JP2512906Y2 - Car airbag safety device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a vehicle airbag safety device for ensuring the safety of a driver and passengers of a vehicle from an impact such as a collision of a vehicle. The present invention relates to a vehicle airbag safety device having an airbag module integrally provided with a collision sensor that detects a collision and operates the ignition means.

[Conventional technology]

2. Description of the Related Art Conventionally, an airbag device of this type includes an inflatable airbag, a gas generator having a gas generating material serving as an inflation gas for the airbag, and an ignition means for igniting the gas generating material of the gas generator. An airbag unit is provided at an appropriate place on the vehicle body such as a steering wheel, and a collision sensor for detecting a collision is provided at an appropriate place on the vehicle body such as an engine room or a seat, and the collision sensor and the airbag unit are electrically connected. Further, a separation type vehicle air bag device in which a battery of an automobile is used as a power source for activating the ignition means upon detection of a collision sensor has been put into practical use. However, the airbag unit, the collision sensor, and the battery as a power source are composed of three components, and the components are connected by wiring. I was worried about reliability due to disconnection. Therefore, a complete-type vehicle airbag device has been proposed in which the airbag module and the collision sensor are set as an airbag module, and the airbag module is fastened to the steering wheel. The airbag module includes an electric type that connects a power source (battery or capacitor) for operating the ignition means to the collision sensor, and a mechanical type that operates the ignition means with a hammer or the like that jumps out of the collision sensor (for example, JP-A-53-78536).

[Problems to be solved by the device]

The vehicle airbag device for fastening the airbag module integrally provided with the collision sensor for detecting the collision and activating the ignition means to the steering wheel, which has been described in the related art, has an advantage of a relatively simple structure. On the other hand, since it is easy to install, there is a problem in that it may be forgotten to be fastened just by mounting it on a steering wheel or the like. If you forget to tighten the mounting bolts etc. to the steering wheel etc., sufficient acceleration will not be transmitted to the collision sensor and it will not operate as a vehicle airbag safety device.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide an airbag module that also includes a collision sensor that detects a collision and activates the ignition means. It is an object of the present invention to provide an airbag safety device for a vehicle that can prevent forgetting to fasten.

[Means for solving the problem]

To achieve the above object, a vehicle airbag safety device according to the present invention comprises an inflatable airbag, a gas generator for supplying inflation gas to the airbag, and an ignition means for igniting the gas generator. In a vehicle airbag safety device having an airbag module integrally provided with a collision sensor for detecting a collision and activating the ignition means, a mounting member is fastened to a mounting portion of the airbag module to a vehicle body. A mounting detection switch for detecting the presence of the mounting detection switch, and the mounting detection switch is interposed in a blowing circuit of an in-vehicle horn or an alarm circuit for operating a vehicle power supply. The circuit is made conductive, and the sounding circuit or the alarm circuit is disconnected by fastening the mounting member.

[Action]

The mounting detection switch is provided on the mounting part for the steering wheel, etc., and is in the ON state before fastening the mounting member.
It is configured to turn off when it is fastened. When this mounting detection switch is in the ON state, the blowing circuit of the vehicle-mounted horn or the warning circuit of the vehicle-mounted power source remains connected, and when the vehicle-mounted power source is turned ON, the horn sounds or an alarm is issued. , I have noticed that I have forgotten to conclude the conclusion.

〔Example〕

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

FIG. 1 is a diagram showing a state in which a vehicle airbag safety device is fastened to a steering wheel, FIG. 2 is a circuit diagram of the vehicle airbag safety device, and FIG. 3 is another embodiment of a mounting detection switch. It is a drawing. Note that the following description will be made by taking an electric airbag module as an example.

In FIG. 1, the airbag module 1 is integrally housed in a base 2 and a cover 3. The projecting piece 2A of the base is fastened to the projecting piece 5A provided on the mounting seat of the steering wheel 5 as an in-vehicle facing part by a bolt 4 which is a mounting member. That is, the protruding piece 5A serves as a mounting portion. An attachment detection switch 6 is provided on the attachment seat of the steering wheel 5 to detect the fastening of the bolt 4. In addition to the steering wheel 5, the airbag module 1 may be attached to the instrument panel in front of the passenger seat, the back plate of the backrest of the front seat, or the like. Particularly, in the case of the steering wheel 5 shown in FIG. 1, since the horn switch 20 is provided, a sounding circuit or an alarm using a circuit for a vehicle-mounted horn wired in the steering wheel 5 via a slip ring 21. A circuit is used.

In FIG. 2, 1 is a circuit in the airbag module, 5 is a circuit attached to the steering wheel, and 6 is an attachment detection switch. Blowing circuit
Reference numeral 22 denotes a circuit of the vehicle-mounted horn 23 → slip ring 21 → horn switch 20 → slip ring 21 → vehicle-mounted power supply 24, in which the mounting detection switches 6 are interposed in parallel. The mounting detection switch 6 is closed (ON state) before being mounted on the steering wheel, but after mounting, it is opened (OFF) by fastening the bolt 4 as a mounting member as shown in FIG. It has become. Therefore, even one bolt 4
If you forget to close the switch, the switch 6 will remain closed,
When the vehicle-mounted power source 24 is turned on, electricity flows through the blowing circuit 22 and the vehicle-mounted horn 23 rings. Further, as shown by the lead line in FIG. 2, an alarm circuit 28 having an alarm lamp 26 and a resistor 27 may be used instead of the blowing circuit 22 described above. The resistor 27 is selected so that the vehicle-mounted buzzer 23 does not sound even if the alarm lamp 26 is turned on. It is also possible to add another blowing device in parallel to the alarm lamp 26. The switch 18 shown in FIGS. 1 and 2 is designed to be closed only when the airbag module 1 is mounted on the steering wheel 5, and is a safety switch for preventing malfunction due to impact such as mounting. It plays a role.

