Gas generator and safety airbag

Abstract

The invention relates to the field of automobile safety air bags, in particular to a gas generator and a safety air bag. The gas generating part is arranged in the guide pipe, and the electric explosion unit is used for igniting the gas generating part, so that gas is quickly generated. When the gas generating piece is not ignited, the blocking piece blocks the barrel, the sealing performance of the gas generator is guaranteed, and gas leakage is avoided. When the gas generating part rapidly combusts to generate gas, the plugging part is stressed and is damaged under the action of force, so that the barrel is communicated with the outside, and the gas flows to the outside. According to the gas generator, a rupture disk and other structures are omitted, the structure is simpler, the cost is lower, the sealing performance is improved, gas leakage is avoided, and therefore the gas bag can be rapidly inflated.

Description

Technical Field

[0001] The present invention relates to the field of automobile safety airbags, and in particular to a gas generator and a safety airbag. Background Art

[0002] The hybrid airbag inflator is a technology that combines a pyrotechnic gas generator and a stored-gas gas generator. This inflator generates gas through the combustion of propellant and releases the gas stored in a pressure vessel to achieve rapid inflation of the airbag, enabling the airbag to provide sufficient cushioning force to protect passengers.

[0003] However, the existing gas generator mainly utilizes multiple bursting discs to release gas, which has a complex structure and high cost. In addition, since the multiple bursting discs need to be welded to the cylinder, the gas generator has poor sealing performance and a low product qualification rate. Summary of the invention

[0004] The objects of the present invention include, for example, providing a gas generator and an airbag with a simple structure, low cost, and high sealing performance to improve the product qualification rate.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides a gas generator, comprising:

[0007] Cylinder;

[0008] A catheter is arranged in the cylinder;

[0009] A gas generating component, the gas generating component is located in the conduit and is used to generate gas;

[0010] An electric explosion unit, which is connected to the cylinder and is used to ignite the gas-producing parts;

[0011] A plugging piece, which is connected to the cylinder and is used to plug the cylinder;

[0012] When the gas-producing component in the conduit burns rapidly to generate gas, the sealing component is damaged by force, so that the cylinder is connected to the outside.

[0013] In an optional embodiment, the blocking member is provided with a chamber, which is communicated with the outside; the blocking member includes a blocking portion and a blocking portion, the blocking portion is connected to the inner wall of the cylinder; the blocking portion is used to block the cylinder;

[0014] When the gas-generating component in the conduit burns rapidly to generate gas, the blocking portion is damaged by force, so that the cylinder and the chamber are connected.

[0015] In an optional embodiment, the gas generator further comprises a puncture needle, at least a portion of which is located within the catheter;

[0016] In the process of the gas generating member burning rapidly to generate gas, the puncture needle moves toward the blocking portion and punctures the blocking portion to connect the cylinder body with the chamber.

[0017] In an optional embodiment, the catheter is provided with a first through hole, and the catheter is connected to the cylinder through the first through hole; the needle is used to block or open the first through hole;

[0018] The gas generator further includes a throttle valve, which is located in the cylinder and connected to the inner wall of the cylinder and the blocking member; the throttle valve has a cavity, the throttle valve is provided with a second through hole, and the cavity is connected to the cylinder through the second through hole;

[0019] When the puncture needle moves toward the blocking portion, the first through hole opens so that the catheter is connected to the cylinder; the puncture needle pierces the blocking portion so that the cavity and the chamber are connected.

[0020] In an optional embodiment, the sealing portion is provided with an annular groove, and when the gas-producing member in the conduit burns rapidly to generate gas, the annular groove breaks to connect the cylinder and the chamber; the diameter of the annular groove is larger than the diameter of the port of the conduit.

[0021] In an optional embodiment, the conduit includes a first pipeline and a second pipeline, the first pipeline and the second pipeline are connected; the gas producing part is accommodated in the first pipeline, and the second pipeline is used to transport gas;

[0022] A protrusion protruding toward the axis of the first pipeline is provided at the connection point between the first pipeline and the second pipeline, and the protrusion abuts against the gas producing part.

