JP4582651B2 - Air bag deployment device and coupling device - Google Patents

Description

  The present invention relates to an airbag deployment device and a coupling device, and more particularly to an airbag deployment device and airbag deployment suitable for deploying an airbag for mitigating an impact on an occupant such as a motorcycle at a stable timing. The present invention relates to a connecting device used for connecting an airbag deployment circuit and a vehicle body in the device.

A jacket, that is, a jacket that incorporates an inflating air chamber (airbag) as a shock absorber for reducing shocks to a passenger such as a motorcycle has been proposed. For example, Japanese Patent Application Laid-Open No. 2003-312569 discloses an airbag provided in a jacket worn by an occupant and connected to a vehicle body via a connecting device. FIG. 9 is a view showing a connecting device provided in a conventional airbag deployment device. In the figure, the coupling device 100 includes a projection 130 formed on a leaf spring 120 provided in the first coupling member 110 connected to the jacket side, and is inserted into the first coupling member 110. The coupling between the first coupling member 110 and the second coupling member 140 is maintained by engaging with the recess 160 formed on the side surface of the insertion portion 150 of the second coupling member 140. When a tension exceeding the coupling force between the convex portion 130 and the concave portion 160 acts between the first coupling member 110 and the second coupling member 140, the first and second coupling members The connection is released, the contact of the switch 170 is opened, and the airbag is deployed.
JP 2003-312569 A

  The coupling force of the coupling device described in Patent Document 1 is the friction between the concave portion 160 formed on the side surface of the insertion portion 150 and the leaf spring 120 in the first coupling member 110 pressed against the concave portion 160. Depends on power. However, when a member is sandwiched between springs having a simple shape as shown in FIG. 9, the force acting on the recess 160 varies greatly due to a slight difference in shape of the leaf springs. That is, since the second coupling member 140 is gripped by the convex portion 130 of the leaf spring 120, the leaf spring 120 and the insertion portion 150 are coupled by a slight difference in the distance between the convex portions 130 and 130. The power changes greatly. Therefore, the load that can separate the first coupling member 110 and the second coupling member 140 greatly varies depending on the processing accuracy of the leaf spring 120. For this reason, the first coupling member 110 and the second coupling member 140 are separated or not separated by a slight difference in acceleration when the occupant moves.

  Therefore, when a motorcycle or the like collides, the airbag is deployed at a certain timing so that the coupling device is disconnected when the load acting on the coupling device by the movement of the occupant exceeds a substantially constant value. There was a request to do so.

  The object of the present invention is to release the connection between the vehicle body and the occupant when the load generated by the acceleration due to the movement exceeds a certain value when the occupant moves by impact, and the airbag is deployed in response to the release. It is an object of the present invention to provide an airbag deployment device and a coupling device that can be made to operate.

In order to solve the above problems, the present invention provides a deployment device for an airbag incorporated in an occupant's clothing, a bottomed cylindrical inner cylinder connected to the occupant clothing, and an outer diameter of the inner cylinder on the opening side. An outer cylinder having an inner diameter matching the inner cylinder, and a state of being provided between the inner cylinder and the outer cylinder and biased by a spring in a direction to push the inner cylinder out of the outer cylinder and abutting against a stopper in the inner cylinder The rod disposed in the outer cylinder, the switch disposed at the bottom of the inner cylinder and engaged with one end of the rod, and the inner circumference of the outer cylinder provided in a recess on the outer peripheral side of the inner cylinder A sphere provided to engage with the annular groove formed on the inner cylinder so that the rod is displaced toward the inner cylinder side when the rod moves by a predetermined amount against the spring and the engagement with the annular groove is released. And the other end of the rod is provided on the vehicle side. It is connected to the cable drawn out from the cable via a manually detachable joint, and the switch is turned on when the rod is engaged and connected to the power source, charging the condenser for inflator ignition. And a second switch that is turned off when the rod is engaged and turned on when the rod is disengaged to discharge the charge of the capacitor to the inflator. Has the first feature.

Further, according to the present invention, the power source is an in-vehicle battery, and a conductive wire that connects the battery terminal to a contact terminal that is provided at a tip of the rod and forms a part of the first switch is disposed through the inside of the rod. There is a second feature.

Further, the present invention has a third feature in that a conducting wire passing through the inside of the rod is further connected to the battery terminal through the joint through the cable of the emergency fixed retractor. .

Furthermore, the present invention has a fourth feature in that the power source is a battery provided in the occupant clothing.

Further, the present invention provides a bottomed cylindrical inner cylinder connected to one of the airbag deployment circuit and the vehicle body, and an outside of the opening of the inner cylinder connected to the other of the airbag deployment circuit and the vehicle body. An outer cylinder having an inner diameter matching the diameter, a sphere disposed between the inner cylinder and the outer cylinder and engaging the inner cylinder and the outer cylinder, and engaging the sphere with the inner cylinder and the outer cylinder A rod that is displaced when a load greater than or equal to a predetermined value is applied in a direction in which the inner cylinder and the outer cylinder are separated from each other and moves the sphere to the disengaged position, and the rod. A switch comprising spring means for urging the rod in a direction opposite to the direction in which the load acts against the load, a contact provided at the tip of the rod and a contact provided on the inner cylinder side And the switch comprises the rod It is held on or off until the sphere is moved to the disengagement position, and is switched to the other on or off when the rod moves the sphere to the disengagement position. The connecting device has a fifth feature.

According to the first feature, during normal running, the rod is biased by a spring, the first switch is on, and the second switch is off, so the capacitor is charged. In the event of a collision, the emergency fixed retractor is actuated to fix the position, so that the rod moves against the spring, the first switch is turned off, and the second switch is turned on. As a result, the capacitor is discharged to the inflator and the airbag is deployed. When the occupant leaves the vehicle, the joint can be manually removed so as not to affect the switch section. According to the second feature, since the airbag is deployed when the load that separates the inner cylinder and the outer cylinder moves the rod biased by the spring in a direction opposite to the direction of the load, The airbag can be deployed with a stable load.

In the second feature, since the on-vehicle battery is connected to the connecting terminal at the tip of the rod via a conducting wire passing through the inside of the rod, the power is connected and disconnected from the power source by the movement of the rod.

According to the 3rd characteristic, since electric power can be supplied with the conducting wire which let the inside of the cable of an emergency fixed drawing device pass, it can prevent that wiring becomes complicated.

According to the 4th characteristic, since the electric power for operation | movement of an airbag can be obtained from the battery provided in clothes, wiring can be shortened.

According to the fifth feature, the vehicle body and the airbag deployment circuit can be connected, and the switch is turned on or off when a load acts so as to separate the inner cylinder and the outer cylinder from each other. The airbag can be deployed by using it in an airbag deployment circuit configured to urge the airbag when the switch is in a scheduled state of either on or off. In particular, since the switch can be switched by the amount of deformation of the spring means in the direction opposite to the direction of the load that acts, the switching timing of the switch is accurate.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a side view of a scooter-type motorcycle on which a rider equipped with an airbag according to an embodiment of the present invention rides. In FIG. 2, an airbag (not shown) is incorporated in a jacket 2 worn by a rider riding in the motorcycle 1. The airbag is folded and accommodated in the jacket 2 so as to correspond to a plurality of positions such as the back, belly, waist, neck, and shoulder of the rider. An inflator 3 for deploying an airbag is incorporated in the jacket 2. A connecting device 4 that connects the jacket 2 and the motorcycle 1 is provided at the rear of the jacket 2. The connecting device 4 includes a connector 5 connected at one end to the clothes worn by the jacket 2 or the rider, and an emergency fixed retractor (ELR) 7 connected to the other end of the connector 5 by a cable 6. The ELR 7 has a mechanism for winding the cable 6 or the wire or belt extended to the cable 6 with an elastic force such as a spiral spring, and the drawing speed of the wound cable 6 or the like exceeds a predetermined value. Sometimes there is a locking means for stopping the drawing of the cable 6 and the like. As ELR7, for example, a well-known structure employed in a seat belt retractor, such as JP-A-2000-6697, can be employed.

  An electric circuit for igniting the inflator 3 is provided in the connector 5 and the jacket 2 in a distributed manner. The inflator 3 is used for ignition from the battery mounted on the motorcycle 1 via the ELR 7, the cable 6, and the connector 5. Power is supplied.

  In the above configuration, when the rider moves forward on the motorcycle 1, the winding portion in the ELR 7 is pulled out and the cable 6 is extended. That is, the rider can move forward on the motorcycle 1. However, when the rider moves forward at an acceleration of a predetermined value or more, the ELR 7 is locked and the cable 6 is not extended, and the load applied to the connector 5 increases. When this load exceeds the set load of the connector 5, the connector 5 is disconnected, the switch in the connector 5 is opened, and the inflator 3 is ignited.

  1A to 1C are system configuration diagrams of an airbag deployment device. 1A to 1C, the connector 5 includes an inner cylinder 50, an outer cylinder 51, and a rod 52. The inner cylinder 50 is fitted to one end of the outer cylinder 51, is guided by the inner surface of the outer cylinder 51, and is movable in the longitudinal direction of the outer cylinder 51. A funnel-shaped through hole 53 is formed in the inner cylinder 50 from the outer peripheral side, and an annular groove 54 is formed in the outer cylinder 51 on the inner peripheral side. The ball 8 that is pushed from the inner cylinder 50 side to the outer cylinder 51 side and engages with the annular groove 54 in a state where the inner cylinder 50 is fitted to the outer cylinder 51 at a position where the through hole 53 and the annular groove 54 face each other. The hole 53 is accommodated. The bottom of the through-hole 53, that is, the small-diameter portion, has a diameter smaller than that of the sphere 8, and the inner cylinder so that the sphere 8 does not protrude from the outer circumference of the inner cylinder 50 when the sphere 8 falls into the bottom of the through-hole 3. It is determined in relation to a thickness of 50 ((outer diameter−inner diameter) / 2).

  A sliding bearing portion 55 is provided inside the outer cylinder 51, and the rod 52 is slidably inserted into the bearing portion 55. One end of the rod 52 is formed with a large-diameter portion 521 having an outer diameter adapted to the inner peripheral surface of the inner cylinder 50, and the other end of the rod 52 is a socket connected to the plug 9 of the cable 6 connected to the ELR 7. 522 is formed. Two positive and negative conducting wires 10 are arranged at the center of the rod 52, and a contact point (details will be described later) corresponding to the positive and negative of the conducting wire 10 is provided at the tip. The contact provided at the tip of the rod 52 constitutes the switch unit 13 in combination with a contact (details will be described later) provided at the bottom of the inner cylinder 50.

  The conducting wire 14 drawn out from the switch unit 13 is connected to a capacitor 15 and an inflator 3 provided in the jacket 2. The inner cylinder 50 is connected to the connecting portion 12 provided on the jacket 2 of the rider via the hook 11. The connecting portion 12 is firmly fixed, for example, by sewing to the jacket 2. The hook 11 is desirably flexible so as to have followability with respect to the moving direction of the rider, and is preferably a detachable latch so that the connector 5 can be separated from the jacket 2.

  The compression coil spring 16 is disposed between the bearing portion 55 and the large-diameter portion 521 of the rod 52, and the end of the large-diameter portion 521 contacts the stopper (rib) 501 in the inner cylinder 50. It is pressed by the compression coil spring 16 to the position.

  Two conductors are provided inside the cable 6 wound around the ELR 7, and one end of these conductors is connected to the vehicle-mounted battery 17 and the other end is connected to the plug 9. The conducting wire connected to the plug 9 and the conducting wire connected to the socket 522 are connected to the exposed connection terminal so as to be connected when the plug 9 and the socket 522 are joined. With this configuration, when the plug 9 and the socket 522 are connected, the voltage of the battery 17 is applied to the contact at the tip of the rod 52 via the conductor in the cable 6 wound around the ELR 7 and the conductor 10 in the rod 52. The

  In the configuration of the connector 5, when the rider wearing the jacket 2 moves forward at a speed equal to or higher than the set lock speed of the ELR 7 at the time of collision, the ELR 7 is locked. If the rider continues to move with the ELR 7 locked, the rod 52 acts to compress the compression coil spring 16. When the load applied to the compression coil spring 16 at this time exceeds the initial load (for example, 20 kgf), the compression coil spring 16 starts to bend and the rod 52 is displaced to the right side in the drawing.

  Then, when the compression coil spring 16 is greatly compressed and the rod 51 is displaced by a distance L or more so that the edge of the large-diameter portion 501 on the switch portion 13 side is located on the right side in the drawing, the sphere 8 becomes a through hole. It is displaced to the center of the inner cylinder 50 by a component force generated by the taper 53 and the taper of the annular groove 54 and escapes from the annular groove 54. When the rod 52 is displaced until the sphere 8 falls to the bottom of the through-hole 53, the coupling between the inner cylinder 50 and the outer cylinder 51 maintained via the sphere 8 is released, and the inner cylinder 50 escapes from the outer cylinder 51 ( (See FIG. 1C). The spring constant and the dimension L on the large diameter portion 521 are set so that the connector 5 is disconnected when a load of a predetermined value (for example, 40 kgf) or more is applied.

  In the present embodiment, the sphere 8 escapes from the annular hole 54 when the compression coil spring 16 is compressed by the distance L or more, but this can be modified as follows. That is, the compression coil spring 16 is incorporated in a compressed state in advance so as not to be deformed by a load less than a predetermined value (for example, 40 kgf) (preload is applied). By doing so, the compression coil spring 16 is not compressed in a normal rider movement in which the load is less than 40 kgf, and compression starts when the load reaches 40 kgf, such as during a collision. Therefore, even if the spring constant is small and the distance L is extremely shortened, the same effect as described above can be obtained by preloading. In addition, preloading also has an effect of being able to compensate for changes in load due to the familiarity of the contact portion in use and the degree of frictional force.

  Thus, when the connector 5 is released due to a load of a predetermined value or more, the engagement of the rod 52 with the switch portion 13 is cut off. If it does so, the switch part 13 will be in a collision detection state, and the inflator 3 will ignite.

  The detachable joint composed of the plug 9 and the socket 522 has a structure that allows the plug 9 to be removed from the socket 522 when the rider leaves the motorcycle 1. When the rider gets out of the vehicle, the plug 9 is pulled out from the socket 522 to release the connection between the ELR 7 and the connector 5 (FIG. 1B). On the other hand, the plug 9 has a locking mechanism so that the plug 9 does not come out of the socket 522 in the event of a collision. Therefore, when getting off, the lock mechanism is released and the plug 9 is removed from the socket 522. Such a joint employs a structure in which a push button or the like is manually operated to remove a latch. For example, a well-known vehicle seat belt attaching / detaching structure can be applied.

  3, 4, and 5 are circuit diagrams of the airbag deployment device, and the same reference numerals as those in FIG. 1 denote the same or equivalent parts. The switch unit 13 includes a normally open switch 131 and two normally closed switches 132 and 133. As will be described later, the normally closed switches 132 and 133 are composed of a contact provided at the end of the rod 52 and a contact provided on the switch portion 13 side, and the rod 52 is inserted into the inner cylinder 50 and has a large diameter. When the part 521 is in contact with the rib 501, the normally closed switches 132 and 133 are closed and the normally open switch 131 is open. The normally open switch 131 and the normally closed switch 132 are connected in series and arranged on the positive power line for the inflator 3. The normally closed switch 133 is disposed on the negative power supply line (earth line) for the inflator 3. A resistor 18 and a capacitor 15 having one end connected to the positive power line between the normally open switch 131 and the normally closed switch 132 and the other end connected to the ground line are provided.

