the lock member abuts against the unlocking portion and the engaging portion where the second movable portion engages may be positioned outside the upper rail in the left-right direction.

With such a configuration, it is easy to visually confirm the operation of the locking member.

It is desirable that the width of contact in the lateral direction when the lock member engages with the second movable portion in the lock position is larger than the width of contact in the lateral direction when the lock member contacts the unlocking portion. .

According to such a configuration, the second movable portion can be firmly fixed at the second position.

When the lock member is in the lock position, the abutting portion of the lock member that abuts the unlocking portion may be positioned below the engaging portion that engages with the second movable portion.

According to such a configuration, it is possible to prevent the mechanism from becoming complicated.

The lock member may overlap the second movable portion in the vertical direction.

According to such a configuration, the vehicle seat can be made smaller in the vertical direction.

According to the present invention, the second movable portion is held at the second position by the lock member after moving from the first position to the second position with respect to the first movable portion. When the first movable portion is moved to a predetermined position with respect to the base portion when the second movable portion is at the second position, the lock member is moved to the unlock position, and the second movable portion is moved from the second position to the second position. It can be moved to 3 positions.

Further, since the base portion has the lower rails and the first movable portion has the upper rails, the vehicle seat is slid to a predetermined position by the sliding operation, thereby increasing the movable range of the second movable portion at the second position. can be realized.

In addition, the position of the lock member in the left-right direction overlaps with the reclining device, so that the vehicle seat can be made smaller in the left-right direction.

Further, since the contact member is fixed to the bracket while being in contact with the flat plate portion and the extension portion of the bracket, the rigidity of the portion of the second movable portion that contacts the lock member can be increased. The second movable part can be secured in the second position.

Further, by further providing a cover that covers the lock member at least from the left and right outer sides, it is possible to prevent dust from entering around the lock member, thereby improving the reliability of the operation of the vehicle seat.

Further, since both the abutting portion and the engaging portion of the lock member are positioned outside the upper rail in the left-right direction, it is possible to easily visually confirm the operation of the vehicle seat.

The contact width in the horizontal direction when the lock member is in the locked position and engages with the second movable portion is larger than the contact width in the horizontal direction when the lock member contacts the unlocking portion, The second movable part can be secured in the second position.

When the lock member is in the lock position, the abutting portion of the lock member that abuts the unlocking portion is located below the engaging portion that engages with the second movable portion, thereby complicating the mechanism. can be suppressed.

Since the position of the lock member in the vertical direction overlaps with the second movable portion, the vehicle seat can be made smaller in the vertical direction.

1 is a perspective view showing a vehicle seat according to an embodiment of the invention; FIG. It is a perspective view which shows an interlocking lever, a locking member, and a cover. FIG. 4 is an exploded perspective view showing an interlocking lever and a lock member; It is a figure which shows the positional relationship of a locking member, a reclining device, etc. FIG. It is a figure which shows an interlocking mechanism. 4A to 4D are diagrams (a) to (d) showing the state of each member when the vehicle seat is in the initial state; FIG. FIG. 10(a) to (d) show the state of each member when the seat back moves from the seating position to the intermediate position. 10A to 10D are diagrams (a) to (d) showing the state of each member when the seat body is slid forward and the lock member comes into contact with the unlock pin. 9A to 9D are diagrams (a) to (d) showing the state of each member when the lock member is rotated to the unlock position by sliding the seat body forward from the position shown in FIG. 8; 10A to 10D are diagrams (a) to (d) showing the state of each member when the interlocking lever is moved from the second position to the third position; FIG. Fig. 10(a) to (d) show the state of each member when the seat back is returned from the retracted position to the seated position. 8A to 8D are diagrams (a) to (d) showing the state of each member when the vehicle seat according to the modification is in the initial state. 10A to 10D are diagrams (a) to (d) showing the state of each member when the seat body is rotated from the sitting position to the first forward leaning position; FIG. 8A to 8D are diagrams (a) to (d) showing the states of each member when the seat body according to the modification is slid forward so that the lock member comes into contact with the unlock pin. 15A to 15D are diagrams (a) to (d) showing the state of each member when the lock member is rotated to the unlock position by sliding the seat body forward from the position shown in FIG. 14; 10A to 10D are diagrams (a) to (d) showing the state of each member when the interlocking lever is moved from the second position to the third position; FIG. 10A to 10D are diagrams (a) to (d) showing the state of each member when the seat body is returned from the second forward leaning position to the sitting position. It is a figure which shows a latch apparatus, and is the figure (a) which shows the state in which a latch is located in an engagement position, and the figure (b) which shows the state in which a latch is located in a disengagement position.

An embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the vehicle seat S is, for example, a seat in the second row of the 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 portion, and left and right lower rails S5 as an example of a base portion. In the present invention, front and rear, left and right, and up and down are based on the occupant sitting on the seat.

The seat body S0 includes 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 rotates between an upright sitting position (position shown in FIG. 6(a)) and a retracted position (position shown in FIG. 10(a)) in which it is folded so as to overlap the seat cushion S1. It is possible.

The reclining device R is a device that switches the seat back S2 between a rotatable state and a non-rotatable state with respect to the seat cushion S1. The reclining device R has a reclining spring R1 as a movable spring. The reclining spring R1 biases the seat back S2 from the seating position toward the retracted position.

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

The lower structures S4 are provided on the left and right sides of the lower surface of the seat cushion S1 so as to protrude from the lower surface of the seat cushion S1. The lower structure S4 includes 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 longitudinal direction with respect to the lower rail S5. The seat cushion S1 is attached to the upper rail S42 via the base frame S41.

The lower rail S5 supports the upper rail S42 so as to be movable in the longitudinal direction. The lower rail S5 is fixed to the vehicle floor F (see FIG. 6(a)).

A slide lock mechanism 10 and a simple lock mechanism 20 are provided in the lower structure S4. The slide lock mechanism 10 is a mechanism for prohibiting or permitting 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.

As shown in FIG. 6B, the slide lock mechanism 10 has a slide lock member 11 as a movable lock member. The slide lock member 11 is a member for locking or unlocking the slide movement of the seat body S0. The slide lock member 11 is rotatably supported by the lower structure S4, and a rotatable hook-shaped tip portion 11A can be engaged with a hole S51 formed in the lower rail S5. The slide lock member 11 has a movable lock position (position shown in FIG. 6(b)) for locking the sliding movement of the seat body S0 and a release position (position shown in FIG. 7(b)) for unlocking the seat body S0. It is possible to rotate between them. The slide lock member 11 is urged from the unlocked position toward the movable lock position by a spring (not shown).

Returning to FIG. 1, the simple lock mechanism 20 is a mechanism that restricts the movement of the seat back S2 from the intermediate position (position shown in FIG. 7A) between the seating position and the retracted position to the retracted position. is. The simple lock mechanism 20 is provided on the left lower structure S4.

As shown in FIGS. 6A and 6D, the simple lock mechanism 20 includes an interlocking lever 40 as an example of the second movable portion, and a lock member 50 for locking the movement of the interlocking lever 40. there is The interlocking lever 40 is a member that rotates in conjunction with tilting of the seatback S2, and is connected to the seatback S2 via a power transmission member (not shown) such as a link, gear, or belt.

The interlocking lever 40 is rotatably provided on the left and right outer side surfaces of the lower structural body S4, and is rotatable with respect to the lower structural body S4. The interlocking lever 40 has a first position P1, a second position P2 (see FIG. 7(d)) moved with respect to the first position P1, and a position opposite to the first position P1 with respect to the second position P2. It is rotatable to the third position P3 (see FIG. 10(d)).

Specifically, the interlocking lever 40 is positioned at the first position P1 when the seat back S2 is positioned at the seating position. The interlocking lever 40 is positioned at the second position P2 when the seat back S2 is positioned at the intermediate position. The interlocking lever 40 is positioned at the third position P3 when the seatback S2 is positioned at the retracted position. Therefore, the aforementioned reclining spring R1 urges the interlocking lever 40 through the seatback S2 so that the interlocking lever 40 moves from the first position P1 toward the third position P3.

The lock member 50 is rotatably provided on the left and right outer side surfaces of the lower structure S4. The lock member 50 is engaged with the interlocking lever 40 to lock the interlocking lever 40 from moving from the second position P2 to the third position P3. 10(d)) that allows the interlocking lever 40 to move from the second position P2 to the third position P3. there is The lock member 50 is urged from the unlock position toward the lock position by a spring (not shown).

The lower rail S5 is provided with an unlocking pin S52 as an example of an unlocking portion. The unlocking pin S52 protrudes from the left and right outer side surfaces of the lower rail S5 and can come into contact with the lock member 50 in the front-rear direction. The unlock pin S52 has a function of contacting the lock member 50 and rotating the lock member 50 from the lock position to the unlock position when the lower structure S4 moves to a predetermined position forward of the lower rail S5. .

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

As shown in FIG. 3 , the interlocking lever 40 has a lever body 41 , a bracket 42 and a contact member 43 . Each member (41 to 43) constituting the interlocking lever 40 is made of metal, for example.

The lever main body 41 is an elongated plate-like member. The lever main 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 attached to the lower structural body S4 about the rotation axis X1.

The bracket 42 is joined to the lever body 41 by welding or the like. Thereby, the bracket 42 is rotatably attached to the lower structural body S4 via the lever body 41, and is rotatable with respect to the lower structural body S4 about the rotation axis X1 extending in the left-right direction. It has become.

The bracket 42 has a flat plate portion 42A orthogonal to the rotation axis X1 and an extension portion 42B extending from the flat plate portion 42A in the direction in which the rotation axis X1 extends. The flat plate portion 42A has a hole 42C that is concentric with the hole 41A of the lever body 41. As shown in FIG.

The extending portion 42B is formed so as to be bent laterally outward from the flat plate portion 42A. The extending portion 42B is bent in an L shape along a corner forming part of the peripheral edge of the flat plate portion 42A. Specifically, the extending 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 .

The contact member 43 is a member having a rear end portion 43A that can come into contact with the lock member 50. As shown in FIG. The contact member 43 is fixed to the bracket 42 by welding or the like while being in contact with the flat plate portion 42A and the extension portion 42B. A concave portion 43B is formed in the front end portion of the contact member 43 to avoid interference with an R-shaped portion (not shown) formed by bending the extending portion 42B from the flat plate portion 42A. As a result, the contact member 43 can be reliably brought into contact with the flat plate portion 42A and the extension portion 42B.

The lock 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, and the first plate 52. and a connecting shaft 54 connecting the second plate 53 and an engaging portion 55 supported by the connecting shaft 54 . Each member (51 to 55) constituting the lock member 50 is made of metal, for example.

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

The first plate 52 is a substantially V-shaped flat plate orthogonal 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 portion of the main body portion 52A. The front end of the contact portion 52B can contact the lock release pin S52 described above.

The main body portion 52A has a trapezoidal shape in which the rear portion of the upper surface is a flat surface along the front-rear direction, and the front portion of the upper surface is an inclined surface that slopes obliquely forward and downward. The body portion 52A has a hole H1 through which the second shaft portion 51B passes and a hole H2 through which the connecting shaft 54 passes. The hole H1 is formed in the front corner of the upper portion of the body portion 52A. The hole H2 is formed in the front end portion of the body portion 52A. The first plate 52 is fixed to the rotating shaft 51 by welding or the like with the second shaft portion 51B in the hole H1 and in contact with the flange portion 51C.

The connecting shaft 54 has a shaft portion 54A and a flange portion 54B having a larger diameter than the shaft portion 54A. The shaft portion 54A protrudes laterally outward 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 inserted into the hole H2 of the first plate 52 and the flange portion 54B in contact with the first plate 52 .

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 .

The second plate 53 has a first portion 53A sandwiching the engaging portion 55 with the first plate 52 and a second portion 53B extending from the first portion 53A toward the first plate 52 . The first portion 53A has a hole H3 that engages with the boss provided at the tip of the second shaft portion 51B and a hole H4 that engages with the boss provided at the tip of the shaft portion 54A. The shafts 51B and 54A are joined by welding or the like while the bosses are engaged with the holes H3 and H4.

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

Further, the lock member 50 overlaps the reclining device R in the left-right direction. Both the contact portion 52B and the engaging portion 55 of the lock member 50 are positioned outside the upper rail S42 in the left-right direction.

Further, as shown in FIG. 6D, the locking member 50 overlaps the interlocking lever 40 in the vertical direction. The contact portion 52B is positioned below the engagement portion 55 when the lock member 50 is in the lock position.

As shown in FIG. 1, an interlocking mechanism 30 for interlocking the slide lock mechanism 10 with the movement of the seatback S2 is provided under the seat cushion S1. The interlocking mechanism 30 changes the slide lock mechanism 10 from the locked state to the unlocked state when the seat back S2 rotates from the seating position to the intermediate position, and opens the slide lock mechanism 10 when the seat back S2 rotates from the intermediate position to the retracted position. It is configured to change from the unlocked state to the locked state.

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 members in the interlocking mechanism 30 and the interlocking lever 40 of the simple lock mechanism 20 are connected by a first wire W1 and a third wire W3. As a result, the force generated by the rotation of the seat back S2 can be transmitted to the interlocking mechanism 30. As shown in FIG.

The left and right slide lock mechanisms 10 are connected to members in the interlocking mechanism 30 by second wires W2. As a result, the force transmitted from the seatback S2 to the interlocking mechanism 30 can be transmitted to the left and right slide lock mechanisms 10 .

A slide lock release lever L2 for releasing the lock by the slide lock mechanism 10 is provided at the front end of the seat cushion S1. The slide lock release lever L2 is connected to members within the interlocking mechanism 30 by a fourth wire W4. As a result, the force applied to the slide lock release lever L2 can be transmitted to the left and right slide lock mechanisms 10 .

As shown in FIG. 5, the interlocking mechanism 30 includes 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 restricting spring 39 are provided. Each member (31 to 39) constituting the interlocking mechanism 30 is made of metal, for example.

The attachment member 31 is a member attached to the lower structure S4. The mounting member 31 is formed in a box shape by bending the peripheral portion of a sheet metal.

The first rotating member 32 and the second rotating member 33 are rotatably provided on the mounting member 31 so as to rotate about a common rotation axis X2. 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 .

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 above-described interlocking lever 40 (see FIG. 6(d)). As a result, in conjunction with the rotation of the interlocking lever 40, the first rotating member 32 moves between the first rotating position (the position in FIG. 6C) corresponding to the first position P1 and the second position P2. It is rotatable to a corresponding second rotational position (position in FIG. 7(c)) and a third rotational position (position in FIG. 10(c)) corresponding to the third position P3. In the following description, the rotating direction of the first rotating member 32 that rotates while being pulled by the first wire W1, that is, the clockwise rotating direction is also referred to as the first rotating direction. The direction opposite to the movement direction is also referred to as the second rotation direction.

