KR0155094B1 - Anti-resonating structure of head drum assembly - Google Patents

Anti-resonating structure of head drum assembly Download PDF

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Publication number
KR0155094B1
KR0155094B1 KR1019950032801A KR19950032801A KR0155094B1 KR 0155094 B1 KR0155094 B1 KR 0155094B1 KR 1019950032801 A KR1019950032801 A KR 1019950032801A KR 19950032801 A KR19950032801 A KR 19950032801A KR 0155094 B1 KR0155094 B1 KR 0155094B1
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KR
South Korea
Prior art keywords
drum
head
assembly
notch
head drum
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KR1019950032801A
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Korean (ko)
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KR970017220A (en
Inventor
조부현
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배순훈
대우전자주식회사
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Priority to KR1019950032801A priority Critical patent/KR0155094B1/en
Publication of KR970017220A publication Critical patent/KR970017220A/en
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Publication of KR0155094B1 publication Critical patent/KR0155094B1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
    • G11B33/08—Insulation or absorption of undesired vibrations or sounds
    • 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
    • G11B15/60—Guiding record carrier
    • G11B15/61—Guiding record carrier on drum, e.g. drum containing rotating heads
    • 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
    • G11B15/60—Guiding record carrier
    • G11B15/66—Threading; Loading; Automatic self-loading
    • G11B15/665—Threading; Loading; Automatic self-loading by extracting loop of record carrier from container
    • G11B15/6653—Threading; Loading; Automatic self-loading by extracting loop of record carrier from container to pull the record carrier against drum

Abstract

본 발명은 브이씨알 헤드드럼조립체의 공진방지구조에 관한 것으로, 특히 하부드럼의 베어링사이에 위치되는 헤드드럼의 회전축에 노치를 형성하여 고유진동수를 이동시킴으로써 공진으로 발생되는 화면불량을 제거시킨 헤드드럼조립체의 공진방지구조에 관한 것이다.The present invention relates to an anti-resonance structure of a BC-Rial head assembly, and particularly, a head drum which eliminates a screen defect caused by resonance by moving a natural frequency by forming a notch on a rotation axis of a head drum positioned between bearings of a lower drum. An anti-resonance structure of an assembly is provided.

Description

헤드드럼조립체의 공진방지구조Anti-Resonance Structure of Head Drum Assembly

제1도는 종래의 헤드드럼조립체의 단면도.1 is a cross-sectional view of a conventional head drum assembly.

제2도의 (a)는 종래의 방진판의 정면도이고, (b)는 이의 측면도.(A) of FIG. 2 is a front view of a conventional dustproof plate, and (b) is a side view thereof.

제3도는 본 발명의 헤드드럼조립체의 단면도.3 is a cross-sectional view of the head drum assembly of the present invention.

제4도는 본 발명의 드럼축의 노치를 구하는 모형도.4 is a schematic view for finding the notch of the drum shaft of the present invention.

제5도는 시험테이프로 작동시 드럼모터의 공진에 의해 발생되는 화면의 불량상태를 보여주는 상태도.5 is a state diagram showing a bad state of the screen generated by the resonance of the drum motor when operating with the test tape.

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

20 : 상부드럼 24 : 회전축20: upper drum 24: rotation axis

25 : 노치 30 : 하부드럼25: notch 30: lower drum

31 : 베어링 34 : 드럼모터 회전자31: bearing 34: drum motor rotor

본 발명은 브이씨알 헤드드럼조립체의 공진방지구조에 관한 것으로, 특히 하부드럼의 베어링 사이에 위치되는 헤드드럼의 회전축에 노치를 형성하여 고유진동수를 이동시킴으로써 공진으로 발생되는 화면불량을 제거시킨 헤드드럼조립체의 공진방지구조에 관한 것이다.The present invention relates to an anti-resonance structure of a BC-AL head drum assembly, and more particularly, a head drum in which a screen defect caused by resonance is eliminated by moving a natural frequency by forming a notch on a rotation axis of a head drum positioned between bearings of a lower drum. An anti-resonance structure of an assembly is provided.

제1도에 도시된 바와같이, 일반적으로 헤드드럼조립체(a)는 상부드럼(b)과 하부드럼(c)으로 구성되었다.As shown in FIG. 1, the head drum assembly (a) generally consists of an upper drum (b) and a lower drum (c).

상부드럼(b)은 테이프와 접촉되어 신호를 읽는 헤드(d)가 취부되어 있고, 상기 헤드(d)로부터 출력된 출력신호를 전달받는 로터리 트랜스 회전자(e)가 상기 상부드럼(b) 저면 중앙에 접착되어 있으며, 회전축(h)이 결합된 플랜지(g)가 중앙에 고정되었다.The upper drum (b) is fitted with a head (d) reading a signal in contact with the tape, the rotary transformer rotor (e) receiving the output signal output from the head (d) is the bottom of the upper drum (b) A flange g attached to the center and a rotating shaft h is fixed to the center.

메인베이스에 고정되는 하부드럼(c)은 상부드럼(b)이 회전되도록 중앙 상,하에 두개의 베어링(i)이 취부되었으며, 로터리 트랜스 고정자(f)가 중앙 저면에 고정되었고, 하면에는 드럼모터 고정자(j)가 고정되었으며, 상부드럼(b)에 조립된 드럼모터 회전축(h)이 상기 베어링(i)에 회전되게 결합되었고, 드럼모터 고정자(j) 하부로 돌출된 회전축(h)에 드럼모터 회전자(k)가 결합되었으며, 상기 드럼모터 회전자(k)의 하부에는 방진판(m)이 나사(l)로 고정되었다.The lower drum (c) fixed to the main base has two bearings (i) mounted at the top and bottom of the center so that the upper drum (b) is rotated, and the rotary transformer stator (f) is fixed to the bottom of the center and the drum motor at the bottom thereof. The stator j is fixed, the drum motor rotating shaft h assembled to the upper drum b is rotatably coupled to the bearing i, and the drum is attached to the rotating shaft h protruding below the drum motor stator j. The motor rotor (k) is coupled, and the dustproof plate (m) is fixed to the lower portion of the drum motor rotor (k) with a screw (l).

제2도의 (a)에 도시된 바와같이, 방진판(m)은 관성모멘트를 변화시켜 고유진동수를 이동시킴으로써 공진을 방지하는 것으로서, 상기 방진판(m)은 중앙에 축결합공(n)이 형성되어 있고, 이의 둘레에는 나사결합공(o)이 형성되어 있으며, (b)에 측면도로 도시된 바와같이 방진판(m)은 관성플레이트(INERTIA PLATE)(p)와, 양면접착제에 의해 상기 관성플레이트(p)에 부착되는 얇은 와셔(LUMIRROR WASHER)(q)로 구성되어 있다.As shown in (a) of FIG. 2, the anti-vibration plate (m) is to prevent resonance by changing the moment of inertia to move the natural frequency, and the anti-vibration plate (m) has a axial coupling hole (n) in the center thereof. And a screw coupling hole (o) is formed in the circumference thereof, and as shown in side view in (b), the dustproof plate (m) is formed by the inertial plate (INERTIA PLATE) (p) and the double-sided adhesive. It consists of a thin washer (Q) attached to the inertial plate (p).

상기와 같이 조립된 헤드드럼조립체(a)는 드럼모터 회전자(k)가 회전되면 이에 회전축(h)으로 연결된 상부드럼(b)도 회전되고, 상기 상부드럼(b)에 취부된 헤드(d)가 테이프에 접촉되어 읽은 신호를 로터리 트랜스 회전자(e)에 전달하고, 상기 로터리 트랜스 회전자(e)에 전달된 신호는 로터리 트랜스 고정자(F)를 통하여 프리앰프로 전달된다.The head drum assembly (a) assembled as described above, when the drum motor rotor (k) is rotated, the upper drum (b) connected to the rotating shaft (h) is also rotated, and the head (d) mounted on the upper drum (b) ) And the read signal is transmitted to the rotary transformer rotor (e), the signal transmitted to the rotary transformer rotor (e) is transmitted to the preamplifier through the rotary transformer stator (F).

그러나, 상기와 같이 구성되어 조립된 종래의 헤드드럼조립체(a)는 공진을 방지하기 위하여 드럼모터 회전자(k) 저면에 방진판(m)을 추가함으로써 부품수 및 작업공수가 증가됨은 물론 이에따라 제조비용도 증가되는 문제점이 있었다.However, the conventional head drum assembly (a) constructed and assembled as described above increases the number of parts and workmanship by adding an anti-vibration plate (m) to the bottom of the drum motor rotor (k) to prevent resonance. There was also a problem that the manufacturing cost increases.

본 발명은 상기의 이와같은 문제점을 해소시키기 위하여 안출된 것으로서, 헤드드럼조립체의 회전축에 노치를 형성하여 공진을 방지함으로써 부품감소효과 및 작업공수의 단축효과를 가짐은 물론 제조비용감소효과를 갖는 헤드드럼조립체의 공진방지구조를 제공하는 것이 주목적이다.The present invention has been made in order to solve the above problems, by forming a notch in the rotating shaft of the head drum assembly to prevent resonance, the head having the effect of reducing parts and shortening the labor cost as well as reducing the manufacturing cost It is a primary object to provide an anti-resonance structure of the drum assembly.

상기의 이와같은 목적은, 본 발명의 헤드드럼조립체의 회전축에 노치를 형성함으로써, 즉 하부드럼의 베어링 사이에 위치되는 소정부분에 노치를 형성함으로써 달성된다.This object is achieved by forming a notch in the axis of rotation of the head drum assembly of the present invention, ie by forming a notch in a predetermined portion located between the bearings of the lower drum.

이하, 본 발명의 구성을 첨부도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

제3도는 본 발명의 헤드드럼조립체(10)의 단면도로서, 상부드럼(20)에 헤드(21)가 나사(22)로 고정되어 있고, 플랜지(23)에 결합된 회전축(24)이 상부드럼(20)에 고정되어 있으며, 상기 회전축(24)에는 노치(25)가 형성되어 있다.3 is a cross-sectional view of the head drum assembly 10 of the present invention, in which the head 21 is fixed to the upper drum 20 with a screw 22, and the rotating shaft 24 coupled to the flange 23 is the upper drum. It is fixed to the 20, the notch 25 is formed in the rotating shaft 24.

상기 노치(25)는 베어링(31) 사이에 위치되는 회전축(24)의 둘레에 형성되어 있다.The notch 25 is formed around the rotational shaft 24 located between the bearings 31.

상부드럼(20) 중앙에는 로터리 트랜스 회전자(26)가 접착되어 고정되어 있다.In the center of the upper drum 20, a rotary transformer rotor 26 is bonded and fixed.

하부드럼(30)은 상부드럼(20)이 회전되도록 중앙 상,하에 두개의 베어링(31)이 취부되었고, 로터리 트랜스 고정자(32)가 중앙 저면에 고정되었으며, 하면에는 드럼모터 고정자(33)가 피씨비에 고정되었고, 상기 베어링(31)으로 상부드럼(20)의 플랜지(23)에 조립된 회전축(24)이 결합되어 상기 피씨비 하부로 돌출되었으며, 상기 돌출된 회전축(24)에 드럼모터 회전자(34)가 결합되었다.The lower drum 30 has two bearings 31 mounted on the top and bottom of the upper drum 20 so that the upper drum 20 is rotated, the rotary transformer stator 32 is fixed to the bottom of the center, and the drum motor stator 33 is disposed on the bottom of the lower drum 30. Fixed to the PCB, the rotating shaft 24 assembled to the flange 23 of the upper drum 20 by the bearing 31 is coupled to protrude to the lower portion of the PC, the drum motor rotor on the protruding rotating shaft 24 (34) was combined.

제4도에 모형도로 도시된 바와같이, 회전축(24)의 노치(25) 위치는As shown in the schematic diagram in FIG. 4, the position of the notch 25 of the rotating shaft 24 is

I2 × b = I1 × a, a + b = ℓI2 × b = I1 × a, a + b = ℓ

의 식으로 구할 수 있다.It can be obtained by

여기에서 I1은 상부드럼(20)과 플랜지(23)의 관성모멘트이고, I2는 드럼모터 회전자(34)의 관성모멘트이며, ℓ은 플랜지(23) 하면에서 예압보스(35)상면까지의 거리이다.Where I1 is the moment of inertia of the upper drum 20 and the flange 23, I2 is the moment of inertia of the drum motor rotor 34, ℓ is the distance from the lower surface of the flange 23 to the upper surface of the preload boss 35 to be.

관성모멘트의 비(I2/I1)를 K라 하면 a=Kℓ/(1+k) 또는 b=ℓ/(1+K)이다.If the ratio of the moment of inertia (I2 / I1) is K, then a = Kl / (1 + k) or b = l / (1 + K).

즉, 예압보스(35)상면으로부터 노치(25)까지의 거리는 전체길이(ℓ)를 관성모멘트의 비(K)에 1을 더한 값으로 나누어주면 구해진다.That is, the distance from the upper surface of the preload boss 35 to the notch 25 is obtained by dividing the total length 1 by the value of 1 plus the ratio K of the moment of inertia.

이하, 본 발명의 작용,효과를 첨부도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, the operation and effects of the present invention will be described in detail with reference to the accompanying drawings.

본 발명의 헤드드럼조립체는 상부드럼(20)에 헤드(21)를 나사(22)로 고정시키고, 로터리 트랜스 회전자(26)를 상부드럼(20)의 중앙에 위치시킨다.In the head drum assembly of the present invention, the head 21 is fixed to the upper drum 20 with a screw 22, and the rotary transformer rotor 26 is positioned at the center of the upper drum 20.

한편, 메인베이스에 고정되는 하부드럼(30)에는 로터리 트랜스 고정자(32)를 중앙 저면에 고정시키고, 드럼모터 고정자(33)를 고정시킨 피씨비를 하면에 고정시킨다음 하부드럼(30)에 취부된 베어링(31)에 상부드럼(20)의 회전축(24)을 압입시키면 상기 회전축(24)이 드럼모터 고정자(33) 하부로 돌출된다. 이와같이 돌출된 회전축(24)에 드럼모터 회전자(34)를 끼워서 나사로 조이면 상부드럼(20)과 하부드럼(30)의 조립이 완료된다.On the other hand, the lower drum (30) fixed to the main base to fix the rotary transformer stator (32) to the bottom of the center, fixed the PCB to the drum motor stator (33) fixed to the lower drum 30 is attached to When the rotary shaft 24 of the upper drum 20 is pressed into the bearing 31, the rotary shaft 24 protrudes below the drum motor stator 33. When the drum motor rotor 34 is inserted into the protruding rotation shaft 24 and tightened with screws, the assembly of the upper drum 20 and the lower drum 30 is completed.

상기와 같이 조립된 드럼모터 회전자(34)가 회전되면 이에 회전축(24)으로 연결된 상부드럼(20)도 회전되고, 상기 상부드럼(20)에 취부된 헤드(21)가 테이프에 접촉되어 읽은 신호를 트랜스 회전자(26)에 전달하고, 상기 로터리 트랜스 회전자(26)에 전달된 신호는 로터리 트랜스 고정자(32)를 통하여 프리앰프로 전달된다.When the drum motor rotor 34 assembled as described above is rotated, the upper drum 20 connected to the rotating shaft 24 is also rotated, and the head 21 mounted on the upper drum 20 contacts and reads the tape. The signal is transmitted to the transformer rotor 26, and the signal transmitted to the rotary transformer rotor 26 is transmitted to the preamplifier through the rotary transformer stator 32.

이와같이 작동되는 헤드드럼조립체(10)에 공진이 발생되는지를 시험하기 위하여 시험테이프를 넣어 작동시켰을때, 제5도에 도시된 바와같이 헤드드럼조립체에 공진이 발생하는 경우 화면에 나타나는 다수의 경계선은 수직선으로 나타나지 않고 곡선형태로 나타난다.When the test tape is inserted and operated to test whether the resonance occurs in the head drum assembly 10 operated as described above, when the resonance occurs in the head drum assembly as shown in FIG. It does not appear as a vertical line but as a curved line.

상기와 같이 구성되어 작동되는 본 발명의 헤드드럼조립체는 관성플레이트(INERTIA PLATE)(p)와, 양면접착제에 의해 상기 관성플레이트(p)에 부착되는 얇은 와셔(LUMIRROR WASHER)(q)로 구성되어 있는 방진판(m)을 사용하여 공진을 방지하는 종래의 방식과 달리 회전축(24)의 소정위치에 노치(25)를 형성하여 고유진동수를 이동시켜 화면불량을 초래하는 공진을 방지함으로써 부품감소 효과는 물론 조립작업의 단순효과를 갖게되어 제조비용의 감소효과를 갖는 유용한 것이다.The head drum assembly of the present invention configured and operated as described above is composed of an inertial plate (INERTIA PLATE) (p) and a thin washer (LUMIRROR WASHER) (q) attached to the inertial plate (p) by a double-sided adhesive. Unlike the conventional method of preventing resonance by using a vibration damping plate (m), a notch 25 is formed at a predetermined position of the rotating shaft 24 to move the natural frequency to prevent resonance that causes screen defects. Of course, it is useful to have a simple effect of the assembly operation to reduce the manufacturing cost.

Claims (2)

베어링(31)이 취부되어 있고, 저면에 드럼모터의 회전자(34)가 취부되어 있는 하부드럼(30)과; 저면에 헤드(21)가 고정되어 있고, 상기 하부드럼(30)의 베어링(31)에 회동되게 플랜지(23)에 고정된 회전축(24)이 결합되어 있는 상부드럼(20)으로 구성된 헤드드럼조립체(10)에 있어서, 상기 회전축(24)의 둘레에 공진을 방지하는 노치(25)가 형성되어 있는 것을 특징으로 하는 헤드드럼조립체의 공진방지구조.A lower drum 30 having a bearing 31 mounted thereon and a rotor 34 of a drum motor mounted thereon; A head drum assembly composed of an upper drum 20 having a head 21 fixed to a bottom surface thereof and a rotating shaft 24 fixed to a flange 23 coupled to a bearing 31 of the lower drum 30 coupled thereto. The anti-resonance structure of a head drum assembly according to (10), wherein a notch (25) for preventing resonance is formed around the rotation shaft (24). 제1항에 있어서, 예압보스(35)상면으로부터 노치(25)까지의 거리(b)는 전체길이(ℓ; 플랜지(23)하면으로부터 예압보스(35)상면까지의 거리)를 관성모멘트의 비(K=I2/I1; I2는 드럼모터 회전자(34)의 관성모멘트이고, I1은 상부드럼(20)과 플랜지(23)의 관성모멘트임)에 1을 더한 값으로 나누어서 구해지는 것을 특징으로 하는 헤드드럼조립체의 공진방지구조.The distance b from the upper surface of the preload boss 35 to the notch 25 is equal to the total length (l; the distance from the lower surface of the flange 23 to the upper surface of the preload boss 35). (K = I 2 / I1; I 2 is the moment of inertia of the drum motor rotor 34, and I 1 is the moment of inertia of the upper drum 20 and the flange 23) divided by the value of 1 plus. Anti-resonance structure of the head drum assembly, characterized in that.
KR1019950032801A 1995-09-29 1995-09-29 Anti-resonating structure of head drum assembly KR0155094B1 (en)

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