Pyrotechnic ignition pill and method for manufacturing a pyrotechnic ignition pill

Abstract

A pyrotechnic ignition pill with a housing, an ignition pill charge housed in the housing, at least two terminal contacts connected to the ignition charge, wherein the terminal contacts are guided out of the housing through a glass bushing, characterized in that the terminal contacts in the region of the ignition charge have a round cross-sectional profile and that the terminal contacts outside the housing have an angular cross-sectional profile.

Claims

1. Pyrotechnic ignition pill with a housing, an ignition charge housed in the housing, at least two terminal contacts connected to the ignition charge, wherein the terminal contacts are guided out of the housing through at least one glass bushing, wherein the terminal contacts in the region of the ignition charge have a round cross-sectional profile and the terminal contacts outside the housing have an angular cross-sectional profile such that the terminal contacts with angular cross-sectional profile are adapted for connector geometries which are designed for angular connection pins.

2. Pyrotechnic ignition pill according to claim 1, wherein the terminal contacts are formed from round wires and are plastically deformed outside the housing.

3. Pyrotechnic ignition pill according to claim 1, wherein the terminal contacts have a first contact spacing in the region of the glass bushing and have a second contact spacing outside the housing which is greater than the first contact spacing.

4. Pyrotechnic ignition pill according to claim 1, wherein the terminal contacts in the glass bushing run straight and parallel to one another and run at an angle to one another outside the glass bushing in a central section and run parallel to one another in an end section.

5. Pyrotechnic ignition pill according to claim 1, wherein the terminal contacts are guided through two glass bushings facing each other.

6. Pyrotechnic ignition pill according to claim 1, wherein the terminal contacts outside the glass bushing are bent facing away from one another.

7. Pyrotechnic ignition pill according to claim 6, wherein the bend begins at a distance of at least the radius of the terminal contact from the glass bushing.

8. Pyrotechnic ignition pill according to claim 1, wherein the glass bushing has a glass pill and a support ring, a cover of the housing is arranged on the support ring in a material bond, and the ignition charge is arranged in the interior of the cover.

9. Pyrotechnic ignition pill according to claim 1, wherein the terminal contacts are guided in a connector housing on the side of the glass bushing opposite the ignition charge.

10. Pyrotechnic ignition pill according to claim 9, wherein the connector housing is made of a plastic, in particular injection-moulded, and/or the terminal contacts are bent inside the connector housing.

11. Pyrotechnic ignition pill according to claim 9, wherein the connector housing is formed onto the support ring and the glass bushing.

12. Pyrotechnic ignition pill according to claim 1, wherein the angular cross-sectional profile is formed by two longitudinal edges running parallel to one another and two transverse edges opposing one another, wherein the transverse edges are formed in an arcuate shape, in particular in a convex arcuate shape.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following, the subject matter is explained in more detail with reference to drawings showing exemplary embodiments. The drawings show:

(2) FIG. 1a, b a longitudinal section through a pyrotechnic ignition pill according to a first embodiment;

(3) FIG. 2a, b a pyrotechnic ignition pill according to a further embodiment;

(4) FIG. 3a, b cross-sections through terminal contacts;

(5) FIG. 4 a view of a pyrotechnic ignition pill;

(6) FIG. 5 a sequence of a method according to the subject matter.

DETAILED DESCRIPTION OF SPECIFIC EMBODIMENTS

(7) FIG. 1a shows a pyrotechnic ignition pill 2 in a side view. The pyrotechnic ignition pill 2 has a housing 4 and a connector housing 6. Terminal contacts 8 are led out of the housing 4 and the connector housing 6. A pyrotechnic ignition charge is enclosed in the housing 4. The connector housing 6 accommodates the terminal contacts 8 led out of the housing 4 and guides them to the outside, as shown in more detail in FIG. 1b.

(8) In FIG. 1b, the housing 4 is shown in a sectional view. The housing 4 comprises a two-layer cover formed by an outer insulation layer 4a and an inner metal layer 4b. Inside the lid 4a, 4b there is an ignition charge 10, which may also be formed of an ignition charge 10a and a propellant charge 10b. The metallic layer 4b of the lid 4a, 4b is circumferentially welded to a ring 12. The ring 12 receives a glass bushing 14. In the glass bushing 14, two terminal contacts 8 are guided so as to run parallel to one another.

