JPS5833392A - Loudspeaker device - Google Patents

Abstract

PURPOSE:To discharge the rainwater to the outside if it goes into a case and to prevent the devices within the case from being damaged by providing a through hole linking the inside and the outside of the case at the fringe part of a loudspeaker or at the lower part of the speaker containing side of the case. CONSTITUTION:A loudspeaker 2 having the waterproof treatment applied on the surface is attached at the opening part of a water resistant case 1, and at the same time an electronic circuit device 3 of a sound generator, etc. is attached at the bottom part of the case 1. A water resistant partitioning wall 4 is set between the speaker 2 and the device 3 to separate them from each other. A small through hole 5 of about 1mm.X2mm. is formed at the fringe part of the speaker 2 to ensure the linkage between the speaker containing side within the case 1 and the outside of the case 1. In such constitution, the rainwater if goes into the area at the spaker containing side within the case 1 is discharged outside the case 1 through the hole 5 and the vibrating pressure of the speaker 2. Thus the devices within the case 1 can be prevented from being damaged by the rainwater.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a public address system in which a speaker and an electronic circuit are housed in the same case, and particularly to a waterproof structure for a public address system installed outdoors.

The structure of a conventional public address system is shown in FIG. A speaker 2 whose surface is waterproofed is attached to the opening of the waterproof case 1, and an electronic circuit 3 such as a sound generation circuit made of a solid-state memory element is installed at the bottom of the waterproof case 1. Attached 2. In a public address system having such a structure, if the speaker 2 is damaged and, for example, rainwater enters the case 1 through the damaged part, the electronic circuit 3 will become inoperable in a short period of time due to the water. There was a drawback.

The present invention aims to eliminate such drawbacks.An embodiment of the present invention will be described below with reference to FIG. 5.

A speaker 2 whose surface is waterproofed is attached to the open end of the waterproof case 1, and an audio generating circuit 3 is attached to the bottom of the case 1.

A waterproof partition wall 4 is provided between the speaker 2 and the electronic circuit 3 to isolate the respective housing portions. A small through hole with a size of 1 mm x 2 mm is provided at the edge of the speaker 2, and the speaker storage side inside the case 1 communicates with the outside. According to a loudspeaker having such a structure in which a waterproof cover 6 is attached to the outside of the through hole 5, even if the speaker 2 is torn and water flows into the case 1 through the torn part, The electronic circuit 3 is isolated from water by the waterproof partition wall 4 and therefore operates normally. In addition, the partition wall 4
The water that has flowed between the speaker 2 and the speaker 2 is pushed out through the small through hole 6 by the vibration pressure of the speaker 2. Since a waterproof cover 6 is provided on the outside of the through hole 5, water will not enter the case 1 from the outside through the through hole 5. In this embodiment, a through hole is provided at the edge of the speaker 2 to connect the speaker storage side of the case 1 to the outside, but a through hole is provided at the lower part of the speaker storage side of the case 1. The same effect can be obtained.

As explained above, in the loudspeaker system of the present invention, the speaker and the electronic circuit housed in the same case are separated by a waterproof partition wall, so if the speaker is damaged, rainwater etc. may leak from the damaged part. Even if it gets inside the case, it will not reach the electronic circuit and will prevent the electronic circuit from being damaged.Also, there is a transparent material on the edge of the speaker or on the lower part of the speaker housing side of the case. A hole has been set up inside the benioshi and torenyo yam 8-7. Since the speaker housing side is connected to the outside, even if rainwater enters the inside of the case, it will be pushed out by the vibration pressure of the speaker.
be excluded.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an example of a conventional loudspeaker, and FIG. 2 is a cross-sectional view of an embodiment of the loudspeaker according to the present invention. 1...Call, 2...Speaker, 3.
...Electronic circuit, 4...Waterproof bulkhead, 6
......Through hole. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 11' Indication of the case of Mr. Commissioner of the Japan Patent Office No. 127649 of 1981 2. Name of the invention loudspeaker 3. Person making the amendment 1.1 Patent/Application
Address 1006 Oaza Kadoma, Kadoma City, Osaka Name (582) Matsushita Electric Industrial Co., Ltd.
Toshihiko Yamashita 4 Agent 571 Address 1006 Bold Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 6 Specification Subject to Amendment 1, Name of the Invention Loudspeaker 2, Claims Attaching the speaker to the case The loudspeaker is further characterized in that a through hole is provided at an end edge of the speaker or at a lower part of the case on the speaker housing side, through which the speaker housing side communicates with the outside. 3. DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterproof structure for a loudspeaker and a loudspeaker, particularly for a loudspeaker installed outdoors. The structure of a conventional public address system is shown in FIG. A speaker 2 whose surface has been waterproofed is attached to the opening of the waterproof case 1, and an electronic circuit device 3, such as a sound generator made of a solid-state memory element, is attached to the bottom of the waterproof case 1. is attached. In a public address system having such a structure, even if the speaker 2 is installed in a watertight state by interposing a backing to the case 1 and the temperature is set to -4, a pressure difference between the inside and outside of the case 1 will occur due to temperature changes. Due to this pressure difference, it was inevitable that rainwater etc. would infiltrate into the case 1. Once water enters the case 1, it stays in the case 1 for a long time, rendering the electronic circuit device 3 and the speaker 2 inoperable. The present invention has been made to solve this problem, and a through hole is provided at the edge of the speaker or at the lower part of the speaker storage side of the case to communicate the inside of the case with the outside, thereby preventing rainwater from entering the case. Even if water enters the water, it is constructed so that the sound pressure generated when the speaker operates is used to eject it to the outside of the case 1 through the through hole, thereby preventing the equipment inside the case 1 from being damaged by water. be. One embodiment will be described below with reference to the drawings. A speaker 2 whose surface is waterproofed is attached to the opening of the waterproof case 1, and an electronic circuit device 3 such as a sound generator is attached to the bottom of the case 1. A waterproof partition wall 4 is provided between the speaker 2 and the electronic circuit device 3 to isolate the housing portions of the speakers 2 and the electronic circuit device 3. 1 my x 21 Nm at the edge of speaker 2
A small through hole 5 with a size of 1 is recessed, thereby communicating the speaker storage side inside the case 1 with the outside. A waterproof cover 6 is attached to the outside of the through hole 5. According to the loudspeaker system having such a structure, the speaker storage side of the case 1 is communicated with the outside through a small through hole, so even if rainwater or the like enters the speaker storage side, this water will not flow away. The vibration pressure of the speaker 2 pushes it out through the small through hole 5. Since the waterproof cover 6 is provided on the outside of the through hole 5, there is almost no possibility that water will enter the case 1 from the outside through the through hole 5. Even if the speaker 2 is broken and water flows into the case 1 from the broken part, the electronic circuit 3
Since it is isolated from water by the waterproof partition wall 4, it operates normally. In this example, a through hole is provided at the edge of speaker 2 that connects the speaker storage side of case 1 with the outside, but a through hole is provided at the bottom of the speaker storage side of case 1. The same effect can be obtained even if holes are provided. As explained above, in the loudspeaker of the present invention, a through hole is provided at the edge of the speaker or at the lower part of the speaker housing side of the case, thereby communicating the speaker housing side inside the case with the outside. Therefore, even if rainwater or the like were to get inside the case, it would be pushed out and removed by the vibration pressure of the speaker. Therefore, water does not remain inside the case for a long time, and there is no fear that the speaker lead wire connection portion inside the case will corrode. 4. Brief Description of the Drawings FIG. 1 is a cross-sectional view showing an example of a conventional loudspeaker, and FIG. 2 is a cross-sectional view of an embodiment of the loudspeaker according to the present invention. 1...Case, 2...Speaker, 3...
...Electronic circuit device, 4...Waterproof bulkhead,
6...Through hole.

Claims (1)

[Claims] The speaker and electronic circuit are housed in the same case.
A waterproof partition is provided in the case between the speaker side and the electronic circuit side, and a waterproof partition wall is provided between the speaker side and the electronic circuit side, and the speaker housing side portion is provided at the edge of the speaker or at the lower part of the speaker housing side of the case. 1. A loudspeaker device characterized by having a through hole through which the and the outside communicate with each other.