JPH09258087A - Moving mechanism and optical equipment - Google Patents
Moving mechanism and optical equipmentInfo
- Publication number
- JPH09258087A JPH09258087A JP9599096A JP9599096A JPH09258087A JP H09258087 A JPH09258087 A JP H09258087A JP 9599096 A JP9599096 A JP 9599096A JP 9599096 A JP9599096 A JP 9599096A JP H09258087 A JPH09258087 A JP H09258087A
- Authority
- JP
- Japan
- Prior art keywords
- feed
- feed screw
- rack
- screw
- teeth
- 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.)
- Pending
Links
Landscapes
- Lens Barrels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は回転する送りネジ
とそれにかみ合うラックによって構成された移動機構お
よび該移動機構を備えた光学機器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving mechanism composed of a rotating feed screw and a rack which meshes with the screw, and an optical apparatus equipped with the moving mechanism.
【０００２】[0002]
【従来の技術】従来、この種の移動機構は図５に示すよ
うに構成されている。図において、１はステッピングモ
ーター等のアクチュエーター、２はアクチュエーター１
によって回転駆動される送りネジ、３は送りネジ２と噛
み合い該送りネジの回転によってＡ・Ｂ方向に直進運動
するラック、５は支持台であり、両端部の垂直支持壁５
ａ，５ｂ間に送りネジ２が軸受け部材６を介して、回転
自在に支持されている。また、一方の垂直支持壁５ｂに
アクチュエーター１がねじ７で取り付けられている。2. Description of the Related Art Conventionally, this type of moving mechanism is constructed as shown in FIG. In the figure, 1 is an actuator such as a stepping motor, and 2 is an actuator 1.
A feed screw 3 driven to rotate by a rack 3 which meshes with the feed screw 2 and moves linearly in the directions A and B by the rotation of the feed screw 5. Reference numeral 5 denotes a support base, and vertical support walls 5 at both ends.
The feed screw 2 is rotatably supported via a bearing member 6 between a and 5b. Further, the actuator 1 is attached to one vertical support wall 5b with a screw 7.
【０００３】上記ラック３は図５のＺ方向から見た図６
乃至図８に示すように、送りネジ２に接する送り歯３
ａ、不図示のバネ部材によるバネ圧によって送り歯３ａ
を送りネジ２押し付ける押し付け部３ｂ、ラック移動方
向の衝撃が加わったとき、送り歯３がネジ山を乗り越え
ないように設けた対向歯３ｃを備えている。４はラック
３の可動範囲を制限するストッパー（メカ端）であり、
図示例は左端のストッパーのみを図示したが、不図示の
右端のストッパーも存在する。The rack 3 is shown in FIG. 6 viewed from the Z direction in FIG.
To the feed screw 3 which is in contact with the feed screw 2 as shown in FIG.
a, the feed dog 3a by spring pressure by a spring member (not shown)
It is provided with a pressing portion 3b for pressing the feed screw 2 and a facing tooth 3c provided so that the feed tooth 3 does not get over the thread when an impact in the rack moving direction is applied. 4 is a stopper (mechanical end) that limits the movable range of the rack 3,
Although only the leftmost stopper is shown in the illustrated example, there is also a rightmost stopper not shown.
【０００４】次に動作について説明する。Next, the operation will be described.
【０００５】図６は送りネジ２が矢印（イ）方向に回転
し、ラック３が左方向に移動して、ストッパ４に当接し
た瞬間を示している。この状態からさらに、送りネジ２
が矢印（イ）方向に回転すると、図７に示すように、送
りネジ２のネジ山は左に進むが、ラック３はストッパ４
に当たって動けないため、送りネジ２のネジ山にその斜
面に沿ってのりあがっていく。このとき、対向歯３ｃも
送りネジ２のネジ山に接触し、ネジ山にその斜面に沿っ
てのりあがり、ラック３の送り歯３ａと対向歯３ｃの間
隔が弾性変形して広がり、ついには、図８に示すように
送りネジ２のネジ山頂点と、ラック３の送り歯３ａの頂
点が接し、且つ、送りネジ２のネジ山頂点と対向歯３ａ
の頂点とが接するところまでラック３の送り歯３ａと対
向歯３ｃの間隔が広がる。FIG. 6 shows the moment when the feed screw 2 rotates in the direction of arrow (a), the rack 3 moves to the left, and comes into contact with the stopper 4. From this state, feed screw 2
When is rotated in the direction of arrow (a), as shown in FIG. 7, the screw thread of the feed screw 2 advances to the left, but the rack 3 stops at the stopper 4.
