Vehicle-mounted multipurpose controller

Abstract

This invention provides a vehicle-mounted multi-purpose controller, comprising: a housing having a grip portion suitable for one-handed use and a control portion located in front of the grip portion; a button assembly disposed on the control portion, wherein the user's fingers are within the touch range of the button assembly when holding the grip portion with one hand; and a control circuit board fixed inside the housing and electrically connected to the button assembly, on which a microcontroller is integrated for executing button signals conforming to a preset safe operation sequence and filtering out non-conforming signals. This invention achieves ambidextrous one-handed blind operation through an ergonomic housing design, while the preset safe operation sequence verification mechanism built into the microcontroller eliminates the risk of malfunctions caused by accidental touches or bumps from the logical source, significantly improving the operational flexibility and safety of the vehicle-mounted device controller.

Description

Technical Field

[0001] This invention relates to the field of vehicle-mounted equipment controller technology, and in particular provides a vehicle-mounted multi-purpose controller. Background Technology

[0002] In the fields of logistics and transportation, accessible transportation, sanitation operations, and special vehicle operations, the use of equipment such as vehicle-mounted lifting tailgates, wheelchair lifting platforms, and lifting seats is becoming increasingly widespread. These devices are typically driven by DC motors and require operators to issue commands for raising, lowering, extending, and retracting via handheld controllers. Due to the high frequency of operation, complex working environments, and extremely stringent safety requirements, the operability and safety of the controller are of paramount importance.

[0003] Currently, common vehicle-mounted equipment controllers on the market suffer from two prominent problems in terms of operation methods and safety mechanisms: First, the operation method is unfriendly to users, making one-handed operation impossible. Most existing controllers are rectangular box-shaped structures, large in size and inconvenient to hold. Operation requires one hand to support the controller and the other to press buttons, occupying both hands simultaneously. When operators are holding goods, assisting people with mobility issues, or climbing vehicles, their hands cannot coordinate, the controller lacks stable support, and operation becomes difficult, severely impacting work efficiency and even leading to safety accidents due to distraction. Second, the controllers lack anti-misoperation mechanisms; button signals are directly driven by unverified button presses, posing serious safety hazards. Traditional controller buttons are directly connected to the control circuit; pressing any function key triggers the motor. In actual use, operators often accidentally press buttons or press the wrong button sequence in a panic, causing the equipment to malfunction against the operator's intention. For example, accidentally triggering the equipment to descend without proper safety preparation could result in serious consequences such as goods falling, injuring people, or even vehicle overturning. Summary of the Invention

[0004] The purpose of this invention is to provide a vehicle-mounted multi-purpose controller, which aims to solve the problems of existing vehicle-mounted device controllers being unable to achieve flexible one-handed operation and lacking anti-misoperation mechanisms.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The vehicle-mounted multi-purpose controller provided in this application includes: The housing has a grip portion suitable for one-handed holding and a control portion located in front of the grip portion; The button assembly is located on the control unit, and when the user holds the control unit with one hand, the user's operating fingers are within the touch range of the button assembly; The control circuit board is fixed inside the housing and electrically connected to the button assembly. The control circuit board integrates a microcontroller, which is used to execute the received button signals that conform to the preset safety operation sequence and filter out button signals that do not conform to the preset safety operation sequence.

[0006] As a further improvement to this application, the button assembly includes a switch and a button silicone component; The switch is mounted on the control circuit board and is electrically connected to the control circuit board. The top of the control unit is provided with a mounting area, and the mounting area has a first through hole through which the switch passes; The silicone button component is installed in the mounting area. The silicone button component has a button protrusion, and the bottom of the button protrusion abuts against the switch passing through the first through hole.

[0007] As a further improvement to this application, the control circuit board is also equipped with indicator lights, each corresponding to a switch; The button assembly also includes a light-transmitting lens, which is ring-shaped and installed in the mounting area. The button protrusion of the button silicone part is engaged within the ring of the light-transmitting lens. The mounting area has a second through hole, and the button silicone part has a third through hole corresponding to the position of the second through hole. The light emitted by the indicator light passes through the second through hole and the third through hole in sequence, and then is transmitted to the outside through the light-transmitting lens.

[0008] As a further improvement of this application, the housing includes a front shell and a bottom shell, and the housing is provided with an impact-resistant silicone assembly, which includes: The first shock-resistant silicone part is located at the bottom of the control section of the bottom shell and protrudes outward from the shell. The protruding part constitutes the mounting mechanism. The second shock-resistant silicone part is located at the junction of the bottom shell and the front shell at the control section.

[0009] As a further improvement of this application, the gripping part of the bottom shell is provided with a magnetic mounting groove, and a strong magnet is disposed in the magnetic mounting groove. A top block is provided in the top shell at a position corresponding to the magnetic mounting groove. The top block is used to press the strong magnet tightly when the top shell and the bottom shell are fastened together. A buffer sponge is provided between the strong magnet and the top block.

[0010] As a further improvement of this application, a light guide and a light strip are also provided at the rear of the housing. The light strip is electrically connected to the control circuit board, and the light guide is embedded in the light guide mounting groove on the side of the housing and covers the light strip.

[0011] As a further improvement of this application, the control circuit board also integrates a power supply circuit, which includes a first step-down unit, a second step-down unit, and a linear regulator unit. The input terminal of the first step-down unit is connected to the vehicle DC input voltage, and the output terminal of the first step-down unit outputs the first voltage. The first step-down unit is an asynchronous step-down DC-DC converter. The input terminal of the second buck unit is connected to the output terminal of the first buck unit, and the output terminal of the second buck unit outputs a second voltage. The second buck unit is a synchronous buck DC-DC converter. The input of the linear regulator unit is connected to the output of the second buck unit. The output of the linear regulator unit outputs a third voltage and is connected to the power supply pin of the microcontroller.

[0012] As a further improvement of this application, the first step-down unit includes a first step-down chip, a Zener diode, a first voltage divider resistor, a second voltage divider resistor, a power inductor, a freewheeling diode, a first feedback resistor, and a second feedback resistor. One end of the first voltage divider resistor is connected to the vehicle DC input voltage. The other end of the first voltage divider resistor is connected to one end of the second voltage divider resistor and the cathode of the Zener diode. The other end of the second voltage divider resistor is grounded, and the anode of the Zener diode is grounded. The common terminal of the first voltage divider resistor and the second voltage divider resistor is connected to the enable pin of the first buck chip. One end of the power inductor is connected to the switching pin of the first step-down chip, and the other end of the power inductor outputs the first voltage; The negative terminal of the freewheeling diode is connected to the common terminal of the power inductor and the first voltage output terminal, while the positive terminal of the freewheeling diode is grounded. One end of the first feedback resistor is connected to the first voltage output terminal, the other end of the first feedback resistor is connected to one end of the second feedback resistor, the other end of the second feedback resistor is grounded, and the common terminal of the first feedback resistor and the second feedback resistor is connected to the feedback pin of the first step-down chip. The second buck unit includes a second buck chip, a bootstrap capacitor, a third feedback resistor, a fourth feedback resistor, and a second power inductor. The bootstrap capacitor is connected between the bootstrap pin and the switching node of the second buck chip; One end of the second power inductor is connected to the switching node of the second step-down chip, and the other end of the second power inductor outputs the second voltage; One end of the third feedback resistor is connected to the second voltage output terminal, the other end of the third feedback resistor is connected to one end of the fourth feedback resistor, the other end of the fourth feedback resistor is grounded, and the common terminal of the third and fourth feedback resistors is connected to the feedback pin of the second step-down chip.

