JPS5830247Y2 - Recording/playback switching circuit for tape recorder with built-in microphone - Google Patents
Recording/playback switching circuit for tape recorder with built-in microphoneInfo
- Publication number
- JPS5830247Y2 JPS5830247Y2 JP9835477U JP9835477U JPS5830247Y2 JP S5830247 Y2 JPS5830247 Y2 JP S5830247Y2 JP 9835477 U JP9835477 U JP 9835477U JP 9835477 U JP9835477 U JP 9835477U JP S5830247 Y2 JPS5830247 Y2 JP S5830247Y2
- Authority
- JP
- Japan
- Prior art keywords
- switch
- recording
- playback
- built
- microphone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Description
【考案の詳細な説明】
本考案は、内蔵マイクロホン付テープレコーダーに釦い
て録音、再生スイッチの切換え途中に於ける・・ウリン
グを防止するようになした切換回路に関する。[Detailed Description of the Invention] The present invention relates to a switching circuit that prevents ringing during switching between recording and playback switches in a tape recorder with a built-in microphone.
第１図、第２図は従来の切換回路である。1 and 2 show conventional switching circuits.
スイッチ１，８は連動し、接点Ｐ側は再生時、Ｒ側は録
音時に接続される。Switches 1 and 8 are interlocked, with the P side being connected during playback and the R side being connected during recording.
再生ヘッド２からの信号は、プリアンプ３．ラインアン
プ４．パワアンプ５で増巾され、スピーカ６より音とし
て出力される。The signal from the playback head 2 is sent to the preamplifier 3. Line amplifier 4. The signal is amplified by the power amplifier 5 and output as sound from the speaker 6.
今スイッチ７．８を切換える場合、第１図では、スイッ
チＴがＲ接点に接続される前にスイッチ８がＲ接点に接
続されること。If we now switch switch 7.8, in FIG. 1, switch 8 is connected to the R contact before switch T is connected to the R contact.
又第３図では、スイッチ１のＲ接点に接続される前にス
イッチ８のＰ接点が切れることが切換途中でのハウリン
グを起こさない条件となり、スイッチＴと８の間で切換
えタイミングを取る必要がある。In addition, in Fig. 3, the P contact of switch 8 is disconnected before it is connected to the R contact of switch 1, which is a condition for preventing howling during switching, and it is necessary to take the switching timing between switches T and 8. be.
録音、再生の切換え回路は、この２回路だけではないた
め、スイッチ内でのタイミングを取る回路の位置が製品
により異なり、多くの種類のスイッチが必要となる。Since these two circuits are not the only switching circuits for recording and playback, the position of the timing circuit within the switch differs depending on the product, and many types of switches are required.
本考案の目的は、スイッチ間のタイミングを取る必要を
なくしてスイツ〜チを標準化し、もって製品のコストダ
ウンを計り得るようにした切換回路を提供するにある。An object of the present invention is to provide a switching circuit that eliminates the need for timing between switches, standardizes the switches, and thereby reduces the cost of the product.
本考案では従来使われているスイッチを使用することと
し、一般的には、録音、再生切換スイッチはショーテイ
ングタイプ、すなわち、切換途中でＰ、Ｒの両接点が一
度継がってフう１ら切換わることを利用したものである
。This invention uses a conventionally used switch, and generally the recording/playback selector switch is a shorting type, that is, both the P and R contacts are connected once during switching, and the switches switch back and forth. This takes advantage of switching.
第３図は本考案の一実施例である。FIG. 3 shows an embodiment of the present invention.
１は内蔵マイクロホン、２は再生ヘッド、３，４．５は
それぞれ、ブリ、ライン、パワーアンプである。1 is a built-in microphone, 2 is a playback head, and 3 and 4.5 are a stereo, line, and power amplifier, respectively.
６はスピーカ、７，８は録音、再生切換スイッチ、９は
ボリウである。6 is a speaker, 7 and 8 are recording/playback selector switches, and 9 is a volume control.
スイッチ７．８は同一スイッチで連動してトリ、再生時
にはＰ接点、録音時にはＲ接点と接続する。Switches 7 and 8 are the same switch and are connected to the P contact during playback and the R contact during recording.
