JPS5843340Y2 - Structure of electric megaphone - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to the structure of an electric megaphone.

A foldable horn speaker in an electric megaphone has an inner horn tube, an outer tube, and a rearward-opening middle tube attached to a throat device.

A drive unit is connected to the back.

Conventionally, when attaching a middle tube to a throat tool, a mounting leg is provided around the open end of the middle tube, and an axial threaded pipe type is threaded onto this leg, and a threaded hole is drilled in the throat tool.

Align the screw receiving hole and the screw hole and screw the mounting leg from the back of the throat tool, or provide matching retaining pieces projecting around both the open end of the middle cylinder and the front of the throat tool, These engaging pieces are fixed by screwing from the sides.

However, in such a mounting structure [.

Because it is difficult to align when screwing.

For example, when connecting with three screws, the position of other screw holes may be shifted depending on the tightening of the screw in the first hole, resulting in poor work efficiency in one assembly.

Further, even when a speaker is connected to a body case housing an amplifier or the like, work efficiency is poor because there is no sufficient positioning or rotation prevention for the connection screw.

The problem is that it is difficult to make a reliable connection.

In particular, in the case of electric megaphones, the above-mentioned problem has become more serious because the speaker and the body case must be screwed together within the body case so that the coupling screws are not visible.

In view of this, the present invention integrates the inner cylinder and the middle cylinder,
Is there an opening end of the middle tube for the throat tool? ) A fitting hole is provided at the position corresponding to the mounting leg, and a positioning pin is provided on the back of the throat tool that protrudes toward the rear, allowing the mounting leg to fit into the fitting hole and the positioning pin to position the body case. By fitting into the hole, the inner tube, the throat tool, and the body case can be easily screwed together, thereby improving workability when assembling the electric megaphone.

The configuration of one embodiment of the present invention will be described below with reference to the drawings.

The electric megaphone 1 is equipped with a folded horn speaker 2.

The horn speaker 2 has an inner cylinder 4 on the front side of a throat tool 3, as shown in FIG.

The middle cylinder 5 opened toward the rear has a diaphragm on the back.

A drive unit 6 including an equalizer and a magnetic circuit is coupled, and an outer cylinder 7 is further attached.

The inner cylinder 4 and the middle cylinder 5 are integrally formed of synthetic resin.

Attachment legs 8 are protruded rearward at three locations around the open end of the middle cylinder 5, and a threaded tube type 9 in the axial direction is threaded on the attachment legs.

On the other hand, the throat tool 3 is formed with a concave fitting hole 10 that corresponds to and fits into the mounting leg 8, and a screw hole into which a mounting screw 30 is inserted is bored in the center of the fitting hole.

Furthermore, positioning pins 11 are protruded from three locations on the periphery of the back of the throat tool 3, and the body case 12 and the
A body case screw hole 13 and a drive unit screw hole 14 are provided for screwing the drive unit 6.

They are located in three locations.

The fitting hole 10 is formed in a concave shape and is provided with a step surface in the middle for abutting the mounting leg 8, but this may be a through hole without a step surface.

In that case, a washer having a larger diameter than the through hole is applied to the mounting screw 30.

The body case 12 has an amplifier accommodating part 18 and a battery accommodating part 19 formed by a partition wall 17 for accommodating an amplifier 15 and a battery 16, and a battery contact plate 20 and a microphone hanger 21 are provided at the rear of the body case. The lid body 22 is attached, the C handle 23 is attached to the upper part, and the stand 2 is attached to the lower part.
4 is screwed, and a microphone 25 is connected to the amplifier 15 with a curl cord 26.

Further, a band 27 is extended between the outer cylinder 7 and the lid body 22.

and. To the outside of the body case 12 @ 7 7 lunge 29.

A positioning hole is provided at a position corresponding to the positioning pin 11 of the throat tool 3.

To assemble the above-mentioned parts, the mounting legs 8 of the inner tube 5 are fitted into the fitting holes 10 of the throat tool 3, and both are fixed by screwing from the back of the throat tool 3.

The positioning pin 11 protruding from the back of the throat tool 3 is attached to the seal 28a, and the flange 29 of the outer cylinder 7 is attached to the seal 28b.
, body case 12 are inserted in this order, and the outer cylinder 7 and body case 12 are fixed to the throat tool 3 by aligning the respective screw holes and tightening the screws.

In the above embodiment, the middle cylinder 5 is screwed to the throat tool 3 by providing a threaded tube type 9 on the mounting leg 8.

In some cases, the mounting leg 8 is provided with a thread at its distal end, passes through the fitting hole 10, projects from the front surface to the back surface of the throat tool 3, and then tightens a nut thereon.

Also. The threaded pipe type 9 may be formed by threading the mounting leg 8, or may be formed by embedding a female threaded fitting.

As mentioned above, in this invention, when the mounting leg of the middle cylinder is fitted into the fitting hole of the throat tool, the screw holes of both will match, and there will be no misalignment when tightening the screw. This makes it easy to use, and there is a positioning pin protruding from the back of the throat tool.

This positioning pin allows for alignment when screwing to the body case.

Similarly, screw tightening work becomes easier, and since the inner tube and middle tube are integrated, the inner tube can be assembled to the throat tool along with the inner reinforcing rod, which has the excellent effect of improving productivity. .

[Brief explanation of drawings]

The drawings illustrate an embodiment of the present invention, and FIG. 1 is an exploded perspective view of an electric megaphone, FIG. 2 is a sectional view thereof, FIG. 3 is a sectional view taken along the line ■-■ in FIG. 2, and FIG. FIG. 5 is a perspective view showing the middle tube of the horn and the throat tool, and FIG. 5 is a rear view of the throat tool. 1...Electric megaphone, 2...Horn speaker. 3...Throat tool, 4...Inner cylinder, 5.
...Middle cylinder, 6...1 Drive unit, 7.
...Outer tube, 8...Mounting leg. 9...Threaded pipe type, 10...Fitting hole, 1
1...Positioning pin.

Claims (1)

[Claims for Utility Model Registration] A drive unit, a combined throat device, a folded horn speaker with an inner tube and an outer tube each opening toward the front, and a middle tube opening toward the rear, and an amplifier, etc. In an electric megaphone that is combined with a housed body case, the inner tube and the middle tube are integrally molded, and mounting legs are provided around the open end of the middle tube to protrude rearward, while the throat tool has A fitting hole is formed at a position corresponding to the mounting leg. On the back of the throat tool, a positioning pin protrudes rearward, while a positioning hole is formed in the body case at a position corresponding to the positioning pin, and the inner cylinder and middle cylinder are fitted with fitting holes that serve as mounting legs. A structure of an electric megaphone characterized in that it is connected to a throat tool by fitting and screwing, and the throat tool and the body case are screwed to each other by fitting positioning pins into positioning holes.