The first rotating member 32 further has an engaging edge portion 32B that engages with the swinging member 34 and a restricting edge portion 32C that restricts rotation of the holding member 35 . The engaging edge portion 32B and the restricting edge portion 32C are formed as part of the peripheral edge of the first rotating member 32 .

The engagement edge portion 32B is positioned upstream in the first rotation direction with respect to a later-described swing engagement portion 34A of the swing member 34 . The engaging edge portion 32B engages with the swing engaging portion 34A when the first rotating member 32 is positioned in the range from the first rotating position to the second rotating position, and the first rotating member 32 is disengaged from the rocking engaging portion 34A in the process of moving from the second rotating position to the third rotating position. As a result, the rocking member 34 engages with the engaging edge 32B of the first rotating member 32 when the interlocking lever 40 is positioned in the range from the first position P1 to the second position P2, and the interlocking lever 40 moves from the second position P2 to the third position P3.

32 C of control edge parts are formed in circular arc centering on the rotation axis line X2. The regulating edge portion 32C is in contact with a later-described pin 35A of the holding member 35 until the first rotating member 32 reaches the second rotating position from the first rotating position. reaches the second pivot position, it is configured to be disengaged from the pin 35A.

The first rotating member 32 is biased in the second rotating direction by a first spring 36 . That is, the first spring 36 urges the first rotating member 32 in a direction opposite to the direction in which the force is received from the first wire W1. The mounting member 31 has a restricting wall 31B that restricts the movement of the first rotating member 32 from the first rotating position in the second rotating direction.

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

The second rotating member 33 further has a regulating edge portion 33B that restricts the rotation of the holding member 35, and a contact edge portion 33C that can come into contact with the holding member 35 in the rotating direction of the second rotating member 33. ing. The restricting edge portion 33B and the contact edge portion 33C are formed as part of the peripheral edge of the second rotating member 33 .

The restricting edge portion 33B is formed in an arc shape centering on the rotation axis X2, and overlaps the restricting edge portion 32C of the first rotating member 32 when projected in the direction along the rotation axis X2. . The regulating edge portion 33B can come into contact with or separate from the pin 35A of the holding member 35 in the same manner as the regulating edge portion 32C of the first rotating member 32 .

The contact edge portion 33C extends from the downstream end of the regulation edge portion 33B in the second rotation direction toward the rotation axis X2. The contact edge portion 33C contacts the pin 35A when the holding member 35 is positioned at a regulating position (position shown in FIG. 7(c)), which will be described later.

The second rotating member 33 further has an arcuate hole 33D centered on the rotating axis X2. The mounting member 31 has a restricting projection 31C that fits into the hole 33D. The restriction projection 31C contacts the upstream end of the hole 33D in the first rotation direction when the second rotation member 33 is positioned at the position shown in FIG. 7 (the position corresponding to the second rotation position). This restricts the movement of the second rotating member 33 from the position shown in FIG. 7 in the first rotating direction. Further, the mounting member 31 has a restricting piece 31D that restricts the second rotating member 33 from moving in the second rotating direction from the position shown in FIG. 5 (the position corresponding to the first rotating position). there is

The second rotating member 33 is biased in the second rotating direction by a second spring 37 . That is, the second spring 37 biases the second rotating member 33 in the direction in which the first rotating member 32 rotates by the biasing force of the first spring 36 .

The swing member 34 is provided swingably on the second swing member 33 about the swing axis X3. The rocking member 34 has a rocking engaging portion 34A that engages with the engaging edge portion 32B of the first rotating member 32 . The rocking engagement portion 34A has a cylindrical surface that contacts the engagement edge portion 32B, and is positioned upstream in the first rotation direction with respect to the rocking axis X3. The rocking engagement portion 34A is movable in the radial direction of the boss 31A by rocking the rocking member 34. As shown in FIG. The swinging member 34 is biased by a swinging spring 38 in a direction in which the swinging engagement portion 34A faces the rotation axis X2.

By configuring the first rotating member 32, the second rotating member 33, and the swinging member 34 as described above, the first rotating member 32 and the second rotating member 33 move in the first rotating direction. After the state of rotating together and the state of rotating the first rotating member 32 and the second rotating member 33 separately are switched, and the slide lock member 11 moves from the movable lock position to the release position, It is possible to move to the movable lock position again.

Specifically, when the interlocking lever 40 moves from the first position P1 to the second position P2 as shown in FIGS. Both the member 32 and the second rotating member 33 rotate to move the slide lock member 11 from the movable lock position to the release position. As shown in FIGS. 9 and 10, when the interlocking lever 40 moves from the second position P2 to the third position P3, the swinging member 34 is disengaged from the first rotating member 32, and the first rotating member 32 and the second rotating member 32 are separated from each other. Since the rotating members 33 can rotate independently, the slide lock member 11 moves from the unlocked position to the movable lock position.