[0013] As a further improvement of this application, the control circuit board also integrates a motor drive unit, which includes a transistor, a power MOSFET, a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, and a second diode. The two ends of the first resistor are connected to the output pin of the microcontroller and the base of the transistor, respectively. One end of the second resistor is connected to the base of the transistor, and the other end is grounded; The emitter of the transistor is grounded, and the collector of the transistor is connected to the gate of the power MOSFET. The drain of the power MOSFET is connected to the power supply, and the source of the power MOSFET is used to connect to an external high-power motor.

[0014] The collector of the transistor is connected to the gate of the power MOSFET via a third resistor; One end of the fourth resistor is connected to the gate of the power MOSFET, and the other end is connected to the power supply. One end of the first diode is connected to the source of the power MOSFET, and the other end is grounded; One end of the second diode is connected to the source of the power MOSFET, and the other end is grounded.

[0015] As a further improvement of this application, the control circuit board also integrates an input protection circuit, which includes a first bidirectional ESD protection diode, a second bidirectional ESD protection diode, a resettable fuse, a first capacitor, and a second capacitor. A resettable fuse is connected in series in the positive line of the power input terminal; One end of the first bidirectional ESD protection diode is connected to the output terminal of the self-resetting fuse, and the other end is grounded; One end of the second bidirectional ESD protection diode is connected to the output terminal of the resettable fuse, and the other end is grounded; The first capacitor is an electrolytic capacitor, with one end connected to the output terminal of the resettable fuse and the other end grounded. The second capacitor is a ceramic capacitor, with one end connected to the output terminal of the resettable fuse and the other end grounded.

[0016] As a further improvement of this application, a drive board is also fixed inside the housing. The drive board is electrically connected to the control circuit board, and multiple power MOSFETs are integrated on the drive board.

[0017] The beneficial effects of this invention are as follows: The vehicle-mounted multi-purpose controller provided in this application divides the housing into a grip section and a control section, and optimizes its shape according to ergonomics, allowing the operator to hold it securely with one hand regardless of whether they are left- or right-handed. The index and middle fingers naturally fall within the touch area of ​​the button components, truly achieving ambidextrous one-handed blind operation. This completely frees the operator's other hand for other tasks, significantly improving operational flexibility and work efficiency. More importantly, the microcontroller integrated on the control circuit board has a built-in preset safe operation sequence verification mechanism. It only executes legal key commands input in a specific order and combination, filtering out all illegal signals generated by accidental touches, mishaps, or chaotic pressing. This eliminates the possibility of equipment malfunction from the source of the control logic, ensuring the personal safety of the operator and the safe operation of the equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the vehicle-mounted multi-purpose controller provided in an embodiment of the present invention; Figure 2 An exploded view of the vehicle-mounted multi-purpose controller provided in an embodiment of the present invention; Figure 3 A cross-sectional view of the vehicle-mounted multi-purpose controller provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the bottom shell of the vehicle-mounted multi-purpose controller provided in an embodiment of the present invention; Figure 5 A schematic diagram of the power supply circuit of the vehicle-mounted multi-purpose controller provided in an embodiment of the present invention; Figure 6 A circuit diagram of the first step-down unit and input protection circuit of the vehicle-mounted multi-purpose controller provided in an embodiment of the present invention; Figure 7 A circuit diagram of the second step-down unit of the vehicle-mounted multi-purpose controller provided in an embodiment of the present invention; Figure 8 A circuit diagram of the linear voltage regulator unit of the vehicle-mounted multi-purpose controller provided in an embodiment of the present invention; Figure 9 The circuit diagram of the motor drive unit of the vehicle-mounted multi-purpose controller provided in the embodiment of the present invention. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 this invention and simplifying the description, and do not 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 this invention.

[0022] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Figure 1 , Figure 2 and Figure 3 A schematic diagram of one embodiment of the vehicle-mounted multi-purpose controller of this application is shown. Figure 1 , Figure 2 and Figure 3As shown, the vehicle-mounted multi-purpose controller includes: a housing 100, the housing 100 having a grip portion 110 suitable for one-handed holding, and a control portion 120 located in front of the grip portion 110; a button assembly 200, the button assembly 200 being disposed on the control portion 120, and when the user holds the grip portion 110 with one hand, the user's operating fingers are within the touch range of the button assembly 200; and a control circuit board 300, fixed inside the housing 100 and electrically connected to the button assembly 200, the control circuit board 300 integrating a microcontroller, the microcontroller being used to execute received button signals conforming to a preset safety operation sequence, and to filter out button signals that do not conform to the preset safety operation sequence.

[0025] Specifically, the housing 100 is made of high-strength modified engineering plastic through precision injection molding. This material, formulated with a special formula, possesses excellent mechanical strength, toughness, and temperature resistance, allowing for long-term use within a wide temperature range of -30℃ to 85℃ without brittleness, softening, or deformation. The housing 100 is designed according to ergonomic principles, divided into two functional areas: a grip section 110 and a control section 120. The grip section 110, located in the rear half of the housing, has an approximately cylindrical structure, with its outer diameter and surface curvature matching the internal space of an adult's naturally clenched fist. During use, the user's palm encloses the grip section 110, with the four fingers (excluding the thumb) naturally bent and clenched. The palm and fingers fully conform to the outer wall of the grip section 110, providing stable and reliable support, preventing slippage even when hands are wet or gloves are worn. The control unit 120 is located at the front end of the grip unit 110. In the gripping state, the four fingers grip the grip unit 110 tightly, the base of the thumb rests on the side wall of the grip unit 110, and the tip of the thumb naturally extends forward, landing exactly on the front operating area of ​​the control unit 120.

[0026] The button assembly 200 is embedded in the mounting area 121 on the front of the control unit 120, and is integrated with the shape of the control unit 120. It includes multiple buttons, which correspond to function commands such as raising, lowering, extending, and retracting. When the user holds the grip unit 110 with one hand, the thumb naturally falls within the touch range of the button assembly 200, and all control commands can be input without adjusting the hand posture.

[0027] The control circuit board 300 is fixed to studs inside the housing 100 by screws and is electrically connected to the button assembly 200. The control circuit board 300 integrates a microcontroller with abundant I / O interfaces, high-precision AD conversion, and fast instruction processing capabilities. The microcontroller has a pre-written control program containing a preset safe operation sequence. This means the microcontroller only executes button signals input in a specific order and combination. For example, the operator must first press and hold the "Unlock / Start" button with their thumb, and then press a function key such as "Up" before the microcontroller recognizes the combination as a valid instruction and outputs a drive signal. If the operator presses a function key directly without pressing "Unlock / Start" or accidentally presses multiple keys simultaneously, these are all considered illegal signals that do not conform to the preset safe operation sequence and are directly filtered out, producing no output action. This eliminates the risk of erroneous operation from the source of the control logic.

[0028] This embodiment divides the housing into a grip section and a control section, and optimizes its shape according to ergonomics, allowing the operator to hold it securely with one hand, regardless of whether they are left- or right-handed. The index and middle fingers naturally fall within the touch area of ​​the button components, truly achieving ambidextrous one-handed blind operation. This completely frees the operator's other hand for other tasks, significantly improving operational flexibility and work efficiency. More importantly, the microcontroller integrated on the control circuit board has a built-in preset safe operation sequence verification mechanism. It only executes legitimate key input commands in a specific order and combination, filtering out all illegal signals generated by accidental touches, mishaps, or chaotic pressing. This eliminates the possibility of equipment malfunction from the source of the control logic, ensuring the personal safety of the operator and the safe operation of the equipment.

[0029] Based on the above embodiments, in other embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, the button assembly 200 includes a switch and a button silicone piece 220; the switch is disposed on the control circuit board 300 and electrically connected to the control circuit board 300; the top of the control part 120 is provided with a mounting area 121, the mounting area 121 has a first through hole 122, and the switch passes through the first through hole 122; the button silicone piece 220 is mounted on the mounting area 121, the button silicone piece 220 has a button protrusion 221, and the bottom of the button protrusion 221 abuts against the switch passing through the first through hole 122.

[0030] Specifically, the switch uses a tactile switch 210, a small surface-mount tactile switch, soldered and fixed to the control circuit board 300, and electrically connected to the control circuit board 300. The number of tactile switches 210 is set to 3 to 6 according to the control function requirements, corresponding to function commands such as rise, fall, extend, retract, start, and stop, with short trigger travel, clear tactile feedback, and rapid response. The front of the control unit 120 is provided with a mounting area 121, which is a flat circular concave structure. The mounting area 121 has first through holes 122 that correspond one-to-one with the number and position of the tactile switches 210. The top of each tactile switch 210 passes through the corresponding first through hole 122 and protrudes slightly from the bottom surface of the mounting area 121 to ensure precise contact with the button silicone part 220 above. The button silicone part 220 is integrally molded and installed in the mounting area 121. The edge of the button silicone part 220 is press-fitted with the mounting area 121 to form a completely sealed structure, effectively preventing moisture, dust, and other foreign objects from entering the housing 100 from the button area. The button silicone component 220 has an upwardly arched button protrusion 221, which is divided into button areas corresponding to each tactile switch 210. A circular contact point is formed at the bottom of the button protrusion 221, precisely abutting against the button of the tactile switch 210 passing through the first through-hole 122. When the user presses the button protrusion 221 with their thumb, the silicone body undergoes elastic deformation, the contact point moves downward, triggering the tactile switch 210; after release, the button silicone component 220 automatically rebounds due to its own elasticity, and the switch is turned off. This structure highly integrates the three functions of button sealing and protection, press elastic rebound, and switch triggering into one unit, resulting in a simple and compact structure with few parts and extremely high reliability.

[0031] Based on the above embodiments, in other embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, the control circuit board 300 is also equipped with indicator lights 310, each indicator light 310 corresponding to a switch; the button assembly 200 also includes a light-transmitting lens 230, which is ring-shaped and installed in the mounting area 121. The button protrusion 221 of the button silicone part 220 is engaged in the ring of the light-transmitting lens 230; the mounting area 121 has a second through hole 123, and the button silicone part 220 has a third through hole 222 at the position corresponding to the second through hole 123. The light emitted by the indicator light 310 passes through the second through hole 123 and the third through hole 222 in sequence, and then passes through the light-transmitting lens 230 to the outside.

[0032] Specifically, the control circuit board 300 is also equipped with indicator lights 310, which are LED beads soldered onto the control circuit board 300. Each indicator light 310 corresponds to a tactile switch 210, used to indicate the trigger status and function indication of the corresponding button. The button assembly 200 also includes a light-transmitting lens 230, which is injection molded from high-transmittance PC material and has an overall annular structure, snapped and fixed within the mounting area 121. The button protrusion 221 of the button silicone part 220 passes through the annular hole of the light-transmitting lens 230, without affecting the normal pressing operation of the thumb. The light-transmitting lens 230 has a smooth surface and uniform light transmission, and at the same time serves multiple functions such as protecting the button silicone part 220, decorating and beautifying the appearance, and guiding light indication. A second through hole 123 is also provided in the mounting area 121, and a third through hole 222 is provided on the button silicone part 220 at the position corresponding to the second through hole 123. The light-emitting position of the indicator light 310 corresponds to the position directly below the second through hole 123. When the indicator light 310 is lit, the light it emits passes sequentially through the second through-hole 123 and the third through-hole 222, and then is refracted and uniformly scattered by the annular light-transmitting lens 230, ultimately transmitting a soft and uniform surface light effect to the outside. This ensures that each button on the front of the control unit 120 can be clearly identified in nighttime or dimly lit environments. Users can confirm the button positions through both visual and tactile feedback, significantly enhancing the intuitiveness of human-computer interaction and operational safety. More importantly, this embodiment highly integrates multiple functions such as light transmission indication, button pressing, elastic rebound, and waterproof sealing within the limited mounting area 121 on the front of the control unit 120, achieving composite functions with an extremely simple structure.

[0033] Based on the above embodiments, in other embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, the housing 100 includes a front shell 101 and a bottom shell 102. The housing 100 is provided with an impact-resistant silicone assembly, which includes: a first impact-resistant silicone element 400, which is disposed at the bottom of the control part 120 of the bottom shell 102 and protrudes outward from the housing 100, with the protruding part forming a mounting mechanism; and a second impact-resistant silicone element 500, which is disposed at the junction of the bottom shell 102 and the front shell 101 at the control part 120.

[0034] Specifically, the housing 100 includes a front shell 101 and a bottom shell 102, both injection molded from the aforementioned high-strength modified engineering plastic and fastened together by multiple screws. Sealing ribs are provided at the joint surfaces; after fastening, the sealing ribs deform under pressure, forming a tight fit and achieving an overall seal of the housing 100. The housing 100 is equipped with an impact-resistant silicone assembly, including a first impact-resistant silicone component 400 and a second impact-resistant silicone component 500, both made of highly elastic, high-buffering, and aging-resistant silicone material. The first impact-resistant silicone component 400 is located at the bottom of the control section 120 of the bottom shell 102. A mounting hole is provided at the bottom of the control section 120 of the bottom shell 102. The first impact-resistant silicone component 400 is cylindrical and is securely fastened to the mounting hole by an interference fit, ensuring a firm installation and preventing it from easily falling off. The first impact-resistant silicone component 400 protrudes outward from the housing 100, and a circular flange is provided at the end of the protruding portion, forming a mounting mechanism. When the controller is dropped or impacted, the first shock-absorbing silicone component 400, as the initial contact point, absorbs and buffers most of the impact energy using the high elasticity of silicone, effectively protecting the housing 100 and internal components from direct impact damage. Simultaneously, this flange structure provides the controller with a mounting function, allowing it to be easily attached to vehicle hooks, round holes, railings, etc., for temporary hanging storage, enhancing both drop resistance and expanding usability. The second shock-absorbing silicone component 500 is a long strip-shaped elastomer installed at the junction of the bottom shell 102 and the front shell 101 at the control section 120, embedded around the edge of the control section 120. The second shock-absorbing silicone component 500 fills the gap between the front shell 101 and the bottom shell 102, enhancing the sealing, waterproofing, and dustproofing effect at the joint. Furthermore, when the controller is dropped or impacted from the side, it acts as a lateral buffer, deforming first to absorb lateral impact force, effectively protecting the corners of the housing 100 and the precision components such as buttons and switches installed inside from damage. With the dual protection of the first shock-resistant silicone component 400 and the second shock-resistant silicone component 500, the controller maintains structural integrity and normal function when dropped, thus improving the controller's drop resistance.

