An electric control system and method for a door lock

Abstract

The application discloses an electric control system and method of a door lock, and belongs to the technical field of the door lock. The electric control system comprises a shell arranged on a vehicle body or a vehicle door and an electric control system arranged in the shell. A rotating lock tongue and a stop pawl are rotationally connected in the shell. A lock hole for clamping a lock post is arranged on the rotating lock tongue. The stop pawl can be clamped at a position corresponding to the lock hole of the rotating lock tongue. A locking channel for the lock post to enter is arranged at a position close to the lock post of the shell. The stop pawl is connected with an elastic assembly for driving the stop pawl to rotate. The stop pawl abuts against the rotating lock tongue under the power of the elastic assembly. The electric control system comprises a general control circuit, a switching circuit and a driving circuit. The general control circuit comprises a power-on judgment module and a half-lock starting module. The application has the effect that the rotating lock tongue can be precisely and automatically attracted in a narrow space.

Description

Technical Field

[0001] This invention relates to the field of vehicle door locks, and in particular to an electronic control system and method for a door lock. Background Technology

[0002] When a car door closes, the door lock engages with the car's locking pillar, thus locking the door shut. Currently, car doors are in a partially locked state when closed. To automatically transition from a partially locked to a fully locked state, numerous complex components such as sensors, switches, and actuators are used, increasing the door's thickness, occupying significant space, severely impacting vehicle assembly speed, and wasting energy. For existing self-closing door locks, adding a push-receiving part to the rotary latch connected to the housing increases the radius of the corresponding push-receiving part and the area along the latch's rotation path. This requires increasing the distance between the push rod body, stop pawl, and other components within the housing and the rotary latch's axis to avoid interfering with its rotation. However, this results in a less compact component distribution and increased overall size, negatively impacting the ease of installation and versatility of the self-closing door lock.

[0003] The prior art can be referenced in Chinese invention patent application publication number CN104389467B, which discloses an adaptive contact-type closing control system for automobile doors, including a first pressure sensing unit, an acceleration sensing unit, a data receiving unit, a data comparison and judgment unit, a preset data input unit, a command output unit, and a door command action execution unit. The door lock between the door and the corresponding door frame is an electronically controlled latch unit. The system designs data transmission between each unit module, compares and judges the data sensed by the pressure sensing unit and the acceleration sensing unit, perceives the door closing action, and uses the door command action execution unit to perform the closing operation on the door according to the preset working execution power, so that the door closes at a moderate speed. At the same time, the door lock is designed as an electronically controlled latch unit, introducing an electronically controlled contact-type closing method.

[0004] The existing technical solutions mentioned above have the following drawbacks: When the car's self-closing door lock automatically resets in a half-locked state, due to the limited space, a self-closing door lock with a smaller structure and more precise closing effect is required. Summary of the Invention

[0005] In order to achieve precise automatic locking of door locks in confined spaces, this application provides an electronic control system and method for door locks.

[0006] On the one hand, the electronic control system for a door lock provided in this application adopts the following technical solution: An electronic control system for a door lock includes a housing mounted on a vehicle body or door and an electronic control system mounted inside the housing. A rotary latch and a stop pawl are rotatably connected inside the housing. The rotary latch has a locking slot for a locking pin to engage. The stop pawl can engage with the rotary latch at a position corresponding to the locking slot. A locking channel for the locking pin to enter is provided near the locking pin in the housing. The stop pawl is connected to an elastic component that pushes the stop pawl to rotate. The stop pawl abuts against the rotary latch under the power of the elastic component. The housing is rotatably connected to a push-receiving part. One end of the push-receiving part is rotatably connected to a push rod body, and the other end of the push-receiving part is connected to a drive assembly for pushing the push-receiving part to rotate. The push rod body can abut against the rotary lock tongue. The push rod body is slidably connected to the housing. The push rod body slides towards or away from the rotary lock tongue. When the drive assembly pushes the push-receiving part to rotate, causing the push rod body to slide towards the rotary lock tongue and the stop pawl to engage with the lock mouth, the push rod body pushes the rotary lock tongue to rotate until the lock pin is engaged in the lock mouth and the stop pawl is separated from the lock mouth. When the lock pin is engaged in the lock mouth and the stop pawl is separated from the lock mouth, the push rod body cannot abut against the rotary lock tongue. The electronic control system includes a main control circuit, a switching circuit, and a drive circuit. The main control circuit includes a power-on judgment module and a semi-lock start module. The switching circuit detects the state of the stop pawl. When the stop pawl moves from outside the lock opening to the lock opening, and when the stop pawl moves from the lock opening to outside the lock opening, the signal input module transmits a contact signal to the half-lock start module. After receiving the start signal, the drive circuit controls the drive component to push the pushed part to rotate, causing the push rod body to move towards the rotating lock tongue until it reaches its limit and then returns. The power-on judgment module determines whether the door lock is in an unlocked state or a fully locked state after the electronic control system is powered on. If it is in an unlocked state, it transmits an unlocking signal to the half-lock activation module. After receiving the unlocking signal, the semi-lock starting module waits to receive the contact signal. After receiving the contact signal for the first time, the semi-lock starting module transmits a start signal to the drive circuit. After receiving the contact signal for the second time, the semi-lock starting module determines that the door lock is in a fully locked state. After receiving the contact signal for the fourth time, the semi-lock starting module resets the contact signal count.

