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JPH05176386

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DESCRIPTION JPH05176386
[0001]
FIELD OF THE INVENTION The present invention relates to microphones, and more particularly
to microphone grips.
[0002]
2. Description of the Related Art In general, as a dynamic microphone, a connector type in which
a microphone main body can be removed from a shield by a canon connector and a direct
connection type in which a microphone main body and a shield are nonremovably attached are
known. There is. The connector type is usually adopted for high-performance high-grade
microphones, while the direct connection type is adopted for low-cost microphones.
[0003]
FIGS. 9A and 9B show a connector type microphone in a plan view and a sectional view. The
microphone body 1 has a sound pickup unit 2 in which a sound pickup mechanism 2a composed
of a diaphragm, a voice coil, a magnet, etc. is incorporated, a grip 3 for a user to grip and a lower
end of the grip 3 It is comprised from the connector junction part 4 attached. Further, an on / off
switch 3a is attached to the grip portion 3, for example. Reference numeral 5 denotes a lead wire
connecting between the sound collection mechanism 2a, the on / off switch 3a, and the terminal
4a of the connector joint 4.
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[0004]
A connector pin 4 b is provided below the connector joint portion 4 so as to be joined to a canon
connector 6 provided at one end of the shield 7. Further, a screw hole 3b is provided in the
vicinity of the lower end portion of the grip portion 3. The connector joint portion 4 is formed by
screwing the screw B to the connector joint portion 4 through the screw hole 3b. It is made to be
fixed to the lower end.
[0005]
The grip 3 is manufactured by a die-cast manufacturing method using a material such as zinc or
aluminum. By using zinc and aluminum, it is possible to form the grip portion 3 having a good
appearance and a sense of weight (i.e., high quality).
[0006]
On the other hand, FIGS. 10 (a) and 10 (b) show a direct connection type microphone in a plan
view and a sectional view. Like the connector type, the microphone body 10 has a sound pickup
unit 11 in which a sound pickup mechanism 11a composed of a diaphragm, a voice coil, a
magnet, etc. is incorporated, and a grip unit 12 to which an on / off switch 12a is attached. Have.
[0007]
A locking portion 12b is formed on the inner peripheral surface of the lower end of the grip 12,
and the bushing 13 pressed into the grip 12 from below is locked and fixed by the locking
portion 12b.
[0008]
Reference numeral 14 denotes a lead wire for connecting between the sound collection
mechanism 11a and the on / off switch 12a. The terminal of the on / off switch 12a is directly
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connected to the shield 15 and led to the outside.
That is, the shield portion 15 is connected to the microphone body in a non-removable manner
via the bushing portion 13. In the case of such a direct connection type and the like, the grip
portion 12 is often, for example, resin-molded in consideration of cost reduction.
[0009]
By the way, in this way, in each type of microphone, each grip portion has different functions at
its lower end portion. That is, in the connector type, screw holes 3b are provided as shown in FIG.
9 and the attachment function of the connector joint portion 4 is provided. However, in the direct
connection type, as shown in FIG. It is made to be equipped with thirteen omission prevention
functions. For this reason, the grip portion can not be shared for each type of microphone,
resulting in a problem that production lines are wasted and manufacturing costs are increased.
[0010]
SUMMARY OF THE INVENTION The present invention has been made in view of the above
problems, and is for mounting a connector joint when forming a connector connection type
microphone near the lower end of the microphone grip. Both the mounting means used and the
retaining means used for retaining the bushing when the microphone is of the direct connection
type are provided.
[0011]
According to the above construction, as the microphone grip, the same molded product can be
used for both the connector type and the direct connection type microphones.
[0012]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the microphone
grip according to the present invention will be described below with reference to FIGS.
[0013]
1 (a) and 1 (b) show a microphone grip (hereinafter referred to as a grip portion) of the present
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embodiment in a plan view and a sectional view, and 20 is a grip portion main body formed
using, for example, an iron pipe material 21 is a switch hole for mounting the on / off switch
device, 22 is a screw hole provided in the vicinity of the lower end, and 23 is an engagement
provided on the inner peripheral surface in the vicinity of the lower end. It is a stop.
Reference numeral 24 denotes a thread groove for joining with the sound collecting mechanism.
[0014]
The grip portion 20 is formed, for example, by subjecting a pipe material to rolling, compression
pressing, and deformation.
This molding method will be described with reference to FIGS.
[0015]
First, as shown in FIG. 2, the iron pipe material P is cut into a predetermined length L
corresponding to the length of the grip portion 20.
Then, the cut iron pipe material Pc is sent to a rolling and compression pressing process.
[0016]
In this pressing step, as shown in FIGS. 3 (a) and 3 (b), the rolling mold K1 is first pressed into
the iron pipe material Pc, and the iron pipe material Pc is further pressed. A compression mold
K2 is fitted from the periphery. The iron pipe material Pc is deformed into the shape of the grip
20 as shown in FIG. 4 by the pressure applied by the rolling mold K1 and the compression mold
K2.
[0017]
After the basic shape of the grip portion 20 is formed as described above, the switch hole 21 for
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mounting the on / off switch as shown in FIG. 5 by press punching, and the screw hole for
mounting the connector portion 22 is provided, and further, thread rolling is performed to form
a thread groove 24 for joining with the sound collecting mechanism as shown in FIG.
[0018]
Thereafter, for example, from the upper side of the grip portion 20 to the lower side, the
cylindrical inner wall portion is scraped to form a raised portion at a predetermined portion, and
this is taken as the locking portion 23 shown in FIG. .
In addition, even if this latching | locking part 23 is not circumferential shape, it is good also as a
several nail | claw-like protrusion provided, for example by predetermined spacing in the
circumferential direction.
[0019]
As described above, when the grip portion 20 is formed into a predetermined shape in the steps
of FIGS. 2 to 6, finally, surface treatment such as polishing with a buff, plating treatment and
painting is performed to obtain a good appearance state. The manufacturing process of the grip
portion 20 is completed.
[0020]
By configuring the grip portion 20 in this manner, a connector type microphone as shown in
FIGS. 7A and 7B and a direct connection as shown in FIGS. 8A and 8B using the grip portion 20.
A type of microphone can be realized.
The same reference numerals as in FIGS. 9 and 10 denote the same parts in FIGS. 7 and 8, and a
description thereof will be omitted.
[0021]
That is, in the case of the connector type of FIG. 7, the connector joint 4 is inserted from the
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lower end side of the grip 20, and the connector joint 4 is fixed by the screw B inserted through
the screw hole 22. . Further, the on / off switch 3 a is attached via the switch hole 21 of the grip
20, and the sound collecting mechanism 2 a is attached by the screw groove 24, and is disposed
inside the sound collecting unit 2.
[0022]
Of course, the lead wire 5 communicates with the sound collection mechanism 2a, the on / off
switch 3a, and the terminal 4a of the connector joint 4. Further, the connector joint portion 4 is
joined to the cannon connector 6 provided at one end of the shield 7 by the connector pin 4b
provided at the lower side thereof.
[0023]
In the case of the direct connection type shown in FIG. 8, the on / off switch 12a is attached
through the switch hole 21 of the grip 20, and the sound collecting mechanism 11a is attached
by the screw groove 24 as in the connector type shown in FIG. It is disposed inside the sound
collection unit 2. Further, the sound collecting mechanism 11a and the on / off switch 12a are
connected by the lead wire 14, but the terminal of the on / off switch 12a is directly connected to
the shield 15 and led to the outside.
[0024]
The bushing 13 is press-fitted from the lower end side of the grip 20, and the bushing 13 is
locked and fixed by a locking portion 23 provided on the inner peripheral surface of the grip 20
so that it does not fall off . The shield portion 15 is non-removably connected to the microphone
body via the bushing portion 13. In this case, since the screw hole 22 has no particular function,
the short screw BD is screwed into the screw hole 22 for the purpose of closing the screw hole
22.
[0025]
As described above, in the present embodiment, in the vicinity of the lower end portion of the
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grip portion 20, the screw hole 22 used for attaching the connector joint portion when the
microphone is of the connector connection type is provided. The grip portion 20 of the present
embodiment can be applied to either the connector type or the direct connection type
microphone because the locking portion 23 used to prevent the bushing portion from coming off
at the time of mounting is provided. . That is, since the grip part 20 which is the same molded
article can be shared, the manufacturing process of the grip part 20 can be streamlined, and the
cost as a microphone can be reduced.
[0026]
In the present invention, the attachment means of the connector joint portion provided in the
grip portion and the retaining means used for retaining the bushing portion are limited to the
form of the screw hole 22 and the locking portion 23. It is not something but various changes
are possible.
[0027]
In the present embodiment, the grip portion is formed by rolling and compression pressing using
an iron pipe material, but this brings about the following advantages.
[0028]
For example, although it is general to manufacture the grip portion by the die casting method,
naturally, in this case, there is a parting line of the mold, and a burr portion is generated in the
molded product corresponding to the parting line .
For this reason, after die-casting, before performing surface treatments such as polishing, plating
and painting, it is necessary to perform cutting with a lathe.
However, since this cutting process requires a long time, it has been a cause of lengthening of the
manufacturing process, complication, and cost increase.
[0029]
On the other hand, in the case of the present embodiment, since the pipe material is rolled and
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compressed to be deformed into a predetermined shape and the grip portion 20 is formed, no
burrs or the like are generated. Before the process is performed, a process requiring a long time
of adjusting the outer shape in the cutting process using a lathe is not necessary at all, thereby
promoting shortening of the process, simplification and cost reduction. Of course, by using the
iron pipe material Pc, since the grip portion 3 has a certain weight, it can be adopted as a grip
portion of a high-class microphone with a sense of weight. In addition, you may use not only an
iron pipe material but another metal pipe, such as an aluminum pipe, a brass pipe, etc.
[0030]
The grip portion may be formed into the shape of FIG. 1 using, for example, a resin (ABS resin or
the like). In this case, although the forming process of the grip portion is somewhat simplified, it
lacks a sense of weight and is not optimum as a microphone as a high-end model, but there is no
problem with a so-called inexpensive microphone.
[0031]
As described above, in the microphone grip according to the present invention, the mounting
means used for mounting the connector joint portion in the vicinity of the lower end portion as
the connector connection type microphone, and the direct connection type microphone In this
case, a retainer is used to prevent the bushing from coming off, and therefore, it can be adopted
for both the connector type and the direct connection type. That is, the microphone grip
according to the present invention can be shared by both types, and there is an effect that the
improvement of the manufacturing efficiency and the reduction of the manufacturing cost can be
remarkably promoted.
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