A power mode selection switch

Abstract

This invention provides a power mode selection switch, applied in the field of selection switch technology. It includes a band switch and a circuit board. The circuit board receives the gear position signal from the band switch and transmits it to the engine. The engine collects the gear position information from the band switch according to a communication protocol to output corresponding power. The circuit board includes a main control module, an input module, and a communication module. The detection pin of the main control module is connected to the gear position contact of the band switch. An input module, including multiple RC circuits, is connected between the main control module and the band switch. The main control module is connected to the engine through the communication module, which includes a communication chip U5 for signal transmission and conversion between the main control module and the generator. This power mode selection switch has a compact structure, reliable identification, and good anti-interference performance and system stability.

Description

Technical Field

[0001] This utility model belongs to the field of selection switch technology, specifically relating to a power mode selection switch. Background Technology

[0002] A gear selector switch is a multi-gear signal input device used in vehicle or equipment control systems. Users can switch between multiple preset gears by turning a knob or toggling to select different operating modes.

[0003] Existing band selector switches mostly use discrete level outputs, requiring multiple signal lines to connect to the engine. This results in complex wiring, lacks communication capabilities, and cannot be seamlessly integrated with the vehicle's CAN bus. Consequently, the engine cannot acquire accurate information in real time, affecting the response of the vehicle's intelligent control system. Furthermore, the traditional structure, with its multiple signal lines, is susceptible to electromagnetic interference, wiring harness aging, or poor contact, leading to system instability; it also increases the complexity and cost of overall vehicle wiring.

[0004] Therefore, a selection switch that is easy to integrate and has a stable signal is needed. Utility Model Content

[0005] In view of the above-mentioned problems in the prior art, the purpose of this utility model is to provide a power mode selection switch with a compact structure, reliable identification, good anti-interference performance and system stability.

[0006] A power mode selection switch includes a band switch and a circuit board. The circuit board receives the gear position signal from the band switch and transmits it to the engine. The engine collects the gear position information from the band switch according to a communication protocol to output corresponding power. The circuit board includes a main control module, an input module, and a communication module. The detection pin of the main control module is connected to the gear position contact of the band switch. An input module is connected between the main control module and the band switch. The input module includes multiple RC circuits. The main control module is connected to the engine through the communication module. The communication module includes a communication chip U5 for signal transmission and conversion between the main control module and the generator.

[0007] Preferably, the main control module includes a microcontroller U2, and the NRST pin of the microcontroller U2 is connected to a resistor R4 and a capacitor C6 in parallel. The other end of the resistor R4 is connected to the output terminal of the power supply module, and the other end of the capacitor C6 is grounded.

[0008] Preferably, a crystal oscillator X1 and a resistor R3 are connected between the XTAL pin and the EXTAL pin of the microcontroller U2. A capacitor C4 is also connected to the XTAL pin of the microcontroller U2, and a capacitor C5 is also connected to the EXTAL pin of the microcontroller U2. The other ends of the capacitors C4 and C5 are grounded.

[0009] Preferably, the detection pins of the main control module include IN0-IN10 pins, which are respectively connected to different gear contacts in the band switch. The microcontroller U2 detects the current gear of the band switch based on the change in the level of the detection pins.

[0010] Preferably, the RC circuit of the input module includes a pull-up resistor and a capacitor to ground connected in parallel. The pull-up resistor and the capacitor to ground form a low-pass filter to filter out high-frequency interference and improve signal stability.

[0011] Preferably, the CANTX and CANRX pins of the microcontroller U2 are connected to the TXD and RXD pins of the communication chip U5, and the CANH and CANL pins of the communication chip U5 are connected to the generator.

[0012] Preferably, a resistor R6 and a diode U6 are connected between the CANH pin and the CANL pin of the communication chip U5, respectively, and capacitors C10 and C11 are connected in parallel between the VCC pin and the GND pin of the communication chip U5.

[0013] Preferably, it also includes a power supply module, which includes a voltage regulator chip U3, a diode D1, and a diode U4. The VIN pin of the voltage regulator chip U3 is connected to the input voltage through the parallel diodes D1 and U4, and the VOUT pin of the voltage regulator chip U3 is used for output voltage.

[0014] Preferably, the VIN pin of the voltage regulator chip U3 is also connected to capacitors C1 and C2 in parallel, and the other ends of capacitors C1 and C2 are grounded; the VOUT pin of the voltage regulator chip U3 is connected to capacitors C3, C7, C8 and C9 in parallel, and the other ends of capacitors C3, C7, C8 and C9 are grounded.

[0015] Preferably, both the band switch and the circuit board are installed in a protective housing. The protective housing is equipped with a knob connected to the band switch and a wiring harness connected to the circuit board. The knob is used to adjust the band switch position, and the other end of the wiring harness is connected to the engine via a plug.

