CN115032785A

CN115032785A - Fiberscope eyepiece system and fiberscope comprising same

Info

Publication number: CN115032785A
Application number: CN202210823087.7A
Authority: CN
Inventors: 唐海涛; 陈静; 丁文龙; 刘庆成; 卞迎宾; 顾海洋
Original assignee: Jiangsu Suzhong Pharmaceutical Group Medical Devices Co ltd
Current assignee: Jiangsu Suzhong Pharmaceutical Group Medical Devices Co ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2022-09-09
Anticipated expiration: 2042-07-14
Also published as: CN115032785B

Abstract

The invention discloses a fiber endoscope eyepiece system and a fiber endoscope eyepiece comprising the system. The system comprises an eyepiece inner tube, an eyepiece outer tube and a focus adjustment ring. A lens group is installed inside the eyepiece inner tube, and a surface is provided with a lens group. Positioning hole; the barrel body of the outer barrel of the eyepiece is provided with a connecting groove with the card groove, the guide rail and the connection between the two, the card groove is open along the front end of the barrel body, the guide rail is closed along the front end of the barrel body, and the card groove and the bottom end of the guide rail are connected by The grooves are connected; the inner wall of the focusing ring is provided with an inwardly protruding buckle; the inner tube of the eyepiece is set inside the outer tube of the eyepiece, the focusing ring is sleeved on the outer wall of the outer tube of the eyepiece, and the buckle is located in the guide rail and inserted into the positioning hole to adjust the The focal ring can drive the inner tube of the eyepiece to move inside the outer tube of the eyepiece. The system is removable to avoid repeated decontamination. The split lens barrel avoids the deformation of the spacer, and the limit lens barrel reduces the difficulty of process assembly. Snap-on focusing ring, easy to assemble, fix the position and distance of the lens barrel, quantitatively move to reduce deviation, and accurately and quickly adjust the image.

Description

Fiberscope eyepiece system and fiberscope comprising same

Technical Field

The invention belongs to the technical field of fiber endoscopes, and particularly relates to a fiber endoscope eyepiece system and a fiber endoscope comprising the same.

Background

The ocular structure of the reusable fiber endoscope generally comprises an ocular cover, a focusing ring, an ocular set and the like. Most of the finished eyepieces and insertion parts on the market are designed integrally, and due to the requirement of medical endoscopes on electrical insulation, most of the medical endoscope eyepiece covers on the market are made of insulating plastics, and the endoscopes are repeatedly cleaned and sterilized (washing and disinfecting for short) after clinical use, so that the plastic eyepiece covers are easy to have mechanical damage and cannot be used. Therefore, it is necessary to design a detachable endoscope eyepiece system to avoid repeated washing and decontamination of the eyepiece portion.

The fiber endoscope imaging is that reflected light of an object is converged by an objective lens, then is transmitted by an imaging optical fiber image transmission bundle to be transmitted, is amplified by an ocular lens, is subjected to photoelectric conversion by a CCD (charge coupled device), and finally is displayed on a computer or a display. The eyepiece of the fiberscope is used for magnifying an image for convenient observation, and the design of the eyepiece of the fiberscope generally needs aberration elimination.

Parameters such as the magnification, the exit pupil distance, the resolving power, the optical transfer function and the like of the lens group require that the distance precision between the lens groups is as high as 0.005mm, the width of part of the space rings is less than 1mm, and meanwhile, the concentricity and the flatness of the space rings of the same group also have requirements. The traditional lens group is generally isolated in a space ring mode, the space ring is large in diameter and small in width, the space ring is difficult to process, and the space ring is easy to deform in the assembling process, so that the processing cost of the ocular lens isolated by the traditional space ring mode is too high.

The lens group is fixed inside the lens cone, the focusing mode of the prior ocular lens generally locks the lens cone by a locking screw, the lens cone is moved to observe imaging picture quality, and the screw is locked to complete the focusing step after the imaging picture quality is clear, wherein the locking screw is manually moved, the focusing time is long, and the optimal focusing position cannot be found necessarily.

