JPS5872117A - Length measuring endoscope - Google Patents

Abstract

PURPOSE:To detect easily the size of an object, by changing the position of an index, which is provided on a circle in the visual field, in accordance with backward and forward movement of an eyepiece lens system for focusing to measure the length of the object. CONSTITUTION:When a length measuring endoscope is allowed to approach an object 2' as shown in figure by dotted lines and is the object 2' is observed from an eyepiece part 17, a knob 25 is turned counterclockwise to move backward an eyepiece lens 16 for the purpose of a vivid image. Simultaneously, a rotary ring 24 is rotated counterclockwise, and a length measuring index 33 provided on the rotary ring 24 is rotated, and a length (l) between indications 33 and 34 is extended. When the far object 2' is observed, the length (l) is shortened. Consequently, the length (l) is compared with the size of the object in the visual field to detect the size of the object 2'.

Description

Detailed Description of the Invention This invention adjusts the focus by moving the eyepiece system back and forth, and by changing the position of the index provided on the circumference within the field of view, the secondary length of the object can be adjusted. This invention relates to a length-measuring endoscope that makes it possible to measure length.

In recent years, endoscopes have been widely used in diagnosis and treatment within body cavities.

When observing an object such as an affected area using the above-mentioned endoscope and making a diagnosis based on this observation, it is often necessary to know the size of the object such as the affected area (when making a diagnosis). be. Conventionally, for this purpose, it has generally been used to provide an endoscope with a channel for length measurement, or to use a channel for inserting a treatment instrument also as a sub-length.

However, if the channel is used for the vice length in this way, the diameter of the insertion portion becomes thicker, causing pain to the patient during insertion.Also, if the channel is also used, it is difficult to quickly measure the length or perform prompt treatment. This has caused the inconvenience of not being able to perform the procedure, which has caused a major problem, especially in diagnosis or treatment in non-urgent cases.

This invention was made in view of the above points,
An index that is linked with focus adjustment is provided on the periphery of the field of view in which the object is attached, and configured so that it is easy to compare the length of the reference represented by the index and the size of the object. The purpose of this invention is to provide a length-measuring endoscope that can easily determine the size of objects.The present invention will be explained with reference to the drawings. This is an explanatory diagram for explaining the principle of 0. In the same diagram, an object 2Fi shown by an arrow mark on the moving blade of the objective lens thread 1 is mowed down at a position and size according to the distance 11 between them. 0 Same, same figure (IL) Fi, object 2
When the object 2 of the same size is located at a short distance, Figure (b) shows the case where the object 2 of the same size is located at a long distance.0 The optical image formed by the objective lens system l is composed of a relay lens system. The image transmission means 3 (shown as a single lens in the figure)
The information is transmitted to the eyepiece system 5kJ position along the original axis 4, and by adjusting the focus by finely moving the eyepiece system 5 back and forth along the original axis 4, the optical image is enlarged and clearly imaged. Therefore, as shown in Figure 2, for example, a crosshair is formed at the center and is formed at the top of the circular field of view, and there are usually identification indicators that can be used to determine the front and back of the film as well as the top and bottom. For example, during the above-mentioned focus adjustment, an indexing mechanism is provided that moves in conjunction with the same rotation, and the distance (length) between the inner indexing points is set to a length that depends on the distance at which the object is observed through the eyepiece system 5. To change the size according to K, the size of the observed object 2 is compared with the observed length between the indicators, regardless of the distance.
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The configuration of an embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 shows a sectional view showing the main parts of this embodiment.
The figure shows an explanatory view of the drive plate in the above embodiment, and FIGS. 4 and 5 are lines A-A and A-A in FIG. 3, respectively.
A sectional view taken along the line '-A' is shown. This length-measuring endoscope (■) is equipped with an insertion section and a base (s) 14 which is installed inside the insertion section (ν) and connects a light guide 13 (not shown) to a light source device (not shown). The gripping portion 15 and the gripping portion 1
5 and an eyepiece section 17 having an observation eyepiece system 16 installed therein. The grip section 15 and the eyepiece section 17 are constructed as described below.

The 10,000 (front) end of the approximately cylindrical gripping portion 1b is connected to a light guide 13 that transmits illumination light to the tip of the insertion portion 12 and an objective lens system in an observation window provided at the tip of the insertion portion 12. An insertion section 12 that includes an image transmission means 18 constituted by a relay lens system that transmits an image! jP
The other end (tlk side) has an eyepiece window (glass).
An eyepiece portion 17 is formed by screwing together an eyepiece (eyepiece frame) having an eyepiece 19. A photographing device IIt is detachably attached to the eyepiece via a photographing adapter having a photographing lens (not shown).

A cylindrical eyepiece frame 21 into which the cylindrical inner wall part K and the hollow outer wall of the front gripping part 15 fit is installed, and this eyepiece frame 2
An eyepiece lens n is fitted in an annular recess formed in the rear end inner wall separated by a predetermined distance from each other, and a focal plate n on which an optical image is imaged is placed in the annular convex part of both inner walls.
1. A field mask defining a field of view in which an object is observed and a rotatable rotating ring 24 disposed near the focusing plate 4 are fitted on the side wall of the upper gripping portion 15. is formed with a convex portion 26 having a through hole and a storage space inside, and the through hole is provided with a photoreceptor 5.
The shaft is fitted and inserted through the shaft, and the tip 4 of this shaft is connected together with the disk-shaped drive plate that comes into contact with the inner tank of the storage space of the convex portion 26.
ing. This drive plate 27KFi r(:
, (N is a direction perpendicular to the center) The first and wI2 bottles protrude inward (bottom 141 in FIG. 3) at two locations.

The four parts are screwed together. The @1 bottle 28 provided on the drive plate 27 is connected to the inner eyepiece as shown in the cross-sectional view of figure M5 taken at the position of pin 4 (0 in Figure 3 indicated by the symbol A-A@). It penetrates the through hole (hole) formed in the frame 21, and further on the inner wall of this eyepiece frame 21,
It is configured to fit into the moth-like recess 31 provided in the first turn 1i124 with which the outer wall abuts.
As shown in the figure, when the spindle is operated and its axis is rotated (turn a) so that it crosses the arrow B, the first bottle transfer is at the arrow C.
The first pin moves as shown in FIG.
As a result, the rotation jJ24 is configured to rotate in the direction shown by the arrow in FIG. 5 while contacting the inner wall of the eyepiece lens block 21. , the eyepiece frame 21 moves back and forth.
This is so that the portion to be suppressed with a bin ratio of 1 moves back and forth.

On the other hand, in the second bin 21t%3 figure, this bin 2
As shown in the schematic lfr plane view of FIG. 6 cut at position 9 (indicated by line A'-A'), the lens frame 21 is formed along the lateral direction (center axis and screen direction) K of the eyepiece frame 21. When the second pin device is fitted into the transversely shaped recess 32 and moved in the direction indicated by the arrow mark as shown in FIG. The matching eyepiece frame 21 is moved forward and backward in the central axis direction (perpendicular to the plane of the paper), that is, in the central axis direction: $
K111 has been set to move. This eyepiece frame 2
The movement of VC#I is regulated by a screw screwed into and protruding from this cylindrical portion.

As shown in FIG. 7, the front rotation ring having a concave portion 31 formed in its outer wall is provided with a chivalry-shaped sub-length finger 41133 projecting inward on the same upper side, and is connected from the eyepiece portion 17 to the focusing plate. 22
When observing the optical image formed on the surface, the length measurement index blade is constructed so that it can be observed along with the fixed index commonly used for determining the front and back sides of the film, as shown in Figure K8. There is.

The above-mentioned rotating monkey gyro is such that when the photographic lens δ is rotated, as the eyepiece frame 21 moves back and forth, it engages with the first bin 4 and rotates (rotates) as shown by the arrow E. In this case, the amount of rotation of the rotating ring 24 (i.e., the amount of rotational movement of the slider for length measurement) is the amount of rotation (in the plane) within the field of view of the fixed indicator and the index blade for scooping length. The distance t (0 shown in FIG. 8) is #f as described above.

That is, the distance between these two indicators 33 and 34 is 1IltI/i
, 4- is formed to have a length that has a certain relationship with the size of the object imaged within the field of view when the object is observed at different distances from the objective lens system.

In this way, the focusing plate 22 and the eyepiece system 16 arranged so that the optical images formed thereon can be magnified Mu at predetermined intervals are integrally connected by the eyepiece frame 21 along the optical axis. A first and a second bin 29 are provided on a drive plate 27 connected to the camera 6, which is connected so as to be able to move back and forth, and which is an operating means for adjusting the good sleep lens frame 21.
By the focus gM1 operation in the camera 6, the eyepiece frame 21 that engages with the second pin device is moved back and forth, and the first pin 28 rotates the rotation ring 1124. K with the rotation of the drum.

111 for the vice-chief is also rotated, and the distance t#'i between the two targets of its one rotation class is made to give the reference length at the distance at which the object is observed. There is.

According to this embodiment configured in this way, the focus is adjusted by moving the Kri camera. With this rotation of the tomb, its axis also moves, and the first and second pin devices, 29Fi, move in the directions shown in FIG. 4, respectively.

That is, by the movement of this second bottle device, the eyepiece frame 21Fi, which engages with the pin device of sR2, moves to the ti1 eel,
The rotation jJ 24 Fi which engages the first bottle sill makes one turn as shown in FIG. 5 or #'i FIG. As a result of this (B) rotation, the vice-length finger 1133 also rotates as shown in FIG. 7, and when viewed from the eyepiece 17, both indicators are aligned as shown in FIG. K8.

The distance t between the arms will represent the reference length at the position where the object is observed.

According to the length-measuring endoscope 11 constructed in #II, for example, as shown in Figure K9, the length-measuring endoscope is shown by a broken line on a protruding object 2' such as a tumor on the body wall, etc. close to each other,
l! When observing from the eye part 17, the eyepiece system 16 is moved backwards (with respect to the object 2' at a long distance) in order to form a clear image of the palpitation, so that the viewing angle is set counterclockwise in FIG. Suppose that it is moved in the direction (b). Rotate with this! 24Fi, rotated counterclockwise in the 5th row,
At this time, the length measurement indicator provided on the rotating ring 24 is
(b) The distance tFi between both index wings 34 becomes longer as a result of the rotation. On the other hand, when observing a distant object 2', 1. The coming lens system 16 is moved in both directions contrary to the above, and the distance between the two indices O and 34 is shortened by t.

In this way, when observing the object 2' at a short distance and a long distance from the eyepiece 17, the object 2' in each case is photographed in Fig. 1θ (IL) and (b), respectively. As shown in the figure, along with the optical image formed with dimensions according to the distance, the distance l@(length)t of both indicators 33 and 34 on the circumference of the field of view indicates the reference length at that distance. I will do it. Therefore, the observer should
The size of the object 2' can be determined from the distance t between them.

In the above embodiment, the rotating ring 24 is configured to be rotated by operating the camera 5.
As another embodiment, for example, the grip portion 15 may include a guiding screw aS.
is formed, and the eyepiece system 16 is moved back and forth when adjusting the focus by operating along this cotton wire groove, and the ring is rotated once, and the sub-length index is rotated accordingly. It can also be configured to be moved.

The above-mentioned index 33 (including the index A) Fi is, of course, not limited to the horizontal shape, but may have other shapes, and the distance t is not a straight line distance, but a length along an arc. (distance).

As described above, according to the present invention, the index provided in the vicinity where the optical image is formed via the relay lens system and on the circumference of the field of view where the optical image is observed is adjusted simultaneously with the focus adjustment of the eyepiece lens system. , is configured to rotate and move so as to represent the reference length of the object observed within the field of view,
It is easy to compare the size and length of the object in the field of view, and has the effect of easily knowing the size of the object.In addition, the position of the length measurement index can be determined from the objective lens system. It has the advantage that it can be used to indicate the distance to an object, and that it can also function as a distance 7111 hand.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are explanatory diagrams showing the optical system when observing objects at near and far distances with an endoscope, respectively, and Figure 2 shows the field of view seen from the eyepiece. Explanatory diagram showing, 3rd
10 are cross-sectional views showing the structure of the length-measuring endoscope according to the length-measuring endoscope of the present invention, and FIG. An explanatory diagram showing
5 is a sectional view taken along the line A-A in FIG. 3, FIG. 6 is a sectional view taken along the A'A/ line in FIG. The figure is an explanatory diagram showing the field of view seen from the eyepiece,
Figure 9 is a schematic front view showing how near and far objects are observed at a family celebration; Figures 10(a) and (b)
) are explanatory diagrams showing visual field images when the object shown in FIG. 9 is observed from the eyewear part at a short distance and a long distance, respectively. 11... Length measuring endoscope 12... Insertion section 15... Grip section 16... Eyepiece system 17... Eyepiece section 25... Photograph n... Drive plate A, 29 ...Pin O, 34... Indicator Figure 9 Procedural Amendment (Voluntary) - March 1981 Haruki Shimada, Commissioner of the Patent Office 1, Indication of the case 1981 Patent fragment 169801 Wa 2 - Invention Name: Length Measuring Endoscope 3, Relationship with the Corrector Case, Patent Applicant II Address: 2-43-2 Hatagaya, Shibuya-ku, Tokyo LC"'!;'xc Name) (037) Olympus Optical Industry Co., Ltd. Representative Shigeo Kitamura 4, Agent 160 Address 7-9-12-8 Nishi-Shinjuku, Shinjuku-ku, Tokyo
Contents of the amendment Annex (1) In the specification, page 6, lines 1 to 4, it says, ``In the annular recess in the inner wall in front of it, there is a focal plate 22 on which an optical image is focused, and a primary object. are arranged near the field mask 23 and the focusing plate 220 that define the field of view range in which the field of view is observed.
[In the annular recess in the front inner wall, a focusing plate n1 is formed with a field mask n that defines the field of view range in which the object is observed, and a focusing plate n1 is disposed near the focusing plate n...
・” I corrected it. (2) From the 3rd line to the 4th line on page 8 of the specification: “'
The amount of movement of this eyepiece frame 21 is...''
The rotation of the eyepiece frame 21 around the axis is...'' is corrected.

Claims (1)

[Claims] The optical image of the object transmitted through the relay lens system is clearly brought into view within the field of view where a fixed index is provided by moving the mine eye lens system placed behind the relay lens system back and forth. Internal vision that can be observed! ! A rotationally movable index is provided at a position on the visual field where the optical image is observed in the vicinity of where the optical image of the object is formed via the Lehlen mirror system, and the index is moved to the eyepiece. 1. A sub-length endoscope, characterized in that it is configured to move the same field of view as the lens system moves back and forth.