TWM500710U - Dual stage type mixed mode gas generator - Google Patents

Description

Two-stage hybrid gas generator 【0001】

The present invention discloses a two-stage hybrid gas generator, especially for triggering combustion of different doses of gas-producing tablets according to different ignition messages, so that the airbag can obtain different gas amounts of gas, thereby coping with different gases. The degree of impact.

【0002】

Airbags are standard equipment for vehicles. When a vehicle collides, the gas generator in the airbag needs to be inflated instantaneously in a very short period of time to form a barrier layer with cushioning and protection functions to protect the driver and passengers. Safety.

[0003]

At present, the inflation mode of the airbag can be roughly divided into the following categories: 1. Compressed gas type: the high pressure gas is stored in the gas cylinder, and is quickly released to fill the airbag when needed, and the disadvantage is that the required gas storage amount and pressure are relatively high. Large, and thus limited to the design of the cylinder and related manufacturing costs. 2. Pyrotechnic type: The airbag is filled by burning the ingot to generate gas. However, the high temperature gas after the combustion reaction easily causes the airbag to be damaged, causing burns or burns to the passenger, and the solid residue after burning the ingot and Toxic gases have a negative impact on the human body and the environment. 3. Hybrid gas-filled type: The method of igniting the ingot to generate gas and mixing the pre-filled high-pressure gas to lower the gas temperature can effectively solve the problem of a single type, but the structural design and manufacture of the hybrid inflator are complicated. Must have special skills to implement.

[0004]

In addition, a two-stage pyrotechnic gas generator with better protection effect has been developed, which combines various sensors to enable the two-stage pyrotechnic gas generator to release a proper amount of air, so that the airbag has better Protection effect. However, the mixed gas generator is coated with high-pressure gas because the internal gas-producing tablet is coated with high-pressure gas, and its combustion property is improved under high pressure. If the design is a two-stage type, the second-stage gas-generating tablet is easy. When the first stage is used, it is ignited, so the technical difficulty of the two-stage hybrid gas generator is relatively high, and its manufacturing cost is high and it is difficult to develop.

[0005]

As mentioned above, the author of this creation has been painstakingly researching, thinking and designing a two-stage hybrid gas generator for many years to improve the lack of existing technology, thereby enhancing the implementation and utilization of the industry.

[0006]

In view of the above-mentioned problems, the purpose of the present invention is to propose a two-stage hybrid gas generator, which integrates the configuration of related components in a limited space to achieve the goal of miniaturization design and thereby improve assembly convenience. At the same time reduce manufacturing costs.

【0007】

In view of the above-mentioned problems, the purpose of the present invention is to propose a two-stage hybrid gas generator which utilizes a double pharmacy structure design to fill different doses of gas-producing tablets, thereby providing different degrees of aeration to cope with Different levels of impact.

[0008]

In view of the above-mentioned problems, the purpose of the present invention is to propose a two-stage hybrid gas generator, which utilizes a drug chamber cup, a liner ring, a cup cover, and the like to provide a housing space for filling a gas-producing tablet. The isolation of the drug chamber components can avoid the risk of misfired by the injection of the welding slag into the welding process, thereby improving the safety during manufacture and assembly.

【0009】

Based on the above purposes, the present invention provides a two-stage hybrid gas generator comprising a main casing, a center pipe, a sealing group, a first drug room group, a second drug room group, a first ignition device group, and a Two ignition units and an exhaust hood. The main shell comprises a bottom shell and an upper shell, wherein the upper shell is fixedly fixed above the bottom shell and cooperates with the bottom shell to form a complete sealed shell, wherein the bottom wall of the bottom shell is provided with a first ignition hole and a second ignition hole, The top end of the shell is provided with a piercing opening.

[0010]

The central tube can be a hollow tube member, the bottom end of the central tube is correspondingly fixed to the bottom shell, and the upper end thereof is correspondingly passed through the through opening and fixed to the upper shell, and the wall of the central tube is provided with a plurality of convection holes. The sealing group is correspondingly disposed at the upper end of the central tube to prevent the gas in the main casing from escaping, and is broken and opened when receiving a certain degree of thrust from the inner side.

