JP2008203283A - Lens drive unit, camera, and mobile phone with camera - Google Patents

Lens drive unit, camera, and mobile phone with camera Download PDF

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JP2008203283A
JP2008203283A JP2007035753A JP2007035753A JP2008203283A JP 2008203283 A JP2008203283 A JP 2008203283A JP 2007035753 A JP2007035753 A JP 2007035753A JP 2007035753 A JP2007035753 A JP 2007035753A JP 2008203283 A JP2008203283 A JP 2008203283A
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spring
outer peripheral
peripheral side
adhesive
yoke
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JP4899912B2 (en
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Manabu Shiraki
白木　　学
Naoki Sekiguchi
直樹 関口
Morimasa Yoshie
守正 吉江
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Shicoh Engineering Co Ltd
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Shicoh Engineering Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens drive unit in which the outer circumferential part of a spring can be joined and fixed to its adjacent member with an adhesive without impairing the function of the arm of the spring, and to provide a camera and a mobile phone with a camera. <P>SOLUTION: In the lens drive unit 1, an adhesive injection hole 6b is provided to a housing 6. Using the adhesive injected from the adhesive injection hole 6b of the housing 6, the outer circumferential part 9b of the spring 9 is joined to its adjacent members, namely, a yoke 3 and the housing 6. In the outer circumferential part 9b of the spring and in an area between the position 18 facing the adhesive flow-in hole 6b and the connection end 21 of the arm part 9c of the spring 9, a narrow width part 23 is formed so that a width between the internal circumferential edge or external circumferential edge of the outer circumferential part 9b of the spring 9 is narrowed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、小型カメラに用いられるレンズ駆動装置、カメラ及びカメラ付き携帯電話に関する。   The present invention relates to a lens driving device used for a small camera, a camera, and a camera-equipped mobile phone.

この種のレンズ駆動装置において、特許文献１には、スプリング（前側スプリング）が内周側部と、外周側部と、内周側部と外周側部とを連結する腕部とを有しており、スプリングの内周側部をレンズ支持体に固定し且つ外周側部をヨークと筐体部（前側筐体部）との間に配置する構成が開示されている。   In this type of lens driving device, Patent Document 1 includes a spring (front spring) having an inner peripheral side portion, an outer peripheral side portion, and an arm portion that connects the inner peripheral side portion and the outer peripheral side portion. A configuration is disclosed in which the inner peripheral side portion of the spring is fixed to the lens support and the outer peripheral side portion is disposed between the yoke and the housing portion (front housing portion).

スプリングの外周部の固定については、具体的記載がないが、筐体部（前側筐体部）に接着剤流入孔を設けてあり、接着剤流入孔から流入した熱硬化接着剤を加熱することにより筐体部（スプリング外周部の隣接部材）とスプリングの外周部との間及びヨーク（スプリング外周部の隣接部材）とスプリングの外周部との間を接着固定していた。即ち、スプリングの外周部における接着固定では、熱硬化接着剤が加熱により一時的に流動化することにより、筐体部とスプリングの外周側部との間やヨークとスプリングの外周部との間に毛細管現象（表面張力）により接着剤を流入して、これらを接着固定していた。   Although there is no specific description about fixing of the outer peripheral part of the spring, an adhesive inflow hole is provided in the casing (front casing), and the thermosetting adhesive flowing in from the adhesive inflow hole is heated. Thus, the housing portion (adjacent member of the spring outer peripheral portion) and the outer peripheral portion of the spring and the yoke (adjacent member of the spring outer peripheral portion) and the outer peripheral portion of the spring are bonded and fixed. That is, in the adhesive fixing at the outer periphery of the spring, the thermosetting adhesive is temporarily fluidized by heating, so that it is between the casing and the outer peripheral side of the spring or between the yoke and the outer peripheral portion of the spring. Adhesives were introduced by capillarity (surface tension) to fix them.

特開２００６−３２３２５１号公報JP 2006-323251 A

しかし、図１０及び図１１に示すように、筐体部（前側筐体部）６とスプリングの外周側部９ｂとの間に毛細管現象により接着剤Ｓが流入すると、スプリングの外周側部９ｂの面に沿って接着剤が流れ、スプリングの腕部端２１に到達すると、腕部９ｃにも接着剤が流れてしまい、腕部端２１に食み出した接着剤Ｓで腕部９ｃをヨーク３等の隣接部材に固定して腕部９ｃの機能を阻害するという問題があった。   However, as shown in FIGS. 10 and 11, when the adhesive S flows between the casing (front casing) 6 and the outer peripheral side 9b of the spring by capillary action, the outer peripheral side 9b of the spring When the adhesive flows along the surface and reaches the arm end 21 of the spring, the adhesive also flows to the arm 9c, and the arm 9c is moved to the yoke 3 by the adhesive S that protrudes from the arm end 21. There is a problem that the function of the arm portion 9c is hindered by being fixed to an adjacent member.

そこで、本発明は、スプリングの腕部の機能を阻害することなくスプリングの外周部をその隣接部材に接着剤で接着固定できるレンズ駆動装置、カメラ及びカメラ付き携帯電話の提供を目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a lens driving device, a camera, and a camera-equipped mobile phone that can adhere and fix an outer peripheral portion of a spring to an adjacent member thereof without hindering the function of an arm portion of the spring.

請求項１に記載の発明は、環状のヨークと、ヨークの内周側に配置され且つ外周にコイルが固定されたレンズ支持体と、マグネットと、スプリングと、筐体部とを備え、マグネットはヨークの外周壁の内周側に配置されており、スプリングは内周側部と、外周側部と、内周側部と外周側部とを連結する腕部とを有し、内周側部をレンズ支持体に固定し且つ外周側部をヨークと筐体部との間に配置してあり、ヨークに対してレンズ支持体を光軸方向に移動自在に支持しており、コイルに通電して生じる電磁力によりレンズ支持体をレンズの光軸方向に沿って前後に移動するレンズ駆動装置であって、筐体部には接着剤注入孔が設けてあり、筐体部の接着剤注入孔から注入した接着剤でスプリングの外周側部をその隣接部材に接着固定しており、スプリングの外周側部において接着剤流入孔との対面位置と腕部の接続端との間には、内周縁又は外周縁との間における幅を狭くした幅狭部を形成してあることを特徴とする。   The invention according to claim 1 includes an annular yoke, a lens support body disposed on the inner peripheral side of the yoke and having a coil fixed to the outer periphery, a magnet, a spring, and a housing portion. The spring is disposed on the inner peripheral side of the outer peripheral wall of the yoke, and the spring has an inner peripheral side portion, an outer peripheral side portion, and an arm portion connecting the inner peripheral side portion and the outer peripheral side portion, and the inner peripheral side portion. Is fixed to the lens support, and the outer peripheral side portion is disposed between the yoke and the housing. The lens support is supported by the yoke so as to be movable in the optical axis direction, and the coil is energized. The lens driving device moves the lens support body back and forth along the optical axis direction of the lens by electromagnetic force generated by the electromagnetic force, and the housing portion is provided with an adhesive injection hole, and the adhesive injection hole of the housing portion The outer peripheral side of the spring is bonded and fixed to the adjacent member with the adhesive injected from In the outer peripheral side portion of the pulling, a narrow portion having a narrow width between the inner peripheral edge or the outer peripheral edge is formed between the position facing the adhesive inflow hole and the connecting end of the arm portion. And

請求項２に記載の発明は、請求項１に記載の発明において、幅狭部は、スプリングの外周側部に形成した孔或いは、内周縁又は外周縁に形成した凹みにより形成していることを特徴とする。   The invention according to claim 2 is the invention according to claim 1, wherein the narrow portion is formed by a hole formed in the outer peripheral side portion of the spring or a recess formed in the inner peripheral edge or the outer peripheral edge. Features.

請求項３に記載の発明は、請求項１又は２に記載の発明において、スプリングの外周側部の隣接部材には、少なくともスプリングの腕部端に位置する部位に溝又は孔が設けてあることを特徴とする。   The invention according to claim 3 is the invention according to claim 1 or 2, wherein the adjacent member on the outer peripheral side portion of the spring is provided with a groove or a hole at least at a position located at the end of the arm portion of the spring. It is characterized by.

請求項４に記載の発明は、請求項１〜３の何れか一項に記載のレンズ駆動装置を備えることを特徴とするカメラである。   According to a fourth aspect of the present invention, there is provided a camera comprising the lens driving device according to any one of the first to third aspects.

請求項５に記載の発明は、請求項４に記載のカメラを搭載したことを特徴とするカメラ付き携帯電話である。   A fifth aspect of the present invention is a camera-equipped mobile phone in which the camera according to the fourth aspect is mounted.

請求項１に記載の発明によれば、接着剤注入孔から流入した接着剤が、スプリングの外周側部とその隣接部材（筐体部、ヨーク又はスペーサ）との間に毛細管現象により流入した場合、スプリングの外周側部には、接着剤流入孔との対面位置と腕部端との間に、内周縁又は外周縁との間の幅を狭くした幅狭部を形成しているので、毛細管現象（又は表面張力）により幅狭部を流れる接着剤の流量を少なくでき（換言すると流れの抵抗となり）、接着剤が腕部端の位置まで到達するのを防止する。従って、接着剤が腕部端又は腕部の一部を隣接部材に固定してスプリングの機能を阻害するのを防止できる。   According to the first aspect of the present invention, when the adhesive flowing in from the adhesive injection hole flows in between the outer peripheral side portion of the spring and its adjacent member (housing, yoke, or spacer) by capillary action. Since the outer peripheral side portion of the spring is formed with a narrow portion narrowed between the inner peripheral edge or the outer peripheral edge between the position facing the adhesive inflow hole and the arm end, the capillary tube Due to the phenomenon (or surface tension), the flow rate of the adhesive flowing through the narrow portion can be reduced (in other words, the flow resistance), and the adhesive can be prevented from reaching the position of the arm end. Therefore, it is possible to prevent the adhesive from fixing the end of the arm part or a part of the arm part to the adjacent member and inhibiting the function of the spring.

請求項２に記載の発明によれば、請求項１に記載の作用効果を奏することができると共に、幅狭部を容易に形成できる。   According to the second aspect of the present invention, the function and effect of the first aspect can be achieved and the narrow portion can be easily formed.

請求項３に記載の発明によれば、請求項１又は２に記載の作用効果を奏することができると共に、スプリングの腕部端又はその近傍において接着剤が毛細管現象によりスプリング外周側部から食み出すことを防止できるので、接着剤がスプリングの腕部にかかるのを防止できる。   According to the invention described in claim 3, the effects described in claim 1 or 2 can be obtained, and the adhesive erodes from the outer peripheral side of the spring by capillary action at or near the arm end of the spring. Since it can prevent taking out, it can prevent that an adhesive agent applies to the arm part of a spring.

請求項４に記載の発明によれば、請求項１〜３の何れか一項に記載の作用効果を奏するカメラを提供できる。   According to the invention described in claim 4, it is possible to provide a camera having the operational effects described in any one of claims 1 to 3.

請求項５に記載の発明によれば、請求項４に記載の作用効果を奏するカメラ付き携帯電話を提供できる。   According to the invention described in claim 5, it is possible to provide a camera-equipped mobile phone having the function and effect described in claim 4.

以下に、添付図面の図１〜図７を参照して本発明の実施の形態を説明する。図１は本発明の実施の形態に係るレンズ駆動装置において、接着剤が流動化したときのヨーク、スプリング及び前側筐体部との関係を示す断面図であり、図２は図１における接着剤の流れを説明する為、前側筐体部を除いて示す平面図であり、図３は図７のＡ−Ａ断面図であり、図４は前側スプリング（スプリング）の平面図であり、図５は本発明の実施の形態に係るレンズ駆動装置を前側から見た分解斜視図であり、図６は本発明の実施の形態に係るレンズ駆動装置を後側から見た分解斜視図であり、図７は実施の形態に係るレンズ駆動装置の斜視図である。   Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view showing a relationship between a yoke, a spring, and a front casing when the adhesive is fluidized in the lens driving device according to the embodiment of the present invention, and FIG. 2 is an adhesive in FIG. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 7, FIG. 4 is a plan view of the front spring (spring), and FIG. FIG. 6 is an exploded perspective view of the lens driving device according to the embodiment of the present invention as viewed from the front side, and FIG. 6 is an exploded perspective view of the lens driving device according to the embodiment of the present invention as viewed from the rear side. 7 is a perspective view of the lens driving device according to the embodiment.

本実施の形態に係るレンズ駆動装置１は、携帯電話に組み込まれるオートフォーカスカメラのレンズ駆動装置である。このレンズ駆動装置１は、図３、図５及び図６に示すように、環状のヨーク３と、レンズ支持体７と、前側スプリング（スプリング）９と、後側スプリング１１と、ヨーク３の後側に配置される後側筐体部５と、ヨーク３の前側に配置される前側筐体部（筐体部）６とを備えており、レンズ支持体７には、外周にコイル１５が固定されている。ヨーク３と後側スプリング１１との間には絶縁体（スペーサ）１７が配置されている。このレンズ駆動装置１は、縦横が約１０ｍｍ、高さが約３．５ｍｍで非常に小さいものである。   A lens driving device 1 according to the present embodiment is a lens driving device for an autofocus camera incorporated in a mobile phone. As shown in FIGS. 3, 5, and 6, the lens driving device 1 includes an annular yoke 3, a lens support 7, a front spring (spring) 9, a rear spring 11, and a rear of the yoke 3. A rear housing portion 5 disposed on the side and a front housing portion (housing portion) 6 disposed on the front side of the yoke 3, and a coil 15 is fixed to the outer periphery of the lens support 7. Has been. An insulator (spacer) 17 is disposed between the yoke 3 and the rear spring 11. This lens driving device 1 is very small with about 10 mm in length and width and about 3.5 mm in height.

ヨーク３は前側から見て外周が平面視四角形であり、内周が平面視円形になっており、外周壁３ａと、内周壁３ｂと、外周壁３ａと内周壁３ｂとを連結する連結壁３ｃとからなり、外周壁３ａと内周壁３ｂと連結壁３ｃとで断面がコ字形状又はＵ字形状を成している。内周壁３ｂには、後側端から前方に向けて切除部１２が形成されている。切除部１２は周方向に等間隔をあけて配置してあり、本実施の形態では、平面視四角形状の外周壁３ａにおいて、隣り合う角部１４間（辺の部分）の位置に設けてある。   The yoke 3 has a quadrangular outer periphery when viewed from the front side and a circular inner periphery when viewed from the front side. The outer peripheral wall 3a, the inner peripheral wall 3b, and the connecting wall 3c that connects the outer peripheral wall 3a and the inner peripheral wall 3b. The outer peripheral wall 3a, the inner peripheral wall 3b, and the connecting wall 3c have a U-shaped or U-shaped cross section. On the inner peripheral wall 3b, a cut portion 12 is formed from the rear end toward the front. The cut portions 12 are arranged at equal intervals in the circumferential direction. In the present embodiment, the cut portions 12 are provided at positions between adjacent corner portions 14 (side portions) on the outer peripheral wall 3a having a rectangular shape in plan view. .

ヨーク３の各角部１４において、外周壁３ａの内周面にはマグネット１３が固定されている。マグネット１３は、角部１４のみに設けてあり、内周壁３ｂに形成された切除部１２に対応する位置にはない。   At each corner 14 of the yoke 3, a magnet 13 is fixed to the inner peripheral surface of the outer peripheral wall 3a. The magnet 13 is provided only in the corner portion 14 and is not located at a position corresponding to the cut portion 12 formed in the inner peripheral wall 3b.

図１、図２及び図５に示すように、ヨーク３の連結壁３ｃの外面には溝１６が形成されている。溝１６は平面視四角形の辺に沿って、隣り合う角部１４、１４間に形成されており、且つ図１に示すように、少なくとも前側スプリング９の外周側部９ｂにおける腕部端２１に位置する部位に溝１６が位置している。   As shown in FIGS. 1, 2, and 5, a groove 16 is formed on the outer surface of the connecting wall 3 c of the yoke 3. The groove 16 is formed between the adjacent corners 14 and 14 along the side of the quadrangle in plan view, and as shown in FIG. 1, is located at the arm end 21 at least on the outer peripheral side 9b of the front spring 9. The groove 16 is located at the site to be operated.

図５及び図６に示すように、レンズ支持体７は略円筒形状であり、その内周部にレンズ（図示せず）が装着されて、ヨーク３の内周側を光軸方向（前後方向）に移動自在に設けられている。レンズ支持体７の外周には環状のコイル１５が装着されており、コイル１５はレンズ支持体７に一体に設けたコイル固定部１９に接着固定されている。   As shown in FIGS. 5 and 6, the lens support 7 has a substantially cylindrical shape, and a lens (not shown) is mounted on the inner peripheral portion thereof, and the inner peripheral side of the yoke 3 is arranged in the optical axis direction (front-rear direction). ) Is movably provided. An annular coil 15 is mounted on the outer periphery of the lens support 7, and the coil 15 is bonded and fixed to a coil fixing portion 19 provided integrally with the lens support 7.

コイル１５はヨーク３の外周壁３ａと内周壁３ｂとの間に配置するが（図３参照）、マグネット１３がある角部１４ではマグネット１３と内周壁３ｂとの間に位置し、レンズ支持体７と共にヨーク３内を前後方向に移動するようになっている。   Although the coil 15 is disposed between the outer peripheral wall 3a and the inner peripheral wall 3b of the yoke 3 (see FIG. 3), the lens 13 is located between the magnet 13 and the inner peripheral wall 3b at the corner 14 where the magnet 13 is located. 7 and the yoke 3 are moved in the front-rear direction.

図５及び図６に示すように、後側筐体部５は外周形状が平面視四角形であり、ヨーク３の外周に位置する外壁５ａと、ヨーク３の後側に位置する基底部５ｂとを有しており、後側筐体部５の基底部５ｂには後側スプリング１１の外周側部１１ｂが載置される。   As shown in FIGS. 5 and 6, the rear housing portion 5 has a quadrangular outer shape in plan view, and includes an outer wall 5 a located on the outer circumference of the yoke 3 and a base portion 5 b located on the rear side of the yoke 3. The outer peripheral side portion 11 b of the rear spring 11 is placed on the base portion 5 b of the rear casing portion 5.

平面視四角形の後側筐体部５において、外壁５ａは各角部に立設されており、外壁５ａの内周側面はヨーク３の外周壁３ａに対面している。各外壁５ａの外周側には段部５ｃが形成されている。また、外壁５ａにはその延出方向に隙間５ｄにより２分されている。   In the rear casing 5 having a rectangular shape in plan view, the outer wall 5 a is erected at each corner, and the inner peripheral surface of the outer wall 5 a faces the outer peripheral wall 3 a of the yoke 3. A step portion 5c is formed on the outer peripheral side of each outer wall 5a. Further, the outer wall 5a is divided into two by a gap 5d in the extending direction.

前側筐体部（筐体部）６はヨーク３の前側に配置されており、ヨーク３との間に前側スプリング９の外周側部９ｂを挟んで保持すると共に、ヨーク３の外周で後側筐体部５と連結固定してレンズ駆動装置１の筐体を形成している。尚、本実施の形態では、前側スプリング９の外周側等９ｂに対面する隣接部材は、ヨーク３である。   The front housing portion (housing portion) 6 is disposed on the front side of the yoke 3, holds the outer peripheral side portion 9 b of the front spring 9 between the yoke 3 and the rear housing on the outer periphery of the yoke 3. The housing of the lens driving device 1 is formed by being connected and fixed to the body part 5. In the present embodiment, the adjacent member that faces the outer peripheral side 9 b of the front spring 9 is the yoke 3.

この前側筐体部６は、平面視四角形を成し、各角部から脚部６ａが後側に向けて立設されており、脚部６ａの内周側に後側筐体部５の外壁５ａが位置して、脚部６ａの先端が後側筐体部５の段部５ｃに当接している。   The front housing part 6 has a square shape in plan view, and leg parts 6a are erected from the corners toward the rear side. The outer wall of the rear housing part 5 is provided on the inner peripheral side of the leg parts 6a. 5a is located, and the tip of the leg portion 6a is in contact with the stepped portion 5c of the rear housing portion 5.

前側筐体部６の前面には各角部に接着剤流入孔６ｂが形成されている。この接着剤流入孔６ｂは脚部６ａの内周側に位置し、接着剤流入孔６ｂから流入した接着剤が脚部６ａの内周面とヨーク３の外周壁３ａとの間に流入するようになっている。   An adhesive inflow hole 6 b is formed at each corner on the front surface of the front housing portion 6. The adhesive inflow hole 6b is located on the inner peripheral side of the leg 6a so that the adhesive flowing in from the adhesive inflow hole 6b flows between the inner peripheral surface of the leg 6a and the outer peripheral wall 3a of the yoke 3. It has become.

前側スプリング９は外周形状が平面視四角形の環状の板ばねであり、内周側部９ａと外周側部９ｂとが設けてあり、内周側部９ａはレンズ支持体７に取り付けてあり、外周側部９ｂはヨーク３と前側筐体部６との間に挟持して固定されている。内周側部９ａと外周側部９ｂとは弾性変形可能な腕部９ｃにより連結してある。腕部９ｃは本実施の形態では、４箇所に設けてあり、図４に示すように、外周側部９ｂにおいて各腕部９ｃの端２１は角部から周方向にずれた位置にある。前側スプリング９の各角部には前側筐体部６の脚部６ａを配置する切除部１８が形成してある。この切除部１８は前側筐体部６の接着剤流入孔６ｂの位置に対応して設けてある。   The front spring 9 is an annular leaf spring having a rectangular outer shape in plan view, and is provided with an inner peripheral side portion 9a and an outer peripheral side portion 9b. The inner peripheral side portion 9a is attached to the lens support 7 and The side portion 9 b is sandwiched and fixed between the yoke 3 and the front housing portion 6. The inner peripheral side portion 9a and the outer peripheral side portion 9b are connected by an elastically deformable arm portion 9c. In the present embodiment, the arm portions 9c are provided at four locations, and as shown in FIG. 4, the end 21 of each arm portion 9c is shifted from the corner portion in the circumferential direction on the outer peripheral side portion 9b. At each corner portion of the front spring 9, a cutout portion 18 for arranging the leg portion 6 a of the front housing portion 6 is formed. The cut portion 18 is provided corresponding to the position of the adhesive inflow hole 6 b of the front housing portion 6.

前側スプリング９の外周側部９ｂにおいて、腕部９ｃの端２１の位置と切除部（接着剤流入孔との対面位置）１８との間には、外周側部９ｂにおける内周縁と外周縁との間の幅を狭くした幅狭部２３が形成されている。本実施の形態では、幅狭部２３は外周側部９ｂの外周縁に凹部２４を形成することにより、その幅を狭くしている。   In the outer peripheral side portion 9b of the front spring 9, between the position of the end 21 of the arm portion 9c and the cut portion (facing position with the adhesive inflow hole) 18, there is an inner peripheral edge and an outer peripheral edge in the outer peripheral side portion 9b. A narrow portion 23 in which the width between them is narrowed is formed. In the present embodiment, the width of the narrow portion 23 is narrowed by forming the recess 24 on the outer peripheral edge of the outer peripheral side portion 9b.

後側スプリング１１は、図５及び図６に示すように、全体として環状の板ばねであるが、本実施の形態では、左右に分割した一方側部３０と他方側部３２とから構成されている。後側スプリング１１の各外周側部１１ｂ、１１ｂは、絶縁体（スペーサ）１７を介して後側筐体部５とヨーク３との間に挟持されており、絶縁体１７は後側スプリング１１とヨーク３との間の電気的絶縁を図っている。各内周側部１１ａ、１１ａは、レンズ支持体７の後端に取り付けてある。後側スプリング１１の各内周側部１１ａと外周側部１１ｂとは弾性変形可能な腕部１１ｃにより連結してある。   As shown in FIGS. 5 and 6, the rear spring 11 is an annular leaf spring as a whole. In the present embodiment, the rear spring 11 is composed of one side portion 30 and the other side portion 32 divided into left and right. Yes. The outer peripheral side portions 11 b and 11 b of the rear spring 11 are sandwiched between the rear housing portion 5 and the yoke 3 via an insulator (spacer) 17, and the insulator 17 is connected to the rear spring 11. Electrical insulation with the yoke 3 is intended. The inner peripheral side portions 11 a and 11 a are attached to the rear end of the lens support 7. Each inner peripheral side portion 11a and outer peripheral side portion 11b of the rear spring 11 are connected by an elastically deformable arm portion 11c.

本実施の形態では、後側スプリング１１を構成する一方側部３０には端子３３が形成されており、他方側部３２には端子３５が形成されて各端子３３、３５が電源供給端子に接続されるようになっている。尚、一方側部３０と他方側部３２とは、各々コイル１５にハンダ付け等により電気的に接続されており、後側スプリング１１からコイル１５に通電するようになっている。   In the present embodiment, a terminal 33 is formed on one side 30 constituting the rear spring 11, and a terminal 35 is formed on the other side 32, and each terminal 33, 35 is connected to a power supply terminal. It has come to be. The one side portion 30 and the other side portion 32 are electrically connected to the coil 15 by soldering or the like, respectively, so that the coil 15 is energized from the rear spring 11.

これらの前側スプリング９と後側スプリング１１とは、組立て前の自然状態（前側筐体部６を組付ける前の状態）において平坦であるが（図５及び図６参照）、少なくとも前側スプリング９は、組み付け後には図３に示すように、内周側部９ａが外周側部９ｂよりも前方に位置するように弾性変形した状態で取り付けてある。これにより、腕部９ｃの復帰力により内周側部９ａがレンズ支持体７を後側筐体部５側に向けた付勢力で常時付勢するようにしている。   The front spring 9 and the rear spring 11 are flat in a natural state before assembly (a state before the front housing portion 6 is assembled) (see FIGS. 5 and 6), but at least the front spring 9 is After assembly, as shown in FIG. 3, the inner peripheral side portion 9a is attached in an elastically deformed state so as to be positioned in front of the outer peripheral side portion 9b. Accordingly, the inner peripheral side portion 9a constantly urges the lens support 7 with the urging force directed toward the rear housing portion 5 by the restoring force of the arm portion 9c.

次に、本発明の実施の形態に係るレンズ駆動装置１の組立て、作用及び効果について説明する。レンズ駆動装置１の組立ては、図５に示すように、後側筐体部５に後側スプリング１１、スペーサ１７、マグネット１３を内部に固定したヨーク３、コイル１５を固定したキャリア７、前側スプリング９及び前側筐体部６を組み付ける。後側筐体部５と前側筐体部６との組み付けにおいては、前側筐体部６の脚部６ａを後側筐体部５の外壁５ａの外周側に配置して、脚部６ａの先端を段部５ｃに当接させる。   Next, assembly, operation, and effects of the lens driving device 1 according to the embodiment of the present invention will be described. As shown in FIG. 5, the lens driving device 1 is assembled by the rear housing 11, the rear spring 11, the spacer 17, the yoke 3 with the magnet 13 fixed inside, the carrier 7 with the coil 15 fixed, and the front spring. 9 and the front housing part 6 are assembled. In assembling the rear housing portion 5 and the front housing portion 6, the leg portion 6 a of the front housing portion 6 is arranged on the outer peripheral side of the outer wall 5 a of the rear housing portion 5, and the tip of the leg portion 6 a Is brought into contact with the stepped portion 5c.

各部品を組み付けた後、前側筐体部６に形成してある接着剤流入孔６ｂから接着剤Ｓ（図１及び図２参照）を注入する。本実施の形態では、接着剤Ｓは熱硬化接着剤である。接着剤Ｓは、接着剤流入孔６ｂから注入されると、ヨーク３の外周壁３ａと前側筐体部６の脚部６ａとの間に注入され、更に、後側筐体部５の外壁５ａとヨーク３の外周壁３ａの間、及び段部５ｃに注入される。   After assembling each component, the adhesive S (see FIGS. 1 and 2) is injected from the adhesive inflow hole 6b formed in the front housing portion 6. In the present embodiment, the adhesive S is a thermosetting adhesive. When the adhesive S is injected from the adhesive inflow hole 6b, the adhesive S is injected between the outer peripheral wall 3a of the yoke 3 and the leg portion 6a of the front housing part 6, and further, the outer wall 5a of the rear housing part 5 is injected. And the outer peripheral wall 3a of the yoke 3 and the step 5c.

次に、レンズ駆動装置１を加熱すると、熱硬化接着剤は一時的に流動化して粘性が低くなる為、図１及び図２に示すように、毛細管現象により、接着剤Ｓは前側筐体部６と前側スプリング９の外周側部９ｂとの間、および前側スプリング９の外周側部９ｂとヨーク３の隙間をスプリングの外周側部９ｂの面に沿って周方向に流れる。尚、図２及び後述する図８、図９において、ハッチで示す接着剤Ｓはヨーク３とスプリングの外周側部９ｂとの間の接着剤の流れを示している。   Next, when the lens driving device 1 is heated, the thermosetting adhesive is temporarily fluidized and has a low viscosity. Therefore, as shown in FIGS. 6 and the outer peripheral side portion 9b of the front spring 9 and the clearance between the outer peripheral side portion 9b of the front spring 9 and the yoke 3 in the circumferential direction along the surface of the outer peripheral side portion 9b of the spring. In FIG. 2 and FIGS. 8 and 9 described later, an adhesive S indicated by hatching indicates the flow of the adhesive between the yoke 3 and the outer peripheral side portion 9b of the spring.

前側スプリング９の外周側部９ｂにおいて、切除部（接着剤流入孔との対面位置）１８と腕部９ｃの端２１との間には幅狭部２３を形成しているので、幅狭部２３を流れる接着剤Ｓの流量を少なくでき、流動抵抗となって、流動化した接着剤Ｓが腕部端２１の位置まで到達するのを防止する。その後、一時的に流動化した接着剤Ｓは熱硬化により粘性が高まり、硬化する。   In the outer peripheral side portion 9b of the front spring 9, a narrow portion 23 is formed between the cut portion (position facing the adhesive inflow hole) 18 and the end 21 of the arm portion 9c. It is possible to reduce the flow rate of the adhesive S flowing through the flow path, and it becomes a flow resistance, thereby preventing the fluidized adhesive S from reaching the position of the arm end 21. Thereafter, the temporarily fluidized adhesive S increases in viscosity due to heat curing and is cured.

従って、接着剤Ｓが流動化したときに接着剤Ｓが前側スプリング９の腕部９ｃの基端２１にまで到達しないから、腕部９ｃがヨーク３に接着固定されることがなく、腕部９ｃが弾性変形機能を損なうことを防止できる。   Therefore, when the adhesive S is fluidized, the adhesive S does not reach the base end 21 of the arm 9c of the front spring 9, so that the arm 9c is not bonded and fixed to the yoke 3 and the arm 9c. Can prevent the elastic deformation function from being impaired.

また、接着剤Ｓが流動化したときに、スプリング９の外周側部９ｂに到達した場合には、ヨーク３の溝１６が、毛細管現象により接着剤Ｓがスプリング９の外周側部９ｂから食み出すことを防止できるので、接着剤Ｓが前側スプリング９の腕部９ｃにかかるのを防止できる。   Further, when the adhesive S is fluidized and reaches the outer peripheral side 9b of the spring 9, the groove 16 of the yoke 3 causes the adhesive S to erode from the outer peripheral side 9b of the spring 9 due to capillary action. Since it can prevent taking out, it can prevent that the adhesive agent S applies to the arm part 9c of the front side spring 9. FIG.

尚、本実施の形態に係るレンズ駆動装置１の駆動は、端子３３、３５からコイル１５に通電すると、コイル１５に作用する電磁力で、レンズ支持体７は前側スプリング９及び後側スプリング１１の付勢力に抗して移動し、スプリング９、１１との力の釣り合う位置で停止する。   The lens driving device 1 according to the present embodiment is driven by the electromagnetic force acting on the coil 15 when the coil 15 is energized from the terminals 33 and 35, and the lens support 7 has the front spring 9 and the rear spring 11. It moves against the urging force and stops at a position where the forces of the springs 9 and 11 are balanced.

本発明は、上述した実施の形態に限らず、本発明の要旨を逸脱しない範囲で種々変形可能である。   The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

例えば、前側筐体部６、後側筐体部５、スプリング９は、平面視四角形状にすることに限らず、平面視円形としてもよく、形状は限定されない。   For example, the front housing part 6, the rear housing part 5, and the spring 9 are not limited to a square shape in plan view but may be circular in plan view, and the shape is not limited.

実施の形態において、スプリング９の外周側部９ｂに形成する幅狭部２３は、外周側部９ｂの外周縁を凹ませて形成することに限らず、内周縁を凹ませて形成してもよいし、内周縁と外周縁との両縁を凹ませて形成してもよい。   In the embodiment, the narrow portion 23 formed on the outer peripheral side portion 9b of the spring 9 is not limited to being formed by denting the outer peripheral edge of the outer peripheral side portion 9b, but may be formed by denting the inner peripheral edge. And you may form by denting both edges of an inner periphery and an outer periphery.

図８に示すように、スプリング９の外周側部９ｂにおいて、接着剤流入孔との対面位置１８と腕部の接続端２１との間に形成した孔２５により、幅狭部２３を形成するものであってよい。尚、孔２５は丸穴であってもよく形状は限定されない。   As shown in FIG. 8, in the outer peripheral side portion 9b of the spring 9, the narrow portion 23 is formed by the hole 25 formed between the facing position 18 with the adhesive inflow hole and the connecting end 21 of the arm portion. It may be. The hole 25 may be a round hole, and the shape is not limited.

図９に示すように、スプリング９の腕部端２１は、スプリング９の角部に設け、接着剤の注入に対面する位置１８と腕部端２１との間に孔２５を形成して幅狭部２３を形成するものであってもよい。   As shown in FIG. 9, the arm end 21 of the spring 9 is provided at the corner of the spring 9, and a hole 25 is formed between the position 18 facing the injection of the adhesive and the arm end 21 to narrow the end. The part 23 may be formed.

尚、実施の形態において「凹部２４」は金型成形時に形成するものであり、成形後に切り除くものではないが、金型成形後に切り除いて凹部２４を形成するものであってもよい。   In the embodiment, the “recess 24” is formed at the time of molding the mold and is not cut off after molding, but may be formed by cutting off after molding the mold.

また、スプリング９の外周側部９ｂに対面する隣接部材は、ヨーク３や前側筐体部９に限らず、スペーサであっても良く、例えば、ヨーク３に形成した溝１６に代えて、スプリング９の隣接部材がスペーサである場合には、スペーサに溝や孔を形成するものでも良い。   Further, the adjacent member facing the outer peripheral side portion 9b of the spring 9 is not limited to the yoke 3 or the front housing portion 9, but may be a spacer. For example, instead of the groove 16 formed in the yoke 3, the spring 9 When the adjacent member is a spacer, a groove or a hole may be formed in the spacer.

更に、接着剤Ｓは熱硬化接着剤に限定されず、常温で粘性が低いものを用いてもよい。   Furthermore, the adhesive S is not limited to a thermosetting adhesive, and an adhesive having a low viscosity at room temperature may be used.

接着剤注入孔６ｂは、前側筐体部６の前側への配置に限定されず、前側筐体部６の外周側面に配置してもよい。   The adhesive injection hole 6 b is not limited to the arrangement on the front side of the front casing 6, and may be arranged on the outer peripheral side surface of the front casing 6.

実施の形態に係るレンズ駆動装置において、接着剤が流動化したときのヨーク、スプリング及び前側筐体部との関係を示す断面図である。In the lens drive device which concerns on embodiment, it is sectional drawing which shows the relationship between a yoke, a spring, and a front side housing | casing part when an adhesive agent is fluidized. 図１における接着剤の流れを説明する為、前側筐体部を除いて示す平面図である。FIG. 2 is a plan view illustrating a flow of an adhesive in FIG. 1 excluding a front housing portion. 図７のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 前側スプリング（スプリング）の平面図である。It is a top view of a front side spring (spring). 実施の形態に係るレンズ駆動装置を前側から見た分解斜視図である。It is the disassembled perspective view which looked at the lens drive device concerning an embodiment from the front side. 実施の形態に係るレンズ駆動装置を後側から見た分解斜視図である。It is the disassembled perspective view which looked at the lens drive device which concerns on embodiment from the back side. 図５に示すレンズ駆動装置の斜視図である。It is a perspective view of the lens drive device shown in FIG. 本発明の変形例であって、スプリングの外周側部を部分的に示す平面図である。It is a modification of this invention, Comprising: It is a top view which shows the outer peripheral side part of a spring partially. 本発明の変形例であって、スプリングの外周側部を部分的に示す平面図である。It is a modification of this invention, Comprising: It is a top view which shows the outer peripheral side part of a spring partially. 従来技術における接着剤が流動化したときのヨーク、スプリング及び前側筐体部との関係を示す断面図である。It is sectional drawing which shows the relationship between a yoke, a spring, and a front side housing | casing part when the adhesive agent in a prior art is fluidized. 図１０における接着剤の流れを説明する為、前側筐体部を除いて示す平面図である。FIG. 11 is a plan view illustrating a flow of an adhesive in FIG. 10 excluding a front housing portion.

符号の説明Explanation of symbols

１ レンズ駆動装置
３ ヨーク
６ 前側筐体部（筐体部）
６ｂ 接着剤流入孔
７ レンズ支持体
９ 前側スプリング（スプリング）
１３ マグネット
１５ コイル
１６ 溝（隣接部材の溝）
１８ 切除部（接着剤流入孔との対面位置）
２１ 腕部の基端
２３ 幅狭部
Ｓ 接着剤 DESCRIPTION OF SYMBOLS 1 Lens drive device 3 Yoke 6 Front side housing | casing part (housing | casing part)
6b Adhesive inflow hole 7 Lens support 9 Front spring (spring)
13 Magnet 15 Coil 16 Groove (groove of adjacent member)
18 Cut section (position facing the adhesive inflow hole)
21 Base end of arm part 23 Narrow part S Adhesive

Claims (5)

環状のヨークと、ヨークの内周側に配置され且つ外周にコイルが固定されたレンズ支持体と、マグネットと、スプリングと、筐体部とを備え、マグネットはヨークの外周壁の内周側に配置されており、スプリングは内周側部と、外周側部と、内周側部と外周側部とを連結する腕部とを有し、内周側部をレンズ支持体に固定し且つ外周側部をヨークと筐体部との間に配置してあり、ヨークに対してレンズ支持体を光軸方向に移動自在に支持しており、コイルに通電して生じる電磁力によりレンズ支持体をレンズの光軸方向に沿って前後に移動するレンズ駆動装置であって、
筐体部には接着剤注入孔が設けてあり、筐体部の接着剤注入孔から注入した接着剤でスプリングの外周側部をその隣接部材に接着固定しており、スプリングの外周側部において接着剤流入孔との対面位置と腕部の接続端との間には、内周縁又は外周縁との間における幅を狭くした幅狭部を形成してあることを特徴とするレンズ駆動装置。 An annular yoke, a lens support that is disposed on the inner peripheral side of the yoke and has a coil fixed to the outer periphery, a magnet, a spring, and a housing, are provided on the inner peripheral side of the outer peripheral wall of the yoke. The spring has an inner peripheral side portion, an outer peripheral side portion, and an arm portion that connects the inner peripheral side portion and the outer peripheral side portion, and fixes the inner peripheral side portion to the lens support and the outer periphery. The side portion is disposed between the yoke and the housing portion, and the lens support is supported so as to be movable in the optical axis direction with respect to the yoke. The lens support is supported by electromagnetic force generated by energizing the coil. A lens driving device that moves back and forth along the optical axis direction of the lens,
An adhesive injection hole is provided in the casing, and the outer peripheral side of the spring is bonded and fixed to the adjacent member with the adhesive injected from the adhesive injection hole of the casing. A lens driving device characterized in that a narrow portion with a narrow width between the inner peripheral edge or the outer peripheral edge is formed between the position facing the adhesive inflow hole and the connection end of the arm portion. 幅狭部は、スプリングの外周側部に形成した孔或いは、内周縁又は外周縁に形成した凹みにより形成していることを特徴とする請求項１に記載のレンズ駆動装置。   2. The lens driving device according to claim 1, wherein the narrow portion is formed by a hole formed in an outer peripheral side portion of the spring or a recess formed in an inner peripheral edge or an outer peripheral edge. スプリングの外周側部の隣接部材には、少なくともスプリングの腕部端に位置する部位に溝又は孔が設けてあることを特徴とする請求項１又は２に記載のレンズ駆動装置。   The lens driving device according to claim 1, wherein a groove or a hole is provided in an adjacent member on an outer peripheral side portion of the spring at least at a portion located at an end of the arm portion of the spring. 請求項１〜３の何れか一項に記載のレンズ駆動装置を備えることを特徴とするカメラ。   A camera comprising the lens driving device according to claim 1. 請求項４に記載のカメラを搭載したことを特徴とするカメラ付き携帯電話。   A camera-equipped mobile phone comprising the camera according to claim 4.
JP2007035753A 2007-02-16 2007-02-16 Lens driving device, camera and camera-equipped mobile phone Active JP4899912B2 (en)

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JP2009139941A (en) * 2007-11-14 2009-06-25 Nidec Sankyo Corp Lens drive device, and spring member bonding method
JP2011033887A (en) * 2009-08-03 2011-02-17 Fujifilm Corp Lens device
KR20110029345A (en) * 2009-09-15 2011-03-23 엘지이노텍 주식회사 Voice coil motor and manufacturing method of the same
JP2013222055A (en) * 2012-04-16 2013-10-28 Dainippon Printing Co Ltd Camera module driving mechanism and leaf spring
KR101566969B1 (en) * 2009-02-17 2015-11-09 엘지이노텍 주식회사 Motor for driving lens
KR20150126807A (en) * 2015-10-30 2015-11-13 엘지이노텍 주식회사 Motor for driving lens
JP2016167084A (en) * 2016-04-19 2016-09-15 大日本印刷株式会社 Camera module driving mechanism and leaf spring

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JP2009139941A (en) * 2007-11-14 2009-06-25 Nidec Sankyo Corp Lens drive device, and spring member bonding method
KR101566969B1 (en) * 2009-02-17 2015-11-09 엘지이노텍 주식회사 Motor for driving lens
JP2011033887A (en) * 2009-08-03 2011-02-17 Fujifilm Corp Lens device
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KR101675122B1 (en) 2009-09-15 2016-11-11 엘지이노텍 주식회사 Voice coil motor and manufacturing method of the same
JP2013222055A (en) * 2012-04-16 2013-10-28 Dainippon Printing Co Ltd Camera module driving mechanism and leaf spring
KR20150126807A (en) * 2015-10-30 2015-11-13 엘지이노텍 주식회사 Motor for driving lens
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JP2016167084A (en) * 2016-04-19 2016-09-15 大日本印刷株式会社 Camera module driving mechanism and leaf spring

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