JPH0443651Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is an operating valve for an airbag device that instantly inflates the airbag with high pressure gas or explosive gas in the event of a collision with a vehicle such as a car, thereby protecting the safety of the occupants. This relates to the latch mechanism.

(Prior Art) The inventor of the present application has developed a valve casing of a thrust valve opening mechanism using a protruding valve rod and an inertia force actuating mechanism for pushing and operating the protruding valve rod as separate parts to improve the safety of installation, adjustment, and maintenance. We have already researched and devised an air bag device operating valve that can provide stable and reliable valve opening.

That is, a ball valve that is normally closed by the gas pressure of a high-pressure gas container that communicates with a valve housing having an outlet that communicates with the air bag is provided, and a protruding valve rod that pushes the ball valve open is provided. In this type of valve, a protrusion having a wedge-shaped claw portion on a part of the outer periphery of the distal end surface is provided at the tip of the protruding valve rod, and a spring is placed in a highly compressed state within a sheath pipe that is integrally arranged in parallel with the valve casing via a supporting plate. A locking lever with an inertial weight body is provided in which a sliding body interposed with is fitted and the sliding body is locked, and the support plate is provided with a locking lever with an inertial weight body,
An operating lever is pivotally mounted with one end corresponding to the rear end of the valve rod and the other end corresponding to the tip of the sliding body, and actuated by instantaneous activation of the sliding body as the locking lever releases the locking of the sliding body due to impact inertia force. This is an air bag device operating valve in which the ball valve is pushed open instantly by lever action.

(Problems to be solved by the invention) As a result of further research, the inventor of the present invention has further improved the safety and adjustment maintenance management through stable operation, which were strongly required in conventional airbag device operating valves of this type. We focused on problems that do not cause any problems or unexpected valve opening malfunctions.

(Means for solving the problem) This invention was made to solve the above problem, and this invention will be explained in detail below with reference to the drawings. This is a push-open type operating valve, and is configured as follows. 1 is an inlet port 3 that opens into the valve chamber 2;
The valve housing 1 has an outlet 4 branching at right angles at the rear thereof, and the valve housing 1 is provided with a high-pressure gas container 11 that communicates with the inside of the valve chamber 2 via a communication portion 7 . A ball valve 6 is provided in the valve chamber 2, and the valve seat 5 of the inlet 3 is always closed by the gas pressure of the high-pressure gas container 11. Reference numeral 8 denotes a protruding valve rod which is slidably inserted into the center of the inlet port 3 and is used to open the ball valve 6 by pushing it open, and a protruding head 9 having a wedge-shaped claw is provided at the tip thereof. ing. Note that the outlet 4 communicates with an air bag (not shown) through a rubber hose or the like. Further, 10 is an O-ring. FIG. 3 also shows a case of a fuse push-open type operating valve A that uses gunpowder explosion gas and has a gunpowder gas valve casing 12 equipped with a fuse 12a. Therefore, in this invention, a highly compressed spring 16 is interposed in the sheath pipe 13 connected to the operating valve A, and the sliding body 14 is fitted therein, and a locking latch portion is inserted into the notch 15 at the tip of the sliding body 14. The locking lever 18 that has been fitted with the locking lever 19 to lock the sliding body 14 is attached to the sheath pipe 13.
The supporting frame 17 is integrally attached to the distal end surface having the inner flange 13a, and is pivotally connected to the rear end yoke portion 17a of the support frame 17 by a pivot shaft 21. Next, reference numeral 22 denotes a rotor having a circumferential notch 22a for releasing the lock of the sliding body 14, and a protruding rod 24 is vertically provided on the outer periphery of the lower surface of the rotor. The rotor 22 is rotatably mounted on the rear end of a support shaft 23 horizontally installed on the front flange 17b of the support frame 17. Further, a pendulum 27 with a weight 28 is vertically disposed on the outer periphery of the lower surface of the front end of the support shaft 23, and engages with the protrusion 24 on the lower end of the rear surface to rotate the rotor 22. horizontal armrest 26
A rotary disk 25 having a protruding structure is rotatably mounted thereon. Note that the rotating disk 25 described above may not be used, and a pendulum 27 with a weight 28 may be provided vertically on the lower surface of the outer periphery of the rotor 22 instead of the protruding rod 24. When the sliding body 14 is locked, the rotor 20 attached to the tip of the locking lever 18 is inserted into the rotor 20.
2, so that the rotor 22 directly receives the action of the pendulum 27 at the time of a car collision (the rotor 22 is connected to the pendulum 27).
(when the rotary disk 25 is not used) or indirectly (when the rotary disk 25 in FIG. The operating valve A is instantly opened by pushing the valve A. Note that the notch 15 of the sliding body 14 and the locking latch 19 of the locking lever 18 fitted therein are both tapered so that they can be easily unlatched and removed, and the spring 16 of the sliding body 14 allows the locking latch 19 to be moved backwardly by the spring 16 of the sliding body 14. The trochanter 20 at the tip of the locking lever 18 is relatively strongly engaged with the rotor 22 due to the force of the locking lever 18 trying to jump out with a strong force.

(Effect of the embodiment) When the car is running under normal conditions, the weight 28
The attached pendulum 27 performs a pendulum movement with an allowable amplitude that is less than the latch operating amplitude. However, when a car is running at a speed exceeding a certain limit and an abnormal accident such as a collision occurs while the car is running, the pendulum 27 rotates significantly due to the impact, causing the arm rod 26 of the rotating disk 25 to collide. Since the rotor 22 hits the rod 24 violently, the rotor 22 is forcibly rotated, and the engagement between the rotor 20 of the locking lever 18 and the rotor 22 is released by the circumferential notch 22a.

Therefore, the notch 15 of the sliding body 14 and the locking latch 19 of the locking lever 18 are engaged at an angle with respect to the axis of the sliding body 14, and the component force of the spring 16 acting along the inclined slope Therefore, the rotor 2 prevents the locking lever 18 from constantly trying to rotate about the pivot shaft 21.
If the rotor 22 and the locking lever 18 are now disengaged, the locking lever 18 will spring up as shown by the chain line in FIG. Release the lock and remove it. Thus strong spring 1
6, the sliding body 14 pushes against the valve rod 8, and the operating valve A is opened.

Next, in the case of the embodiment shown in FIG. 3, in this case as well, the effect is exactly the same as above, and when the sliding body 14 jumps rearward with strong force due to the elasticity of the spring 16, it hits the fuze 12a of the valve housing 12, and the special The gunpowder explodes, and the heat of the explosion turns the sodium azide into nitrogen gas, instantly inflating the air bag.

(Effect of the invention) Since this invention was constructed as described above, the pendulum 2
7 continues to vibrate periodically within the allowable amplitude during normal times,
The rotor 22 is rotated rapidly by shaking greatly only when an abnormal accident such as a collision occurs.Using the extremely simple principle of pendulum action, it automatically and sharply transmits an abnormal signal such as a car collision. The reliable rotation of the rotor 22, which responds quickly in response to this, enables stable, safe and positive unlatching, and has the excellent effect of guaranteeing safe and reliable valve opening.

In addition, the rotor 22 always senses the magnitude of the impact from a reference plane, which is a vertical plane passing through the axis of the rotor 22.
The locking lever 18 serves to selectively transmit an abnormal impact signal to the latch portion, and the locking lever 18 faithfully follows the movement of the rotor 22 to ensure reliable valve opening.

Additionally, since this device does not use artificial sources such as electricity or fluid pressure as a power source, situations such as inoperation due to battery discharge, wire breakage due to collision, or inoperation due to poor contact are avoided, making it safe. It has extremely high performance and is advantageous in terms of maintenance.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is a partially longitudinal side view, Fig. 2 is a perspective view of the main part of the tip, and Fig. 3 is a longitudinal cross-section of the sliding body operating section of another embodiment. It is a front view. 1...Valve housing, 2...Valve chamber, 3...Inflow port, 4...
... Outlet, 5 ... Valve seat, 6 ... Ball valve, 7 ... Communication part, 8 ... Valve rod, 9 ... Protrusion head, 10 ... O-ring, 11 ... High pressure gas container, 12 ... ...Benkyo, 12
a...Fuse, 13...Sheath tube, 13a...Inner tsuba, 1
3b... Notch, 14... Sliding body, 15... Notch, 16... Spring, 17... Support frame, 17a... Yoke part, 17b... Front flange part, 18... Locking lever, 19... ...Locking latch, 20... Trochanter, 2
DESCRIPTION OF SYMBOLS 1... Pivot, 22... Rotor, 22a... Circumferential notch, 23... Support shaft, 24... Projection rod, 25... Rotating disk, 26... Arm rod, 27... Pendulum, 28... …
Weight, A...operating valve.

Claims (1)

[Scope of utility model registration request] A spring 16 is interposed in a sheath pipe 13 connected to the operating valve A, and a sliding body 14 is fitted therein, and a locking lever 18 capable of engaging and disengaging the sliding body 14 is attached to a supporting frame 17 integral with the sheath pipe 13. The locking lever 18 is pivotally mounted and the locking lever 18 when the sliding body 14 is locked is engaged with a rotor 22 having a circumferential notch 22a that controls the insertion and release of the support frame 17,
A latch mechanism for an operating valve for an air bag device, which has a pendulum 27 suspended for rotating the rotor 22.