Igniter and gas generator having the same

Abstract

Provided is a squib for attaining a normal ignition of gas generants even when an adhesion state of the plug with enhancers is released by vibration or impact and a gas generator having the squib. A squib including a plug 13 , two or more electrode pins 14 which pass through the plug 13 and respectively provided with a head 25 , a bridge wire 16 connecting spaces between the respective heads 25 on at least two electrode pins 14 among the electrode pins 14 , and ignition charge 10 which are ignited by the bridge wire 16 electrified via the electrode pins 14 , wherein the plug 13 is a cured composition of thermosetting resins, the electrode pin 14 in which the bridge wire 16 is connected to the head 25 passes through the plug 13 , with a predetermined distance A kept between the head 25 and the plug 13 , and at least the head 25 and the bridge wire 16 are enclosed by the ignition charge 10 , which is a solid, and fixed to the plug 13.

1 . A squib comprising a plug ( 13 ), two or more electrode pins ( 14 ) which pass through the plug ( 13 ) and respectively provided with a head ( 25 ), a bridge wire ( 16 ) connecting spaces between the respective heads ( 25 ) of at least two electrode pins ( 14 ) among the electrode pins ( 14 ) and enhancers ( 10 ) which are ignited by the bridge wire ( 16 ) electrified via the electrode pins ( 14 ), wherein 
 the plug ( 13 ) is a cured composition of thermosetting resins,    the electrode pin ( 14 ) in which the bridge wire ( 16 ) is connected to the head ( 25 ) passes through the plug ( 13 ), with a predetermined distance (A) kept between the head ( 25 ) and the plug ( 13 ), and at least the head ( 25 ) and the bridge wire ( 16 ) are enclosed by the enhancers ( 10 ), which is a solid, and fixed to the plug ( 13 ).    
     
     
         2 . The squib as set forth in  claim 1  wherein the top of the head ( 25 ) of the electrode pin ( 14 ) connected to the bridge wire ( 16 ) is provided with a flat surface ( 25   a  ) traversing an axial center.  
     
     
         3 . The squib as set forth in  claim 1  wherein a predetermined distance (A) between the head ( 25 ) and the plug ( 13 ) is in the range from 0.1 mm to 2.0 mm.  
     
     
         4 . The squib as set forth in  claim 1  wherein the enhancers ( 10 ) are one solid body and a coating layer ( 30 ) is provided on the surface of the solid body.  
     
     
         5 . The squib as set forth in  claim 4  wherein the coating layer ( 30 ) is formed with a material containing at least any one of materials selected from silicon resin, fluorine resin, acrylic resin and epoxy resin.  
     
     
         6 . The squib as set forth in  claim 4  wherein the thickness (E) of the coating layer ( 30 ) is in the range from 0.1 mm to 3.0 mm.  
     
     
         7 . The squib as set forth in  claim 1  wherein the composition of thermosetting resins is an epoxy resin composition.  
     
     
         8 . A gas generator having the squib ( 4 ) described in  claim 1.