JP3407593B2 - Lens drive mechanism - Google Patents
Lens drive mechanismInfo
- Publication number
- JP3407593B2 JP3407593B2 JP09259797A JP9259797A JP3407593B2 JP 3407593 B2 JP3407593 B2 JP 3407593B2 JP 09259797 A JP09259797 A JP 09259797A JP 9259797 A JP9259797 A JP 9259797A JP 3407593 B2 JP3407593 B2 JP 3407593B2
- Authority
- JP
- Japan
- Prior art keywords
- base plate
- drive
- lens
- groove
- feed plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Lens Barrels (AREA)
- Structure And Mechanism Of Cameras (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、撮影レンズを保持
するレンズユニットを台板に対して繰り出し、又は収納
するためのレンズ駆動機構に係り、特に、小型化、薄型
化を図る技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens driving mechanism for extending or accommodating a lens unit for holding a taking lens with respect to a base plate, and more particularly to a technique for achieving miniaturization and thinning.
【０００２】[0002]
【従来の技術】従来、カメラにおいて、非撮影時（非使
用時）に撮影レンズを保持する移動鏡筒を固定鏡筒内に
沈胴させ、撮影時に移動鏡筒を固定鏡筒外へ繰り出させ
るために、一般にＤＣモータとギア等から成る駆動機構
が用いられている。2. Description of the Related Art Conventionally, in a camera, a movable lens barrel for holding a photographing lens is retracted into a fixed lens barrel when not photographing (when not in use), and is extended out of the fixed lens barrel during photographing. In general, a drive mechanism including a DC motor and gears is generally used.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
ような従来のＤＣモータとギア等から成る駆動機構は構
成が複雑であり、これらの収納のための大きなスペース
が必要となるため、カメラの小型化に不利であるといっ
た問題があった。However, the conventional drive mechanism composed of the DC motor and the gears as described above has a complicated structure and requires a large space for accommodating them, so that the size of the camera can be reduced. There was a problem that it was unfavorable to conversion.
【０００４】本発明は、上述した問題点を解決するため
になされたものであり、レンズの駆動に軸の倒立を利用
することにより、ＤＣモータやギア等からなる複雑な駆
動機構が不要となり、その分、省スペースとなり、小型
化、薄型化を図ることができるレンズ駆動機構を提供す
ることを目的とする。The present invention has been made to solve the above-mentioned problems, and by utilizing the inverted shaft to drive the lens, a complicated drive mechanism including a DC motor and gears becomes unnecessary, Therefore, it is an object of the present invention to provide a lens driving mechanism that saves space and can be made smaller and thinner.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に請求項１に記載の発明に係るレンズ駆動機構は、撮影
レンズを保持する支持部材と、この支持部材を支持する
台板とを有し、支持部材を台板に対して繰り出し、又は
収納するレンズ駆動機構において、支持部材と台板とを
連結する棒状の連結部材と、連結部材が係合され連結部
材を摺動させる溝を有し、台板に対して回転自在に設け
られた駆動部材と、駆動部材を回転駆動させる駆動源と
を備え、駆動源を駆動して駆動部材を回転させることに
より、駆動部材の溝に係合されている連結部材が倒立し
て支持部材を駆動するものである。In order to achieve the above object, a lens driving mechanism according to a first aspect of the present invention comprises a support member for holding a taking lens and a base plate for supporting the support member. In the lens driving mechanism that extends or stores the support member with respect to the base plate, a rod-shaped connection member that connects the support member and the base plate and a groove that is engaged with the connection member and slides the connection member are provided. The drive member is provided rotatably with respect to the base plate, and the drive source for rotationally driving the drive member is provided. By driving the drive source to rotate the drive member, the drive member is engaged with the groove of the drive member. The connected member is inverted to drive the support member.
【０００６】上記構成においては、駆動源を駆動する
と、駆動部材は回転駆動され、この駆動部材の溝に摺動
係合されている棒状の連結部材が倒立する。この動作に
より、支持部材は台板に対して繰り出される。繰り出し
状態から駆動源の逆方向駆動により、駆動部材が逆回転
に回転駆動され連結部材が立ち下げられ、これにより支
持部材は台板に収納される。このように、連結部材の倒
立を用いて撮影レンズを保持する支持部材を駆動するこ
とができ、ギア等の複雑な駆動機構が不要となる。In the above structure, when the drive source is driven, the drive member is rotationally driven, and the rod-shaped connecting member slidably engaged with the groove of the drive member is inverted. By this operation, the support member is extended with respect to the base plate. By driving the drive source in the reverse direction from the extended state, the drive member is rotationally driven in the reverse rotation and the connecting member is lowered, whereby the support member is stored in the base plate. In this way, the support member that holds the photographing lens can be driven by using the inverted connection member, and a complicated drive mechanism such as a gear is unnecessary.
