JP4736579B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat provided with a power seat device and a power seat belt device.

  The front seat of an automobile can be adjusted by moving the seat cushion back and forth according to the size of the occupant seated by the slide device. There is a so-called so-called power seat device that can move (see, for example, Patent Document 1).

  On the other hand, there is a seat belt device provided in an automobile seat, which is a so-called so-called power seat belt device that automatically winds webbing by a driving means such as a motor and restrains an occupant.

In addition, there can be seen a high-grade automobile equipped with both the power seat device and the power seat belt device.
Japanese Patent Laid-Open No. 7-251657 (page 3, FIG. 1)

  However, in a vehicle seat equipped with a power seat device and a power seat belt device, since a drive motor is provided for each of the power seat device and the power seat belt device, at least two motors are installed around the seat. There is a need.

  For this reason, the use of a plurality of motors increases the cost, and the layout for installing the plurality of motors around the seat becomes difficult, and the weight increases, making it difficult to achieve weight reduction of the vehicle body.

  Therefore, the present invention provides a vehicle seat that can reduce the number of driving means by switching the driving force transmission path to the power seat apparatus and the power seat belt apparatus by driving these apparatuses with a common driving means. To do.

A vehicle seat according to the present invention includes a power seat device that slides a seat cushion back and forth by a seat slide mechanism, and a power seat belt device that winds up a webbing and restrains an occupant by a winding mechanism. A common drive means for driving the apparatus and the power seat belt apparatus, and the power of the drive means is switched by a switching means that operates in response to switching of the power seat apparatus or a selection means for selecting use of the power seat belt apparatus. The switching means is switched to one of the seat slide mechanism and the winding mechanism, and the switching means is normally set on the side that drives the winding mechanism of the power seat belt device. The seat slide mechanism of the power seat device when switched to the power seat device side The most important feature to be set on the side of the drive.

According to the vehicle seat of the present invention, the power seat device and the power seat belt device can be driven by the common driving means by switching the transmission path of the driving force by the selection means or the switching means. The number of installations can be reduced to reduce costs, the layout around the seat for installing the drive means can be facilitated, and the weight can be reduced by reducing the number of drive means.
Further, the switching means is normally set to the side that drives the winding mechanism of the power seat belt device, and when the selection means is switched to the power seat device side, the seat slide mechanism of the power seat device is driven. Therefore, even when the switching means fails, the power seat belt device can be operated by driving the driving means in an emergency, so that the occupant can be safely protected.

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

  1 to 4 show an embodiment of a vehicle seat according to the present invention, FIG. 1 is a side view of a power seat device and a power seat belt device mounted on the vehicle seat, and FIG. 2 is a power seat device and a power seat. Fig. 3 is a main part configuration diagram showing the driving force switching structure of the belt device, Fig. 3 is a main part configuration diagram showing the driving state of the power seat belt device in (a) and (b) the driving state of the power seat device, Fig. 4 It is explanatory drawing which shows the flowchart which controls switching of a driving force.

  As shown in FIG. 1, the vehicle seat 1 of the present embodiment winds a webbing 22 by a power seat device 10 that slides the seat cushion 2 back and forth by a seat slide mechanism 11 and a retractor 21 as a take-up mechanism, thereby And a power seat belt device 20 for restraining the vehicle.

  The seat slide mechanism 11 includes a slide rail 12 that extends in the vehicle front-rear direction and is installed on the vehicle body floor. The seat slide mechanism 11 is driven by a slide-side gear 13 that is rotatably attached to the frame of the seat cushion 2. The cushion 2 slides back and forth along the slide rail 12.

  The power seat belt device 20 folds the webbing 22 fed from the retractor 21 disposed in the rear portion of the seat cushion 2 through the shoulder anchor 4 provided on one side of the upper end of the seat back 3 and folded back. A shoulder belt 22a is formed, and the shoulder belt 22a is folded back by a tongue 23 to form a lap belt 22b to form a three-point seat belt.

  The end of the lap belt 22b opposite to the tongue 23 is fixed to the frame of the seat cushion 2, and the tongue 23 is detachably attached to an inner buckle 24 provided on the frame of the seat cushion 2.

  As shown in FIGS. 1 and 2, the vehicle seat 1 includes a motor 30 as a common driving means for driving the power seat device 10 and the power seat belt device 20, and the power seat device 10 or the power seat. A seat switch 31 as selection means for selecting use of the belt device 20 and switching means for switching and transmitting the power of the motor 30 to one of the seat slide mechanism 11 or the retractor 21 in accordance with the switching of the seat switch 31. 32.

  The motor 30 is disposed in a rear portion of the seat cushion 2 where the slide side gear 13 and the retractor 21 are disposed. The seat switch 31 is disposed on the seat cushion 2.

  The switching means 32 is normally set on the side that drives the retractor 21 of the power seat belt device 20, and when the seat switch 31 is switched to the power seat device 10 side, the seat slide mechanism of the power seat device 10. 11 is set on the drive side.

  Further, as shown in FIG. 2, the switching means 32 includes a first drive gear 33 that can mesh with the slide side gear 13 that drives the power seat device 10, and a seat belt side gear 25 that drives the power seat belt device 20. And a second drive gear 34 that can be meshed with the second drive gear 34. The second drive gear 34 is supported so as to be movable in the axial direction and includes a drive shaft 35 that is rotated by the motor 30. And a solenoid actuator 36 that moves in the axial direction and meshes one of the gear set of the slide side gear 13 and the first drive gear 33 or the gear set of the seat belt side gear 25 and the second drive gear 34. ing.

  The drive shaft 35 is constituted by a rotating shaft of the motor 30, and the drive shaft 35 is attached to the motor body 30 a so as to be movable in the axial direction, and the first drive gear 33 is coupled to one end of the drive shaft 35. The second drive gear 34 is coupled to the other end of the drive shaft 35.

  In the present embodiment, at the normal time, as shown in FIG. 3A, the first drive gear 33 and the slide side gear 13 are disengaged, and the second drive gear 34 and the seat belt side gear 25 are separated. 3 is set to the meshing state, and the driving force of the motor 30 can be transmitted to the retractor 21 via the gear train 26. On the other hand, the seat switch 31 is operated to turn on, whereby FIG. As shown in FIG. 2, the first drive gear 33 and the slide side gear 13 are engaged with each other, the second drive gear 34 and the seat belt side gear 25 are set in a disengaged state, and the driving force of the motor 30 is applied to the seat slide mechanism 11. Can be transmitted to.

  That is, one end portion of the drive shaft 35 is further protruded from the first drive gear 33, and the protruding end portion 35a is slidably inserted into the solenoid actuator 36. From the state of FIG. When the seat switch 31 is operated, the solenoid actuator 36 is driven (excited), and the drive shaft 35 is drawn, and the state shown in FIG.

  As shown in FIG. 2, the operation signal of the seat switch 31 is input to the controller 37 and processed, and a drive signal is output from the controller 37 to the solenoid actuator 36.

  In the present embodiment, a collision signal detected or predicted by the collision detection sensor 38 is input to the controller 37, and the solenoid actuator 36 is released by this collision signal and set to the state shown in FIG. The operating state of the belt device 20 is assumed.

  FIG. 4 is a flowchart for controlling the switching of the driving force executed by the controller 37. When starting by turning on the ignition switch or the like, first, in step S1, the seat belt is judged to be worn, and the seat belt is worn ( YES) and step S2, it is determined whether or not a collision signal from the collision detection sensor 38 has been input.

  If no collision signal is input (NO), it is determined whether or not the seat switch 31 is turned on in step S3. If it is turned on (YES), the solenoid actuator 36 is driven in step S4 to switch the switching means. 32 is set to the state of FIG. 3B, and the first drive gear 33 is engaged with the slide side gear 13.

  In the next step S5, when the seat switch 31 is operated forward and backward, that is, when the seat switch 31 is operated forward, the motor 30 is rotated forward in step S6 to slide the seat cushion 2 forward, while in step S5. When the seat switch 31 is operated backward, the motor 30 is reversed in step S7 to slide the seat cushion 2 backward.

  The driving of the motor 30 is continued by determining whether or not the sheet switch 31 is turned off in the next step S8. If the sheet switch 31 is turned on (NO), the process returns to step S5. If 31 is off (YES), the motor 30 is stopped in step S9, and the solenoid actuator 36 is released in step S10 to set the switching means 32 to the state shown in FIG.

  On the other hand, in an emergency (YES) when it is determined that a collision signal is input in step S2, the switching means 32 is set to the state shown in FIG. 3A by driving the motor 30 in step S11. Therefore, the retractor 21 is actuated via the second drive gear 34 and the seat belt side gear 25 in the meshing state, the webbing 22 is wound up, and the restraining force of the occupant C is increased.

  With the above configuration, according to the vehicle seat 1 of the present embodiment, the switching unit 32 transmits the power of the motor 30 to the seat slide mechanism 11 and the path to transmit to the retractor 21 when the seat switch 31 is turned on / off. Therefore, the power seat device 10 and the power seat belt device 20 can be driven by the common motor 30.

  For this reason, since the installation number of the motor 30 for driving the power seat apparatus 10 and the power seat belt apparatus 20 can be reduced and only one can be completed, the cost can be reduced and the motor 30 can be installed. Thus, the layout around the sheet 1 can be facilitated, and the number of motors 30 can be reduced to achieve weight reduction.

  In the present embodiment, the switching means 32 is normally set to the side that drives the retractor 21 of the power seat belt device 20, and the seat of the power seat device 10 is turned on when the seat switch 31 is turned on. Since the slide mechanism 11 is set on the driving side, even when the switching means 32 breaks down, the power seat belt device 20 is operated by driving the motor 30 in an emergency to safely protect the occupant C. can do.

  Further, the switching means 32 is provided with a first drive gear 33 that can mesh with the slide side gear 13 and a second drive gear 34 that can mesh with the seat belt side gear 25 and is supported so as to be movable in the axial direction. The drive shaft 35 rotated by the motor 30 and the drive shaft 35 driven by the selection of the seat switch 31 to move in the axial direction, the gear set of the slide side gear 13 and the first drive gear 33, or the seat belt side Since the gear 25 and the solenoid actuator 36 that meshes one of the gear sets of the second drive gear 34 are provided, the two gear sets are switched by the drive shaft 35 that moves in the axial direction when the solenoid actuator 36 is driven / released. Therefore, the power seat device 10 and the power seat belt device 20 can be switched reliably with a simple configuration. Kill.

  By the way, although this invention was demonstrated taking the example for the said embodiment, various other embodiment can be employ | adopted in the range which is not restricted to this embodiment and does not deviate from the summary of this invention.

The side view of the power seat apparatus and power seat belt apparatus which were mounted in the vehicle seat in one Embodiment of this invention. The principal part block diagram which shows the driving force switching structure of the power seat apparatus and power seat belt apparatus in one Embodiment of this invention. The principal part block diagram which shows the drive state of a power seatbelt apparatus in (a) and (b) the drive state of a power seat apparatus in one Embodiment of this invention. It is explanatory drawing which shows the flowchart which controls switching of the driving force in one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat cushion 10 Power seat apparatus 11 Seat slide mechanism 20 Power seat belt apparatus 21 Retractor 22 Webbing 30 Motor (drive means)
31 Seat switch (selection means)
32 switching means 33 first drive gear 34 second drive gear 35 drive shaft 36 solenoid actuator

Claims (2)

A power seat device that slides the seat cushion back and forth by a seat slide mechanism;
In a vehicle seat comprising a power seat belt device that winds webbing by a winding mechanism and restrains an occupant,
Common driving means for driving the power seat device and the power seat belt device;
A selection means for selecting use of a power seat device or a power seat belt device;
Switching means for switching and transmitting the power of the driving means to one of the seat slide mechanism or the winding mechanism in response to switching of the selection means ,
The switching means is normally set on the side that drives the winding mechanism of the power seat belt device, and on the side that drives the seat slide mechanism of the power seat device when the selection means is switched to the power seat device side. A vehicle seat characterized by being set . A power seat device that slides the seat cushion back and forth by a seat slide mechanism;
In a vehicle seat comprising a power seat belt device that winds webbing by a winding mechanism and restrains an occupant,
Common driving means for driving the power seat device and the power seat belt device;
A selection means for selecting use of a power seat device or a power seat belt device;
Switching means for switching and transmitting the power of the driving means to one of the seat slide mechanism or the winding mechanism in response to switching of the selection means,
The switching means includes a first drive gear that can mesh with a slide-side gear that drives a power seat device, and a second drive gear that can mesh with a seat belt-side gear that drives the power seat belt device. A drive shaft that is movably supported and rotated by the drive means;
Driven by the selection of the selection means to move the drive shaft in the axial direction, and one of the gear set of the slide side gear and the first drive gear or the gear set of the seat belt side gear and the second drive gear is moved. And a solenoid actuator for meshing.

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