CN211743005U

CN211743005U - Self-locking three-state indicating button

Info

Publication number: CN211743005U
Application number: CN202020459848.1U
Authority: CN
Inventors: 杨家凯; 杨春欢; 何亮; 杨寿源; 王明江; 韩广宇; 耿成通; 侯诗; 杨克虎; 余方强; 贾慧; 施辉选; 徐仕林; 朱晓丽; 何楚平; 卯明旺; 朱一昕; 何颖; 高红英; 张世才
Original assignee: Chuxiong Power Supply Bureau of Yunnan Power Grid Co Ltd
Current assignee: Chuxiong Power Supply Bureau of Yunnan Power Grid Co Ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-10-23
Anticipated expiration: 2030-04-01

Abstract

The utility model relates to a three state indicator button of auto-lock. The self-locking three-state indicating button comprises a self-locking button AN, a current transformer TA, a first indicating lamp LED1, a second indicating lamp LED2, a first current-limiting control circuit, a second current-limiting control circuit and a second diode D21. This three state indicator button of auto-lock has closed self-locking function, overcurrent disconnection function, circuit operating condition indicating function, press the line simply, do not divide polarity, the consumption is little, the energy consumption is extremely low, can improve the assembly benefit of relevant electronic product, can reduce control panel's size by a wide margin, be convenient for small volume more, more economic system control, be white when electroless, it is normal for red instruction power supply when having the disconnection of electric button, the button is closed, when the load overcurrent exceedes 30mA, green lamp is bright in the button, it has the load of normal work to express that the switch circuit.

Description

Self-locking three-state indicating button

Technical Field

The utility model relates to a three state indicator button of auto-lock belongs to electron, household electrical appliances technical field.

Background

When electronic products and household electrical appliances are installed, a power supply indicator light is additionally arranged on a circuit board, and the indicator light is turned on or off, so that the operation is troublesome. In addition, switches with power indicator lamps and working status indicator lamps are multi-line, so that the installation is troublesome, the working efficiency of electronic products with the multi-line indicator lamps is low when the electronic products are assembled, and the universality of the multi-line power indicator lamps is poor, so that the electronic products, the power supplies of household appliances and the working status indicator lamps with small volumes and universality need to be invented. The device is used in an industrial control system, can greatly reduce the size of a control panel, is more convenient for small-size and more economic system control, can obviously reduce the cost of electric power engineering and automation engineering projects, and obviously improves economic benefits.

Disclosure of Invention

In view of the above, the present invention is directed to solving the above-described problems. It is an object of the present invention to provide a self-locking tri-state indicating button that solves the above problems. The utility model discloses have closed self-locking function, overflow the disconnection function, circuit operating condition indicating function, can reduce control panel's size by a wide margin, be convenient for more small, more economic system control.

The utility model adopts the technical scheme that: a self-locking three-state indicating button comprises a self-locking button AN, a current transformer TA, a first indicating lamp LED1, a second indicating lamp LED2, a first current-limiting control circuit, a second current-limiting control circuit and a second diode D21; the first end of the self-locking button AN is connected with the first end of a first current-limiting control circuit and used as the input end or the output end of the self-locking three-state indicating button, the second end of the first current-limiting control circuit is connected with the first end of a first indicator light LED1, the second end of a first indicator light LED1 is simultaneously connected with the second end of the self-locking button AN, the first end of a current transformer TA, the first end of a second diode D21 and the first end of a second indicator light LED2, and the second end of the current transformer TA is simultaneously connected with the second end of a second diode D21 and the first end of a second current-limiting control circuit and used as the input end or the output end of the self-locking three-state indicating button; a second terminal of the second current limit control circuit is connected to a second terminal of a second indicator light LED 2.

Further, the first current-limiting control circuit comprises a first resistor R1, a first diode D1; the first end of the first diode D1 is connected with the first end of the self-locking button AN, the second end of the first diode D1 is connected with the first end of the first resistor R1, and the second end of the first resistor R1 is connected with the first end of the first indicator light LED 1.

Further, the second current-limiting control circuit comprises a second resistor R2, a triode T and a light-emitting diode D22; the first end of the second resistor R2 is connected to the second end of the second diode D21, the first end of the light emitting diode D22 and the collector of the triode T, the second end of the light emitting diode D22 is connected to the base of the triode T, the emitter of the triode T is connected to the second end of the second indicator light LED2, and the second end of the second resistor R2 is connected to the first end of the second indicator light LED 2.

Further, the first indicator light LED1 is used for power indication, the second indicator light LED2 is used for load current indication, and the second diode D21 is used as a diode for preventing the TA secondary negative half cycle from being opened.

The utility model has the advantages that: the utility model discloses have closed self-locking function, overflow the disconnection function, circuit operating condition instruction function, according to the line simple, do not divide polarity, the consumption is little, the energy consumption is extremely low, can improve the assembly benefit of relevant electronic product, can reduce control panel's size by a wide margin, be convenient for more small, more economic system control.

Other characteristic features and advantages of the invention will become apparent from the following description of exemplary embodiments, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the invention. For a person skilled in the art, other figures can be derived from these figures without inventive effort.

Fig. 1 exemplarily shows a schematic structural view of the self-locking three-state indicating button of the present invention;

fig. 2 is a schematic diagram illustrating an application of the switch button of the present invention to an electrical device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The following describes the self-locking tri-state indicating button provided by the present invention in detail with reference to the attached drawings.

The utility model discloses three state indicator button has closed self-locking function, overflows the disconnection function, and circuit operating condition instruction function. Fig. 1 is a schematic structural diagram of AN embodiment of the self-locking three-state indicating button, and referring to fig. 1, the self-locking three-state indicating button includes a self-locking button AN, a current transformer TA, a first indicator light LED1, a second indicator light LED2, a first current-limiting control circuit, a second current-limiting control circuit, and a second diode D21; the first end of the self-locking button AN is connected with the first end of a first current-limiting control circuit and used as the input end or the output end of the self-locking three-state indicating button, the second end of the first current-limiting control circuit is connected with the first end of a first indicator light LED1, the second end of a first indicator light LED1 is simultaneously connected with the second end of the self-locking button AN, the first end of a current transformer TA, the first end of a second diode D21 and the first end of a second indicator light LED2, and the second end of the current transformer TA is simultaneously connected with the second end of a second diode D21 and the first end of a second current-limiting control circuit and used as the input end or the output end of the self-locking three-state indicating button; a second terminal of the second current limit control circuit is connected to a second terminal of a second indicator light LED 2.

Specifically, the first current-limiting control circuit comprises a first resistor R1 and a first diode D1; the first end of the first diode D1 is connected with the first end of the self-locking button AN, the second end of the first diode D1 is connected with the first end of the first resistor R1, and the second end of the first resistor R1 is connected with the first end of the first indicator light LED 1.

Specifically, the second current-limiting control circuit comprises a second resistor R2, a triode T, and a light-emitting diode D22; the first end of the second resistor R2 is connected to the second end of the second diode D21, the first end of the light emitting diode D22 and the collector of the triode T, the second end of the light emitting diode D22 is connected to the base of the triode T, the emitter of the triode T is connected to the second end of the second indicator light LED2, and the second end of the second resistor R2 is connected to the first end of the second indicator light LED 2.

Specifically, the first indicator light LED1 is used for power indication, the second indicator light LED2 is used for load current indication, and the second diode D21 is used as a diode for preventing the TA secondary negative half cycle from being opened.

The utility model discloses a theory of operation is:

when the button AN is off, power passes through L (live line) → D1 → R1 → LED1 → TA → load → N (neutral line), and since R1 is large, a slight current flows through the LED1, and the LED1 emits red light (indicating that the power is on and the load is red when off).

When button AN is on, LED1 is off with no voltage, and a current is carried through the primary side of transformer TA, producing a current on the secondary side of TA. When the current is negative for half a cycle, the current is from TA → K2 → R2 → LED2 → K1 → TA, and the LED2 emits green light, and at this time, the two-color LED only emits green light (indicating that the power supply is electrified and the load is on, and when the load current is more than 30mA, the LED emits green light). If the TA secondary current is large, a current Ib is added to the b pole of the transistor T through D22 (actually, a green light emitting diode), and since a large current β × Ib flows through the c pole of the transistor, the excessive current is prevented from flowing through the LED2 and burning out. The maximum operating current of the LED2 was calculated as 10mA, and R2 was 56 Ω.

When button AN is on, LED1 is off with no voltage, and a current is carried through the primary side of transformer TA, producing a current on the secondary side of TA. When the current is in the positive cycle, the current flows back to the current transformer from TA → K2 → D2 → K1 → TA.

The diode D21 is used to prevent high voltage breakdown of transistor T or damage to green diode LED2 caused by open circuit during the negative half cycle of the secondary side of current transformer TA.

The TA transformation ratio of the current transformer is 10A/10mA, and when the TA primary side current reaches 30mA, the LED2 starts to emit green light.

Illustratively, the resistor R1 is a 2.7M Ω and the D1 is a 1N4007 diode. T is an 8050NPN triode. D22 and LED2 are the same type green LED. LED1 was a high bright red LED and LED2 was a green LED, with an initial light emission current of 10 uA. In fig. 1, J1 and J2 can be binding screws.

The utility model discloses three state indicator button has closed self-locking function, overflows the disconnection function, and circuit operating condition instruction function. The button is white when no electricity is available, red when the electricity button is disconnected indicates that the power supply is normal, the button is closed, and when the load overcurrent exceeds 30mA, a green light in the button is on, which indicates that the switch loop has a load for normal operation.

The above-described embodiments can be implemented individually or in various combinations, and such variations are within the scope of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the term "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional like elements in the article or device comprising the element.

The above embodiments are merely for illustrating the technical solutions of the present invention and are not to be construed as limiting, and the present invention is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that various modifications and equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all the modifications and equivalents should be covered by the scope of the claims of the present invention.

Claims

1. A self-locking three-state indicating button is characterized in that: the current transformer comprises a self-locking button AN, a current transformer TA, a first indicator light LED1, a second indicator light LED2, a first current-limiting control circuit, a second current-limiting control circuit and a second diode D21; the first end of the self-locking button AN is connected with the first end of a first current-limiting control circuit and used as the input end or the output end of the self-locking three-state indicating button, the second end of the first current-limiting control circuit is connected with the first end of a first indicator light LED1, the second end of a first indicator light LED1 is simultaneously connected with the second end of the self-locking button AN, the first end of a current transformer TA, the first end of a second diode D21 and the first end of a second indicator light LED2, and the second end of the current transformer TA is simultaneously connected with the second end of a second diode D21 and the first end of a second current-limiting control circuit and used as the input end or the output end of the self-locking three-state indicating button; a second terminal of the second current limit control circuit is connected to a second terminal of a second indicator light LED 2.

2. The self-latching tri-state indicator button of claim 1, wherein: the first current limiting control circuit comprises a first resistor R1 and a first diode D1; the first end of the first diode D1 is connected with the first end of the self-locking button AN, the second end of the first diode D1 is connected with the first end of the first resistor R1, and the second end of the first resistor R1 is connected with the first end of the first indicator light LED 1.

3. The self-latching tri-state indicator button of claim 1, wherein: the second current-limiting control circuit comprises a second resistor R2, a triode T and a light-emitting diode D22; the first end of the second resistor R2 is connected to the second end of the second diode D21, the first end of the light emitting diode D22 and the collector of the triode T, the second end of the light emitting diode D22 is connected to the base of the triode T, the emitter of the triode T is connected to the second end of the second indicator light LED2, and the second end of the second resistor R2 is connected to the first end of the second indicator light LED 2.

4. The self-latching tri-state indicator button of claim 1, wherein: the first indicator light LED1 is used for power indication, the second indicator light LED2 is used for load current indication, and the second diode D21 is used as a diode for preventing the open circuit of the TA secondary negative half cycle.