JP4970800B2 - Vehicle seat device - Google Patents

Description

    The present invention relates to a vehicle seat device.

Regarding a vehicle seat such as an automobile, there is a proposal that both folding a seat back into a seat cushion and returning to a standing state are performed by an electric motor (see Patent Document 1). In this proposal, the electric motor is stopped by detecting the completion of folding the seat back and the completion of the unfolding (standing up) with the limit switches. In addition, the entire seat can be stored in the storage portion at the back of the seat while the seat back is folded on the seat cushion, and the storage and return operation is performed by an electric motor. There is also known a proposal of disposing the rear side of the seat (loading room) (see Patent Document 2).
JP-A-2005-41406 Japanese Patent Laid-Open No. 2004-249962

    By the way, when the seat back is erected from the forward position, if the electric motor is employed as described above, the burden on the user is reduced. However, if the electric motor is moved forward from the standing state of the seat back, it takes a relatively long time for the electric motor to start, the seat back to move forward, and the electric motor to stop. Consumption will also increase. Therefore, the seat back is stood up by an electric motor, and a spring or other urging means is used for the forward movement, so that the seat back is immediately brought forward if the seat back is unlocked manually. Can be considered.

    However, since the electric motor for standing up is engaged with the seat back or the vehicle body (or the seat cushion) via transmission means such as a gear, the electric motor becomes a resistance when the seat back is moved forward. There is a problem. That is, in order to move the seat back forward, it is necessary to rotate the output shaft of the electric motor in the direction opposite to that at the time of standing, so that the electric motor becomes a resistance. Therefore, there is a concern that the seat back stops in the middle of the forward movement by the urging means, and the predetermined forward movement state is not achieved unless the user pushes the seat back from above. Further, in a case where the base end portion of the seat back is rubbed against the rear end portion of the seat cushion when the seat back is tilted forward, the seat back may be further brought into a predetermined forward state by frictional resistance at the time of rubbing. It becomes difficult.

    In response to such a problem, the present inventor has provided a clutch in the power transmission system of the transmission motor so that when the seat back is unlocked, the power transmission system is cut off at the same time so that the seat back is moved forward. The electric motor was made not to become resistance. That is, the lock release control cable is connected to the seat back lock portion, while the clutch release control cable is connected to the clutch so that both control cables can be pulled simultaneously by one operation lever or the like, and the lock is released. The clutch was released at the same time.

    However, when the operation confirmation experiment of the simultaneous release of the lock and the clutch was continued, there was a case where the clutch was not released. This is because the play due to the extension of the clutch release cable is larger than the play due to the extension of the lock release cable, and the operation force by the operation lever or the like is not reliably transmitted to the clutch.

    Therefore, the present invention relates to the difference in the extension amounts of the two control cables in a vehicle seat having a mechanism portion that should be operated at the same time or prior to releasing the lock when the seat back is unlocked. Therefore, it is an object of the present invention to make it possible to reliably operate the mechanism portion when unlocking.

    In order to solve such a problem, the present invention can absorb the play caused by the extension of the control cable.

The invention according to claim 1 can shift to a seat cushion and a predetermined standing state by turning around the vicinity of the rear end portion of the seat cushion and a forwardly tilted state where the seat cushion is tilted or folded and folded. A seat back, urging means for urging the seat back to rotate in the forward-turning direction, a holding mechanism portion for holding the seat back in the upright state, and a holding mechanism portion. In the vehicle seat device provided with an interlocking mechanism portion to be operated when the holding is released,
A first control cable connected to the holding mechanism and for releasing the holding of the seat back by the holding mechanism;
A second control cable connected to the interlocking mechanism and operating the interlocking mechanism;
A movable operation unit for pulling the inner cable of both the first and second control cables;
A transmission member that distributes and transmits the operation force of the movable operation unit to both the control cables,
The transmission member is variable with respect to the movable operation unit so as to absorb relative play between the two control cables with respect to the pulling operation when the movable operation unit is displaced in the pulling direction. is provided to,
Furthermore, the first urging means for urging the first control cable in the anti-traction direction, and the second urging means for urging the second control cable in the anti-traction direction,
The biasing force of the second biasing means is smaller than the biasing force of the first biasing means .

Therefore, even if there is a difference in the inner cable play amount between the two control cables, when the movable operation unit is pulled, the transmission member works to absorb the relative play between the two control cables. As a result, the operation force of the movable operation unit reaches both control cables simultaneously. Therefore, for example, it is possible to avoid a situation in which only the upright holding of the seat back by the holding mechanism part is released and the interlocking mechanism part does not operate. That is, both the holding mechanism part and the interlocking mechanism part can be reliably operated. In addition, the urging force of the second urging means for urging the second control cable in the counter traction direction is smaller than the urging force of the first urging means for urging the first control cable in the counter traction direction. This is advantageous in operating the interlocking mechanism portion before the seat back holding mechanism portion.

The invention according to claim 2 is the invention according to claim 1,
The transmission member is a pulley supported by the movable operation unit,
The both control cables are characterized in that the end portions on the movable operation portion side of each inner cable are connected to each other, and the connected portions are wound around the pulley.

    Therefore, when the pulley supported by the movable operation unit moves in the cable pulling direction in accordance with the operation of the movable operation unit, if there is relative play between the two control cables, the pulley receives from both control cables. A difference is produced in the rotational resistance. As a result, the pulley rotates so that the rotational resistance received from both control cables becomes equal, and thereafter, the operating force of the movable operating portion is transmitted to both control cables. Therefore, for example, both the mechanism parts can be reliably operated without causing a situation in which only the upright holding of the seat back by the holding mechanism part is released and the interlocking mechanism part does not operate.

The invention according to claim 3 is the invention according to claim 1,
The transmission member is an oscillating rod whose intermediate part is pivotally supported by the movable operation part,
Each of the control cables is connected to each inner cable on both sides of the intermediate pivot point of the swing rod,
The direction connecting the connection points of the two control cables connected to the swing rod intersects with the moving direction of the intermediate pivot point by the operation of the movable operation unit.

    Accordingly, when the swing rod supported by the movable operation portion moves in the cable pulling direction in accordance with the operation of the movable operation portion, if there is relative play between the two control cables, the swing rod is A difference occurs in the resistance received from the control cable. As a result, the oscillating rod oscillates so that the resistances received from both control cables are equal, and thereafter, the operating force of the movable operating portion is transmitted to both control cables. Therefore, for example, both the mechanism parts can be reliably operated without causing a situation in which only the upright holding of the seat back by the holding mechanism part is released and the interlocking mechanism part does not operate.

In the invention according to claim 4, the seat cushion and the seat cushion are rotated about the vicinity of the rear end portion of the seat cushion, respectively, and shifted to a predetermined standing state and a forwardly tilted state that is tilted or folded toward the seat cushion side. Possible seat back, urging means for urging the seat back to rotate in the forward-turned state, a holding mechanism portion for holding the seat back in the upright state, and the holding mechanism portion In the vehicle seat device provided with an interlocking mechanism portion to be operated when the holding is released,
A first control cable connected to the holding mechanism and for releasing the holding of the seat back by the holding mechanism;
A second control cable connected to the interlocking mechanism and operating the interlocking mechanism;
A movable operation unit for pulling the inner cable of both the first and second control cables,
The movable operation unit includes a lever to which the both control cables are connected,
In the first control cable and the second control cable, the former is connected to a position closer to the swing fulcrum of the lever than the latter ,
Furthermore, the first urging means for urging the first control cable in the anti-traction direction, and the second urging means for urging the second control cable in the anti-traction direction,
The biasing force of the second biasing means is smaller than the biasing force of the first biasing means .

Accordingly, when the lever is rotated by the pulling operation of the movable operation portion , the second control cable far from the swing fulcrum has a larger pulling amount than the first control cable. For this reason, even if the play amount of the second control cable is slightly larger than the play amount of the first control cable due to secular change, it is possible to reliably pull the second control cable and operate the interlocking mechanism portion. it can.

    That is, since the operation of the movable operation unit performed by the operator is basically performed to tilt the seat back forward, the operator operates the movable operation unit until the seat back is tilted forward. When the movable operation unit is operated, the second control cable is pulled to a greater extent than the first control cable for tilting the seat back forward, so the holding mechanism is released and the seat back is moved forward. When the movable operation unit is operated until it falls, unless the play amount of the second control cable is excessive, the second control cable is pulled to operate the interlocking mechanism unit.

  In addition, the urging force of the second urging means for urging the second control cable in the counter traction direction is smaller than the urging force of the first urging means for urging the first control cable in the counter traction direction. This is advantageous in operating the interlocking mechanism portion before the seat back holding mechanism portion.

The invention according to claim 5 is any one of claims 1 to 4 ,
The movable operation unit is provided on a front surface of the seat back, and includes a pulling unit that pulls the inner cables of the control cables by being pulled forward of the seat back.

That is, even if the play of the second control cable is larger than that of the first control cable, the interlocking mechanism portion can be originally operated if the movable operation portion is sufficiently operated to increase the pulling amount. However, in the method in which the above-described pulling unit is provided in the movable operation unit and the seat back is tilted forward by pulling this to the front of the seat back, when the seat back starts to tilt forward, the forward direction of the seat back is thereafter set. Since both the traction directions of the traction section are forward directions, it becomes difficult to further pull the traction section. Therefore, when the seat back starts to fall forward, the operator usually stops the towing operation of the towing unit at that time. Therefore, the interlocking mechanism part is likely to remain unoperated. However, even in such a case, according to the inventions of claims 1 to 4 , the interlocking mechanism can be reliably operated. Therefore, the inventions of claims 1 to 4 are more effective in the case where the traction portion as described above is provided.

The invention according to claim 6 is any one of claims 1 to 5 ,
The seat cushion is provided on one member of the seat cushion or the vehicle body and the seat back, and by transmitting torque to the other member, the seat back is rotated around the rear end portion of the seat cushion to stand up. Equipped with an electric motor
As the interlocking mechanism portion, when a holding release operation of the holding mechanism portion is performed to bring the seat back into the forward-turned state, a force is generated between the electric motor of the one member and the other member. It is characterized in that a transmission canceling means that operates so as not to be transmitted is provided.

    Therefore, the transition from the forward-facing state of the seat back to the standing-up state can be performed by the electric motor provided on one member of the seat cushion or the vehicle body and the seat back, and the burden on the user can be reduced. On the other hand, when the movable operation unit is operated in the cable pulling direction in a state where the seat back is held in the standing state by the holding mechanism, the operation force is transmitted to the holding mechanism unit by the first control cable, and the seat back is held by the holding mechanism unit. The standing standing by is released and falls forward.

    At this time, according to the present invention, since the operation force is reliably transmitted to the transmission release means (interlocking mechanism portion) by the second control cable, between the electric motor of the one member and the other member. It is avoided that the force is not transmitted and the electric motor becomes a resistance when the seat back is pushed forward. That is, it is not necessary to rotate the output shaft of the electric motor unit in the direction opposite to that when the seat back is raised when the seat back is tilted forward. Therefore, the seat back can be brought into a desired forward-turned state only by the urging force of the urging means or simply by the user applying a light force to the urging force.

As described above, according to the present invention, the movable operation unit is configured such that the transmission member that distributes and transmits the operation force of the movable operation unit to both control cables absorbs the relative play between the two control cables. Or the first control cable is connected to a position near the swing fulcrum of the lever of the movable operation unit, and the second control cable is connected to a position far from the swing fulcrum. When the movable operation unit is operated such that the seat back is tilted forward, it is advantageous for reliably operating the interlocking mechanism unit at the same time as or before the release of the standing-back holding of the seat back. In addition, the urging force of the second urging means for urging the second control cable in the counter traction direction is smaller than the urging force of the first urging means for urging the first control cable in the counter traction direction. This is advantageous in operating the interlocking mechanism portion before the seat back holding mechanism portion.

    Hereinafter, embodiments of the present invention will be described with reference to the drawings.

    FIG. 1 shows the rear part of a vehicle (automobile) having three rows of seats arranged in the front-rear direction. That is, the intermediate seat 1 and the rear seat 2 are shown in the figure, and the illustration of the front seat having the driver's seat is omitted. In a state where the seat back 4 of the rear seat 2 is raised, the back portion of the seat back 4 is a luggage compartment 5. That is, the vehicle compartment is partitioned into a front passenger compartment and a rear cargo compartment 5 by the standing seat back 4. The loading operation can be performed from the rear of the vehicle by opening the back door 6 on the back of the vehicle. Further, a side door is provided on the side of the intermediate seat 1 (outside in the vehicle width direction), and it is possible to get on and off the intermediate seat 1 and the rear seat 2 by opening the side door.

    The intermediate seat 1 is configured such that a seat back 12 can be reclined at a rear end of a seat cushion 11 fixed to a floor.

    The rear seat 2 also includes a seat cushion 3 and a seat back 4, but the configuration is different from that of the intermediate seat 1.

    That is, the front portion of the seat cushion 3 is supported on the floor by the link 13 so as to be movable up and down. On the other hand, the lower end of the seat back 4 is rotatably supported by a pivot pin 15 on a bracket 14 fixed to the floor. Further, the rear end of the seat cushion 3 and the lower end of the seat back 4 are connected by a pivot pin 16. The pivot pins 15 and 16 and the pivot pins at both ends of the link 13 are horizontally provided in the vehicle width direction.

    Thus, when the seat back 4 is tilted forward, as shown in FIG. 2, the seat cushion 3 is pushed forward by the seat back 4, the link 13 is tilted forward, and the seat cushion 3 is lowered, Then, the seat back 4 is folded forward. When the seat back 4 is raised, the seat cushion 3 is pulled to the seat back 4, and the link 13 rises to reach a high position (see FIG. 1).

    Then, the seat back 4 of the rear seat 2 is moved forward as described later from a predetermined standing state (for example, a state inclined at 15 to 25 degrees rearward from the vertical line) held by a holding mechanism portion described later. It can be tilted forward by the urging means, and can be raised from the forward tilted state to the predetermined standing state by an electric motor section described later, and further can be reclined appropriately rearward.

    Further, an operation string (traction unit) 7 </ b> A constituting a movable operation unit for operating release of the holding by the holding mechanism unit and the like is provided at the lower front portion of the seat back 4. An operation string (traction unit) 7 </ b> B constituting a movable operation unit for operating release of the holding by the holding mechanism unit and the like is also provided on the upper rear surface of the seat back 4. The operation string 7A is pulled forward, and the operation string 7B is pulled backward. Both the operation strings 7A and 7B are passed through the seat back 4, and their base ends are connected to an operation lever (to be described later) constituting the movable operation unit. Further, an automatic return type operation switch 8 urged to the normally-off side for turning on the electric motor unit is provided on the side wall of the luggage compartment 5.

    A tire accommodating recess 17 that is recessed downward is formed in the floor of the cargo compartment 5 so that a spare tire 18 can be accommodated in the recess 17. The front portion of the housing recess 17 is covered by the rear portion of the rear seat 2, and the rear portion of the housing recess 17 is covered by the sub trunk 19. For example, small items can be accommodated in the sub trunk 19. When the seat back 4 of the rear seat 2 is tilted and folded on the seat cushion 3, the upper surface of the sub-trunk 19 and the rear surface of the seat back 4 are substantially flush with each other as shown in FIG. . In this case, the luggage can be placed on the back surface of the seat back 4 that has fallen, and the luggage compartment 5 is expanded to the passenger compartment side. That is, the passenger compartment is in a state of being divided into a front passenger compartment and a rear cargo compartment 5 by the seat back 12 of the intermediate seat 1.

<Structure of rear sheet>
FIG. 3 shows the frame structure of the rear seat 2 and the mounting structure to the vehicle body floor. Since the vehicle includes two left and right independent rear seats 2, each having a function according to the present invention described later, the right seat as viewed from the front will be mainly described in detail below. In the figure, reference numeral 21 denotes a frame of the seat cushion 3, which is provided with a spring 22 and the like. A front portion of the cushion frame 21 and a front / rear frame 23 that extends in the front / rear direction and is fixed to the floor are connected by a link 13. A cushion body (not shown) is attached to the cushion frame 21.

    In FIG. 3, reference numeral 25 denotes a frame of the seat back 4, which is supported by a vehicle width frame 26 that extends in the vehicle width direction and is fixed to the floor so as to be rotatable in the front-rear direction. That is, the bracket 14 (not shown in FIG. 3) is fixed to the vehicle width frame 26, and the lower end of the seat back frame 25 is connected to the bracket 14 by the pivot pin 15 (not shown in FIG. 3). A portion where the rear end of the seat cushion frame 21 rises and a portion of the seat back frame 25 located above the pivot pin 15 are connected by a pivot pin 16.

    Although not specifically shown, a winding spring is provided at the pivotal support portion of the seat back 4 of each of the left and right rear seats 2 as a forward tilting biasing means for biasing the seat back 4 forward. Is provided. Then, the knuckle as a holding mechanism for holding the seat back 4 in a predetermined standing state and a tilted or tilted rearward state after the seat back 4 is tilted backward or tilted to the pivotal support portion on the vehicle body center side among the pivotal support portions on both sides of the seatback 4. 31 is provided. In FIG. 3, the right seat side is drawn with the knuckle covered with the cover 32, and the knuckle itself is not shown. On the other hand, an electric motor with a speed reducer for raising the seat back 4 from a forwardly tilted or tilted forward position to a predetermined standing state in the vicinity of the pivotal support on the side wall of the vehicle body among the pivots on both sides of the seat back 4 ( A DC motor or a synchronous motor (33) which is a type in which a field is generated by a permanent magnet and DC is input is provided.

    On the back surface of the frame 25 of the seat back 4, when the seat back 4 is folded forward so as to be folded over the seat cushion 3, a flat luggage placing plate 35 for forming a flat luggage placing surface is fixed. Yes.

<Electric motor drive circuit>
As shown in FIG. 4, the left and right rear seat electric motors 33 have built-in varistors and circuit breakers, and each drive circuit 41 has the above-described automatic return type operation switch 8 and knuckle as a forced shut-off means. An interlocking switch 42 and a fuse 43 are provided. The interlocking switch 42 is turned off when the knuckle 31 is holding the seat back 4 (the drive circuit 41 is opened), and is turned on by a knuckle lever described later in other states. That is, when the operation switch 8 is turned on, the electric motor 33 is energized (a state where energization of the electric motor 33 is allowed).

<Knuckle and interlocking switch>
As shown in FIG. 5, the cover 45 of the knuckle 31 is provided with a knuckle lever 46 as a mechanism member provided concentrically with the rotation center of the seat back 4, and the interlock switch 42. The knuckle lever 46 is connected to a first control cable 47 that is pulled by the operation string 7A or 7B. The interlock switch 42 is disposed in the vicinity of the knuckle lever 46 so that the movement of the knuckle lever 46 is directly received and the on / off switching is performed.

    Specifically, the relationship between the knuckle 31 and the interlocking switch 42 is shown in FIGS. 6 and 7. 6 and 7 schematically show the knuckle lever 46. The knuckle 31 has an internal gear (first engagement member) 51 fixed to the seat back 4 concentrically with the center of rotation thereof, and a pair of lock members (second engagement) disposed inside the internal gear 51. Member) 52 and a cam member 53 for driving the lock member 52. A knuckle lever 46 is coupled to the cam member 53, and the knuckle lever 46 and the cam member 53 constitute a mechanism member of an engagement / release mechanism.

    The internal gear 51 includes a pair of internal teeth 54 that are formed on the inner peripheral surface of the ring member so as to face each other across the axis (same as the center of rotation of the seat back 4). A space between both internal teeth 54 of the internal gear 51 is formed on a raised surface 55 that is higher than the tooth tip surface of the internal tooth 54 (raised so that the inner diameter becomes smaller).

    The pair of lock members 52 are provided at positions facing each other with the shaft center interposed therebetween, and lock teeth 56 that engage with (engage with) the inner teeth 54 are formed on the surfaces facing outward. Both lock members 52 are arranged on the vehicle body side (or on the seat cushion side, hereinafter referred to as the “vehicle body side”, which may be the seat cushion side) so as to be movable in the radial direction of the internal gear 51. It is supported and biased by biasing means (not shown) so as to move in the direction in which the engagement with the internal teeth 54 is released, that is, toward the axial center. When the lock member 52 is engaged with the internal teeth 54 of the internal gear 51, the seat back 4 is in a locked state in which the seat back 4 is held in a predetermined standing state or a backward state with respect to the vehicle body side. That is, the seat back 4 is held in a standing or backward state against the urging force of the forward urging means (winding spring). When the engagement of the lock member 52 is released, the seat back 4 becomes rotatable with respect to the vehicle body side. As a result, the seat back 4 is tilted forward by the bias of the forward tilt biasing means.

    The cam member 53 is disposed between the pair of lock members 52 and is provided so as to be rotatable around the axis. On the peripheral surface of the cam member 53, a pair of engaging surfaces 57 facing each other with the shaft center interposed therebetween and a pair of release surfaces 58 facing each other sandwiching the shaft center are formed adjacent to each other in the circumferential direction. Has been. As shown in FIG. 6, when the cam member 53 rotates and the pair of engaging surfaces 57 contact the surfaces facing the inner side (axial side) of the lock members 52 (first form), the both locks The member 52 moves outward against the above-mentioned bias and enters the seat back lock state in which it engages with the internal teeth 54. On the other hand, the pair of release surfaces 58 is shorter than the engagement surface 57 from the axis. Therefore, when the cam member 53 rotates and the both release surfaces 58 come into contact with the surfaces facing the inner side (axial side) of the lock members 52 (second form) as shown in FIG. The member 52 is moved inward by the urging force to be in a seat back release state in which the engagement with the internal teeth 54 is released.

    The knuckle lever 46 and the cam member 53 are in a first form (see FIG. 6) in which the engagement surface 57 is in contact with the lock member 52 and the lock member 52 is engaged with the inner teeth 54 to hold the seat back 4 on the vehicle body side. Thus, the rotation direction is urged by the first urging means 59. Therefore, when the knuckle lever 46 is pulled by the operating string 7A or 7B via the first control cable 47, the cam member 53 rotates and the release surface 58 faces the inside of the lock member 52 as shown in FIG. The second form (seat back released state) is brought into contact with the contacted surface.

    In the present embodiment, the operation string 7, the relay member 34, the first control cable 47, the knuckle lever 46, the cam member 53, and the first urging means 59 constitute an engagement / release means.

    Then, as shown in FIG. 6, the interlock switch 42 is arranged so that when the knuckle lever 46 is in the first form (seat back locked state), the knuckle lever 46 comes into contact and is turned off. ing. As shown in FIG. 7, when the knuckle lever 46 moves to the seat back release position and moves away from the interlock switch 42 (becomes the second form), the interlock switch 42 is turned on.

