Electric door lock with weak current starting and mechanical starting functions for electric vehicle

Abstract

An electric door lock with weak current starting and mechanical starting functions for an electric vehicle comprises a mechanical lock body part and an MCU electric control part, the mechanical lock body part comprises a lock shell, a lock cylinder, a lock cylinder sleeve, an electromagnetic controller, a knob switch, a microswitch and an ignition switch, and the ignition switch is provided with a physical connection contact and a non-physical connection contact which are used for achieving power-on and power-off control. The MCU electric control part comprises an MCU chip for transmitting, receiving and processing signals, an electronic switch and an LED indicating element, the MCU chip is electrically connected with the electronic switch, and the electronic switch controls a non-physical connection contact of the ignition switch; the novel electric door lock is developed, the electric door lock has the functions of weak current starting and mechanical starting, the actual use requirement is met, weak current starting of the electric door lock through control over an electronic switch serves as a main unlocking mode, the service life of the electric door lock can be prolonged, meanwhile, safety in the use process is guaranteed, and the electric door lock is suitable for popularization and application. And the use is more convenient.

Description

Technical Field

[0001] The invention relates to an electric door lock for an electric vehicle with both weak-electric starting and mechanical starting functions. Background Art

[0002] The electric door lock of an electric vehicle is an opening and closing device for powering on and off. Existing electric door locks all use the contact and separation of mechanical contacts to achieve on-off control of the battery power supply circuit. The battery voltage is 48~72V. During the contact process, the contacts will produce a certain arc discharge due to the large current, which is easy to cause loss at the contact position and even the possibility of safety accidents.

[0003] An ignition switch lock capable of keyless start and key start, disclosed in publication number CN108198723B, is an example of prior art that can be used as a reference. Summary of the invention

[0004] In view of the shortcomings existing in the above problems, the present invention provides an electric door lock for an electric vehicle having both weak-electric starting and mechanical starting functions.

[0005] To achieve the above object, the present invention provides an electric door lock for an electric vehicle with both weak-current starting and mechanical starting functions, comprising a mechanical lock body part and an MCU electric control part; Among them, the mechanical lock body part includes a lock shell, a lock core, a lock core sleeve, an electromagnetic controller, a knob switch, a micro switch, and an ignition switch. The lock core can be rotatably built into the lock shell, and the lock core is covered with a lock core sleeve on the outside. The electromagnetic controller is arranged on the lock shell for locking and unlocking the lock core sleeve. The knob switch is linked to the lock core, and the ignition switch has physical connection contacts and non-physical connection contacts for realizing power-on and power-off control. When the knob switch is pressed, the lock core and the lock core sleeve can move axially and trigger the micro switch. When the appropriate key is not inserted, the blade built into the lock core is stuck in the card slot of the lock core sleeve, and the lock core cannot rotate relative to the lock core sleeve. When the electromagnetic controller releases the lock of the lock core sleeve, the lock core and the lock core sleeve can rotate synchronously. When the appropriate key is inserted into the lock core through the knob switch, the lock core can rotate relative to the lock core sleeve. During the rotation and switching process of the lock core, the physical connection contacts of the ignition switch can be contacted or separated. The MCU electronic control part includes an MCU chip for signal reception and processing, an electronic switch, and an LED indicator element. The MCU chip is externally connected to a first detection circuit for identifying whether the knob switch is at the start position or the OFF position, and a second detection circuit for identifying whether the micro switch is triggered. The MCU chip is powered by a step-down power supply circuit. The MCU chip forms interactive communication with the vehicle's central control instrument through a signal transmission circuit. The MCU chip is also electrically connected to the electronic switch and the electronic switch controls the non-physical connection contacts of the ignition switch. The MCU chip is also externally connected to an output feedback circuit to receive the on-off status of the non-physical connection contacts of the ignition switch in real time. The LED indicator element is used to receive signals from the MCU chip and provide status indications.

[0006] Furthermore, the first detection circuit is composed of a resistor R3, a resistor R6, and a voltage regulator diode ZD1. The first detection circuit has a VOUT1 connection terminal, a GND grounding terminal, and a VOUT1-C connection terminal. The VOUT1-C connection terminal is connected to pin 4 of the MCU chip. When the knob switch is turned to the start position, the physical connection contact of the ignition switch is connected, and the VOUT1 connection terminal inputs the position signal of the knob switch to the MCU chip via the VOUT1-C connection terminal.

