CN104809830A - Wireless remote-control doorbell - Google Patents
Wireless remote-control doorbell Download PDFInfo
- Publication number
- CN104809830A CN104809830A CN201510239695.3A CN201510239695A CN104809830A CN 104809830 A CN104809830 A CN 104809830A CN 201510239695 A CN201510239695 A CN 201510239695A CN 104809830 A CN104809830 A CN 104809830A
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- Prior art keywords
- doorbell
- circuit
- frequency
- triode
- wireless
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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.)
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Abstract
The invention discloses a wireless remote-control doorbell. The wireless remote-control doorbell comprises a wireless emitting unit and a wireless receiving unit, wherein the wireless emitting unit is mounted outdoors; the wireless receiving unit is mounted indoors; a distance between the wireless emitting unit and the wireless receiving unit is between 10 m and 20 m; the wireless emitting unit comprises a doorbell micro-switch, a modulating and oscillating circuit and a high-frequency oscillating circuit; the doorbell micro-switch is connected with a trigger end of the modulating and oscillating circuit; an output end of the modulating and oscillating circuit is connected with an input end of the high-frequency oscillating circuit, and an output end of the high-frequency oscillating circuit is used as an output end of the wireless emitting unit for sending a doorbell signal to the wireless receiving unit; the wireless receiving unit comprises a super-regenerative oscillating and receiving circuit, a signal amplifying circuit, a frequency-selecting and shaping circuit, a voice chip, a push-pull power amplifying circuit and a loudspeaker which are connected in sequence. According to the wireless remote-control doorbell, the wireless control of the doorbell is realized, and the doorbell is simple in circuit, easy to realize, convenient to use, high in stability and good in application prospect.
Description
Technical field
The present invention relates to a kind of doorbell, be specifically related to a kind of wireless remote control doorbell.
Background technology
Along with radio plays an important role in our life, the raising of people's living standard and the improvement of living environment, people are also day by day urgent to the requirement of intelligent residential area type.At present, no matter be in city or rural area, present people also more and more like inhabitation big house, but because of between residential houses away from front door, and, the doorbell that front door is installed is for there being Line Doorbell, and distant between residential houses, when messenger knocks at the door or ring a doorbell, people are not easy to hear, not only awkward, the more important thing is and often delay thing, it is very inconvenient to use.
Summary of the invention
Technical matters solved by the invention be the doorbell installed of front door for there being Line Doorbell, distant between residential houses, when messenger knocks at the door or ring a doorbell, people are not easy to hear, often delay thing, use very inconvenient problem.Wireless remote control doorbell of the present invention, comprise wireless transmitting unit and radio receiving unit, wireless transmitting unit is arranged on open air, and radio receiving unit is arranged on indoor, and the distance between wireless transmitting unit and radio receiving unit is between 10-20m, realize the controlled in wireless of doorbell, circuit is simple, easily realizes, easy to use, stability is high, has a good application prospect.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of wireless remote control doorbell, it is characterized in that: comprise wireless transmitting unit and radio receiving unit, described wireless transmitting unit is arranged on open air, and described radio receiving unit is arranged on indoor, distance between described wireless transmitting unit and radio receiving unit is between 10-20m
Described wireless transmitting unit comprises doorbell microswitch, modulation oscillator circuit, high-frequency oscillating circuits, described doorbell microswitch is connected with the trigger end of modulation oscillator circuit, the output terminal of described modulation oscillator circuit is connected with the input end of high-frequency oscillating circuits, and the output terminal of described high-frequency oscillating circuits sends doorbell signal as the output terminal of wireless transmitting unit to radio receiving unit;
Described radio receiving unit comprises the superregeneration vibration receiving circuit, signal amplification circuit, frequency-selecting shaping circuit, speech chip, push-pull power amplifier circuit and the loudspeaker that are connected successively, and the input end of described superregeneration vibration receiving circuit receives wireless transmitting unit as the input end of radio receiving unit and sends doorbell signal.
Aforesaid a kind of wireless remote control doorbell, it is characterized in that: described modulation oscillator circuit comprises TC4069UBP integrated chip and crystal oscillator X1, described crystal oscillator X1 provides oscillation source for TC4069UBP integrated chip, the trigger end of described TC4069UBP integrated chip is connected with one end of doorbell microswitch with by resistance R4, the external power supply of the other end of described doorbell microswitch, the oscillator signal output terminal of described TC4069UBP integrated chip is connected with the input end of high-frequency oscillating circuits;
Described high-frequency oscillating circuits comprises launches triode Q1, printed inductance L1, transmitting indicating lamp D1, electric capacity C1, collector junction capacitance C2 and electric capacity C3, the oscillator signal output terminal of described TC4069UBP integrated chip respectively with the base stage of launching triode Q1, emitter is connected, the base stage of described transmitting triode Q1 is also connected as electric capacity C1, the base stage of described transmitting triode Q1 is also connected with one end of printed inductance L1 by resistance R1, the collector of described transmitting triode Q1 is connected with the other end of printed inductance L1, described collector junction capacitance C2 is connected in parallel on the collector launching triode Q1, described electric capacity C3 is connected in parallel on the two ends of printed inductance L1, described printed inductance L1 is also connected with the positive pole of transmitting indicating lamp D1 by resistance R3, described printed inductance L1 is also connected with one end of doorbell microswitch, described printed inductance L1 is for generation of electromagnetic wave, send doorbell signal.
Aforesaid a kind of wireless remote control doorbell, is characterized in that: the oscillation frequency of described crystal oscillator X1 is 32.768kHz.
Aforesaid a kind of wireless remote control doorbell, it is characterized in that: described superregeneration vibration receiving circuit comprises triode Q3, coil inductance L2, colour loop inductance L3, electric capacity C4, electric capacity C16, described coil inductance L2 is as the receiving element of superregeneration vibration receiving circuit, the doorbell signal that resonance sends for receiving printed inductance L1 is produced with printed inductance L1, one end of described coil inductance L2 is connected with the collector of triode Q3, described electric capacity C16 is connected in parallel on the two ends of coil inductance L2, described colour loop inductance L3 is connected with the emitter of triode Q3, described electric capacity C4 is connected in parallel on the emitter of triode Q3, between collector, the base stage of described triode Q3 as the output terminal of superregeneration vibration receiving circuit by being connected with signal amplification circuit after resistance R14 step-down,
Described signal amplification circuit comprises integrated amplification chip TC4069, the input end of described integrated amplification chip TC4069 is in series with electric capacity C7, resistance R5, described resistance R5 is connected with resistance R14, described integrated amplification chip TC4069 is three grades of high-gain amplifiers, the modulation signal that the receiving circuit that superregeneration vibrated exports amplifies, the output terminal of described integrated amplification chip TC4069 is connected with the input end of frequency-selecting shaping circuit as the output terminal of signal amplification circuit, the filter capacitor C8 filtered for high frequency spurs is also parallel with between second level amplification place of described integrated amplification chip TC4069 and third level amplification place,
Described frequency-selecting shaping circuit comprises frequency-selecting crystal oscillator X2, shaping triode Q2, described frequency-selecting crystal oscillator X is connected with the output terminal of signal amplification circuit, for passing through the identical modulation signal of frequency, described frequency-selecting crystal oscillator X is connected with the base stage of shaping triode Q2, and the collector of described shaping triode Q2 is connected with the input end of speech chip as the output terminal of frequency-selecting shaping circuit;
The output terminal of described speech chip is connected with loudspeaker by push-pull power amplifier circuit, and described speech chip is TQ33G chip.
Aforesaid a kind of wireless remote control doorbell, is characterized in that: described coil inductance L2 coiling on the skeleton of diameter 5mm, and enclosing around 3 with the enameled wire of 0.51mm, is copper core in the middle of described skeleton.
Aforesaid a kind of wireless remote control doorbell, is characterized in that: the oscillation frequency of described frequency-selecting crystal oscillator X2 is 32.768kHz.
Aforesaid a kind of wireless remote control doorbell, is characterized in that: be provided with music type selector switch SW2 between described speech chip and frequency-selecting shaping circuit.
The invention has the beneficial effects as follows: wireless remote control doorbell of the present invention, comprise wireless transmitting unit and radio receiving unit, wireless transmitting unit is arranged on open air, and radio receiving unit is arranged on indoor, and the distance between wireless transmitting unit and radio receiving unit is between 10-20m, realize the controlled in wireless of doorbell, circuit is simple, easily realizes, easy to use, stability is high, has a good application prospect.
Accompanying drawing explanation
Fig. 1 is the system chart of wireless remote control doorbell of the present invention.
Fig. 2 is the circuit diagram of modulation oscillator circuit of the present invention.
Fig. 3 is the circuit diagram of radio receiving unit of the present invention.
Embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
As shown in Figure 1, wireless remote control doorbell of the present invention, comprise wireless transmitting unit and radio receiving unit, described wireless transmitting unit is arranged on open air, radio receiving unit is arranged on indoor, distance between wireless transmitting unit and radio receiving unit is between 10-20m, realize the controlled in wireless of doorbell, easy to use, described wireless transmitting unit comprises doorbell microswitch, modulation oscillator circuit, high-frequency oscillating circuits, described doorbell microswitch is connected with the trigger end of modulation oscillator circuit, the output terminal of described modulation oscillator circuit is connected with the input end of high-frequency oscillating circuits, the output terminal of described high-frequency oscillating circuits sends doorbell signal as the output terminal of wireless transmitting unit to radio receiving unit,
Described radio receiving unit comprises the superregeneration vibration receiving circuit, signal amplification circuit, frequency-selecting shaping circuit, speech chip, push-pull power amplifier circuit and the loudspeaker that are connected successively, and the input end of described superregeneration vibration receiving circuit receives wireless transmitting unit as the input end of radio receiving unit and sends doorbell signal.
As shown in Figure 2, described modulation oscillator circuit comprises TC4069UBP integrated chip and crystal oscillator X1, crystal oscillator X1 provides oscillation source for TC4069UBP integrated chip, the trigger end of described TC4069UBP integrated chip is connected with one end of doorbell microswitch with by resistance R4, the external power supply of the other end of described doorbell microswitch, the oscillator signal output terminal of described TC4069UBP integrated chip is connected with the input end of high-frequency oscillating circuits;
Described high-frequency oscillating circuits comprises launches triode Q1, printed inductance L1, transmitting indicating lamp D1, electric capacity C1, collector junction capacitance C2 and electric capacity C3, the oscillator signal output terminal of described TC4069UBP integrated chip respectively with the base stage of launching triode Q1, emitter is connected, the base stage of described transmitting triode Q1 is also connected as electric capacity C1, the base stage of described transmitting triode Q1 is also connected with one end of printed inductance L1 by resistance R1, the collector of described transmitting triode Q1 is connected with the other end of printed inductance L1, described collector junction capacitance C2 is connected in parallel on the collector launching triode Q1, described electric capacity C3 is connected in parallel on the two ends of printed inductance L1, described printed inductance L1 is also connected with the positive pole of transmitting indicating lamp D1 by resistance R3, described printed inductance L1 is also connected with one end of doorbell microswitch, described printed inductance L1 is for generation of electromagnetic wave, send doorbell signal.
The oscillation frequency of described crystal oscillator X1 is 32.768kHz.
The principle of work of wireless transmitting unit of the present invention is that doorbell microswitch is when pressing, modulation oscillator circuit, produce oscillator signal, there is provided that 20-30mA's pour into electric current, and carry out frequency modulation by high-frequency oscillating circuits, oscillation frequency is determined by printed inductance L1 and electric capacity C3 and collector junction capacitance C2, is generally 200-270MHz, transmitted by printed inductance L1, doorbell microswitch is often by once just launching once.
As shown in Figure 3, described superregeneration vibration receiving circuit comprises triode Q3, coil inductance L2, colour loop inductance L3, electric capacity C4, electric capacity C16, described coil inductance L2 is as the receiving element of superregeneration vibration receiving circuit, the doorbell signal that resonance sends for receiving printed inductance L1 is produced with printed inductance L1, one end of described coil inductance L2 is connected with the collector of triode Q3, described electric capacity C16 is connected in parallel on the two ends of coil inductance L2, described colour loop inductance L3 is connected with the emitter of triode Q3, described electric capacity C4 is connected in parallel on the emitter of triode Q3, between collector, the base stage of described triode Q3 as the output terminal of superregeneration vibration receiving circuit by being connected with signal amplification circuit after resistance R14 step-down,
Described signal amplification circuit comprises integrated amplification chip TC4069, the input end of described integrated amplification chip TC4069 is in series with electric capacity C7, resistance R5, described resistance R5 is connected with resistance R14, described integrated amplification chip TC4069 is three grades of high-gain amplifiers, the modulation signal that the receiving circuit that superregeneration vibrated exports amplifies, the output terminal of described integrated amplification chip TC4069 is connected with the input end of frequency-selecting shaping circuit as the output terminal of signal amplification circuit, the filter capacitor C8 filtered for high frequency spurs is also parallel with between second level amplification place of described integrated amplification chip TC4069 and third level amplification place,
Described frequency-selecting shaping circuit comprises frequency-selecting crystal oscillator X2, shaping triode Q2, described frequency-selecting crystal oscillator X is connected with the output terminal of signal amplification circuit, for passing through the identical modulation signal of frequency, described frequency-selecting crystal oscillator X is connected with the base stage of shaping triode Q2, and the collector of described shaping triode Q2 is connected with the input end of speech chip as the output terminal of frequency-selecting shaping circuit;
The output terminal of described speech chip is connected with loudspeaker by push-pull power amplifier circuit, and described speech chip is TQ33G chip.
Described coil inductance L2 coiling on the skeleton of diameter 5mm, enclosing around 3 with the enameled wire of 0.51mm, is copper core in the middle of described skeleton.
The oscillation frequency of described frequency-selecting crystal oscillator X2 is 32.768kHz.
Music type selector switch SW2 is provided with between described speech chip and frequency-selecting shaping circuit.
The principle of work of radio receiving unit of the present invention, when the oscillation frequency of coil inductance L2 is identical with wireless transmitting unit, produce resonance, colour loop inductance L3, high-frequency signal is stoped to pass through, and, superregeneration vibration receiving circuit has self-recification function, modulation signal after detection produces pressure drop on resistance R14, through resistance R5, electric capacity C7 sends into integrated circuit (IC) chip TC4069 and amplifies, shaping is amplified again, realize three grades of high-gain amplifiers, and the high frequency spurs be provided with after high frequency spurs electric capacity C8 filtering detection, then frequency-selecting effect is played in circuit through frequency-selecting crystal oscillator X2, the signal of same frequency can pass through smoothly, eliminate the interference of many unwanted various outer signals, shaping is amplified for driving speech chip through shaping triode Q2 after frequency-selecting, speech chip is TQ33G chip, there are three kinds of sound can select, double-tone ding-dong, Westminster, Ai Lisi, selector switch SW2 is melody selector switch, speech chip after overdriving, be connected with loudspeaker through push-pull power amplifier circuit, promote loudspeaker and send graceful doorbell musical sound.
In sum, wireless remote control doorbell of the present invention, comprise wireless transmitting unit and radio receiving unit, wireless transmitting unit is arranged on open air, radio receiving unit is arranged on indoor, distance between wireless transmitting unit and radio receiving unit is between 10-20m, and realize the controlled in wireless of doorbell, circuit is simple, easy realization, easy to use, stability is high, has a good application prospect.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (7)
1. a wireless remote control doorbell, it is characterized in that: comprise wireless transmitting unit and radio receiving unit, described wireless transmitting unit is arranged on open air, and described radio receiving unit is arranged on indoor, distance between described wireless transmitting unit and radio receiving unit is between 10-20m
Described wireless transmitting unit comprises doorbell microswitch, modulation oscillator circuit, high-frequency oscillating circuits, described doorbell microswitch is connected with the trigger end of modulation oscillator circuit, the output terminal of described modulation oscillator circuit is connected with the input end of high-frequency oscillating circuits, and the output terminal of described high-frequency oscillating circuits sends doorbell signal as the output terminal of wireless transmitting unit to radio receiving unit;
Described radio receiving unit comprises the superregeneration vibration receiving circuit, signal amplification circuit, frequency-selecting shaping circuit, speech chip, push-pull power amplifier circuit and the loudspeaker that are connected successively, and the input end of described superregeneration vibration receiving circuit receives wireless transmitting unit as the input end of radio receiving unit and sends doorbell signal.
2. a kind of wireless remote control doorbell according to claim 1, it is characterized in that: described modulation oscillator circuit comprises TC4069UBP integrated chip and crystal oscillator X1, described crystal oscillator X1 provides oscillation source for TC4069UBP integrated chip, the trigger end of described TC4069UBP integrated chip is connected with one end of doorbell microswitch with by resistance R4, the external power supply of the other end of described doorbell microswitch, the oscillator signal output terminal of described TC4069UBP integrated chip is connected with the input end of high-frequency oscillating circuits;
Described high-frequency oscillating circuits comprises launches triode Q1, printed inductance L1, transmitting indicating lamp D1, electric capacity C1, collector junction capacitance C2 and electric capacity C3, the oscillator signal output terminal of described TC4069UBP integrated chip respectively with the base stage of launching triode Q1, emitter is connected, the base stage of described transmitting triode Q1 is also connected as electric capacity C1, the base stage of described transmitting triode Q1 is also connected with one end of printed inductance L1 by resistance R1, the collector of described transmitting triode Q1 is connected with the other end of printed inductance L1, described collector junction capacitance C2 is connected in parallel on the collector launching triode Q1, described electric capacity C3 is connected in parallel on the two ends of printed inductance L1, described printed inductance L1 is also connected with the positive pole of transmitting indicating lamp D1 by resistance R3, described printed inductance L1 is also connected with one end of doorbell microswitch, described printed inductance L1 is for generation of electromagnetic wave, send doorbell signal.
3. a kind of wireless remote control doorbell according to claim 2, is characterized in that: the oscillation frequency of described crystal oscillator X1 is 32.768kHz.
4. a kind of wireless remote control doorbell according to claim 1 and 2, it is characterized in that: described superregeneration vibration receiving circuit comprises triode Q3, coil inductance L2, colour loop inductance L3, electric capacity C4, electric capacity C16, described coil inductance L2 is as the receiving element of superregeneration vibration receiving circuit, the doorbell signal that resonance sends for receiving printed inductance L1 is produced with printed inductance L1, one end of described coil inductance L2 is connected with the collector of triode Q3, described electric capacity C16 is connected in parallel on the two ends of coil inductance L2, described colour loop inductance L3 is connected with the emitter of triode Q3, described electric capacity C4 is connected in parallel on the emitter of triode Q3, between collector, the base stage of described triode Q3 as the output terminal of superregeneration vibration receiving circuit by being connected with signal amplification circuit after resistance R14 step-down,
Described signal amplification circuit comprises integrated amplification chip TC4069, the input end of described integrated amplification chip TC4069 is in series with electric capacity C7, resistance R5, described resistance R5 is connected with resistance R14, described integrated amplification chip TC4069 is three grades of high-gain amplifiers, the modulation signal that the receiving circuit that superregeneration vibrated exports amplifies, the output terminal of described integrated amplification chip TC4069 is connected with the input end of frequency-selecting shaping circuit as the output terminal of signal amplification circuit, the filter capacitor C8 filtered for high frequency spurs is also parallel with between second level amplification place of described integrated amplification chip TC4069 and third level amplification place,
Described frequency-selecting shaping circuit comprises frequency-selecting crystal oscillator X2, shaping triode Q2, described frequency-selecting crystal oscillator X is connected with the output terminal of signal amplification circuit, for passing through the identical modulation signal of frequency, described frequency-selecting crystal oscillator X is connected with the base stage of shaping triode Q2, and the collector of described shaping triode Q2 is connected with the input end of speech chip as the output terminal of frequency-selecting shaping circuit;
The output terminal of described speech chip is connected with loudspeaker by push-pull power amplifier circuit, and described speech chip is TQ33G chip.
5. a kind of wireless remote control doorbell according to claim 4, is characterized in that: described coil inductance L2 coiling on the skeleton of diameter 5mm, and enclosing around 3 with the enameled wire of 0.51mm, is copper core in the middle of described skeleton.
6. a kind of wireless remote control doorbell according to claim 4, is characterized in that: the oscillation frequency of described frequency-selecting crystal oscillator X2 is 32.768kHz.
7. a kind of wireless remote control doorbell according to claim 4, is characterized in that: be provided with music type selector switch SW2 between described speech chip and frequency-selecting shaping circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510239695.3A CN104809830A (en) | 2015-05-13 | 2015-05-13 | Wireless remote-control doorbell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510239695.3A CN104809830A (en) | 2015-05-13 | 2015-05-13 | Wireless remote-control doorbell |
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| Publication Number | Publication Date |
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| CN104809830A true CN104809830A (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510239695.3A Pending CN104809830A (en) | 2015-05-13 | 2015-05-13 | Wireless remote-control doorbell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111105684A (en) * | 2020-01-09 | 2020-05-05 | 北京中诚博睿教育科技有限公司 | Electronic remote control doorbell teaching aid for children intelligence development |
| CN112466072A (en) * | 2020-11-23 | 2021-03-09 | 小行星众创空间孵化器(常州)有限公司 | Intelligent doorbell system and control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2396454Y (en) * | 1999-11-03 | 2000-09-13 | 林洲明 | Domestic remote-controlled door bell |
| CN2824162Y (en) * | 2005-09-29 | 2006-10-04 | 李和添 | Artistic ornament with calling function |
| CN203368448U (en) * | 2013-08-08 | 2013-12-25 | 东莞骏威电子制品有限公司 | Remote control doorbell transmitter |
-
2015
- 2015-05-13 CN CN201510239695.3A patent/CN104809830A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2396454Y (en) * | 1999-11-03 | 2000-09-13 | 林洲明 | Domestic remote-controlled door bell |
| CN2824162Y (en) * | 2005-09-29 | 2006-10-04 | 李和添 | Artistic ornament with calling function |
| CN203368448U (en) * | 2013-08-08 | 2013-12-25 | 东莞骏威电子制品有限公司 | Remote control doorbell transmitter |
Non-Patent Citations (1)
| Title |
|---|
| QUBORONG: "无线遥控门铃", 《百度文库 HTTP://WENKU.BAIDU.COM/LINK?URL=XNN-ED-90WN5EKOJWY0OJV_A3BBPCWIOAB6Z_8HC_KYNQTLYU1N8_UKPITFMFFBCKK88PXSPBFVTT6XBFQMN5PS2UCEZQGUGG-3DF09TQ1K》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111105684A (en) * | 2020-01-09 | 2020-05-05 | 北京中诚博睿教育科技有限公司 | Electronic remote control doorbell teaching aid for children intelligence development |
| CN112466072A (en) * | 2020-11-23 | 2021-03-09 | 小行星众创空间孵化器(常州)有限公司 | Intelligent doorbell system and control method thereof |
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Application publication date: 20150729 |
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