Controllers, airbag systems, and vehicles

Abstract

This application relates to a controller, an airbag system, and a vehicle. The controller includes a housing and a circuit board. The housing includes a first housing, a second housing, and a connector. The first housing and the second housing are connected and together define a receiving cavity. The connector is located outside the receiving cavity, and the first housing and the second housing are positioned relative to each other by the connector. The circuit board is disposed within the receiving cavity. This application aims to reduce the stress exerted on the circuit board by the connector.

Description

Technical Field

[0001] This application relates to the field of controller technology, and more particularly to a controller, an airbag system, and a vehicle. Background Technology

[0002] In related technologies, the controller includes a housing and a circuit board. The housing includes a first housing, a second housing, and a connector. The first housing and the second housing are connected together by the connector. The first housing and the second housing together define a receiving cavity. The circuit board is disposed in the receiving cavity. The connector also passes through the circuit board, which causes the connector to exert greater stress on the circuit board. Summary of the Invention

[0003] This application provides a controller designed to reduce the stress exerted on a circuit board by connectors.

[0004] To achieve the above objectives, according to a first aspect of this application, a controller is provided, comprising: The housing includes a first housing, a second housing, and a connector, wherein the first housing and the second housing are connected and together define a receiving cavity, the connector is located outside the receiving cavity, and the first housing and the second housing are positioned by the connector; and The circuit board is located inside the receiving cavity.

[0005] Optionally, the connector has a snap-fit ​​element, and the second housing has a snap-fit ​​hole, the snap-fit ​​element engaging with the snap-fit ​​hole; And / or, the connector is integrally formed with the first housing; And / or, the circuit board is connected to the first housing and is spaced apart from the second housing; And / or, the circuit board is provided with a connection hole, and the housing further includes a connecting post, the connecting post being disposed in the receiving cavity, one end of the connecting post being connected to the first housing, and the other end passing through the connection hole to be connected to the circuit board.

[0006] Optionally, the housing further includes a sealing ring disposed between the first housing and the second housing.

[0007] Optionally, the sealing ring is integrally formed with the first housing; And / or, the sealing ring is spaced apart from the circuit board.

[0008] Optionally, the second housing has a water-retaining ring protrusion on one side facing the first housing, the first housing covers the water-retaining ring protrusion, and the sealing ring is disposed between the outer peripheral side of the water-retaining ring protrusion and the inner peripheral side of the first housing.

[0009] Optionally, the controller further includes a capacitor electrically connected to the circuit board, wherein the length direction of the capacitor is parallel to the circuit board and intersects the height direction of the housing.

[0010] Optionally, the controller further includes a patch holder, the capacitor is disposed on the patch holder, and the patch holder is attached to the circuit board.

[0011] Optionally, the controller further includes a connector, the first housing having a mounting hole communicating with the receiving cavity, the connector being disposed in the mounting hole and connected to the circuit board.

[0012] Optionally, in the height direction of the outer casing, the first casing and the second casing are arranged opposite to each other, and the mounting hole is opened on the side of the first casing away from the second casing.

[0013] Optionally, the controller further includes a water-blocking cover disposed on the first housing, the water-blocking cover covering the mounting hole.

[0014] According to a second aspect of this application, an airbag system is provided, comprising: airbags; and The aforementioned controller is used to control the inflation of the airbag.

[0015] According to a third aspect of this application, a vehicle is provided, including the aforementioned airbag system.

[0016] In the controller of this application embodiment, the connector is located outside the receiving cavity and does not contact the circuit board at all. This physically cuts off the stress transmission path, completely avoiding problems such as circuit breakage and component damage caused by stress on the circuit board, and greatly improving the working reliability and service life of the circuit board.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0019] Figure 1This is an exploded view of the controller provided in an exemplary embodiment of this disclosure; Figure 2 This is a cross-sectional view of the controller provided in an exemplary embodiment of this disclosure; Figure 3 yes Figure 1 A partial structural diagram of the controller; Figure 4 yes Figure 1 A schematic diagram of the structure of the second housing of the controller; Figure 5 yes Figure 1 A schematic diagram of the structure of the capacitor and the surface mount support.

[0020] Explanation of reference numerals in the attached figures: 100. Controller; 200. Housing; 210. First housing; 211. Mounting hole; 212. Drainage groove; 220. Connector; 221. Connecting seat; 222. Pressing post; 223. Buckle; 224. Deformation groove; 230. Sealing ring; 240. Second housing; 241. Water-retaining ring protrusion; 242. Guide boss; 243. Positioning groove; 244. Buckle hole; 250. Connecting post; 260. First positioning post; 270. Receiving cavity; 300. Circuit board ; 310, First positioning hole; 320, Second positioning hole; 330, Second through hole; 410, Press-fit terminal; 420, Connector; 430, Water baffle; 431, Cover body; 432, Through conduit; 500, Capacitor; 510, Pin; 600, SMD bracket; 610, Bracket body; 611, First through hole; 620, SMD terminal; 630, Head limiting structure; 640, Tail limiting structure; 650, Limiting rib; 660, Second positioning post. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] Reference Figure 1 The controller 100 has many applications. It can be used in household appliances, such as refrigerators or air conditioners, and also in transportation vehicles, such as vehicles or airplanes.

[0023] When the controller 100 is applied in a vehicle, the controller 100 may be, but is not limited to, a vehicle airbag controller 100, an engine controller 100, or an anti-lock braking system controller 100.

[0024] For ease of explanation, this disclosure refers to controller 100 as airbag controller 100. It is understood that a vehicle includes an airbag system, which includes an airbag and controller 100, and controller 100 is used to control the inflation of the airbag.

[0025] Reference Figures 1 to 3 This disclosure provides a controller 100. The controller 100 includes a housing 200 and a circuit board 300. The housing 200 includes a first housing 210, a second housing 240, and a connector 220. The first housing 210 and the second housing 240 are connected and together define a receiving cavity 270. The connector 220 is located outside the receiving cavity 270, and the first housing 210 and the second housing 240 are limited by the connector 220. The circuit board 300 is disposed within the receiving cavity 270.

[0026] In related technologies, connectors 220 (such as screws or bolts) need to pass through circuit boards 300 to connect the first housing 210 and the second housing 240. This will generate continuous squeezing and pulling stress on the perforation location of circuit boards 300 (for example, the tightening force during housing assembly and the micro-deformation of the housing caused by changes in ambient temperature and humidity in the later stage will transmit stress to circuit boards 300).

[0027] In this solution, the connector 220 is located outside the receiving cavity 270 and does not contact the circuit board 300 at all. This physically cuts off the stress transmission path and completely avoids problems such as circuit breakage and component damage caused by stress on the circuit board 300, thus greatly improving the working reliability and service life of the circuit board 300.

[0028] In related technologies, during assembly, the through holes of the circuit board 300 and the holes of the housing must be aligned first, and then the connector 220 is inserted. This requires high hole precision and the assembly steps are cumbersome.

[0029] In this solution, the circuit board 300 only needs to be placed directly into the receiving cavity 270 (without needing to align the through holes of the connector 220), and then the first housing 210 and the second housing 240 are connected through the connector 220 outside the receiving cavity 270. The steps are simpler, the assembly difficulty is reduced, and the production efficiency is improved.

[0030] In related technologies, circuit board 300 needs to reserve through holes for connector 220, which will occupy the space for components and circuit layout on the board.

[0031] This solution eliminates the need for pre-drilled holes and reinforced structures for holes. The structure of the circuit board 300 is more flexible and can be optimized according to the circuit's functional requirements, rather than being limited by the position of the connector 220.

[0032] Reference Figure 3 and Figure 4In some embodiments, the connector 220 has a snap fastener, and the second housing 240 is provided with a snap hole 244, which engages with the snap fastener.

