JP4622772B2 - Vehicle seat device - Google Patents

Description

    The present invention relates to a vehicle seat device.

    Regarding the interior structure of a vehicle such as an automobile, the passenger compartment and the luggage compartment at the rear of the passenger compartment are partitioned by the seat back of the last row of the multiple rows of seats arranged in front and rear, and the seat back is tilted forward It is generally known to fold a seat cushion and make a luggage storage space above the seat back, that is, to enable the cargo space to be expanded toward the passenger compartment (see Patent Document 1).

In addition, regarding a vehicle seat, there is also generally known 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 2). 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 are performed by an electric motor, and for this purpose, an operation switch that automatically returns to the off side. There is also known a proposal of disposing the seat behind the seat (loading chamber) (see Patent Document 3).
JP 2001-239870 A JP-A-2005-41406 Japanese Patent Laid-Open No. 2004-249962

    By the way, when the seat back is raised from a forward position from a position in the vehicle away from the seat, if the electric motor is employed as described above, the burden on the user is reduced. However, if the electric motor is used to advance the seat back from the standing state, the electric motor is inadvertently operated and the seat back falls forward even though an object is placed on the seat. In addition, there is a risk that the power consumption will increase. In addition, when the seat back is tilted forward, it is necessary to turn on the start switch of the electric motor, and as a result, the motor starts, and the seat back moves forward and the electric motor stops. This is disadvantageous in quickly moving the seat back forward.

In view of the above, an object of the present invention is to enable the seat back to be moved forward , upright , and backward, safely and with good operability.

In order to solve such problems, the present invention employs an electric motor for raising the seat back, while the seat back is moved forward manually, and the seat back in the rearward state is further moved by the electric motor. I tried not to put it back.

That is, the invention according to claim 1 is centered on the vicinity of the rear end of the seat cushion, and is tilted or tilted backward from the predetermined standing state, the forwardly tilted state that is tilted or collapsed toward the seat cushion side, and the above standing state. In a vehicle seat device that includes a seat back that can be rotated in a rearward-turned state and is installed on the front side of the vehicle adjacent to the luggage compartment,
An urging means for urging the seat back to rotate in the forward-turning direction;
A holding mechanism for holding the seat back in the upright state;
An operation member for releasing the holding of the seat back by the holding mechanism;
The seat cushion is provided in one member of the seat cushion or the vehicle body and the seat back, and transmits torque to the other member until the seat back in the forward-turned state is in the predetermined standing state. An electric motor that pivots and stands up around the vicinity of the rear end,
Is arranged at a predetermined portion of the vehicle away from the vehicle seat, the seat back e Bei an operation switch for operating the electric motor as will occur from the forward-tilted state,
When the seat back is released from being held by the holding mechanism, the seat back can be tilted or tilted backward from the standing state by pushing the seat back backward against the bias of the biasing means. Was
The holding mechanism is configured to hold the seat back in the backward state in addition to holding the seat back in the standing state.
Furthermore, it is characterized by further comprising a transmission restraining means for restraining the torque of the electric motor from being transmitted to the other member when the seat back is in the rearward state .

    Therefore, the forward movement of the seat back is not performed by the electric motor but by the urging force of the urging means, so that the forward movement of the seat back (the release of the holding mechanism by the operation member) is performed with an object placed on the seat. Even if done, no great force is applied to the object. That is, when the seat back is moved forward by the electric motor, the driving force of the electric motor works on the object even after the object is sandwiched between the seat cushion and the seat back. Such problems can be avoided. Although it is conceivable to detect the overcurrent of the electric motor and stop the electric motor, it is necessary to separately provide an overcurrent detection means for that purpose, and the present invention can be simplified.

    On the other hand, since the seatback is raised from the forward-turned state by the electric motor, the labor of the occupant is reduced. In addition, since the operation switch for raising the seat back is arranged at a predetermined part of the vehicle away from the seat, the passenger does not have to move to the seat back position for raising the seat back. At the same time, the seat back can be raised. For example, if the operation switch is arranged in the luggage compartment, the seat back can be raised as necessary while opening the back door of the vehicle and performing the loading operation.

