Vehicle window anti-locked-rotor control circuit and vehicle window switch
The window anti-jamming control circuit composed of discrete components uses current detection to achieve motor jam protection, solving the problem that traditional window controllers cannot effectively prevent motor jams, reducing costs and improving system safety and reliability.
Patent Information
- Application Number
- CN202422825874.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-19
AI Technical Summary
Traditional window controllers fail to effectively prevent motor stalling, resulting in shortened motor life and high costs. Existing anti-stall systems rely on microcontroller programming control, which increases system complexity and cost.
A discrete component circuit consisting of a forward microswitch, a reverse microswitch, a protection relay, a transistor, and a resistor is used to implement motor stall protection through current detection, avoiding the use of expensive microcontroller programming control.
The circuit design is simplified, the cost is reduced, a rapid response is achieved when the motor is stalled, the motor is prevented from being damaged, and the safety and reliability of the system are improved.
Smart Images
Figure CN223387162U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of automobile accessories, in particular to a window anti-blocking control circuit and a window switch. Background Art
[0002] Traditional window controllers don't control motor stalls, causing them to stall for extended periods. This can lead to excessive heat generation, triggering thermal protection, and causing the system to shut down. While the motor is ultimately protected, the inability to shut down the motor in a timely manner can shorten its lifespan. If motor stalls aren't controlled, causing them to stall for extended periods, excessive heat generation can trigger thermal protection, causing the system to shut down. While the motor is ultimately protected, the inability to shut down the motor in a timely manner can shorten its lifespan.
[0003] Currently, the widely used anti-jamming window controller system is usually programmed and controlled by a microcontroller unit (MCU). The cost of the MCU and its peripheral circuits is higher than that of control circuits based on discrete components.
[0004] It can be seen that how to solve the problem of realizing anti-blocking control of vehicle windows based on discrete components is a technical problem that needs to be solved urgently by people in this field. Utility Model Content
[0005] The utility model aims to provide a vehicle window anti-blocking control circuit and a vehicle window switch, so as to solve the problem of high cost of realizing vehicle window blocking control by integrated chips.
[0006] In order to solve the above technical problems, the present invention provides a window anti-blocking control circuit, comprising:
[0007] Forward micro switch, reverse micro switch, protection relay, first transistor, second transistor, first resistor, motor for driving the window glass to rise and fall, power supply;
[0008] The output end of the power supply is connected to the normally open static contact of the forward microswitch and the normally open static contact of the reverse microswitch, and the normally closed static contact of the forward microswitch and the normally closed static contact of the reverse microswitch are grounded; the switching contact of the forward microswitch is connected to the moving contact of the protection relay and the first end of the coil of the protection relay; the second end of the coil of the protection relay is connected to the first end of the first transistor and the first end of the second transistor; the normally closed static contact of the protection relay is connected to the first end of the motor; the normally open static contact of the protection relay is connected to the control end of the first transistor, the control end of the second transistor, the first end of the first resistor, and the second end of the motor; the switching contact of the reverse microswitch is connected to the second end of the first resistor, the second end of the first transistor, and the second end of the second transistor.
[0009] As an optional solution, the above-mentioned window anti-blocking control circuit further includes: an adjustable resistor;
[0010] The adjustable resistor is connected in parallel between the first terminal and the second terminal of the motor.
[0011] As an optional solution, the above-mentioned window anti-blocking control circuit further includes: a second resistor and a first capacitor;
[0012] A first end of the second resistor is connected to a first end of the motor, a second end of the second resistor is connected to a first end of the first capacitor, and a second end of the first capacitor is connected to a second end of the motor.
[0013] As an optional solution, in the above-mentioned window anti-blocking control circuit, the first transistor is an NPN transistor;
[0014] The second end of the coil of the protection relay is connected to the collector of the NPN transistor, the normally open static contact of the protection relay is connected to the base of the NPN transistor, and the switching contact of the reversing micro switch is connected to the emitter of the NPN transistor.