    In FIG. 8, the state in which the seat back 4 stands is represented by a solid line, and the state in which the seatback 4 is tilted forward is represented by a two-dot chain line. In the predetermined standing state described above, the interlock switch 42 is turned off by the contact of the knuckle lever 46. When the knuckle lever 46 is pulled by the operation string 7A or 7B, the lock member 52 is released from the seat back, the knuckle lever 46 is separated from the interlock switch 42, and the interlock switch 42 is turned on.

    In this state, as shown by a two-dot chain line in FIG. 8, when the seat back 4 is tilted forward by the bias of the forward biasing means (winding spring), the internal gear 51 is simultaneously moved to the seat as shown in FIG. Since it rotates in the direction of the arrow A together with the back 4, the lock member 52 rides on the raised surface 55 of the internal gear 51. This state is a state in which the lock member 52 prevents the cam member 53 from returning to the seat back lock state against the bias of the first biasing means 59. Therefore, even if the pulling by the operation string 7A or 7B is released, the interlock switch 42 is kept in the on state.

    In this embodiment, when the seat back 4 is in a predetermined standing state, the lock teeth 56 of the lock member 52 are engaged with the internal teeth 54 of the internal gear 51 in a position adjacent to the raised surface 55. The positional relationship between the internal gear 51 and the lock member 52 is set. Furthermore, even when the seat back 4 is folded forward and folded into the seat cushion 3 in the seat back released state, the lock teeth 56 of the lock member 52 face the raised surface 55 and the inner teeth 54 The range of the raised surface 55 is set so as not to be engaged with each other. Therefore, as shown by a two-dot chain line in FIG. 8, the interlock switch 42 remains on (a state in which energization to the electric motor 33 is allowed) even when the seat back 4 is in the fully forwarded state.

    Therefore, when the operation switch 8 is turned on, the electric motor 33 is activated and the seat back 4 is raised. When the seat back 4 is in a predetermined standing state, the lock teeth 56 of the lock member 52 are engaged with the internal teeth 54 of the internal gear 51, and at the same time the seat back 4 is held in the predetermined standing state. 42 is turned off and the electric motor 33 stops energizing and stops, that is, no torque is generated.

    In addition, as shown by a one-dot chain line in FIG. 9, when the seat back 4 is in a predetermined standing state, when the operation string 7A or 7B is pulled and the seat back is released, the seat back 4 is moved to the above-mentioned front side. By pushing backward against the urging force of the urging urging means, it can be moved backward as shown by the solid line. When the pulling of the operation cords 7A and 7B is released, the cam member 53 is rotated by the urging force of the first urging means 59, and the lock member 52 is engaged with the inner teeth 54 of the internal gear 51, whereby the seat back 4 Is held in a state where it is tilted backward by an appropriate angle. The internal teeth 54 of the internal gear 51 are provided in a predetermined range in the circumferential direction of the internal gear so that the seat back 4 can be held at an appropriate angle from the predetermined standing state to the state where the seat back 4 is tilted so as to be substantially horizontal rearward. It has been. Further, the state in which the seat back 4 is tilted backward by an appropriate angle and held by the lock member 52 is a state in which the knuckle lever 46 is rotated by the urging force of the first urging means 59 and is in contact with the interlock switch 42 (FIG. 9). Solid line state). Accordingly, since the interlock switch 42 is in the off state, the electric motor 33 is not started even when the operation switch 8 is turned on.

<Electric motor seat back standing mechanism>
As shown in FIG. 10, a motor support member 61 is fixed to the seat back frame 25 of the rear seat 2, and the electric motor 33 is supported on the motor support member 61. The support member 61 supports a drive gear 62 that is rotated by the output shaft of the electric motor 33 with the shaft center in the vehicle width direction. As shown in FIG. 11, the drive gear 62 is rotationally driven via a worm 63 coupled to the output shaft of the electric motor 33. The electric motor 33 and the worm 63 are collectively referred to as an electric motor unit, but the present invention includes a case where the drive gear 62 is driven only by the electric motor 33 without passing through the worm. On the other hand, on the support bracket 64 fixed to the vehicle body floor, the driven gear 65 is rotatably supported concentrically with the center of rotation of the seat back 4 of the rear seat 2. The drive gear 62 is engaged with the driven gear 65.

    The driven gear 65 is integrally provided with an engaging gear 66 that rotates together with the driven gear 65. On the other hand, a hook member 67 that can engage with the engagement gear 66 is rotatably supported by the support bracket 64 by a support shaft 68 in the vehicle width direction. However, the hook member 67 is urged by an urging means (spring) 69 so as to rotate in a direction to engage with the engagement gear 66. Further, a release lever 71 is rotatably supported on the motor support member 61 by a support shaft 72 in the vehicle width direction. The release lever 71 releases the engagement of the hook member 67 with the engagement gear 66 against the urging force of the urging means 69. In this case, the engagement gear 66 and the hook member 67 constitute a clutch that prevents the driven gear 65 from rotating together with the seat back 4.

    The engagement gear 66 is formed with a plurality of engagement teeth 74 with a predetermined pitch in the circumferential direction with which the tip hook 73 of the hook member 67 engages. The tooth surface (engagement surface) of the engagement tooth 74 is parallel to the axis of the driven gear 65, faces forward in the rotational direction when the seat back is tilted forward, and extends in the substantially radial direction of the driven gear 65. Further, the pitch of the engagement teeth 74 is set to 120 degrees that is slightly larger than the forward tilt angle (100 to 115 degrees) at which the seat back 4 rotates from the predetermined standing state to the fully forward state. is doing. Therefore, in this example, three engagement teeth 74 are provided. Note that the number of the engaging teeth 74 may be one or two.

    Therefore, when the hook 73 of the hook member 67 is engaged with the engagement teeth 74 of the engagement gear 66, the driven gear 65 cannot rotate in the seat back forward direction. Therefore, when the seat back 4 is in the forward-turned state, when the electric motor 33 is started with the hook member 67 in the engaged state and the drive gear 62 is rotated in the seat back standing direction, the hook member 67 prevents the rotation. The driven reaction gear 65 receives the rotational reaction force of the drive gear 62. As a result, the driving gear 62 rotates around the driven gear 65 and moves in the seat back rotation direction, that is, the meshing position of the driving gear 62 and the driven gear 65 changes, thereby changing the seat back. 4 gets up. That is, when the torque of the electric motor 33 is transmitted to the vehicle body side via the drive gear 62 and the driven gear 65, the seat back is raised.

    In the present embodiment, the electric motor 33 is set so that the time required for shifting the seat back 4 from the fully forwarded state to the predetermined standing state is 7 seconds or less (preferably 3 to 4 seconds). Is set. Further, the forward biasing means causes the time required for shifting the seat back 4 from the predetermined standing state to the fully forward state to shift the seat back 4 from the completely forward state to the predetermined standing state. It is set to be shorter than the time required. Thereby, while ensuring safety, the transition time between the fully forwarded state and the standing state is shortened to improve convenience.

<Transmission release means>
The hook member 67 is provided with a pin 76 as a receiving portion that receives the release force from the release lever 71. On the other hand, the release lever 71 is provided with a pin abutting portion 77 that comes into contact with the pin 76 of the hook member 67 from the side where the engagement gear 66 exists. The release lever 71 is urged by the second urging means (spring) 78 so that the pin abutting portion 77 rotates in a direction away from the pin 76 (on the engagement gear 66 side). The release lever 71 is coupled to the second control cable 79 that is pulled by the operation string 7A or 7B described above. That is, the operating force of the operating cord 7A or 7B is transmitted to the release lever 71 via the second control cable 79, and the release lever 71 rotates the hook member 67 against the bias of the second biasing means 78. That is, it is rotated in the direction in which the engagement with the engagement gear 66 is released.

    In this case, the release lever 71 and the second urging means 78 constitute a transmission release means for releasing the rotation prevention of the driven gear 65 by the clutch so that the electric motor 33 does not become a resistance when the seat back is moved forward. .

    When the release lever 71 rotates the hook member 67 away from the engagement gear 66, when the seat back 4 starts to move forward from a predetermined standing state, the release lever 71 moves with the rotation of the seat back 4. And move away from the hook member 67. Accordingly, the pin abutting portion 77 of the release lever 71 is disengaged from the pin 76 of the hook member 67, and the hook member 67 returns to the direction in which it engages with the engagement gear 66.

    A cam surface 81 is formed between the engagement teeth 74 adjacent to each other in the circumferential direction of the engagement gear 66. The cam surface 81 is configured such that the front end portion of the hook 73 of the hook member 67 released from the engagement with the engaging teeth 74 is brought into contact with the urging force of the urging means 69 while the seat back 4 is being moved forward. is there. The cam surface 81 receives the urging force of the urging means 69 via the hook 73 and urges the engagement gear 66 to rotate in the seat back forward direction together with the driven gear 65.

    Therefore, the cam surface 81 is a tooth surface proximal end of the engaging tooth 74 adjacent to the rear side in the rotational direction when the seat back is tilted forward from the tooth surface tip (the part farthest from the shaft center) of each engaging tooth 74. The radius gradually changes (inclined) toward (the part closest to the axis). The hook member 67 is provided so as to apply an urging force of the urging means 69 to the cam surface 81 from a direction that forms an acute angle on the front side in the rotational direction.

    Therefore, as shown in FIG. 11, when the seat back 4 is in a predetermined standing state, the hook member 67 is engaged with the engagement teeth 74 of the engagement gear 66. When the operating string 7A or 7B is pulled, as shown in FIG. 12, the release lever 71 rotates in the release direction, and accordingly, the hook member 67 rotates in the release direction, and the engagement teeth of the engagement gear 66 74. As a result, the driven gear 65 is released from the restraint on the vehicle body side by the hook member 67 and can be rotated in the forward direction of the seat back together with the seat back 4 that is biased by the winding spring as the forward biasing means. It becomes like this.

    Therefore, when the seat back 4 tilts forward, the driven gear 65 rotates together with the seat back 4 in the forward tilt direction. This means that the meshing position of the drive gear 62 and the driven gear 65 does not change, that is, it is not necessary to rotate the output shaft of the electric motor 33 via the drive gear 62 in the direction opposite to that when the seat back is raised. Means. For this reason, the rotational resistance of the reduction gears such as reverse torque generated when the electric motor 33 is rotated by an external force, meshing between the drive gear 62 and the driven gear 65, meshing between the drive gear 62 and the worm 63, and the like. It becomes possible to prevent the seat back from becoming a resistance.

    In addition, after the seat back 4 starts to move forward, the release lever 71 moves away from the hook member 67 as the seat back 4 rotates. As a result, as shown in FIG. 13, the pin abutting portion 77 of the release lever 71 is disengaged from the pin 76 of the hook member 67, and the hook member 67 cams the engagement gear 66 by the biasing force of the biasing means 69. It comes into contact with the surface 81. As a result, the driven gear 65 is urged by the urging means 69 so as to rotate in the forward direction of the seat back. For this reason, the driven gear 65 reliably rotates together with the seat back 4 in the forward direction of the seat back.

    As shown in FIG. 14, when the seat back 4 is in a completely forward-turned state, the hook member 67 is engageable with the engagement tooth 74 adjacent to or next to the cam surface 81 of the engagement gear 66. . Therefore, when the electric motor 33 is started, the drive gear 62 rolls the driven gear 65, and the seat back 4 can be raised. In addition, when the electric motor 33 is not rotated at all during the forward movement of the seat back 4 by setting the disposition pitch of the engagement teeth 74 to 120 degrees as described above, the seat back 4 is in the fully forward state. In this case, the tip of the hook member 67 is positioned immediately before the adjacent engaging tooth 74. Therefore, the delay time from when the electric motor 33 is started to when the hook member 67 is engaged with the adjacent engagement tooth 74 and the seat back 4 starts to stand up is reduced. This is advantageous for quickly standing up.

<Operation system of knuckle (holding mechanism) and transmission release means>
As shown in FIG. 15 (view of the lower portion of the seat back as viewed from the back side), the operation strings 7A and 7B are connected to the operation lever 85 at the lower portion of the seat back 4. The operating cords 7A and 7B and the operating lever 85 are movable operating parts for operating the knuckle 31 and the transmission release means of the electric motor part, that is, the inner cables of the first and second control cables 47 and 79. The movable operation part for towing 47a and 79a is comprised. The operation lever 85 has a shape in which an operation string connecting portion and a cable connecting portion are connected in an L shape, and a bent portion of the operation lever 85 is pivotably pivoted by a pin 87 to a bracket 86 fixed to the seat back frame 25. It is supported. The operation cords 7A and 7B extend in the vertical direction in the seat back 4, and the lower ends thereof are connected to the distal ends of the operation cord connecting portions extending to the side of the operation lever 85.

    On the other hand, on the cable connecting portion of the operation lever 85, a pulley 88 as a transmission member for transmitting the pulling operation force by the operation strings 7A and 7B to the first and second control cables 47 and 79 is connected to the pin 87 of the operation lever 85. A parallel pin 89 is rotatably supported. That is, in the control cables 47 and 79, the end portions on the operation portion side of the outer casings 47b and 79b are held by the casing holding portion 90 of the bracket 86, and the end portions on the operation portion side of the inner cables 47a and 79a. The parts are connected to each other. Thus, the connected portion of the inner cables 47a and 79a is wound around the pulley 88.

    Accordingly, when the operation string 7A or 7B is pulled and the operation lever 85 is rotated in the cable pulling direction, the pulley 88 is simultaneously moved in the same direction. At this time, if there is a relative play between the inner cables 47a and 79a of the two control cables 47 and 79, a difference occurs in the rotational resistance that the pulley 88 receives from the two control cables 47 and 79. As a result, the pulley 88 rotates so that the rotational resistance received from both control cables 47 and 79 becomes equal. That is, even if one of the inner cables becomes tensioned due to the rotation of the operating lever 88, the other inner cable having a large amount of play is still in a slack state, so that the pulley 88 moves in the cable pulling direction while Rotate to one inner cable side until the inner cable is in tension. For this reason, only one inner cable that has been in tension first is not pulled first.

    Then, after the pulley 88 absorbs the relative play between the inner cables 47a and 79a of the control cables 47 and 79 by the above rotation, the pulling operation force of the movable operation portion is applied to the inner cables 47a and 79a. It will be transmitted substantially. Accordingly, the inner cables 47a and 79a of both control cables 47 and 79 are started to be pulled simultaneously. That is, the knuckle lever 46 and the release lever 71 are pulled simultaneously.

<Operation of rear seat>
The operation of each part when operating the rear seat 2 as described above will be described.

-Advance seat back-
When the seat back 4 is in a predetermined standing state, the knuckle 31 is in a state where the knuckle lever 46 is rotated downward by the urging force of the first urging means 59 as shown in FIG. Therefore, the engagement surface 57 of the cam member 53 is in contact with the lock member 52, and the lock member 52 is engaged with the internal teeth 54 of the internal gear 51. Thereby, the seat back 4 is held in the standing state. Further, the knuckle lever 46 comes into contact with the interlock switch 42 (solid line state in FIG. 9), and the interlock switch 42 is in the off state. Therefore, even if the operation switch 8 is turned on, the electric motor 33 is not started. On the other hand, in the standing mechanism portion by the electric motor 33, the hook member 67 is engaged with the engagement teeth 74 of the engagement gear 66 as shown in FIG. 11.

