KR20040084579A - Technology of Magnetic Field Reduction for Electric Energy/Acoustic Energy Transducer - Google Patents

Technology of Magnetic Field Reduction for Electric Energy/Acoustic Energy Transducer Download PDF

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Publication number
KR20040084579A
KR20040084579A KR1020030019742A KR20030019742A KR20040084579A KR 20040084579 A KR20040084579 A KR 20040084579A KR 1020030019742 A KR1020030019742 A KR 1020030019742A KR 20030019742 A KR20030019742 A KR 20030019742A KR 20040084579 A KR20040084579 A KR 20040084579A
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KR
South Korea
Prior art keywords
magnetic field
electric energy
sound
energy
acoustic
Prior art date
Application number
KR1020030019742A
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Korean (ko)
Inventor
배장환
Original Assignee
배장환
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Application filed by 배장환 filed Critical 배장환
Priority to KR1020030019742A priority Critical patent/KR20040084579A/en
Publication of KR20040084579A publication Critical patent/KR20040084579A/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/023—Screens for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

PURPOSE: A method for reducing magnetic field of an electric energy/sound energy converter is provided to reduce the high density of the magnetic field by improving a structure of the electric energy/sound energy converter. CONSTITUTION: A magnetic circuit is formed with a front plate, a rear plate(B), and a permanent magnet installed therebetween. A moving coil(D) is inserted into a gap of an opening part between the rear plate and the front plate. A vibration plate(G) is adhered on the moving coil. The vibration plate is adhered to a spacer(E) which is fixed to a frame having a sound output hole. A dust cover and a sound shielding member are used for protecting the vibration plate and prevent permeation of magnetic materials.

Description

전기에너지/음향에너지 변환기에서의 자기장 저감기술 {Technology of Magnetic Field Reduction for Electric Energy/Acoustic Energy Transducer}Magnetic Field Reduction Technology in Electric / Acoustic Energy Converters {Technology of Magnetic Field Reduction for Electric Energy / Acoustic Energy Transducer}

발명은 음향기기에서 출력되는 전기에너지를 음향에너지로 변환하는 전기에너지/음향에너지 변환기에 있어 영구자석으로 인하여 형성되는 높은 밀도의 자기장이 음향출력 방향에 형성되도록 되어 있는 것을 음향출력의 반대방향으로 전환하여 음향출력 방향의 자기장을 저감하는 기술에 관한 것이다.The present invention converts the high density magnetic field generated by the permanent magnet to be formed in the sound output direction in the opposite direction of the sound output in the electric energy / acoustic energy converter that converts the electrical energy output from the sound equipment into acoustic energy. It relates to a technique for reducing the magnetic field in the sound output direction.

음향기기에서 출력되는 전기 에너지는 사람이 소리로 듣기 위하여 전기에너지/음향에너지 변환기에 의하여 음향으로 변환되어야 한다.The electrical energy output from the sound equipment must be converted to sound by an electrical energy / acoustic energy converter for human hearing.

도 1에서, 지금까지 알려진 통상의 전기에너지/음향에너지 변환기는 후면 플레이트(B)와 영구자석(C), 전면 플레이트(I)로 구성되는 자기회로를 구성하고 후면 플레이트(B)와 전면 플레이트(I)가 이루는 틈새에 삽입한 가동선륜(D)에 전기 에너지를 가하여 얻는 가동선륜(D)의 운동 에너지가 스페이서(E)에 고정된 진동판(G)을 구동하여 소리를 얻는 구조이다.In FIG. 1, a conventional electric energy / acoustic energy converter known so far constitutes a magnetic circuit composed of a rear plate (B), a permanent magnet (C), and a front plate (I), and includes a rear plate (B) and a front plate ( The kinetic energy of the movable wheel D obtained by applying electrical energy to the movable wheel D inserted into the gap formed by I) drives the diaphragm G fixed to the spacer E to obtain sound.

전기에너지/음향에너지 변환기의 진동판(G)은 전면과 후면에서 각각 반대의 위상을 가진 음향에너지를 발생하며, 종래의 기술은 진동판(G)의 전면에서 발생하는 음향을 출력하여 듣도록 되어 있다.The diaphragm G of the electric energy / acoustic energy converter generates acoustic energy having opposite phases at the front and the rear, respectively, and the conventional technology is to output and listen to the sound generated from the front of the diaphragm G.

상기한 종래의 구성은 도 4에 도시한 바와 같이 진동판(G)의 반대방향에 비하여 진동판(G)의 전면 방향에서 높은 밀도를 가진 자기장을 형성하게 된다.The conventional configuration described above forms a magnetic field having a high density in the front direction of the diaphragm G as compared to the opposite direction of the diaphragm G as shown in FIG. 4.

이와 같이 종래의 전기에너지/음향에너지 변환기가 음향출력 방향에 높은 밀도를 가진 자기장을 형성하기 때문에 헤드폰이나 핸드폰과 같이 전기에너지/음향에너지 변환기를 귀에 밀착하여 사용하는 경우에 있어 인체에 자기장으로 인한 부정적인 영향을 끼치게 되는 것으로 알려져 있다.As the conventional electric energy / acoustic energy converter forms a magnetic field having a high density in the direction of the sound output, when the electric energy / acoustic energy converter is used in close contact with the ear such as a headphone or a mobile phone, It is known to be affected.

따라서 본 발명의 목적은 종래의 전기에너지/음향에너지 변환기가 가지고 있는 자기장의 높은 밀도를 저감할 수 있는 새로운 방식의 전기에너지/음향에너지 변환기를 제공하는 것이다.Accordingly, an object of the present invention is to provide a new type of electric energy / sound energy converter capable of reducing the high density of the magnetic field of the conventional electric energy / sound energy converter.

이 과제는, 종래기술에 의한 전기에너지/음향에너지 변환기의 음향출력을 차폐하고, 진동판(G)의 후면에서 발생하는 음향을 출력하게 하는 방식으로 인체에 밀착하여 사용되는 방향을 전환함으로서 인체에 부정적 영향을 미치는 자기장을 저감하여 간단히 달성할 수 있다.This problem is negative to the human body by switching the direction used in close contact with the human body in a manner that shields the acoustic output of the electric energy / acoustic energy converter according to the prior art and outputs the sound generated from the rear surface of the diaphragm G. This can be achieved simply by reducing the affecting magnetic field.

도 1은 종래의 전기에너지/음향에너지 변환기의 단면도1 is a cross-sectional view of a conventional electric energy / acoustic energy converter

도 2는 본 발명에 의한 전기에너지/음향에너지 변환기의 단면도2 is a cross-sectional view of the electric energy / sound energy converter according to the present invention

도 3은 본 발명에 의한 전기에너지/음향에너지 변환기의 구조도3 is a structural diagram of the electric energy / sound energy converter according to the present invention

도 4는 마그네틱 요크의 자기장 분포에 대한 설명도4 is an explanatory diagram of the magnetic field distribution of the magnetic yoke

＜도면의 주요 부분에 대한 부호의 설명＞<Description of the code | symbol about the principal part of drawing>

A : 음향출력구 B : 후면 플레이트A: Sound output port B: Back plate

C : 영구자석 D : 가동선륜C: permanent magnet D: movable wheel

E : 스페이서 F : 음향차폐물E: Spacer F: Acoustic Shield

G : 진동판 H : 더스트 카버G: Diaphragm H: Dust Carver

I : 전면 플레이트 M : 자력선I: front plate M: magnetic lines

도 3에서, 보면 후면 플레이트(B)의 내부에 영구자석(C)과 전면 플레이트를 설치한 자기회로를 구성하여, 자기회로의 후면 플레이트와 전면 플레이트가 이루는 개구부의 틈새에 가동선륜(D)를 삽입하고 삽입된 가동선출(D)에 진동판(G)을 부착한다. 진동판(G)은 음향출력구(A)가 있는 프레임(A)에 고정되어 있는 스페이서(E)에 부착하고, 진동판(G)을 보호하고 외부로부터 자성물질의 유입을 방지하기 위한 더스트 카버(F)와 음향차폐물(F)를 설치하여 자기장의 밀도가 가장 낮은 방향으로 음향을 송출하게 한다.In FIG. 3, the magnetic circuit including the permanent magnet C and the front plate is formed inside the rear plate B, and the movable front wheel D is formed in the gap between the rear plate and the front plate of the magnetic circuit. Insert and attach the diaphragm (G) to the inserted movable selection (D). The diaphragm G is attached to the spacer E fixed to the frame A with the acoustic output port A, and the dust cover F to protect the diaphragm G and prevent the inflow of magnetic material from the outside. ) And the acoustic shield (F) to send the sound in the direction of the lowest density of the magnetic field.

이상 설명한대로, 본 발명의 전기에너지/음향에너지 변환기를 인체에 밀착하여 사용하는 경우에 있어 종래의 전기에너지/음향에너지 변환기가 가지고 있는 밀도가 높은 자기장의 방향을 인체에 대하여 반대방향에 둠으로서 전기에너지/음향에너지 변환기가 가지고 있는 자기장으로부터 인체에 미치는 부정적인 영향을 최소화 할 수 있다.As described above, in the case where the electric energy / acoustic energy converter of the present invention is used in close contact with the human body, by placing the direction of the dense magnetic field of the conventional electric energy / acoustic energy converter in the opposite direction to the human body, The negative effects on the human body from the magnetic field of the energy / acoustic energy converter can be minimized.

Claims (1)

프레임(A)에 개구부를 설치하여 진동판(G)의 배면에서 발생하는 음향을 출력하는 구조의 전기에너지/음향에너지 변환기Electrical energy / acoustic energy converter having a structure that outputs the sound generated from the back of the diaphragm (G) by providing an opening in the frame (A)
KR1020030019742A 2003-03-28 2003-03-28 Technology of Magnetic Field Reduction for Electric Energy/Acoustic Energy Transducer KR20040084579A (en)

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Application Number Priority Date Filing Date Title
KR1020030019742A KR20040084579A (en) 2003-03-28 2003-03-28 Technology of Magnetic Field Reduction for Electric Energy/Acoustic Energy Transducer

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006137665A1 (en) * 2005-06-21 2006-12-28 U-Gentech Co., Ltd Micro speaker unit
KR100767442B1 (en) * 2005-06-21 2007-10-17 영인프런티어(주) Micro speaker unit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010098582A (en) * 2000-04-14 2001-11-08 도낀 가부시끼가이샤 Multi-functional vibration actuator capable of suppressing an unstable operation around a resonance frequency
KR20010101915A (en) * 1999-12-02 2001-11-15 도낀 가부시끼가이샤 Vibration actuator having an elastic member between a suspension plate and a magnetic circuit device
KR20030022619A (en) * 2001-09-11 2003-03-17 주식회사 이엠텍 Receiving unit for terminal having a side soundproofing device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010101915A (en) * 1999-12-02 2001-11-15 도낀 가부시끼가이샤 Vibration actuator having an elastic member between a suspension plate and a magnetic circuit device
KR20010098582A (en) * 2000-04-14 2001-11-08 도낀 가부시끼가이샤 Multi-functional vibration actuator capable of suppressing an unstable operation around a resonance frequency
KR20030022619A (en) * 2001-09-11 2003-03-17 주식회사 이엠텍 Receiving unit for terminal having a side soundproofing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006137665A1 (en) * 2005-06-21 2006-12-28 U-Gentech Co., Ltd Micro speaker unit
KR100767442B1 (en) * 2005-06-21 2007-10-17 영인프런티어(주) Micro speaker unit

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