WO2015050102A1 - Endoscope - Google Patents

Endoscope Download PDF

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Publication number
WO2015050102A1
WO2015050102A1 PCT/JP2014/076022 JP2014076022W WO2015050102A1 WO 2015050102 A1 WO2015050102 A1 WO 2015050102A1 JP 2014076022 W JP2014076022 W JP 2014076022W WO 2015050102 A1 WO2015050102 A1 WO 2015050102A1
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WO
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Application
Patent type
Prior art keywords
portion
insertion portion
tube
member
proximal
Prior art date
Application number
PCT/JP2014/076022
Other languages
French (fr)
Japanese (ja)
Inventor
宮城 邦彦
澤井 貴司
Original Assignee
株式会社Jimro
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00112Connection or coupling means
    • A61B1/00121Connectors, fasteners and adapters, e.g. on the endoscope handle
    • A61B1/00126Connectors, fasteners and adapters, e.g. on the endoscope handle optical, e.g. for light supply cables
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064Constructional details of the endoscope body
    • A61B1/00066Proximal part of endoscope body, e.g. handles
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064Constructional details of the endoscope body
    • A61B1/00105Constructional details of the endoscope body characterised by modular construction
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B23/00Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2476Non-optical details, e.g. housings, mountings, supports
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements

Abstract

Provided is an endoscope which uses a simple and inexpensive configuration which makes it possible that a hand-held section and an insertion section can be connected and disconnected from each other while sealing properties are ensured, thereby making the insertion section suitable to be disposed of. An elastic connection member (50) is provided between the hand-held section (10) and insertion section (20) of an endoscope (2). The connection member (50) straddles and covers the front end of the hand-held section (10) and the base end of the insertion section (20), is in close elastic contact with the hand-held section (10), and is integrally joined to the insertion section (20). Thus, the hand-held section (10) and the insertion section (20) are separably connected to each other.

Description

Endoscope

The present invention relates to an endoscope, an endoscope structure particularly suitable for disposable design.

In general, the endoscope of this kind, the insertion portion extends from the proximal portion. Inside the insertion portion, an illumination optical system and an optical fiber or the like for transmitting the illumination light from the light source, an optical system such as a relay lens or an optical fiber to transmit is provided to image light (see Patent Documents 1 and 2) . The endoscope of Patent Document 2, the tip portion including an insertion portion is separable from the proximal section including the imaging unit.

JP 2005-237436 JP International Publication No. WO2009 / 078070

In this type of endoscope, rather than re-use by washing at every use, there is a demand for the disposable. However, it is uneconomical to the entire endoscope disposable. Therefore, as in Patent Document 2, separately and an insertion portion proximal part, it is conceivable to replace by only inserting portion disposable. However, Patent Document 2 does not describe a means of ensuring the sealing property between the insertion portion proximal portion, there is a risk that liquid from the seam may enter. On the other hand, when providing a seal member such as an O-ring, the number of components increases, or processing the accommodating portion of the sealing member, labor of Dari fitting the seal member into the housing portion also required, correspondingly high cost. The higher the cost, it is not suitable for disposable.
In view of the above circumstances, by simple and inexpensive construction, while ensuring the sealing performance is detachable and an insertion portion proximal part, provides an endoscope suitable for insertion section to disposable Specifications and an object thereof.

To solve the above problems, the present invention includes a hand portion, an endoscopic having an insertion portion extending along an axis from the proximal portion, the insertion portion and the proximal portion is in a separate member from each other is constituted by a separable, further, with comprises a tubular connecting member having elasticity, wherein the connecting member is, covers to span a proximal end of the insertion portion and the distal portion of the proximal portion, the proximal portion and elastically close contact with the peripheral surface of the one member of the insertion portion, and by being bonded together with other member of the proximal portion and the insertion portion, the insertion portion and said connecting and said proximal portion characterized in that it is connected detachably by a member.
According to this construction, by separating the insertion portion proximal part, it can be or or replace the insertion portion disposable. Moreover, the connection from member itself can be to perform the functions of the sealing member, the sealing member such as an O-ring is not needed, not only the number of parts can be reduced, it is not necessary to form the housing portion of the seal member, configure the can be simplified. Thus, an inexpensive, can provide an endoscope which is suitable for disposable design.

Objective element is provided at the distal end portion of the insertion portion, it is preferable that the imaging element is provided on the proximal part. Furthermore, the endoscope is preferably provided with adjusting means for variably adjusting the relative position along the axis of said connecting member and said one member of the proximal portion and the insertion portion. Thus, for example, a new insertion unit when connecting to the proximal part, can be finely adjusted for a distance between the objective element and the imaging element to the focal length.

Said adjusting means comprises a pinion provided on the connecting member, and a rack meshing with the pinion with provided on the one member of the proximal portion and the insertion portion, the meshing released by elastic deformation of said connecting member possible it is preferred that. Thus, the adjustment means can be a simple structure. For serving also as a function of connecting member releases the engagement of the separately necessary to provide a mesh release mechanism no.

