JP2005271732A - Occupant escape system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an occupant escape system wherein a seat can be surely moved in case of emergency, allowing an occupant to be quickly released from the seat. <P>SOLUTION: The occupant escape system has an electric seat device 10 comprising a seat main body 11 installed movably in a fore-and-aft direction in a vehicle, an electric driving source 12 operated by supply of electricity, a driving force transmitting means 13 for moving the seat main body 11 by connecting the seat main body 11 and the electric driving source 12, and a transmission releasing means 14 for releasing transmission of the driving force transmitting means 13; an air bag 20 installed in front of the seat main body 11; a detecting means 30 for detecting a vehicle state; and a control means 40 for developing the air bag 20 according to results detected by the detecting means 30 and thereafter operating the transmission releasing means 14. The control means 40 desirably has a backup power source 41. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an occupant detachment device that can easily move an electric seat in an emergency when an airbag is operated in an electric seat that is moved by an electric driving force such as a motor.

  In recent years, electric seats such as automobiles, which have been remarkably popular, are usually driven by a motor, and the driving energy depends on a battery power source. For example, in the event of a collision, the battery may be damaged or the wires of the wiring system may be bitten, resulting in a ground fault or disconnection failure. Therefore, after the collision, the battery power supply may be cut off and the electric seat may not be moved.

  In general, an electric seat slides the seat body by changing the driving direction by reducing the rotational driving force generated by the electric motor with a gear or the like. Normally, the driving force is transmitted in one direction from the motor side. For example, even if the seat body that receives the driving force is moved, the electric motor cannot be idled. Without it, the position of the seat body cannot be changed.

  Therefore, there is a demand for easily moving the position of the seat body when the vehicle body is crushed at the time of a collision and the occupant is sandwiched between the dashboard or airbag and the seat.

  By the way, Patent Document 1 and Patent Document 2 disclose a door lock control device that can release a door lock after a collision even when a vehicle collides and the power cable is disconnected. In addition, Patent Document 2 discloses a fire extinguishing device for preventing a secondary disaster in an emergency, a power shut-off device, a notification device for reporting an accident to the outside, and the like. Therefore, also with respect to the electric seat device, a means for solving the above problems is necessary.

Therefore, Patent Document 3 discloses an occupant detachment device having an actuator that removes a stopper that fixes a seat and moves the seat backward. However, in the occupant separation device of Patent Document 3, since the actuator and the seat are always interlocked, it may be difficult to move the seat when the electric power for operating the actuator is exhausted.
JP 07-269208 A Japanese Patent Laid-Open No. 06-234342 Japanese Patent Application Laid-Open No. 06-055985

  In order to solve the above-described problems, an object of the present invention is to provide an occupant detachment device that can be reliably moved in an emergency or the like and that allows an occupant to quickly detach from a seat.

  An occupant disengagement device according to the present invention includes a seat body that is installed in a vehicle so as to be movable in the front-rear direction, an electric drive source that operates by supplying electric power, and the seat body and the electric drive source connected to each other. An electric seat device comprising a driving force transmitting means for moving the main body and a transmission releasing means for releasing the transmission of the driving force transmitting means, an airbag mounted in front of the seat main body, and the state of the vehicle And detecting means for detecting, and control means for deploying the airbag according to a detection result of the detecting means and operating the transmission releasing means after the airbag is deployed.

  In the passenger detachment apparatus of the present invention, it is preferable that the control means has a backup power source. The electric drive source is preferably an electric motor.

  Preferably, the driving force transmission means includes a gear portion including a worm wheel that is rotationally driven by the electric motor, and a worm gear that is fitted to the worm wheel and moves the seat body by the rotation of the worm wheel. . At this time, it is preferable that the transmission canceling means has an actuator for canceling the fitting between the worm gear and the worm wheel. The actuator is preferably a solenoid that moves a central axis of the worm gear or the worm wheel.

  The occupant detachment device of the present invention has a transmission release means for releasing the transmission of the driving force transmission means for moving the seat body by transmitting the driving force by connecting the seat body and the electric driving source. The electric seat can be moved without using any driving force.

  Further, since the airbag is deployed according to the detection result of the detection means and the transmission release means is operated after the airbag is deployed, the transmission release means can be operated with an appropriate time difference from the collision. it can. Furthermore, if the control means has a backup power source, the electric seat can be reliably moved even when the supply of electric power for driving the electric drive source is cut off.

