Disassembling and assembling method for insertion head end of endoscope and clamp lifting device rocker arm

Abstract

The invention discloses an insertion head end of an endoscope and a dismounting and mounting method of a clamp lifting device rocker arm, and the insertion head end comprises a head end seat which is provided with a mounting groove and a position sealing cavity; one end of the clamp lifting device pin shaft extends into the mounting groove, the other end of the clamp lifting device pin shaft extends into the sealing cavity, and an axial through hole is formed in the clamp lifting device pin shaft; the clamp lifting device rocker arm is detachably connected to one end of the clamp lifting device pin shaft through a buckle structure. The clamp lifting device rocker arm is provided with a rocker arm threaded hole; the clamp lifting device crank is fixedly connected to the other end of the clamp lifting device pin shaft and located in the sealing cavity. The far end of the traction steel wire is fixedly connected with the forceps lifting device crank in the sealing cavity; the sealing cover shell is connected to the other end of the clamp lifting device pin shaft and seals the opening part of the sealing cavity, and a connecting hole corresponding to the axial through hole in position is formed in the sealing cover shell; the mounting pin penetrates through the connecting hole and the axial through hole to be in threaded connection with the rocker arm threaded hole. The clamp lifting device rocker arm can be inserted into the head end in a detachable cleaning mode, the installation groove is easy to clean, and cross contamination is not prone to being caused in the follow-up using process.

Description

Technical Field

[0001] The invention relates to the technical field of endoscopes, and in particular to a method for disassembling and assembling an insertion head end and a forceps lifting rocker arm of an endoscope. Background Art

[0002] Ultrasonic upper gastrointestinal electronic endoscopes are mainly used to examine and treat the upper gastrointestinal tract and surrounding organs. The forceps lifter is used to lift diagnostic and treatment instruments (such as biopsy puncture needles) to a better position in the optical and ultrasonic image field of the endoscope for easy observation and diagnosis and treatment. The forceps lifter is a key component of the endoscope.

[0003] The forceps lifter is usually composed of a traction wire, a forceps lifter rocker arm, a forceps lifter seat, a pin shaft, etc. By operating the lever on the endoscope operating handle, the traction wire is driven to move forward and backward, and then the traction wire drives the forceps lifter rocker arm to swing up and down, that is, the traction wire pulls the forceps lifter rocker arm to "lift" and pushes the forceps lifter rocker arm to "lower", thereby realizing the "lifting" and "lowering" operations of the front end of the diagnostic and treatment instrument.

[0004] Usually, a head end seat is provided on the insertion head end of the endoscope, and the head end seat is provided with a mounting groove. The rocker arm of the forceps lifter is installed in the mounting groove of the head end seat through a pin shaft. Since the rocker arm of the forceps lifter has a complex structure and is usually non-detachable, residues and other contaminants are easily hidden between the rocker arm of the forceps lifter and the mounting groove, which is extremely difficult to clean and is likely to cause a cross feeling during use. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that contaminants are easily hidden between the mounting grooves of the forceps lifting rocker arm and the head end seat, which is difficult to clean and thus causes cross contamination, thereby providing a method for disassembling and assembling the insertion head end of an endoscope and the forceps lifting rocker arm.

[0006] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0007] An insertion tip of an endoscope, comprising:

[0008] A head end seat, on which a mounting groove and a sealing cavity located on one side of the mounting groove are provided, wherein the mounting groove and the sealing cavity are separated by a partition wall, and the partition wall is provided with a pin shaft hole;

[0009] The pin shaft of the lifting clamp is sealed and installed on the pin shaft hole of the said partition wall, one end of which extends into the said installation groove and the other end of which extends into the said sealing cavity; the interior of the said lifting clamp pin shaft is provided with an axial through hole which penetrates axially;

[0010] The rocker arm of the pliers lifter is detachably connected to one end of the pliers lifter pin shaft through a snap-fit ​​structure and is located in the mounting groove; a rocker arm threaded hole corresponding to the position of the axial through hole is provided on one side of the rocker arm of the pliers lifter facing the pliers lifter pin shaft;

[0011] A crank for lifting the clamp, fixedly connected to the other end of the pin shaft of the lifting clamp extending into the sealed cavity and located in the sealed cavity;

[0012] A traction wire, the distal end of which passes through the wire hole on the head end seat, extends into the sealed cavity and is fixedly connected to the crank of the forceps lifter, and the proximal end of which is connected to the operating handle;

[0013] A sealing cover shell connected to the other end of the pin shaft of the clamp lifting device and sealing the open part of the sealing cavity, wherein the sealing cover shell is provided with a connecting hole corresponding to the position of the axial through hole;

[0014] The mounting pin passes through the connecting hole on the sealing cover shell and the axial through hole in the pin shaft of the clamp lifter and is threadedly connected to the rocker arm threaded hole in the rocker arm of the clamp lifter.

