JP3122259U - Gas generator - Google Patents

Abstract

The present invention provides a gas generator that can capture a combustion residue of a gas generant sufficiently while having a simple configuration, and is small and lightweight.
A gas generator 1001 forms a flow path with a hollow cylindrical member 2 having a combustion chamber 1 therein, an igniter 3, a gas generating agent 4 loaded in the combustion chamber 1. The flow path forming members 5 and 6, a flow path 7 (first flow path) through which the generated gas flows, a flow path 8, and a flow path 9 are provided. A recess 5 c is formed at a position facing the hole 2 d of the combustion chamber 1 in the flow path forming member 5 which is one of the members forming the flow path 7. The direction of the gas generated by ignition and its combustion residue changes while colliding with the walls of the flow paths 7 to 9, and each time the collision occurs, the gas combustion residue is cooled and solidified.
[Selection] Figure 1

Description

  The present invention relates to a gas generator for operating an occupant safety protection device such as an automobile airbag.

  Conventionally, the applicant has already applied for the following patent document 1 as a gas generator for airbags. Specifically, there are a main combustion chamber, a gas cooling chamber, and a sub-combustion chamber between these chambers, and means for putting the gas generating agent into the main combustion chamber and igniting the gas generating agent ( An igniter), and at least one baffle plate is disposed between the subcombustion chamber and the gas cooling chamber and / or in the subcombustion chamber, and the high temperature gas generated by the combustion of the gas generating agent is generated in the subcombustion chamber and the gas. Means for ejecting through the cooling chamber. The above baffle plate is provided between the auxiliary combustion chamber and / or the auxiliary combustion chamber and the gas cooling chamber in order to keep the combustion of the gas generating agent in a pressurized state ( 0014]).

Japanese Patent Laid-Open No. 5-96147

  Patent Document 1 includes (1) a gas cooling chamber filled with alumina or the like to increase the efficiency of capturing the combustion residue of the gas generant, and (2) means for catching the combustion residue separately from the baffle plate ( A large number of members are required to capture and filter the residual components, such as a catcher) and (3) means (filter) for filtering the residual components in the combustion gas. However, recently, to improve safety, the number of seat belt pretensioners and airbags provided in one vehicle has increased compared to before, so the number of gas generators mounted naturally has increased. As the weight increases, the mounting space for other parts has been reduced. Therefore, it is further desired to reduce the size and weight of the gas generator in order to improve fuel efficiency by reducing the weight of the vehicle and to secure a mounting space for other components.

  Therefore, the present invention can capture the combustion residue of the gas generating agent sufficiently while having a simple configuration that does not require the above-described members (1) to (3), and generates a small and lightweight gas. The purpose is to provide a vessel.

Means and effects for solving the problems

  The present invention for solving the above problems includes a combustion chamber that is filled with a gas generating agent and has a hole for ejecting gas when the gas generating agent burns, A gas generator comprising an igniter that ignites a gas generating agent, and a flow path through which gas flows when the gas generating agent burns, the filter having a main function of filtering residual components of the gas A member is not provided, and the flow path is connected to the hole outside the combustion chamber, and has a concave portion or a wave shape portion in the middle, and gas ejected from the hole Is formed in a zigzag shape from the center of the combustion chamber to the outside so as to change the flow direction of the gas three times or more in the middle, and the direction of the gas flow is changed in the concave portion or the wave shape portion. Formed at a position That is a gas generator.

  With the above configuration, when changing the direction in which the gas collides with the wall in the zigzag flow path, the combustion residue of the gas also collides with the wall, and the velocity of the combustion residue is reduced or stopped, cooled and solidified to the wall. In particular, since the wall of the portion where the gas and the combustion residue collide has a concave portion or a corrugated portion, (1) the contact area between the combustion residue and the wall is a flat wall. (2) The flow rate of gas and combustion residue can be reduced compared to the case of a flat wall, and the cooling time of the combustion residue can be lengthened. The amount of trapped combustion residue can be increased compared to a flat wall. Therefore, while having a simple configuration, the combustion residue of the gas generating agent can be sufficiently captured, and a smaller and lighter gas generator than that of Patent Document 1 can be provided.

  In the gas generator according to the present invention, a part of the flow path is formed of a flow path forming member having a concave portion or a corrugated portion, and forms the concave portion or the corrugated portion of the flow path forming member. The part which is carrying out has thickness rather than another part.

  With the above configuration, the heat capacity of the portion forming the concave portion or the wave shape portion can be increased, and the cooling ability of the combustion residue can be improved as compared with the case where the thickness is not excessive. Therefore, the total amount of captured combustion residues can be further increased.

  In the gas generator according to the present invention, it is preferable that the flow path includes a first flow path having a predetermined width and a gas reservoir portion connected to the first flow path and formed in a bag channel shape. The width here refers to a flow path width that is perpendicular to the gas flow direction in the first flow path and that extends from the center of the combustion chamber to the outside.

  According to the above configuration, since the gas ejected from the hole flows to the gas reservoir, the gas stays in the gas reservoir, and the cooling time of the combustion residue is prolonged, so the cooling capacity of the combustion residue is improved. The amount of combustion residue captured can be increased.

In the gas generator according to the present invention, it is preferable that the gas reservoir is formed at a position facing the hole and has a width wider than the width of the first flow path.
According to the said structure, the gas ejected from a hole becomes easy to flow to a gas reservoir part. As a result, the gas stays more in the gas reservoir, and the cooling time of the combustion residue becomes longer. Therefore, the cooling capacity of the combustion residue is further improved, so that the capture amount of the combustion residue can be further increased.

  In the gas generator of the present invention, it is preferable that a heat-resistant member is laid on the inner wall of the concave portion or the corrugated portion. Alternatively, a part of the gas reservoir is fixed to the outer wall of the combustion chamber, and is surrounded by the inner wall of the gas reservoir forming member forming a part of the flow path and the outer wall of the combustion chamber. The portion of the gas reservoir forming member that collides with the gas ejected from the hole of the combustion chamber is covered with a heat-resistant member that blocks the heat of the gas. Is preferred.

  Since the flow path and the gas reservoir forming member are exposed to a high-temperature gas, for example, there is a possibility that a hole may be formed due to melting or the like. However, this greatly increases the weight, but according to the present invention having the above configuration, the heat-resistant member eliminates the need to increase the thickness of the member, so that the hole can be opened without much increase in weight. Can be prevented.

  In the gas generator of the present invention, it is preferable that a heat radiating fin having a thermal conductivity of 99 W / m · K or more is provided on the outer wall of the concave portion. Alternatively, the gas reservoir portion is formed by being surrounded by the inner wall of the gas reservoir portion forming member whose outer wall is in contact with the outer space and the outer wall of the combustion chamber, and forming the gas reservoir portion. It is preferable that a heat radiation fin having a thermal conductivity of 99 W / m · K or more is provided on the outer wall of the member.

  According to the above configuration, since the fins remove heat from the flow path wall and the gas reservoir forming member, the gas and combustion residues that collide with the flow path wall and the gas reservoir forming member are reduced compared to the case without the fin. Cooling can be performed, and the amount of combustion residue captured can be further increased. In addition, since heat is taken away from the flow path wall and the gas reservoir forming member, for example, the situation where the flow channel wall and the gas reservoir forming member are melted by the heat of the gas and the hole is opened is prevented. it can.

  In the gas generator of the present invention, the gas reservoir portion has a tapered portion that becomes narrower toward the first flow path, and the tapered portion is a gas ejected from the hole of the combustion chamber. It is preferable that it is formed in the position which collides.

  According to the above configuration, convection is generated by the gas ejected from the hole colliding with the tapered portion that becomes narrower toward the first flow path, and the gas can easily reach the entire gas reservoir. As a result, gas retention is promoted in the gas reservoir, and the cooling time of the combustion residue is further increased, so that the cooling capacity of the combustion residue is further improved, so that the amount of combustion residue captured can be further increased. Can do.

In the gas generator of the present invention, the combustion chamber has a short hollow cylindrical shape having a plurality of the holes in the cylindrical portion, and the flow path is formed around the outer side of the cylindrical portion of the combustion chamber. Is preferred. Alternatively, the combustion chamber has a long hollow cylindrical shape in which the igniter is provided at one end in the axial direction and the hole is formed at the other end in the axial direction. It is preferable to be formed outside the other end in the axial direction.
According to the said structure, the gas generator which has the above-mentioned each effect can be provided reliably.

