Induction circuit structure and switch with induction circuit structure

Abstract

The utility model provides an induction circuit structure and a switch with the induction circuit structure. The switch comprises an indication unit and the induction circuit structure. The induction circuit structure comprises an induction unit and a driving control unit. The sensing unit is used for sensing approaching or leaving of a moving object relative to the switch and outputting a first control signal according to approaching of the moving object or outputting a second control signal according to leaving of the moving object; and the driving control unit is respectively connected with the indicating unit and the sensing unit and is used for receiving the first control signal or the second control signal and controlling the indicating unit to be turned on according to the first control signal or controlling the indicating unit to be turned off according to the second control signal. According to the scheme of the utility model, a user can turn on and turn off the LED indicating lamp arranged on the switch at any time according to personal use habits of the user, so that the switch realizes humanized response, and the switch is more energy-saving and environment-friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an induction circuit structure and a switch with the induction circuit structure. Background Art

[0002] Currently, for switches with indication functions on the market, when the switch turns off the load light, the LED indicator light remains on. This not only consumes electricity but also does not save energy. In addition, users cannot turn off the indicator light at will according to their usage habits.

[0003] Therefore, how to provide a sensing circuit structure and a switch having the sensing circuit structure to solve the defect that the existing switch with an indication function cannot turn off the indicator light at will according to usage habits, thereby causing power consumption and energy consumption, has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0004] The purpose of the utility model is to propose an inductive power structure, which enables users to control the LED indicator light on the switch at any time through non-contact control according to their personal usage habits, so that the switch can achieve humanized response and realize a single-live-wire micro-power circuit, which is more energy-saving and environmentally friendly.

[0005] On one hand, the utility model provides a sensing circuit structure, which is applied to a switch, wherein the switch includes an indicating unit, and is characterized in that the sensing circuit structure includes: a sensing unit and a driving control unit. The sensing unit is used to sense the approach or departure of a moving object relative to the switch, and outputs a first control signal according to the approach of the moving object or outputs a second control signal according to the departure of the moving object; the driving control unit connected to the indicating unit and the sensing unit respectively is used to receive the first control signal or the second control signal, and control the indicating unit to be turned on according to the first control signal, or control the indicating unit to be turned off according to the second control signal.

[0006] In another exemplary embodiment of the present invention, the induction circuit structure further comprises a rectifier unit. The rectifier unit is connected to the wiring terminals of the switch and is used to rectify the AC mains into pulsating DC power. The rectifier unit can improve the transmission and control efficiency of power in the switch.

[0007] In another exemplary embodiment of the present invention, the rectifier unit includes a rectifier bridge, wherein two input ends of the rectifier bridge are connected to the connection terminals of the switch. This structure can make the induction unit simple and easy to implement.

[0008] In another exemplary embodiment of the present invention, the sensing circuit structure further includes a first conversion unit. The first conversion unit is connected to the indicating unit and the rectifying unit, respectively, and is used to convert the pulsating direct current into low-voltage direct current to provide power for the indicating unit. The first conversion unit can provide a stable power supply for the entire sensing circuit structure.

[0009] In another exemplary embodiment of the utility model, the first conversion unit includes: a transformer subunit, a main control subunit, a power supply subunit, a feedback subunit, a current limiting subunit and a filter subunit. The transformer subunit is connected to the rectifier unit for transforming the pulsating direct current rectified by the rectifier unit; the main control subunit is connected to the transformer subunit for controlling the oscillation frequency of the transformer subunit; the power supply subunit is respectively connected to the transformer subunit and the main control subunit for supplying power to the main control subunit; the feedback subunit is respectively connected to the transformer subunit and the main control subunit for feeding back the output voltage of the transformer subunit to the main control subunit; the current limiting subunit is connected to the transformer subunit and the main control subunit for limiting the current flowing into the transformer subunit; and the filter subunit is connected to the transformer subunit and the feedback subunit for filtering the output current of the transformer subunit. This structure can improve the conversion efficiency of the power supply and reduce energy loss.

[0010] In another exemplary embodiment of the present invention, the transformer subunit includes a high-frequency transformer T1; the main control subunit includes a main control chip U3, and the main control chip U3 includes a power supply voltage pin VCC, a feedback pin FB, a current sampling pin CS, an input pin DRAIN and a ground pin GND; the power supply subunit includes a diode D6, a resistor R9 and a capacitor C9; the feedback subunit includes an optical coupler U4, a resistor R10, a voltage regulator diode ZD1, a resistor R11, a capacitor C8 and a resistor R8; the current limiting subunit includes a resistor R13; the filter subunit 146 includes a diode D5, a capacitor C1 and a capacitor C2; wherein one end of the primary winding of the high-frequency transformer T1 is connected to the output end of the rectifier bridge, and the other end of the primary winding is connected to the input pin DRAIN of the main control chip U3, one end of the auxiliary winding of the high-frequency transformer T1 is grounded, and the auxiliary winding is grounded. The other end of the auxiliary winding is connected to the positive electrode of the diode D6, one end of the secondary winding is connected to the positive electrode of the diode D5, the negative electrode of the diode D5 is connected to one end of the capacitor C1, the other end of the secondary winding is connected to the other end of the capacitor C1, the capacitor C1 is connected in parallel with the capacitor C2, one end of the capacitor C1 is also connected to the positive electrode of the diode of the optical coupler U4, the negative electrode of the diode of the optical coupler U4 is connected to one end of the resistor R11, the other end of the resistor R11 is grounded, the collector of the phototransistor of the optical coupler U4 is connected to the power supply voltage pin VCC of the main control chip U3, the emitter of the phototransistor of the optical coupler U4 is connected to the feedback pin FB of the main control chip U3, the capacitor C8 and the resistor R8 are connected in parallel and bridged between the emitter of the phototransistor of the optical coupler U4 and the ground terminal, one end of the resistor R13 is connected to the current sampling pin CS of the main control chip U3, and the other end of the resistor R13 is grounded. This structure can make the first conversion unit simple in structure and easy to implement.

[0011] In another exemplary embodiment of the present invention, the sensing circuit structure further includes a second conversion unit. The second conversion unit is connected to the sensing unit and the first conversion unit respectively, and is used to convert the output voltage of the first conversion unit into a voltage suitable for the sensing unit. The second conversion unit can ensure that a stable power supply is provided to the sensing unit.

[0012] In another exemplary embodiment of the utility model, the sensing unit includes a microwave sensor U2; the driving control unit includes a resistor R1, a resistor R6 and an NPN transistor Q2, wherein the input pin of the microwave sensor U2 is connected to the output end of the second conversion unit, the output pin of the microwave sensor U2 is connected to one end of the resistor R6, the other end of the resistor R6 is respectively connected to the base of the resistor R1 and the NPN transistor Q2, the emitter of the NPN transistor Q2 is grounded, and the collector of the NPN transistor Q2 is connected to the negative electrode of the indicating unit. This structure can make the sensing unit and the driving control unit simple in structure and easy to implement.

[0013] At the same time, the utility model also proposes a switch, on which the induction circuit structure arranged enables the user to control it non-contactly, and can turn on and off the LED indicator light arranged on the switch according to their personal usage habits, so that the switch can achieve humanized response, and the switch can realize a single-live-wire micro-power consumption circuit, which is more energy-saving and environmentally friendly.

[0014] Another aspect of the utility model provides a switch, the switch comprising: an indicating unit and the aforementioned sensing circuit structure, the sensing circuit structure being connected to the indicating unit.

[0015] In another exemplary embodiment of the present invention, the indicating unit is provided with three LED indicator lights, each of which is connected in parallel with a resistor. This structure can achieve compatibility between a one-position switch and a two-position switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following drawings are only used to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0017] Figure 1 This is a first exemplary structural diagram of the sensing circuit structure of the utility model.

[0018] Figure 2 This is a second exemplary structural diagram of the sensing circuit structure of the utility model.

[0019] Figure 3 The present invention is a circuit diagram of an implementation of the sensing circuit structure of the present invention.

[0020] The reference numerals are as follows:

[0021]

[0022] DETAILED DESCRIPTION

[0023] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings. The same reference numerals in the drawings represent components with the same structure or similar structures but the same functions.

[0024] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0025] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked.

[0026] In this article, "a" or "an" not only means "only one", but also means "more than one". In this article, "first", "second", etc. are only used to distinguish each other, rather than to indicate their importance and order.

[0027] In the existing switch with indication function, when the switch turns off the load light, the LED indicator light is still in a constant light state, which not only consumes power but also does not save energy, and the user cannot turn off the indicator light at will according to usage habits. In view of the above technical problems, the present application proposes an induction circuit structure 1 applied to a switch, and the switch includes an indication unit 10. In practical applications, the indication unit 10 is an indicator light or two or more indicator lights connected in series. Please refer to Figure 1 , which is a first exemplary structural diagram of the sensing circuit structure. Figure 1 As shown, the sensing circuit structure 1 includes a sensing unit 11 and a driving control unit 12. The driving control unit 12 is connected to the indicating unit 10 and the sensing unit 11 respectively.

[0028] The sensing unit 11 is used to sense the approach or departure of a moving object relative to the switch, and outputs a first control signal according to the approach of the moving object or outputs a second control signal according to the departure of the moving object. The drive control unit 12 is used to receive the first control signal or the second control signal, and control the indication unit 10 to turn on (in actual applications, the first control signal is a signal for controlling the indicator light to be turned on) according to the first control signal, or control the indication unit 10 to turn off (in actual applications, the second control signal is a signal for controlling the indicator light to be turned off) according to the second control signal. The sensing circuit structure provided in the present application enables users to control the LED indicator light on the switch at any time through non-contact control, and can turn on and off the LED indicator light on the switch according to their personal usage habits, so that the switch can achieve a humanized response, and the switch can achieve a single-live-wire micro-power circuit, which is more energy-saving and environmentally friendly.

[0029] In order to make the sensing unit structure simple and easy to implement, such as Figure 3 As shown, the sensing unit 11 described in this embodiment includes a microwave sensor U2. In practical applications, the working principle of the microwave sensor U2 is the Doppler effect principle, that is, when the microwave signal emitted by the transmitter encounters a stationary object, the signal will return with the same frequency phase; when the microwave signal emitted by the transmitter encounters a moving object, the frequency and phase of the signal will change. If the object moves toward the wave source, the wavelength of the reflected wave is shorter than the wavelength of the wave source, which means that the sensing result is that the moving object is close relative to the switch, and a first control signal corresponding to the sensing result that the moving object is close is output (in practical applications, the first control signal can be a high level). If the object moves in a direction away from the wave source, the wavelength of the reflected wave is longer than the wavelength of the wave source, which means that the sensing result is that the moving object is far away relative to the switch, and a second control signal corresponding to the sensing result that the moving object is far away is output (in practical applications, the second control signal can be a low level).

[0030] In order to make the structure of the drive control unit simple and easy to implement, such as Figure 3 As shown, the driving control unit 12 of this embodiment includes a resistor R1, a resistor R6 and an NPN transistor Q2. The output pin of the microwave sensor U2 is connected to one end of the resistor R6, the other end of the resistor R6 is connected to the resistor R1 and the base of the NPN transistor Q2 respectively, the emitter of the NPN transistor Q2 is grounded, and the collector of the NPN transistor Q2 is connected to the negative electrode of the indicating unit 10.

[0031] Specifically, when the microwave sensor senses that the moving object is approaching relative to the switch, a high level is output through the output pin of the microwave sensor, and the NPN transistor Q2 is controlled to be turned on after passing through the resistor R6 and the resistor R1, thereby controlling the indicator light to be lit. When the microwave sensor senses that the moving object is moving away relative to the switch, a low level is output through the output pin of the microwave sensor, and the NPN transistor Q2 is controlled to be turned off after passing through the resistor R6 and the resistor R1, thereby controlling the indicator light to be extinguished.