[0007] By adopting the above solution, the door lock structure is simple and occupies little space. The electronic control system automatically judges the door lock status and triggers self-locking according to the door lock's actions, ensuring precise self-locking control. Self-locking only occurs when the door needs to be partially locked.

[0008] Preferably, the switching circuit includes a micro switch fixedly connected to the lower part of the corresponding stop claw on the housing. When the stop claw is engaged with the lock, the stop claw releases the micro switch, and the micro switch outputs a contact signal.

[0009] By adopting the above scheme, when the rotary lock tongue rotates, it will drive the stop pawl to rotate. The position of the stop pawl is detected by a micro switch. During the process of the door lock switching from the unlocked state to the half-locked state and from the half-locked state to the unlocked state, the stop pawl will trigger the micro switch once. After determining the initial state of the door lock, the current door lock state can be determined by counting the number of times the micro switch is triggered.

[0010] Preferably, the drive assembly includes a drive torsion spring fixedly connected to the push part, the other end of the drive torsion spring fixedly connected to the housing, when the push part rotates in the forward direction, the push rod body moves towards the rotating lock tongue, the drive torsion spring gives the push part a force to rotate in the reverse direction, a spring pull wire is fixedly connected to one end of the push part away from the push rod body, the other end of the spring pull wire is fixedly connected to a winch, the spring pull wire is wound on the winch, the winch is fixedly connected to a motor, when the motor drives the winch to rotate, the spring pull wire gives the push part a force to rotate in the forward direction; After receiving the start signal, the drive circuit controls the motor to start. When the motor reaches the end of its stroke, the motor reverses until it is reset.

[0011] By adopting the above scheme, when the motor drives the winch turntable, the spring cable will pull the pushed part to rotate, causing the push rod body to move closer to the rotating lock tongue. When the motor does not apply force to the pushed part, the drive torsion spring will drive the pushed part to reset, allowing the push rod body to move away from the rotating lock tongue.

[0012] Preferably, the electronic control system further includes a motor detection circuit, and the main control circuit further includes a stroke determination module; The motor detection circuit detects the motor's current value after the motor starts and transmits the current value to the stroke determination module. The stroke determination module is set with a limit current value. When the received current value reaches the limit current value, it determines that the motor has reached the limit stroke and transmits a reset signal to the drive circuit. After receiving the reset signal, the drive circuit controls the motor to reverse until it is reset.

[0013] By adopting the above solution, it is possible to determine whether the motor output shaft has reached its limit stroke by detecting the motor current, which helps the motor to reset and avoids the motor from maintaining its limit stroke for a long time, thus affecting the motor's lifespan.

[0014] Preferably, the electronic control system further includes a power supply circuit and a power supply sampling circuit; The power supply circuit is used to supply power to the electronic control system; The power supply sampling circuit detects the power supply voltage of the power supply circuit and transmits it to the power-on judgment module; The power-on judgment module is preset with a low voltage setting value. When the power supply voltage is higher than the low voltage setting value, the power-on judgment module determines that the electronic control system is powered on.

[0015] By adopting the above scheme, when the power supply circuit starts to supply power, the power supply voltage is higher than the low voltage setting value, and the electronic control system will determine that the power is on, thus avoiding the power-on determination being triggered by a weak current.

[0016] Preferably, the electronic control system further includes a Hall circuit; The Hall circuit includes a Hall switch for detecting whether the motor exceeds its limit stroke. When the Hall switch detects that the motor has exceeded its limit stroke, it transmits a response signal to the power-on judgment module. The power-on judgment module determines that after the electronic control system is powered on, if it receives a response signal, it transmits a start signal to the drive circuit; if it receives a response signal after outputting the start signal, it transmits an unlock signal to the half-lock start module.

[0017] By adopting the above scheme, the Hall switch has high sensitivity and can accurately detect whether the motor has exceeded its limit stroke.

[0018] Preferably, the Hall switch is mounted on the housing or winch, and a magnet is fixedly connected to the winch or housing. When the locking pin and the stop pawl are both separated from the locking jaws, and the motor exceeds its limit stroke, the Hall switch senses the magnet and outputs a response signal to the power-on judgment module.

