Vehicle door handle and control circuit therefor

Abstract

The application discloses a vehicle door handle and a control circuit thereof. The control circuit comprises at least one micro switch, one end of the micro switch being grounded, the micro switch being used for detecting a position change condition of a corresponding mechanism in the vehicle door handle; a surge protection circuit, the other end of the micro switch receiving a power voltage signal through the surge protection circuit, the surge protection circuit being used for reducing a current flowing through the micro switch when the micro switch is switched from being off to being on; and a capacitor, the other end of the micro switch being connected to one end of the capacitor through the surge protection circuit, the other end of the capacitor being grounded. Based on the above manner, the current value of the surge current flowing through the micro switch in the vehicle door handle can be reduced, so that the reliability of the control circuit is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle control technology, and in particular to vehicle door handles and their control circuits. Background Technology

[0002] In the existing technology, the door handles of new energy vehicles are usually hidden or semi-hidden electric vehicle door handles. Such door handles usually need to be equipped with corresponding micro switches so that the state changes of the vehicle door handle can be determined by the on and off changes of the micro switches, so as to achieve further control of the vehicle door handle.

[0003] The drawback of the existing technology is that, in order to reduce the noise when detecting the above-mentioned state changes in the corresponding control circuit, a corresponding capacitor is usually set on the control circuit to filter the noise. However, the presence of the capacitor can easily lead to a surge current with a large value flowing through the microswitch after the microswitch is turned on, due to the voltage accumulated in the capacitor. This can easily damage the microswitch, reduce its lifespan, and make the control circuit less reliable. Summary of the Invention

[0004] The main technical problem addressed in this application is how to reduce the surge current flowing through the microswitch in the vehicle door handle, thereby improving the reliability of the control circuit.

[0005] To solve the above-mentioned technical problems, the first technical solution adopted in this application is: a control circuit for a vehicle door handle, comprising: at least one micro switch, one end of which is grounded, the micro switch being used to detect the positional change of a corresponding mechanism in the vehicle door handle; a surge protection circuit, the other end of which receives a power supply voltage signal through the surge protection circuit, the surge protection circuit being used to reduce the current flowing through the micro switch when the micro switch switches from open to closed; and a capacitor, the other end of which is connected to one end of the capacitor through the surge protection circuit, the other end of which is grounded.

[0006] In some embodiments, the surge protection circuit includes: a first resistor, one end of a microswitch connected to one end of the first resistor, the other end of the first resistor connected to one end of a capacitor, and the other end of the first resistor receiving a power supply voltage signal.

[0007] In some embodiments, the surge protection circuit further includes a second resistor, with one end of the first resistor connected to one end of the second resistor, and the other end of the second resistor receiving a power supply voltage signal.

[0008] In some embodiments, the surge protection circuit further includes a transient voltage suppressor, which is connected in parallel with a capacitor.

[0009] In some embodiments, the control circuit further includes: a current sensor for detecting the current flowing through the micro switch; and a controller connected to the current sensor for controlling the vehicle door handle accordingly based on the current flowing through the micro switch.

[0010] In some embodiments, the control circuit further includes: an actuator, a controller connected to the actuator, the actuator being used to control the vehicle door handle accordingly; and the controller being used to control the vehicle door handle accordingly through the actuator based on the current flowing through the micro switch.

[0011] In some embodiments, the control circuit further includes a third resistor, one end of which receives a power supply voltage signal, and the other end of which is grounded.

[0012] In some embodiments, the target voltage is the voltage between the surge protection circuit and the micro switch; the target voltage is within a preset voltage range when the micro switch is open; wherein the preset voltage range is within the voltage sensing range of the current sensor.

[0013] To solve the above-mentioned technical problems, the second technical solution adopted in this application is: a vehicle door handle, including: the above-mentioned control circuit, the control circuit including an actuator; a handle body; at least one rocker arm, the actuator being used to control the rocker arm to perform corresponding movements, so as to drive the handle body to perform corresponding movements, and a micro switch being used to detect the positional changes of the handle body.

