CN103413392B - Electronic door bell - Google Patents

Electronic door bell Download PDF

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Publication number
CN103413392B
CN103413392B CN201310393536.XA CN201310393536A CN103413392B CN 103413392 B CN103413392 B CN 103413392B CN 201310393536 A CN201310393536 A CN 201310393536A CN 103413392 B CN103413392 B CN 103413392B
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China
Prior art keywords
button
capacitor
doorbell
control component
signal
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Expired - Fee Related
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CN201310393536.XA
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Chinese (zh)
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CN103413392A (en
Inventor
刘远星
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DONGGUAN JUNWEI ELECTRONIC PRODUCT Co Ltd
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DONGGUAN JUNWEI ELECTRONIC PRODUCT Co Ltd
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Priority to CN201310393536.XA priority Critical patent/CN103413392B/en
Publication of CN103413392A publication Critical patent/CN103413392A/en
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Publication of CN103413392B publication Critical patent/CN103413392B/en
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Abstract

Electronic door bell, relate to a kind of doorbell, it is installed on wall or doorframe, comprise and be provided with the button assembly of bell button and the Control Component for generation of sounding control signal, described doorbell also comprises the sounding component being connected with described Control Component, described Control Component can being inserted in wall inside or doorframe inner and removably connect with button assembly, described doorbell comprises the doorbell decoration panel that is arranged at surface of wall or doorframe surface, described doorbell decoration panel is provided with through hole, described button assembly comprises the button shell that is arranged in described through hole, the outer end of described button shell is provided with the lug boss for blocking described doorbell decoration panel. button assembly and the Control Component of electronic door bell removably connect, and its interface can make the versatility of button assembly and Control Component greatly improve after reunification, by the Control Component being inserted in wall inside of electronic door bell or doorframe inside, stay button outside, also can be equipped with doorbell decoration panel simultaneously and decorate, to meet the decoration style of metope entirety.

Description

Electronic door bell
Technical field
The present invention relates to a kind of doorbell, be specifically related to a kind of electronic door bell.
Background technology
Electronic door bell, comprises and the button assembly that bell button rings a doorbell to visitor is provided and controls the Control Component of sounding, electronic door bell comprises wired electronic door bell and wireless electronic doorbell, and wherein wireless electronic doorbell is also referred to as remote-controlled doorbell. in the structure of existing electronic door bell, button assembly and Control Component are not all obviously separated in an overall structure as a global design, button assembly and Control Component all do not possess versatility substantially like this, be that button assembly can not be used in conjunction with other Control Component, or Control Component can not be selected to be used in conjunction with other button assembly, the difference of Wired electronic doorbell and wireless electronic doorbell is only the difference of Control Component, that is to say what button assembly still can share, but the structure of the above-mentioned one of existing electronic door bell can not realize same button assembly and be common to Wired electronic doorbell and wireless electronic doorbell.
Meanwhile, existing most electronic door bells all adopt traditional square structure, and all parts are all exposed at surface of wall, so not only can destroy the attractive in appearance of metope, affect the decoration style of metope entirety, also easy affected by environment breaking down. Meanwhile, the appearance forrns of doorbell is single, can not provide too many selection to consumer, so most of consumer is difficult to buy the beautiful doorbell products of profile that meets own regard.
In addition, as the one of electronic door bell, wireless electronic doorbell comprises an emitter, and emitter produces sounding control signal and sends to and be installed on indoor receiver after the button of button assembly is pressed, and the receiver prompt door of just can sounding has people visiting outward thus. the emitter of existing most wireless electronic doorbells all adopts LC oscillating circuit to produce RF frequency, be fine-tuning to fixing frequency by tunable capacitor again, the drawback of sort circuit maximum is exactly that tranmitting frequency is along with the passing of variation of ambient temperature and time can be offset, very easily exceed wireless safety requirement, thereby the potential safety hazard of causing, simultaneously, external environment easily affects the tranmitting frequency of sort circuit, the different sort circuit of mounting condition also can pass through its tranmitting frequency of effect of parasitic capacitance, such as be arranged in metallic door and wooden door on tranmitting frequency just different, even Changes in weather all can exert an influence to its tranmitting frequency and coverage, in addition, the artificial tunable capacitor inconvenience on producing of adjusting, make the uniformity of same money product poor.
Summary of the invention
The versatility that the object of this invention is to provide a kind of button assembly and Control Component is good, and good looking appearance does not affect the electronic door bell of metope entirety decoration style.
Electronic door bell is designed to the overall decoration style that various shapes meet metope, need design according to the overall decoration style of different metopes on the one hand the shape of different electronic door bells, cost is higher, and electronic door bell entirety is on surface of wall or doorframe surface on the other hand, and visual effect is also bad. Therefore the present invention, by most of parts being inserted in wall inside or the doorframe inside of doorframe bell, only leaves a door unlocked bell button outside.
For achieving the above object, the invention provides following technical scheme.
Electronic door bell, be installed on wall or doorframe, comprise and be provided with the button assembly of bell button and the Control Component for generation of sounding control signal, described doorbell also comprises the sounding component being connected with described Control Component, described Control Component can being inserted in wall inside or doorframe inner and removably connect with button assembly.
Wherein, in described Control Component and button assembly, an assembly is provided with hook-shaped snap close, and another assembly is provided with the contiguous block with described snap fit snapping, and described button assembly and Control Component removably connect by the snapping of described snap close and contiguous block.
Wherein, described doorbell comprises the doorbell decoration panel that is arranged at surface of wall or doorframe surface, described doorbell decoration panel is provided with through hole, described button assembly comprises the button shell that is arranged in described through hole, and the outer end of described button shell is provided with the lug boss for blocking described doorbell decoration panel.
Wherein, described Control Component comprises the Control Component shell shielding of cylindric hollow.
Wherein, described doorbell is provided with the indicator lamp that is used to indicate described bell button position.
Wherein, described electronic door bell is wireless electronic doorbell, and the Control Component of described wireless electronic doorbell is controlled in wireless assembly.
Wherein, described controlled in wireless assembly comprises transmitter and receiver, described receiver is connected with described sounding component, described emitter comprise for generation of with the transmitter circuitry of transmitting sounding control signal, described receiver is used for receiving described sounding control signal and controls sounding component and sound.
Wherein, described transmitter circuitry comprises by the press button of the bell button control in described button assembly and signal generation radiating circuit, press button is connected on power supply and signal produces between radiating circuit, signal produces radiating circuit and comprises harmonic wave inhibition and signal transmission circuit, coding circuit and PLL high-frequency oscillating circuits, and coding circuit, harmonic wave suppress and signal transmission circuit is all connected with PLL high-frequency oscillating circuits; After press button closure, PLL high-frequency oscillating circuits produces high-frequency signal, coding circuit produces modulation signal and described modulation signal is transferred to PLL high-frequency oscillating circuits simultaneously, described high-frequency signal becomes sounding control signal after described modulation signal modulation, and described sounding control signal suppresses via harmonic wave and signal transmission circuit is launched.
Wherein, PLL high-frequency oscillating circuits comprises for generation of the crystal oscillator Y1 of low frequency signal with for the low frequency signal frequency multiplication of crystal oscillator Y1 generation being become to the PLL circuit of high-frequency signal; Described PLL circuit comprises high frequency IC U3, the model of high frequency IC U3 is MICRF113YM6, described PLL high-frequency oscillating circuits also comprises capacitor C 4 and capacitor C 5, the two ends of crystal oscillator Y1 are connected with No. 4 pins and No. 5 pins of high frequency IC U3 respectively, one end of capacitor C 4 and capacitor C 5 is connected with the two ends of crystal oscillator Y1 respectively, the equal ground connection of the other end of capacitor C 4 and capacitor C 5, No. 3 pins of high frequency IC U3 are connected with described press button.
Wherein, described harmonic wave suppresses and signal transmission circuit comprises resistance R 5, inductance L 2, inductance L 3, capacitor C 6, capacitor C 7, capacitor C 8, capacitor C 9 and antenna ANT, and resistance R 5, inductance L 2 and capacitor C 9 are connected, and are connected between press button and ground; Capacitor C 8 one end are connected with the contact of resistance R 5 and inductance L 2, other end ground connection; Capacitor C 6, inductance L 3 and antenna ANT series connection, one end of capacitor C 6 is connected in the contact of inductance L 2 and capacitor C 9; One end of capacitor C 7 is connected with the contact of inductance L 3 and antenna ANT, other end ground connection.
The invention has the beneficial effects as follows: button assembly and the Control Component of electronic door bell removably connect, its interface can make the versatility of button assembly and Control Component greatly improve after reunification; By the Control Component being inserted in wall inside of electronic door bell or doorframe inside, stay button outside, also can be equipped with doorbell decoration panel simultaneously and decorate, doorbell decoration panel can be selected suitable figure, shape and color etc., to meet the decoration style of metope entirety; Wireless electronic doorbell adopts crystal oscillator by the transmitter circuitry of the frequency multiplication of phase locked loop technology generation higher-order of oscillation, frequency stabilization, and production debugging is convenient, easily meets the requirement of radio safety; The position that indicator lamp carrys out indicating door bell button is set simultaneously, makes evening visiting guest can find easily bell button.
Brief description of the drawings
Fig. 1 is the structural representation of electronic door bell of the present invention.
Fig. 2 is the decomposing schematic representation of button assembly and controlled in wireless assembly.
Fig. 3 is the schematic diagram that button assembly and controlled in wireless assembly are connected.
Fig. 4 is the schematic diagram that circuit board installation frame and Control Component shell are connected.
Fig. 5 is the structural representation of circuit board installation frame.
Fig. 6 is the structural representation of button assembly.
Fig. 7 is transmitter circuitry block diagram.
Fig. 8 is transmitter circuitry structural representation.
Reference numeral comprises: Control Component 1, circuit board 111, circuit board installation frame 112, battery 113, antenna 114, disk 115, snap close 116, latch hook 117, Control Component shell 12, battery cover 121, lockhole 122, button assembly 2, bell button 21, button shell 22, contiguous block 221, lug boss 222, raised line 223, doorbell decoration panel 3, LED4, signal produce radiating circuit 5.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is elaborated.
As shown in Figure 1, electronic door bell of the present invention, comprise button assembly 2 and the Control Component 1 for generation of sounding control signal, described doorbell also comprises the sounding component (not shown) being connected with described Control Component 1, described Control Component 1 being inserted in wall inside or doorframe are inner and removably connect with button assembly 2, in conjunction with Fig. 3 and Fig. 6, in Control Component 1 and button assembly 2, an assembly is provided with hook-shaped snap close 116, another assembly is provided with the contiguous block 221 that coordinates snapping with described snap close 116, as shown in Figure 3, button assembly 2 and Control Component 1 removably connect by the snapping of snap close 116 and contiguous block 221. in the present embodiment, Control Component 1 is provided with hook-shaped snap close 116, and button assembly 2 is provided with the contiguous block 221 that coordinates snapping with described snap close 116. button assembly 2 removably connects with Control Component 1, as long as unified interface, same button assembly 2 just can be used in conjunction with from multiple different Control Component, such as, same button assembly 2 can be connected to use with controlled in wireless assembly, also can be connected to use with wired Control Component, in the present embodiment, Control Component 1 be controlled in wireless assembly. in like manner, same Control Component 1 can also be used in conjunction with from multiple different button assembly 2. therefore the versatility of button assembly 2 and Control Component 1 is greatly improved, and user can select wired Control Component or controlled in wireless assembly according to the situation of oneself.
The controlled in wireless assembly of the present embodiment comprises transmitter and receiver, described receiver is connected with described sounding component, described emitter comprise for generation of with the transmitter circuitry of transmitting sounding control signal, described receiver is used for receiving described sounding control signal and controls sounding component and sound, as shown in Figure 2, controlled in wireless assembly also comprises the circuit board 111 that carries described transmitter circuitry, for the circuit board installation frame 112 of this circuit board 111 is installed, for the power supply to transmitter circuitry power supply and the antenna 114 being connected with circuit board 111 for transmitting, circuit board 111 is fixed on circuit board installation frame 112. as shown in Figure 5, one end of circuit board installation frame 112 is provided with a disk 115 jaggy, and described hook-shaped snap close 116 is just arranged on one side of disk 115, and snap close 116 has two. the another side of disk 115 is provided with two latch hooks 117, as shown in Figure 2, the controlled in wireless assembly of the present embodiment is also provided with the Control Component shell 12 shielding of cylindric hollow, circuit board 111, power supply and antenna 114 are all arranged in this Control Component shell 12, certainly, Control Component shell 12 is not limited to controlled in wireless assembly, wired Control Component equally also can have, the position of the corresponding latch hook 117 of Control Component shell 12 is provided with lockhole 122, as shown in Figure 4, when 12 assemblings of Control Component shell are got on, promoting Control Component shell 12 buckles in the lockhole 122 of Control Component shell 12 two latch hooks 117. the circuit board installation frame 112 of the present embodiment is one-body molded. Control Component shell 12 cylindraceous, make electronic door bell of the present invention be different from traditional square structure, what is more important, drum easier being inserted in wall inside or doorframe inside, simultaneously also minimum to the destruction of body of wall or doorframe, only need out a roundlet hole. by Control Component 1 being inserted in wall inside, there is again the protection of Control Component shell 12 simultaneously, circuit board 111 is not easily damaged, can ensure the steady operation of transmitter circuitry on circuit board 111 yet. in the present embodiment, because Control Component 1 is controlled in wireless assembly, so adopt battery 113 to power to transmitter circuitry as power supply, as shown in Figure 2, therefore a part for Control Component shell 12 is also battery cover 121, and battery cover 121 can be taken apart separately, is convenient for changing battery 113.
Doorbell of the present invention is provided with indicator lamp comes the position of indicating door bell button 21, in conjunction with Fig. 2 and Fig. 5, in the middle of the disk 115 of circuit board installation frame 112, a circular hole is set, described indicator lamp is connected with circuit board 111 through this circular hole, and power supply is powered to indicator lamp by the related circuit on circuit board 111, in the present embodiment, adopt LED4 as indicator lamp, since energy-conservation, long service life that LED4 has, the feature that stability is high and glow color is various, the long bright too many electric weight that also can not consume of LED4. Had the position of indicator lamp indicating door bell button 21, in the environment of insufficient light, in for example evening, the people of visiting still can know the position of bell button 21 exactly, and the people of convenient visiting rings a doorbell.
As shown in Figure 1, electronic door bell of the present invention also comprises doorbell decoration panel 3, doorbell decoration panel 3 is installed on surface of wall or doorframe surface, doorbell decoration panel 3 is provided with circular through hole, as shown in Figure 6, described button assembly 2 comprises bell button 21 and button shell 22, button shell 22 is arranged in the through hole of doorbell decoration panel 3, button shell 22 hollows, bell button 21 is arranged in button shell 22, two contiguous blocks 221 are arranged on the inner inner side of button shell 22, the outer end of button shell 22 is provided with the lug boss 222 for blocking doorbell decoration panel 3, button shell 22 lateral surfaces are provided with some raised lines 223, button shell 22 fits inside in the through hole of doorbell decoration panel 3, raised line 223 can play the effect being connected of stablizing between doorbell decoration panel 3 and button shell 22. electronic door bell of the present invention, by whole Control Component 1, even together with a part of being inserted in wall inside or the doorframe inside of button assembly 2, the bell button 21 of only leaving a door unlocked exposes on wall surface or doorframe surface, be equipped with again doorbell decoration panel 3, by selecting suitable figure, shape and the color etc. of doorbell decoration panel 3, meet the decoration style of metope entirety. electronic door bell of the present invention be it seems succinctly elegant in appearance from the outside.
When button assembly 2 will be connected with Control Component 1, only snap close 116 and contiguous block 221 need be aimed at, rotary press button module 2 or Control Component 1 make snap close 116 fastening contiguous blocks 221. Bell button 21 adopts light transmissive material to make, and after button assembly 2 and Control Component 1 assemble, the position of LED4 is just in bell button 21, and the luminous bell button 21 that sees through of LED4, to reach the object of indicating door bell button 21 positions.
The Control Component 1 of the present embodiment is controlled in wireless assembly, and controlled in wireless assembly comprises emitter, emitter comprise for generation of with the transmitter circuitry of transmitting sounding control signal. As shown in Figure 7, described transmitter circuitry comprises that press button S1 and the signal controlled by the bell button 21 in described button assembly produce radiating circuit 5, press button S1 is connected on power supply and signal produces between radiating circuit 5, signal produces radiating circuit 5 and comprises harmonic wave inhibition and signal transmission circuit, coding circuit and PLL high-frequency oscillating circuits, and coding circuit, harmonic wave suppress and signal transmission circuit is all connected with PLL high-frequency oscillating circuits; After press button S1 closure, PLL high-frequency oscillating circuits produces high-frequency signal, coding circuit produces modulation signal and described modulation signal is transferred to PLL high-frequency oscillating circuits simultaneously, described high-frequency signal becomes sounding control signal after described modulation signal modulation, and described sounding control signal suppresses via harmonic wave and signal transmission circuit is launched. As shown in Figure 8, PLL high-frequency oscillating circuits comprises for generation of the crystal oscillator Y1 of low frequency signal with for the low frequency signal frequency multiplication of crystal oscillator Y1 generation being become to the PLL circuit of high-frequency signal. Described PLL circuit comprises high frequency IC U3, the model of high frequency IC U3 is MICRF113YM6, described PLL high-frequency oscillating circuits also comprises capacitor C 4 and capacitor C 5, the two ends of crystal oscillator Y1 are connected with No. 4 pins and No. 5 pins of high frequency IC U3 respectively, one end of capacitor C 4 and capacitor C 5 is connected with the two ends of crystal oscillator Y1 respectively, the equal ground connection of the other end of capacitor C 4 and capacitor C 5, No. 3 pins of high frequency IC U3 are connected with described press button S1. Described harmonic wave suppresses and signal transmission circuit comprises resistance R 5, inductance L 2, inductance L 3, capacitor C 6, capacitor C 7, capacitor C 8, capacitor C 9 and antenna ANT, and resistance R 5, inductance L 2 and capacitor C 9 are connected, and are connected between press button S1 and ground; Capacitor C 8 one end are connected with the contact of resistance R 5 and inductance L 2, other end ground connection; Capacitor C 6, inductance L 3 and antenna ANT series connection, one end of capacitor C 6 is connected in the contact of inductance L 2 and capacitor C 9; One end of capacitor C 7 is connected with the contact of inductance L 3 and antenna ANT, other end ground connection.
As shown in Figure 7, transmitter circuitry also comprises mu balanced circuit, and mu balanced circuit is connected between power supply and press button S1, simultaneously, power supply is also powered to the LED4 as indicator lamp by transmitter circuitry, and LED4 connects with resistance R 4, is connected between mu balanced circuit and the contact and ground of press button S1. In the present embodiment, adopt battery 113 as power supply, battery 113 voltages produce galvanic current and press after mu balanced circuit, in conjunction with Fig. 1, because the current/voltage of LED4 is not subject to the control of press button S1, therefore LED4 is in normal bright state, the position of indicating door bell button 21. When bell button 21 is not pressed, when press button S1 disconnects, signal produces radiating circuit 5 and does not switch on and do not work, to save battery 113 electric weight; When bell button 21 is pressed, while being press button S1 closure, signal produces radiating circuit 5 and switches on, crystal oscillator Y1 in PLL high-frequency oscillating circuits produces low frequency signal becomes high-frequency signal through PLL circuit frequency multiplication, coding circuit produces modulation signal and described modulation signal is transferred to PLL high-frequency oscillating circuits simultaneously, described high-frequency signal becomes sounding control signal after described modulation signal modulation, and described sounding control signal suppresses via harmonic wave and signal transmission circuit is launched. Wherein, crystal oscillator Y1, capacitor C 4 and capacitor C 5 form low frequency reference frequency, adopt the crystal oscillator Y1 of different frequency value can obtain different high-frequency emission frequencies, for example, adopt the crystal oscillator of 9.84375MHz, the PLL circuit of the present embodiment can carry out 32 frequencys multiplication, and the PLL high-frequency oscillating circuits of the present embodiment can obtain the high-frequency signal of 9.84375*32=315MHz. The resistance R 5 of harmonic wave inhibition and signal transmission circuit is for limiting high-frequency emission power, and inductance L 2 and capacitor C 8 suppress for high-frequency harmonic, and capacitor C 6, capacitor C 9, inductance L 3 and capacitor C 7 also have for antenna match the function that harmonic wave suppresses simultaneously.
Adopt crystal oscillator by the transmitter circuitry of the frequency multiplication of phase locked loop technology generation higher-order of oscillation, frequency stabilization, production debugging is convenient, easily meets the requirement of radio safety.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although the present invention has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement technical scheme of the present invention, and not depart from essence and the scope of technical solution of the present invention.

Claims (9)

1. electronic door bell, is installed on wall or doorframe, comprises the button assembly that is provided with bell buttonWith the Control Component for generation of sounding control signal, described doorbell also comprises and described controlThe sounding component that assembly processed connects, is characterized in that: described Control Component can being inserted in wallInside or doorframe are inner and removably connect with button assembly, and described Control Component comprises circleThe Control Component shell shielding of tubular hollow, the tube wall of this Control Component shellA part be battery cover.
2. electronic door bell according to claim 1, is characterized in that: described Control ComponentIn button assembly, an assembly is provided with hook-shaped snap close, and another assembly is provided withWith the contiguous block of described snap fit snapping, described button assembly and Control Component pass through instituteThe snapping of stating snap close and contiguous block removably connects.
3. electronic door bell according to claim 1, is characterized in that: described doorbell comprisesBe arranged at the doorbell decoration panel on surface of wall or doorframe surface, described doorbell decoration panelBe provided with through hole, described button assembly comprises the button shell that is arranged in described through hole, instituteThe outer end of stating button shell is provided with the lug boss for blocking described doorbell decoration panel.
4. electronic door bell according to claim 1, is characterized in that: described doorbell settingBe useful on the indicator lamp of instruction described bell button position.
5. electronic door bell according to claim 1, is characterized in that: described electronic door bellFor wireless electronic doorbell, the Control Component of described wireless electronic doorbell is controlled in wireless assembly.
6. electronic door bell according to claim 5, is characterized in that: described controlled in wirelessAssembly comprises transmitter and receiver, and described receiver is connected with described sounding component, instituteState emitter comprise for generation of with the transmitter circuitry of transmitting sounding control signal, described inReceiver is used for receiving described sounding control signal and controls sounding component and sound.