[0019] By adopting the above scheme, the Hall switch can detect the magnetic field, and the magnet can change the magnetic field. When the motor exceeds its limit stroke, the magnet just moves in front of the Hall switch, and the Hall switch detects the magnet and sends a response signal.

[0020] Preferably, the main control circuit includes chip U4; the electronic control system includes an interference isolation module, which includes an inductor L4 mounted on the circuit board. The power supply circuit includes a primary filter module connected to the power supply Vp. The primary filter module outputs two paths: one path passes through rectifier diode D2 and is output to the motor module; the other path passes through rectifier diode D6 and then through a multi-frequency filter module to output voltage VCC. Voltage VCC is connected to the transformer module to output a working voltage of 3.3V. The primary filtering module includes capacitors C1, C2, and C4 connected in parallel; The multi-frequency filtering module includes capacitors C9, C11, C13, C14, C16, C17, and C18 connected in parallel. The transformer module includes a voltage regulator U7; VCC is filtered by parallel capacitors C3 and C6 and then enters voltage regulator U7. Voltage regulator U7 is filtered and rectified by inductor L2 and parallel capacitors C12 and C15, and then outputs a working voltage of 3.3V. The drive circuit includes chip U5. In chip U5, pins 1 and 2 are connected to the output terminal of chip U4 to receive the start signal and are connected to the motor input terminal through the output terminals outa and outb. Pin 4 is connected to the voltage Vd filtered by parallel capacitors C20 and C21. The CS terminal of pin 3 is grounded through the sampling resistor R12. The power supply sampling circuit includes resistor R5, capacitor C19 and inductor L3. After the voltage VCC passes through the voltage divider resistor R5, it outputs an electrical signal Vpsample to chip U4 through the filter and rectified capacitor C19 and inductor L3. The motor detection circuit includes chip U3. In chip U3, the CS terminal is connected to pin 1 through a rectifier and filter module composed of inductor L6 and capacitor C22. The operating voltage of pin 5 is 3.3V. Pin 4 outputs the sampling current MSMP to chip U4 through voltage divider resistor R19. The switching circuit includes a normally open response switch S2 that is normally closed. One end of the response switch S2 is grounded and the other end is connected to the BG channel. The NIT0 of the chip U4 is connected to the BGI channel through the diode D5. The BGI channel is connected to the chip U4. The BGI channel is connected to the BG channel through the resistor R11 and grounded through the reverse diode D4. The electronic control system also has a door handle signal, which includes a resistor R15 connected to chip U4. The door handle signal enters chip U4 through resistor R15. The Hall circuit includes a chip U1 for acquiring Hall element signals and a Hall wake-up module. The Hall wake-up module uses a control circuit for two-stage MOSFETs Q4 and Q1. Chip U4 outputs Hallpwctr to the drain (D) terminal of the excitation MOSFET Q4, the source (S) terminal is grounded, and the gate (G) terminal is connected to 3.3V through a pull-down resistor R13. The gate (G) terminal of the excitation MOSFET Q4 is connected to the drain (D) terminal of the control MOSFET Q1, the source (S) terminal of the control MOSFET Q1 is connected to 3.3V, the gate (G) terminal of the control MOSFET Q1 is connected to the VCC terminal of chip U1, and the Vout terminal of chip U1 is connected to pin 7 of chip U4.

[0021] By adopting the above scheme, multiple filtering and voltage regulation circuits can make the control of the electronic control system more accurate.

[0022] On the other hand, the electronic control method for a door lock provided in this application adopts the following technical solution: An electronic control method for a door lock includes the following steps: Determine if the electronic control system is powered on; If powered on, the system will be reset. Determine whether the door lock is in the unlocked or fully locked state; If the door lock is in the unlocked state, count the number of times the contact signal is received; If a contact signal is received once, the control drive component pushes the push rod body; If two contact signals are received, the door lock is determined to be in a fully locked state. If the contact signal is received four times, the contact signal count will be reset.

[0023] By adopting the above scheme, the initial state of the door lock is determined when the power is turned on, and the self-locking is triggered according to the action of the door lock, ensuring precise self-locking control, and self-locking is only performed when the door needs to be partially locked.

[0024] Preferably, the steps for determining whether the electronic control system is powered on include: The power supply voltage of the power supply circuit is detected. If the power supply voltage is higher than the low voltage setting value, it is determined that the electronic control system is powered on. The steps to determine whether a door lock is in the unlocked or fully locked state include: The control drive component extends the push rod body; If the push rod body exceeds its limit travel and a response signal is received, it is determined that the door lock is in the unlocked state. If the push rod body does not exceed its limit travel, the door lock is determined to be in a fully locked state.

[0025] By adopting the above scheme, the power supply voltage can be compared with the low voltage setting value to accurately determine whether the electronic control system is powered on. If the push rod body reaches its limit stroke, that is, the push rod body abuts against the rotating bolt, the door lock is definitely in the fully locked state. If the push rod body exceeds its limit stroke, that is, the push rod body moves to its limit but does not contact the rotating bolt, the door lock is definitely in the unlocked state. The judgment is accurate and the detection is simple.