[0014] In some embodiments, at least one rocker arm includes: a first rocker arm, wherein the actuator controls the switching between an extended position and a retracted position of the handle body on the corresponding door via the first rocker arm; and a second rocker arm, wherein the actuator controls the switching between an unlocked position and a locked position of the handle body on the door via the second rocker arm.

[0015] Unlike existing technologies, in this application, the microswitch receives both a power supply voltage signal and a ground voltage signal. The microswitch can detect changes in the position and orientation of the corresponding mechanism in the vehicle door handle. A capacitor filters the signal representing these changes, and a surge protection circuit reduces the surge current generated by the voltage accumulated in the capacitor flowing through the microswitch in the vehicle door handle. This reduces the possibility of damage to the microswitch from excessively high surge current when it is turned on, thus improving the lifespan of the microswitch in the vehicle door handle and enhancing the reliability of the control circuit. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of one or more embodiments of the control circuit for the vehicle door handle of this application; Figure 2 This is a second schematic diagram of one or more embodiments of the control circuit for the vehicle door handle of this application; Figure 3 This is a third schematic diagram of one or more embodiments of the control circuit for the vehicle door handle of this application; Figure 4 This is a fourth schematic diagram of one or more embodiments of the control circuit for the vehicle door handle of this application; Figure 5 This is the fifth of one or more schematic diagrams illustrating the structure of the control circuit for the vehicle door handle of this application; Figure 6 This is a waveform diagram of one or more embodiments of the current flowing through the micro switch in this application; Figure 7 This is a schematic diagram of one or more embodiments of the control circuit for the vehicle door handle of this application; Figure 8 This is the seventh of one or more schematic diagrams illustrating the structure of the control circuit for the vehicle door handle of this application; Figure 9 This is the eighth of one or more schematic diagrams of the control circuit for the vehicle door handle of this application; Figure 10 This is a structural schematic diagram of one embodiment of the vehicle door handle of this application.

[0018] Reference numerals: 11, Micro switch; 111, First micro switch; 112, Second micro switch; 113, Third micro switch; 12, Surge protection circuit; 121, First resistor; 122, Second resistor; 123, Transient voltage suppressor; 13, Capacitor; 14, Current sensor; 15, Controller; 16, Actuator; 17, Third resistor; 21, Control circuit; 22, Handle body; 221, Handle contact mechanism; 23, Rocker arm; 231, First rocker arm; 2311, First rocker arm contact mechanism; 232, Second rocker arm; 2321, Second rocker arm contact mechanism. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium. Those skilled in the art can analyze the specific meaning of the above terms in this application according to the specific circumstances.

[0022] See Figure 1 , Figure 1 This is a schematic diagram of one or more embodiments of the control circuit for the vehicle door handle of this application, such as... Figure 1 As shown, the control circuit for the vehicle door handle includes at least one micro switch 11, a surge protection circuit 12, and a capacitor 13.

[0023] One end of the micro switch 11 is grounded. The micro switch 11 is used to detect the positional changes of the corresponding mechanism in the vehicle door handle.

[0024] The other end of the micro switch 11 receives the power supply voltage signal through the surge protection circuit 12. The surge protection circuit 12 is used to reduce the current value flowing through the micro switch 11 when the micro switch 11 switches from open to closed.

[0025] The other end of the micro switch 11 is connected to one end of the capacitor 13 through the surge protection circuit 12, and the other end of the capacitor 13 is grounded.

[0026] Specifically, the door handles of new energy vehicles are usually hidden or semi-hidden electric vehicle door handles. These door handles usually need to be equipped with corresponding microswitches so that the state changes of the vehicle door handle can be determined by the on / off changes of the microswitches, so as to achieve further control of the vehicle door handle.

[0027] To reduce noise during the detection of the aforementioned state changes in the corresponding control circuit, capacitors are usually installed in the control circuit to filter the noise. However, the presence of capacitors can easily lead to a surge current with a large value flowing through the microswitch after it is turned on, due to the voltage accumulated in the capacitor. This can easily damage the microswitch, reduce its lifespan, and result in lower reliability of the control circuit.

[0028] For example, when the micro switch 11 is turned on, the current applied to the micro switch 11 by the accumulated voltage of the capacitor 13 will be superimposed with the current applied to the micro switch 11 by the power supply voltage signal, thereby generating a surge current with a large value. The surge protection circuit 12 provided in this application can suppress the surge current to reduce the current impact that may be received when the micro switch 11 is turned on.

[0029] like Figure 1 As shown, VCC can be the power supply voltage signal, and GND can be the ground voltage signal provided by ground. In practice, the control circuit may also include a device for detecting the current flowing through the microswitch 11. Figure 1 (Not shown) By setting capacitor 13, when microswitch 11 is turned on, capacitor 13 can absorb noise (such as noise caused by stray signals) in the control circuit, so as to reduce the negative impact of noise on the detection result of the current flowing through microswitch 11, thereby improving the accuracy of the detection result, and further improving the accuracy of the positional change of the corresponding mechanism in the vehicle door handle determined based on microswitch 11, so as to improve the reliability of controlling the vehicle door handle.

[0030] In one example, the micro switch 11 can be turned off when the corresponding mechanism is not detected to have moved to the corresponding pose state, and turned on when the corresponding mechanism is detected to have moved to the corresponding pose state, so as to determine the pose change of the corresponding mechanism by the on / off state of the micro switch 11.

[0031] By setting up the surge protection circuit 12, when the micro switch 11 is turned on, causing the electrical energy accumulated in the capacitor 13 to be supplied to the micro switch 11 in the form of providing a corresponding accumulated voltage, that is, when the electrical energy accumulated in the capacitor 13 causes a surge current with a large value to flow through the micro switch 11, the surge current is suppressed to protect the micro switch 11, reduce the possibility of damage to the internal contact structure of the micro switch 11 due to the surge current, improve the life of the micro switch 11, and improve the reliability of the control circuit.

[0032] Unlike existing technologies, in this application, the microswitch receives both a power supply voltage signal and a ground voltage signal. The microswitch can detect changes in the position and orientation of the corresponding mechanism in the vehicle door handle. A capacitor filters the signal representing these changes, and a surge protection circuit reduces the surge current generated by the voltage accumulated in the capacitor flowing through the microswitch in the vehicle door handle. This reduces the possibility of damage to the microswitch from excessively high surge current when it is turned on, thus improving the lifespan of the microswitch in the vehicle door handle and enhancing the reliability of the control circuit.

[0033] In some embodiments, see Figure 2 , Figure 2 This is a second schematic diagram of one or more embodiments of the control circuit for the vehicle door handle of this application, as shown below. Figure 2 As shown, the surge protection circuit 12 includes a first resistor 121.

[0034] The other end of the micro switch 11 is connected to one end of the first resistor 121, the other end of the first resistor 121 is connected to one end of the capacitor 13, and the other end of the first resistor 121 receives the power supply voltage signal.

[0035] Specifically, such as Figure 2 As shown, the micro switch 11 can receive the power supply voltage signal VCC through the first resistor 121.

[0036] Therefore, when the micro switch 11 is turned on and subjected to the surge current caused by the capacitor 13, the surge current can be limited by the first resistor 121 to minimize the damage caused by the surge current to the micro switch 11, thereby improving the life of the micro switch in the vehicle door handle and improving the reliability of the control circuit.

[0037] Optionally, see Figure 3 , Figure 3 This is a third schematic diagram of one or more embodiments of the control circuit for the vehicle door handle of this application, as shown below. Figure 3 As shown, the surge protection circuit 12 also includes a second resistor 122.

[0038] The other end of the first resistor 121 is connected to one end of the second resistor 122, and the other end of the second resistor 122 receives the power supply voltage signal.

[0039] Specifically, such as Figure 3As shown, the second resistor 122 can be used to reduce the charging current corresponding to the charging when the capacitor 13 is charging based on the power supply voltage signal VCC, so as to reduce the possibility of damage to the capacitor 13 caused by excessive charging current, and also reduce the possibility of damage to the micro switch 11 due to excessive charging current, thereby improving the reliability of the control circuit.

[0040] Furthermore, the first resistor 121 and the second resistor 122 can form a voltage divider circuit. Based on the voltage divider effect, the voltage value at the point between the two resistors is reduced. That is, the voltage value of the voltage signal directly received by the micro switch 11 through the first resistor 121 is reduced, thereby reducing the surge current value received by the micro switch 11 when it is turned on. This further improves the lifespan of the micro switch in the vehicle door handle and enhances the reliability of the control circuit.

[0041] It should be noted that the resistances on the first resistor 121 and the second resistor 122 respectively meet the corresponding preset resistance ranges to reduce surge current, but still allow the current flowing through the micro switch 11 after it is turned on to be detected and identified by the corresponding current sensor, so as to perform the corresponding vehicle door handle control.

[0042] In some embodiments, see Figure 4 , Figure 4 This is a fourth schematic diagram of one or more embodiments of the control circuit for the vehicle door handle of this application, as shown below. Figure 4 As shown, the surge protection circuit 12 also includes a transient voltage suppressor 123.

[0043] Transient voltage suppressor 123 is connected in parallel with capacitor 13.

[0044] Specifically, the transient voltage suppressor 123 can be a transient voltage suppressor diode or other types of transient voltage suppressor, which is not limited here.

[0045] The transient voltage suppressor 123 can be used to reduce the voltage across the microswitch 11 when the microswitch 11 is turned on, thereby reducing the surge current received by the microswitch 11 when it is turned on, further improving the lifespan of the microswitch in the vehicle door handle and improving the reliability of the control circuit.

[0046] See one example. Figure 5 , Figure 5 This is the fifth schematic diagram of one or more embodiments of the control circuit for the vehicle door handle of this application, as shown below. Figure 5 As shown, the surge protection circuit 12 also includes the first resistor 121, the second resistor 122, and the transient voltage suppressor 123 described in the previous embodiment.

[0047] For example, see Figure 6 , Figure 6 This is a waveform diagram of one or more embodiments of the current flowing through the micro switch in this application, such as... Figure 6 As shown, P is the safe current value that the micro switch 11 is allowed to pass through. The safe current value P can be less than the boundary current value Q that the micro switch 11 is allowed to pass through.

[0048] The first waveform diagram (a) is a schematic diagram of the current flowing through the micro switch 11 when the first resistor 121, the second resistor 122 and the transient voltage suppression tube 123 are not set in the control circuit. It can be seen that when the first resistor 121, the second resistor 122 and the transient voltage suppression tube 123 are not set, after the micro switch 11 is turned on, the peak value of the current flowing through the micro switch 11 is much greater than the safe current value P and greater than the boundary current value Q.

[0049] The second waveform diagram (b) is a schematic diagram of the current flowing through the micro switch 11 when the first resistor 121 and the second resistor 122 are not set in the control circuit, but the transient voltage suppression tube 123 is set. It can be seen that when the transient voltage suppression tube 123 is set in the control circuit, after the micro switch 11 is turned on, although the peak value of the current flowing through the micro switch 11 is less than the boundary current value Q, it is still greater than the safe current value P.

[0050] The third waveform diagram (c) is a schematic diagram of the current flowing through the micro switch 11 when the first resistor 121 and the second resistor 122 are set in the control circuit, but the transient voltage suppression tube 123 is not set. It can be seen that when the first resistor 121 and the second resistor 122 are set in the control circuit, after the micro switch 11 is turned on, although the peak value of the current flowing through the micro switch 11 is less than the boundary current value Q, it is still greater than the safe current value P.

[0051] The fourth waveform diagram (d) is a schematic diagram of the current flowing through the micro switch 11 when the first resistor 121, the second resistor 122 and the transient voltage suppressor 123 are set in the control circuit. It can be seen that when the first resistor 121, the second resistor 122 and the transient voltage suppressor 123 are set at the same time, after the micro switch 11 is turned on, the peak value of the current flowing through the micro switch 11 is less than or equal to the safe current value P.

[0052] In summary, by properly configuring the surge protection circuit 12, the current value flowing through the micro switch 11 can be kept within the operating current range of the micro switch 11 (such as a current range less than the boundary current value Q or less than the boundary current value P). This reduces the possibility of damage to the micro switch caused by excessively high surge current when the micro switch is turned on, thereby improving the lifespan of the micro switch in the vehicle door handle and enhancing the reliability of the control circuit.

[0053] In one example, such as Figure 5 As shown, the surge protection circuit 12 also includes the first resistor 121, the second resistor 122, and the transient voltage suppressor 123 described in the previous embodiment.

[0054] Assume the voltage value of the power supply voltage signal VCC is U.

[0055] The resistance of the second resistor 122 is R1.

[0056] The capacitance of capacitor 13 is C1, the voltage across capacitor 13 is U(c1), the charge of capacitor 13 is Q, and the discharge time of capacitor 13 after microswitch 11 is turned on is T(c1).

[0057] The clamping voltage of the transient voltage suppressor 123 is U1. In one example, to improve the stability of controller recognition, the clamping voltage U1 of the transient voltage suppressor 123 can be configured to be within a preset voltage range when the microswitch 11 is open. The preset voltage range is within the voltage sensing range that the current sensor 14 or the controller 15 can recognize. The minimum value of the voltage sensing range is the minimum voltage of the signal that the current sensor 14 or the controller 15 can recognize, and the maximum value of the voltage sensing range is the maximum voltage of the signal that the current sensor 14 or the controller 15 can recognize.

[0058] The maximum peak value of the current allowed through the micro switch 11 is I, the maximum energizing time of the current allowed through the micro switch 11 is t, the current flowing through the micro switch 11 is I(c1), and the maximum value of the current flowing through the micro switch 11 can be denoted as I(c1max).

[0059] The resistance of the first resistor 121 is R2, and the rated power of the first resistor 121 is P1.

[0060] First, when the micro switch 11 is open, the capacitor 13 enters the voltage regulation clamping charging state, which means it is charged based on the power supply voltage signal VCC. If the time is long enough, it can eventually reach a steady state. At this time, due to the presence of the transient voltage suppression tube 123, the voltage value U(c1) across the capacitor 13 is equal to the clamping voltage U1.

[0061] According to the capacitor charge formula, when capacitor 13 is in a steady state, Q = C1 * U(c1)(∞), where, during the process when capacitor 13 is still in the voltage-clamped charging state, U(c1)(t) = U1 * (1 - e^(-t / τ1)). In addition, τ1 = R1 * C1. τ1 can be used to represent the time it takes for capacitor 13 to charge from 0 to 63.2% or discharge from 100% to 36.8%, so as to characterize the response speed of the control circuit.

[0062] Second, when the micro switch 11 is turned on, the capacitor 13 is usually fully charged, and it can be discharged through the first resistor 121.

[0063] U(c1)(t)=U1e^(-t / τ2), t≥0, τ2=R2*C1.

[0064] I(c1)=U1e^(-t / τ2) / R2+U / (R1+R2).

[0065] I(c1max)=U1 / R2+U / (R1+R2)<I.

[0066] I(c1max) is I(c1) at t=0. By means of the above method, the maximum value of the current flowing through the micro switch 11, I(c1max), can be made to be less than the maximum peak value of the current allowed to pass through the micro switch 11.

[0067] Third, the discharge time T(c1) of capacitor 13 after microswitch 11 is turned on is less than the maximum energizing time t of the current allowed to pass through microswitch 11.

[0068] That is, during the process of the voltage value U(c1) across capacitor 13 decreasing to U2=U*R2 / (R1+R2), T(c1)=τ2*ln(U1 / U2)=R2*C1*ln(U1 / U2)<t.

[0069] Fourth, the power of the first resistor 121 must be less than the rated power P1.

[0070] The power of the first resistor 121 can be determined by the maximum value I (c1max) of the current flowing through the micro switch 11, P=I(c1max)*(U1 / R2+U / (R1+R2))^2*R2<P1.

