Parking gear key combination switch and vehicle

Abstract

The utility model discloses a parking gear button combination switch and a vehicle. The combination switch comprises a button assembly, a Hall switch, an inverting circuit and a controller. The key assembly and the Hall switch are used for generating a first Hall switch signal; the Hall switch is connected with the controller, and the Hall switch is also connected with the controller through a phase inverting circuit; the inverting circuit is used for inverting the first Hall switch signal to generate a second Hall switch signal; the controller is configured to generate a key signal according to the first Hall switch signal and the second Hall switch signal.

Description

Technical Field

[0001] The utility model relates to electrical technology, and in particular to a parking gear key combination switch and a vehicle. Background Art

[0002] With the improvement of automobile manufacturing technology and customer demand, the application of automation in automobiles has become more and more popular. Among them, the automatic control gear shifting has also derived several types, such as gear lever type, knob type, paddle type and hand-shift type. Among them, the hand-shift type gear shifting scheme is becoming more and more widely used with the popularity of new energy vehicles: automobile manufacturers using the hand-shift scheme often integrate the EPB (Electrical Park Brake) switch into the park (P) gear button, which controls the vehicle's transmission system and braking system at the same time, making the reliability of the park gear button particularly important.

[0003] In the existing technical solutions, the P gear button usually uses conductive particles or metal springs as the intermediate medium for connecting or disconnecting the key signal circuit. When conductive particles are used, the key signal circuit is connected through the contact between the conductive particles and the (circuit board) contacts, thereby generating a parking signal. When metal springs are used, the key signal circuit is connected through the contact between the center point of the metal spring and the (circuit board) contacts, thereby generating a parking signal.

[0004] Based on the above-mentioned P-shift button structure, the P-shift button has the problem that when there is foreign matter inside the switch or the number of uses increases to a certain level, the contact resistance changes, causing the contacts to fail to reliably conduct, resulting in switch signal failure. Utility Model Content

[0005] The utility model provides a parking gear key combination switch and a vehicle, so as to achieve the purpose of generating a parking signal by avoiding contact between a contact point and a conductive medium (conductive particles or metal springs), thereby avoiding the problem of switch signal failure caused by the inability of the contact point to reliably conduct due to changes in contact resistance.

[0006] In a first aspect, an embodiment of the utility model provides a parking gear key combination switch, comprising: a key assembly, a Hall switch, an inverter circuit and a controller;

[0007] The button assembly and the Hall switch are used to generate a first Hall switch signal;

[0008] The Hall switch is connected to the controller, and the Hall switch is also connected to the controller through the inverter circuit;

[0009] The inverting circuit is used to invert the first Hall switch signal to generate a second Hall switch signal;

[0010] The controller is configured to generate a key signal according to the first Hall switch signal and the second Hall switch signal.

[0011] Optionally, the button assembly includes a button, a ferromagnet, and a U-shaped magnet;

[0012] The button is fixedly connected to the ferromagnetic body, and the Hall switch is arranged in the U-shaped groove of the U-shaped magnet;

[0013] When the button is pressed, the ferromagnet is close to the U-shaped magnet, and when the button is reset, the ferromagnet is away from the U-shaped magnet.

[0014] Optionally, the inverting circuit includes a first MOS transistor, a second MOS transistor and a capacitor;

[0015] The power supply end is connected to the first end of the first MOS tube, the second end of the first MOS tube is connected to the first end of the second MOS tube, and the second end of the second MOS tube is grounded;

[0016] The Hall signal input end is connected to the control end of the second MOS tube, and the second end of the first MOS tube is also connected to the Hall signal output end;

[0017] The capacitor is connected in parallel to the second end and the control end of the first MOS tube;

[0018] The Hall signal input end is used to receive the first Hall switch signal, and the Hall signal output end is used to output the second Hall switch signal.

[0019] Optionally, it also includes a housing;

[0020] The housing is provided with a first cavity and an elastic component;

[0021] The button is arranged in the first cavity and is slidably connected to the first cavity. The elastic component is used to provide pressing resistance and rebound force for the button.

[0022] Optionally, the elastic component includes a hollow elastic component, and the hollow elastic component constitutes a second cavity;

[0023] The Hall switch and the U-shaped magnet are disposed in the second cavity.

[0024] Optionally, the magnetic poles at both ends of the U-shaped magnet opening are the same.

[0025] Optionally, it further includes a control chip, the controller is connected to the control chip, and the control chip is also connected to the Hall switch;

[0026] The control chip is used to supply power to the Hall switch and convert the key signal into a communication signal output to the communication unit.

[0027] Optionally, the communication signal is a CAN signal.

[0028] Optionally, the controller adopts a single chip microcomputer.

[0029] Optionally, the control chip adopts a system basis chip.

[0030] In a second aspect, an embodiment of the utility model further provides a vehicle, comprising any one of the parking gear button combination switches described in the embodiments of the utility model.

[0031] Compared with the prior art, the beneficial effect of the utility model is as follows: the utility model proposes a parking gear key combination switch, the combination switch includes a Hall switch and an inverting circuit, and adopts a Hall switch as a sensor device for measuring the key action, avoiding the generation of a parking signal by contacting a conductive medium with a contact point, which can improve the service life of the combination switch, and can also avoid the problem of abnormal sensor signals caused by the presence of foreign matter in the combination switch, thereby causing abnormal key signals. At the same time, the first Hall switch signal generated by the Hall switch is inverted to generate a second Hall switch signal through an inverting circuit, and a controller is configured to generate a key signal based on the first Hall switch signal and the second Hall switch signal. The key signal is generated based on the two switch signals, which can avoid the generation of an unexpected pressing signal when the key is pressed, thereby improving the reliability of the key action. In addition, the combination switch is configured with an inverting circuit to cooperate with a Hall switch to generate two Hall switch signals, and the inversion of the signal based on the inverting circuit can reduce the power consumption of the combination switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a structural block diagram of the parking gear key combination switch in the embodiment;

[0033] Figure 2 is a schematic diagram of magnetic field simulation in an embodiment;

[0034] Figure 3 is another magnetic field simulation schematic diagram in the embodiment;

[0035] Figure 4 is a schematic diagram of an inverting circuit in an embodiment;

[0036] Figure 5 is another structural block diagram of a parking gear key combination switch in an embodiment;

[0037] Figure 6 It is another structural block diagram of the parking gear button combination switch in the embodiment. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0039] Embodiment 1

[0040] Figure 1 is a structural block diagram of the parking gear key combination switch in the embodiment, refer to Figure 1 The parking gear key combination switch includes: a key assembly 100, a Hall switch 200, an inverter circuit 300 and a controller 400;

[0041] The button assembly 100 and the Hall switch 200 are used to generate a first Hall switch signal;

[0042] The Hall switch 200 is connected to the controller 400, and the Hall switch 200 is also connected to the controller 400 through an inverter circuit 300;

[0043] The inverting circuit 300 is used to invert the first Hall switch signal to generate a second Hall switch signal;

[0044] The controller 400 is configured to generate a key signal according to the first Hall switch signal and the second Hall switch signal.

[0045] In this solution, the button assembly 100 includes at least a button and a ferromagnetic component, wherein the button is used as a parking gear function button, and the ferromagnetic component is used to provide the magnetic field required for the Hall switch 200 to generate the first Hall switch signal.

[0046] Exemplarily, in this solution, a ferromagnetic component is arranged to be linked with a button. When the button moves, the ferromagnetic component moves accordingly, thereby changing the distance between the ferromagnetic component and the Hall switch 200 to change the magnetic field strength of the magnetic field sensed by the Hall switch 200, thereby causing the Hall switch 200 to generate a Hall switch signal.

[0047] In this solution, the inverting circuit 300 is used to invert the first Hall switch signal to generate a second Hall switch signal. For example, if the first Hall switch signal is a high-level signal, the second Hall switch signal is a low-level signal.

[0048] In this solution, the inverter circuit 300 can be designed based on a triode or a MOS tube. When designing the circuit, the first Hall switch signal is used as the input signal of the control end of the switch tube, and the first end or the second end of the switch tube is connected to the second Hall switch signal output end. Based on the on-off characteristics of the above-mentioned switch tube, the inverter circuit 300 outputs a second Hall switch signal with a level opposite to that of the first Hall switch signal.

[0049] In this solution, the controller 400 is configured to generate a key signal when receiving the first Hall switch signal and the second Hall switch signal simultaneously.

[0050] In this solution, the way in which the controller 400 generates one signal (key signal) according to two signals (first Hall switch signal and second Hall switch signal) is the same as that in the prior art, and the specific contents are not described in detail.

[0051] In this solution, the controller 400 may be a single chip microcomputer (Microcontroller Unit, MCU), an electronic control unit (Electronic Control Unit, ECU), etc.

[0052] This embodiment proposes a parking gear button combination switch, which includes a Hall switch and an inverting circuit. The Hall switch is used as a sensor device for measuring the button action, which avoids the generation of a parking signal by contacting a conductive medium with a contact point, can improve the service life of the combination switch, and can also avoid the problem of abnormal sensor signals caused by the presence of foreign matter in the combination switch, thereby causing abnormal button signals. At the same time, the first Hall switch signal generated by the Hall switch is inverted to generate a second Hall switch signal through an inverting circuit, and a controller is configured to generate a button signal based on the first Hall switch signal and the second Hall switch signal. The button signal is generated based on the two switch signals, which can avoid the generation of an unexpected pressing signal when the button is pressed, thereby improving the reliability of the button action. In addition, the combination switch is configured with an inverting circuit to cooperate with a Hall switch to generate two Hall switch signals. The inversion of the signal based on the inverting circuit can reduce the power consumption of the combination switch.

[0053] exist Figure 1 Based on the scheme shown, in one possible implementation scheme, the key assembly includes a key, a ferromagnet, and a U-shaped magnet;

[0054] The button is fixedly connected to the ferromagnetic body, and the Hall switch is arranged in the U-shaped groove of the U-shaped magnet;

[0055] When the key is pressed, the ferromagnet approaches the U-shaped magnet, and when the key is reset, the ferromagnet moves away from the U-shaped magnet.

[0056] In this solution, the magnetic field intensity in the U-shaped groove of the U-shaped magnet changes based on the change in the distance between the ferromagnet and the U-shaped magnet.

[0057] In one possible implementation, the magnetic poles at both ends of the U-shaped magnet opening are the same. For example, both ends of the U-shaped magnet opening may be N poles, and the middle section of the U-shaped magnet may be S poles.

[0058] Figure 2 is a schematic diagram of magnetic field simulation in the embodiment, Figure 3 is another magnetic field simulation schematic diagram in the embodiment, refer to Figure 2 and Figure 3 ,In this scheme, the ferromagnetic body is set to be an iron sheet;

[0059] When the iron sheet is close to the U-shaped magnet, the magnetic field in the U-shaped groove is enhanced due to the high magnetic permeability of the iron sheet and the adsorption of the magnet on the iron sheet.

[0060] When the iron sheet is away from the U-shaped magnet, because the two ends of the opening of the U-shaped magnet have the same polarity, the magnetic field in the U-shaped groove becomes weaker due to the mutual repulsion of the same polarity of the magnets.

[0061] In this solution, a U-shaped magnet is used as a permanent magnet. Based on the change in the distance between the iron sheet and the U-shaped magnet, the magnetic field strength in the U-shaped groove of the U-shaped magnet changes. The change in the magnetic field strength in the U-shaped groove is obvious, and the Hall switch can accurately generate a Hall switch signal.

[0062] Figure 4 is the schematic diagram of the inverting circuit in the embodiment, refer to Figure 4 ,exist Figure 1 On the basis of the scheme shown, in one possible implementation scheme, the inverting circuit includes a first MOS transistor M1, a second MOS transistor M2, a capacitor C1 and a resistor R1;

[0063] The power supply terminal Vdd is connected to the first end of the first MOS tube M1 through the resistor R1, the second end of the first MOS tube M1 is connected to the first end of the second MOS tube M2, and the second end of the second MOS tube M2 is grounded;

[0064] The Hall signal input terminal Vin is connected to the control terminal of the second MOS transistor M2, and the second terminal of the first MOS transistor M1 is also connected to the Hall signal output terminal Vout;

[0065] The capacitor C1 is connected in parallel to the second end and the control end of the first MOS tube M1;

[0066] The Hall signal input terminal Vin is used to receive a first Hall switch signal, and the Hall signal output terminal Vout is used to output a second Hall switch signal.

