JP3355331B2 - Glass header device for inflator system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an initiator (starting device) used for an airbag system provided in a vehicle. In particular, it relates to an all-glass header device used for inflating an airbag.

[0002]

2. Description of the Related Art The use of airbag systems in vehicles has recently been particularly increasing. In connection with the operation of the system (ie, inflation of the bag), the header device generally acts as an initiator in filling the airbag with gas.

[0003] A known header device made by the applicant includes an eyelet, which has a glass insulator and a ceramic insert centrally located in the eyelet. The glass insulator is hermetically sealed within the eyelet. The ceramic insert has an outer surface that is substantially flush with the end of the eyelet, and prior to insertion of the ceramic insert, the epoxy is placed in the eyelet hole.

[0004] A center electrode pin is coaxially disposed with respect to the glass insulator and ceramic insert, and a side electrode pin is welded to the eyelet. A bridge wire extends between and contacts the ceramic insert and is connected between the center electrode pin and the eyelet. When a voltage is applied, current flows between the center electrode pin and the side electrode pins and eyelets through the conductive bridge wire. In operation of the airbag inflation system, the current flowing through the bridgewire activates an ignition component that ignites the propellant charge or generates gas to fill the airbag.

[0005] With this conventional header device used in airbag systems, the ceramic insert is substantially smooth so as not to create bubbles or cracks that may adversely affect bridgewires placed thereover. It is intended to provide a flush surface. That is,
The outer surfaces of the outlets, together with the ends of the ceramic insert and the center electrode pin, are made and assembled to be substantially flat and flush with one another. To achieve the desired flushness, a grinding process is utilized. Regarding the use of the ceramic insert, it was found that there were no bubbles or cracks before or after the polishing step that weakened the bridgewire and led to the breakage of the bridgewire. Although the ceramic insert creates a favorable condition of the outer edges and surfaces without bubbles and voids, the header device uses a ceramic insert or epoxy that is used with a glass insulator to insulate the center electrode pins. It will have additional parts.

[0006] For military related applications, it is known to use initiator and header devices for ignition related purposes. In these known applications, header devices are provided in which the entire insulating body is made of sealing glass. These known prior art devices have several features that make them less suitable for use in vehicle airbag systems. These attributes include non-corrosion resistant eyelets, non-flat glass outer surfaces, and less preferred glass compositions.

It is, therefore, an object of the present invention to provide an all-glass header device suitable for a vehicle airbag system and a method of manufacturing the header device.

[0008]

According to the present invention, a header device includes a cylindrical eyelet having a hole passing through a center portion. A glass insulating member is sealed in the hole, and the glass insulating member has a central hole for receiving the first electrode pin (center electrode pin).
A second electrode pin (side electrode pin) is connected to the eyelet. The eyelets are made from a non-corrosive material such as stainless steel. The glass insulating member has an outer surface (or end) that should be substantially flush with the first outer surface of the eyelet. In one embodiment, the distance from the inner diameter to the outer diameter of the eyelet is greater than the diameter of the glass insulation. In another aspect, the glass insulation member is made from a stretched glass tube and has a length substantially equal to the length of the eyelet.

In making the all-glass header device of the present invention, a second electrode pin is welded to the eyelet. When inserting the glass insulating member into the eyelet hole, a fixing system is used. The eyelet with the second electrode pin is located in the first stationary plate, where the upper end of the eyelet extends beyond the recess formed in the first stationary plate. A slot (groove) is formed at the bottom of the recess, which extends across the diameter of the recess. The slot has sufficient width for the second electrode pin to be inserted therein.

After disposing the eyelet and the second electrode pin on the first fixing plate, the glass insulating member is inserted into the eyelet hole. Since the diameter of the glass insulating member is larger than the width of the slot, the glass insulating member cannot pass through the hole, but is supported by the fixed plate material at the bottom of the recess. After insertion, the glass insulation member is at least flush with the first outer surface of the eyelet, but may extend slightly out of the eyelet. After the glass insulating member is inserted, a second fixing plate having a plurality of cavities (recesses) is arranged on the first fixing plate, and each upper end of the eyelet is received by the cavity.

Then, both fixing plates are turned over. The first fixing plate also has a recess corresponding to each of the recesses. The first electrode pin is inserted into the central hole of the glass insulating member through the recess and the slot, and the first electrode pin is coaxial with the eyelet.

After assembling each glass header using the fixing system, the first and second fixing plates are subjected to a heating step together with the glass header device disposed therein. As a result, a compressed glass seal is achieved by the glass insulating member in the eyelet. That is, the metal eyelet has a different coefficient of thermal expansion from the glass insulating member. After heating at a predetermined temperature for a predetermined period of time, the eyelet shrinks relatively much more than the glass insulation member, thereby compressing the glass insulation member and providing the desired hermetic seal.

After the heating step, the glass header is subjected to a step to create a substantially smooth and flush outer surface or outer edge between the eyelet, the glass insulating member and the first electrode pin. Preferably, in this step, an aluminum oxide grindstone for polishing these outer surfaces or outer ends to a predetermined flatness range is used. At the completion of these steps, including surface polishing, the resulting glass insulation in the header device is flush with or slightly above the eyelets.

In connection with providing each glass header for use in an airbag system, a bridge is provided between a first outer surface of the eyelet and an end of a first electrode pin substantially flush with that surface. Wires are attached. In one embodiment, the diameter of the bridge wire is about 0.00
15 inches. The glass insulation member must not have voids, bubbles or cracks with a diameter greater than the diameter of the bridge wire. As a result, for a bridge wire diameter of 0.0015 inches, the maximum acceptable void, bubble or crack is 0.0015 inches in diameter. This requirement is intended to avoid breaks in the bridgewire due to surface voids and the like.

The bridge wire provides a conductive path between the first and second electrode pins with the first electrode pin electrically insulated from the second electrode pin by a glass insulating member. An ignition material is positioned relative to the bridge wire such that it is heated when current flows between the first and second electrode pins through the bridge wire. When the ignition material is heated, the propellant will then be ignited. The activated propellant charge is used to generate gas at a desired rate to fill the airbag.

Based on the summary of the invention described herein, a number of important features of the invention will be readily appreciated. According to the present invention, there is provided an all-glass header device that provides the required insulation between the first and second electrode pins. Instead of including ceramic inserts, the insulating material is all glass, which does not require as many components as before, thus reducing the cost of the header device. Since no epoxy or ceramic inserts are required, assembly of the all-glass header device does not require much time. In addition, a somewhat less expensive abrasive wheel can be used compared to the abrasive wheel used in providing a smooth surface to a header device having a ceramic insert.

Further advantages and advantages of the present invention will become apparent from the following description taken in conjunction with the accompanying drawings.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An all-glass header device used in an airbag system will be described with reference to FIGS. The header device 20 includes a cylindrical eyelet 24 having a central hole 28. The eyelet 24 is made of a non-corrosive material that does not cause oxidation of the eyelet. In the preferred embodiment, it is made of stainless steel specified to use industry standard 304L. Central hole 2
8 is provided so as to penetrate substantially the entire center of the eyelet. In one embodiment, the diameter of the eyelet 24 is about 0.5.
289 inches and its length (height) is about 0.138
Inches. The glass insulator or insulating member 32 is disposed in the central hole 28. The glass insulating member 32
Is approximately equal to the length of the eyelet 24,
It occupies almost the entire space defined by the central hole 28. However, the insulating member 32 has a central hole 36 for receiving the first electrode pin 40.

The insulating member 32 is a compression seal glass, preferably a sodium silicate glass. In one embodiment, glass insulation member 32 is formed from an elongated glass tube sized to be received by aperture 28.
As shown in FIG. 3, the eyelet 24 can be defined as having a first outer surface that is coplanar with the adjacent ends of the insulating member 32 and the first electrode pins 40, wherein each of the ends And the outer surface is substantially flush. This essential flatness is very important for header devices and will be explained in more detail later.