  In this circuit configuration, when the rod 52 is urged by the compression coil spring 16 and pressed toward the bottom of the inner cylinder 50, that is, when the inner cylinder 50 is coupled to the outer cylinder 51, the normally open switch 131 is opened, and normally closed switches 132 and 133 are closed. Therefore, in this state, the voltage of the battery 17 is applied to the capacitor 15 and electric charges are accumulated in the capacitor 15 so that the potential of the capacitor 15 rises.

  When the rider moves greatly forward of the vehicle body at the time of the collision, the inner cylinder 50 is detached from the outer cylinder 51, and the tip of the rod 52 is separated from the switch section 13, so that the normally open switch 131 is closed and the normally closed switch 132 is closed as shown in FIG. 133 open. As a result, the electric charge accumulated in the capacitor 15 flows as an ignition current in the inflator 3, and gas is supplied from the inflator 3 to the airbag.

  When the rider gets out of the vehicle, the plug 9 is removed from the socket 522 while the inner cylinder 50 and the outer cylinder 51 are connected. In this case, as shown in FIG. 5, the plug 9 is simply removed from the socket 522, and the normally open switch 131 is kept open and the normally closed switches 132 and 133 are kept closed. A current flows through the resistor 18 due to the accumulated charge, and the charge is discharged according to a time constant determined by the capacitor 15 and the resistor 18.

  FIG. 6 is a cross-sectional view of the main part of the connector showing an example of the switch unit 13. In FIG. 6, a substrate 19 is provided at the bottom of the inner cylinder 50 that is a bottomed cylinder, and a normally open switch 131 and a resistor 18 are disposed on the substrate 19. The normally closed switch 131 is preferably a stroke switch.

  A ring 20 made of a conductive material is joined to the tip of the rod 52, and a tip member 21 made of an insulating material is joined to the ring 20. Further, an annular contact 22 is joined to the tip member 21. The conducting wire 10 in the rod 52 extends to the tip of the rod 52, and its positive side is joined to the inner periphery of the ring 20. Further, the negative side of the conductive wire 10 penetrates the inner circumferential space of the ring 20 to the tip member 21, penetrates the tip member 21, and is joined to the annular contact 22.

  A contact 23 that is elastically in contact with the outer periphery of the ring 20 in a state where the rod 52 is biased toward the switch portion 13 is provided, and this contact 23 is a normally open switch via a conductive portion on the substrate 19. It is connected to one terminal of 131. Further, this terminal is connected to the resistor 18 and the capacitor 15. Further, a contact 24 that elastically contacts the annular contact 22 is provided, and this contact 24 is connected to the resistor 18 on the substrate 19, the capacitor 15 in the jacket 2, and the negative side of the inflator 3. That is, the ring 20 and the contact 23 form a normally closed switch 132, and the annular contact 22 and the contact 24 form a normally closed switch 133. The positive side of the inflator 3 is connected to the other terminal of the normally open switch 131.

  Between the tip member 21 and the normally open switch 131, an actuator lever 25 that is cantilevered on the inner surface of the inner cylinder 50 is provided. By this actuator lever 25, the substantial stroke of the normally open switch 131 can be expanded.

  When the rod 52 is displaced toward the switch unit 13 due to the configuration of the switch unit 13, the operating member 131 c of the switch unit 13 is pushed by the tip member 21 of the rod 52, and the normally open switch 131 is opened. Yes. On the other hand, since the contact 23 is in contact with the outer periphery of the ring 20 and the contact 24 is in contact with the annular contact 22, the voltage from the battery 17 is applied to the capacitor 15.