[0015] As an optional solution, in the above-mentioned window anti-blocking control circuit, the second transistor is a PNP transistor;
[0016] The second end of the coil of the protection relay is connected to the collector of the PNP transistor, the normally open static contact of the protection relay is connected to the base of the PNP transistor, and the switching contact of the reversing micro switch is connected to the emitter of the PNP transistor.
[0017] As an optional solution, the above-mentioned window anti-blocking control circuit further includes: a first diode; the second end of the coil of the protection relay is connected to the collector of the NPN transistor through the first diode;
[0018] The anode of the first diode is connected to the second end of the coil of the protection relay, and the cathode of the first diode is connected to the collector of the NPN transistor.
[0019] As an optional solution, the above-mentioned window anti-blocking control circuit further includes: a second diode; the second end of the coil of the protection relay is connected to the collector of the PNP transistor through the second diode;
[0020] The cathode of the second diode is connected to the second end of the coil of the protection relay, and the anode of the second diode is connected to the collector of the PNP transistor.
[0021] As an optional solution, the above-mentioned window anti-blocking control circuit further includes: a third resistor;
[0022] The third resistor is connected in parallel between the first end and the second end of the coil of the protection relay.
[0023] As an optional solution, the above-mentioned window anti-blocking control circuit further includes: two indicator lights;
[0024] The two indicator lights are respectively connected in series to the first end of the first transistor and the first end of the second transistor.
[0025] In order to solve the above technical problems, the utility model also provides a window switch, including the above window anti-blocking control circuit.
[0026] The utility model provides a vehicle window anti-blocking control circuit, in which the output end of the power supply is connected to the normally open static contact of the forward microswitch and the normally open static contact of the reverse microswitch, and the normally closed static contact of the forward microswitch and the normally closed static contact of the reverse microswitch are grounded; the switching contact of the forward microswitch is connected to the moving contact of the protection relay and the first end of the coil of the protection relay; the second end of the coil of the protection relay is connected to the first end of the first transistor and the first end of the second transistor; the normally closed static contact of the protection relay is connected to the first end of the motor; the normally open static contact of the protection relay is connected to the control end of the first transistor, the control end of the second transistor, the first end of the first resistor, and the second end of the motor; the switching contact of the reverse microswitch is connected to the second end of the first resistor, the second end of the first transistor, and the second end of the second transistor. This application uses a forward microswitch or a reverse microswitch to drive the motor to raise or lower the window glass. When the motor stalls, the stall current increases, causing the voltage of the first resistor to change, triggering the first transistor or the second transistor to turn on, thereby energizing the coil of the protection relay, closing the normally open static contact of the protection relay, and opening the normally closed static contact, thereby disconnecting the motor from power and stopping operation. The circuit composed of discrete components avoids the use of expensive microcontroller programming control, simplifies circuit design, reduces costs, and achieves a rapid response when the motor stalls, cutting off power and preventing motor damage.
[0027] In addition, the present invention also provides a window switch, including the above-mentioned window anti-blocking control circuit, with the same effect as above. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0029] Figure 1 A circuit diagram of a window anti-jamming control circuit provided in an embodiment of the present application. DETAILED DESCRIPTION
[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.
[0031] The core of the utility model is to provide a vehicle window anti-blocking control circuit and a vehicle window switch.
[0032] In order to enable those skilled in the art to better understand the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.
[0033] A motor stall occurs when the motor continues to output torque at zero rpm. This condition is usually caused by either mechanical or human factors. This condition can result in the motor failing to start or stalling due to factors such as excessive motor load, mechanical failure, bearing damage, or bore damage. When a motor stalls, the power factor is extremely low, and the current drawn during stall (called the stall current) can reach up to seven times the rated current. This condition can damage the motor if sustained for any length of time.
[0034] There are many reasons why a window motor can stall. In cold winter weather, the stiffness of the car's window seals increases, causing increased resistance to window movement and resulting in a jam. Alternatively, an object or person may become trapped in the window during its rise, leading to a stall. This application does not limit the cause of motor stalling or the type of vehicle.
[0035] Traditional window controllers typically lack stall protection. Thermal protection only stops the motor after it has stalled for a period of time due to excessive heat generation. While this approach ultimately protects the motor, prolonged stalling shortens its lifespan and increases maintenance costs. Furthermore, existing window control systems with stall protection often utilize complex microcontroller (MCU) programming, increasing system complexity and costs.
[0036] In order to solve the above problems, the embodiment of the present application provides a window anti-blocking control circuit. Figure 1 A circuit diagram of a window anti-blocking control circuit provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, including:
[0037] Forward micro switch K1, reverse micro switch K2, protection relay K3, first transistor Q1, second transistor Q2, first resistor R1, motor for driving the window glass up and down, and power supply;
[0038] The output end of the 12V power supply is connected to the normally open static contact of the forward microswitch K1 and the normally open static contact of the reverse microswitch K2, and the normally closed static contact of the forward microswitch K1 and the normally closed static contact of the reverse microswitch K2 are grounded; the switching contact of the forward microswitch K1 is connected to the moving contact of the protection relay K3 and the first end of the coil of the protection relay K3; the second end of the coil of the protection relay K3 is connected to the first end of the first transistor Q1 and the first end of the second transistor Q2; the normally closed static contact of the protection relay K3 is connected to the first end of the motor; the normally open static contact of the protection relay K3 is connected to the control end of the first transistor Q1, the control end of the second transistor Q2, the first end of the first resistor R1, and the second end of the motor; the switching contact of the reverse microswitch K2 is connected to the second end of the first resistor R1, the second end of the first transistor Q1, and the second end of the second transistor Q2.
[0039] When the microswitch is not pressed, the normally open static contact is open and the normally closed static contact is closed. When the microswitch is pressed, the normally open static contact closes and the normally closed static contact opens. In this embodiment, the forward rotation microswitch K1 is used to control the forward rotation of the motor, and can be specifically a relay that controls the window glass to rise. The reverse rotation microswitch K2 is used to control the reverse rotation of the motor, and can be specifically a relay that controls the window glass to fall. The normally open static contacts of the forward rotation microswitch K1 and the reverse rotation microswitch K2 are both connected to the output terminal of the power supply. This means that when the microswitch is activated, the motor will receive power and start operating. Their normally closed static contacts are grounded, ensuring that the motor does not accidentally start when the microswitch is not activated. When forward rotation (raising) is required, the normally open static contact of the forward rotation microswitch K1 is connected to the moving contact. When reverse rotation (lowering) is required, the normally open static contact of the reverse rotation microswitch K2 is connected to the moving contact. The rise and fall are controlled by controlling whether the forward micro switch K1 and the reverse micro switch K2 are energized. It should be noted that the forward micro switch K1 and the reverse micro switch K2 cannot be energized at the same time.
[0040] The protection relay K3 refers to a relay used to protect the motor from damage in the event of a stall; the first transistor Q1 and the second transistor Q2 refer to semiconductor devices used to control the opening or closing of the relay, corresponding to the stall protection during forward and reverse rotation respectively; the first resistor R1 refers to a resistor used for current sampling, used to detect the magnitude of the motor current, thereby determining whether a stall occurs.
[0041] It should be noted that the normally closed static contacts, normally open static contacts, and moving contacts of the protection relay in this application constitute conversion type contacts. When the relay coil is not energized, the moving contact is disconnected from the normally open static contact and closed with the normally closed static contact; when the coil is energized, the connection state of the moving contact will change, realizing the circuit conversion.
[0042] It should be noted that the first transistor Q1 and the second transistor Q2 are key control elements, and their conduction directions are designed to be opposite to accommodate different circuit conditions. Specifically, one transistor conducts when the control voltage decreases, and the other conducts when the control voltage increases. To facilitate the technical solution description, the first transistor Q1 is described as conducting when the voltage increases, and the second transistor Q2 is conducted when the voltage decreases. This allows the system to take appropriate protective measures based on the motor's state (forward or reverse) and voltage changes in the circuit.
[0043] Specifically, when the normally open static contact of the forward microswitch K1 is closed, the power supply is connected to the first end of the motor through the normally closed contact of the protection relay K3, driving the motor to rotate forward, causing the car window glass to rise, and the current flows through the second end of the motor to the first resistor R1, and then to the ground through the normally closed static contact of the reverse microswitch K2, forming a loop; if the motor is stalled, the stall current increases, causing the voltage at the first end of the first resistor R1 to increase, causing the first transistor Q1 to turn on, and the current flows through the first transistor Q1 to the protection relay K3 coil, so that the protection relay K3 coil is energized, the normally closed static contact of the protection relay K3 is disconnected, and the normally open static contact is connected, so that the motor is powered off and stops running. During normal operation, the normally open static contact of the forward microswitch K1 is released and disconnected, and the switching contact of the forward microswitch K1 is grounded. Both ends of the motor are grounded, and it stops running.
[0044] Specifically, when the normally open static contact of the reverse microswitch K2 is closed, the power supply is connected to the second end of the first resistor R1 through the normally closed contact of the protection relay K3. Current then flows through the first resistor R1 to the second end of the motor, driving the motor to reverse and causing the window glass to lower. Current flows through the first end of the motor to the normally closed static contact of the reverse microswitch K2, and then to ground through the normally closed static contact of the forward microswitch K1, forming a loop. If the motor stalls, the stall current increases, causing the voltage at the first end of the first resistor R1 to decrease, causing the second transistor Q2 to turn on. Current flows through the second transistor Q2 to the coil of the protection relay K3, energizing the coil of the protection relay K3, disconnecting the normally closed static contact of the protection relay K3 and connecting the normally open static contact, causing the motor to lose power and stop running. During normal operation, the normally open static contact of the reverse microswitch K2 is released, disconnecting the switching contact of the reverse microswitch K2, and grounding both ends of the motor, causing it to stop running.
[0045] The window anti-blocking control circuit provided by the embodiment of the present application includes: a forward microswitch K1, a reverse microswitch K2, a protection relay K3, a first transistor Q1, a second transistor Q2, a first resistor R1, a motor for driving the window glass to rise and fall, and a power supply; the output end of the power supply is connected to the normally open static contact of the forward microswitch K1 and the normally open static contact of the reverse microswitch K2, and the normally closed static contact of the forward microswitch K1 and the normally closed static contact of the reverse microswitch K2 are grounded; the conversion contact of the forward microswitch K1 is connected to the moving contact of the protection relay K3 and the protection relay K3. The first end of the coil of the relay K3 is connected; the second end of the coil of the protection relay K3 is connected to the first end of the first transistor Q1 and the first end of the second transistor Q2; the normally closed static contact of the protection relay K3 is connected to the first end of the motor; the normally open static contact of the protection relay K3 is connected to the control end of the first transistor Q1, the control end of the second transistor Q2, the first end of the first resistor R1, and the second end of the motor; the switching contact of the reverse microswitch K2 is connected to the second end of the first resistor R1, the second end of the first transistor Q1, and the second end of the second transistor Q2. In this application, the forward microswitch K1 or the reverse microswitch K2 is used to drive the motor to move the window glass up or down. When the motor is stalled, the stall current increases, causing the voltage of the first resistor R1 to change, triggering the first transistor Q1 or the second transistor Q2 to turn on, thereby energizing the coil of the protection relay K3, closing the normally open static contact of the protection relay K3, and opening the normally closed static contact, thereby cutting off the power to the motor and stopping operation. The circuit composed of discrete components avoids the use of high-cost microcontroller programming control, simplifies circuit design, reduces costs, and achieves rapid response when the motor is stalled, cutting off power and preventing motor damage.
[0046] According to the above embodiment, in order to enhance the flexibility and adaptability of the circuit so that it can adapt to motors of different specifications and different working conditions, this embodiment provides a specific solution, wherein the above window anti-blocking control circuit further includes: an adjustable resistor RL;
[0047] The adjustable resistor RL is connected in parallel between the first terminal and the second terminal of the motor.