【０００７】また、請求項２の発明は、上記請求項１に
記載のレンズ駆動機構であって、駆動源は、超音波モー
タから成るものである。この構成においては、超音波モ
ータは、ＤＣモータに比べて容易に小型化を図ることが
できる。According to a second aspect of the present invention, in the lens driving mechanism according to the first aspect, the driving source is an ultrasonic motor. In this configuration, the ultrasonic motor can be easily downsized as compared with the DC motor.
【０００８】また、請求項３に記載の発明に係るレンズ
駆動機構は、撮影レンズを保持する支持部材と、この支
持部材を支持する台板とを有し、支持部材を台板に対し
て繰り出し、又は収納するレンズ駆動機構において、支
持部材と台板の間に配置され、台板に対して移動自在に
設けられた送り板と、送り板に設けられた溝と略同等の
長さを持ち、溝と平行に配置され、通電制御により極性
反転が可能な電磁石と、支持部材と送り板を連結し、そ
の両端において異なる極性に着磁され、両端連結部が電
磁石に対抗する状態を有し、送り板と連結される連結部
が送り板の溝内において滑動自在に構成されている第１
の連結部材と、送り板と台板を連結し、送り板と連結す
る連結部が第１連結部材の連結部と連動するように構成
されている第２の連結部材とを備え、電磁石を通電制御
し、この電磁石と第１の連結部材との間に作用する磁力
により、第１の連結部材の送り板との連結部を溝内で滑
動させることにより、第１の及び第２の連結部材が倒立
して支持部材を駆動するものである。The lens driving mechanism according to the invention of claim 3 has a supporting member for holding the taking lens and a base plate for supporting the supporting member, and the supporting member is extended to the base plate. Alternatively, in the lens driving mechanism to be housed, the feed plate, which is arranged between the support member and the base plate and is movable with respect to the base plate, has a length substantially equal to the groove provided in the feed plate, An electromagnet, which is arranged in parallel with the electromagnet and whose polarity can be reversed by controlling energization, connects the support member and the feed plate, is magnetized with different polarities at both ends, and has a state in which both end connection parts oppose the electromagnet, A first connecting part connected to the plate is configured to be slidable in the groove of the feed plate.
And a second connecting member configured to connect the feed plate and the base plate and to connect the feed plate to the connecting portion of the first connecting member, and energize the electromagnet. The magnetic force acting between the electromagnet and the first connecting member is controlled, and the connecting portion of the first connecting member with the feed plate is slid in the groove. Is to invert and drive the support member.
【０００９】この構成においては、電磁石に通電し、こ
の電磁石の極性と第１の連結部材の磁極との間に反発力
を作用させると、第１の連結部材の送り板との連結部は
送り板の溝内を滑動し、これにより、第１及び第２の連
結部材が倒立し、それに伴い支持部材は台板に対して繰
り出される。繰り出し状態から電磁石を上記とは逆方向
に駆動すると、第１の連結部材の送り板との連結部が送
り板の溝内を上記とは逆方向に滑動し、これにより第１
及び第２の連結部材が立ち下げられ、支持部材は台板に
収納される。このように、レンズを保持する支持部材の
駆動に連結部材の倒立を用いているので、上記請求項１
と同様の作用が得られる。In this structure, when the electromagnet is energized and a repulsive force is applied between the polarity of the electromagnet and the magnetic pole of the first connecting member, the connecting portion of the first connecting member with the feed plate is fed. It slides in the groove of the plate, whereby the first and second connecting members are inverted, and the supporting member is paid out with respect to the base plate accordingly. When the electromagnet is driven in the opposite direction from the extended state, the connecting portion of the first connecting member with the feed plate slides in the groove of the feed plate in the opposite direction to the above, whereby the first
The second connecting member is lowered and the supporting member is housed in the base plate. As described above, the inversion of the connecting member is used to drive the supporting member that holds the lens.
The same effect as can be obtained.
【００１０】[0010]
【発明の実施の形態】以下、本発明を具体化した一実施
形態を図面を参照して説明する。図１乃至図４は第１の
実施形態によるレンズ駆動機構を示す。図１は同レンズ
駆動機構の外観図、図２はこの駆動機構の分解斜視図、
図３（ａ）（ｂ）はそれぞれ駆動機構の収納状態及び繰
り出し状態における断面図、図４は超音波モータによる
駆動部材の回転動作を説明するための上面図である。こ
れらの図において、レンズ駆動機構１は、小型のカメラ
等に用いられるものであり、被写体像を結像する撮影レ
ンズ２ａ（図３）を保持するレンズユニット２（保持部
材）、このレンズユニット２を支持するリング状の台板
３、この台板３に対して回転自在に設けられたリング状
の送り板４（駆動部材）、レンズユニット２と台板３と
を連結する３本の駆動軸５（連結部材）、及び台板３に
設けられた超音波モータ７（駆動源）とから構成され、
レンズユニット２を台板３に対して繰り出し又は収納す
るためのものである。超音波モータ７は台板３の外周に
位置するステータ部と送り板４でなるロータ部とから構
成される。台板３には３つの溝６ａが設けられており、
これら溝６ａには駆動軸５の一端が挿入され、この一端
は溝６ａ内の端部６ｂの近傍に回転自在に軸支されてい
る。駆動軸５は溝６ａと同等の曲率を持っている。ま
た、超音波モータ７は、ロータとなる送り板４を回転さ
せるためのものであり、どちらの方向にも送り板４を回
転させることができるように、不図示の制御回路に接続
されている。また、送り板４には３つの開口４ａが設け
られ、これら開口４ａには駆動軸５が挿通されている。
さらに、この駆動軸５の他端がレンズユニット２に回転
自在に軸支されている。なお、前記駆動軸５の送り板４
との挿通部分は、ユニバーサルジョイント又はホールジ
ョイントにより結合されていることが望ましい。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show a lens driving mechanism according to the first embodiment. 1 is an external view of the lens drive mechanism, FIG. 2 is an exploded perspective view of the drive mechanism,
3A and 3B are cross-sectional views of the drive mechanism in the housed state and the extended state, and FIG. 4 is a top view for explaining the rotating operation of the drive member by the ultrasonic motor. In these figures, a lens driving mechanism 1 is used for a small camera or the like, and a lens unit 2 (holding member) that holds a taking lens 2a (FIG. 3) that forms a subject image, this lens unit 2 A ring-shaped base plate 3 for supporting the base plate 3, a ring-shaped feed plate 4 (driving member) rotatably provided on the base plate 3, and three drive shafts connecting the lens unit 2 and the base plate 3 5 (connecting member) and an ultrasonic motor 7 (driving source) provided on the base plate 3,
The lens unit 2 is to be extended or stored with respect to the base plate 3. The ultrasonic motor 7 is composed of a stator portion located on the outer periphery of the base plate 3 and a rotor portion composed of the feed plate 4. The base plate 3 is provided with three grooves 6a,
One end of the drive shaft 5 is inserted into these grooves 6a, and this one end is rotatably supported near the end 6b in the groove 6a. The drive shaft 5 has the same curvature as the groove 6a. The ultrasonic motor 7 is for rotating the feed plate 4 serving as a rotor, and is connected to a control circuit (not shown) so that the feed plate 4 can be rotated in either direction. . Further, the feed plate 4 is provided with three openings 4a, and the drive shaft 5 is inserted through these openings 4a.
Further, the other end of the drive shaft 5 is rotatably supported by the lens unit 2. The feed plate 4 of the drive shaft 5
It is desirable that the insertion portions for and are connected by a universal joint or a hole joint.
【００１１】上記超音波モータ７は、櫛歯状弾性体圧電
セラミックスを備えたステータ部と、摩擦リングを備え
たロータ部（ここでは、送り板４）とからなり、その動
作原理は、ステータ部の圧電セラミックスに高周波電圧
をかけて、圧電セラミックスを振動させ、この振動力か
らロータ部の摩擦リングを介して一定方向の駆動力つま
り回転力を得るものである。この超音波モータ７を用い
れば、ＤＣモータよりも小型化が容易であり、また、低
速回転で大きな力を得ることができる。The ultrasonic motor 7 is composed of a stator portion provided with a comb-shaped elastic body piezoelectric ceramics and a rotor portion (here, the feed plate 4) provided with a friction ring, and its operating principle is the stator portion. A high frequency voltage is applied to the piezoelectric ceramic to vibrate the piezoelectric ceramic, and a driving force in a certain direction, that is, a rotational force is obtained from the vibration force via the friction ring of the rotor portion. If this ultrasonic motor 7 is used, downsizing is easier than a DC motor, and a large force can be obtained at low speed rotation.
