CN201113954Y - Power failure self locking switch - Google Patents
Power failure self locking switch Download PDFInfo
- Publication number
- CN201113954Y CN201113954Y CNU2007200811806U CN200720081180U CN201113954Y CN 201113954 Y CN201113954 Y CN 201113954Y CN U2007200811806 U CNU2007200811806 U CN U2007200811806U CN 200720081180 U CN200720081180 U CN 200720081180U CN 201113954 Y CN201113954 Y CN 201113954Y
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- controllable silicon
- cathode
- switch
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- power failure
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Abstract
The utility model provides a power-off self-lock switch comprising a switch, a first resistor and a light bulb. The utility model is characterized in that: a control circuit of the power-off self-lock switch is provided with a thyristor, a cathode of the thyristor is connected with a cathode of a power supply through the light bulb, while an anode of the thyristor is connected with an anode of the power supply; a control electrode of the thyristor is connected with the cathode of the power supply through a fourth resistor; the cathode of the thyristor is connected with an anode of a diode, while a cathode of the diode is connected with an anode of a capacitor through a second resistor; a cathode of the capacitor is connected with a cathode of the power supply, while the anode of the capacitor is connected with the control electrode of the thyrsitor through a third resistor; and the switch and the first resistor are arranged between the anode of the power supply and the control electrode of the thyristor. The power-off self-lock switch has the characteristics of simple operation and wide practicality, and can be widely applied to switches of various electric appliances.
Description
Technical field
The utility model relates to a kind of switch, specifically, relates to a kind of power failure self-lock switch.
Background technology
In daily life; run into unexpected situation about having a power failure through regular meeting; this situation has not only been brought inconvenience to our life; if can not close the appliance switch that is using because of various reasons after having a power failure; the perhaps not anxious in fact appliance switch that is using of closing; after the power system restoration power supply; also can bring waste; even because the transient voltage of power supply beginning is too high; may damage electrical equipment; so, if the switch that can carry out self-locking behind a kind of the power failure can be arranged, the above-mentioned influence that brings that has a power failure so just can be avoided fully.
The utility model content
The problem that the utility model solved provides a kind of power failure self-lock switch, waste and the loss avoiding having a power failure and bring.
To achieve these goals, the utility model provides a kind of power failure self-lock switch, comprise switch, it is characterized in that, the control circuit of power failure self-lock switch is provided with a controllable silicon, the silicon controlled negative pole is connected with power cathode by bulb, the controllable silicon positive pole links to each other with positive source, the silicon controlled control utmost point links to each other with power cathode by the 4th resistance, the silicon controlled negative pole also links to each other with the positive pole of diode, the negative pole of diode links to each other with the positive pole of electric capacity by second resistance, the negative pole of electric capacity links to each other with power cathode, capacitance cathode also extremely links to each other with silicon controlled control by the 3rd resistance, and the switch and first resistance are arranged between the positive source and the silicon controlled control utmost point.
Described controllable silicon is a bidirectional triode thyristor.
Principle of the present utility model is to utilize the accumulate characteristic of electric capacity, provides trigger voltage to controllable silicon, makes the bulb operate as normal, work as temporary interruption, and capacitor discharge is when finishing, controllable silicon can not get trigger voltage and ends, cause bulb to extinguish, when power system restoration was powered, owing to there is not trigger voltage, controllable silicon was in cut-off state, bulb still keeps extinguishing state, have only and press switch once more, bulb could be lighted again, thereby has prevented the waste and the accident that cause because of recovery after power cut power supply effectively.
After below in conjunction with accompanying drawing, embodiment the utility model being described in detail, other characteristics of the present utility model, advantage will be more obvious.
Description of drawings
Accompanying drawing is a circuit structure diagram of the present utility model.
Embodiment
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
As accompanying drawing, the power failure self-lock switch, comprise switch 1, first resistance 2, bulb 3, it is characterized in that, the control circuit of power failure self-lock switch is provided with a controllable silicon 4, the negative pole of controllable silicon 4 is connected with power cathode by bulb 3, controllable silicon 4 positive poles link to each other with positive source, the control utmost point of controllable silicon 4 links to each other with power cathode by the 4th resistance 9, the silicon controlled negative pole also links to each other with the positive pole of diode 5, the negative pole of diode 5 links to each other with the positive pole of electric capacity 7 by second resistance 6, the negative pole of electric capacity 7 links to each other with power cathode, electric capacity 7 positive poles also extremely link to each other with the control of controllable silicon 4 by the 3rd resistance 8, and the switch 1 and first resistance 2 are arranged between the control utmost point of positive source and controllable silicon 4.
Connect each electric elements by accompanying drawing.Circuit connect finish after, after the Closing Switch 1, first resistance 2 and the 4th resistance 9 dividing potential drops, controllable silicon 4 conducting that is triggered, bulb is lighted; After switch 1 disconnected, controllable silicon 4 changed by second resistance 6, the 3rd resistance 8, diode 5 loops and continues triggering and conducting, and electric capacity 7 is kept trigger voltage, guarantees all can make controllable silicon 4 conductings in the voltage positive-negative half-cycle.Have a power failure when electrical network is unexpected, after promptly power supply was disconnected, electric capacity 7 was through the 3rd resistance 8 and 9 discharges of the 4th resistance, up to discharge off.Because capacitor discharge finishes, again can not be for controllable silicon 4 provide trigger voltage, when electrical network restored electricity once more, controllable silicon was not owing to there is trigger voltage, and was in cut-off state, and bulb can not be worked.If light bulb again, must press switch 1 once more, thereby prevent the waste and the device damage that cause because of recovery after power cut power supply effectively.
This switching circuit can use on various appliance switches, has advantage simple to operate, inexpensive, has practicality very widely.
Claims (2)
1. power failure self-lock switch, comprise switch (1), it is characterized in that, the control circuit of power failure self-lock switch is provided with a controllable silicon (4), the negative electrode of controllable silicon (4) is connected with power cathode by bulb (3), controllable silicon (4) anode links to each other with positive source, the control utmost point of controllable silicon (4) links to each other with power cathode by the 4th resistance (9), the silicon controlled negative electrode also links to each other with the positive pole of diode (5), the negative pole of diode (5) links to each other with the positive pole of electric capacity (7) by second resistance (6), the negative pole of electric capacity (7) links to each other with power cathode, electric capacity (7) positive pole also extremely links to each other with the control of controllable silicon (4) by the 3rd resistance (8), and switch (1) and first resistance (2) are arranged between the control utmost point of positive source and controllable silicon (4).
2. power failure self-lock switch according to claim 1 is characterized in that, described controllable silicon (4) is a bidirectional triode thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200811806U CN201113954Y (en) | 2007-09-21 | 2007-09-21 | Power failure self locking switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200811806U CN201113954Y (en) | 2007-09-21 | 2007-09-21 | Power failure self locking switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201113954Y true CN201113954Y (en) | 2008-09-10 |
Family
ID=39965702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200811806U Expired - Fee Related CN201113954Y (en) | 2007-09-21 | 2007-09-21 | Power failure self locking switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201113954Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410060A (en) * | 2014-11-05 | 2015-03-11 | 苏州华之杰电讯有限公司 | Control circuit of single-phase alternating-current motor |
-
2007
- 2007-09-21 CN CNU2007200811806U patent/CN201113954Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410060A (en) * | 2014-11-05 | 2015-03-11 | 苏州华之杰电讯有限公司 | Control circuit of single-phase alternating-current motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |