CN2116269U

CN2116269U - Photoelectric volume control potentiometer

Info

Publication number: CN2116269U
Application number: CN 91223657
Authority: CN
Inventors: 耿建强
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-08-26
Filing date: 1991-08-26
Publication date: 1992-09-16

Abstract

The utility model discloses an audio frequency power amplifier volume potentiometer-photoelectric volume control potentiometer, characterized in that the utility model is improved only inside the cavity based on the current volume potentiometer that is used widely. The tailor-made tuning buttons (4) with the tonal gap (5) is made use of regulating light intensity of the photosensitive elements (2) projected by light tube (1) and the capacitor divider as well as the photosensitive elements (2) connected in series with the capacitor divider (3). As a result, the low signal voltage of the capacitor divider is output and the volume can be controlled.

Description

Photoelectric volume control potentiometer

A kind of audio power amplifier volume potentiometer-photoelectricity volume potentiometer.

At present, generally the volume potentiometer of Shi Yonging is still with elastic copper sheet contact fixed carbon resister and passes through to regulate its relative position control volume, uses serious wear for a long time, repairs and changes frequently, causes waste.Though and some novel potentiometers-electronic potentiometer use is also very convenient, its multicircuit complexity adopts element many.Comparatively speaking, failure rate, cost are just high.

The utility model is intended to solve the deficiency of above-mentioned volume potentiometer, volume potentiometer at present commonly used is improved, thereby produce the photoelectricity volume potentiometer of a kind of novel, contactless, long-life, low cost, less trouble.

For achieving the above object, only in volume potentiometer cavity commonly used at present, improve, utilize luminous tube and light-sensitive element, be equipped with the special tuning button (sheet) that is clipped between the two again, and regulate luminous tube by its and throw a little less than the light intensity on the light-sensitive element, the voltage divider of forming with the resistance of regulating it and series connection with it.Output to the low signal voltage of putting, thereby realize above-mentioned purpose.

Fig. 1 (vertical section schematic diagram) is the principle of photoelectricity volume potentiometer.It makes light source by luminous tube (1), the voltage divider (3) that the resistance of photosensitive tube (2) and series connection is with it formed is made recipient, special tuning button (sheet)-with respect to linear sliding potentiometer) (4) make the light adjuster, the light that luminous tube (1) sends is gone up the adjusting in the complete transparent tuning crack (5) that the spy puts by tuning button (4), make the light power of throwing photosensitive tube (2) in voltage divider adjusted, thereby regulated voltage divider (3) indirectly and outputed to low signal voltage size of putting, and then the variation of control volume.Owing to adopt photoelectricity coupling and special construction, add that component life is very long.Therefore, this novel photoelectric potentiometer has characteristics such as simple in structure, easy to manufacture, that cost is low, the life-span is long.The experiment proved that, regulate volume, level and smooth, noiselessness, functional with it.And, avoided present common potentiometer frequently to change the waste that causes because the life-span is long, the former common potentiometer switch sections (generally not fragile) that this meeting is abandoned obtains saving.It can be widely used in television set, radio-cassette player etc.There is certain economic to be worth and practicality.

In view of several forms of present conventional volume potentiometer, with respect to this, this photoelectricity volume potentiometer also has its corresponding new model and all based on above-mentioned principle of uniformity, design.

Show that as Fig. 2 (local vertical section) is the novel potentiometer of alternative present midget receiver volume potentiometer.(1) luminous tube; (2) photosensitive tube; (6) be one with the U type band card of the fixedly luminous tube (1) of potentiometer plastics cover one, (4) be special tuning button, (5) are the tuning crack that is arranged on the tuning button (4), the tuning button can be located at former potentiometer button relevant position.

Show that as Fig. 3 (local vertical section) is alternative desk-top at present, portable radio, the novel potentiometer of large-scale rotary switch volume potentiometer commonly used, (1) luminous tube; (2) photosensitive tube; (4) be the special tuning button of belt switch shift fork (6), on establish tuning crack (5), tuning button (4) be fixed on revolve the axle (7) on.

Its basic structure of novel potentiometer and Fig. 3 of showing the plug-type potentiometer that (local vertical section) alternative present black and white machine is commonly used as Fig. 4 are similar, just tuning button (4) is a matched in clearance with revolving axle (7), (8) be spacing card with potentiometer cover one, so that revolve axle during (7) push-and-pull, tuning button (4) axially is not shifted.

As Fig. 5 (end view) is the direct slide photopotentiometer, alternative present colour TV, the ordinary straight gliding style volume potentiometer that recorder is commonly used.(4) be the two symmetrical fully tuning sheets that form an angle, one end and substrate (6) flexibly connect, locate by axle (7), its other end has two semicircle holes that can become a complete sound regulating hole (5) relatively respectively, (8) be back-moving spring, a side has the small embossment (10) of the maximum angle of corresponding two tuning sheets (4) in the tuning handle (9), by the logical light quantity of its indirect regulation sound regulating hole (5), throw a little less than the light intensity on the light-sensitive element to regulate luminous tube, and then regulate volume.

As Fig. 6 (vertical section schematic diagram) is volume potentiometer commonly used at present.

To above-mentioned photoelectricity volume potentiometer, luminous tube, light-sensitive element should be on same axis.This axis and tuning crack center line (the sound regulating hole garden heart) intersect vertically (intersecting in a straight line) all the time, and both all should be provided with covers photo structure, tuning button (sheet) should be opaque, during manufacturing, can be according to particular design formula designing mould, luminous tube and light-sensitive element should be tried one's best near the tuning crack that is provided with on the tuning button.

Claims

A kind of audio power amplifier volume potentiometer-photoelectricity volume control potentiometer, it mainly contains voltage divider that the resistance of luminous tube, light-sensitive element and series connection with it forms and opaque tuning button three parts such as (or tuning sheets) in band tuning crack (or sound regulating hole), it is characterized in that: tuning button (or tuning sheet) is clipped between luminous tube and the light-sensitive element, the dead in line of luminous tube and light-sensitive element, vertical also by tuning crack (or sound regulating hole) center line (center).