[0048] In this embodiment, the adjustable resistor RL can be used to fine-tune the current passing through the current sampling resistor. Since the adjustable resistor RL is connected in parallel across the motor, changing its resistance can change the current passing through the current sampling resistor, thereby adjusting the sensitivity of the current sampling.
[0049] By adjusting the value of the adjustable resistor RL, the motor's operating current can be varied, thereby changing the current threshold that triggers the transistor to conduct. The adjustable resistor RL allows the system to be optimized for different environments and loads. For example, in low-temperature environments, the motor's resistance may change. Adjusting the adjustable resistor RL can compensate for this change and maintain normal system operation. During system testing and fault diagnosis, the adjustable resistor RL can be used to simulate different operating conditions and fault conditions to verify the reliability and effectiveness of the protection circuit.
[0050] According to the above embodiment, in order to enhance the stability and reliability of the window anti-blocking control circuit, this embodiment provides a specific solution, wherein the window anti-blocking control circuit further includes: a second resistor R2, a first capacitor C1;
[0051] A first end of the second resistor R2 is connected to a first end of the motor, a second end of the second resistor R2 is connected to a first end of the first capacitor C1 , and a second end of the first capacitor C1 is connected to a second end of the motor.
[0052] To enhance the stability and reliability of the window anti-jamming control circuit while providing additional protection and regulation, the second resistor R2 and the first capacitor C1 are introduced to optimize the motor's operating characteristics and filter out noise that could affect circuit stability.
[0053] The second resistor R2 is connected in series with the first capacitor C1 and then in parallel across the motor, forming a voltage divider and clamping circuit. When the motor encounters transient high voltage or voltage fluctuations during operation, the second resistor R2 and the first capacitor C1 work together to limit the voltage across the motor, preventing damage caused by excessive voltage. The first capacitor C1 and the second resistor R2 filter out high-frequency noise and transient spikes in the circuit, thereby protecting the motor from electrical noise interference and improving the system's EMC (electromagnetic compatibility) performance. The first capacitor C1 can store and release energy, helping to smooth voltage fluctuations on the power line, improving power quality and providing a more stable operating environment for the motor.
[0054] In a specific solution, in the above-mentioned window anti-blocking control circuit, the first transistor Q1 is an NPN transistor; the second end of the coil of the protection relay K3 is connected to the collector of the NPN transistor, the normally open static contact of the protection relay K3 is connected to the base of the NPN transistor, and the switching contact of the reversing microswitch K2 is connected to the emitter of the NPN transistor.
[0055] The second transistor Q2 is a PNP transistor; the second end of the coil of the protection relay K3 is connected to the collector of the PNP transistor, the normally open static contact of the protection relay K3 is connected to the base of the PNP transistor, and the switching contact of the reversing microswitch K2 is connected to the emitter of the PNP transistor.
[0056] An NPN triode (Negative-Positive-Negative type triode) conducts when the base voltage is high, while a PNP triode (Plug-and-Play type triode) conducts when the base voltage is low, effectively preventing the window motor from stalling in both forward and reverse rotation. An NPN triode typically conducts when the base voltage is higher than the emitter voltage and the collector voltage is positive relative to the emitter. A PNP triode conducts when the base voltage is lower than the emitter voltage and the collector voltage is negative relative to the emitter.
[0057] For the NPN transistor, the second end of the coil of protection relay K3 is connected to its collector, the normally open static contact is connected to the base, and the changeover contact of the reverse microswitch K2 is connected to the emitter. This configuration allows the NPN transistor to conduct when the motor is stalled, activating protection relay K3 and quickly cutting off the power supply to the motor.
[0058] For the PNP transistor, the second end of the coil of protection relay K3 is connected to its collector, the normally open static contact is connected to the base, and the changeover contact of the reverse microswitch K2 is connected to the emitter. This configuration ensures that when the reverse motor is locked, the PNP transistor will conduct, activating protection relay K3 and quickly cutting off the power supply to the motor.
