JPS61287061A - Stopping circuit at voltage drop - Google Patents
Stopping circuit at voltage dropInfo
- Publication number
- JPS61287061A JPS61287061A JP12813985A JP12813985A JPS61287061A JP S61287061 A JPS61287061 A JP S61287061A JP 12813985 A JP12813985 A JP 12813985A JP 12813985 A JP12813985 A JP 12813985A JP S61287061 A JPS61287061 A JP S61287061A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- microcomputer
- deck
- power supply
- transistor
- 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.)
- Pending
Links
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はバッテリ等の限定された直流電源により駆動さ
れるマイコン制御のカセットデツキメカに係り、特にラ
ジカセ等に好適な減電圧時のデツキメカ停止回路に関す
る。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a microcomputer-controlled cassette loading mechanism driven by a limited direct current power source such as a battery, and a loading mechanism stopping circuit during reduced voltage, which is particularly suitable for radio-cassette players and the like. Regarding.
従来のラジカセにおいては、電池の消耗が。 In conventional radio and cassette players, the battery is consumed.
その製品の保障する電圧以下になりた場合、危険を知ら
せる手段が取られていた。例えば電池消耗表示ランプを
点灯させる等である。または電池が消耗し、デツキメカ
がプレイ状態で停止した場合１手動でプレイ状態を解除
する方法が取られている。しかしながら、いずれも正常
動作を保障するものではなく、前者はメカロック後者は
回転数の低下１回転ムラの異常が発生する。なおこの種
の装置として関連するものとして、特公昭５３−２４６
０８号等が挙げられる〔発明の目的〕
本発明の目的は、電池の消耗によりデツキメカの動作が
前述した異常が発生する以前に検出する手段を設け、マ
イコンにより強制的にこれを停止させる減電正時停止回
路を提供することにある。If the voltage falls below the guaranteed voltage of the product, measures were taken to warn of danger. For example, a battery consumption indicator lamp may be turned on. Alternatively, if the battery is exhausted and the Detsuki Mecha stops in the play state, there is a method of manually canceling the play state. However, neither of these guarantees normal operation; the former is mechanically locked, and the latter causes abnormalities such as a drop in rotational speed and unevenness in one rotation. Furthermore, as a related device of this type, the Japanese Patent Publication No. 53-246
No. 08, etc. [Object of the Invention] The object of the present invention is to provide a means for detecting the operation of the deck mechanism due to battery consumption before the above-mentioned abnormality occurs, and to reduce the power by forcibly stopping the operation using a microcomputer. The object of the present invention is to provide an hourly stop circuit.
このため本発明は、電池が消耗しデツキメカの正常動作
が保障できる電圧以下になったときこの電圧を検知し、
メカ制御マイコンの停止入刃端子をアースに短絡し、実
質的にはストップキーを押したと同じ状態にしてメカを
停止させる０
〔発明の実施例〕
本発明の実施例を図により説明する。For this reason, the present invention detects the voltage when the battery is exhausted and the voltage falls below the voltage that can ensure normal operation of the deck mechanism.
The stop input terminal of the mechanical control microcomputer is short-circuited to ground, and the mechanism is stopped in substantially the same state as when the stop key is pressed. [Embodiment of the Invention] An embodiment of the present invention will be described with reference to the drawings.
１はデツキメカ駆動電源である。トランジスタ３のＱｌ
のベース電圧ｖＢとＶｃ、ツェナーダイオードＺＤＩの
電圧Ｖｚとが下記に示した関係にあるとき、
トランジスタ３のＱｌは導通せず、トランジスタ９のＱ
２も導通せず、従りてマイコンＩＣＩの５ＴＯＰ端子は
アース罠短絡されず、デツキメカはプレイ状態を維持す
る。しかしながらＶｃは下降して行くと、下式の関係が
成立する。1 is a power supply for driving the deck mechanism. Ql of transistor 3
When the base voltages vB and Vc of , and the voltage Vz of Zener diode ZDI have the relationship shown below, Ql of transistor 3 does not conduct, and Ql of transistor 9 does not conduct.
2 is not conductive, so the 5TOP terminal of the microcomputer ICI is not short-circuited to the earth trap, and the deck mechanism maintains the play state. However, as Vc decreases, the following relationship holds true.
このときトランジスタＱｌ 、Ｑ２は導通し、マイコン
エＣ１の８ＴＯＰ端子がアースに短絡され。At this time, the transistors Ql and Q2 become conductive, and the 8TOP terminal of the microcontroller C1 is shorted to ground.
デツキメカは停止する。The deep mechanism stops.
本実施例によればツェナーダイオードＺＤＩの値を厳選
することにより、±０．２ｖ程度の電圧範囲内でＶｃの
動作保障電圧を設定することができる。尚、電解コンデ
ンサ５は、メカ起動時に一時的にＶｃが下降するので、
このとき、トランジスタ３のＱｌが導通状態になるのを
防ぐためのものである。According to this embodiment, by carefully selecting the value of the Zener diode ZDI, the operation guaranteed voltage of Vc can be set within a voltage range of approximately ±0.2V. In addition, since Vc of the electrolytic capacitor 5 temporarily decreases when the mechanism is started,
At this time, this is to prevent Ql of the transistor 3 from becoming conductive.
本発明によれば、ツェナーダイオードＺＤＩの電圧によ
り設定電圧が決定され、これのバラツキが±０．ＩＶあ
り、またトランジスタＱｓのＯＮ電圧の温ＦＩＬＫよる
変化があるため、実力的には＋Ｖｃが設定電圧８ｖを中
心にして±Ｑ、 ３ Ｖ＠度のバラツキに押えることが
できた。これは、現実的に充分な精度である。According to the present invention, the set voltage is determined by the voltage of the Zener diode ZDI, and the variation thereof is ±0. Since there is an IV and the ON voltage of the transistor Qs varies depending on the temperature FILK, it was possible to suppress the variation in +Vc to ±Q, 3 V@ degrees around the set voltage of 8 V. This is realistically sufficient accuracy.
図は本発明の実施例の回路図である。
１−・・カセットデツキメカ駆動電源
２．４・・・Ｑ１バイアス抵抗
３・・・ＰＮＰ トランジスタ
５・・・コ、ンデンサ ６・・・Ｑ２バイアス抵抗
７・・・Ｑ１エミッタ抵抗 ８・・・ツェナーダイオー
ド９−Ｎ Ｐ Ｎ トランジスタ
１０・・・メカ駆動マイコンThe figure is a circuit diagram of an embodiment of the present invention. 1-...Cassette mechanical drive power supply 2.4...Q1 bias resistor 3...PNP transistor 5...Capacitor 6...Q2 bias resistor 7...Q1 emitter resistor 8...Zener Diode 9-N P N Transistor 10... Mechanical drive microcomputer
Claims (1)
け、マイコンの制御により動作するカセットデッキメカ
を搭載したテープレコーダであって、供給電力が下降し
、デッキメカの動作が不完全になる前に、前記下降電圧
を検知する手段を設け強制的にマイコン等によりデッキ
メカ停止を行うことを特徴とする減電圧時停止回路。A tape recorder equipped with a cassette deck mechanism that receives power from batteries such as dry batteries and car batteries and operates under the control of a microcomputer. A circuit for stopping at reduced voltage is characterized in that a means for detecting a falling voltage is provided and a deck mechanism is forcibly stopped by a microcomputer or the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12813985A JPS61287061A (en) | 1985-06-14 | 1985-06-14 | Stopping circuit at voltage drop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12813985A JPS61287061A (en) | 1985-06-14 | 1985-06-14 | Stopping circuit at voltage drop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61287061A true JPS61287061A (en) | 1986-12-17 |
Family
ID=14977363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12813985A Pending JPS61287061A (en) | 1985-06-14 | 1985-06-14 | Stopping circuit at voltage drop |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61287061A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0265248U (en) * | 1988-11-01 | 1990-05-16 |
-
1985
- 1985-06-14 JP JP12813985A patent/JPS61287061A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0265248U (en) * | 1988-11-01 | 1990-05-16 |
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