CN2755743Y

CN2755743Y - Optical film potentiometer

Info

Publication number: CN2755743Y
Application number: CN 200420097334
Authority: CN
Inventors: 蒯晓雷
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-10-25
Filing date: 2004-10-25
Publication date: 2006-02-01
Anticipated expiration: 2014-10-25

Abstract

The utility model relates to an optical film potentiometer. A moving member and a supporting member are clearance fit; the moving member and the supporting member are respectively connected with a light-transmitting film and a photoelectric emitter/receiver. An emitting end and a receiving end of the photoelectric emitter/receiver are relatively positioned at both side of the film. Along a moving direction of the film when working, the light-transmitting degree of the film is in the law that linearity gradually weakens. The utility model has the advantages of no working abrasion, high sensitivity, wide regulating range, long service life and low cost.

Description

Light membrane type potentiometer

Technical field

The utility model relates to the potentiometer in the electric elements, specifically a kind of smooth membrane type potentiometer.

Background technology

Potentiometer is widely used on much electric, the electronic equipment as a kind of electric elements.Existing potentiometer is film type carbon or wire wound normally, they are by different change its resistances of its contact with carbon membrane or resistance wire contact position, existing problem is, the contact of existing potentiometer in use for some time, have wear phenomenon, can cause loose contact thus, and then cause the output signal instability.

The utility model content

The purpose of this utility model is to provide a kind of contactless, no service wear, highly sensitive light membrane type potentiometer.

For achieving the above object, the utility model adopts following scheme: light membrane type potentiometer, one movement parts and a supporting member matched in clearance, movement parts, supporting member respectively with the film of printing opacity, the photoelectric emission receiver connects, the transmitting terminal of photoelectric emission receiver, receiving terminal is located opposite from two sides of film, reciprocating motion that can be relative between movement parts and the supporting member or rotatablely move, the direction of motion of self when film is worked, the printing opacity degree of film is the linear rule that weakens gradually, that is to say, another direction of motion of self when film is worked, the printing opacity degree of film are the linear rule that strengthens gradually.Motion mode when working according to film, the shape of film can be rectangle or circle.

Owing to have optical transmitting set respectively in the transmitting terminal of photoelectric emission receiver and the receiving terminal, optical receiver, the light signal that optical transmitting set is launched is received by optical receiver after seeing through film, and when film is worked the direction of motion of self, the printing opacity degree of film is the linear rule that weakens gradually, therefore, relative motion takes place between movement parts and supporting member, make when also forming relative motion between film and photoelectric emission receiver, what the light signal meeting that the optical transmitting set that optical receiver receives is launched was linear weakens gradually or strengthens gradually, like this, the conducting meeting of photoelectric emission receiver output is reducing gradually of linearity or increases.This shows that by making reciprocating motion relative between movement parts and the supporting member or rotatablely moving, this potentiometer can be realized the adjusting of resistance.

The utility model does not have service wear, and is highly sensitive, and adjustable range is wide, effective, long service life, and also cost is lower than existing potentiometer.

Description of drawings

The plane graph of Fig. 1 the utility model embodiment one used film;

The structure chart of Fig. 2 the utility model embodiment one;

Fig. 3 Fig. 2 removes the vertical view behind cover cap and the top cap;

The structure chart of cover cap among Fig. 4 Fig. 2;

The plane graph of Fig. 5 the utility model embodiment two used films;

The structure chart of Fig. 6 the utility model embodiment two;

The vertical view of Fig. 7 Fig. 6;

Fig. 8 electrical schematic diagram of the present utility model.

Embodiment

Further specify the utility model below in conjunction with embodiment and accompanying drawing.

Embodiment one

Referring to Fig. 1, film is circular, with any radius of film be the boundary begin, along a circumferential direction of film, the printing opacity degree of this film is the linear rule that weakens gradually.The motion in this kind film when work is a circular motion, and its direction of motion has clockwise, counterclockwise.As seen from Figure 1, be that boundary begins with vertical radius R, clockwise along film circumferentially, the weakening gradually of the printing opacity degree linearity of film, otherwise, counterclockwise along film circumferentially, the enhancing gradually of the printing opacity degree linearity of film.