[0026] In summary, the present invention has the following beneficial effects: 1. It eliminates a lot of hardware, transforming hardware control into software control, optimizing power consumption algorithms and control, reducing unnecessary power consumption, and in particular, transforming traditional multi-point location acquisition into the acquisition of electrical signal changes in a single module, combined with time control, thereby simplifying the circuit, saving power, and compressing the space occupied by the circuit and supporting components. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0028] Figure 2 This is an exploded view of the internal structure of the casing in Embodiment 1 of this application.

[0029] Figure 3 This is a partial schematic diagram of the driving component in Embodiment 1 of this application.

[0030] Figure 4 This is a system block diagram of the electronic control system in Embodiment 1 of this application.

[0031] Figure 5This is a block diagram of the main control circuit in Embodiment 1 of this application.

[0032] Figure 6 This is a circuit diagram of the main control circuit in Embodiment 1 of this application.

[0033] Figure 7 This is a circuit diagram of the driving circuit in Embodiment 1 of this application.

[0034] Figure 8 This is a circuit diagram of the power supply sampling circuit in Embodiment 1 of this application.

[0035] Figure 9 This is a circuit diagram of the switching circuit in Embodiment 1 of this application.

[0036] Explanation of reference numerals in the attached figures: 1. Housing; 11. Rotary locking tongue; 111. Locking jaw; 12. Stop pawl; 13. Locking channel; 14. Elastic component; 141. Elastic torsion spring; 15. Pushing part; 151. Push rod body; 16. Drive component; 161. Drive torsion spring; 162. Spring cable; 163. Winch; 164. Motor; 165. Magnet; 2. Electrical control system; 21. Main control circuit; 211. Power-on judgment module; 212. Half-lock start module; 213. Travel judgment module; 22. Switching circuit; 221. Micro switch; 23. Drive circuit; 24. Motor detection circuit; 25. Power supply circuit; 26. Power supply sampling circuit; 27. Hall circuit; 271. Hall switch. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0038] Example 1: This application discloses an electronic control system for a door lock, such as... Figure 1 and Figure 2 As shown, the device includes a housing 1 mounted on the vehicle body or door. A rotary latch 11 and a stop pawl 12 are rotatably connected within the housing 1. The rotary latch 11 has a locking slot 111 for the locking pin to engage, and the stop pawl 12 can engage with the rotary latch 11 at the corresponding locking slot 111. A locking channel 13 is provided near the locking pin in the housing 1 for the locking pin to enter. The stop pawl 12 is connected to an elastic component 14, which includes an elastic torsion spring 141 fixedly connected to the stop pawl 12. Under the power of the elastic component 14, the stop pawl 12 abuts against the rotary latch 11.

[0039] like Figure 1 and Figure 2 As shown, a micro switch 221 is fixedly connected below the stop claw 12 on the housing 1. When the stop claw 12 is engaged with the lock 111, the stop claw 12 releases the micro switch 221. At other times, the stop claw 12 presses against the micro switch 221.

[0040] like Figure 1 and Figure 3 As shown, a pusher 15 is rotatably connected to the housing 1. One end of the pusher 15 is rotatably connected to a push rod body 151, and the other end of the pusher 15 is connected to a drive assembly 16. The drive assembly 16 includes a drive torsion spring 161 fixedly connected to the pusher 15. The other end of the drive torsion spring 161 is fixedly connected to the housing 1. When the pusher 15 rotates in the forward direction, the push rod body 151 moves towards the rotary locking tongue 11, and the drive torsion spring 161 gives the pusher 15 a force to rotate in the reverse direction. A spring cable 162 is fixedly connected to one end of the pusher 15 away from the push rod body 151, and the other end of the spring cable 162 is fixedly connected to a winch 163. The spring cable 162 is wound around the winch 163, and the winch 163 is fixedly connected to a motor 164. When the motor 164 drives the winch 163 to rotate, the spring cable 162 gives the pusher 15 a force to rotate in the forward direction. The push rod body 151 can abut against the rotating latch 11. The push rod body 151 is slidably connected to the housing 1. The push rod body 151 slides towards or away from the rotating latch 11. When the drive assembly 16 pushes the pushed part 15 to rotate, causing the push rod body 151 to slide closer to the rotating latch 11 and the stop pawl 12 to engage with the lock mouth 111, the push rod body 151 pushes the rotating latch 11 to rotate until the lock pin is engaged in the lock mouth 111 and the stop pawl 12 is separated from the lock mouth 111. When the lock pin is engaged in the lock mouth 111 and the stop pawl 12 is separated from the lock mouth 111, the push rod body 151 can no longer abut against the rotating latch 11.