[0033] The snap-fit ​​connection feature eliminates the need for tools (such as screwdrivers) required by traditional screws and other connectors, making the assembly process more efficient.

[0034] It lowers the skill threshold for assembly, eliminating the need for workers to master the tightening force of screws (avoiding loose connections due to excessive looseness and deformed housings due to excessive tightness). The fastening operation is simple and intuitive, which can reduce the skill requirements for assembly personnel and reduce the production defect rate caused by improper operation (such as housing scratches and assembly misalignment).

[0035] However, this design is not limited to this. In some other embodiments, the connector 220 has a plug-in, the second housing is provided with a slot, the plug-in is inserted into the slot, and the depth direction of the slot is consistent with the length direction or width direction of the housing 200.

[0036] In some embodiments, the connector 220 is integrally formed with the first housing 210. This eliminates the need for separate production of the connector 220 and the step of assembling it into the first housing 210; the processing of the first housing 210 and the connector 220 is completed directly through an integral molding process, significantly shortening the production cycle and making it particularly suitable for large-scale mass production. It also reduces the material procurement, warehousing, and quality inspection steps associated with separate connectors 220, indirectly lowering the overall manufacturing cost.

[0037] In some embodiments, the connector 220 includes a connecting seat 221, a pressing post 222, and a fastening part 223. The connecting seat 221 is disposed on the periphery of the first housing 210 and has a guide hole extending along the height direction of the housing 200. The pressing post 222 is disposed in the guide hole and connected to the connecting seat 221. The fastening part 223 is connected to the pressing post 222 and is used to fasten with the second housing 240.

[0038] During the process of connecting the first housing 210 and the second housing 240 by the connector 220, the pressing post 222 can be pressed to make the pressing post 222 slide relative to the connecting seat 221. During the relative sliding of the pressing post 222 and the connecting seat 221, the connection between the pressing post 222 and the connecting seat 221 is broken, so that the pressing post 222 slides on the guide post, thereby allowing the buckle 223 to extend into the second housing 240, so that the buckle 223 is fastened to the second housing 240.

[0039] The second housing 240 is provided with a buckle hole 244. The outer diameter of the buckle part 223 is larger than the outer diameter of the pressing post 222. A deformation groove 224 is provided on the end side of the buckle part 223. The second housing 240 is provided with a buckle hole 244. When the buckle part 223 is inserted into the buckle hole 244, it compresses the deformation groove 224. When the pressing post 222 is inserted into the buckle hole 244, the deformation groove 224 is restored, thereby making the buckle part 223 engage with the buckle hole 244.

[0040] It is understood that there are many directions for the guide hole. In some other embodiments, the guide hole extends along the length or width of the housing 200.

[0041] In some embodiments, the circuit board 300 is connected to the first housing 210 and spaced apart from the second housing 240. This ensures that after the connector 220 connects the first housing 210 and the second housing 240, the first housing 210 and the second housing 240 do not exert compressive force on the circuit board 300, resulting in lower stress on the circuit board 300.

[0042] In some embodiments, the circuit board 300 is provided with a connection hole, and the housing 200 further includes a connecting post 250. The connecting post 250 is disposed in the receiving cavity 270. One end of the connecting post 250 is connected to the first housing 210, and the other end passes through the connection hole to be connected to the circuit board 300.

[0043] Thus, the circuit board 300 is securely connected to the first housing 210 via the connecting post 250, thereby ensuring a more stable position of the circuit board 300 within the receiving cavity 270. In one example, the connecting post 250 is configured as a heat-riveted post, and the connecting post 250 is riveted to the circuit board 300. However, this design is not limited to this; in some other embodiments, the circuit board 300 is bonded to the first housing 210.

[0044] In some embodiments, the circuit board 300 is provided with a first positioning hole 310, and the housing 200 further includes a first positioning post 260, which is received in the receiving cavity 270. One end of the first positioning post 260 is connected to the first housing 210, and the first positioning post 260 passes through the first positioning hole 310. Thus, after the first positioning hole 310 and the first positioning post 260 are engaged, the connecting post 250 can be aligned with the connecting hole to facilitate thermal riveting of the connecting post 250 to the circuit board 300.

[0045] In some embodiments, the first housing 210 is configured to be made of metal or plastic. Metal provides higher structural strength to the first housing 210, which helps protect the circuit board 300. Plastic reduces manufacturing costs, thus lowering the cost of the controller 100. Metal, on the other hand, allows the first housing 210 to receive collision signals transmitted from the vehicle body more accurately, improving the ignition accuracy of the controller 100.

[0046] In some embodiments, the second housing 240 is configured to be made of metal or plastic. Metal provides higher structural strength to the second housing 240, which helps protect the circuit board 300. Plastic reduces manufacturing costs, thus lowering the cost of the controller 100. Metal, on the other hand, allows the second housing 240 to receive collision signals transmitted from the vehicle body more accurately, improving the ignition accuracy of the controller 100.

[0047] In some embodiments, the housing 200 further includes a sealing ring 230 disposed between the first housing 210 and the second housing 240. The sealed cavity improves the sealing performance of the receiving cavity 270, reduces the ingress of liquid from the gap between the first housing 210 and the second housing 240, thereby reducing the occurrence of short circuits in the circuit board 300 and improving the safety of the controller 100. Furthermore, the high sealing performance of the receiving cavity 270 also helps to reduce the impact of high-frequency vibrations from other vibration sources, such as, but not limited to, air conditioners and refrigerator ducts, on the circuit board 300. In some embodiments, the sealing ring 230 is integrally formed with the first housing 210. This eliminates the need for separate procurement of the sealing ring 230 and for its storage. Furthermore, it reduces the difficulty of installing the sealing cavity between the first housing 210 and the second housing 240, thereby improving the production efficiency of the controller 100.

[0048] In some embodiments, the sealing ring 230 is spaced apart from the circuit board 300. Thus, the sealing ring 230 does not directly absorb the acceleration signal sensed by the circuit board 300, resulting in lower distortion of the acceleration signal sensed by the circuit board 300.

[0049] In some embodiments, the second housing 240 has a water-retaining ring protrusion 241 protruding on the side facing the first housing 210, and the first housing 210 covers the water-retaining ring protrusion 241. A sealing ring 230 is disposed between the outer peripheral side of the water-retaining ring protrusion 241 and the inner peripheral side of the first housing 210. This helps to extend the path of liquid into the receiving cavity 270. In addition, the liquid needs to have a high level to pass over the water-retaining ring protrusion 241 to enter the receiving cavity 270, which makes the outer casing 200 highly waterproof and helps to reduce the occurrence of short circuits in the circuit board 300.

[0050] In some embodiments, the first housing 210 is provided with a guide boss 242, which is spaced from the water-retaining ring boss 241 to form a positioning groove 243. The periphery of the first housing 210 is inserted into the positioning groove 243, and the width of the positioning groove 243 tends to decrease in the direction in which the periphery of the first housing 210 is inserted. Thus, guided by the positioning groove 243, the periphery of the second housing 240 can be easily inserted into the positioning groove 243, thereby improving the assembly efficiency of the first housing 210 and the second housing 240.

[0051] In some embodiments, the guide boss 242 has a snap-fit ​​hole 244, and the connector 220 is snapped into the snap-fit ​​hole 244. Thus, the guide boss 242 not only serves as a component that restricts the positioning groove 243, but also serves as a component for the male connector 220 to snap into, which makes the guide boss 242 more versatile in function.

[0052] Reference Figure 5 In some embodiments, the controller 100 further includes a capacitor 500 electrically connected to the circuit board 300. The length direction of the capacitor 500 is parallel to the circuit board 300 and intersects the height direction of the housing 200. This helps to reduce the height of the housing 200. Notably, in one example, the length direction of the capacitor 500 is perpendicular to the height direction of the housing 200.

