JP2005308339A - Ignitor and gas generator having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ignitor of low cost having an insulating member superior in electrically insulating property, adhesiveness, water resistance, mechanical strength and workability and having superior reliability in ignition. <P>SOLUTION: In this ignitor 11 for a safety device of a vehicle, having ignitor powder, a cup 1 for storing the ignitor powder, a resistor 5, at least two electrode members 2a, 2b for supplying the electric current to the resistor, a conductive base 7 formed in a state of not kept into contact with the electrode members, and an insulating member 3, the ignitor powder, the conductive base and the insulating member are successively stacked in the ignitor powder cup in this order, the insulating member is composed of a thermosetting resin composition, the conductive base is kept into contact with the ignitor powder at its contact face 7a, the electrode member is kept into contact with the ignitor powder at its head part, penetrated through the insulating member without kept into contact with a hole 12, and the electrodes, and the electrodes and the conductive base are insulated from each other by the insulating member. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an igniter used for a gas generator for operating a safety device such as an air bag, a seat belt pretensioner, a pedestrian protection device, and the like, and a gas generator having the igniter.

  Gas generators have recently been increasingly installed, particularly as having the role of operating vehicle safety devices. It is desired to lower the unit price of the entire gas generator so that the unit price of the vehicle does not increase as the mounting rate increases.

  The igniter used for this gas generator has two electrically insulated electrode members, and the two electrode members are connected by a resistor typified by a nickel chrome wire. Then, when the two electrode members receive an electrical signal sent from the vehicle, the resistor generates heat, and the ignition agent is ignited by heating the ignition agent located in the vicinity to the temperature of the ignition point, The combustion energy of the igniting agent is released to the outside of the igniter, which is a starting point for operating the vehicle safety device.

  Conventionally, for example, the igniter disclosed in Patent Document 1 uses two conductive members or conductive members and a metallic eyelet as electrode members, and between two conductive members or between a conductive member and a metal eyelet, It is configured to be insulated by an insulating member made of a thermoplastic resin such as polybutylene terephthalate (PBT) or glass reinforced resin containing glass fiber or the like.

  The igniter disclosed in Patent Document 2 has two hole portions into which two electrode members (lead pins) are inserted, and is fixed by bringing a locking projection of one lead pin into contact with one hole portion. It has an annular plate, and the periphery of the two electrode members (lead pins) is held and insulated by a resin plug formed of a thermoplastic resin such as polyamide resin as an insulating member. It is embedded in a resin plug.

  When glass is used for the insulating member, it usually has a heating step in order to seal between the electrode members. Moreover, when using a thermoplastic resin for an insulating member, a thermoplastic resin is normally shape | molded by processes, such as injection molding, and seals between electrode members. When glass is used as an insulating member for insulation between electrode members, sealing properties and insulating properties are better than when a thermoplastic resin is used.

  Patent Document 3 discloses an igniter in which an insulating member is formed of a thermosetting resin such as unsaturated polyester.

JP 2002-54895 A JP 2001-30868 A JP 2002-90097 A

  However, for example, when glass is filled between electrode members, if the space to be filled is a complicated shape, glass that is solid at room temperature is not suitable for sealing such a shape. As a result, for example, an electrode member having a relatively high cost shape must be used because of a low degree of design freedom with respect to the shape of the electrode member. Moreover, in order to seal between glass and an electrode member, the process heated to the temperature close | similar to melting | fusing point of glass and hold | maintaining for a long time is needed, and this is also one of the high cost factors of an igniter. In addition, when such an igniter having a high unit price is used, there is a problem that the unit price of the entire gas generator is also increased.

  On the other hand, when a thermoplastic resin is used as an insulating member for the insulation between the electrode members, the thermoplastic resin is excellent in workability and shape freedom as compared with glass, but is repeatedly subjected to temperature changes or under high temperature conditions. In this case, it is difficult to maintain the sealing property between two electrode members or conductive members and electrode members such as metal eyelets over a long period of time. As a result, external moisture and the like enter the igniting agent located inside the igniter. In addition, the ignition performance of the igniting agent may be adversely affected, and thus the ignition reliability may be lowered.

  In addition, when the insulating member is formed of an unsaturated polyester composition, it takes a relatively long time to be completely cured, resulting in poor productivity, or when a peroxide is used as a reaction initiator. The problem is that the oxide is unstable and is easily decomposed, resulting in poor workability.

  The present invention has been made in view of the above problems, and the object thereof is to provide ignition reliability having an insulating member excellent in electrical insulation, adhesiveness, water resistance, mechanical strength, and workability. It is to provide an excellent low cost igniter.

Means and effects for solving the problems

  The igniter according to the present invention includes at least 2 for supplying a current to the resistor by being connected directly or indirectly to the resistor, an igniter cup containing the igniter, a resistor, and a resistor. A conductive base having at least one hole into which at least one electrode member formed so that at least one electrode member is not in contact with the electrode member, and an insulating member; The igniter is ignited to operate the vehicle safety device by supplying the igniter, and the igniter, the conductive base and the insulating member are stacked in this order in the igniter cup. The insulating member is formed of a thermosetting resin composition, the conductive base is in contact with the ignition agent at a contact surface, and the head of the at least one electrode member is in contact with the ignition agent, It extends through the insulating member without contacting, the between the electrode member and the other electrode member and said conductive base is insulated by the insulating member.

  According to the igniter configured as described above, the electrode members are fixed and the electrode members are insulated from each other only by filling and curing the thermosetting resin composition once in the holes and the columnar spaces of the conductive base. In addition, the sealing performance between the electrode members can be simultaneously maintained. Moreover, since the thermosetting resin composition is used, the time and cost for the heat treatment can be reduced as compared with the conventional glass. Furthermore, not only the hole into which the electrode member is inserted, but also the columnar space from which the electrode member protrudes is filled with an insulating member formed from a thermosetting resin composition in succession to the hole. The member does not fall out of the predetermined position.

In this way, the insulating member that insulates between the electrode members is changed from a material such as thermoplastic resin or glass, and from a thermosetting resin composition having good electrode holding properties, sealing properties, insulating properties, workability, and shape freedom. By being formed, it is possible to provide a low-cost igniter with excellent ignition reliability.
In such an igniter of the present invention, when a current is supplied to the resistor, the igniting agent is ignited to operate the vehicle safety device.

  Further, in the igniter according to the present invention, the at least two electrode members are electrically connected to the first lead pin inserted into the hole of the conductive base, and the back surface of the contact surface between the conductive base and the ignition agent. A second lead pin joined to a conductive base, the conductive base is energizable, and the resistor is joined to the conductive base and the first lead pin joined to the second lead pin, Is a resistor to be supplied.

  According to the igniter configured as described above, the conductive base is joined to the second lead pin. Since the first lead pin and the second lead pin joined to the conductive base are connected to the power source, it is possible to easily and reliably energize the resistor.

  In such an igniter of the present invention, when a current is supplied to the resistor, the igniting agent is ignited to operate the vehicle safety device.

