Trigger device and airbag device
By using a triggering device to change the position of the trigger element during battery transportation to control the inflation of the airbag, the high cost and low response issues caused by high-precision components in the prior art are solved, achieving low-cost and efficient battery transportation protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-26
- Publication Date
- 2026-03-13
AI Technical Summary
In the current battery transportation process, the airbag inflation device requires high-precision components and has a slow response time, making it prone to failure, resulting in high transportation protection costs and insufficient reliability.
The airbag inflation is controlled by changing the position of the trigger relative to the piston using a triggering device, avoiding the use of a firing pin and ignition cap. The piston movement is triggered by inertia or magnetic induction, simplifying the manufacturing and assembly process.
It reduces the manufacturing and assembly costs of the airbag inflation device, improves triggering time and reliability, and ensures that the battery can be quickly inflated for protection during a collision.
Smart Images
Figure CN223990380U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery protection technology, and in particular to triggering devices and airbag devices. Background Technology
[0002] After the battery is manufactured, it needs to be transported to facilitate its assembly with other electrical devices such as automobiles. During transportation, the battery requires protection to reduce the risk of damage or thermal runaway in the event of a collision. Currently, most methods involve surrounding the battery with airbags for transport protection.
[0003] In related technologies, airbag inflation mostly occurs under specific triggering conditions, where an ignition structure ignites, leading to a deflagration reaction and the generation of a large amount of gas, which is then introduced into the airbag. However, this design typically includes multiple high-precision components such as springs, firing pins, and ignition caps, resulting in high manufacturing and assembly costs. Furthermore, the long mechanical transmission path leads to a slow response time, affecting triggering efficiency. Additionally, the ignition cap and the deflagration compounds are prone to failure under long-term storage conditions. Utility Model Content
[0004] In view of the above problems, this application provides a triggering device and an airbag device, which makes the inflation of the airbag simpler, the manufacturing and assembly cost of the whole device is lower, the triggering time is faster, and the risk of failure is not high.
[0005] In a first aspect, this application provides a triggering device, which includes a mounting body, a piston, and a triggering element. The mounting body has a receiving cavity and an exhaust passage; the piston is housed in the receiving cavity and can slide relative to the cavity wall along a first preset direction, the piston dividing the receiving cavity into a first chamber and a second chamber along the first preset direction; the exhaust passage communicates with the second chamber; the triggering element is located in the first chamber and has a first position and a second position relative to the piston; in the first position, the triggering element is separated from the piston; in the second position, the triggering element abuts against the piston and can push the piston toward the side closer to the exhaust passage, so that the gas in the second chamber is output from the exhaust passage.
[0006] When the air outlet channel of the triggering device provided in this embodiment is connected to the airbag, and the airbag is used to protect the battery during transportation, the position of the trigger relative to the piston is the first position. During transportation, if the transport vehicle experiences a collision, sudden braking, or rollover, the trigger, due to inertia, switches from the first position to the second position, causing it to contact the piston and push the piston towards the side closer to the air outlet channel. This allows gas in the second chamber to be output from the air outlet channel into the airbag, inflating it and thus providing cushioning protection for the battery. This reduces the risk of battery damage or thermal runaway after a collision. Because this device inflates the airbag by changing the position of the trigger relative to the piston, it does not require the cooperation of high-precision components such as a firing pin or ignition cap. Therefore, the manufacturing and assembly cost of the entire device is lower, and the triggering time is faster. Furthermore, it does not require the participation of compounds involved in a deflagration reaction, reducing the risk of trigger failure and increasing reliability.
[0007] In some embodiments, the maximum cross-sectional projected area S1 of the air outlet channel in a plane perpendicular to the first preset direction is smaller than the minimum cross-sectional projected area S2 of the second chamber in a plane perpendicular to the first preset direction.
[0008] By setting the maximum cross-sectional projection area S1 of the air outlet channel in a plane perpendicular to the first preset direction to be smaller than the minimum cross-sectional projection area S2 of the second chamber in a plane perpendicular to the first preset direction, when the piston moves toward the side facing the air outlet channel and the piston lowers its height by a small amount, a large amount of gas can quickly enter the airbag connected to the air outlet channel from the air outlet channel, and the airbag can be quickly inflated.
[0009] In some embodiments, the triggering device further includes a first elastic member; the first elastic member is disposed in the second chamber and deformably abuts against the piston and the mounting body along a first preset direction.
[0010] By abutting the piston against the first elastic element in the second chamber, the first elastic element can buffer the movement of the piston through its own elastic deformation, making the movement of the piston more stable and smooth.
[0011] In some embodiments, the triggering device further includes a first carrier member installed in a first chamber and having a first carrier cavity with an opening; in a first position, the trigger member is located in the first carrier cavity; under preset conditions, the trigger member can slide out of the first carrier cavity and abut against the piston to switch from the first position to a second position.
[0012] When a transport vehicle collides, brakes suddenly, or overturns, the trigger element in the first bearing chamber will slide out due to inertia and then fall under gravity until it comes into contact with the piston, thereby pushing the piston to move towards the side closer to the air outlet.
[0013] In some embodiments, the first support member includes a first bottom wall and a first side wall extending upward from the periphery of the first bottom wall, the first bottom wall and the first side wall together defining a first support cavity having an opening at the top.
[0014] The first bearing cavity with an opening at the top is defined by the first bottom wall and the first side wall, which makes the structure of the first bearing member relatively simple, and the trigger member can easily slide in the first bearing cavity and slide out of the first bearing cavity under the action of inertial impact.
[0015] In some embodiments, the triggering device includes a rotatable plate, which is at least partially housed within a first chamber; in a first position, a trigger member is supported on the side of the rotatable plate opposite to the piston; when the rotatable plate rotates about its own axis of rotation in a second preset direction, it can form a moving channel with the side wall of the first chamber, so that the trigger member passes through the moving channel and abuts against the piston.
[0016] In the first position, the trigger is supported on the side of the rotatable plate opposite to the piston, preventing it from falling off due to the obstruction of the rotatable plate and allowing it to engage between the rotatable plate and the side wall of the first chamber. When the rotatable plate rotates around its own axis in a second preset direction, the distance between the end of the rotatable plate away from the axis and the side wall of the first chamber increases, forming a moving channel. When the width of this moving channel is greater than the maximum size of the trigger, the trigger can pass through the moving channel and fall until it abuts against the piston, thus facilitating the switch from the first position to the second position.
[0017] In some embodiments, the rotatable plate is inclinedly disposed in the first cavity; the triggering device includes a second elastic member, which is deformably connected between the side wall of the accommodating cavity and the rotatable plate; and in a first position, the second elastic member is disposed on the side of the rotatable plate opposite to the triggering member.
