JPS6349999Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a waterproof loudspeaker device that is used by being attached to, for example, a dust mask.

As is well known, a waterproof loudspeaker is used by being attached to the mouthpiece A (generally a resin molded product) of a dust mask M or a gas mask as shown in the first diagram, for example, and is used to listen to the voice of the mask wearer. Used for amplifying sound. In other words, the waterproof loudspeaker has a mouth cap A.
A microphone MIC is fixed in the opening screw b of the sealed container B, and an amplifier AMP and a speaker SP are built in the sealed container B. Then, in order to transmit a call when necessary, there is a
A small-diameter switch cylinder C is integrally molded, a transmitter switch E consisting of a push button switch is fixed to the internal partition wall D of the switch cylinder C, and a flexible rubber cap F is placed over the outer end of the switch cylinder C. As a result, the operating axis e of the transmitter switch E can be operated externally.

However, with this structure, if the rubber cap cracks due to aging or repeated use, water will enter the switch tube C, causing water to enter the transmitter switch C, which may cause malfunctions or malfunctions. It's summery. Furthermore, although the transmitter switch C is often operated with a gloved fingertip, in the above-mentioned structure, the operating axis e of the transmitter switch E must be operated via a small rubber cap F, so it is necessary to operate the transmitter switch E quickly and appropriately. It may be frustrating to not be able to operate the switch accurately, and since the switch tube C protrudes outside the closed container B, an object may hit the switch tube C and cause damage.

In view of the problems of the conventional transmitter switch mechanism as described above, the present invention has been developed to prevent malfunctions or malfunctions due to repeated use or aging, and can be operated quickly and accurately even with gloved hands. The waterproof loudspeaker system is designed to have a substantially cylindrical shape, and is a waterproof loudspeaker system in which an amplifier and a speaker are installed in a sealed container that is attached to a dust mask, etc., and the sound is amplified by turning on a transmitter switch. A magnetically sensitive switch is incorporated in a sealed container, a rotating sleeve that can be semi-fixed at a predetermined rotational position is rotatably attached to the outer periphery of the sealed container, and a ferromagnetic material is fixed inside the rotating sleeve that can be manually rotated. This is what we propose to do.

Embodiments of the present invention will now be described in detail with reference to FIGS. 3 to 5.

FIG. 3 is a partially cutaway side view of the waterproof loudspeaker of the present invention, in which the cylindrical sealed container 1 is made of non-magnetic synthetic resin.
An amplifier AMP and a speaker are installed inside the airtight container 1.
It is the same as the conventional one in that the SP is built-in and the microphone MIC is attached to the screw portion 1a of the sealed container 1. The airtight container 1 has a holding piece 2 integrally molded on the inner periphery of the body 1b, and a magnetically sensitive switch shown as a reed switch 3 is held in this holding piece 2. The output of the MIC is input to the amplifier AMP. Further, on the outer periphery of the body 1b of the sealed container 1, a rotary sleeve 4 made of resin is rotatably supported, which can be gripped with a fingertip and rotated from side to side in FIG. A permanent magnet 6, ie, a ferromagnetic material, is fixed to an inner peripheral mounting seat 5 of a rotary sleeve 4 facing the switch 3. Of course, the magnetically sensitive switch is not limited to the reed switch 3, but may be any other magnetically sensitive element.

In addition, as shown in the fourth diagram, the body 1b of the airtight container 1
Two recesses 7 and 8 are formed at different positions in the circumferential direction on the outer peripheral surface of the recess. On the other hand, a semi-fixed spring 9 integrally molded is fixed in a cantilever manner to the inner peripheral surface of the rotary sleeve 4 corresponding to these recesses 7 and 8. Therefore, the semi-fixed spring 9
When the tip protrusion 9a falls into the recess 8 as shown in the figure, the permanent magnet 6 directly faces the reed switch 3 and the reed switch 3 is sensitive to the reed switch 3.
operates and the user's voice is amplified. Further, the rotary sleeve 4 is rotated from the illustrated state clockwise in FIG.
When it matches, the permanent magnet 6 moves to the position shown by the imaginary line, and the reed switch 3 is removed from the magnetic influence of the permanent magnet 6, so the transmitter switch is turned off.

In this invention, a magnetically sensitive switch is built into a sealed container, and the same magnetic switch is operated indirectly by a rotating sleeve outside the sealed container, so that the waterproof structure of the sealed container is not destroyed by repeated use or aging. Never. In addition, with the structure of the present invention, the transmitter switch can be controlled quickly and reliably by simply grasping the rotary sleeve with the fingertips and rotating it left and right, so it can be easily operated even with gloved hands, and Since there are no abnormal protrusions on the surface, there is no risk of it hitting something and breaking it.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional public address system for a dust mask shown with a part cut away, Fig. 2 is an enlarged sectional view taken along the - line in Fig. 1, and Fig. 3 is a side view of a conventional loudspeaker for a dust mask shown with a part cut away. 4 is a side view of the waterproof loudspeaker, FIG. 4 is a sectional view taken along line - in FIG. 3, and FIG. 5 is an enlarged sectional view taken along line - in FIG. 4. AMP...Amplifier, SP...Speaker, MIC...
Microphone, 1... airtight container, 3... reed switch (magnetic sensitive switch), 4... rotary switch,
6...Permanent magnet.

Claims (1)

[Scope of utility model registration request] In a waterproof loudspeaker system in which an amplifier and a speaker are installed in a sealed container that is attached to a dust mask, etc., and the sound is amplified by turning on a transmitter switch, a magnetically sensitive switch is installed in the sealed container formed in a substantially cylindrical shape, and A waterproof public address system, characterized in that a rotating sleeve that can be semi-fixed at a rotating position is rotatably attached to the outer periphery of the sealed container, and a ferromagnetic material is fixed inside the rotating sleeve that can be manually rotated. Transmission switch mechanism.