JPH026326Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention enables selection of the differential value to a desired value with respect to the set reference value in ammeters, voltmeters, thermometers, hygrometers, pressure gauges, etc. Regarding the adjustment device, each of the above-mentioned instruments functions as a control switch that captures an event change in the object to be measured and returns it to a set reference value.

[Problems with conventional technology]

Conventionally, many electrical control means using variable resistors have been proposed for this type of differential adjustment device, but the circuit configuration is complicated, the operation of setting the resistance value is troublesome, and it is difficult to accurately adjust the differential. There was a problem that allencial adjustment was difficult.

[Means for solving problems]

The present invention solves the above-mentioned drawbacks, and its means include a pair of adjusting plates with a photomicrosensor and long holes, and inserting the photomicrosensors into the long holes of the adjusting plates to adjust the opening angle of the adjusting plates. The instrument includes an angle adjustment piece having a pair of variable protrusions, a presser plate that cooperates with the angle adjustment piece to clamp the adjustment plate, and a reference value setting lever that is pivotally supported in an overlapping state with each base of the adjustment plate. The instrument is equipped with a photo-sensing plate on the front of the scale plate, and the instrument pointer is equipped with a photo-sensing plate that cooperates with the photo-micro sensor.

[Effect]

By moving the angle adjustment piece up and down, the opening angle of the pair of adjustment plates is adjusted to the desired angle (differential value) with a protrusion that slides up and down in the long hole of the adjustment plate, and then held by the holding plate. Fix it.

Rotate the adjustment plate and reference value setting lever to set the setting lever to the desired reference value.

As the meter pointer moves, the photo sensing plate moves and is sensed by the photo micro sensor, which is set at a differential value of ± with respect to the reference value, and a control device installed separately so that the reference value is reached. Activate.

〔Example〕

An embodiment in which the differential adjustment device of the present invention is incorporated into a thermometer will be described with reference to the drawings.

FIG. 1 shows a front view of the main parts, in which 1a and 1b are photomicro sensors attached to a pair of adjustment plates 2a and 2b whose opening angle a can be adjusted, and 19 is the adjustment plate 2a and 2b. 3 is a reference temperature setting lever having a pointer 4, and 10 is a bracket to which the adjustment plates 2a, 2b and the reference temperature setting lever 3 are mounted.

As shown in FIG. 2, the adjustment plates 2a and 2b have square holes b into which photomicrosensors 1a and 1b are attached, and elongated holes c.

FIG. 3 shows an exploded perspective view of a jig for determining and fixing the opening angle a of the adjustment plates 2a and 2b, and shows a pair of protrusions 18 provided on the angle adjustment piece 17 on the adjustment plates 2a and 2b.
2b is inserted into the elongated hole c from the back side, a presser plate 19 having a hole 19a into which the protrusion 18 is inserted is brought into contact with the surface, and the nut 20 and the screw 21 are used to clamp and fasten the holding plate 19.

Therefore, as will be described later, the adjustment plates 2a and 2b, on which the bases 2c and 2d are pivotally supported in an overlapping state, can be adjusted by moving the protrusion 18 up and down in the elongated hole c as the angle adjustment piece 17 moves up and down. Protrusion R of piece 17
also move the square hole S of the reference temperature setting lever 3 up and down),
The opening angle a can be adjusted arbitrarily.

FIG. 4 shows a perspective view of the reference temperature setting lever 3, which has a pointer 4 and the angle adjustment piece 17.
A square hole S is provided into which a projection R provided in the housing is slidably fitted.

FIG. 6 shows a side view of a state in which the pair of adjustment plates 2a, 2b and the reference temperature setting lever 3 are assembled. 2b and the reference temperature setting lever 3, and screw the screw shaft 5 onto the reference temperature setting lever 3.
A washer 11 and a spring 12 are inserted from the surface side of the bracket 10, and a presser nut 13 is screwed together, and a knob 14 is screwed together with the presser nut 13 in a double nut type.

Therefore, depending on the tightness of the presser nut 13, the rotational resistance of the adjusting plates 2a, 2b and the reference temperature setting lever 3 with respect to the bracket 10 can be adjusted appropriately by the compressive repulsive force of the spring 12, and adjusted by rotating the knob 14. The plates 2a, 2b and the reference temperature setting lever 3 can be integrally rotated to a desired position, and the position can be secured.

In addition, on the instrument body mounting board 9, a rotating shaft 2 is attached to a temperature sensing bimetal 15 formed in a spiral shape.
2 is supported, and a pointer 6 of a thermometer having a photo sensing plate 7 shown in FIG. 5 is fixed to the rotating shaft 22.

Note that 8 is a temperature scale plate, and 16 is a transparent cover.

Therefore, adjust the opening angle of the adjustment plates 2a and 2b to the desired differential value using the angle adjustment piece 17, fix it with the presser plate 19, nut 20, and screw 21, and turn the knob 14 to obtain the desired differential value. When the pointer 4 of the setting lever 3 is set to the reference temperature (for example, 20° C. in FIG. 1), the pair of adjusting plates 2a and 2b also rotate at the same time, and as the pointer 6 moves by temperature sensing of the bimetal 15, a photo is detected. As the plate 7 moves, the photomicrosensors 1a, 1b are activated at differential values of ± with respect to the reference temperature, and a separately installed control device is activated to return the temperature to the reference temperature.

Although the case of a thermometer has been described above, it is clear that the differential adjustment device of the present invention can be implemented in the various instruments mentioned above.

〔effect〕

As described above, in the present invention, the opening angle of the pair of adjustment plates can be adjusted by mechanical means, so the differential value can be arbitrarily selected with simple operation, and the photomicro Since the accuracy of the sensor is good, it is possible to control the sensor to within ±0.1 to 0.2%, which can improve usability and accuracy.

[Brief explanation of the drawing]

Fig. 1 is a front view of the main parts of an embodiment in which the present invention is installed in a thermometer, Fig. 2 is a perspective view of the adjustment plate, Fig. 3 is an exploded perspective view of the opening angle adjustment part of the adjustment plate, and Fig. 4 is FIG. 5 is a perspective view of the reference temperature setting lever, FIG. 5 is a front view of the thermometer pointer, and FIG. 6 is a partially cutaway sectional view of FIG. 1a, 1b...Photomicrosensor, 2
a, 2b...Adjustment plate, 3...Reference temperature setting lever, 6...Thermometer pointer, 7...Photo sensing plate, 1
7... Angle adjustment piece, 18... Protrusion, 19... Presser plate.

Claims (1)

[Scope of utility model registration request] A differential adjustment device installed on the front of the scale plate of various instruments, a pair of adjustment plates with a photomicro sensor attached and a long hole,
An angle adjustment piece having a pair of protrusions that is inserted into the long hole of the adjustment plate and changes the opening angle of the adjustment plate; a presser plate that cooperates with the angle adjustment piece to clamp the adjustment plate; and each of the adjustment plates. A differential adjustment device comprising a reference value setting lever pivotally supported in an overlapping state with a base, and an instrument pointer having a photo sensing plate that cooperates with the photo micro sensor.