[0018] By placing the second elastic element on the side of the rotatable plate away from the trigger element, and placing the second elastic element between the side wall of the receiving cavity and the rotatable plate, a supporting force can be applied to the rotatable plate through the second elastic element, and the rotatable plate can also rotate with the connection point with the second elastic element as the rotation fulcrum. At the same time, the second elastic element can also play a buffering role when the rotatable plate rotates, making the rotation process of the rotatable plate more stable.
[0019] In some embodiments, the triggering device includes a driving component; the driving component is used to drive the rotatable plate to rotate about its own rotation axis in a second preset direction under preset conditions.
[0020] When a transport vehicle collides, brakes suddenly, or overturns, the drive assembly is triggered to start, which in turn drives the rotatable plate to rotate around its own rotation axis in a second preset direction, so that the trigger can switch from the first position to the second position, thereby inflating the airbag.
[0021] In some embodiments, the driving component includes an electromagnetic induction coil assembly and a ferromagnetic element. The ferromagnetic element is disposed on one side of the electromagnetic induction coil assembly; the ferromagnetic element is connected to one end of the rotatable plate; under preset conditions, the electromagnetic induction coil assembly can conduct and generate a magnetic field, and the ferromagnetic element is attracted by a magnetic force and moves toward the side closer to the electromagnetic induction coil assembly, thereby driving the rotatable plate to rotate around its own rotation axis in a second preset direction.
[0022] When a transport vehicle is involved in a collision, sudden braking, or overturning, the electromagnetic induction coil assembly is activated and generates a magnetic field. At this time, the ferromagnetic component is attracted by the magnetic force and moves under the action of the magnetic force. This causes the rotatable plate to rotate around its own rotation axis in a second preset direction, switching from the second position to the first position. The movement process is relatively simple.
[0023] In some embodiments, the driving assembly includes a second carrier, a movable member, and two sets of circuit trigger interfaces. The second carrier has a second carrier cavity; the movable member is at least partially housed within the second carrier cavity and is slidable relative to the cavity wall of the second carrier cavity, and the movable member is a conductive member; the two sets of circuit trigger interfaces are spaced apart on the cavity wall of the second carrier cavity, and the two sets of circuit trigger interfaces are connected to the energizing circuit of the electromagnetic induction coil assembly, so that the energizing circuit of the electromagnetic induction coil assembly is disconnected at the two sets of circuit trigger interfaces; wherein, under preset conditions, the movable member slides relative to the cavity wall of the second carrier cavity, so that the movable member electrically connects the two sets of circuit trigger interfaces and conducts the energizing circuit of the electromagnetic induction coil assembly.
[0024] Through the cooperation of the second carrier, the two sets of circuit trigger interfaces, and the movable part that acts as a conductive part, when the transport vehicle collides, brakes suddenly, or overturns, the movable part in the second carrier cavity will slide under the action of inertia, so that the movable part can simultaneously abut against the two sets of circuit trigger interfaces and achieve electrical connection, thereby conducting the power circuit of the electromagnetic induction coil assembly, so that the electromagnetic induction coil assembly generates a magnetic field, which in turn drives the rotatable plate to rotate around its own rotation axis in the second preset direction through the ferromagnetic part, so that the trigger element switches from the second position to the first position, and finally realizes the inflation operation of the airbag.
[0025] In some embodiments, the second carrier includes a first conductive part, a second conductive part, and an insulating ring disposed between the first conductive part and the second conductive part. The first conductive part is in ohmic contact with one set of circuit trigger interfaces; the second conductive part is spaced apart from the first conductive part and is in ohmic contact with the other set of circuit trigger interfaces; wherein the first conductive part, the second conductive part, and the insulating ring together form a second carrier cavity; under preset conditions, a movable member slides relative to the cavity wall of the second carrier cavity, so that the movable member passes over the insulating ring and simultaneously abuts against the first conductive part and the second conductive part, so that the two sets of circuit trigger interfaces are electrically connected and the energizing circuit of the electromagnetic induction coil assembly is turned on.
[0026] By configuring the second carrier as a separate structure comprising a first conductive part, an insulating ring, and a second conductive part, and insulating the two conductive structures with the insulating ring, when the transport vehicle collides, brakes suddenly, or overturns, the movable part slides relative to the cavity wall of the second carrier cavity under inertia. This allows the movable part to pass over the insulating ring and simultaneously abut against the first and second conductive parts, electrically connecting them. This, in turn, electrically connects the two sets of circuit trigger interfaces, thus energizing the electromagnetic induction coil assembly and causing it to generate a magnetic field. The entire process relies on external force to trigger the movement of the movable part, thereby triggering the circuit to conduct and generate a magnetic field. The structure is simple and has a fast response speed.
[0027] In some embodiments, the minimum size of the movable member is greater than the distance between the first conductive part and the second conductive part. This allows the movable member to simultaneously abut against the first and second conductive parts as it passes the insulating ring, thereby electrically connecting the first and second conductive parts.
[0028] In some embodiments, the first chamber is configured with at least one ventilation passage communicating with the first chamber.
[0029] By setting a ventilation channel connected to the first chamber, the air pressure in the first chamber can be connected with the external environment, thereby avoiding the phenomenon of piston movement jamming or stagnation caused by inconsistent air pressure.
[0030] Secondly, this application also provides an airbag device, which includes the triggering device described in any of the above embodiments, and further includes an airbag; the airbag is connected to an air outlet channel.
[0031] When the airbag device provided in this application protects the battery during transportation, the position of the trigger relative to the piston is in the first position. During transportation, if the transport vehicle experiences a collision, sudden braking, or rollover, the trigger, due to inertia, switches from the first position to the second position, causing it to contact the piston and push it towards the side closer to the air outlet channel. This allows gas in the second chamber to be output from the air outlet channel into the airbag, inflating it and thus providing cushioning protection for the battery. This reduces the risk of battery damage or thermal runaway after a collision. Because this device inflates the airbag by changing the position of the trigger relative to the piston, it does not require the cooperation of high-precision components such as a firing pin or ignition cap. Therefore, the manufacturing and assembly cost of the entire device is lower, and the triggering time is faster. Furthermore, it does not require the participation of compounds involved in a deflagration reaction, reducing the risk of trigger failure and increasing reliability.
[0032] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description
[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:
[0034] Figure 1 This is a schematic diagram of a triggering device provided in some embodiments of this application.
[0035] Figure 2 for Figure 1 The diagram shows the internal structure of the triggering device.
[0036] Figure 3 This is a schematic diagram of a triggering device provided in some embodiments of this application.
[0037] Figure 4 for Figure 3 A magnified view of a portion at point A shown.
[0038] Figure 5 for Figure 3 The diagram shows the internal structure of the triggering device.
[0039] The reference numerals in the detailed embodiments are as follows:
[0040] 100 - Mounting body; 110 - Receiving cavity; 111 - First chamber; 1111 - Ventilation passage; 112 - Second chamber; 120 - Air outlet passage;
[0041] 200-piston;
[0042] 300-Trigger;
[0043] 400 - First elastic element;
[0044] 500 - First load-bearing component; 510 - First load-bearing cavity;
[0045] 600 - Rotatable plate;
[0046] 700 - Second elastic element;
[0047] 800 - Drive assembly; 810 - Electromagnetic induction coil assembly; 811 - Power supply; 812 - Electromagnetic induction coil body; 820 - Ferromagnetic component; 830 - Second carrier component; 830a - Second carrier cavity; 831 - First conductive part; 832 - Second conductive part; 833 - Insulating ring; 834 - Connector; 840 - Movable part; 850 - Two sets of circuit trigger interfaces; 851 - First set of circuit trigger interfaces; 852 - Second set of circuit trigger interfaces. Detailed Implementation
[0048] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.
[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0050] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.
[0051] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0052] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0053] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).
[0054] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0055] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0056] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.
[0057] After the power battery is manufactured, it needs to be transported to facilitate its assembly with other electrical devices such as automobiles. During transportation, the power battery requires protection to reduce the risk of damage or thermal runaway in the event of a collision. Currently, most methods involve surrounding the power battery with airbags for transport protection.
[0058] In related technologies, airbag inflation mostly occurs under specific triggering conditions, where an ignition structure ignites, leading to a deflagration reaction and the generation of a large amount of gas, which is then introduced into the airbag. However, this design typically includes multiple high-precision components such as springs, firing pins, and ignition caps, resulting in high manufacturing and assembly costs. Furthermore, the long mechanical transmission path leads to a slow response time, affecting triggering efficiency. Additionally, the ignition cap and the deflagration compounds are prone to failure under long-term storage conditions.
[0059] Based on the above considerations, in order to make the airbag inflation process of the power battery transportation device simpler, reduce the manufacturing and assembly cost of the entire device, achieve faster triggering, and reduce the risk of failure, this application provides a triggering device. By changing the position of the trigger relative to the piston, the movement of the piston is controlled, thereby realizing the physical control of the airbag inflation. This makes the airbag inflation simpler, reduces the manufacturing and assembly cost of the entire device, achieves faster triggering, and reduces the risk of failure.
[0060] The airbag device assembled with the triggering device and airbag disclosed in this application embodiment can provide transportation protection for the power battery, which can be a primary battery or a secondary battery. The power battery can be used in, but is not limited to, electrical devices such as vehicles, ships, or aircraft. Specifically, the electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.
[0061] Please see Figure 1 and Figure 2 ,as well as Figure 3 and Figure 5 , Figure 1 A schematic diagram of a triggering device provided in some embodiments of this application is shown. Figure 2 It shows Figure 1 The diagram shows the internal structure of the triggering device. Figure 3 A schematic diagram of a triggering device provided in some embodiments of this application is shown. Figure 5 It shows Figure 3 The diagram shows the internal structure of the triggering device.
[0062] In some embodiments, the triggering device includes a mounting body 100, a piston 200, and a trigger element 300. The mounting body 100 has a receiving cavity 110 and an air outlet passage 120; the piston 200 is received within the receiving cavity 110 and is capable of sliding relative to the cavity wall of the receiving cavity 110 along a first preset direction, and the piston 200 divides the receiving cavity 110 into a first chamber 111 and a second chamber 112 along the first preset direction; exemplarily, the first preset direction can be... Figure 1 and Figure 2 ,as well as Figure 3 and Figure 5 The gas outlet passage 120 is connected to the second chamber 112 in the z direction; the trigger 300 is located in the first chamber 111 and has a first position and a second position relative to the piston 200; in the first position, the trigger 300 is separated from the piston 200; in the second position, the trigger 300 abuts against the piston 200 and can push the piston 200 toward the side closer to the gas outlet passage 120 so that the gas in the second chamber 112 is output from the gas outlet passage 120.
[0063] The mounting body 100 can be a structure of any shape with a cavity, such as a cubic structure or a columnar structure, without any special limitation.
[0064] Piston 200 can be used as follows Figure 2 and Figure 5 The cubic structure shown can also be a cylindrical structure, etc. There are no special restrictions on its shape, as long as it can be adapted to the shape of the cavity 110 and can be defined relative to the cavity wall of the cavity 110.
[0065] The piston 200 divides the receiving cavity 110 into an independent first chamber 111 and a second chamber 112 along a first preset direction. This causes the piston 200 to be subjected to the downward pressure of gravity of the trigger 300 when the trigger 300 comes into contact with the piston 200, thereby causing the piston 200 to move toward the side closer to the inflation channel. This causes the gas in the second chamber 112 to be compressed and output from the outlet channel 120.
[0066] The trigger 300 is a movable structural component, such as a spherical or block-shaped structure. In some embodiments, such as... Figure 2 and Figure 5 As shown, the trigger 300 can be a sphere, which makes it easy to roll and more flexible.
[0067] The triggering device can be installed in a direction perpendicular to the normal forward direction of the transport vehicle, with the first position positioned above the second position along the vertical projection. This allows the trigger element 300 to move from the first position to the second position due to gravity and inertia. Alternatively, the triggering device can be installed in other directions, enabling multi-faceted risk avoidance against various transportation risks encountered by the transport vehicle during operation.
[0068] When the air outlet channel 120 of the triggering device provided in this embodiment is connected to the airbag, and the airbag is used to protect the battery during transportation, the position of the trigger 300 relative to the piston 200 is in the first position. During transportation, if the transport vehicle experiences a collision, sudden braking, or rollover, the trigger 300, due to inertia, switches from the first position to the second position, causing the trigger 300 to come into contact with the piston 200. This pushes the piston 200 towards the side closer to the air outlet channel 120, allowing gas in the second chamber 112 to be output from the air outlet channel 120 into the airbag, inflating the airbag and thus providing cushioning protection for the battery. This reduces the risk of battery damage or thermal runaway after a collision. Since this device is triggered by changing the position of the trigger 300 relative to the piston 200 when inflating the airbag, it does not require the cooperation of high-precision components such as the firing pin and ignition cap. Therefore, the manufacturing and assembly cost of the entire device is lower, and the triggering time is faster. At the same time, it does not require the participation of compounds in the deflagration reaction, which reduces the risk of triggering failure and makes it more reliable.
