CN2500041Y - Hand-free receiver of mobile phone - Google Patents
Hand-free receiver of mobile phone Download PDFInfo
- Publication number
- CN2500041Y CN2500041Y CN 01231995 CN01231995U CN2500041Y CN 2500041 Y CN2500041 Y CN 2500041Y CN 01231995 CN01231995 CN 01231995 CN 01231995 U CN01231995 U CN 01231995U CN 2500041 Y CN2500041 Y CN 2500041Y
- Authority
- CN
- China
- Prior art keywords
- amplifier chip
- mobile phone
- switch element
- pin
- links
- 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
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
- Telephone Set Structure (AREA)
Abstract
A hand-free receiver for mobile phones mainly comprises a shell, a control circuit board placed in the shell and a voice conductor. The voice conductor is connected with the signal input pin of the amplifier chip on the control circuit board. The control circuit board is mainly composed of such elements as a amplifying circuit, a switch element, an amplifier chip, a speaker, and so on; the input end of the amplifying circuit receives the high-frequency signal of mobile phones via the antenna, and the signal output end thereof is connected with the switch element to control the turn-on or the turn-off of the switch element; the power supply pin of the amplifier chip is connected with the system working power via the switch element, and the speaker is connected between the output pin of the amplifier chip and the ground. When one dials the mobile phone number, the high-frequency of the mobile phone is amplified by the amplifying circuit to cause the switch element on the control circuit board to close and the amplifier chip to work. The voice conductor equipped beside the earpiece of the mobile phone amplifies the audio signal of the mobile phone by the amplifier chip, and then the audio signal is broadcast by the speaker, realizing the goal of the utility model.
Description
Technical field
The utility model relates to the hands-free device of answering of a kind of mobile phone.
Background technology
Along with the development of communication career, mobile phone more and more becomes the communication tool of people's indispensability.When mobile phone brings convenience to people, also bring some disasters.According to incompletely statistics, the driver is when driving, and the traffic accident that causes because of answering cell phone happens occasionally, and loss is serious.Be the generation that avoids traffic accident, some driver has worn earphone, when it prevents to receive calls on the one hand, mobile phone is to the electromagnetic radiation of human brain, prevent on the other hand because of receiving calls for a long time, hand departure direction dish causes traffic accident, and still, this mode can not fundamentally solve the problem that causes a large amount of traffic accidents because of answering cell phone.
Summary of the invention
In view of the foregoing, the purpose of this utility model provides the hands-free device of answering of a kind of mobile phone, and this answers device and mobile phone is used, behind the cell phone incoming call, hands-freely answer the device broadcast of will sending a telegram here automatically, remove the staff operating process from, thereby cause traffic accident owing to receive calls.
For achieving the above object, the utility model is taked following design: the hands-free device of answering of this mobile phone, and it comprises that mainly a housing, is positioned over a control circuit board and the sound conduction device in the housing; Described sound conduction device is placed near the earpiece; Described control circuit board mainly is made of components and parts such as amplifying circuit, switch element, amplifier chip and loud speakers; The input of amplifying circuit is by the high-frequency signal of antenna reception mobile phone, and its signal output part links to each other with switch element, the conducting of control switch element or shutoff; The power pin of amplifier chip links to each other with the system works power supply by switch element, is connected with a loud speaker between the output pin of amplifier chip and the ground; Described sound conduction device links to each other with the signal input tube pin of amplifier chip.
Switch element is a relay in the utility model.Amplification circuits on the described control circuit board has mainly comprised several triodes, resistance, electric capacity and the diode of amplification; The input of amplifying circuit, promptly the base stage of triode is by the high-frequency signal of antenna reception mobile phone, and the output of amplifying circuit is that the collector electrode of triode links to each other with the coil of relay; The power pin of amplifier chip links to each other with the system works power supply by the normally opened contact of relay, and whether the control amplifier chip works; Described sound conduction device links to each other with the input pin of amplifier chip by adjustable resistance, resistance, electric capacity; Be connected with described loud speaker between the signal output pin of amplifier chip and the ground.