  When the rod 52 is displaced away from the switch portion 13 at the time of collision, the contact between the ring 20 and the contact 23 and the contact between the annular contact 22 and the contact 24 are cut off, and the normally open switch 131 is closed.

  In the above-described embodiment, power is supplied from the vehicle-mounted battery 17, but a battery as a power source may be provided in the jacket 2. FIG. 7 is a circuit diagram of an airbag deployment device according to a second embodiment of the present invention, where the same reference numerals as those in FIG. 3 denote the same or equivalent parts. The positive side of the battery 17A reaches the socket 522 through the normally closed switch 133, and is connected to the normally closed switch 132 through the plug 9A. The normally closed switch 132 is connected to the normally open switch 131, and the normally open switch 131 is connected to the positive side of the inflator 3. Thus, it should be noted that the cable 6 connecting the plug 9A and the ELR 7 does not include an electrical conductor, that is, the plug 9A and the ELR 7 are simply mechanically connected.

  The positive side of the capacitor 15 and the resistor 18 is connected between the normally open switch 131 and the normally closed switch 132. The negative side of battery 17 </ b> A is connected to resistor 18, capacitor 15, and the negative side of inflator 3.

  In the second embodiment, the capacitor 15 is charged by the battery 17A while the plug 9A is connected to the socket 522. In the event of a collision, as in the embodiment described with reference to FIG. 3, when the normally open switch 131 is closed due to the charging potential of the capacitor 15, current flows through the inflator 3, the inflator 3 is ignited, and the airbag is deployed. .

  When the plug 9A is pulled out from the socket 522 when getting off the vehicle, a current flows through the resistor 18 due to the potential of the capacitor 15 and the capacitor 15 is discharged. Thereafter, the power is supplied from the battery 17A to the capacitor 15 until the plug 9A is inserted into the socket 522. Is not supplied, the capacitor 15 is not charged.

  Unlike the vehicle-mounted battery 17, the battery 17A is not automatically charged by the generator, and therefore needs to be charged or replaced as appropriate. It is desirable to provide a battery remaining capacity detection and warning means for notifying the timing of charging or replacement.

  The cable 6 extending from the ELR 7 to the plug 9 is not limited to being integrated with the power supply line, and the power supply line may be formed separately from the main body portion of the cable 6 receiving the tension. FIG. 8 is a diagram showing a main part of a power supply system provided separately in the cable 6. A power supply line 26 is wound around the cable 6 so that tension is not directly applied to the power supply line 26. One end of the power supply line 26 is connected to the battery 17 via the ELR 7, and the other end is connected to the plug 9.

  As described above, according to the present embodiment, no matter which direction the rider moves, when a load is applied to the connector 5, the load acts in a certain direction in which the compression coil spring 16 is compressed. The airbag can always be applied with a constant load applied to the connector 5.

  In the present embodiment, the inner cylinder is connected to the jacket, which is the occupant's clothing, and the outer cylinder is connected to the vehicle body side. However, the present invention is not limited to this, and the outer cylinder is connected to the jacket. It can also be modified to connect the cylinder to the vehicle body side.

It is a system configuration figure (the 1) of the air bag deployment device concerning one embodiment of the present invention. It is a system block diagram (the 2) of the airbag deployment apparatus which concerns on one Embodiment of this invention. It is a system configuration figure (the 3) of the air bag deployment device concerning one embodiment of the present invention. 1 is a diagram showing an example in which an airbag deployment device according to an embodiment of the present invention is applied to a motorcycle. It is a principal part circuit diagram (normal time) of an airbag deployment apparatus. It is a principal part circuit diagram (at the time of a collision) of an airbag deployment apparatus. It is a principal part circuit diagram (at the time of a passenger alighting) of an airbag deployment apparatus. It is sectional drawing which shows an example of a switch part. It is a principal part circuit diagram (normal time) of the airbag deployment apparatus which uses the battery as a power supply. It is a figure which shows the wiring example of the conducting wire for electric power supply provided separately from the cable of ELR. It is a figure of the connection device concerning a prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Motorcycle, 2 ... Jacket, 3 ... Inflator, 5 ... Connector, 6 ... Cable, 7 ... ELR, 8 ... Ball, 9 ... Plug, 10 ... Conductor, 11 ... Hook, 12 ... Connection part, 13 ... Switch part 14 ... Conductor, 15 ... Capacitor, 16 ... Compression coil spring, 17 ... Battery, 50 ... Inner cylinder, 51 ... Outer cylinder, 52 ... Rod