The first electrode pin 40 extends to the opposite side beyond the eyelet 24 and ends at a predetermined length. A voltage can be applied to the first electrode pin 40, and a current flows through the electrode pin 40. A second electrode pin 44 is coupled to eyelet 24 in a non-coaxial relationship. In the preferred embodiment, the second electrode pin 44 is welded to the eyelet 24 and ends at a distance from the eyelet 24 that is approximately equal to the first electrode pin 40. The second electrode pin 44 is generally used as a ground pin to complete an electrical circuit between the first and second electrode pins. As shown in FIGS. 3 and 4, a second electrode pin 44 is provided in a rim 48 on the outer peripheral portion of the eyelet 24.
Are welded to the eyelet 24. In one embodiment,
The first electrode pin 40 is made of an alloy, and the second electrode pin 44 is made of the same material as the eyelet.

A bridge wire 52 is retained between a portion of the eyelet 24 and a portion of the first electrode pin 40 to complete a conductive path between the electrode pins 40,44. The bridge wire 52 extends in contact with a part of the electrically insulating all-glass member 32. Bridge wire 5
Numeral 2 is conductive, and electrically connects the first and second electrode pins 40 and 44 via the eyelets 24. In view of the desired high smoothness and uniformity, if cracks, bubbles, or voids are present on the outer surface of the glass insulating member 32 of a sufficient size, such cracks, bubbles, Where it extends beyond the gap, it will cause the bridge wire 52 to degrade. Such deterioration is caused by the double electrode pin 4
This results in breakage of the bridge wire that causes the conductive path between 0,44 to be lost or unacceptably small.

To avoid such degradation, the maximum allowable voids and bubbles cannot be greater than the diameter of the bridgewire 52. In one embodiment, the bridge wire is 0.0015 inches in diameter and the maximum allowable void, bubble or crack diameter is 0.0015 inches.

Referring to FIG. 5, the header device 20 comprises:
It is incorporated into an airbag inflation system that helps inflate an airbag provided in the vehicle. The header device 20 is connected to the bridge wire 52 by the ignition charge 5 in the housing 60.
6 are positioned so as to come into contact therewith. The first and second electrode pins 40, 44 are connected to conductive wires 64, 6, respectively.
8 and provides a conduction path for current from the power supply. In this regard, when voltage is applied when one or more predetermined conditions are met, the eyelet 24
A current flows from the first electrode pin 40 to the second electrode pin 44 through the bridge wire 52 and heats it to a sufficient temperature, thereby activating the ignition charge 56. You. Activation of the ignition charge 56 activates the propellant charge 62 also contained within the housing 60. Ignition of the propellant charge 62 is beneficial for the generation of gas associated with the filling of the airbag with the gas.

FIGS. 6 to 11 are provided as reference diagrams for explaining one embodiment of assembling the components of the header device 20. FIG. A first fixing plate 70 is shown in FIGS. The first fixing plate 70 is substantially square and has a plurality of recesses 74 formed on a front surface 78 thereof. As shown in FIG. 8, the recesses 74 are formed uniformly and at a predetermined interval from each other, and the bottom thereof is provided to be somewhat shallower than half the thickness of the first fixing plate 70. A plurality of slots (grooves) 82 are formed across each recess 74 and one slot 82 is formed between the edges of the first stationary plate for each column of recesses 74.

As shown in FIG. 7, the first fixing plate 7
A number of concave portions 90 are formed on the back surface 86 of the zero so as to coincide with the concave portions 74. The recess 90 also
The first fixing plate 70 extends in the thickness direction by a distance slightly less than about half of the thickness. The diameter of the recess 90 is smaller than the diameter of the recess 74. The slot 82 communicates between the recess 74 and the recess 90, thereby providing a through hole between the front surface 78 and the back surface 86 of the first fixing plate 70.