<First Embodiment>
A gas generator according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic sectional view showing a gas generator according to a first embodiment of the present invention.

  A gas generator 1001 according to this embodiment shown in FIG. 1 includes a hollow cylindrical member 2 having a combustion chamber 1 therein, an igniter 3, a gas generating agent 4 loaded in the combustion chamber 1, a flow Flow path forming members 5 and 6 for forming a path, a flow path 7 (first flow path) through which the generated gas flows, a flow path 8 and a flow path 9 are provided.

  The hollow cylindrical member 2 is formed of an upper lid portion 2a, a lower lid portion 2b, and a cylindrical portion 2c provided with both the upper lid portion 2a and the lower lid portion 2b at both ends. A plurality of holes 2d are formed in the cylindrical portion 2c in the circumferential direction. Further, a strip-shaped rupture member 201 is disposed in the cylindrical portion 2c along the inner side of the cylindrical portion where the hole 2d is located. The rupture member 201 seals the hole 2d, so that the inside of the combustion chamber 1 is It is a sealed space. Here, examples of the material of the rupture member 201 include steel materials such as iron, stainless steel, and aluminum, and films such as plastic. The thickness of the rupture member 201 varies depending on the strength of the material used, but is preferably in the range of 0.01 to 0.5 mm.

  The igniter 3 is fixed to the upper lid portion 2 a of the hollow cylindrical member 2.

  The flow path forming member 5 includes a ring-shaped bottom portion 5a formed so as to surround the side surface of the upper lid portion 2a of the hollow cylindrical member 2 and a curved surface of the cylindrical portion 2c of the hollow cylindrical member 2 with a predetermined width. And has a cylindrical portion 5b connected to the end of the bottom portion 5a. The cylinder part 5b is formed so as to have a recess 5c on the inner wall side at a position facing the hole 2d.

  The flow path forming member 6 includes a ring-shaped bottom portion 6a formed so as to surround the side surface of the lower lid portion 2b of the hollow cylindrical member 2, and a curved surface of the cylindrical portion 5b of the flow path forming member 5 and A cylindrical portion 6b is provided at a predetermined width and is connected to the end of the bottom portion 6a, and a ring flange 6c is provided with an inner peripheral portion connected to the end of the cylindrical portion 6b.

  The flow path 7 is a space between the outer wall of the cylinder part 2c and the inner wall of the cylinder part 5b. The flow path 8 communicates with the flow path 7 and is a space surrounded by the outer wall of the cylindrical portion 2c, the end of the cylindrical portion 5b, the bottom 6a, and the inner wall of the cylindrical portion 6b. The flow path 9 communicates with the flow path 8 and is a space between the outer wall of the cylindrical portion 5b and the inner wall of the cylindrical portion 6b.

  Next, the operation of the gas generator 1001 will be described. When it becomes necessary to generate and eject gas, first, the igniter 3 is operated, and the gas generating agent 4 is ignited and burned in the combustion chamber 1 to generate gas. As a result, the internal pressure of the combustion chamber 1 is increased by the combustion of the gas generating agent 4, the rupture member 201 is broken, and the gas is released from the hole 2d. Here, as shown in the example of the gas flow shown in FIG. 1 (arrows in FIG. 1), the generated gas is ejected from the hole 2d toward the flow path forming member 5 to form a flow path facing the hole 2d. It collides with the recess 5c of the member 5 for use and the direction of gas flow changes. At the same time, the combustion residue of the gas is also ejected from the hole 2d toward the flow path forming member 5 and collides with the recess 5c. Therefore, the speed of the combustion residue is reduced or a part of the combustion residue is stopped, and the combustion residue is cooled. Solidifies and adheres to the inner wall. Next, the gas and the remaining combustion residue flow through the flow paths 8 and 9, but also when passing through the flow paths 8 and 9, they collide with the bottom part 6 a and the cylinder part 6 b, respectively, and the gas flow direction. Changes, the speed of the combustion residue is further reduced or stopped, and this combustion residue is cooled and solidified and adheres to the bottom 6a and the cylinder 6b. The gas is released from the flow path 9 to the outside, but almost no combustion residue is released to the outside.

  According to the present embodiment, when the gas collides with the recess 5c and changes the flow direction, the combustion residue of the gas also collides with the wall, the velocity of the combustion residue is reduced or stopped, and is cooled and solidified to adhere to the wall. However, since the wall of the part where the gas and the combustion residue collide has the recess 5c, (1) the contact area between the combustion residue and the wall is increased as compared with the case of a flat wall. (2) The flow velocity of gas and combustion residue can be reduced compared to the case of a flat wall, and the cooling time of combustion residue can be lengthened. From these, the amount of captured combustion residue per collision location Can be increased compared to a planar wall. Therefore, although it is a simple structure, the combustion residue of the gas generating agent 4 can be sufficiently captured, and a small and lightweight gas generator 1001 can be provided.

<Modification of First Embodiment>
Next, the gas generator which concerns on the modification of 1st Embodiment of this invention is demonstrated using figures. FIG. 2 is a schematic cross-sectional view showing a gas generator according to a modification of the first embodiment of the present invention. In addition, in this modification, about the part (code | symbol 11-14, 16-19, 202) similar to 1st Embodiment, to the part of the code | symbol (code | symbol 1-4, 6-9, 201) of 1st Embodiment. Each of them is shown in order, and description of such similar parts may be omitted.

  A gas generator 1002 according to this modification shown in FIG. 2 uses the flow path forming member 15 in place of the flow path forming member 5 of the first embodiment, and thus the gas generator according to the first embodiment. Different from the vessel 1001. Specifically, the flow path forming member 15 is formed so that the thickness of the flow path forming member 15 in the portion where the concave portion 15c is formed is thicker than that in the portion where the concave portion 15c is not formed. And the flow path forming member 5 of the first embodiment are different.

  According to this modification, the same function and effect as in the first embodiment can be obtained, and the heat capacity can be increased in the portion where the recess 15c is formed, compared to the recess 5c in the first embodiment. Compared with the case where it does not have extra, the cooling capacity of the combustion residue can be improved. Therefore, the total amount of captured combustion residues can be further increased.

Second Embodiment
Next, the gas generator which concerns on 2nd Embodiment of this invention is demonstrated using figures. FIG. 3 is a schematic cross-sectional view showing a gas generator according to a second embodiment of the present invention. In the present embodiment, the same portions (reference numerals 21 to 29, 203) as in the first embodiment are shown in order to match the reference numerals (reference numerals 1 to 9, 201) of the first embodiment, respectively. The description of the similar part may be omitted.

  The gas generator 1003 according to this embodiment shown in FIG. 2 is the first embodiment in that the heat dissipating fins 30 are provided on the outer wall of the portion where the recess 25c of the flow path forming member 25 is formed. It differs from the gas generator 1001 concerning.

  The fin 30 is a ring-shaped member made of a material having a conductivity of 99 W / m · K or more. Examples of the material include a metal having good thermal conductivity such as iron, aluminum, and copper.

  Next, the operation of the gas generator 1003 will be described. When it becomes necessary to generate and eject gas, first, the igniter 23 is operated, and the gas generating agent 24 is ignited and burned in the combustion chamber 21 to generate gas. Thereby, the internal pressure of the combustion chamber 21 is increased by the combustion of the gas generating agent 24, the rupture member 203 is broken, and the gas is released from the hole 22d. Here, as shown in the example of the gas flow shown in FIG. 3 (arrows in FIG. 3), the generated gas is ejected from the hole 22d toward the flow path forming member 25 to form a flow path facing the hole 22d. It collides with the concave portion 25c of the working member 25, and the direction of gas flow changes. At the same time, the combustion residue of the gas is also ejected from the hole 22d to the flow path forming member 25 side and collides with the recess 25c, so that the speed of the combustion residue is reduced or a part of the combustion residue is stopped. Solidifies and adheres to the inner wall. At this time, since the fin 30 removes heat from the flow path forming member 25, the gas and the combustion residue are further cooled and the combustion residue is further solidified as compared with the first embodiment. Next, the gas and the remaining combustion residue pass through the flow passage 27 and flow through the flow passages 28 and 29. When passing through the flow passages 28 and 29, they collide with the bottom portion 26a and the cylindrical portion 26b, respectively. As the gas flow direction changes, the speed of the combustion residue further decreases or stops, and this combustion residue is cooled and solidified and adheres to the bottom portion 26a and the cylinder portion 26b. The gas is released from the flow path 29 to the outside, but almost no combustion residue is released to the outside.

  According to the present embodiment, the same effect as that of the first embodiment is obtained, and the fin 30 takes heat away from the flow path forming member 25 having the recess 25c. In comparison, the gas and the combustion residue that collide with the recess 25c can be cooled, and the capture amount of the combustion residue can be further increased. In addition, since the heat is taken from the recess 25c, it is possible to prevent the recess 25c from being melted by the heat of the gas and opening a hole.

<Third Embodiment>
A gas generator according to a third embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a schematic cross-sectional view showing a gas generator according to a third embodiment of the present invention. In the present embodiment, the same parts (reference numerals 31 to 39, 204) as those in the first embodiment are shown in order to match the reference numerals (reference numerals 1 to 9, 201) of the first embodiment. The description of the similar part may be omitted.

  The gas generator 1004 according to this embodiment shown in FIG. 4 is the same as that of the first embodiment in that the heat-resistant member 40 is provided on the inner wall of the portion where the recess 35c of the flow path forming member 35 is formed. It differs from the gas generator 1001 which concerns.

The heat-resistant member 40 is a member made of silicide ceramics such as TiSi ₂ , CrSi ₂ , MoSi _2, or Cr-based ceramics such as CrB or CrSi ₂ . The heat-resistant member is mainly formed by spraying on a portion to be formed, but the forming method is not limited to this.

  Next, the operation of the gas generator 1004 will be described. When it is necessary to generate and eject gas, first, the igniter 33 is operated, and the gas generating agent 34 is ignited and burned in the combustion chamber 31 to generate gas. Thereby, the internal pressure of the combustion chamber 31 is increased by the combustion of the gas generating agent 34, the rupture member 204 is broken, and the gas is released from the hole 32d. Here, as shown in the example of the gas flow shown in FIG. 4 (arrows in FIG. 4), the generated gas is ejected from the hole 32d toward the flow path forming member 35 to form a flow path facing the hole 32d. It collides with the heat-resistant member 40 covering the recess 35c of the working member 35, and the direction of gas flow changes. At the same time, the combustion residue of the gas is ejected from the hole 32d toward the flow path forming member 35 and collides with the heat-resistant member 40, so that the speed of the combustion residue is reduced or a part of the combustion residue is stopped and the combustion residue is removed. It cools and solidifies and adheres to the inner wall. Next, the gas and the remaining combustion residue pass through the flow path 37 and flow through the flow paths 38 and 39, but also collide with the bottom portion 36a and the cylindrical portion 36b when passing through the flow paths 38 and 39, respectively. Then, as the gas flow direction changes, the speed of the combustion residue further decreases or stops, and this combustion residue is cooled and solidified and adheres to the bottom portion 36a and the cylindrical portion 36b. The gas is released from the flow path 39 to the outside, but almost no combustion residue is released to the outside.

  According to the present embodiment, the same effects as those of the first embodiment can be obtained. Further, in the recess 35c, if there is no heat-resistant member 40, it is exposed to a high-temperature gas and there is a possibility that a hole may be formed due to dissolution or the like. Therefore, it is necessary to form the flow path forming member 35 thick only in the recess 35c. Yes, it becomes heavy. However, in this embodiment, since the heat-resistant member 40 that covers the concave portion 35c is provided, it is not necessary to increase the thickness of the flow path forming member 35, so that a hole is prevented from being opened without much increase in weight. it can.

<Fourth embodiment>
A gas generator according to a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a schematic sectional view showing a gas generator according to a fourth embodiment of the present invention. In addition, in this embodiment, about the part (code | symbol 41-44, 46-49, 205) similar to 1st Embodiment, to the part of the code | symbol (code | symbol 1-4, 6-9, 201) of 1st Embodiment. Each of them is shown in order, and description of such similar parts may be omitted.

  The gas generator 1005 according to the present embodiment shown in FIG. 5 uses the flow path forming member 45 instead of the flow path forming member 5 of the first embodiment, and thus the gas generator according to the first embodiment. Different from the vessel 1001.

  The flow path forming member 45 includes a ring-shaped bottom portion 45a formed so as to surround the side surface of the upper lid portion 42a of the hollow cylindrical member 42, and a curved surface of the cylindrical portion 42c of the hollow cylindrical member 42 with a predetermined width. And has a cylindrical portion 45b continuously provided at the end of the bottom portion 45a. The cylindrical portion 45b is formed so as to have a corrugated portion 45c in the vicinity of a position facing the hole 42d.

  Next, the operation of the gas generator 1005 will be described. When it is necessary to generate and eject gas, first, the igniter 43 is operated, and the gas generating agent 44 is ignited and burned in the combustion chamber 41 to generate gas. Thereby, the internal pressure of the combustion chamber 41 is increased by the combustion of the gas generating agent 44, the rupture member 205 is broken, and the gas is released from the hole 42d. Here, as shown in the example of the gas flow shown in FIG. 5 (arrows in FIG. 5), the generated gas is ejected from the hole 42d toward the flow path forming member 45 to form a flow path facing the hole 42d. It collides with the corrugated portion 45c of the member 45, and the direction of gas flow changes. At the same time, the combustion residue of the gas is ejected from the hole 42d toward the flow path forming member 45 and collides with the corrugated portion 45c. Therefore, the speed of the combustion residue is reduced or a part of the combustion residue is stopped and the combustion residue is cooled.・ Solidify and adhere to the inner wall. Next, the gas and the remaining combustion residue flow through the flow paths 48 and 49. When passing through the flow paths 48 and 49, the gas and the remaining combustion residue collide with the bottom 46a and the cylindrical part 46b, respectively, so that the gas flows. Change, the speed of the combustion residue is further reduced or stopped, and this combustion residue is cooled and solidified and adheres to the bottom 46a and the cylinder 46b. And although gas is discharged | emitted from the flow path 49 outside, a combustion residue is hardly discharge | released outside.

  According to the present embodiment, the same effects as those of the first embodiment can be obtained.

<Fifth Embodiment>
A gas generator according to a fifth embodiment of the present invention will be described with reference to the drawings. FIG. 6 is a schematic cross-sectional view showing a gas generator according to a fifth embodiment of the present invention. In the present embodiment, the same portions (reference numerals 51 to 59, 206) as those in the fourth embodiment are shown in order to match the reference numerals (reference numerals 41 to 49, 201) of the fourth embodiment. The description of the similar part may be omitted.

  The gas generator 1006 according to this embodiment shown in FIG. 6 is the fourth embodiment in that the heat-resistant member 60 is provided on the inner wall of the portion where the corrugated portion 55c of the flow path forming member 55 is formed. It differs from the gas generator 1005 concerning. The heat resistant member 60 is made of the same material as the heat resistant member 40 in the third embodiment.

  Next, the operation of the gas generator 1006 will be described. When it becomes necessary to generate and eject gas, first, the igniter 53 is operated, and the gas generating agent 54 is ignited and burned in the combustion chamber 51 to generate gas. As a result, the internal pressure of the combustion chamber 51 is increased by the combustion of the gas generating agent 54, the rupture member 206 is broken, and the gas is released from the hole 52d. Here, as shown in the example of the gas flow shown in FIG. 6 (arrows in FIG. 6), the generated gas is ejected from the hole 52d toward the flow path forming member 55 to form a flow path facing the hole 52d. It collides with the heat-resistant member 60 covering the corrugated portion 55c of the working member 55, and the gas flowing direction changes. At the same time, the combustion residue of the gas is ejected from the hole 52d toward the flow path forming member 55 and collides with the heat-resistant member 60, so that the speed of the combustion residue is reduced or a part of the combustion residue is stopped. It cools and solidifies and adheres to the inner wall. Next, the gas and the remaining combustion residue flow through the flow paths 58 and 59. When passing through the flow paths 58 and 59, the gas and the remaining combustion residue collide with the bottom portion 56a and the cylindrical portion 56b, respectively. Change, the speed of the combustion residue is further reduced or stopped, and this combustion residue is cooled and solidified and adheres to the bottom portion 56a and the cylindrical portion 56b. The gas is released from the flow path 59 to the outside, but almost no combustion residue is released to the outside.

  According to the present embodiment, the same effects as those of the first embodiment can be obtained.

<Sixth Embodiment>
A gas generator according to a sixth embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a schematic sectional view showing a gas generator according to a sixth embodiment of the present invention. In addition, in this embodiment, about the part (code | symbols 61-64, 66-69, 207) similar to 1st Embodiment, to the part of the code | symbol (code | symbol 1-4, 6-9, 201) of 1st Embodiment. Each of them is shown in order, and description of such similar parts may be omitted.

  The gas generator 1007 according to the present embodiment shown in FIG. 7 has a gas reservoir 70 formed by using a gas reservoir forming member 65 instead of the flow path forming member 5 of the first embodiment. Thus, it is different from the gas generator 1001 according to the first embodiment.

  The gas reservoir forming member 65 includes a ring-shaped bottom portion 65a formed so as to surround the side surface of the upper lid portion 62a of the hollow cylindrical member 62, and a curved surface of the cylindrical portion 62c of the hollow cylindrical member 62. A cylindrical portion 65b that is open at a width (larger than the width of a cylindrical portion 65d described later), is formed in a tapered shape so that an inner wall gradually approaches the cylindrical portion 65b, and a cylindrical portion 65b that is connected to the end of the bottom portion 65a. A cylindrical tube 65c continuously provided at the end of 65b, and a cylinder provided continuously with the end of the tapered cylindrical portion 65c along the curved surface of the cylindrical portion 62c of the hollow cylindrical member 62 with a predetermined width. Part 65d. Further, the tapered cylindrical portion 65 c has a concave portion 65 e formed at a position facing the outlet of the hole 62 d of the cylindrical portion 62 c of the hollow cylindrical member 62. Also, ring-shaped fins 65f for heat radiation similar to the fins 30 of the second embodiment are fixedly provided on the outer surface of the bottom portion 65a, the outer surface of the cylindrical portion 65b, and the outer surface of the tapered cylindrical portion 65c.

  Next, the operation of the gas generator 1007 will be described. When it is necessary to generate and eject gas, first, the igniter 63 is operated, and the gas generating agent 64 is ignited and burned in the combustion chamber 61 to generate gas. As a result, the internal pressure of the combustion chamber 61 is increased by the combustion of the gas generating agent 64, the rupture member 207 is broken, and the gas is released from the hole 62d. Here, as shown in the example of the gas flow shown in FIG. 7 (arrows in FIG. 7), the generated gas is ejected from the hole 62d into the gas reservoir 70 and is used to form the gas reservoir facing the hole 62d. It collides with the concave portion 65e of the tapered cylindrical portion 65c of the member 65, the direction of gas flow changes, and convection or stays in the gas reservoir 70. At the same time, the combustion residue of the gas is ejected from the hole 62d into the gas reservoir 70 and collides with the concave portion 65e of the tapered cylindrical portion 65c. The speed is reduced or a part of the combustion residue is easily stopped, and the combustion residue is cooled and solidified to adhere to the inner wall. Next, the gas and the remaining combustion residue flow out to the flow path 67 and further flow through the flow paths 68 and 69. When passing through these flow paths 67 to 69, the bottom 66a and the cylindrical portion 66b are also passed. Each of them collides to change the direction of gas flow, and the speed of the combustion residue is further reduced or stopped. This combustion residue is cooled and solidified and adheres to the bottom 66a and the cylinder 66b. The gas is released from the flow path 69 to the outside, but almost no combustion residue is released to the outside.

  According to the present embodiment, the same effects as those of the first embodiment can be obtained. Further, convection is generated when the gas and combustion residue ejected from the hole 62 d collide with the tapered portion that becomes narrower toward the flow path 67, and the gas and the combustion residue are easily spread over the entire gas reservoir 70. As a result, the retention of gas and combustion residue is promoted in the gas reservoir 70, and the cooling capacity of the combustion residue is further improved, so that the amount of captured combustion residue can be further increased.

  Furthermore, since the fin 65f takes heat away from the gas reservoir forming member 65, the gas and combustion residue colliding with the recess 65e can be cooled and the amount of combustion residue captured can be increased more than when the fin 65f is not provided. it can. Further, since the heat is taken from the gas reservoir forming member 65, it is possible to prevent the gas reservoir forming member 65 from being melted by the heat of the gas and opening a hole.

<Seventh embodiment>
A gas generator according to a seventh embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a schematic cross-sectional view showing a gas generator according to a seventh embodiment of the present invention. In addition, in this embodiment, about the part (code | symbols 71-74, 76-79, 208) similar to 1st Embodiment, to the part of the code | symbol (code | symbol 1-4, 6-9, 201) of 1st Embodiment. Each of them is shown in order, and description of such similar parts may be omitted.

  The gas generator 1008 according to the present embodiment shown in FIG. 8 has a gas reservoir 80 formed using a gas reservoir forming member 75 instead of the flow path forming member 5 of the first embodiment. Thus, it is different from the gas generator 1001 according to the first embodiment.

  The gas reservoir portion forming member 75 is formed along a ring-shaped bottom portion 75a formed so as to surround the side surface of the upper lid portion 72a of the hollow cylindrical member 72, and the curved surface of the cylindrical portion 72c of the hollow cylindrical member 72 and a predetermined amount. A cylindrical portion 75b that is wider than the width of a cylindrical portion 75d, which will be described later, is formed in a tapered shape so that the inner wall gradually approaches the cylindrical portion 75b. A cylindrical tube portion 75c continuously provided at the end of 75b, and a tube provided continuously with the end portion of the tapered cylindrical portion 75c along the curved surface of the cylindrical portion 72c of the hollow columnar member 72 with a predetermined width. Part 75d. The tapered cylindrical portion 75 c has a corrugated portion 75 e formed at a position facing the outlet of the hole 72 d of the cylindrical portion 72 c of the hollow cylindrical member 72. In addition, ring-shaped fins 75f for heat dissipation similar to the fins 30 of the second embodiment are fixedly provided on the outer surface of the upper lid portion 72a and the outer surface of the cylindrical portion 75b.

  Next, the operation of the gas generator 1008 will be described. When it is necessary to generate and eject gas, first, the igniter 73 is operated, and the gas generating agent 74 is ignited in the combustion chamber 71 and burned to generate gas. As a result, the internal pressure of the combustion chamber 71 is increased by the combustion of the gas generating agent 74, the rupture member 208 is broken, and the gas is released from the hole 72d. Here, as shown in the example of the gas flow shown in FIG. 8 (arrows in FIG. 8), the generated gas is ejected from the hole 72d into the gas reservoir 80 and is used for forming the gas reservoir facing the hole 72d. Colliding with the corrugated portion 75e of the tapered cylindrical portion 75c of the member 75, the direction of gas flow changes, and convection or stay in the gas reservoir 80. At the same time, the combustion residue of the gas is also ejected from the hole 72d into the gas reservoir 80, collides with the corrugated portion 75e, and then convects or stays in the gas reservoir 80. Part of the residue is likely to stop, and the combustion residue is cooled and solidified to adhere to the inner wall. Next, the gas and the remaining combustion residue flow into the flow path 77 and further flow through the flow paths 78 and 79. When passing through these flow paths 77 to 79, the bottom 76a and the cylinder portion 76b Each of them collides, the direction of gas flow changes, and the speed of the combustion residue is further reduced or stopped. This combustion residue is cooled and solidified and adheres to the bottom portion 76a and the cylinder portion 76b. The gas is released from the flow path 79 to the outside, but almost no combustion residue is released to the outside.

  According to the present embodiment, the same effects as those of the first embodiment can be obtained. Further, convection is generated when the gas and combustion residue ejected from the hole 72d collide with a tapered portion that narrows toward the flow path 77, and the gas and combustion residue are easily spread over the entire gas reservoir 80. As a result, the retention of gas and combustion residue is promoted in the gas reservoir 80, and the cooling capacity of the combustion residue is further improved, so that the amount of captured combustion residue can be further increased.

  Furthermore, since the fins 75f take heat away from the gas reservoir forming member 75, the gas and combustion residue colliding with the corrugated part 75e can be cooled and the amount of captured combustion residues can be increased more than when the fins 75f are not provided. Can do. Further, since the heat is taken from the gas reservoir forming member 75, it is possible to prevent the gas reservoir forming member 75 from being melted by the heat of the gas and opening a hole.

<Eighth Embodiment>
A gas generator according to an eighth embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a schematic cross-sectional view showing a gas generator according to an eighth embodiment of the present invention. In addition, in this embodiment, about the part (code | symbol 81-84, 86-89, 209) similar to 1st Embodiment, to the part of the code | symbol (code | symbol 1-4, 6-9, 201) of 1st Embodiment. Each of them is shown in order, and description of such similar parts may be omitted.

  The gas generator 1009 according to this embodiment shown in FIG. 9 has a gas reservoir 90 formed by using a gas reservoir forming member 85 instead of the flow path forming member 5 of the first embodiment. Thus, the gas generator 1001 according to the first embodiment and the gas generator 1007 according to the sixth embodiment are different.

  The gas reservoir forming member 85 includes a ring-shaped bottom portion 85a formed so as to surround the side surface of the upper lid portion 82a of the hollow cylindrical member 82, and a curved surface of the cylindrical portion 82c of the hollow cylindrical member 82. A cylindrical portion 85b having a width (larger than the width of a cylindrical portion 85d to be described later) and tapered so that the inner wall gradually approaches the cylindrical portion 85b and a cylindrical portion 85b continuously provided at the end of the bottom portion 85a. A cylindrical tube 85c continuously provided at the end of 85b, and a cylindrical tube 82c provided along the curved surface of the cylindrical portion 82c of the hollow cylindrical member 82 and having a predetermined width, which are continuously provided at the end of the tapered cylindrical portion 85c. Part 85d. The tapered cylindrical portion 85 c has a concave portion 85 e formed at a position facing the outlet of the hole 82 d of the cylindrical portion 82 c of the hollow cylindrical member 82. Further, the inner surface of the tapered cylindrical portion 85c is coated with a heat-resistant member 85f similar to the heat-resistant member 40 of the third embodiment.

  Next, the operation of the gas generator 1009 will be described. When it is necessary to generate and eject gas, first, the igniter 83 is operated, and the gas generating agent 84 is ignited in the combustion chamber 81 and burned to generate gas. Thereby, the internal pressure of the combustion chamber 81 is increased by the combustion of the gas generating agent 84, the rupture member 209 is broken, and the gas is released from the hole 82d. Here, as shown in the example of the gas flow shown in FIG. 9 (arrows in FIG. 9), the generated gas is ejected from the hole 82d into the gas reservoir 90 and is used for forming the gas reservoir facing the hole 82d. It collides with the heat-resistant member 85f covering the concave portion 85e of the tapered cylindrical portion 85c of the member 85, the direction of gas flow changes, and convection or stays in the gas reservoir 90. At the same time, the combustion residue of the gas is ejected from the hole 82d into the gas reservoir 90, and after colliding with the heat-resistant member 85f, similarly, convection or residence in the gas reservoir 90 is caused. A part of the combustion residue is easily stopped, and the combustion residue is cooled and solidified and adheres to the inner wall. Next, the gas and the remaining combustion residue flow into the flow path 87 and further flow through the flow paths 88 and 89, but also when passing through these flow paths 87 to 89, the bottom 86a and the cylinder portion 86b. Each of them collides, the direction of gas flow changes, and the speed of the combustion residue is further reduced or stopped. This combustion residue is cooled and solidified and adheres to the bottom portion 86a and the cylinder portion 86b. The gas is released from the flow path 89 to the outside, but almost no combustion residue is released to the outside.

  According to the present embodiment, the same effects as those of the first embodiment can be obtained. Further, convection is generated when the gas and combustion residue ejected from the hole 82 d collide with the tapered portion that narrows toward the flow path 87, and the gas and combustion residue are easily spread over the entire gas reservoir 90. As a result, the retention of gas and combustion residue is promoted in the gas reservoir 90, and the cooling capacity of the combustion residue is further improved, so that the amount of captured combustion residue can be further increased.

  Further, as in the third embodiment, since the heat-resistant member 85f that covers the recess 85e is provided, it is not necessary to increase the thickness of the flow path forming member 85, so that a hole is opened without much increase in weight. Can be prevented.

<Ninth Embodiment>
A gas generator according to a ninth embodiment of the present invention will be described with reference to the drawings. FIG. 10 is a schematic cross-sectional view showing a gas generator according to a ninth embodiment of the present invention. In addition, in this embodiment, about the part (code | symbol 91-94, 96-99, 210) similar to 1st Embodiment, to the part of the code | symbol (code | symbol 1-4, 6-9, 201) of 1st Embodiment. Each of them is shown in order, and description of such similar parts may be omitted.

  The gas generator 1010 according to this embodiment shown in FIG. 10 has a gas reservoir 100 formed by using a gas reservoir forming member 95 instead of the flow path forming member 5 of the first embodiment. Thus, the gas generator 1001 according to the first embodiment and the gas generator 1008 according to the seventh embodiment are different.

  The gas reservoir forming member 95 includes a ring-shaped bottom portion 95a formed so as to surround the side surface of the upper lid portion 92a of the hollow cylindrical member 92, and a curved surface of the cylindrical portion 92c of the hollow cylindrical member 92. A cylindrical portion 95b that is open at a width (larger than the width of a cylindrical portion 95d to be described later), is formed in a tapered shape so that the inner wall gradually approaches the cylindrical portion 95b. A cylindrical tube portion 95c continuously provided at the end portion 95b, and a cylinder provided continuously to the end portion of the tapered cylindrical portion 95c along the curved surface of the cylindrical portion 92c of the hollow cylindrical member 92 and with a predetermined width. Part 95d. In addition, the tapered cylindrical portion 95 c has a corrugated portion 95 e formed at a position facing the exit of the hole 92 d of the cylindrical portion 92 c of the hollow cylindrical member 92. Further, a heat-resistant member 95f similar to the heat-resistant member 40 of the third embodiment is coated on the inner side of the tapered cylindrical portion 95c.

  Next, the operation of the gas generator 1010 will be described. When it is necessary to generate and eject gas, first, the igniter 93 is operated, and the gas generating agent 94 is ignited and burned in the combustion chamber 91 to generate gas. As a result, the internal pressure of the combustion chamber 91 is increased by the combustion of the gas generating agent 94, the rupture member 210 is broken, and the gas is released from the hole 92d. Here, as shown in the example of the gas flow shown in FIG. 10 (arrows in FIG. 10), the generated gas is ejected from the hole 92d into the gas reservoir 100 and is used to form the gas reservoir facing the hole 92d. It collides with the heat-resistant member 95f covering the corrugated portion 95e of the tapered cylindrical portion 95c of the member 95, the direction of gas flow changes, and convects or stays in the gas reservoir portion 100. At the same time, the combustion residue of the gas is jetted into the gas reservoir 100 from the hole 92d and collides with the heat-resistant member 95f, and thereafter convects or stays in the gas reservoir 100, so that the speed of the combustion residue is reduced or reduced. A part of the combustion residue is easily stopped, and the combustion residue is cooled and solidified and adheres to the inner wall. Next, the gas and the remaining combustion residue flow into the flow path 97 and further flow through the flow paths 98 and 99. When passing through these flow paths 97 to 99, the bottom 96a and the cylinder portion 96b also enter. Each of them collides, the direction of gas flow changes, and the speed of the combustion residue is further reduced or stopped. This combustion residue is cooled and solidified and adheres to the bottom portion 96a and the cylinder portion 96b. The gas is released from the flow path 99 to the outside, but almost no combustion residue is released to the outside.

  According to the present embodiment, the same effects as those of the first embodiment can be obtained. Further, convection is generated when the gas and combustion residue ejected from the hole 92d collide with a tapered portion that becomes narrower toward the flow path 97, and the gas and combustion residue easily spread over the entire gas reservoir 100. As a result, the retention of gas and combustion residue is promoted in the gas reservoir 100, and the cooling capacity of the combustion residue is further improved, so that the amount of captured combustion residue can be further increased.

  Further, as in the third embodiment, since the heat-resistant member 95f covering the corrugated portion 95e is provided, it is not necessary to increase the thickness of the flow path forming member 95, so that a hole is opened without much increase in weight. Can be prevented.

<Tenth Embodiment>
Next, a gas generator according to a tenth embodiment of the present invention will be described with reference to the drawings. FIG. 11 is a schematic sectional view showing a gas generator according to a tenth embodiment of the present invention.

  A gas generator 1011 according to this embodiment shown in FIG. 11 includes a hollow cylindrical member 102 having a combustion chamber 101 therein, an igniter 103, a gas generating agent 104 loaded in the combustion chamber 101, and a flow. Cylindrical flow path forming members 106 and 107 for forming a path, a flow path 108 through which the generated gas flows, a flow path 109 (first flow path), and a flow path 110 are provided.

  The hollow cylindrical member 102 is formed of an upper lid portion 102a, a lower lid portion 102b, and a cylindrical portion 102c in which the upper lid portion 102a and the lower lid portion 102b are provided at both ends. A plurality of holes 102d are formed in the cylindrical portion 102c in the circumferential direction in the vicinity of the lower lid portion 102b on the side surface.

  The combustion chamber 101 is composed of a space surrounded by an upper lid portion 102a, a cylindrical portion 102c, and a disk-shaped partition member 111. The partition member 111 has a hole 111a for ejecting gas at the center. Moreover, the rupture member 211 is arrange | positioned inside the partition member 111 in which the hole 111a is located, and the inside of the combustion chamber 101 becomes the airtight space because the rupture member 211 seals the hole 111a. . As a modification, the rupture member may be arranged inside the hole 102d instead of the hole 111a.

  The igniter 103 is fixed to the upper lid portion 102a.

  The flow path forming member 106 is a cylindrical member having a diameter smaller than the diameter of the flow path forming member 107, and is connected to the partition member 111 in a state where one end is connected to the hole 111 a from which gas is ejected from the combustion chamber 101. The other end is fixed to the lower lid portion 102b. A plurality of holes 106 a are formed in the circumferential direction on the side surface near the other end of the flow path forming member 106.

  The flow path forming member 107 is a cylindrical member that has the same central axis as the flow path forming member 106 and is provided outside the flow path forming member 106, and has one end fixed to the partition member 111. The other end is fixed to the lower lid portion 102b. A plurality of holes 107a are formed in the circumferential direction on the side surface in the vicinity of the partition member 111 of the flow path forming member 107, and a recess 107b is formed at a position facing the hole 106a.

  The flow path 108 is an internal space portion of the flow path forming member 106, and the flow path 109 is a space portion between the flow path forming member 106 and the flow path forming member 107. The flow path 110 is a space portion between the flow path forming member 107 and the cylindrical portion 102 c of the hollow cylindrical member 102.

  Next, the operation of the gas generator 1011 will be described. When it is necessary to generate and eject gas, first, the igniter 103 is activated, and the gas generating agent 104 is ignited and burned in the combustion chamber 101 to generate gas. As a result, the internal pressure of the combustion chamber 101 increases due to the combustion of the gas generating agent 104, the rupture member 211 is broken, and the gas is released from the hole 111a. Here, as shown in the example of the gas flow shown in FIG. 11 (arrow in FIG. 11), the generated gas is ejected from the hole 111a to the flow path 108, and the inner wall of the lower lid portion 102b at the end of the flow path 108 The gas is ejected from the hole 106a to the flow path 109. At the same time, the combustion residue of the gas is also ejected from the hole 111a to the flow path 108 and collides with the inner wall of the lower lid portion 102b at the end of the flow path 108, so that the speed of the combustion residue is reduced or a part of the combustion residue is stopped. The combustion residue is cooled and solidified and adheres to the vicinity of the inner wall of the lower lid portion 102b, and the combustion residue that does not adhere is ejected from the hole 106a to the flow path 109. Next, the gas and the remaining combustion residue flow through the flow path 109. Similarly, the gas and the remaining combustion residue collide with the inner wall of the partition member 111, the gas flowing direction is changed, and the speed of the combustion residue is further reduced or stopped, The combustion residue is cooled and solidified and adheres to the vicinity of the inner wall of the partition member 111, and the gas and the combustion residue that has not adhered are ejected from the hole 117a to the flow path 110. Further, after gas and combustion residue flow through the flow path 110, they collide with the outer wall of the recess 107b and the inner wall of the lower lid portion 102b again. Although the gas is released to the outside from the hole 102d, the combustion residue is cooled and solidified here, so that it adheres to the vicinity of the inner wall of the lower lid portion 102b and is hardly released to the outside.

  According to the present embodiment, the same effects as those of the first embodiment can be obtained.

<Eleventh embodiment>
Next, a gas generator according to an eleventh embodiment of the present invention will be described with reference to the drawings. FIG. 12 is a schematic cross-sectional view showing a gas generator according to an eleventh embodiment of the present invention. In addition, in this embodiment, about the part (code | symbol 121-126, 128-131, 212) similar to 10th Embodiment, it is the part of the code | symbol (code | symbol 101-106, 108-111, 211) of 10th Embodiment. Each of them is shown in order, and description of such similar parts may be omitted.

  The gas generator 1012 according to the present embodiment shown in FIG. 12 uses the flow path forming member 127 instead of the flow path forming member 107 of the tenth embodiment, and thus the gas generator according to the tenth embodiment. Different from the vessel 1011.

  The flow path forming member 127 is a cylindrical member that has the same central axis as the flow path forming member 126 and is provided outside the flow path forming member 126, and has one end fixed to the partition member 131. The other end is fixed to the lower lid portion 122b. A plurality of holes 127a are formed on the side surface of the flow path forming member 127 in the vicinity of the partition member 131, and a corrugated portion 127b is formed at a position facing the hole 126a.

  Next, the operation of the gas generator 1012 will be described. When it is necessary to generate / inject gas, first, the igniter 123 is operated, and the gas generating agent 124 is ignited in the combustion chamber 121 and burned to generate gas. As a result, the internal pressure of the combustion chamber 121 is increased by the combustion of the gas generating agent 124, the rupture member 212 is broken, and the gas is released from the hole 131a. Here, as shown in the example of the gas flow shown in FIG. 12 (arrows in FIG. 12), the generated gas is ejected from the hole 131a into the flow path 128, and the inner wall of the lower lid portion 122b at the end of the flow path 128 And the gas is ejected from the hole 126a to the flow path 129 side. At the same time, the combustion residue of the gas is also ejected from the hole 131a to the flow path 128 and collides with the inner wall of the lower lid portion 122b at the end of the flow path 128, so that the speed of the combustion residue is reduced or a part of the combustion residue is stopped. The combustion residue is cooled and solidified and adheres to the vicinity of the inner wall of the lower lid portion 122b, and the combustion residue that does not adhere is ejected from the hole 126a to the flow path 129 side. The gas and the combustion residue that has not adhered are ejected toward the flow path 129 and then collide with the corrugated portion 127b of the flow path forming member 127, and the combustion residue is cooled and solidified to adhere to the inner wall. Next, it collides with the inner wall of the partition member 131 and the direction of gas flow is changed, and the speed of the combustion residue is further reduced or stopped. This combustion residue is cooled and solidified, adheres to the vicinity of the inner wall of the partition member 131, and gas The combustion residue that has not adhered is ejected from the hole 127a to the flow path 130. Further, after gas and combustion residue flow through the flow path 130, they collide with the outer wall of the corrugated portion 127b and the lower lid portion 122b. Although the gas is released to the outside from the hole 122d, the combustion residue is also cooled and solidified here, so that it adheres to the vicinity of the outer wall of the corrugated portion 127b and the inner wall of the lower lid portion 122b and is hardly released to the outside.

  According to the present embodiment, the same effects as those of the first embodiment can be obtained.

<Twelfth embodiment>
Next, a gas generator according to a twelfth embodiment of the present invention will be described with reference to the drawings. FIG. 13 is a schematic cross-sectional view showing a gas generator according to a twelfth embodiment of the present invention. In addition, in this embodiment, about the part (code | symbol 141-146, 148-151, 213) similar to 10th Embodiment, it is the part of the code | symbol (code | symbol 101-106, 108-111, 211) of 10th Embodiment. Each of them is shown in order, and description of such similar parts may be omitted.

  The gas generator 1013 according to this embodiment shown in FIG. 13 has a gas reservoir 152 formed by using a flow path forming member 147 instead of the flow path forming member 107 of the tenth embodiment. Thus, the gas generator 1011 according to the tenth embodiment is different.

  The flow path forming member 147 includes a cylindrical portion 147a whose one end is fixed to the partition member 151, and a tapered cylindrical portion that is connected to the cylindrical portion 147a and gradually increases in diameter toward the lower lid portion 142b. 147b and a cylindrical portion 147c that is connected to the tapered cylindrical portion 147b and has one end fixed to the lower lid portion 142b. Further, the tapered cylindrical portion 147b has a concave portion 147e formed at a position facing the hole 146a of the flow path forming member 146. In addition, a plurality of holes 147d are provided on the side surface in the vicinity of the partition member 151 of the cylindrical portion 147a.

  The gas reservoir portion 152 is in contact with the outside of the hole 146a of the flow path forming member 146, the flow path forming member 146, the lower lid portion 142b, the tapered cylindrical portion 147b of the flow path forming member 147, and the cylindrical portion. It is a space surrounded by 147c. The gas reservoir 152 communicates with the flow path 149 (first flow path).

  Next, the operation of the gas generator 1013 will be described. When it becomes necessary to generate and eject gas, first, the igniter 143 is operated, and the gas generating agent 144 is ignited and burned in the combustion chamber 141 to generate gas. As a result, the internal pressure of the combustion chamber 141 is increased by the combustion of the gas generating agent 144, the rupture member 213 is broken, and the gas is released from the hole 151a. Here, as shown in the example of the gas flow shown in FIG. 13 (arrows in FIG. 13), the generated gas is ejected from the hole 151a to the flow path 148, and the inner wall of the lower lid 142b at the end of the flow path 148. Gas is ejected from the hole 146a to the gas reservoir 152. At the same time, the combustion residue of the gas is also ejected from the hole 151a into the flow path 148 and collides with the inner wall of the lower lid 142b at the end of the flow path 148, so that the speed of the combustion residue is reduced or a part of the combustion residue is stopped. The combustion residue is cooled and solidified and adheres to the vicinity of the inner wall of the lower lid portion 142b, and the combustion residue that does not adhere is ejected from the hole 146a to the gas reservoir 152. The gas and the combustion residue that has not adhered are ejected to the gas reservoir 152 and then collide with the concave portion 147e. However, the flow is blocked by the tapered cylindrical portion 147b, as shown by arrows in the gas reservoir 152 of FIG. Cause convection. As a result, the combustion residue convects or stays in the gas reservoir 152, so that the speed of the combustion residue is reduced or a part of the combustion residue is easily stopped, and the combustion residue is cooled and solidified to adhere to the inner wall. Next, the gas and the remaining combustion residue flow out to the flow path 149. Similarly, the gas and the remaining combustion residue collide with the inner wall of the partition member 151, the direction of the gas flow changes, and the velocity of the combustion residue is further reduced or stopped. The combustion residue is cooled and solidified, adheres to the vicinity of the inner wall of the partition member 151, and the gas and the combustion residue that has not adhered jet out to the flow path 150 from the hole 147d. Further, after gas and combustion residue flow through the flow path 150, they collide with the outer wall of the tapered cylindrical portion 147b and the lower lid portion 142b. Although the gas is released to the outside from the hole 142d, the combustion residue is cooled and solidified here, so that it adheres to the vicinity of the outer wall of the tapered cylindrical portion 147b and the inner wall of the lower lid portion 142b and is hardly released to the outside.

  According to the present embodiment, the same effects as those of the tenth embodiment are achieved. Further, the gas and combustion residue ejected from the hole 146a are easily convected in the gas reservoir 152, and the gas and combustion residue are easily distributed throughout the gas reservoir 152. As a result, the retention of gas and combustion residue is promoted in the gas reservoir 152, and the cooling capacity of the combustion residue is further improved, so that the amount of captured combustion residue can be further increased.

<13th Embodiment>
Next, a gas generator according to a thirteenth embodiment of the present invention will be described with reference to the drawings. FIG. 14 is a schematic cross-sectional view showing a gas generator according to a thirteenth embodiment of the present invention. In addition, in this embodiment, about the part (code | symbol 161-166,168-171,214) similar to 10th Embodiment, it is the part of the code | symbol (code | symbol 101-106, 108-111, 211) of 10th Embodiment. Each of them is shown in order, and description of such similar parts may be omitted.

  The gas generator 1014 according to this embodiment shown in FIG. 14 has a gas reservoir 172 formed by using a flow path forming member 167 instead of the flow path forming member 107 of the tenth embodiment. Thus, the gas generator 1011 according to the tenth embodiment is different.

  The flow path forming member 167 includes a cylindrical portion 167a whose one end is fixed to the partition member 171, and a tapered cylindrical portion that is connected to the cylindrical portion 167a and gradually increases in diameter as it gradually approaches the lower lid portion 162b. 167b and a cylindrical portion 167c that is connected to the tapered cylindrical portion 167b and has one end fixed to the lower lid portion 162b. Further, the tapered cylindrical portion 167b has a corrugated portion 167e formed at a position facing the hole 166a of the flow path forming member 166. A plurality of holes 167d are provided on the side surface of the cylindrical portion 167a near the partition member 171.

  The gas reservoir 172 is in contact with the outside of the hole 166a of the flow path forming member 166, the flow path forming member 166, the lower lid portion 162b, the tapered cylindrical portion 167b of the flow path forming member 167, and the cylindrical portion. It is a space formed by being surrounded by 167c. The gas reservoir 172 communicates with the flow path 169 (first flow path).

  Next, the operation of the gas generator 1014 will be described. When it is necessary to generate and eject gas, first, the igniter 163 is operated, and the gas generating agent 164 is ignited and burned in the combustion chamber 161 to generate gas. As a result, the internal pressure of the combustion chamber 161 increases due to the combustion of the gas generating agent 164, the rupture member 214 is broken, and the gas is released from the hole 171a. Here, as in the example of the gas flow shown in FIG. 14 (arrows in FIG. 14), the generated gas is ejected from the hole 171a to the flow path 168, and the inner wall of the lower lid portion 162b at the end of the flow path 168 The gas is ejected from the hole 166a to the gas reservoir 172. At the same time, the combustion residue of the gas is also ejected from the hole 171a to the flow path 168 and collides with the inner wall of the lower lid portion 162b at the end of the flow path 168, so that the speed of the combustion residue is reduced or a part of the combustion residue is stopped. The combustion residue is cooled and solidified and adheres to the vicinity of the inner wall of the lower lid portion 162b, and the combustion residue that does not adhere is ejected from the hole 166a to the gas reservoir 172. The gas and the combustion residue that has not adhered are ejected to the gas reservoir 172, then collide with the tapered cylindrical portion 167b, the flow is changed, and convection as indicated by arrows in the gas reservoir 172 in FIG. 14 occurs. . As a result, the combustion residue convects or stays in the gas reservoir 172, so that the speed of the combustion residue is reduced or a part of the combustion residue is easily stopped, and the combustion residue is cooled and solidified to adhere to the inner wall. Next, the gas and the remaining combustion residue flow out to the flow path 169. Similarly, the gas and the remaining combustion residue collide with the inner wall of the partition member 171 to change the gas flow direction, and the speed of the combustion residue is further reduced or stopped. The combustion residue is cooled and solidified, and adheres to the vicinity of the inner wall of the partition member 171, and the gas and the combustion residue that has not adhered are ejected from the hole 167 d to the flow path 170. Further, after the gas and combustion residue flow through the flow path 170, they collide with the outer wall of the tapered cylindrical portion 167b and the lower lid portion 162b. Although the gas is released to the outside from the hole 162d, the combustion residue is cooled and solidified here, so that it adheres to the vicinity of the outer wall of the tapered cylindrical portion 167b and the inner wall of the lower lid portion 162b and is hardly released to the outside.

  According to the present embodiment, the same effects as those of the tenth embodiment are achieved. In addition, the gas and combustion residue ejected from the hole 166a are easily convected in the gas reservoir 172, and the gas and combustion residue are easily distributed throughout the gas reservoir 172. As a result, the retention of gas and combustion residue is promoted in the gas reservoir 172, and the cooling capacity of the combustion residue is further improved, so that the amount of captured combustion residue can be further increased.

  The present invention can be changed in design without departing from the scope of the utility model registration request, and is not limited to the above embodiment. For example, the number of collisions of the gas ejected from the combustion chamber with the wall may be larger than that in the above embodiments, that is, the zigzag may be further repeated.

  Further, the flow path may be a complicated zigzag shape instead of a regular zigzag shape as in the above embodiments. In the sixth to ninth, twelfth and thirteenth embodiments, only one gas reservoir is formed, but a gas generator having two or more parts may be used. In addition, the gas reservoir may have another polygonal shape such as a square or a complicated shape.

  Moreover, in each embodiment other than the first embodiment, as in the modification of the first embodiment, in a member having a portion where a gas from a combustion chamber or a combustion residue collides, at least the thickness of the collision portion is increased. It is good to do. Thereby, it is possible to improve the cooling efficiency, increase the amount of combustion residue trapped, and prevent a hole from being opened by melting with a high-temperature gas.

  Furthermore, in the above-described embodiments, the upper lid portion and the lower lid portion have a disk shape having a flat portion on the front and back sides, but instead of these, the upper lid portion and the lower lid portion having an uneven portion or a curved portion. It is good also as using a cover part.

1 is a schematic cross-sectional view showing a gas generator according to a first embodiment of the present invention. FIG. 5 is a schematic cross-sectional view showing a gas generator according to a modification of the first embodiment of the present invention. It is a model type sectional view showing a gas generator concerning a 2nd embodiment of the present invention. It is a model type sectional view showing a gas generator concerning a 3rd embodiment of the present invention. FIG. 6 is a schematic cross-sectional view showing a gas generator according to a fourth embodiment of the present invention. FIG. 6 is a schematic cross-sectional view showing a gas generator according to a fifth embodiment of the present invention. FIG. 9 is a schematic cross-sectional view showing a gas generator according to a sixth embodiment of the present invention. FIG. 10 is a schematic cross-sectional view showing a gas generator according to a seventh embodiment of the present invention. It is a cross-sectional view showing a gas generator according to an eighth embodiment of the present invention. It is a cross-sectional view showing a gas generator according to a ninth embodiment of the present invention. It is a model sectional drawing which shows the gas generator which concerns on 10th Embodiment of this invention. It is a model type sectional view showing a gas generator concerning an 11th embodiment of the present invention. It is a cross-sectional view showing a gas generator according to a twelfth embodiment of the present invention. It is a cross-sectional view showing a gas generator according to a thirteenth embodiment of the present invention.

Explanation of symbols

1, 11, 21, 31, 41, 51, 61, 71, 81, 91, 101, 121, 141, 161 Combustion chamber 2, 12, 22, 32, 42, 52, 62, 72, 82, 92, 102 122, 142, 162 Hollow cylindrical members 2a, 12a, 22a, 32a, 42a, 52a, 62a, 72a, 82a, 92a, 102a, 122a, 142a, 162a Upper lid portions 2b, 12b, 22b, 32b, 42b, 52b 62b, 72b, 82b, 92b, 102b, 122b, 142b, 162b Lower lid 2c, 5b, 6b, 12c, 15b, 16b, 22c, 25b, 26b, 32c, 35b, 36b, 42c, 45b, 46b, 52c 55b, 56b, 62c, 65b, 65d, 66b, 72c, 75b, 75d, 76b, 82c, 85b, 85 d, 86b, 92c, 95b, 95d, 96b, 102c, 122c, 142c, 147a, 147c, 162c, 167a, 167c Tube portion 2d, 12d, 22d, 32d, 42d, 52d, 62d, 72d, 82d, 92d, 102d 106a, 107a, 111a, 122d, 126a, 127a, 131a, 142d, 146a, 147d, 151a, 162d, 166a, 167d, 171a Holes 3, 13, 23, 33, 43, 53, 63, 73, 83, 93 103, 123, 143, 163 Igniters 4, 14, 24, 34, 44, 54, 64, 74, 84, 94, 104, 124, 144, 164 Gas generants 5, 6, 15, 16, 25, 26, 35, 36, 45, 46, 55, 56, 66, 76, 86, 96, 106, 107, 126, 127, 146, 147, 166, 167 Channel forming members 5a, 6a, 15a, 16a, 25a, 26a, 35a, 36a, 45a, 46a, 55a, 56a, 65a, 66a, 75a, 76a, 85a, 86a, 95a, 96a Bottom 6c, 16c, 26c, 36c, 46c, 56c, 66c, 76c, 86c, 96c Flange 7, 8, 9, 17, 18, 19, 27, 28, 29, 37, 38, 39, 47, 48, 49, 57, 58, 59, 67, 68, 69, 77, 78, 79, 87, 88, 89, 97, 98, 99, 108, 109, 110, 128, 129, 130, 148, 149, 150, 168, 169, 170 Channels 5c, 15c, 25c, 35c, 65e, 85e, 107b, 147e Recesses 30, 65f, 75f In 40, 60, 85f, 95f Heat-resistant member 45c, 55c, 75e, 95e, 127b, 167e Corrugated part 65c, 75c, 85c, 95c, 147b, 167b Tapered cylindrical part 65, 75, 85, 95 Gas reservoir Forming members 70, 80, 90, 100, 152, 172 Gas reservoirs 111, 131, 151, 171 Partition members 1001, 1002, 1003, 1004, 1005, 1006, 1007, 1008, 1009, 1010, 1011, 1012, 1013, 1014 Gas generator 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214 Rupture member

Claims (11)

A combustion chamber that is loaded with a gas generating agent and has a hole for ejecting gas when the gas generating agent burns; an igniter that ignites the gas generating agent in the combustion chamber; A gas generator having a flow path through which gas when the gas generating agent burns,
There is no filter member whose main function is to filter the residual gas components,
The flow path is connected to the hole outside the combustion chamber, and has a concave portion or a corrugated portion in the middle, and the flow direction of the gas ejected from the hole is three times in the middle. As described above, it is formed in a zigzag shape from the center of the combustion chamber toward the outside,
The gas generator, wherein the concave portion or the wave shape portion is formed at a position where a direction in which the gas flows is changed. A part of the flow path is formed of a flow path forming member having a concave portion or a corrugated portion,
2. The gas generator according to claim 1, wherein a portion forming the concave portion or the wave shape portion of the flow path forming member is formed to be thicker than other portions.   The gas generator according to claim 1 or 2, wherein a heat-resistant member is laid on an inner wall of the concave portion or the wave-shaped portion.   The gas generator according to claim 1 or 2, wherein a heat radiation fin having a thermal conductivity of 99 W / (m · K) or more is provided on an outer wall of the concave portion.   3. The gas according to claim 1, wherein the flow path includes a first flow path having a predetermined width, and a gas reservoir portion connected to the first flow path and formed in a bag channel shape. 4. Generator.   6. The gas generator according to claim 5, wherein the gas reservoir is formed at a position facing the hole and has a width wider than the width of the first flow path. The gas reservoir has a tapered portion that narrows toward the first flow path;
The gas generator according to claim 6, wherein the tapered portion is formed at a position where the tapered portion collides with a gas ejected from the hole of the combustion chamber. The gas reservoir is partly fixed to the outer wall of the combustion chamber, and is surrounded by the inner wall of the gas reservoir forming member that forms part of the flow path, and the outer wall of the combustion chamber Is formed,
The portion of the gas reservoir forming member that collides with the gas ejected from the hole of the combustion chamber is covered with a heat-resistant member that blocks the heat of the gas. The gas generator of any one of Claims. The gas reservoir is formed by being surrounded by an inner wall of a gas reservoir forming member whose outer wall is in contact with the outer space and an outer wall of the combustion chamber;
8. The heat dissipation fin having a thermal conductivity of 99 W / (m · K) or more is provided on an outer wall of the gas reservoir forming member, according to claim 5. Gas generator. The combustion chamber has a short hollow cylindrical shape having a plurality of holes in a cylindrical portion;
The gas generator according to any one of claims 1 to 9, wherein the flow path is formed around the outside of the cylindrical portion of the combustion chamber. The combustion chamber has an elongated hollow cylindrical shape in which the igniter is provided at one end in the axial direction and the hole is formed at the other end in the axial direction.
The gas generator according to any one of claims 1 to 8, wherein the flow path is formed outside the other end in the axial direction of the combustion chamber.

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