[0015] Furthermore, the traction wire drives the pliers lifter pin shaft to rotate around its own axis through the pliers lifter crank, and the pliers lifter pin shaft drives the pliers lifter rocker arm to rotate in the mounting groove through the snap-fit ​​structure.

[0016] Furthermore, the buckle structure includes a buckle arranged on the end surface of the lifting pin of the pliers toward the lifting rocker arm, and a slot arranged on the side of the lifting rocker arm toward the lifting pin; the buckle extends into the slot.

[0017] Furthermore, the buckles are provided in plurality around the circumference of the axial through hole, and the slots are provided in plurality around the rocker arm threaded hole, and each of the buckles extends into the slot corresponding to the position.

[0018] Furthermore, the axial through hole in the pin shaft of the clamp lifter is a threaded hole, and the mounting pin is threadedly connected to the axial through hole.

[0019] Furthermore, the rocker arm threaded hole is located at an eccentric position of the rocker arm of the clamp lifter; the pin shaft of the clamp lifter drives the rocker arm of the clamp lifter to rotate in the mounting groove through a snap-fit ​​structure, and the rocker arm of the clamp lifter has a minimum limit position and a lifted position during the rotation of the rocker arm in the mounting groove; when the rocker arm of the clamp lifter is in the minimum limit position, one end of the rocker arm of the clamp lifter away from the pin shaft of the clamp lifter is in contact with the bottom wall of the mounting groove; when the rocker arm of the clamp lifter is in the lifted position, one end of the rocker arm of the clamp lifter away from the pin shaft of the clamp lifter is lifted upward relative to the bottom wall of the mounting groove.

[0020] Furthermore, one end of the crank of the forceps lifter is sleeved and connected to the outer periphery of the pin shaft of the forceps lifter, the outer periphery of the pin shaft of the forceps lifter is provided with a mounting buckle protruding outward, and the crank of the forceps lifter is provided with a mounting groove that matches the mounting buckle.

[0021] Furthermore, a first sealing groove and a second sealing groove are provided on the outer periphery of the lifting pin shaft, a first rolling sealing ring is provided on the first sealing groove, and a second rolling sealing ring is provided on the second sealing groove; the outer periphery of the first rolling sealing ring abuts against the hole wall of the pin shaft hole, and the outer periphery of the second rolling sealing ring abuts against the hole wall of the connecting hole.

[0022] Furthermore, a pin shaft limiting seat is provided in the sealing cavity, a pin shaft limiting groove is provided in the pin shaft limiting seat, an inwardly recessed limiting groove is provided on the outer periphery of the lifting clamp pin shaft, the bottom wall of the limiting groove matches with the groove wall of the pin shaft limiting groove, and the groove side wall of the limiting groove matches with the opposite side walls of the pin shaft limiting seat.

[0023] Furthermore, in the axial direction of the pin shaft of the clamp lifter, the width of the rocker arm of the clamp lifter is smaller than the groove width of the mounting groove.

[0024] A method for disassembling and assembling a forceps lifting rocker arm, based on the insertion head end of the endoscope, the method for disassembling and assembling the forceps lifting rocker arm includes a method for installing the forceps lifting rocker arm and a method for disassembling the forceps lifting rocker arm, the method for installing the forceps lifting rocker arm and the method for disassembling the forceps lifting rocker arm are opposite in process, and the method for installing the forceps lifting rocker arm includes the following steps:

[0025] S1, pull the traction wire toward the proximal end for a distance, and then the pin of the lifting forceps rotates to the first position under the action of the traction wire;

[0026] S2, place one side of the rocker arm of the clamp lifter close to the side wall of the groove on the head end seat with the groove facing away from the adjacent wall, and slide the rocker arm of the clamp lifter into the groove;

[0027] S3, move the rocker arm of the pliers lifter toward the side close to the next door until the buckle on the pin shaft of the pliers lifter extends into the slot on one side of the rocker arm of the pliers lifter;

[0028] S4, release the traction wire to the far end for a distance until the rocker arm of the lifting clamp rotates to the lowest limit position that fits with the bottom wall of the installation groove;

[0029] S5, then insert the tool plate into the gap between the rocker arm of the lifting clamp and the side wall of the groove facing away from the next wall of the mounting groove;

[0030] S6. Insert the mounting pin through the connecting hole on the sealing cover and the axial through hole in the pin shaft of the lifting clamp, rotate the mounting pin clockwise until the mounting pin and the rocker arm threaded hole in the rocker arm of the lifting clamp are threaded into place, and then pull out the tool plate.

[0031] The technical solution of the present invention has the following advantages:

[0032] 1. At the insertion head end of the endoscope provided by the present invention, the rocker arm of the forceps lifter is detachably connected to one end of the pin shaft of the forceps lifter through a snap-fit ​​structure, and the mounting pin passes through the connecting hole on the sealing cover and the axial through hole in the pin shaft of the forceps lifter and is threadedly connected to the rocker threaded hole in the rocker arm of the forceps lifter; when it is necessary to clean the mounting groove of the rocker arm of the forceps lifter and the head end seat, first loosen the mounting pin, and then loosen the snap-fit ​​structure between the rocker arm of the forceps lifter and the pin shaft of the forceps lifter, so that the rocker arm of the forceps lifter can be removed from the mounting groove, which is convenient for cleaning the mounting groove and the rocker arm of the forceps lifter; after the cleaning is completed, the rocker arm of the forceps lifter can be buckled to one end of the pin shaft of the forceps lifter through the snap-fit ​​structure, and then the rocker arm of the forceps lifter and the pin shaft of the forceps lifter can be fixed together by using the mounting pin, and the crank of the forceps lifter can be pulled to rotate by pulling the steel wire, and the rocker arm of the forceps lifter can be driven by the pin shaft of the forceps lifter to be "lifted" and "lowered", thereby "lifting" and "lowering" the front end of the diagnostic and treatment instrument. The insertion head end of the rocker arm of the clamp lifter can be removably cleaned. On the one hand, after the rocker arm of the clamp lifter is removed, the mounting groove of the head end seat and the rocker arm of the clamp lifter are easy to clean, and it is not easy to cause cross contamination during subsequent use; on the other hand, the distal end of the traction wire is hidden inside the sealed cover, and the traction wire is not easily contaminated during use. There is no need to disassemble the traction wire for cleaning or to design a special cleaning pipe for the traction wire.

[0033] 2. The insertion head end of the endoscope provided by the present invention is provided with a first sealing groove and a second sealing groove on the outer periphery of the pin shaft of the lifting forceps. The inner wall of the first rolling sealing ring is sealingly arranged on the first sealing groove, and the outer periphery abuts against the hole wall of the pin shaft hole of the adjacent wall, thereby preventing contaminants in the installation groove from entering the sealing cavity through the pin shaft hole; the inner wall of the second rolling sealing ring is sealingly arranged on the first sealing groove, and the outer periphery abuts against the hole wall of the connecting hole of the sealing cover shell, thereby preventing contaminants in the external environment from entering the sealing cavity through the connecting hole; the two together can keep the sealing cavity in a clean and sterile environment, thereby preventing the traction wire from being contaminated during use.

[0034] 3. The insertion head end of the endoscope provided by the present invention, the arrangement of the pin shaft limit seat in the sealed cavity and the outer peripheral limit groove of the pin shaft of the forceps lifter facilitates the clamping of the pin shaft of the forceps lifter on the pin shaft limit seat, thereby limiting the axial movement of the pin shaft of the forceps lifter.

[0035] 4. At the insertion tip of the endoscope provided by the present invention, in the axial direction of the forceps lifter pin shaft, the width of the forceps lifter rocker arm is smaller than the groove width of the mounting groove, so as to facilitate the loading and unloading of the forceps lifter rocker arm.

[0036] 5. The disassembly and assembly method of the rocker arm of the clamp lifter provided by the present invention, during the installation process of the rocker arm of the clamp lifter, first pull the traction wire toward the proximal end for a distance so that the pin shaft of the clamp lifter rotates to the first position under the action of the traction wire; then slide one side of the rocker arm of the clamp lifter into the installation groove close to the groove side wall of the installation groove facing away from the adjacent wall; then move the rocker arm of the clamp lifter to the side close to the adjacent wall until the buckle on the pin shaft of the clamp lifter extends into the groove on one side of the rocker arm of the clamp lifter; then release the traction wire toward the distal end for a distance until the rocker arm of the clamp lifter rotates to the lowest limit position that fits the bottom wall of the groove of the installation groove; then insert the tool plate into the gap between the rocker arm of the clamp lifter and the groove side wall of the installation groove facing away from the adjacent wall; finally, insert the installation pin through the connecting hole on the sealing cover shell and the axial through hole in the pin shaft of the clamp lifter, rotate the installation pin clockwise until the installation pin and the rocker arm threaded hole in the rocker arm of the clamp lifter are threaded into place, and then pull out the tool plate. When the installation pin is rotated clockwise, the rocker arm of the clamp lifter is in the lowest limit position, that is, the bottom of the rocker arm of the clamp lifter is supported by the installation groove. Therefore, when the installation pin is installed, the pin shaft and the rocker arm of the clamp lifter are in a stable state and will not rotate clockwise with the installation pin. After installation, pull out the tool plate to complete the installation. The disassembly steps are the opposite of this process. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 Schematic diagram of the overall structure of the insertion tip of the endoscope in an embodiment of the present invention;

[0039] Figure 2 for Figure 1 Schematic diagram of the structure of removing the rocker arm of the clamp lifter;

[0040] Figure 3 It is a schematic diagram of the structure of the head end seat and the sealing cover before assembly in an embodiment of the present invention;

[0041] Figure 4 It is a schematic diagram of the connection relationship between the head end seat, the pin shaft of the clamp lifter, the rocker arm of the clamp lifter, the crank of the clamp lifter, the traction wire and the installation pin in the embodiment of the present invention;

[0042] Figure 5 It is a schematic diagram of the assembly relationship between the pin shaft of the pliers lifter, the rocker arm of the pliers lifter and the mounting pin in the embodiment of the present invention;

[0043] Figure 6 It is a schematic diagram of the connection relationship between the pin shaft of the lifting clamp, the first rolling sealing ring, and the second rolling sealing ring in the embodiment of the present invention;

[0044] Figure 7 is a cross-sectional view of the insertion tip of an endoscope in an embodiment of the present invention;

[0045] Figure 8 It is a schematic diagram of the rocker arm of the caliper lifter and the mounting pin before being installed into the mounting groove in the embodiment of the present invention;

[0046] Fig. 9 It is a schematic diagram of the rocker arm of the pliers lifter being installed into the installation groove in the embodiment of the present invention;

[0047] Fig.10 It is a schematic diagram of the tool plate inserted into the gap between the rocker arm of the pliers lifter and the mounting groove in an embodiment of the present invention;

[0048] Fig.11 This is a schematic diagram of an embodiment of the present invention in which the installation pin and the pliers lifting rocker arm are threaded into place and the tool plate is pulled out.

[0049] Description of reference numerals: 100, head end seat; 110, mounting groove; 111, groove bottom wall; 112, groove side wall; 120, sealing cavity; 130, partition wall; 140, optical imaging sensor module; 150, water and gas nozzle mounting hole; 160, lighting window; 170, ultrasonic probe; 180, instrument channel; 190, inclined surface; 200, lifting forceps pin; 210, axial through hole; 220, buckle; 230, mounting buckle; 240, first sealing groove; 250, second sealing groove; 260, limiting groove; 300, rocker arm of the lifting clamp; 310, guide groove; 320, threaded hole of the rocker arm; 330, slot; 400, crank of the lifting clamp; 500, traction wire; 600, sealing cover; 610, connecting hole; 700, mounting pin; 810, first rolling sealing ring; 820, second rolling sealing ring; 900, pin shaft limiting seat; 10, tool plate. DETAILED DESCRIPTION

[0050] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Among them, the term "distal end" refers to the end far from the operator, and the term "proximal end" refers to the end close to the operator.

[0053] In the prior art, the rocker arm of the forceps lifting device of the ultrasonic electronic upper gastrointestinal endoscope is accommodated in a mounting groove of the head end seat, and the gap between the rocker arm of the forceps lifting device and the mounting groove of the head end seat is easy to hide contaminants; and because the rocker arm of the forceps lifting device is difficult to disassemble, the contaminants between the rocker arm of the forceps lifting device and the mounting groove of the head end seat cannot be thoroughly cleaned and disinfected. To solve the above problems, the present application provides an insertion head end of an endoscope, which can be applied to an ultrasonic electronic upper gastrointestinal endoscope and can also be applied to the head end of an electronic duodenoscope.

[0054] like Figure 1 -7 shows an insertion tip of an endoscope, which includes a tip end seat 100, a forceps lifter pin 200, a forceps lifter rocker arm 300, a forceps lifter crank 400, a traction wire 500, a sealing cover 600 and a mounting pin 700.

[0055] like Figure 1 - Figure 3As shown, the distal end surface of the head end seat 100 is an inclined surface 190, and the distal end of the head end seat 100 is connected to an ultrasonic probe 170, which is used to detect the inside of the human body by emitting ultrasonic waves. The head end seat 100 is provided with a mounting groove 110 and a sealed cavity 120 located on one side of the mounting groove 110. The mounting groove 110 and the sealed cavity 120 are separated by a partition wall 130, and the partition wall 130 is provided with a pin hole. The optical imaging sensor module 140, the water vapor nozzle mounting hole 150 and the lighting window 160 are provided on the inclined surface 190 on the side of the mounting groove 110 facing away from the sealed cavity 120. An instrument channel 180 communicating with the mounting groove 110 is provided in the head end seat 100, and the diagnostic instrument extends out through the opening at the far end of the instrument channel 180 and then extends toward the mounting groove 110; the forceps lifting rocker arm 300 is rotatably arranged in the mounting groove 110, and a guide groove 310 is provided on one side of the forceps lifting rocker arm 300, and the diagnostic instrument extends out toward the guide groove 310 after passing through the opening at the far end of the instrument channel 180. The forceps lifting rocker arm 300 is lifted and lowered during the rotation process, thereby lifting and lowering the far end of the diagnostic instrument.

