JP4562434B2 - Side-view extension tube for surgical microscope - Google Patents

Description

  The present invention relates to a side-view extension lens barrel that is detachable from a surgical microscope.

A surgical microscope used in brain surgery or the like is a three-dimensional (substance) microscope that can grasp an affected part three-dimensionally. The lower surface of the surgical microscope is provided with an illumination light irradiation port and an observation light intake. The illumination light is illuminated downward from the illumination light irradiation port, and the observation light reflected from the affected light is reflected from the illumination light irradiation port. Are guided to the two pupils of the doctor via an objective optical system, a zoom optical system, and an eyepiece optical system (see, for example, Patent Document 1).
JP 2001-208979 A

  However, in such a conventional technique, the lower surface of the surgical microscope is directed to the structure in which the affected part is illuminated by the illumination light irradiation port and the observation light inlet formed on the lower surface of the surgical microscope. The affected area can only be observed in the direction of the head (generally downward). Therefore, for example, when observing a cavity affected part, only the bottom surface of the cavity affected part can be observed, and the inner wall of the cavity affected part cannot be observed.

  The present invention has been made paying attention to such a conventional technique, and provides a side-view type extension lens barrel for a surgical microscope capable of observing the inner wall of a cavity-like affected part.

  The invention according to claim 1 is a side-viewing-type extension barrel for a surgical microscope used by being attached to a surgical microscope having an illumination light irradiation port and an observation light inlet on a lower surface portion, and a lower end portion rather than an upper end portion. It has a cylindrical main body with a smaller diameter, and the upper end of the cylindrical main body has an attachment portion that can be attached to the area where the illumination light irradiation port and the observation light intake port are formed on the lower surface of the surgical microscope. The bottom end of the cylindrical main body has a bottomed structure having an observation window and an illumination window on the side surface, and guides two types of observation light for stereoscopic observation from the observation window to the observation light inlet. An observation optical path and an illumination optical path for guiding illumination light from the illumination light irradiation port to the illumination window are formed.

  In the invention according to claim 2, the attachment portion is connected to the upper end portion of the cylindrical main body in a separated state via the hinge portion and the stopper portion, and the attachment portion is released by releasing the stopper portion when necessary. While being attached to the surgical microscope, the other part of the cylindrical main body is rotatable about the hinge part to the outside of the observation range of the surgical microscope.

  The invention described in claim 3 is characterized in that a lens for allowing two systems of observation light to approach is arranged at the upper end of the cylindrical main body.

  The invention described in claim 4 is characterized in that a notch is formed in a portion corresponding to the illumination optical path of the lens.

  According to the first aspect of the invention, the lower end portion of the cylindrical main body is inserted into the inside of the cavity-like affected part, and the illumination light from the surgical microscope can be irradiated laterally with respect to the inner wall from the illumination window at the lower end portion. Since the reflected lateral observation light can be taken from the observation window and guided to the surgical microscope side, the inner wall of the cavity-like affected part can also be reliably observed.

  According to the second aspect of the present invention, while the attachment portion is attached to the surgical microscope, the tubular main body is rotated outwardly from the observation range of the surgical microscope around the hinge portion. The bottom surface can also be observed as usual.

  According to the invention described in claim 3, since the lens that allows the two systems of observation light to approach is arranged at the upper end of the cylindrical main body, the distance is increased from the lower end of the small diameter toward the upper end of the large diameter. However, the two observation light beams thus guided can be reliably taken into the two observation light inlets of the surgical microscope by using a lens to approach the distance.

  According to the fourth aspect of the present invention, the illumination light irradiated from the illumination light irradiation port of the surgical microscope can be introduced into the illumination light path as it is from the notch without being affected by the lens. It becomes easy.

  Hereinafter, the best embodiment of the present invention will be described with reference to FIGS. The surgical microscope 1 is suspended and supported by a balance-type stand device (not shown), and can be stopped in the air at an arbitrary position and posture.

  As shown in FIG. 6, two observation light inlets 2 and one illumination light irradiation port 3 are formed on the lower surface portion of the surgical microscope 1. The observation light intake 2 and the illumination light irradiation port 3 are formed in the inner region of the flange 4. Four protrusions 5 are formed on the outer surface of the flange 4.

  From the illumination light irradiation port 3, illumination light A guided from an external light source can be irradiated downward. Two lines of observation light B can be taken in from the observation light inlet 2 for stereoscopic viewing. The two observation light beams B taken in are guided from the two eyepieces 6 to the two pupils 7 of the doctor through the internal objective optical system and the zoom optical system.

  On the flange 4 of such a surgical microscope 1, a side-view type extension lens barrel 8 detachably attached from below is attached. The side-view-type extension lens barrel 8 has a cylindrical main body 11 whose lower end portion 10 is smaller in diameter than the upper end portion 9.

  An upper end portion 9 of the cylindrical main body 11 has a cylindrical shape, and an upper portion thereof is separated as an attachment portion 12. The attachment part 12 and the upper end part 9 are connected to each other by a hinge part 13 and a stopper part 14 that are at opposite positions. Four bayonet grooves 15 are formed on the inner surface of the attachment portion 12.

  The lower portion from the upper end portion 9 has a rectangular tube shape whose width gradually decreases, and the lower end portion 10 has a bottomed shape. An illumination window 16 and an observation window 17 are formed vertically on the side surface of the lower end portion 10. The observation window 17 is provided with a prism 18 that reflects the observation light B at a right angle, and the illumination window 16 is provided with a prism 19 that reflects the illumination light A obliquely downward.

  A portion below the upper end portion 9 of the cylindrical main body 11 is divided into an illumination optical path 21 and an observation optical path 22 by a partition wall 20, and the prisms 18 and 19 are positioned at the lower ends thereof. Further, a trapezoidal prism 23 for erecting the observation image is also provided in the middle of the observation optical path 22.

  A lens 24 having a central axis aligned with the observation optical path 22 is supported on the upper end portion 9 of the cylindrical main body 11. A notch 25 is formed in a portion of the lens 24 corresponding to the illumination optical path 21. Since the illumination light A from the surgical microscope 1 can be directly introduced into the illumination optical path 21 from the notch 25 without being influenced by the lens 24, the design of the illumination optical path 21 is easy. Above the lens 24, two individual lenses 26 corresponding to the two systems of observation light B are provided.

  The side-view-type extension lens barrel 8 having such a structure is attached by engaging the bayonet groove 15 of the attachment portion 12 with the protrusion 5 of the flange 4. Then, the surgical microscope 1 is moved to insert the small-diameter lower end 10 of the cylindrical main body 11 into the cavity affected part 27. Since the lower end portion 10 has a small diameter, insertion is easy.

  Then, the illumination light A irradiated from the illumination light irradiation port 3 of the surgical microscope 1 is guided into the illumination optical path 21 and reflected by the prism 19 to be irradiated from the illumination window 16 toward the inner wall 27a of the cavity affected part 27.

  The reflected light reflected by the inner wall 27a of the cavity-like affected part 27 becomes two systems of observation light B, is introduced from the observation window 17, is reflected by the prism 18 at the lower end, and travels upward in the observation light path 22. In the observation light path 22, the two observation light beams B are further reflected by the trapezoidal prism 23 to be erected, and reach the lens 24 at the upper end 9 while increasing the distance therebetween.

  In the lens 24, the distance between the two observation lights B that tend to be enlarged is brought close to each other and is surely guided to the two observation light inlets 2 in the flange 4 of the surgical microscope 1. 3D observation is possible.

  Next, when it is desired to observe the bottom surface 27 b of the cavity-like affected part 27, the stopper part 14 is released, and the cylindrical body 11 other than the attachment part 12 is moved outside the observation range of the surgical microscope 1 around the hinge part 13. Rotate. By doing so, the illumination light A irradiated from the illumination light irradiation port 3 of the surgical microscope 1 can be applied to the bottom surface 27b of the cavity-like affected part 27, and the observation light B reflected by the bottom surface 27b is transmitted from the observation light inlet 2 Can be taken in and observed.

  The attachment part 12 may be a structure integrated with the upper end part 9 of the cylindrical main body 11. The usage form of the surgical microscope 1 may be used not only downward but also horizontally. An optical fiber may be used as the illumination optical path 21 in the side-view extension lens barrel 8.

The side view of the partial cross section which shows the state which attached the side view type extension lens-barrel to the lower surface of the surgical microscope which concerns on one Embodiment of this invention. The side view of the partial cross section which shows the state which rotated parts other than the attachment part of the side view type extension lens-barrel. The perspective view which shows a side view type | mold extension lens barrel. Sectional drawing which shows a side view type extension lens-barrel. The top view which shows the state which looked at the upper end part of the side view type extension lens-barrel from the top. The bottom view which shows the state which looked at the flange of the operation microscope from the bottom.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surgical microscope 2 Observation light intake 3 Illumination light irradiation port 4 Flange 8 Side view extension lens barrel 9 Upper end part 10 Lower end part 11 Cylindrical main body 12 Attachment part 13 Hinge part 14 Stopper part 15 Bayonet groove 16 Illumination window 17 Observation window DESCRIPTION OF SYMBOLS 21 Illumination optical path 22 Observation optical path 24 Lens 25 Notch 27 Cavity affected part 27a Inner wall 27b Bottom face A Illumination light B Observation light

Claims (3)

A side-viewing type extension barrel surgical microscope that is used attached to a surgical microscope having an inlet observation light guided to the objective optical system to the lower surface portion incorporating the observation light and the illumination light irradiation port,
It has a cylindrical body with a smaller diameter at the lower end than at the upper end.
The upper end of the tubular body, have a universal attachment unit detachably in the region inlet observation light and the illumination light irradiation port is formed in the lower surface portion of the surgical microscope,
The lower end of the cylindrical body, a bottomed structure having a viewing window and the illumination window on the side surface,
The interior of the tubular body, the illumination guiding an observation light path for guiding the observation light two systems for stereoscopic observation from the observation window to inlet the observation light, the illumination light from the illumination light irradiation port to the illumination window Form an optical path
The attachment part is connected via a hinge part and a stopper part in a state separated from the upper end part of the cylindrical main body,
By releasing the stopper part, the other part of the cylindrical main body is rotatable about the hinge part to the outside of the observation range of the surgical microscope while the attachment part is attached to the surgical microscope. <br/> A side-view extension lens barrel for a surgical microscope. A side-viewing type extension barrel surgical microscope according to claim 1,
The upper end of the tubular body, side-viewing type extension barrel surgical microscope lens for close observation light of two systems is characterized in that it is arranged. A side-view extension lens barrel for a surgical microscope according to claim 2 ,
Side-viewing type extension barrel surgical microscope, characterized in that the notch in a portion corresponding to the illumination light path of the lens is formed.

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