CN219422760U - Endoscope with a lens - Google Patents

Abstract

An endoscope is disclosed. The endoscope comprises a connecting tube, a rod lens assembly and an eyepiece assembly. A connecting hole is formed in the connecting cylinder in a penetrating manner in the axial direction; the rod lens assembly comprises a rod lens barrel and a rod lens main body which are coaxially arranged, the rod lens main body is arranged in the rod lens barrel in a penetrating mode, and the rod lens barrel is inserted into the first end of the connecting hole and is coaxially arranged with the connecting hole; the eyepiece assembly comprises an eyepiece barrel and an eyepiece body which are coaxially arranged, the eyepiece body is arranged in the eyepiece barrel, and the eyepiece barrel is inserted into a second end, opposite to the first end, of the connecting hole and is coaxially arranged with the connecting hole. The endoscope and the medical equipment can at least solve the problems of poor coaxiality and poor imaging quality of an endoscope rod lens assembly and an eyepiece assembly in the prior art.

Description

Endoscope with a lens

Technical Field

The application relates to the technical field of medical instruments, in particular to an endoscope.

Background

The rapid development of medical technology and medical equipment has led to the wide application of endoscopes in the medical field, so that the requirements of the industry on endoscopes are also increasing. An electronic endoscope is a common medical instrument and consists of a light guide beam structure and a group of lenses. The endoscope enters the human body through a natural duct of the human body or through a small incision, and is used for the examination and the operation treatment of human organs or tissues through the external imaging of equipment. The operation is performed by means of an endoscope, compared with the traditional open operation, the operation has smaller wound and short recovery time of a patient, and is favored by the patient and doctors clinically.

In the prior art, the endoscope comprises a fixed sleeve, a rod lens assembly, a first connecting sleeve, a second connecting sleeve and an eyepiece assembly. The fixed sleeve is sleeved on the periphery of the rod mirror assembly, one end of the second connecting sleeve is sleeved on the periphery of the rod mirror assembly, and the other end of the second connecting sleeve is sleeved on the periphery of the eyepiece assembly. In order to ensure the imaging quality of the whole endoscope, the coaxiality of the fixing sleeve, the rod lens assembly, the first connecting sleeve, the second connecting sleeve and the eyepiece assembly is required to be ensured in the use process. In order to adjust the coaxiality of the fixed sleeve, the rod lens assembly, the first connecting sleeve, the second connecting sleeve and the eyepiece assembly, the endoscope is provided with a plurality of jackscrews on the periphery of the fixed sleeve, the periphery of the first connecting sleeve and the periphery of the second connecting sleeve respectively to resist the first connecting sleeve, the second connecting sleeve and the eyepiece assembly. This structure has at least the following drawbacks:

(1) The position of the second connecting sleeve is adjusted by adopting a plurality of jackscrews, the jackscrews are screwed in and out to push the axis of the ocular lens to deviate, but the coaxiality requirement of the optical system is high, and the optical system is generally in the micron level. In actual operation, the jackscrews need to be repeatedly screwed in and out within a tiny range, and more than 6 jackscrews need to be controlled at the same time, so that the optimal position is difficult to obtain, and the assembling process is difficult;

(2) The second connecting sleeve of the prior proposal is connected with other structural members through the second connecting sleeve. If the fixing sleeve is inclined during assembly, the optical coaxiality cannot be ensured no matter how the fixing sleeve is adjusted later. And is limited by the size of the previous step parts and the assembly precision, and the influence is more serious after multiple accumulations.

Disclosure of Invention

The main object of the present application is to provide an endoscope, so as to at least solve the problems of poor coaxiality and poor imaging quality of an endoscope rod lens assembly and an eyepiece assembly in the prior art.

According to one aspect of embodiments of the present application, there is provided an endoscope including:

the connecting cylinder is provided with a connecting hole in a penetrating way in the axial direction;

the rod mirror assembly comprises a rod lens barrel and a rod mirror main body which are coaxially arranged, the rod mirror main body is arranged in the rod lens barrel in a penetrating mode, and the rod lens barrel is inserted into the first end of the connecting hole and is coaxially arranged with the connecting hole;

the eyepiece assembly comprises an eyepiece barrel and an eyepiece main body which are coaxially arranged, the eyepiece main body is arranged in the eyepiece barrel, and the eyepiece barrel is inserted into a second end, opposite to the first end, of the connecting hole and is coaxially arranged with the connecting hole.

Further, the eye tube is connected to the second end of the connection hole through a connection portion and is reciprocally movable in the axial direction of the connection hole.

Further, the connecting part comprises an internal thread arranged on the inner wall surface of the connecting hole and an external thread arranged on the periphery of the eye lens barrel; or,

the connecting portion comprises a sliding groove and a sliding block which are matched with each other, the sliding groove and the sliding block extend along the axial direction of the connecting hole, one of the sliding groove and the sliding block is arranged on the inner wall surface of the connecting hole, and the other sliding groove and the sliding block are arranged on the peripheral side wall of the eye lens barrel.

Further, the connecting portion includes an internal thread provided on an inner wall surface of the connecting hole and an external thread provided on an outer peripheral side wall of the eyepiece barrel;

a first limiting step is arranged on the inner wall surface of the connecting hole and is positioned at one side of the internal thread far away from the rod mirror assembly;

the outer peripheral side wall of the eyepiece barrel is provided with a second limiting step, and the second limiting step is positioned at one side of the external thread far away from the rod lens assembly.

Further, the inner wall surface of the connecting hole is provided with an annular inner flange, the annular inner flange is surrounded to form a positioning hole coaxially arranged with the connecting hole, and the rod lens barrel is fixedly installed in the positioning hole in a fastening, bonding or interference fit mode.

Further, an annular outer flange is arranged at one end of the rod lens barrel, which is far away from the ocular lens assembly;

the endoscope further comprises an elastic element, the elastic element is sleeved on the periphery of the rod lens barrel, and two ends of the elastic element respectively prop against the annular outer flange and the annular inner flange.

Further, the elastic element includes at least one of a spring and an elastic pad.

Further, the endoscope further comprises a protective sleeve, wherein the protective sleeve is connected to the first end of the connecting cylinder and at least sleeved on the periphery of the rod lens main body.

Further, one end of the protective sleeve, which is close to the connecting cylinder, is fixed on the connecting cylinder through a pouring sealant layer.

Compared with the prior art, the technical scheme of the application has at least the following technical effects:

for the endoscope among the prior art, the endoscope in this application just sets up a connecting cylinder and just can link up stick mirror subassembly and eyepiece subassembly, and under the condition that the machining precision of connecting cylinder, stick mirror subassembly and eyepiece subassembly obtains guaranteeing, the axiality of connecting cylinder, stick mirror subassembly and the eyepiece subassembly of the endoscope after the equipment is high, need not to set up extra jackscrew and carries out axiality and adjust, simple structure, equipment is convenient, and manufacturing cost is lower, and the imaging quality is high.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a cross-sectional view of an endoscope disclosed in an embodiment of the present application;

FIG. 2 is a cross-sectional view of a portion of a connector barrel and eyepiece assembly of an endoscope disclosed in an embodiment of the present application;

fig. 3 is a cross-sectional view of a portion of a connector barrel and rod lens assembly of an endoscope disclosed in an embodiment of the present application.

Wherein the above figures include the following reference numerals:

10. a connecting cylinder; 11. a connection hole; 111. an internal thread; 112. a first limit step; 113. an annular inner flange; 20. a rod mirror assembly; 21. a rod lens barrel; 211. an annular outer flange; 22. a rod mirror body; 30. an eyepiece assembly; 31. a eyepiece barrel; 311. an external thread; 312. a second limit step; 32. an eyepiece body; 40. an elastic element; 50. and (5) a protective sleeve.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the authorization specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Referring to fig. 1 to 3, according to an embodiment of the present application, an endoscope is provided. The endoscope is used to view a cavity within a human body and includes an endoscope shaft and a proximal end (proximal to the user) for transmitting images from the distal end (distal to the viewer) to the proximal end. The endoscope rod is mainly a rod lens assembly 20, and the proximal end is an eyepiece assembly 30. Eyepiece assembly 30 is mounted above a predetermined structural member corresponding to rod lens assembly 20. The eyepiece assembly 30 tends to be coaxial and tilted with the front optical system, and the adjustment process is cumbersome and difficult, resulting in very poor imaging quality, subject to assembly process and product tolerances.

To this end, the present application provides a novel endoscope that includes a connecting tube 10, a rod mirror assembly 20, and an eyepiece assembly 30.

Wherein, the connecting cylinder 10 is provided with a connecting hole 11 in an axial direction in a penetrating way; the rod lens assembly 20 comprises a rod lens barrel 21 and a rod lens main body 22 which are coaxially arranged, wherein the rod lens main body 22 is arranged in the rod lens barrel 21 in a penetrating way, and the rod lens barrel 21 is inserted into the first end of the connecting hole 11 and is coaxially arranged with the connecting hole 11; the eyepiece assembly 30 includes an eyepiece barrel 31 and an eyepiece body 32 coaxially disposed, the eyepiece body 32 being disposed within the eyepiece barrel 31, the eyepiece barrel 31 being inserted at a second end of the connection hole 11 opposite the first end and coaxially disposed with the connection hole 11.

In the actual production process of the endoscope, as long as the machining coaxiality of the rod lens barrel 21 and the rod lens main body 22 of the rod lens assembly 20, the machining coaxiality of the eye lens barrel 31 and the eye lens main body 32 of the eye lens assembly 30, and the coaxiality of the axial direction of the connecting hole 11 are ensured, after the rod lens assembly 20 and the eye lens assembly 30 are assembled on the connecting barrel 10, the rod lens assembly 20, the eye lens assembly 30 and the connecting hole 11 can realize high-precision coaxial arrangement, and necessary structural assurance can be provided for realizing high-quality imaging for the endoscope.

Compared with the endoscope in the prior art, the endoscope in the embodiment can connect the rod lens assembly 20 and the eyepiece assembly 30 by only arranging one connecting cylinder 10, and under the condition that the machining precision of the connecting cylinder 10, the rod lens assembly 20 and the eyepiece assembly 30 is guaranteed, the coaxiality of the connecting cylinder 10, the rod lens assembly 20 and the eyepiece assembly 30 of the endoscope after being assembled is extremely high, no additional jackscrew is required to be arranged for coaxiality adjustment, and the endoscope has the advantages of simple structure, convenience in assembly, lower production and manufacturing cost and high imaging quality.

Specifically, the connecting tube 10 in this embodiment is a cylindrical tube structure, the connecting hole 11 is a circular hole, and the rod lens assembly 20 and the eyepiece assembly 30 are mounted on the connecting tube 10 from two ends of the connecting hole 11 during actual mounting, so that the structure is simple and the assembly is convenient. Of course, in other embodiments of the present application, the external structure of the connecting cylinder 10 may be an elliptic cylinder, a prismatic cylinder, or the like, and any other modification forms under the concept of the present application are within the scope of the present application.

Further, the eyepiece barrel 31 in the present embodiment is connected to the second end of the connection hole 11 by a connection portion and is reciprocatingly movable in the axial direction of the connection hole 11. That is, in the practical use process, the eyepiece barrel 31 in the present embodiment can reciprocate along the axial direction of the connection hole 11, and when the eyepiece barrel 31 reciprocates along the axial direction of the connection hole 11, the distance between the eyepiece body 32 and the rod lens body 22 can be adjusted, so that the endoscope reaches an optimal imaging state, and the imaging quality of the endoscope can be improved.

In order that the eyepiece barrel 31 can reciprocate in the axial direction of the connection hole 11, in one embodiment, a connection portion is provided as the female screw 111 and the male screw 311 that are mutually fitted, specifically, the connection portion includes the female screw 111 provided on the inner wall surface of the connection hole 11 and the male screw 311 provided on the outer peripheral side wall of the eyepiece barrel 31. So set up, when needs to adjust the interval between eyepiece main part 32 and the stick mirror main part 22, only need apply the effect of external force in order to twine eyepiece barrel 31 to eyepiece barrel 31, just can drive whole eyepiece subassembly 30 along connecting hole 11's axial direction reciprocating motion. The embodiment has simple structure and convenient operation.

In other embodiments of the present application, the connecting portion may be configured in other structures, for example, the connecting portion includes a mutually-engaged slide groove (not shown in the drawings) and a slide block (not shown in the drawings), both of which extend along the axial direction of the connecting hole 11, one of the slide groove and the slide block is disposed on the inner wall surface of the connecting hole 11, and the other is disposed on the outer peripheral side wall of the eyepiece barrel 31. That is, when the slide groove is provided on the inner wall surface of the connection hole 11, the slider is provided on the outer peripheral side wall of the eye tube 31; when the slider is provided on the inner wall surface of the connection hole 11, the slide groove is provided on the outer peripheral side wall of the eyepiece barrel 31. When the adjustment of the interval between the eyepiece body 32 and the rod lens body 22 is required, it is only necessary to apply an external force to the eyepiece barrel 31 to pull the eyepiece barrel 31 to reciprocate in the axial direction of the connection hole 11. The embodiment has simple structure and convenient operation.

In actual processing, the sliding groove and the sliding block can be arranged in one way, or can be arranged in two ways, three ways or more than three ways. When the sliding grooves and the sliding blocks are arranged in two or more than two, the two or more than two sliding grooves and the sliding blocks are arranged along the circumferential direction of the connecting hole 11, so that the structure is uniform, stable and reliable.

Of course, in other embodiments of the present application, the connection portion may be provided as a rack assembly that can be pulled, and other modifications that are under the concept of the present application are all within the scope of the present application.

In addition, in order to facilitate the operation and control of the eyepiece barrel 31, in this embodiment, a driving motor or a driving cylinder may be further provided to drive the eyepiece barrel 31 to reciprocate along the axis direction of the connection hole 11, so long as other modifications under the concept of the present application are within the scope of the present application.

Referring again to fig. 1 to 3, in order to limit and control the movement stroke of the objective lens barrel 31, a first limit step 112 is provided on the inner wall surface of the connection hole 11 in the present embodiment, the first limit step 112 being located on the side of the internal thread 111 remote from the rod lens assembly 20; correspondingly, a second limiting step 312 is arranged on the outer peripheral side wall of the eyepiece barrel 31, and the second limiting step 312 is positioned on one side of the external thread 311 away from the rod lens assembly 20.

The distance between the eye lens barrel 31 and one side of the rod lens assembly 20 can be limited through the interaction of the first limiting step 112 and the second limiting step 312, so that friction loss caused by contact between the eye lens barrel 31 and the rod lens assembly 20 is avoided.

In other embodiments of the present application, the first limiting step 112 and the second limiting step 312 may also be configured as limiting protrusions, and other modifications are within the scope of the present application as long as they are other modifications under the concept of the present application.

In order to facilitate installation and positioning of the rod lens assembly 20, the inner wall surface of the connecting hole 11 in the embodiment is provided with an annular inner flange 113, and the annular inner flange 113 encloses a positioning hole coaxially arranged with the connecting hole 11, and when in actual installation, the rod lens barrel 21 is fixedly installed in the positioning hole in a fastening, bonding or interference fit manner, so that the rod lens barrel is simple in structure and convenient to assemble.

Further, the end of the rod barrel 21 remote from the eyepiece assembly 30 in the present embodiment is provided with an annular outer flange 211; the endoscope further comprises an elastic element 40, the elastic element 40 is sleeved on the periphery of the rod lens barrel 21, and two ends of the elastic element 40 respectively abut against the annular outer flange 211 and the annular inner flange 113. By the action of the elastic element 40, a certain buffering acting force can be provided between the rod lens barrel 21 and the connecting barrel 10, and the situations of explosion and the like caused by thermal expansion, cold contraction and the like of the endoscope in the process of disinfection and the like are avoided.

Optionally, the elastic element 40 in this embodiment includes at least one of a spring and an elastic pad, and has a simple structure and is convenient to implement.

Further, the endoscope in this embodiment further includes a protecting sleeve 50, and the protecting sleeve 50 is connected to the first end of the connecting tube 10 and is at least sleeved on the outer periphery of the rod lens main body 22, and by the action of the protecting sleeve 50, not only the rod lens main body 22 can be protected, but also the connecting tube 10 and the structure of the distal end of the endoscope can be conveniently connected and fixed together. Optionally, the protecting sleeve 50 in this embodiment is a metal sleeve, such as an aluminum, alloy, or other metal sleeve, which has high structural strength and can extend the service life of the endoscope.

Further, one end of the protective sleeve 50, which is close to the connecting cylinder 10, is fixed on the connecting cylinder 10 through a potting adhesive layer. Through the effect of this jar seal glue layer, not only can connect the lag 50 fixed on connecting cylinder 10, can also realize sealing connection, avoid outside dust etc. to get into the inside of endoscope, simple structure, stability is high.

Of course, in other embodiments of the present application, the protecting sleeve 50 may be fixedly connected to the connecting cylinder 10 by welding, screwing, clamping, screwing, or the like, and any other modification manner under the concept of the present application is within the scope of the present application.

From the above description, it can be known that: the present application directly achieves the goal of optically coaxial front rod lens assembly 20 and rear eyepiece assembly 30 by providing a connecting tube 10, which optically creates a system. The condition that the rear optical system is inclined and eccentric due to the inclination of a first connecting sleeve or other structural members similar to the background technology is completely avoided. The endoscope assembly process is simple, the mode is effective, and the efficiency is greatly improved. The endoscope reduces the assembly process difficulty on the basis of guaranteeing the optical performance, and solves the problem that an eyepiece in the endoscope is coaxial with front optics.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application.

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (9)

1. An endoscope, comprising:

a connecting cylinder (10), wherein a connecting hole (11) is arranged in the axial direction of the connecting cylinder (10) in a penetrating way;

the rod mirror assembly (20), the rod mirror assembly (20) comprises a rod lens barrel (21) and a rod mirror main body (22) which are coaxially arranged, the rod mirror main body (22) is arranged in the rod lens barrel (21) in a penetrating way, and the rod lens barrel (21) is inserted into the first end of the connecting hole (11) and is coaxially arranged with the connecting hole (11);

eyepiece subassembly (30), eyepiece subassembly (30) are including coaxial eyepiece barrel (31) and eyepiece main part (32) that set up, eyepiece main part (32) set up in eyepiece barrel (31), eyepiece barrel (31) are inserted and are established connecting hole (11) with the second end that first end is relative, and with connecting hole (11) coaxial setting.

2. An endoscope according to claim 1, wherein the eye tube (31) is connected to the second end of the connection hole (11) by a connection portion and is reciprocally movable in the axial direction of the connection hole (11).

3. The endoscope according to claim 2, wherein the connection portion includes an internal thread (111) provided on an inner wall surface of the connection hole (11) and an external thread (311) provided on an outer periphery of the eyepiece barrel (31); or,

the connecting portion comprises a sliding groove and a sliding block which are matched with each other, the sliding groove and the sliding block extend along the axial direction of the connecting hole (11), one of the sliding groove and the sliding block is arranged on the inner wall surface of the connecting hole (11), and the other sliding groove and the sliding block are arranged on the peripheral side wall of the eye lens barrel (31).

4. The endoscope according to claim 2, wherein the connecting portion includes an internal thread (111) provided on an inner wall surface of the connecting hole (11) and an external thread (311) provided on an outer peripheral side wall of the eyepiece barrel (31);

a first limiting step (112) is arranged on the inner wall surface of the connecting hole (11), and the first limiting step (112) is positioned at one side of the internal thread (111) far away from the rod mirror assembly (20);

the outer peripheral side wall of the eyepiece barrel (31) is provided with a second limiting step (312), and the second limiting step (312) is positioned on one side of the external thread (311) far away from the rod lens assembly (20).

5. An endoscope according to claim 1, characterized in that an inner wall surface of the connection hole (11) is provided with an annular inner flange (113), the annular inner flange (113) is enclosed to form a positioning hole coaxially arranged with the connection hole (11), and the rod lens barrel (21) is fixedly arranged in the positioning hole in a manner of buckling, bonding or interference fit.

6. An endoscope according to claim 5, characterized in that the end of the rod barrel (21) remote from the eyepiece assembly (30) is provided with an annular outer flange (211);

the endoscope further comprises an elastic element (40), the elastic element (40) is sleeved on the periphery of the rod lens barrel (21), and two ends of the elastic element (40) are respectively propped against the annular outer flange (211) and the annular inner flange (113).

7. The endoscope according to claim 6, wherein said resilient element (40) comprises at least one of a spring and a resilient pad.

8. The endoscope according to any one of claims 1 to 7, further comprising a protective sleeve (50), said protective sleeve (50) being connected to the first end of the connection tube (10) and being sleeved at least on the outer periphery of the rod scope body (22).

9. An endoscope according to claim 8, characterized in that the end of the protective sleeve (50) adjacent to the connecting cylinder (10) is fixed to the connecting cylinder (10) by means of a potting compound.