JP2006091277A

JP2006091277A - Macro-photographic lens with switching function

Info

Publication number: JP2006091277A
Application number: JP2004275063A
Authority: JP
Inventors: Michiyoshi Saura; 通義佐浦; Etsuo Ishikawa; 悦夫石川
Original assignee: Kantatsu Co Ltd
Current assignee: Kantatsu Co Ltd
Priority date: 2004-09-22
Filing date: 2004-09-22
Publication date: 2006-04-06

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the size of a small type photographic module without disposing a component in a position where it intercepts the optical path of a lens, and to prevent an adverse effect caused by, for instance, wear powder that is generated when an extensible body rotates. <P>SOLUTION: The small type photographic module 1 comprises a holder 10, a spring 35, an extendible body 20, a barrel 40 incorporating a lens 41, and an operation knob 50. The lens barrel 40 is attached to the extendible body 20 such that when the operation knob 50 is rotated, the rotation is transmitted to the extendible body 20 integrated with the operation knob 50 and the extendible body 20 is rotated along peripheral wall parts 11 of the holder 10. The lens barrel 40 moves in the direction of the optical axis such that cam receivers 23 and the first and second horizontal cam faces 25 and 26 engage with each other in a regular photographing position and a macro-photographing position. The focal point is switched between the regular photographing position and a macro-photographing position. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、光学系機器における切換機能を備えたマクロ撮影用レンズに関し、特に通常撮影モードとマクロ撮影モードの切り換え操作が可能となる切換機能を備えたマクロ撮影用レンズに関する。 The present invention relates to a macro photographing lens having a switching function in an optical system device, and more particularly to a macro photographing lens having a switching function that enables a switching operation between a normal photographing mode and a macro photographing mode.

近年、例えば、携帯型のコンピュータやテレビ電話、携帯電話等に搭載されるＣＣＤ、ＣＭＯＳ等の固体撮像素子を利用したイメージセンサの需要が高まっている。この種のイメージセンサとして、例えば、携帯電話などに搭載するイメージセンサとして、特許文献１に示すように、撮像素子、レンズ部材、フィルタ及び絞り部材等の部品を１つのパッケージに収めて一体化した小型撮像モジュールが知られている。また、この種の小型撮像モジュールにおいて、特許文献２には、通常撮影距離より近距離側にあるマクロ撮影領域の被写体を撮影するマクロ機能を備えた小型撮像モジュールが知られている。 In recent years, there has been an increasing demand for image sensors using solid-state image sensors such as CCDs and CMOSs mounted on portable computers, videophones, mobile phones, and the like. As an image sensor of this type, for example, as an image sensor mounted on a mobile phone or the like, as shown in Patent Document 1, components such as an image sensor, a lens member, a filter, and a diaphragm member are housed in a single package and integrated. Small imaging modules are known. In addition, in this type of small imaging module, Patent Document 2 discloses a small imaging module having a macro function for photographing a subject in a macro photographing region that is closer to the normal photographing distance.

このような、撮像装置は、ユニット化されることで部品点数の削減やコンパクト化が図られているため、携帯電話などへの搭載も容易であるが、近年、携帯電話にカメラ機能として搭載される撮像装置は、より高度な機能が要求されるようになってきており、特許文献２で開示されている小型撮像モジュールは、通常撮影とマクロ撮影とが切換え可能である。すなわち、特許文献２で開示されている小型撮像モジュールでは、レンズを組み込んだ鏡筒を内蔵する繰出しリングの外径部に多条雄ネジが形成され、その多条雄ネジがホルダの取り付け孔の内径部に形成する多条雌ネジに螺着され、繰出しリングを所定角度回動させることによって、ホルダに対して繰出しリングと、この繰出しリングに組み込まれた鏡筒がレンズの光軸方向に移動するように構成している。そして、繰出しリングには、該繰出しリングを回動操作するための操作ノブが一体的に固定され、その操作ノブの外周に一定長さに渡って扇型のストッパ凸部が形成されるとともに、ホルダの取り付け孔の周囲にはマクロ撮影用ストッパと通常撮影用ストッパが突設されている。そして、これらマクロ撮影用ストッパと通常撮影用ストッパとの間に操作ノブのストッパ凸部が配置され、マクロ撮影用ストッパと通常撮影用ストッパで操作ノブの回動範囲を規制することによって、マクロ撮影位置と通常撮影位置でレンズの位置を保持している。
特開２００３−２８９４５９号公報特開２００３−３３７２７９号公報 Such an image pickup apparatus is unitized to reduce the number of parts and to be compact, so that it can be easily mounted on a mobile phone or the like. More advanced functions are required for the image pickup apparatus, and the small image pickup module disclosed in Patent Document 2 can be switched between normal shooting and macro shooting. That is, in the small-sized imaging module disclosed in Patent Document 2, a multi-threaded male screw is formed on the outer diameter portion of a feeding ring that houses a lens barrel incorporating a lens, and the multi-threaded male screw serves as a mounting hole of the holder. Screwed onto a multi-thread female screw formed on the inner diameter, and by rotating the feeding ring by a predetermined angle, the feeding ring and the lens barrel incorporated in the feeding ring move in the optical axis direction of the lens. It is configured to do. An operation knob for rotating the supply ring is integrally fixed to the supply ring, and a fan-shaped stopper convex portion is formed on the outer periphery of the operation knob over a certain length. A macro shooting stopper and a normal shooting stopper protrude from the holder mounting hole. The stopper projection of the operation knob is arranged between the macro shooting stopper and the normal shooting stopper, and the macro shooting stopper and the normal shooting stopper are used to regulate the rotation range of the operation knob. The position of the lens is held at the normal shooting position.
JP 2003-289459 A JP 2003-337279 A

特許文献２で開示されている小型撮像モジュールでは、繰出しリングの外径部に形成する多条雄ネジをホルダに形成する多条雌ネジに螺着し、繰出しリングを所定角度回動させることによって、ホルダに対して繰出しリングと、この繰出しリングに組み込まれた鏡筒がレンズの光軸方向に移動するように構成するものであるから、ホルダと繰出しリングに形成する多条雌ネジの噛み合いがきついと、通常撮影とマクロ撮影との切換えがスムーズに行なえず、逆に多条雌ネジの噛み合いが緩いと、ホルダに対して繰出しリングがガタ付きことから、ホルダと繰出しリングに形成する多条雌ネジの成形には高精度が要求されるばかりでなく、ホルダと繰出しリングの底部との間に多条雌ネジ間のガタ付き抑えるためのリング状の弾性体が介在している。この弾性体は、レンズと撮影素子との間に位置しているため、この弾性体はレンズの光路を遮らないようレンズの光路より径大に形成する必要があり、このような弾性体の制約によって、小型撮像モジュールの小型化が困難となる。さらに、ホルダの多条雌ネジに繰出しリングの多条雌ネジをねじ込んだ際、ホルダと繰出しリングとの間に介在する弾性体が繰出しリングの回転と追従して回転し、磨耗粉が発生する場合があり、その磨耗粉が撮影素子に付着するなどして光学的に悪影響を及ぼすといった課題を有している。 In the small imaging module disclosed in Patent Document 2, a multi-thread male screw formed on the outer diameter portion of the feed ring is screwed to a multi-thread female screw formed on the holder, and the feed ring is rotated by a predetermined angle. Since the feeding ring with respect to the holder and the lens barrel incorporated in the feeding ring move in the optical axis direction of the lens, the engagement of the multi-thread female screw formed on the holder and the feeding ring is Switching between normal shooting and macro shooting cannot be performed smoothly, and conversely, if the engagement of the multi-thread female screw is loose, the feeding ring is loose with respect to the holder. In addition to the high precision required for forming the female thread, a ring-shaped elastic body is interposed between the holder and the bottom of the feeding ring to prevent backlash between the multiple female threads. That. Since this elastic body is located between the lens and the imaging element, this elastic body must be formed larger in diameter than the optical path of the lens so as not to block the optical path of the lens. This makes it difficult to reduce the size of the small imaging module. Further, when the multi-thread female screw of the feeding ring is screwed into the multi-thread female screw of the holder, the elastic body interposed between the holder and the feeding ring rotates following the rotation of the feeding ring, and wear powder is generated. In some cases, there is a problem that the wear powder adheres to the imaging element and has an optical adverse effect.

本発明は、前記事情に鑑みなされたもので、通常撮影モードとマクロ撮影モードの切り換えをスムーズに行えるとともに、レンズの光路を遮ぎる部品を省略して、小型撮像モジュールの小型化を図るとともに、磨耗粉などによる悪影響を防止することができる切換機能を備えたマクロ撮影用レンズを提供することを目的とする。 The present invention has been made in view of the above circumstances, and can smoothly switch between the normal shooting mode and the macro shooting mode, omits components that block the optical path of the lens, and reduces the size of the small imaging module. An object of the present invention is to provide a macro photographing lens having a switching function capable of preventing an adverse effect due to abrasion powder or the like.

本発明の請求項１記載の切換機能を備えたマクロ撮影用レンズは、円筒状の周壁部を有するホルダと、周壁部の内側に組み込まれる円筒壁を有するとともに、該円筒壁の内側にレンズを組み込んだ鏡筒を内蔵する繰出し体と、この繰出し体に一体的に固定される操作ノブと、前記周壁部に形成するカムと、このカムと対応して前記繰出し体に形成するカム受けとを備え、この操作ノブによって前記繰出しリングを所定角度回動して前記カムとカム受けとの係合によって前記レンズを光軸方向に移動させて該レンズの焦点距離を切り換えるように構成したことを特徴とする。 A macro imaging lens having a switching function according to claim 1 of the present invention has a holder having a cylindrical peripheral wall portion, a cylindrical wall incorporated inside the peripheral wall portion, and a lens inside the cylindrical wall. A feeding body having a built-in lens barrel; an operation knob fixed integrally to the feeding body; a cam formed on the peripheral wall; and a cam receiver formed on the feeding body corresponding to the cam. The operation ring is configured to rotate the feeding ring by a predetermined angle and move the lens in the optical axis direction by the engagement between the cam and the cam receiver to switch the focal length of the lens. And

請求項１の構成により、繰出し体を回転させることによって、カム受けがカムに係合した状態から繰出し体を回転させ、該カムと隣接する高さが異なるカムに係合させることによって、レンズが光軸方向に移動してレンズの焦点距離が切り換わる。これにより、カムの数に対応してレンズの焦点距離を切り換えることが可能となる。 According to the structure of claim 1, by rotating the feeding body, the feeding body is rotated from a state where the cam receiver is engaged with the cam, and the lens is engaged by engaging with a cam having a different height adjacent to the cam. The focal length of the lens is switched by moving in the optical axis direction. Thereby, the focal length of the lens can be switched in accordance with the number of cams.

本発明の請求項２記載の切換機能を備えたマクロ撮影用レンズは、請求項１記載の切換機能を備えたマクロ撮影用レンズにおいて、前記カムが前記周壁部の外周に形成され、段差状に連続する複数のカム面を備え、一方、前記カム受けは前記円筒壁の上端縁に一体形成するフランジ部から垂設して前記カム面に下面側から係合するとともに、前記ホルダには、前記フランジ部を上方側に押圧して前記カム受けを前記カム面に押し付ける付勢手段を設けたことを特徴とする。 According to a second aspect of the present invention, there is provided a macro photographing lens having the switching function according to the first aspect, wherein the cam is formed on an outer periphery of the peripheral wall portion and is stepped. The cam receiver includes a plurality of continuous cam surfaces, and the cam receiver is suspended from a flange portion formed integrally with an upper end edge of the cylindrical wall and engaged with the cam surface from the lower surface side. Biasing means is provided for pressing the cam receiver against the cam surface by pressing the flange portion upward.

請求項２の構成により、カム受けとカムとの係合時において、繰出し体のフランジ部とホルダとの間に介在する付勢手段によってカム受けがカム面に押し付けられるから、繰出し体がガタ付きことなく、ホルダに対して確実に保持される。 According to the configuration of the second aspect, when the cam receiver and the cam are engaged, the cam receiver is pressed against the cam surface by the urging means interposed between the flange portion of the supply body and the holder. Without being held securely against the holder.

本発明の請求項３記載の切換機能を備えたマクロ撮影用レンズは、請求項２記載の切換機能を備えたマクロ撮影用レンズにおいて、前記付勢手段が、バネと、このバネによって付勢される押圧ピンによって構成され、これらバネと押圧ピンを装着するボス部を前記ホルダの周壁部の外側に一体形成したことを特徴とする。 According to a third aspect of the present invention, there is provided a macro photographing lens having a switching function, wherein the biasing means is biased by a spring and the spring. And a boss portion for mounting the spring and the pressure pin is integrally formed on the outer side of the peripheral wall portion of the holder.

請求項３の構成により、カム受けをカム面に押し付ける付勢手段としてのバネは、ホルダの周壁部に形成するボス部に組付けられて繰出し体のフランジ部とホルダとの間に介在するから、バネがレンズと撮影素子との間に位置してレンズの光路を遮ることが無いとともに、繰出し体の回転に伴って押圧ピンとフランジ部とが擦れて磨耗粉が発生したとしてもレンズと撮影素子との間に入り込む心配もない。 According to the structure of claim 3, the spring as the biasing means for pressing the cam receiver against the cam surface is assembled to the boss formed on the peripheral wall portion of the holder and is interposed between the flange portion of the feeding body and the holder. Even if the spring is positioned between the lens and the imaging element so as not to block the optical path of the lens, and the pressing pin and the flange portion are rubbed with the rotation of the feeding body, wear powder is generated. There is no worry about getting in between.

本発明の請求項１記載の切換機能を備えたマクロ撮影用レンズによれば、円筒状の周壁部を有するホルダと、周壁部の内側に組み込まれる円筒壁を有するとともに、該円筒壁の内側にレンズを組み込んだ鏡筒を内蔵する繰出し体と、この繰出し体に一体的に固定される操作ノブと、前記周壁部に形成するカムと、このカムと対応して前記繰出し体に形成するカム受けとを備え、この操作ノブによって前記繰出しリングを所定角度回動して前記カムとカム受けとの係合によって前記レンズを光軸方向に移動させて該レンズの焦点距離を切り換えるように構成したものであるから、カム形状によって簡単に任意位置でレンズの焦点距離を簡単に切り換えることができ、多条雌ネジの噛み合いよって焦点の切り換えを行う従来構造に比べ、高精度も要求されないから、成形加工も容易である。 According to the macro photographing lens having the switching function according to the first aspect of the present invention, the holder has a cylindrical peripheral wall portion, the cylindrical wall incorporated inside the peripheral wall portion, and on the inner side of the cylindrical wall. A feeding body incorporating a lens barrel incorporating a lens; an operation knob fixed integrally to the feeding body; a cam formed on the peripheral wall; a cam receiver formed on the feeding body corresponding to the cam; The operation ring is configured to rotate the feeding ring by a predetermined angle and move the lens in the optical axis direction by the engagement between the cam and the cam receiver to switch the focal length of the lens. Therefore, the focal length of the lens can be easily switched at an arbitrary position easily by the cam shape, and higher accuracy than the conventional structure in which the focus is switched by meshing of multiple female threads. Since not sought, molding is easy.

本発明の請求項２記載の切換機能を備えたマクロ撮影用レンズによれば、請求項１記載の切換機能を備えたマクロ撮影用レンズにおいて、前記カムが前記周壁部の外周に形成され、段差状に連続する複数のカム面を備え、一方、前記カム受けは前記円筒壁の上端縁に一体形成するフランジ部から垂設して前記カム面に下面側から係合するとともに、前記ホルダには、前記フランジ部を上方側に押圧して前記カム受けを前記カム面に押し付ける付勢手段を設けたものであるから、繰出し体のフランジ部とホルダとの間に介在する付勢手段によってカム受けをカム面に押し付けた状態で繰出し体のガタ付きを防止してホルダに対して繰出し体を確実に保持することができる。 According to the macro photographing lens having the switching function according to claim 2 of the present invention, in the macro photographing lens having the switching function according to claim 1, the cam is formed on an outer periphery of the peripheral wall portion. A plurality of cam surfaces continuous in a shape, and the cam receiver is suspended from a flange portion integrally formed on the upper end edge of the cylindrical wall and engaged with the cam surface from the lower surface side. Since the biasing means for pressing the flange portion upward and pressing the cam receiver against the cam surface is provided, the cam receiver is supported by the biasing means interposed between the flange portion of the feeding body and the holder. In a state in which is pressed against the cam surface, the feeding body can be prevented from rattling and the feeding body can be securely held against the holder.

本発明の請求項３記載の切換機能を備えたマクロ撮影用レンズによれば、請求項２記載の切換機能を備えたマクロ撮影用レンズにおいて、前記付勢手段が、バネと、このバネによって付勢される押圧ピンによって構成され、これらバネと押圧ピンを装着するボス部を前記ホルダの周壁部の外側に一体形成したものであるから、バネがホルダの周壁の外側に配置され、バネによってレンズと撮影素子との間に位置してレンズの光路を遮ることが無い。これにより、小型撮像モジュールの小型化が可能であるとともに、繰出し体の回転に伴って例え、磨耗粉が発生してもレンズと撮影素子との間に入り込んで悪影響を与える心配もない。 According to the macro photographing lens having the switching function according to claim 3 of the present invention, in the macro photographing lens having the switching function according to claim 2, the urging means is attached by a spring and the spring. Since the boss portion for mounting the spring and the pressing pin is integrally formed outside the peripheral wall portion of the holder, the spring is disposed outside the peripheral wall of the holder, and the lens is formed by the spring. It is located between the lens and the imaging element and does not block the optical path of the lens. Thereby, it is possible to reduce the size of the small image pickup module, and there is no fear that even if abrasion powder is generated, it enters between the lens and the imaging element and adversely affects it as the feeding body rotates.

本発明の実施の形態を実施例に基づき図面を参照して説明する。図１は小型撮像モジュールの分解斜視図、図２はカム受けとカムとの係合状態を説明するためにホルダ１０の外周を３６０°展開させた展開図、図３は小型撮像モジュールの平面図、図４は図３のＡ−Ａ線断面図である。同図に示すように、小型撮像モジュール１は、ＣＣＤ等の撮像素子６０が組込まれたホルダ１０、ホルダ１０に組み込まれる繰出し体２０、繰出し体２０を上方に付勢するための付勢手段としてのバネ３５、レンズ４１が組込まれた鏡筒４０等から構成されている。 Embodiments of the present invention will be described based on examples with reference to the drawings. FIG. 1 is an exploded perspective view of a small imaging module, FIG. 2 is a development view in which the outer periphery of the holder 10 is expanded 360 ° to explain the engagement state between the cam receiver and the cam, and FIG. 3 is a plan view of the small imaging module. 4 is a cross-sectional view taken along line AA of FIG. As shown in the figure, the small imaging module 1 includes a holder 10 in which an imaging element 60 such as a CCD is incorporated, a feeding body 20 incorporated in the holder 10, and an urging means for biasing the feeding body 20 upward. And a lens barrel 40 in which a lens 41 is incorporated.

ホルダ１０は、小型撮像モジュールのベースであって、中央に構成部材を組み込む円筒状の周壁部１１を有し、この周壁部１１の内径部に、繰出し体２０を回動自在に組み付けるとともに、底部中央にＣＣＤ等からなる撮像素子６０を保持するように構成されている。また、ホルダ１０の周壁部１１の外周にバネ３５を組み込み複数のボス部１４が一体形成されている。バネ３５は、ボス部１４に形成する座繰り孔１５に組み込まれ、このバネ３５に繰出し体２０を押圧する押圧ピン３６が装着されている。 The holder 10 is a base of a small image pickup module, and has a cylindrical peripheral wall portion 11 in which a constituent member is incorporated at the center, and a feeding body 20 is rotatably assembled to an inner diameter portion of the peripheral wall portion 11 and a bottom portion. An image sensor 60 composed of a CCD or the like is held in the center. A plurality of bosses 14 are integrally formed by incorporating a spring 35 on the outer periphery of the peripheral wall 11 of the holder 10. The spring 35 is incorporated in a counterbore 15 formed in the boss portion 14, and a pressing pin 36 that presses the feeding body 20 is attached to the spring 35.

繰出し体２０は、前記周壁部１１の内側に組み込まれる円筒部２１と、その円筒部２１の上端部から外側に向かって突出するフランジ部２２を有し、円筒部２１の内径部には鏡筒４０に形成された焦点調整用雄ネジ４２と螺合する焦点調整用雌ネジ３３が形成されている。また、フランジ部２２には四組のカム受け２３が垂設され、前記ホルダ１０の周壁部１１の外周面には、前記カム受け２３と係合するカム２４が形成されている。カム２４は、高さが異なる第１及び第２の水平カム面２５，２６と、これら第１及び第２の水平カム面２５，２６を連結する傾斜カム面２７とで構成されている。前記第１及び第２の水平カム面２５，２６の両側にはカム受け２３と当接して、通常撮影位置とマクロ撮影位置で繰出し体２０を保持する回り止め部２８，２９が形成され、さらに、一方の回り止め部２８と隣接して前記カム受け２３を挿通する溝部３０が形成されている。また、フランジ部２２には、繰出し体２０を回転操作するために操作ノブ５０が水平方向に突設するとともに、前記カム受け２３の成形用抜き孔５１及び前記押圧ピン３６の位置決め凹部５２が形成されている。 The feeding body 20 includes a cylindrical portion 21 that is incorporated inside the peripheral wall portion 11 and a flange portion 22 that protrudes outward from the upper end portion of the cylindrical portion 21. A focus adjusting female screw 33 is formed so as to be screwed with the focus adjusting male screw 42 formed in 40. Further, four sets of cam receivers 23 are suspended from the flange portion 22, and a cam 24 that engages with the cam receiver 23 is formed on the outer peripheral surface of the peripheral wall portion 11 of the holder 10. The cam 24 includes first and second horizontal cam surfaces 25 and 26 having different heights, and an inclined cam surface 27 that connects the first and second horizontal cam surfaces 25 and 26. On both sides of the first and second horizontal cam surfaces 25 and 26, there are formed anti-rotation portions 28 and 29 that contact the cam receiver 23 and hold the feeding body 20 in the normal photographing position and the macro photographing position, respectively. A groove 30 for inserting the cam receiver 23 is formed adjacent to one of the rotation stoppers 28. In addition, an operation knob 50 projects horizontally in the flange portion 22 to rotate the feeding body 20, and a molding hole 51 for the cam receiver 23 and a positioning recess 52 for the pressing pin 36 are formed. Has been.

鏡筒４０は、レンズ４１を内蔵し、外径部に繰出し体２０に形成された焦点調整用雌ネジ３３と螺合する焦点調整用雄ネジ４２が形成されている。これら焦点調整用雌ネジ３３と焦点調整用雄ネジ４２との螺合により、鏡筒４０を回動すると、鏡筒４０は繰出し体２０に対して光軸方向に進退移動する。このようにして、鏡筒４０に組み込まれたレンズ４１と撮像素子６０との焦点距離を調整した後、接着剤などによって、鏡筒４０と繰出し体２０とを一体的に固定している。 The lens barrel 40 includes a lens 41, and a focus adjusting male screw 42 that is screwed with a focus adjusting female screw 33 formed on the feeding body 20 is formed on the outer diameter portion. When the lens barrel 40 is rotated by screwing the focus adjustment female screw 33 and the focus adjustment male screw 42, the lens barrel 40 moves forward and backward in the optical axis direction with respect to the feeding body 20. In this manner, after adjusting the focal length between the lens 41 incorporated in the lens barrel 40 and the image sensor 60, the lens barrel 40 and the feeding body 20 are integrally fixed by an adhesive or the like.

以上のように構成される本実施例において、各構成要素の組立構成について説明する。まず、ホルダ１０の底部にＣＣＤ等からなる撮像素子６０を適宜の手段で保持し、周壁部１１のボス部に形成する座繰り孔１５にバネ３５を挿入し、そのバネ３５に押圧ピン３６を組み込む。一方、繰出し体２０の焦点調整用雌ネジ３３に鏡筒４０に形成する焦点調整用雄ネジ４２をねじ込んで繰出し体２０に鏡筒４０に組み込む。そして、ホルダ１０の周壁部１１の内側に繰出し体２０の円筒部２１を嵌め入れる。この時、繰出し体２０に形成するカム受け２３を周壁部１１に形成する溝部３０に合わせながら下方に押し下げ、カム受け２３を一方の回り止め部２８より下方まで押し下げた状態でカム２４側（図２において矢印ｂ）に回転させる。これにより、カム受け２３が回り止め部２８を乗り越えてカム２４（第１の水平カム２５）と係合する。この時、周壁部１１のボス部１４に組み付けたバネ３５がフランジ部２２で押されて圧縮し、そのバネ３５に組付けた押圧ピン３６がフランジ部２２に形成する位置決め凹部５２に嵌り込んだ状態でフランジ部２２を上方側に付勢する。これにより、常時、カム受け２３がカム２４の第1の水平カム面２５に押し付けられ、ホルダ１０に繰出し体２０が保持される。なお、カム受け２３が第1の水平カム面２５に係合した状態ではマクロ撮影位置であり、繰出し体２０に形成する操作ノブ５０を図３で矢印ｃ方向（時計方向）に回転することによって、カム受け２３は傾斜カム面２７に沿って移動し、第２の水平カム面２６と至り、それ以上回転しようとしてもカム受け２３は回り止め部２９に突き当たるから、カム受け２３が第２の水平カム面２６と係合した状態で保持される。これにより、傾斜カム面２７に相当する高さ分、レンズ４１が光軸方向に移動し、通常撮影位置で保持される。この状態で鏡胴４０に形成された焦点調整用雄ネジ４２を繰出し体２０に形成された焦点調整用雌ネジ３３と螺合して鏡胴４０に組み込まれたレンズ４１と撮影素子６０との焦点距離を微調整した後、接着剤などによって、鏡胴４０と繰出し体２０とを一体的に固定する。 In the present embodiment configured as described above, an assembly configuration of each component will be described. First, an image pickup device 60 made of a CCD or the like is held on the bottom of the holder 10 by an appropriate means, and a spring 35 is inserted into a counterbore 15 formed in a boss portion of the peripheral wall portion 11, and a pressing pin 36 is attached to the spring 35. Include. On the other hand, a focus adjusting male screw 42 formed on the lens barrel 40 is screwed into the focus adjusting female screw 33 of the feeding body 20 and incorporated in the lens barrel 40. Then, the cylindrical portion 21 of the feeding body 20 is fitted inside the peripheral wall portion 11 of the holder 10. At this time, the cam receiver 23 formed on the feeding body 20 is pushed down while being aligned with the groove portion 30 formed on the peripheral wall portion 11, and the cam receiver 23 is pushed down below one of the rotation stoppers 28 (see FIG. 2 is rotated in the direction of arrow b). As a result, the cam receiver 23 gets over the anti-rotation portion 28 and engages with the cam 24 (first horizontal cam 25). At this time, the spring 35 assembled to the boss portion 14 of the peripheral wall portion 11 is pressed and compressed by the flange portion 22, and the pressing pin 36 assembled to the spring 35 is fitted into the positioning recess 52 formed in the flange portion 22. In this state, the flange portion 22 is urged upward. Accordingly, the cam receiver 23 is always pressed against the first horizontal cam surface 25 of the cam 24, and the feeding body 20 is held by the holder 10. When the cam receiver 23 is engaged with the first horizontal cam surface 25, the macro shooting position is set, and the operation knob 50 formed on the feeding body 20 is rotated in the direction of arrow c (clockwise) in FIG. The cam receiver 23 moves along the inclined cam surface 27, reaches the second horizontal cam surface 26, and the cam receiver 23 abuts against the rotation preventing portion 29 even if the cam receiver 23 tries to rotate further. It is held in a state of being engaged with the horizontal cam surface 26. As a result, the lens 41 moves in the optical axis direction by the height corresponding to the inclined cam surface 27 and is held at the normal photographing position. In this state, the focus adjustment male screw 42 formed on the lens barrel 40 is screwed with the focus adjustment female screw 33 formed on the feeding body 20, and the lens 41 incorporated in the lens barrel 40 and the imaging element 60. After finely adjusting the focal length, the lens barrel 40 and the feeding body 20 are integrally fixed with an adhesive or the like.

この後、繰出し体２０に形成する操作ノブ５０を図３で矢印ｄ方向（反時計方向）に回転することによってホルダ１０の周壁部１１に沿って繰出し体２０の円筒部２１が案内され、繰出し体２０が回転し、これに伴って、前記カム受け２３が傾斜カム面２７を経由して第１の水平カム面２５に係合し、カム受け２３は回り止め部２８によって回り止めされ、マクロ撮影位置で保持される。このように操作ノブ５０を操作して繰出し体２０を回転することによって、カム受け２３を第１及び第２の水平カム面２５、２６に係合させて、通常撮影位置とマクロ撮影位置で保持することができる。また、カム受け２３と第１及び第２の水平カム面２５、２６との係合時において、繰出し体２０のフランジ部２２とホルダ１０との間に介在するバネ３５によって弾発的に付勢され、レンズ４１を通常撮影位置とマクロ撮影位置で保持する際、繰出し体２０がガタ付くことなく、ホルダ１０に対して確実に保持される。 Thereafter, the operation knob 50 formed on the feeding body 20 is rotated in the direction of arrow d (counterclockwise) in FIG. 3 to guide the cylindrical portion 21 of the feeding body 20 along the peripheral wall portion 11 of the holder 10. As the body 20 rotates, the cam receiver 23 engages with the first horizontal cam surface 25 via the inclined cam surface 27, and the cam receiver 23 is prevented from rotating by the rotation preventing portion 28. It is held at the shooting position. By operating the operation knob 50 and rotating the feeding body 20 in this way, the cam receiver 23 is engaged with the first and second horizontal cam surfaces 25 and 26 and held at the normal shooting position and the macro shooting position. can do. Further, when the cam receiver 23 is engaged with the first and second horizontal cam surfaces 25, 26, it is elastically biased by a spring 35 interposed between the flange portion 22 of the feeding body 20 and the holder 10. When the lens 41 is held at the normal shooting position and the macro shooting position, the feeding body 20 is securely held with respect to the holder 10 without rattling.

以上のように、操作ノブ５０を指で回転すれば、この操作ノブ５０と一体化した繰出し体２０に回転を伝え、繰出し体２０はホルダ１０の周壁部１１に沿って回転して繰出し体２０に装着される鏡筒４０は、通常撮影位置とマクロ撮影位置でカム受け２３と第１及び第２の水平カム面２５、２６が係合し、マクロ撮影位置と通常撮影位置で焦点が切り換わる。このように、第１及び第２の水平カム面２５、２６とカム受け２３との係合によってマクロ撮影位置と通常撮影位置での焦点の切り換えをスムーズに行えるとともに、カム受け２３と第１及び第２の水平カム面２５、２６との係合によって繰出し体２０に組み込んだ鏡筒４０を光軸方向に移動させることから、従来のように多条雌ネジの噛み合いよって通常撮影位置とマクロ撮影位置での焦点の切り換えを行う構造に比べ、カムの加工には高精度が要求されないから、成形加工も容易である。さらに、レンズ４１と撮像素子６０との間にリング状の弾性体を配置する必要がないため、リング状の弾性体によってレンズ４１の光路を遮る虞れもない。このため、従来のように、撮影素子６０とレンズ４１との間にレンズ４１の光路を遮る弾性体なども存在しないから、その弾性体をレンズ４１の光路を遮らないように大きく形成するといった制約もなく、小型撮像モジュールの小型化が可能である。さらに、バネ３５及び押圧ピン３６は、ホルダ１０の周壁部１１の外周に突設したボス部１４に組み込まれているため、通常撮影位置、マクロ撮影位置の切り換え操作に際し、繰出し体２０を回転させ場合、繰出し体２０の回転に伴って押圧ピン３６の接触部分において磨耗粉が発生する場合があるが、その磨耗粉が撮影素子６０とレンズ４１との間に入り込む心配はないため、磨耗粉によって光学的な悪影響を確実に防止することができる。 As described above, when the operation knob 50 is rotated with a finger, the rotation is transmitted to the feeding body 20 integrated with the operation knob 50, and the feeding body 20 rotates along the peripheral wall portion 11 of the holder 10 to feed the feeding body 20. The lens barrel 40 attached to the camera is engaged with the cam receiver 23 and the first and second horizontal cam surfaces 25 and 26 at the normal shooting position and the macro shooting position, and the focus is switched between the macro shooting position and the normal shooting position. . As described above, the engagement between the first and second horizontal cam surfaces 25 and 26 and the cam receiver 23 can smoothly switch the focus between the macro photographing position and the normal photographing position. Since the lens barrel 40 incorporated in the feeding body 20 is moved in the optical axis direction by engagement with the second horizontal cam surfaces 25 and 26, the normal shooting position and the macro shooting are performed by meshing the multi-thread female screw as in the conventional case. Compared to the structure that switches the focus at the position, high precision is not required for cam processing, and molding is easy. Furthermore, since it is not necessary to arrange a ring-shaped elastic body between the lens 41 and the image sensor 60, there is no possibility that the optical path of the lens 41 is blocked by the ring-shaped elastic body. For this reason, unlike the prior art, there is no elastic body that blocks the optical path of the lens 41 between the imaging element 60 and the lens 41, so that the elastic body is made large so as not to block the optical path of the lens 41. Therefore, it is possible to reduce the size of the small imaging module. Further, since the spring 35 and the pressing pin 36 are incorporated in the boss portion 14 projecting from the outer periphery of the peripheral wall portion 11 of the holder 10, the feeding body 20 is rotated during the switching operation between the normal photographing position and the macro photographing position. In this case, wear powder may be generated at the contact portion of the pressing pin 36 with the rotation of the feeding body 20, but there is no concern that the wear powder enters between the imaging element 60 and the lens 41. Optical adverse effects can be reliably prevented.

以上、本発明の実施例について詳述したが、本発明は、前記実施例に限定されるものではなく、本発明の要旨の範囲内で種々の変形実施が可能である。例えば、前記実施例では、カム２４を高さが異なる第１及び第２の水平カム面２５，２６と、これら第１及び第２の水平カム面２５，２６を連結する傾斜カム面２７とで構成した例を示したが、３段以上の水平カム面を設けることによって、通常撮影位置とマクロ撮影位置以外の任意の位置でレンズを保持することが可能であり、カムの形状やレンズの位置を切り換える水平カム面の数などは適宜選定すればよい。また、レンズを構成するレンズの枚数や形状あるいはホルダの形状や各構成部品の取付構造などは適宜選定すればよい。また、操作ノブ５０を設置せず、繰出し体２０に設けた切欠き部５１を使用して回転を与えてもよい。さらに、鏡筒４０の焦点調整用雌ネジ３３と焦点調整用雄ネジ４２を設置せず、ネジによる焦点調整用を行わない鏡筒４０を圧入または接着等により一体的に固定した構造、あるいは繰出し体２０に、鏡筒４０を設置せず直接レンズ４１を組み込んで一体構造化したものでもよい。また、フランジ部２２を上方側に押圧して前記カム受け２３をカム面２４に押し付ける付勢手段もバネに限らず、適宜選定すればよい。 As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above-described embodiment, the cam 24 includes the first and second horizontal cam surfaces 25 and 26 having different heights, and the inclined cam surface 27 that connects the first and second horizontal cam surfaces 25 and 26. In the example shown, it is possible to hold the lens at any position other than the normal shooting position and the macro shooting position by providing three or more horizontal cam surfaces. What is necessary is just to select suitably the number of the horizontal cam surfaces which switch. Further, the number and shape of the lenses constituting the lens, the shape of the holder, the mounting structure of each component, and the like may be appropriately selected. Further, the operation knob 50 may not be installed, and rotation may be given using the notch 51 provided in the feeding body 20. Further, the focus adjustment female screw 33 and the focus adjustment male screw 42 of the lens barrel 40 are not installed, and the lens barrel 40 that is not subjected to the focus adjustment by the screw is integrally fixed by press-fitting or bonding or the like. The body 20 may be integrated with the body 41 by directly incorporating the lens 41 without installing the lens barrel 40. The biasing means that presses the flange portion 22 upward and presses the cam receiver 23 against the cam surface 24 is not limited to a spring, and may be selected as appropriate.

本発明の一実施例を示す小型撮像モジュールの一部を切り欠いた分解斜視図である。It is the disassembled perspective view which notched a part of small imaging module which shows one Example of this invention. 同上、カム受けとカムとの係合状態を説明するためにホルダの外周を３６０°展開させた展開図である。FIG. 6 is a development view in which the outer periphery of the holder is developed 360 ° in order to explain the engagement state between the cam receiver and the cam. 同上、小型撮像モジュールの平面図である。It is a top view of a small imaging module same as the above. 同上、図３のＡ−Ａ線断面図である。FIG. 4 is a cross-sectional view taken along line AA in FIG.

Explanation of symbols

１０ホルダ
１１周壁部
１４ボス部
２０繰出し体
２１円筒部
２２フランジ部
２３カム受け
２４カム
２５第１の水平カム面
２６第２の水平カム面
２７傾斜カム面
３３焦点調整用雌ネジ
３５バネ（付勢手段）
３６押圧ピン
４１レンズ
４２焦点調整用雄ネジ
４０鏡筒
５０操作ノブ
６０撮像素子
DESCRIPTION OF SYMBOLS 10 Holder 11 Perimeter wall part 14 Boss part 20 Feeding body 21 Cylindrical part 22 Flange part 23 Cam receiver 24 Cam 25 1st horizontal cam surface 26 2nd horizontal cam surface 27 Inclined cam surface 33 Focus adjustment internal thread 35 Spring (with) Means)
36 pressing pin 41 lens 42 male screw for focus adjustment 40 lens barrel 50 operation knob 60 image sensor

Claims

A holder having a cylindrical peripheral wall portion, a cylindrical wall incorporated inside the peripheral wall portion, and a feeding body incorporating a lens barrel incorporating a lens inside the cylindrical wall, and fixed integrally to the feeding body An operating knob, a cam formed on the peripheral wall, and a cam receiver formed on the feeding body corresponding to the cam, and the feeding ring is rotated by a predetermined angle by the operating knob. A macro photographing lens having a switching function, wherein the lens is moved in an optical axis direction by engagement with a cam receiver to switch a focal length of the lens.

The cam is formed on the outer periphery of the peripheral wall portion, and includes a plurality of cam surfaces that are continuous in steps, while the cam receiver is suspended from a flange portion that is integrally formed with an upper end edge of the cylindrical wall. 2. The switching according to claim 1, wherein the holder is provided with a biasing means for pressing the cam receiver against the cam surface by pressing the flange portion upward. Macro shooting lens with functions.

The biasing means includes a spring and a pressing pin biased by the spring, and a boss portion to which the spring and the pressing pin are attached is integrally formed on the outer side of the peripheral wall portion of the holder. Item 5. A macro photographing lens having the switching function according to Item 2.