  The best mode for carrying out the occupant protection device of the present invention will be described below with reference to FIG.

  The occupant separation device of the present invention includes an electric seat device, an airbag, detection means, and control means. Each form will be described below.

  In the passenger detachment apparatus according to the present invention, the electric seat device includes a seat body, an electric drive source, a driving force transmission unit, and a transmission release unit.

  The seat body is not limited as long as it is a seat body installed in the vehicle so as to be movable in the front-rear direction. In the present invention, the electric seat device is a device particularly related to the front seat, but may be applied to a seat other than the front seat (such as the second and subsequent rows).

  The electric drive source is not particularly limited as long as it operates by supplying electric power, and is preferably an electric motor. The electric drive source is preferably operated by a battery power source of the vehicle.

  The driving force transmission means connects the seat body and the electric drive source to move the seat body. The driving force transmitting means is not particularly limited as long as the driving force from the electric driving source can be transmitted to the seat main body by connecting the seat main body and the electric driving source. For example, it is preferable to have a gear portion that includes a worm wheel that is rotationally driven by an electric motor, and a worm gear that is fitted to the worm wheel and moves the seat body by the rotation of the worm wheel. Since the gear portion can easily disconnect the driving force mechanically by releasing the engagement between the worm wheel and the worm gear (details will be described later), the gear portion is suitable for the passenger detachment device of the present invention. It is. Further, the rotation of the electric motor can be decelerated and the direction of the driving force can be changed by the worm wheel and the worm gear. If the direction of the driving force is changed in the front-rear direction of the vehicle, it can be applied to the slide mechanism described above.

  The transmission canceling unit cancels the transmission of the driving force transmitting unit. Normally, the electric seat device does not operate unless power is supplied. Further, in a general electric seat device, the driving force is only transmitted in one direction. Therefore, for example, when the supply of power is cut off in an emergency, the electric drive source cannot be operated. For example, even if an attempt is made to move the seat by applying force in the front-rear direction of the seat body, the electric drive source It is usually impossible to move the vehicle without supplying power. In the occupant detachment device of the present invention, the seat body can be moved without power supply by releasing the transmission of the driving force transmission means for moving the seat body by connecting the seat body and the electric drive source.

  “Release the transmission of the driving force transmission means” is to mechanically release the connection between the seat body and the electric drive source. For example, if the driving force transmission means has a gear portion composed of a worm wheel and a worm gear, the transmission release means preferably has an actuator for releasing the fitting between the worm gear and the worm wheel. By releasing the engagement between the worm gear and the worm wheel, the transmission of the driving force can be easily cut off mechanically. The worm gear can move the seat body in the front-rear direction without the rotational driving force of the electric motor (for example, the seat body is artificially pushed back).

  Since the actuator needs to operate even when the battery power of the vehicle is not supplied, it is preferable that the actuator be operated by a short-time energization from a backup power source or the like. For example, a solenoid that moves the central axis of the worm gear or worm wheel is preferable. By moving the central axis of at least one of the worm gear and the worm wheel, the mutual fitting can be easily released.

  Further, the transmission canceling means may have a backup power source that operates the actuator. Any backup power source may be used as long as it is generally used. The backup power source may have a control means (described later).

  The airbag and the detection means are not particularly limited as long as they are configured as a normal airbag device. The detection means may be a general sensor such as a G sensor that detects an impact (acceleration) generated in the vehicle, a vehicle speed sensor that detects the vehicle speed, or a weight sensor that detects the weight applied to the vehicle seat.

  The control means deploys the airbag according to the detection result of the detection means, and operates the transmission release means after the airbag is deployed. That is, a deployment signal for deploying the airbag and a release signal for operating the transmission release means are sent from the control means.

  By the way, in the airbag device, a control unit such as an airbag ECU performs a calculation process using the detection result from the detection unit as processing information, and determines whether the airbag needs to be deployed depending on whether the calculation result exceeds a threshold value. judge. Therefore, by performing arithmetic processing with time information added, it is possible to easily operate the transmission release means with an appropriate time difference from the deployment of the airbag.

  The control means preferably has a backup power source. Even when the power supply from the battery power supply is cut off by the backup power supply, the development signal and the release signal can be sent from the control means.