The hand portion is an outer casing, and a said outer movably accommodated in the holding portion along the axis inside the casing, said imaging element is held in the holding portion, the insertion portion and while said outer casing is positionally fixed via the connection member, and the insertion portion and the holding portion are preferably adjusted relative position along said axis by said adjusting means.
Thus, while not displaced from each other and the outer casing and the connecting member, the holding portion (hence the imaging device) can be adjusted located a direction along an objective element in the axial (axial direction), and connected to the outer housing member the sealing between the can be reliably ensured.

The insertion portion includes an outer tube extending along an axis, and the inner tube is provided which is accommodated in the outer tube, between the inner tube and the outer tube transmits the illumination light from the light source gas, liquid, illumination light transmitting medium consisting of either a light-transmissive resin is accommodated in the interior of the inner tube, the gas for transmitting the image light of an observation target, a liquid, either translucent resin image light transmission medium made of been accommodated, the objective element is provided, the relative position adjustable and be detachably connected along the proximal end of the inner tube is the holding portion and the shaft line to the tip of the inner tube It is preferred.
This allows the configuration of the insertion portion inexpensive and more simple, can provide a more suitable endoscope disposable specifications.

Said light source is provided on the proximal part, in the interior of the connecting member, the conical recess of conical shape whose diameter decreases toward the insertion portion is formed, the inner tube through said conical recess, wherein between the outer peripheral surface of the inner circumferential surface of the conical recess and the inner tube, glass for guiding the illumination light between the outer tube and the inner tube, translucent resin, or conical annular light guide composed of gas it is preferred that parts are provided.
When separating the insertion portion proximal part, it can be easily separated illumination means between the light source and the light guide portion.

According to the present invention, by simple and inexpensive construction, while ensuring the sealing performance can be detachable and an insertion portion proximal part, provides an endoscope suitable for disposable specification the insertion portion it can.

1 (a) is a rigid endoscope according to the first embodiment of the present invention, is a longitudinal sectional view showing a state where the insertion portion and the hand portion are connected. Figure 1 (b) is a longitudinal sectional view showing a state where the hard endoscope, the insertion portion and the hand portion are separated. 1 taken along the II-II of (a), a sectional view is omitted the internal structure of the rigid endoscope. It is a longitudinal sectional view showing an enlarged part of the rigid endoscope. It is a perspective view of a light guide member of the rigid endoscope. It is a configuration diagram of an endoscope apparatus including the hard endoscope. 6 (a) is a rigid endoscope according to a second embodiment of the present invention, is a side view showing a state where the insertion portion and the hand portion are connected. 6 (b) is a side view showing a state where a rigid endoscope according to the second embodiment, the insertion portion and the hand portion are separated.

Hereinafter, an embodiment of the present invention with reference to the drawings.
As shown in FIG. 5, the endoscope apparatus 1 includes a rigid endoscope 2, a camera control unit (CCU) 3, and a monitor 4. The rigid endoscope 2 is, for example, an endoscope for ophthalmology, but the present invention is limited thereto. As shown in FIG. 1 (a), the rigid endoscope 2 includes a proximal portion 10, an insertion portion 20, an illumination unit 30, and a viewing means 40. The tip of the proximal portion 10 are continuous insertion portion 20 (left in Figure 1 (a)). Internal illumination means 30 and the observation means 40 of the proximal portion 10 and the insertion portion 20 is provided. Hand portion 10 is held by the operator, the insertion portion 20 is inserted into the observation target such as a human orbital and lacrimal gland. Observation target tip near the insertion portion 20 is illuminated by the illumination means 30. By the observation unit 40 image light of the observation target is captured in the endoscope 2, via the image processing by CCU 3, it is displayed on the monitor 4.

Further detailing the structure of the endoscope 2.
As shown in FIG. 1 (a) and FIG. (B), the proximal portion 10 and the insertion portion 20, and is separable (detachable) are constituted by separate members from each other. Hand portion 10 includes an outer housing 11, an inner housing 12, the sleeve 13 includes a shaft tube 14, which is a multiple cylinder shape extending along the axis L. As shown in FIG. 2, the cross-sectional shape of the proximal part 10 has a deformed elliptical shape similar to oval. As shown in FIG. 1 (a), is Uchikatami 12 to outer casing 11 is housed are housed in the axial tube 14 through the sleeve 13 into the interior of the inner casing 12 further. Sleeve 13 and shaft tube 14 is adapted to be slidable in the axial direction (direction along the axis L) relative to the outer housing 11 and the inner 筺 12 in unison with each other. Alternatively, the inner 筺 12 and the sleeve 13 and the shaft tube 14 may be designed to be axially slidable relative to the outer housing 11 in unison with each other.

As shown in FIG. 1, the insertion portion 20 extends straight along the tip of the proximal part 10 in the axis L. As shown in FIG. 3, the insertion portion 20 includes an outer tube 21, includes an inner tube 22, has a double circular tube. The material of the outer tube 21 is preferably a metal having elasticity, such as stainless, carbon steel, iron, aluminum or the like. Outer tube 21 and hence the insertion portion 20 is ultrafine. Outer diameter of the outer tube 21 is less than or equal to the number mm (2mm ~ 3mm), preferably at 1mm or less, for example, about 0.9 mm, the present invention is not limited thereto.

The inner tube 22 has a smaller diameter than the outer tube 21, and is housed inside the outer tube 21 so as to form a an outer tube 21 coaxially. The material of the inner tube 22 is preferably a metal having elasticity, such as stainless, carbon steel, iron, aluminum. As shown in FIG. 1 (b), the base end portion of the inner tube 22 (right end portion in this figure) protrudes toward the proximal portion 10 than the outer tube 21. Connection pipe 23 is provided at the proximal end of the inner tube 22.

As shown in FIG. 3, the connecting pipe 23, and a small-diameter tube portion 23a (left in FIG. 3) the distal end side, and a central tapered portion 23b, the tube portion of the large diameter of the base end side (right in FIG. 3) and a 23c integrally. Tube portion 23a by being fitted to the outer periphery of the base end portion of the inner tube 22, connecting tube 23 is integrally connected to the inner tube 22. Tapered portion 23b is integrally connected to the proximal end of the tube portion 23a. The tapered portion 23b is enlarged toward the proximal direction. Pipe portion 23c is integrally connected to the enlarged end portion of the tapered portion 23b. The tube portion 23c, the shaft tube 14 of the proximal part 10 is fitted to allow and detachable slide axially. Thus, the proximal end of the inner tube 22, along the shaft tube 14 and the axis L via the connecting pipe 23 so as to be relatively adjustable position and detachably coupled.

As shown in FIG. 1 (a) and FIG. (B), the connection member 50 is provided between the proximal portion 10 and the insertion portion 20. Connecting member 50 is composed of a rubber (elastic material), and has elasticity. As shown in FIG. 1 (b) and FIG. 2, the connecting member 50 includes a cover tube portion 51, and a cap portion 52 integrally. Covering tube portion 51 is formed a cylindrical axis along allowed tubular the axis L, the cross-sectional shape thereof is adapted to deform elliptical shape substantially similar to the proximal portion 10. Proximal end of the covering tube portion 51 (right end in FIG. 1 (b)) is opened. Tip portions of the cover tube portion 51 (left end in FIG. 1 (b)) is closed by the cap portion 52.

As shown in FIG. 1 (b), the cap portion 52 is adapted to the wall-like cone shape protruding to the (left in to FIG. 1 (b)) the distal direction along the axis L. As shown in FIG. 3, the cap portion 52, and the conical recess 52a, and the insertion hole 52b is formed along the axis L. Conical recess 52a is adapted to a conical shape which is reduced in diameter toward the distal end (left in FIG. 3). The proximal end of the large diameter side of the conical recess 52a, are opened in the inner space of the covering tube portion 51. The small-diameter side of the tip of the conical recess 52a are continuous insertion hole 52b. Insertion hole 52b is a distal end portion and a comparable diameter of the conical recess 52a, reaches the distal end surface of the connecting member 50.

As shown in FIG. 1 (a), connecting member 50, so as to straddle between the tip portion of the proximal portion 10 and the proximal end of the insertion portion 20, overlaying the outer periphery of the proximal portion 10 and the insertion portion 20 there. The elastically in close contact with the outer peripheral surface of the covering tube portion 51 proximal portion 10 (one member), and the cap portion 52 is integrally joined with the insertion portion 20 (the other member). Thus, a proximal portion 10 and the insertion portion 20 is connected detachably by a connection member 50.

It will be described in more detail the connection structure.
Proximal portion of the outer tube 21 is fitted into the insertion hole 52b. In this insertion hole 52 b, and the outer tube 21 and the cap portion 52 are bonded together by an adhesive or the like. Length of projection from the cap portion 52 of the outer tube 21 is, for example, about 30 mm ~ 50 mm, the present invention is not limited thereto. Proximal end of the inner tube 22 extends through the conical recess 52a with protruding from the outer tube 21 along the axis L, it is arranged inside the connection member 50.

The dimensions of the inner peripheral surface of the covering tube portion 51 in the natural state (no load) is slightly smaller than the dimension of the outer peripheral surface of the distal end portion of the outer casing 11. As shown in FIGS. 1 (a) and 2, the covering tube portion 51, that covers the outer periphery of the distal end portion of the outer casing 11, in close contact with the outer housing 11 elastically. A proximal portion 10 and the covering tube portion 51 are connected detachably by the elastic force. Further, between the inner and outer circumferential surfaces of the outer casing 11 of the covering tube portion 51 is sealed liquid-tightly.
In this connected state, the cap portion 52 away from the proximal portion 10 toward the distal end (left In FIG. 1 (a)), and overlying the distal end surface of the proximal part 10.

