JPH08699Y2 - Underwater sound generator for creating water stream containing polka dots - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater sound generator for producing a water stream containing a water drop when a fountain or waterfall is made beautiful by the brilliance of a water drop for the purpose of admiration or observation.

[0002]

2. Description of the Related Art Underwater sound is generated by giving periodic vibrations to a water flow, and when the dense portion of the underwater sound reaches a narrowed jet port, water molecular motion becomes active and pressure increases, When a portion where this molecular motion is active ejects from the ejection port, that portion forms a polka dot in the ejected water stream, and the water stream containing this polka dot is illuminated by continuous strobe light to express the water stream. However, Japanese Patent Publication No. 61-26068 (Patent No. 137115) relating to the invention of the present applicant.
No. 6) "Method of creating water stream containing polka dots by underwater sound".

A device for obtaining a fountain of a multi-branch water flow for ornamental use, utilizing the above-mentioned "method of creating a water flow containing water drops by underwater sound", is also related to the invention of the present applicant in Japanese Patent Application No. 2-3.
No. 24116 “Multi-branch water flow generator including underwater sound” has been filed.

Further, the multi-branched water flow is alternately irradiated with continuous strobe light of two or more colors to cause each fountain flow to have polka dots shining in the respective colored lights, and by changing the emission frequency of the strobe light of each color. Japanese Patent Application No. 2-25 relating to the invention of the applicant of the present invention is also a method of increasing the ornamental value by showing different polka dots for each color of stroboscopic light as different movements.
No. 3533, "Method for Identifying Moving Granular Object".

The conventional method of producing underwater sound in running water is as follows: (a) A method of producing underwater sound by hitting a running water pipe with a hammer of an electromagnetic timer, as shown in Japanese Patent Publication No. 61-26068. (B) An alternating current is applied to the vibration coil attached to the back surface of the vibrating membrane whose surface is in contact with running water, as shown in the specification and drawings of Japanese Patent Application No. 2-324116, to form a permanent magnet. There is a method in which the vibrating membrane vibrates when receiving the force of a magnetic field to generate underwater sound.

[0006]

The above-mentioned conventional underwater sound generation method (a) has the drawback that the flow velocity at the central portion of the fountain flow becomes large and it is easy to project and separate from the fountain flow.
In the case of (b), the polka dot generation condition is better than in the method of (a) above, but the vibration coil is attached to the vibrating membrane and vibrates together, so the device is difficult to manufacture. It was Therefore, an underwater sound generator capable of solving the difficulty in manufacturing the device by the method (b) is an issue.

[0007]

DISCLOSURE OF THE INVENTION The present invention relates to an underwater sound generator for causing water droplets to be included in a fountain flow ejected from a nozzle by giving periodic vibrations to the water flow, and across a cylinder through which the water flow passes. The end face of the protrusion part of the core, which has a columnar upward protrusion with a coil fitted around the center part of the vibrating film made of an elastic material, whose upper surface is stretched so as to contact the running water, vibrates above the vibration. separating the membrane and suitable space in correspondence, the opposite to the end face of the core above the vibrating film on the upper surface center fitted with a permanent magnet Rutotomoni, the vibrating membrane and the projecting portion of the core
The vibrating membrane is supported by interposing a sponge between it and the end face.
It was, in-water sound generating device for creating a polka dot-containing water flow.

[0008]

[Action] An AC magnetic field generated by an AC current in the coil acts on the permanent magnet, and by vibrating the permanent magnet, the vibrating membrane to which the permanent magnet is attached vibrates, and the flowing water passes through the underwater sound generator. Underwater sound is generated. This underwater sound appears as water droplets in the fountain flow ejected from the nozzle attached to the end of the tube connected to the underwater sound generator, and a large number of fountain flows including this water droplet are collected to provide an ornamental fountain. If you create a waterfall and irradiate it with continuous strobe light, the polka dots will shine beautifully and you will get fountains and waterfalls that are highly ornamental.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is a central longitudinal side view showing an embodiment of the underwater sound generator of the present invention, FIG. 2 is a plan view of the same, in which (1) is a bottomed cylinder, (2) is a main cylinder, and (3) is a lid. Then, the lower end of the main body cylinder (2) is connected to the upper end of the bottomed cylinder (1) with the vibrating membrane (4) made of an elastic material interposed therebetween.
A water supply pipe (5) is provided on the peripheral wall near the lower end of the main body cylinder (2), and the upper end of the main body cylinder (2) is closed by a lid (3). The inverted conical body (6) hangs down at the center of the main body cylinder (2), and a plurality of (12 in the figure) water flow branch pipes (7) are provided upward on the circumference near the outer circumference of the upper surface. A tube (not shown) having a nozzle at its tip is connected to each of the water flow branch pipes (7).

Inside the bottomed cylinder (1), a core (8) having an upwardly projecting cylindrical protrusion at the center is provided between the end face (8a) of the protrusion and the lower surface of the vibrating membrane (4). Space (9)
And the ring-shaped coil (10) is fitted around the protruding portion of the lead wire (1).
An alternating current is supplied by 1).

The end face (8) of the protrusion at the center of the upper surface of the vibrating membrane (4)
A lightweight and strong permanent magnet (12) is attached at a position corresponding to (a), and a sponge (13) is interposed in the space (9) between the lower surface of the vibrating membrane (4) and the end surface (8a) of the protrusion. Thus, the vibrating membrane (4) is prevented from hanging down due to the weight of the permanent magnet (12) or water pressure.

With the above structure, when water is supplied from the water supply pipe (5) into the main body cylinder (2) and an alternating current is passed from the lead wire (11) to the coil (10), the core (8) and the coil (8) By 10), a strong AC magnetic field is generated in the vicinity of the end surface (8a) of the protruding portion, which acts on the permanent magnet (12) to vibrate the permanent magnet (12) at the same frequency as the AC frequency, The vibrating film (4) vibrates in response to the vibration of the magnet (12), and underwater sound is generated in the flowing water flowing upward in the main body cylinder (2). At this time, the permanent magnet (1
Although 2) generates heat, it is cooled because it is in contact with running water.

This underwater sound fills an annular space that is narrowed toward the upper side and is formed by the inner circumference of the main body cylinder (2) and the outer circumference of the inverted conical body (6), and flows under the flowing water. To form a water dot in a fountain flow ejected from a nozzle (not shown) through the above-mentioned tube (not shown) from the water flow branch pipe (7). The principle of forming this water dot is the conventional technique. Japanese Patent Publication Sho 61
The detailed description is omitted here in "Method of creating water stream containing polka dots by underwater sound" of Japanese Patent Publication No. 26068.

The water stream containing the polka dots obtained in this way is added to the above-mentioned Japanese Patent Application No. 2-253533.
By using the method of irradiating two or more colors of multi-strobe light related to the invention of the method of identifying a moving granular object, a beautiful fountain or waterfall in which the waterdrops included in the fountain flow shine red or blue. Is what you get.

FIG. 3 shows a vertical side view of a conventional underwater sound generator. The coil (110) is attached to the back surface of the vibrating membrane (104) and fitted inside the bottomed cylinder (101). The lower half of the permanent magnet (112) is inserted into the ring-shaped groove (113) formed in the center of the upper surface of the permanent magnet (112) with a gap between the inner and outer peripheries, and the coil (110) has the lead wire (1).
When an alternating current is supplied from 11), the coil (110) vibrates vertically due to the action of the permanent magnet (112), and the vibrating membrane (104) tunes and vibrates to generate an underwater sound as in the case of FIG. It is a thing.

In this case, since the coil (110) vibrates, it is necessary to make it light, but the larger the number of turns, the better the solution of this contradiction.
There was a manufacturing difficulty in mounting the vibrating membrane (104) having elasticity so that 10) would not come into contact with the ring-shaped groove (113) of the permanent magnet (112) with as small a gap as possible.

In this respect, according to the present invention, since the coil (4) is fixed and it is not necessary to make it light, the number of turns can be increased. However, since the permanent magnet (12) vibrates together with the vibrating membrane (4), it is necessary to use a magnet that is as light and strong as possible.

[0018]

According to the above-described underwater sound generator for producing a water stream containing polka dots according to the present invention, the coil serving as the vibration source is fixed and the permanent magnet is movable, so that it is extremely easy to manufacture. With less trouble, it can withstand long-term use.

[Brief description of drawings]

FIG. 1 is a side view of a central longitudinal section showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a central longitudinal side view showing a conventional example.

[Explanation of symbols]

 1 Bottomed Cylinder 2 Main Body Cylinder 3 Lid 4 Vibrating Membrane 5 Water Supply Pipe 6 Reverse Cone 7 Water Flow Branch Pipe 8 Core 8a Projection End Face 9 Space 10 Coil 11 Lead Wire 12 Permanent Magnet 13 Sponge

Claims (1)

[Scope of utility model registration request] 1. An underwater sound generator for imparting water droplets to a fountain flow ejected from a nozzle by giving periodic vibrations to the water flow so that an upper surface of the underwater sound generator crosses a cylinder through which the water flow passes and contacts the running water. Below the center of the vibrating membrane made of stretched elastic material, at the center, the end portion of the protruding portion of the core having a cylindrical upward protruding portion with a coil fitted around it is separated from the vibrating membrane by an appropriate space. in correspondence Te, on the vibrating film facing the end face of the core
Mounting a permanent magnet to face the center Rutotomoni, the vibrating film and the upper
A sponge is interposed between the core and the end surface of the protruding portion of the core.
An underwater sound generator for creating a water stream containing polka dots, characterized by supporting a moving membrane .