CN202654686U - Mahjong machine with circuit protection function - Google Patents
Mahjong machine with circuit protection function Download PDFInfo
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- CN202654686U CN202654686U CN 201220315632 CN201220315632U CN202654686U CN 202654686 U CN202654686 U CN 202654686U CN 201220315632 CN201220315632 CN 201220315632 CN 201220315632 U CN201220315632 U CN 201220315632U CN 202654686 U CN202654686 U CN 202654686U
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- mahjong machine
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- sensor
- machine mainboard
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Abstract
The utility model discloses a mahjong machine with a circuit protection function. The mahjong machine comprises a mahjong machine mainboard and a sensor used for inputting an induction signal to the mahjong machine mainboard. The mahjong machine also comprises a switch circuit and a power supply detection circuit, wherein the power supply output end of the mahjong machine mainboard is used for supplying power to the sensor through a switch circuit, the first signal output end of the mahjong machine mainboard is used for sending a first control signal to the switch circuit, the power supply detection circuit is used for detecting the input voltage of the sensor, and when the sensor is short circuited, the mahjong machine mainboard is used for sending the first control signal to the switch circuit. The utility model has the beneficial effects that when the sensor is short circuited, a power supply of the sensor can be cut off, the service life of the sensor is prolonged and the energy resources are saved, a protection system device can be protected; and a pin is additionally arranged on the circuit, when the control circuit cannot work normally as some device is damaged or due to other reasons, a pin can be linked by using a jumper cap, and a system circuit can realize the function of the original circuit and continuously and normally works.
Description
Technical field
The present invention relates to the mahjong machine field, be specifically related to a kind of mahjong machine with circuit protection function.
Background technology
In the existing mahjong machine system, the mahjong machine sensor be directly and the power supply in the system link to each other, so the power supply on the sensor is not controlled by the mahjong machine mainboard, when switching on the mahjong machine mainboard, sensor is also switched on thereupon.Because in the mahjong machine system, the sensor of mahjong machine and mahjong machine mainboard are to be connected in parallel on the mahjong machine power supply, so when short circuit sensor, the mahjong machine mainboard is still in running order, conduction time one, long not only sensor can damage, even the device on the mahjong machine mainboard also can damage.And use the number of sensors in mahjong machine more, if certain sensor wherein damage will and cause when maintenance, be difficult to find out the sensor of damage, which partial short circuit is difficult to simultaneously judge accurately in the circuit is.Even when system mahjong machine mainboard damages, change the mahjong machine mainboard, unusual trouble when maintenance not only, but also increased greatly the cost of mahjong machine maintenance.
Sensor in the existing mahjong machine is when mahjong machine is switched on, no matter whether mahjong machine works, and sensor all can be in running order, even when sensor is short-circuited phenomenon, but still can be in running order, also cause power wastage the service life that has not only shortened sensor like this.
In order to protect sensor, thus in circuit system an external short circuit sensor holding circuit.Patent Office of the People's Republic of China discloses the document of a kind of reverse-connection protection circuit by name on May 2nd, 2007, Granted publication number is CN2896632Y, and it comprises power sense circuit; Resistance unit, in parallel with power sense circuit; Diode, its positive pole is connected with power sense circuit, and its negative pole links to each other with an earth terminal; Or its positive pole links to each other with power input, and its negative pole links to each other with power sense circuit.The weak point of inferior scheme is can be subject to the result of the protected circuit of Meter Test in the situation that power input disconnects the impact of diode; and may damage diode when the voltge surge that powers on is excessive; in the time of excessive voltge surge, circuit loses the protection effect and the parts of mahjong machine system mahjong machine mainboard is caused very large damage.
Summary of the invention
The utility model mainly solves the deficiencies in the prior art; a kind of mahjong machine with circuit protection function is provided; when short circuit phenomenon occurring in the circuit in the mahjong machine, machine is deenergization initiatively, thereby reaches the effect of device on protection sensor and the mahjong machine mainboard.
A kind of mahjong machine with circuit protection function comprises the mahjong machine mainboard and to the sensor of described mahjong machine mainboard input induced signal, also comprises on-off circuit and power sense circuit;
The power output end of described mahjong machine mainboard is powered to described sensor by on-off circuit, and the first signal output of described mahjong machine mainboard sends the first control signal to on-off circuit;
Power sense circuit detects the input voltage of described sensor, during short circuit sensor, sends the first control signal by the mahjong machine mainboard to described on-off circuit.
The first control signal turning circuit that the first signal output of wherein said on-off circuit by the mahjong machine mainboard sends is sensor energize behind the circuit turn-on, and wherein the input power VCC2 of sensor is the effective voltage after the on-off circuit conducting.
As preferably, the mahjong machine mainboard also is provided with for the secondary signal output that sends the second control signal to power sense circuit.
The second control signal detecting sensor input power VCC2 that the secondary signal output of power sense circuit by the mahjong machine mainboard sends; judge whether short circuit of sensor; when short circuit sensor (sensor input low level); this moment, power sense circuit fed back to the mahjong machine mainboard with information; the mahjong machine mainboard sends to on-off circuit with the first control information; on-off circuit obtains the first control signal disconnecting circuit, and sensor quits work, thus the protection sensor.
As preferably, first signal output and secondary signal output are same port.
The second control signal that the first control signal that the first signal output of mahjong machine mainboard sends and secondary signal output send is synchronizing signal.When power supply during to the mahjong machine main board power supply, the signal output part of mahjong machine mainboard is output the first control signal and the second control signal synchronously, and on-off circuit and power sense circuit are worked simultaneously.
As preferably, the power output end of mahjong machine mainboard is also powered to sensor by second circuit, and this second circuit is provided with switch.
Second circuit wherein is set in the circuit mainly is when circuit system and break down and during cisco unity malfunction, by being arranged on the switch on the second circuit, circuit system can be realized again the function of original circuit, temporarily recover normal operation.
As preferably, the switch on the second circuit is contact pin.
When control circuit can't work because of device failure or other reason, available jumper cap connected contact pin, and circuit system can be realized again the function of original circuit, normal operation.
As preferably, on-off circuit comprises:
Triode, the colelctor electrode of triode are connected to mahjong machine motherboard power supply output, and the emitter stage of triode is connected to the input of sensor;
The first resistance, the first resistance are connected between the first signal output of the colelctor electrode of triode and described mahjong machine mainboard;
The second resistance, the second resistance are connected between the first signal output of the base stage of triode and described mahjong machine mainboard.
Wherein triode plays the effect of switch, by the first control signal signal that the mahjong machine mainboard sends, and disconnecting circuit when mahjong machine mainboard output high level, when mahjong machine mainboard output low level, the on-off circuit conducting; The first resistance is pull-up resistor, and the first control signal that the mahjong machine mainboard sends is clamped at high level by resistance, plays simultaneously metering function; The second resistance is current-limiting resistance, plays metering function in circuit.
As preferably, power sense circuit comprises:
Be connected in parallel on the first electric capacity, the 4th electric capacity and the 4th resistance between described transistor emitter and the ground;
Be connected to the 3rd resistance between described mahjong machine mainboard and the transistor emitter.
Wherein the first electric capacity is that filter capacitor can have a plurality of filter capacitors to be formed in parallel, and the 4th electric capacity is the polarity electrochemical capacitor, and the first electric capacity and the 4th electric capacity consist of filter circuit; The 4th resistance is for detecting the electric current of resistance by flowing through on the 4th resistance, can detect the value of voltage in the circuit through formula U=IR; The 3rd resistance is current-limiting resistance, limits the value of electric current in circuit.
As preferably, the mahjong machine mainboard is connected with the alarm unit that triggered by described the first control signal.
Wherein alarm unit can be worked as short circuit sensor for signal lamp and/or buzzer, and when namely on-off circuit received the first control signal disconnecting circuit, alarm unit was started working, and sent alarm signal.
Can be provided with switch between buzzer and the mahjong machine mainboard, when the user receives the alarm signal of alarm unit, for the sound of avoiding buzzer to send affects normal life, can turn-off buzzer by switch, and signal lamp keeps duty.
The beneficial effects of the utility model:
The first, when short circuit sensor, can cut off the power supply of sensor, thereby reach the effect of protection device.
The second, when mahjong machine is in the stage that sensor does not need work, can cut off the power supply of sensor, prolong life-span and the energy savings of sensor.
The 3rd, when short trouble appears in mahjong machine, find the short circuit part during convenient for maintaining.
The 4th, increase contact pin at circuit, then when control circuit can't work because of certain device failure or other reasons, available jumper cap connected contact pin, and circuit system can be realized again the function of original circuit, continues normal operation.
Description of drawings
Fig. 1 is the utility model structured flowchart.
Fig. 2 is the utility model circuit diagram.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described.
A kind of mahjong machine with circuit protection function as shown in Figure 1, comprises the mahjong machine mainboard and to the sensor of mahjong machine mainboard input induced signal, also comprises alarm unit, on-off circuit and power sense circuit; Wherein the power output end of mahjong machine mainboard is powered to sensor by on-off circuit, and the first signal output of mahjong machine mainboard sends the first control signal to on-off circuit, then the conducting of on-off circuit control circuit or shutoff; The secondary signal output of mahjong machine mainboard sends the second control signal to power sense circuit simultaneously, the input voltage of power sense circuit detecting sensor, during short circuit sensor, power sense circuit just feeds back to the mahjong machine mainboard with the information that detects, and then the mahjong machine mainboard is crossed the first signal output with information exchange and sent the first control signal to on-off circuit.Wherein the first control signal and the second control signal come from the same signal output part of mahjong machine mainboard.
Wherein alarm unit is connected on the mahjong machine mainboard, and alarm unit comprises signal lamp and buzzer, and when on-off circuit received the first control signal disconnecting circuit, signal lamp and buzzer were started working, and provide alarm signal.Be provided with switch between buzzer and the mahjong machine mainboard, when the user receives the alarm signal of alarm unit, in order to avoid the sound that buzzer sends affects normal life, can turn-off buzzer by switch, and signal lamp keeps duty.
As shown in Figure 1, it is the sensor power supply that the mahjong machine mainboard is provided with second circuit, and circuit is provided with switch, closes a switch when needed, and the mahjong machine mainboard is the sensor power supply.This switch mostly is contact pin P can not conducting when occurring abnormal conditions in the circuit time, and available jumper cap connects contact pin P, and circuit system can be realized again the function of original circuit, temporarily recovers normal operation.
As shown in Figure 2, on-off circuit comprises: triode Q1, the first resistance R 1 and the second resistance R 2, wherein the colelctor electrode of triode Q1 is connected to mahjong machine motherboard power supply output, be used for conducting or the disconnection of control circuit, the emitter stage of triode Q1 is connected to the input of sensor, is used for powering to sensor; The first resistance R 1 is connected between the first signal output of the colelctor electrode of triode Q1 and mahjong machine mainboard; The second resistance R 2 is connected between the first signal output of the base stage of triode Q1 and mahjong machine mainboard.
Power sense circuit comprises: the first capacitor C 1, the 4th capacitor C 4, the 3rd resistance R 3 and the 4th resistance R 4, and wherein, the first capacitor C 1 is connected between triode Q1 emitter stage and the ground, and is parallel with the 4th capacitor C 4 on the first capacitor C 1; The 4th resistance R 4 and the first capacitor C 1 voltage that is used for by the current detection circuit that flows through circuit in parallel; The 3rd resistance R 3 is connected between mahjong machine mainboard and the triode Q1 emitter stage.
Operation principle in the utility model, as can be seen from Figure 2, the power supply VCC2 of sensor is subjected to control on the mahjong machine mainboard, when first signal output I/O1 output high level, triode Q1 cut-off, the sensor outage is not worked, when first signal output I/O1 output low level, triode Q1 conducting, sensor power source and mahjong machine mainboard power source are connected, working sensor.Secondary signal output I/O2 is detection port, when first signal output I/O1 output low level, and during working sensor, the software startup testing circuit, when secondary signal output I/O2 detects high level, normal operation of sensor.When secondary signal output I/O2 detects low level, short circuit sensor, this moment, mahjong machine in time made triode Q1 cut-off (first signal output I/O1 is high level), and sensor is not worked, and reaches the effect of protection system device with this.When mahjong machine is in the stage that sensor does not need work, make triode Q1 cut-off (first signal output I/O1 exports high level), sensor is not worked, and reaches the function that prolongs sensor life-time and save electric power with this.As shown in Figure 2, contact pin indication is arranged, when control circuit can't work because of device failure or other reason, available jumper cap connected contact pin, and circuit system can be realized again the function of original circuit, keeps normal operation.
The above only is better implementation example of the present utility model, is not limited to the utility model, and is all within the utility model spirit and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. mahjong machine with circuit protection function comprises the mahjong machine mainboard and to the sensor of described mahjong machine mainboard input induced signal, it is characterized in that, also comprises on-off circuit and power sense circuit;
The power output end of described mahjong machine mainboard is powered to described sensor by on-off circuit, and the first signal output of described mahjong machine mainboard sends the first control signal to on-off circuit;
Power sense circuit detects the input voltage of described sensor, during short circuit sensor, sends the first control signal by the mahjong machine mainboard to described on-off circuit.
2. the mahjong machine with circuit protection function according to claim 1 is characterized in that, described mahjong machine mainboard also is provided with for the secondary signal output that sends the second control signal to power sense circuit.
3. the mahjong machine with circuit protection function according to claim 1 is characterized in that, described first signal output and secondary signal output are same port.
4. the mahjong machine with circuit protection function according to claim 1 is characterized in that, the power output end of mahjong machine mainboard is also powered to sensor by second circuit, and this second circuit is provided with switch.
5. the mahjong machine with circuit protection function according to claim 3 is characterized in that, the switch on the described second circuit is contact pin.
6. the mahjong machine with circuit protection function according to claim 2 is characterized in that, described on-off circuit comprises:
Triode, the colelctor electrode of triode is connected to the power output end of mahjong machine mainboard, and the emitter stage of triode is connected to the input of sensor;
The first resistance, the first resistance are connected between the first signal output of the colelctor electrode of triode and described mahjong machine mainboard;
The second resistance, the second resistance are connected between the first signal output of the base stage of triode and described mahjong machine mainboard.
7. the mahjong machine with circuit protection function according to claim 6 is characterized in that, described power sense circuit comprises:
Be connected in parallel on the first electric capacity, the 4th electric capacity and the 4th resistance between described transistor emitter and the ground;
Be connected to the secondary signal output of described mahjong machine mainboard and the 3rd resistance between the transistor emitter.
8. the mahjong machine with circuit protection function according to claim 1 is characterized in that, described mahjong machine mainboard is connected with the alarm unit that triggered by described the first control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220315632 CN202654686U (en) | 2012-07-02 | 2012-07-02 | Mahjong machine with circuit protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220315632 CN202654686U (en) | 2012-07-02 | 2012-07-02 | Mahjong machine with circuit protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202654686U true CN202654686U (en) | 2013-01-09 |
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ID=47449627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220315632 Expired - Fee Related CN202654686U (en) | 2012-07-02 | 2012-07-02 | Mahjong machine with circuit protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202654686U (en) |
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2012
- 2012-07-02 CN CN 201220315632 patent/CN202654686U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20190702 |