JP2016190580A - Gas generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a gas generator which achieves lighter weight than a conventional gas generator while having sufficient strength.SOLUTION: A gas generator 100 includes: a housing 10; a holder 20 attached to an opening end at one side of the housing 10; and a closing member 12 which is attached to the other end part of the housing 10 so as to close the other opening end of the housing 10. The housing 10 comprises a long cylindrical member having openings at both axial ends and made of a fiber-reinforced member molded by using a thermosetting resin or a thermoplastic resin and a fiber bundle or a fiber yarn. Gas jetting ports 11 are provided on a peripheral wall near an end part at a side of the housing 10 to which the closing member 12 is attached. The gas jetting ports 11 are holes for jetting a gas generated in the gas generator 100 to the outside and provided along a circumferential direction and an axial direction of the housing 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a gas generator incorporated in an airbag device as an occupant protection device mounted on an automobile or the like, and more particularly to a so-called cylinder type gas generator having a long cylindrical outer shape.

  In a cylinder-type gas generator, there is an extremely strong demand for improvement in mountability to a vehicle or the like, and the reduction in size and weight is an important issue. Therefore, in recent years, an attempt has been made to change relatively heavy components such as a housing and a filter, which are main components of a cylinder-type gas generator, to small and lightweight components. One of them is that one of the axial ends of a rolled steel plate represented by SPCE or an ERW pipe represented by STKM is used for a housing which is a strength component from a conventionally used member made of stainless steel or steel. Attempts to change to a small-diameter press-molded product such as a metal molded product formed into a bottomed cylindrical shape by closing the substrate (for example, see Patent Document 1 below).

JP 2011-143777 A

  However, in recent years, for a variety of reasons such as further improving the fuel efficiency of automobiles and the like, further reduction in weight is desired for the gas generator while maintaining the same strength as in the past.

  Accordingly, an object of the present invention is to provide a gas generator that has a sufficient strength and is lighter than the conventional one.

(1) The gas generator of the present invention includes a working gas generation chamber in which a working gas is generated by burning a gas generating agent sealed in a cylindrical member, and a working gas generated in the working gas generation chamber. A long cylindrical housing containing a filter chamber in which a passing filter is accommodated, and an igniting agent, and disposed at one end in the axial direction of the housing. Gas generating agent igniting means capable of igniting and burning the gas generating agent inside the cylindrical member by breaking or melting the cylindrical member, and a closure disposed at the other axial end of the housing And the housing is made of a fiber reinforced member formed into a long cylindrical shape using a resin and a fiber bundle or fiber yarn, and the filter chamber is formed from the working gas generation chamber. Also the shaft of the housing A plurality of gas jets for ejecting the working gas that has passed through the filter to the outside are provided on a peripheral wall portion of a portion that defines the filter chamber of the housing. At least one of the gas generating agent igniting means and the closing member is closed between the gas generating agent igniting means and one end of the housing, and between the closing member and the other end of the housing. And the gas generating agent ignition means and the closing member are fixed to the housing.

  According to the configuration of (1) above, it is possible to provide a gas generator that is lighter than the conventional one while having sufficient strength.

(2) In the gas generator according to (1), at least two stepped portions are formed at an outer end portion of the gas generating agent ignition means or an outer end portion of the closing member. It is preferable that an end portion of the housing covers a first step portion including at least the edge portion among the portions.

  According to the configuration of (2) above, the outer end of the gas generating agent ignition means or the outer end of the closing member can be securely held and only the first step portion of the stepped portion is covered. Since it is good, it becomes easy to form both ends of the housing, and a gas generator that is easy to manufacture can be provided.

(3) In the gas generator of (1) or (2), it is preferable that the gas outlet is formed after the housing is molded.

  According to the configuration of (3) above, the gas ejection port is formed after the housing is molded, so that the manufacture is easy. In addition, the molded housing is made of a fiber reinforced member and has sufficient strength. For example, even if the gas outlet is opened by cutting or punching, the gas outlet is punched so as not to lose its shape. Can be formed.

(4) In the gas generator of the above (1) to (3), an inner cylinder member that includes the working gas generation chamber and the filter chamber inside is further provided in the housing. The cylindrical member is preferably provided with an opening corresponding to the position of the gas ejection port.

  According to the configuration of (4) above, the housing can be easily formed by using a resin and a fiber bundle or fiber yarn as a base when forming the housing. Moreover, since the opening part corresponding to the position of the gas jet nozzle of a housing is previously provided in the inner cylinder member, the gas generated at the time of an operation | movement can be discharge | released reliably.

(5) In the gas generator of the above (4), notches are formed at both ends in the axial direction of the inner cylinder member, and the notches are formed in the gas generating agent ignition means and the plug. It is preferable that a fitting portion to be fitted is provided.

  According to the configuration of (5) above, since the position of the opening provided in the inner cylinder member can be determined with reference to the notch, after the housing is molded around the inner cylinder member, Moreover, it becomes possible to grasp | ascertain the position of the opening part provided in the inner cylinder member easily. Thereby, even after the housing is molded, the gas outlet of the housing can be easily formed as an opening.

(6) In the gas generator of the above (2) to (5), a ring-shaped member that has a hole portion that fits in the stepped portion as a center and sandwiches an end portion of the housing together with the stepped portion. It is preferable to be provided.

  According to the configuration of (6) above, the end of the housing can be firmly fixed to the outer end of the gas generating agent ignition means or the outer end of the closing member.

(7) In the gas generator of the above (6), it is preferable that the ring-shaped member fitted to the stepped portion is fixed by caulking from the periphery toward the center. Here, “caulking and fixing” means that a pressing force is evenly applied from the outside periphery of one object toward the center, and the diameter is uniformly reduced toward the other object located inside the one object. Let it be fixed.

  According to the structure of said (7), a ring-shaped member can be reliably fixed to the step part of a gas generating agent ignition means or the step part of a closure member.

(8) In the gas generators of the above (1) to (7), the resin used for molding the housing is a thermosetting resin, and the curing temperature when the thermosetting resin is used is as follows. The gas generating agent and the igniting agent preferably have an ignition point or lower or a melting point or lower.

  According to the configuration of (8) above, the housing can be formed safely.

It is a mimetic diagram showing the internal structure of the gas generator concerning a 1st embodiment of the present invention which expressed a part in section. (A) is an expanded sectional view around the closure member in the gas generator of FIG. 1, (b)-(e) is a figure which shows the modification of (a). It is a figure which shows an example of the manufacturing process of the gas generator of FIG. (A) is typical sectional drawing which shows the internal structure of the gas generator which concerns on 2nd Embodiment of this invention which represented a part with a cross section, (b) is the inside of the gas generator which concerns on 2nd Embodiment of this invention It is a side view which shows a cylinder member. (A) is an expanded sectional view of the closure member periphery in the gas generator of FIG. 3, (b)-(e) is a figure which shows the modification of (a).

<First Embodiment>
FIG. 1 is a schematic cross-sectional view showing the internal structure of a cylinder-type gas generator according to a first embodiment of the present invention. Fig.2 (a) is an expanded sectional view around the closure member in the gas generator of FIG. FIG. 3 is a diagram illustrating an example of a manufacturing process of the gas generator of FIG. Below, with reference to FIGS. 1-3, the internal structure of the cylinder type gas generator which concerns on 1st Embodiment of this invention is demonstrated.

(Configuration of gas generator 100)
The gas generator 100 has a long and substantially cylindrical outer shape, and closes the housing 10, the holder 20 attached to one open end of the housing 10, and the other open end of the housing 10. And a closing member 12 attached to the other end of the housing 10.

  The housing 10 is made of a long cylindrical member having openings at both ends in the axial direction, and a manufacturing process described later using a thermosetting resin and a fiber bundle or fiber yarn made of glass fiber or carbon fiber. It consists of the fiber reinforced member (member which has a fiber reinforced composite material as a main component) shape | molded through these. Here, representative examples of thermosetting resins that can be used include epoxy resins, phenol resins, unsaturated polyester resins, vinyl ester resins, cyanate ester resins, polyimide resins, and the like. These are used alone or as a mixture. May be used as A gas outlet 11 is provided on the peripheral wall near the end of the housing 10 where the closing member 12 is attached. The gas ejection ports 11 are holes for ejecting the gas generated inside the gas generator 100 to the outside, and a plurality of gas ejection ports 11 are provided along the circumferential direction and the axial direction of the housing 10.

  The closing member 12 is made of a metal such as stainless steel, steel, aluminum alloy, or stainless alloy, and is made of a disk-shaped member having a predetermined thickness, and includes a first step portion 12a and a second step portion 12b. Has an attached part. As shown in FIGS. 1 and 2A, the side surface of the closing member 12, the surface of the first step portion 12a, and the side surface of the second step portion 12b are covered with one end portion of the housing 10. , And is fixed to one end of the housing 10. Further, the first step portion 12 a and the second step portion 12 b of the closing member 12 sandwich the one end portion of the housing 10 together with the ring-shaped member 13. The ring-shaped member 13 is caulked and fixed from the outside toward the second step portion 12b.

  The holder 20 is made of a metal such as stainless steel, steel, an aluminum alloy, or a stainless alloy, and is made of a cylindrical member having a hollow opening 21 extending in the same direction as the axial direction of the housing 10. It has a stepped portion including 20a and the second stepped portion 20b. As shown in FIG. 1, the side surface and the outer end surface of the holder 20 are covered with the other end portion of the housing 10 and are fixed to the other end portion of the housing 10. Further, the first step portion 20 a and the second step portion 20 b of the holder 20 sandwich the other end portion of the housing 10 together with the ring-shaped member 14. The ring-shaped member 14 is fixed by caulking from the outside toward the second step portion 20b.

  As shown in FIG. 1, an igniter 50 as an ignition means is disposed at one end portion of the housing 10 in the axial direction (that is, a portion near the holder 20). In addition, the holder 20 which fixes the igniter 50 and the igniter 50 has a function as an ignition means for generating a flame for burning a granular gas generating agent 30 which will be described later.

  The igniter 50 is inserted into the hollow opening 21 of the holder 20 and fixed by caulking. More specifically, the holder 20 has a caulking portion (not shown) at the end facing the space inside the housing 10, and the igniter 50 is inserted into the hollow opening 21 to hold the holder 20. The igniter 50 is clamped by the holder 20 and the igniter 50 is fixed to the holder 20 by caulking the caulking portion in a state where the igniter 50 is affixed to the holder 20.

  More specifically, the igniter 50 includes a base frame for inserting and holding the pair of terminal pins 52 and a squib cup attached to the base frame, and the terminal pins 52 inserted into the squib cup. A resistor (bridge wire) is attached so as to connect the tips of the squib cups, and an igniting agent is filled in the squib cup so as to surround the resistor or in contact with the resistor. Nichrome wire or the like is generally used as the resistor, and ZPP (zirconium / potassium perchlorate), ZWPP (zirconium / tungsten / potassium perchlorate), lead tricinate, or the like is generally used as the igniting agent. The squib cup is generally made of metal or plastic.

  When a collision is detected, a predetermined amount of current flows through the resistor via the terminal pin 52. When a predetermined amount of current flows through the resistor, Joule heat is generated in the resistor, and the ignition powder starts to burn upon receiving this heat. The high temperature flame generated by the combustion ruptures the squib cup containing the igniting agent. The time from when the current flows through the resistor until the igniter 50 is activated is 2 milliseconds or less when a nichrome wire is used as the resistor.

  As shown in FIG. 1, a combustion chamber 17 and a filter chamber 18 are provided in the internal space of the housing 10. The combustion chamber 17 accommodates an aluminum cup member 31 in which a gas generating agent 30 is sealed. The cup member 31 is composed of a thin metal bottomed cup body and a substantially disc-shaped cover member corresponding to a lid. When the gas generator 100 is operated, the flame particles of the igniting agent and Of the bottom of the cover member or the cup body, the one on the igniter 50 side is broken or melted by the high temperature gas.

  The gas generating agent 30 is ignited by a flame generated by being ignited by the igniter 50, and generates gas by burning. The gas generating agent 30 is generally formed as a molded body containing a fuel, an oxidant, and an additive. As the fuel, for example, a triazole derivative, a tetrazole derivative, a guanidine derivative, an azodicarbonamide derivative, a hydrazine derivative, or a combination thereof is used. Specifically, for example, nitroguanidine, guanidine nitrate, cyanoguanidine, 5-aminotetrazole and the like are preferably used. The oxidant was selected from basic nitrates such as basic copper nitrate, perchlorates such as ammonium perchlorate or potassium perchlorate, alkali metals, alkaline earth metals, transition metals, and ammonia. For example, nitrates containing cations are used. As the nitrate, for example, sodium nitrate, potassium nitrate and the like are preferably used. In addition, examples of the additive include a binder, a slag forming agent, and a combustion adjusting agent. As the binder, for example, a cellulose derivative such as hydroxypropylene methylcellulose, an organic binder such as a metal salt of carboxymethylcellulose, a stearate, an inorganic binder such as synthetic hydroxytalcite, and acid clay can be suitably used. As the slag forming agent, silicon nitride, silica, acid clay, etc. can be suitably used. Moreover, as a combustion regulator, a metal oxide, ferrosilicon, activated carbon, graphite, etc. can be used suitably. Here, for example, the composition of the gas generating agent 30 is guanidine nitrate / basic copper nitrate / potassium perchlorate, and guanidine nitrate / basic copper nitrate / potassium perchlorate constituting the gas generating agent 30 is formed. When the weight composition ratio is 55: 39: 6 in this order, the ignition point of the gas generant composition granule waiting for 4 seconds is about 230 ° C. Regarding the melting point and decomposition temperature of each component, guanidine nitrate has a melting point at about 215 ° C., basic copper nitrate has a melting point at about 220 ° C., and potassium perchlorate is Decomposes above 400 ° C. Therefore, the curing temperature of the thermosetting resin used for molding the housing 10 is preferably about 200 ° C. or less. Thus, the thermosetting resin used for molding the housing 10 is selected and determined by comparing the curing temperature of the resin with the ignition point, melting point, and decomposition temperature of the gas generant composition used. .

  The shape of the molded body of the gas generating agent 30 includes various shapes such as granules, pellets, columns, and disks. In addition, a porous (for example, a single-hole cylindrical shape or a porous cylindrical shape) having a hole inside the molded body is also used.

  As shown in FIG. 1, the filter chamber 18 communicates with the outside through the gas ejection port 11 provided on the peripheral wall of the housing 10 described above. In the filter chamber 18, a filter 40 made of a cylindrical member having a substantially columnar space 40a at the center is accommodated. In addition, when the filter 40 made of a cylindrical member is used in this way, the flow resistance of the working gas flowing through the filter chamber 18 during operation can be kept low, and an efficient gas flow can be realized. As the filter 40, for example, a wire made of a metal such as stainless steel or steel, a wire wound around a net, or a material pressed by pressing is used. Specifically, an aggregate of knitted wire mesh, plain weave wire mesh, or crimp-woven metal wire is used. When the gas generated in the combustion chamber 17 passes through the filter 40, the filter 40 functions as a cooling means for cooling the gas by taking away the high-temperature heat of the gas, and slag contained in the gas. It also functions as a removing means for removing the like. Here, as a modified example of the filter 40, a filter having a labyrinth channel formed by combining substantially cylindrical or mortar-shaped parts made of metal may be used. Thereby, since the course of working gas can be changed in various directions, it is possible to cool gas and remove slag.

  A female connector (not shown) is attached to the end of the gas generator 100 where the holder 20 is disposed. This female connector is a part to which a male connector of a harness that transmits a signal from a collision detection unit provided separately from the gas generator 100 is connected. A shorting clip (not shown) is attached to the female connector as necessary. The shorting clip is attached to prevent malfunction of the cylinder-type gas generator 100 due to electrostatic discharge or the like when the gas generator 100 is transported. When the male connector of the harness is inserted into the female connector, the contact with the terminal pin 52 is released.

(Manufacturing process of the gas generator 100)
Next, with reference to FIG. 3, the manufacturing process of the cylinder type gas generator which concerns on 1st Embodiment of this invention is demonstrated.

  First, as shown in FIG. 3A, a holder 20 and an igniter 50 (not shown) are sequentially formed on a prepreg sheet 10A made of a fiber-reinforced composite material serving as a base of the housing 10 from the left side of FIG. 1) and the like, the cup member 31, the filter 40, and the closing member 12 are arranged in a line. Subsequently, the prepreg sheet 10 </ b> A is wound around the outer periphery of the ignition means, the cup member 31, the filter 40, and the closing member 12 arranged in a line to form a cylinder. Next, one end of the prepreg sheet 10A is bent so as to cover the first step portion 20a and the second step portion 20b of the holder 20 so as to have a shape as shown in FIG. Further, the other end of the prepreg sheet 10A is bent so as to cover the first step portion 12a and the second step portion 12b of the closing member 12 so as to have the shape shown in FIGS. 1 and 2A. Here, when the resin used for the prepreg sheet 10 </ b> A is a thermosetting resin, the housing 10 is molded by thermosetting below the ignition point and below the melting point of the gas generating agent 30 and the ignition agent. Next, the ring-shaped member 14 is fitted to one end of the housing 10 and the ring-shaped member 13 is fitted to the other end of the housing 10 (see FIG. 3B), and the ring-shaped members 13 and 14 are caulked from the periphery toward the center. It fixes (refer FIG.3 (c)). Thereafter, the gas ejection port 11 is formed by cutting or the like.

  Here, the prepreg sheet 10 </ b> A may be any weaving method such as plain weave or twill weave (cross material (woven fabric prepreg)), or one in which fibers are aligned in one direction (UD material ( Unidirectional prepreg)). In addition, the prepreg sheet 10 </ b> A may include one containing at least one of various fibers such as carbon fiber, glass fiber, and aramid fiber. The prepreg sheet 10A can be produced by impregnating a resin in which these fibers are woven and semi-curing them.

  Further, the molding process of the housing 10 described above is of a type generally called a sheet winding method, but the molding method of the housing 10 is not limited to this method. For example, a continuous carbon fiber impregnated with a resin is wound around a metal core and formed into a cylindrical shape (filament winding method). If glass fiber is used, target is a mixture of glass fiber and resin. The housing 10 can be molded using various known molding methods such as a method of spraying on an object and molding.

  Next, the operation | movement at the time of the action | operation of the gas generator 100 demonstrated above is demonstrated. When a vehicle equipped with an airbag device incorporating the gas generator 100 according to the present embodiment collides, the collision is detected by a collision detection unit provided separately in the vehicle, and based on this, the igniter 50 is detected. Operates. When the igniter 50 is activated, the pressure in the igniter 50 increases due to combustion of the igniting agent, whereby the tip of the igniter 50 is ruptured, and the flame flows out from the tip of the igniter 50 to the outside. The bottom surface of the cup member 31 on the holder 20 side is broken or melted by the above-described flame, and the flame reaches the gas generating agent 30.

  The gas generating agent 30 is ignited and burned by the flowing heat particles, and a large amount of gas is generated. Due to the combustion of the gas generating agent 30, the bottom surface of the cup member 31 on the side of the closing member 12 is broken or melted and the pressure in the combustion chamber 17 rises, and the gas generated thereby flows into the filter chamber 18. The flowing gas is cooled to a predetermined temperature via the filter 40. A large amount of the cooled gas is ejected from the gas ejection port 11 to the outside of the gas generator 100. The gas ejected from the gas ejection port 11 is guided into the airbag to inflate and deploy the airbag.

(Main features of the gas generator 100)
According to the present embodiment, it is possible to further reduce the weight of the housing 10 while giving the housing 10 sufficient strength. Therefore, it is possible to provide a gas generator that is lighter than before.

  Moreover, the first step portion 20a and the second step portion 20b of the holder 20 and the first step portion 12a and the second step portion 12b of the closing member 12 are covered by both end portions of the housing 10 which is reduced in weight. The both ends of the housing 10 can be closed, and the holder 20 and the closing member 12 can be securely fixed.

  Furthermore, the first step portion 12a and the second step portion 12b of the closing member 12 sandwich one end portion of the housing 10 together with the ring-shaped member 13, and the first step portion 20a and the second step portion 20b of the holder 20 are Since the other end portion of the housing 10 is sandwiched together with the ring-shaped member 14, both ends of the housing 10 can be more securely closed, and the holder 20 and the closing member 12 can be firmly fixed.

  In addition, the ring-shaped member 13 is caulked and fixed from the outside toward the second step portion 12b, and the ring-shaped member 14 is caulked and fixed from the outside toward the second step portion 20b. Thereby, the ring-shaped members 13 and 14 can be reliably fixed by the holder 20 or the closing member 12.

Second Embodiment
4A is a schematic cross-sectional view showing the internal structure of a gas generator according to the second embodiment of the present invention, in which FIG. 4A is a partial cross-sectional view, and FIG. It is a side view which shows the inner cylinder member of a generator. Fig.5 (a) is an expanded sectional view around the closure member in the gas generator of FIG. Below, with reference to FIG.4 and FIG.5, the internal structure of the cylinder type gas generator which concerns on 1st Embodiment of this invention is demonstrated. In addition, when the last two digits of the code | symbol in this embodiment are the same as the code | symbol of the site | part of 1st Embodiment, since it is the same site | part unless otherwise indicated, the description may be abbreviate | omitted.

(Configuration of gas generator 200)
As shown in FIG. 4, the gas generator 200 according to the second embodiment is the same as the first embodiment in that an inner cylindrical member 160 made of metal such as aluminum or iron is provided inside the housing 110. It differs mainly from the gas generator 100 which concerns. More specifically, as shown in FIG. 4, the inner cylinder member 160 includes an ignition means having a holder 120 and the like, a combustion chamber 117 in which a cup member 131 is included, and a filter chamber in which a filter 140 is included. 118 and a closing member 112 are relatively thin cylindrical members. The inner cylinder member 160 includes a plurality of long and thin openings 161 formed in accordance with the position of the filter chamber 118, and a notch 162 formed at a position corresponding to one position of the plurality of openings 161. , 163.

  The plurality of openings 161 are arranged at predetermined angles (for example, every 30 °, 60 °) around the axis of the inner cylinder member 160 so as to correspond to the positions of the plurality of gas ejection ports 111 arranged in the length direction of the housing 110. At a predetermined interval.

  As shown in FIG. 4B, the cutout portion 162 has a shape that allows the convex fitting portion 120 c provided on the holder 120 to be fitted. Further, as shown in FIG. 4B, the notch 163 has a shape that allows the convex fitting portion 112 c provided on the closing member 112 to be fitted.

(Manufacturing process of gas generator 200)
The filter 140 is inserted into the inner cylinder member 160 in accordance with the position of the opening 161, and the cup member 131 is loaded at a position adjacent to the filter 140 inside the inner cylinder member 160. Next, as shown in FIG. 4B, the closing member 112 is inserted into the inner cylinder member 160 so that the fitting portion 112c fits into the cutout portion 163, and the fitting portion 120c is cut out. The holder 120 is inserted into the inner cylinder member 160 so as to be fitted to 162. Thereafter, a prepreg sheet similar to that of the first embodiment is wound around the outer periphery of the inner cylinder member 160 to form a cylinder. At this time, the position of the notch 162 or the notch 163 is grasped. Next, the first step portion 120a and the second step portion 120b of the holder 120 and the one end portion 160a of the inner cylinder member 160 are arranged so that one end of the prepreg sheet has a shape as shown in FIG. Fold it so that it covers. Further, the other end of the prepreg sheet has the first step portion 112a and the second step portion 112b of the closing member 112 and the inner cylinder so as to have a shape as shown in FIGS. 4 (a) and 5 (a). The member 160 is bent so as to cover the other end 160b. Here, when the resin used for the prepreg sheet is a thermosetting resin, the housing 110 is molded by thermosetting below the ignition point and below the melting point of the gas generating agent 130 and the ignition agent. Next, after fitting the ring-shaped member 114 to one end of the housing 110 and the ring-shaped member 113 to the other end of the housing 110, as in the first embodiment, the ring-shaped members 113 and 114 are centered from the circumferences of the respective members. Secure by caulking. After that, the gas ejection port 111 is formed by cutting or the like in accordance with the position of the opening 161 of the inner cylinder member 160 previously grasped.

(Main features of gas generator 200)
According to this embodiment, the same operational effects as those of the first embodiment can be achieved. Moreover, it can be used as the base at the time of forming the housing 110 using resin and a fiber bundle or a fiber thread, and the housing 110 can be formed easily. In addition, since the opening 161 corresponding to the position of the gas ejection port 111 of the housing 110 is provided in the inner cylinder member 160 in advance, the gas generated during operation can be reliably discharged.

  Furthermore, since the position of the opening 161 provided in the inner cylinder member 160 can be determined based on the position of the notch 162 or the notch 163, the housing 110 is molded around the inner cylinder member 160. Even after, the position of the opening 161 provided in the inner cylinder member 160 can be easily grasped. As a result, even after the housing 110 is molded, the gas outlet 111 of the housing 110 can be easily opened. Further, the position of the opening 161 of the inner cylinder member 160 is determined based on, for example, a relationship with the orientation of the two terminal pins 152 in advance, or the holder 120 or the closing member 112. It may be possible to make a determination based on a position reference formed in advance by marking the determined position in advance or by partially deforming (forming a recess or the like). .

  Further, even when the filter 140 may become hot during operation of the gas generator 200, the filter 140 and the housing 110 are prevented from coming into direct contact with each other, and the filter 110 when the temperature becomes high after operation causes the housing 110 to Burnout can be prevented. Further, since the opening 161 of the inner cylinder member 160 is formed with a space corresponding to the thickness of the inner cylinder member 160, the filter 140 may be damaged even when the gas outlet 111 is formed by cutting or the like from the outside. And can be reliably formed.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, what was shown in Drawing 2 (b)-(e) is mentioned as a modification in the other end of gas generator 100 of a 1st embodiment. More specifically, as shown in FIG. 2B, the end of the housing 72 covers only the first step portion 70a of the closing member 70 adjacent to the filter 73, and the ring-shaped member 71 and the first step. The end portion of the housing 72 may be sandwiched between the portion 70a. Moreover, in FIG.2 (b), the ring-shaped member 71 may be caulked and fixed to the 2nd step part 70b. Further, as a modification of FIG. 2B, the ring-shaped member 71 may not be provided.

  Further, as shown in FIG. 2C, the stepped portion of the blocking member 74 adjacent to the filter 77 is formed into a three-stage shape including a first step portion 74a, a second step portion 74b, and a third step portion 74c. The end of the housing 75 is covered between the closing member 74 and the ring-shaped member 76 that covers the side of the third step 74 c with the end of the housing 75 and has an internal shape that matches the external shape of the end of the housing 75. May be inserted. In FIG. 2C, the ring-shaped member 76 may be reduced in diameter toward the center of the closing member 74 and caulked and fixed to the end of the housing 75. In FIG. 2C, the stepped portion of the closing member 74 is a three-step shape of the first step portion 74a, the second step portion 74b, and the third step portion 74c. May be. In accordance with this, the inner shape of the ring-shaped member 76 may be four or more, and the end portion of the housing 75 may be sandwiched between the closing member 74.

  2D, only the edge 79c of the first step 79a of the closing member 79 adjacent to the filter 78 is covered with the end of the housing 80, and the second step 79b is covered with the housing 80. It is good also as a structure which an edge part does not contact. Further, as a modification of FIG. 2D, the second step portion 79b may not be provided.

  Further, as shown in FIG. 2E, an annular groove 82a may be formed on the side of the closing member 82 adjacent to the filter 81, and the annular groove 82a may be covered with the end of the housing 83.

  Moreover, you may deform | transform the one end part (holder periphery) side of the gas generator 100 of 1st Embodiment similarly to FIG.2 (b)-(e).

  Moreover, what was shown to FIG.5 (b)-(e) etc. are mentioned as a modification in the other end part of the gas generator 200 of 2nd Embodiment. More specifically, as shown in FIG. 5B, the end portion of the housing 72 covers only the first step portion 170a of the closing member 170 adjacent to the filter 173, and the ring-shaped member 171 and the first member The end portion of the housing 172 may be sandwiched between the step portion 170a and the other end portion 169b of the inner cylinder member 169. Here, the closing member 170 has a fitting portion 170c similar to the fitting portion 112c in the second embodiment. Moreover, in FIG.5 (b), the ring-shaped member 171 may be fixed by crimping to the 2nd step part 170b. Further, as a modification of FIG. 5B, the ring-shaped member 171 may not be provided.

  Further, as shown in FIG. 5C, the stepped portion of the blocking member 174 adjacent to the filter 177 is formed into a three-stage shape including a first step portion 174a, a second step portion 174b, and a third step portion 174c. A ring-shaped member 176 that covers the side of the three-step portion 174c with the end of the housing 175 and has an internal shape that matches the external shape of the end of the housing 175, and the other end of the closing member 174 and the inner cylinder member 168 The end portion of the housing 175 may be sandwiched between 168b. Here, the closing member 174 has a fitting portion 174d similar to the fitting portion 112c in the second embodiment. In FIG. 5C, the ring-shaped member 176 may be reduced in diameter toward the center of the closing member 174 and fixed to the end of the housing 175 by caulking. In FIG. 5C, the stepped portion of the closing member 174 has a three-step shape of the first step portion 174a, the second step portion 174b, and the third step portion 174c. May be. In accordance with this, the inner shape of the ring-shaped member 176 may be four or more, and the end of the housing 175 may be sandwiched between the closing member 174.

  As shown in FIG. 5D, only the edge 179c of the first step 179a of the closing member 179 adjacent to the filter 178 and the other end 167b of the inner cylinder member 167 are covered with the end of the housing 80, and the second The step portion 179b may be configured such that the end portion of the housing 180 does not contact the step portion 179b. Here, the closing member 179 has a fitting portion 179d similar to the fitting portion 112c in the second embodiment. Further, as a modification of FIG. 5D, the second step portion 179b may not be provided.

  As shown in FIG. 5E, an annular groove 182a is formed on the side of the closing member 182 adjacent to the filter 181 (a part of which is shown in a sectional view in FIG. 5E) to form an inner cylinder member. The other end 184b and the annular groove 182a in 184 may be covered with the end of the housing 183. Here, the closing member 182 has a fitting portion 182c similar to the fitting portion 112c in the second embodiment.