[0023] In an optional embodiment, the electric explosion unit further includes a partition, an injection-molded electric explosion tube, a sealing member and a metal core, wherein the partition is connected to the inner wall of the cylinder; the injection-molded electric explosion tube is located on the side of the partition away from the conduit, and the injection-molded electric explosion tube is connected to the partition; the sealing member is connected to the partition and is used to block the port of the accommodating groove; the metal core is sleeved on the injection-molded electric explosion tube; the metal core is provided with a plurality of exhaust grooves arranged circumferentially around its axis;

[0024] The partition is provided with a receiving groove for receiving the charge, and the receiving groove is communicated with the first pipeline; the injection-molded electric detonator is used for receiving the charge.

[0025] In an optional embodiment, the amount of charge in the injection-molded electric squib has a margin of 75% or 125%.

[0026] In an optional embodiment, the acceptor charge includes an acceptor charge and a main charge, the acceptor charge includes ultrafine A5, hexanitrostilbene and JO-11C, and the main charge includes metal powder and an oxidizer.

[0027] In a second aspect, the present invention provides a safety airbag, comprising an airbag and a gas generator as described in any one of the aforementioned embodiments, wherein the airbag is connected to a blocking member.

[0028] The beneficial effects of the embodiments of the present invention include, for example:

[0029] The gas generator generates gas quickly by placing a gas-producing component in the conduit and using an electric explosion unit to ignite the gas-producing component. When the gas-producing component is not ignited, the sealing component seals the cylinder to ensure the sealing of the gas generator and prevent gas leakage. When the gas-producing component burns rapidly to generate gas, the sealing component is subjected to force, causing itself to be destroyed under the action of the force, thereby connecting the cylinder to the outside world and allowing the gas to flow to the outside world. The gas generator reduces structures such as bursting discs, has a simpler structure, lower cost, and improved sealing to prevent gas leakage, thereby achieving rapid inflation of the airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A cross-sectional view of a gas generator provided by an embodiment of the present invention;

[0032] Figure 2 A gas flow diagram of a gas generator provided by an embodiment of the present invention;

[0033] Figure 3 for Figure 1 A partial enlarged view of the middle A;

[0034] Figure 4 A cross-sectional view of a gas generator provided for another embodiment of the present invention;

[0035] Figure 5 A gas flow diagram of a gas generator provided for other embodiments of the present invention;

[0036] Figure 6 A cross-sectional view of a sealing member of a gas generator provided in another embodiment of the present invention;

[0037] Figure 7 for Figure 4 A partial enlarged view of point B in the middle;

[0038] Figure 8 A schematic structural diagram of a sealing portion of a gas generator provided in another embodiment of the present invention;

[0039] Fig. 9 for Figure 4 A partial enlarged view of point C in the middle;

[0040] Fig.10 for Figure 1 A partial enlarged view of point D in the middle;

[0041] Fig.11 A schematic structural diagram of a metal core provided in an embodiment of the present invention.

[0042] Icons: 100-gas generator; 110-cylinder; 120-conduit; 121-first through hole; 122-first pipe; 123-second pipe; 124-protrusion; 130-gas producing part; 140-electric explosion unit; 141-partition; 101-accommodating groove; 142-receiving charge; 1421-receiving main charge; 1422-main charge; 143-injection molded electric explosion tube; 144-sealing part; 145-metal core; 1451-exhaust groove; 150-blocking part; 151-chamber; 152-blocking part; 153-resisting part; 154-annular groove; 160-puncture needle; 170-throttle valve; 171-cavity; 172-second through hole. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0046] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0048] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0049] The present invention provides a safety airbag, which includes an airbag and a gas generator 100, wherein the gas generator 100 is connected to the airbag. The gas generator 100 can quickly generate gas to inflate the airbag, so that the airbag expands quickly, thereby providing sufficient cushioning force to protect passengers.

[0050] Please refer to Figure 1-Figure 3 , Figure 1 A cross-sectional view of a gas generator 100 provided in an embodiment of the present invention; Figure 2 A gas flow diagram of a gas generator 100 provided in an embodiment of the present invention; Figure 3 for Figure 1 A partial enlarged view of point A in the middle.

[0051] The gas generator 100 in the airbag will be described in detail below:

[0052] The gas generator 100 includes a cylinder 110, a conduit 120, a gas-producing part 130, an electric explosion unit 140, and a plugging part 150. The conduit 120 is disposed in the cylinder 110. The gas-producing part 130 is located in the conduit 120 and is used to generate gas. The electric explosion unit 140 is connected to the cylinder 110 and is used to ignite the gas-producing part 130. The plugging part 150 is connected to the cylinder 110 and is used to plug the cylinder 110, wherein when the gas-producing part 130 in the conduit 120 burns rapidly to generate gas, the plugging part 150 is damaged by force so that the cylinder 110 is connected to the outside.

[0053] Since the blocking member 150 is connected to the airbag, after the blocking member 150 is damaged by force, the conduit 120 is connected to the airbag, so that gas enters the airbag. It can be understood that the gas generating member 130 in the present invention can quickly generate a large amount of gas after being heated, thereby realizing rapid inflation of the airbag.

[0054] It should be noted that, in this embodiment, the cylinder 110 is filled with inert gas to provide a portion of gas, and the inflation pressure is 30-50 MPa. In addition, the inert gas can carry some heat to reduce the temperature of the gas generated by the gas producing part 130. In this embodiment, the cylinder 110 is provided with a through hole, and the staff can fill the cylinder 110 with inert gas through the through hole.

[0055] The working principle of the gas generator 100 is as follows:

[0056] The electric explosion unit 140 is energized to ignite the gas generating member 130. After the gas generating member 130 generates gas, the gas flows along the axis direction of the conduit 120. The gas content in the conduit 120 increases, causing the blocking member 150 to be damaged by force, thereby connecting the cylinder 110 to the outside. Since the airbag is connected to the blocking member 150, the gas flows out of the conduit 120 and enters the airbag, thereby expanding the airbag and providing sufficient buffering force to protect the passengers.

[0057] It should be noted that the present invention eliminates the bursting disc structure in the prior art, thereby making its structure simpler and reducing costs. In addition, since the bursting disc is connected to the inner wall of the cylinder by welding, the sealing is poor and the gas is easily leaked.

[0058] The blocking piece 150 in the present invention is connected to the cylinder 110. It can be understood that the blocking piece 150 is located on the outside of the catheter 120, and the blocking piece 150 covers the port of the catheter 120, thereby improving the sealing performance and the qualified rate of the product, avoiding gas leakage, and ensuring the rapid expansion of the airbag and the safety of frequent passengers.

[0059] For further information, please refer to Figure 1-Figure 3 The sealing member 150 is provided with a chamber 151, and the chamber 151 is communicated with the outside; the sealing member 150 includes a sealing portion 152 and a resisting portion 153, and the resisting portion 153 is connected to the inner wall of the cylinder 110; the sealing portion 152 is used to seal the cylinder 110; when the gas-producing member 130 in the conduit 120 burns rapidly to generate gas, the sealing portion 152 is damaged by force, so that the cylinder 110 and the chamber 151 are communicated.

[0060] Specifically, the resisting portion 153 is connected to the airbag, and the chamber 151 is connected to the airbag, so that after the blocking portion 152 is destroyed by force, the catheter 120 and the airbag are connected, so that the gas can enter the chamber 151 from the catheter 120 and then enter the airbag from the chamber 151 to achieve rapid inflation of the airbag.

[0061] It should be noted that after the blocking portion 152 is damaged by force, some fragments will be generated. The present invention uses the blocking portion 153 to prevent the fragments from entering the airbag, thereby damaging the airbag and causing harm to the passengers, thereby improving safety.

[0062] Furthermore, the blocking member 150 in the present invention is integrally processed to reduce welding processes, improve the sealing performance of the blocking member 150 and the qualified rate of the product, thereby avoiding gas leakage and guiding the gas into the airbag so that the airbag can expand quickly to protect the passengers.

[0063] Based on the above, please refer to Figure 1-Figure 3 In an embodiment of the present invention, the gas generator 100 further includes a needle 160, at least a portion of which is located in the conduit 120; wherein, during the process of rapid combustion of the gas producing part 130 to generate gas, the needle 160 moves toward the blocking portion 152 and punctures the blocking portion 152 to connect the cylinder 110 with the chamber 151.

[0064] It can be understood that after the gas-generating part 130 is heated to generate gas, the gas drives the needle 160 to move along the axis of the catheter 120 toward the direction of the blocking portion 152, thereby causing the needle 160 to pierce the blocking portion 152, that is, the blocking portion 152 is destroyed by the piercing force of the needle 160, so that the catheter 120 and the chamber 151 are connected, and the gas enters the chamber 151 from the catheter 120, and then enters the airbag to expand the airbag.

[0065] According to the above structure, the gas generator 100 further includes a throttle valve 170, which is located in the cylinder 110 and connected to the inner wall of the cylinder 110 and the blocking member 150. The throttle valve 170 has a cavity 171, and the throttle valve 170 is provided with a second through hole 172, and the cavity 171 is connected to the cylinder 110 through the second through hole 172. When the needle 160 moves toward the blocking portion 152, the first through hole 121 is opened so that the conduit 120 is connected to the cylinder 110; the needle 160 pierces the blocking portion 152 so that the cavity 171 is connected to the chamber 151.

[0066] Specifically, when the electric explosion unit 140 does not ignite the drug-producing part, the needle 160 blocks the first through hole 121, so that the conduit 120 is in a closed state. After the drug-producing part is heated to generate gas, the needle 160 moves along the axial direction of the conduit 120 driven by the gas, so that the first through hole 121 is opened, and then the gas can flow into the cylinder 110 through the first through hole 121.

[0067] It should be noted that, since the gas generating member 130 in this embodiment uses chemicals, during the flow process, in addition to the gas generated by the gas generating member 130, some solids will also flow out simultaneously. In this embodiment, the throttle valve 170 is set to make the gas and the solids produce a baffle, that is, due to the difference in mass between the solids and the gas, the solids and the gas turn at different positions, so that the solids are retained, thereby achieving the purpose of filtering.

[0068] Thus, the gas flows through the conduit 120, the first through hole 121, the cylinder 110, the second through hole 172, the cavity 171 and the chamber 151 in sequence, and finally flows into the airbag, thereby achieving rapid inflation of the airbag.

[0069] For further information, please refer to Figure 1-Figure 8 , Figure 4 A cross-sectional view of a gas generator 100 provided in another embodiment of the present invention; Figure 5 A gas flow diagram of a gas generator 100 provided for other embodiments of the present invention; Figure 6 A cross-sectional view of a sealing member 150 of a gas generator 100 provided in another embodiment of the present invention; Figure 7 for Figure 4 A partial enlarged view of point B in the middle; Figure 8 A schematic structural diagram of a sealing portion 152 of a gas generator 100 provided in another embodiment of the present invention.

[0070] In other embodiments of the present invention, the sealing portion 152 is provided with an annular groove 154. When the gas-producing component 130 in the conduit 120 burns rapidly to generate gas, the annular groove 154 breaks so that the cylinder 110 and the chamber 151 are connected; the diameter of the annular groove 154 is larger than the diameter of the port of the conduit 120.

[0071] It is understandable that the thickness of the annular groove 154 is less than the thickness of other parts of the blocking portion 152, so that the stress that the annular groove 154 can withstand is less than that of other parts. When the gas-generating part 130 is heated, a large amount of gas is generated. When the gas contacts the blocking part 150, it applies a certain pressure to the blocking part 150. Since the pressure applied by the gas to the blocking part 150 is greater than the pressure that the blocking part 150 can withstand, the blocking part 150 is broken. In addition, since the stress that the annular groove 154 can withstand is less than that of other parts, the blocking part 150 will crack at the annular groove 154, thereby forming an opening, and the cylinder 110 and the conduit 120 are connected to the chamber 151 through the opening, so that the gas can flow into the airbag.

[0072] It should be noted that, in this embodiment, the diameter of the annular groove 154 is larger than the conduit 120 , so that the pressure applied by the gas is concentrated at the center of the annular groove 154 , thereby causing the blocking member 150 to break at the annular groove 154 .

[0073] Based on the above settings, please refer to Figure 1-Figure 9 , Fig. 9 for Figure 4The enlarged view of the part at C in the middle. The conduit 120 includes a first pipe 122 and a second pipe 123, the first pipe 122 and the second pipe 123 are connected; the gas producing part 130 is accommodated in the first pipe 122, and the second pipe 123 is used to transport gas; the connection between the first pipe 122 and the second pipe 123 is provided with a protrusion 124 protruding toward the axis of the first pipe 122, and the protrusion 124 abuts against the gas producing part 130.

[0074] Specifically, in this embodiment, at least part of the needle 160 is located in the second pipe 123 . The second pipe 123 is provided with a first through hole 121 . The needle 160 is used to close or open the first through hole 121 .

[0075] It should be noted that the gas generating member 130 in this embodiment uses a mesoporous drug, the outer diameter of which is slightly smaller than the inner diameter of the first pipe 122, and after being installed, it is concentric with the first pipe 122. The mesoporous drug serves as an exhaust channel, and the gas after combustion is discharged from the mesoporous drug.

[0076] In order to prevent the gas-producing component 130 from moving along the axis of the first pipe 122 with the gas, a protrusion 124 is provided to abut against the gas-producing component 130 to limit the position of the gas-producing component 130, thereby preventing the distance between the electric explosion units 140 from being too large, resulting in insufficient combustion of the gas-producing component 130 or failure to ignite the gas-producing component 130, thereby causing the airbag to fail to inflate and cause harm to the passengers.

[0077] In this embodiment, the axis of the first pipe 122 coincides with the axis of the second pipe 123 , thereby increasing the flow velocity of the gas to achieve rapid inflation of the airbag.

[0078] For further information, please refer to Figure 1-Figure 10 , Fig.10 for Figure 1 The partial enlarged view of the D in the middle. The electric explosion unit 140 includes a partition 141 and an injection-molded electric explosion tube 143, the partition 141 is connected to the inner wall of the cylinder 110; the injection-molded electric explosion tube 143 is located on the side of the partition 141 away from the guide tube 120, and the injection-molded electric explosion tube 143 is connected to the partition 141; the partition 141 is provided with a receiving groove 101 for receiving the charge 142, and the receiving groove 101 is connected to the first pipeline 122; the injection-molded electric explosion tube 143 is used to receive the charge.

[0079] Specifically, the accommodating groove 101 is arranged on a side away from the injection-molded electric detonator 143 . It can be understood that the charging charge and the receiving charge 142 are respectively located on opposite sides of the partition 141 , that is, the charging charge and the receiving charge 142 are separated by the partition 141 .

[0080] After receiving the current pulse signal, the injection-molded electric detonator 143 uses the charge to detonate to generate a shock wave for the partition 141. The charge 142 in the receiving groove 101 is stimulated by the shock wave, thereby igniting the gas-producing component 130, and then the gas-producing component 130 is heated to generate a large amount of gas.

[0081] It should be noted that injection molded electric squib 143 needs to be close to partition 141 to eliminate the influence of the gap on the shock wave, and the amount of the applied medicine in injection molded electric squib 143 needs to be within a margin of 75% or 125%.

[0082] The types of the receiving charge 142 are the receiving charge 1421 and the main charge 1422. The receiving charge 1421 is ultrafine A5, hexanitrostilbene, JO-11C, etc., which is used as the agent for shock wave excitation and ignition. The main charge 1422 is composed of metal powder and oxidant such as aluminum powder, iron powder, titanium powder, boron powder, and oxidant. The main charge 1422 is used to provide energy and ignite the gas generating charge.

[0083] According to the above configuration, in this embodiment, the electric explosion unit 140 further includes a seal 144, which is connected to the partition 141 and is used to block the port of the receiving tank 101. It should be noted that the seal 144 in this embodiment is an aluminum foil. Since the receiving charge 142 is a powder-converted drug, in order to prevent the receiving charge 142 from being dispersed and mixed with the gas-generating part 130 to affect the gas production efficiency, the aluminum foil is set to separate the two, so that the receiving tank 101 and the conduit 120 are closed. After being impacted by the shock wave, the aluminum foil breaks.

[0084] Please refer to Figure 1-Figure 11 , Fig.11 A schematic diagram of the structure of the metal core 145 provided in an embodiment of the present invention. The electric explosion unit 140 also includes a metal core 145, which is sleeved on the injection-molded electric explosion tube 143 to strengthen the strength of the injection-molded electric explosion tube 143 and prevent the injection-molded electric explosion tube 143 from detaching after being impacted by the shock wave. Since gas is generated after the chemical reaction of the applied medicine occurs, a plurality of exhaust grooves 1451 arranged circumferentially around the axis of the metal core 145 are required to be provided to facilitate the exhaust of gas.

[0085] The steps for installing the gas generator 100 provided in the embodiment of the present invention are as follows:

[0086] 1. Place the injection-molded electric squib 143 close to the partition 141 and securely connect the injection-molded electric squib 143 and the partition 141.

[0087] 2. First load the acceptor charge 1421 into the receiving groove 101, then load the main charge 1422, and finally stick the aluminum foil to complete the assembly of the ignition part.

[0088] 3. The electric explosion unit 140 is fixedly connected to the cylinder 110 .

[0089] 4. Insert the gas producing component 130 into the first pipe 122 , fix the gas producing component 130 by using the protrusion 124 , and make the first pipe 122 communicate with the containing groove 101 .

[0090] 5. Install the throttle valve 170 , partially sleeve the throttle valve 170 on the second pipe 123 , and insert the needle 160 into the second pipe 123 so that the needle 160 closes the first through hole 121 .

[0091] 6. Install the blocking member 150 so that the blocking member 150 blocks the second conduit 120 .

[0092] 7. Fill the through hole with inert gas. After it is full, install the steel ball to seal the through hole to complete the assembly.

[0093] The installation steps of the gas generator 100 provided in other embodiments of the present invention are as follows:

[0094] 1. Place the injection-molded electric squib 143 close to the partition 141 and securely connect the injection-molded electric squib 143 and the partition 141.

[0095] 2. First load the acceptor charge 1421 into the receiving groove 101, then load the main charge 1422, and finally stick the aluminum foil to complete the assembly of the ignition part.

[0096] 3. The electric explosion unit 140 is fixedly connected to the cylinder 110 .

[0097] 4. Insert the gas producing component 130 into the first pipe 122 , fix the gas producing component 130 by using the protrusion 124 , and make the first pipe 122 communicate with the containing groove 101 .

[0098] 5. Install the blocking member 150 so that the annular groove 154 is located on the outer circumference of the conduit 120 .

[0099] 6. Fill the through hole with inert gas. After it is full, install the steel ball to seal the through hole to complete the assembly.

[0100] In summary, the gas generator 100 quickly generates gas by arranging a gas-producing component 130 in the conduit 120 and using the electric explosion unit 140 to ignite the gas-producing component 130. Before the gas fills the conduit 120, the blocking component 150 blocks the cylinder 110 to ensure the sealing of the conduit 120 and prevent gas leakage. When the gas fills the conduit 120, the blocking component 150 is subjected to force, causing itself to be destroyed under the action of the force, thereby connecting the cylinder 110 to the outside world and allowing the gas to flow to the outside world. The gas generator 100 reduces structures such as bursting discs, has a simpler structure, lower cost, and improves sealing, prevents gas leakage, and thus achieves rapid inflation of the airbag.

[0101] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A gas generator, characterized in that: include: A cylinder (110); A conduit (120), wherein the conduit (120) is disposed in the cylinder (110); A gas generating component (130), the gas generating component (130) is located in the conduit (120), and the gas generating component (130) is used to generate gas; An electric explosion unit (140), the electric explosion unit (140) being connected to the cylinder (110), and the electric explosion unit (140) being used to ignite the gas-generating component (130); a blocking member (150), the blocking member (150) being connected to the cylinder (110), and the blocking member (150) being used to block the cylinder (110); When the gas-generating component (130) in the conduit (120) burns rapidly to generate gas, the blocking component (150) is damaged by force, so that the cylinder (110) is connected to the outside.

