CN2269026Y - Earphone type FM stereo radio - Google Patents
Earphone type FM stereo radio Download PDFInfo
- Publication number
- CN2269026Y CN2269026Y CN 96203640 CN96203640U CN2269026Y CN 2269026 Y CN2269026 Y CN 2269026Y CN 96203640 CN96203640 CN 96203640 CN 96203640 U CN96203640 U CN 96203640U CN 2269026 Y CN2269026 Y CN 2269026Y
- Authority
- CN
- China
- Prior art keywords
- earphone
- wiring board
- stereo
- receiver box
- radio
- 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
- 238000012856 packing Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000011165 3D composite Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
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- Structure Of Receivers (AREA)
Abstract
A earphone-type radio set features that a circuit board is installed to one side of earphone, a power supply box is installed to another side of earphone, and the earphone is equipped with telescopic antenna, tuner, volume potentiometer, channel regulating indicator, charging socket, charging indicator and power switch. The said radio is a stereo FM radio with small volume and assembled by chip elements.
Description
The utility model relates to a kind of broadcast receiver, particularly is contained in the broadcast receiver in the earphone.
That broadcast receiver has is desk-top, pocket, walkman etc., and the utility model is near the walkman broadcast receiver.General walkman broadcast receiver, its earphone separates with broadcast receiver, and they couple together with the Thin cable bundle of lines.Bring some inconvenience to use like this.
The purpose of this utility model, the radio devices, the broadcast receiver parts that provide a kind of earphone-type are contained in the earphone, have solved earphone and have separated with broadcast receiver.Bring convenience to the user.
The purpose of this utility model is to realize like this, at one side of earphone receiver box the broadcast receiver wiring board is installed, another side is installed power pack, line strands of electric cables between them, the ring of wearing by earphone connects, and also is provided with devices such as channel selection adjuster, mains switch, volume adjuster, small size antenna, charging socket, channel selection indication and charging indication on earphone.
The utility model only need on earphone, to install power pack and wiring board with regard to solved well earphone and broadcast receiver he from problem.
Accompanying drawing 1: be right side view of the present utility model.
Accompanying drawing 2: be left side view of the present utility model.
Accompanying drawing 3: be the utility model electrical schematic diagram.
Below in conjunction with accompanying drawing, describe the details and the working condition of the concrete device that the utility model proposes in detail.
A kind of earphone-type fm stereo radio, form by earphone and fm stereo radio, it is characterized in that telescopic antenna (1), volume adjuster (3), channel selection tuner (4), tuning indication class (5) is contained in above the receiver box (2), in the receiver box (2), wiring board and Microspeaker (9) are housed, in the receiver box (6) of earphone another loudspeaker (9) and power pack are housed, mains switch (10) is equipped with in its outside, charging socket (11), charging indicator light (12), power supply and wiring board, loudspeaker were finished with being connected by strands of electric cables (13) of wiring board, strands of electric cables (13) is installed along the ring (7) of wearing of earphone.
Its line characteristics is that its circuit adopts Philips company's T DA series integrated package and surface mount elements assembling, receive the TDA7021T integrated circuit that integrated package adopts week in the exempting from of monolithic, the stereo decoding circuit adopts the TDA7040 integrated circuit, amplifying circuit adopts the TDA7050T integrated circuit, its wiring board volume is little, in its receiver box of can packing into.
TDA7021T is all FM reception integrated packages during monolithic is exempted from, the signal that antenna 6 receives is through 13 pin of C3 input TDA7021,5 pin connect the LC loop, regulate C4, can change receive frequency, three-dimensional composite signal is exported via C12 by 14 pin, R1, the 8th pin of the compensating circuit input decoding integrated package TDA7040T that C13 forms, stereo and monophony switching levels is controlled the 7th pin that is exported to TDA7040 by the 9th pin of TDA7021, realizes monophony and stereo automatic switchover, two pin of stereophonic signal TDA7040T export 2 of the integrated merit DA7050T of power amplifier to, 3 two pin, amplified signal is connected to a left side by 6,7 two pin, the R channel loudspeaker.
Further the utility model is further described with example below, the scope of frequency is received in elder generation's transfer during debugging, promptly C4 is transferred to maximum, stirs electric coil L1 turn-to-turn distance then.Make its signal that can receive 87MHz, look for a stereo fm platform again, regulate R6 and resistance R 1, make stereophonic signal the most clear melodious, debugging is promptly accused and is finished.
Only needing during charging that the dc power plug of 3V is inserted charging jack 10 gets final product.
Pull out antenna during use earlier, earphone is worn on the head, turn on the power switch, and it is moderate that the volume adjusting knob is adjusted to volume, regulates station selector again, receive FM radio station signal and careful fine tuning, make upright this acoustical signal the most clear melodious.
Claims (2)
1, a kind of earphone-type fm stereo radio, form by earphone and fm stereo radio, it is characterized in that telescopic antenna (1), volume adjuster (3), channel selection tuner (4), tuning indication class (5) is contained in above the receiver box (2), in the receiver box (2), wiring board and Microspeaker (9) are housed, in the receiver box (6) of earphone another loudspeaker (9) and power pack are housed, mains switch (10) is equipped with in its outside, charging socket (11), charging indicator light (12), power supply and wiring board, loudspeaker were finished with being connected by strands of electric cables (13) of wiring board, strands of electric cables (13) is installed along the ring (7) of wearing of earphone.
2, earphone-type fm stereo radio as claimed in claim 1, its line characteristics is that its circuit adopts Philips company's T DA series integrated package and surface mount elements assembling, receive the TDA7021T integrated circuit that integrated package adopts week in the exempting from of monolithic, the stereo decoding circuit adopts the TDA7040 integrated circuit, amplifying circuit is adopted the TDA7050T integrated circuit, its wiring board volume is little, in its receiver box of can packing into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96203640 CN2269026Y (en) | 1996-02-01 | 1996-02-01 | Earphone type FM stereo radio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96203640 CN2269026Y (en) | 1996-02-01 | 1996-02-01 | Earphone type FM stereo radio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2269026Y true CN2269026Y (en) | 1997-11-26 |
Family
ID=33889172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96203640 Expired - Fee Related CN2269026Y (en) | 1996-02-01 | 1996-02-01 | Earphone type FM stereo radio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2269026Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7477120B2 (en) | 2001-08-13 | 2009-01-13 | Bose Corporation | Transformer shielding |
-
1996
- 1996-02-01 CN CN 96203640 patent/CN2269026Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7477120B2 (en) | 2001-08-13 | 2009-01-13 | Bose Corporation | Transformer shielding |
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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 |