[0056] like Figure 5 - Figure 7 As shown, the pin shaft 200 of the pliers lifter is sealed and installed on the pin shaft hole of the partition 130, one end of the pin shaft 200 of the pliers lifter extends into the installation groove 110, and the other end extends into the sealing cavity 120; an axial through hole 210 is provided inside the pin shaft 200 of the pliers lifter. The rocker arm 300 of the pliers lifter is detachably connected to one end of the pin shaft 200 of the pliers lifter through a buckle structure and is located in the installation groove 110; a rocker arm threaded hole 320 corresponding to the position of the axial through hole 210 is provided on the side of the rocker arm 300 of the pliers lifter facing the pin shaft 200 of the pliers lifter.

[0057] like Figure 3 and Figure 4 As shown, the crank 400 of the forceps lifting device is fixedly connected to the other end of the forceps lifting device pin 200 extending into the sealed cavity 120 and is located in the sealed cavity 120. The distal end of the traction wire 500 passes through the wire hole on the head end seat 100 and extends into the sealed cavity 120 and is fixedly connected to the crank 400 of the forceps lifting device, and the proximal end of the traction wire 500 is connected to the operating handle; the traction wire 500 drives the pin 200 of the forceps lifting device to rotate around its own axis through the crank 400 of the forceps lifting device.

[0058] like Figure 3 and Figure 7 As shown, the sealing housing 600 is connected to the other end of the forceps lifting device pin shaft 200 and seals the open part of the sealing cavity 120. The sealing housing 600 is provided with a connecting hole 610 corresponding to the position of the axial through hole 210. The mounting pin 700 passes through the connecting hole 610 on the sealing housing 600 and the axial through hole 210 in the forceps lifting device pin shaft 200 and is threadedly connected to the rocker arm threaded hole 320 in the forceps lifting device rocker arm 300.

[0059] At the insertion head end of the endoscope, the forceps lifting rocker arm 300 is detachably connected to one end of the forceps lifting pin 200 through a snap-fit ​​structure, and the mounting pin 700 passes through the connecting hole 610 on the sealing cover 600 and the axial through hole 210 in the forceps lifting pin 200 and is threadedly connected to the rocker threaded hole 320 in the forceps lifting rocker arm 300; when it is necessary to clean the forceps lifting rocker arm 300 and the mounting groove 110 of the head end seat 100, first loosen the mounting pin 700, and then loosen the snap-fit ​​structure between the forceps lifting rocker arm 300 and the forceps lifting pin 200, so that the forceps lifting rocker arm can be removed. 300 is removed from the mounting groove 110, so as to facilitate the cleaning of the mounting groove 110 and the forceps lifting rocker arm 300; after cleaning, the forceps lifting rocker arm 300 can be buckled on one end of the forceps lifting pin 200 through the snap-fit ​​structure, and then the forceps lifting rocker arm 300 and the forceps lifting pin 200 can be fixed together by using the mounting pin 700, and the forceps lifting crank 400 is pulled to rotate by the traction wire 500, and the forceps lifting pin 200 can be driven to "lift" and "lower" the forceps lifting rocker arm 300, thereby "lifting" and "lowering" the front end of the diagnostic and treatment instrument. The insertion head end of the rocker arm 300 of the clamp lifter can be detached and cleaned. On the one hand, after the rocker arm 300 of the clamp lifter is removed, the installation groove 110 of the head end seat 100 and the rocker arm 300 of the clamp lifter are easy to clean, and it is not easy to cause cross contamination during subsequent use; on the other hand, the distal end of the traction wire 500 is hidden inside the sealing cover 600, and the traction wire 500 is not easily contaminated during use. There is no need to disassemble the traction wire 500 for cleaning or to design a special cleaning pipe for the traction wire 500.

[0060] In some embodiments, the buckle structure includes a buckle 220 disposed on the end surface of the forceps lifting pin 200 facing the forceps lifting rocker arm 300 and protruding outward, and a slot 330 disposed on the side of the forceps lifting rocker arm 300 facing the forceps lifting pin 200; the buckle 220 extends into the slot 330. In other alternative embodiments, the positions of the buckle 220 and the slot 330 in the buckle structure can be interchangeably arranged, for example, the slot 330 is disposed on the side of the forceps lifting pin 200 facing the forceps lifting rocker arm 300, and the buckle 220 protruding outward is disposed on the end surface of the forceps lifting rocker arm 300 facing the forceps lifting pin 200.

[0061] In some embodiments, the axial through hole 210 is located at the center of the forceps lifting pin 200, and the rocker arm threaded hole 320 is located at the eccentric position of the forceps lifting rocker arm 300. Two buckles 220 are provided around the circumference of the axial through hole 210, and multiple slots 330 are also provided around the rocker arm threaded hole 320, and each buckle 220 extends into the slot 330 corresponding to the position; the buckle 220 and the slot 330 can be in the shape of a cuboid or a cylinder. In other alternative embodiments, the number of buckles 220 and the slot 330 can also be three or more.

[0062] In some embodiments, the axial through hole 210 in the forceps lifting pin 200 is a threaded hole, and the mounting pin 700 is threadedly connected to the axial through hole 210; such a configuration can improve the connection reliability among the mounting pin 700, the forceps lifting pin 200 and the forceps lifting rocker arm 300.

[0063] In some embodiments, one end of the forceps lifting crank 400 is sleeved and connected to the outer periphery of the forceps lifting pin 200, and the outer periphery of the forceps lifting pin 200 is provided with an outwardly protruding mounting buckle 230, and the forceps lifting crank 400 is provided with a mounting groove that matches the mounting buckle 230; in this way, the forceps lifting crank 400 and the forceps lifting pin 200 can be installed and fixed, and the forceps lifting crank 400 can drive the forceps lifting pin 200 to rotate around its own axis. In other alternative embodiments, the positions of the mounting buckle 230 and the mounting groove can be interchanged, as long as the forceps lifting crank 400 and the forceps lifting pin 200 can rotate synchronously.

[0064] In some embodiments, a first sealing groove 240 and a second sealing groove 250 are provided on the outer periphery of the lifting pin 200, a first rolling sealing ring 810 is provided on the first sealing groove 240, and a second rolling sealing ring 820 is provided on the second sealing groove 250; the outer periphery of the first rolling sealing ring 810 abuts against the hole wall of the pin hole, and the outer periphery of the second rolling sealing ring 820 abuts against the hole wall of the connecting hole 610. The inner wall seal of the first rolling sealing ring 810 is set on the first sealing groove 240, and the outer periphery is abutted against the hole wall of the pin shaft hole of the partition wall 130, which can prevent pollutants in the installation groove 110 from entering the sealing cavity 120 through the pin shaft hole; the inner wall seal of the second rolling sealing ring 820 is set on the first sealing groove 240, and the outer periphery is abutted against the hole wall of the connecting hole 610 of the sealing cover shell 600, which can prevent pollutants from the external environment from entering the sealing cavity 120 through the connecting hole 610; the two can work together to keep the sealing cavity 120 in a clean and sterile environment, preventing the traction wire 500 from being contaminated during use.

[0065] In some embodiments, a pin stopper seat 900 is provided in the sealed cavity 120, and the pin stopper seat 900 is fixed in the sealed cavity 120 by a pin. A pin stopper groove is provided in the pin stopper seat 900, and a stopper groove 260 is provided inwardly concave on the periphery of the pin 200 of the lifting forceps device. The groove bottom wall 111 of the stopper groove 260 matches with the groove wall of the pin stopper groove, and the groove side wall 112 of the stopper groove 260 matches with the opposite side walls of the pin stopper seat 900. The arrangement of the pin stopper seat 900 in the sealed cavity 120 and the stopper groove 260 on the periphery of the pin 200 of the lifting forceps device facilitates the clamping of the lifting forceps device pin 200 on the pin stopper seat 900, and limits the axial movement of the pin 200 of the lifting forceps device.

[0066] In some embodiments, the forceps lifting device rocker arm 300 has a minimum limit position and a lifting position during the rotation process in the mounting groove 110; when the forceps lifting device rocker arm 300 is in the minimum limit position, the end of the forceps lifting device rocker arm 300 away from the forceps lifting device pin 200 is in contact with the groove bottom wall 111 of the mounting groove 110; when the forceps lifting device rocker arm 300 is in the lifting position, the end of the forceps lifting device rocker arm 300 away from the forceps lifting device pin 200 is lifted upward relative to the groove bottom wall 111 of the mounting groove 110. In the axial direction of the forceps lifting device pin 200, the width of the forceps lifting device rocker arm 300 is smaller than the groove width of the mounting groove 110, so as to facilitate the loading and unloading of the forceps lifting device rocker arm 300 in the mounting groove 110.

[0067] The embodiment of the present application also provides a method for disassembling and assembling a rocker arm of a forceps lifter based on the insertion head end of the endoscope, the method for disassembling and assembling the rocker arm of the forceps lifter includes a method for installing the rocker arm of the forceps lifter and a method for disassembling the rocker arm of the forceps lifter. The method for installing the rocker arm of the forceps lifter is as follows: Figure 8 - Fig.11 As shown, the installation method of the rocker arm of the clamp lifter includes the following steps:

[0068] Step S1: Pull the traction wire 500 toward the proximal end for a certain distance. At this time, the pin 200 of the lifting device rotates to the first position under the action of the traction wire 500. Figure 8 ;

[0069] Step S2: Place one side of the rocker arm 300 of the clamp lifter close to the groove side wall 112 of the mounting groove 110 on the head end seat 100, which faces away from the partition wall 130, and slide the rocker arm 300 of the clamp lifter into the mounting groove 110, see Figure 8 and Fig. 9 ;

[0070] Step S3, move the lifting arm 300 toward the side close to the wall 130 until the buckle 220 on the lifting pin 200 extends into the slot 330 on one side of the lifting arm 300, see Fig. 9 and Fig.10 ;

[0071] Step S4, release the traction wire 500 to the far end for a distance until the lifting forceps rocker arm 300 rotates to the lowest limit position that fits with the bottom wall 111 of the installation groove 110, see Fig.10 ;

[0072] Step S5, then insert the tool plate 10 into the gap between the lifting pliers rocker arm 300 and the groove side wall 112 of the mounting groove 110 facing away from the partition wall 130, see Fig.10 ;

[0073] Step S6: insert the mounting pin 700 through the connection hole 610 on the sealing cover 600 and the axial through hole 210 in the pin shaft 200 of the lifting device, rotate the mounting pin 700 clockwise until the mounting pin 700 and the rocker arm threaded hole 320 in the rocker arm 300 of the lifting device are threadedly connected in place, and then pull out the tool plate 10, see Fig.10 and Fig.11 .

