Pyrotechnic device with riveted housing
A pyrotechnic switch comprises a housing formed by a first housing part and a second housing part, at least one rivet by means of which the first housing part is riveted onto the second housing part in order to form the housing, and at least one pyrotechnic actuator arranged in the housing. Further, at least one of the first housing part or the second housing part comprises a metal insert and a plastic body overmolded onto the metal insert, and the metal insert comprises a passage opening for the rivet such that the rivet is in contact with the passage opening of the metal insert.
1. A pyrotechnic switch, comprising:
a housing, formed by a first housing part and a second housing part;
at least one rivet by means of which the first housing part is riveted with the second housing part in order to form the housing;
at least one pyrotechnic actuator arranged in the housing;
wherein:
at least one out of the first housing part or the second housing part comprises a metal insert and a plastic body overmolded onto the metal insert,
the metal insert comprises a passage opening for the at least one rivet, and
the at least one rivet is in contact with the passage opening of the metal insert.
2. The pyrotechnic switch according to claim 1 , wherein the rivet is in contact with a side wall of the passage opening.
3. The pyrotechnic switch according to claim 1 , wherein an entire periphery of the rivet is in contact with a side wall of the passage opening.
4. The pyrotechnic switch according to claim 1 , wherein the rivet comprises, opposite from a contact area with the passage opening, a base with a shoulder perpendicular to an axial direction of the rivet, in order to form a support for the other of the first housing part or the second housing part.
5. The pyrotechnic switch according to claim 1 , wherein the rivet is free from all contact with the plastic body of said at least one out of the first housing part or the second housing part comprising the metal insert with the passage opening in contact with the rivet, in an area of the housing located between the metal insert and a base.
6. The pyrotechnic switch according to claim 1 , wherein, at the level of the passage opening, the metal insert presents a passage having a size less than a passage of said at least one out of the first housing part or the second housing part comprising the metal insert.
7. The pyrotechnic switch according to claim 1 , wherein the metal insert comprises a plurality of overmolding openings, so as to enable an overmolding of the plastic body of the two sides of the metal insert, and a continuity of material of the plastic body through the overmolding openings.
8. The pyrotechnic switch according to claim 1 , wherein an area of the rivet in contact with the passage opening, is deformed by a crimping operation at the time of the assembly of the pyrotechnic switch.
9. The pyrotechnic switch according to claim 1 , wherein the other, of said at least one out of the first housing part or the second housing part comprising the metal insert with the passage opening in contact with the rivet, is only in contact with the rivet via an electrically insulating material, such as a plastic material.
10. The pyrotechnic switch according to claim 1 , comprising an electrical conductor passing through the housing and arranged between the first housing part and the second housing part.
11. The pyrotechnic switch according to claim 1 in combination with an automotive vehicle.
12. The pyrotechnic switch according to claim 1 , wherein the other, of said at least one out of the first housing part or the second housing part comprising the metal insert with the passage opening in contact with the rivet, presents another passage opening for the rivet, and is free from the metal insert at a level of an other passage opening.
13. The pyrotechnic switch according to claim 12 , wherein the other passage opening presents a passage cross section greater than a passage cross section of the metal insert.
14. A method of making a pyrotechnic switch according to claim 1 , comprising the steps of:
positioning the first housing part with the second housing part,
passing a free end of the rivet through the passage opening,
deforming, through a crimping operation, the free end, so as to make the rivet contact the passage opening, on an entire periphery thereof.
15. The method of making the same according to claim 14 , wherein the step of deforming the free end is long in order to radially deform the free end at a level of the passage opening, and sufficiently short in order to not radially deform the base of the rivet located opposite from the free end and facing an other passage opening.