Anti-misoperation circuit for trunk switch
By introducing components such as anti-malfunction delay modules into the trunk switch circuit, a 2-second delay output is achieved, which solves the problem of misoperation of existing trunk switches and ensures safety and applicability.
Patent Information
- Application Number
- CN202420490356.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-13
AI Technical Summary
The existing trunk switch is easily turned on due to accidental touch, which causes the driver to get off the vehicle and close it manually. The existing solution requires changing the original switch shape or body controller program, which cannot be applied to existing models.
A trunk switch anti-error operation circuit is designed. Through the anti-error delay module, the output enable holding module and the output protection module, the trunk is only triggered and opened after a certain period of time, including resistors, voltage regulators, and capacitors. Components such as , transistors and diodes achieve delayed output of about 2 seconds and take effect without changing the original circuit or program.
Effectively prevent misoperation, ensure that the trunk is only opened after pressing for a certain period of time, avoid unnecessary opening caused by accidental touch, and do not need to change the original vehicle circuit or program, and is suitable for existing vehicle models.
Smart Images
Figure CN222169785U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of trunk switch circuits, in particular to a trunk switch misoperation prevention circuit. Background Art
[0002] The trunk switch is generally a commonly used push-to-reset circuit switch, which unlocks the trunk by pressing it to turn on the power supply of the trunk motor on the vehicle. Since this circuit is immediately turned on, and the trunk switch is generally located at the instrument panel on the lower left of the steering wheel, it may be accidentally touched to open the trunk by lifting the foot when entering or leaving the door, so the driver needs to get out of the car and walk to the rear of the car to manually close the trunk door. This problem is difficult to avoid because the push-to-reset switch circuit does not have a long-press unlock feature. The existing approach is to avoid this problem by using a hook switch or a body controller, but it requires changing the original switch form or the body controller program and the drive pin of the circuit board control chip, which is not suitable for existing listed models. Summary of the invention
[0003] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a trunk switch anti-misoperation circuit, which does not change the circuit or body controller program on the original vehicle, so that the trunk switch can be triggered to open only after being pressed for a certain period of time.
[0004] The technical solution of the utility model: a trunk switch anti-misoperation circuit comprises an anti-misoperation delay module, the anti-misoperation delay module comprises a resistor R2, a resistor R3, a resistor R4, a resistor R8, a resistor R9, a voltage regulator D2, a capacitor C1, a transistor Q3 and a diode D1, one end of the resistor R2 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to one end of the capacitor C1, the other end of the capacitor C1 is grounded, the collector of the transistor Q3 is connected to the other end of the resistor R2, the emitter of the transistor Q3 is grounded, one end of the resistors R8 and R9 is connected to the base of the transistor Q3, the other end of the resistor R8 is connected to the emitter of the transistor Q3, one end of the resistor R3 is connected to the emitter of the transistor Q3, the other end is connected to the cathode of the diode D1, the cathode of the voltage regulator D2 is connected to the cathode of the diode D1, and the anode of the voltage regulator D2 is connected to the resistor R4.
[0005] Further configuration includes an output enable holding module, which includes a transistor Q1, a transistor Q2, resistors R5, R6, R7, R11 and a capacitor C2. The emitter of the transistor Q1 is connected to the cathode of the diode D1, the base of the transistor Q1 is connected to one end of the resistor R6, the other end of the resistor R6 is connected to the resistor R2, the collector of the transistor Q1 is connected to one end of the resistor R5, the resistor R5 is connected in parallel with the resistor R4, and the other ends of both are connected to the base of the transistor Q2, the emitter of the transistor Q2 is connected to one end of the resistor R11, the other end of R11 is connected to the resistor R6, the emitter of the transistor Q2 is connected to the emitter of the transistor Q3, the capacitor C2 is connected in parallel with the resistor R7, and one end is connected to the base of the transistor Q2, and the other end is connected to the emitter of the transistor Q3, and the other end of the resistor R9 is connected to the collector of the transistor Q1.
[0006] Further configuration includes an output protection module, the output protection module includes a resistor R10, and the collector of the transistor Q3 is connected to the resistor R2 via the resistor R10.
[0007] Further configuration includes a micro switch S1A, one end of the micro switch S1A is externally connected to a resistor R1, and the other end of the resistor R2 is connected to the other end of the micro switch S1A.
[0008] The beneficial effects of the utility model are as follows: the anti-misoperation delay module realizes the output of the conduction signal with a delay of about 2 seconds, the output enable holding module realizes the output of the anti-misoperation delay module can be stably driven, and the output protection module realizes overload current limiting protection;
[0009] Resistor R1 represents the external load, S1A represents the normally open micro switch. When S1A is closed, the resistor R2 and diode D1 flow current to charge capacitor C1. When the voltage regulator D2 fails to conduct, the transistor Q3 does not conduct due to no driving signal. The entire circuit is in a high impedance state. The relay represented by the resistor R1 load cannot obtain sufficient working voltage and does not work for about 2 seconds before the switch is closed, which has the effect of preventing false operation.
[0010] When capacitor C1 is charged to make Zener diode D2 conduct, transistors Q2 and Q1 are also conducted and accelerate the driving of transistor Q3 to conduct completely, making the whole circuit into a low impedance state. The relay represented by resistor R1 load obtains enough working voltage and works for about 200 milliseconds to meet the request to open the trunk.
[0011] When the operator recognizes that the trunk is open, the S1A switch is released, and the capacitor C1 is completely discharged through the resistor R3 and other circuits, waiting for the next anti-malfunction operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The circuit diagram of a specific embodiment of the utility model is shown in FIG. DETAILED DESCRIPTION
[0013] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0014] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0015] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.
[0016] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that technical personnel in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0017] like Figure 1As shown, a trunk switch anti-misoperation circuit includes an anti-misoperation delay module, which includes a resistor R2, a resistor R3, a resistor R4, a resistor R8, a resistor R9, a voltage regulator D2, a capacitor C1, a transistor Q3 and a diode D1, one end of the resistor R2 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to one end of the capacitor C1, the other end of the capacitor C1 is grounded, the collector of the transistor Q3 is connected to the other end of the resistor R2, the emitter of the transistor Q3 is grounded, one end of the resistors R8 and R9 is connected to the base of the transistor Q3, the other end of the resistor R8 is connected to the emitter of the transistor Q3, one end of the resistor R3 is connected to the emitter of the transistor Q3, and the other end is connected to the cathode of the diode D1, the cathode of the voltage regulator D2 is connected to the cathode of the diode D1, and the anode of the voltage regulator D2 is connected to the resistor R4. The invention also includes an output enable holding module, which includes a transistor Q1, a transistor Q2, resistors R5, R6, R7, R11 and a capacitor C2. The emitter of the transistor Q1 is connected to the cathode of the diode D1, the base of the transistor Q1 is connected to one end of the resistor R6, the other end of the resistor R6 is connected to the resistor R2, the collector of the transistor Q1 is connected to one end of the resistor R5, the resistor R5 is connected in parallel with the resistor R4, and the other ends of both are connected to the base of the transistor Q2, the emitter of the transistor Q2 is connected to one end of the resistor R11, the other end of R11 is connected to the resistor R6, the emitter of the transistor Q2 is connected to the emitter of the transistor Q3, the capacitor C2 is connected in parallel with the resistor R7, one end of the capacitor C2 is connected to the base of the transistor Q2, the other end of the capacitor C2 is connected to the emitter of the transistor Q3, and the other end of the resistor R9 is connected to the collector of the transistor Q1.
[0018] Further configuration includes an output protection module, the output protection module includes a resistor R10, the collector of the transistor Q3 is connected to the resistor R2 through the resistor R10. A micro switch S1A is also included, one end of the micro switch S1A is externally connected to the resistor R1, and the other end of the resistor R2 is connected to the other end of the micro switch S1A.
[0019] The anti-false operation delay module delays the output of the conduction signal by about 2 seconds, the output enable holding module realizes that the output of the anti-false operation delay module can be stably driven, and the output protection module realizes overload current limiting protection. It can be used without changing the original circuits on the vehicle, the programs and circuits of other peripheral system components. This circuit can be built into the trunk switch, or it can be independently made into a two-wire module and strung in the wiring between the switch and the peripheral system, which is flexible to install.
[0020] Resistor R1 represents the external load, S1A represents the normally open micro switch. When S1A is closed, the resistor R2 and diode D1 flow current to charge capacitor C1. When the voltage regulator D2 fails to conduct, the transistor Q3 does not conduct due to no driving signal. The entire circuit is in a high impedance state. The relay represented by the resistor R1 load cannot obtain sufficient working voltage and does not work for about 2 seconds before the switch is closed, which has the effect of preventing false operation.
[0021] When capacitor C1 is charged to make Zener diode D2 conduct, transistors Q2 and Q1 are also conducted and accelerate the driving of transistor Q3 to conduct completely, making the whole circuit into a low impedance state. The relay represented by resistor R1 load obtains enough working voltage and works for about 200 milliseconds to meet the request to open the trunk.
[0022] When the operator recognizes that the trunk is open, the S1A switch is released, and the capacitor C1 is completely discharged through the resistor R3 and other circuits, waiting for the next anti-malfunction operation.
[0023] Circuit delay signal
[0024] The high potential indicates the level at the connection point between resistor R2 and resistor R10 after the S1A switch is pressed. At this time, the S1A switch is pressed. During the first 1.6 seconds (2 seconds +, -1 second) of the anti-false action time, the level is high, indicating that resistor R1 does not obtain sufficient working voltage. After the anti-false action time, the level is low (0.3 seconds), indicating that resistor R1 obtains sufficient working voltage signal and can execute the request to open the trunk door. If the switch is pressed for a long time, the above process can be repeated.
Claims
1. A trunk switch anti-misoperation circuit, characterized in that: The invention comprises an anti-false operation delay module, which comprises a resistor R2, a resistor R3, a resistor R4, a resistor R8, a resistor R9, a voltage regulator D2, a capacitor C1, a transistor Q3 and a diode D1, wherein one end of the resistor R2 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to one end of the capacitor C1, the other end of the capacitor C1 is grounded, the collector of the transistor Q3 is connected to the other end of the resistor R2, the emitter of the transistor Q3 is grounded, one end of the resistors R8 and R9 is connected to the base of the transistor Q3, the other end of the resistor R8 is connected to the emitter of the transistor Q3, one end of the resistor R3 is connected to the emitter of the transistor Q3, and the other end is connected to the cathode of the diode D1, the cathode of the voltage regulator D2 is connected to the cathode of the diode D1, and the anode of the voltage regulator D2 is connected to the resistor R4.
2. The trunk switch anti-misoperation circuit according to claim 1, characterized in that: The invention also includes an output enable holding module, which includes a transistor Q1, a transistor Q2, resistors R5, R6, R7, R11 and a capacitor C2. The emitter of the transistor Q1 is connected to the cathode of the diode D1, the base of the transistor Q1 is connected to one end of the resistor R6, the other end of the resistor R6 is connected to the resistor R2, the collector of the transistor Q1 is connected to one end of the resistor R5, the resistor R5 is connected in parallel with the resistor R4, and the other ends of both are connected to the base of the transistor Q2, the emitter of the transistor Q2 is connected to one end of the resistor R11, the other end of R11 is connected to the resistor R6, the emitter of the transistor Q2 is connected to the emitter of the transistor Q3, the capacitor C2 is connected in parallel with the resistor R7, one end of the capacitor C2 is connected to the base of the transistor Q2, the other end of the capacitor C2 is connected to the emitter of the transistor Q3, and the other end of the resistor R9 is connected to the collector of the transistor Q1.
3. The trunk switch anti-misoperation circuit according to claim 1 or 2, characterized in that: An output protection module is also included. The output protection module includes a resistor R10. The collector of the transistor Q3 is connected to the resistor R2 via the resistor R10.
4. The trunk switch anti-misoperation circuit according to claim 3, characterized in that: A micro switch S1A is also included. One end of the micro switch S1A is externally connected to a resistor R1, and the other end of the resistor R2 is connected to the other end of the micro switch S1A.