Since it cannot move because it hits, it climbs along the slope of the thread of the feed screw 2. At this time, the opposing tooth 3c also comes into contact with the thread of the feed screw 2 and rises along the slope of the thread, and the gap between the feeding tooth 3a of the rack 3 and the opposing tooth 3c is elastically deformed and widens, and finally, As shown in FIG. 8, the apex of the feed screw 2 and the apex of the feed tooth 3a of the rack 3 are in contact with each other, and the apex of the feed screw 2 and the opposed tooth 3a.
The distance between the feed dog 3a and the facing tooth 3c of the rack 3 is widened to the point where the apex of the rack 3 contacts.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記従
来例では、対向歯が送りネジをはさんで送り歯の正面に
あり、常に送りネジの谷部に位置しているため、図８の
状態位置で送りネジ２の回転が一度止まると、再起動時
にアクチュエータ１の力だけでは動けなくなるというく
いつき現象が生じるとの課題があった。However, in the above-mentioned conventional example, since the opposing tooth is located in front of the feed tooth with the feed screw interposed therebetween and is always located in the valley portion of the feed screw, the state position shown in FIG. However, there is a problem that once the rotation of the feed screw 2 is stopped, a clinging phenomenon occurs in that the feed screw 2 cannot be moved only by the force of the actuator 1 at the time of restart.
【０００７】この発明は上記のような課題を解決するた
めになされたもので、「くいつき現象」を起こしにく
い、送りネジとラックとによって構成された移動機構お
よび該移動機構を備えた光学機器を得ることを目的とす
る。The present invention has been made in order to solve the above problems, and provides a moving mechanism composed of a feed screw and a rack and an optical apparatus having the moving mechanism, which is less likely to cause the "clogging phenomenon". The purpose is to get.
【０００８】[0008]
【課題を解決するための手段】請求項１記載の発明に係
る移動機構は、回転する送りネジとそれにかみ合うラッ
クによって構成された移動機構において、前記送りネジ
の少なくとも一端部にネジの無い領域を設け、前記ラッ
クは送りネジに常時接する複数の送り歯と、この送り歯
を送りネジに押し付ける押し付け部と、常時は前記送り
ネジに接しておらず、前記送り歯が送りネジ面を乗り越
えるときにのみ、送りネジ歯と当接するように送りネジ
を挟んで前記送り歯の反対側に設けた複数の対向歯を有
し、この対向歯は前記送り歯に対して移動方向にオフセ
ットした位置に設け、前記ラックの可動範囲端で前記対
向歯が前記ネジの無い領域にくるように構成したもので
ある。According to a first aspect of the present invention, there is provided a moving mechanism including a rotating feed screw and a rack which meshes with the feed screw, wherein at least one end of the feed screw has a screw-free region. The rack is provided with a plurality of feed teeth that are always in contact with the feed screw, a pressing portion that presses the feed tooth against the feed screw, and is not always in contact with the feed screw when the feed tooth crosses the feed screw surface. Only has a plurality of opposing teeth provided on the opposite side of the feed tooth with the feed screw interposed therebetween so as to come into contact with the feed screw tooth, and the opposing tooth is provided at a position offset in the moving direction with respect to the feed tooth. The opposed teeth are located in the screw-free region at the movable range end of the rack.
【０００９】請求項２記載の発明に係る光学機器は、請
求項１記載の移動機構を用いて、レンズを光軸方向に移
動させるレンズ鏡筒を備えたものである。An optical apparatus according to a second aspect of the present invention includes a lens barrel for moving the lens in the optical axis direction by using the moving mechanism according to the first aspect.