[0069] The following is a detailed description of the structure of the triggering device. Please refer to [link / reference needed]. Figure 4 , Figure 4 It shows Figure 3 A magnified view of a portion at point A shown.
[0070] Please see Figure 2 and Figure 5 In some embodiments, the maximum cross-sectional projected area S1 of the air outlet channel 120 in a plane perpendicular to the first preset direction is smaller than the minimum cross-sectional projected area S2 of the second chamber 112 in a plane perpendicular to the first preset direction; exemplarily, the plane perpendicular to the first preset direction is the plane perpendicular to the first preset direction. Figure 2 and Figure 5 The plane shown is parallel to the xy plane.
[0071] The size of the maximum cross-sectional projected area S1 of the exhaust channel 120 perpendicular to the preset plane can reflect the maximum cross-sectional airflow rate when the airflow passes through the exhaust channel 120. When the exhaust channel 120 is as follows... Figure 2 and Figure 5When the annular structure is shown, the maximum cross-sectional projection area of the air outlet channel 120 in the plane perpendicular to the first preset direction is the cross-sectional area of the through hole inside the annular structure.
[0072] The minimum cross-sectional projected area S2 of the second chamber 112 in the plane perpendicular to the first preset direction can reflect the volume of the second chamber 112, i.e., the gas storage capacity, when the height of the second chamber 112 is uniform. When the second chamber 112 is as follows... Figure 2 and Figure 5 When the cube structure is shown, the minimum cross-sectional projection of the second chamber 112 on the plane perpendicular to the first preset direction is the second chamber 112 along... Figure 2 and Figure 5 The product of the length in the x-direction and the width in the y-direction.
[0073] By setting the maximum cross-sectional projection area S1 of the air outlet channel 120 in the plane perpendicular to the first preset direction to be smaller than the minimum cross-sectional projection area S2 of the second chamber 112 in the plane perpendicular to the first preset direction, when the piston 200 moves toward the side facing the air outlet channel 120, when the piston 200 lowers a small height, a large amount of gas can quickly enter the airbag connected to the air outlet channel 120 from the air outlet channel 120, and the airbag can be quickly inflated.
[0074] Please see Figure 2 and Figure 5 In some embodiments, the triggering device further includes a first elastic element 400; the first elastic element 400 is disposed in the second chamber 112, and the first elastic element 400 deformably abuts against the piston 200 and the mounting body 100 along a first preset direction.
[0075] The first elastic element 400 can be a stretchable spring or a deformable sponge, etc.
[0076] By abutting the first elastic element 400 between the piston 200 and the mounting body 100 in the second chamber 112, the first elastic element 400 can buffer the movement of the piston 200 through its own elastic deformation, so that the movement of the piston 200 is relatively smooth.
[0077] Please see Figure 2 In some embodiments, the triggering device further includes a first carrier 500, which is installed in the first chamber 111 and has a first carrier cavity 510 with an opening; in the first position, the trigger 300 is located in the first carrier cavity 510; under preset conditions, the trigger 300 can slide out from the first carrier cavity 510 and abut against the piston 200 to switch from the first position to the second position.
[0078] The cavity wall of the first bearing cavity 510 can be an arc-shaped structure, thereby allowing the trigger 300 to slide out easily. For example, the first bearing 500 can be a bowl-shaped structure, and the trigger 300 can be a spherical structure, thereby allowing the trigger 300 to roll and slide out easily within the first bearing cavity 510.
[0079] The preset condition can be when the transport vehicle is in a collision, sudden braking or overturning danger. When the transport vehicle is in a collision, sudden braking or overturning situation, the trigger 300 in the first bearing cavity 510 will slide out under the action of inertia, and then fall under the action of gravity until it comes into contact with the piston 200, thereby pushing the piston 200 to move towards the side closer to the air outlet passage 120.
[0080] Please see Figure 2 In some embodiments, the first support member 500 includes a first bottom wall and a first side wall extending upward from the periphery of the first bottom wall, the first bottom wall and the first side wall together defining a first support cavity 510 with an opening at the top.
[0081] The first support member 500 can be a hollow hemispherical structure. Thus, the first bottom wall is the bottom wall of the hollow hemisphere, the first side wall is the side wall of the hollow hemisphere, and the hollow internal structure of the hollow hemisphere forms the first support cavity 510.
[0082] The first bearing cavity 510 with an opening at the top is defined by the first bottom wall and the first side wall, which makes the structure of the first bearing member 500 relatively simple, and the trigger member 300 can easily slide in the first bearing cavity 510 and slide out of the first bearing cavity 510 under the action of inertial impact.
[0083] Please see Figure 5 In some embodiments, the triggering device includes a rotatable plate 600. The rotatable plate 600 is at least partially housed within the first chamber 111; in a first position, the trigger 300 is supported on the side of the rotatable plate 600 opposite to the piston 200; when the rotatable plate 600 rotates about its own axis of rotation in a second preset direction, it can form a moving channel with the side wall of the first chamber 111, so that the trigger 300 passes through the moving channel and abuts against the piston 200; exemplaryly, the second preset direction is a counterclockwise direction.
[0084] The rotatable plate 600 may be entirely located within the first chamber 111, or only partially located within the first chamber 111; there are no special restrictions on this.
[0085] In the first position, the trigger 300 rests on the side of the rotatable plate 600 opposite to the piston 200, thus preventing the trigger 300 from falling off due to the obstruction of the rotatable plate 600, and also allowing it to be engaged between the rotatable plate 600 and the side wall of the first chamber 111. When the rotatable plate 600 rotates around its own axis of rotation in a second preset direction (counterclockwise), the distance between the end of the rotatable plate 600 away from the axis of rotation and the side wall of the first chamber 111 increases, thereby forming a moving channel. When the width of this moving channel is greater than the maximum size of the trigger 300, the trigger 300 can fall through the moving channel until it abuts against the piston 200, thus achieving a convenient switch from the first position to the second position.
[0086] Please see Figure 5 In some embodiments, the rotatable plate 600 is inclinedly disposed in the first chamber 111; the triggering device includes a second elastic member 700, which is deformably connected between the side wall of the accommodating chamber 110 and the rotatable plate 600; and in a first position, the second elastic member 700 is disposed on the side of the rotatable plate 600 away from the triggering member 300.
[0087] The tilt angle of the rotatable plate 600 relative to the first chamber 111 is not specifically limited. It is sufficient that the rotatable plate 600 can support the trigger 300 in the first position so that the trigger 300 does not fall into contact with the piston 200.
[0088] The rotatable plate 600 is tilted relative to the first chamber 111, so that when triggered by preset conditions, the rotatable plate 600 can continue to rotate along the tilted posture.