As shown in FIG. 2, on the outer circumferential surface of the outer casing 11, a plurality are formed guide projections 11f (here, two). These guide projections 11f is extends straight along the axis L, in the circumferential direction are arranged apart from each other. On the other hand, the inner peripheral surface of the covering tube portion 51, the guide groove 51f of the number corresponding to the guide projections 11f (2 two in this case) is formed. These guide grooves 51f is extends straight along the axis L, away from each other in the circumferential direction, are arranged at positions corresponding to the guide projections 11f. Each guide projections 11f have been fitted to be slidable in the corresponding guide grooves 51f along the axis L. Thus, the connection member 50 is prevented from rotating so as not to rotate relative to the circumferential direction of the proximal portion 10.

Furthermore, as shown in FIG. 1, the outer peripheral surface of the outer casing 11, the locking recess 11e is formed in an annular shape along the circumferential direction of the outer casing 11. On the other hand, the base end portion of the covering tube portion 51, locking projections 51e projecting inward in the radial direction is provided annularly in the circumferential direction of the covering tube portion 51. Locking projections 51e is engaged fitted in the locking recess 11e. Thus, it is positioned between the outer housing 11 to the connecting member 50 the axial direction.

Between the connecting member 50 and the proximal portion 10, adjusting means 60 is provided position. Position adjusting means 60 includes a pinion 61 (circular gear), the rack 62 and a (linear gear). Pinion 61 is embedded rotatable connecting member 50. By connecting member 50 is in contact resiliently with the pinion 61, between the connecting member 50 and the pinion 61 is liquid-tightly sealed. Rack 62 is fixed to the sleeve 13 of the proximal part 10. These pinions 61 and the rack 62 are meshed with each other. By turning the pinion 61 can be adjusted with the connecting member 50, the axial relative position between the sleeve 13 and axle tube 14. During the position adjustment, the relative position between connecting member 50 and the outer casing 11 is fixed.
Further, the connecting member 50 that is elastically deformed, it is possible to release the engagement of the pinion 61 and the rack 62.

As shown in FIG. 1 (a), the observation unit 40, the image optical system 41 has an image sensor 42. Image optical system 41 includes an objective lens 43 (objective element), and the image optical transmission tube 44 (image light transmission member), an imaging lens 45 (imaging element). Objective lens 43 is provided on the distal end of the inner tube 22 (i.e. the distal end of the insertion portion 20).

Image light transmission tube 44, the inner tube 22 is constituted by a connecting pipe 23, and axle tube 14 and extends in a straight line along the axis L. As shown in FIG. 3, the interior space of the image light transmission tube 44, which is an image optical transmission line 44d. Peripheral surface of the image light transmission path 44d (inner surface of the tube 22,23,14) constitute a Zokoroga Narumen 44b. Zokoroga Narumen 44b is made long cylindrical shape extending straight along so as to contact with the objective lens 43 and the imaging lens 45 on the axis L. The Zokoroga Narumen 44b, dark film made of a black-based paint or the like (not shown) is coated. Thus, Zokoroga Narumen 44b has become a dark low reflective surface. The dark color, preferably black. Hereinafter, as appropriate, the Zokoroga Narumen 44b referred to as "low-reflecting surface 44b". Low reflective surface 44b is made into a cylindrical shape extending along the axis L. Low reflection surface 44b is smaller than the reflectance absorption of incident light from the inside, preferably is sufficiently small reflectance.

As shown in FIG. 1, an imaging lens 45 is accommodated in the distal end portion of the shaft tube 14 (holding portion) of the image light transmission tube 44. Therefore, the imaging lens 45 is provided on the proximal portion 10. An imaging lens 45 is constituted by a relay lens including a plurality of lenses constituting the one row, and has a sufficiently large focal distance corresponding to the inter-lens distance between the objective lens 43. As shown in FIG. 3, a portion between the objective lens 43 and the imaging lens 45 in the image light transmitting tube 44 has become a hollow 44e, lens or an optical fiber or the like is not provided between the lenses 43 and 45. The inner tube 22 thus tubular low-reflection surface 44b is in communication with the objective lens 43 and the imaging lens 45, air as image light transmission medium into a cavity 44e in the inner tube 22 (low reflective surface 44b) (gas) is accommodated.

As shown in FIG. 1, the proximal end portion of the shaft tube 14, the imaging device 42 is provided. Imaging device 42 is constituted by a CCD or CMOS. Cable 5 is connected to the image sensor 42. As shown in FIG. 5, the cable 5 is connected to the CCU3 it is drawn from the proximal end of the proximal part 10.

As shown in FIG. 1 (a), the illumination means 30 includes a plurality of light sources 31, the illumination optical system 32. Light source 31, LED is constituted by (light emitting diodes), preferably are constituted by the white LED, the present invention is not limited thereto. Light source 31, and the sleeve 13 so as to face the front end direction (left in FIG. 1 (a)), is held in the sleeve 13. Therefore, the light source 31 is disposed offset from the axis L. Optical axis L 31 of the light source 31 is directed obliquely relative to the axis L. A plurality of light sources 31, arranged annularly in the circumferential direction of the sleeve 13 surrounds the outer periphery of the distal end portion of the shaft tube 14 (and thus image light transmission tube 44).
Incidentally, the one annular light source may be provided so as to surround the image light transmission tube 44.

As shown in FIG. 3, the illumination optical system 32 includes an illumination optical transmission tube 34, an exit lens 35 (illumination window), and a light guide member 33 (light guide section). Illumination light transmitting tube 34 is constituted by an outer tube 21 and inner tube 22 of the insertion portion 20. Between and if these tubes 21 and 22, which is hollow 34e extending along the axis L at an annular (cylindrical) cavity 34e of the annular, constitute an illumination optical transmission path 34d in the insertion portion 10 ing. The illumination light transmitting path 34d, the air (gas) is provided as illumination light transmitting medium. Outer circumferential surface of the annular illumination light transmission path 34d (inner surface of the outer tube 21) serves as a reflective outer surface 34a by being processed mirror-. Similarly, the peripheral surface of the inner annular illumination light transmission path 34d (the outer surface of the inner tube 22) constitutes an inner reflecting surface 34b by being processed mirror-. Or polished inner and outer surfaces of the inner tube 22 of the outer tube 21 by or coated with specular film thereto plane (not shown) such as vapor deposition or sputtering, it is possible to make these surfaces to a mirror surface. The material of the mirror film and aluminum and the like, and the present invention is not limited thereto and may be a metal having other gloss silver.

Inner reflecting surface 34b is made into a cylindrical shape extending along the axis L with and without a front and back and low-reflection surface 44b surrounding the low-reflection surface 44b. Outer reflecting surface 34a is made into a cylindrical shape extending along the axis L surrounds the inner reflecting surface 34b forms an inner reflecting surface 34b concentric. The reflecting surface 34a, and 34b What happened between (between the outer tube 21 and inner tube 22), the air (gas) is provided as an illumination light transmission medium. Reflecting surfaces 34a, 34b reflectance for illuminating light is higher than the reflectance with respect to the image light of the low reflective surface 44b, and the reflecting surface 34a, 34b absorption rate for illumination light is absorbed to the image light of the low reflective surface 44b lower than the rate.

As shown in FIG. 3, the exit lens 35 is configured by an annular concave. The exit lens 35 is fitted to the distal end portion of the illumination light transmitting tube 34 (between the ends with each other of the outer tube 21 and inner tube 22). The exit lens 35, the distal end portion of the illumination light transmitting path 34d is closed.
Instead of the lens 35 may be provided an annular flat glass to the tip end of the illumination light transmitting tube 34.

As shown in FIG. 4, the light guide member 33 is a conical ring shape having a central hole 33c. The light guide member 33 is made of transparent glass (illumination light transmitting medium), have translucency. Incidentally, the light guide member 33, instead of the glass, may be configured by a transparent optical resin (illumination light transmission medium).

As shown in FIG. 3, the light guide member 33, the central axis to coincide with the axis L, it is housed in the conical recess 52a. Thus, the light guide member 33 is interposed between the light source 31 and the insertion portion 20. The outer peripheral surface of the light guide member 33, while being reduced in diameter toward the insertion portion 20 (and hence the illumination optical transmission line 34d), in contact with the inner peripheral surface of the conical recess 52a. End of the large diameter side of the light guide member 33 is directed to the light source 31, the small diameter side edge portion of the light guide member 33 is directed to the insertion portion 20. The end face of the small diameter side of the annular light guide member 33, closes the base end portion of the illumination light transmitting path 34d. The center hole portion 33c, a portion of the inner tube 22 and tube portion 23a (in other words, a part of the image light transfer pipe 44) is inserted. The inner peripheral surface of the center hole portion 33c is in contact with the outer peripheral surface of the inner tube 22 and tube portion 23a. Accordingly, the light guide member 33 surrounds the image light transmission tube 44.

The outer peripheral surface of the light guide member 33 is processed mirror-by mirror film (not shown) is coated by vapor deposition or sputtering. Thus, the outer peripheral surface of the light guide member 33 constitute the outer reflecting surface 33a. The outer peripheral surface of the inner tube 22 and tube section 23a or polished, mirror films (not shown) is processed mirror-by or being coated by vapor deposition or sputtering. The inner peripheral surface of the center hole 33c of the light guide member 33, by contact with the mirror-finished peripheral surface of the inner tube 22 and tube portion 23a, constituting an inner reflecting surface 33b of the light guide member 33 . These reflective surfaces 33a, is between and if 33b, and has a illumination light transmission medium made of glass. The material of the mirror film and aluminum and the like, and the present invention is not limited thereto and may be a metal having other gloss silver.

Illustrating a configuration of action of the rigid endoscope 2 as described above.
By the endoscope 2, when observing the observation target such as a human eye socket, the insertion portion 20 is inserted into the observation target and emits illumination light from the light source 31. By arranging the light source 31 to the proximal part 10, can be shortened transmission distance of the illumination light, it is possible to increase the transmission efficiency. Illumination light enters obliquely the inside of the light guide member 33, the reflecting surface 33a, while being reflected by 33b, is condensing (converging) towards the distal end side of the light guide member 33. Reflecting surfaces 33a, 33b to be able to reliably reflect the illumination light by the mirror surface can be suppressed the loss of the illumination light. Also, whenever the illumination light is reflected by the reflecting surface 33a, 33b, the angle between the traveling direction and the axis L of the illumination light is increased. The illuminating light is introduced into the illumination optical transmission path 34d from the tip of the light guide member 33. Then, the reflecting surface 34a, while being reflected by 34b, is propagated to the tip side of the illumination light transmitting path 34d. The reflecting surface 34a, and 34b can be reliably reflected illumination light by a mirror surface. Reflection surface 34a of the illumination light, even with a small incident angle to 34b, can be reliably reflected, it can prevent transmission. Therefore, it is possible to reduce the loss of the illumination light. The illumination light is irradiated to diffuse from the exit lens 35, illuminates the observation target. By increasing the transmission efficiency of the illumination light can illuminate the observation target reliably.
The angle of the optical axis L 31 of the angle and the light source 31 of the tapered outer peripheral surface of the light guide member 33 is appropriately set, can be adjusted emitting angle thus illumination range. In other words, possible to increase the emission angle by the light guide member 33, it is possible to widen the range of illumination.

Image light of the illuminated observation object is incident on the objective lens 43, is propagated to the base end side of the image light transmission path 44d. The inner surface of the image light transfer pipe 44 by the low reflective surface 44b of the black, can suppress the scattering of the image light. Image light is incident on the straight image forming lens 45 from the objective lens 43 and is imaged on the imaging device 42 by the imaging lens 45. The imaging device 42 converts the image light into an electric signal. This signal is sent to the CCU 3, is displayed as an observation image on the monitor 4. By suppressing the scattering of the image light in the image optical transmission tube 44, it is possible to ensure the sharpness of the observation image (contrast). Furthermore, because it reliably prevented illumination light entering the image optical transmission path 44d by the inner tube 22 can be more reliably prevent the observation image becomes unclear.

According to the rigid endoscope 2, an optical lens on the image optical system 41, because there are only two of the objective lens 43 and the imaging lens 45, it is possible to sufficiently suppress the aberration of the total, to correct aberrations or it can be omitted or simplified labor for or reduced. Further, since the image light transmission medium of the illumination light transmission medium, and image light transmission path 44d of the illumination light transmitting path 34d in the insertion portion 20 is composed of air (gas), simple to the internal structure of the insertion portion 20 it can. Therefore, it cheaper the rigid endoscope 2.
Moreover, without worrying about the damage of the optical elements in the insertion portion 20, it can be an insertion portion 20 to the ultrafine. That is, the insertion portion 20, for example, a diameter of 2 mm ~ 3 mm or less, even preferably had the following ultrafine 1 mm, when the insertion portion 20 is bent by some bending load, the internal illumination light transmitting medium and image light transmission medium It will not be damaged. The objective lens 43, because they are provided at the distal end portion of the insertion portion 20, a possibility that an intermediate portion of the insertion portion 20 is damaged be curved little.
Furthermore, if the bending within the elastic deformation region of the outer tube 21 and inner tube 22, the bending when a load is released, the elastic restoring force of the tube 21, the insertion portion 20 is naturally to its original straight condition to return. Thus, can be reliably irradiated to the observation target with illumination light and an image of the observation target can be observed reliably collected.

In endoscope 2 rigid, it can be at every use, disconnect the insertion portion 20 and the connecting member 50 spent from the proximal portion 10, replace the new insertion portion 20 and the connecting member 50.
During decoupling, while the connecting member 50 is elastically deformed to disengage the locking portion 51e from the engaging recess 11e, and upon releasing the meshing of the pinion 61 and the rack 62, the covering tube portion 51 of the connecting member 50 It pulled out from the outer casing 11. Thus, connecting member 50 can easily separate the proximal portion 10 and may separate the proximal portion 10 and hence the insertion portion 20. Since the elastic deformation of the connecting member 50 can be released meshing of the pinion 61 and the rack 62 is not necessary to separately provide a mesh release mechanism.
With to pull the connecting member 50 from the outer housing 11, connection pipe 23 is pulled out from the shaft tube 14. Therefore, the observation unit 40 is separated between the connection pipe 23 and the shaft tube 14. Also, an illumination means 30 can easily be separated between the light source 31 and the light guide member 33.

When mounting the proximal part new insertion portion 20 to 10, as well as fitting the connecting pipe 23 of the new insert section 20 to the shaft tube 14, the outer covering tube portion 51 of the insertion portion 20 and the integral connecting member 50 fitted on the outer periphery of the housing 11. At this time, by inserting the guide projections 11f into the guide groove 51f, the connecting member 50 and hence can position the insertion portion 20 and the proximal portion 10 in the circumferential direction. Further, while the connecting member 50 is elastically deformed, to engage the pinion 61 and the rack 62. Further, by fitting the locking projections 51e on the locking recess 11e, the connecting member 50 and hence it can position the insertion portion 20 and the proximal portion 10 in the axial direction.

Subsequently, by turning the pinion 61 of the positioning means 60, to finely adjust the axial position of the insertion portion 20 and the shaft tube 14. This allows fine adjustment to suit the inter-lens distance between the objective lens 43 and the imaging lens 45 to the focal length. It is also possible to adjust the magnification of an observed image by the position adjusting means 60.

According to the endoscope 2, the connection member 50 by elastically close contact with the outer housing 11, the connecting member 50 itself functions of the sealing member. Thus, without complicating the sealing structure can be the a proximal portion 10 and the insertion portion 20 detachably. Therefore, it is unnecessary to seal member such as an O-ring, not only the number of parts can be reduced, it is not necessary to form the housing portion of the sealing member can be a structure simpler. Furthermore, a simplified also the structure of the position adjustment means 60. Accordingly, the insertion portion 20 and disposable also costs can be reliably avoided that the increase in, can provide an endoscope 2 which is suitable for disposable specification of the insertion portion 20.
Further, by replacing with a new insert portion 20 to each use, it is possible to save labor of cleaning the used of the insertion portion 20.

Next, another embodiment of the present invention. In the following embodiments, the description thereof is omitted are denoted by the same reference numerals in the drawings with respect to structure that overlaps with previously described forms.
FIGS. 6 (a) and FIG. (B) is a diagram showing the endoscope 2A according to a second embodiment of the present invention. The endoscope 2A, between the proximal portion 10 and the insertion portion 20, a cylindrical connecting member 55 made of elastic rubber are provided. Connecting member 55 is so as to straddle between the tip portion of the proximal portion 10 and the proximal end of the insertion portion 20, overlying these proximal portion 10 and the insertion portion 20. Tapered cylindrical distal end portion 56 of the connecting member 55, while being elastically close contact with the peripheral surface of the insertion portion 20 (one member), the cylindrical base end side 57 of the connecting member 55 is, hand part 10 (the other member) are joined together. Thus, a proximal portion 10 and the insertion portion 20 is connected detachably by a connecting member 55. Further, the pinion 61 of the adjustment means 60 is provided in the connecting member 55, the rack 62 is provided at the proximal end of the insertion portion 20.

The present invention is not limited to the above embodiment, it is possible to make various modifications within a range not departing from its gist.
For example, it may constitute an illumination optical transmission medium in the illumination optical transmission path 34d at a transparent optical resin may be constituted by a liquid such as water, or may be constituted by an optical fiber.
May be constituted by a transparent optical resin image light transmission medium in the image light transmission path 44d, it may be constituted by a liquid such as water, or may be constituted by an optical fiber and a relay lens.
The illumination light transmitting medium in the illumination optical transmission path 34d constituted by cylindrical transparent optical resin, and the image light transmission medium constituted by a cylindrical transparent optical resin in image light transmission path 44d, the cylindrical the center hole of the transparent optical resin may be inserted above cylindrical transparent optical resin. In this case, it may be omitted inner tube 22. When omitting the inner tube 22, be a mirror film coated on the inner peripheral surface of the center hole of the cylindrical transparent optical resin, coating the dark film on the outer peripheral surface of the cylindrical transparent optical resin preferable.
By providing the specular layer on the inner peripheral surface of the conical recess 52a, it may be formed outside the reflective surface 33a. Further, by providing the mirror film on the inner peripheral surface of the center hole 33c of the light guide member 33 may be configured inside the reflecting surface 33b.
By omitting the light guide member 33, the inside of the conical recess 52a and a cavity, the air (gas) in the conical recess 52a may be illumination light transmitting medium. In this case, it is preferable to coat the reflective film of the mirror film or the like on the inner peripheral surface of the conical recess 52a.
The present invention is not limited to a rigid endoscope, it is also applicable to flexible endoscopes.
The outer tube 21 or inner tube 22 may be composed of a resin.
Optical axis L 31 of the light source 31 may be parallel with the axis L.

The present invention is applicable to an endoscope, for example.

L axis 2 hard endoscope (endoscope)
10 proximal part 11 the outer housing 14 the shaft tube (holding portion)
20 the insertion portion 21 the outer tube 22 inner tube 31 light source 33 light guide member (light guide section)
43 objective lens (objective element)
45 an imaging lens (imaging element)
50 connecting member 52a conical recess 60 positioning means 61 the pinion 62 Rack

Claims (6)

  1. A hand portion, an endoscopic having an insertion portion extending along an axis from the proximal portion,
    Can be separated consists the insertion portion and the proximal portion is in a separate member from each other,
    Further comprising a tubular connecting member having elasticity, the connecting member, with covers to span a proximal end of the insertion portion and the distal portion of the proximal portion, one member of the proximal portion and the insertion portion by being bonded together with other member, and the said insertion portion and said proximal portion is connected detachably by the connecting member of the elastically close contact with the peripheral surface, and wherein the proximal portion and the insertion portion an endoscope, characterized in that.
  2. Objective element is provided at the distal end portion of the insertion portion, and an imaging element is provided in the hand unit,
    Further, endoscope according to claim 1, characterized in that it comprises adjustment means for varying adjust the relative position along the axis of said connecting member and said one member of the proximal portion and the insertion portion.
  3. Said adjusting means comprises a pinion provided on the connecting member, and a rack meshing with the pinion with provided on the one member of the proximal portion and the insertion portion, the meshing released by elastic deformation of said connecting member possible endoscope according to claim 2, characterized in that a.
  4. The hand portion is an outer casing, and a said outer holder that is movably accommodated along the axis inside the casing, said and imaging element is held in the holding portion,
    The one insertion portion and said outer casing is positionally fixed via the connection member, according to said insertion portion and the holding portion, characterized in that it is adjusted relative position along said axis by said adjusting means the endoscope according to claim 2 or 3.
  5. The insertion portion includes an outer tube extending along an axis, and the inner tube is provided which is accommodated in the outer tube, between the inner tube and the outer tube transmits the illumination light from the light source gas, liquid, illumination light transmitting medium consisting of either a light-transmissive resin is accommodated in the interior of the inner tube, the gas for transmitting the image light of an observation target, a liquid, either translucent resin image light transmission medium made of been accommodated, the objective element is provided, the relative position adjustable and be detachably connected along the proximal end of the inner tube is the holding portion and the shaft line to the tip of the inner tube the endoscope according to claim 4, characterized in.
  6. Said light source is provided on the proximal part, in the interior of the connecting member, the conical recess of conical shape whose diameter decreases toward the insertion portion is formed, the inner tube through said conical recess, wherein between the outer peripheral surface of the inner circumferential surface of the conical recess and the inner tube, glass for guiding the illumination light between the outer tube and the inner tube, translucent resin, or conical annular light guide composed of gas the endoscope according to claim 5, characterized in that the parts are provided.
PCT/JP2014/076022 2013-10-02 2014-09-30 Endoscope WO2015050102A1 (en)

Priority Applications (2)

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JP2013207263 2013-10-02
JP2013-207263 2013-10-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015540495A JP6370301B2 (en) 2013-10-02 2014-09-30 Endoscope

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WO2015050102A1 true true WO2015050102A1 (en) 2015-04-09

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH075376A (en) * 1993-06-17 1995-01-10 Moritetsukusu:Kk Hard image scope
JPH07248454A (en) * 1994-03-11 1995-09-26 Olympus Optical Co Ltd Hard endoscope
JPH08502905A (en) * 1992-09-01 1996-04-02 エドウィン エル アデアー, Sterilizable endoscope with separable disposable tube assembly
JPH10178A (en) * 1996-06-14 1998-01-06 Machida Endscope Co Ltd Adapter for illumination light transmission system of endoscope device
WO1998035607A1 (en) * 1997-02-13 1998-08-20 Matsushita Electric Industrial Co., Ltd. Endoscope, method of manufacturing the same, and inserting member

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2587421Y2 (en) * 1992-04-30 1998-12-16 ホーヤ・ショット株式会社 Intraocular observation instrument
US8118431B2 (en) * 2008-11-06 2012-02-21 Clarity Medical Systems, Inc. Split view adapter for a microscope

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08502905A (en) * 1992-09-01 1996-04-02 エドウィン エル アデアー, Sterilizable endoscope with separable disposable tube assembly
JPH075376A (en) * 1993-06-17 1995-01-10 Moritetsukusu:Kk Hard image scope
JPH07248454A (en) * 1994-03-11 1995-09-26 Olympus Optical Co Ltd Hard endoscope
JPH10178A (en) * 1996-06-14 1998-01-06 Machida Endscope Co Ltd Adapter for illumination light transmission system of endoscope device
WO1998035607A1 (en) * 1997-02-13 1998-08-20 Matsushita Electric Industrial Co., Ltd. Endoscope, method of manufacturing the same, and inserting member

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JPWO2015050102A1 (en) 2017-03-09 application
JP6370301B2 (en) 2018-08-08 grant

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