JPS5936905A - Electric part - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrical component M used for, for example, a variable resistor or a band switching switch, and more specifically, a rotating body rotated by an operator rotatably supports the electrical component M. It relates to electrical components that are built into a holder such as a cover.

In recent years, the demand for miniaturization of electrical components has permeated all fields, and tuning tuners and the like, which are often installed in television sets, are no exception. However, this type of tuner requires multiple band switching switches and tuning variable resistors to be attached to a single frame, so miniaturizing each component causes the inconvenience of complicating assembly and manufacturing. As expected, parts management had to be extremely strict.

For this reason, as this type of electrical component, one that can be easily assembled and manufactured as shown in FIGS. 1 and 2, for example, has been proposed. That is, this electrical component consists of a holder 1 having a shaft hole 1a and a rotary body 2 that is built into the holder 1 in a non-removable and rotatable manner, and its molding method is as shown in FIG. A holding body 1 having a shaft hole 1a previously drilled therein is sandwiched between $1 and second molding molds 3 and 4 and brought into close contact with each other, and a thermoplastic synthetic resin material is injected into the molding molds 3 and 4. The rotary body 2 was formed by filling the rotor with water, cooling and hardening it, and at the same time, it was incorporated into the holder 1. Here, the rotating body 2 contracts during cooling and hardening, creating a gap between it and the holding body 1, and becomes rotatable with respect to the holding body 1, and corresponds to the shaft hole 1a inclined in a predetermined direction. The shaft portion 2a is tilted by
It was incorporated in a way that could not be removed. This simplifies assembly and manufacturing by reducing the need to form the holding body 1 and the rotating body 2 separately and then assembling several rotating bodies 2 into the holding body 1 one by one.

However, even with this improved electrical component, the multiple rotating bodies 2 are structured to rotate in various directions after manufacture, so when used for a band switching switch, for example, the operation part of the rotating body 2 is When fitting a knob (not shown) to the 2bi and a slider bone (not shown) to the drive unit 2C, the support or slider bone should be made to correspond to the rotational position of each rotating body 2. It is very troublesome to have to adjust each to the specified position.
This was difficult to automate.

Therefore, an object of the invention is to provide a connecting body that is disconnected when a rotating body is forcibly rotated, and by connecting each rotating body to at least one of the adjacent rotating bodies, a band switching switch is provided. It is an object of the present invention to provide an electrical component which can temporarily fix a rotary body in a positioned state during assembly, thereby making it easy to attach a slider bone, etc., and which can also be automated.

The present invention will be explained below based on the drawings.

3 to 6 are diagrams showing embodiments of the present invention.

First, the structure will be described. Reference numeral 10 in the figure is a holding body such as a stator portion or a frame body, and a plurality of rotary bodies 11, for example, band switching switches, are incorporated into this holding body 1°. This holder 1o is molded from a thermoplastic synthetic resin such as polyethylene terephthalate, and has a stepped shaft hole 10a into which the rotating body 11 is incorporated, and a sloped portion 10b is formed at the reduced diameter portion of the shaft hole 10a. It is formed. On the other hand, the rotating body 11 has a fitting part 11 into which a knob (not shown) is fitted.
an operating portion 11 b having a diameter of
and a shaft portion 11e that connects the shaft portions b and engages with the shaft hole 10a.

This shaft portion 11e is inclined in correspondence with the inclined portion 10b of the shaft hole 10a, and a slight gap is formed between the shaft portion 11e and the inclined portion 10b. The rotating body 11 is prevented from falling off due to the engagement between the shaft portion lie and the inclined portion 10b of the shaft hole 10a. The pair of rotating bodies 11 that are in contact with li4 are easily disconnected by the forced rotation of the rotating bodies 11.
2, and a plurality of such sets are assembled. This connecting body 12 has a connecting part 12a that connects the pair of rotating bodies 11 via a cutting part 12C, and a connecting part 12a that connects the pair of rotating bodies 11 via a cutting part 12C, and a connecting part 12a that connects the pair of rotating bodies 11 through a cutting part 12C.
It is formed from a holding part 12b that prevents the part a from falling off.

The connecting portion 12a has thin and narrow cutting portions 12c formed at both ends connected to the drive portion lid of the rotating body 11 so as to be easily cut.
Holding hole' 10 inclined in the same direction as the inclined part 10b of a
It is buried in c.

The connecting body 12 and the rotating body 11 are integrally molded from a thermoplastic synthetic resin such as polyacetal.

