JP2016222139A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat which allows a seat cushion to be held at an expansion position and a storage position by utilizing an engaging part and an engaged part, and in which an operational member for operating the engaging part is configured not to move by following the seat cushion.SOLUTION: In the vehicle seat, which has a seat back 3, a base bracket 7, and a seat cushion 4 rotatably mounted to the base bracket 7: an engaging part 71 to be used for holding the seat cushion 4 at a storage position and an expansion position is comprised in the base bracket 7; an engaged part 41 to be engaged with the engaging part 71 is comprised in the seat cushion 4; and an operational member 72 for operating the engaging part 71 is comprised in the base bracket 7.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle seat.

  2. Description of the Related Art Conventionally, there is known a vehicle seat that can be raised (stored position) by flipping up the front end portion of a seat cushion. Such a seat is called a chip-up seat, and allows the space in the vehicle to be used for various purposes. In the tip-up seat, when maintaining a state (deployment position) where the seat cushion is along the floor surface, a hook provided on the seat cushion is hooked on a U-shaped striker provided on the floor surface. (See Patent Document 1). In such an embodiment, another mechanism is required to restrict the movement of the seat cushion in the state where the front end of the seat cushion is flipped up. That is, a mechanism for restricting movement of the seat cushion at the retracted position and a mechanism for restricting movement of the seat cushion at the deployed position are separately required. On the other hand, the technique described in Patent Document 2 can restrict the movement of the seat cushion from the retracted position and the deployed position by selecting and fixing the relative positions of the members formed in a link shape. With such a structure, it is possible to hold the seat cushion in both the retracted position and the deployed position with a single mechanism although it is complicated.

JP 2014-004898 A Japanese Patent Laid-Open No. 2003-040009

  By the way, the tip-up seat described in Patent Document 2 has an operation member (operation lever) operated by a user on the seat cushion side in order to raise the seat. With such a configuration, when the operation member moves from the deployed position to the retracted position, the operation member also follows the seat cushion, so that the operation member may become an obstacle at the retracted position.

  The present invention has been devised in view of the above points, and the problem to be solved by the present invention is to solve the problem of the seat cushion in the deployed position and the retracted position using the engaging portion and the engaged portion. With respect to a vehicle seat that can be held, an operation member capable of operating an engagement portion is configured to prevent movement following a seat cushion.

  In order to solve the above problems, the present means takes the following means. First, a first means is a vehicle seat having a seat back, a base bracket, and a seat cushion rotatably attached to the base bracket, and holds the seat cushion in a retracted position and a deployed position. The base bracket is provided with an engaging portion that is used to perform the engagement, the engaged portion that engages with the engaging portion is provided in the seat cushion, and an operation member that operates the engaging portion is the base bracket. Is a vehicle seat.

  According to the first means, since the engaging portion and the engaged portion are used to hold the seat cushion at the retracted position and the deployed position, it may be possible to suppress the number of parts. Further, since the operation member is provided on the base bracket, it is possible to prevent the operation member from moving following the seat cushion.

  A second means is a vehicle seat according to the first means, wherein the engaging portion includes a single convex portion, and the engaged portion includes a first concave portion and a second concave portion. The convex portion is a vehicle seat that engages with the first concave portion when the seat cushion is held in the retracted position and engages with the second concave portion when the seat cushion is held in the deployed position.

  According to this second means, it may be possible for the convex portion to move smoothly with respect to the concave portion. Therefore, a situation in which the engaging portion and the engaged portion are not engaged can be suppressed.

  The third means relates to the first or second means, wherein the operating member includes a flexible member straddling the inside and outside of the shield, and operates the flexible member from the outside of the shield to The engagement state between the engagement portion and the engaged portion can be released by moving a portion located inside the engagement portion.

  According to the third means, the engaging portion can be moved by operating a flexible member located outside the shield among the operation members. The flexible member located outside the shield is easily deformed according to the surrounding environment. Therefore, it may be possible to suppress the possibility that the operation member becomes an obstacle in both the deployed position and the retracted position.

  The present invention relates to a vehicle seat that enables the seat cushion to be held at the deployed position and the retracted position by using the engaging portion and the engaged portion, and the operation member capable of operating the engaging portion is the seat cushion. It may be possible to follow and not move.

1 is a perspective view of a vehicle seat in Embodiment 1. FIG. 1 is a perspective view showing the inside of a vehicle seat in Example 1. FIG. 1 is an exploded perspective view of a vehicle seat in Embodiment 1. FIG. It is a side view which shows the positional relationship of the engaging part and engaged part in a retracted position. It is a side view which shows the positional relationship of the engaging part in a deployment position, and a to-be-engaged part. It is a disassembled perspective view around an engaging part and an engaged part. 6 is a perspective view showing the inside of a vehicle seat in Embodiment 2. FIG. 10 is a perspective view around an operation member in Embodiment 2. FIG. It is a perspective view around an engaging part and an engaged part in Example 2.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings as appropriate. In the present specification, directions such as the front-rear direction, the up-down direction, and the left-right direction are defined such that X shown in FIG. For example, normally, when the occupant is seated, entering the field of view is the front, and the occipital side not entering the field of view is the rear.

  The vehicle seat 1 in the present embodiment is applied to a vehicle. The vehicle seat 1 mainly faces the occupant's back, the seat cushion 4 that mainly faces the occupant's thigh, and mainly the occupant's head. The headrest 2 which becomes. The seat cushion 4 of the present embodiment can move relative to the seat back 3. More specifically, the seat cushion 4 is configured to be movable between the retracted position and the deployed position. Note that the vehicle in the present embodiment is a vehicle in which the seats are arranged in two rows in the front-rear direction. Further, the vehicle seat 1 of the present embodiment is applied to a rear seat which is a seat located on the rear side of two rows.

  The vehicle seat 1 in this embodiment includes a base bracket 7 that is fixed to the vehicle, as shown in FIG. As shown in FIG. 3, the seat back 3 is attached to the base bracket 7 in a state in which the seat back 3 cannot be tilted using an attachment part 57 or the like, and the seat cushion 4 is rotatably attached. The vehicle seat 1 of the present embodiment can be moved to a storage position where the seat cushion 4 is in an upright state by rotating the seat cushion 4 (see FIG. 4). Moreover, it can be moved to the deployment position where the user can sit on the seat cushion 4 (see FIG. 5). Further, the seat cushion 4 is configured to be able to be held in the retracted position or the deployed position. The seat back 3 is provided with a support spring 31 so that a seat pad (not shown) can be supported (see FIG. 3).

  In order to hold the seat cushion 4 in the retracted position or the deployed position, the engaging portion 71 provided on the base bracket 7 side and the engaged portion 41 provided on the seat cushion 4 side can be engaged. More specifically, in order to hold the seat cushion 4 at a predetermined position, the seat cushion 4 is configured to be engageable in a state where relative movement between the engaging portion 71 and the engaged portion 41 is suppressed (see FIGS. 3 to 5). .

  An engagement portion 71 is attached to the base bracket 7 so as to be relatively movable. The engaging portion 71 is configured to be displaced by operating the operation member 72. By operating this operation member 72, it is possible to select a state where the engaging portion 71 and the engaged portion 41 cannot move relative to each other and a state where the engaging portion 71 can move relatively.

  The engaged portion 41 that can engage with the engaging portion 71 is provided on the seat cushion 4 side. The engaged portion 41 is not allowed to move relative to the cushion frame 42. When the engaging portion 71 and the engaged portion 41 are engaged at a predetermined location, the engagement portion 71 and the cushion frame 42 are relatively moved. It becomes possible to make it the state which suppressed movement. A cushion unit 49 in which a seat pad (not shown) is covered with a skin can be placed on the cushion frame 42.

  Since the cushion frame 42 is rotatably attached to the base bracket 7, the engaged portion 41 can also rotate with respect to the base bracket 7. The engaged portion 41 is provided with two recesses used for determining the relative position with the engaging portion 71. One is a first recess 411 that can be engaged with the engaging portion 71 when the seat cushion 4 is held in the retracted position, and the other is the engaging portion 71 when the seat cushion 4 is held in the deployed position. The second recess 412 is engageable. In addition, the 1st recessed part 411 and the 2nd recessed part 412 are formed so that it may dent toward the mutually opposite direction.

  The engaging portion 71 is provided with one convex portion 712. By fitting the convex portion 712 into either the first concave portion 411 or the second concave portion 412, the relative movement between the engaging portion 71 and the engaged portion 41 is suppressed. As a result, the relative movement between the cushion frame 42 and the base bracket 7 is also suppressed, and the seat cushion 4 can be held at a predetermined position.