Because the utility model adopts the above technical scheme, amplifying circuit on the control circuit board receives the high-frequency signal of mobile phone by antenna, according to the high-frequency signal that whether receives mobile phone, promptly whether the someone dials this phone number, the conducting of control switch element or shutoff; Further whether the amplifier chip on the decision control circuit board works.When the people dialed this phone number, the high-frequency signal of mobile phone made the switch element closure on the control circuit board, amplifier chip work through the amplification of amplifying circuit.Simultaneously, be arranged on the other sound conduction device of earpiece, broadcast by loud speaker with the amplification of the audio signal of mobile phone by amplifier chip, the sound of earpiece is amplified, so the utlity model has the broadcast of to send a telegram here automatically, remove people's manual manipulation from, the advantage of automatic switching.In addition, the utility model also have anti-interference, sound is clear, noiseless characteristics.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
The hands-free device of answering of the utility model mobile phone mainly comprises a housing, is positioned over a control circuit board and a sound conduction device in the housing.Control circuit board mainly is made of components and parts such as amplifying circuit 1, switch element (relay J), amplifier chip IC and loud speaker D.
As shown in the figure, amplifying circuit 1 part has mainly comprised triode Q1～Q4, resistance R 1～R9, capacitor C 1～C3 and diode D1, the D2 etc. of amplification.The input of amplifying circuit, promptly the base stage of triode Q1 is by the high-frequency signal of antenna L1, L2 reception mobile phone, and the output of amplifying circuit is that the collector electrode of triode Q4 links to each other with the coil of relay J.
The power pin 6 of amplifier chip IC (LM386) links to each other control IC work whether by the normally opened contact K1 of relay J with system works power supply VCC.Sound conduction device MIC links to each other with the input pin 3 of IC by adjustable resistance W, C5, C6, R13.Be connected with a loud speaker D between the signal output pin 5 of amplifier chip IC and the ground.Between the pin 4 and 5 of IC, connect R14 and C9 with low-frequency compensation effect; Between the pin 7 of IC and ground, be connected with anti-self-excitation, anti-interference capacitor C10; Between the pin one and 8 of IC, be connected with gain coupled circuit C7 and R12, regulate the resistance scalable gain of the present utility model of C7 and R12.
When other people dialed this Mobile Directory Number, the mobile phone high-frequency signal was coupled to the base stage of triode Q1 through antenna L1, L2, D1, C1.After Q1, Q2, Q3 amplify, again after the D2 rectification, the Q4 conducting, relay J gets electric adhesive.The normally opened contact K1 closure of relay J, amplifier chip IC gets electric, after the connection, answers device for the utility model is hands-free working power is provided, and the IC chip is started working.The audio signal of mobile phone is by being arranged on the signal input tube pin 3 that earpiece other sound conduction device MIC, W, C5, C6, R13 are sent to IC, after its inner amplifying unit processing, broadcast by the loud speaker D that links to each other with signal output pin 5, amplified the sound of earpiece, finish whole course of work of the present utility model, realize goal of the invention of the present utility model.
After having answered cell phone incoming call, the high-frequency signal of mobile phone disappears, and triode Q1～Q4 ends, the relay J outage, and normally opened contact K1 is short to be opened, and the IC outage quits work, and loud speaker D stops sounding.
The utility model universal amplifier chip IC adopts the miniature veneer chip of LM-386N-1 type of National Semiconductor's outlet.
The above only is preferred embodiment of the present utility model, and any equivalent transformation based on technical solutions of the utility model all belongs within the utility model protection range.
Claims (4)
1, the hands-free device of answering of a kind of mobile phone is characterized in that: it comprises that mainly a housing, is positioned over a control circuit board and the sound conduction device in the housing; Described sound conduction device is placed near the earpiece;
Described control circuit board mainly is made of components and parts such as amplifying circuit, switch element, amplifier chip and loud speakers; The input of amplifying circuit is by the high-frequency signal of antenna reception mobile phone, and its signal output part links to each other with switch element, the conducting of control switch element or shutoff; The power pin of amplifier chip links to each other with the system works power supply by switch element, is connected with a loud speaker between the output pin of amplifier chip and the ground;
Described sound conduction device links to each other with the signal input tube pin of amplifier chip.
2, the hands-free device of answering of mobile phone according to claim 1, it is characterized in that: described switch element is a relay.
3, the hands-free device of answering of mobile phone according to claim 1 and 2, it is characterized in that: the amplification circuits on the described control circuit board has mainly comprised several triodes, resistance, electric capacity and the diode of amplification; The input of amplifying circuit, promptly the base stage of triode is by the high-frequency signal of antenna reception mobile phone, and the output of amplifying circuit is that the collector electrode of triode links to each other with the coil of relay;
The power pin of amplifier chip links to each other with the system works power supply by the normally opened contact of relay, and whether the control amplifier chip works; Described sound conduction device links to each other with the input pin of amplifier chip by adjustable resistance, resistance, electric capacity; Be connected with described loud speaker between the signal output pin of amplifier chip and the ground.
4, the hands-free device of answering of mobile phone according to claim 3 is characterized in that: described amplifier chip adopts the miniature veneer chip of LM-386N-1 type of National Semiconductor's outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01231995 CN2500041Y (en) | 2001-08-23 | 2001-08-23 | Hand-free receiver of mobile phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01231995 CN2500041Y (en) | 2001-08-23 | 2001-08-23 | Hand-free receiver of mobile phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2500041Y true CN2500041Y (en) | 2002-07-10 |
Family
ID=33646157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01231995 Expired - Fee Related CN2500041Y (en) | 2001-08-23 | 2001-08-23 | Hand-free receiver of mobile phone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2500041Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106954137A (en) * | 2017-01-04 | 2017-07-14 | 上海傅硅电子科技有限公司 | A kind of double mode drive device for loudspeaker |
-
2001
- 2001-08-23 CN CN 01231995 patent/CN2500041Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106954137A (en) * | 2017-01-04 | 2017-07-14 | 上海傅硅电子科技有限公司 | A kind of double mode drive device for loudspeaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7774030B1 (en) | Hands-free device | |
| US7647080B1 (en) | Hands-free device | |
| CN201349217Y (en) | Bluetooth headset jack | |
| US20050190932A1 (en) | Streophonic apparatus having multiple switching function and an apparatus for controlling sound signal | |
| US7096047B2 (en) | Electronic audio accessory for use with automotive stereo loudspeakers | |
| CN2500041Y (en) | Hand-free receiver of mobile phone | |
| CN201197139Y (en) | Telephone vehicle-mounted receiving device | |
| CN2444363Y (en) | Hand free earphone of handset for vehicle | |
| CN2772163Y (en) | Ear microphone | |
| CN220755033U (en) | Horn loudspeaker with intercom function | |
| CN2337730Y (en) | Wireless switching and telecommunicating controller | |
| CN2185958Y (en) | Intercom by using broadcasting line communication | |
| CN217037361U (en) | Five-party intercom system for elevator | |
| CN2172931Y (en) | Wired electronic interphone | |
| CN2425462Y (en) | Cordless telephone set capable of receiving television audio | |
| CN2135220Y (en) | Earphone | |
| CN2319967Y (en) | Telephone with self-jamming for preventing line wiretapping | |
| CN2423690Y (en) | Mobile telephone with radio | |
| CN2146088Y (en) | Power amplification protection alarm for radio station | |
| JP3072506U (en) | Mobile phone hands-free device with radio function | |
| CN201048394Y (en) | Single-key dialing communicator | |
| CN2629372Y (en) | Visual intercom | |
| CN206743500U (en) | Line control earphone | |
| JPH04156033A (en) | Radio conversation device with telephone line connection function for person hard of hearing | |
| CN2128808Y (en) | Duplex wire intercom machine |
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 |