Claims (5)

In the airbag deployment device built into the occupant clothing,
A bottomed cylindrical inner cylinder (50) connected to the occupant clothing (2) ;
An outer cylinder (51) having an inner diameter matching the outer diameter of the inner cylinder (50) on the opening side;
The inner cylinder (50) is provided between the inner cylinder (50) and the outer cylinder (51) and is urged by a spring (16) in a direction to push out the inner cylinder (50) from the outer cylinder (51). A rod (52) disposed in the outer cylinder in contact with the stopper (501) of the inner,
A switch part (13) disposed at the bottom of the inner cylinder (50) and engaged with one end of the rod (52);
The rod (52) engages with an annular groove (54) provided in a recess on the outer peripheral side of the inner cylinder (50) and formed on the inner periphery of the outer cylinder (51). A spherical body (8) provided so as to be displaced toward the inner cylinder side when moved by a predetermined amount and disengaged from the annular groove (54);
The other end of the rod (52) is connected to a cable (6) drawn from an emergency fixed retractor (7) provided on the vehicle side via joints (9, 522) that can be manually attached and detached. ,
The switch unit (13) is turned on when the rod (52) is engaged, is connected to the power source (17), and charges the capacitor (15) for inflator ignition. ) And when the rod (52) is engaged, it is off, and when the rod (52) is disengaged, it is turned on and discharges the capacitor (15) to the inflator. An air bag deployment device comprising two switches (131) . The power source (17) is an on-vehicle battery, and a lead wire (10) for connecting the battery terminal to a contact terminal (20) provided at the tip of the rod (52) and forming a part of the first switch (132, 133). The airbag deployment device according to claim 1, wherein the airbag is disposed through the inside of the rod . The conducting wire (10) passing through the inside of the rod (52) further passes through the cable of the emergency fixed retractor (7) via the joints (9, 522) and is connected to the battery terminal. The airbag deployment device according to claim 2. The airbag deployment device according to claim 1, wherein the power source (17) is a battery provided in the occupant clothing (2) . A bottomed cylindrical inner cylinder (50) connected to one of the airbag deployment circuit and the vehicle body;
An outer cylinder (51) having an inner diameter matching the outer diameter of the opening side of the inner cylinder (50) connected to the other of the airbag deployment circuit and the vehicle body;
A sphere (8) disposed between the inner cylinder (50) and the outer cylinder (51) and engaged with the inner cylinder (50) and the outer cylinder (51);
The spherical body (8) is held at a position where it engages with the inner cylinder (50) and the outer cylinder (51), while the inner cylinder (50) and the outer cylinder (51) are separated from each other by a predetermined value or more. A rod (52) that is displaced when a load is applied and that enables the sphere (8) to move to a disengaged position;
Spring means (16) for urging the rod (52) in a direction opposite to the direction of application of the load against the load acting on the rod (52);
A switch (13) comprising a contact (20, 22) provided at the tip of the rod (52) and a contact (23, 24) provided on the inner cylinder side;
The switch (13) is held on or off until the rod (52) moves the sphere (8) to the disengagement position, and the rod (52) is in the disengagement position. A connecting device characterized in that when the spherical body (8) is moved, the connecting device is switched to the other of on and off .

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