Emergency unlocking device and automobile

Abstract

The utility model discloses an emergency unlocking device and car relates to equipment unlocking field, when the door lock control module's door lock power is normal, first switch cut -off, the connecting structure in linkage mechanism is disconnected, and the lock cylinder and operating device between target door lock are disconnected, when this target door lock only receives the control of door lock control module, when the door lock power is abnormal and power off, first switch will be under the action of the standby power supply of energy storage capacitor and conduct, thereby control connecting structure closes, make linkage structure can realize the physical connection between operating device and the lock cylinder of target door lock through the closed connecting structure, when this can realize the unlocking of target door lock under the emergency state through operating device. The energy required for driving connecting structure is relatively small, therefore energy storage capacitor can adopt small capacity capacitor, realizes the cost lower, and can avoid the interference of energy storage capacitor to door lock control module when the door lock power is normal, guarantees the reliability of door lock control module.

Description

Technical Field

[0001] This utility model relates to the field of device unlocking, and in particular to an emergency unlocking device and a car. Background Technology

[0002] As automobiles continue to develop, users' demands for vehicle safety are also increasing. Currently, car door locks consist of two locks. The first lock connects to the outer door handle, ensuring the door cannot be opened by pushing it open after it's manually closed. However, this first lock can be unlocked using the outer door handle. Therefore, for added safety, a second lock is installed. This second lock is controlled by a door lock control module. When the second lock is engaged, the door cannot be opened simply by the outer door handle. It requires unlocking the second lock from inside the vehicle using the door lock control module, and then unlocking the first lock using the outer door handle to fully unlock the door. In the event of a collision or rollover, occupants may find it difficult to operate the door lock control module to unlock the second lock. Furthermore, the accident may damage the car battery that powers the door lock control module, or damage related power wiring, causing a loss of power and preventing the second lock from being unlocked. This makes it difficult for outsiders to open the door simply by using the outer door handle, hindering external rescue efforts. Utility Model Content

[0003] The purpose of this utility model is to provide an emergency unlocking device and a car, which aims to solve the problem of emergency unlocking of the second lock of the car door under the control of the door lock control module when the car is involved in a collision or other accident.

[0004] To solve the above-mentioned technical problems, this utility model provides an emergency unlocking device, comprising:

[0005] A linkage mechanism is disposed between an external operating device of the vehicle and the lock cylinder of the target door lock. The linkage mechanism includes a connecting structure, a first end of which is connected to the external operating device of the vehicle, and a second end of which is connected to the lock cylinder of the target door lock. The linkage mechanism is used to connect the operating device and the lock cylinder of the target door lock when the connecting structure is closed.

[0006] The energy storage capacitor, with its first end grounded, is used to output backup power when the door lock control module of the target door lock experiences an abnormal power outage.

[0007] The first switch has its first end connected to the second end of the door lock power supply and the energy storage capacitor, and its second end connected to the control end of the connection structure. The control end is connected to the door lock power supply and is used to control the connection structure to close when the door lock power supply fails due to an abnormal power outage, based on the conduction of the backup power supply.

[0008] Optionally, the control end of the connection structure includes a negative drive end and a positive drive end; the emergency unlocking device further includes:

[0009] The second switch has its first terminal grounded and its control terminal connected to both the door lock power supply and the control terminal of the first switch. It is used to turn on when the door lock power supply is normally powered on, thereby controlling the connection structure to disconnect; and to turn off when the door lock power supply is abnormally powered off.

[0010] The third switch has a first terminal grounded and a second terminal connected to the negative drive terminal of the connection structure, the control terminal of the first switch, the control terminal of the second switch, and the power supply of the door lock. The control terminal is connected to the positive drive terminal of the connection structure, the second terminal of the first switch, and the second terminal of the second switch. It is used to conduct when the first switch is on to control the connection structure to close, and to cut off when the first switch is off.

[0011] Optional, also includes:

[0012] The reset capacitor has its first end connected to the power supply of the door lock and the control terminal of the first switch, and its second end connected to the control terminal of the second switch, the second terminal of the third switch, and the negative drive terminal of the connection structure.

[0013] Optional, also includes:

[0014] The positive terminal of the unidirectional conduction module is connected to the power supply of the door lock and the control terminal of the first switch, and the negative terminal is connected to the first terminal of the first switch and the second terminal of the energy storage capacitor.

[0015] And / or,

[0016] The first resistor has its first end connected to the negative terminal of the unidirectional conduction module, and its second end connected to the first terminal of the first switch and the second terminal of the energy storage capacitor.

[0017] Optional, also includes:

[0018] The second resistor has its first end grounded and connected to the negative terminal of the door lock power supply, and its second end connected to the positive terminal of the door lock power supply, the control terminal of the first switch, and the positive terminal of the unidirectional conduction module, respectively.

[0019] And / or,

[0020] The third resistor has its first end grounded and its second end connected to the second end of the first switch, the second end of the second switch, the positive drive end of the connection structure, and the control end of the third switch.

[0021] Optional, also includes:

[0022] The fourth resistor has its first end connected to the control terminal of the first switch, the negative drive terminal of the connection structure, the second terminal of the third switch, and the power supply of the door lock, respectively, and its second end connected to the control terminal of the second switch.

[0023] And / or,

[0024] The fifth resistor has its first end connected to the positive drive terminal of the connection structure, the second end of the first switch, and the second end of the second switch, respectively, and its second end connected to the control terminal of the third switch.

[0025] Optional, also includes:

[0026] The fourth switch has a control terminal connected to a preset reset signal, a first terminal connected to the negative terminal of the unidirectional conduction module and the first terminal of the first resistor, and a second terminal connected to the control terminal of the second switch. It is used to control the second switch to conduct when it is on, so as to disconnect the connection structure.

[0027] And / or,

[0028] The fifth switch has a control terminal connected to a preset test signal, a first terminal connected to the power supply of the door lock, and a second terminal connected to the positive terminal of the unidirectional conduction module and the control terminal of the first switch, respectively, for controlling the conduction or cutoff based on the preset test signal.

[0029] Optionally, the connection structure is a snap-fit ​​structure, which includes a latch and a locking pin; the linkage mechanism includes:

[0030] Slide rail;

[0031] The drive motor has a negative drive end connected to the second end of the third switch and a positive drive end connected to the second end of the second switch. It is used to rotate in a first direction when the first switch is off and the second switch is on, and to rotate in a second direction when the first switch is on and the third switch is on.

[0032] The crank, with its first end fixed to the drive motor;

[0033] The latch is mounted on the slide rail and connected to an external operating device of the vehicle, and is used to slide along the slide rail when the operating device is activated.

