CN117398039A - Endoscope sheath assembly and method of installing same - Google Patents

Abstract

The invention discloses an endoscope sheath assembly and an installation method thereof, which belong to the technical field of endoscope production, wherein the endoscope sheath assembly comprises: connecting pipe, fixation nut, wedge clamping ring, external pressure ring, sheath fixing base and sheath body. The outer pressure ring compresses tightly solid grease and sealing washer on the face of operating portion shell, can scribble sufficient glue in sheath fixing base surface, second recess and the annular appearance gluey inslot for the leakproofness is better between this endoscope sheath subassembly and the operating portion. When the endoscope needs to be maintained, the sheath fixing seat and the sheath body do not need to be detached, and the sheath fixing seat can protect the sheath body and avoid stress damage in the sheath body detaching process. And in the maintenance process, the connecting wire is not required to be disconnected, and the outer pressing ring and the sheath fixing seat can be restored to the active state by only melting glue smeared between all parts, so that the pressing state of the outer pressing ring on the upper cover plate of the outer casing of the operation part can be relieved, and the upper cover plate of the outer casing of the operation part is moved to maintain the inside of the operation part.

Description

Endoscope sheath assembly and method of installing same

Technical Field

The invention relates to the technical field of endoscope production, in particular to an endoscope sheath assembly and an installation method thereof.

Background

An endoscope system is widely used in the medical industry and generally comprises an insertion part, an operation part, an image processing device/light source device and a display device; the operation unit is generally connected to an image processing device and a light source device via a connection line, the image processing device supplies a control signal and/or processing of an image signal to the endoscope, and the light source device supplies a light source to the endoscope.

In the existing endoscope design scheme, one end of a connecting wire is connected to the inside of an operation part through an opening on the operation part, and the other end of the connecting wire is provided with a plug which can be matched and connected with a socket on an image processing device/a light source device; in order to ensure that the connection wire connected with one end of the operation part is not easily broken and damaged by external force and seal the opening, a connecting pipe and a sheath are generally designed, one end of the connecting pipe is fixed on the operation part, the other end of the connecting pipe protrudes outside the operation part, the connecting wire penetrates through the central pipe of the connecting pipe, and the inside of the sheath is coated with glue to wrap the protruding connecting pipe and a small section of connecting wire. However, the structure has the problem of uneven adhesive, the sealing effect is unstable, and the edge of the sheath is easy to be damaged when the sheath is reworked/maintained and stripped; if the sheath is damaged, the sheath can be replaced only after the connecting wire is detached from the inside of the operation part, and the workload is high.

Disclosure of Invention

The invention aims to at least solve one of the technical problems in the prior art, and therefore, the invention provides an endoscope sheath assembly and an installation method thereof, which can provide better structural tightness, prevent the sheath from being damaged during maintenance, avoid disconnecting a connecting wire and are convenient to assemble and disassemble.

An endoscope sheath assembly according to an embodiment of the first aspect of the present invention is for sealing connection of an operation portion of an endoscope and a connection wire including a connection wire core and a connection wire outer sheath, comprising: the connecting component is arranged along the axis of the connecting wire, the connecting component is arranged in the operating part in a penetrating way, one end of the connecting component is connected with the connecting wire outer leather sheath, and the other end of the connecting component is connected with the fixed support in the operating part; the outer pressing ring is arranged along the axial direction of the connecting line, the outer pressing ring is covered on the operating part, a second internal threaded hole is formed in the outer pressing ring along the axis, a first groove is formed in the end face, far away from the operating part, of the outer pressing ring, a second groove is formed in the end face, close to the operating part, of the outer pressing ring, a sealing ring is arranged in the second groove, and the outer pressing ring is in threaded connection with one end, far away from the operating part, of the connecting component through the second internal threaded hole; the sheath fixing seat is arranged along the axial direction of the connecting wire, a first step hole, a second step hole and a third step hole are sequentially formed in the sheath fixing seat from bottom to top along the axis, the aperture of the first step hole, the aperture of the second step hole and the aperture of the third step hole are sequentially reduced, threads are arranged on the inner side of the second step hole, a shrinkage part is arranged at the upper end of the sheath fixing seat, a second flange part is arranged at the lower end of the sheath fixing seat, an annular glue containing groove and a first clamping part are arranged between the shrinkage part and the second flange part, the sheath fixing seat is in threaded connection with one end, far away from the operation part, of the connecting assembly through the threads on the inner side of the second step hole, and the second flange part can be embedded into a first groove of the outer pressing ring; the sheath body is arranged along the axial direction of the connecting wire, the sheath body is sleeved outside the sheath fixing seat, an inclined plane and a second clamping portion are arranged inside the sheath body, and the sheath body is fixed on the sheath fixing seat through the cooperation of the first clamping portion and the second clamping portion.

An endoscope sheath assembly according to an embodiment of the first aspect of the present invention has at least the following advantageous effects: the outer pressure ring compresses tightly solid grease and sealing washer on the face of operating portion shell, can scribble sufficient glue in sheath fixing base surface, second recess and the annular appearance gluey inslot for the leakproofness is better between this endoscope sheath subassembly and the operating portion. When the endoscope needs to be maintained, the sheath fixing seat and the sheath body do not need to be detached, and the sheath fixing seat can protect the edge of the sheath body and avoid the damage of the sheath body. And in the maintenance process, the connecting wire is not required to be disconnected, and only glue between the connecting pipe, the connecting wire, the outer pressing ring and the sheath fixing seat is required to be melted, so that the outer pressing ring and the sheath fixing seat are in a movable state, the outer pressing ring, the sheath body and the sheath fixing seat slide upwards along the connecting wire, the pressing state of the upper cover plate of the outer shell of the operation part can be relieved, and the upper cover plate of the outer shell of the operation part is moved to maintain the inner part of the operation part.

According to some embodiments of the invention, the connecting pipe is arranged along the axial direction of the connecting wire, the connecting pipe comprises a smooth surface section and a thread section, the outer diameter of the smooth surface section is larger than the outer diameter of the thread section, a first internal thread hole is formed in the center of the smooth surface section along the axial direction, a horn hole is formed in the center of the thread section along the axial direction, the horn hole is gradually narrowed from one end close to the first internal thread hole to one end far away from the first internal thread hole, a circular ring platform is arranged at the intersection of the first internal thread hole and the horn hole, a plurality of thread holes are formed in the end surface of the smooth surface section far away from the thread section, and the thread holes are uniformly distributed along the circumferential direction of the smooth surface section; the fastener is arranged along the axial direction of the connecting wire, the fastener is arranged inside the connecting pipe, and the fastener is used for tightly pressing the connecting wire outer leather sheath on the inner wall of the horn hole.

According to some embodiments of the invention, a fastener includes: the fixing nut is arranged along the axial direction of the connecting line, a through hole is formed in the fixing nut along the axis, and threads matched with the first internal thread holes are formed on the outer side surface of the fixing nut; the wedge-shaped pressing ring is axially arranged along the connecting line, a through hole is formed in the wedge-shaped pressing ring along the axis, a first flange part is arranged at one end of the wedge-shaped pressing ring, the outer side face of the wedge-shaped pressing ring is gradually narrowed from one end close to the first flange part to one end far away from the first flange part, and the inclination angle of the outer side face of the wedge-shaped pressing ring is the same as that of the horn hole of the connecting pipe; the wedge-shaped compression ring is arranged in the horn hole of the connecting pipe, the first flange part can be propped against the circular ring platform of the connecting pipe, the fixing nut is in threaded connection with the first internal threaded hole of the connecting pipe, and the connecting wire outer leather sheath is clamped between the wedge-shaped compression ring and the horn hole.

According to some embodiments of the invention, the outer pressure ring and the sheath body are made of non-metal.

According to some embodiments of the invention, the first groove and the second groove of the outer pressure ring are annular grooves, and the end face of the outer pressure ring far away from the operation part is further provided with an installation operation groove.

According to some embodiments of the invention, the junction of the third stepped hole and the second stepped hole and the junction of the third stepped hole and the adjacent end face are provided with arc transition parts.

A method of installing an endoscope sheath assembly according to an embodiment of a second aspect of the present invention includes:

step 1: installing a sealing ring in a second groove of the outer pressing ring to form a first assembly;

step 2: gluing the outer surface of the sheath fixing seat, clamping the sheath fixing seat into the sheath body through the first clamping part and the second clamping part, and forming a second assembly;

step 3: sleeving the second component, the first component, the connecting pipe, the wedge-shaped compression ring and the fixing nut on the connecting wire in sequence;

step 4: coating a glue on the thread section of the connecting pipe, coating solid grease on the end surface of the outer pressing ring, which is close to the operation part, and the sealing ring, and then screwing the outer pressing ring onto the thread section until the outer pressing ring presses the upper cover plate of the outer shell of the operation part;

step 5: the second component is screwed onto the connecting pipe through the internal thread of the second step hole, the second component compresses the external compression ring after being installed in place, and the lower ends of the second flange part and the sheath body are embedded into the first groove;

step 6: fixing the connecting wire sheath between the connecting pipe and the wedge-shaped compression ring;

step 7: fixing the connecting pipe to the fixed bracket inside the operation part through the bolt connection threaded hole;

step 8: and (3) turning over one end, far away from the operation part, of the sheath body, and turning over the sheath body to the original state after gluing on the turning-over surface.

According to some embodiments of the invention, installing the sheath mount within the sheath body includes: the sheath fixing seat is sleeved from the lower end of the sheath body, the outer inclined surface of the shrinkage part of the sheath fixing seat is attached to the inclined surface of the inner cavity of the sheath, the second clamping part is embedded into the first clamping part, and the lower end of the sheath body is close to the second flange part.

According to some embodiments of the invention, in step 4, mounting the outer pressure ring onto the threaded section comprises: and installing a sealing ring in the second groove, and screwing the outer pressing ring onto the threaded section of the connecting pipe.

According to some embodiments of the present invention, in step 6, the connection wire outer sheath is sleeved on the outer inclined surface of the wedge-shaped compression ring, the connection wire core extends out from the through hole in the center of the wedge-shaped compression ring, and then the fixing nut is screwed into the first internal threaded hole of the connection pipe to compress and fix the wedge-shaped compression ring, and the first flange portion approaches/abuts against the annular platform, so that the wedge-shaped compression ring compresses the connection wire outer sheath on the horn hole.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic view of the structure of an endoscope sheath assembly of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a cross-sectional view of the connecting tube of FIG. 2;

FIG. 5 is a schematic view of the outer pressure ring of FIG. 2;

FIG. 6 is a cross-sectional view of the outer pressure ring of FIG. 2;

fig. 7 is a cross-sectional view of the sheath holder and sheath body of fig. 2.

A connection pipe 100; a smooth surface section 110; a first internally threaded bore 111; a threaded section 120; a flare hole 121; a circular ring platform 130; a threaded hole 140;

a fixing nut 200;

a wedge-shaped press ring 300; a through hole 310; a first flange portion 320;

an outer press ring 400; a second internally threaded bore 410; a first groove 420; a second groove 430; a seal ring 440; a chamfer portion 450; a mounting operation groove 460;

the sheath fixing seat 500; a first stepped hole 510; a second stepped hole 520; a third stepped hole 530; a second flange portion 540; a first clamping portion 550; a circular arc transition 560; a reduced-diameter portion 570; glue holding tank 580;

a sheath body 600; a second clamping portion 610; a bevel 620;

an operation unit 1; a connecting wire core 2; and a connecting wire outer leather sheath 3.

Detailed Description

Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.

In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

An endoscope sheath assembly and a method of installing the same according to an embodiment of the present invention are described with reference to fig. 1 to 7.

As shown in fig. 1 to 7, an endoscope sheath assembly according to an embodiment of the present invention includes: the connecting pipe 100 is arranged along the axial direction of the connecting line, the connecting pipe 100 comprises a smooth surface section 110 and a thread section 120, the outer diameter of the smooth surface section 110 is larger than that of the thread section 120, a first internal thread hole 111 is formed in the center of the smooth surface section 110 along the axial direction, a horn hole 121 is formed in the center of the thread section 120 along the axial direction, the horn hole 121 is gradually narrowed from one end close to the first internal thread hole 111 to one end far away from the first internal thread hole 140, a circular ring platform 130 is arranged at the intersection of the first internal thread hole 111 and the horn hole 121, a plurality of thread holes 140 are formed in the end surface of the smooth surface section 110 far away from the thread section 120, and the plurality of thread holes 140 are uniformly distributed along the circumferential direction of the smooth surface section 110; the fixing nut 200 is arranged along the axial direction of the connecting line, the fixing nut 200 is provided with a through hole along the axis, and the outer side surface of the fixing nut 200 is provided with threads matched with the first internal thread hole 111; the wedge-shaped pressing ring 300 is arranged along the axial direction of the connecting line, a through hole 310 is formed in the wedge-shaped pressing ring 300 along the axis, a first flange part 320 is arranged at one end of the wedge-shaped pressing ring 300, the outer side surface of the wedge-shaped pressing ring 300 is gradually narrowed from one end close to the first flange part 320 to one end far away from the first flange part 320, and the inclination angle of the outer side surface of the wedge-shaped pressing ring 300 is the same as that of the horn hole 121 of the connecting pipe 100; the wedge-shaped press ring 300 is disposed in the bell mouth 121 of the connection pipe 100, the first flange 320 can abut against the annular platform 130 of the connection pipe 100, the fixing nut 200 is screwed with the first internal threaded hole 111 of the connection pipe 100, and the connection wire outer leather sheath 3 is clamped between the wedge-shaped press ring 300 and the bell mouth 121. The outer press ring 400 is arranged along the axial direction of the connecting line, the outer press ring 400 is covered on the operating part 1, a second internal threaded hole 410 is formed in the outer press ring 400 along the axis, a first groove 420 is formed in the end face, far away from the operating part 1, of the outer press ring 400, a second groove 430 is formed in the end face, close to the operating part 1, of the outer press ring 400, a sealing ring 440 is arranged in the second groove 430, and the outer press ring 400 is in threaded connection with the threaded section 120 through the second internal threaded hole 410; the sheath fixing seat 500 is arranged along the axial direction of the connecting line, the sheath fixing seat 500 is sequentially provided with a first step hole 510, a second step hole 520 and a third step hole 530 from bottom to top along the axis, the apertures of the first step hole 510, the second step hole 520 and the third step hole 530 are sequentially reduced, threads are arranged on the inner side of the second step hole 520, a necking part 570 is arranged at the upper end of the sheath fixing seat 500, a second flange part 540 is arranged at the lower end of the sheath fixing seat 500, an annular glue containing groove 580 and a first clamping part 550 are arranged between the necking part 570 and the second flange part 540, the sheath fixing seat 500 is in threaded connection with the thread section 120 through the threads on the inner side of the second step hole 520, and the second flange part 540 can be embedded into the first groove 420 of the outer pressure ring 400; the sheath body 600, sheath body 600 along the axial setting of connecting wire, sheath body 600 cover is established outside sheath fixing base 500, and sheath body 600 inside is provided with inclined plane 620 and second joint portion 610, and first joint portion 550 and second joint portion 610 cooperation are fixed sheath body 600 on sheath fixing base 500.

As shown in fig. 1 to 7, the upper end of the connection pipe 100 is a threaded section 120, the lower end is a smooth section 110, the smooth section 110 is fixed inside the operation part 1 of the endoscope by a bolt, a horn hole 121 with a narrow upper part and a wide lower part is formed inside the threaded section 120, a first internal threaded hole 111 is formed inside the smooth section 110, a circular ring platform 130 is arranged between the first internal threaded hole 111 and the horn hole 121, the lower end of the connection wire outer sheath 3 is clamped between the horn hole 121 and the wedge-shaped compression ring 300, a first flange part 320 at the lower end of the wedge-shaped compression ring 300 can abut against the circular ring platform 130, and then the fixing nut 200 is screwed into the first internal threaded hole 111 to compress the first flange part 320 on the circular ring platform 130, so that the connection wire outer sheath 3 is clamped and fixed.

The outer pressure ring 400 and the sheath fixing seat 500 are screwed on the thread section 120 of the connecting pipe 100 from bottom to top, the outer pressure ring 400 is made of nonmetal, and the upper end surface of the outer pressure ring 400 is provided with the installation operation groove 460. The outer pressure ring 400 is covered on the upper surface of the operation part 1, the outer pressure ring 400 and the operation part 1 are directly clamped with a sealing ring, and the sealing degree between the endoscope sheath assembly and the operation part 1 is ensured through the sealing ring. The sheath fixing seat 500 is made of metal, the sheath body 600 is made of nonmetal, the sheath fixing seat 500 is clamped with the sheath body 600 through the matching and clamping of the first clamping part 550 and the second clamping part 610, the upper cover plate of the outer shell of the operating part 1 is pressed and fixed through screwing the outer pressing ring 400 and the sheath fixing seat 500, and the second flange part 540 and the lower end of the sheath body 600 are embedded into the first groove 420 after being installed, so that no metal of the sheath assembly is exposed on the surface.

In some embodiments of the present application, the upper end surface of the outer press ring 400 is provided with a chamfer 450. The provision of the chamfer 450 reduces the sharp edges of the present assembly, helping to mitigate the risk of damaging the edges of the part.

In some embodiments of the present application, the intersection of the third stepped bore 530 and the second stepped bore 520, and the intersection of the third stepped bore 530 and the adjacent end face are provided with a rounded transition 560. The arc transition portion 560 can effectively prevent the connecting line from being scratched.

The method for installing the endoscope sheath assembly according to the embodiment of the second aspect of the present invention comprises:

step 1: fitting the seal ring 440 into the second groove 430 of the outer press ring 400 to form a first assembly;

step 2: the outer surface of the sheath fixing seat 500 is coated with glue, and the sheath fixing seat 500 is sleeved from the lower end of the sheath body 600 through the clamping connection of the first clamping connection part 550 and the second clamping connection part 610, the outer inclined surface of the shrinkage part 570 of the sheath fixing seat 500 is attached to the inclined surface 620 of the sheath inner cavity, the second clamping connection part 610 is embedded into the first clamping connection part 550, and the lower end of the sheath body 600 is close to the second flange part 540, so that a second assembly is formed;

step 3: sleeving the second component, the first component, the connecting pipe 100, the wedge-shaped compression ring 300 and the fixing nut 200 on the connecting wire in sequence;

step 4: coating the glue on the threaded section 120 of the connecting pipe 100, coating solid grease on the end face of the outer pressure ring 400 close to the operating part 1 and the sealing ring 440, installing the sealing ring 440 in the second groove 430, and screwing the outer pressure ring 400 onto the threaded section 120 of the connecting pipe until the outer pressure ring 400 presses the upper cover plate of the operating part shell;

step 5: the second assembly is screwed to the connection pipe 100 through the internal thread of the second stepped hole 520, and is pressed against the outer pressing ring 400 after being installed in place, and the second flange part 540 and the lower end of the sheathing body 600 are both embedded into the first groove 420;

step 6: fixing the connecting wire sheath between the connecting pipe 100 and the wedge-shaped pressing ring 300, sleeving the connecting wire outer leather sheath 3 on the outer inclined surface of the wedge-shaped pressing ring 300, extending the connecting wire core 2 from the through hole 310 in the center of the wedge-shaped pressing ring 300, screwing the fixing nut 200 into the first internal threaded hole 111 of the connecting pipe 100 to tightly press and fix the wedge-shaped pressing ring 300, and enabling the first flange part 320 to approach/abut against the annular platform 130, wherein the wedge-shaped pressing ring 300 tightly presses the connecting wire outer leather sheath 3 on the horn hole 121;

step 7: the connection pipe 100 is fixed to the fixing bracket inside the operation part 1 through the bolting screw hole 140;

step 8: one end of the sheath body 600, which is far away from the operation part, is folded, and the folded surface is glued and then folded back to the original state.

In the above-mentioned installation method, the material of the sheath body 600 uses elastic silica gel, and the shrinkage opening at the upper end of the sheath body 600 is in interference fit with the connecting wire. The glue used for adhesion between the sheath fixing seat 500 and the sheath body 600 is hard glue, the glue used for adhesion between the sheath body 600 and the connecting wire is RTV glue, and the glue coated on the thread section 120 of the connecting pipe 100 is RTV glue or thread glue; the lower end surface of the seal ring 440 and the outer pressure ring 400 is coated with solid grease as lubricating grease.

In summary, the solid grease and the sealing ring 440 are used on the surface of the outer pressing ring 400 pressing the outer casing of the operation part 1, and enough glue can be coated on the surface of the sheath fixing seat 500 and in the second groove 430, so that the sealing performance between the endoscope sheath assembly and the operation part 1 is better. When the endoscope needs to be maintained, the sheath fixing seat 500 and the sheath body 600 do not need to be detached, and the sheath fixing seat 500 can protect the edge of the sheath body 600 and avoid the sheath body 600 from being damaged. And in the maintenance process, the connecting wire is not required to be disconnected, and only glue between the connecting pipe 100, the connecting wire, the outer pressing ring 400 and the sheath fixing seat 500 is required to be melted, so that the outer pressing ring 400 and the sheath fixing seat 500 are restored to the active state, and the outer pressing ring 400, the sheath body 600 and the sheath fixing seat 500 slide upwards along the connecting wire, so that the pressing state of the outer pressing ring 400 on the upper cover plate of the outer shell of the operation part 1 can be relieved, the upper cover plate of the outer shell of the operation part 1 is moved, and the inside of the operation part 1 is maintained. And because the outer shell, the outer compression ring 400 and the sheath body 600 which are exposed at the external operation part 1 are all nonmetallic parts, the product can pass electromagnetic compatibility test, and the appearance is more attractive.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims (10)

1. An endoscope sheath assembly for sealing connection of an operating portion (1) of an endoscope and a connecting wire, the connecting wire comprising a connecting wire core (2) and a connecting wire outer sheath (3), characterized by comprising:

the connecting component is arranged along the axis of the connecting wire, the connecting component is arranged in the operating part in a penetrating way, one end of the connecting component is connected with the connecting wire outer leather sheath, and the other end of the connecting component is connected with the fixed support in the operating part;

the outer pressing ring (400) is arranged along the axial direction of the connecting line, the outer pressing ring (400) is covered on the operating part (1), a second internal threaded hole (410) is formed in the outer pressing ring (400) along the axis, a first groove (420) is formed in the end face, far away from the operating part, of the outer pressing ring (400), a second groove (430) is formed in the end face, close to the operating part, of the outer pressing ring (400), a sealing ring (440) is arranged in the second groove (430), and the outer pressing ring (400) is in threaded connection with one end, far away from the operating part, of the connecting assembly through the second internal threaded hole (410);

the sheath fixing seat (500), sheath fixing seat (500) along the axial setting of connecting wire, sheath fixing seat (500) has seted up first step hole (510) along the axle center from bottom to top in proper order, second step hole (520) and third step hole (530), the aperture in first step hole (510), second step hole (520) and third step hole (530) diminishes in proper order, second step hole (520) inboard is provided with the screw thread, sheath fixing seat (500) upper end is provided with pinch portion (570), sheath fixing seat (500) lower extreme is provided with second flange portion (540), be provided with annular appearance gluey groove (580) and first joint portion (550) between pinch portion (570) and second flange portion (540), sheath fixing seat (500) through the screw thread in second step hole (520) inboard with the one end spiro union that the coupling assembling kept away from operating portion (1), second flange portion (540) can imbeds in first recess (420) of outer clamping ring (400);

sheath body (600), sheath body (600) set up along the axial of connecting wire, sheath body (600) cover is established outside sheath fixing base (500), and sheath body (600) inside is provided with inclined plane (620) and second joint portion (610), and first joint portion (550) are fixed sheath body (600) on sheath fixing base (500) with second joint portion (610) cooperation.

2. The endoscope sheath assembly of claim 1, wherein the connection assembly comprises:

the connecting pipe (100), connecting pipe (100) are along the axial setting of connecting wire, connecting pipe (100) include plain noodles section (110) and screw thread section (120), the external diameter of plain noodles section (110) is greater than the external diameter of screw thread section (120), first internal thread hole (111) have been seted up along the axial in plain noodles section (110) center, loudspeaker hole (121) have been seted up along the axial in screw thread section (120) center, loudspeaker hole (121) are from being close to the one end of first internal thread hole (111) towards keeping away from the one end of first internal thread hole (111) narrowing gradually, the intersection department of first internal thread hole (111) and loudspeaker hole (121) is provided with ring platform (130), be provided with a plurality of screw holes (140) on the terminal surface that screw thread section (120) were kept away from to plain noodles section (110), a plurality of screw holes (140) are along the circumference equipartition of plain noodles section (110);

the fastener is arranged along the axial direction of the connecting wire, the fastener is arranged inside the connecting pipe, and the fastener is used for tightly pressing the connecting wire outer leather sheath (3) on the inner wall of the horn hole (121).