Next, details of the airbag module 1 will be described. 1 and 2, the airbag module 1 is
An airbag 10, a gas generator 11, an ignition means 12, a collision sensor 13, a battery 14, an ignition circuit 12, a collision sensor 13, and an operating circuit 15 for connecting the battery 14 in series, a base 2 and a cover 3. It is the one that is housed inside. In FIG. 1, the airbag 10 is inflated like a balloon at the time of a collision and serves as a cushioning material between the in-vehicle facing component and the occupant, and is normally folded small and stored in the case 3. The air bag 10 and the base 2 are airtightly mounted, and a gas generator 11 is provided in an airtight space between the air bag 10 and the base 2. The case 3 is provided with notches and thin portions (not shown) so that the airbag 10 can be deployed (opened) when the airbag 10 is inflated. Gas generator 11
Contains a temperature raising agent, a gas generating agent and a filter.
As the ignition means 12, an electric detonator or the like using a heating wire is used,
Paired with or embedded in a warming agent. The collision sensor 13 is capable of detecting a predetermined deceleration state and closing a contact at the time of abnormality to supply the electric power of the battery 14 to the ignition means 12, and various types have been put into practical use.

The power source may be a vehicle-mounted power source that charges an auxiliary power source such as a capacitor without using a battery.

FIG. 3 is a diagram showing an example of another attachment detection switch,
The mounting confirmation plate 30 is used. This attachment confirmation plate 30 is provided with a hole 30A, and is normally located at the position indicated by the chain double-dashed line by the tension spring 31. That is, when the protruding piece 2A of the airbag module and the protruding piece 5A of the steering wheel are fastened with the bolt 4, the mounting confirmation plate 30 must be pushed in the direction to fasten the bolt 4. When the mounting confirmation plate 30 is moved in the direction, the mounting detection switch 6'actuates, and the connection to the vehicle-mounted horn 23 in the blowing circuit 22 shown in FIG. 2 is cut off.

Next, the operation of the vehicle airbag safety device having the above-described structure will be described with reference to FIGS. 1 and 2. In FIG. 1, the airbag module 1 is attached to the steering wheel 5
First, the switch 18 is closed and the airbag module 1 is activated. Next, when a predetermined number of bolts 4 (three bolts in the illustrated example) are tightened, all the attachment detection switches 6 are turned off. Therefore, the switch 6 shown in FIG. 2 is opened, and the connection of the blowing circuit 22 to the vehicle-mounted horn 23 is cut off. However, if you forget to tighten even one,
Since a part of the attachment detection switch 6 shown in FIG. 2 remains closed and the connection to the vehicle-mounted horn 23 in the blowing circuit 22 remains, when the vehicle-mounted power supply 24 is turned on, the vehicle-mounted horn 23 rings. , Notice that I forgot to close it.

In the above description of the embodiments, the electric type air bag module is explained, but the present invention can be applied to the mechanical type air bag module. In addition, steering wheel 5
It is possible to make a blowing circuit using an on-vehicle horn not only when fastened to the vehicle but also when attached to the instrument panel.

[Effect of device]

A vehicle airbag safety device according to the present invention comprises an inflatable airbag, a gas generator for supplying inflation gas to the airbag, an ignition means for igniting the gas generator, and a collision detection for the ignition. In a vehicle airbag safety device having an airbag module integrally provided with a collision sensor for activating the means, a mounting detection switch for detecting fastening of a mounting member is mounted on a mounting portion of the airbag module to a vehicle body. Provided in a horn blowing circuit or an in-vehicle power source operation alarm circuit, the attachment detection switch conducts the blowing circuit or alarm circuit before fastening the attachment member, and by fastening the attachment member, the blowing circuit or alarm. It is designed to disconnect the circuit, and if this mounting detection switch does not disconnect the circuit by the mounting member,
The blowing circuit of the vehicle horn or the alarm circuit for operating the vehicle power supply remains connected, and when the vehicle power supply goes into an operating state, an alarm is issued so that you can notice that you have forgotten to fasten it. There is no fear that the acceleration will not be sufficiently transmitted to the collision sensor due to forgetting to tighten it, and the collision sensor will not operate as a vehicle airbag safety device.

[Brief description of drawings]

FIG. 1 is a view showing a state in which a vehicle airbag safety device is fastened to a steering wheel, FIG. 2 is a circuit diagram of the vehicle airbag safety device, and FIG. 3 is another embodiment of the detecting means. 1 ... Airbag module 2A ... Projection piece (mounting part) 4 ... Bolt (mounting member) 5 ... Steering wheel 5A ... Projection piece (mounting part) 6,6 '... Mounting detection switch 30 ... Mounting confirmation plate (mounting detection switch) 10 ... Airbag 11 ... Gas generator 12 ... Ignition means 13 ... Collision sensor 22 ... Blowing circuit 24 ... Vehicle power supply 28 ... Alarm circuit

Claims (1)

(57) [Scope of utility model registration request] 1. An inflatable airbag, a gas generator for supplying inflation gas to the airbag, an ignition means for igniting the gas generator, a collision sensor for detecting a collision and activating the ignition means. In an automotive airbag safety device having an airbag module integrally provided with, an attachment detection switch for detecting fastening of an attachment member is provided at an attachment portion of the airbag module to a vehicle body, and the attachment detection switch is provided. In addition to interposing in the blowing circuit of the vehicle-mounted horn or the alarm circuit of the vehicle-mounted power supply operation, the mounting detection switch is
The vehicle airbag safety device is characterized in that the sounding circuit or the warning circuit is conducted before the mounting member is fastened, and the sounding circuit or the warning circuit is cut by fastening the mounting member.