Referring to Fig. 2, the utility model is if adopt film shown in Figure 1, and it is constructed as follows: movement parts is a rotating shaft 1, and supporting member is a pedestal 2, and rotating shaft 1 is contained on the pedestal 2, the two is matched in clearance.Film 4 connects with the upper end of rotating shaft 1 by the through hole at its middle part, at the top of rotating shaft 1 dress crown cap 5.Photoelectric emission receiver 6 is connected on the pedestal 2, and the transmitting terminal 6a of photoelectric emission receiver 6, receiving terminal 6b are located opposite from two sides of film 4, has optical transmitting set, optical receiver respectively in the transmitting terminal 6a of photoelectric emission receiver 6, the receiving terminal 6b.Have a groove 2a on the pedestal 2, a screw 8 passes groove 2a and connects with photoelectric emission receiver 6, by screw 8 photoelectric emission receiver 6 is connected on the pedestal 2.In addition, be connected with a cover cap 3 on pedestal 2 tops, cover cap 3 coats the boss 3a matched in clearance of the top of top cap 5 and cover cap 3 inboards with film 4, photoelectric emission receiver 6.Cover cap 3 adopts sheet metal.The pin 7 of photoelectric emission receiver 6 stretches out outside the cover cap 3.

Referring to Fig. 3, have keyway 4a in the central hole of film 4, the edge of the upper end of rotating shaft 1 is installed with key 1b, by cooperating of keyway 4a and key 1b, can realize connecting of film 4 and rotating shaft 1.Rotating shaft 1 angle clockwise at work or that be rotated counterclockwise is no more than 360 °.For realizing the restriction of rotating shaft 1 anglec of rotation, be installed with a lug 1a at the edge of rotating shaft 1 upper end, the corresponding boss 9 that is provided with on the upper surface of pedestal 2.When rotating shaft 1 rotates counterclockwise position shown in the figure, block lug 1a, realize the restriction of rotating shaft 1 anglec of rotation by boss 9.Shown in the figure, lug 1a and boss 9 against the time, the light transmittance maximum of film 4 is facing to transmitting terminal, the receiving terminal of photoelectric emission receiver 6.In addition, for connecting cover cap, have gap 2b at the edge of pedestal 2.

By Fig. 2, Fig. 3 as seen, the effect of groove 2a is to make position radially can regulate along film 4 of photoelectric emission receiver 6.

By Fig. 1, Fig. 2 as seen, on film 4, mark off some ring rings, the rule of the printing opacity degree change of each track is identical, but the printing opacity degree of every track has difference, along the position of radially adjusting photoelectric emission receiver 6 of film 4, the utility model is the resistance of several different range of scalable.

In conjunction with Fig. 1, Fig. 2, have optical transmitting set, optical receiver respectively in the transmitting terminal 6a of photoelectric emission receiver 6, the receiving terminal 6b, the light signal that optical transmitting set is launched sees through film 4 backs and is received by optical receiver, when film 4 is rotated counterclockwise by rotating shaft 1 drive, because the printing opacity degree of film 4 is the linear rule that weakens gradually along clockwise direction, linear the weakening gradually of light signal meeting that the optical receiver of photoelectric emission receiver 6 receives, the meeting of photoelectric emission receiver 6 output conductings is linear reducing gradually; Otherwise, when film 4 clockwise rotates, because the printing opacity degree of film is the linear rule that strengthens gradually in the counterclockwise direction, the linear enhancing gradually of light signal meeting that the optical receiver of photoelectric emission receiver 6 receives, the conducting meeting of photoelectric emission receiver 6 outputs is linear increase gradually.This shows that by the rotation of rotating shaft 1 clockwise, counterclockwise two directions, this potentiometer can be realized the adjusting of resistance.

Referring to Fig. 4 in conjunction with Fig. 3 as seen, the bottom of cover cap 3 is provided with and the corresponding dog 3b of gap 2b on pedestal 2 edges, is stuck among the gap 2b by dog 3b bending, and cover cap 3 is connected with pedestal 2.

Embodiment two

Referring to Fig. 5, film is a rectangle, the printing opacity degree of film along himself longitudinally a direction be linearity and weaken rule gradually.The motion in this kind film when work is a rectilinear motion, and its direction of motion is along himself vertical straight line to the left or to the right.As seen from Figure 5, along film direction left, the weakening gradually of the printing opacity degree linearity of film, otherwise, along film direction to the right, the enhancing gradually of the printing opacity degree linearity of film.

Referring to Fig. 6, Fig. 7, the utility model is if adopt film shown in Figure 5, it is constructed as follows: supporting member is the housing 10 with cavity, the chute 10b that has a groove 10c on the housing 10 and communicate with it, and a light penetrating slit 10a who respectively has on the cell wall of two sides of chute 10b is toward each other.Photoelectric emission receiver 16 is connected in the outside of chute 10b cell wall, the transmitting terminal 16a of photoelectric emission receiver 16, receiving terminal 16b aim at two light penetrating slit 10a respectively, equally, have optical transmitting set, optical receiver respectively in the transmitting terminal 16a of photoelectric emission receiver 16, the receiving terminal 16b.Movement parts is a slide plate 14, and the top of slide plate 14 is connected with handle 13, and film 15 is connected in the bottom of slide plate 14.Slide plate 14, film 15 lay respectively among groove 10c and the chute 10b, slide plate 14 and groove 10c matched in clearance.The pad 12 of the tool groove 12a that slide plate 14 tops are coated with, pad 12 is arranged in groove 10c, and the material of pad 12 is a rubber.The outside of pedestal 10 is coated with the cover plate 11 of tool groove 11a.Handle 13 passes groove 12a, 11a.The pin 17 of photoelectric emission receiver 16 stretches out outside the pedestal 10.In addition, do not cross photoelectric emission receiver 16 when sliding with slide plate 14 for assurance film 15, the outside that is positioned at slide plate 14 2 ends in the bottom of chute 10c is installed with boss 18, can limit the sliding scale of slide plate 14 by boss 18.

In conjunction with Fig. 5, Fig. 6 as seen, stir handle 13, film 15 is during with slide plate 14 reciprocating motions, linear the weakening gradually or strengthen gradually of light signal meeting that the optical receiver of photoelectric emission receiver 16 is received, and then the conducting that makes photoelectric emission receiver 16 outputs is linear and reduces gradually or increase, this shows that this potentiometer reciprocatingly slides by slide plate 14, can realize the adjusting of resistance.

Referring to Fig. 8, by electrical schematic diagram of the present utility model as seen, the power of the light signal that the optical transmitting set A that the optical receiver B of described photoelectric emission receiver receives is launched depends on the printing opacity degree of film D.Two pin c, the e of optical receiver are connected on the needed electronic circuit, and this potentiometer promptly can be used as the adjusting of volume, voltage or electric current etc.

In addition, the film requirement light transmission among the embodiment one, two is good, toughness is high, and its material can be plastics.The formation of film printing opacity power can realize by in various degree covering light screening material on film.Used photoelectric emission receiver is an existing product in the utility model, for example, can adopt " π " shape optocoupler.

Claims

1, light membrane type potentiometer, it is characterized in that: a movement parts and a supporting member matched in clearance, movement parts, supporting member connect with film, the photoelectric emission receiver of printing opacity respectively, the transmitting terminal of photoelectric emission receiver, two sides that are positioned at film that receiving terminal is relative, the direction of motion of self when film is worked, the printing opacity degree of film are the linear rule that weakens gradually.

2, smooth membrane type potentiometer according to claim 1, it is characterized in that: film is for circular, any radius with film is that the boundary begins, along a circumferential direction of film, the printing opacity degree of film is the linear rule that weakens gradually, movement parts is a rotating shaft, supporting member is a pedestal, rotating shaft is contained on the pedestal, film connects with the upper end of rotating shaft by the through hole at its middle part, has a groove on the pedestal, and a screw passes groove and connects with the photoelectric emission receiver, the edge of rotating shaft upper end is installed with a lug, the corresponding boss that is provided with is connected with a cover cap on pedestal top on the upper surface of pedestal, and cover cap is with film, the photoelectric emission receiver coats.

3, smooth membrane type potentiometer according to claim 1, it is characterized in that: film is a rectangle, the printing opacity degree of film along himself longitudinally direction be the linear rule that weakens gradually, supporting member is the housing with cavity, the chute that has a groove on the housing and communicate with it, a light penetrating slit that respectively has on the cell wall of two sides of chute toward each other, the photoelectric emission receiver is connected in the outside of chute cell wall, the transmitting terminal of photoelectric emission receiver, receiving terminal is aimed at two light penetrating slits respectively, movement parts is a slide plate, the top of slide plate is connected with handle, film is connected in the bottom of slide plate, slide plate, film lays respectively in groove and the chute, and slide plate top is coated with the pad of tool groove, pad is arranged in groove, and the outside of pedestal is coated with the cover plate of tool groove.