  In order to make it possible to select one of the first concave portion 411 and the second concave portion 412 so that one convex portion 712 is fitted and fitted, the convex portion is formed so that the engaging portion 71 has a hook shape. A portion 712 is formed. More specifically, the convex portion 712 is formed so as to protrude in a direction intersecting the longitudinal direction of the engagement main body 711 with respect to the tapered engagement main body 711.

  The aspect in which the convex part 712 provided in the engaging part 71 is engaged with the first concave part 411 and the aspect in which the convex part 712 is engaged with the second concave part 412 are not the same. When the convex portion 712 is engaged with the first concave portion 411, the engaged portion 41 is moved by hooking the engaging portion 71 on the engaged portion 41 as shown by a solid line in FIG. Suppressed. In this case, the engaging portion 71 covers the side surface between the first concave portion 411 and the second concave portion 412. On the other hand, when the convex portion 712 engages with the second concave portion 412, the engaged portion 41 moves by pressing the convex portion 712 against the second concave portion 412 as shown in FIG. That is restrained. Note that an arcuate curved surface is provided between the first recess 411 and the second recess 412, and the engagement portion 71 is moved as shown by a two-dot chain line in FIG. When the convex part 712 moves between the concave part 411 and the second concave part 412, it can slide.

  Next, each component will be described in more detail. The base bracket 7 is fixed to the floor F of the vehicle. The base bracket 7 includes a cylindrical rod 67, and includes leg portions 68 that support the rod 67. The vehicle seat 1 of this embodiment is immovable forward and backward, and the leg portion 68 is fixed so as not to move relative to the floor surface F. For this reason, the rod 67 provided in the base bracket 7 also cannot move relative to the floor surface F.

  The base bracket 7 includes a hinge portion 74 that is supported by the rod 67. The hinge part 74 is a part to which the cushion frame 42 is pivotably connected. Each of the hinge parts 74 located on the left and right sides of the cushion frame 42 is connected to the cushion frame 42. The hinge portion 74 of the present embodiment is configured by a plate extending upward from the periphery of the rod 67. The hinge portion 74 includes a pivot shaft portion 75 that can slide with the cushion frame 42. The cushion frame 42 is configured so that the rotation shaft portion 75 can be a rotation center. When the cushion frame 42 is rotated about the rotation shaft portion 75, the storage position that is positioned in a state in which the seat cushion 4 is flipped up from the deployed position where the cushion frame 42 is normally positioned when seated. It is possible to switch to. Conversely, the cushion frame 42 can be switched from the retracted position to the deployed position. In this embodiment, two cushion frames 42 are attached to one base bracket 7 so as to be juxtaposed in the left-right direction.

  In the present embodiment, an arm plate 422 that is a part of the cushion frame 42 is attached to the hinge portion 74 so as to be rotatable. The arm plate 422 is a portion connected to the rear portion of the cushion frame main body 421 on which the cushion unit 49 can be placed, and is connected to the left and right sides of the cushion frame main body 421, respectively. The cushion frame main body 421 has an outer edge formed by a frame portion 423 that is substantially rectangular in a plan view at the unfolded position, and includes a support plate 424 that spans the frame portion 423. A cushion unit 49 is placed on the frame portion 423 and the support plate 424. A part of the arm plate 422 is connected to the cushion frame main body 421 using a male screw 58 and a female screw 59.

  A support leg 425 that can contact the floor surface F is connected to the cushion frame main body 421. The support leg 425 is a part capable of supporting the load applied to the cushion frame main body 421 from below when the seat cushion 4 is in the deployed position. In this embodiment, the support leg 425 is connected to the front portion of the cushion frame main body 421. The support leg 425 is formed in a substantially U shape, and is connected to the cushion frame main body 421 so as to be tiltable. Therefore, when the seat cushion 4 is in the retracted position, it is possible to secure a space by moving the support leg 425 along the cushion frame main body 421.

  The cushion frame 42 of the present embodiment is rotatable about the rotation shaft portion 75, but is configured to be urged toward the storage position. Therefore, as shown in FIG. 6, in this embodiment, a spring member 51 is attached. The spring member 51 is a spiral spring wound in a spiral shape, and one end of the rose spring is fixed to the rotating shaft portion 75. Further, the other end of the rose spring is connected to a locking pin 426 provided in a convex shape on the cushion frame 42. Since the rotation shaft portion 75 and the hinge portion 74 are fixed so as not to move relative to each other, the rose spring is elastically deformed while the cushion frame 42 is pushed and displaced from the retracted position to the deployed position. When the force that presses the cushion frame 42 is released, it is possible to return to the retracted position using the elastic force of the rose spring.

  In order to suppress the movement of the cushion frame 42 at the unfolded position, the engaging portion 71 provided on the base bracket 7 side is configured to be engageable with the engaged portion 41 provided on the cushion frame 42 side. More specifically, the engaging portion 71 attached to the hinge portion 74 so as to be relatively movable is configured to be engageable with the engaged portion 41 provided in the cushion frame 42. The engaging portion 71 is configured so that the user can move it by operating the operation member 72. The operation member 72 includes a cloth-like band formed using a metal operation base 721 having a substantially triangular shape in a side view and a flexible member 722 connected to the distal end side of the operation base 721. Yes. By pulling the band, the operation base 721 can be moved, and thereby the engaging portion 71 can be moved.

  The operation base 721 and the engagement portion 71 are connected by a connection pin 53 having a substantially cylindrical shape. The connection pin 53 is attached in a state of being inserted into a through hole 54 that is a through hole formed in the hinge portion 74. The operation base portion 721 and the engaging portion 71 are disposed on both outer sides of the hinge portion 74, respectively. The connection pin 53 is slidable in the through hole 54 having a circular shape when viewed from the side. When the operation base 721 is rotated around the axis of the connection pin 53, the engagement portion 71 is configured to be rotated accordingly. Yes.

  Since the operation base 721 in the present embodiment is located inside the resin shield 63 that covers a part of the hinge portion 74, the operation base 721 has a structure in which the user cannot make direct contact. The band connected to the operation base 721 inside the shield 63 is arranged so that the end thereof is located outside the shield 63 through the groove 65 provided in the shield 63 (see FIG. 1). If the end of the band located outside the shield 63 is pulled, the operation base 721 located inside the shield 63 can be moved, and the restriction on the movement of the engaged portion 41 is released. When the force applied to the band is released, the operation base 721 tries to return to the original position by the action of the torsion spring located between the operation base 721 and the hinge portion 74.

  In order to move the operation base 721 moved from the predetermined location toward the predetermined location, the urging force is applied to the engaging portion 71 as shown by the white arrow in FIG. In order to enable such a configuration, the spring member 55 is disposed between the hinge portion 74 and the operation base portion 721 in the present embodiment. The spring member 55 of the present embodiment uses a helically wound torsion spring, and fixes one end side to the hinge portion 74 and the other end side to the operation base portion 721. The central axis of the torsion spring is arranged so as to substantially coincide with the axis of the connection pin 53, and is configured to generate an elastic force by moving the operation base 721 from a predetermined location.

  An engaged portion 41 that can engage with the engaging portion 71 is formed in the cushion frame 42. In the present embodiment, the engaged portion 41 is formed so that it can be integrated with the arm plate 422 of the cushion frame 42. In this embodiment, the engaged portion 41 is formed on the engaged plate 61 having a concave shape on the side surface. The engaged plate 61 is fixed to the arm plate 422 by welding, and the engaged plate 61 and the arm plate 422 are connected in a state in which relative movement is impossible. A washer 69 is disposed between the engaged plate 61 and the hinge portion 74.

  Since the engaged portion 41 cannot move relative to the arm plate 422, the engaged portion 41 also moves when the arm plate 422 moves, and the arm plate 422 moves when the movement of the engaged portion 41 is suppressed. Is also suppressed. The arm plate 422 is configured to be rotatable about the rotation shaft portion 75, but the engaged portion 41 abuts the engaging portion 71 in a predetermined state, and the movement of the engaged portion 41 is suppressed. As a result, the movement of the arm plate 422 is also suppressed.

  The engaged portion 41 includes a first recess 411 used when the seat cushion 4 is held in the retracted position and a second recess 412 used when the seat cushion 4 is held in the deployed position. I have. The rotation shaft portion 75 connected to the engaged portion 41 is disposed closer to the cushion frame main body 421 than the connection pin 53 connected to the engaging portion 71.

  The engaging portion 71 includes a convex portion 712 that can selectively engage both the first concave portion 411 and the second concave portion 412. The convex portion 712 engages with the first concave portion 411 when the seat cushion 4 is held in the retracted position, and engages with the second concave portion 412 when the seat cushion 4 is held in the deployed position. The convex portion 712 is engaged with the first concave portion 411 and the second concave portion 412 above the rotating shaft portion 75 when engaged.

  The protruding portion 712 of the present embodiment is formed with one raised portion, the first recessed portion 411 that engages with the protruding portion 712 is formed as one recess, and the second recessed portion 412 is also one. It is formed as a dent. Therefore, the convex part 712 and the first concave part 411 are not engaged by engaging a plurality of concaves and convexes. Similarly, the convex portion 712 and the second concave portion 412 are not engaged by engaging a plurality of concaves and convexes.

  When the seat cushion 4 is held at the retracted position, the convex portion 712 and the first concave portion 411 are in the state shown in FIG. In this state, since the engaging portion 71 is caught by the engaged portion 41, the engaged portion 41 is suppressed from rotating toward the front side. Therefore, the movement of the cushion frame 42 and the movement of the seat cushion 4 are suppressed. For this reason, the seat cushion 4 is held in the retracted position.

  When the operation base 721 is moved from the state where the convex portion 712 and the first concave portion 411 are engaged, the engagement between the convex portion 712 and the first concave portion 411 is performed as shown by a two-dot chain line in FIG. Is released. In this state, the seat cushion 4 can move toward the deployed position. When the seat cushion 4 is moved toward the deployed position while pushing the front end of the seat cushion 4, the convex portion 712 can be engaged with the second concave portion 412 as shown in FIG. 5. In this state, the engaging portion 71 is fitted into the engaged portion 41, and the engaged portion 41 is prevented from rotating toward the rear side. Therefore, the movement of the cushion frame 42 and the movement of the seat cushion 4 are suppressed. For this reason, it is possible to hold the seat cushion 4 in the deployed position.

  When it is desired to release the seat cushion 4 from being held at the deployed position, the operation base 721 may be moved to release the state where the convex portion 712 is engaged with the second concave portion 412. At this time, the seat cushion 4 is naturally moved to the storage position because an urging force is applied to the seat cushion 4 to move to the storage position side. Further, since the urging force is also applied to the operation base 721 moved from a predetermined position, when the seat cushion 4 returns to the storage position, the first concave portion 411 and the convex portion 712 are automatically engaged, and the seat It is suppressed that the cushion 4 moves to the deployment position side.

  In the vehicle seat 1 according to the present embodiment, the engaging portion 71 and the engaged portion 41 suppress movement in one direction, but do not suppress movement in the opposite direction. That is, in the case where the state at the storage position is maintained, the pivoting to move from the storage position to the deployment position is suppressed, but the pivoting in the opposite direction is not suppressed. Similarly, when the state at the deployed position is maintained, the pivoting to move from the deployed position to the storage position is suppressed, but the pivoting in the opposite direction is not suppressed.

  The rotation from the retracted position to the counter-deployed position is suppressed by the seat cushion 4 coming into contact with the seat back 3. The rotation from the unfolded position to the non-retracted position side is suppressed by the elastic force of the rose spring, and is limited by the support legs 425 provided on the cushion frame 42 coming into contact with the floor surface F.

  The vehicle seat 1 of this embodiment includes a base bracket 7, a seat cushion 4 that is rotatably attached to the base bracket 7, and a seat back 3. In particular, the base bracket 7 is provided with an engaging portion 71 used to hold the seat cushion 4 in the retracted position and the deployed position, and an engaged portion 41 that engages with the engaging portion 71 is provided on the seat cushion 4. An operation member 72 for operating the engaging portion 71 is the vehicle seat 1 provided in the base bracket 7.

  In the present embodiment, since the engaging portion 71 and the engaged portion 41 are used to hold the seat cushion 4 in the retracted position and the deployed position, it may be possible to suppress the number of parts. Further, since the operation member 72 is provided in the base bracket 7, it is possible to prevent the operation member 72 from moving following the seat cushion 4.

  The engaging portion 71 of this embodiment includes a single convex portion 712, and the engaged portion 41 includes a first concave portion 411 and a second concave portion 412. The convex portion 712 engages with the first concave portion 411 when the seat cushion 4 is held in the retracted position, and engages with the second concave portion 412 when the seat cushion 4 is held in the deployed position. It is. For this reason, it may be possible for the convex portion 712 to move smoothly with respect to the concave portion. Therefore, the situation where the engaging part 71 and the engaged part 41 do not mesh can be suppressed.

  The operation member 72 of the vehicle seat 1 of the present embodiment includes a flexible member 722 straddling the inside and the outside of the shield 63. By operating this flexible member 722 from the outside of the shield 63 and moving a portion located inside the shield 63, the engaged state between the engaging portion 71 and the engaged portion 41 can be released. Therefore, by operating the flexible member 722 located outside the shield 63 among the operation members 72, the engaging portion 71 can be moved. The flexible member 722 located outside the shield 63 is easily deformed according to the surrounding environment. Accordingly, it may be possible to suppress the possibility that the operation member 72 may become an obstacle in both the deployed position and the retracted position.

  With the vehicle seat 1 of this embodiment, there is no need to form the seat cushion 4 and the base bracket 7 in a link shape, and it may be possible to suppress an increase in weight. Further, since there is no need to arrange a link-like member or the like below the seat cushion 4, it is possible to effectively use the area around the floor surface F when the seat cushion 4 is stored in the storage position. In particular, since the vehicle seat 1 is not configured to move back and forth, the floor surface F is not covered with a slide rail or the like, and the area around the floor surface F can be effectively used.

  In the vehicle seat 1 of the present embodiment, the engaged portion 41 and the engaging portion 71 suppress the movement in one direction, but do not suppress the movement in the opposite direction. That is, in the case where the state at the storage position is maintained, the pivoting to move from the storage position to the deployment position is suppressed, but the pivoting in the opposite direction is not suppressed. Similarly, when the state at the deployed position is maintained, the pivoting to move from the deployed position to the storage position is suppressed, but the pivoting in the opposite direction is not suppressed. Therefore, it may be possible to move the front end of the seat cushion 4 to reduce the resistance generated between the engaging portion 71 and the engaged portion 41 and to move the engaging portion 71 thereafter.

  In the present embodiment, the movement of the seat cushion 4 from the deployed position to the non-retracted position side is suppressed by the elastic force of the rose springs and the support legs 425 coming into contact with the floor surface F. Further, the movement from the retracted position to the counter-deployed position is suppressed by the seat cushion 4 coming into contact with the seat back 3. Therefore, the engaging part 71 and the engaged part 41 need only be able to suppress the movement of the seat cushion 4 between the deployed position and the retracted position. Therefore, it can be possible to simplify the structure of the engaging portion 71 and the engaged portion 41. Moreover, since the precision of the shape of the engaging part 71 and the to-be-engaged part 41 is not calculated | required excessively, it can also become possible to suppress the burden of manufacture.

  Next, Example 2 will be described with reference to FIGS. FIG. 7 is a perspective view showing the inside of the vehicle seat 1 in the second embodiment. FIG. 8 is a perspective view around the operation member 72. FIG. 9 is a diagram showing a part of the component of FIG. 8 by broken lines. The second embodiment is mainly different from the first embodiment in the positional relationship between the operation member 72 and the engaging portion 71. Therefore, the following description will mainly focus on the differences.

  Also in this embodiment, the engaged portion 41 has a first recess 411 used when the seat cushion 4 is held in the retracted position and a first recess 411 used when the seat cushion 4 is held in the deployed position. A second recess 412. However, as shown in FIG. 9, in the engaged portion 41 in this embodiment, the first concave portion 411 and the second concave portion 412 are formed on the cushion frame main body 421 side with respect to the rotating shaft portion 75. . Further, the connection pin 53 slidably connected to the engaging portion 71 is formed on the cushion frame main body 421 side with respect to the rotating shaft portion 75. A spring member 55 is disposed between the engaging portion 71 and the hinge portion 74 in the present embodiment. The spring member 55 of the present embodiment uses a helically wound torsion spring, and one end side thereof is fixed to the hinge portion 74 and the other end side is fixed to the engaging portion 71. The central axis of the torsion spring is disposed so as to substantially coincide with the axis of the connection pin 53, and is configured to generate an elastic force by moving the engaging portion 71 from a predetermined position.

