JP2793884B2 - Rigid endoscope - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rigid endoscope in which an adapter for connecting various devices such as a laser device is detachably connected to an endoscope main body.

[Related Art] In recent years, in performing medical treatment in a body cavity, endoscopic treatment has been actively applied in order to reduce invasion to a patient. As an endoscope used for this treatment, a rigid endoscope provided with a channel through which a medical treatment tool such as forceps is inserted, as represented by a laparoscope for observing and performing treatment in the abdominal cavity, is widely used in practice. ing. Transendoscopic laser therapy, in which a laser beam is introduced into the abdominal cavity through the channel of the rigid endoscope, has also attracted attention. In this case, the cock provided at the rear of the channel of the endoscope body is detachable, and this cock is detached from the endoscope body, and a laser coupler (adapter) for connecting the laser device to the endoscope is attached and detached instead. Known types are known. FIG. 7 shows an example of this type of rigid endoscope.

A channel 52 is formed inside the main body 51 of the illustrated rigid endoscope 50 over the entire length in the axial direction. Further, a lid 53 is attached to the base end of the endoscope main body 51, and a coupler connecting portion 54 is attached via the lid 53. This coupler connecting portion 54 has a laser coupler 55 connected to the laser device LS.
Is connected. In this coupler 55, a reflection mirror 57 is provided.
Are arranged. The reflection mirror 57 is connected to a joystick 56 protruding to the rear of the coupler 55. The reflecting surface 57a of the reflecting mirror 57 swings in conjunction with the operation of moving the joystick 56 up, down, left, and right (in the x and y directions in FIG. 7). Therefore, the light is output from the laser device LS, and the channel 5 is reflected by the reflection surface 57a.
The reflection direction of the laser beam LB reflected into the inside 2 can be appropriately adjusted according to the operation of the joystick 56.

And the mirror reflection surface by the operation of this joystick 56
By appropriately adjusting the reflection direction of the reflected laser beam LB from 57a, a desired affected part in the abdominal cavity is irradiated via the channel 52.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional rigid endoscope, during use of the laser device LS, an incorrect operation of the joystick 56 causes the reflection direction of the laser beam LB from the reflection surface 57a to be deviated from the normal reflection direction. There are cases. Due to this, the laser beam LB may be irradiated to a part other than the irradiation target part, so that the part other than the treatment target is cauterized, or the laser beam LB interferes with the inner wall of the channel 52. The light may not be emitted from the endoscope main body 51.

In order to eliminate such inconvenience, it is desirable to eliminate the adjustment using the joystick 56 when using the laser device LS and prevent erroneous operation. In this case, it is necessary to accurately determine the mounting position of the laser coupler 55 with respect to the main body 51. However, since the laser coupler 55 is attached to the main body 51 via several parts such as the lid 53 and the coupler connecting part 54, there is a possibility that the processing accuracy and the assembly accuracy of these parts are affected. . For this reason, the mounting position of the coupler connecting portion 53 cannot be determined accurately, and the laser coupler
There is a risk that the optical axis of 55 and the axis of channel 52 will be misaligned. Therefore, when the joystick 56 is abolished,
A disadvantage arises in that the laser beam LB cannot be guided to a desired position.

The present invention has been made in view of the above problems,
An object of the present invention is to provide a rigid endoscope capable of accurately positioning an attachment position of an adapter to an endoscope main body.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides an adapter having an endoscope main body having a channel through which a medical treatment tool or the like can be inserted and having a communication passage communicating with the channel. In a rigid endoscope provided with an adapter attaching / detaching means for detachably connecting the adapter, a position adjusting means capable of adjusting an attachment position of the adapter so that an axis of the channel and an axis of the communication path substantially coincide with each other. It is provided on the adapter attaching / detaching means.

[Operation] According to the structure of the present invention described above, by adjusting the mounting position of the adapter with respect to the endoscope main body by the position adjusting means, the axis of the channel of the endoscope main body and the axis of the communication passage of the adapter are adjusted. Can be matched exactly. That is, the alignment between the adapter and the channel can be adjusted without using an optical axis adjusting means such as a conventional joystick.

Embodiment FIG. 1 to FIG. 3 show a rigid endoscope according to a first embodiment of the present invention. The illustrated rigid endoscope 1 includes an elongated insertion section 2 inserted into a body cavity, a main body 3 connected to a base end thereof, and an eyepiece section 4 provided on the main body 3. In these insertion part 2, main body 3, and eyepiece part 4,
An observation optical system 5 is built in, and an eyepiece 6 is attached to the eyepiece 4. An image obtained by an imaging means (not shown) provided at the tip of the insertion section 2 is
Through the eyepiece 6 and observed from the eyepiece 6.

A hollow pipe 7 is provided inside the insertion portion 2 and the main body 3 over the entire length thereof, and a channel 8 is formed in the pipe 7. Further, on the side surface of the main body 3, an air supply and water supply base 9 connected to the channel 8 is provided, and a cock 9 a is interposed in the base 9.

Further, an opening formed in the base of the main body 3 is closed by a lid 10. A ring-shaped sealing material 11 is fitted on the outer peripheral surface of the insertion end of the lid 10. And the lid 10 is a screw
The main body 3 and the lid 10 are sealed by the sealing member 11 in this state.
The base of the lid 10 has a protruding portion protruding outward.
10a is formed. Further, a through hole for the pipe 7 is formed in the lid 10. This through hole is connected to a large-diameter screw hole formed in the protrusion 10a. A sealing member 13 for sealing between the pipe 7 and the lid 10 is inserted into the inner bottom of the screw hole, and a mounting nut 14 for the sealing member 13 is screwed.

Further, a coupler connecting portion (adapter attaching / detaching means) 15 is screwed into a screw hole of the projecting portion 10a of the lid 10. One end of the coupler connecting portion 15 is screwed into a screw hole of the lid 10 at one end.
Male screw part 15a is formed. And this male screw part 1
5a is screwed into the screw hole of the lid 10, and the fixing screw of the lid 10 is
Fixed by 16. Further, a large-diameter flange 18 extending in the radial direction is formed at the other end of the coupler connecting portion 15. A second male screw portion 15b is formed on the outer peripheral surface of the flange 18.

Further, a hole 17 communicating with the channel 8 is provided in a shaft core portion of the coupler connecting portion 15. A large-diameter pipe insertion portion into which the end of the pipe 7 is inserted is formed at the tip of the hole 17. As shown in FIG. 3, three adjusting screws (position adjusting means) 19 arranged at substantially equal intervals in the circumferential direction are screwed to the rear end surface of the flange 18 of the coupler connecting portion 15. In the vicinity of the center of the rear end face of the flange 18, a convex
20 are protruding. An O-ring 21 for keeping airtightness between the coupler connecting portion 15 and a laser coupler (adapter) 22, which will be described later, is fitted on the base end of the convex portion 20.

On the other hand, a laser coupler 22 is detachably connected to the coupler connection section 15. This laser coupler 22 is connected to the laser device LS. In addition, this laser coupler 22
A hole 23 (communication path) through which the laser beam LB emitted from the laser device LS passes is provided at the center of the hole. This hole 23 communicates with the channel 8 via the hole 17 of the coupler connecting portion 15. Further, a substantially ring-shaped connection end portion 22a is protruded from the front portion of the laser coupler 22. This connection end 2
In 2a, a large-diameter connection flange 22c is arranged on the tip side of the small-diameter portion 22b. A lock ring 24 is rotatably attached to the connection end 22a. The lock ring 24 has a holding portion 24a attached to the connecting end portion 22a along the small diameter portion 22b so as to be able to advance and retreat in the axial direction, and the holding portion 24a.
And a cylindrical portion 24b connected to the outer peripheral portion of. Further, a female screw portion is threaded on the inner peripheral surface of the cylindrical portion 24b of the lock ring 24.

Next, the main body 3 of the hardening endoscope 1 configured as described above.
The attachment of the laser coupler 22 to and the adjustment of the attachment position will be described.

First, the laser coupler 22 is connected to the main body 3 via the coupler connecting portion 15 by screwing the lock ring 24 of the laser coupler 22 to the flange 18 of the coupler connecting portion 15. In this case, with the operation of screwing the female screw portion on the inner peripheral surface of the cylindrical portion 24b of the lock ring 24 along the second male screw portion 15b of the coupler connection portion 15, the pressing portion 24a of the lock ring 24 causes the laser coupler 22 to move. Connection flange 22c is coupler connection 1
5, the laser coupler 22 is fixed to the main body 3 side. At this time, the 3 screwed to the flange 18
The connection flange portion 22c of the laser coupler 22 is abutted against the head of the adjustment screw 19. Accordingly, the mounting angle of the laser coupler 22 with respect to the main body 3 changes according to the amount of the screw 19 screwed into the flange 18. That is, by appropriately adjusting the screwing amount of the screw 19, the plane formed by the heads of the three screws 19 is orthogonal to the longitudinal axis of the channel 8 regardless of the processing accuracy and the assembly accuracy of each part. Can be In other words, the alignment between the channel 8 and the laser coupler 22 can be adjusted. In this case, since the laser beam LB can always be guided to pass through the center of the channel 8,
Erroneous operation during use is prevented.

In addition, if the manufacturer of the rigid endoscope 1 adjusts the screwing amount of the screw 19 before shipment, the user can use the laser beam.
There is no need to adjust the optical axis of the LB at all, and the prevention of erroneous operations is further ensured.

Next, a second embodiment of the present invention will be described with reference to FIGS.

In the figure, a coupler connecting portion (adapter attaching / detaching means) 31 is loosely inserted into a hole 33 provided in a lid 32. That is, the hole
The inner diameter of 33 is formed larger than the outer diameter of the coupler connecting portion 31. Further, there is a play for finely adjusting the mounting position of the coupler connecting portion 31. The coupler connecting portion 31 loosely inserted into the hole 33 is fixed in the vertical direction with two screws (position adjusting means) 34. At a cross-sectional position indicated by line AA slightly away from the screw 34, the horizontal direction of the coupler connecting portion 31 is fixed by two screws (position adjusting means) 35 as shown in FIG. . An O-ring 36 is provided between the coupler connecting portion 31 and the nut 14 to ensure airtightness.

According to the structure of the second embodiment, by adjusting the screw-in amount of the screw 35, the mounting position of the coupler connecting portion 31 is fine in the horizontal direction, that is, in the left-right direction about the linear axis connecting the two screws 34. Can be adjusted. Similarly, fine adjustment in the vertical direction with the two screws 35 as fulcrums can be performed by adjusting the screwing amounts of the screws 34. Therefore, with the coupler connecting portion 31 loosely inserted into the hole 33, the coupler connecting portion 31 can be moved up, down, left, and right by adjusting the screwing amounts of the screws 34 and 35, and the coupler connecting portion 31 can be positioned. In this case, there is an advantage that positioning can be performed even when various devices such as a laser coupler and a measuring device for positioning are attached to the coupler connection unit 31.

FIG. 6 shows a third embodiment of the present invention. In the figure, a ring-shaped cap (position adjusting means) 44 is rotatably mounted on a shaft portion 43 of a coupler connecting portion (adapter attaching / detaching means) 42 having a channel 41 therein. A rotating member 46 with an O-ring 45 fitted externally is screwed to the tip of the shaft 43. In this state, the shaft 43 and the rotating member 46 are sealed by the O-ring 45. This rotating member
The outer periphery of 46 and the inner surface of cap 44 form a curved surface having the same radius of curvature. Further, a screw 47 (position adjusting means) is screwed to the cap 44 from three directions (only one direction in the drawing) to fix the shaft 43 of the coupler connecting portion 42. The rear inner surface of the lid 48 fixed to the main body 3 also has a curved surface similar to the outer periphery of the rotating member 46.

Here, at the time of attaching the coupler connecting portion 42, the cap 44 is screwed onto the screw portion 49 of the lid 48 while the turning member 46 is fitted on the curved surface of the lid 48.
42 is connected to the main body 3. In this case, when the cap 44 and the screw 47 are slightly loosened, the coupler connecting portion 42 can be moved in all radial directions, so that a desired mounting position can be selected. After the mounting position is determined, the coupler connecting portion 42 is fixed at a desired mounting position by tightening the cap 44 and the screw 47.

In each of the above embodiments, the case where a laser coupler is used as an adapter that requires accurate positioning with respect to the endoscope main body 3 has been described, but the present invention is not limited to this.

[Effects of the Invention] As described above, according to the rigid endoscope of the present invention, the mounting position of the adapter connected to the endoscope main body via the adapter attaching / detaching means can be easily adjusted by the position adjusting means.

[Brief description of the drawings]

FIG. 1 is a side view of a rigid endoscope according to a first embodiment of the present invention, in which main parts are cut away, FIG. 2 is a detailed sectional view of the vicinity of a coupler connecting portion in FIG. 1, and FIG. 1 and 2 are rear views of the coupler connecting portion, FIG. 4 is a detailed sectional view showing the vicinity of the coupler connecting portion of the rigid endoscope according to the second embodiment of the present invention, and FIG. 5 is A in FIG. FIG. 6 is a detailed sectional view of the vicinity of the coupler connecting portion of the rigid endoscope according to the third embodiment of the present invention, and FIG. 7 is a sectional view of a main part of the conventional rigid endoscope. FIG. 3 ... rigid endoscope body, 8 ... channel, 15, 31, 42 ...
… Coupler connection (adapter attachment / detachment means), 19,34,35,47…
... Adjustment screw (position adjusting means), 22 ... Laser coupler (adapter), 24 ... Hole (communication passage).

Claims (1)

(57) [Claims] 1. A rigid endoscope having an adapter attaching / detaching means for detachably connecting an adapter having a communication passage communicating with the channel to an endoscope main body having a channel through which a medical treatment tool or the like can be inserted. The rigid endoscope according to any one of claims 1 to 3, wherein a position adjusting means for adjusting the mounting position of the adapter is provided in the adapter attaching / detaching means so that the axis of the channel and the axis of the communication passage substantially coincide with each other. .