Further, in the igniter of the present invention, the relationship between the minimum diameter A of the hole provided in the conductive base and the thickness B of the conductive base in the depth direction of the hole is:
0.9 × B <A
It has been adjusted to be.

  According to the igniter having the above-described configuration, the thermosetting resin composition for forming the insulating member in the hole of the conductive base in which the conductive base can be defined in an optimum shape condition and the electrode member is inserted. It becomes easy to fill things.

  Moreover, the igniter of the present invention has a cup shape in which the inside of the conductive base forms a columnar space, and the internal space includes at least a part of the insulating member, the first lead pin, and the second lead pin. .

  According to the igniter having the above-described configuration, the thermosetting resin composition for forming the insulating member in the columnar space can be easily filled. Further, since the degree of freedom increases at the joint portion between the conductive base and the igniter cup, the joint is also facilitated.

  In the igniter of the present invention, the hole of the conductive base has an inner diameter portion having a different size, and a portion inserted into the hole of the first lead pin has an outer diameter portion having a different size. And the minimum diameter A of the said hole of the said electroconductive base is smaller than the largest outer diameter part of the part inserted in the said hole of the said electrode member.

  According to the igniter having the above-described configuration, the electrode member is unlikely to come off from the igniting agent storage space side to the columnar space side where no igniting agent is stored, with the conductive base as a boundary. In the unlikely event, scattering of the electrode member to the outside can be prevented.

  In the igniter of the present invention, the thermosetting resin composition forming the insulating member contains an epoxy resin, a curing agent, and a curing accelerator.

  According to the igniter having the above configuration, the epoxy resin capable of making various compositions is selected as the thermosetting resin, and accordingly, a curing agent and a curing accelerator are appropriately selected according to the performance required for the insulating member. You can choose. Therefore, an insulating member can be made into the thing excellent in electrical insulation, adhesiveness, water resistance, mechanical strength, and workability | operativity. As a result, it is possible to provide a low-cost igniter with excellent ignition reliability. Moreover, compared with the case where the insulation member is shape | molded with the unsaturated polyester composition, shortening of hardening time is possible and it is excellent in productivity and workability | operativity.

  And the gas generator of this invention is a gas generator which has the said igniter.

  According to the gas generator having the above-described configuration, since an ignition reliability is excellent and a low-cost igniter is used, a gas generator with excellent reliability and a low cost can be provided.

  Hereinafter, embodiments of an igniter and a gas generator having the igniter according to the present invention will be described with reference to the drawings.

[First Embodiment]
The structure of the principal part of the igniter which concerns on 1st Embodiment of this invention is demonstrated based on FIG.1 and FIG.2. 1 is a cross-sectional view of a main part of the igniter 11, and FIG. 2 is a cross-sectional view of the conductive base 7 in the igniter 11 of FIG. In FIG. 1, the igniter 11 includes an igniter cup 1, a lead pin 2 (first lead pin 2 a and second lead pin 2 b), an insulating member 3, an igniter 4, a resistor 5, and a conductive base 7.

  The igniter cup 1 is a bottomed cylindrical cup having an opening 1 a for loading the igniter 4. In the internal space 10, the igniting agent 4, the conductive base 7, the first lead pin 2a, the second lead pin 2b, the insulating member 3 and the resistor 5 are accommodated. The igniting agent 4, the conductive base 7 and the insulating member 3 Laminated in order. The first lead pin 2a is in contact with the igniting agent 4 at its head and passes through the insulating member 3 without contacting the hole 12 of the conductive base 7. Between the first lead pin 2a and the conductive base 7, It is insulated by the insulating member 3. The conductive base 7 is in contact with the igniting agent 4, the contact surface 7 a with the igniting agent 4 is flat, the second lead pin 2 b is joined to the back surface 7 b, and the second lead pin 2 b penetrates the insulating member 3. . The resistor 5 is connected across both the head of the first lead pin 2 a and the contact surface 7 a of the conductive base 7.

  The material of the igniter cup 1 is preferably a metal rigid body such as iron, aluminum or stainless steel.

  The igniting agent 4 is, for example, an explosive composition mainly composed of zirconium, tungsten, and potassium perchlorate as an oxidizing agent, and has a granular shape.

  The igniter of the present invention has no problem as long as there are two or more electrode members, but in the first embodiment, two electrode members are provided. In the present embodiment, one of the two electrode members is the first lead pin 2a. Another one of the electrode members is the second lead pin 2b. The second lead pin 2b is connected to the conductive base 7 which can be energized, and thereby, the conductive base 7 can be easily and reliably energized. As a result, when the first lead pin 2a and the second lead pin 2b are energized, the current is finally supplied to the resistor 5 to generate heat, thereby igniting the igniting agent 4.

  In the present embodiment, the conductive base 7 is a substantially disc having a diameter that is substantially the same as or slightly smaller than the inner diameter of the igniter cup 1. The material of the conductive base 7 is preferably a metal rigid body such as iron, aluminum, and stainless steel that can be energized. In addition, the conductive base 7 may be manufactured by a process such as cutting, but is preferably formed by press molding that can be manufactured at a relatively low cost.

  The conductive base 7 is inserted into the igniter cup 1. The outer peripheral surface of the conductive base 7 and the inner peripheral surface of the igniter cup 1 are in contact with each other. The conductive base 7 and the igniter cup 1 are joined by the welded part 6 by welding from the outer peripheral surface of the side surface of the igniter cup 1 corresponding to this contact part. In addition, the joining method of the igniter cup 1 and the conductive base 7 may be any of soldering, welding, caulking, and adhesion, but preferably welding is preferable, and a form fixed by laser welding is particularly preferable.

  In this way, the conductive base 7 closes the opening 1 a of the igniter cup 1 and seals the igniter 4 in the igniter cup 1. The conductive base 7 divides the internal space 10 of the igniter cup 1 into an igniter storage space 10a and a columnar space 10b in which the igniter 4 is not stored. The conductive base 7 is in contact with the igniting agent 4, the contact surface 7 a with the igniting agent 4 is flat, and the igniting agent storage space 10 a is filled with the igniting agent 4 without a gap. The columnar space 10 b has a larger diameter than the minimum diameter of the hole 12 of the conductive base 7.

  The conductive base 7 has one or more holes 12 into which at least one electrode member for placing the resistor 5 in the space in which the ignition agent 4 is accommodated can be inserted. In the present embodiment, one hole 12 that allows the first lead pin 2a to pass therethrough is provided at a position eccentric from the central axis.

  The first lead pin 2 a is disposed so as to be located on the central axis of the hole 12 provided in the conductive base 7. The first lead pin 2a inserted into the hole 12 of the conductive base 7 penetrates the insulating member 3 and protrudes into the columnar space 10b.

  The second lead pin 2 b is joined to the conductive base 7 at a position eccentric from the center of the conductive base 7. The joining method may be any method such as soldering, welding, and adhesion, but preferably welding is preferred, and resistance welding is particularly preferred. The second lead pin 2b passes through the insulating member 3 and is connected to the conductive base 7 so as to protrude into the columnar space 10b.