[0035] Based on the above embodiments, please refer to other embodiments as well. Figure 1 , Figure 2 , Figure 3 and Figure 4 The bottom shell 102 has a gripping part 110 with a magnetic mounting groove 130. A strong magnet 600 is disposed in the magnetic mounting groove 130. A top block 140 is disposed in the top shell 101 at a position corresponding to the magnetic mounting groove 130. The top block 140 is used to press the strong magnet 600 tightly when the top shell 101 and the bottom shell 102 are fastened together. A buffer sponge 700 is disposed between the strong magnet 600 and the top block 140.

[0036] Specifically, a magnetic mounting groove 130 is provided on the inner side of the grip portion 110 of the bottom shell 102, located near the rear of the grip portion 110. Its shape matches the outline of the strong magnet 600, providing precise installation positioning for the strong magnet 600. The strong magnet 600 uses a high-performance neodymium iron boron permanent magnet, with a square or round shape, and is embedded in the magnetic mounting groove 130 and firmly fixed by an interference fit. The strong magnet 600 has a strong magnetic force, capable of firmly adhering the controller to ferromagnetic surfaces such as iron car bodies, metal tool cabinets, and metal brackets. The adsorption force is sufficient to withstand the weight of the controller itself and the bumps and vibrations generated during vehicle movement without falling off, allowing for easy fixing after use. An integrally injection-molded top block 140 is provided inside the front shell 101 at a position corresponding to the magnetic mounting groove 130. After the faceplate 101 and bottomplate 102 are fastened with locking screws, the end face of the top block 140 presses against the upper surface of the strong magnet 600, applying a downward clamping force to the strong magnet 600 to prevent displacement, shaking, or abnormal noise within the magnetic mounting groove 130. A buffer sponge 700 is sandwiched between the strong magnet 600 and the top block 140. The buffer sponge 700 is a soft, porous, elastic material that fills the assembly gap between the strong magnet 600 and the top block 140, eliminating frictional noise that may be caused by hard contact. It also absorbs and buffers external vibrations and impacts, protecting the strong magnet 600 from breakage or demagnetization due to prolonged and severe vibration. The magnetic absorption assembly of this embodiment allows the controller to be easily attached to any metal location inside the vehicle after use, making it quick to access, stable to place, and without taking up extra space.

[0037] Based on the above embodiments, in other embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, the rear of the housing 100 is also provided with a light guide 800 and a light strip 810. The light strip 810 is electrically connected to the control circuit board 300. The light guide 800 is embedded in the light guide mounting groove on the side of the housing 100 and covers the light strip 810.

[0038] Specifically, the rear of the housing 100 is also equipped with a light guide 800 and a light strip 810. The light strip 810 is a long strip-shaped LED light panel with multiple LED beads distributed on it. It is electrically connected to the control circuit board 300 through wires and can emit light of different colors to indicate different states such as power on, standby ready, normal operation, and fault alarm. The light guide 800 is made of diffused PC material, and its shape matches the light guide mounting groove on the side of the housing 100. The light guide 800 is embedded in the light guide mounting groove and completely covers the light strip 810. The light guide 800 can convert the point light source emitted by the LED beads on the light strip 810 into a soft strip-shaped surface light source that is evenly distributed along the length of the light guide 800. The light is soft and not dazzling. Whether in a bright daytime environment or a dark nighttime environment, the operator can clearly identify the working status of the controller. The tail light guide 800 works in conjunction with the indicator lights 310 in the button area to form a dual visual feedback system of partial and overall indication, which further enhances the operator's convenience in identifying the controller status and the safety of operation.

[0039] Based on the above embodiments, in other embodiments, such as Figure 5 As shown, the control circuit board 300 also integrates a power supply circuit, which includes a first buck unit 910, a second buck unit 920, and a linear regulator unit 930. The input terminal of the first buck unit 910 is connected to the vehicle DC input voltage, and the output terminal of the first buck unit 910 outputs a first voltage. The first buck unit 910 is an asynchronous buck DC-DC converter. The input terminal of the second buck unit 920 is connected to the output terminal of the first buck unit 910, and the output terminal of the second buck unit 920 outputs a second voltage. The second buck unit 920 is a synchronous buck DC-DC converter. The input terminal of the linear regulator unit 930 is connected to the output terminal of the second buck unit 920, and the output terminal of the linear regulator unit 930 outputs a third voltage. The output terminal of the linear regulator unit 930 is connected to the power supply pin of the microcontroller.

[0040] Specifically, the control circuit board 300 also integrates a power supply circuit, employing a three-stage series buck architecture to refine voltage quality at each stage, providing a stable and clean operating power supply for different functional modules. The input of the first buck unit 910 is connected to the vehicle's DC input voltage, which has a wide fluctuation range of 10–16.8V, suitable for various vehicle batteries and generator systems. The output of the first buck unit 910 is a +12V voltage, primarily supplying relays, motor drive units, drive boards, and other analog and power circuits requiring higher voltage and current. The first buck unit 910 is an asynchronous buck DC-DC converter, using the LGS6302 asynchronous buck chip U6 as its core component. It employs an asynchronous Buck topology, featuring a wide input voltage range and strong driving capability. The input of the second buck unit 920 is connected to the +12V output of the first buck unit 910, and its output is a +5V voltage, primarily supplying peripheral circuits such as the indicator light 310, drive circuit interface, and the pre-amplifier stage of the linear regulator unit 930. The second buck unit 920 is a synchronous buck DC-DC converter. Its core component is the MP2315GJ-Z synchronous buck chip U22, which integrates two low-on-resistance MOSFETs to replace the freewheeling diodes in traditional asynchronous topologies. This results in low conduction loss and high conversion efficiency, making it particularly suitable for medium-current loads. The linear regulator unit 930's input is connected to the +5V output of the second buck unit 920, and its output is a third voltage of +3.3V. The output of the linear regulator unit 930 is directly connected to the microcontroller's power supply pin VDD_1. The linear regulator unit 930 uses the AMS1117-3.3 low-dropout linear regulator U, operating in linear mode with no high-frequency switching, extremely low output ripple, and virtually zero electromagnetic interference. It is specifically designed to provide extremely clean power to microcontrollers and core circuits such as button sampling and digital logic that are sensitive to power supply noise. The three-stage series power supply architecture of "asynchronous DC-DC to 12V → synchronous DC-DC to 5V → LDO to 3.3V" created in this embodiment ensures the high-efficiency driving capability of the power stage, while achieving extremely low noise in the final output through progressive refinement. It effectively isolates the power supply of the high-voltage drive from the low-voltage sensitive core in terms of frequency and noise, ensuring that the microcontroller operates stably and reliably in the complex electromagnetic environment of the vehicle, without crashing, resetting or false triggering. This is one of the key inventive designs of this invention.

[0041] Based on the above embodiments, in other embodiments, such as Figure 6As shown, the first step-down unit 910 includes a first step-down chip U6, a Zener diode D4, a first voltage divider resistor R16, a second voltage divider resistor R17, a power inductor L1, a freewheeling diode D1, a first feedback resistor R1, and a second feedback resistor R2. One end of the first voltage divider resistor R16 is connected to the vehicle's DC input voltage, and the other end of the first voltage divider resistor R16 is connected to one end of the second voltage divider resistor R17 and the cathode of the Zener diode D4. The other end of the second voltage divider resistor R17 is grounded, and the anode of the Zener diode D4 is grounded. The common terminal of the first voltage divider resistor R16 and the second voltage divider resistor R17 is connected to the first... The enable pin of the buck converter U6; one end of the power inductor L1 is connected to the switch pin of the first buck converter U6, and the other end of the power inductor L1 outputs the first voltage; the cathode of the freewheeling diode D1 is connected to the common terminal of the power inductor L1 and the first voltage output terminal, and the anode of the freewheeling diode D1 is grounded; one end of the first feedback resistor R1 is connected to the first voltage output terminal, the other end of the first feedback resistor R1 is connected to one end of the second feedback resistor R2, the other end of the second feedback resistor R2 is grounded, and the common terminal of the first feedback resistor R1 and the second feedback resistor R2 is connected to the feedback pin of the first buck converter U6.

[0042] Specifically, the first step-down unit 910 includes a first step-down chip U6 (model LGS6302), a Zener diode D4, a first voltage divider resistor R16, a second voltage divider resistor R17, a power inductor L1, a freewheeling diode D1, a first feedback resistor R1, a second feedback resistor R2, input filter capacitors C13 and C43, and output filter capacitors C3 and C46. The on-board DC input voltage of 10-16.8V is connected to the VIN power pin of U6 after passing through the input protection circuit. A large-capacity electrolytic capacitor C13 and a high-frequency ceramic capacitor C43 are connected in parallel at the VIN pin for input filtering. Simultaneously, the vehicle's DC input voltage is divided by a voltage divider network consisting of a first voltage divider resistor R16 and a second voltage divider resistor R17. One end of the first voltage divider resistor R16 is connected to the vehicle's DC input voltage, and the other end of R16 is connected to one end of the second voltage divider resistor R17 and the cathode of the Zener diode D4. The other end of the second voltage divider resistor R17 is grounded, and the anode of the Zener diode D4 is grounded. The common terminal of the first voltage divider resistor R16 and the second voltage divider resistor R17 is connected to the enable pin EN / UVLO of U6. This connection method constitutes a hardware undervoltage lockout circuit: when the vehicle's input voltage falls below a preset safety threshold due to battery depletion, voltage drop in cold environments, or voltage drop during startup, the potential at the voltage divider point of R16 and R17 decreases accordingly, insufficient to enable the U6 chip, and U6 automatically shuts off power output. This undervoltage lockout is entirely implemented in hardware, requiring no microcontroller intervention, resulting in extremely fast response speed. It effectively prevents downstream circuits from malfunctioning under undervoltage conditions, protecting the entire system for safe and reliable operation. One end of the power inductor L1 is connected to the switching pin SW of U6, and the other end serves as the output terminal of the first voltage, +12V. The freewheeling diode D1 is a Schottky diode; its cathode is connected to the common node between the power inductor L1 and the first voltage output terminal, and its anode is grounded, forming a freewheeling loop in an asynchronous Buck topology. This provides a path for the inductor current during the off-state of the internal switch in U6, ensuring a continuous and stable output current. One end of the first feedback resistor R1 is connected to the first voltage output terminal, +12V, and the other end of R1 is connected to one end of the second feedback resistor R2. The other end of R2 is grounded, and the common terminal of the two feedback resistors is connected to the feedback pin FB of U6. The internal error amplifier of U6 compares the voltage sampled at the FB pin with the internal reference voltage and dynamically adjusts the duty cycle of the internal switch based on the difference, achieving closed-loop voltage regulation control and ensuring the output voltage is accurately stabilized at +12V.

[0043] Furthermore, the second buck unit 920 includes a second buck chip U22, a bootstrap capacitor C41, a third feedback resistor R13, a fourth feedback resistor R38, and a second power inductor L2; the bootstrap capacitor C41 is connected between the bootstrap pin of the second buck chip U22 and the switching node; one end of the second power inductor L2 is connected to the switching node of the second buck chip U22, and the other end of the second power inductor L2 outputs a second voltage; one end of the third feedback resistor R13 is connected to the second voltage output terminal, the other end of the third feedback resistor R13 is connected to one end of the fourth feedback resistor R38, the other end of the fourth feedback resistor R38 is grounded, and the common terminal of the third feedback resistor R13 and the fourth feedback resistor R38 is connected to the feedback pin of the second buck chip U22.

[0044] Specifically, the second buck unit 920 includes a second buck chip U22 (model MP2315GJ-Z), a bootstrap capacitor C41, a third feedback resistor R13, a fourth feedback resistor R38, and a second power inductor L2. The +12V voltage output from the first buck unit 910 is connected to the VIN power supply pin of U22, and an input filter capacitor is configured at the input terminal for decoupling. The bootstrap capacitor C41 is connected between the bootstrap pin BST of U22 and the switching node SW. Its function is to provide a floating drive voltage higher than the input voltage for the high-side drive circuit when the high-side MOSFET inside U22 needs to be turned on, ensuring that the gate-source voltage of the high-side MOSFET is large enough to reliably and quickly turn on. It is a key peripheral component for the synchronous buck chip to operate normally under higher input voltages. One end of the second power inductor L2 is connected to the switching node SW of U22, and the other end outputs a second voltage of +5V. The U22 integrates two low-on-resistance N-channel MOSFETs, which alternately conduct during operation: when the upper MOSFET is on, the +12V input charges and stores energy in L2 and supplies power to the load; when the lower MOSFET is on, L2 releases energy through the lower MOSFET's freewheeling current. One end of the third feedback resistor R13 is connected to the +5V output terminal, and the other end of R13 is connected to one end of the fourth feedback resistor R38. The other end of R38 is grounded, and the common terminal of the two feedback resistors is connected to the feedback pin FB of the U22. The U22 internally adjusts the duty cycle of the alternating conduction of the upper and lower MOSFETs in real time according to the feedback voltage of the FB pin, precisely stabilizing the output voltage at +5V. Due to the synchronous rectification architecture, the voltage drop when the lower MOSFET is on is much smaller than the forward voltage drop of a Schottky diode, significantly reducing conduction losses, resulting in high conversion efficiency and low heat generation. This makes it possible to achieve efficient medium-current 5V power supply within a limited 100mm sealed enclosure, providing a stable pre-stage voltage for the subsequent linear regulator unit 930.

