JPH036038Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Technical field of invention] The present invention relates to a slim radio receiver.

[Explanation and problems of conventional technology]

In recent years, development of thin electronic devices has been active, and in particular, radio receivers with a thickness of millimeters have been developed. For example, the applicant of the present invention previously filed a utility model registration application dated October 1, 1985 for ``FM dedicated radio receiver,'' and a utility model registration application filed on the same day for ``Small radio receiver'' indicates that the slim radio You can see the specific structure of the receiver. In such thin radio receivers with a thickness of about 1 mm to 4 mm, it is not possible to use electromagnetic cone speakers with a thickness of 5 mm to 10 mm, which are conventionally used in radio receivers, so earphones or headphones cannot be used. I was listening to a radio broadcast. However, some users
Some users do not like to use earphones or headphones, and even with the above-mentioned thin radio receiver, if radio broadcasts could be listened to through speakers in addition to earphones or headphones, the marketability would improve as well. , it is possible to provide a thin radio receiver that is excellent in terms of performance and price, but such a thin radio receiver has not existed before.

[Purpose of invention]

This idea is designed to receive thin radio receivers with a thickness of about 1 mm to 4 mm by stacking film-like speakers on the back side of the front panel of the thin radio receiver with a small gap that absorbs the vibration amplitude. Whether it's a machine, earphones or headphones,
The purpose of the present invention is to provide a thin radio receiver that allows listening to radio broadcasts through a speaker, is highly marketable, and is far superior to conventional ones in terms of performance and price.

[Key points of the idea]

The main point of this idea is that in a thin radio receiver,
The film-like speakers are arranged and laminated on the back side of the front panel with a small gap that absorbs the amplitude of the vibrations.

[Example of idea]

One embodiment of the present invention will be described based on FIGS. 1 to 3.

FIG. 1a is a front view of a thin radio receiver according to the present invention, in this case shaped like a penguin. FIG. 1b is a right side view of the slim radio receiver of FIG. 1a, and FIG. 1c is a rear view thereof.

In FIG. 1a, reference numeral 1 denotes a radio receiver main body, and a tuning knob 2 and a volume knob 3 are provided on the surface of the radio receiver so as to constitute the penguin's eyes. By turning the tuning knob 2 to the right or left, a radio broadcast program is selected, and by turning the volume knob to the right or left, the volume of the sound is determined. Moreover, the tuning knob 2 and the volume knob 3 are
As shown in Figure b, it is provided to protrude slightly from the surface for easy operation. Furthermore, a sound emitting hole 4 is provided in the penguin's belly portion of the radio receiver 1 to emit radio broadcast sound from a film-like speaker, which will be described later.
is formed.

FIG. 2 is a sectional view taken along the line AA in FIG. 1a. It is expanded and shown to clarify the structure. In this FIG. 2, 5 is a front panel, and this front panel 5
is formed of a synthetic resin plate or a metal plate, has the above-mentioned sound emitting hole 4 opened therein, and has a speaker mounting convex portion 6 formed on its inner back surface. Reference numeral 7 denotes a circular piezoelectric polymer film-like speaker, which is made of polyvinylidene fluoride (abbreviated as PVF ₂ ), for example. This PVF ₂ is soft and can be formed into a film, and has very low mechanical impedance, so the film itself can be used as a speaker diaphragm, and the thickness can be less than 0.1 mm. Reference numeral 8 denotes a chassis made of synthetic resin, and a wiring board 10 on which an LSI 9 and the like forming a receiving circuit are arranged is attached to the back side of the chassis, and electronic components such as a tuning variable capacitor 11 and a bar antenna 12 are also built in. ing. Reference numeral 13 denotes a back panel, which is made of the same material as the above-mentioned front panel 5. FIG. 3 is a sectional view taken along the line BB in FIG. 1a, and the configuration is the same as that in FIG. 2, so a description thereof will be omitted.

The radio receiver main body 1 includes the above-mentioned front panel 5,
It has a structure in which the chassis part 8 and the back panel 13 are laminated and pasted together with an adhesive or the like, and has a thickness of about 1 mm to 4 mm, as shown in FIG. 1b.

Next, the installation and operation of the circular piezoelectric polymer film speaker 7 described above will be explained. A piezoelectric polymer type (for example, made of PVF ₂ ) film-shaped speaker itself corresponds to a diaphragm, and when a voltage change is applied to its upper and lower surfaces, it vibrates upward and downward, producing sound bursts. Therefore, a speaker mounting convex part 6 is formed on the back side of the front panel 5 by surrounding it with the period of the sound emitting hole 4 so as to have a minute gap that absorbs the amplitude caused by vibration, and a film-like speaker 7 is mounted on the upper end surface of the speaker mounting convex part 6. Glue the periphery. In this case, the speaker mounting convex portion 6 is formed with a small gap that absorbs the amplitude so as not to affect the downward vibration of the film-like speaker 7 even with respect to the electronic components of the chassis portion 8. The film-like speaker 7 vibrates upward and downward between the minute gaps above and below.

With the above configuration, the thickness can be reduced to 1 mm.
Even thin radios of about 4mm to 4mm can have built-in speakers.

In the above embodiment, the speaker mounting convex portion 6 is formed on the front panel 5 side and the film-like speaker 7 is attached to the upper end thereof, but the mounting portion may be formed as a recess in the chassis portion 8.

[Effect of idea]

The thin radio receiver according to the present invention has a thin radio receiver with a thickness of about 1 mm to 4 mm, by stacking film-like speakers on the back side of the front panel with a minute gap that absorbs the amplitude caused by the vibration. Even if it is a receiver, you can listen to radio broadcasts not only through earphones and headphones, but also through speakers.We offer a thin radio receiver that is highly marketable and far superior to conventional products in terms of performance and price. can.

[Brief explanation of the drawing]

Fig. 1a is a front view of a thin radio receiver according to an embodiment of the present invention, b is a right side view thereof, c is a rear view thereof, and Fig. 2 is a sectional view taken along line AA in Fig. 1a. , FIG. 3 is a sectional view taken along line BB in FIG. 1a. 1...Thin radio receiver body, 4...Sound emission hole,
5... Surface panel, 7... Film speaker,
8... Chassis section, 13... Back panel.

Claims (1)

[Claims for Utility Model Registration] (1) A front panel having a sound emitting hole, a film-shaped speaker arranged on the back side of the front panel with a minute gap that absorbs the amplitude of vibration, and the film. A thin radio receiver having a laminated structure including a chassis part disposed on the back side of a shaped speaker and incorporating electronic components such as a receiving circuit, and a back panel disposed on the back side of the chassis part. (2) The thin radio receiver according to claim 1, wherein the film speaker is a piezoelectric polymer film speaker.