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JPS49108573

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DESCRIPTION JPS49108573
February 20, 1943 Secretary General of Patent Office-3, Patent applicant address Tokyo, black i
? ? J R31, No. 6, No. 7 и 1?; 02 (J5 t, иии Specification of Japan Patent Office open Patent
Publication: JP-A-49-108573 [Phase] Published Japanese Patent Application No. (1974) 10.16 ?
Japanese Patent Application No. 48-2050! 088 days am / ', (1973), z, z ?? examination request
(all 4 pages) 1 name of the invention
Switch device
DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention) The present invention
relates to a switch device that can be used for a speaker switching switch of a large output
amplifier, a large current switch, and the like. Conventionally, a speaker switching switch of a
large output amplifier also uses a switch, a relay or the like, but has the following drawbacks. (1)General turtle f-= circuit No. 7 / g is bad when switching is performed at the time of large output
when arc switch is used for switching circuit and damage is likely to occur, and contact failure is
remarkable. C и Case welds and ceases to work. (2) If a power supply 1 notch is used, the problem
like (1) will be eliminated, but if the cost is high, the contact is not self-cleaning, not easy to cause
contact failure at small current (small output) ░ C . (3) When using a power switch-Generally,
the operating force is large compared to other switches? In the case of using a (4) relay, which
requires a large number of screws, it is necessary to increase the cost and to use multiple
circuits. SUMMARY OF THE INVENTION The present invention provides a switch device that
solves the following five problems. (Summary of the Invention) EndPage: 1 FIG. 1 is a crosssectional view of one embodiment of the switch device of the present invention, which is
configured by a bush type switch. In FIG. 1, the bush type switch I is formed of the contacts a and
b and the common terminal C and the switching contact piece d. It has a second switch S2
composed of a contact piece g. When the lever 2 of the tunoshi switch 1 is pressed, the switching
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contact 6 retentive g fixed on the shaft 3 is moved, whereby in the first switch S1 first
conduction between contacts ac, opening between contacts bc Are switched between contacts b
and c and open between contacts a and b, and at the same time interlocked with the first switch
S1 and the second switch 82 is initially open between contacts e and f Is turned on during the
switching operation of the first switch S1 and is opened again after the switching operation is
completed. FIG. 2 is an electrical connection diagram of the switch device according to the
present invention shown in FIG. 1, and shows the switching operation of the first switch S1
composed of contacts *, b, switching terminal e2L and switching contact d. On the other hand,
the timing of the opening / closing operation of the second switch S2 configured of the contact e,
the common terminal f, and the switching contact g is set to the conditions described below. FIG.
3 is a time chart of the device according to the present invention shown in FIG. In the figure, it is
opened at the start of switching operation of the switch device.
Between the completion of the switching operation and Te, a time T2 at which the conduction
between the contacts a and b ceases to occur, a time T3 at which the conduction between the
contacts b and c starts, and a time T1 at which the conduction between the contacts e and f starts
Similarly, if it is time T4 when the conduction between the contacts e and f disappears, then 'ro
<Tt <T'2 ........... (1) Tl <T3
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии (3) T2 <T4 и (4) Adjust
the timings of the first switch S1 and the second switch S2 so as to satisfy the above (1) to (41ff'/ ?). That is, in FIG. 2, the contact f of the second switch S2 and the switching contact g are
connected immediately before the contact a of the first switch S1 and the switching contact d are
separated, and the first switch S1 is connected. When the switching contact d is connected, the
contact f of the second switch s2 is separated from the switching contact g. As mentioned above,
although an example at the time of implementing a switch device by the present invention by a
bush type switch was described, if it is constituted so that the timing of switching operation of
two switches which vibrate can satisfy the above-mentioned required conditions It can be
activated with any type of switch such as slide type. Next, application examples of the switch
device according to the present invention will be described. FIG. 4 shows an application example
of the switch device according to the present invention, which is used in a speaker switching
circuit of a large output amplifier. In the figure, the input terminal 41 [the applied signal is
amplified by the signal... 42 and supplied to the speaker Sr), K via the first switch Sl. The @ 2
switch s2 interlocked with the first switch 81 is connected between the amplifier 42 and the
ground. In such a circuit, the timings of the first switch S1 and the second switch s2 are adjusted
so as to be added by the equations (1) to (4), and the first switch The second switch S? Is closed
immediately before the speaker SPY signal supply is cut off by the switch s1 of '? +-+, I> 1 and
the input terminal 411 (applied Since the input signal flows to the ground side, the output side of
the 7th block 4z is in a non-current state. Then, immediately after the switch S1 of the gsl is
switched to the speaker switching circuit, the second switch S2 is reopened, so that the human
power signal applied to the human power terminal 41 flows to the amplifier 42 and is amplified
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and supplied to the speaker SP2K. Become. As described above, since the output side of the
amplifier 42 is in a non-current state during switching operation, there is no concern that an arc
or the like will occur in the first switch 81 even if speaker switching is performed at large output.
It can be used with high reliability.
FIG. 5 is an example in which the switch device according to the present invention, K, is applied
to a speaker switching circuit of a stereo amplifier. In the figure, the stereo signal applied to the
input terminal 51 and 52 is amplified by the amplifier 53.54EndPage: 2 respectively, and the
third switch s3 performing the same switching operation as the first switch S1 and the first
switch S1 is used. Then, the speakers SP3 and SF3K are supplied. The collectors and emitters of
the transistors Q1 and Q2 are connected between the input side of the amplifier 530 and the
ground and between the input side of the amplifier 54 and the ground, and the bases are
commonly connected to each other via the second switch S2 and the resistor R1. It is connected
to the 10 B power supply. In this circuit, when the second switch S2 is closed, a 10B power
source is applied as a bias to the base of the transistor QLQ2 via the resistor R1 and the second
switch s2, and the transistor 791 turns on and the input The stereo signal applied to the terminal
51.52 flows to the ground side via the transistors Q1 and Q2. Therefore, since the output side of
the amplifier 53.54 is in a non-current state, switching between the first switch S1 and the third
switch S3 can be performed safely. Furthermore, FIG. 6 is an application example when the
switch device according to the present invention is used as a switch for large current. A large
current signal is supplied to the input terminal 61, a transistor and a load RLI. A resistor R2 is
connected between the collector and base of the transistor Q3, and a series circuit of a resistor
R3 and a second switch 82 is connected between the base and the ground. The values of the
resistors R2 and R3 are set so that the transistor Q3 becomes nonconductive when the second
switch S2 is closed and becomes conductive when the second switch S2 is opened. In such a
configuration, if the first switch S1 is to be switched to the load RLZ side, the second switch S2 is
closed, the transistor Q3 becomes nonconductive, and after the switching is completed, the
second switch S2 is opened. 7 becomes conductive again, and a large current signal is supplied to
the load RL2. Also in this case, since the switching operation of the first switch S1 is performed
in a non-current state, it is possible to use the small current switch. (Effects of the Invention) As
described above, the switch device of the present invention has various effects described below
and can be applied to various switching circuits. (A) Switching of a large current circuit becomes
possible by a switch for a general electronic signal circuit. (B) At the time of switching, it is
possible to eliminate the arc which damages the contact and shortens the life.
? ? Since a switch for a general electronic signal circuit is used, contact failure does not occur
even with a minute current. (A) The operating force can be reduced compared to a high current
switch. (E) Since the same effect can be obtained without using a large current switch, relay or
the like, the cost can be significantly reduced. (To) using special parts (и not easy to manufacture.
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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of an embodiment of the
switch device of the present invention, FIG. 2 is an electrical connection diagram of the switch 1
of the present invention, and FIG. 3 is a time of the switch device of the present invention. The
charts of FIG. 4, FIG. 5, and FIG. It is an application circuit diagram of II. In Figure 1 m: 7-this
looks ?7 Ko ? C-C EndPage: ?
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