7. electronic door bell according to claim 6, is characterized in that: described transmitting is dynamo-electricRoad comprises by press button and the signal of the bell button control in described button assembly and producingRadiating circuit, press button is connected on power supply and signal produces between radiating circuit, signalProduce radiating circuit comprise harmonic wave inhibition and signal transmission circuit, coding circuit and PLL highFrequency oscillator circuit, coding circuit, harmonic wave suppress and signal transmission circuit all with PLL high frequencyOscillating circuit connects; After press button closure, PLL high-frequency oscillating circuits produces high frequency letterNumber, coding circuit produces modulation signal and described modulation signal is transferred to PLL high simultaneouslyFrequency oscillator circuit, described high-frequency signal becomes sounding control after described modulation signal modulationSignal, described sounding control signal suppresses via harmonic wave and signal transmission circuit is launched.
8. electronic door bell according to claim 7, is characterized in that: the PLL higher-order of oscillationCircuit comprises for generation of the crystal oscillator Y1 of low frequency signal with for by crystal oscillationThe low frequency signal frequency multiplication that device Y1 produces becomes the PLL circuit of high-frequency signal; Described PLLCircuit comprises high frequency IC U3, and the model of high frequency IC U3 is MICRF113YM6, described inPLL high-frequency oscillating circuits also comprises capacitor C 4 and capacitor C 5, two of crystal oscillator Y1End is connected with No. 4 pins and No. 5 pins of high frequency IC U3 respectively, capacitor C 4 and electric capacityOne end of C5 is connected with the two ends of crystal oscillator Y1 respectively, capacitor C 4 and capacitor C 5The equal ground connection of the other end, No. 3 pins of high frequency IC U3 are connected with described press button.
9. electronic door bell according to claim 7, is characterized in that: described harmonic wave suppressesAnd signal transmission circuit comprises resistance R 5, inductance L 2, inductance L 3, capacitor C 6, electric capacityC7, capacitor C 8, capacitor C 9 and antenna ANT, resistance R 5, inductance L 2 and electric capacityC9 series connection, is connected between press button and ground; Capacitor C 8 one end and resistance R 5 and electricityThe contact of sense L2 connects, other end ground connection; Capacitor C 6, inductance L 3 and antenna ANTSeries connection, one end of capacitor C 6 is connected in the contact of inductance L 2 and capacitor C 9; Capacitor C 7One end be connected with the contact of inductance L 3 and antenna ANT, other end ground connection.
CN201310393536.XA 2013-09-03 2013-09-03 Electronic door bell Expired - Fee Related CN103413392B (en)

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CN103413392B true CN103413392B (en) 2016-05-04

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109584485A (en) * 2017-09-28 2019-04-05 丁鑫 A kind of wireless doorbell

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5757305A (en) * 1994-07-29 1998-05-26 Dimango Products Transmitter for wireless audible indication system
CN201018617Y (en) * 2006-12-12 2008-02-06 王贵 Multifunctional wireless calling system
CN201730503U (en) * 2010-05-25 2011-02-02 朱志强 Video doorbell with electronic peephole viewer
CN202189417U (en) * 2011-07-19 2012-04-11 慈溪市一栋电子有限公司 Multifunctional wireless doorbell
CN203659123U (en) * 2013-09-03 2014-06-18 东莞骏威电子制品有限公司 Electronic doorbell

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201937759U (en) * 2010-11-30 2011-08-17 陈庆国 Doorphone and door with same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5757305A (en) * 1994-07-29 1998-05-26 Dimango Products Transmitter for wireless audible indication system
CN201018617Y (en) * 2006-12-12 2008-02-06 王贵 Multifunctional wireless calling system
CN201730503U (en) * 2010-05-25 2011-02-02 朱志强 Video doorbell with electronic peephole viewer
CN202189417U (en) * 2011-07-19 2012-04-11 慈溪市一栋电子有限公司 Multifunctional wireless doorbell
CN203659123U (en) * 2013-09-03 2014-06-18 东莞骏威电子制品有限公司 Electronic doorbell

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