Therefore, there is a need to develop a fiber endoscope which can eliminate aberration, has high product precision, is convenient to assemble, has high production efficiency, and can accurately and quickly adjust the image.

Disclosure of Invention

The purpose of the invention is as follows: in order to solve the problems in the prior art, the invention provides a fiber endoscope eyepiece system and a fiber endoscope comprising the same, which can eliminate aberration, have high product precision, are convenient to assemble, have high production efficiency and can accurately and quickly adjust the image.

The technical scheme is as follows: in order to achieve the purpose of the invention, the invention adopts the following technical scheme:

an eyepiece system of a fiber endoscope comprises an eyepiece inner cylinder, an eyepiece outer cylinder and a focusing ring, wherein a lens group is arranged in the eyepiece inner cylinder, and a positioning hole is formed in the surface of the eyepiece inner cylinder; the barrel body of the eyepiece outer barrel is provided with a connecting groove communicated with the clamping groove, the guide rail and the connecting groove, the clamping groove is opened along the front end of the barrel body, the guide rail is closed along the front end of the barrel body, and the clamping groove is communicated with the bottom end of the guide rail through the connecting groove; the inner wall of the focusing ring is provided with a fastener which protrudes inwards; inside eyepiece urceolus was located to the eyepiece inner tube, focusing ring cover in eyepiece urceolus outer wall, the buckle is located the guide rail to insert the locating hole, focusing ring can drive the eyepiece inner tube and remove in eyepiece urceolus is inside.

As a preferable or improved scheme:

the eyepiece inner cylinder comprises an upper lens barrel and a lower lens barrel, the inner walls of the upper lens barrel and the lower lens barrel are provided with mutually corresponding clamping grooves for placing lenses in the lens group, and the upper lens barrel and the lower lens barrel are sealed and fixed together to form the eyepiece inner cylinder.

The lens group in the eyepiece inner cylinder comprises a first combined lens, a first lens, a second combined lens, a third lens and a fourth lens which are sequentially arranged.

Further preferably, the first combined lens, the second combined lens, and the third combined lens are each formed by combining a positive lens and a negative lens. The other lenses are all flat lenses; in particular, the fourth lens is positioned at the front end of the inner barrel of the eyepiece.

The clamping groove and the guide rail are parallel to the central shaft of the eyepiece outer barrel, and the connecting groove is perpendicular to the clamping groove and the guide rail.

The buckle is an inverted cone-shaped buckle.

The material of mirror inner tube, eyepiece urceolus and focusing ring is the metal material.

The buckle is manufactured by cutting the focusing ring to form a groove and bending a part of cutting sections.

The invention also provides a fiber endoscope eyepiece which comprises the fiber endoscope eyepiece system.

As one embodiment, the eyepiece of the fiber endoscope comprises an eyepiece sleeve, an eyepiece cover, a focusing hand wheel, a buckle and a buckle hand wheel, wherein the eyepiece sleeve is connected with one end of an eyepiece system of the fiber endoscope, the outer end of the eyepiece sleeve is connected with the eyepiece cover, the other end of the eyepiece system of the fiber endoscope is provided with the buckle, and the buckle hand wheel is connected with the buckle; the focusing hand wheel is sleeved on the outer wall of the focusing ring and drives the focusing ring to move through self rotation; further, still include eyepiece dead lever.

The front end and the bottom end of the eyepiece outer barrel, the clamping groove and the guide rail in the invention use the assembly direction of the eyepiece outer barrel inserted into the focusing ring as a standard, the initial part is the front end, otherwise, the initial part is the bottom end; the positions of the eyepiece inner barrel and the parts therein are described in the same way, the assembling direction of the eyepiece inner barrel inserted into the eyepiece outer barrel is taken as a standard, the initial part is the front end, and otherwise, the initial part is the bottom end.

Has the advantages that: compared with the prior art, the invention has the following advantages:

1. detachable endoscope eyepiece system during the application, for split type eyepiece, avoids the repeated washing and disinfecting of eyepiece part, avoids the damage to the part when repeated washing and disinfecting.

2. The split type lens cone with the limiting function avoids deformation of spacer ring processing and assembling processes, the limiting type lens cone reduces processing finished products, reduces procedure assembling difficulty and improves production efficiency.

3. Compared with a common screw type focusing ring, the self-provided buckle type focusing ring is simple in assembly process and improves production efficiency.

4. The position and the distance of the fixed lens cone are adjusted, deviation is reduced by quantitative movement, and image adjustment is accurate and rapid.

Drawings

FIG. 1 is a component view of a fiber optic endoscope eyepiece system of the present invention including: an eyepiece inner cylinder 1 and a positioning hole 11; the eyepiece outer barrel 2, a clamping groove 21, a guide rail 22 and a connecting groove 23; focusing ring 3, buckle 31, slot 32.

FIG. 2 is a structural diagram of an eyepiece inner barrel in an eyepiece system of a fiber endoscope, which comprises the following components: an upper lens barrel 12, a lower lens barrel 13, a first combined lens 1-1, a first lens 1-2, a second lens 1-3, a second combined lens 1-4, a third combined lens 1-5, a third lens 1-6 and a fourth lens 1-7.

FIG. 3 is a layout diagram of lens groups in an eyepiece inner barrel of a fiber endoscope eyepiece system of the present invention, which includes: the lens comprises a first combined lens 1-1, a first lens 1-2, a second lens 1-3, a second combined lens 1-4, a third combined lens 1-5, a third lens 1-6, a fourth lens 1-7 ocular plain film 1-8, an image fiber protective sheet 1-9 and a quartz image fiber 1-10.

FIG. 4 is a block diagram of an eyepiece of a fiber optic endoscope, including: the eyepiece outer barrel 2, the eyepiece barrel 4, the eyepiece cover 5, the focusing hand wheel 6, the buckle 7, the buckle hand wheel 8, the eyepiece fixing rod 9, the tee joint 10 and the insertion part 11.

Detailed Description

The present invention is described in detail below by way of examples, it should be noted that the examples are only for the purpose of further illustration, but not for the purpose of limiting the scope of the invention, and that those skilled in the art may make insubstantial modifications and adaptations of the invention in light of the above teachings.

Example 1

An eyepiece system of a fiber endoscope is shown in figure 1 and comprises an eyepiece inner cylinder 1, an eyepiece outer cylinder 2 and a focusing ring 3 which are all made of metal materials;

a lens group is arranged in the eyepiece inner barrel 1, and a positioning hole 11 is formed in the surface of the eyepiece inner barrel; as shown in fig. 2 and 3, the eyepiece inner tube 1 includes an upper lens barrel 12 and a lower lens barrel 13, the inner walls of the upper lens barrel 12 and the lower lens barrel 13 are provided with corresponding slots for placing lenses in the lens group, and the upper and lower lens barrels are sealed and fixed together to form the eyepiece inner tube 1. The lens group in the eyepiece inner barrel 1 comprises a first combined lens 1-1, a first lens 1-2, a second lens 1-3, a second combined lens 1-4, a third combined lens 1-5, a third lens 1-6 and a fourth lens 1-7 which are sequentially arranged. The first combined lens 1-1, the second combined lens 1-4 and the third combined lens 1-5 are all formed by combining a positive lens and a negative lens, other lenses are all plano-lenses, and the fourth lens 1-7 is positioned at the front end of the eyepiece inner cylinder 1.

The barrel body of the eyepiece outer barrel 2 is provided with a clamping groove 21 and a guide rail 22 (the guide rail is also a groove on the plane of the outer barrel) which are parallel to the central axis of the outer barrel, the clamping groove 21 is opened along the front end of the barrel body, the bottom end of the clamping groove 21 is communicated with the guide rail 22 through a connecting groove 23, the front end of the guide rail 22 is closed, the bottom end is communicated with the clamping groove 21, and the connecting groove 23 is vertical to the clamping groove 21 and the guide rail 22;

the inner wall of the focus ring 3 is provided with inwardly projecting catches 31, preferably in the form of reverse tapered protrusions which are bendable by cutting the focus ring 3.

Inside eyepiece urceolus 2 was located to eyepiece

inner tube

1, 3 covers in 2 outer walls of eyepiece urceolus of focusing ring, and buckle 31 is located guide rail 22 to insert the locating hole 11 in, focusing ring 3 can drive eyepiece inner tube 1 at 2 inside removal of eyepiece urceolus.

A groove 32 is reserved on the surface of the focusing ring 3, when the buckle 31 is manufactured, the groove 32 is formed by cutting the focusing ring 3, and a part of the cutting section is reserved for bending to form the buckle 31. Therefore, the buckle 31 is manufactured by the manufacturing method for forming the groove 32, and the manufacturing method is convenient and quick and has low cost.

The design and the principle of the eyepiece system of the fiber endoscope are as follows:

first, eyepiece lens assembly lens design

1.1. The lens material comprises: H-K9L, H-ZK4, H-ZK6, H-ZF7LA, H-F2, H-ZF2, H-BAK7 and H-ZF 3.

1.2. The lens is coated with an anti-reflection film, and the average reflectance after coating is less than or equal to 0.5 percent.

1.3. Normally, a positive lens produces negative chromatic aberration, and a negative lens produces positive chromatic aberration. Therefore, an achromatic optical system is generally a combination of positive and negative lenses so that their chromatic aberrations compensate each other, and thus an eyepiece portion is designed as a cemented combination.

1.4. The lens group is as follows: the curvature radius of the lens of the first combined lens 1-1 is 19.41, -5.76, -16.96, the curvature radius of the lens of the first combined lens 1-2 is 40.82, 29, the curvature radius of the lens of the second combined lens 1-3 is 39.37,13.7, the curvature radius of the lens of the second combined lens 1-4 is 62.23, -3.133, -13.7, the curvature radius of the lens of the third combined lens 1-5 is 13.7, -3.133, -13.7, the curvature radius of the lens of the third combined lens 1-6 is 7.06, -13.7, and the curvature radius of the lens of the fourth combined lens 1-7 is 3.133, 13.7.

1.5. The lens arrangement and parameters are shown in figure 3, wherein, the eyepiece lens further comprises eye connecting plain sheets 1-8, image fiber protection sheets 1-9 and quartz image fibers 1-10, the eye connecting plain sheets 1-8 are positioned at the rear end of the eyepiece inner barrel, the image fiber protection sheets 1-9 and the quartz image fibers 1-10 are arranged at the front end of the eyepiece inner barrel, and the lens group is positioned between the eye connecting plain sheets 1-8 and the image fiber protection sheets 1-9.

Second, the design of inner barrel of ocular lens set

2.1. The traditional lens cone is mostly metal tubular product, separates with the space ring of different thickness between the lens, and the requirement of lens and space ring concentricity surface quality etc. leads to the product yields low. Some manufacturers manufacture the integrated lens cone by using a plastic injection molding method, the plastic lens cone has high requirements on material shrinkage rate, and the requirements on lens fixation and distance are that core pulling cannot be smoothly performed due to back buckling when a plastic mold is designed. Therefore, the metal material combination type lens cone is designed. When having satisfied the product precision, the convenient production efficiency of equipment is high. The structure of the eyepiece inner barrel 1 is shown in figure 2.

2.2 Assembly procedure:

1) the upper barrel 12 is fixed with a clamp and laid flat on the horizontal operation table.

2) After the edges of the lenses in the lens group, which are in contact with the upper lens barrel 12, are coated with epoxy resin glue, the lenses are sequentially placed into the upper lens barrel 12, the overflowed glue is erased by absorbent cotton, and the glue is heated and cured at 65 ℃ for 4 hours.

3) Each lens in the lens group is aligned with a corresponding clamping groove on the lower lens barrel 13, epoxy resin glue is coated inside the lens barrels, the lower lens barrel 13 is embedded into the upper lens barrel 12 with the lens, glue is coated in the clamping groove between the upper lens barrel and the lower lens barrel, the upper lens barrel and the lower lens barrel are clamped by a clamp, and the temperature is 65 ℃ after heating and curing for 4 hours.

