JPS641831Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a speaker mounting device for mounting a speaker inside a cabinet having a sound hole, such as in an audio device such as a radio or a tape recorder, so as to face the sound hole. It is.

Configuration of a conventional example and its problems The configuration of a speaker mounting device in a conventional audio equipment will be described with reference to FIGS. 1 and 2. 1 is a speaker, 2 is a mounting portion provided integrally with the frame of the speaker, and a mounting hole 2a is provided at the end. 3 is a cabinet for a radio, tape recorder, etc.; 3a is a sound hole provided in the cabinet 3;
is a boss that is integrally provided with the cabinet 3 and protrudes from the inner surface of the cabinet. In the above configuration, the speaker 1 is opposed to the sound hole 3a from the inner surface of the cabinet, and the screw 5 is passed through the mounting hole 2a to attach the mounting portion 2 to the boss.
The speaker 1 and the cabinet 3 were fixed by tightening.

By the way, a ring-shaped paper sealing material 6 called Yagami is pasted around the front opening of the speaker (on the inner surface of the outer periphery of the frame), and when the speaker 1 is fixed to the cabinet 3, this paper seal If the material 6 is in close contact with the inner surface of the cabinet around the sound hole 3a, the sound from the back side of the speaker 1 will not leak to the outside of the cabinet, that is, the sound waves of the reverse phase will not be mixed in, and there will be no muffled sound from the sound hole 3a. Sound is emitted.

However, in the conventional configuration, as shown in FIG. 2, a gap Ta between the boss 4 and the mounting portion 2 and a gap Tb between the inner surface of the cabinet and the surface of the paper sealing material 6 tend to occur. In other words, the paper seal material 6
The thickness of the boss 4 and the mounting part 2 vary considerably, so when the thickness of the boss 4 and the mounting part 2 are small,
can be tightly fixed with screws 5 to make the gap Ta zero, but a gap Tb occurs between the inner surface of the cabinet and the paper sealing material 6, and this gap Tb allows communication between the inside and outside of the cabinet 3. However, there was a drawback that the sound quality deteriorated, such as the sealing performance of the speaker 1 being impaired and the sound becoming muffled. On the other hand, when the thickness of the paper sealing material 6 is too large, the gap Tb becomes zero, but the gap Ta between the boss 4 and the mounting part 2
However, if the screw 5 is tightened too much, the frame of the speaker that is integrated with the mounting portion 2 will bend, making it impossible to install the speaker correctly.

Furthermore, in the above configuration, when warping occurs in the cabinet 3, the paper sealing material 6 is not particularly elastic and cannot absorb the dimensional error caused by the warping. It is also conceivable to use a sealing material such as rubber instead of the paper sealing material 6, but this would be costly in terms of material costs and workability.

Purpose of the Invention The present invention is intended to overcome the above-mentioned drawbacks of the prior art, and aims to provide a speaker mounting device that has a simple structure and can mount a speaker in close contact with the inner surface of a cabinet.

Structure of the Invention The speaker mounting device of the present invention is characterized in that an annular protrusion having a triangular cross section with an acute angle at the tip is provided on the inner surface of the cabinet at the periphery of a sound hole provided in the cabinet so as to surround the sound hole. It is something to do.

According to this configuration, when the speaker is tightened and fixed to the inner surface of the cabinet with screws, the sharp tip of the protrusion is uniformly embedded in the paper sealant, so variations in the thickness of the paper sealant are absorbed and the speaker is fixed. can be fixed tightly to the inside surface of the cabinet.

Further, even if some warpage occurs in the cabinet, the sharp tip of the protruding rim sinks into the paper sealing material, thereby absorbing the dimensional error caused by the warp and fixing the speaker in close contact with the inner surface of the cabinet.

DESCRIPTION OF THE EMBODIMENTS Fig. 3 shows the main parts of an embodiment of the present invention, and is a perspective view of the sound hole portion of the cabinet, Fig. 4 is a cross-sectional side view showing the speaker installed in the cabinet, and Fig. 5 is an enlarged sectional view of the main part. In this embodiment, the same members as in the conventional example are given the same numbers.

Reference numeral 7 denotes a protrusion provided on the inner surface of the cabinet 3 at the periphery of the sound hole 3a. This protrusion 7 is provided in an annular shape at a position facing the paper sealing material 6 of the speaker 1. Further, as is clear from the enlarged cross section, this protrusion 7 has an acute edge and has a triangular cross section.

When the mounting portion 2 of the speaker 1 is screwed to the boss 4 as shown in FIG. from the surface of the speaker 1.
and the cabinet 3 are fixed. In other words, by appropriately selecting the height of the protrusion 7, even if there is a considerable variation in the thickness of the paper sealant 6, the tip of the protrusion 7 will not touch the surface of the paper sealant 6 when installing the speaker. It's crowded. The amount of penetration will vary somewhat depending on the thickness of the paper sealant, but due to the occurrence of penetration, the paper sealant 6 and the protrusion 7 can seal the inside of the cabinet 3, allowing the speaker 1 to All of the sound is emitted outside the cabinet through the sound holes. That is, there is no sound leakage from the vicinity of the speaker 1, and good quality sound without muffled sound can be reproduced.

According to the above embodiment, the tip of the protrusion 7 is inserted into the paper sealing material 6 when the speaker 1 is attached, so when the thickness of the paper sealing material 6 varies, the amount of penetration does not change. You can always keep the cabinet sealed, so you can always hear high-quality playback sound.

Furthermore, according to the above configuration, even if warpage occurs in the cabinet, the amount of penetration of the tip of the protrusion 7 into the paper sealing material 6 partially changes to absorb the effect of warpage and maintain a sealed state. I can do it.

Effects of the invention The present invention provides an annular protrusion with a three-shaped cross section and an acute angle on the inner surface of the cabinet around the sound hole of the cabinet, and attaches the speaker so that the protrusion comes into pressure contact with the paper sealing material around the front of the speaker. By fixing it to the cabinet, the protrusion has an acute angle, so the edge of the tip will be evenly embedded into the surface of the paper sealant, so even if the cabinet warps, it will not penetrate into the paper sealant. The amount of insertion into the ridge at the tip of the ridge changes partially to absorb the effects of warping,
Can be kept sealed. Furthermore, even if there is variation in the thickness of the paper sealing material, it is absorbed by the tips of the protruding strips biting into the paper sealing material, and the speaker can always be tightly fixed to the cabinet.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing a conventional speaker mounting device, Fig. 2 is a sectional view showing its installation state, and Fig. 3 is an exploded perspective view showing a conventional speaker mounting device.
The figure is a partially cutaway perspective view showing the main parts of an embodiment of the present invention, and FIG. 4 is a sectional view showing the installed state of the embodiment.
FIG. 5 is an enlarged view. 1... Speaker, 3... Cabinet, 3a...
...Sound hole, 6...Paper seal material, 7...Protrusion.

Claims (1)

[Scope of utility model registration request] a cabinet provided with a sound hole; a ridge protruding in an annular shape surrounding the periphery of the sound hole on the inner surface of the cabinet and having a triangular cross section with an acute angle; a speaker attached so as to face the ridge; a paper sealing material annularly provided on the outer peripheral inner surface of the frame of the speaker so as to face the protrusion; and a tightening member, and when the tightening member is tightened, the sharp tip of the protrusion is pressed into contact with the paper sealing material so that it is uniformly embedded, and the speaker is tightly fixed to the cabinet. Speaker mounting device.