[0053] In some embodiments, the controller 100 further includes a surface mount bracket 600, on which the capacitor 500 is disposed, and the surface mount bracket 600 is attached to the circuit board 300. Thus, the surface mount bracket 600 is compatible with SMT (Surface Mount Technology) surface mount technology: the surface mount bracket 600, along with resistors, chips, and other surface mount components, can be automatically mounted onto the circuit board 300 using SMT equipment, eliminating the need for separate manual installation of the capacitor 500 and significantly improving production efficiency.

[0054] In some embodiments, the controller 100 further includes a connector 420. The first housing 210 has a mounting hole 211 that communicates with the receiving cavity 270. The connector 420 is disposed in the mounting hole 211 and connected to the circuit board 300. Thus, the first housing 210 not only serves as a component that limits the receiving cavity 270, but also serves as a component for assembling the connector 420. This makes the first housing 210 more functional and its integration higher.

[0055] In some embodiments, the first housing 210 and the second housing 240 are arranged opposite each other in the height direction of the housing 200, and the mounting hole 211 is formed on the side of the first housing 210 away from the second housing 240. Thus, in the height direction of the housing 200, the opening of the mounting hole 211 is located on the side of the first housing 210 away from the second housing 240, which helps to reduce the occurrence of liquid splashing from the periphery of the housing 200 into the mounting hole 211.

[0056] In some embodiments, the controller 100 further includes a water baffle 430 disposed on the first housing 210, which blocks the mounting hole 211. Thus, the water baffle 430 helps to reduce the occurrence of liquid splashing into the mounting hole 211.

[0057] To facilitate understanding of this disclosure, the entirety of this disclosure is described herein.

[0058] The controller 100 includes a first housing 210, a second housing 240, a circuit board 300, a connector 220, a press-fit terminal 410, a surface mount bracket 600, a capacitor 500, a connector 420, wires, a water baffle 430, and a sealing ring 230. The connector 220 is configured as a snap-fit ​​component, the capacitor 500 is configured as a horizontal capacitor, the first housing 210 and the sealing ring 230 are integrally molded, the first housing 210 and the connector 220 are integrally formed, the first housing 210 is configured as the upper housing, and the second housing 240 is configured as the base plate. The first housing 210 and the second housing 240 are positioned opposite each other along the height direction of the outer casing 200. The controller 100 is assembled by assembling the capacitor 500 into the surface mount bracket 600 to form a capacitor bracket assembly. The capacitor bracket assembly and other components are then SMT reflow soldered onto the circuit board 300. The press-fit terminal 410 is then press-fitted onto the circuit board 300 to form the circuit board 300 assembly. The circuit board 300 assembly is then pressed into the first housing 210 of the controller 100. Finally, the first housing 210 and the second housing 240 are connected together by the connector 220.

[0059] The connector 420 can be inserted into the mounting hole 211 along the height direction of the housing 200, and the wire is connected to the connector 420. The water baffle 430 includes a cover body 431 and a cable guide tube 432. The cable guide tube 432 communicates with the cover body 431. The cover body 431 is installed on the first housing 210 so that the cover body 431 covers the mounting hole 211, and the wire passes through the cable guide tube 432. When the water pipe is made of soft rubber, the cable guide tube 432 is wrapped around the wire with a cable tie, thereby reducing the amount of liquid entering the mounting hole 211 along the wire, thereby reducing the occurrence of short circuits in the controller 100. The periphery of the cover body 431 is snapped into the first housing 210 to form a complete protective seal around the mounting hole 211.

[0060] The controller 100 eliminates screw fastening. The first housing 210 and the connector 220 are integrally formed. The connector 220 is configured as a snap-fit ​​component, which includes a connecting seat 221, a pressing post 222, and a fastening part 223. The connecting seat 221 is located on the periphery of the first housing 210 and has a guide hole extending along the height direction of the outer shell 200. The pressing post 222 is located in the guide hole and connected to the connecting seat 221. The fastening part 223 is connected to the pressing post. The fastener 223 is used to engage with the fastening hole 244 of the second housing 240. The outer diameter of the fastener 223 is larger than the outer diameter of the pressing post 222. A deformation groove 224 is provided on the end side of the fastener 223. The second housing 240 is provided with the fastening hole 244. When the fastener 223 is inserted into the fastening hole 244, it compresses the deformation groove 224. When the pressing post 222 is inserted into the fastening hole 244, the deformation groove 224 recovers, thereby making the fastener 223 engage with the fastening hole 244. This installation method of the first housing 210 and the second housing 240 is simple, reduces screw material, and avoids the risk of water seepage from screw holes and screw fastening stress. The opening of the mounting hole 211 is changed from the conventional side to an upward orientation, reducing the occurrence of water entering from the side of the housing 200. The soft rubber water-blocking cover 430 protects the upward-facing opening of the mounting hole 211.

[0061] The first housing 210 has four limiting connecting posts 250 that use a hot riveting process to fasten the circuit board 300 instead of screws; the outer periphery of the first housing 210 is connected to four connectors 220 for fastening with the second housing 240.

[0062] The sealing ring 230 is integrally injection molded with the first housing 210 using a secondary injection molding process. In the height direction of the outer shell 200, the second housing 240 is provided with a water-retaining ring protrusion 241 on the side close to the first housing 210. The sealing ring 230 and the outer periphery of the water-retaining ring protrusion 241 form a full-circle interference seal, which improves the waterproof performance of the receiving cavity 270 and reduces the risk of water entering the receiving cavity 270.

[0063] The water-retaining ring protrusion 241 forms a closed-loop protection for the circuit board 300 inside the controller 100. The second housing 240 is also provided with four guide protrusions 242, each with a snap-fit ​​hole 244. The connector 220 is snapped into the snap-fit ​​hole 244. The four guide protrusions 242 are arranged around the water-retaining ring protrusion 241. The guide boss 242, located near the water-blocking ring protrusion 241, restricts the first housing 210 between the guide boss 242 and the water-blocking ring protrusion 241, thus guiding and limiting the first housing 210. This reduces the gap between the second housing 240 and the first housing 210 during assembly, restricts the shaking of the second housing 240, and reduces the risk of collision between the second housing 240 and components on the circuit board 300.

[0064] The surface mount bracket 600 includes a bracket body 610 and surface mount terminals 620 disposed on the bracket body 610. The bracket body 610 clamps and fixes the capacitor 500. The surface mount terminals 620 can connect the capacitor bracket assembly together with other components to the circuit board 300 via SMT. The bracket body 610 is interference-fitted with the capacitor 500, and the bracket body 610 clamps the periphery of the capacitor 500 to restrict the movement of the capacitor 500 along the height direction of the housing 200. In the length direction of the capacitor 500, the bracket body 610 has a tail limiting structure 640 and a head limiting structure 630, and a middle limiting rib 650 to restrict the movement of the capacitor 500 along the length direction of the capacitor 500. The surface mount bracket 600 also includes two second positioning posts 660 disposed on the bracket body 610, and the second positioning posts 660 are positioned and fixed to... The circuit board 300 has a second positioning hole 320. The capacitor 500 has two bent leads 510. The support body 610 has two first through holes 611 through which the two leads 510 pass. The circuit board 300 has a second through hole 330 through which the leads 510 also pass. The capacitor support assembly is soldered onto the circuit board 300 during the reflow soldering process. This capacitor fixing method can expand the lateral space inside the controller 100 and reduce the height space. It can also be reflow soldered together with other components via SMT, making the process simple.

[0065] In some other examples, the splash guard 430 is made of hard plastic and is slidably or rotatably connected to the first cover 431 to facilitate assembly of the splash guard 430 and the first housing 210. The first housing 210 and the second housing 240 are fastened together by a guide groove side insertion method.

[0066] In related technologies, the plastic first housing 210 and the metal second housing 240 are fastened together with screws. The gap between the mating surfaces of the first housing 210 and the second housing 240 and the screw holes become potential channels for water seepage. Moreover, the assembly process involves additional fastening, and the stress risk to the circuit board 300 caused by the fastening torque needs to be controlled. Alternatively, the plastic first housing 210 and the metal second housing 240 are fastened together with screws, with a separate sealing bushing added in between. This solution also suffers from problems such as water seepage through the screw holes, complex fastening, and stress risks. Furthermore, the assembly process of adding a separate sealing bushing is complex. Alternatively, both the first housing 210 and the second housing 240 are made of plastic parts, which are laser welded or hot riveted together. This solution has high process control standards and high process costs. Moreover, the plastic second housing 240 has lower accuracy in receiving collision signals transmitted by the vehicle body compared to the metal second housing 240, which can easily cause deviations in the ignition accuracy of the airbag controller 100. Alternatively, the first housing 210 is embedded with a nut and fastened together with screws. This method increases the nut pressing process and nut costs.

[0067] This disclosure eliminates screw fastening and uses a snap fastener to fasten the first housing 210 to the second housing 240, so that the first housing 210 and the second housing 240 are fastened together by the snap fastener. Moreover, the snap fastener does not pose a risk of water leakage or stress to the devices on the internal circuit board 300 from the outside of the structure of the first housing 210.

[0068] A sealing ring 230 is secondary-injected onto the inner contour surface of the first housing 210 of this disclosure. The sealing ring 230 forms a complete seal between the inner contour surface of the first housing 210 and the outer contour surface of the water-retaining ring protrusion 241 of the second housing 240, resulting in significant waterproofing and a simple assembly process. The sealing ring 230 is fixed between the first housing 210 and the second housing 240 and does not directly contact the circuit board 300 to absorb acceleration information, thus reducing the distortion of the acceleration signal sensed by the circuit board 300. The sealing ring 230 also improves the sealing performance of the controller 100, reducing the impact of high-frequency vibrations from surrounding air conditioners, refrigerator ducts, and other vibration sources.

[0069] One proposed solution for fixing the capacitor 500 is to fix it with adhesive after wave soldering. This solution requires high soldering temperature and cannot use a large-capacity capacitor with increased length due to the limited assembly height. Alternatively, the capacitor bracket can be integrated into the first housing 210, with the capacitor 500 fixed to the first housing 210. A press-fit terminal 410 is used to press one end of the capacitor pin 510 and the other end is pressed into the circuit board 300. This method is performed during assembly, and it is difficult to check the pressing effect after assembly. The positional accuracy of the press-fit terminal 410 is required when pressing the circuit board 300 into the press-fit terminal 410. Another method is to use a capacitor bracket with a press-fit terminal 410 to fix the capacitor 500 to the circuit board 300. This method requires multiple vias and has poor vibration and shock resistance. A third method is to open bolt holes in the base of the fixing bracket and fasten it to the circuit board 300 with bolts. This method generates large strain on the circuit board 300 during bolt tightening, posing a risk of bending strain to the surrounding components and pins 510.

[0070] The capacitor 500 fixing scheme disclosed herein uses a surface mount bracket 600 capable of SMT reflow soldering to hold the capacitor 500. The surface mount bracket 600 has plastic-coated surface mount terminals 620. The capacitor bracket assembly, together with other components, is surface mount onto the circuit board 300 via SMT reflow soldering. This method achieves a high degree of automation in surface mount assembly, eliminating the need for capacitor wave soldering. At the same time, the surface mount bracket 600 is compatible with capacitor structures of different lengths and capacitances, meeting diverse hardware requirements. It also makes full use of the lateral space within the first housing 210, reducing the height of the outer housing 200. The surface mount terminals 620 are embedded in the bracket body 610, enabling SMT reflow soldering and eliminating the need for capacitor wave soldering. The bracket body 610 has a first via 611 that improves the positional accuracy of the capacitor bending leads 510 and guides and positions them on the circuit board 300 via a second via 330, achieving a highly efficient automated surface mount process.

[0071] The connector 420 in the related technology is a non-waterproof connector 420, and a separate mounting base is designed for the connector 420. The mounting base has a mounting hole 211, and the opening of the mounting hole 211 faces the side of the outer shell 200. The opening is waterproofed by a waterproof membrane, which can only provide limited protection against condensation dripping from above, and cannot protect against water seeping into the mounting hole 211 from the side. Alternatively, if a waterproof connector 420 is used, a separate sealing bushing is added to the connector 420. This solution is costly and the assembly process of the bushing is complicated.

[0072] This disclosure eliminates the mounting base and integrates the mounting hole 211 into the first housing 210. The opening of the mounting hole 211 faces upward, preventing water from entering from the side of the product. The protruding ribs at the edge of the opening form a water baffle, while the water baffle cover 430 covers the opening. At the same time, the first housing 210 is provided with a sloping surface and a drainage groove 212 to accelerate the drainage speed, improve the waterproof effect of the product, reduce the risk of water ingress, and facilitate installation.

[0073] It is worth mentioning that the length, width, and height of the outer casing 200 are respectively as follows: Figure 1 The x, y, and z directions are shown in the diagram.

[0074] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0075] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0076] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0077] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A controller, characterized in that, include: The outer casing includes a first housing, a second housing, and a connector. The first housing and the second housing are connected and together define a receiving cavity. The connector is located outside the receiving cavity, and the first housing and the second housing are limited by the connector. as well as The circuit board is located inside the receiving cavity.

2. The controller according to claim 1, characterized in that, The connector has a fastening element, and the second housing is provided with a fastening hole, the fastening element engaging with the fastening hole; And / or, the connector is integrally formed with the first housing; And / or, the circuit board is connected to the first housing and is spaced apart from the second housing; And / or, the circuit board is provided with a connection hole, and the housing further includes a connecting post, the connecting post being disposed in the receiving cavity, one end of the connecting post being connected to the first housing, and the other end passing through the connection hole to be connected to the circuit board.

3. The controller according to claim 1, characterized in that, The outer casing also includes a sealing ring, which is disposed between the first casing and the second casing.

4. The controller according to claim 3, characterized in that, The sealing ring is integrally formed with the first housing. And / or, the sealing ring is spaced apart from the circuit board; And / or, the second housing has a water-blocking ring protrusion on the side facing the first housing, the first housing covers the water-blocking ring protrusion, and the sealing ring is disposed between the outer peripheral side of the water-blocking ring protrusion and the inner peripheral side of the first housing.

5. The controller according to claim 1, characterized in that, The controller also includes a capacitor electrically connected to the circuit board. The length direction of the capacitor is parallel to that of the circuit board and intersects with the height direction of the housing.

6. The controller according to claim 5, characterized in that, The controller also includes a surface mount bracket, the capacitor is disposed on the surface mount bracket, and the surface mount bracket is attached to the circuit board.

7. The controller according to any one of claims 1 to 6, characterized in that, The controller further includes a connector. The first housing has a mounting hole that communicates with the receiving cavity. The connector is located in the mounting hole and connected to the circuit board.

8. The controller according to claim 7, characterized in that, In the height direction of the outer casing, the first casing and the second casing are arranged opposite to each other, and the mounting hole is opened on the side of the first casing away from the second casing; And / or, the controller further includes a water-blocking cover disposed on the first housing, the water-blocking cover covering the mounting hole.

9. An airbag system, characterized in that, include: airbags; as well as A controller for controlling the inflation of the airbag.

10. A vehicle, characterized in that, Includes the airbag system as described in claim 9.

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