  Also, normally, the control means (airbag ECU) of the airbag apparatus assumes that the supply of power from the battery power supply is interrupted in the event of a collision, and at least operates the control means for a certain period of time and deploys the airbag once. It has a backup power supply that stores the power required for (deployment signal transmission). Therefore, the power of the backup power source can be shared by the airbag and the electric seat device (transmission release means), and the airbag can be deployed and the transmission release means can be released by the power of the same backup power source. .

  The occupant leaving device of the present invention is not limited to the above-described embodiment, and other configurations may be added.

  Below, the Example of the passenger | crew protection apparatus of this invention is described using FIGS. FIG. 2 is a block diagram showing the passenger detachment apparatus of the present embodiment. 3 to 5 are schematic views for explaining the electric seat device.

  In the passenger detachment apparatus according to the present embodiment, the electric seat 10 includes a seat main body 11 that is installed in the vehicle so as to be movable in the front-rear direction, an electric motor 12 that operates by supplying power, a seat main body 11, and an electric motor 12. Are connected to each other to move the seat body 11 and a solenoid 14 for releasing the transmission of the gear portion 13.

  The seat body 11 is largely divided into three parts: a cushion 111, a back pad 112, and a headrest 113 (FIG. 3). Among them, the cushion frame 111 ′ fixed to the lower part of the cushion 111 is movable in the front-rear direction of the vehicle by interlocking with a slide mechanism (described later).

  The electric motor 12 is fixed to the floor F of the vehicle via a fixture 121 (FIG. 4). The electric motor 12 is driven by power supplied from the battery power supply of the vehicle. The electric motor 12 rotates and drives two drive shafts 16 that extend from both ends of the electric motor 12 and are rotatably fixed. One end of the drive shaft 16 is coaxially fixed to the electric motor 12 via a bendable universal joint 15. A solenoid 14 (described later) is fixed to the other end portion of the drive shaft 16 via a release shaft 141. The drive shaft 16 is rotatably fixed to the release shaft 141. A worm wheel 131 is fixed to the central portion of the drive shaft 16. The worm wheel 131 is rotated by the rotational drive of the electric motor 12. The worm wheel 131 is accommodated in a gear box 130 (described later).

  The gear portion 13 includes a worm wheel 131 that is a gear, and a worm gear 136 having a helical tooth 137 that meshes with the worm wheel 131 and the fitting portion 135, and is housed in the gear box 130 (FIG. 5). In FIG. 5, the teeth 132 of the worm wheel 131 are formed over the entire circumference of the worm wheel 131, but only a part thereof is shown.

  Then, by the combination of the worm wheel 131 and the worm gear 136, the rotational drive from the electric motor 12 is decelerated and the drive direction is changed and transmitted to the worm gear 136. That is, when the worm wheel 131 is rotated in the direction AB in FIG. 5 by the rotational drive of the electric motor 12, the worm gear 136 moves in the direction A′-B ′ in FIG.

  When the worm gear 136 is moved in the A′-B ′ direction of FIG. 5 by the driving force of the electric motor 12, the slide mechanism 17 (FIG. 4) extending in the same direction as the moving direction of the worm gear 136 is interlocked. Since the slide mechanism 17 is fixed to the cushion frame 111 ′, the seat body 11 moves back and forth by the driving force of the electric motor 12. Therefore, the gear portion 13 connects the electric motor 12 side and the seat body 11 side, and transmits driving force.

  The solenoid 14 is fixed to the other end of the drive shaft 16 via a release shaft 141. The transmission of the gear portion 13 is mechanically released by the operation of the solenoid 14. The solenoid 14 moves the rotation center of the drive shaft 16 by moving the release shaft 141 in a direction substantially perpendicular to the fitting surface of the fitting portion 135 (arrow X in FIG. 4) (see FIGS. 4 and 5). Arrow Y). As a result, the worm wheel 131 is separated from the fitting portion 135 (arrow Z in FIG. 5), and the transmission of the gear portion 13 is released. Further, since the drive shaft 16 is connected to the electric motor 12 by the universal joint 15, there is no problem even if the electric motor 12 is fixed to the floor F when the solenoid 14 is operated.

  In the present embodiment, if the electric motor 12 and the drive shaft 16 are directly connected, the rotation centers of the drive shaft 16 and the electric motor 12 are moved together by installing the electric motor 12 so as to be movable. May be.