[0011]

The first medicine chamber group comprises a lining ring and a first cup cover, and the lining ring is correspondingly disposed on the inner ring wall surface of the bottom shell, and the center of the first cup cover is provided with a sleeve hole to be correspondingly sleeved on the center tube, and the first cup cover The first medicine chamber is formed on the top of the lining ring, and the first medicine chamber is filled with the first dose. The second chamber group is disposed in the bottom case, and the second chamber group comprises a second chamber cup and a second lid, the second chamber cup has a through hole and is correspondingly fixed to the second ignition hole, and the second The chamber cup is filled with a second dose of the gas-producing tablet, and the second cup shape corresponds to the second chamber cup and is disposed on the second chamber cup.

[0012]

The first ignition device is disposed through the first ignition hole to be disposed in the first drug chamber, and receives the first ignition signal to generate the first ignition gas flow to trigger the combustion of the first dose of the gas generating tablet. The second ignition device is disposed through the second ignition hole and the through hole to be disposed in the second chamber cup, and can receive the second ignition signal to generate a second ignition gas flow to trigger the second dose of the gas generating tablet combustion. The exhaust hood is sleeved on the main casing and forms a deposition space with the main casing to accommodate solid residue generated after combustion. The exhaust hood may have a plurality of vent holes for gas discharge.

[0013]

Preferably, the first chamber group further comprises an adjustment flap, and the adjustment flap can adjust the accommodation space of the first medicine chamber, thereby adjusting the filling amount of the first dose of the gas-producing tablet.

[0014]

Preferably, the sealing group can include a cover and a sealing piece. The sealing cover has a through opening and is disposed at an upper end of the central tube, and the sealing piece is fixed on the opening to block gas escape in the main casing, and the sealing piece bears a certain degree from the inner side. The thrust is initially broken and opened.

[0015]

Preferably, the first ignition set further includes a first steering cover, and the first steering cover can be a hollow casing and penetrates the first guiding hole on one side of the wall surface thereof, and the first steering cover is fixedly disposed on the first guiding cover. The ignition set is guided by the first guiding hole to guide the direction of the first ignition airflow.

[0016]

Preferably, the second ignition set further comprises a second steering cover, the second steering cover can be a hollow casing and penetrates the second guiding hole on one side of the wall surface thereof, and the second steering cover is fixedly sleeved on the second ignition And having a second guiding hole for guiding the direction of the second ignition airflow.

[0017]

Preferably, the first ignition device group further comprises a baffle plate disposed outside the first steering cover to limit the placement position of the first dose of the gas generating tablet.

[0018]

Preferably, the two-stage hybrid gas generator of the present invention further comprises a vent pipe, the vent pipe is sleeved on the outer side of the center pipe, and the vent pipe is provided with a plurality of orifices.

[0019]

Preferably, the plurality of orifices and the plurality of orifices are not aligned with each other.

[0020]

Preferably, the bottom of the first chamber cup and/or the second chamber further comprises a cushion to prevent the gas-producing tablet from being broken by shaking.

[0021]

Preferably, the cushion may comprise a ceramic fiber mat, a crochet mat or a heat resistant rubber mat.

[0022]

Preferably, the hood further comprises a screen to filter solid residue.

[0023]

The main purpose of this creation is to provide a two-stage hybrid gas generator that has the following advantages:

[0024]

1. Enhance the protection of the second drug room group: use the independent second drug room group to obtain complete protection of the second dose of the gas-producing drug ingot, avoiding the misfire of the hot gas flow during the action of the first drug room group. A gas-producing tablet in the body of the second drug chamber.

[0025]

2. Micro-design: With the relative arrangement of the drug room group and the ignition device group, proper assembly and configuration in a limited space to achieve the purpose of micro-design can effectively improve the shortcomings of the conventional gas generator.

[0026]

3. Elevation of convenience: Due to the miniaturization of the overall structure, it provides great convenience in the assembly process, and the miniaturization design can increase the use of assembly changes, which can be extended to other application fields.

[0027]

4. Improve assembly safety: use the structure of the liner ring, the cup body and the cup cover to block the gas-producing ingot from directly contacting the main shell, and avoid the components such as the bottom shell and the upper shell, the center tube and the sealing group. In the case of assembly welding, mis-ignition occurs due to spattering of the welding slag, thereby improving assembly safety.

[0028]

5. Improve the safety of use: The concept of using two-stage trigger can not only trigger the appropriate amount of inflation according to the actual degree of collision, but also effectively solve the problem of extrusion caused by the over-inflation of the conventional gas generator. More preferably, The hybrid design allows the use of pre-filled high-pressure gas to reduce the temperature of the active gas to avoid damage to the airbag caused by the high temperature of the inflation gas, resulting in secondary injuries such as burns.

[0029]

In order to make the above-mentioned objects, technical features, and gains after actual implementation more obvious, a more detailed description will be given below with reference to the corresponding drawings in the preferred embodiments.

100‧‧‧Double-stage hybrid gas generator

10‧‧‧ main shell

11‧‧‧ bottom case

111‧‧‧First ignition hole

112‧‧‧Second ignition hole

12‧‧‧Upper shell

121‧‧‧ wearing a mouth

20‧‧‧ center tube

21‧‧‧ convection hole

30‧‧‧Filling group

31‧‧‧ Cover

311‧‧‧ mouth

32‧‧‧Filling

40‧‧‧First Drugstore Group

41‧‧‧ lining ring

42‧‧‧ first cup cover

421‧‧‧ wearing a hole

45‧‧‧First Drug Room

48‧‧‧Adjustment

50‧‧‧Second Pharmacy Group

51‧‧‧Second chamber cup

511‧‧‧through hole

52‧‧‧Second cup cover

60‧‧‧First ignition unit

62‧‧‧First steering cover

621‧‧‧First guiding hole

65‧‧‧Baffle

70‧‧‧Second ignition unit

72‧‧‧Second steering cover

721‧‧‧Second guiding hole

80‧‧‧Exhaust hood

82‧‧‧ venting holes

85‧‧‧ Filter

8‧‧‧ cushion

A-A‧‧‧ section perspective

B-B‧‧‧ section perspective

The first figure is an exploded view of the parts of the two-stage hybrid gas generator of the present invention.

Figure 2 is a partial exploded view of the two-stage hybrid gas generator of the present invention.

Figure 3 is a block diagram of the two-stage hybrid gas generator of the present invention.

Figure 4 is a schematic cross-sectional view of the A-A of the assembled two-stage hybrid gas generator.

Figure 5 is a schematic cross-sectional view of the B-B of the two-stage hybrid gas generator of the present invention.

[0030]

In order to understand the creative characteristics, content and advantages of this creation and the effects that can be achieved by the examiner, the author will use the drawings in detail and explain the following in the form of the examples, and the drawings used therein The subject matter is only for the purpose of illustration and supplementary instructions. It is not necessarily the true proportion and precise configuration after the implementation of the creation. Therefore, the proportions and configuration relationships of the attached drawings should not be interpreted or limited in the actual implementation scope.

[0031]

The advantages, features, and technical methods of the present invention will be more readily understood by referring to the exemplary embodiments and the accompanying drawings, and the present invention may be implemented in various forms and should not be construed as limited thereto. The embodiments set forth herein, and vice versa, will provide a more thorough and complete and complete disclosure of the scope of the present invention, and the present invention will only be The scope of the patent application is defined.

[0032]

The difference between the present invention and the conventional single-stage gas generator is that the two sets of the chamber structure are used to fill the different doses of the gas-producing tablets, and the explosive filling is selectively performed by different ignition messages. Provides an appropriate degree of airbag inflation to provide optimal protection.

[0033]

Please refer to FIG. 1 to FIG. 5 simultaneously. The two-stage hybrid gas generator 100 includes a main casing 10, a center tube 20, a sealing group 30, a first medicine chamber group 40, a second medicine chamber group 50, and a first Igniter set 60, second igniter set 70, and hood 80.

[0034]

The main casing 10 includes a bottom casing 11 and an upper casing 12. In practice, the bottom casing 11 may be a half-shell having a circular cross section and recessed into an accommodating space, and a first ignition is provided on the bottom wall of the bottom casing 11. The hole 111 and the second ignition hole 112. The upper casing 12 is disposed opposite to the bottom casing 11, and the top wall end of the upper casing 12 is provided with a recessed opening 121 for the central pipe 20 to be connected and fixed. In practice, the upper case 12 is correspondingly fixed on the bottom case 11 and cooperates with the bottom case 11 to form a complete sealed casing to present a disc-like structure, whereby the micro shape can be applied to a small space buried in the front seat of the vehicle. To improve assembly convenience and practicality.

[0035]

The central tube 20 can be a hollow tube. The bottom end of the central tube 20 is correspondingly fixed to the bottom shell 11, and the upper end thereof passes through the through hole 121 and is fixed to the upper shell 12. The tube wall of the central tube 20 is provided with a plurality of convection holes. twenty one.

[0036]

Further, a vent pipe (not shown) may be further included, and the vent pipe is sleeved on the outer side of the center pipe 20, and a plurality of throttle holes are formed through the vent pipe, and the convection hole 21 and the throttle are implemented. The positions of the holes are not aligned with each other, so that the gas generated during combustion can be throttled by flowing through the vent pipe to the center tube 20, and the burnt residue of the tablet can be initially filtered. In practice, the position and aperture of the plurality of orifices can be adjusted to control the burning time, adjust the output air pressure, and reduce the number of detonation decibels caused by the burning of the gunpowder.

[0037]

The cover group 30 is disposed at the upper end of the central tube 20 to prevent the gas in the main casing 10 from escaping. In practice, the cover group 30 can include a cover 31 and a cover 32. The cover 31 has a through port 311 and is disposed. At the upper end of the central tube 20, the sealing piece 32 is fixed to the opening 311 to block the gas pre-filled in the main casing 10 from escaping. The pre-filled gas also has the function of avoiding the oxidation of the gas-producing tablet due to contact with oxygen, thereby affecting the burning rate.

[0038]

When the sealing piece 32 is not actuated, the airtightness requirement can be satisfied by its own strength. However, when the gas-generating tablet in the medicine chamber is burned, the generated high-temperature rising gas is impacted by the guiding of the central tube 20. Inside the cover 32, when the thrust on the inside of the cover 32 exceeds the strength of the material of the cover 32, the cover 32 is broken open to guide the flow of air into the airbag via the hood 80 to achieve instant inflation. The purpose.

[0039]

The first chamber group 40 includes a backing ring 41 and a first cup cover 42. The backing ring 41 is correspondingly disposed on the inner ring wall surface of the bottom shell 11. The center of the first cup cover 42 is provided with a sleeve hole 421 for corresponding sleeve. In the center tube 20, the first cup cover 42 is contoured to cover the collar 41 to cover the top of the liner 41, and the first lid 42 can also simultaneously press the second lid 52. In practice, the backing ring 41, the first cup cover 42 and the bottom case 11 form a first medicine chamber 45, and the first medicine chamber 45 can be filled with the first dose of the gas generating tablet. In practice, the first chamber group 40 can further include an adjustment flap 48, which can adjust the accommodation space of the first medicine chamber 45, thereby adjusting the filling amount of the first dose of the gas-producing tablet.

[0040]

The second chamber group 50 is disposed in the bottom case 11, and the second chamber group 50 includes a second chamber cup 51 and a second lid 52. The cup bottom of the second chamber cup 51 has a through hole 511. The position of the through hole 511 corresponds to the second ignition hole 112. In practice, the hole structure of the through hole 511 and the second ignition hole 112 may be stacked to form a passage through which the second ignition device group 70 can be disposed. The second cup cover 52 has a shape corresponding to the second chamber cup 51 and is disposed on the second chamber cup 51. In practice, the second dose of the gas-producing tablet can be designed and dispensed according to actual needs to be filled. It is disposed in the second chamber cup 51 to generate a corresponding amount of gas.

[0041]

Further, the first cup cover 42 may further add an annular support piece to push between the upper case 12 and the first cup cover 42 to provide a supporting force to prevent the first cup cover 42 from shaking due to the main case 10 shaking. . And the first cup cover 42 can press against the second lid 52 to minimize the gap between the second chamber cup 51 and the second lid 52, thereby avoiding the action of the gas-producing tablet in the first medicine chamber 45. The hot gas stream enters the second chamber cup 51, thereby igniting the second dose of the gas producing tablet.

[0042]

In practice, the first cup cover 42 and the backing ring 41, the second chamber cup 51 and the second lid 52 can be movable. When the gas-generating tablet is burned, the working gas can be flushed out of the medicine chamber. The structure flows through the center tube 20 to produce an aeration effect.

[0043]

Further, the height of the backing ring 41 is slightly higher than the height of the bottom case 11 to form an isolation layer between the bottom case 11 and the upper case 12 to prevent the slag splashing when the bottom case 11 and the upper case 12 are selectively welded and combined. Shoot and burn the gas-producing tablets in the drug room.

[0044]

In practice, the bottom of the first drug chamber 45 and/or the second drug chamber cup 51 may further include a cushion 8 to prevent the gas-generating tablet from being broken by shaking to ensure that the burning rate of the gas-generating tablet is not affected. Further, a proper inflation rate is maintained, wherein the cushion 8 comprises a ceramic fiber mat, a crochet mat or a heat resistant rubber mat.

[0045]

The first ignition hole group 60 is disposed through the first ignition hole 111 to be disposed in the first medicine chamber 45 to receive the first ignition signal to generate the first ignition gas flow to trigger the first dose of the gas generating drug. Ingot burning. In practice, the first igniter set 60 may further include a first steering cover 62 and is fixedly sleeved on the first igniter set 60. The first steering hood 62 is a hollow casing and runs through one side of the wall surface. a first guiding hole 621, and guiding the first dose of the gas generating tablet filled in the first medicine chamber 45 according to the set combustion by the first guiding hole 621 to guide the direction of the first ignition airflow The rate is gradually burned. In practice, the first igniter set 60 may further include a baffle 65 disposed on the outer side of the first steering hood 62 to limit the position of the gas-producing medicinal ingot to avoid abnormal sound or even effect It affects the gas production efficiency.

[0046]

The second ignition unit 70 is disposed through the second ignition hole 112 and the through hole 511 to be disposed in the second chamber cup 51 to receive the second ignition signal to generate a second ignition airflow to trigger the second dose of gas. The ingot is burned. Similarly, the second ignition set 70 may further include a second steering cover 72 to utilize the second guiding hole 721 of the wall of the second steering cover 72 to guide the second ignition airflow direction.

[0047]

The exhaust hood 80 is sleeved on the main casing 10 and fixed by welding, and a deposition space is formed between the exhaust hood 80 and the main casing 10 to accommodate solid residue generated after combustion, and the exhaust hood 80 can be A plurality of venting holes 82 are provided for discharging the working gas. In practice, the plurality of venting holes 82 are evenly distributed around the hood 80 to uniformly release the working gas that breaks through the sealing group 30, thereby uniformly and rapidly. The ground is filled in the airbag to provide protection.

[0048]

The exhaust hood 80 may further include a filter 85. The filter 85 is used to filter the solid residue after combustion, thereby reducing the amount of solid residue entering the airbag, thereby preventing the solid residue from damaging the airbag due to high pressure to cause secondary injury. The hood 80 further includes a fixing portion to be correspondingly locked to the mounting portion of the airbag.

[0049]

The two-stage hybrid gas generator of the present invention can effectively expand its application field by utilizing the structural design and the configuration plan between related components to achieve the purpose of micro and integrated design and thereby reducing the assembly space. Furthermore, the concept of two-stage is used to design a double-chamber structure, and by transmitting different ignition signals according to different impact levels, thereby triggering combustion of different doses of gas-producing tablets to provide different degrees of protection. . And the hybrid inflation concept can reduce the temperature of the explosive gas to avoid burns or burns. The filter can filter the solid residue to prevent foreign matter from spurting, so as to improve the safety of use. Furthermore, the use of pre-filled gas can reduce the demand for gas-producing tablets, thereby reducing the environmental toxicity of the tablet burning.

[0050]

The embodiments described above are only for explaining the technical idea and characteristics of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement them according to the scope of the patent. That is, the equivalent changes or modifications made by the people in accordance with the spirit revealed by this creation should still be covered by the scope of the patent of this creation.

100‧‧‧Double-stage hybrid gas generator

10‧‧‧ main shell

11‧‧‧ bottom case

111‧‧‧First ignition hole

112‧‧‧Second ignition hole

12‧‧‧Upper shell

121‧‧‧ wearing a mouth

20‧‧‧ center tube

21‧‧‧ convection hole

30‧‧‧Filling group

31‧‧‧ Cover

311‧‧‧ mouth

32‧‧‧Filling

40‧‧‧First Drugstore Group

41‧‧‧ lining ring

42‧‧‧ first cup cover

421‧‧‧ wearing a hole

48‧‧‧Adjustment

50‧‧‧Second Pharmacy Group

51‧‧‧Second chamber cup

511‧‧‧through hole

52‧‧‧Second cup cover

60‧‧‧First ignition unit

62‧‧‧First steering cover

621‧‧‧First guiding hole

65‧‧‧Baffle

70‧‧‧Second ignition unit

72‧‧‧Second steering cover

80‧‧‧Exhaust hood

82‧‧‧ venting holes

85‧‧‧ Filter

8‧‧‧ cushion

Claims (12)

[Item 1] A two-stage hybrid gas generator comprising:
a main casing comprises a bottom shell and an upper shell, wherein the upper shell is fixedly fixed above the bottom shell and cooperates with the bottom shell to form a complete sealed shell, and a bottom wall of the bottom shell is provided with a first ignition a hole and a second ignition hole, the top wall end of the upper case is provided with a through hole;
A central tube is a hollow tube member, and a bottom end of the central tube is correspondingly fixed to the bottom case, and an upper end thereof passes through the through hole and is fixed to the upper case, and the tube wall of the center tube is provided with a plurality of tubes Convection hole
a sheet group correspondingly disposed at an upper end of the center tube to prevent gas in the main shell from escaping, and is broken and opened when receiving a certain degree of thrust from the inner side;
a first pharmacy group includes a lining ring and a first cup cover, wherein the lining ring is disposed on the inner ring wall surface of the bottom case, and the center of the first cup cover is provided with a sleeve hole to be correspondingly disposed on the a central tube, the first cup cover is disposed at the top of the backing ring, and further forms a first medicine chamber with the bottom case, and the first medicine chamber is filled with a first dose of a gas generating tablet;
a second chamber group is disposed in the bottom case, the second chamber group includes a second chamber cup and a second cup, the second chamber cup has a through hole and is correspondingly fixed to The second ignition hole, the second drug chamber cup is filled with a second dose of a gas generating tablet, and the second cup shape corresponds to the second chamber cup and is disposed in the second medicine chamber Cup body
a first ignition device is disposed through the first ignition hole to be disposed in the first drug chamber, and receives a first ignition signal to generate a first ignition gas flow to trigger the first dose Producing gas ingots burning;
a second ignition device, the second ignition hole and the through hole are disposed in the second chamber cup, and receive a second ignition signal to generate a second ignition gas flow to trigger the second Dose of gas-producing ingot burning; An exhaust hood is disposed on the main casing and forms a deposition space with the main casing to accommodate solid residue generated after combustion, the exhaust hood having a plurality of vent holes for gas discharge . [Item 2] The two-stage hybrid gas generator according to claim 1, wherein the first medicine chamber group further comprises an adjustment flap for adjusting an accommodation space of the first medicine chamber. Further, the filling amount of the first dose of the gas generating tablet is adjusted. [Item 3] The two-stage hybrid gas generator according to claim 1, wherein the seal set comprises a cover and a sheet, the cover has a port and is disposed at an upper end of the center tube, the seal The sheet is fixed on the opening to block the escape of gas in the main casing, and the sealing piece is broken and opened when receiving a certain degree of thrust from the inner side. [Item 4] The two-stage hybrid gas generator of claim 1, wherein the first ignition set further comprises a first steering cover, the first steering cover is a hollow casing and is on a wall surface thereof The first steering cover is fixedly sleeved on the first ignition device, and the first guiding hole is used to guide the direction of the first ignition airflow. [Item 5] The two-stage hybrid gas generator according to claim 1, wherein the second ignition set further comprises a second steering cover, the second steering cover is a hollow casing and is single on the wall surface thereof. The second steering cover is fixedly sleeved on the second ignition hole, and the second guiding hole is used to guide the direction of the second ignition airflow. [Item 6] The two-stage hybrid gas generator of claim 4, wherein the first ignition set further comprises a baffle disposed outside the first steering cover to limit the first dose. The position of the gas-producing medicine ingot. [Item 7] The two-stage hybrid gas generator according to claim 1, further comprising a vent pipe, the vent pipe is sleeved on the outer side of the center pipe, and the vent pipe is provided with a plurality of throttling hole. [Item 8] The two-stage hybrid gas generator of claim 7, wherein the plurality of orifices and the plurality of convection holes are not aligned with each other. [Item 9] The two-stage hybrid gas generator according to claim 1, wherein the bottom of the first medicine chamber and/or the second medicine chamber cup further comprises a cushion to prevent the gas-producing tablet from shaking And broken. [Item 10] The two-stage hybrid gas generator according to claim 9, wherein the cushion comprises a ceramic fiber mat, a crochet mat or a heat-resistant rubber mat. [Item 11] The two-stage hybrid gas generator of claim 1, wherein the hood further comprises a screen to filter solid residue.