JP2018205371A - Eyepiece section structure of surgical microscope - Google Patents

Abstract

To provide an eyepiece section structure of a surgical microscope in which: an astigmatism correction lens can be easily replaced depending on an observer; and the astigmatism correction lens can be made to be in a proper direction when it is replaced.SOLUTION: A terminal part 5 built in an astigmatism correction lens 9 is detachable/attachable, by a bayonet system, from/to a body part 4 built in a diopter adjustment lens 8, thus the astigmatism correction lens 9 is easily replaced. Also, when it is attached, the astigmatism correction lens 9 is necessarily directed in a proper direction, thus an astigmatism correcting function is not impaired.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an eyepiece structure of a surgical microscope.

  The surgical microscope includes a pair of left and right eyepieces for observing the surgical part in three dimensions. An inner cylindrical eye cup is slidably inserted into the eyepiece along the optical axis direction of the eyepiece. A diopter adjustment lens is provided inside the eye cup to adjust the diopter according to the individual eyesight of the observer. By changing the slide position of the eye cup, the diopter can be adjusted to suit the observer. It can be adjusted.

  Recently, there has been a request to add a personalized astigmatism correction lens to the eyepiece in addition to the diopter adjustment lens so that the observer (doctor) can remove the glasses and perform surgery. Proposed eyepieces have been proposed (see, for example, Patent Document 1).

JP 2010-49111 A

  However, the diopter adjustment lens built in the eyepiece can adjust the diopter for any observer's pupil just by changing the slide position, but the characteristics of the astigmatism correction lens are different for each individual. One astigmatism correcting lens can only be used by the individual observer. Moreover, the astigmatism correcting lens has directivity in the rotational direction, and if used in the wrong direction, the function as an astigmatism correcting lens is impaired.

  For this reason, even with an eyepiece unit to which an astigmatism correction lens is added, the astigmatism correction lens must be replaced every time the observer changes, and the replacement work is difficult. In addition, when the lens is replaced, the astigmatism correcting lens must be in the correct orientation, which further increases the difficulty of the replacement operation.

  The present invention has been made by paying attention to such a conventional technique, and it is possible to easily replace the astigmatism correcting lens according to the observer and to perform the operation so that the astigmatism correcting lens can be oriented in the correct direction. It aims at providing the eyepiece part structure of a microscope.

  According to the first technical aspect of the present invention, a cylindrical eye cup is inserted into the pair of left and right eyepieces provided in the surgical microscope from the observer side of the eyepiece. An eyepiece structure of a surgical microscope, wherein the eyecup is slidably inserted in the optical axis direction while maintaining non-rotation in the rotation direction around the optical axis of the eyepiece and is inserted therein. It comprises a main body provided with a diopter adjustment lens and a terminal part detachably attached to the observer side of the main body part and provided with an astigmatism correction lens inside, and the terminal part is attached to the main body part It is sometimes characterized in that it is in a normal orientation in the direction of rotation about the optical axis of the eyepiece.

  According to the second technical aspect of the present invention, the terminal portion is detachably attached to the main body portion by a bayonet method, and the corresponding surface of either the main body portion or the terminal portion is centered on the optical axis. A plurality of flange-shaped bayonet claws each having a different shape along the rotation direction are formed, and the other corresponding surface has a notch that can be inserted along the optical axis direction in a shape corresponding to each bayonet claw. The bayonet groove is formed from each notch to only one of the rotation directions around the optical axis, and the bayonet claw extends from the notch to the end of the bayonet groove. By rotating, the terminal part is attached to the main body part, and the terminal part is in a normal orientation.

  According to the first technical aspect of the present invention, the astigmatism correcting lens is provided in the terminal portion, and the terminal portion can be detachably attached to the main body portion, so that the observer has a built-in astigmatism correcting lens for personal use. Each of the terminal portions may be prepared, and the terminal portions may be attached to the main body portion when using the surgical microscope. Due to the detachable mounting structure, it is easy to mount an individual terminal unit to the main body. When attached, the astigmatism correcting lens in the terminal portion is always in the correct orientation, and the function of the astigmatism correcting lens is not impaired.

  According to the second technical aspect of the present invention, since the bayonet claws have different shapes, the bayonet claws are always correctly inserted into the corresponding notches. The bayonet claw rotates along the bayonet groove formed from the cutout portion only in one of the locking directions, and the rotation stops at the end portion. Therefore, the terminal portion is regulated in a normal direction, and the built-in astigmatism correcting lens functions correctly. When removing the terminal part, the terminal part is rotated in the reverse direction, the bayonet claw is aligned with the cutout part, and then extracted from there.

The perspective view which shows a surgical microscope. Sectional drawing which shows an eyepiece part. Sectional drawing of the eyepiece part which shows the state which removed the terminal part. The perspective view which shows each corresponding surface of a main-body part and a terminal part. Explanatory drawing which shows the terminal part and main-body part of a detachment position. Explanatory drawing which shows the terminal part and main-body part of a latching position. Sectional drawing which shows the internal shape of a bayonet groove | channel. Sectional drawing which shows the bayonet groove | channel and the bayonet nail | claw of a detachment | leave position. Sectional drawing which shows the bayonet groove | channel and the bayonet groove | channel of a latching position.

  1 to 9 are views showing a preferred embodiment of the present invention.

  The surgical microscope 1 has two eyepieces 2 on the left and right. Each eyepiece 2 has a cylindrical shape, and an eye cup 3 is slidably inserted along the optical axis K of the eyepiece 2 on the observer M side. The eye cup 3 is also basically cylindrical and includes a main body portion 4 inserted into the eyepiece 2 and a terminal portion 5 attached to the observer M side of the main body portion 4.

  A straight groove 6 is formed on the inner surface of the eyepiece 2 along the direction of the optical axis K, and a pin 7 that moves along the straight groove 6 is fixed to the outer surface of the main body 4. Accordingly, the main body 4 is slidable along the direction of the optical axis K, but is not rotated in the rotational direction around the optical axis K due to the engagement of the straight groove 6 and the pin 7.

  A diopter adjustment lens 8 is built in the main body 4. The observer M can adjust the diopter to the pupil of the observer M by adjusting the slide by moving the main body 4 in the direction of the optical axis K.

  The terminal unit 5 includes an astigmatism correcting lens 9. The astigmatism correcting lens 9 is incorporated in a holder 10, and the holder 10 is screwed to the terminal portion 5. A rubber 11 is provided on the periphery of the terminal unit 5 on the observer M side. The rubber 11 improves the feel when the observer M's eyes are applied, and also has a function of shielding the area around the eyes of the observer M.

  The terminal unit 5 is detachably attached to the main body unit 4 by a bayonet method. Two bayonet claws 12 and 13 are formed in the facing direction on the corresponding surface of the terminal portion 5 with respect to the main body portion 4. The bayonet claws 12 and 13 have different shapes, and the lower bayonet claw 13 is formed larger than the upper bayonet claw 12.

  On the corresponding surface of the main body 4, notches 14 and 15 having shapes corresponding to the bayonet claws 12 and 13 are formed at positions corresponding to the bayonet claws 12 and 13. An arc range in which the notches 14 and 15 can be rotated at an angle θ of 45 degrees from the notches 14 and 15 toward only one locking direction A of the rotation directions around the optical axis K. Are formed with bayonet grooves 16 and 17 (in the drawing, the symbol θ of the lower bayonet groove 17 is omitted).

  A marker 18 is attached to a position displaced by 45 degrees from the bayonet claw 12 on the corresponding surface of the terminal unit 5 in the detaching direction B. The marker 18 is referred to when the astigmatism correcting lens 9 is incorporated in the terminal unit 5. The astigmatism correcting lens 9 is in a normal direction when the marker 18 faces directly above. The astigmatism correcting lens 9 is incorporated in the terminal portion 5 in advance so that the marker 18 faces directly above when the 5 is attached.

  Next, a method for attaching / detaching the terminal unit 5 to / from the main body unit 4 will be described.

  In the following description, the position rotated by an angle θ in the locking direction A from the notches 14 and 15 of the bayonet grooves 16 and 17 is the locking position a, and the positions of the notches 14 and 15 in the main body 4 are the disengagement positions. This will be described as b.

  First, in order to attach the terminal portion 5 to the main body portion 4, the terminal portion 5 is held by hand and the bayonet claws 12 and 13 are inserted into the notch portions 14 and 15 as they are aligned with the notch portions 14 and 15 of the main body portion 4. At this time, since the upper and lower shapes of the bayonet claws 12 and 13 and the notches 14 and 15 are different from each other, there is no fear that the upper and lower sides are mistaken.

  After the bayonet claws 12 and 13 are inserted into the notches 14 and 15, the end portion 5 is turned in the locking direction A by an angle θ, and the bayonet claws 12 and 13 are in contact with the ends of the bayonet grooves 16 and 17. Set to stop position a. In this state, the bayonet claws 12 and 13 are engaged with the bayonet grooves 16 and 17, and the bayonet claws 12 and 13 are held at the locking position “a” by an appropriate frictional force generated between them. However, the state of the terminal unit 5 is maintained as it is.

  When the bayonet claws 12 and 13 are turned to the locking position a, the marker 18 of the terminal portion 5 is directed right above, and the astigmatism correcting lens 9 in the terminal portion 5 is in a normal direction. Since the terminal unit 5 is not rotated around the optical axis K, the terminal unit 5 is also not rotated.

  Therefore, the directivity of the astigmatism correcting lens 9 once set in the normal direction is maintained even if the whole eyecup 3 is slid in the direction of the optical axis K, and the function of preventing astigmatism can be sufficiently exhibited. The observer M can perform the operation with the glasses removed, and can increase the efficiency of the operation.

  When removing this terminal part 5, the terminal part 5 is turned to the removal direction B, and the bayonet claws 12 and 13 are matched with the notch parts 14 and 15 which are the separation positions b. The bayonet claws 12 and 13 can be extracted from the cutout portions 14 and 15 as they are, and the terminal portion 5 can be removed from the main body portion 4. When another observer M uses the surgical microscope 1, another terminal unit incorporating a dedicated astigmatism correcting lens that matches the observer M may be attached in the same manner as described above.

DESCRIPTION OF SYMBOLS 1 Surgical microscope 2 Eyepiece part 3 Eye cup 4 Main body part 5 Terminal part 8 Diopter adjustment lens 9 Astigmatism correction lens 12, 13 Bayonet claw 14, 15 Notch part 16, 17 Bayonet groove A Locking direction B Removal direction K Optical axis M Observer a Locking position b Release position

Claims (2)

An eyepiece structure of a surgical microscope in which a cylindrical eye cup is inserted from the observer side of the eyepiece inside the pair of left and right eyepieces provided in the surgical microscope,
The eye cup is inserted into the eyepiece slidably in the optical axis direction while maintaining non-rotation in the rotation direction around the optical axis of the eyepiece, and a diopter adjustment lens is provided inside. A terminal unit that is detachably attached to the observer side of the main body unit and is provided with an astigmatism correction lens inside,
An eyepiece structure of a surgical microscope, wherein the terminal portion is in a normal orientation in a rotation direction around the optical axis of the eyepiece when attached to the main body. The terminal part is detachably attached to the main body part by the bayonet method,
A plurality of flange-shaped bayonet claws each having a different shape along the rotation direction around the optical axis are formed on the corresponding surface of either the main body portion or the terminal portion,
The other corresponding surface is formed with a cutout portion having a shape corresponding to each bayonet claw and capable of inserting the bayonet claw along the optical axis direction, and rotating from the cutout portion around the optical axis. A bayonet groove is formed only in one of the locking directions,
2. The surgical microscope according to claim 1, wherein the bayonet claw rotates from the notch portion to the end of the bayonet groove so that the terminal portion is attached to the main body portion and the terminal portion is in a normal orientation. Eye structure.

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