  In addition, the gear part 13, the solenoid 14, the universal joint 15, and the drive shaft 16 are arrange | positioned symmetrically with respect to the electric motor 12 (FIG. 4). After the solenoid 14 is actuated, the gear box 130, the drive shaft 16, and the universal joint 15 are in the state shown by the dotted lines in FIG.

  In addition, the passenger detachment apparatus according to the present embodiment includes an airbag 20, a sensor 30, and an airbag ECU 40.

  The airbag 20 is provided in front of the seat body 11. The airbag 20 is deployed as necessary by ignition of an inflator (not shown). Moreover, the sensor 30 always detects the state of the vehicle. The sensor 30 includes a G sensor that detects acceleration, a vehicle speed sensor that detects vehicle speed, and a weight sensor that detects the weight applied to the seat body 11.

  The airbag ECU 40 deploys the airbag 20 according to the detection result of the sensor 30, and activates the solenoid 14 after a predetermined time has elapsed since the airbag 20 was deployed. A detection result is input from the sensor 30 to the airbag ECU 40. The airbag ECU 40 controls collision determination, deployment of the airbag 20, and operation of the solenoid 14 based on the detection result input from the sensor 30.

  The airbag ECU 40 has a capacitor 41. The capacitor 41 stores electric power that can operate the airbag ECU 40 for a certain period of time, ignite the inflator, and operate the solenoid 14.

  Next, the operation of the passenger detachment device of this embodiment will be described.

  In the passenger detachment apparatus according to the present embodiment, the airbag ECU 40 performs arithmetic processing based on the detection result of the sensor 30 to determine whether the operating condition of the airbag 20 is necessary. When the airbag ECU 40 determines that the airbag 20 needs to be deployed, the airbag ECU 40 sends a deployment signal. The deployment signal is sent out when a current is sent from the capacitor 41 to an inflator (not shown) of the airbag 20, and the airbag 20 is deployed.

  Next, the airbag ECU 40 determines whether or not a predetermined time has elapsed since the airbag 20 was deployed. When the airbag ECU 40 determines that a predetermined time has elapsed since the deployment, the airbag ECU 40 sends a release signal. The release signal is sent when a current is sent from the capacitor 41 to the solenoid 14, and the solenoid 14 is activated.

  Since the drive shaft 16 is pushed upward by the operation of the solenoid 14, the fitting (135) between the worm wheel 131 and the worm gear 136 is released in the gear portion 13. Therefore, when the occupant himself puts weight on the seat body 11 and pushes it backward, or a third party presses the seat body 11 backward, the seat body 11 easily moves backward.

It is a block diagram showing the outline of the crew member detachment device of the present invention. It is a block diagram showing the crew member detachment device of an example. It is a perspective view of a seat body of a crew member detachment device of an example. It is a perspective view showing typically a crew member detachment device of an example. It is a perspective view showing typically the inside (gear part) of the gear box of the crew member detachment device of an example.

Explanation of symbols

10: Electric seat device 11: Seat body 12: Electric motor (electric drive source)
13: Gear part (driving force transmission means)
131: Worm wheel 136: Worm gear 14: Solenoid (transmission release means)
20: Airbag 30: Sensor (detection means)
40: Airbag ECU (control means)
41: Capacitor (backup power supply)

Claims (6)

A seat main body installed in a vehicle so as to be movable in the front-rear direction, an electric drive source that operates by supplying electric power, and a driving force transmission means that connects the seat main body and the electric drive source to move the seat main body. And an electric seat device comprising: transmission release means for releasing transmission of the driving force transmission means;
An airbag equipped in front of the seat body;
Detecting means for detecting the state of the vehicle;
Control means for deploying the airbag according to the detection result of the detection means, and operating the transmission release means after the airbag is deployed;
An occupant disengagement device characterized by comprising:   The occupant leaving apparatus according to claim 1, wherein the control means includes a backup power source.   The occupant separation device according to claim 1 or 2, wherein the electric drive source is an electric motor.   4. The driving force transmitting means includes a gear portion including a worm wheel that is rotationally driven by the electric motor, and a worm gear that is fitted to the worm wheel and moves the seat body by the rotation of the worm wheel. The passenger detachment device described.   The occupant disengagement device according to claim 4, wherein the transmission release means includes an actuator that releases the fitting between the worm gear and the worm wheel.   The occupant detachment device according to claim 5, wherein the actuator is a solenoid that moves a central axis of the worm gear or the worm wheel.

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