[0089] The second elastic element 700 can be a stretchable spring or a deformable sponge, etc.
[0090] By setting the second elastic element 700 on the side of the rotatable plate 600 away from the trigger 300, and deformably setting the second elastic element 700 between the side wall of the receiving cavity 110 and the rotatable plate 600, a supporting force can be applied to the rotatable plate 600 through the second elastic element 700, and the rotatable plate 600 can also rotate with the connection point with the second elastic element 700 as the rotation fulcrum. At the same time, the second elastic element 700 can also play a buffering role when the rotatable plate 600 rotates, making the rotation process of the rotatable plate 600 more stable.
[0091] Please see Figures 3-5 In some embodiments, the triggering device includes a drive assembly 800; the drive assembly 800 is used to drive the rotatable plate 600 to rotate about its own rotation axis in a second preset direction under preset conditions.
[0092] The preset condition can be when the transport vehicle is in a collision, sudden braking, or rollover danger. When the transport vehicle is in a collision, sudden braking, or rollover situation, the drive assembly 800 will be triggered to start, which will cause the drive assembly 800 to drive the rotatable plate 600 to rotate around its own rotation axis in a second preset direction, so that the trigger 300 can switch from the first position to the second position, thereby inflating the airbag.
[0093] Please see Figure 3 and Figure 5 In some embodiments, the drive assembly 800 includes an electromagnetic induction coil assembly 810 and a ferromagnetic element 820. The ferromagnetic element 820 is disposed on one side of the electromagnetic induction coil assembly 810; the ferromagnetic element 820 is connected to one end of the rotatable plate 600. Figure 5 (As shown); Under preset conditions, the electromagnetic induction coil assembly 810 can be turned on and generate a magnetic field, and the ferromagnetic component 820 is attracted by the magnetic force and moves toward the side closer to the electromagnetic induction coil assembly 810, so as to drive the rotatable plate 600 to rotate around its own rotation axis in a second preset direction.
[0094] The ferromagnetic component 820 can be fabricated using a ferromagnetic material structure, thereby enabling the ferromagnetic component 820 to be attracted by a magnetic force and move under electromagnetic induction. For example, the ferromagnetic component 820 can be made of materials such as pure iron / low carbon steel, nickel, cobalt, silicon steel, cast iron, carbon steel, tool steel, or permalloy (nickel-iron alloy).
[0095] When a collision, sudden braking, or overturning occurs in the transport vehicle, the electromagnetic induction coil assembly 810 is turned on and generates a magnetic field. At this time, the ferromagnetic component 820 is attracted by the magnetic force and moves under the action of the magnetic force. This causes the rotatable plate 600 to rotate around its own rotation axis in a second preset direction, switching from the second position to the first position. The movement process is relatively simple.
[0096] Please see Figures 3-5In some embodiments, the drive assembly 800 includes a second carrier 830, a movable member 840, and two sets of circuit trigger interfaces 850. The second carrier 830 is configured with a second carrier cavity 830a; the movable member 840 is at least partially housed within the second carrier cavity 830a and is slidable relative to the cavity wall of the second carrier cavity 830a, and the movable member 840 is a conductive member; the two sets of circuit trigger interfaces 850 are spaced apart on the cavity wall of the second carrier cavity 830a, and the two sets of circuit trigger interfaces 850 are connected to the energizing circuit of the electromagnetic induction coil assembly 810, so that the energizing circuit of the electromagnetic induction coil assembly 810 is disconnected at the two sets of circuit trigger interfaces 850; wherein, under preset conditions, the movable member 840 slides relative to the cavity wall of the second carrier cavity 830a, so that the movable member 840 is electrically connected to the two sets of circuit trigger interfaces 850 and conducts the energizing circuit of the electromagnetic induction coil assembly 810.
[0097] The movable part 840 can be made of a conductive material, such as metal.
[0098] The cavity wall of the second bearing cavity 830a can be an arc-shaped structure, thereby allowing the movable member 840 to slide out easily. Exemplarily, the second bearing member 830 can be a bowl-like structure, and the movable member 840 can be a spherical structure, thereby allowing the movable member 840 to roll and slide out easily within the second bearing cavity 830a.
[0099] The electromagnetic induction coil assembly 810 may include a power supply 811 and an electromagnetic induction coil body 812. The power supply 811 is electrically connected to the electromagnetic induction coil body 812 and disconnected at two sets of circuit trigger interfaces 850. When the two sets of circuit trigger interfaces 850 are connected and conductive through contact with an external conductive structure, the circuit of the entire electromagnetic induction coil assembly 810 becomes conductive, thereby enabling the electromagnetic induction coil body 812 to generate a magnetic field. For example, the positive terminal of the power supply 811 is connected to the first set of circuit trigger interfaces 851, the negative terminal of the power supply 811 is connected to one end of the electromagnetic induction coil body 812, and the other end of the electromagnetic induction coil body 812 is connected to the second set of circuit trigger interfaces 852. This disconnects the circuit connecting the power supply 811 and the electromagnetic induction coil body 812 at the two sets of circuit trigger interfaces 850.
[0100] For example, the first set of circuit trigger interfaces 851 may include at least one interface terminal, and the second set of circuit trigger interfaces 852 may include at least one interface terminal.
[0101] Through the cooperation of the second carrier 830, the two sets of circuit trigger interfaces 850, and the movable part 840 as a conductive part, when the transport vehicle collides, brakes suddenly, or overturns, the movable part 840 in the second carrier cavity 830a will slide under the action of inertia, so that the movable part 840 can simultaneously abut against the two sets of circuit trigger interfaces 850 and achieve electrical connection, thereby conducting the power circuit of the electromagnetic induction coil assembly 810, so that the electromagnetic induction coil assembly 810 generates a magnetic field, which in turn drives the rotatable plate 600 to rotate around its own rotation axis in the second preset direction through the ferromagnetic part 820, so that the trigger 300 switches from the second position to the first position, and finally realizes the inflation operation of the airbag.
[0102] Please see Figures 3-5 In some embodiments, the second carrier 830 includes a first conductive part 831, a second conductive part 832, and an insulating ring 833 disposed between the first conductive part 831 and the second conductive part 832. The first conductive part 831 is in ohmic contact with one set of circuit trigger interfaces; the second conductive part 832 is spaced apart from the first conductive part 831 and is in ohmic contact with the other set of circuit trigger interfaces; wherein the first conductive part 831, the second conductive part 832, and the insulating ring 833 together form a second carrier cavity 830a; under preset conditions, the movable part 840 slides relative to the cavity wall of the second carrier cavity 830a, so that the movable part 840 passes over the insulating ring 833 and simultaneously abuts against the first conductive part 831 and the second conductive part 832, so that the two sets of circuit trigger interfaces 850 are electrically connected and the energizing circuit of the electromagnetic induction coil assembly 810 is turned on.
[0103] The first conductive part 831, the insulating ring 833, and the second conductive part 832 can together form a hollow hemispherical structure, and the hollow structure inside the hollow hemispherical forms the second bearing cavity 830a.
[0104] The first conductive part 831 and the second conductive part 832 can be made of metal. The insulating ring 833 can be made of rubber.
[0105] By configuring the second carrier 830 as a separate structure comprising the first conductive part 831, the insulating ring 833, and the second conductive part 832, and by insulating the two conductive structures with the insulating ring 833, when the transport vehicle collides, brakes suddenly, or overturns, the movable part 840 slides relative to the cavity wall of the second carrier cavity 830a under inertia. This allows the movable part 840 to pass over the insulating ring 833 and simultaneously abut against the first conductive part 831 and the second conductive part 832. This electrically connects the first conductive part 831 and the second conductive part 832 through the conductive movable part 840, thereby electrically connecting the two sets of circuit trigger interfaces 850. This conducts the energizing circuit of the electromagnetic induction coil assembly 810, causing the electromagnetic induction coil assembly 810 to generate a magnetic field. The entire process relies on external force to trigger the movement of the movable part 840, thereby triggering the circuit to conduct and generate a magnetic field. The structure is simple and has a fast response speed.
[0106] In some embodiments, the minimum size of the movable member 840 is greater than the distance between the first conductive part 831 and the second conductive part 832. This allows the movable member 840 to simultaneously abut against the first conductive part 831 and the second conductive part 832 when passing over the insulating ring 833, thereby electrically connecting the first conductive part 831 and the second conductive part 832.
[0107] Please see Figure 1 and Figure 3 In some embodiments, the first chamber 111 is provided with at least one ventilation channel 1111 communicating with the first chamber 111.
[0108] Ventilation channel 1111 can be as follows Figure 1 The multiple vents spaced apart as shown can also be, for example... Figure 3 The open annular groove shown is not specifically limited in this respect.
[0109] By providing a ventilation channel 1111 connected to the first chamber 111, the air pressure in the first chamber 111 can be connected with the external environment, thereby avoiding the phenomenon of piston 200 movement jamming or stagnation caused by inconsistent air pressure.
[0110] Please see Figure 1 and Figure 2The triggering device provided in some embodiments of this application includes a mounting body 100, a piston 200, a trigger member 300, a first elastic member 400, and a first bearing member 500. The mounting body 100 has a receiving cavity 110 and an air outlet channel 120. The piston 200 is received within the receiving cavity 110 and can slide relative to the cavity wall of the receiving cavity 110 along a first preset direction. The piston 200 divides the receiving cavity 110 into a first chamber 111 and a second chamber 112 along the first preset direction. Exemplarily, the first preset direction can be... Figure 1 and Figure 2 The first chamber 112 is located in the z-direction of the first chamber 111 and has a first position and a second position relative to the piston 200. In the first position, the trigger 300 is separated from the piston 200. In the second position, the trigger 300 abuts against the piston 200 and can push the piston 200 to move towards the side closer to the outlet channel 120, so that the gas in the second chamber 112 is output from the outlet channel 120. Furthermore, the maximum cross-sectional projected area S1 of the outlet channel 120 in the plane perpendicular to the first preset direction is smaller than the minimum cross-sectional projected area S2 of the second chamber 112 in the plane perpendicular to the first preset direction. The first elastic member 400 is disposed in the second chamber 112 and deformably abuts against the piston 200 and the mounting body 100 along the first preset direction. The first support member 500 is installed in the first chamber 111, and the first support member 500 is constructed with a first support cavity 510 having an opening; in the first position, the trigger member 300 is located in the first support cavity 510; under preset conditions, the trigger member 300 can slide out from the first support cavity 510 and abut against the piston 200 to switch from the first position to the second position.
[0111] When the air outlet channel 120 of the triggering device provided in this embodiment is connected to the airbag, and the airbag is used to protect the battery during transportation, the position of the trigger 300 relative to the piston 200 is the first position. However, during transportation, if the transport vehicle experiences a collision, sudden braking, or rollover, the trigger 300 in the first bearing chamber 510 will switch from the first position to the second position due to inertia. This causes the trigger 300 to come into contact with the piston 200, pushing the piston 200 towards the side closer to the air outlet channel 120. This allows gas in the second chamber 112 to be output from the air outlet channel 120 into the airbag, inflating it and thus providing cushioning protection for the battery. This reduces the risk of battery damage or thermal runaway after a collision.
[0112] Meanwhile, since the maximum cross-sectional projected area S1 of the air outlet channel 120 in the plane perpendicular to the first preset direction is set to be smaller than the minimum cross-sectional projected area S2 of the second chamber 112 in the plane perpendicular to the first preset direction, when the piston 200 moves towards the side of the air outlet channel 120 and the piston 200 lowers by a small height, a larger amount of gas can quickly enter the airbag connected to the air outlet channel 120 from the air outlet channel 120, and the airbag can be quickly inflated. Furthermore, because the piston 200 abuts against the first elastic member 400 between itself and the mounting body 100 in the second chamber 112, the first elastic member 400 can buffer the movement of the piston 200 through its own elastic deformation, making the movement of the piston 200 more stable and smooth.
[0113] Since this device is triggered by changing the position of the trigger 300 relative to the piston 200 when inflating the airbag, it does not require the cooperation of high-precision components such as the firing pin and ignition cap. Therefore, the manufacturing and assembly cost of the entire device is lower, and the triggering time is faster. At the same time, it does not require the participation of compounds in the deflagration reaction, which reduces the risk of triggering failure and makes it more reliable.
[0114] Please see Figures 3-5 The triggering device provided in some embodiments of this application includes a mounting body 100, a piston 200, a trigger element 300, a first elastic element 400, a rotatable plate 600, a second elastic element 700, and a drive assembly 800. The mounting body 100 has a receiving cavity 110 and an air outlet channel 120. The piston 200 is received within the receiving cavity 110 and can slide relative to the cavity wall of the receiving cavity 110 along a first preset direction. The piston 200 divides the receiving cavity 110 into a first chamber 111 and a second chamber 112 along the first preset direction. Exemplarily, the first preset direction can be... Figure 3 and Figure 5 The first chamber 112 is located in the z-direction of the first chamber 111 and has a first position and a second position relative to the piston 200. In the first position, the trigger 300 is separated from the piston 200. In the second position, the trigger 300 abuts against the piston 200 and can push the piston 200 to move towards the side closer to the outlet channel 120, so that the gas in the second chamber 112 is output from the outlet channel 120. Furthermore, the maximum cross-sectional projected area S1 of the outlet channel 120 in the plane perpendicular to the first preset direction is smaller than the minimum cross-sectional projected area S2 of the second chamber 112 in the plane perpendicular to the first preset direction. The first elastic member 400 is disposed in the second chamber 112 and deformably abuts against the piston 200 and the mounting body 100 along the first preset direction.
[0115] Meanwhile, the rotatable plate 600 is inclinedly disposed within the first chamber 111; in the first position, the trigger 300 is supported on the side of the rotatable plate 600 opposite to the piston 200; when the rotatable plate 600 rotates around its own rotation axis in a second preset direction, it can form a moving channel with the side wall of the first chamber 111, so that the trigger 300 passes through the moving channel and abuts against the piston 200. The second elastic member 700 is deformably connected between the side wall of the accommodating cavity 110 and the rotatable plate 600; and in the first position, the second elastic member 700 is disposed on the side of the rotatable plate 600 opposite to the trigger 300.
[0116] The drive assembly 800 includes an electromagnetic induction coil assembly 810, a ferromagnetic component 820, a second support component 830, a movable component 840, and two sets of circuit trigger interfaces 850. The ferromagnetic component 820 is disposed on one side of the electromagnetic induction coil assembly 810; the ferromagnetic component 820 is connected to one end of the rotatable plate 600. Figure 5 (As shown); Under preset conditions, the second carrier 830 is configured with a second carrier cavity 830a; the movable member 840 is at least partially housed within the second carrier cavity 830a and is capable of sliding relative to the cavity wall of the second carrier cavity 830a, and the movable member 840 is a conductive member; two sets of circuit trigger interfaces 850 are spaced apart on the cavity wall of the second carrier cavity 830a, and the two sets of circuit trigger interfaces 850 are connected to the energizing circuit of the electromagnetic induction coil assembly 810, so that the energizing circuit of the electromagnetic induction coil assembly 810 is disconnected at the two sets of circuit trigger interfaces 850. Under preset conditions, the movable member 840 slides relative to the cavity wall of the second bearing cavity 830a, so that the movable member 840 is electrically connected to the two sets of circuit trigger interfaces 850 and conducts the power-on circuit of the electromagnetic induction coil assembly 810. After the electromagnetic induction coil assembly 810 is turned on, it generates a magnetic field, and the ferromagnetic member 820 is attracted by the magnetic force and moves toward the side closer to the electromagnetic induction coil assembly 810, so as to drive the rotatable plate 600 to rotate around its own rotation axis in the second preset direction.
[0117] When the air outlet channel 120 of the triggering device provided in this embodiment is connected to the airbag, and the airbag is used to protect the battery during transportation, the position of the trigger 300 relative to the piston 200 is in the first position. During transportation, if the transport vehicle experiences a collision, sudden braking, or rollover, the trigger 300, due to inertia, switches from the first position to the second position, causing the trigger 300 to come into contact with the piston 200. This pushes the piston 200 towards the side closer to the air outlet channel 120, allowing gas in the second chamber 112 to be output from the air outlet channel 120 into the airbag, inflating the airbag and thus providing cushioning protection for the battery. This reduces the risk of battery damage or thermal runaway after a collision.
[0118] By setting the maximum cross-sectional projection area S1 of the air outlet channel 120 in the plane perpendicular to the first preset direction to be smaller than the minimum cross-sectional projection area S2 of the second chamber 112 in the plane perpendicular to the first preset direction, when the piston 200 moves toward the side facing the air outlet channel 120, when the piston 200 lowers a small height, a large amount of gas can quickly enter the airbag connected to the air outlet channel 120 from the air outlet channel 120, and the airbag can be quickly inflated.
[0119] By abutting the first elastic element 400 between the piston 200 and the mounting body 100 in the second chamber 112, the first elastic element 400 can buffer the movement of the piston 200 through its own elastic deformation, so that the movement of the piston 200 is relatively smooth.
[0120] In the first position, the trigger 300 rests on the side of the rotatable plate 600 opposite to the piston 200, thus preventing the trigger 300 from falling off due to the obstruction of the rotatable plate 600, and also allowing it to be engaged between the rotatable plate 600 and the side wall of the first chamber 111. When the rotatable plate 600 rotates around its own axis of rotation in a second preset direction (counterclockwise), the distance between the end of the rotatable plate 600 away from the axis of rotation and the side wall of the first chamber 111 increases, thereby forming a moving channel. When the width of this moving channel is greater than the maximum size of the trigger 300, the trigger 300 can fall through the moving channel until it abuts against the piston 200, thus achieving a convenient switch from the first position to the second position.
[0121] Furthermore, by placing the second elastic element 700 on the side of the rotatable plate 600 away from the trigger element 300, and deformably placing the second elastic element 700 between the side wall of the receiving cavity 110 and the rotatable plate 600, a supporting force can be applied to the rotatable plate 600 through the second elastic element 700, and the rotatable plate 600 can also rotate with the connection point with the second elastic element 700 as the rotation fulcrum. At the same time, the second elastic element 700 can also play a buffering role when the rotatable plate 600 rotates, making the rotation process of the rotatable plate 600 more stable.
[0122] Through the cooperation of the electromagnetic induction coil assembly 810, the ferromagnetic component 820, the second carrier component 830, the two sets of circuit trigger interfaces 850, and the movable component 840 as a conductive component, when the transport vehicle collides, brakes suddenly, or overturns, the movable component 840 in the second carrier cavity 830a will slide under inertia, thereby allowing the movable component 840 to simultaneously abut against the two sets of circuit trigger interfaces 850 and achieve electrical connection, thus conducting the power circuit of the electromagnetic induction coil assembly 810, so that the electromagnetic induction coil assembly 810 generates a magnetic field, which in turn drives the rotatable plate 600 to rotate around its own rotation axis in a second preset direction through the ferromagnetic component 820, so that the trigger component 300 switches from the second position to the first position, and finally realizes the inflation operation of the airbag.
[0123] Since this device is triggered by changing the position of the trigger 300 relative to the piston 200 when inflating the airbag, it does not require the cooperation of high-precision components such as the firing pin and ignition cap. Therefore, the manufacturing and assembly cost of the entire device is lower, and the triggering time is faster. At the same time, it does not require the participation of compounds in the deflagration reaction, which reduces the risk of triggering failure and makes it more reliable.