[0067] In this solution, the first MOS tube M1 and the second MOS tube M2 form a MOS bidirectional inverting circuit, wherein the first MOS tube M1 and the second MOS tube M2 are PMOS and NMOS respectively;

[0068] When the input voltage of the Hall signal input terminal Vin is greater than 0, M1 is turned on and M2 is turned off, and the output voltage of the Hall signal output terminal Vout is close to the ground voltage; when the input voltage of the Hall signal input terminal Vin is less than 0, M1 is turned off and M2 is turned on, and the output voltage of the Hall signal output terminal Vout is close to the power supply voltage Vdd, and thus the inverting circuit can realize the bidirectional inverting transformation of the input signal.

[0069] On the basis of the scheme that the key assembly includes a key, a ferromagnet, and a U-shaped magnet, in one possible implementation scheme, the combination switch further includes a housing;

[0070] A first cavity and an elastic component are arranged in the shell;

[0071] The key is arranged in the first cavity and is slidably connected to the first cavity. The elastic component is used to provide pressing resistance and rebound force for the key.

[0072] In this solution, the first cavity is set to position the key and limit the movement direction of the key.

[0073] In this solution, one end of the button is set to contact (connect) with the elastic component. When the button is pressed, the elastic component deforms, thereby applying a certain pressing resistance to the button. When the button is released, the elastic component recovers, thereby applying a certain rebound force to the button.

[0074] In this solution, there is no limitation on the location of the elastic component. The elastic component can be coaxially arranged with the key in the direction of movement of the key, or offset from the axis of the key in the direction of movement.

[0075] In this solution, there is no limitation on the structure and material of the elastic component, and the elastic component can be a spring, a metal sheet, a silicone sleeve, etc.

[0076] Based on the solution that the combination switch includes an elastic component, in one possible implementation, the elastic component includes a hollow elastic component, and the hollow elastic component constitutes a second cavity; the Hall switch and the U-shaped magnet are arranged in the second cavity.

[0077] In this solution, the hollow elastic component is set to be directly below the direction of movement of the key and coaxial with the key, and the iron sheet is set to be fixedly connected to the end of the key close to the Hall switch;

[0078] Correspondingly, the U-shaped magnet is relatively vertically arranged directly below the iron sheet, and the Hall switch is correspondingly located directly below the iron sheet.

[0079] Exemplarily, in this embodiment, the hollow elastic component can be a silicone leather cup.

[0080] Figure 5 is another parking gear key combination switch structure block diagram in the embodiment, refer to Figure 5 ,exist Figure 1 Based on the scheme shown, in one possible implementation scheme, the combination switch further includes a control chip 500, the controller 400 is connected to the control chip 500, and the control chip 500 is also connected to the Hall switch 200;

[0081] The control chip 500 is used to supply power to the Hall switch 200 and convert the key signal into a communication signal output to the communication unit.

[0082] In this solution, the communication unit may be a serial communication unit, a parallel communication unit, a differential communication unit, etc.

[0083] In this solution, the control chip may be a system basis chip (SBC).

[0084] In this solution, the communication unit may specifically be a CAN communication unit, and correspondingly, the communication signal is a CAN signal.

[0085] Figure 6 This is another parking gear key combination switch structure block diagram in the embodiment, refer to Figure 6 Based on any of the above solutions, in one possible implementation scheme, the combination switch includes:

[0086] Button 101, iron sheet 102, U-shaped magnet 103, Hall switch 200, inverter circuit 300, controller 400 and control chip 500;

[0087] The button 101 is disposed in the first cavity of the housing and is slidably connected to the first cavity. The U-shaped magnet 103 is disposed in the second cavity formed by the hollow elastic component. The Hall switch 200 is disposed in the U-shaped groove of the U-shaped magnet.

[0088] The iron sheet 102 is fixedly connected to one end of the button 101 close to the Hall switch 200. The hollow elastic component is arranged directly below the movement direction of the button 101 and is coaxially arranged with the button 101. The U-shaped magnet 103 is relatively vertically arranged directly below the iron sheet 102. The Hall switch 200 is correspondingly located directly below the iron sheet 102.

[0089] The Hall switch 200 is connected to the controller 400, and the Hall switch 200 is also connected to the controller 400 through an inverter circuit 300;

[0090] The inverting circuit 300 is used to invert the first Hall switch signal to generate a second Hall switch signal;

[0091] The controller 400 is configured to generate a key signal according to the first Hall switch signal and the second Hall switch signal;

[0092] The controller 400 is connected to the control chip 500, and the control chip 500 is also connected to the Hall switch 200;

[0093] The control chip 500 is used to supply power to the Hall switch 200 and convert the key signal into a communication signal output to the communication unit.

[0094] In this solution, the magnetic poles at both ends of the opening of the U-shaped magnet 103 are set to be the same, and the controller 400 is set to use an MCU and the control chip 500 is set to use an SBC.

[0095] In this solution, the specific structure and working mode of the inverting circuit 300 are similar to those of Figure 4 The corresponding contents recorded in the shown schemes are the same.

[0096] In this solution, the service life of the combination switch is about 1 million times, the protection level is IP5K3, the functional safety level is ASTLB, and the rising edge / falling edge time of the controller to generate the key signal is 2.5ms.

[0097] Embodiment 2

[0098] This embodiment provides a vehicle, including any one of the parking gear button combination switches recorded in the first embodiment. The implementation method and beneficial effects of the combination switch are the same as the corresponding contents recorded in the first embodiment, and the specific contents will not be described in detail.

[0099] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A parking gear key combination switch, characterized in that: include: Button assembly, Hall switch, inverter circuit and controller; The button assembly and the Hall switch are used to generate a first Hall switch signal; The Hall switch is connected to the controller, and the Hall switch is also connected to the controller through the inverter circuit; The inverting circuit is used to invert the first Hall switch signal to generate a second Hall switch signal; The controller is configured to generate a key signal according to the first Hall switch signal and the second Hall switch signal.

2. The parking gear key combination switch according to claim 1, characterized in that: The key assembly includes a key, a ferromagnet, and a U-shaped magnet; The button is fixedly connected to the ferromagnetic body, and the Hall switch is arranged in the U-shaped groove of the U-shaped magnet; When the button is pressed, the ferromagnet is close to the U-shaped magnet, and when the button is reset, the ferromagnet is away from the U-shaped magnet.

3. The parking gear key combination switch according to claim 1, characterized in that: The inverting circuit comprises a first MOS tube, a second MOS tube and a capacitor; The power supply end is connected to the first end of the first MOS tube, the second end of the first MOS tube is connected to the first end of the second MOS tube, and the second end of the second MOS tube is grounded; The Hall signal input end is connected to the control end of the second MOS tube, and the second end of the first MOS tube is also connected to the Hall signal output end; The capacitor is connected in parallel to the second end and the control end of the first MOS tube; The Hall signal input end is used to receive the first Hall switch signal, and the Hall signal output end is used to output the second Hall switch signal.

4. The parking gear key combination switch according to claim 2, characterized in that: Also includes a housing; The housing is provided with a first cavity and an elastic component; The button is arranged in the first cavity and is slidably connected to the first cavity. The elastic component is used to provide pressing resistance and rebound force for the button.

5. The parking gear key combination switch according to claim 4, characterized in that: The elastic component comprises a hollow elastic component, and the hollow elastic component forms a second cavity; The Hall switch and the U-shaped magnet are disposed in the second cavity.

6. The parking gear key combination switch according to claim 2, characterized in that: The magnetic poles at both ends of the U-shaped magnet opening are the same.

7. The parking gear key combination switch according to claim 1, characterized in that: It also includes a control chip, the controller is connected to the control chip, and the control chip is also connected to the Hall switch; The control chip is used to supply power to the Hall switch and convert the key signal into a communication signal output to the communication unit.

8. The parking gear key combination switch according to claim 7, characterized in that: The communication signal is a CAN signal.

9. The parking gear key combination switch according to claim 1, characterized in that: The controller adopts a single chip microcomputer.

10. A vehicle, characterized in that: It comprises the parking gear key combination switch as described in any one of claims 1 to 9.

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