JPS6129196A - Acoustic device - 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 Field of Industrial Application The present invention relates to an audio device that can be used in a television receiver or the like.

Conventional configurations and their problems In recent years, with the progress of systemization of audio/visual equipment, the shape of Ten Vision receivers has become significantly more compact in relation to other AV equipment. One of the factors that hinders the miniaturization of receivers is the shape of the speakers.
7-Kaka Kojiro 181 "-Mounts and speaker mounting positions have been improved.

The mounting positions of a conventional television receiver and speakers will be explained below.

FIG. 1 is a perspective view of a conventional television receiver, in which a cathode ray tube 2 is attached to a cabinet 1, and a front plate 7 made of glass or transparent resin is attached to the front of the cabinet 1 using fixtures 3, 4, and 5.6. , speaker 9 on side 8 of cabinet 1
is installed.

By attaching the speaker 9 to the side surface 8 of the cabinet 1 in this way, the width of the television receiver can be reduced. However, since the speaker has directional sound pressure characteristics, it is necessary to install the speaker 9 at a position offset from the front axis of the speaker. In other words, in front of the television receiver, the high-frequency sound pressure decreases significantly.
There was a problem that the sound quality deteriorated. Furthermore, since the speakers are located on the side, if there is an obstacle on the side, it becomes difficult to reproduce sound, and there is a problem in that the installation location of the television receiver is restricted.

In order to solve these problems, a speaker system was devised in which a drive unit is attached to a front plate provided in front of a cathode ray tube and the front plate is used as a diaphragm.

A speaker using this method will be explained below.

In FIG. 2, 1o is a drive unit attached to the front plate. Others are the same as in FIG. 1, and their explanation will be omitted. The drive unit 10 is of an electromagnetic type.

It may be either an electrodynamic type or a piezoelectric type.

The operation of the acoustic device configured as described above will be explained below.

The drive unit 1o vibrates in response to applied electrical signals. That is, it acts as a vibrator, and since the vibrator is fixed to the front plate 7, the vibration of this vibrator causes the front plate to vibrate. Since the front plate 7 covers the entire surface of the cathode ray tube, its area is much larger than the area of the diaphragm of a conventional speaker, and therefore the vibration from the drive unit attached to the end of the front plate can be efficiently output as sound. It can be converted into .

In this system, the front panel of the television receiver operates as a speaker, so it has the advantage that there is no deterioration in sound quality due to the influence of directivity, and there is no restriction on the installation location as in the conventional example shown in FIG.

□However, in the above configuration, the front plate 7 is fixed to the cabinet 1 using the fixtures 3, 4, and 6.6, which is a very unstable fixing method, as shown in the cross-sectional view of Figure 4. However, there were problems such as chattering noises and unstable low-frequency sound pressure characteristics when a large input was applied, and the conventionally thick front panel had limitations in terms of sound quality.

Purpose of the Invention The present invention solves the above-mentioned conventional problems, and aims to provide an audio device that can make a television receiver more compact and has excellent sound quality. It is something.

Structure of the Invention In the present invention, a front panel made of transparent resin that is thinner than a normal front panel is provided, a highly rigid frame is attached to the periphery of this front panel, and this frame is fixed to the cabinet via a cushioning material. This is an audio device for TV receivers in which the front panel is driven by a drive unit, and by making the front panel thinner than normal ones, the vibrations of the drive unit are more efficiently converted into sound output. It is possible to improve the sound quality.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
FIG. 4A is a partially cutaway perspective view showing the state in which the front panel of the television receiver is attached in the first embodiment of the present invention. Cabinet 1 through 13
It is fixed to the notch provided at the front opening end of No. 4 with adhesive or the like. The difference from the configuration shown in FIG. 3 is that the front plate 11 is made thinner than the normally used front plate to the extent that it can be processed, and a highly rigid frame 12 is fixed to the peripheral edge of the front plate 11. Cabinet 14 via cushion material 13
This is a point that is fixed with an adhesive or the like within a notch provided at the front opening end of the. Note that the drive unit is fixed to the front plate 11 as in the case of FIG. 3.

The operation of the acoustic device configured as described above will be explained below. Vibrations of the drive unit are transmitted to the front plate 11 in response to electrical signals applied to the drive unit.

Since a cushioning material 13 is provided on the joint surface between the front plate 11 and the cabinet 14, this cushioning material 13 acts as a suspension for the front plate 11 which operates as a diaphragm.

In addition, the front plate 11 is made thinner than the normally used front plate, and the periphery of the front plate 11 is fixed with a highly rigid frame 12, so that the vibration of the drive unit is converted into acoustic output more efficiently. be able to.

FIG. 4B shows the frame 1 fixed to the periphery of the front plate 11.
The front plate 11 is formed by forming the shape of 5 into a U-shaped cross section.
This makes it possible to further ensure the support of

Effects of the Invention As described above, according to the present invention, a front plate formed thinner than usual is fixed with a highly rigid frame at its periphery, and this frame is attached to the cabinet via a cushioning material. The fixing conditions around the periphery of the cabinet can be stabilized, the chattering noise generated between the front panel and the cabinet can be eliminated, and the low-frequency characteristics can be stabilized. It is possible to provide a television receiver.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional television receiver with speakers attached to the side, FIG. 2 is a perspective view of a conventional television receiver that uses a front plate as a diaphragm, and FIG. 3 is a partial sectional view of the same. FIG. 4A is a partially cutaway view showing a state in which the front plate of the audio device is attached in one embodiment of the present invention, and FIG. 4B is a partially cutaway view of another embodiment in which the shape of the frame is improved. 11...front plate, 12, 16...frame, 13...cushion material, 14...cabinet. Name of agent: Patent attorney Toshio Nakao and 1 other artist
1 Figure G Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A highly rigid frame is attached to the periphery of the thin transparent resin front plate provided in front of the cathode ray tube, this frame is fixed to the cabinet via cushioning material, and the front plate is driven by a drive unit. sound equipment.