Multi-path key independent drive control circuit

Abstract

A kind of multi-path key independent drive control circuit, including reference signal module, first key signal module, second key signal module, third key signal module, first drive module, second drive module and third drive module;The first drive module is connected between the first key signal module and first key and is turned on or turned off based on first control signal, to control the first key signal module output first key signal;The second drive module is connected between the second key signal module and second key and is turned on or turned off based on second control signal, to control the second key signal module output second key signal;The third drive module is connected between the third key signal module and third key and is turned on or turned off based on third control signal, to control the third key signal module output third key signal.The utility model can realize the individual control of each key.

Description

Technical Field

[0001] This utility model relates to the field of button driving, and more specifically, to a multi-channel independent button driving control circuit. Background Technology

[0002] Buttons are widely used in various electrical devices to achieve various control functions. In existing technology, multiple buttons need to be turned on or off simultaneously, so a single drive control circuit is typically used to control multiple buttons at the same time. However, in certain specific application scenarios, multiple buttons need to be controlled individually, which existing drive control circuits cannot achieve. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a multi-channel independent key drive control circuit that can individually control different keys, in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a multi-channel independent key drive control circuit, including a reference signal module, a first key signal module, a second key signal module, a third key signal module, a first drive module, a second drive module, and a third drive module; The reference signal module is electrically connected to the first button signal module, the second button signal module and the third button signal module respectively; The first driving module is connected between the first key signal module and the first key and is turned on or off based on the first control signal to control the first key signal module to output the first key signal; The second drive module is connected between the second key signal module and the second key and is turned on or off based on the second control signal to control the second key signal module to output the second key signal; The third driving module is connected between the third button signal module and the third button and is turned on or off based on the third control signal to control the third button signal module to output the third button signal.

[0005] In the multi-way button independent drive control circuit described in this utility model, the first drive module includes a first relay and a first relay drive unit; The first terminal of the switch of the first relay is connected to the positive input terminal, and the second terminal is connected to the first terminal of the first button; the coil of the first relay is connected to the first relay drive unit; The first relay driving unit controls the coil of the first relay to be energized or de-energized based on the first control signal, thereby controlling the switch of the first relay to be turned on or off.

[0006] In the multi-way button independent drive control circuit described in this utility model, the first relay drive unit includes a first switching transistor, a first capacitor, a first diode, a first resistor, a second resistor, and a third resistor; The control terminal of the first switching transistor receives the first control signal through the first resistor and is grounded through the second resistor. The first terminal of the first switching transistor is connected to the anode of the first diode and the first terminal of the coil of the first relay. The second terminal of the first switching transistor is grounded. The second terminal of the coil of the first relay is connected to the first power supply through the third resistor. The cathode of the first diode is connected to the second terminal of the coil of the first relay. The first capacitor is connected between the first terminal and the second terminal of the first switching transistor.

[0007] In the multi-channel independent key drive control circuit of this utility model, the first key signal module includes a first signal output unit. The power supply terminal of the first signal output unit is connected to a second power supply, the first input terminal is connected to the second terminal of the first key, the second input terminal is connected to the output terminal of the reference signal module, and the output terminal outputs the first key signal.

[0008] In the multi-way button independent drive control circuit described in this utility model, the second drive module includes a second relay and a second relay drive unit; The first terminal of the second relay switch is connected to the positive input terminal, and the second terminal is connected to the first terminal of the second button; the coil of the second relay is connected to the second relay drive unit; The second relay driving unit controls the coil of the second relay to be energized or de-energized based on the second control signal, thereby controlling the switch of the second relay to be turned on or off.

[0009] In the multi-way button independent drive control circuit described in this utility model, the second relay drive unit includes a second switching transistor, a second capacitor, a second diode, a fourth resistor, a fifth resistor, and a sixth resistor; The control terminal of the second switch receives the second control signal through the fourth resistor and is grounded through the fifth resistor. The first terminal of the second switch is connected to the anode of the second diode and the first terminal of the coil of the second relay. The second terminal of the second switch is grounded. The second terminal of the coil of the second relay is connected to the first power supply through the sixth resistor. The cathode of the second diode is connected to the second terminal of the coil of the second relay. The second capacitor is connected between the first terminal and the second terminal of the second switch.

