CN202678937U - Overcurrent protection device of automatic mahjong machine - Google Patents
Overcurrent protection device of automatic mahjong machine Download PDFInfo
- Publication number
- CN202678937U CN202678937U CN 201220359821 CN201220359821U CN202678937U CN 202678937 U CN202678937 U CN 202678937U CN 201220359821 CN201220359821 CN 201220359821 CN 201220359821 U CN201220359821 U CN 201220359821U CN 202678937 U CN202678937 U CN 202678937U
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- power supply
- automatic mahjong
- motor driving
- protection device
- overcurrent protection
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an overcurrent protection device of an automatic mahjong machine. The overcurrent protection device comprises a singlechip and a motor driving power supply, wherein the singlechip comprises an I/O interface, the I/O interface is connected with the motor driving power supply through a detecting resistor, the detecting resistor is arranged between the I/O interface of the singlechip and the motor driving power supply, one resistor is used for detecting motor driving current of the automatic mahjong machine, and the singlechip detects a signal and automatically closes the motor driving power supply once the current exceeds a limited range to protect the mainboard. As the mainboard is protected in a limiting way, the service life of the device is prolonged and the maintenance cost is saved.
Description
Technical field
The utility model relates to the overcurrent protective device of a kind of automatic mahjong-playing machine, particularly a kind of automatic mahjong-playing machine.
Background technology
Along with people's growth in the living standard, play a kind of mode that mahjong has become people's amusement, playing in the past mahjong all is manually to shuffle, since automatic mahjong-playing machine has been arranged, for the people who plays mahjong provides many convenience.Present existing automatic mahjong-playing machine does not detect control to motor drive current usually, when occuring, electrical fault easily cause the wire-wound resistor in the mainboard to generate heat, the serious mainboard motor damage on fire that causes affects automatic mahjong-playing machine and normally uses, and causes heavy losses.
Summary of the invention
Technical problem to be solved by this invention is, a kind of overcurrent protective device of simple, reliable, practical, economic automatic mahjong-playing machine.
For solving the problems of the technologies described above; the present invention is by the following technical solutions: a kind of overcurrent protective device of automatic mahjong-playing machine; include single-chip microcomputer, motor drive power supply, described single-chip microcomputer includes the I/O mouth, it is characterized in that being connected by detecting resistance between described I/O mouth and the motor drive power supply.
As a kind of improvement, detecting resistance is between 0.5 megaohm to 4 megaohm.
As a kind of improvement, motor drive power supply is for exchanging 110 volts.
The utility model arranges detection resistance between the I/O of single-chip microcomputer mouth and motor drive power supply; adopt a resistance mode to detect the automatic mahjong-playing machine motor drive current; electric current surpasses the limited range single-chip microcomputer and detects the Automatic shutting-down of signal motor-driven; play the effect of protection mainboard; increase product useful life, saved maintenance cost.
Description of drawings
Fig. 1 is circuit connection structure figure of the present utility model.
Fig. 2 is the waveform schematic diagram of current detecting of the present utility model when normal.
Fig. 3 is the waveform schematic diagram of current detecting of the present utility model when excessive.
Fig. 4 is control flow chart of the present utility model.
Embodiment
Such as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4; a kind of embodiment of automatic mahjong-playing machine electric control gear; a kind of overcurrent protective device of automatic mahjong-playing machine; include single-chip microcomputer 1, motor drive power supply; described single-chip microcomputer 1 includes the I/O mouth, is connected by detecting resistance R 2 between described I/O mouth and the motor drive power supply.Single-chip microcomputer 1 control electric machine rotation is crossed the electric current increase that detects resistance R 2 when exception stream appears in motor, and AC signal mainboard single-chip I/O mouth detects over the ground voltage amplitude and becomes greatly as shown in Figure 3.It is high level that the mainboard single-chip I/O mouth detects 2V above, 0.8V below be low level, in detecting mainboard single-chip I/O mouth signal 20ms, single-chip microcomputer once detects low level, and continuous detecting is repeatedly, detecting low level, then to regard as electric current excessive, single-chip microcomputer disable motor and alarm.
A kind of preferred embodiment, described detection resistance R 2 is between 0.5 megaohm to 4 megaohm, above-mentioned resistance value can play the effect of protection mainboard, increases product useful life, has saved maintenance cost.
A kind of preferred embodiment, described detection resistance R 2 is 1 megaohm, result of use is good.
A kind of preferred embodiment, motor drive power supply is for exchanging 110 volts.
Claims (5)
1. the overcurrent protective device of an automatic mahjong-playing machine includes single-chip microcomputer (1), motor drive power supply, and described single-chip microcomputer (1) includes the I/O mouth, it is characterized in that being connected by detecting resistance (R2) between described I/O mouth and the motor drive power supply.
2. the overcurrent protective device of automatic mahjong-playing machine according to claim 1 is characterized in that described detection resistance (R2) is between 0.5 megaohm to 4 megaohm.
3. the overcurrent protective device of automatic mahjong-playing machine according to claim 2 is characterized in that described detection resistance (R2) is 1 megaohm.
4. the overcurrent protective device of automatic mahjong-playing machine according to claim 1 and 2 is characterized in that motor drive power supply is to exchange 110 volts.
5. the overcurrent protective device of automatic mahjong-playing machine according to claim 3 is characterized in that motor drive power supply is to exchange 110 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220359821 CN202678937U (en) | 2012-07-24 | 2012-07-24 | Overcurrent protection device of automatic mahjong machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220359821 CN202678937U (en) | 2012-07-24 | 2012-07-24 | Overcurrent protection device of automatic mahjong machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202678937U true CN202678937U (en) | 2013-01-16 |
Family
ID=47499812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220359821 Expired - Fee Related CN202678937U (en) | 2012-07-24 | 2012-07-24 | Overcurrent protection device of automatic mahjong machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202678937U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103785165A (en) * | 2013-12-25 | 2014-05-14 | 阳琳 | Anti-blocking flush door device for automatic mahjong machine and operating method of anti-blocking flush door device |
| CN105879383A (en) * | 2014-11-03 | 2016-08-24 | 韦琳 | Mahjong machine fault analyzing and alarming method |
-
2012
- 2012-07-24 CN CN 201220359821 patent/CN202678937U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103785165A (en) * | 2013-12-25 | 2014-05-14 | 阳琳 | Anti-blocking flush door device for automatic mahjong machine and operating method of anti-blocking flush door device |
| CN103785165B (en) * | 2013-12-25 | 2016-05-18 | 阳琳 | A kind of anti-card vertical hinged door device and method of work of automatic mahjong-playing machine |
| CN105879383A (en) * | 2014-11-03 | 2016-08-24 | 韦琳 | Mahjong machine fault analyzing and alarming method |
| CN105879383B (en) * | 2014-11-03 | 2020-12-22 | 韦琳 | Mahjong machine fault analysis alarm method and control circuit applied by same |
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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 |
Granted publication date: 20130116 Termination date: 20210724 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |