JPS5629544

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DESCRIPTION JPS5629544
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a rear longitudinal side view of a wireless
microphone according to the present invention, and FIG. 2 is a schematic bottom view of a
printed circuit board used for the same microphone. DESCRIPTION OF SYMBOLS 1 ... rear case
(enclosure), 2 ... middle case (enclosure), 5 ... insulating frame 4.6 ... printed circuit board, 7 ...
antenna terminal metal fitting, 8, 9: Battery contact fitting, 21: printed circuit board mounting
surface, 22: antenna terminal fitting mounting portion, 23.24: battery contact fitting mounting
portion, 22a, 23a, 24a: wiring connection leg.
The present invention relates to a wireless microphone, and more particularly to an improvement
in the part connecting its power supply battery and transmitting antenna to a transmitting
circuit. In conventional wireless microphones, it has been common practice to use a conductor
such as a sheathed conductor for transmitting a battery 21) a source battery and a transmitting
antenna, and for connecting + l) to a circuit. In the recent downsized and lightweight wireless
microphones, mount the two contact fittings and antenna terminal fittings for the positive and
negative electrodes of the battery in a narrow case, and connect the five valleys to the
transmission circuit with three wires. In addition, the structure is complicated and there is a
problem that the assembly operation requires a considerable amount of time and effort. This
invention is intended to solve the above problems. This invention will be described based on an
embodiment shown in the drawings. The wireless microphone of the embodiment is a rear case
1, a middle case 2, a front case (not shown). ) Is a type having an elongated envelope in which
three cylindrical cases are screwed together, the battery chamber 315 is provided at the rear of
the inside, the transmission circuit unit 4 is provided at the middle portion, A microphone unit is
provided at the front. In the figure, 5 is an insulating frame, 6 is a printed circuit board, 7 is an
antenna terminal fitting, and 8.9 is a battery contact fitting. 21) Insulation frame 5 is attached to
middle case 2 (2)! Front cover supports the microphone unit at the front, the transmission circuit
board 10 is attached by a screw 11 at the middle part, and the printed board 6, antenna terminal
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at the rear Three golds and a battery contact 8.9 are attached. The printed circuit board 6 has a
pattern as shown in FIG. 2, and the ground wiring 12, the power supply w and 13, and the
transmission antenna wiring 14 are printed. 15.16.17 are wire connection leg insertion notches
or holes for each of the antenna terminal clamp and battery contact bracket 8.91 O, and
18.19.20 are holes for connector attachment. The printed circuit board 6 is traced with the
insulating side in contact with a printed circuit board mounting surface 21 provided on the
opposite side of the sword that houses the battery at the rear of the insulating frame 5. As shown
in FIG. 1, the antenna terminal fitting 7 and the battery contact fitting 8.9 are disposed at the
antenna terminal fitting mounting portion 22 and the battery contact fitting mounting portion
23. 24 formed on the insulating frame 5, respectively. ', The wiring connection legs 22a, 23a,...
24a are provided in the insulating frame 5 2 (2) insertion holes 25.26. The connection leg and
the corresponding wiring 12 for power, wiring 13 for power supply, and wiring 14 for
transmitting antenna are soldered so as to protrude slightly through the holes 16.17.
The metal fitting 7.8.59 and the printed circuit board 6 are coupled and fixed to the insulating
frame 5 by this soldering. In the figure, 28 is an antenna cord, and 29a and 29b are a pair of 3pin connectors. The connector 298 is attached to the printed circuit board 6, and the connector
29 b is attached to the transmitter 10 circuit board 10, and both are coupled when the
transmitter circuit board 10 is attached to the frame 5. The wiring of the wireless microphone
and power supply and transmission antenna of the above-described structure is simply replaced
with the conventional flexible conductive wire 15 to make a printed wiring, and by soldering the
printed circuit board 6 and the metal fitting '7.8.9. Each attachment to the insulating frame 5 is
also performed. Therefore, the assembly work of this part was greatly simplified and the work
efficiency improved. The number of parts is small and orderly compared with the configuration
using the conventional flexible lead (4), and there is no fear of disconnection because there is no
flexible lead portion at the time of battery replacement.
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