JPS5972102A - 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 used in, for example, a variable resistor or a band switching switch, and more specifically, the present invention relates to an electrical component used in a variable resistor, a band switching switch, etc. This relates to electrical components that are incorporated into a holder such as a holder.

Recently, the demand for miniaturization of electrical components has permeated all fields, and tuning tuners incorporated in television sets and the like are no exception. However, this type of tuner requires multiple band switching switches and tuning variable resistors in one frame.

If each part is miniaturized, it becomes complicated and inconvenient during assembly and manufacturing, and parts management also has 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 rotating body 2 that is built into the holder 1 in a non-removable and rotatable manner. , a holding body 1 with a shaft hole 1a drilled in advance is sandwiched between first and second molding molds 3 and 4 and brought into close contact with each other, and a thermoplastic synthetic resin material is injected into these molding molds 3 and 4. At the same time, the rotating body 2 is formed by filling it with water and cooling and hardening it.
It was incorporated into the holder 1. Here, the rotating body 2 contracts during cooling and hardening to create a gap between it and the holder 1, and becomes rotatable with respect to the holder 1 and corresponds to the shaft hole 1a inclined in a predetermined direction. Shaft part 2 tilted by
It was incorporated in a non-removable manner by a. This results in
The holder 1 and the rotating body 2 are each formed separately, and the labor of assembling the plurality of rotating bodies 2 one by one into the holder 1 is reduced, thereby simplifying assembly and manufacturing.

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 2b with a knob (
When fitting the sliders (not shown) to the drive unit 2C, the knobs or sliders are set in predetermined positions corresponding to the rotational positions of the individual rotating bodies 2. This was extremely troublesome and difficult to automate.

Therefore, an object of the present invention is to provide a connecting body that is disconnected when a rotating body is forcibly rotated, and which connects each rotating body to at least one of the adjacent rotating bodies. It is an object of the present invention to provide an electrical component that can temporarily fix a rotating body in a positioned state when assembling a switch or the like, making it easy to attach a slider bone, etc., and that 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 10. This holder 10 is molded from a thermoplastic synthetic resin such as polyethylene terephthalate, and has a stepped shaft Oa into which the rotating body 11 is incorporated, and a sloped portion 10b at a reduced diameter portion of the shaft hole 10a. It is formed. on the other hand,
The rotating body 11 has a fitting part 11a into which a knob (not shown) is fitted.
a driving part lid having a diameter larger than that of the shaft hole 10a, and a driving part lid having a diameter larger than that of the shaft hole 10a, and a driving part lid having a diameter larger than that of the shaft hole 10a;
and a shaft portion lie which connects the shaft portions and engages with the shaft hole 1()a.

This shaft portion lie is inclined in correspondence with the inclined portion 10b of the shaft hole 108, and a slight gap is formed between the shaft portion lie and the inclined portion tab. The rotating body 11 is prevented from falling off due to the engagement between the shaft portion lie and the inclined portion 10 of the shaft hole 10a. Then, a pair of adjacent rotating bodies 11 are connected by connecting bodies 12 that are easily disconnected by the forced rotation of the rotating bodies 11, and a plurality of such pairs are arranged in a row. This connecting body 12 has a connecting part 12a that connects a pair of rotating bodies 11 via a cutting part 12C, and even if this connecting part 12a is disconnected from the rotating body 11, the connecting part 12
It is formed from a holding part 12b that prevents the part a from falling off.

The connecting portion 12a is formed with a thin and narrow cut portion 12C so as to be easily connected to both ends connected to the drive portion lid of the rotating body 11.
A holding hole 10C inclined in the same direction as the inclined portion 10b of a.
It is loosely fitted. The connecting body 12 and the rotating body 11 are integrally molded from a thermoplastic synthetic resin such as polyacetal.

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 10 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 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 10 made of a thermoplastic synthetic resin (polyethylene terephthalate) 43 and having a plurality of shaft holes 10a and a holding hole 10C is placed between first and second molds 1.
4.Pinch and press together at 15. This first mold 14
is the cavity 1 forming the operating part 11b of the rotating body 11.
4a is formed, and the second mold 15 is the rotating body 1.
Capites 415a and 15b that form the drive unit lid of 1 and the connection part 12a of the connection body 12 are formed. Then, a thermoplastic synthetic resin material such as polyacetal is injected into the cavities 14a, 15a, 15 of the image forming molds 14, 15 through a gate (not shown) of the second molding mold 15.
b and the shaft holes 10a and 1 of the holding holes 10C of the holding body 10, 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 molded from 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 same type of molding material is used, for example, if the surface of the holder 10 is made smooth, the resin of the rotating body 11 and the connecting body 12 will not dig into the boundary surface. Furthermore, during the cooling and hardening process, the thermoplastic synthetic resin contracts and gaps are created between the shaft part lie of the rotating body 11 and the holding body lO and between the holding part 12b of the connecting body 12 and the holding body lO. The body 11 and the connecting body 12 are rotatably supported by the holding body 10. and,
Two adjacent rotating bodies 11 are positioned at a predetermined position by a connecting body 12 and are integrally molded, and these two rotating bodies 1
The electrical component according to the present invention is formed by molding the side pairs of the connector 1 and the connecting body 12 at the same time. Note that the rotating body 31 for the 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.
These rotating bodies 11 and 3 are arranged in parallel with 1.
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. Further, a worm gear 17 for rotating a rotary body 31 for a variable resistor is protruded from a rectangular long hole 16C of the insulating case 16, and the worm gear 17, the rotary body 11 for band switching, and the rotary body 31 for an 0f resistor are protruded. A plurality of sets are arranged in parallel in the longitudinal direction. Furthermore, an insulating substrate 18 having terminals 21 and 22 held by a terminal holding portion 19 on its lower surface is attached to the lower side of the holding body 10 in the drawing. On the upper surface of this insulating substrate 18, a contact circuit (not shown) for band switching corresponding to the rotating bodies 11, 3] and a resistance circuit 23 (not shown) of a variable resistor are provided.
(see FIG. 9) is printed. This resistance circuit 23
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.
This slider bone 26 and the slider 25 are rotatably caulked to the insulating substrate 18 through eyelets 27. Then, the engaging protrusion 26a of the slider bone 26 is fitted into the concave fitting part 31f of the driving part 31d of the rotating body 31, and the driving part Li of one of the rotating bodies 11
A slider bone associated with a contact circuit for band switching is also fitted into the fitting portion 11C of d. Furthermore, a knob (not shown) 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. After that, by rotating the worm gear 17, the rotating body 31 is forced to rotate in the same direction, and by rotating the knob, the rotating body 11 is forcibly rotated in the same direction.
The connecting body 12 is rotated in the opposite direction to the rotating bodies 11 and 31, and the cutting portion 12C is easily cut (FIG. 4(b)).

Therefore, both the rotating bodies 11 and 31 are made rotatable, and the connecting body 12 is rotatably held by the holder 10, so that the tuning block is completely 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 at the time it is assembled and formed, and a plurality of rotary bodies 2 are rotated to different positions. However, according to the present invention, the connecting body 12, if the slider bone 26 and the screw etc. are set at predetermined positions, the rotating bodies 11° 31 and -p (of number a) will be fitted, etc.
Of course, it will be automated. Moreover, the connecting body j2 cut by the forced rotation is attached to the holding part 1 loosely fitted into the holding hole 10C.
Since the connecting portion 12a is supported by 2b, the connecting portion 12a will not be scattered, and of course, will not have any adverse effects. Furthermore, since the connecting body 12 is rotatable, even if the rotary body IJ, 31 is rotated by the force generated when the cutting portion 12C is cut, the connecting body 12
Even if the rotating bodies 11 and 31 come into contact with the connecting body 12, the rotating bodies 11 and 31 can rotate with almost no resistance from the connecting body 12.

When using the holding body IO in an upright position, the center of gravity of the connecting body J2 is moved to a position 45 away from the rotation center axis of the connecting body 12, and the connecting body I2 is moved by the vehicle force as shown in FIG. 4(b). In other words, the connecting portion 12a is placed in the position shown in FIG.
If the rotating bodies 11 and 31 are made to stand still at a position separated from the connecting bodies 1 and 31, the rotating bodies 11 and 31 will not even come into contact with the connecting body 12, so that the connecting bodies 12 will not receive any resistance when rotating.

By rotating the worm gear 17 of the tuning block assembled in this way, the rotating body 31 is rotated,
When the rotating body 31 rotates the slider bone 26, the contact piece 25a slides on the resistance circuit 23, and the resistance value is adjusted. 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 ii, 31 connected by the connecting body 12 is not limited to two as in the above embodiment, but may be three, etc. However, its application range is extremely wide.

As explained above, according to the present invention, by connecting at least two rotating bodies with a connecting body, it is possible to position a plurality of rotating bodies, for example, to attach a slider bone, etc. The advantage is that the assembly of products, such as tuning blocks, can be easily performed at one time automatically.

[Brief explanation of the drawing]

Figures 1 and 2 show examples proposed before this invention, in which 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. ~ Figure 6 shows an embodiment of the present invention, Figure 3 is a sectional view of an electrical component used in a band switching switch, and Figure 4 is a bottom view of the same electrical component. (a) is a diagram of the state before the cut section is cut, FIG. 4 (b) is a diagram of the state after the cut section is cut, and FIG. 5 is a cross section of an electrical component used in a variable resistor. Figure 6 is a sectional view showing a method of molding the electrical component shown in Figure 3, and Figures 7 to 9 show a tuning block using the electrical component according to the present invention. FIG. 8 is a side view of the tuning block shown in FIG. 7, and FIG. 9 is a partial plan view of the variable resistor mounted on the insulating substrate of the tuning block. 10 Holding body, 10d to 1o ・Shaft hole, toc...
・Holding hole, 11, 31...Rotating body, 11b, 31b
・Operation unit, 11d, 31d...Drive unit, 11ef31
e...Shaft portion, 12 Connection body, 12a/Connection portion, 12
b... Holding part, 12c... Cutting part. Applicant Alps Electric Co., Ltd. No. 11'4 2C 2 [J Figure 3 Figure 4 (a) 1 Figure 4 (b) Figure 5 Figure 6 Procedural Amendment Letter issued) July 3, 1982 Commissioner of the Japan Patent Office 1. Indication of the case Patent Application No. 181443 of 1981 2. Name of the invention Electrical component 3. Relationship with 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 669-4421 Address 1 Nihonbashi Kakigara-cho, Chuo-ku, Tokyo
-13-125, "Detailed explanation of the invention" in the specification to be amended, Drawing 6, Contents of the amendment (1) From line 4 to line 5 on page 6 of the central cylinder of the specification, there is a ``number for easy connection''. ;" is replaced with "so that it is easy to be cut off."
and correct it. (2) On page 8, line 20 of the same page, replace “rotatably” with “
"It's loosely fitted," he corrected. (3) In FIG. 3, "lO" is corrected to rlOaJ as indicated in red ink in the attached drawing. that's all

Claims (3)

[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 integrally formed 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 is connected to the above-mentioned body through a cutting portion that is easily cut when the rotating body is forcedly rotated. A connecting part that connects the rotating bodies, and a holding part that is loosely fitted into a holding hole provided in the holding body and does not allow the connecting part to fall off even if the cutting part is cut, and the cutting part is cut. 09, wherein the rotating body and the connecting body are rotatable with respect to the holding body when the rotating body and the connecting body are rotated. (2) The electrical component according to claim 1, wherein the connecting body is configured to stand still at a position where the connecting portion is separated from the rotating body when the cutting portion is cut. (3) The electrical component according to claim 2, wherein the connecting body has a center of gravity at a position spaced apart from its rotation center axis.