[0041] like Figure 4 and Figure 5 As shown, the electronic control system 2 includes a main control circuit 21, a switching circuit 22, a motor 164 detection circuit, a power supply circuit 25, a power supply sampling circuit 26, and a Hall effect circuit 27. The main control circuit 21 includes a power-on judgment module 211, a semi-lock start module 212, and a travel judgment module 213.

[0042] like Figure 4 and Figure 5 As shown, the power supply circuit 25 supplies power to the electronic control system 2. The power supply sampling circuit 26 detects the power supply voltage of the power supply circuit 25 and transmits it to the power-on judgment module 211.

[0043] like Figure 3 and Figure 4 As shown, a Hall switch 271 is installed on the housing 1, and a magnet 165 is fixedly connected to the winch 163. When the locking pin and the stop pawl 12 are both separated from the locking jaw 111, and the motor 164 exceeds its limit stroke, the Hall switch 271 senses the magnet 165. The Hall circuit 27 is connected to the Hall switch 271, and when the Hall switch 271 senses the magnet 165, it outputs a response signal to the power-on judgment module 211.

[0044] like Figure 4 and Figure 5 As shown, the power-on judgment module 211 has a preset low voltage setting value. When the power supply voltage is higher than the low voltage setting value, the power-on judgment module 211 judges that the electronic control system 2 is powered on and waits to receive a response signal. If a response signal is received, an unlocking signal is transmitted to the semi-lock start module 212.

[0045] like Figure 4 and Figure 5 As shown, the switch circuit 22 is connected to the micro switch 221. When the stop claw 12 releases the micro switch 221, the micro switch 221 outputs a contact signal, and the switch circuit 22 transmits the contact signal to the semi-lock start module 212.

[0046] like Figure 4 and Figure 5 As shown, after receiving the unlocking signal, the half-lock starting module 212 waits to receive a contact signal. After receiving the contact signal for the first time, the half-lock starting module 212 transmits a start signal to the drive circuit 23. After receiving the contact signal for the second time, the half-lock starting module 212 determines that the door lock is in a fully locked state. After receiving the contact signal for the fourth time, the half-lock starting module 212 resets the contact signal count. When the rotary latch 11 rotates, it drives the stop pawl 12 to rotate. The position of the stop pawl 12 is detected by the micro switch 221. During the process of the door lock switching from the unlocked state to the half-locked state and from the half-locked state to the unlocked state, the stop pawl 12 will trigger the micro switch 221 once. After determining the initial state of the door lock, the current door lock state can be determined by counting the number of times the micro switch 221 is triggered.

[0047] like Figure 4 and Figure 5 As shown, after receiving the start signal, the drive circuit 23 controls the drive assembly 16 to push the pushed part 15 to rotate, causing the push rod body 151 to move closer to the rotating locking tongue 11. When the motor 164 starts, the detection circuit detects the current value of the motor 164 and transmits it to the stroke judgment module 213. The stroke judgment module 213 has a set limit current value. When the received current value reaches the limit current value, it determines that the motor 164 has reached its limit stroke and transmits a reset signal to the drive circuit 23. After receiving the reset signal, the drive circuit 23 controls the motor 164 to reverse until it resets. By detecting the current of the motor 164, it is possible to determine whether the output shaft of the motor 164 has reached its limit stroke, helping the motor 164 to reset and preventing the motor 164 from maintaining its limit stroke for a long time, which would affect the lifespan of the motor 164.

[0048] like Figure 6As shown, the main control circuit 21 includes chip U4. The electronic control system 2 includes an interference isolation module, which includes inductor L4 mounted on the circuit board. The power supply circuit 25 includes a primary filter module connected to the power supply Vp. The primary filter module outputs two paths: one path passes through rectifier diode D2 and is output to the motor 164 module; the other path passes through rectifier diode D6 and then through a multi-frequency filter module to output voltage VCC. Voltage VCC is then connected to the transformer module to output a working voltage of 3.3V. The primary filter module includes capacitors C1, C2, and C4 connected in parallel. The multi-frequency filter module includes capacitors C9, C11, C13, C14, C16, C17, and C18 connected in parallel. The transformer module includes a voltage regulator U7. VCC is filtered by parallel capacitors C3 and C6 and then enters the voltage regulator U7. The voltage regulator U7 is filtered and rectified by inductor L2 and parallel capacitors C12 and C15 to output a working voltage of 3.3V, thus ensuring signal accuracy.