[0010] In the multi-channel independent key drive control circuit of this utility model, the second key signal module includes a second signal output unit. The power supply terminal of the second signal output unit is connected to a second power supply, the first input terminal is connected to the second end of the second key, the second input terminal is connected to the output terminal of the reference signal module, and the output terminal outputs the second key signal.

[0011] In the multi-way button independent drive control circuit of this utility model, the third drive module includes a third relay and a third relay drive unit; The first terminal of the switch of the third relay is connected to the positive input terminal, and the second terminal is connected to the first terminal of the third button; the coil of the third relay is connected to the third relay drive unit. The third relay drive unit controls the coil of the third relay to be energized or de-energized based on the third control signal, thereby controlling the switch of the third relay to be turned on or off.

[0012] In the multi-way button independent drive control circuit of this utility model, the third relay drive unit includes a third switch, a third capacitor, a third diode, a seventh resistor, an eighth resistor, and a ninth resistor; The control terminal of the third switch receives the third control signal through the seventh resistor and is grounded through the eighth resistor. The first terminal of the third switch is connected to the anode of the third diode and the first terminal of the coil of the third relay. The second terminal of the third switch is grounded. The second terminal of the coil of the third relay is connected to the first power supply through the ninth resistor. The cathode of the third diode is connected to the second terminal of the coil of the third relay. The third capacitor is connected between the first terminal and the second terminal of the third switch.

[0013] In the multi-channel independent drive control circuit of this utility model, the third button signal module includes a third signal output unit. The power supply terminal of the third signal output unit is connected to a second power supply, the first input terminal is connected to the second terminal of the third button, the second input terminal is connected to the output terminal of the reference signal module, and the output terminal outputs the third button signal.

[0014] In the multi-channel independent key drive control circuit of this utility model, the first drive module is connected between the first key signal module and the first key and is turned on or off based on the first control signal to control the first key signal module to output the first key signal; the second drive module is connected between the second key signal module and the second key and is turned on or off based on the second control signal to control the second key signal module to output the second key signal; the third drive module is connected between the third key signal module and the third key and is turned on or off based on the third control signal to control the third key signal module to output the third key signal. Therefore, the multi-channel independent key drive control circuit of this utility model can control the first key to the third key respectively through the first control signal to the third control signal, thereby realizing the individual control of each key. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic block diagram of a preferred embodiment of the multi-way button independent drive control circuit of this utility model; Figure 2 This is a schematic diagram of another preferred embodiment of the multi-way button independent drive control circuit of this utility model; Figure 3 This is a circuit diagram of a preferred embodiment of the multi-way button independent drive control circuit of this utility model. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] Figure 1 This is a schematic block diagram of a preferred embodiment of the multi-channel button independent drive control circuit of this utility model. (See diagram for example.) Figure 1As shown, the multi-channel independent key drive control circuit includes a reference signal module 400, a first key signal module 110, a second key signal module 120, a third key signal module 130, a first drive module 210, a second drive module 220, and a third drive module 230. The reference signal module 400 is electrically connected to the first key signal module 110, the second key signal module 120, and the third key signal module 130, respectively. The first drive module 210 is connected between the first key signal module 110 and the first key 310 and is turned on or off based on a first control signal to control the first key signal module 110 to output a first key signal. The second drive module 220 is connected between the second key signal module 120 and the second key 320 and is turned on or off based on a second control signal to control the second key signal module 120 to output a second key signal. The third drive module 230 is connected between the third key signal module 130 and the third key 330 and is turned on or off based on a third control signal to control the third key signal module 130 to output a third key signal.

[0018] In a preferred embodiment of this invention, the reference signal module 400, the first button signal module 110, the second button signal module 120, and the third button signal module 130 can be constructed using any known chip and its peripheral circuitry in the art. In this invention, various button signal modules and reference signal modules are known. The button signal module can generate button signals based on the reference signal provided by the reference signal module and the trigger signal received from the button.

[0019] The inventive point of this application lies in achieving different control of the button signal modules corresponding to different buttons by turning different driving modules on and off. Therefore, in order not to obscure the inventive point of this application, only the reference signal module 400, the first button signal module 110, the second button signal module 120, and the third button signal module 130 are briefly described. Those skilled in the art can use any known button signal generation circuit and module in the art to implement the aforementioned reference signal module 400, the first button signal module 110, the second button signal module 120, and the third button signal module 130. For example, any known signal output unit in the art can be used, such as the LTC6101 or LTC6102 chip.

[0020] The first drive module 210, the second drive module 220 and the third drive module 230 can be any switch drive module, such as a relay and a relay drive circuit.

[0021] In the multi-channel independent key drive control circuit of this utility model, the first drive module is connected between the first key signal module and the first key and is turned on or off based on the first control signal to control the first key signal module to output the first key signal; the second drive module is connected between the second key signal module and the second key and is turned on or off based on the second control signal to control the second key signal module to output the second key signal; the third drive module is connected between the third key signal module and the third key and is turned on or off based on the third control signal to control the third key signal module to output the third key signal. Therefore, the multi-channel independent key drive control circuit of this utility model can control the first key to the third key respectively through the first control signal to the third control signal, thereby realizing the individual control of each key.

[0022] Figure 2 This is a block diagram of another preferred embodiment of the multi-channel button independent drive control circuit of this utility model. Figure 2 In the preferred embodiment shown, the first driving module 210 includes a first relay 211 and a first relay driving unit 212; the first end of the switch of the first relay 211 is connected to the positive input terminal, and the second end is connected to the first end of the first button 310; the coil of the first relay 211 is connected to the first relay driving unit 212; the first relay driving unit 212 controls the coil of the first relay 211 to be energized or de-energized based on the first control signal, thereby controlling the switch of the first relay 211 to be turned on or off.

[0023] Similarly, the second drive module 220 includes a second relay 221 and a second relay drive unit 222; the first end of the switch of the second relay 221 is connected to the positive input terminal, and the second end is connected to the first end of the second button 320; the coil of the second relay 221 is connected to the second relay drive unit 222; the second relay drive unit 222 controls the coil of the second relay 221 to be energized or de-energized based on the second control signal, thereby controlling the switch of the second relay 221 to be turned on or off.

[0024] The third drive module 230 includes a third relay 231 and a third relay drive unit 232; the first end of the switch of the third relay 231 is connected to the positive input terminal, and the second end is connected to the first end of the third button 330; the coil of the third relay 231 is connected to the third relay drive unit 232; the third relay drive unit 232 controls the coil of the third relay 231 to be energized or de-energized based on the third control signal, thereby controlling the switch of the third relay 231 to be turned on or off.

[0025] Figure 3This is a circuit diagram of a preferred embodiment of the multi-channel button independent drive control circuit of this utility model. Figure 3 In the preferred embodiment shown, the multi-channel independent button drive control circuit includes a reference signal module 400, a first button signal module 110, a second button signal module 120, a third button signal module 130, a first drive module 210, a second drive module 220, and a third drive module 230. The first drive module 210 includes a first relay 211 and a first relay drive unit 212. The second drive module 220 includes a second relay 221 and a second relay drive unit 222; the third drive module 230 includes a third relay 231 and a third relay drive unit 232.

[0026] The first button signal module 110 includes a first signal output unit 111 and its peripheral circuitry. The second button signal module 120 includes a second signal output unit 121 and its peripheral circuitry. The third button signal module 130 includes a third signal output unit 131 and its peripheral circuitry. The reference signal module 400 includes a control unit 410 and its peripheral circuitry. For example, each signal output unit and control unit can use any suitable current detection chip, such as an LTC6101 or LTC6102 chip.

[0027] like Figure 3 As shown, the first relay driving unit 212 includes a first switch Q1, a first capacitor C1, a first diode D1, a first resistor R1, a second resistor R2, and a third resistor R3. The second relay driving unit 222 includes a second switch Q2, a second capacitor C2, a second diode D2, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6. The third relay driving unit 232 includes a third switch Q3, a third capacitor C3, a third diode D3, a seventh resistor R7, an eighth resistor R8, and a ninth resistor R9. The first relay 211 includes a coil K1A and a switch K1B; the second relay 221 includes a coil K2A ​​and a switch K2B; and the third relay 231 includes a coil K3A and a switch K3B.

[0028] The first terminal of the switch K1B of the first relay 211 is connected to the positive input OP:L, and the second terminal is connected to the first terminal of the first button 310. The control terminal of the first switch Q1 receives the first control signal AC1ON through the first resistor R1 and is grounded through the second resistor R2. The first terminal of the first switch Q1 is connected to the anode of the first diode D1 and the first terminal of the coil K1A of the first relay 211. The second terminal of the first switch Q1 is grounded. The second terminal of the coil K1A of the first relay 211 is connected to the first power supply +12V through the third resistor R3. The cathode of the first diode D1 is connected to the second terminal of the coil K1A of the first relay 211. The first capacitor C1 is connected between the first terminal and the second terminal of the first switch Q1. The power supply terminal 8 of the first signal output unit 111 is connected to the second power supply +3.3V. The first input terminals 12 and 2 are connected to the second terminal of the first button 310. The second input terminals 3 and 4 are connected to the output terminal of the control unit 410 to receive the reference signal. The output terminal outputs the first button signal OPI1. Here, the first signal output unit 111 can generate the first button signal OPI1 based on the reference signal and the current signal applied to the first button 310 when the switch K1B of the first relay 211 is turned on. The specific generation process can adopt any known scheme in the art, which will not be described in detail here.

[0029] The first terminal of switch K2B of the second relay 221 is connected to the positive input OP:L, and the second terminal is connected to the first terminal of the second button 320. The control terminal of the second switch Q2 receives the second control signal AC2ON through the fourth resistor R4 and is grounded through the fifth resistor R5. The first terminal of the second switch Q2 is connected to the anode of the second diode D2 and the first terminal of the coil KA2 of the second relay 221. The second terminal of the second switch Q2 is grounded. The second terminal of the coil KA2 of the second relay 221 is connected to the first power supply +12V through the sixth resistor R6. The cathode of the second diode D2 is connected to the second terminal of the coil KA2 of the second relay 221. The second capacitor C2 is connected between the first terminal and the second terminal of the second switch Q2. The power supply terminal 8 of the second signal output unit 121 is connected to the second power supply +3.3V. The first input terminals 12 and 2 receive the second button control signal OPI2. The second input terminals 3 and 4 are connected to the output terminal of the control unit 410 to receive the reference signal. The output terminal outputs the second button signal OPI2. Here, the second signal output unit 121 can generate the second button signal OPI2 based on the reference signal and the current signal applied to the second button 320 when the switch K2B of the second relay 221 is turned on. The specific generation process can adopt any known scheme in the art, which will not be described in detail here.

[0030] The first terminal of switch K3B of the third relay 231 is connected to the positive input OP:L, and the second terminal is connected to the first terminal of the third button 330. The control terminal of the third switch Q3 receives the third control signal AC3ON through the seventh resistor R7 and is grounded through the eighth resistor R8. The first terminal of the third switch Q3 is connected to the anode of the third diode D3 and the first terminal of the coil of the third relay 231. The second terminal of the third switch Q3 is grounded. The second terminal of the coil K3A of the third relay 231 is connected to the first power supply +12V through the ninth resistor R9. The cathode of the third diode D3 is connected to the second terminal of the coil K3A of the third relay 231. The third capacitor C3 is connected between the first terminal and the second terminal of the third switch Q3. The power supply terminal of the third signal output unit 131 is connected to the second power supply +3.3V. The first input terminals 12 and 2 are connected to the second terminal of the third button 330. The second input terminals 3 and 4 are connected to the output terminal of the control unit 410 to receive the reference signal. The output terminal outputs the third button signal OPI3. Here, the third signal output unit 131 can generate the third button signal OPI3 based on the reference signal and the current signal applied to the third button 330 when the switch K3B of the third relay 311 is turned on. The specific generation process can adopt any known scheme in the art, which will not be described in detail here.

[0031] In a preferred embodiment of this invention, the first switching transistor Q1, the second switching transistor Q2, and the third switching transistor Q3 can be transistors, MOSFETs, or IGBTs. In a further preferred embodiment of this invention, the multi-channel independent button drive control circuit can include a fourth button signal module and a fourth drive module. The reference signal module is further electrically connected to the first button signal module, and the fourth drive module is connected between the fourth button signal module and the fourth button and is turned on or off based on a fourth control signal to control the output of the fourth button signal. Similarly, the multi-channel independent button drive control circuit can include N button signal modules and N drive modules to drive N buttons, and its circuit structure is similar to... Figure 3 Similarly, I will not repeat myself here.

[0032] The following will combine Figure 3The principle of the multi-channel independent key drive control circuit of this utility model is explained as follows. The control terminals of the first switch Q1, the second switch Q2, and the third switch Q3 respectively receive the first to third control signals AC1ON to AC3ON, thereby controlling coils K1A, K2A, and K3A to be energized, and thus controlling switches K1B, K2B, and K3B to conduct respectively. After switches K1B, K2B, and K3B are turned on, when the corresponding keys 310 to 330 are pressed, the first key signal to the third key signal OPI1 to OPI3 are output accordingly.

[0033] In the multi-channel independent key drive control circuit of this utility model, the first drive module is connected between the first key signal module and the first key and is turned on or off based on the first control signal to control the first key signal module to output the first key signal; the second drive module is connected between the second key signal module and the second key and is turned on or off based on the second control signal to control the second key signal module to output the second key signal; the third drive module is connected between the third key signal module and the third key and is turned on or off based on the third control signal to control the third key signal module to output the third key signal. Therefore, the multi-channel independent key drive control circuit of this utility model can control the first key to the third key respectively through the first control signal to the third control signal, thereby realizing the individual control of each key.

[0034] Although this utility model has been described through specific embodiments, those skilled in the art should understand that various modifications and equivalent substitutions can be made to this utility model without departing from its scope. Furthermore, various modifications can be made to this utility model for specific situations or materials without departing from its scope. Therefore, this utility model is not limited to the specific embodiments disclosed, but should include all embodiments falling within the scope of the claims of this utility model.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-channel independent push-button drive control circuit, characterized in that, It includes a reference signal module, a first button signal module, a second button signal module, a third button signal module, a first driver module, a second driver module, and a third driver module; The reference signal module is electrically connected to the first button signal module, the second button signal module and the third button signal module respectively; The first driving module is connected between the first key signal module and the first key and is turned on or off based on the first control signal to control the first key signal module to output the first key signal; The second drive module is connected between the second key signal module and the second key and is turned on or off based on the second control signal to control the second key signal module to output the second key signal; The third driving module is connected between the third button signal module and the third button and is turned on or off based on the third control signal to control the third button signal module to output the third button signal.

2. The multi-channel independent key drive control circuit according to claim 1, characterized in that, The first drive module includes a first relay and a first relay drive unit; The first terminal of the switch of the first relay is connected to the positive input terminal, and the second terminal is connected to the first terminal of the first button; the coil of the first relay is connected to the first relay drive unit; The first relay driving unit controls the coil of the first relay to be energized or de-energized based on the first control signal, thereby controlling the switch of the first relay to be turned on or off.

3. The multi-channel independent key drive control circuit according to claim 2, characterized in that, The first relay driving unit includes a first switching transistor, a first capacitor, a first diode, a first resistor, a second resistor, and a third resistor; The control terminal of the first switching transistor receives the first control signal through the first resistor and is grounded through the second resistor. The first terminal of the first switching transistor is connected to the anode of the first diode and the first terminal of the coil of the first relay. The second terminal of the first switching transistor is grounded. The second terminal of the coil of the first relay is connected to the first power supply through the third resistor. The cathode of the first diode is connected to the second terminal of the coil of the first relay. The first capacitor is connected between the first terminal and the second terminal of the first switching transistor.

4. The multi-channel independent key drive control circuit according to claim 3, characterized in that, The first button signal module includes a first signal output unit, the power supply terminal of the first signal output unit is connected to a second power supply, the first input terminal is connected to the second end of the first button, the second input terminal is connected to the output terminal of the reference signal module, and the output terminal outputs the first button signal.

5. The multi-channel independent key drive control circuit according to claim 1, characterized in that, The second drive module includes a second relay and a second relay drive unit; The first terminal of the second relay switch is connected to the positive input terminal, and the second terminal is connected to the first terminal of the second button; the coil of the second relay is connected to the second relay drive unit; The second relay driving unit controls the coil of the second relay to be energized or de-energized based on the second control signal, thereby controlling the switch of the second relay to be turned on or off.

6. The multi-channel independent key drive control circuit according to claim 5, characterized in that, The second relay drive unit includes a second switching transistor, a second capacitor, a second diode, a fourth resistor, a fifth resistor, and a sixth resistor; The control terminal of the second switch receives the second control signal through the fourth resistor and is grounded through the fifth resistor. The first terminal of the second switch is connected to the anode of the second diode and the first terminal of the coil of the second relay. The second terminal of the second switch is grounded. The second terminal of the coil of the second relay is connected to the first power supply through the sixth resistor. The cathode of the second diode is connected to the second terminal of the coil of the second relay. The second capacitor is connected between the first terminal and the second terminal of the second switch.

7. The multi-channel independent key drive control circuit according to claim 6, characterized in that, The second button signal module includes a second signal output unit. The power supply terminal of the second signal output unit is connected to a second power supply, the first input terminal is connected to the second end of the second button, the second input terminal is connected to the output terminal of the reference signal module, and the output terminal outputs the second button signal.

8. The multi-channel independent key drive control circuit according to claim 7, characterized in that, The third drive module includes a third relay and a third relay drive unit; The first terminal of the switch of the third relay is connected to the positive input terminal, and the second terminal is connected to the first terminal of the third button; the coil of the third relay is connected to the third relay drive unit. The third relay drive unit controls the coil of the third relay to be energized or de-energized based on the third control signal, thereby controlling the switch of the third relay to be turned on or off.

9. The multi-channel independent key drive control circuit according to claim 8, characterized in that, The third relay drive unit includes a third switching transistor, a third capacitor, a third diode, a seventh resistor, an eighth resistor, and a ninth resistor; The control terminal of the third switch receives the third control signal through the seventh resistor and is grounded through the eighth resistor. The first terminal of the third switch is connected to the anode of the third diode and the first terminal of the coil of the third relay. The second terminal of the third switch is grounded. The second terminal of the coil of the third relay is connected to the first power supply through the ninth resistor. The cathode of the third diode is connected to the second terminal of the coil of the third relay. The third capacitor is connected between the first terminal and the second terminal of the third switch.

10. The multi-channel independent key drive control circuit according to claim 9, characterized in that, The third button signal module includes a third signal output unit. The power supply terminal of the third signal output unit is connected to a second power supply, the first input terminal is connected to the second terminal of the third button, the second input terminal is connected to the output terminal of the reference signal module, and the output terminal outputs the third button signal.

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