JPS589295Y2 - variable electronic components - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to variable electronic components, and particularly to a rotating groove for adjusting variable electronic components such as variable resistors, variable inductances, and variable capacitances.

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＼( In general, we will promote miniaturization of these variable electronic components. □1.
If you do this, there is a tendency for the following adjustment operations to become more difficult.

As an example, the outer diameter of a semi-fixed variable resistor is 6 to 1rr.
When downsized to about vn, the length of the adjustment groove of the resistance adjustment rotor is limited to 4rIr1n or less.

However, in this case, commercially available screwdrivers with a blade width of less than 4 mm are rare.

For this reason, adjusting these small variable resistors required a small, narrow, dedicated screwdriver.

Furthermore, in electronic devices equipped with these variable electronic components, readjustment is required not only at the time of manufacture but also when the device is installed on-site, as the devices become more highly accurate electronic circuits. , these variable electronic components are also adjusted each time.

Therefore, it was inconvenient that a screwdriver dedicated to adjustment had to be provided at the installation location of the device.

For this reason, the above-mentioned inconvenience in handling was conventionally
The problem was solved by using two types of groove structures as shown in the figure.

In Fig. 1a, the rotor has a dug-in driver groove, and in this case, the adjustment rotation groove is mechanically strong in the lateral and rotational directions, and the driver does not slip or come off during adjustment. Although it has some advantages, it requires a small dedicated screwdriver for adjustment, which is inconvenient.

On the other hand, a rotor with open grooves at both ends as shown in Fig. 1 may be considered as an improvement to the inconvenience of the rotor with grooves, but in this case there are no restrictions on the driver. There are handling inconveniences such as the screwdriver slipping or coming off during adjustment, and the width of the adjustment rotation groove needs to be greater than the thickness of the tip of a large screwdriver, so the side wall of the rotation groove can absorb lateral and rotational forces. Each had their own drawbacks, such as being mechanically weak (and easily damaged).

In order to solve these drawbacks, the present invention provides an adjustment rotor that is equipped with a two-tier groove structure in the center of the rotor, with the upper groove having both ends open and the lower groove having a dug groove. The present invention provides a variable electronic component having the following characteristics.

□ Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 2 shows an embodiment of the adjusting rotor according to the present invention.

The material of the rotor is generally an electrically insulating material such as plastic mold, and the upper stage has grooves 1 with both ends open, and the lower stage has grooves 2 that are dug in for use with a small screwdriver.

3 is a part that corresponds to a part of the stopper provided on the outer case.

FIG. 3 shows an example in which the rotor according to the present invention is used in a general small variable resistor, and numeral 5 shows the rotor 4 held in an exterior metal case.

Reference numeral 6 denotes a spring mechanism which is in contact with the resistance board γ and has a structure in which it slides together with the rotor.

The open-end groove 1 is located above the outer case 5, and has a wider groove width than the dug-in groove 2 to prevent damage to the rotating groove.

As described above, the present invention has a structure in which the adjustment rotation groove of the variable electronic component is not limited by the size of the screwdriver, so that the adjustment operation can be improved.

In addition, according to the present invention, since the directions of both grooves are the same, there is an advantage that the rotation angle of the rotor can be easily determined compared to a cross-shaped groove, and furthermore, the direction in which the screwdriver is inserted can be confirmed without any confusion. It has a practical configuration that is very easy for adjustment workers to handle.

[Brief explanation of the drawing]

Figures 1a and b are plan views showing the rotor structure of a conventional variable electronic component, Figure 2 is a plan view showing the rotor structure of the present invention-embodiment, and Figure 3 is a plan view showing the rotor structure of the present invention in a small size. A sectional view of an embodiment used in a semi-fixed variable resistor is shown. 1: Both ends open type rotation groove, 2: Digged type rotation groove, 3: Part of stopper, 4: Rotor, 5: Exterior metal case, 6:
Spring mechanism, 7: Resistor element

Claims (1)

[Scope of utility model registration request] In a variable electronic component equipped with an adjustment rotor made of an electrically insulating material, one elongated straight groove with both ends open is formed passing through approximately the center of the surface of the rotor, and both ends are open at the bottom of the open groove. 1. A variable electronic component characterized in that an elongated linear dug groove is formed along the open groove.