CN2335204Y - Door bell capable of leaving message - Google Patents
Door bell capable of leaving message Download PDFInfo
- Publication number
- CN2335204Y CN2335204Y CN 98215769 CN98215769U CN2335204Y CN 2335204 Y CN2335204 Y CN 2335204Y CN 98215769 CN98215769 CN 98215769 CN 98215769 U CN98215769 U CN 98215769U CN 2335204 Y CN2335204 Y CN 2335204Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistance
- playback
- message
- integrated circuit
- Prior art date
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a door bell capable of leaving message, and solves the problem that because an existing door bell does not have a leaving message function, the information of a customer can not be preserved in the conditions that a host is not at home or the host is at home and does not want to open the door for unfriendly persons when the bell rings. The existing door bell is additionally provided with a plurality of components, such as a 555 integrated circuit, a triode T2, a capacitance C2, monomer speech circuits SR9K30A, a power amplifier integrated circuit TDA2822, loudspeakers SP1, SP2, a monomer speech circuits SR9K30 B, a circuit connected with a plurality of switches. No matter whether the host is at home or not, the information of the customer can be preserved.
Description
The utility model is a kind of message leaving door bell.
The existing doorbell structure function of not leaving a message, thereby under the situation that owner stays out, can not stay guest's information.Sometimes, because work or special circumstances, in order to prevent the stranger, or uninvited guest's arrival, bother the normal life of family, owner was in, hear that doorbell rings and also be reluctant to open the door; Can not stay guest's information like this.
The purpose of this utility model is, solves existing existing problem, and a kind of message leaving door bell easy to use is provided.
The utility model is achieved in that works as K switch
1When closed, low level signal triggers jingle bell integrated circuit KD9300, and ringing signal is through triode T
1Amplify, by loudspeaker SP
3Emit.Low level signal triggers 555 integrated circuit, 2 pin simultaneously, and 555 integrated circuit enter temporary stable state, and the 3 pin output high level of integrated circuit is through resistance R
4Make triode T
2Conducting, its ON time is by resistance R
2, capacitor C
1Decision.Along with triode T
2Conducting, capacitor C
2When normal current potential dropped to monomer sound circuit SR9K30A playback level gradually, monomer sound circuit SR9K30A produced the playback signal, and this signal is through resistance R
4Enter 7 pin of power amplifier integrate circuit TDA2822, amplify the back by loudspeaker SP
1Emit.Begin back 555 integrated circuit at the playback signal and finish temporary stable state, its 3 pin output low level is through resistance R
4Make triode T
2End, power supply is through resistance R
3To capacitor C
2Charging, capacitor C
2Positive terminal potential raises gradually, when being higher than monomer sound circuit SR9K30A playback level, finishing this playback, and prepares for next playback.As guest Push switch K repeatedly
1, because the stability of monostable circuit, circuit keeps above-mentioned working routine constant.As the people is arranged in the family, when hearing jingle bell, before circuit is not emitted the prompt tone message (this section period is temporary stable state), owner can press K
2, K
3The closure of (interlock) this switch.555 integrated circuit, 3 pin output low levels enter steady state (SS); Triode T
2End, power supply is through resistance R
3Rapidly to capacitor C
2Charging raises monomer sound circuit SR9K30A playback terminal potential fast, so the prompt tone signal is not emitted, owner opens the door and meets the guest.Work as K
7When closed, monomer sound circuit SR9K30B is in recording state, and D is bright for the message pilot lamp, Push switch K after owner goes home in microphone typing monomer sound circuit SR9K30B but the guest leaves a message
6, monomer sound circuit SR9K30B emits the message signal, through resistance R
5After entering the 6 pin amplification of TDA2822, by loudspeaker SP
2Emit message.
Advantage of the present utility model is no matter owner is staying out, and can both stay guest's information, and its monostable circuit is that the guest uses for convenience, in order to avoid pin button for a long time, guarantees that simultaneously the guest does not destroy delay time when repeatedly pressing bell button.
The drawing explanation:
Figure is a circuit connection diagram of the present utility model;
Describe in detail below in conjunction with accompanying drawing:
As shown in the figure, K
1Be doorbell switch.K
2, K
3Be linked switch, when closure, force the 3 pin output high level of 555 integrated circuit, improve capacitor C
2Current potential.K
4For owner's message playback switch, be put in indoor.K
5Be owner's recording switch, be put in indoor.K
6Be guest's voice mail switch, be put in indoor.K
7Be guest's voice mail switch, be put in outdoor.