  The first lead pin 2a and the second lead pin 2b are each substantially cylindrical. The material of the first lead pin 2a and the second lead pin 2b is preferably a metal rigid body such as iron, nickel iron, and stainless steel that has been subjected to a plating treatment such as nickel plating, galvanization, or gold plating.

  The insulating member 3 is formed from a thermosetting resin composition. The insulating member 3 fills the hole 12 and the columnar space 10b of the conductive base 7 and surrounds at least a part of the first lead pin 2a and the second lead pin 2b which are electrode members. In this way, the insulating member 3 insulates the first lead pin 2a from the conductive base 7 and the second lead pin 2b.

  The resistor 5 is joined to the conductive base 7 and the first lead pin 2a. Specifically, the resistor 5 is joined to the edge of the conductive base 7 that forms the hole 12 of the conductive base 7 and the tip of the first lead pin 2 a so as to straddle the insulating member 3. Examples of the resistor 5 include an electric bridge wire made of a conductive wire material such as a nickel chromium alloy, and a thin film bridge manufactured by a process such as vapor deposition.

  The electrode member and the resistor 5 may be joined by any method such as soldering, welding, or welding, but welding is preferable, and resistance welding is particularly preferable.

  When a thin film bridge is used as the resistor 5, examples of the thin film bridge include a heating resistor, a reactive bridge using a reactive substance, and a shock bridge. These are formed on a ceramic substrate such as an Si substrate or Al 2 O 3 by a known technique such as a LIGA (Lithographie, Galvanoforming, Abforming (microfabrication technology using X-ray)) process or sputtering. The bonding method between the electrode member and the thin film bridge is preferably wire bonding.

  The conductive base 7, the first lead pin 2a, and the second lead pin 2b are all fixed to each other with the insulating member 3 interposed therebetween. The insulating member 3 is also arranged without a gap in the space between the hole 12 of the conductive base 7 in which the first lead pin 2a is inserted and the first lead pin 2a. In addition, the first lead pin 2a and the second lead pin 2b protrude from the columnar space 10b portion filled with the insulating member 3 and protrude to the opposite side of the ignition agent storage space 10a with respect to the conductive base 7. .

In the ignition charge storage space 10 a, the conductive base 7, the insulating member 3, and the first lead pin 2 a have portions that form substantially the same plane 13.
If the resistor 5 is joined to the first lead pin 2a and the conductive base 7 on the same plane 13, the resistor 5 is bridged between the conductive base 7 also serving as an electrode member and the first lead pin 2a. Becomes easy.

  In the present embodiment, the insulating member 3 is preferably arranged in a form that does not have inclusions such as air. In particular, the portion of the insulating member 3 exposed to the side of the igniting agent storage space 10a and the portion forming the same plane 13 is adjusted so that a hole-like portion generated due to the intervention of air or the like does not exist on the surface. It should be.

As shown in FIG. 2, the relationship between the minimum diameter A of the hole 12 provided in the conductive base 7 and the thickness B of the conductive base 7 in the depth direction of the hole 12 is
0.9 × B <A
It has been adjusted to be.

  Thereby, the thermosetting resin composition which can prescribe | regulate the electroconductive base 7 to optimal shape conditions, and forms the insulating member 3 in the hole 12 of the electroconductive base 7 in the state by which the 1st lead pin 2a was penetrated is used. It becomes easy to fill without gaps.

  In the igniter 11 having the above-described structure, when a current is supplied to the resistor 5, the igniter 4 is ignited to operate the vehicle safety device.

  Next, the manufacturing process of the igniter according to the first embodiment will be described with reference to FIGS. 3 to 5.

  FIGS. 3A, 3 </ b> B, and 3 </ b> C are cross-sectional views illustrating a manufacturing process of the igniter assembly intermediate component 59 including the conductive base 7, the first lead pin 2 a, the second lead pin 2 b, and the insulating member 3. . 4 is a cross-sectional view showing an assembly 60 for an igniter including the first lead pin 2a, the second lead pin 2b, the conductive base 7, the resistor 5, the insulating member 3, the igniting agent 4, the igniting agent cup 1, and the squib cover 51. is there. FIG. 5 is a cross-sectional view of the igniter 11 of the present embodiment.

  In FIG. 3A, first, the second lead pin 2b is fixed to a predetermined position on the one surface 7b side of the conductive base 7 by welding. The other surface of the conductive base 7, that is, the contact surface 7a on the side where the second lead pin 2b is not welded, is a flat surface.

  Next, a fixed plate 14 on which a plurality of cylinders 15 having the same inner diameter as the igniter cup 1 are fixed is prepared. The cylinder 15 is fixed to one fixed plate 14 in a plurality of, for example, 5 to 50 ranges. When such a fixing plate 14 is prepared, about 5 to 50 igniter assembly intermediate parts 59 including the conductive base 7, the insulating member 3, the first lead pin 2a, and the second lead pin 2b can be formed at a time. .

  A recess 14 b is provided on the inner surface 14 a of the bottom of the fixed plate 14 surrounded by each cylinder 15. A portion excluding the depression 14b is a flat surface.

  The conductive base 7 is inserted into each cylinder 15 so that the flat contact surface 7 a of the conductive base 7 is in contact with the inner surface 14 a of the bottom of the fixing plate 14. At this time, the recess 14 b is located at the center of the position corresponding to the hole 12 of the conductive base 7. The size of the recess 14b is a size that enables the first lead pin 2a to be fixed at the position when the tip of the first lead pin 2a is inserted.

The first lead pin 2a is inserted into the hole 12 of the conductive base 7, and the tip of the first lead pin 2a is inserted into the recess 14b and fixed. At this time, a space that can be filled with the insulating member 3 is maintained between the side surface of the first lead pin 2 a and the edge portion that forms the hole 12 of the conductive base 7.
The leading end of the first lead pin 2 a is stuck in the fixed plate 14 so as to protrude from the flat contact surface 7 a of the conductive base 7.

  Next, the cup-shaped space 15a formed by the fixing plate 14 and the cylinder 15 and the hole 12 of the conductive base 7 are insulated so as to surround at least a part of the first lead pin 2a and the second lead pin 2b. The thermosetting resin composition forming the member 3 is filled. At this time, the filling amount may be a minimum amount that can maintain the sealing performance and ensure the strength. Usually, it is preferably about 50 to 90% with respect to the depth of the columnar space 10b formed by the conductive base 7.