【００１０】[0010]
【発明の実施の形態】以下、この発明の実施の一形態に
ついて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below.
【００１１】実施の形態１．図１はこの発明の実施の形
態１による移動機構を示す構成である。図において、２
は両端部（図で左端のみ示す）にネジ山の無い領域２ａ
が設けられた送りネジであり、前記図５に示すように、
軸受け部材６を介して回転自在に垂直支持壁５ａ，５ｂ
（図１では垂直指示壁５ｂは図示せず）に支持され、不
図示のアクチュエーターによって回転駆動される。３は
ラックであり、このラック３は送りネジ２に接する送り
歯３ａ、バネ圧等で送り歯３ａを送りネジ２に押し付け
る押し付け部３ｂ、ラック３にラック移動方向の衝撃力
が加わったときに、送り歯３ａが送りネジ２のネジ山を
乗り越えないようにするために、送り歯３ａからラック
３の一方の移動方向に所定量Ｄだけオフセットさせた
（ズレた）位置に設けた第１の対向歯３ｃ、送り歯３ａ
からラックの他方の移動方向に所定量Ｄだけオフセット
させた（ズレた）位置に設けた第２の対向歯３ｄを備え
ている。Embodiment 1. 1 is a configuration showing a moving mechanism according to a first embodiment of the present invention. In the figure, 2
Is a region 2a with no thread at both ends (only the left end is shown in the figure)
Is a feed screw provided with, as shown in FIG.
Vertical support walls 5a, 5b rotatably via bearing members 6
(The vertical indicator wall 5b is not shown in FIG. 1) and is rotationally driven by an actuator (not shown). Reference numeral 3 denotes a rack. The rack 3 has a feed dog 3a that is in contact with the feed screw 2, a pressing portion 3b that presses the feed dog 3a against the feed screw 2 by spring pressure, etc. When an impact force in the rack moving direction is applied to the rack 3. In order to prevent the feed dog 3a from climbing over the thread of the feed screw 2, the first tooth provided at a position offset (shifted) by a predetermined amount D from the feed dog 3a in one moving direction of the rack 3. Opposing tooth 3c, feed tooth 3a
The second opposing tooth 3d is provided at a position offset (shifted) by a predetermined amount D in the other movement direction of the rack.
【００１２】そして、上記ラック３がストッパ４に当接
する可動範囲の一方の端に来たとき、第１の対向歯３ｃ
が送りネジ２の一方のネジの無い領域２ａに来るように
しておき、ラック３が他方の端に来たとき、第２の対向
歯３ｄが送りネジの他方のネジの無い領域（図示せず）
に来るようにしておく。なお、ラック３の可動範囲を制
限する上記ストッパー（メカ端）４は、送りネジ２の両
端に設けられているが、図示例はその一端側のみを示
す。When the rack 3 comes to one end of the movable range where it abuts on the stopper 4, the first opposed tooth 3c is formed.
Is placed in one of the screw-free regions 2a of the feed screw 2, and when the rack 3 comes to the other end, the second opposing tooth 3d is provided in the other screw-free region of the feed screw (not shown). )
To come to. The stoppers (mechanical ends) 4 for limiting the movable range of the rack 3 are provided at both ends of the feed screw 2, but the illustrated example shows only one end side thereof.
【００１３】次に動作について説明する。図１は送りネ
ジ２が矢印（イ）方向に回転し、ラック３が左方向に移
動してストッパ４に当接した瞬間を示している。この状
態からさらに送りネジ２が矢印（イ）方向に回転する
と、図２に示すように、送りネジ２のネジ山は左に進む
が、ラック３はストッパ４に当たって動けないため、送
りネジ２のネジ山の斜面に沿ってのりあがっていく。こ
のとき、第１の対向歯３ｃは、送りネジ２のネジ山の無
い領域２ａに位置するため「乗り上がり現象」は起きな
いが、第２の対向歯３ｄでは、「乗り上がり現象」を生
じ、ラック３の送り歯３ａと第２の対向歯３ｄは送りネ
ジ２のネジ山の斜面に沿って乗り上がり、送り歯３ａと
第２の対向歯３ｄの間隔が弾性変形して広がっていく。
このため、第２の対向歯３ｄに近い送り歯３ａと該第２
の対向歯とは、送りネジ２から図示した矢印方向の力Ｆ
ａと力Ｆｃを受け、ラック３は点Ｐを中心に右回りに動
くことになる。Next, the operation will be described. FIG. 1 shows the moment when the feed screw 2 rotates in the direction of arrow (a), the rack 3 moves to the left and contacts the stopper 4. When the feed screw 2 further rotates in this direction from this state, as shown in FIG. 2, the thread of the feed screw 2 moves to the left, but the rack 3 hits the stopper 4 and cannot move. It goes up along the slope of the screw thread. At this time, since the first facing teeth 3c are located in the region 2a where the feed screw 2 has no thread, the "climbing phenomenon" does not occur, but the second facing teeth 3d causes the "climbing phenomenon". The feed dog 3a of the rack 3 and the second counter tooth 3d ride up along the slope of the thread of the feed screw 2, and the gap between the feed dog 3a and the second counter tooth 3d elastically deforms and widens.
Therefore, the feed dog 3a close to the second opposed tooth 3d and the second
Opposite teeth are the force F from the feed screw 2 in the direction of the arrow shown in the figure.
Upon receiving a and the force Fc, the rack 3 moves clockwise around the point P.
【００１４】例えば、送りネジ２の外径は２．５０ｍｍ
で、送り歯３ａと第２の対向歯３ｄとのクリアランスは
２．６５ｍｍとなっているので、ラック３が点Ｐ中心に
右回りに回転していくと、約１０°回転したところで、
ラック３は図３に示すように、点Ｐを中心に傾き、第２
の対向歯３ｄが送りネジ山の頂上をスリ抜ける。For example, the outer diameter of the feed screw 2 is 2.50 mm.
Since the clearance between the feed dog 3a and the second opposing tooth 3d is 2.65 mm, when the rack 3 rotates clockwise about the point P, it rotates about 10 °,
As shown in FIG. 3, the rack 3 is tilted about the point P,
Opposed teeth 3d slip through the top of the feed screw thread.
【００１５】以上のように本実施の形態１によれば、ラ
ック３が可動範囲の端に移動し、さらに同方向への移動
力が加えられた場合、対向歯３ｄが送りネジ２の送りネ
ジ山をすり抜けるため「くいつき現象」は生じない。図
示例はラック３が図面の左方向に移動して、左側のスト
ッパー４に当った場合のみの説明であったが、ラック３
が右方向に移動して右側のストッパー（図示せず）に当
った場合も同様の動作となる。As described above, according to the first embodiment, when the rack 3 moves to the end of the movable range and a moving force in the same direction is applied, the opposing tooth 3d is the feed screw of the feed screw 2. As it slips through the mountains, the "clinging phenomenon" does not occur. The illustrated example is only for the case where the rack 3 moves to the left in the drawing and hits the left stopper 4, but the rack 3
The same operation is performed when is moved to the right and hits the right stopper (not shown).
【００１６】なお、図示例は送りネジ２の両端側にネジ
のない領域を設けたことを前提に説明したが、ラック３
が一方向にしか移動しない構成の場合は、そのラックが
移動する方向の送りネジ２の端にのみネジのない領域を
設ければよい。Although the illustrated example has been described on the assumption that screw-free regions are provided on both ends of the feed screw 2, the rack 3
In the case of a configuration in which the rack moves only in one direction, it is sufficient to provide a screw-free region only at the end of the feed screw 2 in the direction in which the rack moves.
【００１７】実施の形態２．図４は実施の形態１による
移動機構をレンズの移動に用いたレンズ鏡筒１１を備え
た光学機器本体１２を示す外観図であり、レンズの移動
を円滑に行うことができる。Embodiment 2 FIG. FIG. 4 is an external view showing an optical device body 12 including a lens barrel 11 that uses the moving mechanism according to the first embodiment to move a lens, and the lens can be moved smoothly.
【００１８】[0018]
【発明の効果】以上説明したように、この発明によれ
ば、送りネジの少なくとも一端側にネジのない領域を設
け、ラックの送り歯の両側位置から該ラックの移動方向
に所定量オフセットさせた位置に第１、第２の対向歯を
設け、ラックが可動範囲端に達したとき前記一方の対向
歯がネジのない領域に位置するように構成したので、送
りネジとラックの形状を変更するだけで、部分点数を増
やすことなく、「くいつき現象」の発生しにくい移動機
構を得ることができる効果がある。As described above, according to the present invention, at least one end side of the feed screw is provided with a screwless region, and the rack is offset by a predetermined amount from both positions of the feed dog of the rack. Since the first and second facing teeth are provided at the position and the one facing tooth is located in the screw-free area when the rack reaches the movable range end, the shapes of the feed screw and the rack are changed. Only by doing so, it is possible to obtain a moving mechanism in which the "clogging phenomenon" is unlikely to occur without increasing the number of partial points.
【図１】この発明の実施の形態１による移動機構を示す
構成図。FIG. 1 is a configuration diagram showing a moving mechanism according to a first embodiment of the present invention.
【図２】この実施の形態１の動作を説明する図。FIG. 2 is a diagram for explaining the operation of the first embodiment.
【図３】この実施の形態１の動作を説明する図。FIG. 3 is a diagram for explaining the operation of the first embodiment.
【図４】この発明の実施の形態２による光学機器の外観
図である。FIG. 4 is an external view of an optical device according to a second embodiment of the present invention.
【図５】従来の移動機構の取付け状態を示す斜視図。FIG. 5 is a perspective view showing a mounting state of a conventional moving mechanism.
【図６】従来の移動機構の要部を示す構成図。FIG. 6 is a configuration diagram showing a main part of a conventional moving mechanism.
【図７】従来の移動機構の動作を説明する図。FIG. 7 is a diagram illustrating an operation of a conventional moving mechanism.
【図８】従来の移動機構の動作を説明する図。FIG. 8 is a diagram illustrating an operation of a conventional moving mechanism.
２ 送りネジ ３ ラック ３ａ 送り歯 ３ｂ 押し付け部 ３ｃ 第１の対向歯 ３ｄ 第２の対向歯 １１ レンズ鏡筒 １２ 光学機器 2 feed screw 3 rack 3a feed tooth 3b pressing portion 3c first opposing tooth 3d second opposing tooth 11 lens barrel 12 optical device
Claims (2)
クによって構成される移動機構において、前記送りネジ
の少なくとも一端部にネジの無い領域を設け、前記ラッ
クは送りネジに常時接する複数の送り歯と、この送り歯
を送りネジに押し付ける押し付け部と、常時は前記送り
ネジに接しておらず、前記送り歯が送りネジ面を乗り越
えるときにのみ、送りネジ歯と当接するように送りネジ
を挟んで前記送り歯の反対側に設けた複数の対向歯を有
し、この対向歯は前記送り歯に対して移動方向にオフセ
ットした位置に設け、前記ラックの可動範囲端で前記対
向歯が前記ネジの無い領域にくるように構成したことを
特徴とする移動機構。1. A moving mechanism composed of a rotating feed screw and a rack meshing with the feed screw, wherein at least one end of the feed screw is provided with a screw-free region, and the rack has a plurality of feed teeth which are always in contact with the feed screw. The pressing portion for pressing the feed dog against the feed screw and the feed screw are not always in contact with the feed screw, and the feed screw is sandwiched so as to come into contact with the feed screw tooth only when the feed tooth crosses the feed screw surface. It has a plurality of facing teeth provided on the opposite side of the feed dog, and the facing teeth are provided at positions offset in the moving direction with respect to the feed teeth, and the facing teeth have no screw at the movable range end of the rack. A moving mechanism characterized by being configured so as to come to the area.
ズを光軸方向に移動させるレンズ鏡筒を備えたことを特
徴とする光学機器。2. An optical apparatus comprising a lens barrel for moving a lens in an optical axis direction by using the moving mechanism according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9599096A JPH09258087A (en) | 1996-03-26 | 1996-03-26 | Moving mechanism and optical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9599096A JPH09258087A (en) | 1996-03-26 | 1996-03-26 | Moving mechanism and optical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09258087A true JPH09258087A (en) | 1997-10-03 |
Family
ID=14152579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9599096A Pending JPH09258087A (en) | 1996-03-26 | 1996-03-26 | Moving mechanism and optical equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09258087A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006330543A (en) * | 2005-05-30 | 2006-12-07 | Konica Minolta Photo Imaging Inc | Lens barrel |
| JP2008203356A (en) * | 2007-02-16 | 2008-09-04 | Nikon Corp | Driving apparatus, lens barrel and camera |
| JP2009086396A (en) * | 2007-10-01 | 2009-04-23 | Canon Inc | Positioning device, positioning method, and optical apparatus |
| JP2009086427A (en) * | 2007-10-01 | 2009-04-23 | Canon Inc | Positioning device, positioning method and optical apparatus |
| JP2009210959A (en) * | 2008-03-06 | 2009-09-17 | Chinontec Kk | Driving mechanism for optical element, driving device for optical element and optical equipment |
| US8861103B2 (en) | 2011-06-07 | 2014-10-14 | Canon Kabushiki Kaisha | Lens driving apparatus and optical apparatus having the same |
| US9052205B2 (en) | 2011-10-26 | 2015-06-09 | Sony Corporation | Terminal device, information processing method, and program |
| WO2015093186A1 (en) * | 2013-12-20 | 2015-06-25 | ソニー株式会社 | Optical pickup, disk drive device, and optical element drive device |
| JP5776018B2 (en) * | 2009-07-23 | 2015-09-09 | パナソニックＩｐマネジメント株式会社 | Lens barrel and imaging device |
-
1996
- 1996-03-26 JP JP9599096A patent/JPH09258087A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006330543A (en) * | 2005-05-30 | 2006-12-07 | Konica Minolta Photo Imaging Inc | Lens barrel |
| JP2008203356A (en) * | 2007-02-16 | 2008-09-04 | Nikon Corp | Driving apparatus, lens barrel and camera |
| EP1959296B1 (en) * | 2007-02-16 | 2019-05-01 | Nikon Corporation | Driving apparatus, lens barrel and camera |
| JP2009086396A (en) * | 2007-10-01 | 2009-04-23 | Canon Inc | Positioning device, positioning method, and optical apparatus |
| JP2009086427A (en) * | 2007-10-01 | 2009-04-23 | Canon Inc | Positioning device, positioning method and optical apparatus |
| JP2009210959A (en) * | 2008-03-06 | 2009-09-17 | Chinontec Kk | Driving mechanism for optical element, driving device for optical element and optical equipment |
| JP5776018B2 (en) * | 2009-07-23 | 2015-09-09 | パナソニックＩｐマネジメント株式会社 | Lens barrel and imaging device |
| US8861103B2 (en) | 2011-06-07 | 2014-10-14 | Canon Kabushiki Kaisha | Lens driving apparatus and optical apparatus having the same |
| US9052205B2 (en) | 2011-10-26 | 2015-06-09 | Sony Corporation | Terminal device, information processing method, and program |
| WO2015093186A1 (en) * | 2013-12-20 | 2015-06-25 | ソニー株式会社 | Optical pickup, disk drive device, and optical element drive device |
| JPWO2015093186A1 (en) * | 2013-12-20 | 2017-03-16 | ソニー株式会社 | Optical pickup, disk drive device, and optical element drive device |
| US9697864B2 (en) | 2013-12-20 | 2017-07-04 | Sony Corporation | Optical pickup, disk drive device, and optical element driving device |
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