  In addition, you may deform | transform the one end part (holder circumference | surroundings) side of the gas generator 200 of 2nd Embodiment similarly to FIG.5 (b)-(e).

In the gas generator of each of the above-described embodiments, if necessary, a transfer agent (for example, BKNO ₃ (boron / potassium nitrate), THPP (titanium hydride. Potassium perchlorate) etc.) may be loaded.

  Moreover, although not shown in figure, in each said embodiment, you may provide a holder with the cup-shaped transfer charge accommodating member by which the said transfer charge is loaded inside so that the front-end | tip part of an igniter may be covered. Thereby, the heat energy by the flame which generate | occur | produces at the time of the action | operation of an igniter can be reliably transmitted to the bottom face vicinity of a cup member, and the bottom face of a cup member can be fractured | ruptured or fuse | melted more easily.

10, 72, 75, 80, 83, 110, 172, 175, 180, 183 Housing 10A Pre-preg sheet 11, 111 Gas outlet 12, 70, 74, 79, 82, 112, 170, 174, 179, 182 Closure member 12a, 20a, 70a, 74a, 79a, 112a, 120a, 170a, 174a, 179a First step portion 12b, 20b, 70b, 74b, 79b, 112b, 120b, 170b, 174b, 179b Second step portion 13, 14, 71, 76, 113, 114, 171, 176 Ring-shaped member 17, 117 Combustion chamber 18, 118 Filter chamber 20, 120 Holder 21 Hollow opening 30, 130 Gas generating agent 31, 131 Cup members 40, 73, 77, 78 81, 140, 173, 177, 178, 181 Filter 50, 1 0 igniter 52, 152 terminal pin 74c, 174c third step portion 79c, 179c edge portion 82a, 182a annular groove portion 100, 200 gas generator 112c, 120c, 170c, 174d, 179d, 182c fitting portion 160, 167, 168 , 169, 184 Inner cylinder member 160a One end 160b, 167b, 168b, 169b, 184b Other end 161 Opening 162, 163 Notch

Claims (8)

A working gas generation chamber in which a working gas is generated by burning a gas generating agent sealed in a cylindrical member; a filter chamber in which a filter through which the working gas generated in the working gas generation chamber passes; A long cylindrical housing containing
Igniting and containing the igniting agent, disposed at one end of the housing in the axial direction, rupturing or melting the cylindrical member in the combustion chamber, and igniting and burning the gas generating agent inside the cylindrical member Gas generating agent ignition means capable of
A closing member disposed at the other axial end of the housing;
With
The housing is made of a fiber reinforced member formed into a long cylindrical shape using a resin and a fiber bundle or fiber thread,
The filter chamber is located on the other end side in the axial direction of the housing from the working gas generation chamber,
The peripheral wall portion of the portion defining the filter chamber of the housing is provided with a plurality of gas ejection ports for ejecting the working gas that has passed through the filter to the outside.
At least the gas generating agent igniting means and the closing member are closed between the gas generating agent igniting means and one end of the housing and between the closing member and the other end of the housing. A gas generator characterized in that a part thereof is covered by both end portions of the housing, and the gas generating agent ignition means and the closing member are fixed to the housing. At least two stepped portions are formed at the outer end of the gas generating agent ignition means or the outer end of the closing member,
The gas generator according to claim 1, wherein an end portion of the housing covers a first step portion including at least the edge portion of the stepped portion.   The gas generator according to claim 1, wherein the gas ejection port is formed after the housing is molded. In the housing, an inner cylinder member that includes the working gas generation chamber and the filter chamber inside is further provided,
The gas generator according to any one of claims 1 to 3, wherein the inner cylinder member is provided with an opening corresponding to a position of the gas ejection port. Notches are formed at both ends in the axial direction of the inner cylinder member,
The gas generator according to claim 4, wherein the gas generating agent ignition means and the plug are provided with a fitting portion that fits into the notch portion.   The ring-shaped member which has a hole part fitted in the said step part as a center, and pinches | interposes the edge part of the said housing with the said step part is provided. The gas generator according to item.   The gas generator according to claim 6, wherein the ring-shaped member fitted to the stepped portion is fixed by caulking from the periphery toward the center. The resin used to mold the housing is a thermosetting resin;
The plasticization temperature in the case of using the curing temperature in the case of using the thermosetting resin is lower than the ignition point or lower than the melting point of the gas generating agent and the igniting agent. The gas generator according to item 1.

Images