Instrument pin, operating portion, and endoscope

Abstract

The application provides an instrument peg, an operating part and an endoscope, and relates to the technical field of endoscopes, and solves the problem of difficult insertion of a treatment instrument in the prior art. The instrument peg is used on the operating part of the endoscope, and comprises a peg main body and a membrane flap valve. The top end of the peg main body is provided with a containing groove that is closed on the side, and the peg main body is provided with a positioning hole that extends downward from the bottom of the containing groove and through which the treatment instrument passes. The diameter of the membrane flap valve is smaller than the inner diameter of the containing groove and larger than the hole diameter of the positioning hole. The periphery of the membrane flap valve is connected with the peg main body to close the groove opening of the containing groove. Between the periphery of the membrane flap valve and the peg main body, a weak connection part with lower tearing strength than the two sides is formed at the position inside the groove opening of the containing groove. A gap is formed between the membrane flap valve and the groove bottom of the containing groove. Compared with the prior art, the application can avoid excessive pressure on the valve flap when the treatment instrument passes through the membrane flap valve, and can avoid the difficulty in insertion caused by the material of the valve flap falling off and extruding the treatment instrument.

Description

Technical Field

[0001] This invention relates to the field of endoscopy technology, specifically to an instrument thimble, an operating part, and an endoscope. Background Technology

[0002] Endoscopes are used to enter the human body for examination, providing doctors with ample diagnostic information. When necessary, instruments can also be inserted into the endoscope to perform sampling or treatment of lesions. When inserting instruments, they must first pass through the valve on the instrument thimble and then be inserted into the thimble, further into the instrument tube, and finally protrude from the end of the instrument tube to the lesion site. Currently, the insertion of instruments sometimes encounters significant resistance, resulting in difficulty. Summary of the Invention

[0003] The purpose of this invention is to design an instrument thimble, an operating part, and an endoscope to solve the problem of difficult instrument insertion.

[0004] This invention is achieved through the following technical solution:

[0005] This invention provides an instrument plug for use in an endoscope, comprising a plug body and a valve. The plug body includes an mounting portion and a connecting portion connected sequentially along the axial direction. The connecting portion is used to connect to the operating portion of the endoscope. The top of the mounting portion is provided with a peripherally closed receiving groove. The plug body has a positioning hole extending downward from the bottom of the receiving groove for the insertion of a treatment instrument. The diameter of the valve is smaller than the inner diameter of the receiving groove but larger than the diameter of the positioning hole. The periphery of the valve is connected to the mounting portion to close the opening of the receiving groove. Between the periphery of the valve and the mounting portion, at the inner side of the opening of the receiving groove, a weak connecting portion with lower tear strength than the sides is formed. A gap is formed between the valve and the bottom of the receiving groove. Between the bottom of the mounting portion and the top of the connecting portion, at the middle section of the positioning hole, a clamping cavity coaxial with the positioning hole is formed. The diameter of the clamping cavity is greater than or equal to the diameter of the valve, allowing the valve to enter the clamping cavity through the positioning hole and spread out flat.

[0006] When the above-described structure is used, the diaphragm valve and the plug body are connected and fixed with a weak connection that has lower tear strength than the surrounding structure. This allows the weak connection to tear when the treatment device applies a large axial thrust to the diaphragm valve as it passes through the slit, causing the diaphragm valve to break off and detach from the plug body. Because the inner diameter of the receiving groove at the top of the plug body is larger than the diameter of the diaphragm valve, and there is an installation gap between the diaphragm valve and the receiving groove, the detached diaphragm valve will be carried to the bottom of the receiving groove by the treatment device. Since the periphery of the diaphragm valve is no longer constrained by the connecting structure, and the bottom surface of the diaphragm valve abuts against the edge of the smaller diameter positioning hole, using the edge of the positioning hole as a fulcrum, the diaphragm valve can be pushed into the positioning hole in a deformed manner, with the periphery warped upwards and the center concave downwards. This deformation of the diaphragm valve will reduce the engagement force between the valve discs forming the slit, and may even create a bottom gap. In this way, as the treatment instrument is continuously inserted into the positioning hole, the resistance of the valve disc to the treatment instrument is reduced, allowing the treatment instrument to pass through the slit formed between the valve discs more easily into the positioning hole. This ensures that the treatment instrument can pass through the positioning hole normally, while effectively preventing excessive force from being applied to the valve disc, which could cause some material to tear and detach, entering the instrument tube and compressing the treatment instrument, thus making insertion difficult. Furthermore, it also prevents detached valve disc material from ultimately entering the human body and affecting human health. The clamping cavity in the middle section of the positioning hole can accommodate the flattened valve disc. Even when the valve disc is pressed into the positioning hole by the treatment instrument, the sudden increase in space allows the valve disc to return to its original shape under its elastic force, thus trapping the valve disc and preventing it from being further carried into the instrument tube. Because the clamp can trap the valve, it ensures that the valve will not enter the instrument tube. This allows the instrument to utilize the narrow channel of the positioning hole to cause the valve to deform upwards to the maximum extent. By utilizing the length of the front section of the positioning hole and the frictional resistance applied by the hole wall to the periphery of the valve, the instrument can successfully pass through the slit of the valve, thereby improving the success rate of instrument insertion and enhancing the applicability of the instrument plug.