    When the operating string 7A or 7B is pulled in such a standing state, the knuckle lever 46 is pulled by the first control cable 47 in the knuckle 31 and pivots upward together with the cam member 53, whereby the seat back 4 by the lock member 52 is pulled. Is released (see FIG. 7). That is, the seat back 4 can be tilted forward by the bias of the forward biasing means. On the other hand, in the standing mechanism portion, the release lever 71 of the transmission release means is pulled by the second control cable 79, whereby the hook 73 of the hook member 67 is disengaged from the engagement teeth 74 of the engagement gear 66, and the driven gear 65 is It becomes rotatable with respect to the side (see FIG. 12).

    When the operating cord 7A or 7B is pulled, even if there is relative play between the first control cable 47 and the second control cable 79 as described above, the relative rotation is caused by the rotation of the pulley 88. After the play is absorbed, the traction of both control cables 47 and 79 is started simultaneously. For this reason, for example, the situation where only the standing and holding of the seat back 4 by the knuckle 31 is released and the transmission release means of the electric motor unit does not operate is not caused. That is, simultaneously with the release of the upright holding of the seat back 4, the release lever 71 is actuated so that the driven gear 65 is rotatable with respect to the vehicle body side.

    In particular, when the seat back 4 is tilted forward by pulling the operation string 7A provided on the front surface of the seat back 4, when the seat back 4 starts to tilt forward, it becomes difficult to further pull the operation string 7A thereafter. Become. Accordingly, when the operator starts to tilt forward, the operator usually stops the pulling operation of the operation cord 7A at that time, but even in that case, the release lever 71 does not operate due to the action of the pulley 85. The situation can be prevented.

    Therefore, whenever the seat back 4 is tilted forward by the urging force of the forward urging means, the driven gear 65 rotates together with the seat back 4 in the forward direction of the seat back. Therefore, the drive gear 62 of the electric motor 33 does not need to be substantially rotated, and the electric motor 33 can be prevented from becoming a forward resistance of the seat back 4. Further, when the worm 63 is coupled to the output shaft of the electric motor 33 as in the present embodiment, it is substantially impossible to rotate the worm 63, that is, the output shaft by the reverse rotation of the drive gear 62. For this reason, if it is necessary to reversely rotate the drive gear 62 before the seat back 4 is moved forward, the electric motor 33 becomes a large resistance compared to the seat back. However, as described above, since it is not necessary to reversely rotate the drive gear 62, the electric motor 33 can be prevented from becoming the resistance of the seat back advance. Therefore, when the seat back 4 is moved forward, the seat back 4 can be quickly and surely moved forward only by the urging of the forward urging means without applying a large force. It will not be necessary to put effort in advance.

    When the seat back 4 starts to move forward from the predetermined standing state, as shown in FIG. 13, the release lever 71 is separated from the hook member 67, whereby the hook 73 of the hook member 67 is attached to the urging means 69. The force is pressed against the cam surface 81 of the engagement gear 66. As a result, a force that rotates in the forward direction of the seat back is applied to the engagement gear 66 by the biasing means 69, and the rotation of the driven gear 65 in the forward direction of the seat back is urged. Therefore, it is possible to prevent the rotational force in the reverse rotation direction from being generated in the drive gear 62, that is, the electric motor 33 becomes the resistance of the seat back advance. When the seat back 4 is folded completely over the seat cushion 3, the hook member 67 is engaged with the engagement teeth 74 adjacent to the cam surface 81 of the engagement gear 66 as shown in FIG. Become.

    Even when the pulling of the operation cords 7A and 7B is released before the release lever 71 is released from the hook member 67, the hook member 67 is temporarily removed from the engagement surface 74 of the engagement gear 66 before the front of the seat back 4. By hooking, the hook member 67 comes into contact with the cam surface 81.

    On the other hand, on the knuckle 31 side, the internal gear 51 rotates together with the seat back 4 as shown in FIG. 7 when the seat back 4 starts to move forward, so that the lock member 52 rides on the raised surface 55 of the internal gear 51. It becomes a state. While the lock member 52 is on the raised surface 55, the seat back 4 is in the fully forwarded state. Therefore, even if the pulling of the operation cords 7A and 7B is canceled in the middle of the forward movement of the seat back 4, the seat back 4 continues to be forwarded by the forward biasing means. Further, since the knuckle lever 46 is separated from the interlock switch 42 when the lock member 52 rides on the raised surface 55, the interlock switch 42 is in an on state (a state in which energization to the electric motor 33 is permitted when the operation switch 8 is turned on). Even if the pulling of the operation strings 7A and 7B is released, the ON state is maintained.

    When the pulling of the operation strings 7A and 7B is released, the lock teeth 56 of the lock member 52 are on the raised surface 55 of the internal gear 51, so that the knuckle lever 46 does not return completely, and therefore the first control The cable 47 can sag.

    As the seat back 4 moves forward, the seat cushion 3 is pushed forward by the seat back 4, and as shown in FIG. 2, the link 13 falls forward and the seat cushion 3 descends, and the seat back 4 is folded on top of it. It becomes a state. As a result, the luggage compartment 5 expands toward the passenger compartment, and the luggage can be placed on the back surface of the seat back 4.

-Standing seat back-
In the fully forward position where the seat back 4 is folded over the seat cushion 3, the interlock switch 42 is in the ON state as described above, so that when the operation switch 8 of the luggage compartment 5 is pressed, the battery is energized. The electric motor 33 is activated (see FIG. 4). On the other hand, as shown in FIG. 14, in the fully forwarded state, the hook member 67 is engaged with the engaging teeth 74 of the engaging gear 66, and the driven gear 65 is prevented from rotating in the forward direction of the seat back. is there.

    Therefore, when the drive gear 62 rotates due to the activation of the electric motor 33, the rotational reaction force is received by the driven gear 65, and the drive gear 62 rolls on the teeth of the driven gear 65. That is, the seat back 4 rises. While the seat back 4 is standing, as shown in FIG. 7, the lock member 52 of the knuckle 31 is on the raised surface 55 of the internal gear 51, so that the interlock switch 42 is kept on. Therefore, as long as the operation switch 8 is pressed and turned on, the electric motor 33 maintains the operating state.

    When the seat back 4 is in the predetermined standing state shown in FIG. 11, the internal teeth 54 of the internal gear 51 face the lock member 52 as shown in FIG. 6. Thereby, the lock member 52 meshes with the internal teeth 54, and the seat back 4 is held in the upright state. At the same time, the knuckle lever 46 is rotated downward by the urging of the first urging means 59 to contact the interlocking switch 42, and the interlocking switch 42 is turned off. For this reason, even if the operation switch 8 is kept pressed, the energization of the electric motor 33 is interrupted by the interlock switch 42, and the electric motor 33 is not in a state where no torque is generated.

    Thus, by continuing to press the operation switch 8, the seat back 4 can be raised to a predetermined standing state. When the seat back 4 is in a predetermined standing state, the operation of the electric motor 33 is stopped even if the operation switch 8 is kept pressed, and the seat back 4 is reliably held in the standing state. Therefore, when the occupant raises the seat back 4 from the forward position, it is not necessary to operate the operation switch 8 while confirming the standing state of the seat back 4, and the operation switch 8 in the luggage compartment 5 away from the rear seat 3 is eliminated. Even with this operation, the seat back 4 can be reliably brought into a predetermined standing state. That is, the seat back 4 is not in an almost upright state than planned or is not tilted too far backward, so that it is avoided that the seating comfort is deteriorated, and there is no luggage storage space on the back of the seat back. It is also possible to avoid becoming too narrow.

    Further, since the electric motor 33 does not generate torque, it is possible to avoid an overload from acting on the seat back 4 or the knuckle 31 and the like, which is advantageous for improving the durability of the rear seat 2.