[0034] The locking pin is disposed at the second end of the crank and connected to the lock cylinder of the target door lock. It is used to disengage from the latch by rotating the crank when the drive motor rotates in the first direction, and to engage with the latch by rotating the crank when the drive motor rotates in the second direction.

[0035] Optionally, the linkage mechanism further includes:

[0036] The first transmission mechanism has a first end connected to an external operating device of the vehicle and a second end connected to the latch.

[0037] The second transmission mechanism has a first end connected to the locking pin and a second end connected to the lock cylinder of the target door lock.

[0038] To solve the above-mentioned technical problems, this utility model also provides a car, including an operating device, a target door lock, and an emergency unlocking device as described above. The operating device is disposed on the outside of the car, and the emergency unlocking device is connected to the operating device and the lock cylinder of the target door lock respectively.

[0039] The target door lock is used to lock or unlock the car door under the control of the door lock control module inside the car.

[0040] This application provides an emergency unlocking device, including a linkage mechanism, an energy storage capacitor, and a first switch. When the door lock control module's power supply is normally powered on, the first switch is turned off, the connection structure in the linkage mechanism is disconnected, and the lock cylinder of the target door lock is disconnected from the operating device. At this time, the target door lock is only controlled by the door lock control module. When the door lock power supply fails abnormally, the first switch will be turned on under the action of the backup power provided by the energy storage capacitor, thereby controlling the connection structure to close. This allows the linkage mechanism to achieve a physical connection between the operating device and the lock cylinder of the target door lock through the closed connection structure. At this time, external personnel can unlock the target door lock through the operating device, thus realizing the unlocking of the target door lock in an emergency. Compared with directly driving the target door lock, the energy required to drive the connection structure is relatively small. Therefore, a small-capacity capacitor can be used for the energy storage capacitor, resulting in lower cost. Furthermore, it can avoid interference from the energy storage capacitor to the door lock control module when the door lock power supply is normally powered on, ensuring the reliability of the door lock control module.

[0041] This application also provides a vehicle that has the same beneficial effects as the aforementioned emergency unlocking device. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the prior art and embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 A schematic diagram of the structure of an emergency unlocking device provided by this utility model;

[0044] Figure 2 A schematic diagram of the structure of a car door lock provided by this utility model;

[0045] Figure 3 A circuit structure diagram of an emergency unlocking device provided by this utility model;

[0046] Figure 4 A circuit diagram illustrating the operation of an emergency unlocking device for a door lock when the power supply is normally powered on, provided by this utility model;

[0047] Figure 5 A circuit diagram illustrating the operation of an emergency unlocking device for a door lock in case of abnormal power failure, provided by this utility model;

[0048] Figure 6 A schematic diagram of another emergency unlocking device provided by this utility model;

[0049] Figure 7 A schematic diagram of the structure of an emergency unlocking device supporting a reset function provided by this utility model;

[0050] Figure 8 A circuit diagram illustrating the operation of an emergency unlocking device during a reset operation, provided by this utility model;

[0051] Figure 9 A schematic diagram of the structure of an emergency unlocking device supporting testing functions provided by this utility model;

[0052] Figure 10 A schematic diagram of the linkage mechanism provided by this utility model;

[0053] Figure 11 A schematic diagram of the operation of a linkage mechanism when the connecting structure is disconnected, provided by this utility model;

[0054] Figure 12 A schematic diagram of the closing action of a connection structure provided by this utility model;

[0055] Figure 13 This utility model provides a schematic diagram of the action of a linkage mechanism when the connecting structure is closed. Detailed Implementation

[0056] The core of this utility model is to provide an emergency unlocking device and a car. Compared with directly driving the target door lock, the energy required for the drive connection structure is relatively small. Therefore, the energy storage capacitor can be a small-capacity capacitor, which reduces the cost and avoids interference from the energy storage capacitor to the door lock control module when the door lock power supply is normally powered on, thus ensuring the reliability of the door lock control module.

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0058] See Figure 1 As shown, Figure 1 A schematic diagram of an emergency unlocking device provided by this utility model; VCC represents the door lock power supply; to solve the above technical problems, this utility model provides an emergency unlocking device, comprising:

[0059] The linkage mechanism 3 is disposed between the operating device 1 outside the vehicle and the lock cylinder of the target door lock 2. The linkage mechanism 3 includes a connecting structure 31, the first end of which is connected to the operating device 1 outside the vehicle, and the second end of which is connected to the lock cylinder of the target door lock 2. The linkage mechanism 3 is used to connect the operating device 1 and the lock cylinder of the target door lock 2 when the connecting structure 31 is closed.

[0060] Energy storage capacitor C1, with its first end grounded, is used to output backup power when the door lock control module of target door lock 2 experiences an abnormal power outage.

[0061] The first switch Q1 has its first end connected to the second end of the door lock power supply and the energy storage capacitor C1, respectively, and its second end connected to the control end of the connection structure 31. The control end is connected to the door lock power supply and is used to control the connection structure 31 to close when the door lock power supply fails due to an abnormal power outage, based on the conduction of the backup power supply.

[0062] Understandably, in order to enable emergency unlocking of the door lock in the event of an abnormality in the door lock control module's power supply, this application provides an emergency unlocking device. The emergency unlocking device consists of two parts: an emergency unlocking circuit, which includes an energy storage capacitor C1 and a first switch Q1. When the door lock power supply is normally powered on, the door lock power supply can charge the energy storage capacitor C1, storing energy through the energy storage capacitor C1. When an abnormality occurs, causing an abnormal power outage of the door lock power supply and a loss of power supply to the door lock control module, the door lock control module cannot continue to effectively unlock the target door lock 2. The energy originally stored in the energy storage capacitor C1 can be used as a backup power output for emergency unlocking, ensuring the unlocking of the target door lock 2 in unexpected situations. The other part is the linkage mechanism 3 for unlocking. The linkage mechanism 3 is controlled by the first switch Q1 in the circuit to achieve different operating states. The first switch Q1 is controlled by the door lock power supply and the backup power supply. When the door lock power supply is normally powered on, the first switch Q1 is in the off state, and the connection structure 31 in the linkage mechanism 3 is disconnected, so that the operating device 1 and the target door lock 2 are disconnected, and the lock cylinder of the target door lock 2 will not be affected by the operating device 1. When the door lock power supply is abnormally de-energized, the first switch Q1 is turned on, the connection structure 31 in the linkage mechanism 3 is closed, and the connection between the operating device 1 and the lock cylinder of the target door lock 2 is established, so that the action of the operating device 1 can drive the action of the target door lock 2 through the linkage mechanism 3 to achieve unlocking.

[0063] This application sets up a linkage mechanism 3, which enables the linkage mechanism 3 to establish a connection between the operating device 1 and the target door lock 2 in an emergency under the control of the circuit section, so that external rescuers can open the car door through the operating device 1. In the event of an abnormal power outage, the backup power output from the energy storage capacitor C1 only needs to control the action of the first switch Q1 and drive the connection structure 31 to close. The action of the first switch Q1 and the action of the connection structure will not be affected by resistance, avoiding the resistance that exists when the target door lock 2 is locked or deformed due to collision. It does not require a lot of energy or multiple attempts to unlock to control the action of the first switch Q1 and drive the connection structure 31 to close. Before the connection structure 31 closes, there are no other force points in the linkage structure and there is no response resistance. Therefore, the connection structure 31 can be controlled by a small amount of electrical energy. For example, when the connection structure 31 is driven to close by a motor, a very small motor can be used to drive the action of the connection structure 31. Compared with directly using the backup power to unlock the target door lock 2, this reduces the energy that the energy storage capacitor C1 needs to store, reduces the implementation cost of the energy storage capacitor C1, and avoids the situation where the door cannot be unlocked due to insufficient energy storage. The circuit does not directly act on the lock cylinder of the target door lock 2 itself, but establishes a physical connection between the operating device 1 and the lock cylinder of the target door lock 2 through the control connection structure 31. Even if the lock cylinder itself is stuck or has resistance due to deformation, it can be unlocked by applying force to the operating device 1 from the outside. For example, rescuers can unlock the target door lock 2 by pulling the external mechanical door handle with great force, thereby opening the car door. This ensures that the target door lock 2 can be unlocked from the outside through the operating device 1 at a low cost.

[0064] It should be noted that this application does not impose any special limitations on the specific type and implementation method of the target door lock 2. The target door lock 2 can be a car door lock, such as the second lock DL2 of a car, or a door lock in other application scenarios or other types of locks. This application does not impose any special limitations on the specific type and implementation method of the operating device 1. The operating device 1 needs to be set in a different position from the door lock control module of the target door lock 2 so that when the door lock control module cannot unlock the target door lock 2, the target door lock 2 can be unlocked by the emergency unlocking device of this application and the operating device 1 working together. The operating device 1 can be adapted to the actual application scenario of the target door lock 2. As long as it is a device that can move under the action of external force, when the linkage mechanism 3 establishes the connection between the operating device 1 and the lock cylinder of the target door lock 2, the action of the operating device 1 can drive the lock cylinder to move and achieve unlocking. For example, when the target door lock 2 is a car door lock, the door lock control module will be set inside the car and operated by the people inside the car. Correspondingly, the operating device 1 can be a mechanical door handle set outside the car. This application does not impose any special limitations on the specific types and implementation methods of the energy storage capacitor C1 and the first switch Q1. The capacity of the energy storage capacitor C1 can be selected and set according to the specific implementation of the connection structure 31. The first switch Q1 can be implemented using switching devices such as MOS transistors (Metal-Oxide-Semiconductor Field-Effect Transistors). This application does not impose any special limitations on the specific types and implementation methods of the door lock power supply and door lock control module. They can be selected and set according to the actual application of the target door lock 2. For example, when the target door lock 2 is a car door lock, the door lock power supply can be implemented using the car's battery.

[0065] As a specific embodiment, taking the target door lock 2 as the second lock DL2 of a car door as an example, the operating device 1 is implemented using a mechanical door handle on the outside of the car, see [link / reference]. Figure 2 As shown, Figure 2 This utility model provides a structural schematic diagram of a car door lock; the lock cylinder of the first lock DL1 is connected to the mechanical door handle by means of a steel cable, etc., and can be unlocked by directly pulling the mechanical door handle; the lock cylinder of the second lock DL2 is normally controlled by the door lock control module, which is equipped with a coil 41. Whether the coil 41 is energized or not is controlled by the occupants of the vehicle by operating the door lock control module. When the coil 41 is energized, it drives the lock cylinder to move, thereby unlocking the second lock DL2; this application adds a feature such as... between the mechanical door handle on the outside of the car and the lock cylinder of the second lock DL2. Figure 2As shown in the linkage mechanism 3, under normal circumstances, the connecting structure 31 is disconnected, and the mechanical door handle and the lock cylinder of the second lock DL2 are not physically connected. At this time, when the second lock DL2 is locked, the outer door handle cannot open the car door. When the door lock power supply is abnormal, the connecting structure 31 is closed, and the mechanical door handle and the lock cylinder of the second lock DL2 are physically connected through the linkage mechanism 3. At this time, the outer door handle can unlock the second lock DL2 with the help of the linkage mechanism 3, thereby opening the car door and realizing unlocking in an emergency.

[0066] In the application scenario of automotive door locks, directly unlocking the lock cylinder of the second lock DL2 would require a 12V motor to provide sufficient energy for the lock cylinder's movement, and the backup power supply would also need to provide a relatively large 12V power supply for unlocking. However, this application only requires a small motor, such as a 3V motor, capable of driving the closing of the connection structure 31. Therefore, the energy storage in the emergency unlocking device provided in this application does not need to use a supercapacitor with a very large capacity, thereby reducing the implementation size of the energy storage capacitor C1. This facilitates the integration of the circuit part of the emergency unlocking device into the vehicle's domain controller, reducing hardware and development costs. It also avoids interference to the door lock control module and the motor's interference to the lock cylinder when the energy storage capacitor C1 stores too much energy. The small motor driving the connection structure 31 only operates under abnormal conditions, without affecting the locking and unlocking of the target door lock 2 based on the door lock control module, ensuring the reliability of the entire vehicle control system.

[0067] This application provides an emergency unlocking device that can be applied to car door locks, enabling intelligent car door locks to automatically unlock in the event of an abnormal power outage. Based on the door lock control module, through the design of the emergency unlocking circuit and linkage mechanism 3, when the target door lock 2 loses power and cannot unlock the door normally, the emergency unlocking device can be triggered to unlock the door. Even after a collision or other accident, if the door lock loses power, rescuers can still unlock the door using the external operating device 1, reducing the difficulty of external rescue and increasing the likelihood of occupants being rescued in a major car accident, thus maximizing their safety. The circuit structure is simple and easy to implement, and the energy storage capacitor C1 has low implementation cost and is easy to integrate.

[0068] See Figure 3 As shown, Figure 3 A circuit structure diagram of an emergency unlocking device provided by this utility model; as an optional embodiment, the control terminal of the connection structure 31 includes a negative drive terminal and a positive drive terminal; the emergency unlocking device also includes:

[0069] The second switch Q2 has its first terminal grounded, and its control terminal connected to both the door lock power supply and the control terminal of the first switch Q1. It is used to conduct when the door lock power supply is normally powered on, so as to control the connection structure 31 to disconnect; and to cut off when the door lock power supply is abnormally powered off.

[0070] The third switch Q3 has its first end grounded and its second end connected to the negative drive end of the connection structure 31, the control end of the first switch Q1, the control end of the second switch Q2, and the door lock power supply, respectively. The control end is connected to the positive drive end of the connection structure 31, the second end of the first switch Q1, and the second end of the second switch Q2, respectively. It is used to turn on when the first switch Q1 is on, so as to control the connection structure 31 to close; and to turn off when the first switch Q1 is off.

[0071] It is easy to understand that the connection structure 31 can switch between open and closed states using methods such as motor drive. Therefore, the circuit of the emergency unlocking device needs to provide a complete energy supply loop for the drive motor M1 that drives the connection structure 31 to switch its operating state. Thus, the control end of the connection structure 31 includes a negative drive end and a positive drive end, which are connected to different positions in the circuit to form a complete energy supply loop under the action of the circuit. At this time, the circuit also needs to further set up a second switch Q2 and a third switch Q3 to cooperate with the first switch Q1 to form a complete energy supply loop. The second switch Q2 serves as the negative drive end switch that controls the reset of the linkage mechanism 3 when the door lock power is normally powered on, and the third switch Q3 serves as the positive drive end switch that controls the operation of the connection structure 31 when the door lock power is abnormally de-energized. The first switch Q1 and the second switch Q2 cooperate to realize an energy supply loop in one direction, and the first switch Q1 and the third switch Q3 cooperate to realize an energy supply loop in the other direction. Through the design of the bidirectional energy supply loop, the linkage mechanism can automatically reset after the door lock power is normally powered on. This application does not impose any special restrictions on the specific types and implementation methods of the second switch Q2 and the third switch Q3.

[0072] As a specific embodiment, such as Figure 3 As shown, the first switch Q1 is implemented using a PMOS transistor, while the second switch Q2 and the third switch Q3 are both implemented using NMOS transistors. The door lock power supply uses a low-voltage battery (BAT) from a car. The circuit is connected to the positive and negative drive terminals of the drive motor M1 in the connection structure 31. The drive motor M1 can drive the connection structure 31 to achieve both open and closed operation states through its own rotation. When the door lock power supply is normally powered on, see... Figure 4 As shown, Figure 4This utility model provides a circuit diagram of an emergency unlocking device for a door lock when the power supply is normally powered on. The door lock power supply charges the energy storage capacitor C1 through the unidirectional conduction module D1 and the first resistor R1. At the same time, the gate of the first switch Q1 is directly connected to the door lock power supply. At this time, the gate voltage of the first switch Q1 is higher than the source voltage and is in the cut-off state. Therefore, the current will not flow to the second terminal of the first switch Q1. At this time, the current will flow through the reset capacitor C2 to the gate of the second switch Q2 and the negative drive terminal of the drive motor M1. The second switch Q2 is turned on under the action of the door lock power supply. Therefore, the current will flow in from the negative drive terminal of the drive motor M1 and out from the positive drive terminal, and flow to ground through the turned-on second switch Q2, forming a complete drive circuit. At this time, the drive motor M1 rotates in one direction (e.g., counterclockwise), the connection structure 31 is disconnected, and the reset linkage mechanism 3 is reset.

[0073] On the other hand, see Figure 5 As shown, Figure 5 This utility model provides a circuit diagram of an emergency unlocking device for a door lock when the power supply is abnormally disconnected. When the door lock power supply is disconnected due to an abnormal situation, the electrical energy stored in the energy storage capacitor C1 will form a high potential at the source of the first switch Q1. At the same time, due to the disconnection of the door lock power supply and the pull-down of the second resistor R2, the gate of the first switch Q1 will form a low potential, causing the first switch Q1 to conduct. At this time, the electrical energy stored in the energy storage capacitor C1 flows to the positive drive terminal of the drive motor M1 through the conducting first switch Q1, and at the same time flows to the gate of the third switch Q3 to control the third switch Q3 to conduct. Therefore, the current will flow in from the positive drive terminal of the drive motor M1 and out from the negative drive terminal, and flow to ground through the conducting third switch Q3, forming a complete drive circuit. At this time, the drive motor M1 will rotate in another direction (clockwise direction opposite to counterclockwise), drive connection structure 31 closes, and control linkage mechanism 3 to establish a physical connection between the vehicle exterior door handle and the second lock DL2, so that external rescuers can open the car door from the outside and open the rescue passage.

[0074] Specifically, a second switch Q2 and a third switch Q3 can be added to the circuit section to provide a complete energy supply circuit for the closure of the connecting structure 31 in the linkage mechanism 3, and to support the switching of the action state of the connecting structure 31 under motor drive; the circuit structure is simple, easy to implement, low in cost and easy to integrate.

[0075] As an optional embodiment, it also includes:

[0076] The reset capacitor C2 has its first end connected to the door lock power supply and the control terminal of the first switch Q1, and its second end connected to the control terminal of the second switch Q2, the second terminal of the third switch Q3, and the negative drive terminal of the connection structure 31.

[0077] Understandably, to prevent the second switch Q2 from remaining continuously conducting when the door lock power supply is powered on, a reset capacitor C2 can be added between the control terminal of the second switch Q2 and the door lock power supply. When the door lock power supply is powered on, the reset capacitor C2 charges instantly, connecting the circuit between the door lock power supply and the control terminal of the second switch Q2. This allows the door lock power supply to control the second switch to conduct, driving the connection structure 31 to disconnect and completing the reset of the linkage mechanism. After the door lock power supply has been powered on for a period of time, the reset capacitor C2 reaches a fully charged state. At this point, the charge movement across the reset capacitor C2 essentially disappears, effectively cutting off the circuit between the door lock power supply and the control terminal of the second switch Q2, causing the second switch Q2 to turn off. In other words, at the instant the door lock power supply is powered on, the door lock power supply can control the drive motor M1 to rotate in one direction through the charging reset capacitor C2. After the drive motor M1 rotates for a period of time to complete the reset of the linkage mechanism, the second switch Q2 switches back to the off state under the action of the reset capacitor C2, preventing the drive motor M1 from rotating continuously. This application does not specifically limit the specific type or implementation method of the reset capacitor C2.

[0078] Specifically, a reset capacitor C2 can be added to the circuit section to help reset the linkage mechanism, and the capacitance characteristics of the reset capacitor C2 can be used to prevent the continuous rotation of the drive motor M1 and reduce the loss of the drive motor M1; the structure is simple and easy to implement.

[0079] As an optional embodiment, it also includes:

[0080] The positive terminal of the unidirectional conduction module D1 is connected to the door lock power supply and the control terminal of the first switch Q1, and the negative terminal is connected to the first terminal of the first switch Q1 and the second terminal of the energy storage capacitor C1.

[0081] And / or,

[0082] The first resistor R1 has its first end connected to the negative terminal of the unidirectional conduction module D1, and its second end connected to the first terminal of the first switch Q1 and the second terminal of the energy storage capacitor C1.

[0083] It is easy to understand that, to prevent reverse current flow from the energy storage capacitor C1 to the door lock power supply when the door lock power is cut off, a unidirectional conduction module D1 can be added to the circuit. This module D1 is connected in series between the door lock power supply and the second terminal of the energy storage capacitor C1, ensuring that current can only flow from the door lock power supply to the energy storage capacitor C1. This prevents the impact of current backflow on the door lock power supply and avoids insufficient energy in the energy storage capacitor C1 when unlocking is required, ensuring that the energy storage capacitor C1 can effectively and reliably control the first switch Q1 to conduct. Furthermore, a first resistor R1 can be connected in series with the unidirectional conduction module D1. The first resistor R1 acts as a current limiter, reducing the inrush current when the door lock power supply charges the energy storage capacitor C1. The first resistor R1 can also be implemented using other types of current limiting modules. This application does not specifically limit the specific type and implementation method of the unidirectional conduction module D1 and the first resistor R1. Figure 3 As shown, the unidirectional conduction module D1 can be implemented using a diode.

[0084] Specifically, by adding a unidirectional conduction module D1 and a first resistor R1, the safety and reliability of the door lock power supply and the energy storage capacitor C1 can be further guaranteed, ensuring the reliable charging of the energy storage capacitor C1 by the door lock power supply. The circuit structure is simple, easy to implement, and the components used are low in cost, small in size, and easy to integrate.

[0085] As an optional embodiment, it also includes:

[0086] The second resistor R2 has its first end grounded and connected to the negative terminal of the door lock power supply, and its second end connected to the positive terminal of the door lock power supply, the control terminal of the first switch Q1, and the positive terminal of the unidirectional conduction module D1.

[0087] And / or,

[0088] The third resistor R3 has its first end grounded and its second end connected to the second end of the first switch Q1, the second end of the second switch Q2, the positive drive end of the connection structure 31, and the control end of the third switch Q3.

[0089] Understandably, to ensure the effective conduction of the first switch Q1 when the door lock power is off, a grounded second resistor R2 can be added to the control terminal of the first switch Q1. The second resistor R2 acts as a pull-down resistor, pulling the control terminal of the first switch Q1 to a low level when the door lock power is abnormally off, ensuring that the gate voltage of the first switch Q1 is less than its source voltage. Simultaneously, considering that the control terminal of the third switch Q3 and the second terminal of the second switch Q2 need to remain at a low level when the first switch Q1 is off, a grounded third resistor R3 can also be added to the second terminal of the first switch Q1. The third resistor R3 acts as a pull-down resistor, pulling the second terminals of the first switch Q1, the second terminals of the second switch Q2, and the control terminal of the third switch Q3 to a low level when the first switch Q1 is off, ensuring that the second switch Q2 is on and the third switch Q3 is off when the door lock power is normally on. This application does not specifically limit the specific type and implementation method of the second resistor R2 and the third resistor R3.

[0090] Specifically, by adding a second resistor R2 and a third resistor R3, it can be further ensured that the first switch Q1, the second switch Q2, and the third switch Q3 remain off in the corresponding working scenarios, avoiding malfunctions of the first switch Q1, the second switch Q2, and the third switch Q3, and improving the accuracy and reliability of the entire emergency unlocking device circuit. The circuit structure is simple, easy to implement, and the components used are low-cost, small in size, and easy to integrate.

[0091] As an optional embodiment, it also includes:

[0092] The fourth resistor R4 has its first end connected to the control terminal of the first switch Q1, the negative drive terminal of the connection structure 31, the second end of the third switch Q3, and the door lock power supply, and its second end connected to the control terminal of the second switch Q2.

[0093] And / or,

[0094] The fifth resistor R5 has its first end connected to the positive drive terminal of the connection structure 31, the second end of the first switch Q1, and the second end of the second switch Q2, and its second end connected to the control terminal of the third switch Q3.

[0095] It is easy to understand that a fourth resistor R4 can be further added in series at the control terminal of the second switch Q2, and / or a fifth resistor R5 can be added in series at the control terminal of the third switch Q3. The fourth resistor R4 and the fifth resistor R5 can limit current. The fourth resistor R4 can limit the inrush current to the gate of the second switch Q2 when the door lock power supply controls the second switch Q2 to conduct, and the fifth resistor R5 can limit the inrush current to the gate of the third switch Q3 when the backup power supply controls the third switch Q3 to conduct. This application does not specifically limit the specific type or implementation of the fourth resistor R4 and the fifth resistor R5.

[0096] Specifically, by adding a fourth resistor R4 and a fifth resistor R5, the safety and reliability of the second switch Q2 and the third switch Q3 when they are controlled to be turned on can be further guaranteed, avoiding abnormal situations where the switches are damaged by inrush current, and improving the safety and reliability of the entire circuit part of the emergency unlocking device; the circuit structure is simple and easy to implement, and the components used are low in cost, small in size, and easy to integrate.

[0097] As an optional embodiment, it also includes:

[0098] The fourth switch Q4 has a control terminal connected to a preset reset signal. Its first terminal is connected to the negative terminal of the unidirectional conduction module D1 and the first terminal of the first resistor R1, and its second terminal is connected to the control terminal of the second switch Q2. It is used to control the second switch Q2 to conduct when it is on, so as to disconnect the connection structure 31.

[0099] And / or,

[0100] The fifth switch has a control terminal connected to a preset test signal, a first terminal connected to the door lock power supply, and a second terminal connected to the positive terminal of the unidirectional conduction module D1 and the control terminal of the first switch Q1, respectively, for controlling the conduction or cutoff based on the preset test signal.

[0101] It is understandable that, based on the above embodiments, in addition to using the power outage of the door lock as a trigger signal to activate the emergency unlocking device, a processing unit or control unit such as an MCU (Microcontroller Unit) can be further added to actively control the circuit part of the emergency unlocking device to trigger its activation, thereby actively unlocking the target door lock 2. Taking the application of the emergency unlocking device in an automobile as an example, see... Figure 6 As shown, Figure 6 This is a schematic diagram of another emergency unlocking device provided by this utility model; it can use an MCU to detect various aspects of the vehicle's status, such as the door status and the overall vehicle status, and configure corresponding control strategies to control the closing of the connection structure 31 under specific conditions, such as... Figure 6As shown, the MCU detects the vehicle's collision signal, door lock signal, and vehicle communication, and also monitors the power status of the door lock power supply. When the MCU detects an abnormal collision signal or an abnormal power status of the door lock power supply, it can control the first switch Q1 to turn on, thereby controlling the connection structure 31 to close, establishing a physical connection between the operating device 1 and the lock cylinder of the target door lock 2 through the linkage mechanism 3. Simultaneously, an LDO (Low Dropout Regulator) is added to the circuit to power the MCU. The LDO draws power from the energy storage capacitor C1 and converts it to a 5V or 3.3V power supply voltage to power the MCU. The specific operation of the emergency unlocking device after the first switch Q1 is turned on is consistent with the operation when the door lock power supply is abnormally de-energized, and will not be elaborated further in this application. Furthermore, the fifth resistor R5 can be connected to the MCU's output terminal, and the MCU can directly output a signal to control the on or off of the third switch Q3 to control whether the linkage structure operates. The MCU can also enable the emergency unlocking device by adding a full-bridge drive circuit, allowing the MCU to flexibly control the linkage structure's operation according to the vehicle's overall strategy.

[0102] Furthermore, the circuit part of the emergency unlocking device can also be equipped with a fourth switch Q4 and / or a fifth switch. The control terminal of the fourth switch Q4 can be reserved. When it is necessary to reset the linkage mechanism 3, the control terminal of the fourth switch Q4 is connected to a preset reset signal, or it can be directly connected to the MCU to obtain the preset reset signal. When the fourth switch Q4 receives the preset reset signal, the fourth switch Q4 is turned on, thereby controlling the second switch Q2 to be turned on, forcibly resetting the linkage mechanism 3. The control terminal of the fifth switch can be reserved. When it is necessary to test the linkage mechanism 3, the control terminal of the fifth switch can be connected to a preset test signal, or directly connected to the MCU to obtain the preset test signal. When the preset test signal indicates that it is necessary to test whether the emergency unlocking device can be used normally, the preset test signal will control the fifth switch to turn off to cut off the connection between the door lock power supply and the emergency unlocking device, and test whether the linkage mechanism 3 can accurately establish the physical connection between the operating device 1 and the lock cylinder of the target door lock 2. When the preset test signal indicates that it is necessary to test whether the emergency unlocking device can be reset normally, the preset test signal will control the fifth switch to turn on to maintain the connection between the door lock power supply and the emergency unlocking device, and test whether the linkage mechanism 3 can accurately reset in time after the door lock power supply is powered on. This application does not make any special restrictions on the specific type and implementation method of the fourth switch Q4 and the fifth switch, which can be implemented by various types of switching devices such as MOSFETs and relays.

[0103] As one specific embodiment, see Figure 7 As shown, Figure 7This utility model provides a structural schematic diagram of an emergency unlocking device supporting a reset function. Under normal circumstances, the fourth switch Q4 remains off. The emergency unlocking device controls the connection structure 31 to operate according to different power states of the door lock. When the door lock power is normally powered on, it remains reset, the connection structure 31 is disconnected, and the operating device 1 will not affect the normal operation of the target door lock 2. When the door lock power is abnormally de-energized, the emergency unlocking device is activated, the connection structure 31 is closed, and a physical connection is established between the operating device 1 and the lock cylinder of the target door lock 2 through the linkage mechanism 3. If the door lock power is normally powered on, the linkage mechanism 3 can be reset by charging the reset capacitor C2. The fourth switch Q4 is set to ensure that if the reset of the linkage mechanism 3 does not achieve the expected result when the door lock power is powered on, it can be reset again to ensure the reset of the linkage mechanism 3. The manual forced reset of the emergency unlocking device is achieved by controlling the fourth switch Q4. See [link to documentation]. Figure 8 As shown, Figure 8 This utility model provides a circuit diagram of an emergency unlocking device during a reset operation. After the MCU controls the fourth switch Q4 to be turned on, the door lock power supply will flow through the turned-on fourth switch Q4 to the negative drive terminal of the drive motor M1 and the control terminal of the second switch Q2, controlling the second switch Q2 to be turned on, thereby causing the drive motor M1 to reverse counterclockwise, controlling the connection structure 31 to be disconnected, and controlling the linkage mechanism 3 to disengage the physical connection between the control device and the lock cylinder of the target door lock 2, preventing the door from being opened unexpectedly from the outside of the vehicle through the mechanical door handle.

[0104] Furthermore, the MCU can perform real-time detection and diagnosis of the door lock power supply, the backup power supply when the emergency unlocking circuit is activated, the drive motor M1 in the linkage mechanism 3, collision signals, door lock signals, and vehicle communication, and execute corresponding operation strategies. For example, the status diagnosis of the linkage mechanism 3 can determine whether the status of the emergency unlocking device meets expectations. If it does not meet expectations (for example, the drive motor M1 is still rotating clockwise when the door lock power is on), the fourth switch Q4 can be used to force a reset or report a fault, prompting the user to go to the repair shop for inspection.

[0105] As one specific embodiment, see Figure 9 As shown, Figure 9This utility model provides a structural diagram of an emergency unlocking device that supports testing functions. Specifically, the fifth switch can be implemented using a combination of a MOSFET switch Q5 and a relay K0. The relay K0 includes a normally closed contact and a coil structure. When the normally closed contact is in its default closed state, the door lock power supply and the emergency unlocking device remain connected. When testing is required, the MCU outputs a signal to control the MOSFET switch Q5 to conduct, allowing the coil structure to be energized through the door lock power supply and the conducting MOSFET switch Q5, thereby controlling the normally closed contact to open. At this time, the emergency unlocking device will be triggered by the disconnected door lock power supply. The MCU can then verify whether the circuitry of the emergency unlocking device functions normally, and whether it can properly control the linkage mechanism 3 to establish a physical connection and achieve a reset, through status diagnosis of the linkage mechanism 3, input power supply diagnosis, and emergency unlocking circuit power supply diagnosis.

[0106] Specifically, by setting the fourth switch Q4 and the fifth switch, the emergency unlocking device is further equipped with a forced reset function and a test function, which enables users to ensure the reliable implementation of the emergency unlocking device in actual application through forced reset and testing, thereby improving the reliability of the emergency unlocking device.

[0107] See Figure 10 As shown, Figure 10 A schematic diagram of a linkage mechanism provided by this utility model; as an optional embodiment, the connecting structure 31 is a snap-fit ​​structure, which includes a latch 311 and a locking pin 312; the linkage mechanism 3 includes:

[0108] Slide rail 11;

[0109] The drive motor M1 has its negative drive end connected to the second end of the third switch Q3 and its positive drive end connected to the second end of the second switch Q2. It is used to rotate in the first direction when the first switch Q1 is off and the second switch Q2 is on, and to rotate in the second direction when the first switch Q1 is on and the third switch Q3 is on.

[0110] Crank 12, the first end of which is fixed to drive motor M1;

[0111] The latch 311 is mounted on the slide rail 11 and connected to the operating device 1 outside the vehicle, and is used to slide along the slide rail 11 when the operating device 1 is activated.

[0112] Locking pin 312 is located at the second end of crank 12 and is connected to the lock cylinder of target door lock 2. It is used to disengage from latch 311 by rotating crank 12 when drive motor M1 rotates in the first direction; and to engage latch 311 by rotating crank 12 when drive motor M1 rotates in the second direction.

[0113] It is easy to understand that the linkage mechanism 3 can be implemented using a mechanical structure consisting of a slide rail 11, a drive motor M1, a crank 12, and a latching structure. The first end of the crank 12 is fixed to the drive motor M1, and the second end is equipped with a locking pin 312. When the drive motor M1 rotates, it can drive the crank 12 to rotate, causing the locking pin 312 to disengage from or engage with the latch 311, thereby breaking and establishing the physical connection between the operating device 1 and the lock cylinder. The latch 311 and the drive motor M1 are mounted on the slide rail 11 and can slide on it. When the locking pin 312 engages with the latch 311, if the operating device 1 is activated by an external force, it will cause the latch 311 and the drive motor M1 to slide on the slide rail 11. The crank 12 and the locking pin 312 will also move with the drive motor M1, thereby moving the lock cylinder of the target door lock 2 and unlocking it. This application does not impose any special limitations on the specific types and implementation methods of the slide rail 11, drive motor M1, crank 12 and snap-fit ​​structure.

[0114] As a specific embodiment, such as Figure 10 As shown, when the first switch Q1 is off and the second switch Q2 is on, the drive motor M1 rotates counterclockwise, and the locking pin 312 is disengaged from the latch 311. In this case, the physical connection between the operating device 1 and the lock cylinder remains disconnected. (See Figure 1 for details.) Figure 11 As shown, Figure 11 This utility model provides a schematic diagram of the operation of a linkage mechanism when the connection structure is disconnected. If the mechanical door handle (operating device 1) on the outside of the car is pulled at this time, the latch 311 will move on the slide rail 11, but it will not drive the drive motor M1, crank 12, or lock pin 312 to slide. At this time, the movement of the external mechanical door handle will not affect the normal locking and unlocking of the second lock DL2. The vehicle normally locks and unlocks the second lock DL2 through the door lock control module. When the door lock power supply fails abnormally, triggering the emergency unlocking device, the first switch Q1 and the third switch Q3 are turned on. See [link to relevant documentation]. Figure 12 As shown, Figure 12 This is a schematic diagram of the closing action of a connection structure provided by this utility model; the drive motor M1 rotates clockwise, causing the locking pin 312 to rotate 90 degrees and engage with the latch 311, establishing a physical connection between the operating device 1 and the lock cylinder. (See also...) Figure 13 As shown, Figure 13 This utility model provides a schematic diagram of the action of a linkage mechanism when the connection structure is closed; at this time, if the mechanical door handle outside the car is pulled, the latch 311 will drive the drive motor M1, crank 12 and locking pin 312 to slide, thereby driving the lock cylinder of the target door lock 2 to move and unlock.

[0115] Specifically, the connection structure 31 is achieved through a snap-fit ​​structure, and the physical connection between the locking pin 312 in the snap-fit ​​structure and the drive motor M1 is established through the crank 12, so that the rotation of the drive motor M1 can drive the movement of the locking pin 312, thereby realizing the opening or closing of the snap-fit ​​structure. The linkage mechanism 3 is realized through the combination of mechanical structures. The drive motor M1 only needs to control the locking pin 312 to move within a small range to realize the switching of the physical connection state between the operating device 1 and the lock cylinder. The required power is relatively small, avoiding the increase in the cost of the circuit part.

[0116] As an optional embodiment, the linkage mechanism 3 further includes:

[0117] The first transmission mechanism 14 has a first end connected to the operating device 1 outside the vehicle and a second end connected to the latch 311.

[0118] The second transmission mechanism 15 has its first end connected to the locking pin 312 and its second end connected to the lock cylinder of the target door lock 2.

[0119] Understandably, to ensure that the operation of the operating device 1 accurately drives the lock cylinder of the target door lock 2 when the connecting structure 31 is closed, the connection between the latch 311 and the operating device 1 can be achieved through the first transmission mechanism 14, and the connection between the locking pin 312 and the lock cylinder of the target door lock 2 can be achieved through the second transmission mechanism 15. When the mechanical door handle is pulled, the external force will drive the latch 311 to slide to the right along the slide rail 11 through the first transmission mechanism 14; when the mechanical door handle is reset, the latch 311 will also slide to the left and reset along the slide rail 11. After the emergency unlocking device is activated, the drive motor M1 rotates, enabling the first transmission mechanism 14 to establish a physical connection with the lock cylinder of the target door lock 2 through the closed latch structure and the second transmission mechanism 15. At this time, when the mechanical door handle is pulled, the external force will drive the lock cylinder of the target door lock 2 to move through the first transmission mechanism 14 and the second transmission mechanism 15 to unlock.

[0120] It should be noted that this application does not impose any particular limitations on the specific types and implementation methods of the first transmission mechanism 14 and the second transmission mechanism 15. The first transmission structure can be implemented using steel cables or connecting rods, etc. Considering that when the connecting structure 31 is disconnected, the lock cylinder of the target door lock 2 will move under the action of the door lock control module to achieve locking and unlocking, a preferred embodiment of the second transmission mechanism 15 is to use a flexible transmission mechanism, such as a flexible steel cable; or to use a transmission structure with a certain reserved length, reserving a certain movement space for the lock cylinder to move under the action of the door lock control module to achieve locking and unlocking under normal conditions, and avoiding the influence of the linkage mechanism 3 on the normal locking and unlocking of the lock cylinder of the target door lock 2.

