CN219306649U - Endoscope head part and endoscope - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, and provides an endoscopic lens end piece, an endoscope and a head end body; the utility model discloses a tool for the medical equipment, including the head end body, the distal end of the head end body is equipped with the apparatus passageway hole, the proximal end of the head end body is equipped with the pincers way pipe pilot hole, the apparatus passageway hole with pincers way pipe pilot hole axial intercommunication, the radial internal dimension of pincers way pipe pilot hole is greater than the radial internal dimension of apparatus passageway hole, the axis of the head end body is first axis, the axis of pincers way pipe pilot hole is the second axis, the second axis with the first axis is the contained angle setting, and by the distal end of the head end body is to the proximal end, the second axis is close to gradually the first axis. According to the utility model, the second axis forms an included angle with the first axis, so that the outer diameter of the head end body is effectively reduced under the condition that the sizes of the instrument channel hole and the forceps channel tube assembly hole are unchanged.

Description

Endoscope head part and endoscope

Technical Field

The utility model relates to the technical field of medical equipment, in particular to an endoscope head end piece and an endoscope.

Background

Medical endoscopes are used as a common instrument in medical surgery for viewing, diagnosing and imaging body cavities and organs of the human body, and providing a field of view for physicians.

The outer diameter size of the insertion portion of the endoscope has a direct correlation with comfort and postoperative complications. For example, when the large-size internal medicine thoracoscope is used, the endoscope is needed to be re-inserted by a scalpel incision, the small-size puncture sheath can be used for expanding the endoscope, the wound is small, and the complications can be improved.

The external dimension of the insertion part of the endoscope is mainly determined by a head end structure, and the head end structure is mainly composed of parts such as a head end piece, a light source, a CMOS (complementary metal oxide semiconductor) and a clamp pipe; wherein the light source, the CMOS and the clamp tube are all mounted in the head end piece, so that the size of the head end piece is limited by the sizes of the clamp tube and the CMOS;

the CMOS mounting holes for mounting CMOS and the clamp mounting holes for mounting the clamp pipe are formed in the existing head end piece, the central axes of the CMOS mounting holes and the clamp mounting holes are generally parallel to the central axis of the head end piece, the head end piece needs to be large in size based on the consideration of machining and manufacturing and local structural strength of the head end piece, the wall thickness between all openings and the wall thickness between the inner wall of each opening and the outer wall of the head end piece meet the requirements, and the arrangement mode causes insufficient space utilization rate of the head end piece and large size of the head end piece.

Disclosure of Invention

The utility model aims to provide an endoscope head part and an endoscope, which are beneficial to improving the space utilization rate of the head part by changing the arrangement mode of CMOS mounting holes and forceps channel mounting holes, so that the size of the head part is reduced under the condition that the existing sizes of the CMOS mounting holes and forceps channel mounting holes are unchanged.

The present utility model provides an endoscopic lens end piece comprising: a head end body;

the utility model discloses a tool for the medical equipment, including the head end body, the distal end of the head end body is equipped with the apparatus passageway hole, the proximal end of the head end body is equipped with the pincers way pipe pilot hole, the apparatus passageway hole with pincers way pipe pilot hole axial intercommunication, the radial internal dimension of pincers way pipe pilot hole is greater than the radial internal dimension of apparatus passageway hole, the axis of the head end body is first axis, the axis of pincers way pipe pilot hole is the second axis, the second axis with the first axis is the contained angle setting, and by the distal end of the head end body is to the proximal end, the second axis is close to gradually the first axis.

Optionally, the distal end of the head end body is further provided with a CMOS mounting hole, the proximal end of the head end body is further provided with a threading hole, the CMOS mounting hole is axially communicated with the threading hole, the radial inner dimension of the CMOS mounting hole is greater than the radial inner dimension of the threading hole, the central axis of the CMOS mounting hole is a third axis, the central axis of the threading hole is a fourth axis, the fourth axis and the second axis are respectively located at two radial sides of the first axis, the fourth axis and the first axis are arranged at an included angle, and the distal end of the head end body is toward the proximal end, and the fourth axis is gradually far away from the first axis.

Optionally, the fourth axis is parallel to the second axis, and/or the first axis, the second axis, the third axis, and the fourth axis are coplanar.

Optionally, the head end body is further provided with a beam hole, the beam hole penetrates from the proximal end to the distal end of the head end body, the proximal end of the head end body is provided with a guiding surface, and the guiding surface is used for guiding a beam to penetrate into the beam hole.

Optionally, the guiding surface is curved and surrounds a proximal end of the beam aperture.

Optionally, the proximal end of the head end body is divided into a low area and a high area along the radial direction, and the high area protrudes along the axial proximal direction and is higher than the low area; the proximal end of the beam hole penetrates to the lower region, and the radial side wall of the upper region is provided with a curved surface to form the guide surface.

Optionally, the proximal end of the forceps tube assembly hole penetrates to the high area, and the proximal end of the threading hole penetrates to the low area.

Optionally, the head end body is divided into an implantation part and an assembly part from the distal end to the proximal end, the outer diameter of the implantation part is larger than that of the assembly part, and an annular assembly boss extending along the circumferential direction is arranged at the axial middle position of the assembly part.

Optionally, the outer diameter of the implant portion tapers from the proximal end to the distal end.

The embodiment also provides an endoscope, wherein the endoscope is provided with the endoscope lens end piece.

In summary, the endoscope head end member provided by the present utility model includes: a head end body; the utility model discloses a tool for the medical equipment, including the head end body, the distal end of the head end body is equipped with the apparatus passageway hole, the proximal end of the head end body is equipped with the pincers way pipe pilot hole, the apparatus passageway hole with pincers way pipe pilot hole axial intercommunication, the radial internal dimension of pincers way pipe pilot hole is greater than the radial internal dimension of apparatus passageway hole, the axis of the head end body is first axis, the axis of pincers way pipe pilot hole is the second axis, the second axis with the first axis is the contained angle setting, and by the distal end of the head end body is to the proximal end, the second axis is close to gradually the first axis.

So dispose, be the mode of setting up of contained angle through second axis b relative first axis a for under the unchangeable circumstances of apparatus passageway hole and clamp way pipe pilot hole size, effectively reduce the external diameter size of the head end body, and then effectively improve the space utilization of the head end body itself, on the one hand can reduce the required wound of endoscope implantation through reducing the size of the head end body, reduce the probability of complication, on the other hand, the improvement of this structure also does benefit to and makes the head end body keep the wall thickness of each position to accord with minimum wall thickness requirement under the less size, and convenient injection moulding is also favorable to improving the local structural strength of the head end body.

Drawings

FIG. 1 is a schematic perspective view of an endoscopic lens end piece according to an embodiment of the present utility model;

FIG. 2 is a schematic side view of an endoscopic lens end piece according to an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of an endoscopic lens end piece according to an embodiment of the present utility model;

FIG. 4 is a schematic perspective view of a second embodiment of an endoscopic lens end piece according to the present utility model;

fig. 5 is a schematic view of the endoscope structure of the present utility model.

Wherein, the reference numerals are as follows:

10-a head end body; 101-an implant; 102-a fitting part; 1021-remote zone; 1022-near zone; 103-low region; 104-high region;

11-instrument channel aperture; 12-a clamp pipe assembly hole; 13-CMOS mounting holes; 131-square sinking grooves; 14-threading holes; 15-assembling a boss; 16-a beam aperture; 17-a guide surface;

20-snake bone;

30-CMOS；

40-beam;

50-forceps tube;

a 60-CMOS signal line;

a-a first axis; b-a second axis; c-a third axis; d-a fourth axis; an angle between the α -first axis and the second axis; an angle between the beta-fourth axis and the first axis; wall thickness dimension at the L-a point location.

Detailed Description

The present utility model is described in further detail below with reference to the attached drawings and the detailed description. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model.

In the present utility model, the "radially inner dimension" and the "radially outer dimension" correspond to the diameter dimension for a circular structure, and for a non-circular structure, the radially inner dimension refers to the diameter of its inscribed circle, and the radially outer dimension refers to the diameter of its circumscribed circle; "axial" corresponds to the direction in which the axis is located for a cylindrical structure, and axial corresponds to the length of the structure for a non-cylindrical structure;

in the present utility model, "proximal" and "distal" are relative orientations, relative positions, directions of elements or actions relative to one another from the perspective of an operator using the product, although "proximal" and "distal" are not limiting, "proximal" generally refers to an end of the product that is adjacent to the operator during normal operation, and "distal" generally refers to an end that first enters the patient.