(9) To manufacture the housing 4 including the the ignition charge 10, a ring 12 is first fitted with a glass pill. The terminal contacts 8 are pushed through the glass pill.

(10) The glass of the glass pill is melted and nestles against the terminal contacts 8 inside the ring 12, forming a gas-tight connection. On the inside of the housing 4, the terminal contacts 8 are electrically short-circuited to each other via an ignition wire. The ignition wire runs through the ignition charge 10, in particular the ignition charge 10a.

(11) The cover 4a, 4b is placed on the ignition charge 10, in particular initially with the metal layer 4b. The metal layer 4b is circumferentially welded, for example laser welded, to the ring 12. Subsequently, the insulation layer 4a is positioned and the connector housing 6 is overmolded around the “naked” igniter. The igniter is now ready for use. By the cover 4b and the glass bushing 14, the igniter charge 10 is hermetically shielded and is thus enclosed gas-tight and/or moisture-tight from the environment.

(12) For further use, a connector housing 6 is molded onto the housing 4, for example by means of injection molding.

(13) It can be seen in FIG. 1b that the terminal contacts 8 run parallel to one another within the glass bushing 14. On the side of the glass bushing 14 opposite the ignition charge 10, the terminal contacts 8 are bent apart, but again run parallel to each other outside the connector housing 6.

(14) FIGS. 2a, b show essentially the same elements, although the connector housing 6 as shown in FIG. 2b is provided with an O-ring 6a to enable it to be inserted into a socket in a moisture-tight manner if necessary.

(15) In contrast to FIG. 2a, in FIG. 2b the bending of the terminal contacts 8 is discontinuous, so that the terminal contacts 8 are diverging in a V-shaped, angular manner.

(16) The ignition pill 2 is fixed to the terminal contact 8 before or after the connector housing 6 has been injection moulded. In this process, the terminal contacts 8 can be fixed directly above the glass bushing 14 by grippers. Subsequently, pressing tools can press the end regions of the terminal contacts 8 that are outside the connector housing 6 in the finished product so that cross-sectional profiles are formed as shown in FIGS. 3a, b.

(17) FIG. 3a shows the cross-sectional profile of the terminal contacts 8 inside the glass bushing 14. It can be seen that the terminal contacts 8 are round. This in particular results from the use of connecting wires for the terminal contacts 8.

(18) By pressing, the terminal contacts 8 are brought into an angular cross-sectional profile outside the connector housing as shown in FIG. 3b. It can be seen that two opposing side edges 8a run parallel to each other, respectively. The short edges can also run parallel to each other, but can also be convex. In FIG. 3b, it can be seen that the terminal contacts 8 have a certain ovality in their cross-sectional profile, which is also to be understood by angular according to the subject matter.

(19) FIG. 4 shows the ignition pill 2 in a view. It can be seen that the terminal contacts 8 are formed as flat parts outside the connector housing 6. This is done by pressing the terminal contacts 8 with the aid of pressing tools.

(20) FIG. 5 shows the sequence of a method according to the subject matter. First, a ignition pill 2 is made available (20). Subsequently (22), the priming pill 2 is fixed with gripper arms, for example by fixing the terminal contacts 8 directly at the exit out of the glass bushing 14. After the terminal contacts have been fixed, an end region of the respective terminal contacts 8 is pressed (24) with a pressing tool. The pressing tool can have lateral limiting sliders so that the terminal contacts 8 have a defined width after pressing.

(21) After step 24 or before step 24, a bending of the terminal contacts 8 outwards can be carried out in a step 26, as shown in FIGS. 1b and 2b.

(22) Subsequently, an injection molding of a connector housing 6 can be performed in step 28.

LIST OF REFERENCE SIGNS

(23) 2 Firing pellet 4 Housing 6 Connector housing 8 Terminal contacts 10 Ignition charge 12 Ring 14 Glass bushing 16 Ignition wire 20 Provision 22 Fixing 24 Pressing 26 Spreading 28 Overmolding