CN2262764Y - Noiseless potentiometer - Google Patents
Noiseless potentiometer Download PDFInfo
- Publication number
- CN2262764Y CN2262764Y CN 96207116 CN96207116U CN2262764Y CN 2262764 Y CN2262764 Y CN 2262764Y CN 96207116 CN96207116 CN 96207116 CN 96207116 U CN96207116 U CN 96207116U CN 2262764 Y CN2262764 Y CN 2262764Y
- Authority
- CN
- China
- Prior art keywords
- potentiometer
- noiseless
- photoresistor
- photo
- shadow shield
- 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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- Adjustable Resistors (AREA)
Abstract
The utility model relates to a noiseless potentiometer, comprising a casing, a luminescent part, a shading plate and a photoresistor. The shading plate is positioned between the luminescent part and the photoresistor, and the photoresistor leads out both ends out of a main body as an end opening of the potentiometer. Through changing the luminous flux which irradiates on the photoresistor, the electric resistance value is changed. The utility model has the advantages of simple structure, small size, no noise, good electric control property, conveniently forming a multiple connection synchronous control form, good synchronous performance, and no increase of volume because of the multiple form, etc.
Description
The utility model belongs to adjustable resistor.
It is conventional that potentiometer/the electric attenuation device is carbon-film potentiometer or frame resistance device, lower powered carbon-film potentiometer has a carbon track and a sliding contact that moves on the carbon track, reach the potentiometer CN2043410U that reduces friction with contact resistance as No. 34 disclosed a kind of contact mechanism that improves of patent gazette the 5th volume, its shortcoming is in use, because contact force, the carbon track easily produces carbon powder, is easy to decrease part, produces additional electrical noise simultaneously.
The purpose of this utility model provides a kind of noiseless potentiometer of being made up of photo-resistor, shadow shield, light source.
The purpose of this utility model is achieved in that a kind of noiseless potentiometer, its primary structure is that it comprises housing, is arranged at luminescent device, shadow shield, photo-resistor composition in the housing, shadow shield is between luminescent device and photo resistance, and it is the potentiometer port that photo-resistor leads to the outer two ends of housing.Luminescent device is made up of light source or light-emitting diode.The occulter of shadow shield for moving along the housing cross-wise direction.Shadow shield is connected with housing by expansion screw.
Owing to change conventional potentiometer contact point mode, therefore can not bring the electrical noise that produces by the friction reason, and additional noise do not introduced in operation.This potentiometer can be expanded into multi-joint structure arbitrarily in certain volume simultaneously, and is littler than the multi-joint structural volume of conventional potentiometer.Because adopt photo resistance to combine with light source, this potentiometer can be controlled its operation by voltage/current, has characteristics such as convenience, practicality.
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the end view of Fig. 1.
Among the figure: 1, luminescent device, 2, shadow shield, 3, photo-resistor, 4, the potentiometer port, 5, shell.
Principle of the present utility model is as follows:
When photo resistance 3 received the different light amount of penetrating, the difference of its resistance a little less than with light intensity changed.When shadow shield 2 moved, the light that may command luminescent device 1 sends changed the luminous flux that acts on photo-resistor 3 simultaneously.Be that the photo-resistor resistance sizes changes with moving of shadow shield 2, realize the effect of potentiometer.Luminescent device 1, shadow shield 2, photo-resistor 3 are arranged in the shell 5, and the line that makes the photo resistance two ends draw housing is this potentiometer port 4.
Moving of shadow shield 2 can be controlled by expansion screw or rectilinear motion.Luminescent device is made up of light-emitting component such as bulb, light-emitting diode etc., also can be made of radioactive substance, can save the external power supply Vi that is connected with light-emitting component like this.
Under the situation of mobile shade 2 not, the brightness that changes luminescent device 1 also can change the resistance of photo resistance.Therefore, this potentiometer is automatically controlled potentiometer.
This potentiometer can be connected with computer/digital control system, has the advantage of traditional attenuator that is made of D/A, and control characteristic is more level and smooth, and eliminates because the high-frequency oscillation signal lotus root is closed the electrical interference signal of formation, has the buffer action of height with digital control system.
The multi-joint CONTROL VOLUME of conventional potentiometer is all greater than the simply connected form, and this potentiometer can constitute multi-joint Synchronization Control form easily, and net synchronization capability is good, and its volume does not increase because of multi-joint form.
Claims (4)
1, a kind of noiseless potentiometer, it is characterized in that it comprises housing, is arranged at luminescent device, shadow shield, photo-resistor composition in the housing, shadow shield is between luminescent device and photo-resistor, and it is the potentiometer port that photo-resistor leads to the outer two ends of housing.
2, noiseless potentiometer according to claim 1 is characterized in that luminescent device is made up of light source or light-emitting diode.
3, noiseless potentiometer according to claim 1 is characterized in that shadow shield is the occulter that can move along the housing cross-wise direction.
4, according to claim 1 or 3 described noiseless potentiometers, it is characterized in that shadow shield is connected with housing by expansion screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96207116 CN2262764Y (en) | 1996-03-27 | 1996-03-27 | Noiseless potentiometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96207116 CN2262764Y (en) | 1996-03-27 | 1996-03-27 | Noiseless potentiometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2262764Y true CN2262764Y (en) | 1997-09-17 |
Family
ID=33891506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96207116 Expired - Fee Related CN2262764Y (en) | 1996-03-27 | 1996-03-27 | Noiseless potentiometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2262764Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236450A (en) * | 2013-04-02 | 2013-08-07 | 吴思齐 | Variable resistor |
-
1996
- 1996-03-27 CN CN 96207116 patent/CN2262764Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236450A (en) * | 2013-04-02 | 2013-08-07 | 吴思齐 | Variable resistor |
| CN103236450B (en) * | 2013-04-02 | 2015-11-25 | 吴思齐 | Rheostat |
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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 |