JP3438220B2 - Camera lens barrel device - Google Patents
Camera lens barrel deviceInfo
- Publication number
- JP3438220B2 JP3438220B2 JP17691094A JP17691094A JP3438220B2 JP 3438220 B2 JP3438220 B2 JP 3438220B2 JP 17691094 A JP17691094 A JP 17691094A JP 17691094 A JP17691094 A JP 17691094A JP 3438220 B2 JP3438220 B2 JP 3438220B2
- Authority
- JP
- Japan
- Prior art keywords
- lens barrel
- photographing lens
- mount
- photographing
- positioning pin
- 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
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は撮影レンズ鏡胴装置に係
り、特に監視用カメラ等のテレビカメラに用いられる撮
影レンズのフォーカス調整機能を備えた撮影レンズ鏡胴
装置に関する。
【０００２】
【従来の技術】従来、この種の撮影レンズは、テレビカ
メラ本体にマウントを介して取り付けられ、組み立て時
に撮影レンズ鏡胴をマウントに対して前後方向に移動さ
せることにより、カメラ側の結像面に焦点合わせを行う
ようにしている。また、前記撮影レンズ鏡胴には、カメ
ラ側の結像面に焦点合わせができる位置に専用の位置決
め用ピンが予め固着されており、この専用の位置決め用
ピンで撮影レンズ鏡胴をマウントに対して位置決めする
ようになっている。
【０００３】
【発明が解決しようとする課題】しかしながら、従来の
撮影レンズ鏡胴装置では、撮影レンズ毎に専用の位置決
めピンを撮影レンズ鏡胴に固着しているので、撮影レン
ズの種類に応じた数だけ撮影レンズ鏡胴を揃えなければ
ならないという欠点がある。本発明はこのような事情に
鑑みてなされたもので、撮影レンズ鏡胴を共通化できる
撮影レンズ鏡胴装置を提供することを目的とする。
【０００４】
【課題を解決するための手段】本発明は、前記目的を達
成するために、カメラ側に装着されるマウントと、該マ
ウントに前後方向に移動自在に支持された撮影レンズ鏡
胴とから成り、該撮影レンズ鏡胴を前記マウントに対し
て前後方向に移動させてカメラ側の結像面に焦点合わせ
を行う撮影レンズ鏡胴装置に於いて、前記撮影レンズ鏡
胴は、ネジによって交換可能でかつ焦点距離の異なる撮
影レンズを保持したレンズ枠を備えて、各撮影レンズに
対して共通化され、前記マウント、又は撮影レンズ鏡胴
には、位置決め用溝が形成されると共に撮影レンズの種
類に応じて撮影レンズ鏡胴をカメラ側の結像面に焦点合
わせするようにマウントに対して位置調整する位置決め
用ピンがその径を変えることにより撮影レンズの種類毎
に設けられ、前記位置決め用ピンは撮影レンズの種類に
応じて選択されて前記位置決め用溝に嵌入されることを
特徴としている。
【０００５】本発明によれば、撮影レンズの種類に応じ
て位置決め用ピンを選択し、この選択した位置決めピン
をマウント、又は撮影レンズ鏡胴に取り付ける。これに
より、撮影レンズ鏡胴は、その撮影レンズに対応した位
置に前記位置決め用ピンによってマウントに位置決めさ
れるので、主たる撮影レンズ鏡胴を共通化できる。
【０００６】
【実施例】以下添付図面に従って本発明に係る撮影レン
ズ鏡胴装置の好ましい実施例について詳説する。図１
は、本発明に係る撮影レンズ鏡胴装置が監視用カメラに
適用された実施例を示す半断面図である。同図に示すよ
うにカメラ本体１０側には、円筒状に形成されたマウン
ト１２がネジ込み固定され、このマウント１２には撮影
レンズ鏡胴１４がネジとネジとの作用によりマウント１
２に対して前後方向（図中左右方向）に移動自在に装着
される。
【０００７】前記撮影レンズ鏡胴１４は、その内部に撮
影レンズを構成する前レンズ群１６と後レンズ群１８と
が各々の光軸を一致させた状態で配置されている。前レ
ンズ群１６は、前レンズ枠２０に保持されて撮影レンズ
鏡胴１４の前部にネジ固定され、また、後レンズ群１８
は後レンズ枠２２に保持されて撮影レンズ鏡胴１４の後
部にネジ固定されている。
【０００８】本実施例の撮影レンズ鏡胴１４は、前レン
ズ枠２０及び後レンズ枠２２をネジによって着脱可能と
しており、従って、前レンズ枠２０及び後レンズ枠２２
を、焦点距離の異なる撮影レンズを保持した別のレンズ
枠に交換することによって、主たる撮影レンズ鏡胴の共
通化が図られている。前記マウント１２の外周面には孔
部２４が穿設され、この孔部２４には位置決め用ピン２
６が取り出し可能に挿入される。前記位置決め用ピン２
６の先端小径部２８は、撮影レンズ鏡胴１４の外周面に
形成された帯状の溝３０内に突出されている。また、先
端小径部２８は、撮影レンズ鏡胴１４の後方移動で溝３
０の図中左縁部３０Ａに当接するまでの範囲で、ＣＣＤ
ユニット３２の結像面３４上に於いて焦点を合わせるこ
とができる大きさに形成されている。
【０００９】このように構成された本実施例の撮影レン
ズ鏡胴装置によれば、先ず、撮影レンズ鏡胴１４に前レ
ンズ枠２０と後レンズ枠２２とをネジ固定する。そし
て、前レンズ群１６と後レンズ群１８とによる焦点距離
に対応した位置決め用ピン２６を、マウント１２の孔部
２４から挿入する。図３は、図１に示した撮影レンズ鏡
胴１４に、前レンズ群４０を保持した前レンズ枠４２
と、後レンズ群４４を保持した後レンズ枠４６とをネジ
固定したものである。前記前レンズ群４０と後レンズ群
４２とから成る撮影レンズは、図１に示した撮影レンズ
よりも焦点距離が短めに設定されている。
【００１０】従って、図１に示した撮影レンズ鏡胴１４
の後方移動量ｘ1 と比較して、図３に示した撮影レンズ
鏡胴１４の後方移動量ｘ2 を少なく規制しなければなら
ないため、図３の位置決め用ピン４８は図１の位置決め
用ピン２６の先端小径部２８よりも大きめ目に形成され
ている。また、この位置決め用ピン４８は、撮影レンズ
鏡胴１４の後方移動で溝３０の図中左縁部３０Ａに当接
するまでの範囲で、ＣＣＤユニット３２の結像面３４上
に於いて焦点を合わせることができる大きさに形成され
ている。
【００１１】本実施例の撮影レンズ鏡胴装置に於いて
も、図１、図２に示した実施例と同様に、撮影レンズ鏡
胴１４をマウント１２に対して回転させて後方に移動さ
せ、ピン４８を溝３０の左縁部３０Ａに当接させるまで
の範囲でＣＣＤユニット３２の結像面３４上で焦点合わ
せを行うことができる。このように本実施例では図１〜
図３に示したように、撮影レンズを交換する毎に、位置
決めピンもその撮影レンズの異なる焦点距離に対応する
繰り出し量に合った位置決め用ピンに交換するようにし
たので、撮影レンズ鏡胴１２を共通化しても少ない部品
の変更で多種のレンズに対応することができる。
【００１２】図４は、本発明に係る撮影レンズ鏡胴装置
の他の実施例を示す半断面図であり、図１〜図３に示し
た実施例と同一若しくは類似の部材については同一の符
号を付して説明する。同図に示す撮影レンズ鏡胴装置
は、位置決め用ピン５０の規制用溝５２をマウント１２
側に形成したもので、このピン５０はマウント１２の外
周面に穿設された孔部５４から溝５２内に挿入されて撮
影レンズ鏡胴１４側の孔部５６に位置決めされる。ま
た、前記ピン５０は、撮影レンズ鏡胴１４の前方移動で
溝５２の図中左縁部５２Ａに当接するまでの範囲で、Ｃ
ＣＤユニット３２の結像面３４上に於いて焦点を合わせ
ることができる大きさに形成されている。
【００１３】このように構成された本実施例の撮影レン
ズ鏡胴装置に於いても、図１〜図３に示した実施例と同
様に、撮影レンズ鏡胴１４をマウント１２に対して回転
させて前方に移動させ、ピン５０を図５に示すように溝
５２の左縁部５２Ａに当接するまでの範囲で、ＣＣＤユ
ニット３２の結像面３４上で焦点合わせを行うことがで
きる。
【００１４】図６は、図４に示した位置決め用ピン５０
の代わりに偏心した位置決め用ピンを使用したものであ
る。このピンは図６〜図８に示すように、溝５２の左端
部５２Ａと当接する直方体形状の本体ピン６０と、この
本体ピン６０に対して偏心した位置に植設された小径ピ
ン６２とから形成される。小径ピン６２は、撮影レンズ
鏡胴１４の孔部５６に固定されている。
【００１５】従って、本実施例では、本体ピン６０を回
転させて本体ピン６０の短面部６０Ａを溝５２の端面５
２Ａに向けると（図７参照）、撮影レンズ鏡胴１４の移
動量ｘ3 を短めに設定することができる。また、本体ピ
ン６０の長面部６０Ｂを溝５２の端面５２Ａに向けると
（図８参照）、撮影レンズ鏡胴１４の移動量ｘ4 を長め
に設定することができる。これにより、偏心した位置決
めピンを使用すれば、１つの位置決め用ピンで２種類の
フォーカス移動量の異なった撮影レンズに対応すること
ができる。
【００１６】
【発明の効果】以上説明したように本発明に係る撮影レ
ンズ鏡胴装置によれば、撮影レンズの種類に応じて位置
決め用部材を選択し、この選択した位置決め部材をマウ
ント、又は撮影レンズ鏡胴に取り付けるようにしたの
で、主たる撮影レンズ鏡胴を共通化できる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographing lens barrel device, and more particularly to a photographing lens having a focus adjusting function of a photographing lens used for a television camera such as a monitoring camera. The present invention relates to a lens barrel device. 2. Description of the Related Art Conventionally, a photographing lens of this type is mounted on a television camera body via a mount, and the assembling lens on the camera side is moved by moving the photographing lens barrel with respect to the mount during assembly. Focusing is performed on the imaging surface. Further, a dedicated positioning pin is fixed to the photographing lens barrel in advance at a position where focusing can be performed on the image forming surface of the camera, and the photographing lens barrel is mounted on the mount with the dedicated positioning pin. Position. [0003] However, in the conventional photographing lens barrel apparatus, a dedicated positioning pin is fixed to the photographing lens barrel for each photographing lens. There is a drawback in that the photographing lens barrels must be aligned by a number. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a photographing lens barrel device that can share a photographing lens barrel. [0004] In order to achieve the above object, the present invention provides a mount mounted on a camera, and a photographic lens barrel supported on the mount so as to be movable in the front-rear direction. made, at the photographic lens barrel in the photographing lens barrel apparatus for performing focusing on the imaging surface of the camera side is moved back and forth with respect to the mounting, the imaging lens
The barrel is interchangeable with screws and has different focal lengths.
Equipped with a lens frame holding a shadow lens,
A mounting groove is formed in the mount or the photographing lens barrel, and the mounting lens or the photographing lens barrel is mounted so as to focus the photographing lens barrel on the image forming surface of the camera according to the type of the photographing lens. Positioning pins for position adjustment are provided for each type of photographing lens by changing its diameter, and the positioning pins are adapted to the type of photographing lens.
It is characterized in that it is selected in accordance with this and fitted into the positioning groove . According to the present invention, a positioning pin is selected according to the type of a photographic lens, and the selected positioning pin is mounted on a mount or a photographic lens barrel. Thus, the photographing lens barrel is positioned on the mount by the positioning pin at a position corresponding to the photographing lens, so that the main photographing lens barrel can be shared. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a photographic lens barrel apparatus according to a preferred embodiment of the present invention. FIG.
1 is a half sectional view showing an embodiment in which a taking lens barrel device according to the present invention is applied to a monitoring camera. As shown in FIG. 1, a mount 12 formed in a cylindrical shape is screwed and fixed to the camera body 10 side. A photographing lens barrel 14 is mounted on the mount 12 by the action of a screw.
2 is mounted so as to be movable in the front-rear direction (left-right direction in the figure). The photographing lens barrel 14 has a front lens group 16 and a rear lens group 18 which constitute a photographing lens disposed therein, with their optical axes aligned. The front lens group 16 is held by the front lens frame 20 and fixed to the front of the taking lens barrel 14 with screws.
Is held by the rear lens frame 22 and is screwed to the rear of the taking lens barrel 14. In the photographing lens barrel 14 of the present embodiment, the front lens frame 20 and the rear lens frame 22 are detachable by screws.
Is replaced by another lens frame holding a photographing lens having a different focal length, thereby achieving a common photographing lens barrel. A hole 24 is formed in the outer peripheral surface of the mount 12, and the positioning pin 2 is formed in the hole 24.
6 is removably inserted. The positioning pin 2
The small-diameter portion 28 at the end of the projection 6 projects into a band-shaped groove 30 formed on the outer peripheral surface of the taking lens barrel 14. Further, the tip small diameter portion 28 is moved to the groove 3 by the rearward movement of the taking lens barrel 14.
In the range up to contact with the left edge 30A in FIG.
It is formed in such a size that it can be focused on the image plane 34 of the unit 32. According to the photographing lens barrel apparatus of the present embodiment having the above-described configuration, first, the front lens frame 20 and the rear lens frame 22 are fixed to the photographing lens barrel 14 by screws. Then, the positioning pins 26 corresponding to the focal lengths of the front lens group 16 and the rear lens group 18 are inserted through the holes 24 of the mount 12. FIG. 3 shows a front lens frame 42 holding a front lens group 40 on the taking lens barrel 14 shown in FIG.
And a rear lens frame 46 holding the rear lens group 44 and fixed by screws. The photographing lens comprising the front lens group 40 and the rear lens group 42 has a shorter focal length than the photographing lens shown in FIG. Accordingly, the taking lens barrel 14 shown in FIG.
Compared with the rearward movement amount x 1, since it is necessary to reduce restricting backward movement amount x 2 of the photographic lens barrel 14 shown in FIG. 3, the positioning pins 48 of Figure 3 is positioning pin of FIG. 1 26 is formed larger than the tip small diameter portion 28. The positioning pin 48 focuses on the image plane 34 of the CCD unit 32 in a range from the rearward movement of the taking lens barrel 14 to the contact with the left edge 30A of the groove 30 in the drawing. It is formed in a size that can be used. In the photographing lens barrel apparatus of this embodiment, as in the embodiment shown in FIGS. 1 and 2, the photographing lens barrel 14 is rotated with respect to the mount 12 and moved rearward. Focusing can be performed on the imaging surface 34 of the CCD unit 32 within a range until the pin 48 comes into contact with the left edge 30A of the groove 30. Thus, in this embodiment, FIGS.
As shown in FIG. 3, every time the photographing lens is replaced, the positioning pin is also replaced with a positioning pin corresponding to the extension amount corresponding to a different focal length of the photographing lens. Can be used for a wide variety of lenses with a small number of component changes. FIG. 4 is a half sectional view showing another embodiment of the taking lens barrel apparatus according to the present invention, and the same or similar members as those of the embodiment shown in FIGS. The description will be made with reference to FIG. In the photographing lens barrel device shown in FIG.
The pin 50 is inserted into the groove 52 from a hole 54 formed in the outer peripheral surface of the mount 12 and positioned in the hole 56 on the photographing lens barrel 14 side. The pin 50 is moved in a range from the forward movement of the photographing lens barrel 14 until the pin 50 contacts the left edge 52A of the groove 52 in the drawing.
It is formed in such a size that it can be focused on the image plane 34 of the CD unit 32. In the photographic lens barrel apparatus of the present embodiment having the above-described configuration, the photographic lens barrel 14 is rotated with respect to the mount 12 in the same manner as in the embodiment shown in FIGS. 5, the focusing can be performed on the image plane 34 of the CCD unit 32 within a range until the pin 50 contacts the left edge 52A of the groove 52 as shown in FIG. FIG. 6 shows the positioning pin 50 shown in FIG.
Instead, an eccentric positioning pin is used. As shown in FIGS. 6 to 8, this pin is composed of a rectangular parallelepiped main body pin 60 abutting on the left end portion 52 </ b> A of the groove 52 and a small diameter pin 62 implanted at a position eccentric to the main body pin 60. It is formed. The small diameter pin 62 is fixed to the hole 56 of the taking lens barrel 14. Therefore, in this embodiment, the main body pin 60 is rotated so that the short surface portion 60A of the main body pin 60 is
Turning to 2A (see FIG. 7), the movement amount x 3 of the photographic lens barrel 14 can be set short to. Furthermore, when directing the long face 60B of the body pin 60 to the end surface 52A of the groove 52 (see FIG. 8), the movement amount x 4 of the photographic lens barrel 14 can be set longer. Thus, if an eccentric positioning pin is used, one positioning pin can correspond to two types of photographing lenses having different focus movement amounts. As described above, according to the photographing lens barrel apparatus according to the present invention, a positioning member is selected according to the type of the photographing lens, and the selected positioning member is mounted or photographed. Since the camera is mounted on the lens barrel, the main photographing lens barrel can be used in common.
【図面の簡単な説明】
【図１】本発明に係る撮影レンズ鏡胴装置が監視用カメ
ラに適用された実施例を示す半断面図
【図２】図１に示した撮影レンズ鏡胴装置で焦点合わせ
を実施した状態を示す半断面図
【図３】撮影レンズと位置決め用ピンとを交換した実施
例を示す半断面図
【図４】マウント側に位置決め用ピンの規制用溝を形成
した実施例を示す半断面図
【図５】図４に示した撮影レンズ鏡胴装置で焦点合わせ
を実施した状態を示す半断面図
【図６】偏心した位置決め用ピンが適用された撮影レン
ズ鏡胴装置の実施例を示す半断面図
【図７】偏心した位置決め用ピンによる撮影レンズ鏡胴
の移動量の説明図
【図８】偏心した位置決め用ピンによる撮影レンズ鏡胴
の移動量の説明図
【符号の説明】
１０…カメラ本体
１２…マウント
１４…撮影レンズ鏡胴
２６、４８、５０、６０…位置決め用ピン
３０、５２…溝
３２…ＣＣＤユニットBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a half sectional view showing an embodiment in which a photographing lens barrel device according to the present invention is applied to a monitoring camera. FIG. 2 is a photographing lens barrel device shown in FIG. FIG. 3 is a half cross-sectional view showing a state in which focusing is performed. FIG. 3 is a half cross-sectional view showing an embodiment in which a photographing lens and a positioning pin are replaced. FIG. 4 is an embodiment in which a positioning groove for a positioning pin is formed on a mount side. FIG. 5 is a half sectional view showing a state in which focusing is performed by the photographing lens barrel device shown in FIG. 4; FIG. 6 is a photographing lens barrel device to which an eccentric positioning pin is applied; FIG. 7 is an explanatory view of an amount of movement of a taking lens barrel by an eccentric positioning pin. FIG. 8 is an explanatory view of an amount of movement of a taking lens barrel by an eccentric positioning pin. Description 10 Camera body 12 Mount 14 Shadow lens barrel 26,48,50,60 ... positioning pins 30, 52 ... groove 32 ... CCD unit
フロントページの続き (56)参考文献 特開 平４−42206（ＪＰ，Ａ) 特開 平４−237007（ＪＰ，Ａ) 特開 平７−72544（ＪＰ，Ａ) 特開 平４−207358（ＪＰ，Ａ) 実開 平５−60045（ＪＰ，Ｕ) 実開 平５−73616（ＪＰ，Ｕ) 実公 昭35−33944（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.7，ＤＢ名) G02B 7/04 G03B 17/14 H04N 5/225 Continuation of the front page (56) References JP-A-4-42206 (JP, A) JP-A-4-237007 (JP, A) JP-A-7-72544 (JP, A) JP-A-4-207358 (JP , A) Japanese Utility Model Application Hei 5-60045 (JP, U) Japanese Utility Model Application Hei 5-73616 (JP, U) Japanese Utility Model Application No. 35-33944 (JP, Y1) (58) Fields surveyed (Int. Cl. 7 , DB G02B 7/04 G03B 17/14 H04N 5/225
Claims (1)
ントに前後方向に移動自在に支持された撮影レンズ鏡胴
とから成り、該撮影レンズ鏡胴を前記マウントに対して
前後方向に移動させてカメラ側の結像面に焦点合わせを
行う撮影レンズ鏡胴装置に於いて、前記撮影レンズ鏡胴は、ネジによって交換可能でかつ焦
点距離の異なる撮影レンズを保持したレンズ枠を備え
て、各撮影レンズに対して共通化され、 前記マウント、又は撮影レンズ鏡胴には、位置決め用溝
が形成されると共に撮影レンズの種類に応じて撮影レン
ズ鏡胴をカメラ側の結像面に焦点合わせするようにマウ
ントに対して位置調整する位置決め用ピンがその径を変
えることにより撮影レンズの種類毎に設けられ、前記位
置決め用ピンは撮影レンズの種類に応じて選択されて前
記位置決め用溝に嵌入されることを特徴とする撮影レン
ズ鏡胴装置。(57) [Claim 1] A mount mounted on a camera side, and a photographing lens barrel supported movably in the front-rear direction by the mount. In a photographing lens barrel apparatus that moves in the front-rear direction with respect to a mount to focus on an image plane on the camera side, the photographing lens barrel is interchangeable with a screw and has a focus.
Equipped with a lens frame that holds shooting lenses with different point distances
In addition, a common groove is used for each photographing lens, and the mount or the photographing lens barrel has a positioning groove.
And a positioning pin that adjusts the position of the lens barrel relative to the mount so that the lens barrel is focused on the image plane on the camera side according to the type of lens.
It provided for each type of photographing lens by obtaining the position
The positioning pin is selected according to the type of taking lens and
A photographing lens barrel device which is fitted into the positioning groove .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17691094A JP3438220B2 (en) | 1994-07-28 | 1994-07-28 | Camera lens barrel device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17691094A JP3438220B2 (en) | 1994-07-28 | 1994-07-28 | Camera lens barrel device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0843705A JPH0843705A (en) | 1996-02-16 |
| JP3438220B2 true JP3438220B2 (en) | 2003-08-18 |
Family
ID=16021900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17691094A Expired - Fee Related JP3438220B2 (en) | 1994-07-28 | 1994-07-28 | Camera lens barrel device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3438220B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100673966B1 (en) * | 1999-09-16 | 2007-01-24 | 삼성테크윈 주식회사 | Apparatus for detecting focus |
| JP2002341228A (en) * | 2001-05-15 | 2002-11-27 | Olympus Optical Co Ltd | Lens barrel |
| US7061699B2 (en) * | 2002-03-28 | 2006-06-13 | Seiko Epson Corporation | Projection lens, producing method of projection lens and projector having projection lens |
| DE102004009042B3 (en) | 2004-02-23 | 2005-09-15 | Leica Camera Ag | Interchangeable lens for rangefinder cameras |
| DE102006036890B4 (en) * | 2006-08-04 | 2008-07-31 | Leica Camera Ag | cylinder rings |
| KR102511533B1 (en) * | 2018-04-24 | 2023-03-20 | 한화비전 주식회사 | Lens assembly for a security camera and security camera having the same |
-
1994
- 1994-07-28 JP JP17691094A patent/JP3438220B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0843705A (en) | 1996-02-16 |
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