In the present utility model, the definition of parallel and vertical should not be interpreted as being in a narrow sense as an absolute vertical or an absolute parallel relationship, and should be interpreted as allowing an error of a set angle, for example, the set angle is usually ±5°, and a specific numerical value of the set angle is determined according to a required use condition, on the premise of corresponding vertical or parallel;

as used in this disclosure, the singular forms "a," "an," and "the" include plural referents, the term "or" are generally used in the sense of comprising "and/or" and the term "several" are generally used in the sense of comprising "at least one," the term "at least two" are generally used in the sense of comprising "two or more," and the term "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance or number of features indicated. Thus, a feature defining "a first", "a second", "a third" may include one or at least two such features, either explicitly or implicitly. Furthermore, as used in this disclosure, "mounted," "connected," and "disposed" with respect to another element should be construed broadly to mean generally only that there is a connection, coupling, mating or transmitting relationship between the two elements, and that there may be a direct connection, coupling, mating or transmitting relationship between the two elements or indirectly through intervening elements, and that no spatial relationship between the two elements is to be understood or implied, i.e., that an element may be in any orientation, such as internal, external, above, below, or to one side, of the other element unless the context clearly dictates otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, directional terms, such as above, below, upper, lower, upward, downward, left, right, etc., are used with respect to the exemplary embodiments as they are shown in the drawings, upward or upward toward the top of the corresponding drawing, downward or downward toward the bottom of the corresponding drawing.

Referring to fig. 1, this embodiment provides an endoscopic lens end piece,Includeda head end body 10;

the distal end of the head end body is provided with an instrument channel hole 11, the proximal end of the head end body is provided with a forceps channel pipe assembly hole 12, the instrument channel hole 11 is axially communicated with the forceps channel pipe assembly hole 12, the radial inner dimension of the forceps channel pipe assembly hole 12 is larger than that of the instrument channel hole 11, the central axis of the head end body 10 is a first axis, the central axis of the forceps channel pipe assembly hole 12 is a second axis, the second axis and the first axis are arranged at an included angle, and the distal end of the head end body 10 is close to the proximal end gradually.

Wherein, the central axis of the instrument channel hole 11 and the central axis of the forceps channel tube assembly hole 12 can be provided with proper included angles according to the actual structure. Preferably, the instrument channel hole 11 and the forceps tube assembly hole 12 are coaxially arranged, and in this embodiment, the instrument channel hole 11 and the forceps tube assembly hole 12 are coaxially arranged, that is, the central axis shared by the instrument channel hole 11 and the forceps tube assembly hole 12 is the second axis.

In this embodiment, when the through hole is a circular hole, the central axis is the center line thereof, and when the through hole is a non-circular hole, the central axis corresponds to the connecting line of the centers of inscribed circles of each radial section of the through hole.

In this embodiment, both the axial and radial directions are referenced to the head end body 10.

Referring to fig. 1 to 3, the distal end of the head end body 10 is further provided with a CMOS mounting hole 13, the proximal end of the head end body 10 is further provided with a threading hole 14, and the head end body may be made of metal, hard plastic, ceramic, or the like; the CMOS mounting hole 13 is used for mounting CMOS, CMOS is usually in a square structure, so the distal end opening of the CMOS mounting hole 13 is provided with a square countersink 131, and the side of the square countersink 131 is larger than the radial inner dimension of other parts of the CMOS mounting hole 13, as shown in fig. 1, the right angle position of the square countersink 131 is at least thick from the outer circular surface of the head end body 10, the size of the square countersink 131 is adapted to the dimension of CMOS, the passage of an implanted instrument is required to be satisfied by the instrument channel hole 11, when the dimensions of the square countersink 131 and the instrument channel hole 11 are determined, the optimal arrangement position of the square countersink 131 and the instrument channel hole 11 is determined, and the center of the radial connecting distal end surface between the geometric center of the square countersink 131 and the center of the instrument channel hole 11 is the optimal layout, so that the self space of the head end body 10 can be maximally utilized.

The forceps channel tube assembly hole 12 is used for being assembled with the forceps channel tube 50, the inner diameter of the forceps channel tube is generally the same as the inner diameter of the instrument channel hole 11, and after the forceps channel tube 50 is inserted into the forceps channel tube assembly hole 12, the inner cavity of the forceps channel tube 50 is in conformal butt joint with the instrument channel hole 11 to form a complete channel. As shown in fig. 3, on the distal end face of the head end body 10, the center position of the instrument channel hole 11 is preferentially determined, so that the central axis b, which is the central axis in common with the instrument channel hole 11 and the forceps tube mounting hole 12, is inclined relative to the first axis a of the head end body 10 itself, wherein the wall thickness L at the position a of the proximal end port of the forceps tube mounting hole 12 is the smallest from the outer circumferential surface of the head end body 10, so that the smallest dimension of the wall thickness L determines the smallest outer diameter dimension of the head end body 10, and due to the inclined arrangement of the second axis b in the present embodiment, the proximal end of the channel formed by the instrument channel hole 11 and the forceps tube mounting hole 12 swings in the direction approaching the first axis a (swings rightward in fig. 3) with the central point at the distal end face of the head end body 10 as a reference, so that the dimension of the wall thickness L is effectively enlarged, and thus the outer diameter dimension requirement of the head end body 10 becomes smaller; if the second axis b is arranged in a conventional manner, that is, the second axis b is arranged parallel to the first axis a, it is necessary to swing the proximal end of the channel formed by the instrument channel hole 11 and the forceps tube mounting hole 12 in a direction away from the first axis a (to the left in fig. 3) with reference to the center point at the distal end surface of the head end body 10 on the basis of fig. 3, and the wall thickness L becomes smaller or even negative, and at this time, it is necessary to adaptively increase the outer diameter of the head end body 10 to ensure that the dimension of the wall thickness L satisfies the requirements.

Through the setting mode that second axis b is the contained angle relative to first axis a for under the unchangeable circumstances of apparatus passageway hole 11 and clamp pipe pilot hole 12 size, effectively reduce the external diameter size of the head end body 10, and then effectively improve the space utilization of the head end body 10 itself, on the one hand can reduce the required wound of endoscope implantation through reducing the size of the head end body 10, reduce the incidence of complication, on the other hand, the improvement of this structure also does benefit to and makes the head end body 10 accord with minimum wall thickness requirement in each position under keeping less size, and convenient injection moulding also is favorable to improving the local structural strength of the head end body 10.

With continued reference to fig. 3, the CMOS mounting hole 13 is axially communicated with the threading hole 14, a radial inner dimension of the CMOS mounting hole 13 is greater than a radial inner dimension of the threading hole 14, a central axis of the CMOS mounting hole 13 is a third axis, a central axis of the threading hole 14 is a fourth axis, the third axis, the fourth axis and the second axis are located at two radial sides of the first axis, the third axis is parallel to the first axis, the fourth axis and the first axis are disposed at an included angle, and the fourth axis is gradually far away from the first axis from a distal end to a proximal end of the head end body 10.

The channel formed by the instrument channel hole 11 and the clamp pipe assembly hole 12 and the channel formed by the CMOS mounting hole 13 and the threading hole 14 are arranged along the radial direction of the head end body 10, corresponding to the illustration in fig. 3, the third axis c and the fourth axis d are positioned on the right side of the first axis a, the second axis b is positioned on the left side of the first axis a, and the clamp pipe assembly hole 12 has a larger inner diameter and is obliquely arranged to occupy part of the space of the head end body 10 to the right, so that the threading hole 14 adaptively reduces the radial inner dimension, the radial inner dimension of the threading hole 14 is smaller than the radial inner dimension of the CMOS mounting hole 13, and meanwhile, the threading hole 14 is enabled to be led to the right side by the inclination of the fourth axis d, so that the wall thickness between the threading hole 14 and the clamp pipe assembly hole 12 meets the requirement, the requirement of the threading hole 14 on the radial inner dimension is smaller than the CMOS mounting hole 13, and the threading hole 14 is provided with the smaller radial inner dimension to meet the use requirement.

In this embodiment, the opening shapes of the instrument channel hole 11, the forceps channel tube mounting hole 12, the CMOS mounting hole 13 and the threading hole 14 are not limited, and in order to fit with other existing components, the instrument channel hole 11 and the forceps channel tube mounting hole 12 are provided as circular holes, the distal end of the CMOS mounting hole 13 is provided as a square hole, the other positions of the CMOS mounting hole 13 are changed to circular holes, and the threading hole 14 is provided as an elliptical hole.

In this embodiment, the included angle α between the first axis a and the second axis and the included angle β between the fourth axis d and the first axis a are not limited, and preferably the included angle α and the included angle β are 2-5 °, and in this embodiment, the fourth axis is parallel to the second axis. The included angle alpha and included angle beta are equal, preferably 2 deg., in such a way that the plier tube assembly hole 12 and the threading hole 14 are parallel such that the wall thickness therebetween is substantially uniform.

Further, the first axis, the second axis, the third axis, and the fourth axis are coplanar. In this embodiment, each axis is a straight line, and the layout mode maximizes the space utilization of the head end body 10.

Further, the proximal end of the head end body 10 is divided into a low region 103 and a high region 104 in the radial direction, the high region protruding in the axial proximal direction and being higher than the low region 103.

The area occupied by the low area 103 and the high area 104 is not limited, as shown in fig. 4 and fig. 5, the area of the high area 104 is larger than that of the low area 103, the low area 103 and the high area 104 are respectively in a semicircular structure in the axial projection direction, and the axial projection surfaces of the low area 103 and the high area 104 are combined into a complete circle; the proximal end of the head end body 10 needs to be assembled into the snake bone 20, and the partition structure of the head end body 10 enables the head end body to be inserted into the snake bone 20, and the high area 104 to enter the snake bone 20 and then the low area to be assembled into the snake bone 20, so that the head end body 10 and the snake bone 20 can be assembled.

The head end body 10 is further provided with a beam hole 16, the beam hole 16 penetrates from the proximal end to the distal end of the head end body 10, and the proximal end of the head end body 10 is provided with a guiding surface 17 for guiding a light beam to penetrate into the beam hole 16.

In this embodiment, the number of the beam holes 16 is not limited, as shown in fig. 4, two beam holes 16 are arranged in parallel in the circular hole of the beam hole 16, and the two beam holes 16 are respectively arranged at two sides of the threading hole 14; in addition, the structure of the guiding surface 17 is not limited herein, for example, it may be a curved surface or a plane, and the guiding surface may be parallel to the central axis of the beam hole 16 or may be disposed at an angle with respect to the central axis of the beam hole 16, where the guiding surface 17 is disposed to facilitate guiding the light beam into the beam hole 16, so as to facilitate assembling the head end body 10.

Further, referring to fig. 4, the guiding surface 17 is parallel to the central axis of the beam hole 16, and the guiding surface 17 is curved and semi-surrounds the proximal end of the beam hole 16. The guiding surface 17 may be attached to the edge of the proximal end of the beam hole 16 or may leave a small gap; the proximal end of the beam hole 16 penetrates into the lower region 103, and the radial side wall of the upper region 104 has a curved surface to form the guide surface 17. The guiding surface 17 is in an arc surface structure, the surrounding central angle of the guiding surface 17 to the near end opening of the beam hole 16 is an acute angle, the beam can be attached to the guiding surface 17 in the penetrating process so as to be guided into the beam hole 16, the beam hole 16 is arranged in the low area 103, and the guiding surface 17 is naturally formed by utilizing the side wall of the high area 104, so that the structure is simplified; the beam 40 is typically an optical fiber, and the guide surface 17 of the structure facilitates guiding the beam 40 axially therethrough and prevents the beam 40 from being broken.

In addition, for the purpose of reasonable layout, the proximal end of the forceps tube assembly hole 12 is penetrated to the high area 104, and the proximal end of the threading hole 14 is penetrated to the low area 103.

The embodiment also provides an endoscope, wherein the endoscope is provided with the endoscope lens end piece.

Referring to fig. 5, the endoscope further includes a snake bone 20, a CMOS30, a light beam 40, a forceps channel tube 50, a CMOS signal line 60, and other components, wherein the forceps channel tube 50 is disposed in the snake bone 20, the distal end of the forceps channel tube 50 is sleeved in the forceps channel tube assembly hole 12 and is abutted to the proximal end of the instrument channel hole 11, the forceps channel tube 50 can be connected and sealed with the inner wall of the forceps channel tube assembly hole 12 in an adhesive manner, the CMOS30 is mounted in a square sink 131, the CMOS signal line 60 passes from the inside of the snake bone 20 through the threading hole 14 into the CMOS mounting hole 13 to be electrically connected with the CMOS30, the light beam 40 passes from the inside of the snake bone 20 through the light beam hole 16 to the distal end of the head end body 10, the light beam 40 is preferably an optical fiber for conducting light to the distal end of the head end body 10, and the distal end of the light beam hole 16 can be provided with a lens for light beam divergence.

Referring to fig. 4 and 5, the head end body 10 is divided into an implant portion 101 and an assembly portion 102 from a distal end to a proximal end, the outer diameter of the implant portion 101 is larger than that of the assembly portion 102, and an annular assembly boss 15 extending along a circumferential direction is provided at an axial middle position of the assembly portion 102; the outer diameter of the implant 101 is gradually reduced from the proximal end to the distal end so as to facilitate the implantation of the implant into the wound.

Referring to fig. 4, the assembling portion 102 is axially divided into a distal region 1021 and a proximal region 1022 by the assembling boss 15, wherein the proximal region 1022 is inserted into the distal end of the snake bone 20, the distal end of the snake bone 20 is automatically positioned against the assembling boss 15, then the distal region 1021 is sleeved with a rubber tube, and then the distal region 1021 is tied with a wire and glued to ensure good sealing performance; the overall layout structure of the endoscope is the same as the existing structure, except for the improvement of the head and end pieces, which are not described here again.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The above description is only illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.

Claims (10)

1. An endoscopic lens end piece, comprising: a head end body;

the utility model discloses a tool for the medical equipment, including the head end body, the distal end of the head end body is equipped with the apparatus passageway hole, the proximal end of the head end body is equipped with the pincers way pipe pilot hole, the apparatus passageway hole with pincers way pipe pilot hole axial intercommunication, the radial internal dimension of pincers way pipe pilot hole is greater than the radial internal dimension of apparatus passageway hole, the axis of the head end body is first axis, the axis of pincers way pipe pilot hole is the second axis, the second axis with the first axis is the contained angle setting, and by the distal end of the head end body is to the proximal end, the second axis is close to gradually the first axis.

2. The endoscopic lens end piece according to claim 1, wherein said distal end of said head body is further provided with a CMOS mounting hole, said proximal end of said head body is further provided with a threading hole, said CMOS mounting hole is in axial communication with said threading hole, a radial inner dimension of said CMOS mounting hole is greater than a radial inner dimension of said threading hole, a central axis of said CMOS mounting hole is a third axis, a central axis of said threading hole is a fourth axis, said fourth axis and said second axis are disposed on respective radial sides of said first axis, said fourth axis is disposed at an angle to said first axis and is disposed from said distal end of said head body to said proximal end, said fourth axis being progressively farther from said first axis.

3. The endoscope lens end piece of claim 2, wherein the fourth axis is parallel to the second axis and/or the first axis, the second axis, the third axis, and the fourth axis are coplanar.

4. The endoscope head as defined in claim 2 wherein the head body further has a beam aperture therethrough from a proximal end to a distal end of the head body, the proximal end of the head body having a guide surface for guiding a light beam into the beam aperture.

5. The endoscope lens end member of claim 4, wherein the guide surface is curved and surrounds the proximal port of the beam aperture.

6. The endoscope lens end piece of claim 5 wherein the proximal end of the head body is divided in a radial direction into a low zone and a high zone, the high zone protruding axially proximally and being higher than the low zone; the proximal end of the beam hole penetrates to the lower region, and the radial side wall of the upper region is provided with a curved surface to form the guide surface.

7. The endoscope lens tip of claim 6 wherein the proximal end of the forceps tube assembly bore extends through to the high section and the proximal end of the threading bore extends through to the low section.

8. The endoscope lens end member of claim 1, wherein the end body is divided from a distal end to a proximal end into an implant portion and a fitting portion, the implant portion having an outer diameter greater than an outer diameter of the fitting portion, the fitting portion having an annular fitting boss extending circumferentially at a central axial location.

9. The endoscope lens end member of claim 8, wherein the outer diameter of the implant portion tapers from the proximal end to the distal end.

10. An endoscope, characterized in that it is fitted with an endoscope head piece according to any one of claims 1 to 9.

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