JP2008187401A - Megaphone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a megaphone with a generator capable of being simply charged even when a battery capacity is insufficient. <P>SOLUTION: A hand generator is fitted in a megaphone body. Alternately, the megaphone is composed of a horn mouth, a megaphone body and a handle, the hand generator is housed in the megaphone body and the handle is fitted on the rear surface of the megaphone body. Alternately, the handle is fitted on the side face of the megaphone body. The megaphone is composed of the horn mouth, the megaphone body and the handle, while a battery case being capable of being mounted and demounted to and from the megaphone body and housing a battery and the hand generator formed in an approximately the same shape as the battery case are mounted. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a megaphone, and more particularly to a megaphone equipped with a generator.

  In general, a megaphone is a portable type and is often used for broadcasting, guidance, and guidance in various events, events, and emergency situations. As described above, since the megaphone is a portable type, a battery is used as a power source. Therefore, battery management is important when using a megaphone. If battery management is not sufficient, when using a megaphone, the megaphone cannot be used due to insufficient battery capacity. Even if the battery capacity is sufficient, if the usage time of the megaphone becomes long, the battery capacity decreases and the megaphone cannot be used.

An emergency radio equipped with a generator is known from, for example, Patent Document 1 or 2, but a megaphone is not equipped with a generator.
JP 2000-174655 A JP 11-75344 A

  The present invention is a portable type, and is often used for broadcasting, guidance, and guidance. A megaphone is equipped with a generator, battery management is unnecessary, and charging is easy even when the battery capacity is insufficient. A megaphone equipped with a generator capable of being provided.

  The present invention is characterized in that a generator is housed inside the main body of the megaphone because of the above-described problems. This eliminates the need for a battery and allows the megaphone to be used at any time by generating electricity with a generator. If the generator is a hand-driven generator, the megaphone can be used by generating power by turning the rotary handle at any time.

The megaphone according to the present invention includes a horn mouse, a megaphone body, and a handle. The generator is housed in the megaphone body, and the rotating handle of the generator is provided on the rear surface of the megaphone body.
Furthermore, the megaphone of the present invention comprises a horn mouse, a megaphone body, and a handle, wherein the generator is housed in the megaphone body, and the rotating handle of the generator is provided on the side of the megaphone body. This makes it possible to use the megaphone while turning the handle and generating electricity.
The megaphone of the present invention comprises a horn mouse, a megaphone body, and a handle. The megaphone body can be replaced with a battery case for storing a battery, and a hand-driven generator formed in substantially the same shape as the battery case. It is to be prepared. Accordingly, the megaphone can be used by appropriately replacing the battery case and the hand-driven generator.

  According to the present invention, battery management is unnecessary, and the battery can be always used without worrying about insufficient battery capacity.

(First embodiment)
The megaphone according to the first embodiment of the present invention will be described below. The megaphone of the first embodiment is configured by combining a horn mouse 1, a megaphone body 2, and a handle 3 as shown in FIG.

  As shown in the cross-sectional views of FIGS. 2 and 3, the internal details of the megaphone include a magnetic circuit comprising a ring-shaped permanent magnet 11, a yoke 12, a plate A13a, and a plate B13b, and a plate A13a and a plate B13b. An electrodynamic part is configured by inserting a voice coil into a magnetic gap formed between the two. The upper end of the voice coil is coupled to the dome-shaped diaphragm 14, and the voice signal input to the voice coil acts together with the magnetic circuit to be converted into vibration of the diaphragm 14. A throat 16 integrally formed with the bottom surface 15 of the horn mouse 1 is provided in front of the diaphragm, and reflectors 17 and 18 are attached to the opening portion of the throat 16 so as to emit sound from the front end opening of the horn mouse 1. .

  A waterproof compound is applied to the surface of the throat 16 so that water does not enter between the throat and the diaphragm when the megaphone sinks in water. Here, a rare earth magnet is used as the permanent magnet 11, and the mass is reduced by about 150 grams compared to the case where a ferrite magnet is used. Further, the horn mouse 1, the megaphone body 2, the handle 3, and the reflectors 17 and 18 are made of light and weather-resistant resin having a specific gravity of 1.03 to 1.15. The reflector 18 is screwed to the horn mouse 1 by a screw 19 and the horn mouse 1 and the megaphone body 2 are coupled by tightening the screw 19 to the boss 20 of the megaphone body 2.

  The megaphone body 2 is formed in a bottomed cylindrical shape that forms a battery case storage portion 35 at the rear. When the megaphone body 2 is coupled to the horn mouth 1, a flat waterproof packing 6 made of rubber or flexible resin is sandwiched between the horn mouth 1 and the megaphone body 2 as shown in FIG. As a result, the opening of the megaphone body 2 is covered, the gap between the horn mouse 1 and the megaphone body 2 is filled, and the interior of the megaphone body 2 is made airtight and waterproof.

As shown in the rear view of the megaphone body in FIG. 4, the microphone unit 21 is disposed at the upper rear portion of the megaphone body 2. The microphone unit 21 includes a main microphone 22 and a sub microphone 23. The main microphone 22 and the sub microphone 23 are accommodated in a microphone presser through a thin film such as rubber having a buffering action and a waterproof action, and are attached to a rib 25 at the rear of the megaphone body 2. Install the megaphones side by side in the horizontal direction.
The main microphone 22 is arranged on a vertical line passing through the center line of the megaphone, and a small opening 26 is formed in the megaphone body 2 in front of the main microphone to input external sound vibration. The main microphone 22 is covered with a thin film of rubber or the like to obtain a waterproof effect, and by facing the opening 26, the sound vibration is sufficiently input. Further, since a thin film such as rubber has a buffering action, it is possible to prevent the vibration of the megaphone body from being input and to obtain an input signal having a high S / N.

The sub microphone 23 is used for preventing howling of the megaphone. Therefore, the megaphone body 2 in front of the sub microphone has a structure in which no opening is formed and no external sound vibration is input. For this reason, there is no opening in front of the sub microphone, and waterproofing can be performed completely.
In the megaphone, the voice vibration from the megaphone body circulates around the megaphone and enters the microphone, the voice vibration that the back pressure of the diaphragm passes through the megaphone and enters the microphone, and the vibration of the megaphone body itself Howling is caused by vibration input to the microphone. Among them, the sub microphone receives the vibration input by the back pressure of the speaker diaphragm through a narrow gap inside the megaphone and the vibration input from the megaphone itself into the microphone in the same phase as the main microphone. This is converted into an electrical signal and input to the amplifier in the opposite phase to the electrical signal from the main microphone, and mixing is performed to prevent howling.

  A printed wiring board 28 on which a circuit 27 made of electrical components such as an LSI, an IC, a resistor, and a capacitor constituting a 10 W class amplifier is mounted on the megaphone body. The printed wiring board 28 is attached so as to be sandwiched between the rib on the rear side of the megaphone body and the board holder 29. The substrate retainer 29 is provided with a positive connection terminal 30 and a negative connection terminal (not shown) made of a conductive and spring material such as phosphor bronze plate, and is screwed to the battery case housing rear wall 35b. The plus side connection terminal 30 is disposed at the rotation center of the battery case 4 to be described later. The minus side connection terminal is arranged as a ring electrode around the plus side connection terminal 30.

  A hole 32 through which a connection line for connecting to a power switch and volume attached to the handle 3 is formed and a rubber bush 32b is fitted to the lower part of the megaphone body 2. In addition, a battery case storage portion 35 is formed in the rear central portion of the megaphone body 2 in the axial direction of the megaphone. As shown in FIG. 3, the battery case storage portion 35 includes a cylindrical battery case storage side wall 35a formed integrally with the megaphone body 2 and a battery case storage rear wall 35b forming a bottom plate. A small opening 31 is formed in the central arrangement of the battery case housing rear wall 35b, and the tip of the positive connection terminal 30 protrudes from the opening. The minus side connection terminal is connected to a ring-shaped terminal plate (not shown) provided around the plus side connection terminal 30 protruding from the opening 31. A female screw 36 is formed on the inner periphery of the front opening of the battery case storage portion 35 to constitute one of the fitting structures.

As shown in FIG. 5, the battery case 4 is formed with a male screw 42 on the outer peripheral portion of a lid body 41 serving as a lid of the battery case storage portion 35 to constitute the other of the fitting structure, and the battery case storage portion 35. It is screwed into the female screw 36 formed in the opening portion. As shown in FIG. 6, three finger holes 41 a divided in three directions from the center are formed on the surface side of the lid, and the male screw of the battery case 4 and the battery case storage portion 35 are formed by the thumb, middle finger, and index finger. Make it easier to screw or remove the female thread.
The battery case 4 includes a cover body 41, a battery case upper portion 43, and a battery case lower portion 44. The battery case upper portion 43 includes a central cylindrical portion 43a and a battery terminal portion 43b formed at one end of the central cylindrical portion. Thus, one battery terminal is provided in the battery terminal portion 43b. The battery case lower 44 is provided with a battery storage wall 44a that is about 1/5 of the battery length, and is screwed to the central cylinder portion 43a for the other battery terminal. The battery terminal plate 45 is made of a highly conductive metal material, and is twisted in the middle to connect the positive electrode of one battery and the negative electrode of the next battery adjacent to the battery terminal board 45, and is arranged through the inner hollow of the central cylindrical portion 43a. . One of the battery terminal plates 45 is fixed so as to be wound around the battery terminal portion 43b, and constitutes a battery terminal.

The other end of the battery terminal plate 45 is fixed by being sandwiched between the center tube portion 43a and the center protrusion 44b of the battery case bottom 44, and the tip thereof is bent so as to contact the negative electrode of the battery to constitute a battery terminal. When the battery terminal plate 45 connects the positive and negative electrodes of adjacent batteries, all the six batteries inserted into the battery case are inserted in the same direction and connected in series.
The plus side terminals of the batteries connected in series are arranged at the center of the battery case lower 44, and the minus side terminals are arranged in parallel away from the center position. Therefore, when the male screw 42 of the battery case 4 is screwed into the female screw 36 of the battery case storage portion 35 and attached, the positive side terminal and the negative side terminal of the battery case are connected to the positive connection terminal 30 provided in the battery case storage portion 35. And the negative connection terminal. Thereby, the megaphone can operate using the battery as a power source.

As shown in FIG. 7, a hook 51 is attached to the front of the handle 3. The power switch is constituted by a micro switch 52 and is attached so as to be fitted into the rib 53a of the upper VRSW case 53. The volume 54 is attached by a VR nut so as to sandwich the upper 53 of the VRSW case. After the microswitch 52 and the volume 54 are attached in this way, the rubber cover 56 is sandwiched and the VRSW case lower part 57 and the handle stepped portions 3a and 3b are screwed together. A waterproof packing 55 is inserted into the rotary shaft of the volume 54 and a knob 58 is attached, and a part of the periphery of the knob 58 projects from a hole 59 behind the handle so that it can be operated.
Attach the hook 51 to the handle 3, attach the micro switch 52 and volume 54 to the upper VRSW case 53, and attach the knob 58. Then, part of the knob 58 protrudes from the hole at the rear of the handle and the rubber cover 56, VRSW Screws are inserted into the four screw holes of the upper 53 of the VRSW case and fixed to the mounting bosses 3a and 3b of the handle together with the lower case 57. The wiring of the micro switch 52 and the volume 54 is connected to the circuit 27 through the hole 32 of the megaphone body 2.

  As shown in FIG. 6, slide grooves are formed on both upper sides of the handle 3, and protrusions 33 (see FIG. 4) formed on the lower part of the megaphone body 2 are fitted into the slide grooves, and the handle 3 is attached to the megaphone body 2. The megaphone body 2 and the handle 3 are integrated. Thereafter, the horn mouse 1 is screwed and attached to the front of the megaphone body 2 with the screw 19 to prevent the handle 3 from being detached, and at the same time, the whole is integrated into a waterproof structure. The handle 3 has an opening 51 at which the drag 51 and the knob 58 project, but the other part is sealed, and only the microswitch 52 and the volume 54 are accommodated. There is an internal space that is kept airtight. Although the handle 3 is airtight, a drain hole may be formed in the lower portion of the handle 3 in order to discharge water generated due to a temperature difference or water entering through a narrow gap.

In the megaphone configured as described above, the first embodiment has a structure that is provided with a hand-driven generator 60 having the same size and the same size as the battery case 4.
FIG. 8 shows the hand-driven generator 60 of the first embodiment. In the first embodiment, the outer shape of the generator case 40 is substantially the same shape and the same size as the battery case 4, and the DC generator 61, the flywheel 62, and the gears are formed inside the generator case 40. A hand-driven generator 60 including 63, a handle shaft 64, a rotary handle 65, a charging circuit 66, and a storage battery 67 is housed. The generator case 40 includes a battery case lower 44 and includes a plus side terminal and a minus side terminal.

As is well known, the DC generator 61 is composed of a ring-shaped magnet and a rotor wound with a coil disposed in the center thereof. By rotating the rotary handle 65, the rotor rotates in the ring-shaped magnet, and the coil A current is induced to generate power output.
The flywheel 62 stabilizes the rotational speed of the rotary handle 65 and plays a role of stabilizing the power generation output. The gear 63 increases the number of rotations of the rotary handle 65 and increases the rotation of the rotor to increase the power generation output.
The storage battery 67 uses a secondary battery, a large capacity capacitor, or an electric double layer capacitor that is chargeable / dischargeable, such as a lithium ion battery, that is lightweight, small, and large capacity. The storage battery 67 is preferably housed in the generator case 40 as shown in FIG. 8, but if it cannot be housed in the generator case 40, it may be housed in the handle 3 and connected by a connection cord. In this case, the storage battery 67 may be stored separately in the generator case 40 and the handle 3 and electrically connected.
In the first embodiment, since the generator 60 is stored in the generator case 40 by hand, when the generator case 40 is attached instead of the battery case 4, the output of the generator is the positive side terminal and the negative side of the battery case. It is connected to the megaphone power supply circuit via the terminal.

  FIG. 9 shows a charging circuit 66, and the output of the hand-driven generator 60 includes a secondary battery such as a lithium ion battery, a large capacity capacitor or an electric double layer capacitor via a diode 71, and a voltage detector 72. Connected to. The voltage detector 72 is formed of a resistor, for example, and the voltage between the terminals of the resistor is detected by a switch circuit 73 formed of a transistor. The switch circuit 73 is turned on when the voltage between the terminals of the voltage detector 72 becomes a predetermined value or more, and the output terminal of the hand-driven generator 60 is short-circuited. Accordingly, when the storage battery 67 is charged with a voltage equal to or higher than a predetermined value by the hand generator 60, the output voltage of the voltage detector 72 is increased, whereby the switch circuit 73 is turned on and a reverse current flows through the rotor coil. The load on the generator 60 is increased. For this reason, the rotation of the rotary handle 65 becomes heavy and informs the user that the charging is completed.

  FIG. 10 shows another example of the charging circuit 66. A light emitting diode 74 is connected to the switch circuit 73, and the light emitting diode 74 is attached to the surface of the megaphone. In the charging circuit shown in FIG. 10, when the storage battery 67 is charged with a voltage equal to or higher than a predetermined value by the hand-driven generator 60, the switch circuit 73 is turned on and the light emitting diode 74 is lit to complete the charging to the user. To inform.

Since the megaphone of the first embodiment is configured as described above, when the battery case 4 is attached to the megaphone, the megaphone is used with the battery as a power source if the battery capacity stored in the battery case 4 is sufficient. can do. Further, when the hand-powered generator 60 is attached to the megaphone instead of the battery case 4, if the battery 67 is sufficiently charged by the hand-powered generator 60, the megaphone can be used with the battery 67 as a power source. When the battery capacity of the storage battery 67 is reduced, the rotating handle 65 of the power generator 60 is turned to charge the storage battery 67. If the charging voltage becomes sufficient, the megaphone can be used again.
In the first embodiment, the rotary handle 65 of the hand-driven generator 60 is provided behind the megaphone, but the rotary handle 65 may be provided on the side surface of the megaphone. In the case of a structure in which the rotation handle 65 of the hand-driven generator is provided on the side surface of the megaphone, the megaphone can be used while generating power by turning the rotation handle 65.
The rotary handle 65 shown in FIG. 8 is a manual rotary type, but the rotary handle 65 can be replaced with a configuration that can generate power by pulling a string wound around the rotary shaft of the generator 60. Alternatively, a structure may be provided in which a pendulum is provided, the pendulum is moved by vibration or swinging of the megaphone, and the rotation shaft of the generator 60 is rotated by the movement.

(Second Embodiment)
FIG. 11 shows the second embodiment, and the hand-driven generator 60 is housed in the rear center portion of the megaphone body 2 in place of the battery case 4. Therefore, in the second embodiment, there is no battery case, and the hand-driven generator 61 cannot be removed.
As in the first embodiment, the hand-driven generator 60 of the second embodiment includes a DC generator 61, a flywheel 62, a gear 63, a handle shaft 64, a rotary handle 65, a charging circuit 66, A storage battery 67 is used. In the case of this embodiment, each component of the generator may be arbitrarily distributed inside the megaphone body without being limited by the shape of the battery case 4. Also in the second embodiment, the storage battery 67 is preferably built in the hand-driven generator 60, but may be stored in the megaphone body 2 or the handle 3, or may be stored separately. Absent.
Other configurations are the same as those of the first embodiment.

The side view which shows the external appearance of the megaphone of 1st Embodiment is shown. A sectional view of a megaphone of a 1st embodiment is shown. The exploded sectional view of the horn mouse and megaphone body of a 1st embodiment is shown. The rear view of the megaphone of 1st Embodiment is shown. The exploded sectional view of the battery case of a 1st embodiment is shown. The rear view of the megaphone of 1st Embodiment is shown. The exploded sectional view of the handle part of a 1st embodiment is shown. The block diagram of the manual generator of 1st Embodiment is shown. The charging circuit figure of 1st Embodiment is shown. The another charging circuit diagram of 1st Embodiment is shown. Sectional drawing of the megaphone of 2nd Embodiment is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Horn mouse 2 Megaphone body 3 Handle 4 Battery case 17 Reflector 18 Reflector 35 Battery case storage part 40 Generator case 60 Manual generator 61 DC generator 65 Rotating handle 67 Storage battery

Claims (4)

A megaphone characterized by storing a generator inside the main body of the megaphone. A megaphone that consists of a horn mouse, a megaphone body, and a handle. The generator is housed in the megaphone body and a rotating handle for the generator is provided on the rear surface of the megaphone body. A megaphone consisting of a horn mouse, a megaphone body, and a handle. The generator is housed in the megaphone body, and a rotating handle of the generator is provided on the side of the megaphone body. A megaphone comprising a horn mouse, a megaphone body, and a handle, comprising a battery case for storing a battery, and a generator formed in substantially the same shape as the battery case, so as to be exchangeable for the megaphone body.