KR900006800Y1 - Recording cancel circuit in VCR - Google Patents
Recording cancel circuit in VCR Download PDFInfo
- Publication number
- KR900006800Y1 KR900006800Y1 KR2019870022018U KR870022018U KR900006800Y1 KR 900006800 Y1 KR900006800 Y1 KR 900006800Y1 KR 2019870022018 U KR2019870022018 U KR 2019870022018U KR 870022018 U KR870022018 U KR 870022018U KR 900006800 Y1 KR900006800 Y1 KR 900006800Y1
- Authority
- KR
- South Korea
- Prior art keywords
- recording
- switching transistor
- transistor
- key switch
- emitter
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- 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.)
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/026—Control of operating function, e.g. switching from recording to reproducing by using processor, e.g. microcomputer
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Studio Circuits (AREA)
Abstract
내용 없음.No content.
Description
제1도는, 본 고안의 회로도.1 is a circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 마이콤 20 : 레코드 방지용 스위칭회로부10: micom 20: record circuit switching circuit
Q1-Q6: 스위칭 트랜지스터 SW1: 녹화 취소키 스위치Q 1 -Q 6 : Switching transistor SW 1 : Cancel recording key switch
SW2: 이젝트(eject)키 스위치 R1-R8: 저항SW 2 : Eject key switch R 1- R 8 : Resistance
본 고안은 VCR(비데오 카세트 레코오드)에 있어서, 특히, 녹화 취소키 스위치를 이용하여 녹화 취소키 스위치가 "온"상태에서는 레코드 동작을 방지하도록 하고, 또, 녹화취소 키 스위치가 "오프"상태에서는 레코드 기능을 수행할 수 있도록 한 녹화 취소 회로에 관한 것이다.In the present invention, in a VCR (video cassette recorder), in particular, the recording cancel key switch is used to prevent the recording operation when the recording cancel key switch is in the "on" state, and the recording cancel key switch is in the "off" state. Regarding the recording cancellation circuit that allows the record function.
종래의 VCR에 있어서, 비데오 카세트 테이프에 안전핀이 있는 경우에는 테이프를 삽입시킨후 사용자가 레코드 보턴을 누르게 되면 즉시 레코드 모드로 전환되어 녹화하도록 되어 있다.In the conventional VCR, when the video cassette tape has a safety pin, when the user presses the record button after inserting the tape, the recording mode is immediately switched to recording mode.
그러나 이러한 종래의 VCR에 있어서, 비데오 카세트 테이프에 안전핀이 삭제되지 않을 경우에 사용자가 녹화를 원하고자 할때에는 원터치를 이용하여 레코드를 수행하도록 하였으며, 또, 사용자가 녹화를 원하지 않을 경우, 즉, 사용자 실수로 녹화키를 누르게 되면 테이프가 레코드되어 테이프가 손상하게 되는 문제점이 있었다.However, in such a conventional VCR, when the safety pin is not deleted from the video cassette tape, when the user wants to record, the user can perform the recording by using one touch, and when the user does not want to record, that is, the user If you press the record key by mistake, there is a problem that the tape is recorded and the tape is damaged.
본 고안은 이러한 문제점을 해결하기 위해, 특히, 레코오드 방지용 스위칭회로부를 이용한 간단한 회로를 구성하여 녹화취소 키 스윗치가 "온"상태에서는 레코드 동작을 방지토록 하고, 또 녹화취소 키 스윗치가 "오프"상태에서는 레코드기능을 수행할 수 있도록 하는 녹화 취소 회로를 제공하고자함에 그 목적이 있다.In order to solve this problem, the present invention, in particular, by configuring a simple circuit using the recording prevention switching circuit portion to prevent the recording operation when the recording key switch is "on", and the recording key switch is "off" The purpose is to provide a recording canceling circuit for performing a recording function.
이를 첨부한 도면에 의하여 상세히 설명하면 다음과 같다.When described in detail by the accompanying drawings as follows.
마이콤(10)의 녹화안전핀(①)단자와 녹화핀(②)단자에는 레코오드 방지용 스위칭회로부(20)의 내부에 구성된 스위칭트랜지스터(Q1), (Q4)의 베이스측을 각각 연결하고, 상기 스위칭트랜지스터(Q1)의 에미터측에는 스위칭트랜지스터(Q2)의 에미터측과 스위칭트랜지스터(Q3)의 베이스측을 연결하고, 상기 스위칭트랜지스터(Q2)의 베이스측은 녹화취소 키 스위치(SW1)의 고정단자에 연결한다. 또한 스위칭 트랜지스터(Q3)의 에미터측에는 스위칭 트랜지스터(Q4), (Q5)의 에미터측과 저항(R3), (R4) 및 베이스측을 각각 연결되게 구성하고, 상기 스위칭트랜지스터(Q5)의 콜렉터측에는 저항(Q7), (Q8)을 통하여 스위칭트랜지스터(Q6)의 베이스측과 콜렉터측 사이에는 이젝트 키 스윗치(SW2)를 연결하고, 상기 이젝트 키 스윗치(SW2)의 일단에는 마이콤(10)의 핀(③)단자를 연결하여서 구성한 것이다.To the recording safety pin (①) terminal and the recording pin (②) terminal of the microcomputer 10, respectively, connect the base side of the switching transistors Q 1 and Q 4 configured inside the recording prevention switching circuit unit 20, The emitter side of the switching transistor Q 1 is connected to the emitter side of the switching transistor Q 2 and the base side of the switching transistor Q 3 , and the base side of the switching transistor Q 2 is a recording cancel key switch SW. Connect to the fixed terminal of 1 ). Also configured to be respectively connected to the emitter teocheuk and resistance (R 3), (R 4 ) and the base side of the switching transistor (Q 3) the emitter switching transistor (Q 4) side of, (Q 5), and the switching transistor ( The ejector key switch SW 2 is connected between the base side and the collector side of the switching transistor Q 6 through resistors Q 7 and Q 8 on the collector side of the Q 5 ), and the eject key switch SW 2. ) Is configured by connecting the pin (③) terminal of the microcomputer 10 to one end.
이와같이 구성된 본 고안의 작용효과를 설명하면 다음과 같다.Referring to the effect of the present invention configured as described above are as follows.
먼저 VCR에 비데오 카세트를 삽입시켜서 비데오 카세트에 안전핀이 있으면 마이콤(10)의 녹화 안전핀(①)단자에는 "하이"신호가 공급된다. 이와같이 녹화 안전핀(①)단자에는 "하이"신호가 공급되므로 레코드는 동작하게 되는데, 이때 레코드 카세트의 녹음 취소 키 스윗치(SW1)가 "온"상태가 되면, 스위칭 트랜지스터(Q2)의 베이스측에는 "하이"신호가 가해지게 되고, 또, 마이콤(10)의 녹화안전핀(①)단자의 "하이"신호는 스위칭트랜지스터(Q1)의 베이스측에 가해지게 되므로 상기 스위칭 트랜지스터(Q1) 및 (Q2)는 턴오프되어 스위칭트랜지스터(Q3)의 베이스측에는 "하이"신호가 가해지게 된다. 이때 마이콤(10)의 녹화핀(②)단자의 "하이"신호는 스위칭 트랜지스터(Q4)의 베이스측에 가해지게 되므로 상기 스위칭 트랜지스터(Q3) 및 (Q4)는 턴오프된다. 이와같이 (Q3)와 (Q4)가 모두 턴오프되므로 상기 스위칭 트랜지스터되므로(Q4)의 하이신호는 저항(R3), (R4)을 통하여 스위칭 트랜지스터(R5)의 베이스측에 가해지게 되므로써 스위칭트랜지스터(Q5)는 턴온되고, 따라서 스위칭 트랜지스터(Q6)도 턴온되어 이젝트 키 스윗치(SW2)를 동작시킨것과 마찬가지로 되므로 비데오 카세트는 이젝트(eject)되어 레코드 동작은 중단된다.First, the video cassette is inserted into the VCR, and if the video cassette has a safety pin, the “high” signal is supplied to the recording safety pin (①) terminal of the microcomputer 10. In this way, the recording safety pin (①) is supplied with the "high" signal, so that the record is operated. At this time, when the recording cancel key switch SW 1 of the record cassette is in the "on" state, the base of the switching transistor Q 2 "high" signal is be applied, Further, "high" signal is is applied to the base side of the switching transistor (Q 1), the switching transistor (Q 1) and the recording safety pin (①) terminal of the microcomputer 10 ( Q 2 ) is turned off so that a “high” signal is applied to the base side of the switching transistor Q 3 . The recording pin (②), "High" signal of the terminal of the microcomputer 10 is so is applied to the base side of the switching transistor (Q 4), the switching transistor (Q 3) and (Q 4) is turned off. In this way, since both Q 3 and Q 4 are turned off, the high signal of the switching transistor Q 4 is applied to the base side of the switching transistor R 5 through the resistors R 3 and R 4 . As a result, the switching transistor Q 5 is turned on, and thus the switching transistor Q 6 is also turned on to operate the eject key switch SW 2 , so that the video cassette is ejected to stop the recording operation.
그러나 레코드 카세트의 녹화 취소 키 스윗치(SW1)가 "오프"상태가 되면, 스위칭트랜지스터(Q2)는 턴온되고, 또, 스위칭트랜지스터(Q1)는 마이콤(10)의 녹화 안전핀(1)단자의 신호가 "하이"이므로 상기 스위칭트랜지스터(Q1)는 턴오프 되므로써 스위칭 트랜지스터(Q3)의 베이스측에는 "로우"가 되어 상기 스위칭트랜지스터(Q3)는 턴온된다. 따라서 스위칭트랜지스터(Q4)의 베이스측에는 마이콤(10)의 녹화핀(2)단자의 "하이"신호가 공급되므로 상기 스위칭트랜지스터(Q4)는 턴오프된다. 이와같이 상기 스위칭트랜지스터(Q4)가 턴오프되므로 스위칭트랜지스터(Q5)의 베이스측는 "로우"가 되어 스위칭트랜지스터(Q5)와 (Q6)는 모두 턴오프된다. 이와같이 하므로써 자동으로 이젝트 키 스윗치(SW2)가 동작되지 않으므로 정상적인 레코드가 수행되는 것이다.However, when the recording cancel key switch SW 1 of the record cassette is turned “off”, the switching transistor Q 2 is turned on, and the switching transistor Q 1 is connected to the recording safety pin 1 terminal of the microcomputer 10. Since the signal is "high" the switching transistor (Q 1) is a "low" side of the base of the turn-off doemeurosseo switching transistor (Q 3) of the switching transistor (Q 3) is turned on. Therefore, since the recording pin (2) "high" signal is supplied to the terminal of the microcomputer 10 side of the base of the switching transistor (Q 4), the switching transistor (Q 4) is turned off. As described above, since the switching transistor Q 4 is turned off, the base side of the switching transistor Q 5 is “low”, so that both the switching transistors Q 5 and Q 6 are turned off. In this way, the eject key switch (SW 2 ) does not work automatically, so a normal record is performed.
이상에서와 같이 동작되는 본 고안은, 소비자의 오동작으로 인해 테이프가 레코드되는 것을 방지시켜 줌으로써 사용상 편리하도록 하였고, 또, 테이프의 정보손실을 막을 수 있는 효과가 있다.The present invention, which operates as described above, is convenient for use by preventing the tape from being recorded due to a malfunction of the consumer, and also has an effect of preventing information loss of the tape.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870022018U KR900006800Y1 (en) | 1987-12-12 | 1987-12-12 | Recording cancel circuit in VCR |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870022018U KR900006800Y1 (en) | 1987-12-12 | 1987-12-12 | Recording cancel circuit in VCR |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR890014423U KR890014423U (en) | 1989-08-10 |
| KR900006800Y1 true KR900006800Y1 (en) | 1990-07-28 |
Family
ID=19270318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019870022018U Expired KR900006800Y1 (en) | 1987-12-12 | 1987-12-12 | Recording cancel circuit in VCR |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR900006800Y1 (en) |
-
1987
- 1987-12-12 KR KR2019870022018U patent/KR900006800Y1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| KR890014423U (en) | 1989-08-10 |
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| P22-X000 | Classification modified |
St.27 status event code: A-4-4-P10-P22-nap-X000 |