[0016] The beneficial effects of this utility model are as follows: The power mode selection switch, by setting a microcontroller U2 in the circuit board, reads the input pins (IN0~IN10) of the current band switch common terminal through the GPIO port of the microcontroller U2, realizes logic recognition inside the microcontroller U2, and encapsulates the gear information into a data frame conforming to the CAN protocol format. It is then output to the CAN bus through the integrated communication chip U5, realizing standardized digital communication, which facilitates linkage control with the engine management system, reduces the number of wiring harnesses, improves wiring simplicity and maintenance convenience, and is compatible with the vehicle control system.

[0017] Furthermore, by setting a filter network at the connection between the circuit board and the band switch through the input module, the signal of each position of the band switch is effectively filtered to suppress high-frequency jitter and spike interference, ensuring that the input signal is clean and stable, and the circuit board can accurately determine the position of the knob. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the principle of this utility model;

[0020] Figure 2 This is the circuit diagram of the main control module of this utility model;

[0021] Figure 3 This is a circuit diagram of the input module of this utility model;

[0022] Figure 4 This is a circuit diagram of the communication module of this utility model;

[0023] Figure 5 This is the circuit diagram of the power supply module of this utility model;

[0024] Figure 6 This is a schematic diagram of the structure of this utility model.

[0025] Reference numerals: 1. Knob; 2. Protective casing; 3. Wiring harness; 4. Plug-in. Detailed Implementation

[0026] Example 1

[0027] like Figure 1 As shown, a power mode selection switch includes a band switch and a circuit board. The circuit board receives the gear position signal from the band switch and transmits it to the engine. The engine collects the gear position information of the band switch according to the communication protocol to output the corresponding power.

[0028] The circuit board includes a main control module, a power supply module, an input module, and a communication module. The main control module is connected to the power supply module, the input module, and the communication module, respectively.

[0029] like Figure 2 As shown, the main control module includes a microcontroller U2. The NRST pin of the microcontroller U2 is connected to a parallel resistor R4 and a capacitor C6. The other end of the resistor R4 is connected to the output terminal of the power supply module, and the other end of the capacitor C6 is grounded to achieve power-on reset.

[0030] A crystal oscillator X1 and a resistor R3 are connected between the XTAL and EXTAL pins of microcontroller U2. A capacitor C4 is also connected to the XTAL pin of microcontroller U2, and a capacitor C5 is connected to the EXTAL pin. The other ends of capacitors C4 and C5 are grounded. Crystal X1 provides the clock signal to microcontroller U2, resistor R3 acts as a feedback resistor, and capacitors C4 and C5 act as load capacitors to stabilize the oscillation.

[0031] The SWCK and SWIO pins of the microcontroller U2 are connected to connector H13 to facilitate the debugging of the microcontroller U2.

[0032] The microcontroller U2 also includes IN0-IN10 pins, which are connected to different range contacts in the band switch, respectively, to detect the current range of the band switch based on changes in the pin level.

[0033] like Figure 3 As shown, the microcontroller U2 is connected to the band switch via an input module. The input module includes multiple RC circuits, each consisting of a pull-up resistor and a capacitor to ground connected in parallel. The pull-up resistor and the capacitor to ground form a low-pass filter to filter out high-frequency interference on the signal line and improve the stability of the input signal.

[0034] The main control module is connected to the communication module, and signal conversion is achieved through the communication module. For example... Figure 2 , Figure 4 As shown, the communication module includes a communication chip U5. The CANTX and CANRX pins of the microcontroller U2 are connected to the TXD and RXD pins of the communication chip U5. The CANH and CANL pins of the communication chip U5 are connected to the generator, enabling data exchange between the microcontroller U2 and the generator. Furthermore, a resistor R6 and a diode U6 are connected between the CANH and CANL pins of the communication chip U5, respectively, for protection and to improve communication reliability. Additionally, capacitors C10 and C11 are connected in parallel between the VCC and GND pins of the communication chip U5 for power supply filtering and to suppress voltage ripple.

[0035] like Figure 5As shown, the power supply module is connected to the main control module and is used to convert the input voltage into a stable voltage required by the main control module. The power supply module includes a voltage regulator chip U3, diode D1, and diode U4.

[0036] The VIN pin of the voltage regulator chip U3 is connected to the input voltage through diodes D1 and U4 connected in parallel. Diode D1 is used for reverse connection protection, and diode U4 is used for surge protection, thus providing protection. The VIN pin of the voltage regulator chip U3 is also connected to capacitors C1 and C2 connected in parallel. The other ends of capacitors C1 and C2 are grounded. Capacitors C1 and C2 act as decoupling capacitors to filter out input voltage ripple.

[0037] The VOUT pin of the voltage regulator chip U3 is used for output voltage. A series of capacitors C3, C7, C8, and C9 are connected in parallel to the VOUT pin of the voltage regulator chip U3. The other ends of capacitors C3, C7, C8, and C9 are all grounded. Capacitors C3, C7, C8, and C9 are used for filtering to ensure that the output voltage is stable and ripple-free.

[0038] like Figure 1 As shown, the band switch in this embodiment is a rotary type, specifically including 11 positions. Figure 6 As shown, the band switch and circuit board are installed inside the protective housing 2. The protective housing 2 is equipped with a knob 1 connected to the band switch and a wiring harness 3 connected to the circuit board. The knob 1 is used to adjust the band switch position. The other end of the wiring harness 3 is connected to the engine through a plug 4. The engine power selection is realized through the power mode selection switch.

[0039] Working principle: The power mode selection switch selects the gear by rotating the band switch. After the band switch is turned on, the microcontroller U2 on the circuit board detects the level change of the IN0-IN10 pins to obtain the current gear information of the band switch. Then, through the cooperation between the microcontroller U2 and the communication chip U5, the bus data is converted and sent to the generator. After the generator parses the data, it outputs the corresponding power, thus realizing the selection of the power mode.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power mode selection switch for selecting engine power, characterized in that, It includes a band switch and a circuit board. The circuit board receives the gear position signal from the band switch and transmits it to the engine. The engine collects the gear position information of the band switch according to the communication protocol to output corresponding power. The circuit board includes a main control module, an input module, and a communication module. The detection pin of the main control module is connected to the range contacts of the band switch. An input module is connected between the main control module and the band switch. The input module includes multiple RC circuits. The main control module is connected to the engine through a communication module, which includes a communication chip U5 for signal transmission and conversion between the main control module and the generator.

2. The power mode selection switch according to claim 1, characterized in that, The main control module includes a microcontroller U2. The NRST pin of the microcontroller U2 is connected to a resistor R4 and a capacitor C6 in parallel. The other end of the resistor R4 is connected to the output terminal of the power supply module, and the other end of the capacitor C6 is grounded.

3. The power mode selection switch according to claim 2, characterized in that, A crystal oscillator X1 and a resistor R3 are connected between the XTAL pin and the EXTAL pin of the microcontroller U2. A capacitor C4 is also connected to the XTAL pin of the microcontroller U2, and a capacitor C5 is also connected to the EXTAL pin of the microcontroller U2. The other ends of the capacitors C4 and C5 are grounded.

4. The power mode selection switch according to claim 2, characterized in that, The main control module's detection pins include IN0-IN10 pins, which are respectively connected to different gear contacts in the band switch. The microcontroller U2 detects the current gear of the band switch based on the change in the level of the detection pins.

5. The power mode selection switch according to claim 1, characterized in that, The RC circuit of the input module includes a pull-up resistor and a capacitor to ground connected in parallel. The pull-up resistor and the capacitor to ground form a low-pass filter to filter out high-frequency interference and improve signal stability.

6. The power mode selection switch according to claim 2, characterized in that, The CANTX and CANRX pins of the microcontroller U2 are connected to the TXD and RXD pins of the communication chip U5, and the CANH and CANL pins of the communication chip U5 are connected to the generator.

7. The power mode selection switch according to claim 6, characterized in that, A resistor R6 and a diode U6 are connected between the CANH pin and the CANL pin of the communication chip U5, respectively. A capacitor C10 and a capacitor C11 are connected in parallel between the VCC pin and the GND pin of the communication chip U5.

8. The power mode selection switch according to claim 1, characterized in that, It also includes a power supply module, which includes a voltage regulator chip U3, a diode D1, and a diode U4. The VIN pin of the voltage regulator chip U3 is connected to the input voltage through the parallel diodes D1 and U4, and the VOUT pin of the voltage regulator chip U3 is used for output voltage.

9. The power mode selection switch according to claim 8, characterized in that, The VIN pin of the voltage regulator chip U3 is also connected to capacitors C1 and C2 in parallel, and the other ends of capacitors C1 and C2 are grounded; the VOUT pin of the voltage regulator chip U3 is connected to capacitors C3, C7, C8 and C9 in parallel, and the other ends of capacitors C3, C7, C8 and C9 are grounded.

10. The power mode selection switch according to claim 1, characterized in that, The band switch and the circuit board are both installed in the protective housing (2). The protective housing (2) is equipped with a knob (1) connected to the band switch and a wiring harness (3) connected to the circuit board. The knob (1) is used to adjust the band switch position. The other end of the wiring harness (3) is connected to the engine through a plug (4).

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