【００１２】次に、この超音波モータ７を利用したレン
ズ駆動機構１によるレンズ駆動方法について説明する。
図３（ａ）（ｂ）は台板３の手前側リング部分を断面し
て示しており、図３（ａ）の収納状態では、駆動軸５は
横倒されて、レンズユニット２は台板３に収納されてい
る。いま、超音波モータ７を駆動させ、送り板４を手前
側で図示の左方向（上面視では時計回り方向）に回転さ
せると、開口４ａの右壁部４ｂが駆動軸５に当接して、
駆動軸５を倒立していく。これにより、図３（ｂ）に示
すように、駆動軸５がレンズ２ａの光軸方向に立上がる
と、繰り出しが完了する。Next, a lens driving method by the lens driving mechanism 1 using the ultrasonic motor 7 will be described.
3 (a) and 3 (b) are sectional views of the front side ring portion of the base plate 3, and in the stored state of FIG. 3 (a), the drive shaft 5 is laid sideways and the lens unit 2 is mounted on the base plate. It is stored in 3. Now, when the ultrasonic motor 7 is driven to rotate the feed plate 4 in the leftward direction (clockwise in top view) on the front side, the right wall portion 4b of the opening 4a comes into contact with the drive shaft 5,
Invert the drive shaft 5. As a result, as shown in FIG. 3B, when the drive shaft 5 rises in the optical axis direction of the lens 2a, the feeding is completed.
【００１３】また、レンズユニット２を繰り出した状態
から収納状態にするには、超音波モータ７の通電方向を
変えて、送り部材４を上記とは逆方向に回転させればよ
い。これにより、開口４ａの左壁部４ｃがレンズ駆動軸
５を立ち下げるので、レンズユニット２は台板３に収納
される。Further, in order to bring the lens unit 2 into the housed state from the extended state, the feeding direction of the ultrasonic motor 7 may be changed and the feeding member 4 may be rotated in the opposite direction. As a result, the left wall portion 4c of the opening 4a lowers the lens drive shaft 5, so that the lens unit 2 is housed in the base plate 3.
【００１４】上記のように、レンズユニット２の駆動に
駆動軸５の倒立を用いたので、ギア等の複雑な駆動機構
が不要となり、省スペースな構成とすることができ、レ
ンズ駆動機構の小型化、薄型化を図ることができる。ま
た、このレンズ駆動機構１を備えたカメラの小型化を図
ることができる。また、構成が単純なために部品数が大
幅に減り、低コスト化を図ることができる。さらに、Ｄ
Ｃモータではなく超音波モータ７を駆動源として用いた
ことにより、レンズ駆動機構１の小型化をより一層進め
ることができる。As described above, since the inversion of the drive shaft 5 is used to drive the lens unit 2, a complicated drive mechanism such as a gear is not required and a space-saving structure can be realized, and the lens drive mechanism is small in size. And can be made thinner. Further, it is possible to reduce the size of the camera including the lens driving mechanism 1. Further, since the structure is simple, the number of parts is significantly reduced, and the cost can be reduced. Furthermore, D
By using the ultrasonic motor 7 as the drive source instead of the C motor, the lens drive mechanism 1 can be further downsized.
【００１５】図５及び図６は、第２の実施形態によるレ
ンズ駆動機構を示す。図５はレンズ駆動機構の外観図、
図６はこのレンズ駆動機構の側面図である。これらの図
において、レンズ駆動機構２１は、撮影レンズ２２ａ
（図６）を保持するレンズユニット２２（保持部材）、
このレンズユニット２２を支持する台板２３、レンズユ
ニット２２と台板２３との間に配置される送り板２４、
レンズユニット２２と送り板２４間を連結する第１の連
結部材２５、及び台板２３と送り板２４間とを連結する
第２の連結部材２６とを有し、レンズユニット２２を台
板２３に対して繰り出し又は収納させるためのものであ
る。5 and 6 show a lens driving mechanism according to the second embodiment. 5 is an external view of the lens drive mechanism,
FIG. 6 is a side view of this lens driving mechanism. In these figures, the lens driving mechanism 21 includes a photographing lens 22a.
A lens unit 22 (holding member) for holding (FIG. 6),
A base plate 23 for supporting the lens unit 22, a feed plate 24 arranged between the lens unit 22 and the base plate 23,
The lens unit 22 and the feed plate 24 are connected by a first connection member 25 and a base plate 23 and the feed plate 24 are connected by a second connection member 26. It is for feeding or storing it.
【００１６】台板２３は四角形状をなし、４つの側壁の
それぞれに第２の連結部材２６の一側端が回転自在に軸
支され、また、この第２の連結部材２６の他側端が送り
板２４の溝２７に滑動自在に支持される。送り板２４は
四角形状をなし、４つの側壁のそれぞれに溝２７が設け
られ、これら溝２７の近傍には、溝２７と略同等の長さ
の電磁石２８が、溝２７と平行に配置されている。これ
ら電磁石２８は、通電制御により極性が反転するもので
あり、不図示の制御回路により制御されている。第１の
連結部材２５の送り板２４と連結する連結部３０は、前
記第２の連結部材２６の他側端と同軸とされ、送り板２
４の溝２７内で滑動自在に支持され、Ｎ極性に着磁され
ている。この第１の連結部材２５のレンズユニット２２
に軸支された連結部３１は、前記連結部３０と異なる極
性、即ちＳ極性に着磁されている。また、第１及び第２
の連結部材２５，２６が倒立していない状態では、第１
の連結部材２５両端の連結部３０，３１の磁極は、電磁
石２７の両端側に対向し合う状態にある。なお、台板２
３に対して送り板２４及びレンズユニット２２は、それ
らの並び方向に移動自在であるが、回転はしないよう
に、不図示の軸にガイドされている。The base plate 23 has a quadrangular shape, and one side end of the second connecting member 26 is rotatably supported by each of the four side walls, and the other side end of the second connecting member 26 is rotatably supported. It is slidably supported in the groove 27 of the feed plate 24. The feed plate 24 has a quadrangular shape and is provided with grooves 27 on each of the four side walls. An electromagnet 28 having a length substantially equal to that of the groove 27 is arranged in parallel with the groove 27 in the vicinity of these grooves 27. There is. These electromagnets 28 are those whose polarities are inverted by controlling energization, and are controlled by a control circuit (not shown). The connecting portion 30 of the first connecting member 25, which is connected to the feed plate 24, is coaxial with the other end of the second connecting member 26.
It is slidably supported in the groove 27 of No. 4 and is magnetized to have N polarity. The lens unit 22 of the first connecting member 25
The connecting portion 31 pivotally supported by is magnetized to have a polarity different from that of the connecting portion 30, that is, an S polarity. Also, the first and second
When the connecting members 25 and 26 of the
The magnetic poles of the connecting portions 30 and 31 on both ends of the connecting member 25 are in a state of facing each other on both ends of the electromagnet 27. The base plate 2
3, the feed plate 24 and the lens unit 22 are movable in their arranging direction, but are guided by a shaft (not shown) so as not to rotate.
【００１７】次に、このレンズ駆動機構２１によるレン
ズ駆動方法について、図６を参照して説明する。収納状
態では、連結部３０は送り板２４の各側壁における溝２
７の左端部に位置され、連結部材２５，２６は横倒され
て、レンズユニット２２は台板２３に収納されている。
ここで、電磁石２８の右端２８ａがＳ極性に、左端２８
ｂがＮ極性に成るように通電すると、連結部３０と電磁
石２８の左端２８ｂとは同極であるので反発力が生じ
る。これにより、連結部３０は溝２７内で右方向に移動
し、第１及び第２の連結部材２５，２６は倒立され、レ
ンズユニット２２は台板２３より繰り出される。また、
連結部３１と電磁石２８の右端２８ａとは同極であるの
で、この反発力によっても、第１の連結部材２５は立ち
上げられる。Next, a lens driving method by the lens driving mechanism 21 will be described with reference to FIG. In the housed state, the connecting portion 30 serves as the groove 2 on each side wall of the feed plate 24.
The lens unit 22 is housed in the base plate 23, which is located at the left end portion of the lens 7, the connecting members 25 and 26 are laid down sideways.
Here, the right end 28a of the electromagnet 28 has an S polarity and the left end 28a
When electricity is applied so that b has the N polarity, a repulsive force is generated because the connecting portion 30 and the left end 28b of the electromagnet 28 have the same polarity. As a result, the connecting portion 30 moves to the right in the groove 27, the first and second connecting members 25 and 26 are inverted, and the lens unit 22 is extended from the base plate 23. Also,
Since the connecting portion 31 and the right end 28a of the electromagnet 28 have the same polarity, the repulsive force also causes the first connecting member 25 to rise.
【００１８】また、レンズユニット２２を繰り出した状
態から収納状態にするには、電磁石２８に上記とは逆の
極性の電流を流し、電磁石２８の右端２８ａをＮ極性
に、左端２８ｂをＳ極性にすればよい。これにより、連
結部３０と電磁石２８の右端２８ａ間に反発力が生じ、
また、連結部３１と電磁石２８の右端２８ａ間に吸引力
が生じるので、連結部３０が溝２７内で左方向に移動
し、連結部材２５，２６は立ち下がり、レンズユニット
２２は台板２３に収納される。To move the lens unit 22 from the extended state to the retracted state, a current having a polarity opposite to the above is applied to the electromagnet 28 so that the right end 28a of the electromagnet 28 has the N polarity and the left end 28b has the S polarity. do it. Thereby, a repulsive force is generated between the connecting portion 30 and the right end 28a of the electromagnet 28,
Further, since an attractive force is generated between the connecting portion 31 and the right end 28a of the electromagnet 28, the connecting portion 30 moves leftward in the groove 27, the connecting members 25 and 26 fall, and the lens unit 22 is attached to the base plate 23. It is stored.
【００１９】上記のように、連結部材２５，２６を移動
させるための駆動力にこれらの着磁極と電磁石２８を用
いており、電動モータとギア等から成る駆動機構を用い
ていないので、これらの収納のためのスペースが不要と
なり、その分、体積を小さくでき、このレンズ駆動機構
１を備えたカメラの小型化、薄型化を図ることができ
る。また、減速ギア等が不要であるので、静音性に優れ
ている。As described above, these magnetized magnetic poles and the electromagnet 28 are used for the driving force for moving the connecting members 25 and 26, and the driving mechanism including the electric motor and the gear is not used. A space for storage is not required, and the volume can be reduced accordingly, and the camera including the lens driving mechanism 1 can be downsized and thinned. Further, since no reduction gear is required, it is excellent in quietness.
【００２０】なお、本発明は、上記実施形態に限られる
ことなく、種々の変形が可能である。例えば、上記第１
の実施形態では、送り板４に溝４ａを設け、この溝４ａ
が駆動軸５を倒立させるものを示したが、溝に代えて駆
動軸５が係合する段部を設け、この係合段部により駆動
軸５を倒立させるものであっても、上述と同様の効果を
得ることができる。また、上記第２の実施形態において
は、電磁石に通電した時に漏れ磁界が生じるので、カメ
ラが磁気フィルムを用いている場合など特に漏れ磁界に
対するシールド対策を施すことが望ましい。The present invention is not limited to the above embodiment, and various modifications can be made. For example, the first
In this embodiment, the feed plate 4 is provided with a groove 4a, and the groove 4a
Shows the one in which the drive shaft 5 is inverted, but a stepped portion with which the drive shaft 5 is engaged may be provided instead of the groove, and the drive shaft 5 may be inverted by the engagement stepped portion as in the above. The effect of can be obtained. Further, in the second embodiment, a leakage magnetic field is generated when the electromagnet is energized. Therefore, it is desirable to take a shielding measure against the leakage magnetic field especially when the camera uses a magnetic film.
【００２１】[0021]
【発明の効果】以上のように請求項１の記載の発明に係
るレンズ駆動機構によれば、レンズの駆動に軸の倒立を
用いているので、ギア等の複雑な駆動機構が不要とな
り、省スペース化が可能でレンズ駆動機構の小型化、薄
型化を図り、このレンズ駆動機構を用いたカメラの小型
化を図ることができる。また、構成が単純なため部品点
数が減り、コスト削減を図ることができる。As described above, according to the lens driving mechanism of the first aspect of the present invention, since the shaft is inverted to drive the lens, a complicated driving mechanism such as a gear is not required, and the lens is saved. It is possible to save space, downsize and thin the lens drive mechanism, and downsize the camera using this lens drive mechanism. Further, since the structure is simple, the number of parts can be reduced, and the cost can be reduced.
【００２２】また、請求項２に記載の発明に係るレンズ
駆動機構によれば、上記効果に加えて、超音波モータを
用いることにより、駆動機構の小型化等をより一層図る
ことができる。According to the lens drive mechanism of the second aspect of the present invention, in addition to the above effects, the use of the ultrasonic motor can further reduce the size of the drive mechanism.
【００２３】また、請求項３に記載の発明に係るレンズ
駆動機構によれば、レンズの駆動に連結部材の倒立を用
い、この連結部材の倒立のための駆動力として、連結部
の着磁極と電磁石間に作用する磁力を用いているので、
電動モータとギア等から成る複雑な駆動機構が不要とな
り、省スペース化が可能でレンズ駆動機構の小型化、薄
型化を図り、このレンズ駆動機構を用いたカメラの小型
化を図ることができる。According to the lens driving mechanism of the third aspect of the present invention, the inversion of the connecting member is used to drive the lens, and the driving force for the inversion of the connecting member is the magnetic pole of the connecting portion. Since the magnetic force acting between the electromagnets is used,
A complicated drive mechanism including an electric motor and gears is not necessary, space can be saved, the lens drive mechanism can be made smaller and thinner, and a camera using this lens drive mechanism can be made smaller.
【図１】本発明の第１の実施形態によるレンズ駆動機構
の外観図である。FIG. 1 is an external view of a lens driving mechanism according to a first embodiment of the present invention.
【図２】レンズ駆動機構の分解斜視図である。FIG. 2 is an exploded perspective view of a lens driving mechanism.
【図３】（ａ）（ｂ）は、それぞれレンズ駆動機構のレ
ンズユニットの収納状態及び繰り出し状態での断面図で
ある。3A and 3B are cross-sectional views of a lens unit of a lens driving mechanism in a housed state and a extended state, respectively.
【図４】超音波モータによる送り板の回転動作を説明す
るための上面図である。FIG. 4 is a top view for explaining the rotating operation of the feed plate by the ultrasonic motor.
【図５】第２の実施形態によるレンズ駆動機構の外観図
である。FIG. 5 is an external view of a lens driving mechanism according to a second embodiment.
【図６】このレンズ駆動機構の立ち上り途中の状態を示
す側面図である。FIG. 6 is a side view showing a state where the lens driving mechanism is in the process of rising.
１，２１ レンズ駆動機構 ２，２２ レンズユニット（支持部材） ２ａ，２２ａ 撮影レンズ ３，２３ 台板 ４ 送り板（駆動部材） ５ 駆動軸（連結部材） ６ａ 溝 ７ 超音波モータ（駆動源） ２４ 送り板 ２５ 第１の連結部材 ２６ 第２の連結部材 ２７ 溝 ２８ 電磁石 ３０ 連結部 1,21 Lens drive mechanism 2,22 Lens unit (support member) 2a, 22a Photographic lens 3,23 Bed plate 4 Feed plate (driving member) 5 Drive shaft (connecting member) 6a groove 7 Ultrasonic motor (drive source) 24 feeding plate 25 First Connection Member 26 Second Connection Member 27 grooves 28 Electromagnet 30 connection
───────────────────────────────────────────────────── フロントページの続き (72)発明者 廣井 和之 大阪市中央区安土町二丁目３番13号 大 阪国際ビルミノルタ株式会社内 (56)参考文献 特開 昭56−135828（ＪＰ，Ａ) 特開 平７−72366（ＪＰ，Ａ) 特開 平８−11081（ＪＰ，Ａ) 特開 昭57−120760（ＪＰ，Ａ) 特開 昭59−198409（ＪＰ，Ａ) 特開 平10−86724（ＪＰ，Ａ) 特開 昭61−208018（ＪＰ，Ａ) 実開 平４−126235（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02B 7/02 - 7/16 G03B 17/04 F16H 19/00 - 37/16 F16H 49/00 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuyuki Hiroi 2-3-13 Azuchi-cho, Chuo-ku, Osaka, Osaka, Osaka International Building Minolta Co., Ltd. (56) Reference JP-A-56-135828 (JP, A) ) JP-A-7-72366 (JP, A) JP-A-8-11081 (JP, A) JP-A-57-120760 (JP, A) JP-A-59-198409 (JP, A) JP-A-10- 86724 (JP, A) JP-A-61-208018 (JP, A) Actual development 4-126235 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) G02B 7/02-7 / 16 G03B 17/04 F16H 19/00-37/16 F16H 49/00
Claims (3)
支持部材を支持する台板とを有し、前記支持部材を前記
台板に対して繰り出し、又は収納するレンズ駆動機構に
おいて、 前記支持部材と前記台板とを連結する棒状の連結部材
と、 前記連結部材が係合され該連結部材を摺動させる溝を有
し、前記台板に対して回転自在に設けられた駆動部材
と、 前記駆動部材を回転駆動させる駆動源とを備え、 前記駆動源を駆動して前記駆動部材を回転させることに
より、該駆動部材の溝に係合されている前記連結部材が
倒立して前記支持部材を駆動することを特徴とするレン
ズ駆動機構。1. A lens driving mechanism comprising: a supporting member for holding a taking lens; and a base plate for supporting the supporting member, wherein the supporting member is extended or stored with respect to the base plate. A rod-shaped connecting member that connects the base plate and the base plate, a drive member that has a groove that engages the connecting member and slides the connecting member, and is rotatably provided with respect to the base plate, A drive source that rotationally drives the drive member, and by driving the drive source to rotate the drive member, the connecting member engaged in the groove of the drive member is inverted and the support member is A lens driving mechanism characterized by being driven.
のであることを特徴とする請求項１に記載のレンズ駆動
機構。2. The lens drive mechanism according to claim 1, wherein the drive source is an ultrasonic motor.
支持部材を支持する台板とを有し、前記支持部材を前記
台板に対して繰り出し、又は収納するレンズ駆動機構に
おいて、 前記支持部材と前記台板の間に配置され、該台板に対し
て移動自在に設けられた送り板と、 前記送り板に設けられた溝と略同等の長さを持ち、該溝
と平行に配置され、通電制御により極性反転が可能な電
磁石と、 前記支持部材と前記送り板を連結し、その両端において
異なる極性に着磁され、両端連結部が前記電磁石に対向
する状態を有し、前記送り板と連結される連結部が該送
り板の溝内において滑動自在に構成されている第１の連
結部材と、 前記送り板と前記台板を連結し、該送り板と連結する連
結部が前記第１連結部材の連結部と連動するように構成
されている第２の連結部材とを備え、 前記電磁石を通電制御し、この電磁石と前記第１の連結
部材との間に作用する磁力により、前記第１の連結部材
の送り板との連結部を前記溝内で滑動させることによ
り、前記第１の及び第２の連結部材が倒立して前記支持
部材を駆動することを特徴とするレンズ駆動機構。3. A lens driving mechanism comprising: a supporting member for holding a taking lens; and a base plate for supporting the supporting member, wherein the supporting member is extended or stored with respect to the base plate. And a feed plate disposed between the base plate and the base plate so as to be movable with respect to the base plate, and having a length substantially equal to the groove formed in the feed plate, arranged in parallel with the groove, and energized. An electromagnet whose polarity can be reversed by control, the support member and the feed plate are connected to each other, and both ends thereof are magnetized to have different polarities, and both end connection parts face the electromagnet and are connected to the feed plate. A first connecting member having a connecting portion configured to be slidable in a groove of the feed plate, and a connecting portion that connects the feed plate and the base plate and is connected to the feed plate is the first connection. Is configured to work with the connecting part of the member And a second connecting member for controlling the energization of the electromagnet, and the magnetic force acting between the electromagnet and the first connecting member causes the connecting portion of the first connecting member to connect to the feed plate. A lens driving mechanism, wherein the first and second connecting members are inverted to drive the supporting member by sliding in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09259797A JP3407593B2 (en) | 1997-04-10 | 1997-04-10 | Lens drive mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09259797A JP3407593B2 (en) | 1997-04-10 | 1997-04-10 | Lens drive mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10282397A JPH10282397A (en) | 1998-10-23 |
| JP3407593B2 true JP3407593B2 (en) | 2003-05-19 |
Family
ID=14058869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09259797A Expired - Fee Related JP3407593B2 (en) | 1997-04-10 | 1997-04-10 | Lens drive mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3407593B2 (en) |
-
1997
- 1997-04-10 JP JP09259797A patent/JP3407593B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10282397A (en) | 1998-10-23 |
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