[0074] The installation method of the caliper lift rocker arm is opposite to the removal process of the caliper lift rocker arm, which will not be described in detail here.

[0075] In this method for disassembling and assembling the rocker arm of the forceps lifter, during the installation process of the rocker arm 300 of the forceps lifter, the traction wire 500 is first pulled toward the proximal end for a distance so that the pin shaft 200 of the forceps lifter rotates to the first position under the action of the traction wire 500; then, one side of the rocker arm 300 of the forceps lifter is slid into the installation groove 110 close to the groove side wall 112 facing away from the adjacent wall 130; then, the rocker arm 300 of the forceps lifter is moved toward the side close to the adjacent wall 130 until the buckle 220 on the pin shaft 200 of the forceps lifter extends into the clamp groove 330 on one side of the rocker arm 300 of the forceps lifter; then, the traction wire 500 is pulled out of the groove 112 of the groove 112 and the clamp side wall 112 is pulled out ... Release it toward the far end for a distance until the rocker arm 300 of the clamp lifter rotates to the lowest limit position where it fits with the bottom wall 111 of the mounting groove 110; then insert the tool plate 10 into the gap between the rocker arm 300 of the clamp lifter and the groove side wall 112 of the mounting groove 110 facing away from the partition wall 130; finally, insert the mounting pin 700 through the connecting hole 610 on the sealing cover 600 and the axial through hole 210 in the pin shaft 200 of the clamp lifter, rotate the mounting pin 700 clockwise until the mounting pin 700 and the rocker arm threaded hole 320 in the rocker arm 300 of the clamp lifter are threaded into place, and then pull out the tool plate 10. When the installation pin 700 is rotated clockwise, the clamp lifter rocker arm 300 is in the lowest limit position, that is, the bottom of the clamp lifter rocker arm 300 is supported by the installation groove 110. Therefore, when the installation pin 700 is installed, the clamp lifter pin shaft 200 and the clamp lifter rocker arm 300 are in a stable state and will not rotate clockwise with the installation pin 700. After the installation is completed, the tool plate 10 is pulled out to complete the installation.

[0076] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An insertion tip of an endoscope, characterized in that: include: A head end seat (100) is provided with a mounting groove (110) and a sealing cavity (120) located on one side of the mounting groove (110), wherein the mounting groove (110) and the sealing cavity (120) are separated by a partition wall (130), and a pin shaft hole is provided on the partition wall (130); The pin shaft (200) of the clamp lifting device is sealingly mounted on the pin shaft hole of the partition wall (130), with one end extending into the mounting groove (110) and the other end extending into the sealing cavity (120); an axial through hole (210) is provided inside the pin shaft (200) of the clamp lifting device; A pliers lifter rocker arm (300) is detachably connected to one end of the pliers lifter pin shaft (200) via a snap-fit ​​structure and is located in the mounting groove (110); a rocker arm threaded hole (320) corresponding to the position of the axial through hole (210) is provided on a side of the pliers lifter rocker arm (300) facing the pliers lifter pin shaft (200); A pliers lifting crank (400) is fixedly connected to the other end of the pliers lifting pin (200) extending into the sealed cavity (120) and is located in the sealed cavity (120); A traction wire (500), the distal end of which passes through the wire hole on the head end seat (100) and extends into the sealed cavity (120) and is fixedly connected to the crank handle (400) of the forceps lifter, and the proximal end of which is connected to the operating handle; A sealing cover (600) connected to the other end of the pin shaft (200) of the lifting clamp and sealing the open part of the sealing cavity (120), wherein the sealing cover (600) is provided with a connecting hole (610) arranged corresponding to the position of the axial through hole (210); The mounting pin (700) passes through the connection hole (610) on the sealing cover (600) and the axial through hole (210) in the pin shaft (200) of the clamp lifter and is threadedly connected to the rocker arm threaded hole (320) in the rocker arm (300) of the clamp lifter.

2. The insertion tip of the endoscope according to claim 1, characterized in that: The buckle structure comprises a buckle (220) arranged on the end surface of the pliers lifting pin shaft (200) facing the pliers lifting rocker arm (300), and a slot (330) arranged on the side surface of the pliers lifting rocker arm (300) facing the pliers lifting pin shaft (200); the buckle (220) extends into the slot (330).

3. The insertion tip of the endoscope according to claim 2, characterized in that: A plurality of the buckles (220) are provided around the circumference of the axial through hole (210), and a plurality of the slots (330) are also provided around the rocker arm threaded hole (320), and each of the buckles (220) extends into the slot (330) corresponding to the position.

4. The insertion tip of the endoscope according to claim 1, characterized in that: The axial through hole (210) in the pin shaft (200) of the clamp lifter is a threaded hole, and the mounting pin (700) is threadedly connected to the axial through hole (210).

5. The insertion tip of the endoscope according to claim 1, characterized in that: The rocker arm threaded hole (320) is located at an eccentric position of the rocker arm (300) of the clamp lifter; the pin shaft (200) of the clamp lifter drives the rocker arm (300) of the clamp lifter to rotate in the mounting groove (110) through a snap-fit ​​structure, and the rocker arm (300) of the clamp lifter has a minimum limit position and a lifting position during the rotation in the mounting groove (110); when the rocker arm (300) of the clamp lifter is at the minimum limit position, one end of the rocker arm (300) of the clamp lifter away from the pin shaft (200) of the clamp lifter is in contact with the bottom wall (111) of the mounting groove (110); when the rocker arm (300) of the clamp lifter is at the lifting position, one end of the rocker arm (300) of the clamp lifter away from the pin shaft (200) of the clamp lifter is lifted upward relative to the bottom wall (111) of the mounting groove (110).

6. The insertion tip of the endoscope according to claim 1, characterized in that: One end of the pliers lifting crank (400) is sleeved and connected to the outer periphery of the pliers lifting pin shaft (200), the outer periphery of the pliers lifting pin shaft (200) is provided with an outwardly protruding mounting buckle (230), and the pliers lifting crank (400) is provided with a mounting groove that matches the mounting buckle (230) in a concave-convex manner.

7. The insertion tip of the endoscope according to claim 1, characterized in that: The outer periphery of the lifting pin shaft (200) is provided with a first sealing groove (240) and a second sealing groove (250); the first sealing groove (240) is provided with a first rolling sealing ring (810), and the second sealing groove (250) is provided with a second rolling sealing ring (820); the outer periphery of the first rolling sealing ring (810) abuts against the hole wall of the pin shaft hole, and the outer periphery of the second rolling sealing ring (820) abuts against the hole wall of the connecting hole (610).

8. The insertion tip of the endoscope according to claim 1, characterized in that: A pin shaft limiting seat (900) is fixed in the sealing cavity (120), a pin shaft limiting groove is provided in the pin shaft limiting seat (900), an inwardly recessed limiting groove (260) is provided on the outer periphery of the lifting forceps pin shaft (200), a groove bottom wall (111) of the limiting groove (260) cooperates with a groove wall of the pin shaft limiting groove, and a groove side wall (112) of the limiting groove (260) cooperates with the opposite side walls of the pin shaft limiting seat (900).

9. The insertion tip of the endoscope according to claim 1, characterized in that: In the axial direction of the forceps lifting pin shaft (200), the width of the forceps lifting rocker arm (300) is smaller than the groove width of the mounting groove (110).

10. A method for disassembling and assembling a rocker arm of a forceps lifter, based on the insertion tip of an endoscope according to any one of claims 1 to 9, characterized in that: The disassembly and assembly method of the pliers lifting device rocker arm includes an installation method of the pliers lifting device rocker arm, and the installation method of the pliers lifting device rocker arm includes the following steps: S1, pulling the traction wire (500) toward the proximal end for a certain distance, at which time the pin shaft (200) of the lifting forceps device rotates to a first position under the action of the traction wire (500); S2, placing one side of the rocker arm (300) of the clamp lifter in close contact with the groove side wall (112) of the mounting groove (110) on the head end seat (100) facing away from the next wall (130), and sliding the rocker arm (300) of the clamp lifter into the mounting groove (110); S3, moving the rocker arm (300) of the forceps lifter toward a side close to the next wall (130) until the buckle (220) on the pin shaft (200) of the forceps lifter extends into the slot (330) on one side of the rocker arm (300) of the forceps lifter; S4, releasing the traction wire (500) to the far end for a certain distance until the lifting forceps rocker arm (300) rotates to the lowest limit position where it fits with the bottom wall (111) of the installation groove (110); S5, then inserting the tool plate (10) into the gap between the lifting clamp rocker arm (300) and the groove side wall (112) of the mounting groove (110) facing away from the partition wall (130); S6. Insert the mounting pin (700) through the connecting hole (610) on the sealing cover (600) and the axial through hole (210) in the pin shaft (200) of the lifting clamp, rotate the mounting pin (700) clockwise until the mounting pin (700) and the rocker arm threaded hole (320) in the rocker arm (300) of the lifting clamp are threaded into place, and then pull out the tool plate (10).

Images