JPH02179097A - Speaker mounting device - Google Patents

Abstract

PURPOSE:To prevent a low-pass frequency characteristic from being reduced by covering the front and rear of the outer peripheral part of the frame of a speaker with elastic layers, and fixing the speaker on a case by pressing the elastic layer, and providing a thin film between the elastic layers. CONSTITUTION:The front and rear of the outer peripheral part of the frame of the speaker 2 are covered with the elastic layers 3 with high foaming ratio such as sponge. The speaker is housed in a fixed case consisting of a cylindrical rigid body whose one end is opened and in the center part of the bottom plane of which a through hole 5a is formed. After that, it is fixed by using plural erecting parts 1a provided on an armor case 1. By employing such constitution, the speaker 2 is set at a state where it floats in the elastic layer 3, and no oscillation of the speaker is transmitted to the case 1 by the oscillation reducing effect of the layer 3. Also, the thin film 4 such as a tape film is provided be tween the layers 3, which prevents sound leakage in the neighborhood of the speaker via the layer 3 with high foaming ratio from occurring.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a speaker mounting device.

Particularly, in a magnetic recording/reproducing device having a built-in speaker, the present invention is characterized by a means for reducing the adverse effects of speaker vibration on the recording/reproducing system.

Background of the Invention In recent years, video tape recorders (VTRs) have become smaller and have come into practical use with built-in speakers so that you can enjoy video and audio on the spot. There is a problem with shaking. For this reason, the configurations shown in FIGS. 3 and 4 have conventionally been used. In FIGS. 3 and 4, 1 is an exterior case.

2 is a speaker, 6 is an annular rubber plate, and this rubber plate 6 is inserted 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;
It was configured to be secured with a fixing screw.

Problems to be Solved by the Invention However, with the above configuration, vibrations are transmitted to the exterior case through the fixing screws, and since the screws used to fix the speaker are tightened, vibrations are also transmitted from the rubber itself, and a sufficient vibration damping effect cannot be achieved. The problem was that it could not be obtained.

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

Means for Solving the Problems In order to solve the above-mentioned problems, the magnetic recording/reproducing device with a built-in speaker of the present invention has an elastic layer such as sponge or maltblane disposed before and after the outer periphery of the speaker frame. The speaker is fixed to an exterior case with the frame of the speaker sandwiched between the layers, and a shielding plate is interposed between the elastic layers.

Effects According to the above configuration, the speaker is fixed to the outer case with the speaker frame sandwiched between the elastic layers, so the speaker is fixed to the outer case without being connected to the outer case by a rigid body, which is different from conventional methods. Vibration propagation to the exterior case can be reduced, and since there is no need to use mounting screws, the thickness of the exterior case can be reduced. Furthermore, by interposing the shielding plate between the elastic layers, there is no reduction in low frequency characteristics due to sound leakage before and after the speaker through the elastic layers.

Example Below, regarding a speaker mounting device according to an example of the present invention,
This will be explained with reference to the drawings.

FIGS. 1 and 2 are a sectional view and a rear view of an embodiment of the present invention. In this figure 1 and figure 2, the above-mentioned 3
Components that are the same as those shown in the figures and FIG. 4 are given the same reference numerals.

The difference between this embodiment and the conventional configuration is that in the conventional configuration, the speaker 2 is fixed with a fixing screw 7, but in this embodiment, the front and rear of the outer periphery of the frame of the speaker 2 is It is wrapped in body layer 3 and housed in a fixed case 6 made of a cylindrical rigid body with one side open and a through hole 6a formed in the center of the bottom, and then a plurality of cutouts provided in exterior case 1. It is fixed using 1a.

That is, as shown in FIG. 2, a protrusion 6C is provided at the opening of the fixed case 6 so as to protrude outward, and this protrusion 6C is positioned at a position not facing the cutout 1a. Attach the fixed case 6 in the state shown in FIG. It is installed and fixed.

With the above configuration, the speaker 2 itself is floating on the elastic layer 3 without being in direct contact with a rigid body, and the vibration reduction effect of the elastic layer 3 allows the speaker 2 to be attached to the outer case 1. This prevents the vibrations of the speaker 2 from being transmitted. Furthermore, since a thin film 4 made of tape, film, etc. is interposed between the elastic layers, sound leakage from the front and back of the speaker through the elastic layer with a high foaming rate is prevented.

Effects of the Invention As described above, according to the present invention, since the speaker is fixed to the exterior case by being sandwiched between elastic layers such as sponge, it is possible to obtain a vibration reduction effect greater than that of the conventional method, and also to reduce noise. This also eliminates the reduction in low frequency characteristics due to dropouts.

[Brief explanation of the drawing]

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. Curved/fixed case, 6.. Rubber, 7.. Fixing screw. Name of agent: Patent attorney Shigetaka Awano (1 person)

Claims (1)

[Claims] Covering the front and rear of the outer periphery of the speaker frame with elastic layers, and pressing the elastic layer located on the rear surface of the frame while the elastic layer located on the front surface of the frame is in contact with the case. A speaker mounting device, wherein the speaker is fixed to the case, and a thin film for blocking sound propagation is interposed between the elastic layers.