2. The gas generator according to claim 1, characterized in that: The blocking member (150) is provided with a chamber (151), and the chamber (151) is in communication with the outside; the blocking member (150) comprises a blocking portion (152) and a blocking portion (153), and the blocking portion (153) is connected to the inner wall of the cylinder (110); the blocking portion (152) is used to block the cylinder (110); When the gas generating member (130) in the conduit (120) burns rapidly to generate gas, the blocking portion (152) is damaged by force, thereby allowing the cylinder (110) and the chamber (151) to communicate with each other.

3. The gas generator according to claim 2, characterized in that: The gas generator (100) further comprises a puncture needle (160), at least a portion of which is located within the conduit (120); In the process of the gas generating component (130) rapidly burning to generate gas, the puncture needle (160) moves toward the blocking portion (152) and punctures the blocking portion (152) to connect the cylinder (110) with the chamber (151).

4. The gas generator according to claim 3, characterized in that: The conduit (120) is provided with a first through hole (121), and the conduit (120) is connected to the cylinder (110) through the first through hole (121); the puncture needle (160) is used to block or open the first through hole (121); The gas generator (100) further comprises a throttle valve (170), the throttle valve (170) being located in the cylinder (110), and the throttle valve (170) being connected to the inner wall of the cylinder (110) and the blocking member (150); the throttle valve (170) having a cavity (171), the throttle valve (170) being provided with a second through hole (172), and the cavity (171) being connected to the cylinder (110) through the second through hole (172); When the puncture needle (160) moves toward the blocking portion (152), the first through hole (121) opens so that the conduit (120) is connected to the cylinder (110); the puncture needle (160) pierces the blocking portion (152) so that the cavity (171) and the chamber (151) are connected.

5. The gas generator according to claim 2, characterized in that: The sealing portion (152) is provided with an annular groove (154). When the gas producing part (130) in the conduit (120) burns rapidly to generate gas, the annular groove (154) breaks so that the cylinder (110) and the chamber (151) are connected. The diameter of the annular groove (154) is greater than the diameter of the port of the conduit (120).

6. The gas generator according to any one of claims 1 to 5, characterized in that: The conduit (120) comprises a first pipeline (122) and a second pipeline (123), wherein the first pipeline (122) and the second pipeline (123) are in communication; the gas producing component (130) is accommodated in the first pipeline (122), and the second pipeline (123) is used for conveying gas; A protrusion (124) protruding toward the axis of the first pipe (122) is provided at the connecting point between the first pipe (122) and the second pipe (123), and the protrusion (124) abuts against the gas generating part (130).

7. The gas generator according to claim 6, characterized in that: The electric explosion unit (140) further comprises a partition (141), an injection-molded electric explosion tube (143), a sealing member (144) and a metal core (145); the partition (141) is connected to the inner wall of the cylinder (110); the injection-molded electric explosion tube (143) is located on a side of the partition (141) away from the conduit (120), and the injection-molded electric explosion tube (143) is connected to the partition (141); the sealing member (144) is connected to the partition (141) and is used to block the port of the accommodating groove (101); the metal core (145) is sleeved on the injection-molded electric explosion tube (143); the metal core (145) is provided with a plurality of exhaust grooves (1451) circumferentially arranged around its axis; The partition (141) is provided with a receiving groove (101) for receiving the charged charge (142), and the receiving groove (101) is communicated with the first pipe (122); the injection-molded electric detonator (143) is used for receiving the charged charge.

8. The gas generator according to claim 7, characterized in that: The amount of medicine loaded in the injection-molded electric squib (143) has a margin of 75% or 125%.

9. The gas generator according to claim 7, characterized in that: The acceptor charge (142) includes an acceptor charge (1421) and a main charge (1422), wherein the acceptor charge (1421) includes ultrafine A5, hexanitrostilbene and JO-11C, and the main charge (1422) includes metal powder and an oxidizer.

10. A safety airbag, characterized in that: It comprises an airbag and a gas generator (100) as claimed in any one of claims 1 to 9, wherein the airbag is connected to the sealing member (150).

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