JP2019064507A - Vehicular seat - Google Patents

Abstract

To provide a vehicular seat configured so that a sitting position can be adjusted by being slid as well as a seat cushion can be arranged at a specific position, which can improve operability and suppress generation of abnormal noise during the sliding.SOLUTION: The vehicular seat comprises a lock mechanism for locking a movable rail to a fixed rail, an operation mechanism and a link mechanism. The lock mechanism has main and sub lock parts 230A and 230B, and the link mechanism has main and sub links 520 and 540 arranged coaxially which can be individually rotated. The main and sub links are rotated in forward/backward directions so as to perform locking motion and locking-releasing motion for the main and sub lock parts respectively. First and second operation parts of the operation mechanism are connected to the main and sub links respectively. The link mechanism has an interlock-action part 545 that allows the main link to follow the sub link and rotate in a forward direction, when the sub link is rotated in the forward direction by operating the second operation part.SELECTED DRAWING: Figure 19

Description

  The present disclosure relates to a vehicle seat, and more particularly to a vehicle seat installed in a vehicle such as a car.

  Conventionally, as a vehicle seat installed in vehicles, such as a car, what equipped the slide function which can slide a seat cushion along with the direction of vehicles order (i.e. slide movement) is known. This slide function can be realized by providing the vehicle seat with a slide rail. By providing this sliding function on the vehicle seat, it is possible to adjust the seating position of the occupant in the longitudinal direction of the vehicle to any position.

  Usually, in a vehicle seat equipped with a slide function, the upper rail of the slide rail is assembled to the cushion frame so as to support the cushion frame forming the framework of the seat cushion, and the upper rail is mounted on the lower rail of the slide rail. In general, a lock mechanism is provided which locks against slide movement.

  In addition to the slide function mentioned above, a vehicle seat equipped with a function called a so-called walk-in function is known. The walk-in function temporarily shifts the seat cushion and the seat back from the original seating position by sliding the seat cushion toward the front of the vehicle while sliding the seat back forward to an extent that the seat back can not be backed up. It is a function which makes it evacuate and arrange at a specific position. In a vehicle provided with a vehicle seat equipped with the walk-in function, the space on the rear side of the seat cushion and seat back of the vehicle seat can be enlarged as necessary.

  A vehicle seat equipped with such a walk-in function includes, as the above-mentioned lock mechanism, a main lock portion provided for the slide function and a sub lock portion provided for the walk-in function. Many things are used.

  Here, although slightly different from the walk-in function, Japanese Patent Laid-Open No. 2014-94672 (patent document) is provided with a function to temporarily retract the seat cushion and seat back of the vehicle seat from the original seating position. There is a vehicle seat disclosed in 1). In the vehicle seat disclosed in Patent Document 1, a lock mechanism having a configuration according to the lock mechanism including the above-described main lock portion and sub lock portion is employed.

  More specifically, in the vehicle seat disclosed in Patent Document 1, the main lock portion is rotatably assembled to the plurality of main lock holes provided in the lower rail and the upper rail, and the plurality of main lock portions are rotatably mounted. A main lock arm having a main lock claw engageable with the lock hole, and a first lock for urging the main lock arm toward the lower rail in order to engage the main lock claw with any of the plurality of main lock holes A sublock arm constituted by a biasing spring and having a sublock hole provided in the lower rail, and a sublock claw rotatably assembled on the upper rail and engageable with the sublock hole. And a second biasing spring that biases the sublock arm toward the lower rail in order to engage the sublock pawl into the sublock hole. It is configured.

  Here, in the vehicle seat disclosed in Patent Document 1, when the side lever provided on the vehicle seat is operated, the main lock arm pivots against the biasing force of the first biasing spring. By doing so, the unlocking operation of the main lock portion is performed, and the sublock arm is rotated by the biasing force of the second biasing spring so that the locking operation of the sublock portion is performed.

  As a result, the sub-lock of the sub-lock arm of the sub-lock arm reaches the sub-lock hole of the lower rail by sliding movement of the seat cushion, whereby the sub-lock is inserted into the sub-lock hole. Therefore, by adopting the configuration, the user can sense that the seat cushion temporarily retracted from the original seating position has reached the predetermined retraction position.

JP 2014-94672A

  However, in the case where the configuration as disclosed in Patent Document 1 is adopted, in a state in which the side lever is operated, lock waiting is performed in which the sublock arm is pressed toward the lower rail by the biasing force of the second biasing spring. In order to shift to the state, thereafter, until the seat cushion is slid to complete the operation of the side lever, or until the seat cushion is slid to engage the sub lock pawl in the sub lock hole, The tip of the sub-locking claw always comes in contact with the lower rail.

  Along with this, when the seat cushion is slidingly moved, rubbing occurs between the tip of the sub-lock claw and the lower rail, which may cause abnormal noise, as well as the friction force associated with the rubbing. There is a problem that a large force is required due to the sliding movement of the seat cushion due to the occurrence. This problem is particularly serious in the case of the adjustment of the seating position performed with the occupant seated on the seat cushion.

  Therefore, the present disclosure has been made in view of the above-mentioned problems, and in the case of sliding in a vehicle seat in which the adjustment of the seating position by sliding and the arrangement of the seat cushion at a specific position are possible. The object of the present invention is to improve the operability and to suppress the generation of abnormal noise.

  A vehicle seat according to the present disclosure supports a fixed rail fixed to the floor of the vehicle, a seat cushion on which an occupant can be seated, and a cushion frame forming a framework of the seat cushion, and slides against the fixed rail. A movable rail that is movably assembled, a lock mechanism for locking the movable rail against the fixed rail so as not to slide relative to the fixed rail, an operating mechanism for operating the locking mechanism, the operating mechanism, and the operating mechanism And a link mechanism for operating the lock mechanism by being interposed between the lock mechanism and the lock mechanism. The lock mechanism is a main lock portion for locking the movable rail non-slidably against the fixed rail at substantially any position in at least a partial region in the sliding direction of the movable rail; And a support block for locking the movable rail against the fixed rail in a non-slidable manner at a specific position in the sliding direction of the movable rail. The link mechanism has coaxially disposed individually rotatable main links and sublinks. The main link rotates in the forward direction from the first position, which is the steady position of the main link, to unlock the main lock portion, and rotates in the reverse direction to return to the first position. Thus, the lock operation of the main lock portion is performed. The sublink performs the locking operation of the subblock by rotating in the forward direction from the second position, which is the steady position of the sublink, and rotates in the reverse direction to return to the second position. And the unlocking operation of the sublock unit is performed. The operation mechanism includes a first operation unit connected to the main link and a second operation unit connected to the sub link. The link mechanism causes the main link to follow the sub link when the sub link is rotated in the forward direction from the second position by operating the second operation unit, and the link mechanism proceeds from the first position in the forward direction. It further has an interlocking action part which makes it rotate.

  With this configuration, the main link and the sub link are configured to be able to rotate individually, so that the force generated by operating the first operation unit is the main when the first operation unit is operated. It is transmitted only to the main lock via the link and not transmitted to the sublock. Therefore, when adjusting the seating position by operating the first operation portion, the sublock portion is in the unlocked state, which can not only prevent the generation of noise but also make the seat cushion smaller. It is possible to slide by force. Therefore, the operability at the time of sliding can be improved and the generation of abnormal noise can be suppressed. In the case where the seat cushion is arranged at a specific position by operating the second operation unit, the force generated by operating the second operation unit is only transmitted to the subblock via the sub link. Instead, it is also transmitted to the main lock portion through the main link by the action of the interlocking action portion. Therefore, the sub lock portion shifts to the lock standby state, and the main lock portion shifts to the unlock state, and also in this case, it is possible to slide the seat cushion.

  In the vehicle seat according to the present disclosure, the main lock portion has a plurality of main lock holes provided in the fixed rail, and main lock claws engageable with the plurality of main lock holes. The main lock arm rotatably assembled to the movable rail, and the main lock arm facing the fixed rail to engage the main lock claw to any of the plurality of main lock holes. It is preferable to have a first biasing spring for biasing, in which case the main lock arm is pressed by the main link by the main link rotating in the forward direction. The main lock arm is pivoted in the unlocking direction against the biasing force of the first biasing spring, and the main link is pivoted in the reverse direction. More, it is preferably configured such that the main locking arm is rotated in the locking direction by the urging force of the first biasing spring by pressing the main link to the main locking arm is released. Further, in the vehicle seat based on the present disclosure, the sublock portion has a sublock hole provided in the fixed rail and a sublock claw that can be engaged with the sublock hole. A sublock arm rotatably assembled to the rail, and a second biasing force for biasing the sublock arm toward the fixed rail to engage the sublock pawl in the sublock hole. It is preferable to have a spring, and in this case, by pressing the sublink against the sublock arm by releasing the sublink in the forward direction, the second link spring is released. The sublock is rotated in the locking direction by the biasing force, and the sublink is rotated in the reverse direction, whereby the sublock arm is rotated by the sublink. It is preferred that by being pressed against the urging force of the second biasing spring is the sub lock arm is configured to rotate in the unlocking direction Te.

  With such a configuration, it is possible to configure the main lock portion and the sub lock portion capable of performing the locking operation and the unlocking operation according to the operation of the link mechanism described above with a relatively simple configuration. Become. In this case, when the seating position is adjusted by operating the first operation portion, the sublock portion is maintained in the unlocked state, so the tip end of the sublock claw is It will not be in a state of being in contact with the fixed rail, and the improvement of the operability at the time of sliding and the suppression of the generation of abnormal noise can be surely realized.

  In the vehicle seat based on the present disclosure, it is preferable that the interlocking action unit be configured by a pressing surface provided in the sub link and a pressed surface provided in the main link, In that case, in the case where the pressing surface rotates in the forward direction, the pressing surface rotates in the forward direction such that the pressing surface and the pressed surface face each other in the rotation direction of the main link and the sub link. It is preferable that the front side is directed and the pressed surface is directed to the rear side in the rotation direction of the main link when rotating in the forward direction.

  By configuring in this manner, it is possible to configure the interlocking action unit with a relatively simple configuration. In addition, by configuring in this way, when the first operation unit is operated, only the main link rotates in the forward direction, and when the second operation unit is operated, both the main link and the sub link are operated. It can be configured to rotate in the forward direction.

  In the vehicle seat according to the present disclosure, the link mechanism is configured to return the third biasing spring for returning the main link to the first position, and return the sub link to the second position. It is preferable to further have a fourth biasing spring.

  By configuring in this way, each of the main link and the sub link is reversely rotated in a relatively simple configuration when the operation of the operation mechanism is released, and the first position and the second that are steady positions are obtained. It will be possible to return to the position. Therefore, the operation of the main lock portion and the sub lock portion can be made reliable.