In addition, when the electric motor is used for raising the seat back as described above, it is also conceivable that the electric motor also performs tilting (reclining) of the seat back to the rear. However, it is desirable to make the seat back stand-up speed as fast as possible. However, if the seat back is tilted backward by the same electric motor, the tilting speed is also increased, and fine adjustment of the tilt angle to the rear becomes difficult. Therefore, in the present invention, when the holding of the seat back by the holding mechanism is released, the seat back can be pushed down by the occupant pushing backward, and the holding mechanism can hold the seat back at an appropriate backward tilt angle again. In other words, the occupant can manually adjust the reclining angle.

In addition, for example, even if the occupant is seated and unexpectedly operates even if the electric motor is erroneously operated, the torque of the electric motor may be transmitted to the other member when the seat back is in a reverse state. It is suppressed, and further back-up of the seat back can be avoided, and damage to the luggage mounted in the luggage compartment and an uncomfortable feeling given to the occupant can be mitigated.

The invention according to claim 2 is centered on the vicinity of the rear end portion of the seat cushion, in a predetermined standing state, in a forwardly tilted state in which the seat cushion is tilted or overturned and folded, and incline or incline backward from the standing state. In a vehicle seat device that includes a seat back that can be rotated in a rearward-turned state and is installed on the front side of the vehicle adjacent to the luggage compartment,
An urging means for urging the seat back to rotate in the forward-turning direction;
A holding mechanism for holding the seat back in the upright state;
The seat cushion is provided on one member of the seat cushion or the vehicle body and the seat back, and transmits torque to the other member until the seat back in the forward-turned state reaches the predetermined standing state. An electric motor that rotates and stands up around the vicinity of the rear end,
The seat back can be tilted or tilted backward from the standing state against the urging of the urging means when the holding by the holding mechanism is released,
The holding mechanism is configured to hold the seat back in the backward state in addition to holding the seat back in the standing state .
Furthermore, it is characterized by further comprising a transmission restraining means for restraining the torque of the electric motor from being transmitted to the other member when the seat back is in the rearward state .

    Therefore, the seat back can be quickly raised by the electric motor from the forward state to the standing state. Further, after the seat back is erected, the holding mechanism releases the holding and the occupant pushes the seat back backward, so that the holding mechanism can hold the seat back in a state where it is tilted to an appropriate rearward tilt angle. . That is, the occupant can manually adjust the reclining angle.

Further, example embodiment, in a state where the occupant is seated, to be unexpected, even if operated is operated incorrectly electric motor, when the seat back is in the rear lying state, the torque of the electric motor is transmitted to the other member Is suppressed, and further back-up of the seat back can be avoided, and damage to the luggage loaded in the luggage compartment and a sense of discomfort given to the occupant can be mitigated.

As described above, according to the present invention, the seat back provided in one member of the seat cushion or the vehicle body and the seat back is transmitted to the other member, and the seat back in the forwardly-turned state is moved to the rear of the seat cushion. an electric motor for standing is rotated around the vicinity of the end portion, and a biasing means for biasing to fall before the seat back is provided, when the seat back by the holding mechanism to release the upright holding the seat back before The seat back is tilted or tilted backward against the urging force of the urging means so that the seat back can be held in the backward state by the holding mechanism. when in the state, since the torque of the electric motor has to be prevented from being transferred to the other member, the seat back forward tilting and standing, and after Can be performed safely and with good operability.

    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).

    Thus, 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 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 can be further reclined appropriately. Further, on the front side and the rear side of the seat back 4, operation strings 7, 7 are provided as operation members for operating the release of the holding by the holding mechanism. 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 able to rotate back and forth. 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. Thus, the knuckle 31 as a holding mechanism for holding the seat back 4 in a predetermined standing state and tilting or tilting backward to a tilted state is provided in the pivot support portion on the vehicle body center side among the pivot portions on both sides of the seat back 4. 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.

    The seat back 4 is provided with a relay member 34 that relays and transmits the operating force of the operating string 7 to the knuckle 31 and the engagement / release means on the electric motor 33 side. The relay member 34 is provided with urging means for urging the operation string 7 in the direction of returning the pulling. The engagement / release means will be described later. Further, a flat luggage placing plate 35 for forming a flat luggage placing surface is fixed to 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. Has been.