[0045] Furthermore, such as Figure 8As shown, the input terminal of the linear regulator unit 930 is electrically connected to the voltage output terminal of the second buck unit 920, receiving the +5V second voltage output by the second buck unit 920. After regulation, the linear regulator unit 930 outputs a stable +3.3V third voltage, and the third voltage output terminal is directly connected to the power supply pin (VDD_1) of the microcontroller, providing clean DC power to the microcontroller, key detection circuit, indicator light 310, signal ESD protection circuit, and other low-voltage logic modules. The core component of the linear regulator unit 930 is the AMS1117-3.3 linear regulator chip U. This chip is a fixed-output low-dropout linear regulator with a fixed output voltage of 3.3V. On the input circuit side of the chip U, an input decoupling capacitor bank is connected in parallel, consisting of a large-capacity aluminum electrolytic capacitor C11 and a high-frequency ceramic capacitor C14. One end of C11 and C14 is connected to the VIN input terminal of the chip U, and the other end is grounded. Among them, electrolytic capacitor C11 has a large capacitance, mainly suppressing the low-frequency voltage ripple and transient voltage drops remaining in the preceding synchronous buck DC-DC circuit; ceramic capacitor C14 has extremely low high-frequency equivalent series resistance, specifically filtering out high-frequency switching interference and spikes coupled from the preceding switching power supply. The combination of these two capacitors forms a wideband decoupling network, effectively filtering out residual noise from the preceding power supply and preventing voltage fluctuations from affecting the operational stability of the voltage regulator chip U. On the voltage output circuit side of chip U, an output filter capacitor group is configured in parallel, consisting of electrolytic capacitor C4 and high-frequency ceramic capacitor C10. One end of C4 and C10 is connected to the VOUT output terminal (+3.3V) of chip U, and the other end is grounded. This filter capacitor group can significantly improve the load transient response capability of the linear regulator unit 930: when the microcontroller instantaneously starts AD conversion, drives the I / O port, or switches operating modes, causing sudden changes in load current, C4 and C10 can quickly charge and discharge to replenish the current, suppressing output voltage spikes and small fluctuations, and reducing power supply ripple noise. Actual measurements show that the output voltage ripple under this configuration can be controlled below 30mV, providing a low-ripple, high-precision stable operating voltage for the back-end microcontroller.

[0046] Compared to the DC-DC switching power supply architecture used in the first and second buck units 910 and 920, this linear regulator unit 930 operates in linear mode. Its internal power regulation transistor operates in the linear region, eliminating high-frequency switching operations and thus preventing switching frequency interference. The spectral purity of the output power supply is significantly higher than that of a switching power supply. This characteristic makes it specifically suited for the low-voltage digital circuits within vehicle controllers that are sensitive to power supply noise, especially the microcontroller's analog sampling and key level detection circuits. It avoids sampling deviations or false triggering caused by switching power supply ripple coupling, achieving precise buck regulation over a wide input voltage range and ensuring long-term stable operation of the microcontroller in the complex electromagnetic environment of an automotive system.

[0047] Based on the above embodiments, in other embodiments, such as Figure 9 As shown, the control circuit board 300 also integrates a motor drive unit, which includes a transistor Q4, a power MOSFET Q7, a first resistor R15, a second resistor R20, a third resistor R39, a fourth resistor R40, a first diode D6, and a second diode D12. The two ends of the first resistor R15 are connected to the output pin of the microcontroller U1 and the base of the transistor Q4, respectively. One end of the second resistor R20 is connected to the base of the transistor Q4, and the other end is grounded. The emitter of the transistor Q4 is grounded, and the collector of the transistor Q4 is connected to one end of the third resistor R39. The other end of the third resistor R39 is connected to the gate of the power MOSFET Q7. The gate of the power MOSFET Q7 is also connected to one end of the fourth resistor R40, and the other end of the fourth resistor R40 is connected to the power supply. The drain of the power MOSFET Q7 is connected to the high-voltage terminal of the vehicle DC power supply, and the source of the power MOSFET Q7 is led out as the drive output terminal for connecting to an external high-power motor. The first diode D6 and the second diode D12 are connected in parallel between the motor output terminal and ground, respectively. The first diode D6 and the second diode D12 are bidirectional ESD protection diodes, used to discharge abnormal high voltage and electrostatic pulses at the motor load terminal to ground.

[0048] Specifically, the control circuit board 300 also integrates a motor drive unit, which converts the low-voltage logic control signal (3.3V level) output by the microcontroller U1 into a high-voltage drive signal capable of driving an external high-power DC motor. This is a key interface circuit for achieving small-to-large and low-voltage-to-high-voltage control. The motor drive unit includes an NPN transistor Q4, a power MOSFET Q7, a first resistor R15, a second resistor R20, a third resistor R39, and a fourth resistor R40. One end of the first resistor R15 is connected to the output pin of the microcontroller U1 (e.g., PB8), and the other end is connected to the base of the transistor Q4. The first resistor R15 acts as a base current-limiting resistor to prevent excessive output current from the microcontroller U1 from damaging its own pins or the transistor Q4. One end of the second resistor R20 is connected to the base of the transistor Q4, and the other end is grounded, forming a base pull-down resistor. The pull-down resistor serves the following purposes: When the microcontroller U1 is not powered on and the I / O port is in a high-impedance state during initialization, the second resistor R20 clamps the base of transistor Q4 to a low level, ensuring reliable cutoff of transistor Q4, preventing mis-conduction by power MOSFET Q7, and avoiding uncontrollable motor movement at power-on, thus ensuring the system's power-on safety. The emitter of transistor Q4 is grounded, and the collector of transistor Q4 is connected to one end of the third resistor R39. The other end of the third resistor R39 is connected to the gate of power MOSFET Q7, and transistor Q4 controls the gate potential of power MOSFET Q7 through the third resistor R39. The gate of power MOSFET Q7 is also connected to one end of the fourth resistor R40, and the other end of the fourth resistor R40 is connected to the power supply (from the +12V output of the first buck unit 910). The drain of power MOSFET Q7 is connected to the high-voltage terminal of the vehicle's DC power supply, and the source of power MOSFET Q7 is led out as a drive output terminal for connecting to an external high-power motor. When the microcontroller U1 outputs a high-level signal, transistor Q4 enters saturation conduction, pulling down the gate potential of power MOSFET Q7, turning on power MOSFET Q7 and connecting the external motor power supply for operation. When the microcontroller U1 outputs a low-level signal, transistor Q4 is turned off, and the gate of power MOSFET Q7 is pulled up and kept off through the fourth resistor R40, stopping the motor. This motor drive unit circuit has a simple structure, using a low-power transistor Q4 to drive power MOSFET Q7 to achieve low-voltage control of high-voltage circuits, while simultaneously isolating the control loop from the power loop, preventing electromagnetic interference from the high-power loop from backflowing back to the control core. To enhance the reliability and protection capability of the motor drive unit in the automotive electrical environment, the collector of transistor Q4 is connected to the gate of power MOSFET Q7 through the third resistor R39. The third resistor R39 acts as a gate current limiter, preventing damage to power MOSFET Q7 from sudden level changes. The fourth resistor R40 is a pull-up discharge resistor for the gate of power MOSFET Q7, stabilizing the gate's static potential, preventing interference-induced false turn-on, and releasing residual charge on the gate.The motor is a typical inductive load, and high voltage spikes and electrostatic surges are easily generated during switching. The first diode D6 and the second diode D12 are connected in parallel between the motor output terminal and ground. The first diode D6 and the second diode D12 are bidirectional ESD protection diodes, which can quickly discharge abnormal high voltage and electrostatic pulses from the motor load terminal to ground, clamp the output voltage, suppress electromagnetic interference, and effectively improve the shock resistance and long-term reliability of the motor drive unit driving inductive loads.

[0049] Based on the above embodiments, in other embodiments, such as Figure 6 As shown, the control circuit board 300 also integrates an input protection circuit, which includes a first bidirectional ESD protection diode D5, a second bidirectional ESD protection diode D2, a resettable fuse FU1, a first capacitor C13, and a second capacitor C43. The resettable fuse FU1 is connected in series on the positive line of the power input terminal. One end of the first bidirectional ESD protection diode D5 is connected to the output terminal of the resettable fuse FU1, and the other end is grounded. One end of the second bidirectional ESD protection diode D2 is connected to the output terminal of the resettable fuse FU1, and the other end is grounded. The first capacitor C13 is an electrolytic capacitor, with one end connected to the output terminal of the resettable fuse FU1 and the other end grounded. The second capacitor C43 is a ceramic capacitor, with one end connected to the output terminal of the resettable fuse FU1 and the other end grounded.

[0050] Specifically, the control circuit board 300 also integrates an input protection circuit, connected in series at the very beginning of the power input terminal, serving as the first line of defense for all subsequent circuits. The input protection circuit includes a first bidirectional ESD protection diode D5, a second bidirectional ESD protection diode D2, a resettable fuse FU1, a first capacitor C13, and a second capacitor C43. The resettable fuse FU1 is connected in series on the positive terminal of the power input. Under normal load current, it exhibits extremely low on-resistance, having almost no impact on the power supply circuit. When a short circuit occurs in a component, a short circuit in the printed circuit board trace, or an abnormal overload causes a sharp increase in current, the resettable fuse FU1 heats up rapidly. The material undergoes a phase change, causing its resistance to increase dramatically to a megaohm level, nearly cutting off the input power and limiting the current to a very small, safe leakage current level, thus achieving overcurrent and short-circuit protection. After the fault is cleared and the circuit cools down, the resettable fuse FU1 automatically returns to a low-resistance conducting state, requiring no manual replacement, significantly improving the equipment's maintenance convenience and continuous availability. One end of the first bidirectional ESD protection diode D5 is connected to the output terminal of the resettable fuse FU1, and the other end is grounded; one end of the second bidirectional ESD protection diode D2 is also connected to the output terminal of the resettable fuse FU1, and the other end is grounded. The first bidirectional ESD protection diode D5 and the second bidirectional ESD protection diode D2 together form a dual-path electrostatic protection structure. Both are TVS array chips with nanosecond-level response speeds, capable of instantly absorbing surge pulses generated by electrostatic discharge, cable plugging / unplugging operations, and transient high-voltage interference coupled from the vehicle power supply line, clamping the voltage within a safe range below its breakdown voltage. The dual-path parallel design further enhances the surge current absorption capacity and protection redundancy. Even if one path fails under extreme conditions, the other path can still independently provide electrostatic surge protection, effectively preventing sensitive devices such as the first step-down chip U6, the second step-down chip U22, and the microcontroller U1 from being damaged by high voltage breakdown. The first capacitor, C13, is a large-capacity aluminum electrolytic capacitor, with one end connected to the output terminal of the resettable fuse FU1 and the other end grounded. The second capacitor, C43, is a high-frequency ceramic capacitor, also with one end connected to the same output terminal and the other end grounded. The first capacitor C13 and the second capacitor C43 are connected in parallel to form a wideband decoupling network. The first capacitor C13 filters out low-frequency ripple and transient voltage drops in the input power supply, while the second capacitor C43 filters out high-frequency switching noise and spikes. Together, they purify the poor-quality vehicle power supply into a relatively flat DC voltage, reducing the impact of electromagnetic interference on the subsequent first buck unit 910, second buck unit 920, and linear regulator unit 930. This input protection circuit, with its extremely simple component configuration, simultaneously achieves overcurrent self-recovery protection, dual-channel electrostatic surge fast clamping absorption, and wideband power supply filtering purification—fully adaptable to the complex power supply environment of vehicles.

[0051] Based on the above embodiments, in other embodiments, such as Figure 2As shown, a drive board is also fixed inside the housing 100. The drive board is electrically connected to the control circuit board 300, and multiple power MOSFETs are integrated on the drive board.

[0052] Specifically, a driver board, an independent small PCB board, is also fixed inside the housing 100. It is electrically connected to the control circuit board 300 via inter-board pin header connectors or wires. This design, which physically separates the main control board from the driver board, spatially isolates the high-current, high-heat, and strong electromagnetic interference power drive section from the low-voltage control section such as the microcontroller and signal acquisition, effectively reducing electromagnetic interference crosstalk and improving the overall electromagnetic compatibility and reliability of the system. The driver board integrates multiple power MOSFETs, specifically four MOSFETs M1, M2, M3, and M4, all in TO-252 (DPAK) packages. These MOSFETs have large-area metal heat sinks, which, after being soldered onto the PCB copper foil, can effectively dissipate heat using the copper foil area. The on-resistance is as low as milliohms, and the current carrying capacity is strong, capable of withstanding continuous currents of tens of amperes or even greater, fully meeting the drive requirements of high-power DC motors such as vehicle-mounted lifting tailgates and lifting platforms. Four MOSFETs, M1 to M4, form a standard H-bridge full-bridge driver circuit on the driver board. M1 and M3 are the upper and lower transistors of the left bridge arm, and M2 and M4 are the upper and lower transistors of the right bridge arm. The midpoints of the two bridge arms are connected to the two ends of an external DC motor. The microcontroller outputs control signals to the gates of each MOSFET through the pre-drive circuit on the driver board: when M1 and M4 are both turned on, the +12V power supply flows through M1, the motor winding, and M4 to ground, and the current flows forward through the motor, causing the motor to rotate forward, achieving the "rising" or "extending" action; when M2 and M3 are both turned on, the +12V power supply flows through M2, the motor winding, and M3 to ground, and the current flows backward through the motor, causing the motor to rotate in reverse, achieving the "falling" or "retracting" action. By outputting PWM signals from the microcontroller to control the duty cycle of MOSFETs M1 to M4, soft start, soft stop, and speed regulation functions of the motor can also be realized, improving the smoothness of equipment operation. The microcontroller also monitors the voltage across the sampling resistor connected in series between the common terminal of the lower arm of the H-bridge and ground in real time via the ADC channel to obtain the motor operating current. Once the current exceeds a preset threshold, indicating that the motor may be stalled, overloaded, or short-circuited, the microcontroller immediately shuts down all four MOSFETs M1 to M4, cutting off the output power and achieving dual protection for both the controller and the external motor. Some MOSFETs M1 to M4 also integrate over-temperature protection, forming a redundant protection mechanism with the microcontroller's software overcurrent protection. Multiple elliptical heat dissipation holes are also provided on the driver board to enhance air convection and dissipate the heat generated by the MOSFETs M1 to M4 more quickly outside the housing 100, ensuring that high-current operation does not cause overheating. The independent driver board design in this embodiment effectively decouples the high-current power drive from the control core, significantly improving drive capability, electromagnetic compatibility, and system reliability.

[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vehicle-mounted multi-purpose controller, characterized in that, include: A housing having a grip portion suitable for one-handed holding and a control portion located in front of the grip portion; A button assembly is disposed on the control unit, and when the user holds the control unit with one hand, the user's operating fingers are within the touch range of the button assembly; A control circuit board is fixed inside the housing and electrically connected to the button assembly. The control circuit board integrates a microcontroller, which is used to execute received button signals that conform to a preset safe operation sequence and filter out button signals that do not conform to the preset safe operation sequence.

2. The vehicle-mounted multi-purpose controller according to claim 1, characterized in that, The button assembly includes a switch and a button silicone component; The switch is mounted on the control circuit board and is electrically connected to the control circuit board. The top of the control unit is provided with a mounting area, and the mounting area has a first through hole through which the switch passes. The silicone button component is installed in the mounting area. The silicone button component has a button protrusion, and the bottom of the button protrusion abuts against the switch passing through the first through hole.

3. The vehicle-mounted multi-purpose controller according to claim 2, characterized in that, The control circuit board is also equipped with indicator lights, and each indicator light corresponds to a switch; The button assembly also includes a light-transmitting lens, which is annular and installed in the mounting area. The button protrusion of the button silicone part is engaged within the annular lens. The mounting area has a second through hole, and the button silicone part has a third through hole at the position corresponding to the second through hole. The light emitted by the indicator light passes through the second through hole and the third through hole in sequence, and then is transmitted to the outside through the light-transmitting lens.

4. The vehicle-mounted multi-purpose controller according to claim 1, characterized in that, The housing includes a front shell and a bottom shell, and the housing is provided with an impact-resistant silicone assembly, the impact-resistant silicone assembly comprising: The first impact-resistant silicone part is located at the bottom of the control part of the bottom shell and protrudes outward from the shell. The outwardly protruding part constitutes the mounting mechanism. The second impact-resistant silicone part is disposed at the junction of the bottom shell and the top shell at the control part.

5. The vehicle-mounted multi-purpose controller according to claim 4, characterized in that, The bottom shell has a magnetic mounting groove for its gripping part, and a strong magnet is disposed in the magnetic mounting groove. A top block is disposed in the top shell at a position corresponding to the magnetic mounting groove. The top block is used to press the strong magnet tightly when the top shell and the bottom shell are fastened together. A cushioning sponge is disposed between the strong magnet and the top block.

6. The vehicle-mounted multi-purpose controller according to claim 1, characterized in that, The rear end of the housing is also provided with a light guide and a light strip. The light strip is electrically connected to the control circuit board. The light guide is embedded in the light guide mounting groove on the side of the housing and covers the light strip.

7. The vehicle-mounted multi-purpose controller according to claim 1, characterized in that, The control circuit board also integrates a power supply circuit, which includes a first step-down unit, a second step-down unit, and a linear regulator unit. The input terminal of the first step-down unit is connected to the vehicle DC input voltage, and the output terminal of the first step-down unit outputs a first voltage. The first step-down unit is an asynchronous step-down DC-DC converter. The input terminal of the second buck unit is connected to the output terminal of the first buck unit, and the output terminal of the second buck unit outputs a second voltage. The second buck unit is a synchronous buck DC-DC converter. The input terminal of the linear regulator unit is connected to the output terminal of the second buck unit, the output terminal of the linear regulator unit outputs a third voltage, and the output terminal of the linear regulator unit is connected to the power supply pin of the microcontroller.

8. The vehicle-mounted multi-purpose controller according to claim 7, characterized in that, The first step-down unit includes a first step-down chip, a Zener diode, a first voltage divider resistor, a second voltage divider resistor, a power inductor, a freewheeling diode, a first feedback resistor, and a second feedback resistor; One end of the first voltage divider resistor is connected to the vehicle DC input voltage, and the other end of the first voltage divider resistor is connected to one end of the second voltage divider resistor and the cathode of the Zener diode. The other end of the second voltage divider resistor is grounded, and the anode of the Zener diode is grounded. The common terminal of the first voltage divider resistor and the second voltage divider resistor is connected to the enable pin of the first buck chip. One end of the power inductor is connected to the switching pin of the first step-down chip, and the other end of the power inductor outputs the first voltage; The negative terminal of the freewheeling diode is connected to the common terminal of the power inductor and the first voltage output terminal, and the positive terminal of the freewheeling diode is grounded. One end of the first feedback resistor is connected to the first voltage output terminal, the other end of the first feedback resistor is connected to one end of the second feedback resistor, the other end of the second feedback resistor is grounded, and the common terminal of the first feedback resistor and the second feedback resistor is connected to the feedback pin of the first step-down chip. The second buck unit includes a second buck chip, a bootstrap capacitor, a third feedback resistor, a fourth feedback resistor, and a second power inductor; The bootstrap capacitor is connected between the bootstrap pin and the switching node of the second buck chip; One end of the second power inductor is connected to the switching node of the second step-down chip, and the other end of the second power inductor outputs the second voltage; One end of the third feedback resistor is connected to the second voltage output terminal, the other end of the third feedback resistor is connected to one end of the fourth feedback resistor, the other end of the fourth feedback resistor is grounded, and the common terminal of the third feedback resistor and the fourth feedback resistor is connected to the feedback pin of the second step-down chip.

9. The vehicle-mounted multi-purpose controller according to claim 1, characterized in that, The control circuit board also integrates a motor drive unit, which includes a transistor, a power MOSFET, a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, and a second diode. The two ends of the first resistor are respectively connected to the output pin of the microcontroller and the base of the transistor; One end of the second resistor is connected to the base of the transistor, and the other end is grounded; The emitter of the transistor is grounded, and the collector of the transistor is connected to the gate of the power MOSFET. The drain of the power MOSFET is connected to the power supply, and the source of the power MOSFET is used to connect to an external high-power motor. The collector of the transistor is connected to the gate of the power MOSFET via the third resistor; One end of the fourth resistor is connected to the gate of the power MOSFET, and the other end is connected to the power supply. One end of the first diode is connected to the source of the power MOSFET, and the other end is grounded; One end of the second diode is connected to the source of the power MOSFET, and the other end is grounded.

10. The vehicle-mounted multi-purpose controller according to claim 1, characterized in that, The control circuit board also integrates an input protection circuit, which includes a first bidirectional ESD protection diode, a second bidirectional ESD protection diode, a resettable fuse, a first capacitor, and a second capacitor. The resettable fuse is connected in series with the positive terminal of the power input. One end of the first bidirectional ESD protection diode is connected to the output terminal of the self-resetting fuse, and the other end is grounded; One end of the second bidirectional ESD protection diode is connected to the output terminal of the self-resetting fuse, and the other end is grounded; The first capacitor is an electrolytic capacitor, one end of which is connected to the output terminal of the resettable fuse, and the other end is grounded; The second capacitor is a ceramic capacitor, one end of which is connected to the output terminal of the resettable fuse, and the other end is grounded.

11. The vehicle-mounted multi-purpose controller according to claim 1, characterized in that, A drive board is also fixed inside the housing. The drive board is electrically connected to the control circuit board, and multiple power MOSFETs are integrated on the drive board.

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