JP6131219B2 - Endoscope device - Google Patents

Endoscope device Download PDF

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JP6131219B2
JP6131219B2 JP2014125476A JP2014125476A JP6131219B2 JP 6131219 B2 JP6131219 B2 JP 6131219B2 JP 2014125476 A JP2014125476 A JP 2014125476A JP 2014125476 A JP2014125476 A JP 2014125476A JP 6131219 B2 JP6131219 B2 JP 6131219B2
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joint portion
holding member
actuator
endoscope apparatus
fitted
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JP2015192837A (en
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亮 北野
亮 北野
孝 矢代
孝 矢代
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Fujifilm Corp
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Description

本発明は、内視鏡装置に関する。   The present invention relates to an endoscope apparatus.

撮像素子と、光軸方向に移動可能な可動レンズを含む撮像光学系と、可動レンズを移動させるためのアクチュエータとが挿入部の先端部に設けられ、可動レンズを移動させることによって変倍やフォーカシングを行う内視鏡装置が知られている（例えば、特許文献１、２参照）。   An imaging optical system including an imaging element, a movable lens movable in the optical axis direction, and an actuator for moving the movable lens are provided at the distal end of the insertion portion, and zooming and focusing are performed by moving the movable lens. Endoscope apparatuses that perform the above are known (see, for example, Patent Documents 1 and 2).

特開２００１−２０８９５１号公報JP 2001-208951 A 特開２００４−１６３３７号公報JP 2004-16337 A

挿入部の先端部に設けられるアクチュエータは、極めて小型であり、概して高価である。そのため、例えば可動レンズの移動機構や可動レンズを含む撮像光学系に不具合が生じた場合などには、アクチュエータの再利用が望まれる。   The actuator provided at the distal end of the insertion portion is extremely small and generally expensive. Therefore, for example, when a malfunction occurs in the moving mechanism of the movable lens or the imaging optical system including the movable lens, it is desired to reuse the actuator.

特許文献２に記載された内視鏡装置では、アクチュエータによってカム環が回転され、カム環の回転に伴って可動レンズが移動される。アクチュエータを保持する小径アクチュエータハウジングは、可動レンズ及びカム環を保持するレンズハウジングとは別体に構成されており、小径アクチュエータハウジングはレンズハウジングと一体の大径アクチュエータハウジングに挿抜可能に構成されている。かかる構成によれば、可動レンズの移動機構や可動レンズを含む撮像光学系に不具合が生じた場合などに、小径アクチュエータハウジングをレンズハウジングと一体の大径アクチュエータハウジングから分離し、アクチュエータの再利用が可能となる。   In the endoscope apparatus described in Patent Document 2, the cam ring is rotated by the actuator, and the movable lens is moved along with the rotation of the cam ring. The small-diameter actuator housing that holds the actuator is configured separately from the lens housing that holds the movable lens and the cam ring, and the small-diameter actuator housing is configured so that it can be inserted into and removed from the large-diameter actuator housing integrated with the lens housing. . According to such a configuration, when a malfunction occurs in the moving mechanism of the movable lens or the imaging optical system including the movable lens, the small-diameter actuator housing is separated from the large-diameter actuator housing integrated with the lens housing, and the actuator can be reused. It becomes possible.

しかし、小径アクチュエータハウジングと大径アクチュエータハウジングとの間には、アクチュエータの反力を受けとめるに足る十分な接合強度が必要となる。上記のとおりアクチュエータは極めて小型であり、アクチュエータを保持する小径アクチュエータハウジングもまた極めて小型である。したがって、挿抜可能な嵌合による小径アクチュエータハウジングと大径アクチュエータハウジングとの接合では、両者の間の接合強度が不足して可動レンズの移動に支障をきたす虞がある。そこで、小径アクチュエータハウジングを大径アクチュエータハウジングに圧入して両者の間の接合強度を高めるとすると、両者の分離性が低下してアクチュエータの再利用が困難となる。   However, a sufficient joint strength is required between the small-diameter actuator housing and the large-diameter actuator housing to receive the reaction force of the actuator. As described above, the actuator is extremely small, and the small-diameter actuator housing that holds the actuator is also extremely small. Therefore, when the small-diameter actuator housing and the large-diameter actuator housing are joined by an insertable / removable fitting, there is a possibility that the joint strength between the two is insufficient and the movement of the movable lens may be hindered. Therefore, if the small-diameter actuator housing is press-fitted into the large-diameter actuator housing to increase the joint strength between the two, the separability between the two decreases, making it difficult to reuse the actuator.

本発明は、上述した事情に鑑みなされたものであり、アクチュエータの再利用が容易な内視鏡装置を提供することを目的としている。   The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an endoscope apparatus in which an actuator can be easily reused.

撮像素子と、光軸方向に移動可能な少なくとも一つの可動レンズを含む撮像光学系と、アクチュエータと、上記アクチュエータの駆動力を上記可動レンズに伝達して可動レンズを移動させる駆動部材と、上記アクチュエータを保持する第一保持部材と、上記可動レンズ及び上記駆動部材を保持する第二保持部材と、を備え、上記第一保持部材及び上記第二保持部材は、互いに接合される接合部をそれぞれ有しており、上記アクチュエータと上記駆動部材とは分離可能に連結され、上記第一保持部材の上記接合部と上記第二保持部材の上記接合部とは、分離可能に互いに接着されており、上記第一保持部材の上記接合部及び上記第二保持部材の上記接合部は、互いに嵌合可能な筒状にそれぞれ形成されており、互いに嵌合した状態において外側の接合部の先端に沿って接着されている内視鏡装置。 An imaging optical system including an imaging element, at least one movable lens movable in the optical axis direction, an actuator, a driving member that transmits the driving force of the actuator to the movable lens and moves the movable lens, and the actuator And a second holding member that holds the movable lens and the driving member, and the first holding member and the second holding member have joint portions that are joined to each other. The actuator and the driving member are detachably connected, and the joint portion of the first holding member and the joint portion of the second holding member are detachably bonded to each other , The joint portion of the first holding member and the joint portion of the second holding member are each formed in a cylindrical shape that can be fitted to each other, and are outside in a state of being fitted to each other. An endoscope apparatus which is bonded along the tip of the joint.

本発明によれば、アクチュエータの再利用が容易な内視鏡装置を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the endoscope apparatus with which reuse of an actuator is easy can be provided.

本発明の実施形態を説明するための、内視鏡装置の挿入部先端部の一例の構成を示す図である。It is a figure which shows the structure of an example of the insertion part front-end | tip part of the endoscope apparatus for demonstrating embodiment of this invention. 図１の内視鏡装置の挿入部先端部の構成を分解して示す図である。It is a figure which decomposes | disassembles and shows the structure of the insertion part front-end | tip part of the endoscope apparatus of FIG. 図１の内視鏡装置の駆動部材とアクチュエータとの連結部分の構成を示す図である。It is a figure which shows the structure of the connection part of the drive member and actuator of the endoscope apparatus of FIG. 図１の内視鏡装置の第一保持部材と第二保持部材との接合部分の構成を示す図である。It is a figure which shows the structure of the junction part of the 1st holding member of the endoscope apparatus of FIG. 1, and a 2nd holding member. 本発明の実施形態を説明するための、内視鏡装置の挿入部先端部の他の例の構成を示す図である。It is a figure which shows the structure of the other example of the insertion part front-end | tip part of an endoscope apparatus for describing embodiment of this invention. 図５の内視鏡装置の第一保持部材と第二保持部材との接合部分の構成を示す図である。It is a figure which shows the structure of the junction part of the 1st holding member of the endoscope apparatus of FIG. 5, and a 2nd holding member.

図１及び図２は、本発明の実施形態を説明するための、内視鏡装置の挿入部先端部の一例の構成を示す。   1 and 2 show an example of the configuration of the distal end portion of an insertion portion of an endoscope apparatus for explaining an embodiment of the present invention.

内視鏡装置１は、ＣＣＤ（Charge Coupled Device）型やＣＭＯＳ（Complementaly Metal Oxide Semiconductor）型の撮像素子１０と、撮像素子１０の受光面に被写体像を結像させる撮像光学系１１と、アクチュエータ１２と、駆動部材１３と、第一保持部材１４と、第二保持部材１５と、を備える。   The endoscope apparatus 1 includes a CCD (Charge Coupled Device) type or CMOS (Complementaly Metal Oxide Semiconductor) type imaging element 10, an imaging optical system 11 that forms a subject image on a light receiving surface of the imaging element 10, and an actuator 12. A drive member 13, a first holding member 14, and a second holding member 15.

撮像光学系１１は、この撮像光学系１１の光軸Ａ１の延在方向（光軸方向）に移動可能な少なくとも一つの可動レンズを含み、図示の例では二つの可動レンズ２０ａ，２０ｂが設けられている。そして、撮像光学系１１は、光軸Ａ１に沿って可動レンズ２０ａ，２０ｂの被写体側に配置された対物レンズ２１と、像側に配置された固定レンズ２２及びプリズム２３とを含んで構成されている。   The imaging optical system 11 includes at least one movable lens that can move in the extending direction (optical axis direction) of the optical axis A1 of the imaging optical system 11, and in the illustrated example, two movable lenses 20a and 20b are provided. ing. The imaging optical system 11 includes an objective lens 21 disposed on the subject side of the movable lenses 20a and 20b along the optical axis A1, and a fixed lens 22 and a prism 23 disposed on the image side. Yes.

可動レンズ２０ａは可動レンズ枠３０ａに保持され、可動レンズ２０ｂは可動レンズ枠３０ｂに保持されており、いずれも第二保持部材１５の鏡胴部３１に収容されている。可動レンズ枠３０ａ，３０ｂの各々は、鏡胴部３１内において光軸方向に移動可能とされている。   The movable lens 20a is held by the movable lens frame 30a, and the movable lens 20b is held by the movable lens frame 30b, both of which are housed in the lens barrel 31 of the second holding member 15. Each of the movable lens frames 30 a and 30 b is movable in the optical axis direction within the lens barrel 31.

対物レンズ２１は鏡胴部３１の被写体側端部に挿入される対物レンズ枠３２に保持され、固定レンズ２２は鏡胴部３１の像側端部に挿入される固定レンズ枠３３に保持されており、いずれも光軸Ａ１上における位置が固定されている。また、プリズム２３は、鏡胴部３１の像側端部に装着されるハウジング３４に保持されており、光軸Ａ１上における位置が固定されている。   The objective lens 21 is held by an objective lens frame 32 inserted into the subject side end of the lens barrel 31, and the fixed lens 22 is held by a fixed lens frame 33 inserted at the image side end of the lens barrel 31. In both cases, the position on the optical axis A1 is fixed. The prism 23 is held by a housing 34 attached to the image side end of the lens barrel 31, and its position on the optical axis A1 is fixed.

対物レンズ２１に入射した光束は、光軸Ａ１に沿って進み、プリズム２３において略９０度曲げられてプリズム２３から出射される。撮像素子１０は、プリズム２３の出射面に対向して光軸Ａ１から外れた位置に配置され、ハウジング３４に保持されており、プリズム２３から出射された光束を受光する。なお、プリズム２３を省略して光軸Ａ１上に撮像素子１０を配置する構成とすることもできる。   The light beam incident on the objective lens 21 travels along the optical axis A <b> 1, is bent by approximately 90 degrees at the prism 23, and is emitted from the prism 23. The image sensor 10 is disposed at a position opposite to the emission surface of the prism 23 and deviated from the optical axis A1, is held by the housing 34, and receives the light beam emitted from the prism 23. Note that the prism 23 may be omitted and the image sensor 10 may be disposed on the optical axis A1.

駆動部材１３は、アクチュエータ１２の駆動力を可動レンズ２０ａ，２０ｂに伝達し、可動レンズ２０ａ，２０ｂを光軸方向に前後移動させるものであって、図示の例では、アクチュエータ１２は回転モータとされ、駆動部材１３はカム軸とされている。   The driving member 13 transmits the driving force of the actuator 12 to the movable lenses 20a and 20b, and moves the movable lenses 20a and 20b back and forth in the optical axis direction. In the illustrated example, the actuator 12 is a rotary motor. The drive member 13 is a cam shaft.

駆動部材１３は、光軸Ａ１と平行な回転軸Ａ２上に配置され、第二保持部材１５の鏡胴部３１に併設された筒部３５に回転可能に収容されている。駆動部材１３の外周面には、可動レンズ２０ａを光軸方向に前後移動させるためのカム溝４０ａ、及び可動レンズ２０ｂを光軸方向に前後移動させるためのカム溝４０ｂが形成されている。   The drive member 13 is disposed on a rotation axis A2 parallel to the optical axis A1, and is rotatably accommodated in a cylindrical portion 35 provided alongside the lens barrel portion 31 of the second holding member 15. A cam groove 40 a for moving the movable lens 20 a back and forth in the optical axis direction and a cam groove 40 b for moving the movable lens 20 b back and forth in the optical axis direction are formed on the outer peripheral surface of the drive member 13.

アクチュエータ１２は、筒状に形成された第一保持部材１４に収容されて保持されている。アクチュエータ１２の出力軸４１を覆う第一保持部材１４の先端部側の内周面には段差面１６が設けられており、アクチュエータ１２は、その先端面１７の縁部を段差面１６に当接させて位置決めされ、第一保持部材１４に接着固定されている。また、アクチュエータ１２の基端部に設けられた結線部１８を覆う第一保持部材１４の基端部には接着剤が充填されており、それにより結線部１８が保護されている。   The actuator 12 is accommodated and held in a first holding member 14 formed in a cylindrical shape. A stepped surface 16 is provided on the inner peripheral surface of the first holding member 14 covering the output shaft 41 of the actuator 12 on the distal end side. The actuator 12 abuts the edge of the distal end surface 17 on the stepped surface 16. The first holding member 14 is bonded and fixed. In addition, the base end portion of the first holding member 14 that covers the connection portion 18 provided at the base end portion of the actuator 12 is filled with an adhesive, thereby protecting the connection portion 18.

そして、第一保持部材１４は第二保持部材１５に接合されている。第二保持部材１５に接合された第一保持部材１４に保持されているアクチュエータ１２の出力軸４１は、回転軸Ａ２上に配置されて駆動部材１３と同軸とされ、駆動部材１３の基端部４２に連結されている。   The first holding member 14 is joined to the second holding member 15. The output shaft 41 of the actuator 12 held by the first holding member 14 joined to the second holding member 15 is disposed on the rotation axis A <b> 2 and is coaxial with the driving member 13. 42.

第二保持部材１５の鏡胴部３１と筒部３５とは連通しており、鏡胴部３１に収容されている可動レンズ枠３０ａ，３０ｂは、筒部３５に収容されている駆動部材１３にそれぞれ係合している。   The lens barrel portion 31 and the tube portion 35 of the second holding member 15 communicate with each other, and the movable lens frames 30 a and 30 b accommodated in the lens barrel portion 31 are connected to the drive member 13 accommodated in the tube portion 35. Each is engaged.

駆動部材１３に係合する可動レンズ枠３０ａの係合部３６ａ、及び駆動部材１３に係合する可動レンズ枠３０ｂの係合部３６ｂは、いずれも筒状に形成されており、筒状に形成された係合部３６ａ，３６ｂには駆動部材１３がそれぞれ挿通されている。それにより、可動レンズ枠３０ａ，３０ｂは、駆動部材１３に沿って移動可能に、つまりは駆動部材１３が位置する回転軸Ａ２と平行な光軸Ａ１の延在方向に移動可能に支持される。   The engaging portion 36a of the movable lens frame 30a that engages with the driving member 13 and the engaging portion 36b of the movable lens frame 30b that engages with the driving member 13 are both formed in a cylindrical shape, and are formed in a cylindrical shape. The drive member 13 is inserted through the engaged portions 36a and 36b. Accordingly, the movable lens frames 30a and 30b are supported so as to be movable along the drive member 13, that is, movable in the extending direction of the optical axis A1 parallel to the rotation axis A2 where the drive member 13 is located.

そして、係合部３６ａには駆動部材１３のカム溝４０ａに係合するカムピン４３ａが、また係合部３６ｂには駆動部材１３のカム溝４０ｂに係合するカムピン４３ｂがそれぞれ設けられている。   The engaging portion 36a is provided with a cam pin 43a that engages with the cam groove 40a of the driving member 13, and the engaging portion 36b is provided with a cam pin 43b that engages with the cam groove 40b of the driving member 13.

アクチュエータ１２の出力軸４１に連結された駆動部材１３は、アクチュエータ１２によって回転される。駆動部材１３の回転に伴い、カム溝４０ａにカムピン４３ａを係合させている可動レンズ枠３０ａ、及びカム溝４０ｂにカムピン４３ｂを係合させている可動レンズ枠３０ｂは、光軸方向にそれぞれ前後移動される。それより、可動レンズ２０ａ，２０ｂが光軸方向にそれぞれ前後移動され、変倍やフォーカシングが行われる。   The drive member 13 connected to the output shaft 41 of the actuator 12 is rotated by the actuator 12. As the drive member 13 rotates, the movable lens frame 30a having the cam pin 43a engaged with the cam groove 40a and the movable lens frame 30b having the cam pin 43b engaged with the cam groove 40b are respectively moved back and forth in the optical axis direction. Moved. As a result, the movable lenses 20a and 20b are moved back and forth in the optical axis direction to perform zooming and focusing.

以上のように構成された内視鏡装置１において、アクチュエータ１２を保持する第一保持部材１４と、可動レンズ２０ａ，２０ｂ及び駆動部材１３を保持する第二保持部材１５とは分離可能に互いに接着されている。そして、アクチュエータ１２と駆動部材１３もまた分離可能に互いに連結されている。   In the endoscope apparatus 1 configured as described above, the first holding member 14 that holds the actuator 12 and the second holding member 15 that holds the movable lenses 20a and 20b and the driving member 13 are separably bonded to each other. Has been. The actuator 12 and the drive member 13 are also detachably connected to each other.

図３は、アクチュエータ１２と駆動部材１３との連結部分の構成を示す。   FIG. 3 shows a configuration of a connecting portion between the actuator 12 and the drive member 13.

アクチュエータ１２の出力軸４１と、出力軸４１と同軸に配置された駆動部材１３の基端部４２とは、連結部材４３を介して連結されている。   The output shaft 41 of the actuator 12 and the base end portion 42 of the drive member 13 arranged coaxially with the output shaft 41 are connected via a connecting member 43.

連結部材４３は、出力軸４１に固定され、図示の例では、出力軸４１に外嵌する略円環状の固定部４４と、固定部４４から径方向に突出した突部４５とを有している。そして、駆動部材１３の基端部４２には、連結部材４３が内嵌する凹部４６が形成されている。連結部材４３が凹部４６に嵌合することによって、アクチュエータ１２の出力軸４１と駆動部材１３の基端部４２とは、回転伝達可能に且つ分離可能に互いに連結される。なお、連結部材４３は、図示の形状に限られるものではなく、全体として出力軸４１に垂直な断面において非円形状に形成されていればよい。   The connecting member 43 is fixed to the output shaft 41. In the example shown in the figure, the connecting member 43 includes a substantially annular fixing portion 44 that is fitted on the output shaft 41, and a protrusion 45 that protrudes in the radial direction from the fixing portion 44. Yes. A recess 46 into which the connecting member 43 is fitted is formed in the base end portion 42 of the drive member 13. When the connecting member 43 is fitted into the recess 46, the output shaft 41 of the actuator 12 and the base end portion 42 of the driving member 13 are connected to each other so as to be able to transmit rotation and to be separated. The connecting member 43 is not limited to the shape shown in the drawing, and may be formed in a noncircular shape in a cross section perpendicular to the output shaft 41 as a whole.

図４は、第一保持部材１４と第二保持部材１５との接合部分の構成を示す。   FIG. 4 shows a configuration of a joint portion between the first holding member 14 and the second holding member 15.

アクチュエータ１２を保持する第一保持部材１４において、アクチュエータ１２の出力軸４１を覆う端部は、第二保持部材１５と接合される接合部３７とされている。また可動レンズ２０ａ，２０ｂ及び駆動部材１３を保持する第二保持部材１５において、出力軸４１が連結される駆動部材１３の基端部４２を覆う端部は、第一保持部材１４と接合される接合部３８とされている。   In the first holding member 14 that holds the actuator 12, an end portion that covers the output shaft 41 of the actuator 12 is a joining portion 37 that is joined to the second holding member 15. Further, in the second holding member 15 that holds the movable lenses 20 a and 20 b and the driving member 13, the end portion that covers the base end portion 42 of the driving member 13 to which the output shaft 41 is coupled is joined to the first holding member 14. The joint portion 38 is used.

接合部３７，３８は、いずれも筒状に形成されており、互いに嵌合可能とされている。なお、図示の例では、第一保持部材１４の接合部３７が第二保持部材１５の接合部３８に外嵌する構成とされているが、第二保持部材１５の接合部３８が第一保持部材１４の接合部３７に外嵌する構成とすることもできる。   The joint portions 37 and 38 are both formed in a cylindrical shape and can be fitted to each other. In the illustrated example, the joint portion 37 of the first holding member 14 is configured to be fitted around the joint portion 38 of the second holding member 15, but the joint portion 38 of the second holding member 15 is the first holding member. It can also be set as the structure fitted to the junction part 37 of the member 14. FIG.

そして、嵌合した接合部３７，３８が分離可能に互いに接着される。接合部３７，３８の嵌合に加えて接合部３７，３８を接着することにより、接合部３７，３８の間の接合強度を高めることができ、アクチュエータ１２の反力を受けとめるに足る接合強度を接合部３７，３８の間に確保することができる。   And the joined joint parts 37 and 38 are mutually adhere | attached so that isolation | separation is possible. By bonding the joint portions 37 and 38 in addition to the fitting of the joint portions 37 and 38, the joint strength between the joint portions 37 and 38 can be increased, and the joint strength sufficient to receive the reaction force of the actuator 12 can be obtained. It can be secured between the joint portions 37 and 38.

そして、例えば可動レンズ２０ａ，２０ｂの移動機構や可動レンズ２０ａ，２０ｂを含む撮像光学系１１に不具合が生じた場合などには、接合部３７，３８を接着している接着剤ＡＤを除去し、アクチュエータ１２を保持している第一保持部材１４を、可動レンズ２０ａ，２０ｂ及び駆動部材１３を保持している第二保持部材１５から分離することにより、アクチュエータ１２の再利用が可能となる。   For example, when a malfunction occurs in the imaging optical system 11 including the moving mechanism of the movable lenses 20a and 20b and the movable lenses 20a and 20b, the adhesive AD that bonds the joint portions 37 and 38 is removed. By separating the first holding member 14 holding the actuator 12 from the second holding member 15 holding the movable lenses 20a and 20b and the driving member 13, the actuator 12 can be reused.

接合部３７，３８を接着する接着剤ＡＤの除去を容易とする観点から、第一保持部材１４の接合部３７が第二保持部材１５の接合部３８に外嵌する図示の例において、接着剤ＡＤは、外側の接合部３７の先端に沿って塗布されている。外側の接合部３７の先端に沿って塗布された接着剤ＡＤは、接合部３７，３８の接着後も露呈し、例えば接合部３７の内周面と接合部３８の外周面との間に塗布されている場合に比較して容易に除去可能である。   From the viewpoint of facilitating removal of the adhesive AD adhering the joints 37 and 38, the adhesive in the illustrated example in which the joint 37 of the first holding member 14 is fitted around the joint 38 of the second holding member 15. AD is applied along the tip of the outer joint 37. The adhesive AD applied along the tip of the outer joint portion 37 is exposed even after the joint portions 37 and 38 are bonded. For example, the adhesive AD is applied between the inner peripheral surface of the joint portion 37 and the outer peripheral surface of the joint portion 38. It can be easily removed compared to the case where it is used.

接着剤ＡＤは、例えば溶剤や熱や光といった外部刺激によって解体可能な接着剤が好適に用いられる。上記のように、外側の接合部３７の先端に沿って塗布されることによって接合部３７，３８の接着後も露呈している接着剤ＡＤに対して、外部刺激を容易に付与することができ、接着剤ＡＤを容易に解体除去することができる。   As the adhesive AD, for example, an adhesive that can be disassembled by an external stimulus such as a solvent, heat, or light is preferably used. As described above, external stimulation can be easily applied to the adhesive AD that is exposed even after the bonding of the bonding portions 37 and 38 by being applied along the tip of the outer bonding portion 37. The adhesive AD can be easily disassembled and removed.

さらに、接着剤ＡＤによる接合部３７，３８の接合強度を高める観点から、内側の接合部３８の後端部に、外側の接合部３７の先端面３９ａと嵌合方向に対向する段差面３９ｂが設けられており、外側の接合部３７の先端面３９ａと内側の接合部３８の段差面３９ｂとが接着剤ＡＤによって接着されている。一般に、接着では接着層の厚みが大きくなる程に欠陥や内部応力の増加に起因して接合強度が低下する傾向にあるところ、上記構成によれば、対向する先端面３９ａと段差面３９ｂとの間で接着層の厚みを十分に小さくすることができ、接合部３７，３８の接合強度を高めることができる。   Further, from the viewpoint of increasing the bonding strength of the bonding portions 37, 38 by the adhesive AD, a step surface 39b facing the front end surface 39a of the outer bonding portion 37 in the fitting direction is formed at the rear end portion of the inner bonding portion 38. The front end surface 39a of the outer joint portion 37 and the step surface 39b of the inner joint portion 38 are bonded by an adhesive AD. Generally, in bonding, as the thickness of the adhesive layer increases, the bonding strength tends to decrease due to an increase in defects and internal stress. According to the above configuration, the tip surface 39a and the step surface 39b are opposed to each other. The thickness of the adhesive layer can be sufficiently reduced, and the bonding strength of the bonding portions 37 and 38 can be increased.

また、内側の接合部３８の後端部に段差面３９ｂを設けることにより、この段差面３９ｂと外側の接合部３７の先端面３９ａとを当接させてアクチュエータ１２を駆動部材１３に対して位置決めし、アクチュエータ１２の出力軸４１と駆動部材１３の基端部４２とを適切に連結させることが可能となる。   Further, by providing a step surface 39 b at the rear end portion of the inner joint portion 38, the step surface 39 b is brought into contact with the tip surface 39 a of the outer joint portion 37 to position the actuator 12 with respect to the drive member 13. Thus, the output shaft 41 of the actuator 12 and the base end portion 42 of the drive member 13 can be appropriately connected.

なお、上述した例では、第二保持部材１５に別途装着されるハウジング３４に撮像素子１０が保持されるものとして説明したが、例えばプリズム２３が省略されて撮像素子１０が光軸Ａ１上に配置される場合などにおいて、第二保持部材１５が撮像素子１０を保持する構成とすることもでき、その場合には、撮像素子１０に不具合が生じた場合にも、第一保持部材１４を第二保持部材１５から分離することによってアクチュエータ１２の再利用が可能となる。   In the above-described example, the imaging device 10 is described as being held by the housing 34 that is separately attached to the second holding member 15. However, for example, the prism 23 is omitted and the imaging device 10 is disposed on the optical axis A1. In such a case, the second holding member 15 may be configured to hold the image sensor 10, and in this case, the first holding member 14 may be set to the second even when a malfunction occurs in the image sensor 10. By separating from the holding member 15, the actuator 12 can be reused.

図５は、本発明の実施形態を説明するための、内視鏡装置の挿入部先端部の他の例の構成を示す。なお、上述した内視鏡装置１と共通する要素には、共通の符号を付することにより説明を省略し又は簡略する。   FIG. 5 shows a configuration of another example of the distal end portion of the insertion portion of the endoscope apparatus for explaining the embodiment of the present invention. In addition, description is abbreviate | omitted or simplified by attaching | subjecting a common code | symbol to the element which is common in the endoscope apparatus 1 mentioned above.

図５に示す例では、第一保持部材１４の接合部３７及び第二保持部材１５の接合部３８は、いずれも円筒状に形成されており、互いに嵌合可能とされている。そして、内側の接合部３８の外周面には突起５０が設けられており、外側の接合部３７には突起５０を受容する切り欠き５１が設けられている。図示の例では、突起５０及び切り欠き５１はそれぞれ一つとされているが、接合部３７及び接合部３８の周方向に間隔をあけて複数設けられていてもよい。   In the example shown in FIG. 5, the joint portion 37 of the first holding member 14 and the joint portion 38 of the second holding member 15 are both formed in a cylindrical shape and can be fitted to each other. A protrusion 50 is provided on the outer peripheral surface of the inner joint portion 38, and a notch 51 for receiving the protrusion 50 is provided on the outer joint portion 37. In the illustrated example, one protrusion 50 and one notch 51 are provided, but a plurality of protrusions 50 and a plurality of notches 51 may be provided at intervals in the circumferential direction of the joint portion 37 and the joint portion 38.

切り欠き５１は、接合部３７の先端面３９ａから接合部３７の後端側に向けて軸方向に延在する案内部５２と、案内部５２から接合部３７の周方向に延在する係止部５３とを有している。接合部３７，３８の嵌合に伴い、突起５０は案内部５２を通して切り欠き５１に受容される。そして、接合部３７，３８の相対回転に伴い、突起５０は切り欠き５１内の係止部５３に配置される。   The notch 51 includes a guide portion 52 that extends in the axial direction from the front end surface 39 a of the joint portion 37 toward the rear end side of the joint portion 37, and a latch that extends from the guide portion 52 in the circumferential direction of the joint portion 37. Part 53. As the joint portions 37 and 38 are fitted, the protrusion 50 is received in the notch 51 through the guide portion 52. Then, with the relative rotation of the joint portions 37 and 38, the protrusion 50 is disposed on the locking portion 53 in the notch 51.

突起５０が係止部５３に配置された状態で、接合部３７，３８は分離可能に互いに接着される。接合部３７，３８の嵌合に加えて接合部３７，３８を接着することにより、接合部３７，３８の間の接合強度を高められる。   In a state where the protrusion 50 is disposed on the locking portion 53, the joint portions 37 and 38 are detachably bonded to each other. By bonding the joint portions 37 and 38 in addition to the fitting of the joint portions 37 and 38, the joint strength between the joint portions 37 and 38 can be increased.

そして、接合部３７，３８が接着されることにより、接合部３７，３８の相対回転が阻止され、突起５０が係止部５３に保持される。係止部５３に保持された突起５０は、周方向に延在する係止部５３によって、周方向と交差する方向である接合部３７，３８の嵌合方向への移動を阻止され、接合部３７，３８は互いに抜け止めされる。それにより、接合部３７，３８の間の接合強度をより高められる。   Then, by bonding the joint portions 37 and 38, relative rotation of the joint portions 37 and 38 is prevented, and the protrusion 50 is held by the locking portion 53. The protrusion 50 held by the locking portion 53 is prevented from moving in the fitting direction of the joint portions 37 and 38 that intersect the circumferential direction by the locking portion 53 extending in the circumferential direction. 37 and 38 are prevented from coming off from each other. Thereby, the joint strength between the joint portions 37 and 38 can be further increased.

接合部３７、３８の接着箇所は、例えば、上述した内視鏡装置１と同様に接合部３７の先端面３９ａと接合部３８の段差面３９ｂとすることができる。また、本例においては、接合部３７の切り欠き５１の側面と切り欠き５１に露呈する接合部３８の外周面及び突起５０とを接着するようにしてもよく、特に、切り欠き５１を接着剤で充填することが好ましい。切り欠き５１を接着剤で充填することにより、切り欠き５１内での突起５０の移動をより確実に阻止し、接合部３７，３８の間の接合強度をさらに高められる。切り欠き５１に充填された接着剤は、接合部３７，３８の接着後も露呈し、比較的容易に除去可能である。   The bonding locations of the bonding portions 37 and 38 can be, for example, the tip surface 39a of the bonding portion 37 and the stepped surface 39b of the bonding portion 38 as in the endoscope device 1 described above. Further, in this example, the side surface of the notch 51 of the joint portion 37 and the outer peripheral surface of the joint portion 38 exposed to the notch 51 and the protrusion 50 may be bonded. In particular, the notch 51 is bonded to the adhesive. It is preferable to fill with. By filling the notch 51 with the adhesive, the movement of the protrusion 50 in the notch 51 can be more reliably prevented, and the joining strength between the joining portions 37 and 38 can be further increased. The adhesive filled in the notch 51 is exposed even after the bonding portions 37 and 38 are bonded, and can be removed relatively easily.

図６は、図５の内視鏡装置の挿入部先端部の変形例の構成を示す。   FIG. 6 shows a configuration of a modified example of the distal end portion of the insertion portion of the endoscope apparatus of FIG.

図６に示す例では、係止部５３に接合部３７の先端側から後端側に向けて傾斜した傾斜面５４が設けられている。接合部３７と接合部３８との相対回転に伴い、突起５０は係止部５３に配置されるが、その際、突起５０が傾斜面５４を摺動する。それにより、接合部３７は接合部３８との嵌合方向に付勢され、接合部３７の先端面３９ａが接合部３８の段差面３９ｂに押し当てられる。   In the example shown in FIG. 6, the locking portion 53 is provided with an inclined surface 54 that is inclined from the front end side to the rear end side of the joint portion 37. With the relative rotation between the joint portion 37 and the joint portion 38, the protrusion 50 is disposed on the locking portion 53. At this time, the protrusion 50 slides on the inclined surface 54. Accordingly, the joint portion 37 is urged in the fitting direction with the joint portion 38, and the tip end surface 39 a of the joint portion 37 is pressed against the step surface 39 b of the joint portion 38.

先端面３９ａが段差面３９ｂに押し当てられることにより、突起５０と傾斜面５４との間や先端面３９ａと段差面３９ｂとの間に、接合部３７，３８の相対回転を阻止する摩擦力が生じる。それにより、接合部３７，３８の間の接合強度をさらに高められる。   When the tip surface 39a is pressed against the step surface 39b, a frictional force that prevents the relative rotation of the joint portions 37 and 38 between the protrusion 50 and the inclined surface 54 or between the tip surface 39a and the step surface 39b is generated. Arise. Thereby, the joint strength between the joint portions 37 and 38 can be further increased.

接合部３７、３８の接着箇所は、例えば、接合部３７の先端面３９ａと接合部３８の段差面３９ｂであってもよいし、接合部３７の切り欠き５１の側面と切り欠き５１に露呈する接合部３８の外周面及び突起５０であってもよい。なお、接合部３７，３８の嵌合、及び突起５０と傾斜面５４との間や先端面３９ａと段差面３９ｂとの間に生じる摩擦力によって、接合部３７，３８の間の接合に十分な強度が得られる場合には、接合部３７，３８の接着を省いてもよい。   The bonding locations of the joint portions 37 and 38 may be, for example, the front end surface 39 a of the joint portion 37 and the stepped surface 39 b of the joint portion 38, or exposed to the side surface of the notch 51 and the notch 51 of the joint portion 37. The outer peripheral surface of the joining portion 38 and the protrusion 50 may be used. In addition, it is sufficient for the joining between the joining parts 37 and 38 by the frictional force generated between the fitting of the joining parts 37 and 38 and between the protrusion 50 and the inclined surface 54 or between the tip surface 39a and the stepped surface 39b. When strength is obtained, the bonding of the joint portions 37 and 38 may be omitted.

以上、説明したとおり、本明細書には下記事項が開示されている。   As described above, the following items are disclosed in this specification.

（１） 撮像素子と、光軸方向に移動可能な少なくとも一つの可動レンズを含む撮像光学系と、アクチュエータと、上記アクチュエータの駆動力を上記可動レンズに伝達してこの可動レンズを移動させる駆動部材と、上記アクチュエータを保持する第一保持部材と、上記可動レンズ及び上記駆動部材を保持する第二保持部材と、を備え、上記第一保持部材及び上記第二保持部材は、互いに接合される接合部をそれぞれ有しており、上記アクチュエータと上記駆動部材とは分離可能に連結され、上記第一保持部材の上記接合部と上記第二保持部材の上記接合部とは、分離可能に互いに接着されている内視鏡装置。
（２） 上記第一保持部材の上記接合部及び上記第二保持部材の上記接合部は、互いに嵌合可能な筒状にそれぞれ形成されており、互いに嵌合した状態において外側の接合部の先端に沿って接着されている上記（１）の内視鏡装置。
（３） 上記第一保持部材の上記接合部及び上記第二保持部材の上記接合部のうち、互いに嵌合した状態において内側の接合部の後端部には、上記外側の接合部の先端面と嵌合方向に対向する段差面が設けられており、上記外側の接合部の先端面と上記内側の接合部の段差面とが接着されている上記（２）の内視鏡装置。
（４） 上記外側の接合部の先端面と上記内側の接合部の段差面とが当接することにより、上記アクチュエータは、上記駆動部材に対して位置決めされ、この駆動部材と連結される上記（３）の内視鏡装置。
（５） 上記第一保持部材の上記接合部及び上記第二保持部材の上記接合部は、互いに嵌合可能な円筒状にそれぞれ形成されており、互いに嵌合した状態において内側の接合部の外周面に少なくとも一つの突起が設けられ、外側の接合部に上記突起を受容する切り欠きが設けられており、上記切り欠きは、周方向に延在し、上記外側の接合部と上記内側の接合部との相対回転に伴って上記突起を係止する係止部を有する上記（１）から（４）のいずれか一つの内視鏡装置。
（６） 上記内側の接合部の後端部には、外側の接合部の先端面と嵌合方向に対向する段差面が設けられており、上記係止部には、上記外側の接合部の先端側から後端側に向けて傾斜した傾斜面が設けられており、上記外側の接合部と上記内側の接合部との相対回転に伴い、上記突起が上記傾斜面を摺動して上記外側の接合部の上記先端面が上記内側の接合部の上記段差面に押し当てられる上記（５）の内視鏡装置。
（７） 上記アクチュエータは回転モータであり、上記駆動部材は上記アクチュエータの出力軸と同軸に配置されたカム軸である上記（１）から（６）のいずれか一つの内視鏡装置。
（８） 上記アクチュエータの上記出力軸は、この出力軸に固定された連結部材を介して上記駆動部材と連結されており、上記連結部材は、上記出力軸に垂直な断面において非円形状に形成されており、上記駆動部材には上記連結部材が嵌合する凹部が形成されている上記（７）の内視鏡装置。
（９） 上記第二保持部材は、上記撮像素子をさらに保持する上記（１）から（８）のいずれか一つの内視鏡装置。 (1) An imaging element, an imaging optical system including at least one movable lens movable in the optical axis direction, an actuator, and a driving member that transmits the driving force of the actuator to the movable lens to move the movable lens And a first holding member that holds the actuator, and a second holding member that holds the movable lens and the driving member, and the first holding member and the second holding member are joined to each other. The actuator and the drive member are separably connected, and the joint portion of the first holding member and the joint portion of the second holding member are separably bonded to each other. Endoscope device.
(2) The joint portion of the first holding member and the joint portion of the second holding member are each formed in a cylindrical shape that can be fitted to each other, and in the state of being fitted to each other, the tip of the outer joint portion The endoscope apparatus according to (1), wherein the endoscope apparatus is adhered along the endoscope.
(3) Of the joint portion of the first holding member and the joint portion of the second holding member, the rear end portion of the inner joint portion in a state of being fitted to each other has a front end surface of the outer joint portion. The endoscope apparatus according to (2), wherein a step surface facing the fitting direction is provided, and a tip surface of the outer joint portion and a step surface of the inner joint portion are bonded to each other.
(4) When the front end surface of the outer joint and the stepped surface of the inner joint contact each other, the actuator is positioned with respect to the drive member and connected to the drive member (3 ) Endoscopic device.
(5) The joint portion of the first holding member and the joint portion of the second holding member are respectively formed in a cylindrical shape that can be fitted to each other, and the outer periphery of the inner joint portion in a state of being fitted to each other At least one protrusion is provided on the surface, and a notch for receiving the protrusion is provided on the outer joint, and the notch extends in the circumferential direction, and the outer joint and the inner joint The endoscope apparatus according to any one of (1) to (4), further including a locking portion that locks the protrusion with relative rotation with the portion.
(6) The rear end portion of the inner joint portion is provided with a step surface facing the front end surface of the outer joint portion in the fitting direction, and the locking portion includes the outer joint portion. An inclined surface inclined from the front end side toward the rear end side is provided, and the protrusion slides on the inclined surface with the relative rotation between the outer joint portion and the inner joint portion. The endoscope apparatus according to (5), wherein the tip surface of the joint portion is pressed against the stepped surface of the inner joint portion.
(7) The endoscope apparatus according to any one of (1) to (6), wherein the actuator is a rotary motor, and the driving member is a cam shaft disposed coaxially with an output shaft of the actuator.
(8) The output shaft of the actuator is connected to the drive member via a connecting member fixed to the output shaft, and the connecting member is formed in a noncircular shape in a cross section perpendicular to the output shaft. The endoscope device according to (7), wherein the driving member is formed with a recess into which the connecting member is fitted.
(9) The endoscope apparatus according to any one of (1) to (8), wherein the second holding member further holds the imaging element.

１ 内視鏡装置
１０ 撮像素子
１１ 撮像光学系
１２ アクチュエータ
１３ 駆動部材
１４ 第一保持部材
１５ 第二保持部材
２０ａ，２０ｂ 可動レンズ
３７，３８ 接合部
３９ａ 先端面
３９ｂ 段差面
４１ 出力軸
４３ 連結部材
４６ 凹部
Ａ１ 光軸
Ａ２ 回転軸
ＡＤ 接着剤 DESCRIPTION OF SYMBOLS 1 Endoscope apparatus 10 Image pick-up element 11 Imaging optical system 12 Actuator 13 Drive member 14 1st holding member 15 2nd holding member 20a, 20b Movable lens 37, 38 Joint part 39a Tip surface 39b Step surface 41 Output shaft 43 Connecting member 46 Concave part A1 Optical axis A2 Rotating axis AD Adhesive

Claims (8)

撮像素子と、
光軸方向に移動可能な少なくとも一つの可動レンズを含む撮像光学系と、
アクチュエータと、
前記アクチュエータの駆動力を前記可動レンズに伝達して該可動レンズを移動させる駆動部材と、
前記アクチュエータを保持する第一保持部材と、
前記可動レンズ及び前記駆動部材を保持する第二保持部材と、
を備え、
前記第一保持部材及び前記第二保持部材は、互いに接合される接合部をそれぞれ有しており、
前記アクチュエータと前記駆動部材とは分離可能に連結され、
前記第一保持部材の前記接合部と前記第二保持部材の前記接合部とは、分離可能に互いに接着されており、
前記第一保持部材の前記接合部及び前記第二保持部材の前記接合部は、互いに嵌合可能な筒状にそれぞれ形成されており、互いに嵌合した状態において外側の接合部の先端に沿って接着されている内視鏡装置。 An image sensor;
An imaging optical system including at least one movable lens movable in the optical axis direction;
An actuator,
A driving member that transmits the driving force of the actuator to the movable lens to move the movable lens;
A first holding member for holding the actuator;
A second holding member for holding the movable lens and the driving member;
With
The first holding member and the second holding member each have a joint portion to be joined to each other,
The actuator and the drive member are detachably connected,
The joint portion of the first holding member and the joint portion of the second holding member are bonded to each other so as to be separable ,
The joint portion of the first holding member and the joint portion of the second holding member are respectively formed in a cylindrical shape that can be fitted to each other, and along the tip of the outer joint portion in a state of being fitted to each other. An endoscopic device that is bonded . 前記第一保持部材の前記接合部及び前記第二保持部材の前記接合部のうち、互いに嵌合した状態において内側の接合部の後端部には、外側の接合部の先端面と嵌合方向に対向する段差面が設けられており、
前記外側の接合部の先端面と前記内側の接合部の段差面とが接着されている請求項１記載の内視鏡装置。 Out of the joint portion of the first holding member and the joint portion of the second holding member, the rear end portion of the inner joint portion is fitted to the front end surface of the outer joint portion and the fitting direction. Is provided with a stepped surface facing
The endoscope apparatus according to claim 1 , wherein a front end surface of the outer joint portion and a step surface of the inner joint portion are bonded. 前記外側の接合部の先端面と前記内側の接合部の段差面とが当接することにより、前記アクチュエータは、前記駆動部材に対して位置決めされ、該駆動部材と連結される請求項２記載の内視鏡装置。 The inner surface according to claim 2 , wherein the actuator is positioned with respect to the drive member and connected to the drive member by abutting a tip surface of the outer joint portion with a step surface of the inner joint portion. Endoscopic device. 前記第一保持部材の前記接合部及び前記第二保持部材の前記接合部は、互いに嵌合可能な円筒状にそれぞれ形成されており、互いに嵌合した状態において内側の接合部の外周面に少なくとも一つの突起が設けられ、外側の接合部に前記突起を受容する切り欠きが設けられており、
前記切り欠きは、周方向に延在し、前記外側の接合部と前記内側の接合部との相対回転に伴って前記突起を係止する係止部を有する請求項１から３のいずれか一項記載の内視鏡装置。 The joint portion of the first holding member and the joint portion of the second holding member are respectively formed in a cylindrical shape that can be fitted to each other, and at least on the outer peripheral surface of the inner joint portion in a state of being fitted to each other. One protrusion is provided, and a notch for receiving the protrusion is provided in the outer joint portion,
The notch extends in the circumferential direction, any one of claims 1-3 having a locking portion for locking the projection in accordance with the relative rotation between the said inner joint part and outer joint part The endoscope apparatus according to item. 前記内側の接合部の後端部には、外側の接合部の先端面と嵌合方向に対向する段差面が設けられており、
前記係止部には、前記外側の接合部の先端側から後端側に向けて傾斜した傾斜面が設けられており、
前記外側の接合部と前記内側の接合部との相対回転に伴い、前記突起が前記傾斜面を摺動して前記外側の接合部の前記先端面が前記内側の接合部の前記段差面に押し当てられる請求項４記載の内視鏡装置。 The rear end portion of the inner joint portion is provided with a step surface facing the front end surface of the outer joint portion in the fitting direction,
The locking portion is provided with an inclined surface inclined from the front end side to the rear end side of the outer joint portion,
With the relative rotation between the outer joint and the inner joint, the protrusion slides on the inclined surface, and the tip surface of the outer joint pushes against the step surface of the inner joint. The endoscope apparatus according to claim 4, which is applied. 前記アクチュエータは回転モータであり、
前記駆動部材は前記アクチュエータの出力軸と同軸に配置されたカム軸である請求項１から５のいずれか一項記載の内視鏡装置。 The actuator is a rotary motor;
The endoscope apparatus according to any one of claims 1 to 5 , wherein the driving member is a cam shaft disposed coaxially with an output shaft of the actuator. 前記アクチュエータの前記出力軸は、該出力軸に固定された連結部材を介して前記駆動部材と連結されており、
前記連結部材は、前記出力軸に垂直な断面において非円形状に形成されており、
前記駆動部材には前記連結部材が嵌合する凹部が形成されている請求項６記載の内視鏡装置。 The output shaft of the actuator is connected to the driving member via a connecting member fixed to the output shaft,
The connecting member is formed in a non-circular shape in a cross section perpendicular to the output shaft,
The endoscope apparatus according to claim 6, wherein the driving member is formed with a recess into which the connecting member is fitted. 前記第二保持部材は前記撮像素子をさらに保持する請求項１から７のいずれか一項記載の内視鏡装置。 The endoscope apparatus according to claim 1, wherein the second holding member further holds the image sensor.
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