JP2986052B2 - Endoscope optical member mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an optical member for an endoscope, and more particularly to a structure for mounting and adjusting an optical member such as an image guide at a predetermined position with respect to an optical axis.

[0002]

2. Description of the Related Art In general, an endoscope apparatus has a scope using an optical fiber, and an eyepiece is arranged on an operation part of the scope. When inserted into the observation object, the observation object can be observed through the eyepiece.

FIG. 7 shows a conventional connection structure of an image guide in an eyepiece. An image guide 1 provided up to the distal end of an endoscope has a holding member 2 attached to a holding screw 2 (set screw). Screw 3) or the like. The holding member 2 is fixed to a hollow cylindrical support member 4 on the eyepiece side by, for example, four set screws 5. An eyepiece 6 is optically connected to the image guide 1. In this case, a mask 7 provided on the end face of the image guide 1 on the eyepiece 6 side is positioned at a predetermined position on the optical axis. Adjusted to be placed. The position adjustment of the image guide 1 with respect to the optical axis is performed by the plurality of set screws 5 described above.

[0004]

However, in the adjustment (positioning) of the conventional set screw 5 described above,
There was a problem that a dent mark was formed on the wall surface of the holding member 2 with the sword tip of the set screw 5, and it was difficult to perform adjustment again due to the dent mark. That is, as shown in FIG. 8, when the set screw 5 is squeezed to the wall surface of the holding member 2,
Will open. For this reason, at the time of re-adjustment, the set screw 5 reenters the dent mark 8, and it is difficult to perform the desired adjustment, and the adjustment takes time.

The holding member 2 shown in FIG. 7 has a configuration in which a flange-shaped projection 2A is in contact with the end surface of the support member 4, and a contact portion of the projection 2A and a fastening portion of the set screw 5 are formed. The holding member 2 is fixed by the two engagements. However, in the fixing using the contact state of the projection 2A, a firm fixing state may not be obtained.
This also causes the image guide 1 not to be positioned smoothly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to prevent the formation of a dent mark and to obtain a strong and reliable fixing state when fixing by two engagements. Thus, an object of the present invention is to provide an endoscope optical member mounting structure capable of easily and quickly adjusting an optical member.

[0007]

To achieve the above object, the present invention provides an endoscope in which a holding member for an optical member is fixed with a set screw and adjusted so as to have a predetermined positional relationship with the optical axis. In the mounting structure of the mirror optical member, the holding member has an opening angle V smaller than a sword angle of the set screw.
Forming a groove in the V-groove by engaging the threaded loop-taker point, characterized in that fixed and adjusting the optical member. In the case where the holding member of the optical member is fixed by engagement at two locations in the axial direction, the V-groove is axially tightened from the center point of the V-groove to the vertex of the screw. Characterized by being formed in a state shifted by a predetermined amount in the direction in which force acts

[0008]

According to the above construction, a V-groove is formed at the corresponding position from the beginning, and since the opening angle of the V-groove is smaller than the angle of the screw tip, it is possible to prevent a dent mark from being formed at the screw tip. Re-adjustment becomes easier. Further, when fixing at two places in the axial direction, for example, when fixing with both the engagement of the flange-like projection and the screwing, the positional relationship is such that the center point of the V-groove is shifted inward from the vertex of the sword. The screw is tightened while pushing the holding member of the optical member outward in the axial direction. Therefore, the fixed state of the two fixing portions is firmly and reliably secured by the axial tightening force and the vertical tightening force.

[0009]

FIG. 1 shows a mounting structure of an optical member in an eyepiece of an endoscope according to an embodiment.
Numeral 0 is connected to the endoscope operation unit on the left side of the figure, and is viewed from the arrow direction 100 on the right side. In the eyepiece unit 10, a lens unit 13 is accommodated in an inner cylinder 12, and a mount ring (outer peripheral ring) 14 is provided on the outside. A camera can be connected to the mount ring 14. Further, an operation ring 15 for diopter adjustment is provided, and by rotating the operation ring 15, the lens unit 13 is moved by a minute amount in the axial direction, thereby enabling diopter adjustment.

[0010] An image guide 16 is provided on the left side of the figure to the end of the endoscope. The image guide 16 guides an image inside the body to be observed to the eyepiece 10. The image guide 16 is held by a hollow cylindrical holding member 18, which is inserted into a first supporting member 19 which is a cylindrical tube, and is fixed by a set screw 20 which is a set screw. You. The first support member 19 is fixed to a second support member (cylindrical tube) 22 on the endoscope operation unit side with a screw or the like.
Are fixed to the inner cylinder 12 with screws or the like.

FIG. 2 shows the inside of the inner cylinder 12 taken along the line II-II of FIG. 1. In the embodiment, as shown in FIG.
The holding member 18 of the image guide 16 is fixed by four set screws 20. By adjusting these set screws 20, the center of the image guide 16 is made to coincide with the optical axis of the lens unit 13, and the mask 23 set at the end of the image guide 16 as shown in FIG. Adjusted to the position. This alignment is an important operation for observing an enlarged image.

FIG. 3 is a detailed view of the holding member 18 and the first support member 19. As shown, the image guide 16 is fixed to the holding member 18 with set screws 24, screws 25 and the like. You. The holding member 18 has a flange-shaped projection 18A at one end, and the projection 18A abuts on the end surface of the first support member 19, whereby positioning and fixing of one end of the holding member 18 is performed. Will be And
At the other end of the holding member 18, four V-grooves 27 are formed corresponding to the mounting positions of the set screws 20.

FIG. 4 is an enlarged view of the V-groove 27. The opening angle a of the V-groove 27 is smaller than the sword angle b (for example, 90 degrees) of the set screw 20 (a <90 °).
b) is formed. That is, FIG. 5 shows the V-groove 28 when the opening angle a and the blade point angle b are the same,
In this case, as in the conventional case, a dent mark is left on the side surface of the V-groove 28 with the tip of the set screw 20. But,
In the present invention, since the blade point angle b is larger than the opening angle a, the blade point of the set screw 20 is prevented from forming a dent mark on the side surface of the V groove 27, and the adjustment is performed smoothly again.

As shown in FIG. 4, the center (bottom) point of the V-groove 27 is formed at a position shifted inward by a length C from the sword apex of the set screw 20. According to FIG.
As can be understood from FIG. 5, since the projection 18A is in contact with (engagement with) the end face of the first support member 19, the holding screw 18 is tightened by the set screw 20 in the leftward direction in the drawing (axial direction). ), The tightening force 200 acts. Therefore, coupled with the vertical tightening force of the set screw 20,
A strong fixed state is obtained.

FIG. 6 shows another example of the configuration in which the tip of the sword of the set screw 20 and the center point of the V groove 27 are shifted. The holding member 30 on the upper side of the figure is a case where it engages with the inner protruding portion 31A formed on the distal end side of the first support member 31. In this case, the center point of the V groove 32 is located It is formed so as to be on the outside, so that the tightening force 201 acts on the inside. Also, the holding member 33 on the lower side of the figure
Is fixed by set screws 20 arranged at different positions in the axial direction of the first support member 34. In this case as well, the center point of the V-shaped groove 35 is located outside the apex of the set screw 20. It is formed. Therefore, in any case, an axial tightening force 201 is generated, and this tightening force 2
01 is applied to the tightening force in the vertical direction, and a strong fixed state is obtained.

[0016]

As described in the foregoing, according to the invention of the first claim, in which fixed with screws to the optical holding member, and adjusted to the optical axis becomes a predetermined positional relationship, the A V-groove having an opening angle smaller than the sword angle of the screw is formed on the holding member side, and the optical member is fixed by engaging the sword tip with the V-groove. The adjustment of the members can be performed easily and in a short time.

According to the second aspect of the present invention, the optical storage
In the case where the holding member is engaged and fixed at two positions in the axial direction, the V-groove is formed in such a manner that the apex of the screw is shifted by a predetermined amount from the center point of the V-groove in the direction in which the axial tightening force acts. In this case, there is an advantage that a tightening force is generated in the axial direction, and a strong fixed state is obtained in combination with the tightening force in the vertical direction. As a result,
Adjustment of the optical member is also facilitated.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a mounting structure of an optical member of an endoscope eyepiece according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration inside the inner cylinder in a II-II cross section of FIG. 1;

FIG. 3 is a detailed view of an image guide holding member and a support member of FIG. 1;

FIG. 4 is an enlarged view of a V-groove formed in the holding member.

FIG. 5 is a view showing a case where an opening angle of a V-groove according to the embodiment is equal to a sword angle of a set screw.

FIG. 6 is a diagram showing another configuration example in which the tip of the set screw is shifted from the center point of the V-groove.

FIG. 7 is a cross-sectional view showing a mounting structure of an optical member in a conventional endoscope.

FIG. 8 is a view showing a state where a set screw is attached in the related art.

[Explanation of symbols]

 1,16 ... image guide, 2, 18, 30, 33 ... holding member, 5, 20 ... set screw (set screw), 19, 31, 34 ... first support member, 27, 28, 32, 35 ... V groove , A ... V-groove opening angle, b ... Set screw point angle.

Claims (2)

(57) [Claims] 1. A fixed with screws holding member of the optical member, and the mounting structure for an endoscope optical member to be adjusted to the optical axis becomes a predetermined positional relationship, the set screw in the holding member side Opening angle V smaller than the sword angle
Mounting structure for an endoscope optical member forming a groove, in the V-groove by engaging the threaded loop-taker point, characterized in that fixed and adjusting the optical member. 2. When the holding member of the optical member is fixed by engagement at two locations in the axial direction, the V-groove is
2. The endoscope optical member mounting structure according to claim 1, wherein the tip of the screw is shifted from the center of the V-groove by a predetermined amount in a direction in which the tightening force acts in the axial direction.