The fixation system of this embodiment also includes a spacer plate 94 having a number of openings 98.
The width and length of the spacer plate 94 are substantially the same as the width and length of the first fixing plate 70. There are as many openings 98 as there are recesses 74 and recesses 90. The diameter of the opening 98 is substantially the same as the diameter of the recess 74. Spacer plate 9
4 serves to lift or space the first fixing plate 70 from the support surface. That is, as described later, the spacer plate 94 is disposed on the support surface, and the first fixing plate 70 is disposed on and supported by the spacer plate 94. Second
The electrode pin 44 has a length larger than the thickness of the first fixing plate 70.

When the second electrode pin 44 is received by the first fixed plate 70, it is obstructed by the support surface on which the first fixed plate 70 and the spacer plate 94 are located. Pass through one of the openings in the spacer plate 94 so that it does not.

As shown in FIGS. 10 and 11, the fixing system of the present embodiment further includes a second fixing plate 102. The second fixing plate 102 has a front surface 106.
And a number of recesses 110 formed in the front surface 106 and into the thickness of the second fixed plate 102 by a distance less than about half of the thickness. For each recess 110, a pin receiver 114 is provided.
Extends further from the bottom of the second fixing plate 102 in the thickness direction thereof, and the rear surface 118 of the second fixing plate 102
Not even reached.

Each of the recesses 110, like the recesses 74, has a diameter approximately equal to the diameter of the eyelets 24 of the header device 20. Pin receiver 114 is used to receive any portion of center electrode pin 40 that extends beyond the first outer surface of eyelet 24. As will be noted later in the description regarding the assembly of the header device 20 using the first and second fixing plates 70, 102 and the spacer plate 94, when placed in the first and second fixing plates 70, 102. In addition, it is common that the center electrode pin 40 is not flush with the eyelet 24 and the glass insulating member 32.

The assembly of the header device 20 using the fixing system of this embodiment is shown in FIGS. As shown in FIG. 12, the first fixing plate 7
0 is placed on the top surface of the spacer plate 94. At this time, the respective edges of the first fixing plate 70 and the spacer plate 94 are aligned, so that the concave portion 74 of the first fixing plate 70 is aligned with the opening 98 of the spacer plate 94. In this way, a communication path is established between the recess 74 and the opening 90 via the slot 82 and the recess 90.

In this agreement, as shown in FIG.
Eyelet 24 and second electrode pin 44 welded thereto
Can be inserted into one of the recesses 74. That is,
The second electrode pins 44 pass through the slots 82 and into corresponding recesses 90 and corresponding openings 98 formed in the spacer plate 94. Due to the length of the second electrode pins 44, a part thereof is received by the opening 98 and the spacer plate 94 prevents the second electrode pins 44 from contacting the support surface on which the spacer plate 94 is located. Work to do. As shown in FIG. 14, after the eyelet 24 and its corresponding electrode pin 44 have been received by the first fixing plate 70 of the spacer element 94, the substantially upper end of the eyelet 24 is placed on the front surface 7 of the first fixing plate 70.
Extends above 8.

In this position, the glass insulating member 32 is disposed in the central hole 28 of the eyelet 24. This step is performed manually using tweezers or other holding members that are operated to grasp the insulating member 32 and insert the insulating member 32 into the central hole 28.

As shown in FIG. 15, the glass insulating member 32
Is inserted, the second fixing plate 102 is aligned with the top surface of the first fixing plate 70. In this step, each recess 110 is provided with an eyelet 2 extending beyond each recess 74.
4 catch the upper end. That is, each recess 110 is
And receiving such portions of the eyelet 24 with the edges of the second fixation plates 70, 102 and the spacer plate 94 substantially coincident or flush with each other. After the second fixation plate 102 is placed on the first fixation plate 70, the fixation system or this combination of plates is turned over so that the second fixation plate 102 is on a support or table.

Then, as shown in FIG. 16, the spacer plate 94, which was the upper member after the reversal, is removed, and as a result, the second electrode pins 44 are exposed. It is observed to extend from 86. In this arrangement, the first electrode pins 40
It can be inserted into the central hole 36 formed in the glass insulating member 32. In particular, first, the center electrode pin 40 is provided with the recess 90, the slot 82, and the first fixing plate 7
After passing through the concave portion 74 formed at 0, it is subsequently put into the central hole 36 formed at the glass insulating member 32. Second
The center electrode pins 40 can extend outwardly from the glass insulation member 32, if necessary, due to the pin receiver 114 formed on the fixed plate 102 of FIG.

As shown in FIG. 18, an assembled header device 20 is shown for subsequent processing to obtain the final product. For such processing steps, the first and second stationary plates 70, 102 are placed in a heating unit or furnace to melt the glass and create a hermetic seal. The fixing plate together with the header device is held in the heating unit at a predetermined temperature for a predetermined time. The time and temperature are about the same as those required to melt the glass in a conventional header device that includes a ceramic insert and epoxy.

Since the eyelet 24 is made of a metal that shrinks much more quickly than the glass insulating member 32, the glass insulating member 32 is compressed during the heating process to allow a hermetic seal to be formed. Preliminary tests have achieved a hermetic seal of 2.7 × 10 ⁻⁷ SPDcc / sec for helium. In addition, after the glass is compressed as a result of the heating step, the first outer surface of the glass insulation member 32 is above the eyelet 24 or the glass insulation member 32 is greater than 0.015 inches above the eyelet 24. It is flush with eyelet 24 in the unextended state.

As shown in FIG. 3, a meniscus (semicircular portion) of the glass seal is also formed adjacent to the bottom of the central hole 28 formed in the eyelet 24. The bottom of the meniscus substantially coincides with the bottom of the outer surface of the eyelet 24.

After the heating step and the associated melting step, a further processing step is essentially smoothing between the first outer surface of the eyelet 24 and the adjacent end of the glass insulation member and the center electrode pin 40. And ensuring uniformity. As previously indicated, the center electrode pin 40
May extend outward beyond the first outer surface of the eyelet 24. In order to flush the ends of the center electrode pin 40, the processing process is similar to that of the first outer surface material of the eyelet 24 and the end of the glass insulation member 32 adjacent to the outer surface. A step of removing the pin material is included. Removal of such material is performed using a grinding machine or grinding wheel. In a preferred embodiment, the grinding wheel is made from an aluminum oxide material.

When the ceramic insert of a conventional header device is ground, a silicon carbide grinding wheel has typically been used. Such materials are somewhat expensive. Also, such wheels need to be replaced or polished after a certain amount has been used, making the grinding process much more costly. After the grinding operation, the glass insulation member 32 is substantially flush with the first outer surface of the eyelet 24, or is above the eyelet 24 (preferably less than 10,000ths of an inch). Accordingly, the first outer surface of the eyelet 24 and the center electrode pin 40 and the glass insulating member 32
Are substantially planar.

After the polishing or smoothing operation is completed,
The header device 20 is cleaned and ready for incorporation into an airbag system. As noted above, such preparation includes a step of attaching or welding a bridge wire 52 between the eyelet 24 and the center electrode pin 40. Before the header device 20 is suitable for use in an airbag system, a check is also made to ensure that the maximum allowable air gap (bubbles or cracks) on the outer surface of the glass insulation member 32 is not excessive.

A glass header 20 having such voids, bubbles or cracks cannot be used, as it is not acceptable to apply or repair a glass insulation member to meet this requirement. Once the bridge wire 52 has been secured, the final step is entered and the header device 20 with the bridge wire 52 will be incorporated into an airbag system as shown in FIG.

From this detailed description, several important advantages of the present invention are found. An all-glass header device for an airbag system is provided that is characterized by the absence of a ceramic insert and epoxy used to hold the insert within the eyelet bore.
For this reason, much less members are required than in the past. As a result, much less expense is required in manufacturing an all-glass header device. In addition, in making the essential flush, a much cheaper grinding machine can be used than before, and the glass used in the present invention has voids that make the header device unusable,
It will be polished without bubbles or cracks.

The foregoing description has been made for the purpose of illustration and description of the invention and is not meant to limit the invention to the embodiments disclosed herein. Therefore, other examples having the same standards as the technology and knowledge in the disclosures and related fields can be said to be within the scope of the present invention. As an example, the first electrode pins 40 may be eccentrically arranged with respect to the eyelet 24 instead of being on the same axis.

[0044] Further, the glass insulator 32, compression seal glass, soda lime, may be made from any one material in our and sodium silicate.

The preferred embodiment described above describes the best mode for practicing the invention, allows others skilled in the art to make use of the invention, and further reduces the need for using the invention in airbag systems. It is intended to provide various alternatives.

[0046]

As described in detail above, the glass header device of the present invention provides necessary insulation between the first and second electrode pins, and is very suitable for a vehicle airbag system. Unlike conventional header devices that include ceramic inserts, the insulating material in the present invention is all glass and does not require as many components as before, thus reducing the cost of the header device. Since no epoxy or ceramic inserts are required unlike conventional devices, the assembly of the header device does not require much time. In addition, as a grinding wheel used when giving a smooth surface to the header device,
It becomes possible to use a cheaper one than before.

[Brief description of the drawings]

FIG. 1 is a perspective view of a glass header device of the present invention.

FIG. 2 is a top view (plan view) of the header device.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2, showing a glass member disposed in a hole of an eyelet, a first electrode pin disposed in a central hole of the glass member, and a first electrode pin and an eyelet; And a bridge wire for electrically connecting.

FIG. 4 is a perspective view from the bottom side of the header device.

FIG. 5 is a schematic sectional view of a header device used in the airbag system.

FIG. 6 is a plan view of a first fixed plate used to support a number of eyelets with second electrode pins for receiving a glass insulation member.

FIG. 7 is a bottom view of the first fixing plate, showing a slot (groove) passing through the bottom of the recess and a hole communicating with the recess by the slot.

FIG. 8 is a sectional view taken along line 8-8 in FIG. 6, showing a state of communication between the concave portion, the slot, and the hole;

FIG. 9 is a plan view of a spacer plate useful for receiving a second electrode pin.

FIG. 10 is a plan view of the second fixing plate, showing a cavity (recess) for receiving the upper end of the eyelet;

FIG. 11 is a sectional view taken along line 11-11 of FIG. 10, showing the depth of the cavity.

FIG. 12 is a perspective view showing a procedure for assembling the header of the present invention.

FIG. 13 is a perspective view showing a procedure for assembling the header of the present invention.

FIG. 14 is a perspective view showing a procedure for assembling the header of the present invention.

FIG. 15 is a perspective view showing a procedure for assembling the header of the present invention.

FIG. 16 is a perspective view showing a procedure for assembling the header of the present invention.

FIG. 17 is a perspective view showing a procedure for assembling the header of the present invention.

FIG. 18 is a perspective view showing a procedure for assembling the header of the present invention.

[Explanation of symbols]

Reference Signs List 20: header device, 24: eyelet, 28: central hole of eyelet, 32: glass insulating member, 40: first electrode pin, 44: second electrode pin, 52: bridge wire, 56: ignition charge, 70: A first fixing plate,
82 ... slot, 102 ... second fixing plate.

──────────────────────────────────────────────────続 き Continued on the front page (72) James A. Inventor. Longwell 80107 Elizabeth Country Road, Colorado, United States of America 17-21 29260 (56) References JP 61-8600 (JP, A) US Patent 4,267,567 (US, A) (58) Fields studied (Int. Cl. ⁷ , (DB name) F42B 3/10 B60R 21/26

Claims (12)

(57) [Claims] A bridge wire (5) having a predetermined diameter.
A header device (20) used to ignite the igniter (56) by energizing through 2), wherein the header device (20) is formed of a non-corrosive material and has a hole (28) and a first A conductive eyelet (24) having a first outer surface of the eyelet, wherein the conductive eyelet is formed of a glass material and is disposed within a bore of the eyelet, and is substantially in contact with the first outer surface of the eyelet. An insulator (32) coplanar with a first insulator (32) disposed in the insulator (32) while being electrically insulated from the eyelet by the insulator (32);
Electrode pin means (40,
44), wherein an end of the first electrode pin (40) is substantially flush with the insulator (32) and the eyelet (24), and the insulator (32) An air gap having an end adjacent to the first outer surface of the eyelet;
A header device having a diameter smaller than a diameter of a bridge wire (52) disposed between the eyelet (24) and the first electrode pin (40). 2. The eyelet (24) has a predetermined diameter.
And the bridge wire (52) has a predetermined length.
The diameter of the eyelet is equal to the length of the bridge wire.
2. The header device according to claim 1, wherein the header device is larger . 3. The bridge wire (52) contacts the first electrode pin (40) at the center of the insulator (32).
3. The header device according to claim 2, which is continued . 4. An inner diameter to an outer diameter of the eyelet (24).
Distance from the inner diameter to the outer diameter of the insulator (32)
2. The header device according to claim 1, wherein the header device is larger than the distance. 5. A part of said first electrode pin (40)
It is surrounded by the insulator (32), and a part of the
The header device according to claim 1, wherein the header device has a constant diameter. 6. The electrode pin means (40, 44) comprises:
The second electrode pin (4) connected to the eyelet (24)
4. The header device according to claim 1, comprising: (4). 7. The insulator (32) includes a compression seal glass.
, Soda lime, and sodium silicate
Made of stainless steel, and the eyelets are made of stainless steel
The header device according to claim 1. 8. A method of manufacturing a header device, comprising : providing a first eyelet (24) having a hole (28).
And an insulator (3) having a central hole formed essentially of glass.
2) inserting the glass insulator (32) into the eyelet (24);
Disposing the first electrode pin (40) adjacent to a first outer surface;
Positioning the glass insulator (32) in the eyelet (24);
Sealing and the first outside of the eyelet (24)
On the side surface, the eyelet (24), the glass
A space between the insulator (32) and the first electrode pin (40).
The header device (20) is processed to ensure
In the processing step, the eyelet hole (2
8) is filled with the glass insulator and then the holes (2)
8) includes a heating step of melting the glass insulator (32).
And heating the glass insulator (32).
The first outer surface of the eyelet (24) has less
At least the heating step.
After that, the glass insulator is placed outside the first outside of the eyelet.
Being less than 0.015 inches from the side surface
A method for manufacturing a header device. 9. The processing step may be performed after the heating step.
There, using the aluminum oxide grinding means, said first outer surface of the eyelet (24), and its first
9. A method for manufacturing a header device according to claim 8 , comprising the step of grinding at least one of an end of the glass insulator (32) adjacent to the outer surface of the first electrode pin and the first electrode pin (40). . 10. Before Kihe Dda device (20) the method for manufacturing the header according to claim 8 which process further comprises comprising a incorporated into an air bag system for a vehicle. 11. The first fixing plate (70) having at least one first recess (74 ).
The method for manufacturing a header device according to claim 8 , further comprising the step of: 12. To provide an airbag system.
The method used, comprising a hole (28) and a conductive material formed of a non-corrosive material.
An eyelet (24) , formed of a glass material, and in a hole of the eyelet.
And is essentially in contact with the outer surface of the eyelet
An insulator (32) coplanar with a first electrode pin disposed at the center of the insulator (32);
(40) and the first electrode pin is formed by the insulator
Being electrically insulated from the eyelet;
The electrode pin (40) is provided with the insulator (32) and the eye.
Has a termination that is essentially flush with the let (24)
And a second electrode pin connected to the eyelet (24)
(44) providing a header device (20) comprising:
And a small amount of the eyelet (24) and the insulator (32).
At least a bridge wire (52) adjacent to a part is arranged.
Igniter (5) adjacent said bridge wire (52).
6) disposing the non-corrosive eyelet (24) and the bridge wire
Surrounding the (52) with a housing (60);
The housing is adjacent to the header device (20)
A propellant (62) to be placed and
That the perant can be ignited using the ignition device
A method that includes