<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. A first cable 47 extending from the relay member 34 is connected to the knuckle lever 46. 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 urging means 59. Accordingly, when the knuckle lever 46 is pulled by the operating string 7 via the first cable 47, the cam member 53 rotates and the release surface 58 faces the surface facing the inside of the lock member 52 as shown in FIG. The contacted second form (seat back released state) is obtained.

    In the present embodiment, the operation string 7, the relay member 34, the first cable 47, the knuckle lever 46, the cam member 53, and the 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 operating string 7, 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 locked state against the urging force of the urging means 59. Therefore, even if the pulling by the operation string 7 is released, the interlock switch 42 is kept on.

    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.

    Further, 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 7 is pulled and the seat back is released, the seat back 4 is moved forward as described above. By pushing backward against the bias of the biasing means, it can be tilted backward as shown by the solid line. When the pulling of the operation cord 7 is released, the cam member 53 is rotated by the urging force of the urging means 59, and the lock member 52 is engaged with the inner teeth 54 of the internal gear 51. It is held in a state where the angle has fallen. 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 urging means 59 and is in contact with the interlock switch 42 (solid line in FIG. 9). Status). 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 biased by a biasing 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 cable 79 that extends from the relay member 34 described above and is connected to the operation string 7. That is, the pulling force of the operating cord 7 is transmitted to the release lever 71 via the second cable 79, and the release lever 71 rotates the hook member 67 against the urging force of the urging means 78. It is rotated in a direction in which the engagement with the gear 66 is released. In this case, the operation string 7, the relay member 34, the second cable 79, the release lever 71, and the biasing means 78 cancel the rotation prevention of the driven gear 65 by the clutch, and the electric motor 33 does not become a resistance when the seat back is moved forward. The transmission cancellation | release means to make it comprises.

    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 along 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 operation string 7 is pulled, the release lever 71 rotates in the release direction as shown in FIG. 12, and accordingly, the hook member 67 rotates in the release direction from the engagement teeth 74 of the engagement gear 66. Come off. 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 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 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 7 is pulled in this standing state, the knuckle lever 46 is pulled by the first cable 47 in the knuckle 31 and pivots upward together with the cam member 53, whereby the seat back 4 is held by the lock member 52. It 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 is pulled by the second 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 rotates relative to the vehicle body side. It becomes free (see FIG. 12).

    Therefore, when the seat back 4 is tilted forward by the bias of the forward biasing 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 operating string 7 is released before the release lever 71 is released from the hook member 67, the hook back 67 is once released from the engagement surface 74 of the engagement gear 66, so that the seat back 4 is moved forward. 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 string 7 is canceled in the middle of the forward movement of the seat back 4, the seat back 4 continues the forward movement 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 pull of the operation string 7 is released, the ON state is maintained.

    When the pulling of the operation cord 7 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. You 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 force of the urging means 59 to come into contact with the interlock switch 42, and the interlock 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 the operation string 7 is pulled and the seat back 4 is tilted 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 string 7 is 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 string 7, the electric motor 33 is energized and rotates. However, the fact that the operation string 7 is pulled means that the engagement between the hook member 67 and the engagement gear 66 is released, so that the torque is not applied to the seat back even if the electric motor 33 is operated. 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, the operating cord 7 is pulled, and the seat back 4 is pushed backward against the force that the seat back 4 is tilted forward by the bias of the forward biasing means. . For example, the seat back 4 may be pushed backward by the back of the occupant in the seated state. When the pull back of the operation string 7 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 It is held at a backward angle.

    In the state where the operation cord 7 is pulled, the hook member 67 is separated from the engagement gear 66 as shown in FIG. 12, so that the driven gear 65 is not subjected to the resistance by the hook member 67 and moves backward in the seat back direction. It can be rotated. 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.