The torque applied to the first rotating member 32 by the reclining spring R<b>1 via the interlocking lever 40 and the like is greater than the torque applied to the first rotating member 32 by the first spring 36 and the second spring 37 . As a result, the unit composed of the first rotating member 32, the second rotating member 33, and the swinging member 34 is rotated by the first spring 36 and the second spring 37 by the first wire W1 pulled by the biasing force of the reclining spring R1. It is possible to rotate against the biasing force of.

The holding member 35 moves in the second turning direction of the second turning member 33 when the first turning member 32 is at the second turning position, that is, when the interlocking lever 40 is at the second position P2. is a member that restricts the rotation of the slide lock member 11 to hold the slide lock member 11 at the release position. The holding member 35 is rotatably provided on the mounting member 31 about the holding axis X4.

The holding member 35 has a pin 35A engageable with the restricting edges 32C, 33B and the contact edge 33C. The pin 35A is movable in the radial direction of the boss 31A as the holding member 35 rotates.

The holding member 35 has a permissible position (position shown in FIG. 5) at which the rotation of the second rotating member 33 in the second rotating direction is permitted, and a position at which the second rotating member 33 is rotated in the second rotating direction. is rotatable between a regulating position (position shown in FIG. 7(c)). The holding member 35 is urged from the allowable position toward the regulated position by a regulating spring 39 .

The holding member 35 is located at the allowable position when the first rotating member 32 is located at the first rotating position, that is, when the interlocking lever 40 is located at the first position P1. When the holding member 35 is positioned at the allowable position, the pin 35A is in contact with the regulating edges 32C and 33B. As a result, the holding member 35 can be restricted from moving from the allowable position to the restricted position by the biasing force of the restricting spring 39 by the restricting edges 32C and 33B.

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 holding member 35 moves the pin 35A to the regulating edge. By deviating from the portions 32C and 33B, it rotates from the allowable position to the restricted position. When the holding member 35 is positioned at the restricted position, the pin 35A is in contact with the contact edge 33C. As a result, the pin 35</b>A can restrict the movement of the second rotating member 33 in the second rotating direction by the biasing force of the second spring 37 .

The holding 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 above-described interlocking lever 40 (see FIG. 6(d)). As a result, the holding member 35 rotates against the biasing force of the restricting spring 39 in conjunction with the rotation of the interlocking lever 40 .

The third wire W3 is connected to the holding member 35 and the interlocking lever 40 with a larger play than the first wire W1 (see FIG. 6(d)). Accordingly, when the interlocking lever 40 starts to move from the first position P1 toward the third position P3, the first rotating member 32 connected to the interlocking lever 40 by the first wire W1 immediately rotates. However, the holding member 35 connected to the interlocking lever 40 by the third wire W3 does not rotate for a while, and rotates while the interlocking lever 40 moves from the second position P2 to the third position P3. It's getting started.

In other words, the first wire W1 is set to be The interlocking lever 40 is interlocked with the first rotating member 32 . On the other hand, when the interlocking lever 40 moves from the first position P1 to the second position P2, the third wire W3 does not interlock the holding member 35 with the interlocking lever 40, and the interlocking lever 40 moves from the second position P2 to the second position P2. The holding member 35 is interlocked with the interlocking lever 40 when moving to the third position P3.

Next, a method of operating the vehicle seat S in the case of widening the vehicle compartment space by moving the vehicle seat S forward in a folded state, and the method of operating the vehicle seat S in the case of returning the vehicle seat S moved forward to the initial state. The operation of each member will be described. In the initial state, the postures and positions of the vehicle seat S and each member are assumed to be the postures and positions shown in FIG. 6(a).

As shown in FIG. 1, when the occupant operates the reclining release lever L1 to unlock the reclining device R, the biasing force of the reclining spring R1 moves the seat back S2 to the seating position as shown in FIGS. , toward the intermediate position, and interlockingly with this, the interlocking lever 40 rotates from the first position P1 toward 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 together with the second rotating member 33 in the first rotating direction.

When the second rotating member 33 rotates in the first rotating 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 release position. When the interlocking lever 40 reaches the second position P2, the interlocking lever 40 is engaged with the locking member 50, and the rotation of the interlocking lever 40 is restricted. As a result, the interlocking lever 40 is held at the second position P2, the seat back S2 is held at the intermediate position, and the first rotating member 32 and the second rotating member 33 are moved to the position shown in FIG. 7(c). retained. Therefore, the slide lock member 11 pulled by the second wire W2 connected to the second rotating member 33 is held at the released position.

Further, when the interlocking lever 40 reaches the second position P2, the holding member 35 is disengaged from the regulating edges 32C and 33B shown in FIG. 5 and pivoted from the allowable position to the regulating position. As a result, the holding member 35 restricts the second rotating member 33 from rotating in the second rotating direction by receiving the force of the second spring 37 or the spring that biases the slide lock member 11 . .

Thereafter, as shown in FIG. 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 as shown in FIG. to rotate. Thereby, the lock of the interlocking lever 40 is released.

When the interlocking lever 40 is unlocked, the biasing force of the reclining spring R1 rotates the seatback S2 from the intermediate position to the retracted position as shown in FIG. 10, and the interlocking lever 40 moves from the second position P2. It rotates to the third position P3.

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. By pulling the first wire W1, the first rotating member 32 rotates in the first rotating direction and moves from the second rotating position to the third rotating position. As 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 rotatable in the second rotating direction.

In the process of rotating the first rotating member 32 from the second rotating position to the third rotating position, when the swinging member 34 is disengaged from the engaging edge 32B of the first rotating member 32, the second rotating member 32 is rotated. The member 33 is returned to its initial position by the biasing force of the second spring 37 (see FIG. 5). As a result, the second wire W2 is loosened, and the slide lock member 11 moves from the unlocked position to the locked position again. As described above, the vehicle seat S can be moved forward in a folded state to widen the vehicle compartment space.

When returning the vehicle seat S that has been moved forward to its initial state, the occupant raises the seat back S2 that has fallen forward and returns it to the sitting position, as shown in FIG. When the seatback S2 is moved to the seating position, the reclining lock member of the reclining device R locks the seatback S2 at the seating position.

Further, when the seatback S2 rotates from the storage position to the seating position, the interlocking lever 40 rotates from the third position P3 to the first position P1. As a result, the first wire W1 is loosened, and the first rotating member 32 rotates from the third rotating position to the first rotating position. When the first rotating member 32 returns to the first rotating position, the swinging member 34 swings toward the rotation axis X2 by the biasing force of the swinging spring 38, and the first rotating member 32 is engaged again. It engages with the mating edge 32B (see FIG. 5).

Further, when the third wire W3 is loosened by rotating the interlocking lever 40 from the third position P3 to the first position P1, the holding member 35 is moved to the first rotating member 32 by the biasing force of the restricting spring 39. and the regulating edges 32C and 33B of the second rotating member 33. As shown in FIG. As a result, the interlocking mechanism 30 returns to its initial state.

Thereafter, the occupant operates the slide lock release lever L2 shown in FIG. 1 to unlock the slide lock member 11, and slides the seat body S0 rearward, thereby returning the vehicle seat S to the initial state. can be returned. When the occupant operates the slide lock release lever L2, the second rotating member 33 is rotated in the first rotating direction by the fourth wire W4, and the second rotating member 33 pulls the second wire W2. , the slide lock member 11 is unlocked.

According to the above, the following effects can be obtained in this embodiment.
A new mechanism for interlocking the slide lock member 11 for locking the sliding movement of the seat cushion S1 (lower structure S4) and the seat back S2 (interlocking lever 40) that moves with respect to the seat cushion S1 is provided. can do.

By configuring the first rotating member 32 and the second rotating member 33 to rotate about the common rotation axis X2, for example, the rotation axis of the first rotating member and the second rotating member The interlocking mechanism 30 can be miniaturized, and thus the vehicle seat S can be miniaturized, as compared with a configuration in which the rotation axes are arranged at different positions.

By restricting the rotation of the second rotation member 33 by the holding member 35, the slide lock member 11 can be more reliably held at the release position.

When the interlocking lever 40 moves from the first position to the second position, it is held at the second position by the lock member 50, so that the seat back S2 can be held at the intermediate position. When the seat cushion S1 is moved to a predetermined position with respect to the lower rails S5 when the interlocking lever 40 is at the second position, the locking member 50 is moved to the unlocked position, and the interlocking lever 40 is moved from the second position to the third position. , the seat cushion S1 can be moved from the intermediate position to the retracted position.

By sliding the seat body S0 to a predetermined position, it is possible to expand the movable range of the interlocking lever 40 at the second position.

Since the position of the locking member 50 in the left-right direction overlaps with the reclining device R, the vehicle seat S can be downsized in the left-right direction.

Since the contact member 43 is fixed to the bracket 42 while being in contact with the flat plate portion 42A and the extension portion 42B, the rigidity of the portion of the interlocking lever 40 that contacts the lock member 50 can be increased. It is possible to give a sense of rigidity to the action of S.

Since the lock member 50 is covered with the cover C, it is possible to prevent dust from entering around the lock member 50, and the reliability of the operation of the vehicle seat S can be improved.

Since the abutting portion 52B and the engaging portion 55 of the lock member 50 are positioned laterally outside the upper rail S42, the operation of the lock member 50 can be easily confirmed visually.

Since the contact width WD1 when the lock member 50 is in the lock position and engages with the interlocking lever 40 is larger than the contact width WD2 when the lock member 50 contacts the lock release pin S52, the interlocking lever 40 It is possible to improve the sense of rigidity of the operation when the is moved from the first position to the second position.

When the lock member 50 is in the lock position, the contact portion 52B is positioned below the engagement portion 55, so that the mechanism can be prevented from becoming complicated.

Since the position of the locking member 50 in the vertical direction overlaps with the interlocking lever 40, the vehicle seat S can be downsized in the vertical direction.

The present invention is not limited to the above-described embodiments, and can be used in various forms as exemplified below.

In the above-described embodiment, one lock member 50 has the contact portion 52B and the engagement portion 55, but the present invention is not limited to this. A mechanism that interlocks with the second member having a portion by a link mechanism or the like may be used as the lock member.

The first movable portion is not limited to being slidable relative to the base portion, and may be rotated. For example, the seat body as the first movable portion may be configured to rotate around the vertical axis with respect to the lower rail as the base portion.

The second movable portion is not limited to rotating with respect to the first movable portion, and may slide.

The base portion is not limited to the lower rail, and may be another member 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 the seat cushion, the first movable portion may be the seat back, and the second movable portion may be a member that rotates with respect to the seat back, such as an armrest.

In the above embodiment, the reclining lock member was exemplified as the second lock member capable of locking the second movable portion in the first position, but the present invention is not limited to this, and the second movable portion can be locked in the first position. Any possible member may be used.

In the above embodiment, the holding member is provided to hold the second rotating member at the position corresponding to the second rotating position. If the engagement between the and the first rotating member is maintained, the holding member may be omitted.

The connecting member is not limited to a wire, and may be a rod or the like, for example.

In the above embodiment, the interlocking lever 40 is interlocked with the tilting of the seat back S2, but the present invention is not limited to this. For example, as shown in FIGS. Alternatively, the interlocking lever 40 may be interlocked with the tilting of the seat body S0.

Specifically, in the form shown in FIG. 12, the seat cushion S1 is rotatably supported by the lower structure S4 about a rotation axis X5 along the left-right direction. The seat body S0 is rotatable between a seating position shown in FIG. 12, a first forward tilting position shown in FIG. 13, and a second forward tilting position shown in FIG. At the seated position, the seat surface of the seat cushion S1 is substantially horizontal. The first forward tilting position is a position in which the seat cushion S1 is tilted forward from the seating position. The second forward leaning position is a position where the seat cushion S1 leans forward more than the first forward leaning position. The seat body S0 is urged by a spring (not shown) from the sitting position toward the second forward leaning position.

The seat cushion S1 has a latch device 60 for locking the seat body S0 in the seating position. The latch device 60 locks or unlocks the seat body S0 with respect to the lower structure S4 by engaging or disengaging with a striker 70 provided on the lower structure S4. The striker 70 can be, for example, a rod-shaped member that connects the left and right frames of the lower structural body S4.

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

Latch 62 engages striker 70 when latch 62 is in the engaged position. The latch 62 disengages from the striker 70 when the latch 62 is in the disengaged position. The latch 62 is urged from the disengaged position toward the engaged position by a spring (not shown).

Returning to FIG. 12, a latch release lever L11 for releasing the lock by the latch 62 is provided on the upper portion of the seatback S2. The latch release lever L11 and the latch 62 are connected by a wire W11.

The interlocking lever 40 according to this embodiment is configured to interlock with the rotation of the seat body S0. Specifically, the interlocking lever 40 is connected to the seat body S0 via a power transmission member (not shown) such as a link, gear, or belt.

The interlocking lever 40 is positioned at the first position P1 when the seat body S0 is positioned at the seating position. The interlocking lever 40 is positioned at the second position P2 when the seat body S0 is positioned at the first forward leaning position (see FIG. 13). The interlocking lever 40 is positioned at the third position P3 when the seat body S0 is positioned at the second forward leaning position (see FIG. 16).

Next, the vehicle seat S in the case of widening the passenger compartment space by moving forward the seat body S0 tilted forward to the second forward tilting position and in the case of returning the seat body S0 moved forward to the initial state. and the operation of each member will be described. In the initial state, the postures and positions of the seat body S0 and each member are as shown in FIG. 12(a).

As shown in FIGS. 12(a) and 13(a), when the occupant operates the latch release lever L11 to unlock the latch device 60, the urging force of the spring (not shown) moves the seat body S0 to the seating position. , toward the first forward leaning position, and interlocking with this, the interlocking lever 40 rotates from the first position P1 toward 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 together with the second rotating member 33 in the first rotating direction.

When the second rotating member 33 rotates in the first rotating 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 release position. When the interlocking lever 40 reaches the second position P2, the interlocking lever 40 is engaged with the locking member 50, and the rotation of the interlocking lever 40 is restricted. As a result, the interlocking lever 40 is held at the second position P2, and thus the seat body S0 is held at the first forward tilting position, and the first rotating member 32 and the second rotating member 33 are rotated as shown in FIG. 13(c). position. Therefore, the slide lock member 11 pulled by the second wire W2 connected to the second rotating member 33 is held at the release position.