Further, in the electrical component shown in FIG. 5, the rotating body 31 is for example a variable resistor, and the conical shaft hole 10d of the holder 1o is
Two adjacent rotating bodies 31 are connected by a connecting body 12 similar to that described above. This rotary body 31 has a pointer 31a formed on the upper surface of the operating part 31b, a toothed part 31c formed on the peripheral surface, and a shaft part 31e interposed between the operating part 31b and the driving part 31d and a shaft hole 10d. It is correspondingly conically shaped.

Next, a method for molding an electrical component according to the present invention will be explained with reference to FIG.

First, a holder 1o made of a thermoplastic synthetic resin such as polyethylene terephthalate and having a plurality of shaft holes 10a and holding holes 10c is placed in the first and second molds 14.
, 15 to pinch and stick together. This first molding die 14 has a cavity 14 that forms the operating portion 11b of the rotating body 11.
a is formed, and the second mold 15 is the rotating body 11
Cavities 15a and 15b are formed to form the drive portion lid of the drive portion and the connection portion 12a of the connection body 12. Then, a thermoplastic synthetic resin material such as polyacetal is injected through a gate (not shown) of the second mold 15, and the capites 414a, 15a, 15 of the image molds 14, 15 are
b and the shaft hole 10a1 of the holder 10 and the holding hole 10c, and are cooled and hardened. In this case, it should be noted in particular that the holder 10 is molded and hardened prior to molding the rotating body 11, and that the materials 10 and 11 are made of different synthetic resin materials, such as 10
The melting point of the material from which the rotating body 11 is molded is relatively higher than the melting point of the material from which the rotating body 11 is molded. Therefore, the rotating body 1
Even during molding of No. 1, no integration phenomenon due to welding occurs at the interface between these two molding materials. Even if the molding material is the same, for example, if the bottom surface of the holder 10 is made smooth, the resin of the rotating body 11 can be prevented from being bitten into the boundary surface, and the rotating body 1 can be rotated. It is supported by the holder 10 in this manner. Due to the cooling and hardening, the thermoplastic synthetic resin contracts, the shaft portion 11e of the rotating body II and the holding body 10 are slightly separated, and the two adjacent rotating bodies 11 are positioned at a predetermined position by the connecting body 12 and integrated. molded,
The combination of the two rotary bodies 11 and the connecting body 12 is molded at the same time as the side pair to form an electrical component according to the present invention. Note that the rotating body 31 for the DI variable resistor is also formed in the same manner as described above.

An example in which the electrical component formed in this manner is implemented in a tuning block will be described with reference to FIGS. 7 to 9. FIG. 7 is a plan view of this tuning block, and as shown in this figure, a rotating body 11 for band switching and a rotating body 3 for variable resistor.
1 are arranged in series, and these rotating bodies 11, 3
The operation parts 11b and 31b of 1 are the circular holes 16 of the insulating case 16.
They are rotatably protruded from a and 16b, and are positioned and incorporated into a holding body 10 fitted to the lower side of the insulating case 16 by connecting bodies 12, respectively. The worm gear I7 that rotates the variable resistor rotating body 31 is still projected from the rectangular long hole 16c of the insulating case 16, and the worm gear I7, the band switching rotating body 11, and the variable resistor rotating body 31 are connected to each other. A plurality of sets are arranged in parallel in the longitudinal direction. Further, in the drawing, the holding body 10 has a lower side Kfd, and an insulating substrate 18 having terminals 21 and 22 held on the lower surface thereof by a terminal holding portion I9 is attached. On the upper surface of this insulating substrate 18, contact circuits (not shown) for band switching corresponding to the rotating bodies 11 and 31 and a resistance circuit 23 of a variable resistor are provided.
(See FIG. 9) is printed. This resistance circuit 2
3 are connected to the terminals 21 and 22, and a plurality of resistance circuits 23 are connected to each other by leads 24.

A slider 25 having a contact piece 25a that comes into sliding contact with this resistance circuit 23 has a pair of engagement protrusions 26a and a holding portion 26b.
The slider bone 26 and the slider 25 are rotatably caulked to the insulating substrate 18 through the eyelet 27 (37), and the slider bone 2
The engaging protrusion 26a of the rotating body 31 is fitted into the concave fitting part 31f of the driving part 31d of the rotating body 31, and the fitting part 11c of the driving part 11 of the rotating body 11 is also provided with a contact circuit for band switching. A slider bone related to this is fitted.Furthermore, a knob outside the area is attached to the fitting part 11a of the operating part 11b of the rotating body 11 for band switching, and the tuning block is temporarily assembled. The rotating body 31 is forcibly rotated by rotating the worm gear F, and the rotating body 11 is forcibly rotated by rotating the knob, and the connecting body 12 is cut from the cutting portion 12c. It is rotatable and the tuning block is fully assembled.