    Further, the release lever 71 is regulated in its posture by the second cable 79 so as to come into contact with the pin 76 in a state in which the seat back 4 is in the standing state. Is configured. 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 cord 7 to move the seat back 4 backward while the operation switch 8 is unexpectedly operated when the occupant is seated on the seat, the second cable Even if the engagement between the hook member 67 and the engagement gear 66 is not released due to abnormal deterioration of the seat back 4 or the like, if the degree of backward tilt of the seat back 4 exceeds a predetermined level (in the side view, the seat back 4 If the angle between the horizontal line and the horizontal line is equal to or smaller than the predetermined angle), the seat back 4 will not be moved backward. Alternatively, even if an abnormal backward start is started due to the above-described factors immediately after the occupant pulls the operation cord 7, if the backward movement of the seat back 4 proceeds thereafter and the reverse degree becomes a predetermined level or more. 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 string 7 is pulled to release the holding of the seat back 4 by the knuckle 31, the seat back 4 is raised from the rearward state by the urging of the forward urging means. I'm going to go up. 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 operating cord 7 is released when the seat back 4 is raised to a desired angle, the lock member 52 of the knuckle 31 is engaged with the internal teeth 54 of the internal gear 51, and the seat back 4 Held at an angle. Further, if the state in which the operation string 7 is pulled is continued, the knuckle 31 remains in the released state, so that the seat back 4 continues forward from the backward state.

    Note that, in a vehicle in which the above-described rear seat 2 is not installed, the structure of the present embodiment 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 forward-turning 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.

DESCRIPTION OF SYMBOLS 1 Intermediate seat 2 Rear side seat 3 Seat cushion 4 Seat back 5 Cargo compartment 7 Operation string (operation member)
8 Operation switch 31 Knuckle (holding mechanism)
33 Electric motor 41 Drive circuit 42 Interlocking switch (forced shut-off means)
46 Knuckle lever (Mechanical member)
47 1st cable (operation force transmission member)
51 Internal gear (first engaging member)
52 Lock member (second engagement member)
53 Cam member 54 Internal teeth 59 Knuckle lever urging means 62 Drive gear 65 Driven gear 66 Engaging gear (clutch)
67 Hook member (clutch)
69 Hook member biasing means 71 Release lever (transmission release means)

Claims (2)

Centering on the vicinity of the rear end of the seat cushion, it is possible to rotate between a predetermined standing state, a forwardly tilted state that is tilted or folded over to the seat cushion side, and a backwardly tilted state that is tilted or tilted backward from the standing state. In a vehicle seat device provided with a seat back and installed on the front side of the vehicle adjacent to the luggage compartment,
An urging means for urging the seat back to rotate in the forward-turning direction;
A holding mechanism for holding the seat back in the upright state;
An operation member for releasing the holding of the seat back by the holding mechanism;
The seat cushion is provided on one member of the seat cushion or the vehicle body and the seat back, and transmits torque to the other member until the seat back in the forward-turned state reaches the predetermined standing state. An electric motor that pivots and stands up around the vicinity of the rear end,
Is arranged at a predetermined portion of the vehicle away from the vehicle seat, the seat back e Bei an operation switch for operating the electric motor as will occur from the forward-tilted state,
When the seat back is released from being held by the holding mechanism, the seat back can be tilted or tilted backward from the standing state by pushing the seat back backward against the bias of the biasing means. Was
The holding mechanism is configured to hold the seat back in the backward state in addition to holding the seat back in the standing state.
The vehicle seat device further comprises a transmission restraining means for restraining the torque of the electric motor from being transmitted to the other member when the seat back is in the rearward state . Around the rear end of the seat cushion, it pivots between a predetermined standing state, a forward-turned state that is tilted or folded over to the seat cushion side, and a backward-tilted state that is tilted or tilted backward from the standing state. In a vehicle seat device provided with a possible seat back and installed on the front side of the vehicle adjacent to the cargo compartment,
An urging means for urging the seat back to rotate in the forward-turning direction;
A holding mechanism for holding the seat back in the upright state;
The seat cushion is provided on one member of the seat cushion or the vehicle body and the seat back, and transmits torque to the other member until the seat back in the forward-turned state reaches the predetermined standing state. An electric motor that rotates and stands up around the vicinity of the rear end,
The seat back can be tilted or tilted backward from the standing state against the urging of the urging means when the holding by the holding mechanism is released,
The holding mechanism is configured to hold the seat back in the backward state in addition to holding the seat back in the standing state .
The vehicle seat device further comprises a transmission restraining means for restraining the torque of the electric motor from being transmitted to the other member when the seat back is in the rearward state .

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