Fuel supplying device of igniter

Abstract

A fuel supplying device of igniter includes a fuel chamber with an outlet, a gas discharge section, a buffer and a drainage core installed in sequence, wherein an end of the gas discharge section is extended from the outlet for controlling the output of the fuel, the buffer is provided for absorbing the pressure produced by discharging the fuel, and the drainage core has an external pipe disposed around the periphery of the drainage core, such that only a portion of the drainage core that has its back facing the buffer is exposed in order to reduce the fuel incoming area of the drainage core. Thus, the pressure of the fuel passing through the drainage core and buffer is reduced, so that when the fuel is lighted up, there will not be any danger due to the high pressure of the fuel.

1 . A fuel supplying device of igniter, comprising: 
 a fuel chamber, containing a high-pressure fuel and having an outlet at an end of said fuel chamber;    a gas discharge section, having an end disposed at said outlet and the other end extended out from said the outlet, for controlling the output of a fuel; a buffer, installed between said gas discharge section and said fuel chamber for absorbing the pressure of said fuel when discharging said fuel;    a drainage core, installed in said fuel chamber at an end of said gas discharge section with its back facing said buffer; and    an external pipe, disposed on a portion of the periphery of said drainage core for reducing the fuel incoming area of said drainage core and forcing said fuel to come in from a portion of said drainage core unwrapped by said external pipe for reducing the pressure of said fuel when being discharged.    
   
   
       2 . The device of  claim 1 , wherein said drainage core is made of a foam material and a plurality of pores are disposed on the surface of said drainage core.  
   
   
       3 . The device of  claim 1 , wherein said external pipe wraps around said drainage core, and exposes a portion of said drainage core that is far from said buffer for forcing said fuel coming in from an unwrapped portion of said drainage core.  
   
   
       4 . The device of  claim 1 , wherein said external pipe is a durable, pressure-resisting metal pipe.  
   
   
       5 . The device of  claim 3 , wherein said external pipe wraps around said drainage core, and the optimal length of said external pipe is equal to ⅓˜ 9/10 of the length of said drainage core.  
   
   
       6 . The device of  claim 2 , wherein said drainage core includes an external sleeve sheathing the external periphery of an end facing said buffer, and said external sleeve includes a plurality of gas outlets disposed at an end proximate to said buffer.  
   
   
       7 . The device of  claim 6 , wherein said external pipe with its end proximate to said buffer is coupled with said external sleeve.  
   
   
       8 . The device of  claim 6 , wherein said external sleeve is coupled integrally with said external pipe.  
   
   
       9 . The device of  claim 1 , wherein said buffer comprises: 
 a foam, disposed at an end with its back facing said drainage core for reducing the pressure of said fuel when being discharged; and    a pin member, disposed between said foam and said drainage core, and one part of said pin member passes through said foam and is exposed from the surface of said foam.    
   
   
       10 . The device of  claim 1 , wherein said gas discharge section comprises: 
 a control valve, disposed at a position facing said buffer, and having an injection opening disposed on said control valve at an end facing said buffer, and a second opening disposed at another end;    an adjusting member, disposed at a position facing said control valve, and having a hole disposed at one end of said adjusting member and a first opening disposed at the other end, such that a portion of said control valve is accommodated in said first opening; and    a gas discharge pin, being in a hollow form and having an end extended from said hole out of said adjusting member, and the other end extended from said first opening into said second opening.    
   
   
       11 . The device of  claim 10 , wherein said gas discharge pin includes a first protruded ring, a second protruded ring and a third protruded ring installed in sequence from said hole to said injection opening, and said gas discharge pin includes a plastic pad disposed at an end proximate to said third protruded ring for prevent said fuel permeating from the gap between said injection openings, and said gas discharge pin includes a gas incoming hole disposed between said plastic pad and said third protruded ring, such that said fuel passes through said gas incoming hole and out from an end of said gas discharge pin, and said gas discharge pin includes a first plastic washer disposed at an end proximate to said second protruded ring for preventing said fuel permeating from the gap around the position where said gas discharge pin is inserted into said adjusting member.  
   
   
       12 . The device of  claim 11 , wherein said second protruded ring is slightly larger than said hole, so that said gas discharge pin is not separated from said adjusting member.  
   
   
       13 . The device of  claim 11 , wherein said gas discharge pin includes a resilient member disposed between said second protruded ring and said third protruded ring, such that after said gas discharge pin is pushed outward by an external force, the resilience of said resilient member resumes the original position of said gas discharge pin.  
   
   
       14 . The device of  claim 10 , wherein said control valve accommodates a portion of said gas discharge pin when coupling with said adjusting member.  
   
   
       15 . The device of  claim 11 , wherein said control valve includes a second plastic washer disposed at the periphery of an end proximate to said injection opening for preventing said fuel permeating from the gap between said buffers.  
   
   
       16 . The device of  claim 10 , wherein said adjusting member includes a thread section disposed around its periphery, and said thread section is coupled with another thread section disposed in said outlet, and the degree of tightness between said thread section and said another thread section controls the level of tightness between said control valve and said buffer.  
   
   
       17 . The device of  claim 10 , wherein said gas discharge section includes a transversal rod disposed at said outlet, and said gas discharge pin penetrates an end of said transversal rod, so that said transversal rod is latched against said first protruded ring of said gas discharge pin, and said transversal rod drives said plastic pad to shift and said fuel is sent into said gas discharge section.  
   
   
       18 . The device of  claim 16 , wherein said adjusting member is rotated in a direction, and said gas discharge section is coupled with buffer to a certain level of tightness so as to reduce the content of said fuel.  
   
   
       19 . The device of  claim 16 , wherein said adjusting member is rotated in another direction, and said gas discharge section is released from said buffer to a certain level of tightness so as to increase the content of said fuel.  
   
   
       20 . The device of  claim 1 , wherein said fuel chamber includes an incoming gas sleeve disposed on the other end, and said incoming gas sleeve refills said fuel into said fuel chamber, such that said fuel chamber can be reused.