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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a conventional
speaker switching device, FIG. 2 is a schematic view of a device according to the present
invention, FIG. 3 is a connection diagram showing an example of the device, FIG. FIG. 5 is a
connection diagram showing another example of the device, and FIG. 5 is an external view
showing an example of a dial type changeover switch constituting the device. DESCRIPTION OF
SYMBOLS 1 ... Speaker, 2 ... Relay, 8 ... Dial-type changeover switch, 11 ... Stop switch, 12 ...
Switch for excitation. Fig. 1 1 93-the real open 51-136 141 (2) Fig 2 the Fig 1 3-the real open
51-136 141 (3) Fig 4 ii 4 9) 12 doo-3 1 1 ?6 ei -95-
[Detailed description of the invention] The present invention relates to a switching device for a
speaker which can be freely selected from among a large number of speakers when listening to
the speakers in an audio shop etc. It is intended to simplify and simplify the switching operation,
and to provide a system that does not impair the sound quality characteristics. As shown in FIG.
1, this type of conventional device is connected to each of a large number of 1-speakers a, a. The
desired speaker to be auditioned is operated by switching operation of. Therefore, as the number
of speakers a, a, ... increases, the number of changeover switches b, b ... also increases, so that the
switching operation panel C becomes large and the equipment cost also increases. In order to
facilitate the switching operation of the switches b, b, the board C must be set close to the hand,
but then the spiller a, a, ... and the switch b
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Not only that, then the speaker a.
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и has a drawback that
it impairs the sound quality characteristics of. The present invention is intended to solve such a
problem, and if this is described in detail based on the illustrated embodiment, it is desired to
select from among a large number of speakers (1) (11. {Circle around (1)} A dial-type switching
operation unit (4) consisting of a speaker (11x'x, Re-rel ~ (2+ (2) ...) and a dial-type switching unit
(3) It is. And the switching operation part (4) shown in FIG. 3 is one end (5) '(5)' of the relay (2)
(2)... ... connected to the positive electrode (6) of the power supply and the other end (5) 'I (5)' of
the same coil (5) (51. The stationary contacts (7), (7),... Of 2+... Are connected to the fixed
contacts (9, 9),. Then, by rotating the rotating contact piece ?O of the switch (8) in the direction
of the arrow shown by the dotted line, switching between the fixed contacts (9) (91, ...) can be
made freely, thereby making it possible to listen to the sample Between the contact piece ?Q
and the stop switch Q11 connected to the negative electrode (6) 'of the power supply so that the
relay (21 x f) can be selected. When the switch is turned on, the excitation current is made to
flow to the excitation coils (5), (5).
??????? The relay (21 (2+... Movable contact 1 1...) Is connected between the switch (2)
and the stop switch ??. Next, the one shown in FIG. 4 is the same as the one shown in FIG. 3,
but with the dial type changeover switch (8) having the number of positive contacts + 91 (91. )
(11 ........ twice as many speakers (1) (1). Connect the excitation switch (2) between the negative
electrode of the power supply (67K connection to the stop switch a and connect the excitation
coil (51 (5)) between the two switches Qll 4. but ... begging for connection is the same as that
shown in FIG. 3, a relay (2) (21 ----- stationary contact (7) (7) ----- an exciting coil (5 ) (5)... (5 units
(5F '..., Via the diode (6) q4. Connected to the factor contacts (9) (91 ...) of the dial selector switch
(8), and the other ends (51 '(5)' ... ... of the exciting coils (5) (51 ...) и 'I is connected to the positive
electrode (6) of the power supply by the switching operation of the I switch ?Q. Then, in order
to use the device shown in FIG. 3, the rotary contact piece Q1 of the dial type changeover switch
(8) is switched so as to connect to the relay (2) X to which the desired speaker (1) X is connected.
When the stop switch (1) Y is turned on, and then the excitation switch U 'and on -Jtt, the
excitation coil of the relay (2) X in which the excitation current from the power source is
connected to the rotating contact ? и 5) Flow to X. The core in the coil (5) x is thereby excited,
and the movable contact 03X of the relay (2) x is attracted to the stationary contact r7) X of the
relay (2) x, and then for excitation When the switch is turned off, the direct current is a closed
circuit of the positive electrode (6)-relay (2) X stationary contact (7)-same town moving contact q
3-stop water circuit (6)-negative electrode (6) ' Are connected to the relay (2) x by this Speakers
(1) X to operate. Next, another speaker (switch to ? n stop switch (if I ? is turned off, the above
open circuit is opened and the circuit is configured with relay (2) X1 speaker (1) X operation?
Then, the rotational contact piece ?Oh is turned to switch the connection between the fixed
contact R (9) (9). Then turn on the stop switch (b) and then switch on the excitation switch aB?
When it is turned on, a direct current from the power supply flows through the exciting coil (5) n
of the relay (2) n connected to the rotating contact piece (1 c I), thereby exciting the core of the
relay (5) n and moving The contact (d) n is connected to the stationary contact (7) n. After that, if
the excitation switch (2) is turned off, the direct current flows from the positive electrode (6)stationary contact (7)-movable contact (2)-stop switch (6)-negative electrode (6) ' Subsequently,
the speaker ?) n connected to the relay (2) n connected to the rotary contact ? Q is operated. In
this way, the desired speaker (1) (1)... Is operated by switching the dial type changeover switch
(8), the excitation switch (2) and the stop switch (b). ?????? Next, in order to use the
device shown in FIG. 4, the movable contact wedge 6-point is connected if it is connected to the
left contact point 'side of the speaker (11X to be switched) to be operated first. If the right
contact on the right side is busy connected, connect the contact piece QFY with the same contact
rK, and then switch dial switch (8), excitation switch (b), stop switch (b) Can be switched in the
same manner as the switches shown in FIG. In this case, since the diodes a41 ? ?... Connected
to the respective exciting coils (5) (5)... Are connected so as to have opposite polarities to each
other, the left contact (c) ? и и и The current flowing in the exciting coil (5) (5) и и и is not connected
to the exciting coil (5) (5) и и и и и и и contacts on the right side Also, since this is not reversed R, the
speakers connected to the same fixed contact (9J (9)...) Via the diodes .sigma.4a4. In addition, as
the excitation switch (b), an ink-on dial type changeover switch (provided on 8y as shown in FIG.
5) is used and a hook switch w is used, and it is turned off in the normal time but is pressed in
the arrow direction It is desirable to simplify the switch operation so that the switch is turned on
only while the stop switch (b) is automatically opened and closed by the opening / closing
operation 7- '-gate number of the dial type changeover switch (8). In order to do so, for example,
as the dial-type changeover switch (8), an interface dial-type changeover switch (8) 'Y as shown
in FIG. 5 is used, the switch (8)' Y stop switch (b) and Alternatively, it may be interlocked with a
separately formed stop switch (b).
In the present invention, the desired speaker +1) X) r is selected and selected speaker (1) via
relay (2) <2) иии by switching of the dial type changeover switch (8) as described above. Since it
was made to operate by the switch for XY excitation (2) and stop switch ? ░ C, a large number
of speakers (1) (1) ..... The mechanism is very simple, since it is possible to switch, and thus it is
not necessary to provide a number of switches corresponding to the number of speakers (?...
Equipment costs will also be low. In addition, it is possible to connect the dial type changeover
switch (8) and each relay (2) (2) ...-with a single cable wire, and it is possible to operate 5) much
more damaging operations than the conventional one. As the board becomes unnecessary, only
the small-sized dial-type changeover switch (8) is on hand, and the relays (2) (2) иии are behind the
speakers (? (1) иии Since it can be installed in the vicinity, the relay (2) [2) ... ... and the speaker (?
(1) ... ...] can be connected with the lead (7) ... -It can be made short, so there will be no need for
complicated wiring, and as a result, the sound quality characteristics will not be degraded as in
the prior art. Furthermore, since relays (2), (2),... Are used to be 5, by appropriately selecting the
number of contacts of the relays, the speakers (1), (1),. It can also be easily wired so as to turn on
the indicator lamp which indicates the speaker (1) (1)...? The display board which tells that it is
operating on the speaker (1) (1) ? ? ? which is operating like a rice bowl by far (it is possible
to confirm at first sight from a key) There is no need for loading, and therefore, there is no need
to replace the 7-9-1 'plate every time the operation of the speakers (1) (1)... Is switched.
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