JPH051131Y2 - - Google Patents

Description

[Detailed explanation of the invention] As shown in Fig. 1, the conventional amplifier input switching device selects each input signal of phono P ₁ , tuner T ₁₁ , and external A ₁ with one independent switch S ₁ The configuration is such that the output is selectively switched by another independent switch S ₂ , and the two independent switches S ₁ and S ₂ are operated separately, making the operation complicated. and selector switch S ₂ is on the tape side.
If the tape is connected to T ₁ or T ₂ , there are many inconvenient operations such as switching S ₁ to the input you want to listen to but not being able to listen to it because S ₂ is connected to the tape side.

This invention is an input switching device that eliminates such drawbacks, and as shown in Figs. 2 and 3,
The phono terminal _P1 , the tuner input _T11 , and the external input terminal _A1 are connected to the first, second, and third contacts of two locklease type five-contact push switches _SW1 and three-contact push switches _SW2 , namely _T1 , _T2 , _T3 , and
_T1 ', _T2 ', _T3 ', and the switching pieces of the change-over switch _SW2 are connected to the recording terminals _TR1 ,
To TR ₂ , playback terminals TP 1 and TP ₂
TP ₂ is switched to the remaining fourth and fifth contacts of switch SW ₁ .
_T4 and _T5 , the switching piece _of the switch _SW2 is connected to the output terminal To, and the first contacts T1 and T1 _' of the change-over switches _SW1 and _SW2 are connected to each other, and the second contacts
This is an amplifier input switching device in which _T2 , _T2 ' and the third contacts _T3 , _T3 ' are linked by push buttons (labeled A, T, and P, respectively) that can operate both push rods simultaneously, as shown in Figure 2.

When you press any of the pushbuttons P, T, and A corresponding to phono, tuner, and external,
Both SW ₁ and SW ₂ are locked in their positions at the same time. Then, when you press the push button for either Tape 1T ₁₁ or Tape 2T ₁₂ , only the pressed switch SW ₁ operates.
The contacts corresponding to P, T, or A on the SW ₂ side remain locked in the state they were in when first pushed.

By doing this, the phono switch, tuner, and
By simply pressing the external, tape 1, or tape 2 push button, you can immediately retrieve the desired input signal, and also change the selector switch to the fourth (or tape 2) corresponding to tape 1 (or tape 2). 5) When switching to contact, the changeover switch
SW ₂ remains at the contact position of the selected source, and only changeover switch SW ₁ switches to the 4th (or 5th) contact, so when tape 1 (or tape 2) is simply in playback mode, the tape 1 (or or tape 2), but when tape 1 (or tape 2) is in record mode for the source initially selected and locked by selector switch SW ₂ :
The recording state of the tape 1 (or tape 2) can be monitored, which is convenient as there is no need for erroneous operations as in the prior art.

The amplifier input switching device according to the present invention has the above-mentioned configuration, so whereas in the past, two systems of switches were operated, which required complicated operations, the present invention has the appearance of only one system of switches. It can be operated with just a button switch, and the operation is simple.
This provides an extremely easy to use amplifier.

[Brief explanation of drawings]

FIG. 1 is a conventional input section switching circuit diagram, FIG. 2 is an explanatory diagram of the push switch section of the input switching device of the present invention, and FIG. 3 is an input section switching circuit diagram of the present invention. SW ₁ and SW ₂ are lock release type push switches, respectively, and T ₁ , T ₂ , T ₃ , T ₄ , and T ₅ are contact 1, contact 2, contact 3, contact 4, contact 5, and T ₁ of SW ₁ , respectively. ′, T ₂ ′, T ₃ ′ are contact 1 of SW ₂ ,
Contact 2, contact 3, To are output terminals, P ₁ , P ₁₁ , A ₁
are a phono input terminal, a tuner input terminal, and an external input terminal, respectively, TR ₁ and TR ₂ are recording terminals for tape 1 and tape 2, respectively, and TR ₁ and TR ₂ are playback terminals for tape 1 and tape 2, respectively.

Claims (1)

[Scope of utility model registration request] The phono input terminal P ₁ , the tuner input terminal T ₁₁ , and the external input terminal A ₁ are connected to the first, second, and third contacts T ₁ of two mutually interlocking lock release type push-change switches SW ₁ and SW ₂ . , T ₂ , T ₃ , T ₁ ′, T ₂ ′,
T ₃ ' respectively, and connect the switching pieces of the switching switch SW ₂ to the recording terminals TR 1 and TR 2 of tape ₁ and tape _2, respectively.
, the reproduction terminals TP ₁ and TP 2 of tape 1 and tape ₂ are connected to the fourth and fifth contacts T ₄ and T ₅ of the changeover switch SW ₁ .
, connect the switching piece of the changeover switch SW ₁ to the output terminal To, and connect the first contacts T ₁ and T ₁ ' of the changeover switch SW ₁ and the changeover switch SW ₂ to each other, and the second contacts T ₂ and T ₂ to each other. An input switching device for an amplifier, characterized in that the third contacts T ₃ and T ₃ ' are interlocked with each other by common push buttons (P, T, A).