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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a bottom view of the adapter mounted on the
bottom of the case of the stereo device body, FIG. 2 is a perspective view showing the adapter
and the socket partially cut away, and FIG. FIG. 6 is an enlarged cross-sectional view taken along
the line 1-- in FIG. 2 · · · · · · · · · · · · · · · · · · · · · stereo amplifier equipment case, 5 · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·. ..... Terminal board. 1 1 1 開 51-28701 (2) ÷ 2
Figure 3 3-port -2-
DETAILED DESCRIPTION OF THE INVENTION A non-inventive arrangement relates to a four
channel stereo amplifier fitted with a packaged adapter. In 4-channel stereo, there are various
stereo systems such as SQ and CD-4 etc.) Furthermore, the decoder of SQ system has a front-back
logic circuit and a full-loss circuit [Saito (1 There are many kinds of circuit systems in other
stereo system decoders as well. As described above, there are a wide variety of decoders in
various stereo systems, and conventionally, it is necessary for the listener to select a desired
decoder and secure a place for arranging the decoder in order to connect the stereo amplifier
device body and the decoder by a code. I couldn't help it. Moreover, in the 4-channel stereo 7
node which incorporated the stereo system of each building, it was not possible to replace it with
a high-class decoder, and it was expensive because the listener used it and incorporated the
circuit. . The uninvention solves the above-mentioned problems. A pancage-type adapter can be
removably attached to the outer surface of the 4-channel stereo amplifier device body case, and
black can be converted to a decoder of the circuit system desired by the listener. It is an object of
the present invention to provide a four-channel stereo amplifier which can easily replace a
vanochuge-type adapter in which the decoders of the stereo system and various circuit systems
are internally provided. An embodiment of the present invention will be described in detail with
reference to the attached drawings. (2) l is a stereo device body, 2 is a device body case. A recess
3 is provided on the bottom surface 2 a of the profit / loss body case 2, and a hole 6 is formed in
a part of the recess peripheral wall 4, and the socket 5 is fitted in the liquid hole 6. In the socket
5, the shaft hole 9 is bored in the raised wall 8 of the fixing bracket 7, and the protrusion 11
drilled in the side wall IQa of the rotating plate 10 is pivoted in the shaft hole 9 Is fixed to the
fixing bracket 7. Further, a hole 12 is bored in the central wall 10b of the rotating plate IO to fit
the connector 13. The socket 5 is disposed in the hole 6 formed in the recess 3 of the device
body case 2 and the fixing fitting 7 of the socket 5 is fixed to the device body case by the screw
14. Thus, various decoder circuits 15, that is, a CD-4 decoder (demonstrator), an SQ decoder
having a front-back logic circuit, an SQ decoder having a full logic circuit, and a circuit of each
RM (regular matrix) type decoder. The terminal plate 18 projects from the case 17 of the adapter
16 in which each of the interiors is mounted, and the terminal plate 18 is fitted onto the
connector 13 of the socket 5 like a two-point chain shown in FIG. The adapter 16 is pivoted and
fitted to the four parts 3 of the device case 2 in a solid line as indicated by the solid line, and a
projection 17a protruding from the case 16 of the adapter 16 is fixed to the device case 2 with a
screw 19 .
Thus, the adapter 16 can be replaced with each of the adapters 16 in which the various decoder
circuits 15 are mounted. In the present invention, a protrusion 17a provided on the case 16 of
the adapter 16 and a protrusion are provided on the device body case 2. The protrusion is
engaged with the protrusion to fit the adapter 16 in the recess 3. It is also good. Furthermore, the
adapter may have two or more decoders installed in the adapter, and the adapter may be
provided with a switch so that the valley decoder can be switched. In the present invention, as
described above, the adapter can be easily installed and replaced outward of the device body
case, and the tastes of the four parties can be satisfied by replacing the adapter equipped with
the stereo decoder desired by the listener. As well as being able to do so, it is useful for use
without increasing the location of the equipment.
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