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a non-contact radio

A non-contact, radio technology, used in electrical components, transmission systems, etc., can solve the problems of varistor resistance film wear, noise, dust easily falling, etc., and achieve the effect of prolonging the service life.

Active Publication Date: 2017-03-29
嘉善罗星创业投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Common FM radios in life often use potentiometers to adjust the volume, that is, by adjusting the scribing on a sliding rheostat, the current inside the radio is changed to achieve volume adjustment; long-term use will wear out the resistance film on the rheostat. , the outside dust is also easy to fall on the resistive film, making noise when adjusting the volume

Method used

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Examples

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Embodiment

[0015] exist Figure 1 to Figure 3 In the described embodiment, the non-contact radio includes an energized solenoid 1, and the cylindrical shell of the solenoid 1 is made of a heat-conducting material; as image 3 As shown, the density of the coil turns of the solenoid 1 decreases along the axial direction of the solenoid; inside the solenoid 1, a transmission rod 2 movable in the axial direction is installed along the axis; the transmission rod 2 is fixed with a Hall element 3; the Hall element 3 is electrically coupled to a volume control module (not shown in the figure) located outside the solenoid 1; the volume control module is a power amplifier module, the Hall element 3 is coupled to the bias end of the power amplifier module, and the audio source of the radio is coupled to the signal end of the power amplifier module, the induced current output by the Hall element 3 determines the bias voltage of the bias end, Thus, the amplification factor of the power amplifier mod...

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Abstract

The invention relates to a non-contact type radio which comprises a powered-on solenoid. The density of turns of the coil of the solenoid is decreased gradually along the axis of the solenoid. A transmission rod which can move in the axial direction is arranged along the axis in the solenoid. A magnetic field sensing element is fixed to the transmission rod. The magnetic field sensing element is electrically coupled to a volume control module arranged outside the solenoid. The magnetic field sensing element is not in contact with the solenoid. The non-contact type radio has a long service life, elements are not abraded, and the influence of dust on the non-contact type radio is small.

Description

technical field [0001] The invention relates to an electronic product, especially a radio. Background technique [0002] Common FM radios in life often use potentiometers to adjust the volume, that is, by adjusting the scribe on a sliding rheostat, the current inside the radio is changed to achieve volume adjustment; long-term use will wear out the resistive film on the rheostat. , External dust is also easy to fall on the resistive film, making noise when adjusting the volume. Contents of the invention [0003] In view of the above problems, the present invention provides a non-contact radio, which has a long service life, does not cause component wear, and is less affected by dust. [0004] In order to solve the above problems, the technical solution adopted in the present invention is: the non-contact radio includes an energized solenoid, and the density of the coil turns of the solenoid decreases along the axial direction of the solenoid; Inside, there is an axially ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16
Inventor 戴晓宸
Owner 嘉善罗星创业投资有限公司
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