JPH043658B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to electronic mechanical components, and more specifically,
The present invention relates to electronic mechanical components such as trimmer capacitors, variable resistors, and rotary switches that have a rotating mechanism including a rotor and a stator.

Conventionally, in trimmer capacitors, a rotary mechanism including a rotor and a switch is housed in a case with an opening at one end, and the rotor is adjusted by a driver or the like through the opening of the case. was provided to rotate the rotor.

By the way, a relatively large torque is required to insert the blade of the driver into the driver groove and rotate the rotor. Therefore, deep grooves are required as the driver grooves, but special processing is required to form such grooves in the rotor, which has the disadvantage of increasing the cost of the trimmer capacitor.

An object of the present invention is to provide an inexpensive electronic mechanical component whose rotor is easy to process.

For this reason, the present invention provides an electronic mechanical component in which a rotating mechanism including a rotor and a stator is accommodated in a case with an open end, and the rotor is adjustable through the opening of the case, which is made of an elastic metal material. A part of the metal disk is cut downward to form at least two cut and raised pieces, and a substantially central portion of the metal disk including the base of each cut and raised piece is pushed out downward. A driver groove and a support portion that supports the base of the cut and raised piece are formed in the rotor, and the cut and raised piece engages with the rotor in an elastically deformed state on the rotor and is rotatably attached to the case. It is characterized by being equipped with a rotor presser plate that can be rotated.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

An embodiment in which the present invention is applied to a trimmer capacitor is shown in FIGS. 1 and 2.

In FIGS. 1 and 2, a case 1 housing a rotation mechanism section, which will be described later, has terminals 2 and 3 connected to the rotation mechanism section integrally formed therein.

The case 1 is made of a heat-resistant thermosetting resin that can withstand temperatures of about 300°C. One end of the terminal 2 is formed in the shape of an aperture eyelet 2a, and is electrically connected to the rotor 4 as described later. Further, the other end of the terminal 2 is extended outside the case 1.

The case 1 has an opening 5 formed therein.
A rotation mechanism section is housed inside this opening 5.

The rotation mechanism section consists of a dielectric 7, a rotor 4, and a rotor holding plate 6 in order from the bottom in FIG. It is electrically connected to one end.

A rotor 4 made of a metal material is provided on the upper surface of the dielectric 7.
A semicircular electrode conductor 4a is also formed on the lower surface of the rotor 4. Rotor 4
In the center of the terminal 2, there is a grommet 2a at one end of the terminal 2.
A through hole 4b is formed for inserting the.
Further, the upper surface of the rotor 4 is provided with an engagement recess 4c for the cut and raised pieces 6a, 6a of the rotor press plate 6, which will be described below.

The engagement recess 4c is for achieving engagement with the cut and raised pieces 6a, 6a of the rotor holding plate 6, and is provided on both sides of each cut and raised piece 6a on the rotating surface of the rotor holding plate 6. It is provided with engagement surfaces that stand up at almost right angles to the surface and that each of the above-mentioned cut and raised pieces 6a is abutted on both sides thereof.

The rotor holding plate 6 is formed by molding a metal disk (not shown) made of an elastic metal material such as phosphor bronze into the shape shown in FIGS. 3 and 4. That is, a part of the member between the center portion and the peripheral edge of the metal disk is cut and raised downward, and the cut and raised piece 6a is inclined diagonally downward with respect to one surface of the metal disk. , 6a, . . . are formed. Then, the vicinity of the center of the metal disk including the base of each cut and raised piece 6a is pushed out from the one surface toward the other surface, and the cut and raised pieces 6a, 6a, . . . A supporting portion 6d is formed.

The rotor holding plate 6 has a hole 6b in the center thereof through which the eyelet 2a at one end of the terminal 2 is inserted.

In addition, the cut and raised pieces 6a,
After cutting and raising 6a, . . ., slits 6c, 6c are formed into which the blade of a driver (not shown) is inserted.

As shown in FIG. 1, the rotor press plate 6 is
It is arranged on the rotor 4. And this rotor 4
The cut and raised pieces 6a, 6a, . . . of the rotor presser plate 6 are fitted into the engagement recesses 4c. The eyelet 2a at one end of the terminal 2 is inserted into the through hole 4b of the rotor 4 and the hole 6b of the rotor holding plate 6, and by caulking the eyelet 2a, the rotor holding plate 6 is connected to the rotor 4. It is attached to the case 1 so as to be co-rotatable.

The capacitance of the trimmer capacitor having the above configuration is extracted from between terminals 2 and 3. The magnitude of this capacitance is determined by the overlapping area of the electrode conductor 4a formed on the lower surface of the rotor 4 and the electrode conductor 7a formed on the lower surface of the dielectric 7. This overlapping area can be changed since the rotor 4 also rotates when the blade of a driver is inserted into the slot 6c of the rotor press plate 6 and the rotor press plate 6 is rotated.

At this time, the cut and raised pieces 6a, 6 of the rotor press plate 6
Since the tip ends of the rotor 4 press the bottom of the engagement recess 4c of the rotor 4, the rotor 4 is urged toward the dielectric 7, and the cut and raised pieces 6a, 6a, . It does not come off from the engagement recess 4c.

Therefore, the depth of the engagement recess 4c of the rotor 4 may be small, and can be easily formed by coining or the like, which is inexpensive.

In the above embodiment, instead of attaching the rotor retaining plate 6 to the eyelet 2a of the terminal 2 by caulking, a locking plate is provided in the opening 5 of the case 1, although not specifically shown in the drawings. The rotor press plate 6 may be locked by a stop plate.

In addition to the trimmer capacitor, the present invention can also be applied to electronic mechanical parts such as variable resistors and rotary switches in which a rotating mechanism is housed in a case.

According to the present invention, the cut and raised pieces of the rotor presser plate of the electronic mechanical component in which the rotating mechanism part is housed in the case follow the fluctuations of the rotating surface of the rotor by its spring force, so that the cut and raised piece of the rotor presser plate The engagement between the rotor and the rotor does not come off, and the rotor's engagement portion can be easily machined, making it possible to use an inexpensive rotor with low processing costs, and to create an electronic mechanism with low component costs. parts can be obtained.

Further, according to the present invention, the impact or force applied from the opening side of the case of the electronic mechanism component is absorbed by the rotor pressing plate, and the rotating mechanism section of the electronic mechanism component is protected from the impact force or force.

[Brief explanation of drawings]

Fig. 1 is a plan view of a trimmer capacitor to which the present invention is applied, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig.
The figure is a plan view of the rotor pressing plate, and FIG. 4 is a sectional view taken along the line -- in FIG. 3. 1...Case, 2, 3...Terminal, 4...Rotor, 4c
...Engagement recess, 5...Opening, 6...Rotor pressing plate,
6a... cut and raised piece, 6c... slot, 6d... support section, 7... dielectric material.

Claims (1)

[Scope of Claims] 1. An electronic mechanism component comprising a rotating mechanism including a rotor and a stator housed in a case with an opening at one end, and the rotor being adjustable through the opening of the case, the electronic mechanism being made of an elastic metal material. A part of the metal disk is cut downward to form at least two cut and raised pieces, and a substantially central portion of the metal disk including the base of each cut and raised piece is pushed out downward. A driver groove and a support portion that supports the base of the cut and raised piece are formed in the rotor, and the cut and raised piece engages with the rotor in an elastically deformed state on the rotor and is rotatably attached to the case. An electronic mechanism component characterized by being equipped with a rotor holding plate.