[0124] This application also provides an airbag device, which includes the triggering device described in any of the above embodiments, and further includes an airbag; the airbag is connected to the air outlet channel 120. When the airbag device provided in this application protects the battery during transportation, the position of the trigger 300 relative to the piston 200 is in the first position. When the transport vehicle is in danger of collision, sudden braking, or rollover during transportation, the trigger 300 switches from the first position to the second position due to inertia, causing the trigger 300 to abut against the piston 200, thereby pushing the piston 200 to move towards the side closer to the air outlet channel 120, so that the gas in the second chamber 112 is output from the air outlet channel 120 to the airbag to inflate the airbag, thereby providing buffer protection for the battery after inflation. This reduces the risk of battery damage or thermal runaway after a collision. Since this device is triggered by changing the position of the trigger 300 relative to the piston 200 when inflating the airbag, it does not require the cooperation of high-precision components such as the firing pin and ignition cap. Therefore, the manufacturing and assembly cost of the entire device is lower, and the triggering time is faster. At the same time, it does not require the participation of compounds in the deflagration reaction, which reduces the risk of triggering failure and makes it more reliable.
[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A trigger device, characterized in that The trigger device comprises: a mounting body (100) configured with a containing cavity (110) and provided with an air outlet channel (120); a piston (200) contained in the containing cavity (110) and capable of sliding along a first preset direction relative to the cavity wall of the containing cavity (110), the piston (200) separating the containing cavity (110) into a first chamber (111) and a second chamber (112) along the first preset direction, the air outlet channel (120) being in communication with the second chamber (112); and a trigger piece (300) located in the first chamber (111) and having a first position and a second position relative to the piston (200); in the first position, the trigger piece (300) is separated from the piston (200); in the second position, the trigger piece (300) abuts against the piston (200) and is capable of pushing the piston (200) to move towards a side close to the air outlet channel (120) so as to make the gas in the second chamber (112) output from the air outlet channel (120).
2. The trigger device of claim 1, wherein, The maximum cross-sectional projection area S1 of the air outlet channel (120) in a plane perpendicular to the first preset direction is smaller than the minimum cross-sectional projection area S2 of the second chamber (112) in a plane perpendicular to the first preset direction.
3. The trigger device of claim 1, wherein, The trigger device further comprises a first elastic piece (400); the first elastic piece (400) is arranged in the second chamber (112) and elastically abuts between the piston (200) and the mounting body (100) along the first preset direction.
4. The trigger device of any one of claims 1-3, wherein, The trigger device further comprises a first bearing piece (500) mounted in the first chamber (111) and configured with a first bearing cavity (510) having an opening; in the first position, the trigger piece (300) is located in the first bearing cavity (510); under a preset condition, the trigger piece (300) is capable of sliding out of the first bearing cavity (510) and abutting against the piston (200) so as to switch from the first position to the second position.
5. The trigger device of claim 4, wherein, The first bearing piece (500) comprises a first bottom wall and a first side wall extending upward from the periphery of the first bottom wall, and the first bottom wall and the first side wall jointly define the first bearing cavity (510) having an opening at the top end.
6. The trigger device of any one of claims 1-3, wherein, The trigger device comprises: a rotatable plate (600) at least partially contained in the first chamber (111); in the first position, the trigger piece (300) is borne on a side of the rotatable plate (600) away from the piston (200); when the rotatable plate (600) rotates along a second preset direction about its own rotation axis, a movement channel is formed between the rotatable plate (600) and the side wall of the first chamber (111) so as to make the trigger piece (300) pass through the movement channel and abut against the piston (200).
7. The trigger device of claim 6, wherein, The rotatable plate (600) is obliquely arranged in the first chamber (111). The trigger device comprises a second elastic member (700) which is flexibly connected between the side wall of the accommodating cavity (110) and the rotatable plate (600); and in the first position, the second elastic member (700) is arranged on the side of the rotatable plate (600) which is away from the trigger member (300).
8. The trigger device of claim 6, wherein, The trigger device comprises a driving assembly (800); The driving assembly (800) is used for driving the rotatable plate (600) to rotate along the second preset direction around its own rotation axis under a preset condition.
9. The trigger device of claim 8, wherein, The driving assembly (800) comprises: an electromagnetic induction coil assembly (810); and a ferromagnetic member (820) which is arranged on the side of the electromagnetic induction coil assembly (810) and is connected with one end of the rotatable plate (600); Under the preset condition, the electromagnetic induction coil assembly (810) can be conducted and generate a magnetic field, the ferromagnetic member (820) is subjected to a magnetic attraction force and moves towards the side close to the electromagnetic induction coil assembly (810) to drive the rotatable plate (600) to rotate along the second preset direction around its own rotation axis.
10. The trigger device of claim 9, wherein, The driving assembly (800) comprises: a second bearing member (830) which is configured with a second bearing cavity (830a); a movable member (840) which is at least partially accommodated in the second bearing cavity (830a) and can slide relative to the cavity wall of the second bearing cavity (830a), the movable member (840) being a conductive member; and two groups of circuit trigger interfaces (850) which are arranged on the cavity wall of the second bearing cavity (830a) at intervals, the two groups of circuit trigger interfaces (850) being connected to the conduction circuit of the electromagnetic induction coil assembly (810) so that the conduction circuit of the electromagnetic induction coil assembly (810) is disconnected at the two groups of circuit trigger interfaces (850); Under the preset condition, the movable member (840) slides relative to the cavity wall of the second bearing cavity (830a) so that the movable member (840) electrically connects the two groups of circuit trigger interfaces (850) and conducts the conduction circuit of the electromagnetic induction coil assembly (810).
11. The trigger device of claim 10, wherein, The second bearing member (830) comprises: a first conductive subpart (831) which is in ohmic contact with one of the two groups of circuit trigger interfaces; a second conductive subpart (832) which is arranged at intervals with the first conductive subpart (831) and is in ohmic contact with the other group of circuit trigger interfaces; and an insulating ring (833) which is arranged between the first conductive subpart (831) and the second conductive subpart (832); The first conductive subpart (831), the second conductive subpart (832) and the insulating ring (833) together enclose the second bearing cavity (830a); Under the preset condition, the movable piece (840) slides relative to the cavity wall of the second bearing cavity (830a) to make the movable piece (840) pass through the insulating ring (833) and abut against the first and second conducting subparts (831, 832) at the same time, so that the two groups of circuit trigger interfaces (850) are electrically connected, and the energization circuit of the electromagnetic induction coil assembly (810) is turned on.
12. The trigger device of any of claims 1-3, 5, 7-11, wherein, The first cavity (111) is configured with at least one air passage (1111) communicating with the first cavity (111).
13. An airbag device characterized by comprising: The trigger device of any one of claims 1-12, further comprising an air bag; The air bag communicates with the air outlet passage (120).