再生時にはスイッチ８のＰ接点は接地されているため、
スイッチ７のＲ接点も接地されている。During playback, the P contact of switch 8 is grounded, so
The R contact of switch 7 is also grounded.
今再生時から録音に切換える途中で・・ウリングを起こ
さないためには、スイッチ１のＲ接点が接続される前に
スイッチ８のＲ接点が接地される必要がある。In order to prevent ringing while switching from playback to recording, the R contact of switch 8 must be grounded before the R contact of switch 1 is connected.
そこでスイッチ８をショーテイングタイプとすれば、Ｐ
、Ｒ接点は必らずどちらかが接地されている。Therefore, if switch 8 is a shorting type, P
, one of the R contacts is always grounded.
このことは、スイッチＩがＲ接点に接続されても、Ｒ接
点はスイッチ８のＰ接点により接地されるか、Ｒ接点が
接地されるかのどちらかであり、切換途中に於てスピー
カ６からは内蔵マイクロホン１からの信号は出ないため
、ハウリングは起こさない。This means that even if switch I is connected to the R contact, either the R contact is grounded by the P contact of switch 8, or the R contact is grounded, and during switching, the Since no signal is output from built-in microphone 1, howling does not occur.
本考案により、スイッチ間のタイ□ングを取ることなく
、又従来の回路にスイッチ間を半接続するという構成を
付カロするだけでハウリングが防止できるので、きわめ
て実用的なものである。The present invention is extremely practical because howling can be prevented without requiring any tying between the switches or by simply adding a configuration of semi-connecting the switches to the conventional circuit.
な釦第３図の再生ヘッドを録音、再生ヘッドとして兼用
する際には、第４図に示すようにスイッチ１０及び録音
、再生ヘッドを接続すればよい。When the playback head shown in FIG. 3 is used as both a recording and playback head, the switch 10 and the recording and playback heads may be connected as shown in FIG.
第１図、第２図は従来の切換回路図を示し、第３図は本
考案の切換回路の一実施例回路図を示し、第４図は本考
案の他の実施例の回路図を示す。
１・・・内蔵マイクロホン、２・・・再生ヘッド、１゜
８・・・スイッチ。1 and 2 show conventional switching circuit diagrams, FIG. 3 shows a circuit diagram of one embodiment of the switching circuit of the present invention, and FIG. 4 shows a circuit diagram of another embodiment of the present invention. . 1...Built-in microphone, 2...Playback head, 1°8...Switch.
Claims (1)
えるスイッチと、アンプからスピーカ１での途中に於い
て録音時に信号を接地するスイッチとを互いに連動する
ように設け、後者のスイッチはその切換途中で再生側及
び録音側両接点が接続されるようになしかつその共通端
子を常時接地し、前者のスイッチの内蔵マイクロホン側
の接点と後者の再生時に接地される接点とを接続したこ
とを特徴とする内蔵マイクロホン付テープレコーダの録
音、再生切換回路。A switch for switching between the built-in microphone signal and the playback head signal, and a switch for grounding the signal during recording from the amplifier to speaker 1 are provided so as to be interlocked with each other. The switch is characterized in that the contacts on both the playback side and the recording side are connected, and their common terminal is always grounded, and the contact on the built-in microphone side of the former switch is connected to the contact that is grounded during playback on the latter. Recording/playback switching circuit for a tape recorder with built-in microphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9835477U JPS5830247Y2 (en) | 1977-07-25 | 1977-07-25 | Recording/playback switching circuit for tape recorder with built-in microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9835477U JPS5830247Y2 (en) | 1977-07-25 | 1977-07-25 | Recording/playback switching circuit for tape recorder with built-in microphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5427614U JPS5427614U (en) | 1979-02-23 |
| JPS5830247Y2 true JPS5830247Y2 (en) | 1983-07-04 |
Family
ID=29034045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9835477U Expired JPS5830247Y2 (en) | 1977-07-25 | 1977-07-25 | Recording/playback switching circuit for tape recorder with built-in microphone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5830247Y2 (en) |
-
1977
- 1977-07-25 JP JP9835477U patent/JPS5830247Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5427614U (en) | 1979-02-23 |
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