JPH0447951Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field of the Invention] The present invention relates to a structure of a composite electronic component that is extremely effective in compounding electronic components.

[Problem that the invention attempts to solve]

2. Description of the Related Art Conventionally, in electronic devices such as radios and television receivers, electronic components have generally been mounted one by one on a printed circuit board or the like using an automatic insertion machine or the like.
Therefore, adjustment and inspection of electronic devices are performed in the final process after mounting on the printed circuit board. If an electronic device has an electronic circuit section that requires relatively much time and effort to adjust, and if that section is found to be defective during final inspection, all electronic components mounted on the printed circuit board must be discarded or replaced and then re-adjusted before inspection. This has the drawback of complicating the manufacturing process and causing the problem of increasing the manufacturing cost of the electronic device.

For example, electronic tuning circuits in the front end of AM radio receivers that do not require tracking adjustment have recently been put into practical use. Generally, in this electronic tuning circuit section, tracking adjustment is performed in the final process after electronic components such as high-frequency coils are mounted one by one on a printed circuit board, and in many cases the adjustment becomes impossible. All electronic components must be destroyed. but,
If the electrical characteristics of a composite electronic component in which the main components of the front end part are housed in advance can be adjusted before being mounted on a printed circuit board, the above-mentioned problems can be solved.

[Purpose of invention]

This invention was devised to eliminate the above-mentioned problems, and its main purpose is to combine multiple parts that make up one functional circuit, treat them as one, and inspect each unit in advance. and make adjustments.
The purpose is to make assembly and replacement convenient.

Another main object of the present invention is to provide a composite electronic component in which two or more different types of electronic components are combined in a very simple manner.

[Summary of the idea]

The composite electronic component of the present invention has an insulating resin case with a tongue-shaped partition plate to create a space for storing electronic components, and the main components of the electronic device can be divided into blocks according to function. For example, electronic components that make up a functional circuit, including a high-frequency coil, such as the electronic tuning circuit of a radio receiver, can be easily stored in an insulating resin case. In addition, it is advantageous in reducing the manufacturing cost of electronic equipment, and is extremely effective in improving productivity.

[Example of idea]

The composite electronic component according to the present invention will be explained using an electronic tuning circuit as an example, based on FIGS. 1 and 4.

1 and 2 are perspective views showing the external appearance of an embodiment of the composite electronic component according to the present invention. The embodiment in FIG. 1 has two high-frequency coils 2 and other electronic Components are stored, and FIG. 2 shows an embodiment in which three high-frequency coils and other electronic components are stored. 3 is a terminal pin of a high frequency coil, and 4 is a lead terminal of an electronic component such as a variable capacitance diode.

FIG. 3 is a diagram for explaining the state in which electronic components such as the high-frequency coil 2 and the variable capacitance diode 6 are housed, and the insulating resin case 1 has a space 8a in which the high-frequency coil 2 is housed. It is formed by a partition plate provided with a tongue piece 5, and a protrusion 5a is formed at the tip of the tongue piece 5. This protrusion 5a is designed to engage with the notch 2b of the shield case of the high frequency coil 2, so that the high frequency coil 2 is not easily separated from the cavity 8a of the resin case 1. The tongue piece 5 is made of the same resin as the case and has some elasticity, so that the high frequency coil 2 can be easily inserted into the cavity 8a. Moreover, after the high-frequency coil 2 is attached, the tongue piece 5 returns to its original state and the tongue piece 5
The protrusion 5a engages with the notch 2b of the shield case, and the high frequency coil 2 is housed in the resin case 1. In this way, several high frequency coils 2 can be easily integrated by providing the resin case 1 with a partition plate having the tongue piece 5 and providing the space 8a. Of course, the space 8a is formed to correspond to the shape of the high-frequency coil to be housed.

Further, a recess 2c is formed in the mold base 2a portion at the bottom of the high frequency coil 2 where the terminal pin 2 is implanted, and other electronic components such as a capacitor 9 are housed in the recess 2c.

On the other hand, the variable capacitance diode 6 and the like have molded portions 6a that form spaces 8a and 8 that house high-frequency coils.
It is stored in the empty space 8b provided between a. A protrusion 7 is formed on the partition plate forming the void 8b, and when the variable capacitance diode 6 or the like is press-fitted into the void 8b, the elastic protrusion 7 made of resin is pressed and deformed to some extent. Then, electronic components such as the variable capacitance diode 6 are sandwiched and fixed within the space 8b.
Alternatively, the resin case 1 and the mold part 6 may be fixed together by injecting an adhesive at the same time.

As described above, in the resin case 1 of the present invention, the high frequency coil 2 is housed in the space 8a formed by partitioning the inside of the resin case 1 by the tongue piece 5 on which the protrusion 5a is formed, and the variable capacitance diode 6, etc. By housing the resin-molded semiconductor device in the space 8b in which the protrusion 7 is formed, the conventional method of mounting each electronic component one by one using an automatic insertion machine, etc., can now be mounted in one place. It is possible to mount many parts on a printed circuit board in one step, and it is extremely easy to block electronic circuits according to function. Therefore, the electrical characteristics of the composite electronic components can be tested using composite electronic components that have been composited in advance so that each electronic circuit can be divided into blocks according to their functions, resulting in an extremely high yield of final products.

Figure 5 does not require a trimmer capacitor,
FIG. 2 is a circuit diagram of an electronic tuning circuit of an AM receiver that does not require tracking adjustment. The electronic tuning circuit of such an AM receiver has an extremely small number of parts, and the main electronic components, the high-frequency coils 20 and 21 and the variable capacitance diode 6, are housed in the spaces 8a and 8b in the resin case 1. By storing components such as capacitors 22 and 23 at the bottom of the high frequency coil 2,
The electronic tuning circuit (electronic tuner) of the AM receiver
Very easily formed. Note that 25 is a terminal connected to the high frequency amplification circuit, 26 is a terminal to which a tuning voltage applied to a variable capacitance diode, etc. of the tuning circuit is supplied, and 27 is an output terminal.

Furthermore, since the main electronic components of the electronic tuning circuit of the front end of the AM receiver are housed in a resin case using the composite electronic component of the present invention, the exterior of the electronic tuner can be easily made insulating. This makes it possible to mount electronic components other than the electronic tuning circuit closer to the electronic tuner compared to conventional electronic tuners in which the shield case is exposed, making the AM receiver more compact. It is possible to do so.

The present invention is particularly effective for parts having such functions.

It goes without saying that the composite electronic component of the present invention can be applied not only to the electronic tuning circuit of the front end of an AM receiver, but also to the functional block of other electronic circuits including high-frequency coils. do not have.

In the embodiment, it is explained that the variable capacitance diode 6 is housed in the space 8b, but it goes without saying that other resin-molded semiconductor devices or capacitors may be used.

Furthermore, since the protrusion 5a is formed on the elastic tongue piece 5, the protrusion 5a is fixed within the resin case 1 without being damaged when the high frequency coil is inserted, and its reliability is high.

Of course, the three high frequency coils shown in FIG. 2 can be easily accommodated by the shape explained in FIGS. 3 and 4 as described above.

[Effect of idea]

The composite electronic component of the present invention is extremely effective in composing each part of an electronic device, such as an electronic tuning circuit, as a circuit block according to function, and can be made smaller in size and shape by compositing. It is possible to do so.

Furthermore, since the composite electronic component of the present invention is covered with an insulating resin case, it is possible to mount other components in close proximity to the component covered with a conventional shield case. It is also effective in downsizing the device itself.

Furthermore, it is effective in reducing manufacturing costs of electronic equipment.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the appearance of an embodiment of a composite electronic component including two high-frequency coils, FIG. 2 is a perspective view showing the appearance of an embodiment of the composite electronic component including three high-frequency coils, and FIG. Figure 3 is a perspective view with a partial cutout to explain the state in which electronic components such as a high frequency coil are housed, and Figure 4 is a bottom view to explain the state in which electronic components such as a variable capacitance diode are housed. FIG. 5 is a circuit diagram of an electronic tuning circuit. 1...Resin case, 2...High frequency coil, 2b
... High frequency coil locking part, 3 ... Terminal pin, 4
... Lead terminal, 5 ... Tongue piece, 5a ... Tongue protrusion, 6 ... Variable capacitance diode, 7 ... Blank space 8b
Inner protrusions, 8a, 8b...vacancies, 9...capacitors.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a composite electronic component in which a high-frequency coil and other electronic components are housed in an insulating resin case, there is a tongue with a protrusion at the tip inside the resin case. A space is provided that is partitioned by a partition plate that is integrated with the resin case, and the high frequency coil and other electronic components are locked by the partition plate and housed in the space. Composite electronic components. (2) Utility model registration claim 1, in which the electronic components are a high frequency coil and a variable capacitance diode, which are the main electronic components of the front end section of a radio receiver.
Composite electronic components as described in section.