JPS6314526Y2

JPS6314526Y2 -

Info

Publication number: JPS6314526Y2
Application number: JP16899278U
Authority: JP
Priority date: 1978-12-11
Filing date: 1978-12-11
Publication date: 1988-04-22
Also published as: JPS5587060U

Description

【考案の詳細な説明】本考案は留守電話装置等に用いるエンドレステ
ープの検出回路、特にメツセージ（Ｔ−１）テー
プに録音された任意の長さのメツセージの終端を
検出する回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endless tape detection circuit used in an answering machine or the like, and particularly to a circuit for detecting the end of a message of arbitrary length recorded on a message (T-1) tape.

通常留守電話装置は、録音すべきメツセージの
長さがいろいろなので、録音時にＴ−１テープに
メツセージの録音が終るとマーカ信号を記録する
方式をとつている。再生時には、メツセージ部分
を再生した後に、マーカ信号を検出すると、Ｔ−
１テープの再生動作が終了する。マーカ信号の録
音は、メツセージ吹込み用のマイクロホンスイツ
チのオフ動作に応じて自動的に行なわれるので、
使用者が不慣れであると、メツセージの吹込み終
了前にマイクスイツチを一時的にオフにして、テ
ープにマーカ信号が録音されてしまうといつた誤
りが起りやすい。テープの冒頭に記録されたマー
カ信号は、当然テープ再生時に検出される。従つ
てかかるテープを再生しようとしても、再生動作
終了前のマーカ信号で停止してしまい、Ｔ−１テ
ープのメツセージが完全に送出されないことにな
る。 Since the length of the message to be recorded varies in answering telephone apparatuses, a method is generally adopted in which a marker signal is recorded on the T-1 tape when the message is finished being recorded. During playback, if a marker signal is detected after playing the message part, the T-
The playback operation for one tape ends. Recording of the marker signal is automatically performed in response to the off operation of the microphone switch for message delivery.
If the user is inexperienced, he or she may easily make the mistake of turning off the microphone switch temporarily before the message is finished, resulting in the marker signal being recorded on the tape. The marker signal recorded at the beginning of the tape is naturally detected when the tape is played back. Therefore, even if an attempt is made to reproduce such a tape, the reproduction operation will stop at the marker signal before the end of the reproduction operation, and the message of the T-1 tape will not be completely transmitted.

本考案の目的は、上述したようなＴ−１テープ
のメツセージ終了前に誤つて録音されたマーカ信
号を検出しない回路構成を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a circuit configuration that does not detect a marker signal erroneously recorded before the end of a message on a T-1 tape as described above.

本考案を図面に従つて説明する。 The present invention will be explained according to the drawings.

第１図において、マーカ信号検出回路は、再生
ヘツド１、増幅器２および検出回路４を直列に接
続した構成である。本考案によれば、テープ再生
の動作開始から一定時間経過後に検出回路４のマ
ーカ信号検出動作を開始させる遅延回路３を、前
記検出回路４に接続する。 In FIG. 1, the marker signal detection circuit has a configuration in which a reproduction head 1, an amplifier 2, and a detection circuit 4 are connected in series. According to the present invention, the detection circuit 4 is connected to the delay circuit 3 which causes the detection circuit 4 to start the marker signal detection operation after a certain period of time has elapsed from the start of the tape playback operation.

この回路の動作を第２図のチヤート図と共に説
明する。なお、第２図のａ〜ｄの信号は第１図の
ブロツク図に示す同一符号の部分に印加されるも
のとする。Ｔ−１テープの再生動作開始と同時
に、誤つて、例えば冒頭に録音されたマーカ信号
が現われる。しかし、遅延回路３の働きにより、
このとき検出回路４はオフに維持されている。従
つてこのマーカ誤信号は検出されず、テープ再生
はそのまゝ継続する。遅延回路３に任意に設定さ
れた遅延時間Ｔ、例えば５秒の間検出回路４はオ
フに保たれるから、テープ冒頭から時間Ｔの間に
マーカ信号が誤つて録音されていても、かゝる誤
信号は検出されない。遅延時間Ｔ経過後、検出回
路４はオンに切換わり、メツセージの終端で現わ
れる正しいマーカ信号を検出する。マーカ信号検
出に従つて検出回路４の出力はＴ−２テープ録音
回路等に送られる。 The operation of this circuit will be explained with reference to the chart diagram in FIG. It is assumed that signals a to d in FIG. 2 are applied to portions with the same reference numerals shown in the block diagram of FIG. 1. At the same time as the reproduction operation of the T-1 tape starts, a marker signal recorded at the beginning, for example, appears by mistake. However, due to the function of delay circuit 3,
At this time, the detection circuit 4 is maintained off. Therefore, this marker error signal is not detected and tape playback continues. Since the detection circuit 4 is kept off during the delay time T arbitrarily set in the delay circuit 3, for example, 5 seconds, even if the marker signal is erroneously recorded during the time T from the beginning of the tape, the erroneous signals are not detected. After the delay time T has elapsed, the detection circuit 4 is switched on and detects the correct marker signal appearing at the end of the message. In accordance with marker signal detection, the output of the detection circuit 4 is sent to a T-2 tape recording circuit or the like.

本考案によれば、極めて簡単な遅延回路を設け
るだけで、誤操作に基づく留守電話装置Ｔ−１テ
ープ再生の誤動作を防止することができる。 According to the present invention, by simply providing an extremely simple delay circuit, it is possible to prevent malfunctions in the tape playback of answering machine T-1 due to erroneous operation.

[Brief explanation of the drawing]

第１図は本考案のマーカ信号検出回路を示すブ
ロツク図、第２図はこの検出回路の動作を説明す
る信号チヤートである。１……ヘツド、２……増幅器、３……遅延回
路、４……検出回路。 FIG. 1 is a block diagram showing a marker signal detection circuit of the present invention, and FIG. 2 is a signal chart explaining the operation of this detection circuit. 1...Head, 2...Amplifier, 3...Delay circuit, 4...Detection circuit.

Claims

[Scope of utility model registration request]

A circuit that records a marker signal by operating a switch at the end of a message of arbitrary length recorded on an endless tape used in an answering machine, etc., and detects this recorded marker signal during playback. A marker signal detection circuit comprising a delay circuit that causes the detection circuit to start a marker signal detection operation after a certain period of time has elapsed from the start.