    Further, since the operation switch 8 is an automatic return type switch, if the hand is released from the operation switch 8 while the seat back 4 is standing up, the power supply to the electric motor 33 is cut off and the seat back 4 stops standing up. Accordingly, an object is likely to be sandwiched between the seat back 4 and the side wall of the vehicle body while the seat back 4 is being raised by the electric motor 33, or the baggage is likely to break due to the seat back 4 hitting the load in the luggage compartment 5. At this time, by releasing the hand from the operation switch 8, the seat back 4 can be stopped in the middle of standing to avoid a trouble. That is, in the luggage compartment 5, the seat back 4 can be raised from the forward-turned state while confirming safety.

    When the electric motor 33 is stopped while the seat back 4 is standing, the hook member 67 is engaged with the engagement teeth 74 of the engagement gear 66, and the driven gear 65 is prevented from rotating in the forward direction of the seat back. It is in. Therefore, although the seat back 4 receives the urging force of the forward urging means, the electric motor 33 becomes a resistor and cannot immediately fall forward. When the operation switch 8 is turned on again after the electric motor 33 is stopped while the seat back 4 is standing, the seat back 4 is raised to a predetermined standing state and the electric motor 33 is stopped. Can be held in.

    Further, when the operation switch 8 is turned on while pulling the operation cords 7A and 7B and tilting the seat back 4 forward from the standing state, the seat back 4 returns to the predetermined standing state. This is because the interlock switch 42 is in the on state as described above while the seat back 4 is moved forward, and the electric motor 33 is energized when the operation switch 8 is turned on. However, as shown in FIG. 13, the hook member 67 is disengaged from the engagement teeth 74 of the engagement gear 66 and hits the cam surface 81 during the forward movement, so that even if the drive gear 62 is rotated by the electric motor 33, the seat back 4 does not immediately turn in the standing direction. Due to the rotation of the drive gear 62, the driven gear 65 and the engagement gear 66 rotate in the forward direction of the seat back, and the engagement teeth 74 of the engagement gear 66 engage with the hook member 67, thereby causing the seat back of the driven gear 65 to move. The seat back 4 rises from the point when the forward rotation is prevented.

-Reversing the seat back-
When the seat back 4 is in a predetermined standing state, the interlock switch 42 is in the OFF state as described above. From this state, the operation switch 8 is erroneously turned on while the operation cords 7A and 7B are pulled to release the holding of the seat back 4 by the knuckle 31 in order to press the seat back 4 and tilt backward. Then, since the interlock switch 42 is turned on by pulling the operation strings 7A and 7B, the electric motor 33 is energized and rotates. However, the fact that the operation strings 7A and 7B are pulled means that the engagement between the hook member 67 and the engagement gear 66 is released. The torque is not transmitted. That is, the seat back 4 does not fall down later depending on the electric motor 33, and safety is improved.

    To tilt the seat back 4 backward, pull the operating strings 7A and 7B and push the seat back 4 backward against the force that the seat back 4 tends to tilt forward by the bias of the forward biasing means. become. For example, the seat back 4 may be pushed backward by the back of the occupant in the seated state. When the pullback of the operation cords 7A and 7B is released when the seat back 4 is at an appropriate backward angle, the lock member 52 of the knuckle 31 engages with the internal teeth 54 of the internal gear 51, and the seat back 4 Is held at the backward angle.

    In the state where the operation cords 7A and 7B are pulled, the hook member 67 is separated from the engaging gear 66 as shown in FIG. It can be rotated in the direction. Therefore, the driven gear 65 rotates rearward together with the seat back 4 while maintaining the same meshing position with the drive gear 62, and the electric motor 33 does not become a reverse resistance of the seat back.

    In addition, the release lever 71 is restricted in its posture by the second control cable 79 so as to come into contact with the pin 76 in a state where the seat back 4 is in the standing state, and torque transmission suppression of the electric motor 33 is suppressed. Means. That is, as the inclination of the seat back 4 toward the rear side increases as the seat back 4 moves backward, the release lever 71 also moves so as to incline backward as a whole. Accordingly, the hook member 67 moves backward. The hook member 67 and the engagement tooth 74 of the engagement gear 66 are disengaged from each other. Therefore, even if the electric motor 33 is driven, the engagement gear 66 idles (swings) together with the driven gear 65, and the seat back 4 is prevented from being moved backward.

    With such a function, for example, when the occupant pulls the operation cords 7A and 7B to move the seat back 4 backward while the operation switch 8 is unexpectedly operated when the occupant is seated on the seat, (2) Even if the engagement between the hook member 67 and the engagement gear 66 is not released due to abnormal deterioration of the control cable or the like, if the backward inclination degree of the seat back 4 becomes a predetermined level or more (in side view, If the angle between the seat back 4 and the horizontal line is equal to or less than a predetermined angle), the seat back 4 will not be moved backward. Alternatively, immediately after the occupant pulls the operation cords 7A and 7B, even if an abnormal backward start is started due to the above-described factors, the backward movement of the seat back 4 proceeds thereafter, and the backward reverse degree exceeds a predetermined level. If it becomes, the seat back 4 will not be pushed back. As a result, damage to the luggage in the luggage compartment and the uncomfortable feeling given to the seated occupant can be alleviated. The predetermined angle can be changed depending on the shape and arrangement of the release lever, and the seat back 4 is only slightly tilted backward from the standing state to restrict further rearward movement, that is, the rear by the electric motor 33. It is also possible to substantially control the fall.

    Further, when the seat back 4 is in the rearward state, when the operation cords 7A and 7B are pulled and the holding of the seat back 4 by the knuckle 31 is released, the seat back 4 is in the rearward state by the urging of the forward urging means. Try to get up from. Also in this case, since the hook member 67 is disengaged from the engagement gear 66 by the rotation of the release lever 71, the seat back 4 can be raised without receiving resistance by the electric motor 33. Then, when the operation of the operation cords 7A and 7B is released when the seat back 4 is raised to a desired angle, the lock member 52 of the knuckle 31 engages with the internal teeth 54 of the internal gear 51, and the seat back 4 Is held at this angle. Further, when the state where the operation cords 7A and 7B are pulled is continued, the knuckle 31 remains in the released state, so that the seat back 4 continues to advance forward from the backward state.

<Other embodiments relating to the operation system of the knuckle and the transmission release means>
In the above embodiment, the portion where the ends of the inner cables 47a and 79a are connected to each other is wound around the rotatable pulley 88. However, instead of the pulley, a transmission member having a semicircular sliding surface is fixed to the movable operation portion. Then, the portion where the cable is connected is wound around the semicircular sliding surface, and the connected portion is slid on the sliding surface to absorb the relative play of the inner cables 47a and 79a. You may do it.

    Next, FIG. 16 shows another embodiment relating to the transmission means of the operation system. In this embodiment, a swing rod 91 is employed instead of the pulley 88 of the previous embodiment. That is, the rocking rod 91 is rotatably supported by the cable connecting portion of the operation lever 85 by the pin 92 parallel to the pin 87 of the operation lever 85. Thus, the inner cables 47a and 79a of the control cables 47 and 79 are connected to both side positions of the swing rod 91 with the intermediate pivot point interposed therebetween. The direction connecting the connecting points of the inner cables 47 a and 79 a intersects the moving direction of the pivot point of the swing rod 91 by the rotation of the operation lever 85.

    The first biasing means 59 for biasing the knuckle lever 46 so that the seat back 4 is held upright and the second biasing means 78 for biasing the release lever 71 in the return direction are the latter. It is set to have a smaller urging force than the former.

    Therefore, when the operating string 7A or 7B is pulled and the operating lever 85 rotates in the cable pulling direction and the swinging rod 91 moves in the same direction, the control cables 47 and 79 are relatively positioned between the inner cables 47a and 79a. If there is a lot of play, there will be a difference in the resistance that the rocking rod 91 receives from both control cables. As a result, the oscillating rod 91 oscillates so that the resistances received from the control cables 47 and 79 are equal to absorb the relative play, and then transmits the traction operation force to the control cables 47 and 79. Will do. Accordingly, the traction operation force reaches the knuckle lever 46 and the release lever 71 at the same time. Thus, in the case of the present embodiment, the urging force of the second urging means 78 is smaller than the urging force of the first urging means 59, so that the release lever 71 operates in the release direction first, and then The knuckle lever 46 operates in the release direction. Therefore, it is advantageous in reliably preventing a situation in which only the upright holding of the seat back 4 is released and the transmission release means of the electric motor unit does not operate.

    In the embodiment employing the preceding pulley 88, the urging force of both the urging means 59 and 78 is set as described above, and the release lever 71 operates in the release direction first, and then the knuckle lever. 46 may operate in the release direction.

    FIG. 17 shows another embodiment relating to the pulling operation of both control cables 47 and 79. In this embodiment, the inner cables 47 a and 79 a of the control cables 47 and 79 are directly connected to the cable connecting portion of the operation lever 85. However, the first control cable 47 and the second control cable 79 are connected to a position closer to the pin (swinging fulcrum) 87 of the operation lever 85 in the former than in the latter.

    Therefore, when the operation string 7A or 7B is pulled and the operation lever 85 is rotated, the traction amount of the second control cable 79 far from the swing fulcrum becomes larger than that of the first control cable 47. For this reason, even if the play amount of the second control cable 79 is slightly larger than the play amount of the first control cable 47 due to aging, the release lever 71 is operated by reliably pulling the second control cable 78. be able to. Therefore, it is possible to prevent the transmission release means of the electric motor unit from operating even though the standing back of the seat back 4 is released.

    In the embodiment of FIG. 17 as well, the urging force of the urging means 59 and 78 can be set so that the latter is greater than the former.

<Others>
In a vehicle in which the above-described rear seat 2 is not installed, the structure of each of the above embodiments may be applied to a seat corresponding to the above-described intermediate seat 1.

It is a side view which shows a part of vehicle rear provided with the seat which concerns on this invention. FIG. 2 is a view similar to FIG. 1 in a state where the seat back of the rear seat is tilted forward. It is a perspective view which shows the frame structure of the said back seat. FIG. 4 is a drive circuit diagram of the electric motor for raising the seat back of the rear seat. It is a perspective view which shows the knuckle part of the said back side sheet | seat. It is a front view which shows the relationship between the said knuckle and an interlocking switch in the state which hold | maintained the said seat back in the standing state. FIG. 7 is a view similar to FIG. 6 in a state in which the holding of the seat back is released. It is a side view which shows the relationship between the knuckle lever and the interlocking switch in the standing-up state and the forward-turning state of the seat back. It is a figure which shows the relationship similar to FIG. 8 in the standing-up state of the said seat back, and a fall-down state. It is a perspective view which shows the standing mechanism part of the said seat back in a seat back standing state. It is a side view which shows the said standing mechanism part in a seat back standing state. It is a side view which shows a state when the operating string is pulled in the said standing mechanism part in the seat back standing state. It is a side view which shows the said standing-up mechanism part in the middle of a seat back forward fall. It is a side view showing the above-mentioned standing mechanism part in the state where the seat back is tilted forward. It is the figure which looked at the operation system of a knuckle and transmission cancellation | release means from the seat back back side. It is a figure which shows other embodiment of the same operation type | system | group. It is a figure which shows other embodiment of the same operation type | system | group.

3 Seat cushion 4 Seat back 7A, 7B Operation string (traction part)
31 Knuckles (holding mechanism)
33 Electric motor 46 Knuckle lever 47 First control cable 47a Inner cable 59 First biasing means 71 Release lever (transmission release means)
78 Second urging means 79 Second control cable 79a Inner cable 85 Operation lever 88 Pulley (transmission member)
91 Swing rod (Transmission member)

Claims (6)

A seat cushion, a seat back that is pivotable about the vicinity of the rear end portion of the seat cushion, and is capable of transitioning between a predetermined standing state and a forwardly tilted state that is tilted or collapsed toward the seat cushion, and the seat back; Urging means that urges the vehicle to rotate in the forward-turning direction, a holding mechanism unit that holds the seat back in the upright state, and when the holding of the holding mechanism unit is released In the vehicle seat device including the interlocking mechanism portion to be operated,
A first control cable connected to the holding mechanism and for releasing the holding of the seat back by the holding mechanism;
A second control cable connected to the interlocking mechanism and operating the interlocking mechanism;
A movable operation unit for pulling the inner cable of both the first and second control cables;
A transmission member that distributes and transmits the operation force of the movable operation unit to both the control cables,
The transmission member is variable with respect to the movable operation unit so as to absorb relative play between the two control cables with respect to the pulling operation when the movable operation unit is displaced in the pulling direction. is provided to,
Furthermore, the first urging means for urging the first control cable in the anti-traction direction, and the second urging means for urging the second control cable in the anti-traction direction,
The vehicle seat device according to claim 1, wherein the urging force of the second urging means is smaller than the urging force of the first urging means . In claim 1,
The transmission member is a pulley supported by the movable operation unit,
The vehicle control apparatus according to any one of the preceding claims, wherein the two control cables are connected to each other on the movable operation part side of each inner cable, and the connected part is wound around the pulley. In claim 1,
The transmission member is an oscillating rod whose intermediate part is pivotally supported by the movable operation part,
Each of the control cables is connected to each inner cable on both sides of the intermediate pivot point of the swing rod,
A vehicular seat device characterized in that a direction connecting the connecting points of the two control cables connected to the swing rod intersects a moving direction of the intermediate pivot point by the operation of the movable operating portion. . A seat cushion, a seat back that rotates about the vicinity of the rear end portion of the seat cushion, and is capable of transitioning between a predetermined standing state and a forwardly tilted state that is tilted or collapsed toward the seat cushion, and the seat A biasing means that biases the back so as to turn in the forward-turned state, a holding mechanism that holds the seatback in the upright state, and when the holding of the holding mechanism is released In the vehicle seat device provided with the interlocking mechanism portion to be operated,
A first control cable connected to the holding mechanism and for releasing the holding of the seat back by the holding mechanism;
A second control cable connected to the interlocking mechanism and operating the interlocking mechanism;
A movable operation unit for pulling the inner cable of both the first and second control cables,
The movable operation unit includes a lever to which the both control cables are connected,
In the first control cable and the second control cable, the former is connected to a position closer to the swing fulcrum of the lever than the latter ,
Furthermore, the first urging means for urging the first control cable in the anti-traction direction, and the second urging means for urging the second control cable in the anti-traction direction,
The vehicle seat device according to claim 1, wherein the urging force of the second urging means is smaller than the urging force of the first urging means . In any one of Claims 1 thru | or 4 ,
The vehicle seat device according to claim 1, wherein the movable operation unit includes a pulling unit that is provided on a front surface of the seat back and pulls the inner cables of the control cables by being pulled forward of the seat back. In any one of Claims 1 thru | or 5 ,
The seat cushion is provided on one member of the seat cushion or the vehicle body and the seat back, and by transmitting torque to the other member, the seat back is rotated around the rear end portion of the seat cushion to stand up. Equipped with an electric motor
As the interlocking mechanism portion, when a holding release operation of the holding mechanism portion is performed to bring the seat back into the forward-turned state, a force is generated between the electric motor of the one member and the other member. A vehicle seat device, characterized in that a transmission release means is provided that operates so as not to be transmitted.

Images