[0032] In order to improve the efficiency of power transmission and control in switches, such as Figure 2 As shown, the induction circuit structure 1 of this embodiment further includes a rectifier unit 13. The rectifier unit 13 is connected to the connection terminal of the switch. The rectifier unit 13 is used to rectify the AC mains into pulsating DC power.

[0033] In order to make the rectifying unit structure simple and easy to implement, the rectifying unit 13 includes a rectifying bridge BR, wherein two input ends of the rectifying bridge BR are connected to the connection terminals of the switch. Figure 3 As shown, the rectifier unit 13 includes rectifier bridges BR1 and BR2, and the A1 end and the L1 end are connected to the L11 and L12 connection terminals of the 1-position dual-control mechanical switch respectively. If the switch is a 2-position dual-control mechanical switch, then A1, L1; A2, L2 are connected to the L11, L12; L21, L22 connection terminals of the 2-position dual-control mechanical switch respectively.

[0034] In order to provide a stable power supply for the entire induction circuit structure, such as Figure 2 As shown, the sensing circuit structure 1 further includes a first conversion unit 14. The first conversion unit 14 is respectively connected to the indicating unit 10 and the rectifying unit 13. In this embodiment, the first conversion unit 14 is used to convert pulsating direct current into low-voltage direct current, for example, 12V direct current, so as to provide power for the indicating unit 10.

[0035] In order to improve the power conversion efficiency and reduce energy loss, continue to refer to Figure 2 The first conversion unit 14 includes: a transformer subunit 141, a main control subunit 142, a power supply subunit 143, a feedback subunit 144, a current limiting subunit 145 and a filtering subunit 146.

[0036] In this embodiment, the transformer subunit 141 connected to the rectifying unit 13 is used to transform the pulsating direct current rectified by the rectifying unit (13).

[0037] The main control subunit 142 connected to the transformer subunit 141 is used to control the oscillation frequency of the transformer subunit 141 .

[0038] The power supply subunit 143 connected to the voltage transformation subunit 141 and the main control subunit 142 respectively is used to supply power to the main control subunit 142 .

[0039] The feedback subunit 144 connected to the transformer subunit 141 and the main control subunit 142 respectively is used to feed back the output voltage of the transformer subunit 141 to the main control subunit 142, so as to detect whether the transformer subunit 141 is in an overvoltage or overload condition. If so, the main control subunit 142 performs overvoltage protection on the transformer subunit 141.

[0040] The current limiting subunit 145 connected to the transformer subunit 141 and the main control subunit 142 is used to limit the current flowing into the transformer subunit 141. In this embodiment, the maximum load capacity can be limited by the current limiting subunit 145.

[0041] The filter subunit 146 is connected to the transformer subunit 141 and the feedback subunit 144 and is used to filter the output current of the transformer subunit 141 .

[0042] In this embodiment, in order to make the structure of the first conversion unit simple and easy to implement, Figure 3As shown, the transformer subunit 141 includes a high-frequency transformer T1, the main control subunit 142 includes a main control chip U3, the main control chip U3 includes a power supply voltage pin VCC, a feedback pin FB, a current sampling pin CS, an input pin DRAIN and a ground pin GND, and the power supply subunit 143 includes a diode D6, a resistor R9 and a capacitor C9. The feedback subunit 144 includes an optical coupler U4, a resistor R10, a voltage zener diode ZD1, a resistor R11, a capacitor C8 and a resistor R8; the current limiting subunit 145 includes a resistor R13; the filter subunit 146 includes a diode D5, a capacitor C1 and a capacitor C2, wherein one end of the primary winding of the high-frequency transformer T1 is connected to the output end of the rectifier bridge BR, and the other end of the primary winding is connected to the input pin DRAIN of the main control chip U3, one end of the auxiliary winding of the high-frequency transformer T1 is grounded, and the other end of the auxiliary winding is connected to the positive electrode of the diode D6, one end of the secondary winding is connected to the positive electrode of the diode D5, the negative electrode of the diode D5 is connected to one end of the capacitor C1, and the other end of the secondary winding is connected to the positive electrode of the diode D5. The end is connected to the other end of the capacitor C1, the capacitor C1 is connected in parallel with the capacitor C2, one end of the capacitor C1 is also connected to the positive electrode of the diode of the optical coupler U4, the negative electrode of the diode of the optical coupler U4 is connected to one end of the resistor R11, the other end of the resistor R11 is grounded, the collector of the phototransistor of the optical coupler U4 is connected to the power supply voltage pin VCC of the main control chip U3, the emitter of the phototransistor of the optical coupler U4 is connected to the feedback pin FB of the main control chip U3, the capacitor C8 and the resistor R8 are connected in parallel and bridged between the emitter of the phototransistor of the optical coupler U4 and the ground end, one end of the resistor R13 is connected to the current sampling pin CS of the main control chip U3, and the other end of the resistor R13 is grounded.

