JPH0748910B2 - Speaker mounting device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker mounting device, and more particularly to a means for reducing adverse effects of speaker vibration on a recording / reproducing system in a magnetic recording / reproducing device having a speaker built therein. It has characteristics.

2. Description of the Related Art In recent years, video tape recorders (VTRs) have been downsized,
Although a speaker built-in type has been put into practical use so that the user can enjoy video and audio on the spot, there is a problem in that the vibration of the speaker causes the outer case to vibrate and the reproduced image to shake. For this reason, the configuration shown in FIGS. 3 and 4 has been conventionally used. In FIGS. 3 and 4, 1 is an outer case. Reference numeral 2 is a speaker, 6 is an annular rubber plate, and the rubber plate 6 is sandwiched between the outer case 1 and the frame of the speaker 2 so that the vibration of the speaker 2 is not transmitted to the outer case 1, and is fixed with a fixing screw 7. It was a composition.

However, in the above-mentioned configuration, vibration is transmitted to the outer case through the fixing screw, and the screw is used to fix the speaker. Therefore, the vibration is transmitted from the rubber itself and a sufficient damping effect is obtained. It had a problem that it could not be done.

In view of the above problems, the present invention provides a speaker mounting device that is inexpensive and can obtain a sufficient vibration damping effect.

Means for Solving the Problems In order to solve the above problems, a magnetic recording / reproducing apparatus with a built-in speaker of the present invention has an elastic body layer such as a sponge or a maltoplane disposed in front of and behind the outer peripheral portion of the speaker frame. The speaker is fixed to the outer case in a state that the frame of the speaker is sandwiched between the layers, and a shield plate is interposed between the elastic body layers.

Effect According to the above configuration, since the speaker is fixed to the outer case with the frame of the speaker being sandwiched by the elastic layers, the speaker is fixed to the outer case without being connected to the outer case by the rigid body. In addition, the vibration propagation to the outer case can be reduced, and since the mounting screw does not have to be used, the thickness of the outer case can be thin. Furthermore, by interposing a shielding plate between the elastic layers, there is no reduction in frequency characteristics in the low frequency range due to sound loss before and after the speaker through the elastic layers.

Example A speaker mounting device according to an example of the present invention will be described below.
A description will be given with reference to the drawings.

1 and 2 are a sectional view and a rear view in an embodiment of the present invention. In FIG. 1 and FIG. 2, the above-mentioned third
The same components as those shown in FIGS. 4 and 5 are designated by the same reference numerals.

The difference between the present embodiment and the conventional configuration is that the speaker 2 is fixed by the fixing screw 7 in the conventional configuration, but in the present embodiment, the front and rear of the outer peripheral portion of the frame of the speaker 2 are elastic with a high foaming rate such as sponge. A plurality of cut-and-raised parts provided in the outer case 1 are housed in a fixed case 5 made of a cylindrical rigid body in which one of the cases is opened in the body layer 3 and a through hole 5a is formed in the center of the bottom surface. It is fixed using 1a.

That is, as shown in FIG. 2, a projection 5c is provided in the opening of the fixed case 5 so as to project outward, and the projection 5c is positioned so as not to face the cut-and-raised portion 1a. In this state, the fixed case 5 is attached, and thereafter, by rotating the fixed case 5 in the direction of the arrow, the protrusion 5c is cut and raised.
It is located below 1a, and the fixed case 5 is mounted and fixed to the outer case 1 in the state shown in FIG.

With the above configuration, the speaker 2 itself is in a state of floating on the elastic layer 3 without directly contacting the rigid body, and the vibration reducing effect of the elastic layer 3 causes the speaker to be attached to the outer case 1. The vibration of 2 is not transmitted. Further, since the thin film 4 made of tape, film or the like is interposed between the elastic layers, sound leakage before and after the speaker is prevented through the elastic layer having a high foaming rate.

EFFECTS OF THE INVENTION As described above, according to the present invention, the speaker is fixed to the outer case in a shape sandwiched by elastic layers such as sponge, so that it is possible to obtain a vibration reduction effect higher than that of the conventional case, and to reduce the noise drop. The frequency characteristic of the range is not reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of a speaker mounting device according to an embodiment of the present invention, FIG. 2 is a rear view thereof, FIG. 3 is a sectional view of a conventional speaker mounting device, and FIG. 4 is a rear view thereof. 1 ... Exterior case, 2 ... Speaker, 3 ... Elastic body, 4
...... Thin film, 5 ...... fixing case, 6 ...... rubber, 7 ...... fixing screw.

Claims (1)

[Claims] 1. An elastic body positioned on the rear surface of a frame of a speaker, wherein front and rear portions of an outer peripheral portion of the frame are covered with elastic layers, and an elastic layer positioned on the front surface of the frame is brought into contact with a case. A speaker mounting device characterized in that the speaker is fixed to the case by pressing a layer, and a thin film that blocks sound propagation is interposed between the elastic layers.