JPS6355683B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope equipped with an image guide focus and eccentricity adjustment mechanism.

Generally, an endoscope device is equipped with an image guide made of an optical fiber bundle in its eyepiece, but this image guide is adjusted so that its end surface is at the focal position of the eyepiece and is deflected. Center adjustment allows the center to be adjusted to the center of the eyepiece.

As a device for adjusting the eccentricity of the above-mentioned image guide, a device as shown in Utility Model Application No. 54-26464, for example, is known.

However, since the above-mentioned device adjusts the eccentricity by loosening the pointed end screw, loosening the pointed end screw causes the tsuba to play, and the tsuba moves due to the gravity of the image guide, causing the focus to shift. Also, loosening the pointed end screw will cause play between the cylindrical part and the mounting frame, and the mounting frame will rotate due to twisting of the image guide and rotation of the pointed end screw, causing the end of the mounting frame to There was a drawback that the attached mask could be misaligned.

For this reason, there are disadvantages in that the eccentricity adjustment takes a long time or is often tedious, and can only be performed by an experienced person.

The present invention has been made focusing on the above circumstances,
The objective is to provide an endoscope device that does not cause the focus to shift or the mask to shift even when the eccentricity of the image guide is adjusted.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, reference numeral 1 denotes an operating section of an endoscope, to which an insertion section 2 is connected and an eyepiece section 3 is provided. Further, a connector 5 is connected to the operation section 1 via a universal cord 4. The eyepiece section 3 is constructed as shown in FIG. That is, 6 is a cylindrical body integrally formed with the operation section 1, and a cylindrical eyepiece frame 7 is screwed onto the protruding end of the cylindrical body 6. The eyepiece frame 7 is rotated so as to be moved along the optical axis l of the eyepiece optical system. Further, an eyepiece lens 8 is attached to the center of the eyepiece frame 7. On the other hand, an image guide 9 is inserted into the cylindrical body 6, and this image guide 9 is composed of a pipe 10 and an optical fiber bundle 11 inserted into the pipe 10, and its exit end face is connected to the eyepiece lens 8. is facing. The optical fiber bundle 11 allows the observation image inside the body cavity to be transmitted to the exit end surface. Further, the image guide 9 is inserted into a cylindrical mounting frame 12 and fixed with screws 13. Further, a ring 14 is screwed onto one end of the mounting frame 12, and a spring 15 constituting a holding means is interposed between the ring 14 and the end surface of the cylindrical body 6. Further, a flange 16 that projects outward is formed at the other end of the mounting frame 12, and this flange 16 is connected to the spring 1.
The mounting frame 12 is forcibly held by the biasing force 5 in contact with the inner end surface of the cylindrical body 6. Further, a plurality of adjustment screws 17 are attached to the side wall of the cylinder 6, and these adjustment screws 17
... allows the mounting frame 12 to be positioned in a direction orthogonal to the optical axis l. Further, a mask 18 is attached to the exit end surface of the image guide 11.

Therefore, in the above-described configuration, the eyepiece lens 8
If the image appearing on the exit end surface of the image guide 9 is not clearly visible, the eyepiece frame 7 is rotated by a predetermined amount to adjust the focus so that it can be clearly seen. Next, check whether the centers of the image guide 9 and the eyepiece lens 8 are misaligned, and if they are misaligned, rotate the plurality of adjustment screws 17 by a predetermined amount to adjust the protrusion of the image guide 9. Correct the eccentricity by moving it in a direction perpendicular to axis l. In addition, the mask 18 of the image guide 9
If the direction of the index is off, adjust it by rotating the mounting frame 12.

When adjusting the eccentricity of the image guide 9 described above, the adjustment screws 17 are loosened, but since the mounting frame 12 is held by the holding member as described above,
Even if the adjustment screws 17 are loosened, the mounting frame 12 will not move due to the weight of the image guide 9.

Therefore, when adjusting the eccentricity of the image guide 9, the image guide 9 does not fall and become out of focus, or the image guide 9 rotates and the mask 18 shifts, making the adjustment work easier.

In addition, since the force of the adjustment screws 17 acts in a direction perpendicular to the axial direction of the mounting frame 12,
2 has never been tilted diagonally.

As explained above, the present invention is provided with a holding means for biasing and holding the image guide mounting frame in the optical axis direction at a predetermined position within the cylinder of the eyepiece. Even if I adjust the eccentricity of the mask, the mounting frame does not move like in the past, and I have never had the problem of losing focus or misaligning the mask. Therefore, the eccentricity adjustment becomes easy, and even an unskilled person can easily perform the adjustment. Further, the spring constituting the holding means is provided concentrically with the image guide, and is biased in the optical axis direction of the image guide between the ring and the cylindrical body, which conventionally has ample space. Therefore, the above-mentioned effects can be obtained without increasing the diameter or axial dimensions of the eyepiece, and the operability of the operating section is not affected.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, and FIG. 1 is a schematic configuration diagram showing an endoscope device;
FIG. 2 is a longitudinal sectional view showing the main parts. 3... Eyepiece section, 9... Image guide, 12...
... Mounting frame, 6... Cylindrical body, 15... Holding means.

Claims (1)

[Claims] 1 Equipped with an image guide mounting frame inside the eyepiece,
The mounting frame is surrounded by a cylindrical body and has adjustment means for adjusting the eccentricity and rotation of the mounting frame between the cylindrical body and the mounting frame, wherein the mounting frame is placed at a predetermined position within the cylindrical body. An endoscope apparatus characterized in that it is provided with a holding means that is biased in the axial direction to hold the endoscope.