[0071] By selecting the parameters of each device within the constraints of the above formula, a control circuit that meets user needs can be constructed, improving the rationality of the parameter matching. This not only reduces the possibility of damage to the micro switch 11 due to surge current, thus improving the safety and stability of the control circuit, but also does not affect the normal identification of the current signal caused by the on / off changes of the micro switch 11 by the corresponding current sensor, thereby improving the reliability of the control circuit.

[0072] In some embodiments, see Figure 7 , Figure 7 This is a schematic diagram of one or more embodiments of the control circuit for the vehicle door handle of this application, as shown in Figure 6. Figure 7 As shown, the control circuit may also include a current sensor 14 and a controller 15.

[0073] The current sensor 14 is used to detect the current flowing through the micro switch 11.

[0074] The controller 15 is connected to the current sensor 14. The controller 15 is used to control the vehicle door handle according to the current flowing through the micro switch 11.

[0075] Specifically, such as Figure 6 As shown, when the micro switch 11 switches from off to on, the current flowing through the micro switch 11 will fluctuate accordingly. The controller 15 can detect this fluctuation through the current sensor 14 to determine that the micro switch 11 is on, and then determine the position change of the corresponding mechanism. Based on the position change of the corresponding mechanism, the controller can control the vehicle door handle accordingly to realize the unfolding of the handle, the retraction of the handle, the unlocking of the door and other types of control.

[0076] Optionally, see Figure 8 , Figure 8 This is the seventh schematic diagram of one or more embodiments of the control circuit for the vehicle door handle of this application, as shown below. Figure 8 As shown, the control circuit also includes an actuator 16.

[0077] The controller 15 is connected to the actuator 16, which is used to control the vehicle door handle.

[0078] The controller 15 is used to control the vehicle door handle accordingly via the actuator 16 based on the current flowing through the micro switch 11.

[0079] Specifically, in one example, the actuator can be a motor with driving capability, or other types of devices with driving capability, which are not limited here.

[0080] The controller 15 can detect the fluctuation phenomenon through the current sensor 14 to determine that the micro switch 11 is turned on, and thus determine the positional change of the corresponding mechanism. Based on the actuator 16, the controller 15 can perform corresponding control on the vehicle door handle to realize the unfolding of the handle, the retraction of the handle, the unlocking of the door and other types of control.

[0081] See one example. Figure 9 , Figure 9 This is the eighth schematic diagram of one or more embodiments of the control circuit for the vehicle door handle of this application, as shown below. Figure 9 As shown, the control circuit may also include a third resistor 17, one end of the actuator 16 receives the power supply voltage signal through the third resistor 17, and the other end of the actuator 16 is grounded.

[0082] Optionally, such as Figure 7 or Figure 8 As shown, the current sensor 14 can be set on the line where the other end of the micro switch 11 receives the power supply voltage signal through the surge protection circuit 12, so as to perform corresponding current limiting processing on the current flowing through the actuator 16 and realize overcurrent protection for the actuator 16.

[0083] Optionally, the target voltage is the voltage between the surge protection circuit 12 and the micro switch 11.

[0084] The target voltage is within the preset voltage range when the microswitch 11 is open.

[0085] The preset voltage range is within the voltage sensing range of the current sensor 14.

[0086] Specifically, when the surge protection circuit 12 includes the transient voltage suppression transistor 123 described in the previous embodiment, the target voltage may refer to the clamping voltage of the transient voltage suppression transistor 123. In other cases, it may refer to other voltages. The specific voltage can be determined according to the actual situation and is not limited here.

[0087] The voltage sensing range can refer to the voltage range of the signal that the current sensor 14 or the controller 15 can detect. The minimum value of the voltage sensing range is the minimum voltage of the signal that the current sensor 14 or the controller 15 can recognize, and the maximum value of the voltage sensing range is the maximum voltage of the signal that the current sensor 14 or the controller 15 can recognize.

[0088] The preset voltage range may partially or completely overlap with the voltage sensing range; this is not limited here.

[0089] Based on the above method, while ensuring that the controller 15 can normally recognize the corresponding signal to detect the state of the micro switch 11, the surge current value flowing through the micro switch in the vehicle door handle can be reduced as much as possible, thereby improving the reliability of the control circuit.

[0090] See Figure 10 , Figure 10 This is a structural schematic diagram of one embodiment of the vehicle door handle of this application, as shown below. Figure 10 As shown, this application also proposes a vehicle door handle, which includes a control circuit 21, a handle body, and at least one rocker arm.

[0091] The control circuit 21 can be any of the control circuits mentioned in the previous embodiments, and will not be described again here.

[0092] The control circuit 21 may include an actuator 16.

[0093] The actuator 16 is used to control the rocker arm 23 to perform corresponding movements, so as to drive the handle body 22 to perform corresponding movements. The micro switch 11 is used to detect the positional changes of the handle body 22.

[0094] Unlike existing technologies, in this application, the microswitch receives both a power supply voltage signal and a ground voltage signal. The microswitch can detect changes in the position and orientation of the corresponding mechanism in the vehicle door handle. A capacitor filters the signal representing these changes, and a surge protection circuit reduces the surge current generated by the voltage accumulated in the capacitor flowing through the microswitch in the vehicle door handle. This reduces the possibility of damage to the microswitch from excessively high surge current when it is turned on, thus improving the lifespan of the microswitch in the vehicle door handle, enhancing the reliability of the control circuit, and ultimately improving the reliability of the vehicle door handle.

[0095] In some embodiments, at least one rocker arm 23 may include a first rocker arm 231 and a second rocker arm 232.

[0096] The actuator 16 is used to control the switching between the extended and retracted positions of the handle body 22 on the corresponding door via the first rocker arm 231.

[0097] The actuator 16 is used to control the switching between the unlocked and locked positions of the handle body 22 on the door via the second rocker arm 232.

[0098] Specifically, in one example, such as Figure 10As shown, at least one micro switch 11 may include a first micro switch 111, a second micro switch 112, and a third micro switch 113. The first micro switch 111, the second micro switch 112, and the third micro switch 113 may be fixedly installed at corresponding positions on the vehicle door, and the positional change of the rocker arm 23 may be determined by the degree of compression of the switch spring on each micro switch 11 by the rocker arm 23.

[0099] The handle body 22 may also include a handle contact mechanism 221, the first rocker arm 231 may also include a first rocker arm contact mechanism 2311, and the second rocker arm 232 may also include a second rocker arm contact mechanism 2321.

[0100] Controller 15 or the control module to which controller 15 belongs can perform the following steps: First, when the vehicle door handle needs to be unfolded, the controller 15 can control the actuator 16 to drive the first rocker arm 231 to rotate after receiving the unfolding command, so that the first rocker arm contact mechanism 2311 contacts the handle contact mechanism 221, thereby pushing the handle body 22 to rotate by pushing the handle contact mechanism 221, thus realizing the rotation of the handle body 22 and completing the unfolding of the vehicle door handle.

[0101] In addition, the first rocker arm 231 can be brought close to the first micro switch 111 to squeeze its switch spring, thus turning on the first micro switch 111, and moved away from the second micro switch 112 to release its switch spring and disconnect the second micro switch 112. Therefore, by detecting the on / off state of the first micro switch 111 and / or the second micro switch 112, the positional change of the corresponding mechanism in the vehicle door handle can be determined, thereby controlling the actuator 16 to stop working and performing corresponding control on the vehicle door handle or the vehicle after unfolding, such as controlling the vehicle to enter a standby state to wait for the user to get in or performing other controls.

[0102] Second, after the vehicle door handle has been unfolded, if a user pulls the handle body 22 (such as...), Figure 10 If the handle body 22 shown is pulled to the left side away from the rocker arm 23 or away from the vehicle, the handle contact mechanism 221 can contact the second rocker arm contact mechanism 2321. By pushing the second rocker arm contact mechanism 2321, the second rocker arm 232 is rotated, which brings the second rocker arm 232 closer to the third micro switch 113 to squeeze its switch spring and turn on the third micro switch 113. Therefore, by detecting the on / off state of the third micro switch 113, the positional change of the corresponding mechanism in the vehicle door handle can be determined, thereby controlling the actuator 16 to stop working. After detecting that the third micro switch 113 is turned on, the door where the vehicle door handle is located is unlocked so that the user can enter the vehicle.

[0103] Third, when the vehicle door handle needs to be recycled, the controller 15 can control the actuator 16 to drive the first rocker arm 231 to rotate after receiving the recycling command, so that the first rocker arm contact mechanism 2311 moves away from the handle contact mechanism 221, so that the handle contact mechanism 221 and the push handle body 22 are reset, thereby realizing the recycling of the handle body 22 and completing the recycling of the vehicle door handle.

[0104] In addition, the first rocker arm 231 can be moved away from the first micro switch 111 to release its switch spring, disconnect the first micro switch 111, and move closer to the second micro switch 112 to squeeze its switch spring, thus turning on the second micro switch 112. Therefore, by detecting the on / off state of the first micro switch 111 and / or the second micro switch 112, the positional change of the corresponding mechanism in the vehicle door handle can be determined, thereby controlling the actuator 16 to stop working and performing corresponding control on the vehicle door handle or the vehicle after recycling, such as controlling the vehicle to enter the driving state to wait for the user to press the accelerator to start driving or to perform other control.

[0105] The above is just one example. In other examples, at least one micro switch 11 may also be set in the vehicle door handle in other forms, depending on the actual needs, and is not limited here.

[0106] In the description of this application, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0107] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0108] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0109] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (which may be a personal computer, server, network device, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0110] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A control circuit for a vehicle door handle, characterized in that, include: At least one microswitch, one end of which is grounded, is used to detect the positional changes of the corresponding mechanism in the vehicle door handle; A surge protection circuit is provided, wherein the other end of the micro switch receives a power supply voltage signal through the surge protection circuit, and the surge protection circuit is used to reduce the current value flowing through the micro switch when the micro switch switches from open to closed. The capacitor has one end connected to one end of the microswitch via the surge protection circuit, and the other end of the capacitor is grounded.

2. The control circuit according to claim 1, characterized in that, The surge protection circuit includes: The first resistor is connected to one end of the micro switch, and the other end of the first resistor is connected to one end of the capacitor. The other end of the first resistor receives the power supply voltage signal.

3. The control circuit according to claim 2, characterized in that, The surge protection circuit also includes: The second resistor is connected to one end of the first resistor, and the other end of the second resistor receives the power supply voltage signal.

4. The control circuit according to any one of claims 1-3, characterized in that, The surge protection circuit also includes: A transient voltage suppressor is provided, which is connected in parallel with the capacitor.

5. The control circuit according to any one of claims 1-3, characterized in that, The control circuit also includes: A current sensor is used to detect the current flowing through the micro switch; A controller, connected to the current sensor, is used to control the vehicle door handle based on the current flowing through the microswitch.

6. The control circuit according to claim 5, characterized in that, The control circuit also includes: An actuator, the controller being connected to the actuator, the actuator being used to control the vehicle door handle accordingly; The controller is used to control the vehicle door handle accordingly through the actuator based on the current flowing through the micro switch.

7. The control circuit according to claim 6, characterized in that, The control circuit also includes: The third resistor is used to receive the power supply voltage signal at one end of the actuator, while the other end of the actuator is grounded.

8. The control circuit according to claim 5, characterized in that, The target voltage is the voltage between the surge protection circuit and the micro switch; The target voltage is within a preset voltage range when the micro switch is off; The preset voltage range is within the voltage sensing range of the current sensor.

9. A vehicle door handle, characterized in that, include: The control circuit according to any one of claims 1-8, wherein the control circuit includes an actuator; Handle body; At least one rocker arm, the actuator is used to control the rocker arm to perform corresponding movements, so as to drive the handle body to perform corresponding movements, and the micro switch is used to detect the positional changes of the handle body.

10. The vehicle door handle according to claim 9, characterized in that, The at least one rocker arm includes: The first rocker arm, the actuator is used to control the switching between the extended and retracted positions of the handle body on the corresponding door through the first rocker arm; The second rocker arm is used by the actuator to control the switching between the unlocked and locked positions of the handle body on the vehicle door.

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