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JPH089482

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPH089482
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
main body of a hand-held microphone and a method of manufacturing the same.
[0002]
2. Description of the Related Art Conventionally, a hand-held microphone converts sound into an
electrical signal inside the upper end of a cylindrical main body having an inverted conical shape
whose diameter gradually decreases in the direction from the upper end to the lower end so as to
be easy to carry. The converter has a converter with an output terminal inside the lower end that
outputs the electric signal of the converter to the outside, and a spherical shape in which a
moisture absorbing sheet such as sponge is stretched on the inner surface of the mesh cap at the
upper end. A cap is screwed and connected, and a connection mechanism for connecting a plug
provided at the tip of a cable connected to the output terminal to supply an electric signal to the
acoustic device is provided on the inner periphery of the lower end, the main body Is
manufactured exclusively from aluminum die-cast moldings or brass pipe shells, and its outer
periphery is painted, plated with gold or chrome, or coated with an oxide film to obtain
decorativeness and commercial properties. Finishing is performed.
[0003]
SUMMARY OF THE INVENTION However, according to the above-described conventional
structure, since finishing is required after forming by aluminum die casting or after cutting of a
brass pipe, the process requires a lot of work. Not only that, especially when the main body is a
brass pipe bowl, it has a wall thickness with an outer diameter corresponding to the outer
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diameter at the upper end with the largest outer diameter and an inner diameter corresponding
to the inner diameter at the lower end with the smallest inner diameter. As it must be finished
into an inverted conical body using thick brass pipes, its machining is troublesome and waste of
material is also expensive, and as is well known, the hand-held microphone is an acoustic device.
The main body also touches the hands of many people because it is used by many people in
many places including the banquet and the like by the spread, the outer peripheral surface is by
hand or sweat etc It is easy to be damaged and damaged, so the main body becomes strongly
corroded in a short period of time, and the appearance is considerably damaged, and even if the
cap or the converter for converting sound into electric signal is normal, the microphone itself is
replaced There was a disadvantage of being forced to
[0004]
Therefore, in order to solve the above-mentioned disadvantages of the prior art, the present
invention is made of a metal pipe having excellent corrosion resistance, such as stainless steel or
titanium, in the direction from the upper end to the lower end. Lower auxiliary support provided
with an external thread for screwing and connecting a cap to the outer periphery of the upper
end portion of an inverted conical cylindrical body with a gradually smaller diameter, and a
connection mechanism for connecting a plug or an end piece to the inner periphery of the lower
end. The ring is fixed, and the switch mounting portion is provided on the side surface of the
cylinder. In the above, when the cap is screwed and connected by an external screw, the upper
end of the cylinder is An upper auxiliary ring having an inner screw for screwing a cap is fixed to
the inner periphery of the part.
[0005]
Also, as a manufacturing method, a cylindrical body made of a metal pipe excellent in corrosion
resistance such as stainless steel or titanium is drawn in reverse and / or expanded, and so it has
an inverted conical shape such that its diameter gradually decreases from the upper end to the
lower end. The lower auxiliary ring consisting of a metal cylinder provided with a connection
mechanism for connecting the plug is brazed to the outer periphery of the upper end with an
external screw for screwing and connecting the cap. It is characterized in that it is fixed, and
further, a switch mounting portion is provided on the side surface of the cylindrical body, and in
this manufacturing method, when the cap is screwed and connected by an external screw, An
upper auxiliary ring made of a metal cylinder is fixed by brazing to the inner periphery of the
upper end portion, and then an inner screw for screwing a cap is provided on the inner
peripheral surface.
[0006]
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2
In the above-described structure, the plug is provided with a locking mechanism in which the
claw piece protrudes from the outer peripheral surface in a normal state, and the claw piece is
recessed from the outer peripheral surface when finger pressure operation is performed, and a
positioning ridge. When the connection mechanism comprises a locking hole for locking with the
hook of the locking mechanism provided in the plug and a slit engaged with the positioning
protrusion provided in the plug, in the case of this configuration, the cylinder Before the lower
auxiliary ring is fixed by brazing to the inner periphery of the lower end of the body, the lower
auxiliary ring is provided with a connection mechanism with the plug in advance, and the
connection mechanism has an external piece with an external thread for connection on the outer
periphery When the lower auxiliary ring is fixed by brazing when the inner screw is formed by
screwing, an inner screw for screwing and connecting the end pieces is provided on the inner
peripheral surface of the lower auxiliary ring.
Furthermore, in the above, preferably, the auxiliary ring is made of the same metal pipe as the
cylinder.
[0007]
In operation, as in the prior art, the upper end of the main body has a conversion unit for
converting sound into an electric signal, and the lower end has an output terminal unit for
outputting an electric signal from the conversion unit. Further, the ON / OFF switch is attached to
the switch mounting portion, and the cap is screwed to the upper end of the main body, and the
plug or the end piece is connected to the lower end of the main body.
[0008]
Embodiments of the present invention will be described in detail with reference to the drawings.
Fig. 1 attaches the conversion unit 2 for converting sound into an electric signal inside the upper
end of the main body 1 in the present application, and the output terminal unit 3 for outputting
the electric signal of the conversion unit to the outside inside the lower end. A hand holding
member A is formed by screwing and connecting a lower portion of a spherical cap 4 in which a
hygroscopic sheet made of sponge or the like is stretched on the inner surface of a mesh cap at
the upper end of 1 and connected to the lower end portion of the hand holding member A Fig. 2
shows a general view of a hand-held microphone in a state where it is separated from the plug B,
a switch 5 for switching between ON and OFF by finger pressure operation is attached to the side
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of the main body 1, and the plug B has a tip Has a connecting portion 6 fitted with the lower end
portion of the main body 1 and having a female terminal connected to the male terminal 3a of
the output terminal portion 3 and at the position of the connecting portion 6 , As is known, in the
normal state from the outer circumferential surface 7 protrudes, the locking mechanism 8
retracts from the outer peripheral surface of the claw piece 7 by finger pressure operation, and a
protrusion 9 for positioning to regulate the direction of connection terminals are provided.
In the figure, reference numeral 10 denotes a covering which is fitted to the upper end portion of
the main body 1 and covers a screwing portion between the main portion 1 and the cap 4.
[0009]
The main body 1 is formed into a reverse conical shape by drawing processing or expansion
processing so that the diameter of the cylindrical body 11 made of a stainless steel pipe
gradually decreases in the direction from the upper end to the lower end.
Generally in metal pipes, compared with drawing to reduce the diameter, expansion processing to
enlarge the diameter is easier, so in this example the overall length is 104 mm, the upper end
outer diameter is 32, 5 mm, the lower end When the outer diameter is 21 mm and the thickness
of the cylinder 11 is 1,5 mm, a stainless steel pipe with an outer diameter of 25 mm and a
thickness of 1,5 mm is used. 7,5 mm toward the upper end centering on the outer diameter
dimension The drawing process and the expansion process are used in combination so as to
enlarge the outer diameter and reduce the outer diameter by 4 mm in the lower end direction.
[0010]
An outer screw 12 is provided on the outer periphery of the upper end of the cylindrical body 11
thus formed in an inverted conical shape, and is screwed to an inner screw provided on the inner
peripheral surface of the lower end portion of the cap 4 by cutting.
A lower auxiliary ring 15 is attached to the inner periphery of the lower end portion of the
cylindrical body 11. That is, as is well known, the plug B is standardized, and the lower auxiliary
ring 15 is used to enable the use of the standardized plug B, and the lower auxiliary ring 15 has
an outer diameter of the above-mentioned It is made of a stainless steel pipe which is fitted to the
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inner peripheral surface of the lower end portion of the cylindrical body 11 and whose inner
diameter is fitted to the outer diameter of the connection portion 6 of the plug B, as shown in
FIG. A locking hole 16 for locking with the claw piece 7 and a longitudinal slit 17 engaged with
the positioning ridge 9 are provided, and an annular rib 18 bent to a slightly smaller diameter is
provided at the upper end thereof.
[0011]
The lower auxiliary ring 15 thus constructed is fitted on the inner periphery of the lower end
portion of the cylindrical body 11, and at the upper end joint portion, copper brazing is
performed to fix them. Next, a set screw that penetrates the mounting portion 21 of the
changeover switch 5 consisting of the mounting hole 19 and the operation hole 20 sideways
near the top of the side surface of the cylinder 11 and sideways near the lower end A mounting
hole 22 is provided. In this example, the height dimension portion 11a necessary for providing at
least the external screw 12 on the upper portion of the cylinder 11 and the height dimension
portion 11b necessary for fitting the auxiliary ring 15 are formed vertically. And the outer
peripheral surface of the body 1 is polished by the pub, thereby banding the gloss.
[0012]
Although the above embodiment shows the case where the external screw 12 is provided on the
outer periphery of the upper end portion of the cylindrical body 11, the external screw is
provided on the outer periphery of the lower end portion of the cap 4 of the microphone for
handheld. In the case where the upper end portion 1 is screwed to the upper end portion, a
cylindrical upper auxiliary ring 25 formed by pressing a stainless steel pipe or a stainless steel
plate is attached to the inner peripheral portion of the upper end portion of the cylindrical body
11 made of a stainless steel pipe. That is, the use of the upper auxiliary ring 25 can be applied to
any of caps having different connection bores, and the outer diameter of the upper auxiliary ring
25 matches the inner diameter of the upper end of the cylindrical body 11. The upper auxiliary
ring 25 is fitted to the inner periphery of the cylindrical body 11 and fixed by copper brazing a.
Next, in this state, an inner screw 26 is applied to the inner peripheral surface of the upper
auxiliary ring 25 by cutting. Also in this configuration, the lower auxiliary ring 15 is fixed to the
inner periphery of the lower end portion of the cylindrical body 11 by copper brazing a, as
shown in FIG.
[0013]
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5
Further, in the above configuration, as shown in FIG. 9, the hand-held microphone is made of
rubber or the like provided with a screwing shaft 35 having a screw on the outer periphery at the
upper end, and an oscillation code or transmission of an audio signal at the center. In the case of
screwing and connecting the end piece C penetrating the lead-out hole 36 for inserting the cord
to the lower end portion of the main body 1, the stainless steel pipe or stainless plate is pressed
instead of the lower auxiliary ring 15 After the second cylindrical lower auxiliary ring 30 is fixed
by copper brazing, as shown in FIG. 8, an inner screw 31 is provided by cutting, and the inner
screw 31 is provided with an end as shown by a phantom line in FIG. Connect the piece C by
screwing. The end piece C is fixed by tightening a set screw in a screw hole 37 formed in the
screwing shaft 35 via the mounting hole 32.
[0014]
Of course, in the above embodiment, the cylindrical body 11 and the auxiliary rings 15, 25 and
30 may be made of titanium pipes, respectively.
[0015]
As described above, according to the present invention, since the metal pipe is excellent in
corrosion resistance, there is no fear that corrosion will occur even when the frequency of the
hand-held microphone is used, and the impact etc. Since there is no possibility of being damaged
by the action of an external force and there is no coating or plating layer on the outer surface,
the fouling can be easily removed, the durability can be enhanced, and the economic cost can be
reduced.
Furthermore, according to the present application, the use of the upper auxiliary ring can be
effectively applied to the connection of caps of different types with different connection
diameters, and the use of the lower auxiliary ring is also effective in the connection of
standardized plugs. It has advantages such as being applicable.
[0016]
Brief description of the drawings
[0017]
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Fig. 1 Overall plan view of the hand-held microphone shown partially cut away
[0018]
Fig. 2 Partially cut side view of the cylinder
[0019]
Fig. 3 Partially cut side view of lower auxiliary ring
[0020]
Figure 4 Partially cut side view of the main body
[0021]
Fig. 5 Partially cut side view showing another embodiment of the cylinder
[0022]
Fig. 6 Partially cut side view of upper auxiliary ring
[0023]
Fig. 7 Partially cut side view showing another embodiment of the main body
[0024]
FIG. 8 is a partially cut side view showing still another embodiment of the main body
[0025]
Fig. 9 Half-section view of the end piece
[0026]
Explanation of sign
[0027]
11 cylindrical body 12, 31 external screw 15, 30 lower auxiliary ring 16 locking hole 17 slit 21
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changeover switch mounting portion 25 upper auxiliary ring 26 inner screw A hand-held
member B plug C end piece
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