  In the vehicle seat based on the present disclosure, the fixed rail and the movable rail are disposed at the right and left positions of the seat cushion, and the right fixed rail and the left fixed rail, the right movable rail and the left movable A rail portion may be provided, and in this case, the main lock portion is configured to lock the right movable rail portion in a non-slidable manner with respect to the right fixed rail portion; It is preferable to have a left main lock portion for locking the left movable rail portion non-slidably with respect to the left fixed rail portion.

  With this configuration, when the main lock is in the locked state, the seat cushion is locked by the right main lock and the left main lock at the right and left portions, respectively. The stability of the seat cushion in the locked state will be increased.

  In the vehicle seat based on the present disclosure, the main link includes the right side main link corresponding to the right side main lock portion and the left side main link corresponding to the left side main lock portion. In this case, preferably, the right side main link and the left side main link are configured to rotate together by being connected by a shaft extending in the left and right direction of the seat cushion.

  With this configuration, the force generated by operating the operating mechanism can be transmitted to the right main link and the left main link with a simple configuration, and provided on the left and right sides of the vehicle seat. The movable rail can be non-slidably locked to the fixed rail on both the right and left slide rails.

  In the vehicle seat based on the present disclosure, of the right side main link and the left side main link, the seat cushion is farther from the connection position of the second operation portion to the sub link in the left-right direction of the seat cushion It is preferable that the first operation unit is connected to the main link unit.

  With this configuration, the main driving force transmission mechanism for transmitting the force generated by operating the first operation unit to the main link, and the force generated by operating the second operation unit to the sub link The sub-side driving force transmission mechanism for transmission can be distributed to the left and right positions of the vehicle seat, so that the vehicle seat can be configured more easily.

  The vehicle seat according to the present disclosure may further include a seat back that allows a passenger to backrest, in which case the first operation unit is provided on the front or side of the seat cushion. The second operating portion may have a lever provided at the top or side or rear of the seat back. In that case, the specific position at which the movable rail is locked by the support block is the sliding of the movable rail rather than the partial region where the movable rail can be locked by the main lock portion. It may be disposed on the front side in the moving direction.

  By configuring in this manner, the slide function capable of adjusting the seating position of the occupant to an arbitrary position, and the seat cushion and the seat back being temporarily retracted largely forward from the original seating position. And, it becomes possible to equip the vehicle seat with a walk-in function that can enlarge the space on the rear side of the seat back as needed.

  According to the present disclosure, in a vehicle seat configured to allow adjustment of a seating position by sliding and arrangement of a seat cushion to a specific position, improvement in operability during sliding and suppression of abnormal noise generation Will be

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic side view for demonstrating the schematic structure of the vehicle seat which concerns on embodiment, and a slide function and a walk-in function. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic perspective view which shows frame | skeleton structure of the vehicle seat which concerns on embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic perspective view of base vicinity of the vehicle seat which concerns on embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic perspective view of base vicinity of the vehicle seat which concerns on embodiment. It is a disassembled perspective view of the right side lock part of the vehicular seat concerning an embodiment. It is a schematic cross section which shows the locked state of the right side main lock part of the vehicle seat which concerns on embodiment. It is a schematic cross section which shows the lock release state of the right side main lock part of the vehicle seat concerning embodiment. It is a schematic cross section which shows the locked state of the subblock part of the vehicle seat concerning embodiment. It is a schematic cross section which shows the lock standby state of the subblock part of the vehicle seat concerning embodiment. It is a schematic cross section which shows the lock release state of the subblock part of the vehicle seat which concerns on embodiment. It is a disassembled perspective view of the left side lock part of the vehicular seat concerning an embodiment. It is a schematic cross section which shows the locked state of the left main lock part of the vehicle seat concerning embodiment. It is a schematic cross section which shows the lock release state of the left main lock part of the vehicle seat concerning embodiment. It is an exploded perspective view of a link mechanism of a vehicular seat concerning an embodiment. It is a model side view which shows the state of the link mechanism at the time of non-operation of the slide lever of the vehicle seat which concerns on embodiment, and a walk in lever, and the state of a left lock part. It is a model side view which shows the state of the link mechanism at the time of non-operation of the slide lever of the vehicle seat which concerns on embodiment, and a walk in lever, and the right side lock part. It is a model side view which shows the state of the link mechanism at the time of operation of the slide lever of the vehicle seat which concerns on embodiment, and the left side lock part. It is a model side view which shows the state of the link mechanism at the time of operation of the slide lever of the vehicle seat which concerns on embodiment, and the right side lock part. It is a model side view which shows the state of the link mechanism at the time of operation of the walk in lever of the vehicle seat which concerns on embodiment, and the right side lock part. It is a model side view which shows the state of the link mechanism at the time of completion of operation of the walk in lever of the vehicle seat which concerns on embodiment, and the state of the right side lock part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the embodiments described below, the same or common parts are denoted by the same reference numerals in the drawings, and the description thereof will not be repeated.

  The embodiment shown below illustrates the case where the present invention is applied to a vehicle seat configured as a seat of a car. The vehicle seat according to the embodiment is assumed to be installed on the floor of the vehicle so that the seated occupant faces the front side of the vehicle, and the seat longitudinal direction is one in the vehicle longitudinal direction. The seat width direction coincides with the vehicle width direction, and the seat vertical direction coincides with the vehicle vertical direction.

  In each figure, the sheet forward direction and the sheet backward direction are respectively indicated by X1 direction and X2 direction, the sheet right direction and the sheet left direction are respectively indicated by Y1 direction and Y2 direction, and the sheet upward direction and the sheet downward direction are respectively Z1 direction And in the Z2 direction. In the following, an axis coincident with the sheet forward direction X1 and the sheet backward direction X2 will be referred to as an X axis, and an axis coincident with the sheet right direction Y1 and the sheet left direction Y2 will be referred to as a Y axis. An axis coincident with the downward direction Z2 is referred to as a Z axis.

  In addition, the vehicle seat according to the embodiment is assumed to be installed on the right side of the vehicle, and the right direction of the seat corresponds to the outward direction of the vehicle (that is, the direction on the door side) and the left direction of the seat , In the vehicle inward direction (that is, the direction of the left seat side).

  FIG. 1 is a schematic side view for explaining a schematic configuration of a vehicle seat according to the embodiment and a slide function and a walk-in function. First, with reference to FIG. 1, a schematic configuration, a slide function and a walk-in function of the vehicle seat 1 according to the present embodiment will be described.

  As shown in FIG. 1, the vehicle seat 1 mainly includes a seat cushion 10, a seat back 20, a headrest 30, a base 40, a slide rail 50, a slide lever 60, and a walk-in lever 70. There is.

  The seat cushion 10 is disposed so as to be substantially parallel to the floor of the vehicle, and has a seating surface 12 on which an occupant can sit. The seat back 20 is erected upward from the rear end of the seat cushion 10, and has a backrest surface 22 on the front surface of which the occupant can backrest. The headrest 30 is assembled to the upper portion of the seatback 20.

  The base 40 supports the seat cushion 10 and is disposed below the seat cushion 10. The slide rail 50 is located below the base 40, and includes a lower rail 51 as a fixed rail and an upper rail 52 as a movable rail. Among these, the lower rail 51 is fixed to the floor of the vehicle, and the upper rail 52 is incorporated in the base 40 and is slidably (i.e., slidably) assembled to the lower rail 51.

  The slide lever 60 is mainly operated when sliding the seat cushion 10 in the longitudinal direction of the vehicle in order to adjust the seating position, and is provided rotatably on the right side portion (that is, door side) of the seat cushion 10 It is done. The walk-in lever 70 is mainly operated when the seat cushion 10 is disposed at a specific position in the longitudinal direction of the vehicle, and is rotatably provided at the rear of the seat back 20. The slide lever 60 and the walk-in lever 70 correspond to a part of an operation mechanism for operating a lock mechanism described later, and the slide lever 60 among them corresponds to a part of the first operation unit. Corresponds to a part of the second operation unit.

  The vehicle seat 1 according to the present embodiment is equipped with a slide function and a walk-in function. Here, the sliding function is a function that enables the seating position of the occupant in the front-rear direction (that is, the X-axis direction) of the vehicle to be adjusted to an arbitrary position. On the other hand, in the walk-in function, the seat cushion 10 and the seat back are moved by sliding the seat cushion 10 toward the front side of the vehicle (that is, in the X1 direction) while tilting the seat back 20 to an extent that backrest is not possible. It is a function of temporarily retracting the seat 20 from its original seating position and placing it at a specific position.

  More specifically, the vehicle seat 1 is provided with a slide function so that the center position CP of the base 40 of the vehicle seat 1 in the front-rear direction is substantially within the range of the slide movement area SR shown in the figure. The seat cushion 10 is configured to be disposed at an arbitrary position, and the base 40 is immovably locked at this position so that the position of the seat cushion 10 is fixed, whereby the seating position of the occupant can be adjusted. It is configured.

  Here, the adjustment of the seating position can be basically performed by operating the slide lever 60 while the occupant is seated on the seat cushion 10. The fixing of the seating position is performed by the right main lock 230A and the left side described later. This is realized by the main lock portion 430A (see FIGS. 3 and 4).

  On the other hand, the vehicle seat 1 is equipped with a walk-in function, whereby the specific position SP indicated in the drawing by the central position CP of the base 40 described above (the specific position SP is more than the slide movement area SR described above And the base 40 is immovably locked at the particular position SP, whereby the position of the seat cushion 10 is fixed, whereby the seat cushion 10 and the seat cushion 10 are fixed. The seatback 20 is configured to be temporarily retracted from its original seating position.

  Here, retraction of the seat cushion 10 and the seat back 20 can be basically performed by operating the walk-in lever 70 in a state where the occupant is not seated on the seat cushion 10, and at the retracted position of the seat cushion 10 Is fixed by a subblock unit 230B (see FIG. 4 etc.) described later.

  In FIG. 1, a state after the walk-in operation of the vehicle seat 1 is indicated by a broken line. When the walk-in operation is performed, the seat cushion 10 disposed at an arbitrary position within the range of the slide movement area SR described above is operated in the direction of the arrow DR1 shown in the drawing by operating the walk-in lever 70. It is possible to move towards. Further, at this time, by operating the walk-in lever 70, the seat back 20 is tilted in the direction of the arrow DR2 shown in the drawing.

  FIG. 2 is a schematic perspective view showing a framework structure of a vehicle seat according to the embodiment, and FIGS. 3 and 4 are schematic perspective views of the vicinity of a base of the vehicle seat according to the embodiment. The frame structure of the vehicle seat 1 and the configuration in the vicinity of the base 40 according to the present embodiment will be described in detail below with reference to FIGS.

  As shown in FIG. 2, the vehicle seat 1 has a cushion frame 11 forming a framework of the seat cushion 10 and a back frame 21 forming a framework of the seat back 20. The cushion frame 11 is housed inside the seat cushion 10, and the back frame 21 is housed inside the seat back 20. Each of the cushion frame 11 and the back frame 21 is configured by combining a metal plate-like member, a tubular member, and the like formed into a predetermined shape and joining them together. The back frame 21 is rotatably supported by the cushion frame 11.

  As shown in FIG. 2, a pair of slide rails 50 is disposed at the left and right positions of the vehicle seat 1. Thereby, as shown in FIGS. 2 to 4, the lower rail 51 described above is configured by the lower right rail portion 100 and the lower left rail portion 300, and the upper rail 52 described above includes the right upper rail portion 210 and the left upper rail portion 410. And is composed of. The right upper rail portion 210 is assembled to the right lower rail portion 100, and the left upper rail portion 410 is assembled to the left lower rail portion 300. The lower right rail portion 100, the upper right rail portion 210, the lower left rail portion 300, and the upper left rail portion 410 are each formed of a metal plate-like member formed into a predetermined shape.

  As shown in FIG. 2, the base 40 is located on the lower right rail portion 100, thereby supporting the right portion of the cushion frame 11 on the right leg 200 and the lower left rail portion 300, thereby providing a cushion frame And a left leg 400 that supports the left portion of the left side 11.

  As shown in FIGS. 2 to 4, the right leg 200 has the above-described right upper rail portion 210 and the right base bracket 220 fixed to the upper portion of the right upper rail portion 210, and among them, the right base bracket 220 is fixed to the right part of the cushion frame 11. The left leg 400 has the above-described left upper rail portion 410 and the left base bracket 420 fixed to the upper portion of the left upper rail portion 410, and the left base bracket 420 is a portion of the cushion frame 11 on the left side. It is fixed to Each of the right side base bracket 220 and the left side base bracket 420 is formed of a metal plate member formed into a predetermined shape.

  As shown in FIGS. 3 and 4, the right upper rail portion 210 has a rail portion 211 located on the lower side and a standing wall portion 212 located on the upper side. The rail portion 211 is slidably inserted in a guide groove 101 provided in the lower right rail portion 100. Thus, the right leg 200 is configured to be slidable by the rail portion 211 being guided by the guide groove 101. The right side base bracket 220 is fixed to the upright wall 212 so as to mainly cover the upper surface of the upright wall 212 and the side surface located on the outer side in the sheet width direction.

  On the other hand, the left upper rail portion 410 has a rail portion 411 located on the lower side and an upright wall portion 412 located on the upper side. The rail portion 411 is slidably inserted in a guide groove 301 provided in the lower left rail portion 300. Thus, the left leg 400 is configured to be able to slide by guiding the rail portion 411 by the guide groove 301. The left side base bracket 420 is fixed to the upright wall portion 412 so as to mainly cover the upper surface of the upright wall portion 412 and the side surface located on the outer side in the sheet width direction.

  The right side lock portion 230 is provided in the right side upper rail portion 210, and the left side lock portion 430 is provided in the left side upper rail portion 410. The right side lock portion 230 and the left side lock portion 430 correspond to a lock mechanism for locking the seat cushion 10 so as not to slide. The right side lock portion 230 has a right side main lock portion 230A and a subblock portion 230B, and the left side lock portion 430 has a left side main lock portion 430A.

  The right side main lock portion 230A is mainly configured by the holder 231, the right side main lock arm 232 and the first and second biasing springs 234, and the left side main lock portion 430A is the holder 431, the left side main lock arm 432 and the first It is mainly configured by the biasing spring 434. The sublock portion 230B is mainly configured by the holder 231, the sublock arm 233, and the first and second biasing springs 234.

  The right side main lock portion 230A is provided at the time of adjusting the seating position of the occupant described above, and is for locking the right upper rail portion 210 with respect to the right lower rail portion 100 so as not to slide. The left main lock portion 430A is also provided at the time of adjusting the seating position of the occupant described above, and is for locking the left upper rail portion 410 relative to the left lower rail portion 300 so as not to slide. .

  That is, the right upper rail portion 210 is locked to the right lower rail portion 100 by the right main lock portion 230A, and the left upper rail portion 410 is locked to the left lower rail portion 300 by the left main lock portion 430A. As a result, the seat cushion 10 is locked at an arbitrary position within the above-described slide movement area SR, as the slide 40 is locked so as not to slide relative to the right lower rail 100 and the left lower rail 300.

  Here, a plurality of main lock holes 102 are provided along the extending direction of the right lower rail portion 100 on an inner side surface located inside of the guide groove 101 provided in the right lower rail portion 100 in the seat width direction. (See Figure 4). The plurality of main lock holes 102 are configured such that the main lock claws 232b (see FIG. 5 etc.) provided on the right side main lock arm 232 of the right side main lock portion 230A can be inserted. By inserting the main lock claw 232 b into any of the holes 102, the right upper rail portion 210 is locked to the right lower rail portion 100.

  Further, a plurality of main lock holes 302 are provided along the extending direction of the left lower rail portion 300 on an inner side surface located inside of the guide groove 301 provided in the left lower rail portion 300 in the seat width direction ( See Figure 3). The plurality of main lock holes 302 are configured to be insertable with the main lock claws 432b (see FIG. 11 etc.) provided on the left main lock arm 432 of the left main lock portion 430A. By inserting the main lock claws 432 b into any of the holes 302, the left upper rail portion 410 is locked with respect to the left lower rail portion 300.

  On the other hand, the sublock portion 230B is provided when the seat cushion 10 and the seat back 20 are temporarily retracted from the above-described original seating position, and the right upper rail portion 210 is slid relative to the right lower rail portion 100. It is for locking immovably.

  That is, by locking the right upper rail portion 210 with respect to the right lower rail portion 100 by the subblock portion 230B, the base 40 is locked against sliding movement with respect to the right lower rail portion 100. The seat cushion 10 is fixed at a specific position SP.

  Here, a sub lock hole 103 is provided on the inner side surface of the guide groove 101 provided in the right lower rail portion 100, which is located inside in the seat width direction (see FIG. 4). The sub lock hole 103 is configured such that a sub lock claw 233b (see FIG. 5 and the like) provided in the sub lock arm 233 of the sub lock portion 230B can be inserted. The right upper rail portion 210 is locked with respect to the right lower rail portion 100 by the insertion of 233 b.

  The detailed configurations and operations of the right side main lock portion 230A, the left side main lock portion 430A and the subblock portion 230B will be described in detail later.

  As shown in FIG. 2, the vehicle seat 1 includes the slide lever 60 and the walk-in lever 70 corresponding to a part of the operation mechanism described above, the right side main lock portion 230A as the lock mechanism described above, and the left side main lock portion 430A. Between the right main lock 230A, the left main lock 430A, and the sub lock 230B according to the operation when the slide lever 60 or the walk-in lever 70 is operated. The link mechanism 500 which makes each operate.

  As shown in FIGS. 3 and 4, the link mechanism 500 is constituted by various components assembled to the right leg 200 and the left leg 400, whereby the link mechanism 500 is interposed between the right leg 200 and the left leg 400. The main part is arranged in the space.

  Link mechanism 500 includes right main support bracket 501 and right sub support bracket 503 fixed to right base bracket 220 of right leg 200, and right main link 520 assembled to an inner portion in the seat width direction of right leg 200. , A sub link 540, a third biasing spring 550, a sub cable 570, and a fourth biasing spring 580.

  Link mechanism 500 includes left main support bracket 502 fixed to left base bracket 420 of left leg 400, and left main link 530 and main cable 560 assembled to an inner portion in the seat width direction of left leg 400. And.

  Further, the link mechanism 500 has a shaft 510 provided to bridge the inner portion in the seat width direction of the right leg 200 and the inner portion in the seat width direction of the left leg 400.

  The detailed configuration and operation of the link mechanism 500 will be described in detail later.

  FIG. 5 is an exploded perspective view of the right side lock portion of the vehicle seat according to the embodiment. Next, with reference to FIG. 5, the assembly structure of the right lock portion 230 of the vehicle seat 1 according to the present embodiment will be described in detail.

  As shown in FIG. 5, the right upper rail portion 210 includes a plurality of rollers 213 provided on the rail portion 211 in addition to the rail portion 211 and the upright wall portion 212 described above. The plurality of rollers 213 are rotatably assembled to an inner portion and an outer portion of the rail portion 211 in the seat width direction, and are accommodated in the guide groove 101 of the lower right rail portion 100. Thus, the right upper rail portion 210 can slide smoothly with respect to the right lower rail portion 100.

  A front opening 214 and a rear opening 215 are provided at predetermined positions of the right upper rail portion 210. The front opening 214 and the rear opening 215 are portions in which the right main lock arm 232 and the sub lock arm 233 are accommodated, respectively, and they are provided so as to penetrate the upright wall 212 along the sheet width direction. .

  Further, a main lock hole 216 is provided in a portion in the seat width direction of the rail portion 211 in a portion facing the front opening 214, and the seat width direction of the rail portion 211 in a portion facing the rear opening 215. The subblock hole 217 is provided in the inner part of the. The main lock hole 216 and the sub lock hole 217 are provided corresponding to the main lock hole 102 and the sub lock hole 103 provided in the lower right rail portion 100, respectively, and the main lock claws 232b and The block claw 233b is configured to be insertable.

  Here, even if the main lock holes 216 and the sub lock holes 217 are not provided, the main lock claws 232 b and the sub lock claws 233 b are inserted into the main lock holes 102 and the sub lock holes 103 described above, respectively. Although it is possible to lock 210 to the right lower rail portion 100, the main lock claws 232b and the sublock claws 233b are further inserted into the main lock hole 216 and the sublock hole 217 in the locked state, as described later. It is possible to prevent an excessive force from being applied to the right main lock arm 232 and the mounting position of the sub lock arm 233 with the holder 231.

  The right side lock portion 230 is mainly configured by the holder 231, the right side main lock arm 232, the sub lock arm 233, and the first and second biasing springs 234, as described above.

  The holder 231 is a member for holding the right main lock arm 232, the sub lock arm 233, and the first and second biasing springs 234, and the right side of the upper rail portion 210 so as to cover the front opening 214 and the rear opening 215. It is fixed to the inner side in the sheet width direction. The holder 231 has receiving portions for receiving and holding the right main lock arm 232 and the sublock arm 233 at portions facing the front opening 214 and the rear opening 215, respectively. A pair of convex part 231a and convex part 231b which oppose are each provided. The holder 231 is formed of a metal plate-like member formed into a predetermined shape.

  The right main lock arm 232 is formed of a metal plate-like member formed into a predetermined shape, and has an arm lever 232a, a main lock claw 232b, a pair of recessed portions 232c, and a tab 232d. ing. Each of the arm lever 232a, the main lock claw 232b, the pair of recesses 232c, and the tab 232d is formed by bending or cutting a predetermined portion of a metal plate member.

  The arm lever 232a is disposed so as to project inward in the seat width direction from the inner portion in the seat width direction of the right upper rail portion 210 after assembly, and the pivot arm 521 of the right main link 520 of the link mechanism 500. It is a part to be pressed by (see FIG. 14 etc.). As described above, the main lock claw 232b is a portion inserted into the main lock hole 102 of the lower right rail portion 100 and the main lock hole 216 of the upper right rail portion 210 in the locked state. In the present embodiment, the three main lock claws 232b are provided on the right side main lock arm 232 so as to be aligned with each other.

  The pair of concave portions 232 c is a portion for receiving the pair of convex portions 231 a provided in the holder 231 so that the right main lock arm 232 is rotatably held by the holder 231 after assembly. . The tab 232 d is a portion for setting a predetermined portion of the first and second biasing springs 234 to be hooked to the right main lock arm 232 after assembly.

  The sublock arm 233 is formed of a metallic plate-like member formed into a predetermined shape, and includes an arm lever 233a, a sublock pawl 233b, a pair of concave portions 233c, and a tab 233d. There is. Each of the arm lever 233a, the sub-lock claw 233b, the pair of recesses 233c, and the tab 233d is formed by bending or cutting a predetermined portion of a metal plate member. In the present embodiment, only one sub-lock claw 233 b is provided on the sub-lock arm 233.

  The arm lever 233a is arranged so as to project inward in the seat width direction from the inner portion in the seat width direction of the right upper rail portion 210 after assembly, and the pivot arm 541 of the sub link 540 of the link mechanism 500 ( It is a part for pressing according to FIG. 14 etc.). As described above, the sablock claw 233b is a portion inserted into the sublock hole 103 of the lower right rail portion 100 and the sublock hole 217 of the upper right rail portion 210 in the locked state.

  The pair of concave portions 233 c is a portion for receiving the pair of convex portions 231 b provided in the holder 231 so that the sublock arm 233 is rotatably held by the holder 231 after assembly. The tab 233 d is a portion for setting a predetermined portion of the first and second biasing springs 234 to be hooked to the sublock arm 233 after assembly.

  The first and second biasing springs 234 are each formed of a torsion spring formed into a predetermined shape, and have a first biasing portion 234a and a second biasing portion 234b in which a metal wire is spirally wound. doing. The first biasing portion 234a is a portion functioning as a first biasing spring for biasing the right main lock arm 232 after assembly, and the second biasing portion 234b is a sublock arm after assembly. It is a part that functions as a second biasing spring for biasing 233.

  When assembling the right lock portion 230, the right main lock arm 232 and the sub lock arm 233 are in a state in which the first and second biasing springs 234 are hooked on these, and further, each is provided in the holder 231 It is assembled to the receptacle. At that time, a pair of recesses 232 c provided in the right main lock arm 232 and a pair of recesses 233 c provided in the sub lock arm 233 are respectively provided in a pair of protrusions 231 a and a pair of protrusions 231 b provided in the holder 231. Then, predetermined portions of the first and second biasing springs 234 are hooked on tabs 232 d and 233 d provided on the right main lock arm 232 and the sub lock arm 233, respectively.

  Next, the holder 231 on which the right main lock arm 232, the sublock arm 233 and the first and second biasing springs 234 are attached is applied to the inner side surface of the right upper rail portion 210 in the seat width direction, A plurality of pins 235 and a plurality of caps 236 engaged with the pins 231 are fixed to the upright wall 212 of the right upper rail 210. At this time, predetermined portions of the first and second biasing springs 234 are fixed to the standing wall portion 212 of the right upper rail portion 210 by the plurality of pins 235 and the plurality of caps 236.

  As described above, the right main lock arm 232 and the sub lock arm 233 are assembled to the right upper rail portion 210 in a state of being biased in a predetermined direction, whereby the right lock portion 230 is provided to the right leg 200.

  6 and 7 are schematic cross-sectional views showing the locked state and the unlocked state of the right main lock portion of the vehicle seat according to the embodiment. Next, the configuration and operation of the right side main lock portion 230A of the vehicle seat 1 according to the present embodiment will be described in detail with reference to FIGS. 5 and 6.

  As shown in FIGS. 6 and 7, the right side main lock portion 230A is configured to have its right side main lock arm 232 pivotable by having the above-described assembly structure. More specifically, the right main lock arm 232 is held by the holder 231 so as to be rotatable around the rotation axis O1 about the rotation axis O1 extending in the X-axis direction.

  Here, as shown in FIG. 6, the right main lock arm 232 is urged in the direction of the arrow AR11 shown in the figure by the urging force of the first urging portion 234a of the first and second urging springs 234. ing. Therefore, when the seat cushion 10 is in the range of the slide movement area SR described above and the arm lever 232a is not pressed by the pivoting arm 521 of the right main link 520 of the link mechanism 500, the right main The main lock claws 232 b of the lock arm 232 are respectively inserted into the main lock hole 102 provided in the lower right rail portion 100 and the main lock hole 216 provided in the right upper rail portion 210.

  Thus, in a state where the arm lever 232a is not pressed by the pivot arm 521 of the right main link 520, a locked state in which the right upper rail portion 210 is locked to the right lower rail portion 100 is realized. The slide movement of the right upper rail portion 210 along the X-axis direction is restricted. Therefore, when the right side main lock portion 230A is in the locked state, the movement of the seat cushion 10 is limited.

  On the other hand, as shown in FIG. 7, with the right main lock arm 232, the arm lever 232a is pressed by the pivoting arm 521 of the right main link 520 of the link mechanism 500 in the direction of the arrow DR101 shown in the figure. Then, it is pivoted in the direction of the arrow DR102 shown in the figure against the biasing force of the first biasing portion 234a of the first and second biasing springs 234. Along with this rotation, the main lock claws 232b of the right side main lock arm 232 come out of the main lock hole 102 provided in the right lower rail portion 100 and the main lock hole 216 provided in the right upper rail portion 210, respectively.

  Thus, in the state where the arm lever 232a is pressed by the pivoting arm 521 of the right main link 520, the unlocked state in which the right upper rail portion 210 is not locked to the right lower rail portion 100 is realized. The slide movement of the right upper rail portion 210 along the X-axis direction is not restricted. Therefore, when the right side main lock portion 230A is in the unlocked state, the movement of the seat cushion 10 is not restricted at least by the right side main lock portion 230A.

  Thus, in the vehicle seat 1 according to the present embodiment, when the right side main lock portion 230A is in the locked state, the movement of the seat cushion 10 is limited, and the right side main lock portion 230A is locked. In the released state, the movement of the seat cushion 10 is not restricted at least by the right side main lock portion 230A.

  8 to 10 are schematic cross-sectional views showing the lock state, the lock standby state, and the lock release state of the subblock portion of the vehicle seat according to the embodiment. Next, with reference to these FIGS. 8 to 10, the configuration and operation of the subblock portion 230B of the vehicle seat 1 according to the present embodiment will be described in detail.

  As shown in FIGS. 8 to 10, the sublock portion 230B has the above-described assembly structure, and thus the sublock arm 233 is configured to be rotatable. More specifically, the support arm 233 is held by the holder 231 so as to be rotatable around the rotation axis O2 about the rotation axis O2 extending in the X-axis direction.

  Here, as shown in FIG. 8, the sublock arm 233 is urged in the direction of the arrow AR21 shown in the figure by the urging force of the second urging portion 234b of the first and second urging springs 234. There is. Therefore, when the seat cushion 10 is at the above-described specific position SP and the arm lever 233a is not pressed by the pivot arm 541 of the sub link 540 of the link mechanism 500, the support arm of the sublock arm 233 is supported. The block claws 233 b are respectively inserted into the sub lock hole 103 provided in the lower right rail portion 100 and the sub lock hole 217 provided in the upper right rail portion 210.

  Thus, in a state where the arm lever 233a is not pressed by the pivot arm 541 of the sub link 540, a locked state in which the right upper rail portion 210 is locked with respect to the right lower rail portion 100 is realized. The sliding movement of the upper rail portion 210 in the X-axis direction is restricted. Therefore, when the sublock portion 230B is in the locked state, the movement of the seat cushion 10 is limited.

  In the case where the arm lever 233a is not pressed by the pivot arm 541 of the sub link 540 of the link mechanism 500 as shown in FIG. 9 and the seat cushion 10 is not at the specific position SP described above. The tip end of the sublock 233b of the sublock arm 233 of the guide groove 101 provided in the lower right rail portion 100 with the above-mentioned biasing force of the second biasing portion 234b of the first and second biasing springs 234. It will be in contact with the inner side surface located inside in the sheet width direction.

  On the other hand, as shown in FIG. 10, in the sublock arm 233, the arm lever 233a is pressed by the pivot arm 541 of the sub link 540 of the link mechanism 500 in the direction of the arrow DR201 shown in FIG. It turns in the direction of arrow DR 202 shown in the figure against the biasing force of the second biasing portion 234 b of the one and second biasing spring 234. Along with this rotation, the sublock pawls 233b of the sublock arm 233 come out of the sublock hole 103 provided in the right lower rail portion 100 and the sublock hole 217 provided in the right upper rail portion 210, respectively.

  Thus, in the state where the arm lever 233a is pressed by the pivoting arm 541 of the sub link 540, the unlocked state in which the right upper rail portion 210 is not locked to the right lower rail portion 100 is realized. The sliding movement of the right upper rail portion 210 along the X-axis direction is not restricted. Therefore, when the subblock portion 230B is in the unlocked state, the movement of the seat cushion 10 is not restricted by at least the subblock portion 230B.

  As described above, in the vehicle seat 1 according to the present embodiment, the movement of the seat cushion 10 is restricted when the subblock portion 230B is in the locked state, and the subblock portion 230B is in the unlocked state. In the above case, the movement of the seat cushion 10 is not restricted at least by the sublock portion.

  FIG. 11 is an exploded perspective view of the left lock portion of the vehicle seat according to the embodiment. Next, with reference to this FIG. 11, the assembly structure of the left side lock portion 430 of the vehicle seat 1 according to the present embodiment will be described in detail.

  As shown in FIG. 11, the left upper rail portion 410 has a plurality of rollers 413 provided on the rail portion 411 in addition to the rail portion 411 and the upright wall portion 412 described above. The plurality of rollers 413 are rotatably assembled to an inner portion and an outer portion of the rail portion 411 in the seat width direction, and are accommodated in the guide groove 301 of the left lower rail portion 300. Thus, the left upper rail portion 410 can slide smoothly with respect to the left lower rail portion 300.

  An opening 414 is provided at a predetermined position of the left upper rail portion 410. The opening 414 is a portion where the left main lock arm 432 is accommodated, and is provided to penetrate the upright wall portion 412 along the seat width direction.

  Further, a main lock hole 416 is provided in a portion in the seat width direction of the rail portion 411 in a portion facing the opening 414. The main lock hole 416 is provided corresponding to the main lock hole 302 provided in the lower left rail portion 300, and is configured such that a main lock claw 432b described later can be inserted.

  Here, even if the main lock hole 416 is not provided, the left upper rail portion 410 can be locked to the left lower rail portion 300 by inserting the main lock claw 432 b into the above-described main lock hole 302. However, when the main lock claw 432b is further inserted into the main lock hole 416 in the locked state, it is possible to prevent an excessive force from being applied to the assembly portion of the left main lock arm 432 described later with respect to the holder 431. it can.

  The left side lock portion 430 is mainly configured by the holder 431, the left side main lock arm 432 and the first biasing spring 434 as described above.

  The holder 431 is a member for holding the left main lock arm 432 and the first biasing spring 434, and is fixed to the inner side surface in the seat width direction of the left upper rail portion 410 so as to cover the opening 414. The holder 431 has a receiving portion for receiving and holding the left main lock arm 432 at a portion facing the opening 414, and the receiving portion is provided with a pair of convex portions 431a facing each other. The holder 431 is formed of a metal plate-like member formed into a predetermined shape.

  The left main lock arm 432 is formed of a metal plate-like member formed into a predetermined shape, and has an arm lever 432a, a main lock claw 432b, a pair of recessed portions 432c, and a tab 432d. ing. The arm levers 432a, the main lock claws 432b, the pair of recesses 432c, and the tabs 432d are formed by bending or cutting a predetermined portion of a metal plate member.

  The arm lever 432a is disposed so as to protrude inward in the seat width direction from the inner portion in the seat width direction of the left upper rail portion 410 after assembly, and the pivot arm 531 of the left main link 530 of the link mechanism 500. It is a part to be pressed by (see FIG. 14 etc.). As described above, the main lock claw 432b is a portion inserted into the main lock hole 302 of the left lower rail portion 300 and the main lock hole 416 of the left upper rail portion 410 in the locked state. In the present embodiment, the three main lock claws 432b are provided on the left main lock arm 432 so as to be aligned with each other.

  The pair of concave portions 432 c is a portion for receiving the pair of convex portions 431 a provided in the holder 431 so that the left main lock arm 432 can be rotatably held by the holder 431 after assembly. . The tab 432 d is a portion for setting a predetermined portion of the first biasing spring 434 to be hooked to the left main lock arm 432 after assembly.

  The first biasing spring 434 is a torsion spring formed into a predetermined shape, and is formed by spirally winding a metal wire. The first biasing spring 434 is for biasing the left main lock arm 432 after assembly.

  When assembling the left lock portion 430, the left main lock arm 432 is in a state in which the first biasing spring 434 is assembled to the left main lock arm 432, and is assembled to a receiving portion provided in the holder 431. At that time, the pair of concave portions 432 c provided in the left main lock arm 432 is fitted into the pair of convex portions 431 a provided in the holder 431, and the predetermined portion of the first biasing spring 434 is in the left main lock arm 432. It is hooked on the provided tab 432d.

  Next, the holder 431 to which the left main lock arm 432 and the first biasing spring 434 are attached is applied to the inner side surface of the left upper rail portion 410 in the seat width direction, and the holder 431 is a plurality of pins 435 and this Are fixed to the upstanding wall portion 412 of the left upper rail portion 410 by a plurality of caps 436 engaging with each other. At this time, a predetermined portion of the first biasing spring 434 is fixed to the upright wall portion 412 of the left upper rail portion 410 by the plurality of pins 435 and the plurality of caps 436.

  Thus, the left main lock arm 432 is assembled to the left upper rail portion 410 in a state of being biased in a predetermined direction, whereby the left lock portion 430 is provided to the left leg 400.

  12 and 13 are schematic cross-sectional views showing the locked state and the unlocked state of the left main lock portion of the vehicle seat according to the embodiment. Next, with reference to FIGS. 12 and 13, the configuration and operation of left main lock portion 430A of vehicle seat 1 according to the present embodiment will be described in detail.

  As shown in FIGS. 12 and 13, the left main lock portion 430A is configured to be pivotable by having the above-described assembly structure. More specifically, the left main lock arm 432 is held by the holder 431 so as to be rotatable around the rotation axis O3 around the rotation axis O3 extending in the X-axis direction.

  Here, as shown in FIG. 12, the left main lock arm 432 is urged in the direction of the arrow AR31 shown in the figure by the urging force of the first urging spring 434. Therefore, when the seat cushion 10 is within the range of the slide movement area SR described above and the arm lever 432a is not pressed by the pivoting arm 531 of the left main link 530 of the link mechanism 500, the left main The main lock claws 432 b of the lock arm 432 are respectively inserted into the main lock hole 302 provided in the left lower rail portion 300 and the main lock hole 416 provided in the left upper rail portion 410.

  Thus, in a state where the arm lever 432a is not pressed by the pivot arm 531 of the left main link 530, a locked state in which the left upper rail portion 410 is locked with respect to the left lower rail portion 300 is realized. The slide movement of the left upper rail portion 410 along the X-axis direction is restricted. Therefore, when the left main lock portion 430A is in the locked state, the movement of the seat cushion 10 is limited.

  On the other hand, as shown in FIG. 13, in the left main lock arm 432, the arm lever 432 a is pressed by the pivoting arm 531 of the left main link 530 of the link mechanism 500 in the direction of arrow DR 301 shown in the figure. And turns in the direction of an arrow DR 302 shown in the figure against the biasing force of the first biasing spring 434. With this rotation, the main lock claws 432b of the left main lock arm 432 are respectively removed from the main lock hole 302 provided in the left lower rail portion 300 and the main lock hole 416 provided in the left upper rail portion 410.

  Thus, in the state where the arm lever 432a is pressed by the pivoting arm 531 of the left main link 530, the unlocked state where the left upper rail portion 410 is not locked with respect to the left lower rail portion 300 is realized. The sliding movement of the left upper rail portion 410 along the X-axis direction is not restricted. Therefore, when the left main lock portion 430A is in the unlocked state, the movement of the seat cushion 10 is not restricted at least by the left main lock portion 430A.

  As described above, in the vehicle seat 1 according to the present embodiment, the movement of the seat cushion 10 is restricted when the left main lock portion 430A is in the locked state, and the left main lock portion 430A is locked. In the released state, the movement of the seat cushion 10 is not restricted at least by the left main lock portion 430A.

  FIG. 14 is an exploded perspective view of the link mechanism of the vehicle seat according to the embodiment. Next, with reference to FIG. 14, the assembling structure of the link mechanism 500 of the vehicle seat 1 according to the present embodiment will be described in detail.

  As shown in FIG. 14, the link mechanism 500 is constituted by the right main support bracket 501, the left main support bracket 502, the right sub support bracket 503, and various components assembled to these support brackets 501 to 503. There is. As described above, the various components referred to here include the shaft 510, the right main link 520, the left main link 530, the sub link 540, the third biasing spring 550, the main cable 560, the sub cable 570, and the fourth biasing. The spring 580 is included.

  Among them, the shaft 510, the right side main link 520, the left side main link 530, and the sub link 540 all have a forward direction with a central axis (rotational axis O4 described later) of the shaft 510 as a rotation center when the operation mechanism is operated. It rotates in the reverse direction. Here, the forward direction is a direction that rotates counterclockwise when viewing these members along the Y1 direction, and the reverse direction rotates clockwise when viewing these members along the Y1 direction It is a direction.

  The right side main support bracket 501 is fixed to the right side base bracket 220 of the right side leg 200 by welding, fastening or the like, and is formed of a metal plate-like member formed into a predetermined shape. The right main support bracket 501 has a shaft support hole 501a for rotatably supporting the right end of the shaft 510, a holding portion 501b for holding the sub cable 570, and one end of a third biasing spring 550. A locking portion 501c for locking and a stopper portion 501d for limiting reverse rotation of the sub link 540 are included.

  The left main support bracket 502 is fixed to the left base bracket 420 of the left leg 400 by welding, fastening or the like, and is formed of a metal plate member formed into a predetermined shape. The left main support bracket 502 has a pivot hole 502 a for rotatably supporting the left end of the shaft 510, a holding portion 502 b for holding the main cable 560, and a reverse rotation of the left main link 530. And a stopper portion 502d for limiting the

  The right sub support bracket 503 is fixed to the right base bracket 220 of the right leg 200 by welding, fastening, or the like, and is formed of a metal plate member formed into a predetermined shape. The right sub support bracket 503 is for latching one end of the fourth biasing spring 580.

  The shaft 510 is configured such that the right side main link 520 and the left side main link 530 rotate together by connecting the right side main link 520 and the left side main link 530, and the seat width direction (that is, the Y axis direction). Is disposed extending along the More specifically, the shaft 510 is rotatably held at its right end and left end by the axial support hole 501a of the right main support bracket 501 and the axial support hole 502a of the left main support bracket 502, respectively. The rotation axis O4 is configured to be rotatable around the rotation axis O4 (see FIG. 15 and the like) extending in the Y-axis direction. The shaft 510 is formed of a metal tubular member formed into a predetermined shape.

  At the right end of the shaft 510, the right main link 520, the sub link 540, the ring 511 and the third biasing spring 550 are assembled sequentially from inside. The right main link 520 is fixed to the shaft 510 so as to rotate with the shaft 510, and the sub link 540 is loosely fitted to the shaft 510 so as not to rotate with the shaft 510. The ring 511 is fixed to the shaft 510 to secure a distance between the right main support bracket 501 and the sub link 540, thereby forming a space in which the third biasing spring 550 is assembled. . The ring 511 also sandwiches the sub link 540 with the right main link 520 so that the sub link 540 does not move along the axial direction of the shaft 510.

  At the left end of the shaft 510, the left main link 530 and the ring 512 are assembled sequentially from the inside. The left main link 530 is fixed to the shaft 510 so as to rotate with the shaft 510. The ring 512 is fixed to the shaft 510 to secure a distance between the left main support bracket 502 and the left main link 530.

  The right side main link 520 is formed of a metal plate-like member formed into a predetermined shape, and the pivoting arm 521 protruding outward in the radial direction, the hooking portion 523 and the butting portion 525 have. The pivoting arm 521 is a portion for pressing the arm lever 232 a of the right side main lock arm 232 of the right side main lock portion 230 A described above, and the hooking portion 523 is the above-described one end of the third biasing spring 550. It is a part for hooking the other end located on the opposite side. The abutment portion 525 is a portion for limiting the reverse rotation of the right main link 520 by abutting on the pressing portion 545 of the sub link 540. Since the right side main link 520 is configured to rotate together with the shaft 510 as described above, the pivoting arm 521 rotates with the rotation of the shaft 510 after assembly.

  The left main link 530 is formed of a metal plate-like member formed into a predetermined shape, and includes a pivoting arm 531 protruding outward in the radial direction, a holding hole 532, and a butting portion 535. Have. The pivoting arm 531 is a portion for pressing the arm lever 432a of the left main lock arm 432 of the left main lock portion 430A described above, and the holding hole 532 is a portion for rotatably holding one end of the main cable 560. is there. The abutment portion 535 is a portion for limiting the reverse rotation of the left main link 530 by abutting on the stopper portion 502 d of the left main support bracket 502. Since the left main link 530 is configured to rotate with the shaft 510 as described above, the pivoting arm 531 rotates with the rotation of the shaft 510 after assembly.

  The sub link 540 is formed of a metal plate-like member formed into a predetermined shape, and the pivot arm 541 protruding outward in the radial direction, the holding hole 542, and the hooking portion 543; It has an abutting portion 544 and a pressing portion 545. The pivoting arm 541 is a portion for pressing the arm lever 233a of the sublock arm 233 of the sublock portion 230B described above, and the holding hole 542 is a portion for rotatably holding one end of the sub cable 570. The hooking portion 543 is a portion for hooking the other end of the fourth biasing spring 580 opposite to the above-described one end, and the butting portion 544 is a portion on the stopper portion 501 d of the right main support bracket 501. The contact is a portion for limiting the reverse rotation of the sub link 540. The pressing portion 545 is a portion for limiting the reverse rotation of the right main link 520 by coming into contact with the abutment portion 525 of the right main link 520, and the details thereof will be described later. At the time of operation, it is also a part for interlocking the right main link 520 with the rotation of the sub link 540. Since the sub link 540 is configured to be rotatable by being loosely fitted to the shaft 510 as described above, after assembly, the pivoting arm 541 is also rotated by the rotation of the sub link 540. It will be done.

  The third biasing spring 550 is a torsion spring formed into a predetermined shape, and is formed by spirally winding a metal wire. The third biasing spring 550 is attached to the right end of the shaft 510, and one end and the other end are hooked to the hooking portion 501c of the right main support bracket 501 and the hooking portion 523 of the right main link 520, respectively. . Thereby, the third biasing spring 550 biases the right main link 520 in a predetermined rotational direction (specifically, the reverse direction) after assembly.

  The main cable 560 includes a tube-shaped outer cable 561 and a wire-shaped inner cable 562, and the inner cable 562 is configured to pass through the inside of the outer cable 561. One end of the outer cable 561 is held by the holding portion 502b of the left main support bracket 502 described above, and one end of the inner cable 562 is rotatably held by the holding hole 532 of the left main link 530 described above.

  Here, the other end of the inner cable 562 opposite to the one end is connected to the slide lever 60 which is a part of the first operation portion. Thereby, when the slide lever 60 is operated, the inner cable 562 is pulled, and a force generated by the operation of the slide lever 60 causes the left main link 530 to rotationally drive. The driving force is transmitted to the left main link 530. That is, the main cable 560 corresponds to a main side driving force transmission mechanism for transmitting the force generated by operating the slide lever 60 to the left main link 530.

  The sub cable 570 includes a tube-shaped outer cable 571 and a wire-shaped inner cable 572, and the inner cable 572 is configured to pass through the inside of the outer cable 571. One end of the outer cable 571 is held by the holding portion 501b of the right main support bracket 501 described above, and one end of the inner cable 572 is rotatably held by the holding hole 542 of the sub link 540 described above.

  Here, the other end of the inner cable 572 opposite to the one end is connected to the back frame 21 of the seat back 20. Since the seat back 20 is tilted forward by operating the walk-in lever 70 which is a part of the second operation unit as described above, when the walk-in lever 70 is operated. In this case, the inner cable 572 is pulled by tilting the seat back 20 to the front side, and the force generated by tilting the seat back 20 by operating the walk-in lever 70 It is transmitted to the sub link 540 as a driving force for rotationally driving the sub link 540. That is, the sub cable 570 corresponds to a sub drive power transmission mechanism for transmitting the force generated by operating the walk in lever 70 to the right main link 520, and the back frame 21 of the seat back 20 is a walk in lever 70 together with the second operation unit.

  The fourth biasing spring 580 is a tension coil spring formed into a predetermined shape, and is formed by spirally winding a metal wire. One end and the other end of the fourth biasing spring 580 are hooked on the hooks 543 of the right sub support bracket 503 and the sub link 540, respectively. Thus, the fourth biasing spring 580 biases the sub link 540 in a predetermined rotational direction (specifically, the reverse direction) after assembly.

  When assembling the link mechanism 500, the right main support bracket 501 and the right sub support bracket 503 are fixed in advance to the right base bracket 220 of the right leg 200, and the left main support bracket is fixed to the left base bracket 420 of the left leg 400. 502 is fixed. In addition, the right main end 520, the sub link 540, the ring 511 and the third biasing spring 550 are previously assembled to the right end of the shaft 510, and the left main link 530 and the ring 512 are formed at the left end. Will be assembled.

  Then, the shaft 510 on which the right side main link 520, the left side main link 530, the sub link 540 and the like are assembled is assembled so as to bridge the right side main support bracket 501 and the left side main support bracket 502. Thereafter, the main cable 560 is fixed to the left main support bracket 502 and the left main link 530, and the sub cable 570 is fixed to the right main support bracket 501 and the sub link 540, and the third biasing spring 550 One end and the other end and one end and the other end of the fourth biasing spring 580 are assembled by being hooked to a predetermined portion.

  As described above, with the right main link 520 and the left main link 530 connected to each other via the shaft 510 and the sub link 540 loosely fitted to the shaft 510, the right leg 200 is biased in a predetermined direction. And the left leg 400, so that the link mechanism 500 is provided on the base 40.

  FIG. 15 is a schematic side view showing the state of the link mechanism and the left lock portion when the slide lever and the walk-in lever of the vehicle seat according to the embodiment are not operated, and FIG. 17 is the slide lever and the walk-in It is a model side view which shows the state of the link mechanism at the time of non-operation of a lever, and a right side lock part. FIG. 17 is a schematic side view showing the state of the link mechanism and the left lock portion when the slide lever of the vehicle seat according to the embodiment is operated, and FIG. 18 is the link mechanism and the right side when the slide lever is operated. It is a model side view which shows the state of a lock part. FIGS. 19 and 20 are schematic side views showing the state of the link mechanism and the right lock when the walk-in lever of the vehicle seat according to the embodiment is operated and when the operation of the walk-in lever is completed. Hereinafter, with reference to FIGS. 15 to 20, the operation of the vehicle seat 1 according to the present embodiment will be described in detail.

  As shown in FIGS. 15 to 20, the link mechanism 500 has the assembling structure described above, so that the right main link 520 and the left main link 530 fixed to each other via the shaft 510 and the shaft 510 can be loosely fitted. The sublinks 540 are arranged coaxially (that is, on the rotation axis O4) so as to be rotatable individually. The right side main link 520 and the left side main link 530, which are fixed to each other via the shaft 510, are connected to the slide lever 60 which is a part of the first operation unit via the main cable 560. The fitted sub link 540 is connected to the back frame 21 which is a part of the second operation unit via the sub cable 570.

  Here, as described above, the vehicle seat 1 according to the present embodiment is equipped with the slide function and the walk-in function, and operates the slide lever 60 and the operation of the walk-in lever 70 that constitute the operation mechanism. At the same time, the link mechanism 500 performs different operations, and accordingly, the right side main lock portion 230A, the left main lock portion 430A, and the subblock portion 230B as the lock mechanisms also perform different operations.

  First, the states of the link mechanism 500 and the lock mechanism when the slide lever 60 and the walk-in lever 70 are not operated will be described with reference to FIGS. 15 and 16. Here, in the state shown in FIGS. 15 and 16, the position of the seat cushion 10 is fixed within the range of the slide movement area SR of the seat cushion 10.

  As shown in FIGS. 15 and 16, when the slide lever 60 and the walk-in lever 70 are not operated, neither the inner cable 562 of the main cable 560 nor the inner cable 572 of the sub cable 570 is pulled. .

  Therefore, when slide lever 60 and walk-in lever 70 are not operated, right main link 520 and left main link 530 are urged in the direction of arrow AR41 shown in the figure by the urging force of third urging spring 550. And the left main link 520 and the left main link 530 are at steady positions in the rotational direction, respectively, by the abutment portion 535 of the left main link 530 being in contact with the stopper portion 502d of the left main support bracket 502. It is arranged in one position.

  Thus, in a state where the right side main link 520 and the left side main link 530 are arranged at the first position, the pivoting arm 521 of the right side main link 520 is an arm lever of the right side main lock arm 232 of the right side main lock portion 230A. The state in which the left main link 530 is not pressed is not in the state of pressing the arm lever 432a of the left main lock arm 432 of the left main lock portion 430A.

  Therefore, both the right side main lock portion 230A and the left side main lock portion 430A are in the locked state (that is, the states shown in FIGS. 6 and 12), and the main lock claw 232b of the right side main lock arm 232 is in the right lower rail portion 100. The main lock hole 432 is inserted into the main lock hole 216 of the right upper rail portion 210 and the main lock claw 432 b of the left main lock arm 432 is inserted into the main lock hole 302 of the left lower rail portion 300 and the main lock hole 416 of the left upper rail portion 410. It will be inserted in the

  When the slide lever 60 and the walk-in lever 70 are not operated, the sub link 540 is biased by the biasing force of the fourth biasing spring 580 in the direction of the arrow AR41 shown in the drawing, The abutment portion 544 of the sub link 540 abuts against the stopper portion 501 d of the right main support bracket 501, whereby the sub link 540 is disposed at the second position which is a steady position in the rotational direction.

  As described above, in the state in which the sub link 540 is arranged at the second position, the pivoting arm 541 of the sub link 540 is in a state of pressing the arm lever 233 a of the sublock arm 233 of the sublock portion 230B.

  Therefore, the sublock portion 230B is in the unlocked state (that is, the state shown in FIG. 10), and the inner side in the sheet width direction of the guide groove 101 in which the sublock claw 233b of the sublock arm 233 is provided in the right lower rail portion 100. It is in the state of being separated from the inner side located at

  As described above, when the slide lever 60 and the walk-in lever 70 are not operated, although the sub lock portion 230B is in the unlocked state, both the right main lock portion 230A and the left main lock portion 430A are in the locked state. The slide movement of the seat cushion 10 is limited, and the seat cushion 10 disposed at a substantially arbitrary position within the range of the slide movement area SR can be maintained fixed at the position.

  Next, with reference to FIGS. 17 and 18, the states of the link mechanism 500 and the lock mechanism at the time of operation of the slide lever 60 will be described. Here, the states shown in FIG. 17 and FIG. 18 show the case where the slide lever 60 is operated from the states shown in FIG. 15 and FIG.

  As shown in FIGS. 17 and 18, when the slide lever 60 is operated, the inner cable 562 of the main cable 560 is pulled, while the inner cable 572 of the sub cable 570 is not pulled. .

  Therefore, when the slide lever 60 is operated, the inner cable 562 of the main cable 560 is pulled in the direction of the arrow DR 401 shown in the drawing, whereby the right main link 520 and the left main link 530 are the first ones described above. From the state of being placed in the position, it rotates in the direction of arrow DR 402 (that is, the forward direction) shown in the figure against the biasing force of the third biasing spring 550.

  Along with the forward rotation of the right main link 520 and the left main link 530, the pivot arm 521 of the right main link 520 presses the arm lever 232a of the right main lock arm 232 of the right main lock portion 230A. Also, the pivot arm 531 of the left main link 530 also presses the arm lever 432 a of the left main lock arm 432 of the left main lock portion 430A.

  Therefore, both the right side main lock portion 230A and the left side main lock portion 430A are in the unlocked state (that is, the state shown in FIGS. 7 and 13), and the main lock claw 232b of the right side main lock arm 232 is the right lower rail portion 100. And the main lock claws 432b of the left main lock arm 432 move from the main lock holes 302 of the left lower rail portion 300 and the main lock holes 416 of the left upper rail portion 410. Get out of each one. As a result, the main lock claw 232 b of the right main lock arm 232 is separated from the inner side surface located inward in the seat width direction of the guide groove 101 provided in the right lower rail portion 100, and the left main lock arm 432. The main lock claw 432b is separated from the inner side surface of the guide groove 301 provided in the left lower rail portion 300, which is located inside in the seat width direction.

  Further, when the slide lever 60 is operated, as described above, since the inner cable 572 of the sub cable 570 is not pulled, the sub link 540 is maintained in the second position. become. Therefore, the sublock portion 230B is in the unlocked state, and the sublock claw 233b of the sublock arm 233 is positioned on the inner side surface of the guide groove 101 provided in the right lower rail portion 100 in the sheet width direction. It is maintained in a separated state.

  As described above, when the slide lever 60 is operated, the right side main lock portion 230A and the left side main lock portion 430A are both in the unlocked state, and the sublock portion 230B is also in the unlocked state. It is possible to adjust the position of the seat cushion 10 without restriction of movement. At that time, as described above, the main lock claw 232b of the right main lock arm 232, the main lock claw 432b of the left main lock arm 432, and the sub lock claw 233b of the sub lock arm 233 all have the right lower rail portion 100 and the left lower rail. Since it is in a separated state without coming into contact with the portion 300, not only the generation of abnormal noise can be prevented thereby, but it becomes possible to slide the seat cushion 10 with a smaller force. Therefore, the operability at the time of slide movement can be improved and the generation of abnormal noise can be suppressed.

  When the operation of the slide lever 60 is released, the right main link 520 and the left main link 530 of the third biasing spring 550 are released as the pulling of the inner cable 562 of the main cable 560 is released. By rotating in the opposite direction by the biasing force, they return to the first position. As a result, both the right side main lock portion 230A and the left side main lock portion 430A shift to the locked state, and the position of the seat cushion 10 is fixed again at the position where the operation of the slide lever 60 is released.

  Next, with reference to FIGS. 19 and 20, the state of the link mechanism 500 and the lock mechanism when the walk-in lever 70 is operated and when the walk-in lever 70 is completed will be described. Here, the states shown in FIG. 19 and FIG. 20 show the case where the walk-in lever 70 is operated from the states shown in FIG. 15 and FIG.

  As shown in FIGS. 19 and 20, when the walk-in lever 70 is operated, the inner cable 562 of the main cable 560 is not pulled in, but the back frame 21 tilts forward. , And the inner cable 572 of the sub cable 570 is pulled.

  Therefore, when the walk-in lever 70 is operated, the sub-link 540 is disposed at the first position described above by pulling the inner cable 572 of the sub-cable 570 in the direction of the arrow DR 501 shown in the figure. From the state, it rotates in the direction of arrow DR 502 ′ (that is, the forward direction) shown in the figure against the biasing force of the fourth biasing spring 580.

  Along with the forward rotation of the sub link 540, the pivoting arm 541 of the sub link 540 releases the pressing of the arm lever 233a of the sublock arm 233 of the sublock portion 230B.

  Therefore, the sublock portion 230B is in the lock standby state (that is, the state shown in FIG. 9), and the inner side in the seat width direction of the guide groove 101 in which the sublock claw 233b of the sublock arm 233 is provided in the right lower rail portion 100. It will be in contact with the inner surface located at

  In addition, when the walk-in lever 70 is operated, although the inner cable 562 of the main cable 560 is not pulled as described above, the right main link 520 and the left main link 530 From the state of being disposed at the first position described above in conjunction with the forward rotation, from the state of the first position described above to the direction of arrow DR 502 shown in the figure against the biasing force of the third biasing spring 550 (ie forward direction). Rotate. The interlocking operation is realized by the interlocking operation unit configured by the pressing unit 545 and the abutment unit 525 described above.

  More specifically, when the right side main link 520 is arranged at the first position and the sub link 540 is arranged at the second position, the pressing portion 545 provided on the sub link 540 is the right side main link It abuts on an abutment 525 provided at 520 (see FIG. 16). That is, when the sub link 540 rotates in the forward direction, the interlocking action portion moves in the forward direction of the pressing surface of the pressing portion 545, which is positioned on the front side in the rotational direction of the sub link 540, and the right main link 520 in the forward direction. The pressing surface of the abutment portion 525, which is positioned on the rear side in the rotational direction of the right main link 520 when rotating, is configured, and the pressing surface of the pressing portion 545 and the pressing surface of the abutment portion 525 When the sub link 540 is rotated in the forward direction, the right main link 520 is also rotated in the forward direction interlocking with the sub link 540 as a result of the facing surfaces facing each other in the rotational direction.

  As described above, when the walk-in lever 70 is operated, the right main link 520 interlocks with the sub link 540, whereby the right main link 520 and the left main link 530 rotate in the forward direction, and accordingly, the right The pivoting arm 521 of the main link 520 presses the arm lever 232a of the right side main lock arm 232 of the right side main lock portion 230A, and the pivoting arm 531 of the left side main link 530 is also the left side main of the left side main lock portion 430A. The arm lever 432 a of the lock arm 432 is pressed.

  Therefore, both the right side main lock portion 230A and the left side main lock portion 430A are in the unlocked state (that is, the state shown in FIGS. 7 and 13), and the main lock claw 232b of the right side main lock arm 232 is the right lower rail portion 100. And the main lock claws 432b of the left main lock arm 432 move from the main lock holes 302 of the left lower rail portion 300 and the main lock holes 416 of the left upper rail portion 410. Get out of each one. As a result, the main lock claw 232 b of the right main lock arm 232 is separated from the inner side surface located inward in the seat width direction of the guide groove 101 provided in the right lower rail portion 100, and the left main lock arm 432. The main lock claw 432b is separated from the inner side surface of the guide groove 301 provided in the left lower rail portion 300, which is located inside in the seat width direction.

  As described above, when the walk-in lever 70 is operated, both the right side main lock portion 230A and the left side main lock portion 430A are in the unlocked state, and the subblock portion 230B is also in the lock standby state. The slide movement is not restricted, and the slide movement of the seat cushion 10 becomes possible.

  Thereafter, as shown in FIG. 20, while the walk-in lever 70 is operated, the seat cushion 10 is moved forward from the slide movement area SR, and the sablock claw 233b of the sablock arm 233 of the sablock portion 230B is on the right side. By reaching the sub lock hole 103 of the lower rail portion 100 (that is, the seat cushion 10 reaches the above-described specific position SP), the sub lock portion 230B in the lock standby state shifts to the lock state. . More specifically, the state in which the sublock pawl 233b of the sublock arm 233 is inserted into the sublock hole 103 of the lower right rail portion 100 and the sublock hole 217 of the upper right rail portion 210 by the biasing force of the fourth biasing spring 580. It becomes.

  Thereafter, the operation of the walk-in lever 70 is released, but even after the release of the operation of the walk-in lever 70, the back frame 21 is maintained in a state where it is tilted forward, so the sub cable The pulling of the 570 inner cable 572 is not released. Therefore, even after the operation of the walk-in lever 70 is completed, both the right side main lock portion 230A and the left side main lock portion 430A are maintained in the unlocked state, and the subblock portion 230B is maintained in the locked state. .

  As described above, after the operation of the walk-in lever 70 is completed, although the right main lock 230A and the left main lock 430A are both in the unlocked state, the sub lock 230B is in the locked state. The slide movement is limited, and the seat cushion 10 disposed at the above-described specific position SP can be maintained fixed at the position.

  When the seat cushion 10 is returned to the original seating position, the slide lever 60 is operated from the state shown in FIG. 20 to unlock all the right main lock 230A, the left main lock 430A and the sub lock 230B. Then, the seat cushion 10 may be moved rearward.

  As described above, by using the vehicle seat 1 according to the present embodiment, the right side main link 520, the left side main link 530, and the sub link 540 can be individually rotated. When the slide lever 60 is operated, the force generated by operating the slide lever 60 is transmitted only to the right main lock 230A and the left main lock 430A via the right main link 520 and the left main link 530, It is not transmitted to the subblock unit 230B. Therefore, in the case where the seating position is adjusted by operating the slide lever 60, the sublock portion 230B is in the unlocked state.

  On the other hand, when the seat cushion 10 is arranged at the specific position SP by operating the walk-in lever 70 by using the vehicle seat 1 according to the present embodiment, the walk-in lever 70 is operated. Not only is the force generated by the rear link transmitted to the subblock 230B through the sub link 540, but also the right main lock portion 230A and the left side through the right main link 520 and the left main link 530 by the action of the interlocking portion described above. It is also transmitted to the main lock portion 430A. Therefore, when the walk-in lever 70 is operated, the sub lock portion 230B shifts to the lock standby state, and the right main lock portion 230A and the left main lock portion 430A shift to the unlocked state, respectively, in this case. It is also possible to slide the seat cushion 10 in the above.

  Therefore, with the vehicle seat 1 according to the present embodiment, a vehicle having improved operability and reduced generation of noise while being equipped with a slide function and a walk-in function. It can be used as a seat.

  Here, in the vehicle seat 1 according to the present embodiment, the right side main lock portion 230A is provided with a plurality of main lock holes 102 provided in the right lower rail portion 100 and a main lock provided in the right side main lock arm 232. The claw 232 b and a first biasing portion 234 a of a first and second biasing spring 234 biasing the right main lock arm 232 toward the right lower rail portion 100, and the left main lock portion 430 A A plurality of main lock holes 302 provided in the left lower rail portion 300, main lock claws 432b provided in the left main lock arm 432, and a left main lock arm 432 biased toward the left lower rail portion 300 side; A biasing spring 434 is configured. With such a configuration, the right side main lock portion 230A and the left side main lock portion 430A that can perform the locking operation and the unlocking operation according to the operation of the link mechanism 500 described above can be configured with a relatively simple configuration. It will be possible to

  Further, in the vehicle seat 1 according to the present embodiment, the sablock portion 230B is provided with the sablock hole 103 provided in the lower right rail portion 100, the sablock claw 233b provided in the sablock arm 233, and the sabot The block arm 233 is constituted by a second biasing portion 234 b of a first and second biasing spring 234 which biases the block arm 233 toward the right lower rail portion 100. With such a configuration, it is possible to configure the sub-block unit 230B capable of performing the locking operation and the unlocking operation according to the operation of the link mechanism 500 described above with a relatively simple configuration.

  Further, in the vehicle seat 1 according to the present embodiment, the interlocking action portion is the pressing surface of the pressing portion 545 provided on the sub link 540 and the pressed surface of the abutment portion 525 provided on the right main link 520. And is composed of. By configuring in this manner, it is possible to configure the interlocking action unit with a relatively simple configuration.

  In the vehicle seat 1 according to the present embodiment, the link mechanism 500 further includes the third biasing spring 550 for returning the right main link 520 and the left main link 530 to the first position, and the sub link 540. And a fourth biasing spring 580 for returning the second position to the second position. By configuring in this way, each of right main link 520, left main link 530, and sub link 540 is reversely rotated in a relatively simple configuration when the operation of the operation mechanism is released, and the steady position is achieved. It is possible to return to the first position and the second position, which are

  Further, in the vehicle seat 1 according to the present embodiment, the right side main link 520 and the left side main link 530 are configured to rotate together by being connected by the shaft 510. With this configuration, it is possible to lock the upper rail so as not to slide with respect to the lower rail in a simple configuration in both the right slide rail and the left slide rail provided on the left and right of the vehicle seat 1 Become.

  Further, in the vehicle seat 1 according to the present embodiment, the sub-cable 570 is connected to the right side main link 520, and the main cable 560 is connected to the left side main link 530, whereby the second operation portion (ie The first operation portion (i.e., the slide lever 60) is connected to the main link located farther from the connection position of the back frame 21) in the left-right direction (i.e., the Y-axis direction) of the seat cushion 10. With such a configuration, the main cable 560 as the main drive power transmission mechanism and the sub cable 570 as the sub drive power transmission mechanism can be distributed to the left and right positions of the vehicle seat 1 and installed. Since this becomes possible, the vehicle seat 1 can be configured more easily.

  In the embodiment described above, the main lock portion is described by exemplifying the case where the pair of main lock portions is provided at the position of the seat cushion in the left and right direction. It may be provided only. Further, in the embodiment described above, the case where the sublock portion is provided only at one of the positions in the left and right direction of the seat cushion has been described as an example. A pair may be provided.

  Further, the specific configurations of the operation mechanism, the lock mechanism, and the link mechanism shown in the above-described embodiment are merely examples, and they may be appropriately different without departing from the scope of the present invention. Is also possible.

  Further, the application of the present invention is not limited to a vehicle seat equipped with a slide function and a walk-in function, and adjustment of a seating position by slide movement and arrangement of a seat cushion at a specific position are possible. The present invention can be applied to any vehicle seat that is configured.

  Furthermore, the present invention is applicable not only to vehicle seats for automobiles but also to any vehicle seats such as ships, aircraft, and train seats.

  As described above, the above-described embodiment disclosed this time is illustrative in all points and not restrictive. The technical scope of the present invention is defined by the scope of the claims, and includes all the modifications within the meaning and scope equivalent to the description of the scope of the claims.

  Reference Signs List 1 vehicle seat, 10 seat cushion, 11 cushion frame, 12 seating surface, 20 seat back, 21 back frame, 22 back surface, 30 headrest, 40 base, 50 slide rails, 51 lower rails, 52 upper rails, 60 slide levers, 70 walk-in lever, 100 right lower rail portion, 101 guide groove, 102 main lock hole, 103 sub lock hole, 200 right leg, 210 right upper rail portion, 211 rail portion, 212 upright wall portion, 213 roller, 214 front opening, 215 rear Side opening, 216 main lock hole, 217 sub lock hole, 220 right base bracket, 230 right lock portion, 230A right main lock portion, 230B sub lock portion, 231 holder, 231a, 23 1b convex part, 232 right main lock arm, 232a arm lever, 232b main lock claw, 232c concave part, 232d tab, 233 sublock arm, 233a arm lever, 233b sublock claw, 233c concave part, 233d tab, 234 first and fourth 2 biasing spring 234a first biasing portion 234b second biasing portion 235 pin 236 cap 300 left lower rail portion 301 guide groove 302 main lock hole 400 left leg 400 left upper rail portion 411 rail Part, 412 standing wall part, 413 roller, 414 opening, 416 main lock hole, 420 left base bracket, 430 left lock part, 430A left main lock part, 431 holder, 431a convex part, 432 left main lock arm, 4 32a arm lever, 432b main lock claw, 432c concave portion, 432d tab, 434 first biasing spring, 435 pin, 436 cap, 500 link mechanism, 501 right main support bracket, 501a axial support hole, 501b holding portion, 501c latching Part, 501d stopper part, 502 left main support bracket, 502a axial support hole, 502b holding part, 502d stopper part, 503 right sub support bracket, 510 shaft, 511, 512 ring, 520 right main link, 521 rotation arm, 523 Locking portion, 525 butting portion, 530 left main link, 531 pivoting arm, 532 holding hole, 535 butting portion, 540 sub link, 541 pivoting arm, 542 retaining hole, 543 locking portion, 544 Abutment part, 545 pressing part, 550 third biasing spring, 560 main cable, 561 outer cable, 562 inner cable, 570 sub cable, 571 outer cable, 572 inner cable, 580 fourth biasing spring.

Claims (8)

Fixed rails fixed to the floor of the vehicle,
A seat cushion on which a passenger can sit;
A movable rail that supports a cushion frame that forms a framework of the seat cushion and that is slidably attached to the fixed rail;
A lock mechanism for non-slidably locking the movable rail relative to the fixed rail;
An operation mechanism for operating the lock mechanism;
And a link mechanism for operating the lock mechanism by being interposed between the operation mechanism and the lock mechanism.
A main lock portion for non-slidably locking the movable rail against the fixed rail at substantially any position within at least a partial region in the sliding direction of the movable rail; And a sub-block portion for non-slidably locking the movable rail relative to the fixed rail at a specific position in the sliding direction of the movable rail.
The link mechanism has coaxially disposed individually rotatable main links and sublinks,
The main link rotates in the forward direction from the first position, which is the steady position of the main link, to unlock the main lock portion, and rotates in the reverse direction to return to the first position. Are configured to perform the locking operation of the main lock portion,
The sublink performs a locking operation of the sublock portion by rotating in the forward direction from the second position, which is a steady position of the sublink, and rotates in the reverse direction to return to the second position. To unlock the sublock portion, and
The operation mechanism includes a first operation unit connected to the main link, and a second operation unit connected to the sub link;
When the sub link is rotated in the forward direction from the second position by the second operation unit being operated, the link mechanism causes the main link to follow the sub link and the forward direction from the first position The vehicle seat which further has an interlocking action part rotated. The main lock portion has a plurality of main lock holes provided in the fixed rail, and main lock claws engageable with the plurality of main lock holes, and is rotatably assembled to the movable rail A main lock arm; and a first biasing spring for biasing the main lock arm toward the fixed rail in order to engage the main lock claw in any of the plurality of main lock holes;
When the main link is rotated in the forward direction, the main lock arm is pressed by the main link so that the main lock arm pivots in the unlocking direction against the biasing force of the first biasing spring. At the same time, when the main link is rotated in the reverse direction, the pressing of the main link against the main lock arm is released, whereby the main lock arm is rotated in the locking direction by the biasing force of the first biasing spring. Configured to
The sublock portion includes a sublock hole provided in the fixed rail, and a sublock arm having a sublock claw engageable with the sublock hole and rotatably assembled to the movable rail And a second biasing spring for biasing the sublock arm toward the fixed rail in order to engage the sublock pawl in the sublock hole,
When the sub link is rotated in the forward direction, the pressing of the sub link against the sub lock arm is released, and the sub lock arm is pivoted in the locking direction by the biasing force of the second biasing spring. When the sublink is rotated in the reverse direction, the sublock arm is pressed by the sublink so that the sublock arm rotates in the unlocking direction against the biasing force of the second biasing spring. The vehicle seat of claim 1, wherein the vehicle seat is configured to move. The interlocking action unit is configured of a pressing surface provided to the sub link and a pressed surface provided to the main link,
The pressing surface faces the front side in the rotation direction of the sub link when the pressing surface rotates in the forward direction so that the pressing surface and the pressed surface face each other in the rotation direction of the main link and the sub link. The vehicle seat according to claim 1, wherein the pressed surface faces the rear side in the rotation direction of the main link when the pressed surface rotates in the forward direction.   The link mechanism further includes a third biasing spring for returning the main link to the first position, and a fourth biasing spring for returning the sublink to the second position. The vehicle seat according to any one of claims 1 to 3. The fixed rail and the movable rail have a right fixed rail portion and a left fixed rail portion, and a right movable rail portion and a left movable rail portion which are disposed at left and right positions of the seat cushion,
The main lock portion slides the right side movable rail portion with respect to the left side fixed rail portion, and the right side main lock portion for locking the right side movable rail portion in a non-slidable manner with respect to the right side fixed rail portion. The vehicle seat according to any one of claims 1 to 4, further comprising: a left main lock portion for locking the lock. The main link has a right side main link corresponding to the right side main lock portion and a left side main link corresponding to the left side main lock portion;
The vehicle seat according to claim 5, wherein the right side main link and the left side main link are configured to rotate together by being connected by a shaft extending in the left and right direction of the seat cushion.   The first operation unit is connected to the main link at a position farther from the connection position of the second operation unit to the sub link in the left-right direction of the seat cushion among the right side main link and the left side main link The vehicle seat according to claim 6. Further equipped with a seatback that allows the passenger to backrest,
The first operation unit has a lever provided on the front or side of the seat cushion,
The second operation unit includes a lever provided at an upper portion, a side portion, or a rear portion of the seat back,
The specific position at which the movable rail is locked by the sublock portion is disposed forward of the partial region where the movable rail can be locked by the main lock portion in the sliding direction of the movable rail A vehicle seat according to any of the preceding claims, wherein

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