[0049] like Figure 7 As shown, the drive circuit 23 includes chip U5. In chip U5, pins 1 and 2 are connected to the output terminal of chip U4 to receive the start signal, and are connected to the input terminal of motor 164 through output terminals outa and outb. Pin 4 is connected to the voltage Vd filtered by parallel capacitors C20 and C21, and the CS terminal of pin 3 is grounded through sampling resistor R12. Hall circuit 27 includes chip U1 for acquiring Hall element signals and Hall wake-up module. Hall wake-up module adopts the control circuit of two-stage MOSFETs Q4 and Q1. Chip U4 outputs Hallpwctr to the D terminal of the excitation MOSFET Q4, the S terminal is grounded, and the G terminal is connected to 3.3V through pull-down resistor R13. The G terminal of the excitation MOSFET Q4 is connected to the D terminal of the control MOSFET Q1. The S terminal of the control MOSFET Q1 is connected to 3.3V, and the G terminal of the control MOSFET Q1 is connected to the VCC terminal of chip U1. The Vout terminal of chip U1 is connected to pin 7 of chip U4. The Hall circuit 27 uses two-stage control, which ensures that the control MOSFET Q1 is completely disconnected when it is in the off state, thus avoiding the drawback of interference from small currents.

[0050] like Figure 8 As shown, the power supply sampling circuit 26 includes a resistor R5, a capacitor C19, and an inductor L3. The voltage VCC, after passing through the voltage divider resistor R5, is filtered and rectified by the capacitor C19 and inductor L3, outputting an electrical signal Vpsample to the chip U4. The motor 164 detection circuit includes a chip U3. In chip U3, the CS terminal is connected to pin 1 through a rectifier and filter module composed of inductor L6 and capacitor C22. Pin 5 operates at 3.3V, and pin 4 outputs a sampling current MSMP to chip U4 through the voltage divider resistor R19.

[0051] like Figure 9As shown, the switching circuit 22 includes a normally open but normally closed response switch S2. One end of the response switch S2 is grounded and the other end is connected to the BG channel. The NIT0 of the chip U4 is connected to the BGI channel through diode D5. The BGI channel is connected to the chip U4 and is connected to the BG channel through resistor R11 and grounded through a reverse-connected diode D4. The electronic control system 2 also has a door handle signal. The door handle signal includes a resistor R15 connected to the chip U4. The door handle signal enters the chip U4 through resistor R15.

[0052] The implementation principle of the door lock electronic control system in this application embodiment is as follows: The door lock structure of this solution is simple, occupies little space, saves a lot of hardware, changes hardware control to software control, optimizes power consumption algorithm and control, reduces useless power consumption, especially changing the traditional multi-point position acquisition to the acquisition of electrical signal change of a single module, combined with time control, thereby simplifying the circuit, saving power, and compressing the space occupied by the circuit and supporting components.

[0053] Example 2: This application discloses an electronic control method for a door lock, the specific steps of which are as follows: S100. Determine if the electronic control system 2 is powered on. Detect the power supply voltage of the power supply circuit 25. If the power supply voltage is higher than the low voltage setting value, then determine that the electronic control system 2 is powered on.

[0054] S200, if powered on, reset the system.

[0055] S201. If no power is applied, no reaction will occur.

[0056] S300: Determine whether the door lock is in the unlocked or fully locked state.

[0057] S301, the control drive assembly 16 extends the push rod body 151.

[0058] S302. If the push rod body 151 exceeds the limit stroke, i.e., a response signal is received, it is determined that the door lock is in the unlocked state.

[0059] S303. If the push rod body 151 does not exceed the limit stroke, the door lock is determined to be in the fully locked state.

[0060] S400 If the door lock is in the unlocked state, count the number of times the contact signal is received.

[0061] S500 If a contact signal is received once, the control drive assembly 16 pushes the push rod body 151.

[0062] S501. If two contact signals are received, it is determined that the door lock is in a fully locked state.

[0063] S502. If the contact signal is received four times, the count of received contact signals is reset.

[0064] S600 If the door lock is in a fully locked state, wait for two contact signals to be received before determining that the door lock is in a half-locked state.

[0065] S700 If the door lock changes directly from the unlocked state to the fully locked state, the motor 164 is directly controlled to reset.