3. The endoscope sheath assembly of claim 2, wherein the fastener comprises:

the fixing nut (200) is arranged along the axial direction of the connecting line, a through hole is formed in the fixing nut (200) along the axis, and threads matched with the first internal thread hole (111) are formed on the outer side surface of the fixing nut (200);

the wedge-shaped pressing ring (300), the wedge-shaped pressing ring (300) is arranged along the axial direction of the connecting line, a through hole (310) is formed in the wedge-shaped pressing ring (300) along the axis, a first flange part (320) is arranged at one end of the wedge-shaped pressing ring (300), the outer side face of the wedge-shaped pressing ring (300) is gradually narrowed from one end close to the first flange part (320) to one end far away from the first flange part (320), and the inclination angle of the outer side face of the wedge-shaped pressing ring (300) is the same as that of a horn hole (121) of the connecting pipe (100);

the wedge-shaped pressing ring (300) is arranged in the horn hole (121) of the connecting pipe (100), the first flange part (320) can be abutted against the annular platform (130) of the connecting pipe (100), the fixing nut (200) is in threaded connection with the first internal threaded hole (111) of the connecting pipe (100), and the connecting wire outer leather sheath (3) is clamped between the wedge-shaped pressing ring (300) and the horn hole (121).

4. The endoscope sheath assembly of claim 1, wherein the outer pressure ring (400) and the sheath body (600) are made of non-metal.

5. The endoscope sheath assembly according to claim 1, characterized in that the first groove (420) and the second groove (430) of the outer pressure ring (400) are annular grooves, and that an installation operation groove (460) is further provided on the end surface of the outer pressure ring (400) remote from the operation portion (1).

6. The endoscope sheath assembly of claim 1, wherein a circular arc transition (560) is provided at the intersection of the third stepped bore (530) and the second stepped bore (520) and at the intersection of the third stepped bore (530) and the adjacent end face.

7. A method of installing an endoscope sheath assembly according to claim 3, the method comprising:

step 1: installing a sealing ring (440) into a second groove (430) of the outer pressure ring (400) to form a first assembly;

step 2: gluing the outer surface of the sheath fixing seat (500), and clamping the sheath fixing seat (500) into the sheath body (600) through the first clamping part (550) and the second clamping part (610) to form a second assembly;

step 3: the second component, the first component, the connecting pipe (100), the wedge-shaped compression ring (300) and the fixing nut (200) are sleeved on the connecting wire in sequence;

step 4: coating glue on the threaded section (120) of the connecting pipe (100), coating solid grease on the end face, close to the operation part (1), of the outer pressing ring (400) and the sealing ring (440), and then screwing the outer pressing ring (400) onto the threaded section (120) until the outer pressing ring (400) presses the upper cover plate of the outer shell of the operation part;

step 5: the second component is screwed onto the connecting pipe (100) through the internal threads of the second step hole (520), after being installed in place, the second component compresses the outer compression ring (400), and the lower ends of the second flange part (540) and the sheath body (600) are embedded into the first groove (420);

step 6: fixing the connecting wire sheath between the connecting tube (100) and the wedge-shaped compression ring (300);

step 7: the connecting pipe (100) is fixed on the fixed bracket inside the operation part (1) through the bolt connecting threaded hole (140);

step 8: one end of the sheath body (600) far away from the operation part is folded, and the sheath body is folded back to the original state after being coated with glue on the folding surface.

8. The method of installing an endoscope sheath assembly of claim 7, wherein in step 2, installing a sheath mount (500) into a sheath body (600) comprises: the sheath fixing seat (500) is sleeved from the lower end of the sheath body (600), the outer inclined surface of the shrinkage part (570) of the sheath fixing seat (500) is attached to the inclined surface (620) of the sheath inner cavity, the second clamping part (610) is embedded into the first clamping part (550), and the lower end of the sheath body (600) is close to the second flange part (540).

9. The method of installing an endoscope sheath assembly of claim 7, wherein in step 4, installing an external compression ring (400) onto the threaded section (120) includes: a sealing ring (440) is arranged in the second groove (430), and the outer pressure ring (400) is screwed on the threaded section (120) of the connecting pipe.

10. The method of installing an endoscope sheath assembly according to claim 7, wherein in step 6, the connection wire sheath (3) is sleeved on the outer inclined surface of the wedge-shaped pressing ring (300), the connection wire core (2) extends out from the through hole (310) in the center of the wedge-shaped pressing ring (300), the fixing nut (200) is screwed into the first internal threaded hole (111) of the connection pipe (100) to press the fixing wedge-shaped pressing ring (300), the first flange portion (320) approaches/abuts against the annular platform (130), and the wedge-shaped pressing ring (300) presses the connection wire sheath (3) on the horn hole (121).