After the insulating member 3 is filled, it is put in a vacuum chamber, and bubbles present in the insulating member 3 are removed.
Then, it puts into a heating tank, with the fixed plate 14 and the cylinder 15 attached, and is hold | maintained with predetermined temperature and time. The temperature time to be held varies depending on the type of the thermosetting resin that forms the insulating member 3 to be used. In general, about 100 to 200 ° C. so that the thermosetting resin composition is completely cured. Heat at a temperature of. The heating time is usually 0.1 to 10 hours, preferably 0.5 to 7 hours, and more preferably 1 to 4 hours. After the heating and cooling, the assembly intermediate part 59 for the igniter composed of the conductive base 7, the first lead pin 2 a, the second lead pin 2 b, and the insulating member 3 is removed from the fixing plate 14 and the cylindrical body 15. At this time, as shown in FIG. 3B, the thermosetting resin composition forming the insulating member 3 is completely cured, and the conductive base 7, the first lead pin 2a, and the second lead pin 2b are any of them. Also, the insulating member 3 is fixed at a predetermined position, and the hole 12 of the conductive base 7 is sealed.

  Next, as shown in FIG. 3 (c), the portions of the conductive base 7, the insulating member 3, and the protruding first lead pin 2 a that are in contact with the fixed plate 14 are substantially flush with each other. Grind.

  Thus, when the conductive base 7, the insulating member 3, and the first lead pin 2 a have portions that form substantially the same plane 13, the assembly of the igniter assembly 60 described below is facilitated.

  As shown in FIG. 4, the resistor 5 is joined across the insulating member 3 at the edge of the conductive base 7 forming the hole 12 and the tip of the first lead pin 2a. Examples of the method for joining the resistor 5 include soldering and various types of welding, but resistance welding is preferable.

  The igniter cup 1 is appropriately filled with the igniter 4. The igniter assembly intermediate part 59 to which the resistor 5 is joined is inserted into the igniter cup 1 and fixed at a predetermined position. Thereafter, the conductive base 7 and the igniter cup 1 are welded from the outer peripheral surface of the side surface of the igniter cup 1 corresponding to the outer peripheral surface of the conductive base 7.

  The igniter cup 1 is fitted into the squib cover 51 as shown in FIG. The squib cover 51 is a bottomed cylinder having a size capable of closely covering the igniter cup 1. A thin portion 51a is provided at the bottom. The thin part 51a is ruptured by the ignition pressure of the igniter 4 due to ignition and combustion of the igniter 4, and the flame of the igniter 4 is ejected to the outside. The squib cover 51 is made of a thermoplastic resin such as nylon or PBT (polybutylene terephthalate).

  The igniter assembly 60 including the first lead pin 2 a, the second lead pin 2 b, the conductive base 7, the resistor 5, the insulating member 3, the igniting agent 4, the igniting agent cup 1, and the squib cover 51 forms the body 52. Set in a predetermined mold. The mold 52 is filled with a thermoplastic resin to form a body 52 as shown in FIG. In this way, the igniter 11 in which the igniter assembly 60 and the body 52 are integrated is completed.

  According to the assembly 60 for an igniter having the above-described configuration, the electrode member is the first electrode member by simply filling and curing the thermosetting resin composition into the hole 12 and the columnar space 10b of the conductive base 7 once. The lead pin 2a, the second lead pin 2b, and the conductive base 7 also serving as an electrode member can be fixed, and the sealing performance between the electrode members can be simultaneously maintained. Moreover, since the thermosetting resin composition is used, the time and cost for the heat treatment can be reduced as compared with the conventional glass.

  Further, not only in the hole 12 in which the first lead pin 2a is inserted, but also in the columnar space 10b in which the first lead pin 2a and the second lead pin 2b protrude, is formed from the thermosetting resin composition continuously with the hole 12. Since the insulating member 3 thus filled is filled, the first lead pin 2a and the second lead pin 2b do not fall out of a predetermined position.

  As a material of the insulating member 3 that insulates between the electrode members in this way, a thermosetting resin having good electrode holding property, sealing property, insulating property, workability, and shape freedom, instead of a material such as thermoplastic resin or glass. Since the composition is used, it is possible to provide a low-cost igniter having excellent ignition reliability.

  In the above embodiment, the first lead pin 2a and the second lead pin 2b connected to the conductive base 7 are used as the electrode members. However, the electrode member is not limited to these.

  One of the electrode members may be composed of a conductive igniter cup 1 joined to the conductive base 7. In this case, one of the power sources is connected to the igniter cup 1. Further, the second lead pin 2b that is not connected to the conductive base 7 can be employed as one of the electrode members. In this case, one relatively large hole 12 may be provided in the conductive base 7, and both the first lead pin 2a and the second lead pin 2b may be inserted together. Alternatively, two relatively small holes 12 may be provided in the conductive base 7 and the first lead pin 2 a and the second lead pin 2 b may be inserted into the separate holes 12. In any case, the size of the hole 12 of the conductive base 7 needs to be large enough to secure a distance sufficient to maintain an insulating state between the conductive base 7, the first lead pin 2a, and the second lead pin 2b. is there.

  Next, a method of assembling the igniter according to the first embodiment to a gas generator used for a seat belt pretensioner will be described with reference to FIG.

  The igniter 11 is fixed to the igniter holder 56 via the O-ring 53. The igniter holder 56 is a cylindrical body having a hole 56a for fixing the igniter 11 inside. The inner wall has a step portion 56 b for fixing the igniter 11. A first caulking projection 56c protruding in the axial direction for fixing a gas generating agent cup 55 to be described later is fixed to the outermost peripheral portion of one end of the igniter holder 56, and the igniter 11 is fixed to the inside thereof. A second caulking projection 56d is provided to project in the axial direction.

  The first lead pin 2a and the second lead pin 2b protrude to the other end side in the hole 56a of the igniter holder 56 so that the squib cover 51 of the igniter 11 protrudes from one end side of the hole 56a of the igniter holder 56. Thus, the igniter 11 is inserted into the igniter holder 56. The igniter 11 is positioned at a predetermined position of the igniter holder 56 by the step portion 56b. The igniter 11 is fixed to the igniter holder 56 by caulking the second caulking protrusion 56d of the igniter holder 56 in the direction of diameter reduction.

Next, the gas generating agent 54 is appropriately filled in the gas generating agent cup 55.
The opening side end portion of the gas generant cup 55 filled with the gas generant 54 is inserted inside the first caulking projection 56c of the igniter holder 56, and the first caulking projection 56c is caulked in the diameter reducing direction. Thus, the gas generant cup 55 and the igniter holder 56 are fixed to each other. Finally, a shorting clip 57 for preventing malfunction due to static electricity or the like is fitted into the hole 56a from the other end of the igniter holder 56, and the gas generator 41 is completed.

  The operation of the gas generator 41 using the igniter according to the first embodiment will be described with reference to FIG.

  When an electrical signal is sent from a vehicle ignition device (not shown) due to a vehicle collision or the like, electricity flows between the first lead pin 2a and the second lead pin 2b, and the energy is converted from electrical energy to thermal energy by the resistor 5. The The high-temperature resistor 5 ignites the igniter 4 inside the igniter cup 1 by the thermal energy, and the igniter 4 burns rapidly. Due to the combustion of the igniting agent 4, the inside of the igniting agent cup 1 becomes a high temperature and a high pressure. Finally, the bottom part 1b of the igniting agent cup 1 and the thin part 51a of the bottom part of the squib cover 51 are ruptured. It is discharged into the cup 55. The gas generating agent 54 in the gas generating agent cup 55 is ignited and burned by the released high-temperature gas and combustion products, the inside of the gas generating agent cup 55 becomes high temperature and high pressure, and finally, due to the combustion of the gas generating agent 54 A large amount of gas is discharged from the thin portion 58 at the bottom of the gas generating agent cup 55, and a seat belt pretensioner (not shown) is operated.

[Second Embodiment]
The structure of the principal part of the igniter which concerns on 2nd Embodiment of this invention is demonstrated based on FIG.7 and FIG.8. FIG. 7 is a cross-sectional view of a main part of the igniter 21, and FIG. 8 is a cross-sectional view of the conductive base 7 in the igniter 21 of FIG. The same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The configuration of the second embodiment is different from that of the first embodiment in that the conductive base 7 is a bottomed cylindrical cup that can close the opening 1a of the igniter cup 1 as shown in FIG. It is. The inside of the cup-shaped conductive base 7 becomes a columnar space 10b in which the ignition powder 4 is not stored. The internal space includes at least a part of the insulating member 3, the first lead pin 2a, and the second lead pin 2b. Since other points are the same as those of the first embodiment, description thereof is omitted.

  When the conductive base 7 is housed in the igniter cup 1 and closes the opening 1 a, the outer diameter of the conductive base 7 is substantially the same as or slightly smaller than the inner diameter of the igniter cup 1. The conductive base 7 is accommodated in the igniter cup 1 and fixed by a welded portion 6 or the like at a predetermined position. The predetermined position is a position where the ignition charge storage space 10 a is formed in the ignition charge cup 1.

  The effect obtained by the cup-shaped conductive base 7 accommodated in the igniter cup 1 as described above is that the thermosetting resin composition for forming the insulating member 3 can be easily filled. The point which a freedom degree increases to joining locations, such as welding of the explosive cup 1 and the electroconductive base 7, is mentioned.

  Since the conductive base 7 has a cup shape, the inside thereof may be filled with a thermosetting resin composition for forming the insulating member 3. The conductive base 7, the first lead pin 2 a, the second lead pin 2 b, and the insulation The ease of molding of the igniter assembly intermediate part 59 made of the member 3 becomes easier. The cylinder 15 used in the first embodiment is not necessary. Further, since the contact area between the inner surface of the igniter cup 1 and the outer circumferential surface of the conductive base 7 increases, the joining location can be selected more arbitrarily. In particular, when laser welding or the like is selected as the joining method, the internal igniting agent 4 may be ignited during the production due to the heat. Therefore, it is preferable that the igniting agent 4 and the welding site be arranged as far apart as possible. In addition, it is more preferable that the conductive base 7 has a cup shape when joining the igniter cup 1.

  The outer diameter of the conductive base 7 is substantially the same as or slightly larger than the outer diameter of the igniter cup 1, and the conductive base 7 is placed on the opening 1a side end of the igniter cup 1 for welding or the like. It is also possible to close the opening 1a. In this case, all the spaces in the igniter cup 1 can be made into the igniter storage space 10a.

[Third Embodiment]
The structure of the principal part of the igniter 31 which concerns on 3rd Embodiment of this invention is demonstrated based on FIG.9 and FIG.10. The same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The configuration of the third embodiment is different from that of the first and second embodiments in that the hole 12 of the conductive base 7 has an inner diameter portion having a different size and is inserted into the hole 12 of the first lead pin 2a. This is also because the portion has outer diameter portions of different sizes.

  The minimum diameter A of the hole 12 of the conductive base 7 is smaller than the maximum outer diameter portion of the portion inserted into the hole 12 of the first lead pin 2a. As for the diameters of the portions inserted into the holes 12 of the conductive base 7 and the holes 12 of the first lead pins 2a, the diameter of the ignition charge storage space 10a side is larger than the diameter of the columnar space 10b side.

Then, as shown in FIG. 10, the relationship between the minimum diameter A of the hole 12 provided in the conductive base 7 and the thickness B of the conductive base 7 in the depth direction of the hole 12 is
0.9 × B <A
It has been adjusted to be.

  The difference from the first embodiment is that the overall shape of the conductive base 7 is a bottomed cylindrical cup that can close the opening 1a of the igniter cup 1 as in the second embodiment. It is. Since other points are the same as those in the first and second embodiments, description thereof is omitted.

  As an effect obtained by adjusting the inner diameter of the hole 12 of the conductive base 7 and the outer diameter of the first lead pin 2a, for example, when the igniter is ignited by energization, the internal ignition charge 4 is ignited. When the internal pressure is increased or the internal pressure of the device using the igniter is increased, the first lead pin 2a is moved from the igniting agent 4 side to the insulating member 3 side with the conductive base 7 as a boundary. When force is applied in the direction, the first lead pin 2a can be prevented from scattering to the outside. In particular, it can be said that the effect is great when the igniter is exposed to a high temperature under a situation such as a vehicle fire.

  Next, the thermosetting resin composition that forms the insulating member 3 of the igniter of the present invention will be described.

  The thermosetting resin composition is one or two in addition to the thermosetting resin, depending on the required electrical insulation, adhesion, water resistance, mechanical strength, workability and the like required for the insulating member 3. Contains more than seed additives. The thermosetting resin composition preferably contains a thermosetting resin, a curing agent, and a curing accelerator as essential components.

  The insulating member 3 formed of the thermosetting resin composition used in the igniter of the present invention should have a high mechanical strength. For example, conventionally, the tensile strength, bending strength, etc. are generally evaluated. In test items, it can be said that the stronger the strength, the better the characteristics. Moreover, in the said embodiment, since the insulating member 3 was integrally molded with the electroconductive base 7, the 1st lead pin 2a, and the 2nd lead pin 2b with the thermosetting resin composition, tests, such as a thermal shock, were done. Later, there is a gap at the interface where the insulating member 3 made of the thermosetting resin composition is in contact with the conductive base 7 made of a rigid body such as metal, the first lead pin 2a, and the second lead pin 2b. It is not desirable to occur. Therefore, as a physical property of the insulating member 3 formed of the thermosetting resin composition, it is preferable that the linear expansion coefficient is the same for the conductive base 7, the first lead pin 2a, and the second lead pin 2b.

  However, since the linear expansion coefficient of a normal general thermosetting resin is larger than the linear expansion coefficient of a metal, a thermosetting resin composition having a small linear expansion coefficient when molded as the insulating member 3 is obtained. It can be said that it is preferable. Further, it is preferable that the strength is maintained even at a high temperature and the heat distortion temperature is high.

  Examples of the thermosetting resin contained in the thermosetting resin composition that can be used in the present invention include epoxy resins, urethane resins, phenol resins, unsaturated polyester resins, melamine resins, urea resins, alkyd resins, benzoxazine resins, Urea resin etc. are mentioned, but it is excellent in electrical insulation, adhesiveness, water resistance, mechanical strength, workability required for insulating member 3, and make various compositions according to required performance of igniter. Therefore, epoxy resins and urethane resins are preferable, and epoxy resins are particularly preferable.

  There is no restriction | limiting in particular as a kind of epoxy resin which can be used by this invention, For example, the polyfunctional epoxy resin which is a glycidyl etherified product of a polyphenol compound, the polyfunctional epoxy resin which is a glycidyl etherified product of various novolak resins, an alicyclic epoxy resin , Aliphatic epoxy resins, heterocyclic epoxy resins, glycidyl ester epoxy resins, glycidyl amine epoxy resins, epoxy resins obtained by glycidylation of halogenated phenols, and the like. Here, the polyfunctional epoxy resin is an epoxy resin having two or more glycidyl groups.

  Examples of polyfunctional epoxy resins that are glycidyl etherification products of polyphenol compounds include phenol, cresol, bisphenol A, bisphenol F, bisphenol S, 4,4′-biphenylphenol, tetramethylbisphenol A, dimethylbisphenol A, and tetramethylbisphenol. F, dimethyl bisphenol F, tetramethyl bisphenol S, dimethyl bisphenol S, tetramethyl-4,4′-biphenol, dimethyl-4,4′-biphenylphenol, 1- (4-hydroxyphenyl) -2- [4- ( 1,1-bis- (4-hydroxyphenyl) ethyl) phenyl] propane, 2,2′-methylene-bis (4-methyl-6-tert-butylphenol), 4,4′-butylidene-bis (3-methyl) 6-tert-butylphenol), trishydroxyphenylmethane, resorcinol, hydroquinone, pyrogallol, phenols having a diisopropylidene skeleton, phenols having a fluorene skeleton such as 1,1-di-4-hydroxyphenylfluorene, phenolized polybutadiene Etc.

  Examples of polyfunctional epoxy resins that are glycidyl etherified products of various novolak resins include, for example, various phenols such as phenol, cresols, ethylphenols, butylphenols, octylphenols, bisphenol A, bisphenol F, bisphenol S, naphthols, and the like. Novolak resin, xylylene skeleton-containing phenol novolak resin, dicyclopentadiene skeleton-containing phenol novolak resin, biphenyl skeleton-containing phenol novolak resin, fluorene skeleton-containing phenol novolak resin, and the like.

  Examples of the alicyclic epoxy resin include alicyclic epoxy resins having a cyclohexane skeleton such as 3,4-epoxycyclohexylmethyl 3 ', 4'-cyclohexylcarboxylate.

  Examples of the aliphatic epoxy resin include glycidyl ethers of polyhydric alcohols such as 1,4-butanediol, 1,6-hexanediol, polyethylene glycol, polypropylene glycol, pentaerythritol, and xylylene glycol derivatives. .

  Examples of the heterocyclic epoxy resin include heterocyclic epoxy resins having a heterocyclic ring such as an isocyanuric ring and a hydantoin ring.

  Examples of the glycidyl ester epoxy resin include epoxy resins made of carboxylic acids such as hexahydrophthalic acid diglycidyl ester and tetrahydrophthalic acid diglycidyl ester.

  Examples of the glycidylamine epoxy resin include epoxy resins obtained by glycidylation of amines such as aniline, toluidine, p-phenylenediamine, m-phenylenediamine, diaminodiphenylmethane derivative, diaminomethylbenzene derivative and the like.

  Examples of epoxy resins obtained by glycidylation of halogenated phenols include brominated bisphenol A, brominated bisphenol F, brominated bisphenol S, brominated phenol novolak, brominated cresol novolac, chlorinated bisphenol S, chlorinated bisphenol A, and bromo. Examples thereof include epoxy resins obtained by glycidylation of halogenated phenols such as phenol.

  There is no restriction | limiting in particular in the use of these epoxy resins, Although it selects suitably by a use application, Usually, bisphenol A, bisphenol F, bisphenol S, 4,4'-biphenylphenol, tetramethyl-4,4'-biphenol, 1 -(4-hydroxyphenyl) -2- [4- (1,1-bis- (4-hydroxyphenyl) ethyl) phenyl] propane, trishydroxyphenylmethane, resorcinol, 2,6-di-tert-2,6 -Di-tert-butylhydroquinone, phenols having a diisopropylidene skeleton, polyfunctional epoxy resins which are glycidylates of phenols having a fluorene skeleton such as 1,1-di-4-hydroxyphenylfluorene, phenols, cresols , Bisphenol A, bisphenol S Glycidyl etherification products of various novolak resins such as novolak resins made from various phenols such as naphthols, phenol novolak resins containing dicyclopentadiene skeleton, phenol novolak resins containing biphenyl skeleton, phenol novolac resins containing fluorene skeleton, 3,4-epoxy Cycloaliphatic epoxy resins having a cyclohexane skeleton such as cyclohexylmethyl 3 ′, 4′-cyclohexylcarboxylate, 1,6-hexanediol, polyethylene glycol, glycidyl ethers of polypropylene glycol, triglycidyl isocyanurate, hexahydrophthalic acid diester Glycidyl ester is used, but preferably bisphenol type epoxy resin, novolac type epoxy resin, biphenyl type epoxy resin, naphthalene type Epoxy resins, alicyclic epoxy resins, amine-based epoxy resin. Furthermore, these epoxy resins are appropriately selected according to necessity such as electrical insulation, adhesiveness, water resistance, mechanical strength, workability and the like, and can be used as one kind or a mixture of two or more kinds.

  Next, the curing agent and curing accelerator contained in the thermosetting resin composition will be described. Examples of the curing agent include acid anhydrides, amines, phenols, imidazoles and the like.

  Examples of acid anhydrides include aromatic carboxylic acids such as phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic anhydride, ethylene glycol trimellitic anhydride, and biphenyltetracarboxylic anhydride. Anhydrides, azelaic acid, sebacic acid, anhydrides of aliphatic carboxylic acids such as dodecanedioic acid, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, nadic acid anhydride, het acid anhydride, hymic acid anhydride, etc. And alicyclic carboxylic acid anhydrides.

  Examples of amines include aromatic amines such as diaminodiphenylmethane, diaminodiphenylsulfone, and diaminodiphenyl ether, aliphatic amines, and modified amines.

  Examples of the phenols include bisphenol A, tetrabromobisphenol A, bisphenol F, bisphenol S, 4,4′-biphenylphenol, 2,2′-methylene-bis (4-methyl-6-tert-butylphenol), 2, 2'-methylene-bis (4-ethyl-6-tert-butylphenol), 4,4'-butylene-bis (3-methyl-6-tert-butylphenol), 1,1,3-tris (2-methyl- 4-hydroxy-5-tert-butylphenol), trishydroxyphenylmethane, pyrogallol, phenols having a diisopropylidene skeleton, phenols having a fluorene skeleton such as 1,1-di-4-hydroxyphenylfluorene, phenolized polybutadiene Polyphenol compounds such as Phenol, cresols, ethylphenols, butylphenols, octylphenols, bisphenol A, brominated bisphenol A, bisphenol F, bisphenol S, novolak resins containing xylylene skeleton-containing phenol novolac resins such as naphthols, Examples thereof include various novolac resins such as a dicyclopentadiene skeleton-containing phenol novolac resin and a fluorene skeleton-containing phenol novolac resin.

  Examples of imidazoles include 2-methylimidazole, 2-phenylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, 2-phenyl-4-methylimidazole, 1-benzyl-2-phenylimidazole, 1-benzyl- 2-methylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-undecylimidazole, 2,4-diamino-6 (2′-methylimidazole (1 ′)) ) Ethyl-s-triazine, 2,4-diamino-6 (2′-undecylimidazole (1 ′)) ethyl-s-triazine, 2,4-diamino-6 (2′-ethyl, 4-methylimidazole ( 1 ′)) ethyl-s-triazine, 2,4-diamino-6 (2 -Methylimidazole (1 ')) ethyl-s-triazine isocyanuric acid adduct, 2-methylimidazole isocyanuric acid 2: 3 adduct, 2-phenylimidazole isocyanuric acid adduct, 2-phenyl-3,5-dihydroxy Various imidazoles of methylimidazole, 2-phenyl-4-hydroxymethyl-5-methylimidazole, 1-cyanoethyl-2-phenyl-3,5-dicyanoethoxymethylimidazole, and imidazoles and phthalic acid, isophthalic acid, Examples thereof include salts with polyvalent carboxylic acids such as terephthalic acid, trimellitic acid, pyromellitic acid, naphthalenedicarboxylic acid, maleic acid and oxalic acid.

  Of these curing agents, which curing agent is used is appropriately selected according to the required electrical insulation, adhesiveness, water resistance, mechanical strength, workability, etc. required for the insulating member, but is preferably a phenol novolac. Resins, acid anhydrides and amine curing agents.

  The amount of these curing agents used is in the range of 0.3 to 2.0, preferably in the range of 0.4 to 1.6, and more preferably in the equivalent ratio of the curing agent to the epoxy group of the epoxy resin. It is used in the range of 5-1.3. Moreover, the said hardening | curing agent can also be used in mixture of 2 or more types, The said imidazole can also be used as a hardening accelerator.

  Examples of the curing accelerator include 2-methylimidazole, 2-phenylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, 2-phenyl-4-methylimidazole, 1-benzyl-2-phenylimidazole, 1-benzyl. 2-methylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-undecylimidazole, 2,4-diamino-6 (2′-methylimidazole (1 ′ )) Ethyl-s-triazine, 2,4-diamino-6 (2′-undecylimidazole (1 ′)) ethyl-s-triazine, 2,4-diamino-6 (2′-ethyl, 4-methylimidazole) (1 ′)) Ethyl-s-triazine, 2,4-diamino-6 (2′-me Tyrimidazole (1 ′)) ethyl-s-triazine isocyanuric acid adduct, 2-methylimidazole isocyanuric acid 2: 3 adduct, 2-phenylimidazole isocyanuric acid adduct, 2-phenyl-3,5-dihydroxymethyl Various imidazoles such as imidazole, 2-phenyl-4-hydroxymethyl-5-methylimidazole, 1-cyanoethyl-2-phenyl-3,5-dicyanoethoxymethylimidazole, and imidazoles and phthalic acid, isophthalic acid, terephthalic acid Acid, trimellitic acid, pyromellitic acid, naphthalene dicarboxylic acid, maleic acid, salts with polyvalent carboxylic acids such as succinic acid, amides such as dicyandiamide, 1,8-diaza-bicyclo (5.4.0) undecene Diaza compounds such as 7 and their phenols , Salts with the above polycarboxylic acids or phosphinic acids, ammonium salts such as tetrabutylammonium bromide, cetyltrimethylammonium bromide, trioctylmethylammonium bromide, phosphines such as triphenylphosphine and tetraphenylphosphonium tetraphenylborate, , 4,6-trisaminomethylphenol and the like, amine adducts, and microcapsule type curing accelerators in which these curing agents are made into microcapsules.

  Which of these curing accelerators is used is appropriately selected depending on, for example, but it is preferable to use one or more of imidazoles, diaza compounds, and phosphines. When using a hardening accelerator, the usage-amount is 0.1-5 mass parts with respect to 100 mass parts of epoxy resins, Preferably it is around 1 mass part.

Furthermore, the filler contained in a thermosetting resin composition is demonstrated.
The filler is appropriately selected as necessary for the electrical insulation, adhesiveness, water resistance, mechanical strength, workability and the like required for the insulating member. For example, fused silica, crystalline silica, silicon carbide, silicon nitride, Boron nitride, calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfate, mica, talc, clay, aluminum oxide, magnesium oxide, zirconium oxide, aluminum hydroxide, magnesium hydroxide, calcium silicate, aluminum silicate, lithium aluminum silicate, zirconium silicate , Barium titanate, glass fiber, carbon fiber, molybdenum disulfide, asbestos and the like, preferably fused silica, crystalline silica, calcium carbonate, aluminum oxide, aluminum hydroxide, calcium silicate, more preferably fused silica, Result Silica, calcium carbonate, aluminum oxide.

  The usage-amount of these fillers is 30 to 95 weight% of the whole thermosetting resin composition, Preferably it is 40 to 90 weight%, More preferably, it is 50 to 90 weight%. These fillers may be used alone or in combination of two or more.

  In addition, a colorant, a coupling agent, a leveling agent, a lubricant and the like can be appropriately added to the thermosetting resin composition according to the purpose, and these will be described below.

  There is no particular limitation on the colorant, and phthalocyanine, azo, disazo, quinacridone, anthraquinone, flavantron, perinone, perylene, dioxazine, condensed azo, azomethine-based various organic dyes, titanium oxide, lead sulfate, chromium yellow, zinc yellow, chromium Examples include inorganic pigments such as vermilion, petal, cobalt purple, bitumen, ultramarine blue, carbon black, chrome green, chromium oxide, and cobalt green.

  As the coupling agent, for example, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxy Silane, N- (2-aminoethyl) 3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) 3-aminopropylmethyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane , Vinyltrimethoxysilane, N- (2- (vinylbenzylamino) ethyl) 3-aminopropyltrimethoxysilane hydrochloride, 3-methacryloxypropyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyl Silane coupling agents such as limethoxysilane, isopropyl (N-ethylaminoethylamino) titanate, isopropyl triisostearoyl titanate, titanium di (dioctyl pyrophosphate) oxyacetate, tetraisopropyl di (dioctyl phosphite) titanate, neo Titanium coupling agents such as alkoxytri (pN- (β-aminoethyl) aminophenyl) titanate, Zr-acetylacetonate, Zr-methacrylate, Zr-propionate, neoalkoxyzirconate, neoalkoxytrisneodecanoyl Zirconate, Neoalkoxytris (dodecanoyl) benzenesulfonyl zirconate, Neoalkoxytris (ethylenediaminoethyl) zirconate, Neoalkoxytris Zirconate such as (m-aminophenyl) zirconate, ammonium zirconium carbonate, Al-acetylacetonate, Al-methacrylate, Al-propionate, etc., or aluminum-based coupling agents, and the like, preferably silicon-based coupling agents. . By using a coupling agent, moisture-reliability is excellent, and a cured product with little decrease in adhesive strength after moisture absorption can be obtained.

  Examples of the leveling agent include oligomers having a molecular weight of 4000 to 12000 made of acrylates such as ethyl acrylate, butyl acrylate, and 2-ethylhexyl acrylate, epoxidized soybean fatty acid, epoxidized abiethyl alcohol, and hydrogenated castor oil.

  Examples of the lubricant include hydrocarbon lubricants such as paraffin wax, microwax and polyethylene wax, higher fatty acid lubricants such as lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid and behenic acid, stearylamide, palmitylamide Higher fatty acid amide lubricants such as oleylamide, methylenebisstearamide, ethylenebisstearamide, hydrogenated castor oil, butyl stearate, ethylene glycol monostearate, pentaerythritol (mono-, di-, tri-, or tetra -) Higher fatty acid ester lubricants such as stearate, alcohol lubricants such as cetyl alcohol, stearyl alcohol, polyethylene glycol, polyglycerol, lauric acid, myristic acid, palmitic acid, stearic acid, arachidin , Behenic acid, ricinoleic acid, such as magnesium naphthenate, calcium, metal soaps is cadmium, barium, zinc, metal salts such as lead, Karuteubarou, candelilla wax, beeswax, natural waxes such as montan wax and the like.

Next, the preparation method of a thermosetting resin composition is demonstrated.
Thermosetting resin composition includes compounding components such as epoxy resins, curing agents, curing accelerators, fillers and coupling agents, colorants, leveling agents, lubricants, and Henschel mixers and Nauter mixers when the compounding components are solid. After mixing using a blender such as a kneader, the mixture is kneaded at 80 to 120 ° C. using a kneader, an extruder or a heating roll, cooled, and then pulverized to obtain a powder.

  On the other hand, when the compounding component is liquid, it is uniformly dispersed using a planetary mixer or the like to obtain the thermosetting resin composition. When the viscosity of the liquid composition is high and the workability is poor, a solvent can be added to adjust the viscosity to be suitable for the work.

  Further, the solid composition may be used in a liquid state. In this case, the solid thermosetting resin composition obtained by the above method may be dissolved in a solvent to form a liquid, or each compounding component may be dissolved in a solvent to form a liquid composition. The solvent used in this case is not particularly limited as long as it is usually used as a solvent.

  If the thermosetting resin composition thus obtained is solid, it is generally formed into pellets and then molded with a molding machine such as a low-pressure transfer molding machine. If it is liquid, it is cast or dispensed into a mold. Then, it is cured by heating to 100 to 200 ° C. to obtain a thermosetting resin.

It is sectional drawing which showed the principal part of the igniter which concerns on 1st Embodiment. It is sectional drawing which showed the electroconductive base of FIG. It is sectional drawing which shows the manufacturing process of the assembly intermediate part for igniters which concerns on 1st Embodiment. It is sectional drawing which shows the assembly for igniters which concerns on 1st Embodiment. It is sectional drawing which showed the igniter which concerns on 1st Embodiment. It is sectional drawing which showed the gas generator using the igniter of FIG. It is sectional drawing which showed the principal part of the igniter which concerns on 2nd Embodiment. It is sectional drawing which showed the electroconductive base of FIG. It is sectional drawing which showed the principal part of the igniter which concerns on 3rd Embodiment. It is sectional drawing which showed the electroconductive base used for the igniter of FIG.

Explanation of symbols

1 Ignition cup 2 Electrode member (lead pin)
2a Electrode member (first lead pin)
2b Electrode member (second lead pin)
3 Insulating member (cured product of thermosetting resin composition)
4 Ignition Agent 5 Resistor 6 Welded Portion 7 Conductive Base 10a Ignition Agent Storage Space 10b Columnar Space 11 Igniter 12 Hole 13 Coplanar

Claims (7)

Igniter (4),
An igniter cup (1) containing the igniter (4);
A resistor (5);
At least two electrode members (2a, 2b) connected directly or indirectly to the resistor (5) for supplying current to the resistor (5);
A conductive base (7) having at least one hole (12) into which at least one electrode member (2a) formed such that at least one electrode member (2a) does not come into contact;
An insulating member (3),
An igniter (11) for igniting the ignition powder (4) by supplying a current to the resistor (5) to activate a vehicle safety device,
In the igniter cup (1), the igniter (4), the previous conductive base (7) and the insulating member (3) are stacked in this order,
The insulating member (3) is formed from a thermosetting resin composition,
The conductive base (7) is in contact with the ignition agent (4) at a contact surface (7a),
The at least one electrode member (2a) has a head in contact with the igniting agent (4) and penetrating the insulating member (3) without being in contact with the hole (12),
The igniter in which the electrode member (2a) is insulated from the other electrode member (2b) and the conductive base (7) by the insulating member (3). The at least two electrode members (2a, 2b) are:
A first lead pin (2a) inserted through the hole (12) of the conductive base (7);
A second lead pin (2b) joined to the conductive base (7) at a back surface (7b) of a contact surface (7a) between the conductive base (7) and the ignition agent (4);
The conductive base (7) can be energized,
The resistor (5) is a resistor to which a current is supplied by being joined to the conductive base (7) and the first lead pin (2a) joined to the second lead pin (2b). The igniter according to 1. The relationship between the minimum diameter A of the hole (12) provided in the conductive base (7) and the thickness B of the conductive base (7) in the depth direction of the hole (12) is:
0.9 × B <A
The igniter according to claim 1, wherein the igniter is adjusted to be   The conductive base (7) has a cup shape in which a columnar space (10b) is formed, and the insulating member (3), the first lead pin (2a), and the second lead pin (2b) are formed in the internal space. The igniter according to any one of claims 1 to 3, comprising at least a part of the igniter.   The hole (12) of the conductive base (7) has an inner diameter portion having a different size, and a portion inserted into the hole (12) of the first lead pin (2a) has an outer diameter having a different size. A minimum diameter A of the hole (12) of the conductive base (7) is smaller than a maximum outer diameter portion of a portion inserted into the hole (12) of the electrode member (2a). Item 5. The igniter according to any one of Items 1 to 4.   The ignition according to any one of claims 1 to 5, wherein the thermosetting resin composition forming the insulating member (3) is a resin composition containing an epoxy resin, a curing agent and a curing accelerator. vessel.   A gas generator comprising the igniter according to any one of claims 1 to 6.

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