Telescopic protective sleeve used under endoscope and installation method of telescopic protective sleeve

Abstract

The invention relates to the technical field of medical instruments, in particular to a telescopic protective sleeve used under an endoscope and an installation method of the telescopic protective sleeve. The telescopic protective sleeve comprises a protective sleeve main body and an adjusting part, one end of the protective sleeve main body is provided with a duck tongue, and the other end is connected with the adjusting part; and under the control of the adjusting part, the protective sleeve main body can axially move relative to the endoscope so as to adjust the relative extension amount of the duck tongue and the front end of the endoscope. Axial sliding of the protective sleeve body is achieved through the lead screw pair and other structures so that the relative extension amount of the duck tongue can be changed, the protective sleeve can adapt to different anatomical positions without replacing the sleeve, the number of times of instrument replacement in an operation is reduced, the operation time is shortened, and the sealing structure can stabilize intraendoscopic perfusion pressure and avoid liquid backflow and pollution risks.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a telescopic protective sleeve used under an endoscope and a mounting method thereof. BACKGROUND

[0002] In the field of endoscopic minimally invasive surgery, with the continuous development of technology and the increasing application scenarios, the adaptability and functionality of surgical operations on related devices are put forward with higher requirements. Among them, the design rationality of the in-scope protective sleeve as a key auxiliary device in the surgical process directly affects the accuracy, safety and efficiency of the surgery.

[0003] At present, in the existing minimally invasive surgery that needs to be implemented with the help of an endoscope, most in-scope protective sleeves adopt a fixed duckbill length design. The core feature of this design is that the relative distance between the protective sleeve duckbill front section and the endoscope front wheel remains constant. However, there are individual differences in human anatomy, and the positions of bones or tissues of different populations are different. The fixed duckbill length design is difficult to effectively adapt to these differences, which brings many inconveniences to surgical operations. In the actual process of surgery, when encountering bones or tissues with a relatively shallow or deep position, the duckbill length of the protective sleeve cannot be adjusted, and it is difficult to fully play its due supporting role. This not only affects the clarity of the surgical field of view and the stability of the surgical operation, but also may limit the operation of surgical instruments due to insufficient support, thereby increasing the risk faced by patients during surgery, such as the incidence of complications such as tissue damage and bleeding.

[0004] In order to cope with the operation difficulties brought by different bone or tissue positions, some surgical teams choose to frequently replace endoscopic protective sleeves of different duckbill lengths during the operation. But this practice raises a series of new problems. First of all, frequent replacement of protective sleeves makes the surgical process more complicated, and medical staff need to spend extra time and effort to replace the instruments during the critical stage of the operation, which is extremely inconvenient and easy to distract attention, affecting the continuity and accuracy of the operation. Secondly, frequent replacement of instruments may pose unknown risks to patients, such as increasing the risk of infection, causing damage to surrounding tissues due to repeated operations, etc. More seriously, frequent replacement of protective sleeves will inevitably prolong the operation time. The prolongation of the operation time means that the patient needs to be in a state of anesthesia for a longer time, which greatly increases the anesthesia risk of the patient, such as respiratory depression, circulatory system fluctuation, etc. At the same time, the postoperative recovery difficulty will also increase accordingly, and the patient may need a longer hospitalization time and recovery period, which brings double burden to the patient in terms of body and economy. In addition, different lengths of protective sleeves also face challenges in management and storage. Hospitals need to allocate more storage space and special classification management system to ensure the accurate storage and timely use of protective sleeves of various lengths. This not only increases the operating cost of medical institutions, but also causes waste of resources, which does not conform to the development trend of efficient use of modern medical resources.

[0005] In view of the many disadvantages of the fixed duckbill length endoscopic protective sleeve described above, it is particularly urgent and important to develop an endoscopic protective sleeve with adjustable duckbill length, which promotes the innovation of protective sleeve technology in endoscopic minimally invasive surgery, and is a key link to realize the precision, efficiency and safety of the operation, which is of great significance to improve the level of medical service and improve the patient's experience. SUMMARY

[0006] The purpose of the present application is to provide a telescopic protective sleeve for use under an endoscope and a method for installing the same in order to solve at least one of the above technical problems.

[0007] The present application achieves the above-mentioned purposes by the following technical solutions: A telescopic protective sleeve for use under an endoscope, comprising: a protective sleeve body and an adjusting part; One end of the protective sleeve body is provided with a duckbill, and the other end is connected to the adjusting part; Under the control of the adjusting part, the protective sleeve body can move axially relative to the endoscope to adjust the relative extension amount of the duckbill and the front end of the endoscope.

[0008] Further, the adjusting part comprises: a head fixing ring, an adjusting knob and a limiting flange; The end of the protective sleeve body away from the duckbill is connected to the limiting flange; the protective sleeve body can slide axially relative to the limiting flange; The head fixing ring limits the relative position of the limiting flange and the adjusting knob; The adjusting knob is rotatably connected with the protective sleeve body, and the relative position of the protective sleeve body and the limiting flange is controlled by rotating the adjusting knob.

[0009] Further, the adjusting part further comprises a pin shaft; The protective sleeve body is provided with a limiting groove at one end axially away from the duckbill; The limiting flange is provided with pin shaft holes matching the limiting groove in position and number, and one end of the pin shaft penetrates the limiting groove and the pin shaft hole to limit and connect the limiting flange and the protective sleeve body.

[0010] Further, the groove width of the limiting groove, the inner diameter of the pin shaft hole, and the nominal diameter of the pin shaft are matched and adopt clearance fit.

[0011] Further, the limiting groove can be circumferentially provided with a plurality of limiting grooves along the protective sleeve body; The number of pin shaft holes and pin shafts matches the number of limiting grooves.

[0012] Further, the limiting flange is provided with a flange at the front end; the flange is axially clamped between the head fixing ring and the adjusting knob, so that the limiting flange is axially fixed relative to the head fixing ring.

[0013] Further, the adjusting part further comprises an adjusting block in a ring structure and a pin; The inner side of the adjusting block is fixedly connected with the outer part of the protective sleeve body, and the outer side is provided with external threads; The adjusting knob is hollow inside and the inner wall is provided with internal threads matching the external threads of the adjusting block; The rear end of the adjusting knob is circumferentially provided with a limiting groove inside, the front end of the head fixing ring is inserted into the limiting groove, and the limiting groove is rotatably connected with the head fixing ring; The outer wall of the adjusting knob is provided with a positioning hole, and the outer wall of the head fixing ring is provided with an annular positioning groove matching the positioning hole, and one end of the pin penetrates the positioning hole and the positioning groove inside the limiting groove to connect, so that the adjusting knob and the head fixing ring can only make axial rotation.

[0014] Further, a plurality of positioning holes are circumferentially and equally spaced on the outer wall of the adjusting knob, and the number of pins is consistent with the number of positioning holes.

[0015] Further, a circumferential front end sealing groove and a rear end sealing groove are provided along the inner side of the head fixing ring; The front end sealing groove is provided with a front end sealing ring, and the rear end sealing groove is provided with a rear end sealing ring. The inner side of the front end sealing ring elastically abuts against the adjusting knob, and the inner side of the rear end sealing ring elastically abuts against the protective sleeve body.

[0016] Further, when the telescopic protective sleeve is connected with the endoscope, the rear end sealing ring further elastically abuts against the outer wall of the insertion part of the endoscope, so as to realize the air-tight isolation between the endoscope and the protective sleeve.

[0017] A mounting method of a telescopic protective sleeve is used for assembling the telescopic protective sleeve for use under an endoscope as any one of the above, and the mounting method comprises the following steps: Inserting the protective sleeve body into the limiting flange, aligning the limiting groove on the protective sleeve body with the pin shaft hole on the limiting flange, and penetrating the pin shaft; Fixing the adjusting block at one end of the protective sleeve body away from the duck-bill; Connecting the head fixing ring coaxially with the limiting flange, and respectively loading the front end sealing ring and the rear end sealing ring into the front end sealing groove and the rear end sealing groove of the limiting flange; Aligning the limiting recess of the adjusting knob with the front end of the head fixing ring, and screwing in, so that the internal thread of the adjusting knob is engaged with the external thread of the adjusting block; Pressing the pin into the positioning hole of the adjusting knob and clamping into the annular positioning groove arranged on the outer wall of the head fixing ring; Inserting the assembled telescopic protective sleeve from the tail end of the endoscope, and rotating the adjusting knob to make the duck-bill axially telescopic.

[0018] The telescopic protective sleeve for use under an endoscope provided by the application has the following beneficial effects: The telescopic protective sleeve for use under an endoscope provided by the application brings great convenience to surgical operation. During the operation, medical staff can quickly and accurately control the extension length of the duck-bill of the in-scope protective sleeve by rotating the adjusting knob, so that the duck-bill perfectly fits different surgical scenes and tissue positions. This flexible adjustment method avoids the tedious adjustment caused by the inappropriate length of the protective sleeve, greatly reduces the operation time, improves the operation efficiency, and saves valuable treatment time for patients.

[0019] The telescopic protective sleeve provided by the application effectively solves the problem of needing to purchase multiple in-scope protective sleeves with duck-bills of different lengths. A single adjustable protective sleeve can meet various surgical needs, significantly reducing the types and quantities of medical instruments to be purchased, thereby reducing medical costs. Meanwhile, medical staff do not need to frequently replace protective sleeves of different specifications during the operation, further improving the convenience of use and making the operation process more smooth and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The schematic diagram of the telescopic protective sleeve for endoscopic use according to an embodiment of the present application; Figure 2 The partial enlarged sectional view of A in Figure 1 Figure 3 The application schematic diagram of the telescopic protective sleeve for endoscopic use according to an embodiment of the present application; Figure 4 The flow chart of the installation method of the telescopic protective sleeve according to an embodiment of the present application; 1, endoscope; 2, telescopic protective sleeve; 21, duckbill; 22, head fixing ring; 23, adjusting knob; 24, limiting flange; 25, pin shaft; 26, front end sealing ring; 27, rear end sealing ring; 28, adjusting block; 29, limiting groove; 30, pin; 31, limiting recess; 32, positioning groove. DETAILED DESCRIPTION

[0021] The present application will now be discussed with reference to example embodiments. It should be appreciated that the discussed embodiments are merely for the purpose of enabling those of ordinary skill in the art to better understand and thus implement the present application, and are not intended to imply any limitation of the scope of the present application.

[0022] As used herein, the term "includes" and its variants are to be read as open-ended terms that mean "includes, but is not limited to." The term "based on" is to be construed as "based at least in part on." The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment."

[0023] Embodiment one Figure 1 The schematic diagram of the telescopic protective sleeve for endoscopic use according to an embodiment of the present application; Figure 2 The partial enlarged sectional view of A in Figure 1 Figure 3 The application schematic diagram of the telescopic protective sleeve for endoscopic use according to an embodiment of the present application. As shown in Figures 1-3 The telescopic protective sleeve for endoscopic use according to an embodiment of the present application comprises a protective sleeve body and an adjusting part. The protective sleeve body is provided with a duckbill 21 at one end and connected with the adjusting part at the other end. Under the control of the adjusting part, the protective sleeve body can move axially relative to the endoscope 1 to adjust the relative extension amount of the duckbill 21 and the front end of the endoscope 1.

[0024] ​​In the embodiment, a telescopic protective sleeve used under an endoscope is provided, which is composed of a protective sleeve body and an adjusting part: the front end of the protective sleeve body is a duckbill 21, and the rear end is connected with the adjusting part; the adjusting part includes a limiting flange 24, a head fixing ring 22, an adjusting knob 23, an adjusting block 28 with external threads, a pin shaft 25, a front end sealing ring 26 and a rear end sealing ring 27. When assembled, the adjusting block 28 is fixedly connected to the outer wall of the tail end of the protective sleeve body, the external threads of the adjusting block 28 and the internal threads of the adjusting knob 23 form a screw pair; the limiting flange 24 is axially clamped between the head fixing ring 22 and the adjusting knob 23 through a flange, the pin shaft 25 passes through the flange pin shaft hole and extends into the axial limiting groove 29 of the protective sleeve body, so that the protective sleeve body can only slide axially and cannot rotate; the rear end sealing ring 27 in the head fixing ring 22 elastically abuts against the outer wall of the lens body after the sleeve is inserted into the endoscope 1, forming airtight isolation, and the front end sealing ring 26 elastically abuts against the inner peripheral wall of the adjusting knob 23, ensuring rotary sealing and providing a damping feel. When used, the adjusting knob 23 exposed at the tail end of the lens is rotated, the screw pair converts the rotary motion into the linear displacement of the adjusting block 28, thereby driving the protective sleeve body to axially slide in the endoscope channel, and the relative extension amount of the duckbill 21 and the head end of the endoscope 1 is changed in real time; the stroke is determined by the length of the limiting groove 29, different anatomical positions can be adapted without replacing the whole sleeve, the number of intraoperative instrument replacement is reduced, the operation time is shortened, and the sealing structure ensures the stability of the perfusion pressure in the lens, avoids liquid reflux and pollution risk.

[0025] The protective sleeve body axially slides to change the relative extension amount of the duckbill through the screw pair and other structures, different anatomical positions can be adapted without replacing the sleeve, the number of intraoperative instrument replacement is reduced, the operation time is shortened, and the sealing structure can stabilize the perfusion pressure in the lens, avoid liquid reflux and pollution risk.

[0026] According to an embodiment of the present application, the adjusting part includes: a head fixing ring 22, an adjusting knob 23 and a limiting flange 24. One end of the protective sleeve body, away from the duckbill 21, is connected with the limiting flange 24; the protective sleeve body can axially slide relative to the limiting flange 24; The head fixing ring 22 limits the relative position of the limiting flange 24 and the adjusting knob 23. The adjusting knob 23 is rotatably connected with the protective sleeve body, and the relative position of the protective sleeve body and the limiting flange 24 is controlled by rotating the adjusting knob 23.

[0027] In the embodiment, the adjusting part comprises a head fixing ring 22, an adjusting knob 23 and a limiting flange 24; the limiting flange 24 is slidably connected with an axial limiting groove 29 at the tail end of the protective sleeve body through a pin shaft 25, so that the protective sleeve body can axially slide relative to the limiting flange 24 and is prohibited from rotating; the flange at the front end of the limiting flange 24 is axially clamped between the head fixing ring 22 and the adjusting knob 23, so that the relative axial position of the limiting flange 24 and the adjusting knob 23 is defined by the head fixing ring 22; the adjusting knob 23 is threadedly connected with an adjusting block 28 fixed to the tail end of the protective sleeve body, forming a screw pair; when the adjusting knob 23 exposed at the tail end of the mirror is rotated, the screw pair converts the rotary motion into the linear displacement of the protective sleeve body, and then the extension amount of the duck bill 21 and the head end of the endoscope 1 is accurately changed.

[0028] The adjusting part of the present application converts the rotary motion of the adjusting knob into the linear displacement of the protective sleeve body through the cooperation of the components, and can accurately change the extension amount of the duck bill and the head end of the endoscope.

[0029] According to an embodiment of the present application, the adjusting part further comprises a pin shaft 25. The end of the protective sleeve body away from the duck bill 21 is provided with an axial limiting groove 29; The limiting flange 24 is provided with pin shaft holes matching the position and number of the limiting grooves 29, and one end of the pin shaft 25 penetrates the limiting groove 29 and the pin shaft hole to limit the connection between the limiting flange 24 and the protective sleeve body.

[0030] Preferably, the groove width of the limiting groove 29, the inner diameter of the pin shaft hole and the nominal diameter of the pin shaft 25 are matched and adopt a clearance fit.

[0031] Preferably, the limiting groove 29 can be circumferentially provided with a plurality of limiting grooves along the protective sleeve body. The number of pin shaft holes and pin shafts 25 matches the number of limiting grooves 29.

[0032] In the embodiment, the adjusting part is additionally provided with a pin shaft 25; one or more axial limiting grooves 29 are formed on the outer wall of the tail section of the protective sleeve body, and the same number of pin shaft holes are formed on the limiting flange 24 in the same circumferential position; the pin shaft 25 penetrates the pin shaft hole and is inserted into the limiting groove 29 in a clearance fit, so that the limiting flange 24 and the protective sleeve body form a sliding-limiting connection. The clearance fit (matching the groove width, hole diameter and nominal diameter of the pin shaft) not only ensures that the sleeve body can slide along the axial direction with low resistance, but also prevents the protective sleeve body from rotating around the shaft by the contact between the side wall of the pin shaft 25 and the groove wall, so that the rotary motion of the adjusting knob 23 can be reliably converted into the linear extension and contraction of the duck bill 21; when two or more groups of pin shafts-limiting grooves are arranged circumferentially, the load is evenly distributed, further reducing the risk of unilateral wear and ensuring smooth and non-stuck extension and contraction during the entire operation process.

[0033] The present application realizes the axial low-resistance sliding of the protective sleeve body and the anti-rotation by the clearance fit of the pin shaft and the limiting groove and the pin shaft hole, reliably converts the rotary motion into the linear extension and contraction, and reduces the wear risk by arranging multiple groups in the ring direction, thereby ensuring the stable extension and contraction without jamming.

[0034] According to an embodiment of the present application, the front end of the limiting flange 24 is provided with a flange; the flange is axially clamped between the head fixing ring 22 and the adjusting knob 23, so that the limiting flange 24 is axially fixed relative to the head fixing ring 22.

[0035] In the present embodiment, the front end of the limiting flange 24 is integrally formed with a radial flange, which is axially clamped between the end face of the head fixing ring 22 and the rear end face of the adjusting knob 23, forming a rigid positioning: the flange is constrained by the supporting surface of the head fixing ring 22 and the inner stepped surface of the adjusting knob 23 on both sides, which not only prevents the limiting flange 24 from slipping forward, but also limits its rear displacement through the reverse end face of the head fixing ring 22, thereby realizing the axial fixation of the limiting flange 24 relative to the head fixing ring 22; at the same time, the end-to-end contact of the flange can uniformly transmit the axial reaction force generated by the screw pair, avoid the pin shaft 25 from bearing additional bending moment, and ensure that the limiting reference of the protective sleeve body is always stable during the extension and contraction process, thereby improving the adjustment accuracy and the service life of the assembly.

[0036] The present application realizes the axial fixation of the limiting flange relative to the head fixing ring by the axial clamping of the limiting flange flange, can uniformly transmit the axial reaction force, avoid the pin shaft from bearing additional bending moment, stabilize the limiting reference, and improve the adjustment accuracy and the service life of the assembly.

[0037] According to an embodiment of the present application, the adjusting part further comprises: an adjusting block 28 in a ring structure, a pin 30; The inner side of the adjusting block 28 is fixedly connected with the outside of the protective sleeve body, and the outer side is provided with external threads; The adjusting knob 23 is hollow inside and the inner wall is provided with internal threads matched with the external threads of the adjusting block 28; The rear end inside of the adjusting knob 23 is circumferentially provided with a limiting groove 31, the front end of the head fixing ring 22 is inserted into the limiting groove 31, and the limiting groove 31 is rotationally connected with the head fixing ring 22. The outer wall of the adjusting knob 23 is provided with a positioning hole, the outer wall of the head fixing ring 22 is provided with an annular positioning groove 32 matched with the positioning hole, and one end of the pin 30 is connected with the positioning groove 32 inside the limiting groove 31 through the positioning hole, so that the adjusting knob 23 and the head fixing ring 22 can only do axial rotary motion.

[0038] Preferably, a plurality of positioning holes are circumferentially and equidistantly arranged on the outer wall of the adjusting knob 23, and the number of the pins 30 is consistent with the number of the positioning holes.

[0039] In the embodiment, the adjusting part is additionally provided with a ring-shaped adjusting block 28 and a pin 30. The inner periphery of the adjusting block 28 is fixed to the tail end of the protective sleeve body, and the outer periphery is provided with external threads, which are engaged with the internal threads of the adjusting knob 23 to form a screw pair. A limiting groove 31 is formed in the inner side of the rear end of the adjusting knob 23, and the front end of the head fixing ring 22 is inserted into the groove and forms a sliding bearing type rotary connection. The two are axially limited by the flange and cannot be separated. A plurality of positioning holes are uniformly distributed in the circumference of the knob, and the pin 30 passes through the positioning hole and falls into the annular positioning groove 32 of the head fixing ring 22, which circumferentially locks the knob in the ring groove, so that it can only rotate around the shaft and cannot axially move. When the adjusting knob 23 is rotated, the screw pair converts the rotary motion into the linear displacement of the adjusting block 28 and the protective sleeve body, realizing the stepless expansion and contraction of the duck bill 21. The multi-point pin load can reduce unilateral wear, ensure smooth rotation and accurate expansion and contraction, and at the same time retain the ability of quick disassembly and maintenance.

[0040] The present application converts the rotary motion of the adjusting knob into the linear displacement of the protective sleeve body through the screw pair to realize the stepless expansion and contraction of the duck bill, and the multi-point pin load reduces wear, ensures smooth and accurate rotation, and retains the ability of quick disassembly and maintenance.

[0041] According to an embodiment of the present application, a front end sealing groove and a rear end sealing groove are arranged in the inner side of the head fixing ring 22; A front end sealing ring 26 is arranged in the front end sealing groove, and a rear end sealing ring 27 is arranged in the rear end sealing groove; The inner side of the front end sealing ring 26 elastically abuts against the adjusting knob 23, and the inner side of the rear end sealing ring 27 elastically abuts against the protective sleeve body.

[0042] Preferably, when the telescopic protective sleeve 2 is connected with the endoscope 1, the rear end sealing ring 27 further elastically abuts against the outer wall of the insertion part of the endoscope 1, so as to realize the air-tight isolation between the endoscope 1 and the protective sleeve.

[0043] In the embodiment, two coaxial sealing grooves are arranged in the inner side of the head fixing ring 22: a front end sealing groove in which a front end sealing ring 26 is embedded, the inner periphery of which elastically abuts against the outer cylindrical surface of the adjusting knob 23; and a rear end sealing groove in which a rear end sealing ring 27 is embedded, the inner periphery of which elastically abuts against the outer wall of the protective sleeve body, forming two-stage independent sealing. When the protective sleeve is installed in the endoscope 1, the rear end sealing ring 27 is in interference fit with the outer wall of the insertion part of the endoscope 1, blocking the bidirectional leakage path of the perfusion liquid and the external air, and realizing the air-tight isolation between the endoscope and the sleeve. The front end sealing ring 26 provides constant damping when the knob is rotated, preventing the perfusion pressure from leaking along the thread pair, and blocking the contaminants from entering the screw area, ensuring the long-term stable rotation of the adjusting knob 23, thereby simultaneously meeting the needs of perfusion sealing and operation feeling under the endoscope without increasing additional sealing parts.

[0044] The present application is provided with two-stage independent sealing structure inside the head fixing ring, the rear end sealing ring realizes airtight isolation between the endoscope and the protective sleeve, and the front end sealing ring provides constant damping and prevents pollution, thereby meeting the needs of perfusion sealing and operation feeling under the endoscope.

[0045] Embodiment two As shown in the figure, according to an embodiment of the present application, a telescopic protective sleeve 2 used under an endoscope comprises a protective sleeve body and an adjusting part; The protective sleeve body is provided with a duckbill 21 at one end and connected with the adjusting part at the other end; under the control of the adjusting part, the overall length of the telescopic protective sleeve 2 can be adjusted, so as to change the relative distance between the duckbill 21 and the head of the endoscope 1.

[0046] The adjusting part comprises a head fixing ring 22, an adjusting knob 23, a limiting flange 24, a pin shaft 25, a front end sealing ring 26, a rear end sealing ring 27, an adjusting block 28, and a pin 30; The protective sleeve body can slide along the axis relative to the limiting flange 24; the end of the protective sleeve body away from the duckbill 21 is provided with at least two limiting grooves 29 designed along the axis, the limiting flange 24 is provided with pin shaft holes matching the position and number of the limiting grooves 29, and the pin shaft 25 penetrates the limiting groove and the pin shaft hole at one end to limit and connect the limiting flange 24 and the protective sleeve body; the groove width of the limiting groove 29, the inner diameter of the pin shaft hole, and the nominal diameter of the pin shaft 25 are matched, and a clearance fit is adopted to ensure smooth sliding and no significant shaking; the protective sleeve body moves axially along the length direction of the limiting groove 29 and does not self-rotate.

[0047] The end of the protective sleeve body on the same side as the limiting flange 24 is welded with the adjusting block 28, the adjusting block 28 is in a ring structure, the inside is welded and connected with the outside of the protective sleeve body, and the outside is provided with external threads; the inside of the head fixing ring 22 is provided with a front end sealing groove and a rear end sealing groove in a ring direction, the front end sealing groove is provided with the front end sealing ring 26, and the rear end sealing groove is provided with the rear end sealing ring 27.

[0048] The protective sleeve body is coaxially embedded in the inside of the head fixing ring 22, and the inside of the rear end sealing ring 27 abuts against the protective sleeve body; when the telescopic protective sleeve 2 is loaded into the endoscope 1, the sealing effect of the rear end sealing ring 27 ensures the airtightness of the connection between the endoscope 1 and the telescopic protective sleeve 2.

[0049] The adjusting knob 23 is hollow inside and the inner wall is provided with internal threads matched with the external threads of the adjusting block 28, a limiting groove 31 is circumferentially arranged on the inner side of the rear end of the adjusting knob 23, the front end of the head fixing ring 22 is inserted into the limiting groove 31 and is rotationally connected with the adjusting knob 23; the outer wall of the adjusting knob 23 is provided with a positioning hole, the outer wall of the head fixing ring 22 is provided with an annular positioning groove 32 matched with the positioning hole, one end of the pin 30 penetrates through the positioning hole and is connected with the positioning groove 32 inside the limiting groove 31, so that the adjusting knob 23 and the head fixing ring 22 can only make axial rotation; the front end sealing ring 26 in the front end sealing groove abuts against the adjusting knob 23; the sealing effect of the front end sealing ring 26 not only ensures the airtightness of the connection between the head fixing ring 22 and the adjusting knob 23, but also enhances the operation feeling of rotating the adjusting knob 23 by increasing the rotation damping, so that fine adjustment is facilitated.

[0050] The protective sleeve body is placed inside the endoscope 1, the adjusting knob 23 and the head fixing ring 22 are exposed at the tail of the endoscope, the adjusting knob 23 is rotated, the adjusting block 28 is driven by the internal threads of the adjusting knob 23 to make axial linear motion, further, the pin shaft 25 slides along the limiting groove 29 to drive the protective sleeve body to move along the length direction of the endoscope 1, so that the relative distance between the duckbill 21 and the head of the endoscope 1 is changed, and the function of length expansion of the duckbill 21 is realized; that is, when the adjusting knob 23 is rotated clockwise, the duckbill 21 extends forward relative to the head of the endoscope 1; when the adjusting knob 23 is rotated counterclockwise, the length of the duckbill 21 extending out of the head of the endoscope 1 is shortened.

[0051] The present application can flexibly adjust the length of the duckbill according to the actual situation in the operation, so that the protective sleeve accurately fits various bone or tissue positions, provides stable and reliable support for the operation, optimizes the operation effect and effectively reduces the operation risk. Meanwhile, the present application also fully considers the convenience of operation of medical staff, reduces the number of replacement of the protective sleeve, simplifies the operation process, shortens the operation time, further protects the safety of patients and improves the overall medical efficiency and quality.

[0052] Embodiment three Figure 4 The installation method flow chart of the telescopic protective sleeve of an embodiment of the present application. As shown in the figure, according to an embodiment of the present application, an installation method of a telescopic protective sleeve is used for assembling the telescopic protective sleeve used under the endoscope of any kind of the present application, and the installation method comprises the following steps: Figure 4 Step S102, the protective sleeve body is inserted into the limiting flange 24, the limiting groove 29 on the protective sleeve body is aligned with the pin shaft hole on the limiting flange 24, and the pin shaft 25 is penetrated; Step S104, the adjusting block 28 is fixed to the end of the protective sleeve body away from the duckbill 21; ​Step S106, the head fixing ring 22 is coaxially connected with the limiting flange 24, the front end sealing groove and the rear end sealing groove of the limiting flange 24 are respectively filled with the front end sealing ring 26 and the rear end sealing ring 27; Step S108, the limiting groove 31 of the adjusting knob 23 is screwed into the front end of the head fixing ring 22, so that the internal thread of the adjusting knob 23 is engaged with the external thread of the adjusting block 28; Step S110, the pin 30 is pressed into the positioning hole of the adjusting knob 23 and is clamped into the annular positioning groove 32 arranged on the outer wall of the head fixing ring 22; Step S112, the assembled telescopic protective sleeve 2 is inserted from the tail end of the endoscope 1, and the adjusting knob 23 is twisted to make the duckbill 21 axially extend or retract.

[0053] In the embodiment, a mounting method of the telescopic protective sleeve is provided, which comprises the following steps: inserting the protective sleeve body into the limiting flange 24 and aligning the limiting groove 29 with the pin hole, inserting the pin 25, so that the protective sleeve body can only axially slide; fixing the adjusting block 28 with external thread to the tail end of the sleeve body (for example, welding), to form a screw nut unit; coaxially butting the head fixing ring 22 with the limiting flange 24, and simultaneously pressing the front end sealing ring 26 and the rear end sealing ring 27 into the front end sealing groove and the rear end sealing groove of the head fixing ring 22, to realize rotary sealing of the knob and airtight isolation of the mirror body; sleeving the limiting groove 31 of the adjusting knob 23 into the front end of the head fixing ring 22 and screwing, so that the internal thread of the adjusting knob 23 is engaged with the external thread of the adjusting block 28, to construct a rotary-linear conversion pair; pressing the pin 30 into the positioning hole of the adjusting knob 23 and clamping it into the annular positioning groove 32 of the head fixing ring 22, to complete axial locking of the knob and ensure that it can only rotate circumferentially; inserting the assembled telescopic protective sleeve 2 into the mirror body channel from the tail end of the endoscope 1, rotating the adjusting knob 23, and driving the protective sleeve body to axially move through the screw pair, so as to steplessly adjust the relative extension amount of the duckbill 21 and the head end of the endoscope 1; the whole process is completed once outside the mirror, without the need of additional tools, the sealing ring provides instant damping and sealing, prevents perfusion liquid from leaking, avoids replacement of instruments during operation, and effectively shortens the operation time.

[0054] The present application realizes fast and accurate connection of the telescopic protective sleeve and the endoscope by standardizing the assembly process, ensures sealing and adjusting functions, avoids replacement of instruments during operation, and effectively shortens the operation time.

[0055] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the method described above can refer to the corresponding process in the foregoing telescopic protective sleeve embodiment, which will not be described herein.

[0056] The above description is merely that of the preferred embodiments of the application and of the principles thereof. It will be appreciated that those skilled in the art will be able to devise numerous alternative arrangements based on the principles described herein without departing from the scope of the application as defined by the appended claims, and their equivalents. For example, the features recited in the specification of the application but not in the claims of the application, or in the claims of the application but not in the specification, can be combined with features of the claims of the application or of the specification of the application, respectively, to form alternative embodiments of the application.

[0057] It should be understood that the size of the serial number of the steps in the summary of the application and in the embodiments of the application does not absolutely mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the application.

Claims

1. A retractable protective sheath for use under an endoscope, characterized in that, include: Protective sleeve body and adjustment section; The protective sleeve body has a duckbill (21) at one end and is connected to the adjustment part at the other end; Under the control of the adjustment unit, the protective sleeve body can move axially relative to the endoscope (1) to adjust the relative extension of the duckbill (21) and the tip of the endoscope (1).

2. The retractable protective sleeve used under endoscopy according to claim 1, characterized in that, The adjustment unit includes: a head fixing ring (22), an adjustment knob (23), and a limiting flange (24); The protective sleeve body is connected to the limiting flange (24) at one end opposite to the duck tongue (21); the protective sleeve body can slide axially relative to the limiting flange (24); The head fixing ring (22) restricts the relative position of the limiting flange (24) and the adjusting knob (23); The adjustment knob (23) is rotatably connected to the protective sleeve body, and the relative position of the protective sleeve body and the limiting flange (24) can be controlled by rotating the adjustment knob (23).

3. The retractable protective sleeve used under endoscopy according to claim 2, characterized in that, The adjustment part also includes: a pin (25); The protective sleeve body is provided with a limiting groove (29) along the axial direction at the end opposite to the duck tongue (21). The limiting flange (24) is provided with pin holes that match the position and number of the limiting groove (29). One end of the pin (25) passes through the limiting groove (29) and the pin hole, and limits the connection between the limiting flange (24) and the protective sleeve body.

4. The retractable protective sleeve used under endoscopy according to claim 3, characterized in that: The groove width of the limiting groove (29), the inner diameter of the pin hole, and the nominal diameter of the pin (25) are matched and a clearance fit is adopted.

5. The retractable protective sleeve used under endoscopy according to claim 3, characterized in that: Multiple limiting grooves (29) may be provided circumferentially along the main body of the protective sleeve; The number of pin holes and the number of pins (25) match the number of limiting grooves (29).

6. The retractable protective sleeve used under endoscopy according to claim 2, characterized in that: The limiting flange (24) has a flange at its front end; the flange is axially clamped between the head fixing ring (22) and the adjusting knob (23) so that the limiting flange (24) is axially fixed relative to the head fixing ring (22).

7. The retractable protective sleeve used under endoscopy according to claim 2, characterized in that, The adjustment part further includes: an adjustment block (28) in a ring structure and a pin (30); The inner side of the adjusting block (28) is fixedly connected to the outer side of the protective sleeve body, and the outer side is provided with external threads; The adjustment knob (23) is hollow inside and its inner wall is provided with an internal thread that matches the external thread of the adjustment block (28); The adjustment knob (23) has a limiting groove (31) circumferentially arranged on the inner side of its rear end. The front end of the head fixing ring (22) is inserted into the limiting groove (31), and the limiting groove (31) is rotatably connected to the head fixing ring (22). The adjustment knob (23) has a positioning hole on its outer wall, and the head fixing ring (22) has an annular positioning groove (32) that matches the positioning hole on its outer wall. One end of the pin (30) passes through the positioning hole and connects with the positioning groove (32) inside the limiting groove (31), so that the adjustment knob (23) and the head fixing ring (22) can only rotate axially.

8. The retractable protective sleeve used under endoscopy according to claim 2, characterized in that: A circumferential front sealing groove and a rear sealing groove are provided along the inner side of the head fixing ring (22); A front sealing ring (26) is provided in the front sealing groove, and a rear sealing ring (27) is provided in the rear sealing groove. The inner side of the front sealing ring (26) elastically abuts against the adjustment knob (23), and the inner side of the rear sealing ring (27) elastically abuts against the protective sleeve body.

9. The retractable protective sleeve used under endoscopy according to claim 8, characterized in that: When the retractable protective sleeve is connected to the endoscope (1), the rear sealing ring (27) further elastically abuts against the outer wall of the insertion part of the endoscope (1) to achieve airtight isolation between the endoscope (1) and the protective sleeve.

10. A method for installing a retractable protective sleeve, used to assemble a retractable protective sleeve for use under an endoscope as described in any one of claims 1-9, characterized in that, Installation methods include: Insert the protective sleeve body into the limiting flange (24), and align the limiting groove (29) on the protective sleeve body with the pin hole on the limiting flange (24), and insert the pin (25). The adjusting block (28) is fixed to the end of the protective sleeve body away from the duck tongue (21); The head fixing ring (22) is coaxially connected to the limiting flange (24), and the front sealing ring (26) and the rear sealing ring (27) are respectively installed in the front sealing groove and the rear sealing groove of the limiting flange (24). Screw the limiting groove (31) of the adjustment knob (23) into the front end of the head fixing ring (22) so that the internal thread of the adjustment knob (23) engages with the external thread of the adjustment block (28); Press the pin (30) into the positioning hole of the adjustment knob (23) and lock it into the annular positioning groove (32) provided on the outer wall of the head fixing ring (22); Insert the assembled retractable protective sleeve into the end of the endoscope (1), and turn the adjustment knob (23) to make the duck tongue (21) extend and retract axially.

Images