KR900004789Y1 - Circuit for returning head automatically when power turned off - Google Patents

Circuit for returning head automatically when power turned off Download PDF

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Publication number
KR900004789Y1
KR900004789Y1 KR2019860019832U KR860019832U KR900004789Y1 KR 900004789 Y1 KR900004789 Y1 KR 900004789Y1 KR 2019860019832 U KR2019860019832 U KR 2019860019832U KR 860019832 U KR860019832 U KR 860019832U KR 900004789 Y1 KR900004789 Y1 KR 900004789Y1
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KR
South Korea
Prior art keywords
head
power
motor
voltage
disk
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KR2019860019832U
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Korean (ko)
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KR880013451U (en
Inventor
장세영
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주식회사 금성사
구자학
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Priority to KR2019860019832U priority Critical patent/KR900004789Y1/en
Publication of KR880013451U publication Critical patent/KR880013451U/en
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Publication of KR900004789Y1 publication Critical patent/KR900004789Y1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
    • G11B21/20—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks

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  • Rotational Drive Of Disk (AREA)

Abstract

내용 없음.No content.

Description

전원차단시 헤드 자동 복귀회로Head auto return circuit when power off

첨부 도면은 본 고안의 헤드 자동 복귀 회로도이다.The accompanying drawings are the head automatic return circuit diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 스핀들 모타 구동부 2 : 정류기1: Spindle Motor Drive 2: Rectifier

3 : 제어부 4 : 비교기3: control unit 4: comparator

5 : 헤드 모타 구동부 6 : 헤드 복귀 제어부5: head motor drive unit 6: head return control unit

Vref : 기준전압 Vln: 전원단자Vref: Reference Voltage Vl n : Power Supply Terminal

M1: 스핀들모타 M2: 헤드모타M 1 : Spindle Motor M 2 : Head Motor

본 고안은 하드 디스크 드라이버에 있어서, 디스크에 데이타 신호를 기록 및 재생시키는 헤드를 전원 차단시 디스크의 착륙영역(landing zone)으로 원상복귀 시킴은 물론 헤드가 원상복귀되는 속도를 제한할 수 있게한 전원차단시 헤드 자동 복귀회로에 관한 것이다.According to the present invention, a power supply capable of restoring the head returning and restoring the data signal to the disk to the landing zone of the disk when the power is cut off, as well as limiting the speed at which the head returns to the disk. It relates to a head automatic return circuit when shut off.

일반적으로 하드 디스크 드라이버에 사용하는 디스크는 중앙부에 데이타 신호의 기록 및 재생이 이용되지 않는 착륙영역이 있고, 착륙영역의 외측으로는 데이타 신호를 기록 및 재생시키는데 사용하는 데이타 영역이 있다.In general, a disk used for a hard disk driver has a landing area in the center of which data recording and reproducing is not used, and a data area used for recording and playing data signals outside the landing area.

그리고, 하드 디스크 드라이버에 전원이 인가되어 스핀들 모타가 구동되는 초기시간에는 스핀들 모타에 충분한 가속이 붙지 못하여 디스크 천천히 회전하게 되고, 헤드는 스핀들 모타에 충분한 가속도가 붙기 전에는 디스크에 접촉된 상태를 유지하게 되므로 디스크와 헤드 사이에 많은 마찰이 발생하여 디스크의 표면을 상하게 되나, 종래의 하드 디스크 드라이버는 헤드가 디스크의 데이타 영역에서 데이타 신호를 기록 및 재생하는 상태에서 전원을 차단시키면, 그 헤드가 데이타 영역에 계속 위치하게 되어 전원이 인가되는 초기 시간에 디스크의 데이타 영역의 헤드와의 마찰에 의하여 손상되는 결함이 있었다.Then, when the power is supplied to the hard disk drive and the spindle motor is driven at an initial time, the disk motor rotates slowly due to insufficient acceleration of the spindle motor. Therefore, a lot of friction occurs between the disk and the head, which damages the surface of the disk. However, in the conventional hard disk driver, when the head cuts off the power while the head is recording and reproducing the data signal in the data area of the disk, the head becomes the data area. In the initial time when the power was applied, there was a defect that was damaged by friction with the head of the data area of the disk.

본 고안은 이와 같은 종래의 결함을 감안하여, 전원을 차단시키면, 헤드를 착륙영역으로 이동시켜 스핀들 모타가 구동되는 초기시간에 헤드와의 마찰에 의해 데이타 영역이 손상되는 것을 방지하게 안출한 것으로, 이를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.In consideration of such a conventional defect, the present invention is designed to prevent the data area from being damaged by friction with the head at an initial time when the power is turned off, and the head is moved to the landing area to drive the spindle motor. This will be described in detail with reference to the accompanying drawings.

첨부된 도면에 도시한 바와 같이 스핀들 모타 구동부(1)의 출력전압에 따라 구동되는 스핀들 모타(M1)의 역기전력을 정류하는 다이오드(D1-D3) 및 콘덴서(C1)로된 정류기(2)와, 상기 정류기(2)의 출력전압을 제어하는 트랜지스터(TR1, TR2) 및 저항(R1, R2)으로 된 제어부(3)와, 기준전압(Vref)과 전원전압(Vln)을 비교하여 전원의 차단을 검출하는 비교기(4)와, 상기 비교기(4)의 출력전압에 따라 릴레이(RL1)를 제어하여 상기 제어부(3) 또는 헤드모타구동부(5)의 출력전압이 헤드모타(M2)에 인가되게 하는 트랜지스터(TR3) 및 다이오드(D3), 저항(R3, R4)으로된 헤드복귀제어부(6)로 구성한 것으로, 상기에서 릴레이스위치(RL11)(RL12)는 릴레이(RL1)가 구동될 때 가동단자가 일측고정단자(a1)(a2)에 각기 단락되고, 전원전압(VlS)은 하드 디스크 드라이버에 전원이 인가되었을 경우에 기준전압(Vref)보다 높게 설정하며, 도면의 설명중 미설명 부호 Vcc는 전원단자이다.As shown in the accompanying drawings, a rectifier comprising a diode (D 1 -D 3 ) and a condenser (C 1 ) rectifying the counter electromotive force of the spindle motor (M 1 ) driven according to the output voltage of the spindle motor driving unit ( 2), a control unit 3 comprising transistors TR 1 and TR 2 and resistors R 1 and R 2 for controlling the output voltage of the rectifier 2, a reference voltage Vref and a power supply voltage Vl. n ) to compare the comparator 4 for detecting the interruption of the power supply and the relay RL 1 according to the output voltage of the comparator 4 to control the output voltage of the controller 3 or the head motor driver 5. It is composed of a head return control unit 6 composed of a transistor TR 3 , a diode D 3 , and resistors R 3 , R 4 , which are applied to the head motor M 2 , and the relay switch RL 1 described above. 1) (RL 1 2) is a hard disk driver relay (the one side fixed terminals when the movable terminal driving RL 1) (a 1) (and each paragraph on a 2), the power supply voltage (Vl S) Reference numeral Vcc of the set to be higher than a voltage (Vref) based on when the power is turned on, and the description of the drawings is a power supply terminal.

이와 같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effect of the present invention configured in this way in detail as follows.

하드 디스크 드라이버에 전원을 인가하여 전원단자(Vcc)에 전원이 인가됨과 아울러 기준전압(Vref) 및 전원전압(VlS)이 비교기(4)에 입력되면, 비교기(4)의 출력단자에는 고전위 신호가 출력되어 저항(R4)을 통해 트랜지스터(TR3)의 베이스에 인가되므로 트랜지스터(TR3)가 온되어 릴레이(RL1)가 구동되고, 이에 따라 릴레이스위치(RL11)(RL12)의 가동단자가 일측 고정단자(a1)(a2)에 각기 단락되므로 헤드 모타 구동부(5)의 출력전압의 릴레이스위치(RL11)(RL12)를 통해 헤드모타(M2)에 인가되어 헤드모타(M2)는 헤드모타구동부(5)의 출력전압에 따라 정방향 및 역방향으로 구동되면서 헤드를 이동시키게 되고, 이때 스핀들모타 구동부(1)는 일정전압을 출력하여 스핀들 모타가 구동되면서 디스크를 회전시킴과 아울러 그 스핀들 모타(M1)의 역기전력이 다이오드(D1-D3)를 통해 정류되어 콘덴서(C1)에 충전된다.When power is supplied to the power terminal Vcc by applying power to the hard disk driver, and the reference voltage Vref and the power voltage Vl S are input to the comparator 4, the output terminal of the comparator 4 has a high potential. the signal is output is applied to the base of the transistor (TR 3) via a resistor (R 4), so the transistor (TR 3) is turned on relay is driven (RL 1), Accordingly, the relay switch (RL 1 1) (RL 1 Since the movable terminal of 2 ) is short-circuited to the fixed terminal (a 1 ) (a 2 ) on one side, the head motor (M 2 ) through the relay switch (RL 1 1) (RL 1 2) of the output voltage of the head motor driving unit (5). Is applied to the head motor (M 2 ) is driven in the forward and reverse directions according to the output voltage of the head motor driving unit 5 to move the head, the spindle motor driving unit 1 outputs a constant voltage to the spindle motor rotating the disk drive and Sikkim as well as the counter electromotive force of the spindle motor (M 1) Is rectified through the odd (D 1 -D 3) is charged in the capacitor (C 1).

이와 같은 상태에서 하드 디스크 드라이버에 인가되는 전원을 차단하여 전원전압(VlS)이 입력되지 않으면, 비교기(4)는 저전위 신호를 출력하여 트랜지스터(TR3)가 오프되고, 릴레이(RL1)가 구동되지 못하므로 릴레이스위치(RL11)(RL12)의 가동단자가 타측고정단자(b1)(b2)에 단락되고, 이에 따라 콘덴서(C1)의 충전전압이 저항(R1)을 통해 트랜지스터(TR1)의 베이스에 인가되어 그를 온시킴과 아울러 그 콘덴서(C1)의 충전전압이 트랜지스터(TR1)를 통해 트랜지스터(TR2)의 베이스에 인가되어 그를 온시키게 되므로 콘덴서(C1)의 충전전압이 저항(R1) 및 트랜지스터(TR2), 릴레이스위치(RL11), 헤드모타(N2), 릴레이스위치(RL12)를 통해 접지로 흐르면서 헤드모타(M2)를 구동시켜 헤드모타(M2)는 헤드를 디스크의 착륙영역으로 이동시키게 되고, 이때 헤드모타(M2)에 흐르는 전류를 저항(R1)의 값으로 조절하여 헤드모타(M2)가 헤드를 착륙영역으로 이동시키는 속도를 조절 할 수 있고, 콘덴서(C1)의 용량은 전원차단시 헤드모타(M2)가 헤드를 착륙영역으로 이동 시킬 수 있는 충분한 전압이 충전되게 설정한다.Thus, if by the same conditions as cut off the power applied to the hard disk driver supply voltage (Vl S) is not input, the comparator 4 is a transistor (TR 3) off to output a low potential signal, a relay (RL 1) Is not driven, the movable terminal of the relay switch RL 1 1 (RL 1 2 ) is short-circuited to the other fixed terminal (b 1 ) (b 2 ), so that the charging voltage of the capacitor (C 1 ) is resistance (R). 1 ) is applied to the base of the transistor TR 1 to turn it on, and the charging voltage of the capacitor C 1 is applied to the base of the transistor TR 2 through the transistor TR 1 to turn it on. The charging voltage of the capacitor (C 1 ) flows to ground through the resistor (R 1 ) and the transistor (TR 2 ), the relay switch (RL 1 1), the head motor (N 2 ), and the relay switch (RL 1 2). drives the (M 2), and thereby the head motor (M 2) moves the head in a landing area of the disk, the Head adjustment to the value of the resistance (R 1) of the current flowing to the motor (M 2) and has a head motor (M 2) to control the speed of moving the head in a landing zone, the capacitance of the capacitor (C 1) is a power When shut off, the head motor (M 2 ) is set to charge enough voltage to move the head to the landing area.

이상에서 설명한 바와 같이 본 고안은 전원차단시 헤드를 착륙영역으로 이동시키게 되므로 하드 디스크 드라이버에 전원을 인가하여 구동시키는 초기시간에 디스크와 헤드간의 마찰에 의하여 디스크의 데이타 영역이 손상되는 것을 방지하는 효과가 있다.As described above, the present invention moves the head to the landing area when the power is turned off, thereby preventing the data area of the disk from being damaged by friction between the disk and the head at the initial time of applying power to the hard disk driver. There is.

Claims (1)

스핀들 모타(M1)의 역기전력을 정류하는 정류기(2)와, 상기 정류기(2)의 출력전압을 제어하는 제어부(3)와, 기준전압(Vref) 및 전원전압(VlS)을 비교하여 전원차단을 검출하는 비교기(4)와, 상기 비교기(4)의 출력전압에 따라 릴레이(RL1)를 제어하여 상기 제어부(3) 또는 헤드모타 구동부(5)의 출력전압이 헤드모타(M2)에 인가되게 하는 헤드복귀제어부(6)로 구성하여 전원차단시 헤드를 디스크의 착륙영역으로 이동시키게 함을 특징으로 하는 전원 차단시 헤드 자동 복귀회로.The rectifier 2 rectifies the counter electromotive force of the spindle motor M 1 , the controller 3 which controls the output voltage of the rectifier 2, and compares the reference voltage Vref and the power supply voltage V S with a power supply. The comparator 4 for detecting the interruption and the relay RL 1 are controlled according to the output voltage of the comparator 4 so that the output voltage of the control unit 3 or the head motor driving unit 5 is the head motor M 2 . And a head return control unit (6) to be applied to the head automatic return circuit when the power is cut off, wherein the head is moved to the landing area of the disk when the power is cut off.
KR2019860019832U 1986-12-11 1986-12-11 Circuit for returning head automatically when power turned off KR900004789Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019860019832U KR900004789Y1 (en) 1986-12-11 1986-12-11 Circuit for returning head automatically when power turned off

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019860019832U KR900004789Y1 (en) 1986-12-11 1986-12-11 Circuit for returning head automatically when power turned off

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KR880013451U KR880013451U (en) 1988-08-30
KR900004789Y1 true KR900004789Y1 (en) 1990-05-31

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KR2019860019832U KR900004789Y1 (en) 1986-12-11 1986-12-11 Circuit for returning head automatically when power turned off

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