JPS6041396A - Acoustic device - Google Patents

Abstract

PURPOSE:To reproduce stereo sounds without hindering the user from carrying an acoustic device, by storing a thin plane speaker in the acoustic device body or attaching this speaker there. CONSTITUTION:Two thin plane speaskers 13 and 14 are fitted into groove-shaped holding parts 15 and 16, which are formed in both ends in the lengthwise direction, namely, the vertical direction of the back of a microcassette tape recorder body 11, and are held. Speakers 13 and 14 are not fixed but can be pulled out; and they can be installed apart from the device body 11, and in this casse, the device body 11 and speakers 13 and 14 are connected electrically to each other by expansible cords 17 and 18 to reproduce stereo sounds. Normally, speakers 13 and 14 are used in the state where the user carries the tape recorder handily, and in this case, sounds are produced from the speaker 13 placed on the outside.

Description

[Detailed description of the invention] The present invention relates to an audio device.

Recently, there has been a remarkable trend toward smaller and thinner audio equipment such as radio receivers and cassette tape recorders.

Conventional small and thin radio receivers and cassettes) 7
-7o Audio devices such as recorders include those with a built-in speaker and those that do not have an internal speaker and are connected to an external speaker including earphones or headphones to produce sound.

The micro cassette tape recorder shown in Figure 1, -(
1) and the thin radio receiver (2) shown in FIG. 2 both have built-in speakers (3) and (4). Such small-sized audio devices usually have only one built-in speaker and are not capable of stereo reproduction. Devices that have multiple built-in speakers and are capable of stereo playback tend to be large. Even if it has two ultra-compact speakers built-in,
It is not suitable for stereo reproduction because the distance between the speakers is narrow. In addition, it goes without saying that devices that connect external speakers require you to carry an external speaker with you, and not only box-type speakers but also earphones and headphones cannot be integrated with the main unit, which is very inconvenient. . ' The present invention has been made in order to deal with the above-mentioned conventional problems, and is a compact 'F4 type radio receiver, micro cassette tape recorder, etc. This allows multiple speakers to be stacked one on top of the other, making stereo playback possible even with a small and thin sound device.

The present invention will be explained below based on drawings (FIGS. 3 to 11) showing embodiments. First, a first embodiment shown in FIGS. 3 to 7 will be described. This first embodiment is an embodiment of a micro cassette tape recorder, and in the figure, 0
is the main body of the micro cassette tape recorder, and @ is the storage section for the micro cassette tape in this main body OD. (13041 is a thin flat speaker housed in two layers stacked on the back surface of the main body <11), and these two flat speakers α14 are arranged in the longitudinal direction of the back surface of the main body a9, that is, up and down. It is held by fitting into groove-shaped holding portions formed at both ends in the direction. The flat speakers (13<14) are not fixed to the main body OB, but can be pulled out by sliding them above or below the main body θB like cards, and as shown in FIG. It can be installed away from the main body OD and the plate-shaped speaker 03.
The two vessels are electrically connected to each other by a stretchable cord α'h Q8). Note that the cord αη (to) may be connected to the main body 0D and the small plate-shaped speakers 09α on both sides from the beginning, or may be connected during use as shown in FIG. Normally, a micro cassette tape recorder needs to be easily portable and can be used while being held in the hand, so as shown in Figures 4 and 5, flat speakers a:p (14) are connected to the main body (1).
It is also possible to make the sound emitted from the flat speaker (toward) located on the outside in a state in which 1) is stacked on top of the other. By the way, in this embodiment, 2 & flat speakers 03 are stacked and stored on the back of the main body aυ, but one flat speaker may be stored on the front and back of the two main bodies u9.

In addition, the flat speaker 0a can be attached to and removed from the main body a9 not only by pulling it out and inserting it in the vertical direction as in the above embodiment, but also by pulling it out and inserting it in the left and right directions.
Alternatively, a method using buttons or hooks may also be considered.

Next, a second embodiment shown in FIGS. 8 to 11 will be described. This second embodiment is an example of a small and thin radio receiver, and in the figure ■υ is the main body of the radio receiver,
@(c) is the main body G! Flat speakers are attached to the front and back of D so that they overlap, and both plate speakers (A) (Foundation) are connected to the main body Qυ by a flexible connecting part e4 (C) on the side. ing. These connecting parts (c) (c) function like so-called door hinges and have a bendable structure, so the two flat speakers @ (c) can be attached to the main body υ like a door. It is possible to open it to the unfolded state. Figure 11 shows the two flat speakers (22g!3) unfolded from the main body (2I).The flat speakers (to) (c) are electrically connected to the main body C21). As shown in FIGS. 8 to 10, sound can be emitted even when the device is placed over the main body (C). In addition, in this second embodiment, one flat speaker @ (to) is superimposed on the front and back sides of the main body ■υ, but two speakers are placed on either the front or back side of one main body CD. It is also possible to attach flat speakers so as to overlap them. In that case, the configuration of the first embodiment can be applied, and various methods of holding the speaker relative to the main body 1) can be considered.

By the way, in the embodiments described above, the present invention is applied to a micro cassette tape recorder and a radio receiver, but the present invention can be applied to all types of audio equipment that require speakers. Although the present invention requires the use of a thin flat speaker, this flat speaker can be realized using piezoelectric ceramics with a thickness of 3 mm or less.

The acoustic device of the present invention can be implemented as described above, and the #j-type flat speaker can be stored or attached to the main body of the acoustic device in a very compact manner, and it does not interfere with portability at all. It's very convenient. Furthermore, when it is necessary to widen the sound field such as in stereo reproduction, stereo reproduction is possible by separating only the flat speakers from the main body of the audio device or opening them like five doors. Therefore, there is no need to separately prepare headphones or external speakers, which is very convenient. In addition, stereo (if you do not need to sketch, you can use the flat speaker in the same way as before by stacking it on the main body side.

As described above, the audio device of the present invention is a small (4-inch) audio device that is very effective and has high utility value, especially when stereo reproduction is required.

[Brief explanation of drawings]

ff11 is a front view of a conventional micro cassette tape recorder, FIG. 2 is a front view of a conventional small and thin radio receiver, FIGS. 3 to 7 show a first embodiment of the present invention, and FIG. The figure is a front view, and Figure 4 is a bottom view. Fig. 5 is a side view, Fig. 6 is a rear view, Fig. 7 is a perspective view showing the state of use, Figs. 8 to 11 show the second embodiment of the present invention, Fig. 8 is a front view, FIG. 9 is a bottom view, FIG. 10 is a side view, and FIG. 11 is a perspective view showing the state of use. 0℃...The main body of the micro cassette tape recorder,
α3u4)... Flat speaker, (to) (IQ...
Holding part, 0η(2)... Cord, Qυ... Main body of radio receiver, (A) (1)... Flat speaker, ■ (C)
...Connection Department Agent Yoshihiro Morimoto Figure 1 Figure 2 Figure 3 Figure 5 /b 1j /4 Figure 6 Figure 7 Figure 7 ρ Figure 11 1J 13 1+ ti

Claims (1)

[Scope of Claims] l. An acoustic device in which a flat speaker can be stacked on the front or back surface or both sides of the main body of an acoustic device such as a small and thin radio receiver or microphone/q cassette tape recorder. 2. The acoustic device according to claim 1, wherein the flat speaker is slidable downward or in the left-right direction with respect to the main body of the acoustic device. 3. The acoustic device according to claim 1, wherein the flat speaker can be attached to and detached from the main body of the acoustic device using a button, a hook, or the like. 4. Claim No. 4, wherein one side of the flat speaker is connected to the audio device main body via a bendable flexible connecting portion, so that the flat speaker can be expanded from the audio device main body in the shape of a door. The acoustic device according to item 1. 5. The acoustic device according to claim 1, wherein the flat speaker is constructed using piezoelectric ceramic.