4) Setting an optical fiber laser welding machine, wherein the energy is 0.15J, the power is 2W, the welding spot is 1mm directly, and the solidified lens cone is sealed along the edge by laser welding and is light-proof.

Thirdly, design of assembling method of adjusting device

Traditional adjusting device pins focusing ring and lens cone with the screw, when the eyepiece design requirement is meticulous light and handy, still need reduce the wall thickness of each part except that the lens diameter reduces, and the mode of using M0.5's meticulous screw locking to require meticulous manipulation of production workman and eyesight all to require highly this moment, consequently designs a guide rail buckle formula fixed knot and constructs as shown in figure 1.

3.1 the buckle 31 on the focusing ring, design the back taper type buckle 31 on the focusing ring, the shape is as shown in A in figure 1, design locating hole 11 on the eyepiece barrel that corresponds. The buckle 31 and the positioning hole 11 are reversely buckled in the positioning hole 11 by using the taper of the buckle 31, and the focusing ring 3 and the eyepiece inner cylinder 1 are fixedly connected.

3.2 the clamping groove 21 on the eyepiece outer barrel 2 is convenient for assembling the focusing ring 3 with the buckle 31 on the eyepiece outer barrel 2, and the length of the guide rail 22 is the adjustable length of the focusing ring 3. The catches 31 of the focus ring 3 enter the guide rails 22 along the catch grooves 21 through the connecting grooves 23 for focusing.

3.3 assembling method

Placing the eyepiece inner cylinder 1 into the eyepiece outer cylinder 2 (one end of the fourth lens 1-7 is used as the front end of the eyepiece inner cylinder 1 and inserted into the eyepiece outer cylinder 2 from the open end of the clamping groove 21), wherein the positioning hole 11 of the eyepiece inner cylinder 1 is positioned at the position corresponding to the guide rail 22, the ring 3 to be focused is sleeved on the eyepiece outer cylinder 2 through the clamping groove 21, when the buckle 31 reaches the bottom of the clamping groove 21, the focusing ring is rotated, the buckle 31 enters the guide rail 22 through the connecting groove 23, the position of the focusing ring 3 is finely adjusted, and the buckle 31 is clamped into the positioning hole 11;

example 2

As shown in fig. 4, a fiberscope eyepiece comprises the fiberscope eyepiece system described in embodiment 1, and specifically comprises an eyepiece sleeve 4, an eyepiece cover 5, a focusing hand wheel 6, a buckle 7, a buckle hand wheel 8, an eyepiece fixing rod 9, a tee joint 10 and an insertion portion 11, wherein the eyepiece sleeve 4 is connected with one end of the fiberscope eyepiece system (the end where a first combined lens 1-1 is located), the outer end of the eyepiece sleeve 4 is connected with the eyepiece cover 5, the buckle 7 is arranged at the other end of the fiberscope eyepiece system (the end where a fourth lens 1-7 is located), the other end of the fiberscope eyepiece system is connected with the tee joint 10 through the buckle hand wheel 8, and one of the other two openings of the tee joint 10 is connected with the insertion portion 11; the focusing hand wheel 6 is sleeved on the outer wall of the focusing ring 3 and rotates to drive the focusing ring 3 and the buckle 31 to move along the guide rail 22, so that the eyepiece inner barrel 1 is driven to move inside the eyepiece outer barrel 2, and the focusing purpose is realized.

The eyepiece generally includes the eyepiece cover, focusing hand wheel, ACMI interface etc. wherein the eyepiece cover generally is macromolecular material, and other structural component generally are metal material. The disinfection modes of the fiber endoscope generally comprise modes of chemical reagent soaking, ethylene oxide sterilization, low-temperature plasma sterilization and the like, during disinfection and sterilization, the integral eyepiece is integrally placed in a solution for cleaning and then sterilized, the cleaning solution comprises glutaraldehyde, peracetic acid, sodium hypochlorite and the like, the surface of the plastic eyepiece cover can be whitened after being soaked, and the plastic eyepiece cover can be easily embrittled after being soaked repeatedly, so that a split eyepiece is designed, as shown in fig. 4. The inserting part 11 entering the body is connected with the ACMI interface, the adjusting part is connected with the eyepiece cover 5 (as in the above section), the inserting part 11 is separated from the eyepiece only through the buckle 7 and the buckle hand wheel 8 during disinfection, then the eyepiece cover 5 and the focusing hand wheel 6 are detached, and the residual metal part eyepiece inner tube 1, the eyepiece outer tube 2 and the focusing ring 3 are disinfected.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An eyepiece system of a fiber endoscope is characterized by comprising an eyepiece inner cylinder (1), an eyepiece outer cylinder (2) and a focusing ring (3), wherein a lens group is arranged in the eyepiece inner cylinder (1), and a positioning hole (11) is formed in the surface of the eyepiece inner cylinder; the barrel body of the eyepiece outer barrel (2) is provided with a connecting groove (23) communicated with the clamping groove (21), the guide rail (22) and the connecting groove, the clamping groove (21) is opened along the front end of the barrel body, the guide rail (22) is closed along the front end of the barrel body, and the bottom ends of the clamping groove (21) and the guide rail (22) are communicated through the connecting groove (23); the inner wall of the focusing ring (3) is provided with a buckle (31) which protrudes inwards; inside eyepiece urceolus (2) was located in eyepiece inner tube (1), focusing ring (3) cover in eyepiece urceolus (2) outer wall, and buckle (31) are located guide rail (22) to insert in locating hole (11), focusing ring (3) can drive eyepiece inner tube (1) and remove in eyepiece urceolus (2) inside.

2. A fiber endoscope eyepiece system according to claim 1, wherein the eyepiece inner barrel (1) comprises an upper lens barrel (12) and a lower lens barrel (13), the inner walls of the upper lens barrel (12) and the lower lens barrel (13) are provided with corresponding slots for placing the lenses of the lens group, and the upper lens barrel (12) and the lower lens barrel (13) are sealed and fixed together to form the eyepiece inner barrel (1).

3. The eyepiece lens system of the fiber endoscope of claim 1, wherein the lens group in the eyepiece inner tube (1) comprises a first combined lens (1-1), a first lens (1-2), a second lens (1-3), a second combined lens (1-4), a third combined lens (1-5), a third lens (1-6) and a fourth lens (1-7) arranged in this order.

4. A fiber endoscope eyepiece system according to claim 3, wherein the first combined lens (1-1), the second combined lens (1-4) and the third combined lens (1-5) are all formed by combining a positive lens and a negative lens, and the other lenses are all plano lenses; particularly, the fourth lens (1-7) is positioned at the front end of the eyepiece inner cylinder (1).

5. The fiberscope eyepiece system according to claim 1, wherein the slot (21) and the guide rail (22) are parallel to a central axis of the eyepiece outer barrel (2), and the attachment slot (23) is perpendicular to the slot (21) and the guide rail (22).

6. A fiber endoscope eyepiece system according to claim 1, characterized in that the catch (31) is an inverted cone type catch.

7. The fiber endoscope eyepiece system of claim 1, wherein the lens inner cylinder (1), the eyepiece outer cylinder (2) and the focusing ring (3) are all made of metal.

8. A fiber endoscope eyepiece system according to claim 1, characterized in that the clasp (31) is made by cutting the focus ring 3 to form a groove 32, leaving a part of the cut section bent.

9. A fiber endoscope eyepiece comprising the fiber endoscope eyepiece system of any of claims 1-8.

10. The eyepiece of the fiber endoscope of claim 9, which comprises an eyepiece sleeve (4), an eyepiece cover (5), a focusing hand wheel (6), a buckle (7) and a buckle hand wheel (8), wherein the eyepiece sleeve (4) is connected with one end of the eyepiece system of the fiber endoscope, the outer end of the eyepiece sleeve (4) is connected with the eyepiece cover (5), the other end of the eyepiece system of the fiber endoscope is provided with the buckle (7), and the buckle hand wheel (8) is connected with the buckle (7); the focusing hand wheel (6) is sleeved on the outer wall of the focusing ring (3) and drives the focusing ring (3) to move through self rotation; further, the device also comprises an eyepiece fixing rod (9).