[0066] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An electric control system of a door lock, comprising a casing (1) provided on a vehicle body or a vehicle door and an electric control system (2) provided in the casing (1), characterized in that: The housing (1) is rotatably connected to a rotary latch (11) and a stop pawl (12). The rotary latch (11) has a locking slot (111) for the locking pin to engage. The stop pawl (12) can engage with the rotary latch (11) at the corresponding locking slot (111). The housing (1) has a locking channel (13) for the locking pin to enter near the locking pin. The stop pawl (12) is connected to an elastic component (14) that pushes the stop pawl (12) to rotate. The stop pawl (12) abuts against the rotary latch (11) under the power of the elastic component (14). The housing (1) is rotatably connected to a push-receiving part (15). One end of the push-receiving part (15) is rotatably connected to a push rod body (151), and the other end of the push-receiving part (15) is connected to a drive assembly (16) for pushing the push-receiving part (15) to rotate. The push rod body (151) can abut against the rotating latch (11). The push rod body (151) is slidably connected to the housing (1). The push rod body (151) slides in the direction of approaching or moving away from the rotating latch (11). When the drive assembly (16) pushes the push-receiving part (15) to rotate, the push rod body (151) can abut against the rotating latch (11). When the pusher (15) rotates and the push rod body (151) slides close to the rotating bolt (11) and the stop pawl (12) engages with the lock mouth (111), the push rod body (151) pushes the rotating bolt (11) to rotate until the lock pin engages with the lock mouth (111) and the stop pawl (12) separates from the lock mouth (111). When the lock pin engages with the lock mouth (111) and the stop pawl (12) separates from the lock mouth (111), the push rod body (151) cannot abut against the rotating bolt (11). The electronic control system (2) includes a main control circuit (21), a switching circuit (22) and a drive circuit (23). The main control circuit (21) includes a power-on judgment module (211) and a half-lock start module (212). The switching circuit (22) detects the state of the stop pawl (12). When the stop pawl (12) moves from outside the lock opening (111) to the lock opening (111), and when the stop pawl (12) moves from the lock opening (111) to outside the lock opening (111), the signal input module transmits a contact signal to the half-lock start module (212). After receiving the start signal, the drive circuit (23) controls the drive assembly (16) to push the pushed part (15) to rotate, causing the push rod body (151) to move towards the rotating lock tongue (11) until it reaches the limit and then returns. The power-on judgment module (211) determines whether the door lock is in an unlocked state or a fully locked state after the electronic control system (2) is powered on. If it is in an unlocked state, it transmits an unlocking signal to the half-lock start module (212). After receiving the unlocking signal, the half-lock start module (212) waits to receive the contact signal. After receiving the contact signal for the first time, the half-lock start module (212) transmits the start signal to the drive circuit (23). After receiving the contact signal for the second time, the half-lock start module (212) determines that the door lock is in the fully locked state. After receiving the contact signal for the fourth time, the half-lock start module (212) resets the count of receiving contact signals. The electronic control system (2) also includes a Hall circuit (27); The Hall circuit (27) includes a Hall switch (271) for detecting whether the motor (164) exceeds its limit stroke. When the Hall switch (271) detects that the motor (164) exceeds its limit stroke, it transmits a response signal to the power-on judgment module (211). The power-on judgment module (211) judges that after the power-on of the electronic control system (2), if a response signal is received, it transmits a start signal to the drive circuit (23); if a response signal is received after the start signal is output, it transmits an unlock signal to the half-lock start module (212). Hall switch (271) is installed on housing (1) or winch (163). Magnet (165) is fixedly connected to winch (163) or housing (1). When the locking pin and stop pawl (12) are separated from the lock (111) and the motor (164) exceeds the limit stroke, Hall switch (271) senses magnet (165) and outputs response signal to power-on judgment module (211).

2. The electronic control system for a door lock according to claim 1, characterized in that: The switching circuit (22) includes a micro switch (221) fixedly connected to the bottom of the corresponding stop claw (12) of the housing (1). When the stop claw (12) is engaged with the lock (111), the stop claw (12) releases the micro switch (221), and the micro switch (221) outputs a contact signal.

3. The electronic control system for a door lock according to claim 1, characterized in that: The drive assembly (16) includes a drive torsion spring (161) fixedly connected to the push part (15). The other end of the drive torsion spring (161) is fixedly connected to the housing (1). When the push part (15) rotates in the forward direction, the push rod body (151) moves towards the rotating lock tongue (11). The drive torsion spring (161) gives the push part (15) a force to rotate in the reverse direction. A spring pull wire (162) is fixedly connected to one end of the push part (15) away from the push rod body (151). The other end of the spring pull wire (162) is fixedly connected to a winch (163). The spring pull wire (162) is wound around the winch (163). A motor (164) is fixedly connected to the winch (163). When the motor (164) drives the winch (163) to rotate, the spring pull wire (162) gives the push part (15) a force to rotate in the forward direction. After receiving the start signal, the drive circuit (23) controls the motor (164) to start. When the motor (164) reaches the end of its stroke, the motor (164) reverses until it is reset.

4. The electronic control system for a door lock according to claim 3, characterized in that: The electronic control system (2) also includes a motor (164) detection circuit, and the main control circuit (21) also includes a stroke judgment module (213); The motor (164) detection circuit detects the current value of the motor (164) after the motor (164) is started and transmits the current value to the stroke judgment module (213); The stroke judgment module (213) is set with a limit current value. When the received current value reaches the limit current value, it is determined that the motor (164) has reached the limit stroke and a reset signal is transmitted to the drive circuit (23). After receiving the reset signal, the drive circuit (23) controls the motor (164) to reverse until it is reset.

5. The electronic control system for a door lock according to claim 4, characterized in that: The electronic control system (2) also includes a power supply circuit (25) and a power supply sampling circuit (26); The power supply circuit (25) is used to supply power to the electronic control system (2); The power supply sampling circuit (26) detects the power supply voltage of the power supply circuit (25) and transmits it to the power-on judgment module (211); The power-on judgment module (211) has a preset low voltage setting value. When the power supply voltage is higher than the low voltage setting value, the power-on judgment module (211) judges that the power control system (2) is powered on.

6. The electronic control system for a door lock according to claim 5, characterized in that: The main control circuit (21) includes chip U4; the electronic control system (2) includes an interference isolation module, which includes an inductor L4 mounted on the circuit board; The power supply circuit (25) includes a first-stage filter module connected to the power supply Vp. The first-stage filter module outputs two paths. One path is output to the motor (164) module through the rectifier diode D2, and the other path is output to the multi-frequency filter module after passing through the rectifier diode D6. The voltage VCC is connected to the transformer module and outputs a working voltage of 3.3V. The primary filtering module includes capacitors C1, C2, and C4 connected in parallel; The multi-frequency filtering module includes capacitors C9, C11, C13, C14, C16, C17, and C18 connected in parallel. The transformer module includes a voltage regulator U7; VCC is filtered by parallel capacitors C3 and C6 and then enters voltage regulator U7. Voltage regulator U7 is filtered and rectified by inductor L2 and parallel capacitors C12 and C15, and then outputs a working voltage of 3.3V. The drive circuit (23) includes chip U5. In chip U5, pins 1 and 2 are connected to the output terminal of chip U4 to receive the start signal and are connected to the input terminal of motor (164) through the output terminals outa and b. Pin 4 is connected to the voltage Vd filtered by parallel capacitors C20 and C21, and the CS terminal of pin 3 is grounded through the sampling resistor R12. The power supply sampling circuit (26) includes resistor R5, capacitor C19 and inductor L3. After the voltage VCC passes through the voltage divider resistor R5, it outputs an electrical signal Vpsample to chip U4 through the filter and rectified capacitor C19 and inductor L3. The motor (164) detection circuit includes chip U3. In chip U3, the CS terminal is connected to pin 1 through a rectifier and filter module composed of inductor L6 and capacitor C22. The working voltage of pin 5 is 3.3V. Pin 4 outputs the sampling current MSMP to chip U4 through voltage divider resistor R19. The switching circuit (22) includes a normally open response switch S2 that is normally closed. One end of the response switch S2 is grounded and the other end is connected to the BG channel. The NIT0 of the chip U4 is connected to the BGI channel through the diode D5. The BGI channel is connected to the chip U4. The BGI channel is connected to the BG channel through the resistor R11 and grounded through the reverse diode D4. The electronic control system (2) is also connected to the door handle signal. The door handle signal includes the resistor R15 connected to the chip U4. The door handle signal enters the chip U4 through the resistor R15. The Hall circuit (27) includes a chip U1 for acquiring Hall element signals and a Hall wake-up module. The Hall wake-up module uses a control circuit of two-stage MOSFETs Q4 and Q1. Chip U4 outputs Hallpwctr to the D terminal of the excitation MOSFET Q4. The S terminal is grounded, and the G terminal is connected to 3.3V through a pull-down resistor R13. The G terminal of the excitation MOSFET Q4 is connected to the D terminal of the control MOSFET Q1. The S terminal of the control MOSFET Q1 is connected to 3.3V. The G terminal of the control MOSFET Q1 is connected to the VCC terminal of chip U1. The Vout terminal of chip U1 is connected to pin 7 of chip U4.

7. An electronic control method for a door lock, using the electronic control system for the door lock as described in any one of claims 1-6, characterized in that, Includes the following steps: Determine whether the electronic control system (2) is powered on; If powered on, the system will be reset. Determine whether the door lock is in the unlocked or fully locked state; If the door lock is in the unlocked state, count the number of times the contact signal is received; If a contact signal is received once, the control drive assembly (16) pushes the push rod body (151); If two contact signals are received, the door lock is determined to be in a fully locked state. If the contact signal is received four times, the contact signal count will be reset.

8. The electronic control method for a door lock according to claim 7, characterized in that: The steps to determine whether the electronic control system (2) is powered on include: The power supply voltage of the power supply circuit (25) is detected. If the power supply voltage is higher than the low voltage setting value, it is determined that the electronic control system (2) is powered on. The steps to determine whether a door lock is in the unlocked or fully locked state include: The control drive assembly (16) extends the push rod body (151); If the push rod body (151) exceeds the limit stroke, that is, if a response signal is received, it is determined that the door lock is in the unlocked state; If the push rod body (151) does not exceed the limit stroke, the door lock is determined to be in the fully locked state.

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