[0121] Specifically, by setting up the first transmission mechanism 14 and the second transmission mechanism 15, the power transmission of the operation device 1 can be effectively realized, ensuring that the lock cylinder of the target door lock 2 can be driven by the operation device 1 to unlock in an emergency.

[0122] To solve the above-mentioned technical problems, this utility model also provides a car, including an operating device, a target door lock and an emergency unlocking device as described above. The operating device is disposed on the outside of the car, and the emergency unlocking device is connected to the operating device and the lock cylinder of the target door lock respectively.

[0123] The target door lock is used to lock or unlock the car doors under the control of the door lock control module inside the car.

[0124] For an introduction to the automobile provided by this utility model, please refer to the above-described embodiment of the emergency unlocking device; this utility model will not be described in detail here.

[0125] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should also be noted that in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0126] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An emergency unlocking device, characterized in that, include: A linkage mechanism is disposed between an external operating device of the vehicle and the lock cylinder of the target door lock. The linkage mechanism includes a connecting structure, a first end of which is connected to the external operating device of the vehicle, and a second end of which is connected to the lock cylinder of the target door lock. The linkage mechanism is used to connect the operating device and the lock cylinder of the target door lock when the connecting structure is closed. The energy storage capacitor, with its first end grounded, is used to output backup power when the door lock control module of the target door lock experiences an abnormal power outage. The first switch has its first end connected to the second end of the door lock power supply and the energy storage capacitor, and its second end connected to the control end of the connection structure. The control end is connected to the door lock power supply and is used to control the connection structure to close when the door lock power supply fails due to an abnormal power outage, based on the conduction of the backup power supply.

2. The emergency unlocking device according to claim 1, characterized in that, The control end of the connection structure includes a negative drive end and a positive drive end; the emergency unlocking device also includes: The second switch has its first terminal grounded and its control terminal connected to both the door lock power supply and the control terminal of the first switch. It is used to turn on when the door lock power supply is normally powered on, thereby controlling the connection structure to disconnect; and to turn off when the door lock power supply is abnormally powered off. The third switch has a first terminal grounded and a second terminal connected to the negative drive terminal of the connection structure, the control terminal of the first switch, the control terminal of the second switch, and the power supply of the door lock. The control terminal is connected to the positive drive terminal of the connection structure, the second terminal of the first switch, and the second terminal of the second switch. It is used to conduct when the first switch is on to control the connection structure to close, and to cut off when the first switch is off.

3. The emergency unlocking device according to claim 2, characterized in that, Also includes: The reset capacitor has its first end connected to the power supply of the door lock and the control terminal of the first switch, and its second end connected to the control terminal of the second switch, the second terminal of the third switch, and the negative drive terminal of the connection structure.

4. The emergency unlocking device according to claim 2, characterized in that, Also includes: The positive terminal of the unidirectional conduction module is connected to the power supply of the door lock and the control terminal of the first switch, and the negative terminal is connected to the first terminal of the first switch and the second terminal of the energy storage capacitor. And / or, The first resistor has its first end connected to the negative terminal of the unidirectional conduction module, and its second end connected to the first terminal of the first switch and the second terminal of the energy storage capacitor.

5. The emergency unlocking device according to claim 4, characterized in that, Also includes: The second resistor has its first end grounded and connected to the negative terminal of the door lock power supply, and its second end connected to the positive terminal of the door lock power supply, the control terminal of the first switch, and the positive terminal of the unidirectional conduction module, respectively. And / or, The third resistor has its first end grounded and its second end connected to the second end of the first switch, the second end of the second switch, the positive drive end of the connection structure, and the control end of the third switch.

6. The emergency unlocking device according to claim 2, characterized in that, Also includes: The fourth resistor has its first end connected to the control terminal of the first switch, the negative drive terminal of the connection structure, the second terminal of the third switch, and the power supply of the door lock, respectively, and its second end connected to the control terminal of the second switch. And / or, The fifth resistor has its first end connected to the positive drive terminal of the connection structure, the second end of the first switch, and the second end of the second switch, respectively, and its second end connected to the control terminal of the third switch.

7. The emergency unlocking device according to claim 4, characterized in that, Also includes: The fourth switch has a control terminal connected to a preset reset signal, a first terminal connected to the negative terminal of the unidirectional conduction module and the first terminal of the first resistor, and a second terminal connected to the control terminal of the second switch. It is used to control the second switch to conduct when it is on, so as to disconnect the connection structure. And / or, The fifth switch has a control terminal connected to a preset test signal, a first terminal connected to the power supply of the door lock, and a second terminal connected to the positive terminal of the unidirectional conduction module and the control terminal of the first switch, respectively, for controlling the conduction or cutoff based on the preset test signal.

8. The emergency unlocking device according to any one of claims 2 to 7, characterized in that, The connecting structure is a snap-fit ​​structure, which includes a latch and a locking pin; the linkage mechanism includes: Slide rail; The drive motor has a negative drive end connected to the second end of the third switch and a positive drive end connected to the second end of the second switch. It is used to rotate in a first direction when the first switch is off and the second switch is on, and to rotate in a second direction when the first switch is on and the third switch is on. The crank, with its first end fixed to the drive motor; The latch is mounted on the slide rail and connected to an external operating device of the vehicle, and is used to slide along the slide rail when the operating device is activated. The locking pin is disposed at the second end of the crank and connected to the lock cylinder of the target door lock. It is used to disengage from the latch by rotating the crank when the drive motor rotates in the first direction, and to engage with the latch by rotating the crank when the drive motor rotates in the second direction.

9. The emergency unlocking device according to claim 8, characterized in that, The linkage mechanism also includes: The first transmission mechanism has a first end connected to an external operating device of the vehicle and a second end connected to the latch. The second transmission mechanism has a first end connected to the locking pin and a second end connected to the lock cylinder of the target door lock.

10. A car, characterized in that, The device includes an operating device, a target door lock, and an emergency unlocking device as described in any one of claims 1 to 9, wherein the operating device is disposed on the exterior of the vehicle, and the emergency unlocking device is connected to the operating device and the lock cylinder of the target door lock, respectively. The target door lock is used to lock or unlock the car door under the control of the door lock control module inside the car.

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