Work as K switch
1When closed, low level signal triggers jingle bell integrated circuit KD9300, and ringing signal is through triode T
1Amplify, by loudspeaker SP
3Emit.Low level signal triggers 555 integrated circuit, 2 pin simultaneously, and 555 integrated circuit enter temporary stable state, and the 3 pin output high level of integrated circuit is through resistance R
4Make triode T
2Conducting, its ON time is by resistance R
2, capacitor C
1Decision.Along with triode T
2Conducting, capacitor C
2When normal current potential dropped to monomer sound circuit SR9K30A playback level gradually, monomer sound circuit SR9K30A produced the playback signal, and this signal is through resistance R
4Enter 7 pin of power amplifier integrate circuit TDA2822, amplify the back by loudspeaker SP
1Emit the playback signal begin the back 555 integrated circuit finish temporary stable state, its 3 pin output low level is through resistance R
4Make triode T
2End, power supply is through resistance R
3To capacitor C
2Charging, capacitor C
2Positive terminal potential raises gradually, when being higher than monomer sound circuit SR9K30A playback level, finishing this playback, and prepares for next playback.As guest Push switch K repeatedly
1, because the stability of monostable circuit, circuit keeps above-mentioned working routine constant.As the people is arranged in the family, when hearing jingle bell, before circuit is not emitted the prompt tone message (this section period is temporary stable state), owner can press K
2, K
3The closure of (interlock) this switch.555 integrated circuit, 3 pin output low levels enter steady state (SS); Triode T
2End, power supply is through resistance R
3Rapidly to capacitor C
2Charging raises monomer sound circuit SR9K30A playback terminal potential fast, so the prompt tone signal is not emitted, owner opens the door and meets the guest.Work as K
7When closed, monomer sound circuit SR9K30B is in recording state, and pilot lamp D is bright, and the guest leaves a message in microphone typing monomer sound circuit SR9K30B.But Push switch K after owner goes home
6, monomer sound circuit SR9K30B emits the message signal, through resistance R
5After entering the 6 pin amplification of TDA2822, by loudspeaker SP
2Emit message.
Claims (1)
1, a kind of message leaving door bell; Work as K switch
1When closed, low level signal triggers jingle bell integrated circuit KD9300, and ringing signal is through triode T
1Amplify, by loudspeaker SP
3Emit; It is characterized in that low level signal triggers 555 integrated circuit, 2 pin simultaneously, 555 integrated circuit enter temporary stable state, and the 3 pin output high level of integrated circuit is through resistance R
4Make triode T
2Conducting, its ON time is by resistance R
2, capacitor C
1Decision; Along with triode T
2Conducting, capacitor C
2When normal current potential dropped to monomer sound circuit SR9K30A playback level gradually, monomer sound circuit SR9K30A produced the playback signal, and this signal is through resistance R
4Enter 7 pin of power amplifier integrate circuit TDA2822, amplify the back by loudspeaker SP
1Emit; Begin back 555 integrated circuit at the playback signal and finish temporary stable state, its 3 pin output low level is through resistance R
4Make triode T
2End, power supply is through resistance R
3To capacitor C
2Charging, capacitor C
2Positive terminal potential raises gradually, when being higher than monomer sound circuit SR9K30A playback level, finishing this playback, and prepares for next playback; As the people is arranged in the family, when hearing jingle bell, before circuit was not emitted the prompt tone message, owner can press K
2, K
3The closure of switch, 555 integrated circuit, 3 pin output low levels enter steady state (SS); Triode T
2End, power supply is through resistance R
3Rapidly to capacitor C
2Charging raises monomer sound circuit SR9K30A playback terminal potential fast, so the prompt tone signal is not emitted, owner opens the door and meets the guest; Work as K
7When closed, monomer sound circuit SR9K30B is in recording state, and D is bright for the message pilot lamp, and the guest leaves a message in microphone typing monomer sound circuit SR9K30B; But Push switch K after owner goes home
6, monomer sound circuit SR9K30B emits the message signal, through resistance R
5After entering the 6 pin amplification of TDA2822, by loudspeaker SP
2Emit message.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98215769 CN2335204Y (en) | 1998-06-17 | 1998-06-17 | Door bell capable of leaving message |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98215769 CN2335204Y (en) | 1998-06-17 | 1998-06-17 | Door bell capable of leaving message |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2335204Y true CN2335204Y (en) | 1999-08-25 |
Family
ID=33968945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98215769 Expired - Fee Related CN2335204Y (en) | 1998-06-17 | 1998-06-17 | Door bell capable of leaving message |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2335204Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944260A (en) * | 2010-09-07 | 2011-01-12 | 南京信息工程大学 | Recording doorbell based on singlechip |
| CN107610384A (en) * | 2017-11-08 | 2018-01-19 | 陈永 | A kind of Novel doorbell |
-
1998
- 1998-06-17 CN CN 98215769 patent/CN2335204Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944260A (en) * | 2010-09-07 | 2011-01-12 | 南京信息工程大学 | Recording doorbell based on singlechip |
| CN107610384A (en) * | 2017-11-08 | 2018-01-19 | 陈永 | A kind of Novel doorbell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |