KR20090035815A - Voice coil motor - Google Patents

Voice coil motor Download PDF

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Publication number
KR20090035815A
KR20090035815A KR1020070100813A KR20070100813A KR20090035815A KR 20090035815 A KR20090035815 A KR 20090035815A KR 1020070100813 A KR1020070100813 A KR 1020070100813A KR 20070100813 A KR20070100813 A KR 20070100813A KR 20090035815 A KR20090035815 A KR 20090035815A
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KR
South Korea
Prior art keywords
coil
bobbin
spring
lens
voice coil
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KR1020070100813A
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Korean (ko)
Inventor
오영돈
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엘지이노텍 주식회사
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Priority to KR1020070100813A priority Critical patent/KR20090035815A/en
Publication of KR20090035815A publication Critical patent/KR20090035815A/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/02—Focusing arrangements of general interest for cameras, projectors or printers moving lens along baseboard
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
    • H02K33/10—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs wherein the alternate energisation and de-energisation of the single coil system is effected or controlled by movement of the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/035—DC motors; Unipolar motors
    • H02K41/0352—Unipolar motors
    • H02K41/0354—Lorentz force motors, e.g. voice coil motors
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053—Driving means for the movement of one or more optical element
    • G03B2205/0069—Driving means for the movement of one or more optical element using electromagnetic actuators, e.g. voice coils

Abstract

A voice coil motor is provided to prevent the coil from being bent by connecting the spring connected to the bobbin bottom to the end of the coil by soldering. The voice coil motor comprises the bobbin(210), and permanent magnet, and coil and spring. The coil is wound outside the bobbin movable to vertical direction. The wire-wound coil forms the magnetic field according to the size and direction of the current. The coil moves the bobbin fixing the lens to the vertical direction by attraction and repulsive force of the adjacent permanent magnet. In the bottom of bobbin, the spring for elastically supporting the vertical displacement of bobbin is connected. The start line of the coil and the end line(250) are connected with the end part of the spring(230) by soldering.

Description

음성 코일 모터{Voice Coil Motor}Voice Coil Motor

본 발명은 음성 코일 모터(Voice Coil Motor)에 관한 것이다.The present invention relates to a voice coil motor.

일반적으로, 핸드폰이나 디지털 카메라와 같은 소형 광학기기에 사용되는 카메라 모듈(camera module)은 배율 조정(zoom)이나 초점 조절(focusing)을 위한 액츄에이터가 장착된다. 이러한 액츄에이터는 크게 음성 코일 모터(Voice Coil Motor:VCM)방식, PZT(Piezo Actuators)방식, 회전 모터 방식으로 나눌 수 있다. In general, a camera module used in a small optical device such as a mobile phone or a digital camera is equipped with an actuator for zooming or focusing. Such actuators can be broadly classified into a voice coil motor (VCM), a piezo actuator (PZT), and a rotary motor.

그러나, 상기 PZT 방식은 작고 가볍게 만들어질 수 있는 반면에 고전압이 필요하다는 단점이 있고, 상기 회전 모터 방식은 회전 운동을 직선 운동으로 바꾸어 주어야하므로 구조가 복잡해지는 단점이 있기 때문에 주로 음성 코일 모터(Voice Coil Motor)방식을 사용한다.However, while the PZT method can be made small and light, there is a disadvantage in that a high voltage is required, and the rotary motor method has a disadvantage in that the structure is complicated because the rotary motion must be changed to a linear motion. Coil Motor) is used.

상기 음성 코일 모터(Voice Coil Motor)방식은 스피커의 음성 코일에 흐르는 음성 전류와 영구자석에서 발생하는 자기력 사이에 플레밍의 왼손법칙에 의한 힘이 발생하여 스피커의 진동관이 앞뒤로 진동하는 것에 착안하여 개발된 모터로써, 카 메라 모듈에서 렌즈의 이동과 같이 비교적 짧은 거리를 정밀하게 직선으로 이동시키는 시스템에 유용하다.The voice coil motor method is developed by focusing on the vibration of the vibrating tube of the speaker back and forth due to the force generated by the left hand law of Fleming between the voice current flowing through the voice coil of the speaker and the magnetic force generated in the permanent magnet. This motor is useful for systems that move relatively short distances precisely in a straight line, such as lens movement in camera modules.

도 1은 종래의 음성 코일 모터를 나타내는 평면도이다.1 is a plan view showing a conventional voice coil motor.

렌즈를 고정할 수 있는 렌즈고정부를 구비하고 수직 방향으로 이동 가능한 보빈(bobbin)(110)과, 상기 보빈(110)의 외부에 감겨 있고 입력되는 전류의 크기와 방향에 따라 자기장을 발생시키는 코일(coil)(120)과, 상기 보빈(110)의 하단에 연결되어 보빈(110)의 수직 이동을 탄성적으로 지지하고, 상기 코일(120)의 끝 부분과 납땜 연결되어 전원회로(미도시)로부터의 전류를 상기 코일(120)로 흘리는 역할을 하는 스프링(130)으로 구성되어 있다.A bobbin 110 having a lens fixing part for fixing the lens and movable in a vertical direction, and a coil wound around the outside of the bobbin 110 and generating a magnetic field according to the magnitude and direction of the input current. Coil 120 is connected to the lower end of the bobbin 110 to elastically support the vertical movement of the bobbin 110, and is soldered and connected to an end of the coil 120 to supply a power circuit (not shown). It is composed of a spring 130 that serves to flow the current from the coil 120.

그러나, 종래의 음성 코일 모터(100)에서는 보빈(110)에 코일을 감은 후, 하단 스프링과 상기 코일(120)과의 납땜 공정 시 코일의 시선(start-wire)(140) 및 종선(end-wore)(150)에서 도 1에서 보는 바와 같이 꺾임이 발생한다. 따라서, 종래의 음성 코일 모터가 외부의 충격, 이를테면 낙하 또는 진동 등의 충격을 받았을 때 상기 코일의 꺾임 부위로 압력이 가해지고 이로 인해 상기 코일이 끊어질 수 있는 단점이 있다. However, in the conventional voice coil motor 100, the coil is wound around the bobbin 110 and then the start-wire 140 and the end-line of the coil during the soldering process of the lower spring and the coil 120 are performed. In the wore) 150, the bending occurs as shown in FIG. Accordingly, when the conventional voice coil motor is subjected to an external shock, such as a drop or vibration, pressure is applied to the bending portion of the coil, which causes the coil to be broken.

또한, 상기 코일의 끊어짐으로써, 전류가 흐르지 못하여 자동 초점을 위한 렌즈이동 동작을 할 수 없는 상태가 될 수 있다.In addition, since the coil is broken, current may not flow, and thus the lens shift operation for autofocus may not be performed.

본 발명은 코일의 꺾임 없이 보빈 하단에 연결되는 스프링과 상기 코일의 끝 부분을 납땜 연결한 음성 코일 모터를 제공하는 것을 목적으로 한다.It is an object of the present invention to provide a voice coil motor in which a spring is connected to the bottom of a bobbin without bending a coil and a solder end of the coil is soldered.

음성 코일 모터의 보빈 하단에 연결되는 스프링을 코일의 감김 방향을 고려하여 연장시켜 상기 코일의 끝 부분과 납땜 연결함으로써 코일의 꺾임을 방지한다. The spring connected to the bobbin lower end of the voice coil motor is extended in consideration of the winding direction of the coil to prevent soldering of the coil by soldering the end of the coil.

본 발명은 음성 코일 모터의 보빈 하단에 연결되는 스프링을 코일의 감겨있는 방향을 고려하여 상기 코일이 꺾임 없이 연결될 수 있는 소정의 위치까지 연장하여 상기 코일의 끝 부분과 납땜하여 연결함으로써, 코일의 무리한 꺾임을 방지하여 와이어 텐션(wire tension)을 조절하여 외부로부터의 충격을 분산할 수 있고 낙하나 진동 등의 충격으로 인한 코일의 끊어짐을 방지할 수 있는 효과가 있다.The present invention extends the spring connected to the bobbin lower end of the voice coil motor to a predetermined position to which the coil can be connected without bending in consideration of the winding direction of the coil, and connects the soldered portion with the end of the coil to prevent the coil from being unreasonable. By preventing the bending, it is possible to disperse the impact from the outside by adjusting the wire tension and to prevent the break of the coil due to the impact such as falling or vibration.

본 발명은 렌즈를 고정할 수 있는 렌즈고정부를 구비하고 수직 방향으로 이동 가능한 보빈과, 상기 보빈의 외부에 감겨 있으며 입력 전류에 따라 자기장을 발생시키는 코일과, 상기 코일이 꺾이지 않는 소정의 위치까지 연장되어 상기 코일의 끝 부분과 납땜하여 상기 보빈의 하단에 연결되는 스프링을 포함한다. 이때, 상기 코일에 의해 발생한 자기장과 영구 자석과의 인력 또는 척력에 의해 렌즈가 고정된 보빈이 수직 이동하며, 상기 보빈의 하단에 상기 코일과 납땜연결된 스프링에 의해 상기 보빈의 수직 이동이 탄성적으로 지지되며, 코일로 전류가 흐른다.The present invention includes a bobbin having a lens fixing portion for fixing a lens and movable in a vertical direction, a coil wound around the outside of the bobbin and generating a magnetic field according to an input current, and to a predetermined position where the coil is not bent. It extends and solders to the end of the coil and includes a spring connected to the bottom of the bobbin. At this time, the bobbin in which the lens is fixed is vertically moved by the attraction force or repulsive force between the magnetic field generated by the coil and the permanent magnet, and the vertical movement of the bobbin is elastically moved by a spring soldered to the coil at the bottom of the bobbin. Supported, current flows through the coil.

이하, 첨부한 도면을 참조하여 본 발명에 따른 음성 코일 모터에 대해 상세히 설명한다.Hereinafter, a voice coil motor according to the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 실시 예에 따른 음성 코일 모터를 나타내는 평면도이다.2 is a plan view illustrating a voice coil motor according to an exemplary embodiment of the present invention.

본 발명에 따른 음성 코일 모터(200)는 보빈(bobbin)(210)과, 영구 자석(미도시)과, 코일(coil)(220) 및 스프링(230)으로 구성되어 있다.Voice coil motor 200 according to the present invention is composed of a bobbin (210), a permanent magnet (not shown), a coil (220) and a spring (230).

렌즈를 고정할 수 있는 렌즈고정부를 구비하고 수직 방향으로 이동 가능한 보빈(bobbin)(210)의 외부에 코일(coil)(220)이 감겨 있고, 상기 감겨 있는 코일(220)은 입력되는 전류의 크기 및 방향에 따라, 자기장을 형성하고 인접한 영구 자석(미도시)과의 인력 및 척력에 의해 상기 렌즈를 고정한 보빈(210)을 수직 방향으로 이동시킨다. 또한, 보빈(210)의 하단에는 보빈(210)의 수직 이동을 탄성적으로 지지하기 위한 스프링(230)이 연결되어 있고, 상기 코일(220)의 시선(240) 및 종선(250)과 각각 스프링(230)의 끝 부분이 납땜으로 연결되어 전원회로(미도시)에서 코일(220)로 전류를 흐르게 한다. The coil 220 is wound on the outside of the bobbin 210 which has a lens fixing part for fixing the lens and is movable in the vertical direction, and the coil 220 which is wound has the input current According to the size and direction, the bobbin 210 fixing the lens is moved in the vertical direction by forming a magnetic field and by attraction and repulsion with an adjacent permanent magnet (not shown). In addition, a spring 230 for elastically supporting the vertical movement of the bobbin 210 is connected to the lower end of the bobbin 210, and each of the spring and vertical line 250 of the coil 220 and spring An end portion of the 230 is connected by soldering so that a current flows from the power supply circuit (not shown) to the coil 220.

이때, 상기 스프링(230)과 상기 코일(220)의 시선(240) 및 종선(250)이 꺾임 없이 연결될 수 있는 소정의 위치까지 상기 스프링(230)의 끝 부분을 연장하는 것이 바람직하다.At this time, it is preferable to extend the end portion of the spring 230 to a predetermined position where the line of sight 240 and the vertical line 250 of the spring 230 and the coil 220 can be connected without bending.

따라서, 상기 코일(220)의 무리한 꺾임을 방지하고, 이에 따라 와이어 텐션(wire tension)이 조절되어 외부로부터의 충격을 분산할 수 있고, 낙하나 진동 등의 충격으로 인한 코일(220)의 끊어짐을 방지할 수 있다.Therefore, to prevent excessive bending of the coil 220, according to the wire tension (wire tension) can be adjusted to disperse the impact from the outside, the break of the coil 220 due to impact such as falling or vibration You can prevent it.

상기 설명은 본 발명의 특정 실시 예에 대한 설명에 불과하고, 본 발명은 이러한 특정 실시 예에 한정되지 않으며, 상술한 구체적인 실시 예로부터 다양한 변형이나 응용이 가능하다는 것을 본 발명이 속하는 기술분야의 통상적인 지식을 가진 자는 쉽게 알 수 있다.The above description is merely a description of specific embodiments of the present invention, and the present invention is not limited to these specific embodiments, and various modifications and applications are possible from the specific embodiments described above. Those who have knowledge can easily know.

도 1은 종래의 음성 코일 모터를 나타내는 평면도이다.1 is a plan view showing a conventional voice coil motor.

도 2는 본 발명의 실시 예에 따른 음성 코일 모터를 나타내는 평면도이다.2 is a plan view illustrating a voice coil motor according to an exemplary embodiment of the present invention.

Claims (4)

렌즈를 고정할 수 있는 렌즈고정부를 구비하고 수직 방향으로 이동 가능한 보빈;A bobbin having a lens fixing part capable of fixing the lens and movable in a vertical direction; 상기 보빈의 외부에 감겨 있으며 입력 전류에 따라 자기장을 발생시키는 코일;A coil wound around the outside of the bobbin and generating a magnetic field according to an input current; 상기 보빈의 하단에 상기 코일의 꺾임 없이 연결될 수 있는 소정의 위치까지 연장되어 상기 코일의 끝 부분과 납땜연결되는 스프링;A spring extending to a predetermined position that can be connected to the lower end of the bobbin without bending the coil and soldered to an end portion of the coil; 을 포함하는 음성 코일 모터.Voice coil motor comprising a. 제 1항에 있어서, The method of claim 1, 상기 코일에 의해 발생한 자기장과 상기 코일에 인접해 있는 영구 자석과의 인력 또는 척력에 의해 렌즈가 부착된 보빈이 수직 이동하는 음성 코일 모터.And a bobbin to which a lens is attached is moved vertically by an attractive force or a repulsive force between a magnetic field generated by the coil and a permanent magnet adjacent to the coil. 제 1항에 있어서,The method of claim 1, 상기 보빈의 하단에 연결된 스프링은 상기 보빈의 수직 이동을 탄성적으로 지지하는 음성 코일 모터.A spring connected to the lower end of the bobbin elastically supports the vertical movement of the bobbin. 제 1항에 있어서,The method of claim 1, 상기 코일의 끝 부분과 납땜연결되는 스프링은 전원회로와 연결되어 전원회 로로부터 코일로 전류가 흐르게 하는 음성 코일 모터.And a spring connected to the end of the coil by soldering is connected to a power circuit to allow current to flow from the power circuit to the coil.
KR1020070100813A 2007-10-08 2007-10-08 Voice coil motor KR20090035815A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104834032A (en) * 2015-04-29 2015-08-12 长春理工大学 Liquid lens high-speed zoom system based on surface tension constraints
CN106026604A (en) * 2016-06-06 2016-10-12 歌尔股份有限公司 Linear vibrating motor
CN106331449A (en) * 2016-08-22 2017-01-11 惠州Tcl移动通信有限公司 Camera noise preventing structure for intelligent equipment, intelligent equipment and mobile phone

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104834032A (en) * 2015-04-29 2015-08-12 长春理工大学 Liquid lens high-speed zoom system based on surface tension constraints
CN106026604A (en) * 2016-06-06 2016-10-12 歌尔股份有限公司 Linear vibrating motor
CN106331449A (en) * 2016-08-22 2017-01-11 惠州Tcl移动通信有限公司 Camera noise preventing structure for intelligent equipment, intelligent equipment and mobile phone
CN106331449B (en) * 2016-08-22 2019-06-21 惠州Tcl移动通信有限公司 A kind of structure and smart machine, mobile phone of the anti-camera noise of smart machine

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