[0059] According to the above embodiment, this embodiment provides a specific solution, wherein the above window anti-blocking control circuit further includes: a first diode D1; a second end of the coil of the protection relay K3 is connected to the collector of the NPN transistor via the first diode D1;
[0060] The anode of the first diode D1 is connected to the second end of the coil of the protection relay K3 , and the cathode of the first diode D1 is connected to the collector of the NPN transistor.
[0061] Also includes: a second diode D2; a second end of the coil of the protection relay K3 is connected to the collector of the PNP transistor through the second diode D2;
[0062] The cathode of the second diode D2 is connected to the second end of the coil of the protection relay K3 , and the anode of the second diode D2 is connected to the collector of the PNP transistor.
[0063] The first diode D1 and the second diode D2 prevent reverse current from occurring in the circuit, thereby ensuring the stability and reliability of the system.
[0064] The anode of the first diode D1 is connected to the second end of the coil of the protection relay K3, and the cathode is connected to the collector of the NPN transistor. This configuration ensures that when the coil of the protection relay K3 is energized, current can only flow in one direction, preventing reverse current from damaging the NPN transistor. Similarly, the second diode D2 protects the PNP transistor, improving the relay's operating stability and extending its service life.
[0065] By introducing the first diode D1 and the second diode D2 into the window anti-jamming control circuit, the embodiment not only enhances the circuit's protection mechanism, preventing reverse current from damaging the NPN transistor, PNP transistor, and other components, but also improves system stability and response speed. This design ensures the safety and reliability of the window control system in various situations.
[0066] According to the above embodiment, this embodiment provides a specific solution, wherein the above window anti-blocking control circuit further includes: a third resistor R3;
[0067] The third resistor R3 is connected in parallel between the first end and the second end of the coil of the protection relay K3 .
[0068] In this embodiment, a third resistor R3 is connected in parallel between the first and second terminals of the coil of the protection relay K3, providing an additional current path. In the locked-rotor operating state, most of the current flows through the relay coil, while a small portion is shunted through the third resistor R3. If the coil shorts or excessive current flows for some reason, the third resistor R3 can shunt some of the current, preventing coil overload and thus protecting the relay K3 and the circuit from damage.
[0069] When the coil of the protection relay K3 is de-energized, a reverse electromotive force may be generated due to the inductive nature of the coil. The third resistor R3 can provide a path to dissipate this reverse electromotive force, reducing the impact on other components in the circuit, especially the transistor controlling the relay.
[0070] The third resistor R3 can help stabilize the voltage across the coil of the protection relay K3 and reduce malfunctions caused by voltage fluctuations. This helps improve the overall stability and reliability of the circuit.
[0071] In summary, the introduction of the third resistor R3 provides an additional protection mechanism to prevent overload of the relay K3 coil, absorb reverse electromotive force, and improve circuit stability and reliability. This ensures that the window anti-jamming control circuit operates reliably under various conditions, while also simplifying circuit design and reducing costs.
[0072] According to the above embodiment, in order to provide an intuitive feedback mechanism so that users and maintenance personnel can monitor the working status of the circuit in real time, this embodiment provides a specific solution. The above window anti-blocking control circuit further includes: two indicator lights;
[0073] The two indicator lights are respectively connected in series to a first end of the first transistor Q1 and a first end of the second transistor Q2.
[0074] Two indicator lights are connected in series to the first terminals of the first transistor Q1 and the second transistor Q2, respectively. These indicators visually display the operating status of the transistors. When the transistors are on, current flows through the indicator lights, lighting them up. When the transistors are off, the indicator lights go out. This allows users to quickly determine whether the transistors are functioning properly by observing the on and off status of the indicator lights.
[0075] Through the feedback of the indicator light, users can know whether the window motor is working normally, thereby avoiding continuing to operate when the motor is blocked, reducing damage to the window system and the risk of possible injury to passengers.
[0076] Two indicator lights provide an intuitive feedback mechanism, allowing users and maintenance personnel to monitor the circuit's operating status, particularly the transistor's operating status, in real time. This helps users and maintenance personnel understand the window anti-jamming control circuit's operating status in real time, improving system safety, reliability, and user experience.
[0077] Finally, the present application also provides a window switch, including the above-mentioned window anti-jamming control circuit.
[0078] Integrating the window anti-jam control circuit directly into the window switch makes the window control system more compact and efficient. The system takes into account the possibility of motor jams during forward and reverse rotation, and implements appropriate protection measures to prevent motor damage and improve passenger safety.
[0079] The above is a detailed introduction to the window anti-blocking control circuit and window switch provided by the present invention. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.
[0080] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.
Claims
1. A car window anti-blocking control circuit, characterized in that: include: Forward micro switch, reverse micro switch, protection relay, first transistor, second transistor, first resistor, motor for driving the window glass to rise and fall, power supply; The output end of the power supply is connected to the normally open static contact of the forward microswitch and the normally open static contact of the reverse microswitch, and the normally closed static contact of the forward microswitch and the normally closed static contact of the reverse microswitch are grounded; the switching contact of the forward microswitch is connected to the moving contact of the protection relay and the first end of the coil of the protection relay; the second end of the coil of the protection relay is connected to the first end of the first transistor and the first end of the second transistor; the normally closed static contact of the protection relay is connected to the first end of the motor; the normally open static contact of the protection relay is connected to the control end of the first transistor, the control end of the second transistor, the first end of the first resistor, and the second end of the motor; the switching contact of the reverse microswitch is connected to the second end of the first resistor, the second end of the first transistor, and the second end of the second transistor.
2. The vehicle window anti-blocking control circuit according to claim 1, characterized in that: Also includes: Adjustable resistor; The adjustable resistor is connected in parallel between the first terminal and the second terminal of the motor.
3. The vehicle window anti-blocking control circuit according to claim 1, characterized in that: Also includes: a second resistor and a first capacitor; A first end of the second resistor is connected to a first end of the motor, a second end of the second resistor is connected to a first end of the first capacitor, and a second end of the first capacitor is connected to a second end of the motor.
4. The vehicle window anti-blocking control circuit according to claim 1, characterized in that: The first transistor is an NPN transistor; The second end of the coil of the protection relay is connected to the collector of the NPN transistor, the normally open static contact of the protection relay is connected to the base of the NPN transistor, and the switching contact of the reversing micro switch is connected to the emitter of the NPN transistor.
5. The vehicle window anti-blocking control circuit according to claim 1, characterized in that: The second transistor is a PNP triode; The second end of the coil of the protection relay is connected to the collector of the PNP transistor, the normally open static contact of the protection relay is connected to the base of the PNP transistor, and the switching contact of the reversing micro switch is connected to the emitter of the PNP transistor.
6. The vehicle window anti-blocking control circuit according to claim 4, characterized in that: Also includes: a first diode; a second end of the coil of the protection relay is connected to the collector of the NPN transistor through the first diode; The anode of the first diode is connected to the second end of the coil of the protection relay, and the cathode of the first diode is connected to the collector of the NPN transistor.
7. The vehicle window anti-blocking control circuit according to claim 5, characterized in that: Also includes: a second diode; a second end of the coil of the protection relay is connected to the collector of the PNP transistor through the second diode; The cathode of the second diode is connected to the second end of the coil of the protection relay, and the anode of the second diode is connected to the collector of the PNP transistor.
8. The vehicle window anti-blocking control circuit according to claim 1, characterized in that: Also includes: The third resistor; The third resistor is connected in parallel between the first end and the second end of the coil of the protection relay.
9. The vehicle window anti-blocking control circuit according to any one of claims 1 to 8, characterized in that: Also includes: Two indicator lights; The two indicator lights are respectively connected in series to the first end of the first transistor and the first end of the second transistor.
10. A car window switch, characterized in that: The vehicle window anti-blocking control circuit comprises the vehicle window anti-blocking control circuit according to any one of claims 1 to 9.