  The engaging portion 71 is provided with a bolt-shaped attachment portion 713 used for attaching the operation member 72. The attachment portion 713 of the present embodiment is formed with a columnar portion 714 that protrudes in a cylindrical shape toward the side surface, and a stopper portion 715 that is formed larger than the main portion of the columnar portion 714 in the radial direction of the columnar portion 714. ing. The stopper portion 715 prevents the operation member 72 hooked on the columnar portion 714 from falling off the columnar portion 714. The operation member 72 in this embodiment is formed of a cloth body that is a flexible member 722.

  Also in the present embodiment, the manner in which the convex portion 712 provided in the engaging portion 71 engages with the first concave portion 411 and the manner in which the convex portion 712 engages with the second concave portion 412 are not the same. However, unlike the first embodiment, when the convex portion 712 is engaged with the second concave portion 412, the engagement portion 71 is hooked on the engaged portion 41 as shown by the solid line in FIG. The movement of the engaging portion 41 is suppressed. In this case, the engaging portion 71 covers the side surface between the first concave portion 411 and the second concave portion 412. On the other hand, when the convex part 712 engages with the first concave part 411, the convex part 712 is pressed against the first concave part 411, thereby suppressing the engaged part 41 from moving. Note that an arcuate curved surface is provided between the first recess 411 and the second recess 412, and the convex portion 712 moves between the first recess 411 and the second recess 412. Is slidable.

  In the case of the present embodiment, since the flexible member 722 is directly attached to the engaging portion 71 without passing through the operation base portion 721, the structure can be simplified. In addition, the engaging portion 71 can be disposed closer to the cushion frame main body 421 than the engaged portion 41, and the hinge portion 74 can be prevented from increasing in size. In addition, since the operation member 72 can be disposed between the cushion frame 42 and the hinge portion 74, it can be possible to make the structure compact in the left-right direction.

  As mentioned above, although embodiment was described using two examples, this invention can be implemented with other various forms besides the said embodiment. For example, only one cushion frame can be attached to one base bracket.

  Of the plurality of cushion frames attached to one base bracket, only one cushion frame may be rotatably attached to the base bracket.

  The seat back need not be tiltable and can be tilted.

  There is no need for the engaged portion to be provided in the seat cushion by connecting and fixing the component having the first recess and the second recess to other components such as an arm plate. For example, the arm plate itself may have a shape including a first recess and a second recess.

  The cushion frame does not need to be configured to have a cushion unit attached thereto. For example, the cushion pad can be pressed against the cushion frame by placing the cushion pad on the cushion frame and winding the epidermis around the cushion frame.

  The vehicle is not limited to a vehicle, and may be a vehicle that flies in the air such as an airplane or a helicopter, or a vehicle that moves on the sea surface or in the sea such as a ship or a submersible.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Headrest 3 Seat back 4 Seat cushion 7 Base bracket 41 Engagement part 42 Cushion frame 49 Cushion unit 51 Spring member 53 Connection pin 55 Spring member 63 Shield 65 Groove 67 Rod 68 Leg part 71 Engagement part 72 Operation Member 74 Hinge part 75 Rotating shaft part 411 1st recessed part 412 2nd recessed part 421 Cushion frame main body 422 Arm plate 425 Support leg 712 Convex part 721 Operation base part 722 Flexible member

Claims (3)

Seat back,
A base bracket,
A vehicle seat having a seat cushion rotatably attached to the base bracket,
The base bracket is provided with an engaging portion used to hold the seat cushion in a retracted position and a deployed position,
The seat cushion includes an engaged portion that engages with the engaging portion,
A vehicle seat in which an operating member for operating the engaging portion is provided in the base bracket. The vehicle seat according to claim 1,
The engaging portion includes one convex portion,
The engaged portion includes a first recess and a second recess,
The convex portion engages with the first concave portion when the seat cushion is held in the retracted position, and engages with the second concave portion when the seat cushion is held in the deployed position. The vehicle seat according to claim 1 or 2,
The operation member includes a flexible member straddling the inside and outside of the shield,
A vehicle seat capable of releasing the engaged state between the engaging portion and the engaged portion by operating the flexible member from the outside of the shield and moving a portion located inside the shield.

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