KR900003087Y1 - Off timer circuit - Google Patents
Off timer circuit Download PDFInfo
- Publication number
- KR900003087Y1 KR900003087Y1 KR2019870023483U KR870023483U KR900003087Y1 KR 900003087 Y1 KR900003087 Y1 KR 900003087Y1 KR 2019870023483 U KR2019870023483 U KR 2019870023483U KR 870023483 U KR870023483 U KR 870023483U KR 900003087 Y1 KR900003087 Y1 KR 900003087Y1
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- KR
- South Korea
- Prior art keywords
- timer
- circuit
- switch
- capacitor
- 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.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
- H01H43/02—Details
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- Electronic Switches (AREA)
- Measurement Of Predetermined Time Intervals (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래의 오프 타이머 회로의 블럭도.1 is a block diagram of a conventional off timer circuit.
제2도는 본 고안의 회로도.2 is a circuit diagram of the present invention.
제3도는 본 고안에 따른 응용예를 나타낸 도면.3 is a view showing an application example according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
21 : 직류전원부 22 : 타이머 표시회로21: DC power supply 22: timer display circuit
23 : 부하단 RY1-RY2: 릴레이23: Load stage RY 1 -RY 2 : Relay
본고안은 일정시간 경과후에 전기 및 전자기기를 자동으로 오프시키는 오프 타이머 회로에 관한 것이다.This issue relates to an off timer circuit that automatically turns off electrical and electronic equipment after a period of time.
종래의 오프타이머는 태엽을 이용한 기계식 타이머나 제1도에 도시된 디지털 카운터를 이용한 전자식 타이머를 이용하였다.The conventional off-timer used a mechanical timer using a spring or an electronic timer using a digital counter shown in FIG.
그러나, 기계식인 경우 태엽과 기계 작동에 의한 소음과 부품의 마모등으로 내구성에 문제가 있었다.However, in the case of the mechanical type, there was a problem in durability due to the noise caused by the mainspring and the mechanical operation and the wear of the parts.
또한, 카운터를 사용한 경우에는 클럭발진회로(11), 카운터회로(12), 비교검출회로(13), 스위치구동회로(14), 동작상태표시회로(15) 및 제어회로(16)등의 복잡한 회로로 이루어져 구성이 복잡할 뿐만아니라 제조상 단가가 높은 문제점이 있었다.When the counter is used, the clock oscillation circuit 11, the counter circuit 12, the comparison detection circuit 13, the switch drive circuit 14, the operation state display circuit 15 and the control circuit 16 are complicated. Composed of circuits as well as complicated configuration, there was a problem in high manufacturing costs.
본 고안은 상기한 문제점을 해결하기 위해 안출된 것으로서, 스위치와 릴레이를 병렬연결하고 트랜지스터를 코일 양단에 연결하여 콘덴서 충전시 트랜지스터를 온시키므로서 릴레이구동코일의 양단전압을 강하시켜 스위치를 자동으로 오프시키는 오프타이머의 회로를 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, by connecting the switch and the relay in parallel, the transistor is connected to both ends of the coil to turn on the transistor when charging the capacitor, thereby reducing the voltage on both ends of the relay drive coil to switch off automatically It is an object of the present invention to provide an off-timer circuit.
이하에 첨부된 도면에 의거하여 본 고안의 실시예를 설명한다.Based on the accompanying drawings will be described an embodiment of the present invention.
제2도는 본 소안의 실시예에 따른 회로도를 나타낸 것이다.2 shows a circuit diagram according to an embodiment of the present invention.
직류 전원부(21)를 스위치(SW1)와 릴레이(RY1)와 저항(R1)으로 구성된 스위칭부(24)에 연결하고, 에미터가 정지된 트랜지스터(Q1)의 콜렉터를 스위칭부(24)의 저항(R1) 및 릴레이(RY1)구동코일에 각각 연결하며, 베이스를 스위치(SW3)와 제너다이오드(ZD1)에 각각 연결하고, 스위치(SW2), 릴레이(RY2), 저항(R2) 및 가변저항(VR1)으로 구성된 가변전류 제어부(25)를 스위치(SW3), 스위칭부(24), 타이어표시회로(22), 부하단(23)에 연결하며, 기준전압 설정부(26)의 제너다이오드(ZD1)를 가변전류제어부(25)의 가변저항(VR1) 및 콘덴서(C1)에 각각 연결하였다.The DC power supply unit 21 is connected to a switching unit 24 composed of a switch SW 1 , a relay RY 1 , and a resistor R 1 , and the collector of the transistor Q 1 in which the emitter is stopped is connected to the switching unit ( 24 is connected to the resistor (R 1 ) and relay (RY 1 ) driving coil, respectively, and the base is connected to the switch (SW 3 ) and the zener diode (ZD 1 ), respectively, the switch (SW 2 ) and the relay (RY 2). ), The variable current controller 25 composed of the resistor R 2 and the variable resistor VR 1 is connected to the switch SW 3 , the switching unit 24, the tire display circuit 22, and the load terminal 23. The Zener diode ZD 1 of the reference voltage setting unit 26 is connected to the variable resistor VR 1 and the capacitor C 1 of the variable current controller 25, respectively.
본 고안은 전원부(21)에 연결된 스위칭부(24)가 가변전류제어부(25)와 콘덴서(C1)의 충전특성을 이용하여 기준전압설정부(26)에서 설정된 전압보다 콘덴서(C1)의 충전전압이 높아지면 제어용 반도체소자인 트랜지스터(Q1)를 온시켜 부하단(23)에 전압을 차단하는 회로이다.The subject innovation is a switching unit 24 connected to the power supply section 21 of the adjustable current controller 25 and capacitor (C 1), a capacitor than a voltage set by the reference voltage setting unit 26 by using a charging characteristic of the (C 1) When the charging voltage is increased, the transistor Q 1 , which is a control semiconductor element, is turned on to cut off the voltage at the load terminal 23.
상기 구성된 본 고안의 동작을 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above are as follows.
먼저, 직류전원부(21)의 "+"측 단자와 접속된 스위치(SW1)를 누르면 전류가 부하단(23)에 흐름과 동시에 저항(R1)을 통해 릴레이(RY1) 구동코일에 흐르게 되므로 릴레이스 위치는 도통된다.First, when the switch SW 1 connected to the "+" side terminals of the DC power supply unit 21 is pressed, a current flows to the load terminal 23 and simultaneously flows through the resistor R 1 to the relay RY 1 driving coil. Therefore, the relay position is turned on.
이때, 스위치(SW1)가 단락상태로 되어도 릴레이(RY1)스위치가 도통상태이므로 전원은 계속해서 부하단(23)에 흐르게 된다.At this time, even if the switch SW 1 is short-circuited, the power supply continues to flow to the load stage 23 because the relay RY 1 switch is in a conductive state.
타이머의 동작스위치(SW2)를 누르면 상기한 동작과 동일하게 저항(R2)을 통해 릴레이(RY1)구동코일에 흐르게되므로 릴레이 스위치는 도통되며, 타이머표시회로(22) 및 가변저항(VR1)에 전원이 인가된다.Because pressing the operation switch (SW 2) of the timer through the same resistance (R 2) and the above-described operation relay flows in the (RY 1) driving coil relay switch is conducting, the timer display circuit 22 and a variable resistor (VR 1 ) Power is applied.
따라서, 타이머표시회로(22)는 타이머가 동작중임을 표시하고, 전원이 가변저항(VR1)을 통해 콘덴서(C1)에 충전된다. 이때, 충전시간은 가변저항(VR1)의 저항값과 콘덴서(C1)의 시정수에 의해 결정되고, 점(a)의 전위는 콘덴서(C1)가 충전됨에 따라 점점 높아진다.Thus, the timer display circuit 22 indicates that the timer is in operation, and the power is charged in the capacitor C 1 through the variable resistor VR 1 . At this time, the charging time is determined by the resistance value of the variable resistor VR 1 and the time constant of the capacitor C 1 , and the potential of the point a becomes gradually higher as the capacitor C 1 is charged.
점(a)의 전위가 제너다이오드(ZD1)의 항복전압보다 높아지면 제너다이오드(ZD1)가 도통되므로 트랜지스터(Q1)의 베이스전위는 "H"레벨이 된다. 트랜지스터(Q1)의 에미터와 콜렉터간은 도통상태가 되어 전위차는 0.2V가 된다.When the potential of the point a becomes higher than the breakdown voltage of the zener diode ZD 1 , the zener diode ZD 1 conducts, so that the base potential of the transistor Q 1 becomes HH level. The emitter and the collector of the transistor Q 1 are brought into a conductive state so that the potential difference is 0.2V.
따라서, 릴레이(RY1,RY2)스위치는 오프되고, 부하에 공급되는 전원은 차단된다. 또한, 스위치(SW1)를 통하여 전원이 공급될 때 릴레이(RY2)는 동작되지 않으므로 스위치(SW2)를 누르지 않는한 릴레이(RY2)는 동작되지 않는다. 스위치(SW3)는 전원 오프용 스위치로서 타이머의 동작에 관계없이 트랜지스터의 베이스 상태 "H"레벨로 하여 전원을 차단시켜 준다.Therefore, the relays RY 1 and RY 2 are turned off, and the power supplied to the load is cut off. In addition, a relay (RY 2) when power is supplied via the switch (SW 1) the relay (RY 2) does not operate does not press the switch (SW 2) is not operating. Switch (SW 3) to give the base as a state "H" level, the transistor cut off the power regardless of the operation of the timer as a switch for power-off.
상기한 바와 같이 스위치(SW2)를 누름과 동시에 콘덴서(C1)의 충전시간에 의해 부하단(23)에 공급되는 전원이 차단되는 시간을 지연시킬수가 있을 뿐만 아니라, 전원이 차단되는 시간은 가변저항(VR1)과 콘덴서(C1)의 시정수에 의해 가변할 수 있다.As described above, at the same time as pressing the switch SW 2 , the time for which the power supplied to the load terminal 23 is cut off by the charging time of the capacitor C 1 can be delayed, The time constant of the variable resistor VR 1 and the capacitor C 1 can be varied.
제3도는 본 고안에 따른 고류기기의 응용도를 나타낸 것이다.Figure 3 shows the application of the high-altitude device according to the present invention.
31은 정류회로, 32는 부하회로 및 33은 본 고안의 타이머 회로를 각각 나타낸다.31 denotes a rectifier circuit, 32 a load circuit and 33 a timer circuit of the present invention.
본 고안은 직류전원을 사용하는 전자기기에 전원이 차단되는 시간을 조정할 수 있는 회로로서, 종래의 기계식 타이머에 비해 내구성과 신뢰성이 높을 뿐만 아니라 종래의 전자식 타이머의 복잡한 회로가 필요하지 않으므로 구성이 간단하고, 고장율이 낮으며, 가격을 절감시킬 수 있는 이점이 있다.The present invention is a circuit that can adjust the time when the power is cut off to the electronic device using a DC power supply, durability and reliability compared to the conventional mechanical timer, and because the complicated circuit of the conventional electronic timer is not necessary, the configuration is simple And, the failure rate is low, there is an advantage that can reduce the price.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870023483U KR900003087Y1 (en) | 1987-12-29 | 1987-12-29 | Off timer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870023483U KR900003087Y1 (en) | 1987-12-29 | 1987-12-29 | Off timer circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR890014777U KR890014777U (en) | 1989-08-11 |
| KR900003087Y1 true KR900003087Y1 (en) | 1990-04-14 |
Family
ID=19270917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019870023483U Expired KR900003087Y1 (en) | 1987-12-29 | 1987-12-29 | Off timer circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR900003087Y1 (en) |
-
1987
- 1987-12-29 KR KR2019870023483U patent/KR900003087Y1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| KR890014777U (en) | 1989-08-11 |
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