Here, since both the rotating bodies 11 and 31 are positioned at a predetermined position and temporarily fixed by the connecting body 12 when fitting with the slider bone 26 and when attaching the knob, the rotating bodies 11 and 31 are There is no possibility that each rotation position will be different. Conventionally, the rotary body 2 is rotatable when it is assembled and formed, and a plurality of rotary bodies 2 are rotated to different positions. However, according to the present invention, if the sliding element 26 and the knobs are set at predetermined positions using the connecting body 12, they can be fitted to a plurality of rotary bodies 11°31 at the same time. Of course, automation is also possible. In addition, in the connection body 12 that has been cut by forced rotation, the connection part 12a is supported by the holding part 12b embedded in the holding body 10, so that the connection part 12a is supported by the holding part 12b embedded in the holding body 10.
Of course, 2a is not scattered and has no negative effect.

By rotating the worm gear 17 of the tuning block assembled in this way, the rotating body 31 is rotated,
The sliding element 26 is rotated by the rotating body 31, and the contact piece 25a slides on the resistance circuit 23, thereby adjusting the resistance value. In addition, when the knob is rotated, the rotating body 11
is rotated to perform band switching.

Note that the electrical component according to the present invention is not limited to the tuning block of the above embodiment, and can of course be used for a variable resistor or a band switching switch alone, and the holder can be used as an insulating cover. Needless to say, the number of rotating bodies 11 and 31 connected by the connecting body 12 is not limited to two as in the above embodiment, but may be three, etc. The scope of its application is extremely wide.

As explained above, according to the present invention, by connecting at least two rotating bodies with a connecting body, a plurality of rotating bodies can be brought into a positioning state, and for example, a slider bone etc. can be attached once. This can be carried out automatically, resulting in the effect that, for example, it is possible to easily assemble products such as tuning blocks.

[Brief explanation of drawings]

Figures 1 and 2 show examples proposed before Jin's invention. Figure 1 is a cross-sectional view of an electrical component, Figure 2 is a cross-sectional view showing a method of molding the electrical component, and Figure 3 is a cross-sectional view of the electrical component. Figures 6 to 6 show embodiments of the present invention. Figure 3 is a sectional view of an electrical component used in a band switching switch, Figure 4 is a bottom view of the same electrical component, and Figure 5 is a variable A sectional view of an electrical component used in a resistor, FIG. 6 is a sectional view showing a method of forming the electrical component shown in FIG. 3, and FIGS. 7 to 9 are a tuning block using the electrical component according to the present invention. Fig. 7 is a plan view of the tuning block, and Fig. 8 is a plan view of the tuning block shown in Fig. 7.
Figure 1, fi49, is a partial plan view of the variable resistor mounted on the insulating substrate of the tuning block. 10...Holding body, 10a, 10d-shaft hole, 11,
31 One rotating body, 11b, 31b, , operation unit, li
d, 31d...driving section, lle, 31e...shaft section, 12...connecting body, 12a...connecting section, 12b holding section, 12C...cutting section. Applicant Alps Electric Co., Ltd. Figure 1 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 7 Figure 9 Procedural Amendment (White Side July 1988) 30 Commissioner of the Patent Office, Mr. Indication of the case 1982 Patent Application No. 146185 2. Title of invention: Electrical parts; 3. Relationship with the case of the person making the amendment Patent applicant address 1-7 Yukitani Otsuka-cho, Ota-ku, Tokyo Name (A
O9) Alps Electric Co., Ltd. 4, Agent 103 Telephone 669-21 Address Nihonbashi Kakigara-cho, Chuo-ku, Tokyo] -
13-125 Amendment Engraving Drawing 6 Contents of Amendment In Figure 3, "10" is corrected to rlnaJ as indicated in red ink on the attached drawing.

Claims (2)

[Claims] (1) A plurality of rotating bodies, each consisting of a shaft portion that engages with the shaft hole, and an operating portion and a drive portion that are integrally molded with the shaft portion, are non-removably incorporated into a holding body having a shaft hole; and each of the rotating bodies is integrally connected to at least one of the adjacent rotating bodies by a connecting body, and the connecting body has a cutting part that is easily cut when the rotating body is forcibly rotated; An electrical component characterized in that the rotating body is rotatable relative to the holding body when the cutting portion is cut. (2) The connecting body consists of a connecting part that connects the rotating bodies via a cutting part, and a holding part that is embedded in the holding body and does not allow the connecting part to fall off even if the connecting part is cut from the rotating body. An electrical component according to claim 1, characterized in that: