HIGH PERFORMANCE INITIATOR

Description

Field of the Invention

[0001] The invention relates to a compact the high performance initiator for high loading of pyrotechnic material or other energetic materials which use separate sealed inner container for very sensitive primary pyrotechnic material and hermetically separated outer container for very high load of booster pyrotechnic material. It is intended to ensure the function of various security systems, especially in automotive safety systems.

Background of the Art

[0002] Currently there are advantageously used pyrotechnic initiators in the automotive industry or in other related industries for some applications.

[0003] Increasing demands on the ignition performance of pyrotechnic initiators, trends of simplifying products for automotive safety systems and operations and also their manufacturing processes cause that it is essential to insert higher amount of different energetic materials into these elements.

[0004] The initiator according to the US patent 5 140 906 can contain higher amount of different energetic materials. However, it is rather complicated, it contains many parts, many technological steps being necessary to its production. Therefore it is costly, primarily thanks to using two headers - inner header and outer header. These headers are connected each to other by two glass seals - inner seal and outer seal. Moreover, the said inner header and outer header are separated each from other through circular ceramic washer.

[0005] The inner plastic liner does not assure the hermetic tightness of the whole as the moisture penetration through radial output holes is allowed. The embodiment with connected cables does not assure the hermetic separation of the initiator charge from the output charge which can lead to the moisture penetration from the output charge into the initiator charge, possibly to the chemical interaction of these materials.

[0006] The described and depicted assembly is voluminous which complicates its putting on standard automotive systems where standard shapes of the initiator body are required.

[0007] In reality, it is for standard well known designs of initiators currently solved by increasing length of a metal container into which the larger amount of pyrotechnic materials are filled. These booster pyrotechnic materials adversely affect sensitive primary pyrotechnic material due to its chemical composition, content of volatile substances and moisture. These negative impacts could lead to degradation of the product or in the worst case to the failure of the initiator. It means that the possibilities of increasing the performance of pyrotechnic initiators through a simple increase of the pyrotechnic materials amount are limited and they are practically already exhausted.

Summary of the Invention

[0008] The disadvantages and imperfections of the known high performance initiators, designated especially for the automotive industry, largely eliminates high performance initiator for high loading of pyrotechnic material or other energetic materials consisting of electrical contacts and contiguous closed space containing primary pyrotechnic material and booster pyrotechnic material according to invention. Nature of the invention consists in the fact that the initiator which contains the holder of contacts, which towards inside the initiator has reduced diameter of the holder, where the inner container is placed which contains primary pyrotechnic material and over the circumference is sealed with reduced diameter of holder, over the inner container outer container is inserted, and such initiator has that the outer container which contains booster pyrotechnic material on its inner edge is adjacent to the holder of contacts with which it is sealed around the circumference, while the area of the holder of contacts with the adjacent edge of the outer container is integrated into the plastic body which carries also contacts at the same time, wherein the circumference connection of the inner container with the reduced diameter of the holder and/or circumference connection of the outer container with the holder of contacts is hermetic and is performed by first and/or the second laser weld.

[0009] The volume of the outer container which contains booster pyrotechnic material is advantageously equal to 1 to 200 times the volume of the inner container containing primary pyrotechnic material. The outer container can be surrounded by an insulating cup edges of which are then integrated into the plastic body.

[0010] High performance initiator according to the invention is a compact initiator with arbitrarily large and hermetically separated outer container for very high loading of the booster pyrotechnic material which has hermetically separated sensitive primary pyrotechnic material from other used pyrotechnic materials or other energetic materials.

List of Drawings

[0011] Specific design of the high performance initiator for high loading of pyrotechnic material or other energetic materials according to the invention is shown in the attached drawings in which Fig. 1 represents the initiator in the axial cross-section.

Example

[0012] High performance initiator for high loading of pyrotechnic material or other energetic materials shown in Fig. 1 consists of the holder 1 of contacts, which is put at the reduced diameter 2 of holder and by the first laser weld 10a sealed to the metal inner container 3 containing the primary pyrotechnic material 4 (forms the GTMS subassembly), on the place of the holder 1 of contacts is the metal outer container 5 placed over the inner container 3, the said metal outer container 5 contains the booster pyrotechnic material 6 and by second laser weld 10b for the sealing of outer container 5 is performed with the holder 1 of contacts, and whole thus created subassembly is covered by insulated cover 7 surrounding the outer container 5 and holder 1 of contacts with the edge of the outer container 5 and the insulated cover 7 is surrounded by the plastic body 8, where contacts 9 go through this plastic body 8.

[0013] Purpose of the invention is achieved by adding the second independent metal inner container 3 which contains the primary pyrotechnic material 4. By this solution the primary pyrotechnic material 4 is hermetically separated from the booster pyrotechnic material 6 and, simultaneously, this booster pyrotechnic material 6 as well as primary pyrotechnic material 4 is hermetically separated from the surrounding environment. Thus, it is possible to substantially increase the loading of the booster pyrotechnic material 6 and the total volume of the outer container 5 without negative influence on the primary pyrotechnic material 4, which is protected by the inner container 3. This initiator is used to create high power ignition energy.

Possibility of Industrial Application

[0014] High performance initiator for high loading of pyrotechnic material or other energetic materials according to the invention is applicable primarily in various safety systems, passive safety device of passengers of car or pedestrians, particularly for gas generator for airbags without the need for separate housing of booster pyrotechnic material. In addition, the invention can be used in the construction of automatic fire extinguishing systems for industry and household use.

List of designations:

[0015] 

1 -

holder of contacts

2 -

reduced diameter of holder

3 -

inner container

4 -

primary pyrotechnic material

5 -

outer container

6 -

booster pyrotechnic material

7 -

insulated cover

8 -

plastic body

9 -

contacts

10a, 10b -

first and second laser weld

Claims

1. High performance initiator for high loading of pyrotechnic material or other energetic materials consisting of electrical contacts and contiguous closed space containing primary pyrotechnic material and booster pyrotechnic material, which contains the holder (1) of contacts, which towards inside the initiator has reduced diameter (2) of the holder, where the inner container (3) is placed which contains primary pyrotechnic material (4) and over the circumference is sealed with reduced diameter (2) of holder, over the inner container (3) outer container (5) is inserted, wherein the outer container which contains booster pyrotechnic material (6) on its inner edge is adjacent to the holder (1) of contacts with which it is sealed around the circumference, while the area of the holder (1) of contacts with the adjacent edge of the outer container (5) is integrated into the plastic body (8) which carries also contacts (9) at the same time, wherein the circumference connection of the inner container (3) with the reduced diameter (2) of the holder and/or circumference connection of the outer container (5) with the holder (1) of contacts is hermetic and is performed by first and/or the second laser weld (10a, 10b).

2. High performance initiator for high loading of pyrotechnic material according to the claim 1, characterized by the fact that the volume of the outer container (5) which contains booster pyrotechnic material (6) is equal to 1 to 200 times the volume of the inner container (3) containing primary pyrotechnic material (4).

Ansprüche

1. Der Hochleistungsauslöser für die Hochladung des pyrotechnischen Materials oder anderer energetischen Materialien bestehend aus Elektrokontakten und zusammengehörenden geschlossenen Räumen enthaltend pyrotechnisches Ausgangsmaterial und pyrotechnisches Zündungs/Booster-Material, das die Kontakthalter (1) beinhaltet, die in der Richtung des inneren Auslösers den reduzierten Durchmesser (2) des Halters reduzieren, wo der Innenbehälter (3) angebracht ist, der das pyrotechnisches Ausgangsmaterial (4) enthält und ist abgedichtet über den Kreisumfang mit dem reduzierten Durchmesser (2) des Halters, auf den Innenbehälter (3) ist der Außenbehälter (5) eingesetzt, worin der Außenbehälter (5), der das pyrotechnische Zündungs/Booster-Material (6) enthält und grenzt an die innere Kante des Kontakthalters (1), mit dem sie rund um den Kreisumfang abgedichtet ist, während der Bereich des Kontakthalters (1) mit der angrenzenden Kante des Außenbehälters (5) in die plastische Einheit (8) integriert ist, die auch in der gleichen Zeit die Kontakte (9) trägt, worin die Verbindung des Umfanges vom Innenbehälter (3) mit dem reduzierten Durchmesser (2) des Halters und/oder der Verbindung des Kreisumfanges vom Außenbehälter (5) mit dem Kontakthalter (1) hermetisch ist und wird mit dem ersten und/oder dem zweiten Laserschweißnaht (10a, 10b) durchgeführt.

2. Der Hochleistungsauslöser für die Hochladung des pyrotechnischen Materials gemäß dem Anspruch 1, worin das Volumen des Außenbehälters (5), der das pyrotechnische Zündungs/Booster-Material (6) beinhaltet, ist gleich von 1 bis 200 mal dem Volumen des Innenbehälters (3), der das pyrotechnische Ausgangsmaterial (4) enthält.

Revendications

1. Initiateur hautement performant pour charge élevée de matériau pyrotechnique ou d'autres matériaux énergétiques contenant des contacts électriques et un espace fermé adjacent contenant un matériau pyrotechnique primaire et un matériau pyrotechnique secondaire, comportant un porte-contacts (1), ayant vers l'intérieur de l'initiateur un diamètre réduit (2) du porte-contacts, où est placé un récipient interne (3), contenant le matériau pyrotechnique primaire (4) et étant fermé sur son pourtour par le diamètre réduit (2) du porte-contacts, un récipient externe (5) étant inséré à travers le récipient interne (3), où le récipient externe (5) comporte un matériau pyrotechnique secondaire (6) et étant adjacent sur le bord interne au porte-contacts (1), avec lequel il est fermé sur le pourtour, tandis que la zone du porte-contacts (1) avec bord adjacent du récipient externe (5) est intégrée dans un corps en plastique (8), tenant également les contacts (9) dans le même temps, où le joint circonférentiel du récipient interne (3) avec diamètre réduit (2) du porte-contacts et/ou le joint circonférentiel du récipient externe (5) avec porte-contacts (1) est hermétique et réalisé par une première et/ou deuxième soudure laser (10a, 10b).

2. Initiateur hautement performant pour charge élevée de matériau pyrotechnique selon la revendication 1, où le volume du récipient externe (5), contenant le matériau pyrotechnique secondaire (6), est égal à 1 à 200 fois le volume du récipient interne (3), contenant le matériau pyrotechnique primaire (4).

Drawing