Further, when the interlocking lever 40 reaches the second position P2, the holding member 35 rotates from the allowable position to the restricted position. Thereby, the holding member 35 restricts the rotation of the second rotating member 33 in the second rotating direction.

Thereafter, as shown in FIG. 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 as shown in FIG. to rotate. Thereby, the lock of the interlocking lever 40 is released.

When the interlocking lever 40 is unlocked, as shown in FIG. 16, the biasing force of the spring (not shown) causes the seat body S0 to rotate from the first forward tilting position to the second forward tilting position, and the interlocking lever 40 rotates from the second position P2 to the third position P3.

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. By pulling the first wire W1, the first rotating member 32 rotates in the first rotating direction and moves from the second rotating position to the third rotating position. As 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 rotatable in the second rotating direction.

In the process of rotating the first rotating member 32 from the second rotating position to the third rotating position, when the swinging member 34 is disengaged from the engaging edge 32B of the first rotating member 32, the second rotating member 32 is rotated. The member 33 is returned to its initial position by the biasing force of the second spring 37 (see FIG. 5). As a result, the second wire W2 is loosened, and the slide lock member 11 moves from the unlocked position to the locked position again. As described above, the seat body S0 tilted forward to the second forward tilted position can be moved forward to widen the vehicle interior space.

When returning the seat body S0 moved forward to the initial state, as shown in FIG. 17, the occupant rotates the seat body S0 in the second forward leaning position to return it to the sitting position. When the seat body S0 is moved to the seating position, the latch device 60 is engaged with the striker 70, thereby locking the seat body S0 at the seating position.

Further, when the seat body S0 rotates from the second forward leaning position to the sitting position, the interlocking lever 40 rotates from the third position P3 to the first position P1 in conjunction therewith. As a result, the first wire W1 is loosened, and the first rotating member 32 rotates from the third rotating position to the first rotating position. When the first rotating member 32 returns to the first rotating position, the swinging member 34 swings toward the rotation axis X2 by the biasing force of the swinging spring 38, and the first rotating member 32 is engaged again. It engages with the mating edge 32B (see FIG. 5).

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

Thereafter, the occupant operates the slide lock release lever L2 shown in FIG. 1 to unlock the slide lock member 11, and slides the seat body S0 rearward, thereby returning the vehicle seat S to the initial state. can be returned.

Each element described in the above embodiment and modifications may be implemented in any combination.

40 interlocking lever 50 lock member S vehicle seat S1 seat cushion S2 seat back S4 lower structure S5 lower rail S52 unlock pin

Claims (10)

A vehicle seat having a seat cushion and a seat back,
a base;
a first movable portion movable with respect to the base portion;
A second movable part movable with respect to the first movable part, the second movable part having a first position, a second position moved relative to the first position, and the first position relative to the second position. a second movable portion movable to a third position on the opposite side;
A lock member attached to the first movable part, the lock locking the movement of the second movable part from the second position to the third position by engaging the second movable part. a lock member movable between a position and an unlock position that allows the second movable portion to move from the second position to the third position by disengagement from the second movable portion; ,
A lock release portion provided on the base portion, which abuts on the lock member when the first movable portion moves to a predetermined position with respect to the base portion, and unlocks the lock member from the lock position. an unlocking unit for moving to the locked position;
A vehicle seat comprising: The base portion has a lower rail fixed to the floor of the vehicle,
2. The vehicle seat according to claim 1, wherein the first movable portion has an upper rail that is slidable with respect to the lower rail and to which the seat cushion is attached. The vehicle seat according to claim 2, wherein the lock member is rotatably supported with respect to the first movable portion. further comprising a reclining device that switches the seat back between a rotatable state and a non-rotatable state with respect to the seat cushion,
3. The vehicle seat according to claim 2, wherein the locking member overlaps the reclining device in a horizontal direction. The second movable part is
A bracket attached to the first movable part so as to be rotatable about a rotation axis, comprising a flat plate part orthogonal to the rotation axis and a direction in which the rotation axis extends from the flat plate part a bracket having an extension extending into the
3. The contact member according to claim 2, further comprising a contact member fixed to the bracket in contact with the flat plate portion and the extension portion, the contact member being capable of contacting the lock member. car seat. 3. The vehicle seat according to claim 2, further comprising a cover that covers the locking member at least from the left and right outer sides. A contact portion of the lock member that contacts the unlocking portion and an engaging portion that engages the second movable portion are both positioned outside the upper rail in the left-right direction. The vehicle seat according to claim 2. The contact width in the lateral direction when the lock member engages with the second movable portion when the lock member is in the lock position is larger than the contact width in the lateral direction when the lock member contacts the unlocking portion. 3. The vehicle seat according to claim 2, wherein . When the lock member is in the lock position, a contact portion of the lock member that contacts the lock release portion is positioned below an engagement portion that engages with the second movable portion. The vehicle seat according to claim 2. The vehicle seat according to any one of claims 2 to 9, wherein the lock member overlaps the second movable portion in the vertical direction.

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