[0043] To ensure a stable power supply to the sensor unit, continue to refer to Figure 2 The sensing circuit structure 1 of this embodiment further includes a second conversion unit 15. The second conversion unit 15 is respectively connected to the sensing unit 11, the first conversion unit 14 and the indication unit 10. The second conversion unit 15 is used to convert the output voltage of the first conversion unit 14 into a voltage suitable for the sensing unit 11, for example, converting 12V DC into 5V DC.

[0044] In order to minimize energy loss and maximize conversion efficiency during the conversion process, in practical applications, the second conversion unit 15 includes a power converter U1, a capacitor C3, and a capacitor C4. Figure 3 As described above, the output pin 3 of the power converter U1 is connected to the input pin 1 of the microwave sensor U2.

[0045] This embodiment also provides a switch, which includes an indicating unit 10 and the sensing circuit structure 1 as described above. Figure 1 As shown, the sensing circuit structure 1 is connected to the indicating unit 10 .

[0046] In practical applications, in order to be compatible with a one-position switch and a two-position switch, the indicating unit 10 is provided with three LED indicators, namely LED1, LED2 and LED3. Each of the LED indicators is connected in parallel with a resistor, such as Figure 3 As shown, resistors R1-R3 are flexibly matched. When the switch is a one-position switch, R2=R3=0Ω, R1 is not welded, and only LED1 can be lit. When the switch is a two-position switch, R2 and R3 are not welded, R1=0Ω, and LED2 and LED3 can be lit.

[0047] Therefore, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0048] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0049] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the utility model, and they are not used to limit the protection scope of the utility model. Any equivalent implementation scheme or changes that do not deviate from the technical spirit of the utility model, such as the combination, division or repetition of features, should be included in the protection scope of the utility model. The nouns and pronouns about people in this patent application are not limited to specific genders.

Claims

1. An induction circuit structure, applied to a switch, the switch comprising an indicating unit (10), characterized in that: The induction circuit structure comprises: a sensing unit (11) for sensing the approach or departure of a moving object relative to the switch, and outputting a first control signal according to the approach of the moving object or a second control signal according to the departure of the moving object; A drive control unit (12) is connected to the indicating unit (10) and the sensing unit (11) respectively, and is used to receive the first control signal or the second control signal, and control the indicating unit (10) to turn on according to the first control signal, or control the indicating unit (10) to turn off according to the second control signal.

2. The induction circuit structure according to claim 1, characterized in that: Also includes: A rectifying unit (13) is connected to the connection terminals of the switch and is used for rectifying the AC mains power into pulsating DC power.

3. The induction circuit structure according to claim 2, characterized in that: The rectifying unit (13) comprises a rectifying bridge (BR), wherein two input ends of the rectifying bridge (BR) are connected to the connection terminals of the switch.

4. The induction circuit structure according to claim 3, characterized in that: Also includes: A first conversion unit (14) is connected to the indicating unit (10) and the rectifying unit (13) respectively, and is used to convert pulsating direct current into low-voltage direct current to provide power for the indicating unit (10).

5. The induction circuit structure according to claim 4, characterized in that: The first conversion unit (14) comprises: a transformer subunit (141), connected to the rectifying unit (13), and used for transforming the pulsating direct current rectified by the rectifying unit (13); a main control subunit (142), connected to the voltage transformation subunit (141), and used to control the oscillation frequency of the voltage transformation subunit (141); a power supply subunit (143), connected to the voltage transformation subunit (141) and the main control subunit (142) respectively, and used for supplying power to the main control subunit (142); a feedback subunit (144), connected to the voltage transformation subunit (141) and the main control subunit (142) respectively, and used for feeding back the output voltage of the voltage transformation subunit (141) to the main control subunit (142); a current limiting subunit (145), connected to the voltage transformation subunit (141) and the main control subunit (142), and used for limiting the current flowing into the voltage transformation subunit (141); and A filtering subunit (146) is connected to the voltage transformation subunit (141) and the feedback subunit (144) and is used to filter the output current of the voltage transformation subunit (141).

6. The induction circuit structure according to claim 5, characterized in that: The transformer subunit (141) includes a high-frequency transformer (T1); The main control subunit (142) includes a main control chip (U3), and the main control chip (U3) includes a power supply voltage pin (VCC), a feedback pin (FB), a current sampling pin (CS), an input pin (DRAIN) and a ground pin (GND); The power supply unit (143) includes a diode (D6), a resistor (R9) and a capacitor (C9); The feedback subunit (144) includes an optical coupler (U4), a resistor (R10), a voltage regulator diode (ZD1), a resistor (R11), a capacitor (C8) and a resistor (R8); The current limiting subunit (145) includes a resistor (R13); The filter subunit (146) includes a diode (D5), a capacitor (C1) and a capacitor (C2); One end of the primary winding of the high-frequency transformer (T1) is connected to the output end of the rectifier bridge (BR), the other end of the primary winding is connected to the input pin (DRAIN) of the main control chip (U3), one end of the auxiliary winding of the high-frequency transformer (T1) is grounded, the other end of the auxiliary winding is connected to the positive electrode of the diode (D6), one end of the secondary winding is connected to the positive electrode of the diode (D5), the negative electrode of the diode (D5) is connected to one end of the capacitor (C1), the other end of the secondary winding is connected to the other end of the capacitor (C1), the capacitor (C1) is connected in parallel with the capacitor (C2), and one end of the capacitor (C1) is also connected to the positive electrode of the diode of the optical coupler (U4). The cathode of the diode of the optical coupler (U4) is connected to one end of the resistor (R11), the other end of the resistor (R11) is grounded, the collector of the phototransistor of the optical coupler (U4) is connected to the power supply voltage pin (VCC) of the main control chip (U3), the emitter of the phototransistor of the optical coupler (U4) is connected to the feedback pin (FB) of the main control chip (U3), the capacitor (C8) and the resistor (R8) are connected in parallel and bridged between the emitter of the phototransistor of the optical coupler (U4) and the grounding terminal, one end of the resistor (R13) is connected to the current sampling pin (CS) of the main control chip (U3), and the other end of the resistor (R13) is grounded.

7. The induction circuit structure according to claim 6, characterized in that: Also includes: A second conversion unit (15) is connected to the sensing unit (11) and the first conversion unit (14) respectively, and is used to convert the output voltage of the first conversion unit (14) into a voltage suitable for the sensing unit (11).

8. The induction circuit structure according to claim 7, characterized in that: The sensing unit (11) comprises a microwave sensor (U2); The driving control unit (12) comprises a resistor (R1), a resistor (R6) and an NPN transistor (Q2). The input pin of the microwave sensor (U2) is connected to the output end of the second conversion unit (15), the output pin of the microwave sensor (U2) is connected to one end of a resistor (R6), the other end of the resistor (R6) is respectively connected to the resistor (R1) and the base of an NPN transistor (Q2), the emitter of the NPN transistor (Q2) is grounded, and the collector of the NPN transistor (Q2) is connected to the negative electrode of the indicating unit (10).

9. A switch, characterized in that include: an indicating unit (10), and The sensing circuit structure (1) as claimed in any one of claims 1 to 8 is connected to the indicating unit (10).

10. The switch according to claim 9, characterized in that The indicating unit (10) is provided with three LED indicator lights. Each of the LED indicators is connected in parallel with a resistor.

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