[0007] Furthermore, the second detection circuit is composed of a resistor R4, a resistor R7, and a voltage regulator ZD2. The second detection circuit has a VDD connection terminal, a GND ground terminal, and a VDD-C connection terminal. The VDD-C connection terminal is connected to pin 8 of the MCU chip. When the microswitch is triggered, the VDD connection terminal is connected, and the VDD connection terminal inputs the trigger signal of the microswitch to the MCU chip via the VDD-C connection terminal.

[0008] Furthermore, the step-down power supply circuit is composed of a resistor R9, a diode D2, a voltage regulator ZD4, and a capacitor C1. The step-down power supply circuit has a VCC connection terminal, a 5V connection terminal, and a GND ground terminal. The VCC connection terminal is connected to the input of the battery, and the 5V connection terminal is connected to pin 1 of the MCU chip.

[0009] Furthermore, the signal transmission circuit includes resistor R12, resistor R14, resistor R15, resistor R17, capacitor C2, and transistor Q3. The signal transmission circuit has a VCC connection terminal, a GND grounding terminal, a one-line signal interaction terminal, a PC1 connection terminal, and a PC0 connection terminal. The one-line signal interaction terminal is connected to the central control instrument through a one-line communication protocol, the PC1 connection terminal is connected to pin 2 of the MCU chip, and the PC0 connection terminal is connected to pin 3 of the MCU chip.

[0010] Furthermore, the electronic switch is composed of a resistor R10, a resistor R11, a resistor R13, a resistor R16, a MOS tube Q1, a triode Q2, a voltage regulator ZD5, a diode D1, and a diode D3. The electronic switch has a VCC connection terminal, a VOUT2 connection terminal, a GND grounding terminal, and a KEY1 connection terminal. The KEY1 connection terminal is connected to pin 14 of the MCU chip. When the MCU chip outputs a signal to connect the VCC connection terminal and the VOUT2 connection terminal at the two poles of the control MOS tube Q1, the non-physical connection contact of the ignition switch is connected.

[0011] Furthermore, the output feedback circuit is composed of a resistor R5, a resistor R8, and a voltage regulator ZD3. The output feedback circuit has a VOUT2 connection terminal, a VOUT2-C connection terminal, and a GND ground terminal. The VOUT2-C port is connected to pin 5 of the MCU chip.

[0012] The beneficial effects of the present invention compared to the prior art are: The plan has developed a new type of electric door lock, which has both low-voltage starting and mechanical starting functions to meet the needs of actual use; the electric door lock will realize low-voltage starting as the main unlocking method through the control of the electronic switch, which can extend the service life of the electric door lock, while ensuring safety during use and being more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a connection diagram of the MCU chip involved; Figure 2 is a connection diagram of a first detection circuit involved; Figure 3 is a connection diagram of a second detection circuit involved; Figure 4 It is a connection diagram of the step-down power supply circuit involved; Figure 5 is a connection diagram of the signal transmission circuit involved; Figure 6 is a connection diagram of the electronic switch involved; Figure 7 is a connection diagram of the output feedback circuit involved; Figure 8 Schematic diagram of the LED indicator element involved. DETAILED DESCRIPTION

[0014] An electric door lock for an electric vehicle with both weak-current starting and mechanical starting functions according to an embodiment of the present invention comprises a mechanical lock body part and an MCU electric control part; Among them, the mechanical lock body part includes a lock shell, a lock core, a lock core sleeve, an electromagnetic controller, a knob switch, a micro switch, and an ignition switch. The lock core can be rotatably built into the lock shell, and the lock core is covered with a lock core sleeve on the outside. The electromagnetic controller is arranged on the lock shell for locking and unlocking the lock core sleeve. The knob switch is linked to the lock core, and the ignition switch has physical connection contacts and non-physical connection contacts for realizing power-on and power-off control. When the knob switch is pressed, the lock core and the lock core sleeve can move axially and trigger the micro switch. When the appropriate key is not inserted, the blade built into the lock core is stuck in the card slot of the lock core sleeve, and the lock core cannot rotate relative to the lock core sleeve. When the electromagnetic controller releases the lock of the lock core sleeve, the lock core and the lock core sleeve can rotate synchronously. When the appropriate key is inserted into the lock core through the knob switch, the lock core can rotate relative to the lock core sleeve. During the rotation and switching process of the lock core, the physical connection contacts of the ignition switch can be contacted or separated. The MCU electronic control part includes an MCU chip for signal reception and processing, an electronic switch, and an LED indicator element. The MCU chip is externally connected to a first detection circuit for identifying whether the knob switch is at the start position or the OFF position, and a second detection circuit for identifying whether the micro switch is triggered. The MCU chip is powered by a step-down power supply circuit. The MCU chip forms interactive communication with the vehicle's central control instrument through a signal transmission circuit. The MCU chip is also electrically connected to the electronic switch and the electronic switch controls the non-physical connection contacts of the ignition switch. The MCU chip is also externally connected to an output feedback circuit to receive the on-off status of the non-physical connection contacts of the ignition switch in real time. LED indicator components are used to receive signals from the MCU chip and make status indications, such as Figure 1 , Figure 8 As shown, the LED indicator element includes LED1 and LED2, LED1 is connected to pin 6 of the MCU chip, and LED2 is connected to pin 7 of the MCU chip; like Figure 1 , Figure 2 As shown, the first detection circuit is composed of a resistor R3, a resistor R6, and a voltage regulator ZD1. The first detection circuit has a VOUT1 connection terminal, a GND ground terminal, and a VOUT1-C connection terminal. The VOUT1-C connection terminal is connected to pin 4 of the MCU chip. When the knob switch is turned to the start position, the physical connection contact of the ignition switch is connected, and the VOUT1 connection terminal inputs the position signal of the knob switch to the MCU chip through the VOUT1-C connection terminal; like Figure 1 , Figure 3As shown, the second detection circuit is composed of a resistor R4, a resistor R7, and a voltage regulator ZD2. The second detection circuit has a VDD connection terminal, a GND ground terminal, and a VDD-C connection terminal. The VDD-C connection terminal is connected to pin 8 of the MCU chip. When the micro switch is triggered, the VDD connection terminal is connected, and the VDD connection terminal inputs the trigger signal of the micro switch to the MCU chip through the VDD-C connection terminal. like Figure 1 , Figure 4 As shown, the step-down power supply circuit is composed of a resistor R9, a diode D2, a voltage regulator ZD4, and a capacitor C1. The step-down power supply circuit has a VCC connection terminal, a 5V connection terminal, and a GND ground terminal. The VCC connection terminal is connected to the input of the battery, and the 5V connection terminal is connected to pin 1 of the MCU chip. like Figure 1 , Figure 5 As shown, the signal transmission circuit includes a resistor R12, a resistor R14, a resistor R15, a resistor R17, a capacitor C2, and a transistor Q3. The signal transmission circuit has a VCC connection terminal, a GND ground terminal, a one-line signal interaction terminal, a PC1 connection terminal, and a PC0 connection terminal. The one-line signal interaction terminal is connected to the central control instrument through a one-line communication protocol (the central control instrument has a Bluetooth function that can identify the owner's approach), the PC1 connection terminal is connected to pin 2 of the MCU chip, and the PC0 connection terminal is connected to pin 3 of the MCU chip; like Figure 1 , Figure 6 As shown, the electronic switch is composed of a resistor R10, a resistor R11, a resistor R13, a resistor R16, a MOS tube Q1, a triode Q2, a voltage regulator ZD5, a diode D1, and a diode D3. The electronic switch has a VCC connection terminal, a VOUT2 connection terminal, a GND ground terminal, and a KEY1 connection terminal. The KEY1 connection terminal is connected to the pin 14 of the MCU chip. When the MCU chip outputs a signal to connect the VCC connection terminal and the VOUT2 connection terminal of the two poles of the control MOS tube Q1, the non-physical connection contact of the ignition switch is connected. like Figure 1 , Figure 7 As shown, the output feedback circuit is composed of a resistor R5, a resistor R8, and a voltage regulator ZD3. The output feedback circuit has a VOUT2 connection terminal, a VOUT2-C connection terminal, and a GND ground terminal. The VOUT2-C port is connected to pin 5 of the MCU chip. like Figure 1 , Figure 8As shown, the LED indicating element includes LED1 and LED2. Both LED1 and LED2 are powered by a 5V connection terminal. After passing through a series resistor R1, LED1 is electrically connected to pin 6 of the MCU chip. After passing through a series resistor R2, LED1 is electrically connected to pin 7 of the MCU chip. The functions of the two lamp beads LED1 and LED2 are the same, that is, the state changes of the two lamp beads LED1 and LED2 that play an indicating role are collectively referred to as LEDs or LED lamps.

[0015] The plan has developed a new type of electric door lock, which has both low-voltage starting and mechanical starting functions to meet the needs of actual use; the electric door lock will realize low-voltage starting as the main unlocking method through the control of the electronic switch, which can extend the service life of the electric door lock, while ensuring safety during use and being more convenient to use.

[0016] In order to facilitate the understanding of the present invention, the following description is given in conjunction with the accompanying drawings during specific use; There are several ways to unlock the electric door lock of the electric vehicle: ① When there is no Bluetooth signal, insert the adapted key into the lock cylinder through the knob switch and turn the lock cylinder. The knob switch rotates with the lock cylinder and switches to the open position. The physical connection contacts of the ignition switch come into contact, and the VCC connection terminal and the VOUT1 connection terminal are connected. At this time, the LED light is always on; ② When the central control instrument recognizes that the owner is approaching and realizes Bluetooth connection, the central control instrument sends the signal to the MCU chip through the signal transmission circuit. The MCU chip makes the LED in a breathing state. By pressing the knob switch for a long time, the micro switch is triggered (default is more than 1.5 seconds). The MCU chip uses an electronic switch to control the non-physical connection contacts of the ignition switch, that is, the VCC connection end and the VOUT2 connection end of the two poles of the MOS tube Q1 are connected. In the on state, the LED is long on.

[0017] ③ When the central control instrument recognizes that the owner is approaching and realizes Bluetooth connection, the central control instrument sends the signal to the MCU chip through the signal transmission circuit. The MCU chip makes the LED in a breathing state. By short-pressing the knob switch, the micro switch is triggered (within 1.5 seconds by default). The MCU chip enables the electromagnetic controller to unlock the lock cylinder sleeve. At this time, the LED light is flashing. Turn the knob switch to the open position, the lock cylinder and lock cylinder sleeve rotate synchronously, the physical connection contacts of the ignition switch come into contact, the VCC connection end and the VOUT1 connection end are connected, and the LED light is long on.

[0018] At the same time, the MCU chip can identify whether the VOUT2 connection terminal is connected. When ② is realized, if ① or ③ is still operated to make the physical connection contacts of the ignition switch come into contact, the MCU chip immediately controls the VCC connection terminal and the VOUT2 connection terminal to be disconnected.

[0019] The value of the above operation ② is that weak current control is realized through the MCU chip (the short connection between the VOUT2 connection terminal and the VCC connection is controlled by whether the MOS tube Q1 is turned on, and the starting current of the MOS tube Q1 is extremely small), which effectively reduces the ignition phenomenon of the physical connection contacts caused by operations ①③; the electric door lock has three unlocking methods, and the second unlocking method is used as the most important unlocking method, which can effectively reduce the use of the physical connection contacts of the ignition switch.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric door lock for an electric vehicle with both weak current starting and mechanical starting functions, characterized in that: Including mechanical lock body part and MCU electronic control part; Among them, the mechanical lock body part includes a lock shell, a lock core, a lock core sleeve, an electromagnetic controller, a knob switch, a micro switch, and an ignition switch. The lock core can be rotatably built into the lock shell, and the lock core is covered with a lock core sleeve on the outside. The electromagnetic controller is arranged on the lock shell for locking and unlocking the lock core sleeve. The knob switch is linked to the lock core, and the ignition switch has physical connection contacts and non-physical connection contacts for realizing power-on and power-off control. When the knob switch is pressed, the lock core and the lock core sleeve can move axially and trigger the micro switch. When the appropriate key is not inserted, the blade built into the lock core is stuck in the card slot of the lock core sleeve, and the lock core cannot rotate relative to the lock core sleeve. When the electromagnetic controller releases the lock of the lock core sleeve, the lock core and the lock core sleeve can rotate synchronously. When the appropriate key is inserted into the lock core through the knob switch, the lock core can rotate relative to the lock core sleeve. During the rotation and switching process of the lock core, the physical connection contacts of the ignition switch can be contacted or separated. The MCU electronic control part includes an MCU chip for signal reception and processing, an electronic switch, and an LED indicator element. The MCU chip is externally connected to a first detection circuit for identifying whether the knob switch is at the start position or the OFF position, and a second detection circuit for identifying whether the micro switch is triggered. The MCU chip is powered by a step-down power supply circuit. The MCU chip forms interactive communication with the vehicle's central control instrument through a signal transmission circuit. The MCU chip is also electrically connected to the electronic switch and the electronic switch controls the non-physical connection contacts of the ignition switch. The MCU chip is also externally connected to an output feedback circuit to receive the on-off status of the non-physical connection contacts of the ignition switch in real time. The LED indicator element is used to receive signals from the MCU chip and provide status indications.

2. The electric door lock for electric vehicles with both weak current starting and mechanical starting functions according to claim 1, characterized in that: The first detection circuit is composed of a resistor R3, a resistor R6, and a voltage regulator ZD1. The first detection circuit has a VOUT1 connection terminal, a GND ground terminal, and a VOUT1-C connection terminal. The VOUT1-C connection terminal is connected to pin 4 of the MCU chip. When the knob switch is turned to the start position, the physical connection contact of the ignition switch is connected, and the VOUT1 connection terminal inputs the position signal of the knob switch to the MCU chip via the VOUT1-C connection terminal.

3. The electric door lock for electric vehicles with both weak current starting and mechanical starting functions according to claim 2, characterized in that: The second detection circuit is composed of a resistor R4, a resistor R7, and a voltage regulator ZD2. The second detection circuit has a VDD connection terminal, a GND ground terminal, and a VDD-C connection terminal. The VDD-C connection terminal is connected to pin 8 of the MCU chip. When the micro switch is triggered, the VDD connection terminal is connected, and the VDD connection terminal inputs the trigger signal of the micro switch to the MCU chip through the VDD-C connection terminal.

4. The electric door lock for electric vehicles with both weak current starting and mechanical starting functions according to claim 3, characterized in that: The step-down power supply circuit is composed of a resistor R9, a diode D2, a voltage regulator ZD4, and a capacitor C1. The step-down power supply circuit has a VCC connection terminal, a 5V connection terminal, and a GND ground terminal. The VCC connection terminal is connected to the input of the battery, and the 5V connection terminal is connected to pin 1 of the MCU chip.

5. The electric door lock for electric vehicles with both weak current starting and mechanical starting functions according to claim 4, characterized in that: The signal transmission circuit includes resistor R12, resistor R14, resistor R15, resistor R17, capacitor C2, and transistor Q3. The signal transmission circuit has a VCC connection terminal, a GND grounding terminal, a one-line signal interaction terminal, a PC1 connection terminal, and a PC0 connection terminal. The one-line signal interaction terminal is connected to the central control instrument through a one-line communication protocol, the PC1 connection terminal is connected to pin 2 of the MCU chip, and the PC0 connection terminal is connected to pin 3 of the MCU chip.

6. The electric door lock for electric vehicles with both weak current starting and mechanical starting functions according to claim 5, characterized in that: The electronic switch is composed of a resistor R10, a resistor R11, a resistor R13, a resistor R16, a MOS tube Q1, a triode Q2, a voltage regulator ZD5, a diode D1, and a diode D3. The electronic switch has a VCC connection terminal, a VOUT2 connection terminal, a GND grounding terminal, and a KEY1 connection terminal. The KEY1 connection terminal is connected to pin 14 of the MCU chip. When the MCU chip outputs a signal to connect the VCC connection terminal and the VOUT2 connection terminal at the two poles of the control MOS tube Q1, the non-physical connection contact of the ignition switch is connected.

7. The electric door lock for electric vehicles with both weak current starting and mechanical starting functions according to claim 6, characterized in that: The output feedback circuit is composed of a resistor R5, a resistor R8, and a voltage regulator ZD3. The output feedback circuit has a VOUT2 connection terminal, a VOUT2-C connection terminal, and a GND ground terminal. The VOUT2-C port is connected to pin 5 of the MCU chip.

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