[0007] To further improve the implementation of the present invention, the following structure is specifically adopted: the diaphragm valve has a slit in the middle that is recessed relative to the periphery.

[0008] When the above-mentioned structure is adopted, the recessed center of the slit of the diaphragm valve makes it easier to position the front end of the treatment device, allowing the treatment device to apply pressure to the diaphragm valve more centrally, balancing the force on each valve disc, and better avoiding excessive pressure on some valve discs, which could lead to valve disc material falling off.

[0009] To further improve the implementation of the present invention, the following structure is specifically adopted: the thickness of the slit in the middle of the diaphragm valve gradually decreases from the outside to the inside.

[0010] When the above-mentioned structure is adopted, the slit on the diaphragm valve gradually thins inward from the middle, which makes the bonding force between the valve discs lower and the deformation easier. While ensuring the seal, it allows the treatment device to pass through more easily and can effectively prevent the treatment device from applying too much pressure to the valve disc, which could cause the valve disc material to fall off.

[0011] To further improve the implementation of the present invention, the following structure is specifically adopted: at least one of the top or bottom surfaces of the weak connection portion is recessed relative to the periphery of the diaphragm valve.

[0012] To further improve the present invention, the following structure is specifically adopted: the mounting part can move axially relative to the connecting part to adjust the axial dimension of the clamping cavity, so that the mounting part and the connecting part can axially clamp the diaphragm valve that enters the clamping cavity.

[0013] When the above-mentioned structure is adopted, the adjustment allows the maximum axial dimension of the clamping cavity to be greater than the thickness of the valve and the minimum axial dimension to be less than the thickness of the valve. The mounting part and the connecting part can clamp the flattened valve by adjusting the axial dimension of the clamping cavity. This allows the instrument plug to forcibly fix the periphery of the valve in the final stage, so that the treatment instrument can successfully pass through the valve in the final stage without bringing the valve into the instrument tube. This improves the applicability of the instrument plug and avoids the situation where the treatment instrument cannot successfully pass through the valve in the instrument plug and the instrument plug must be replaced.

[0014] To further improve the present invention, the following structure is specifically adopted: the bottom of the mounting part is provided with a first annular protrusion located in the clamping cavity; the top of the connecting part is provided with a second annular protrusion located in the clamping cavity; when the mounting part and the connecting part are axially clamped into the clamping cavity to insert the diaphragm valve, the first annular protrusion presses the part of the diaphragm valve located outside the slit against the outer peripheral surface of the second annular protrusion to stretch the diaphragm valve outward and expand the width of the slit.

[0015] When the above-mentioned structure is adopted, the mounting part and the connecting part of the axial dimension adjustment clamp can stretch the diaphragm valve outward through the cooperation of the first annular protrusion and the second annular protrusion, so that the slit width is expanded to form a gap, so that the treatment instrument can easily pass through the diaphragm valve in the final stage, avoiding excessive pressure on the valve valve and causing the valve valve material to fall off.

[0016] To further improve the implementation of this invention, the following structure is specifically adopted: the outer peripheral surface is configured as a conical surface with a diameter that gradually increases from top to bottom.

[0017] When the above-mentioned structure is adopted, the outer peripheral surface is set as a conical surface, which allows the diaphragm valve to extend outward better.

[0018] To further improve the implementation of the present invention, the following structure is specifically adopted: the mounting part includes a soft elastic sub-part and a rigid support sub-part, the bottom of the elastic sub-part is sleeved on the top of the support sub-part, and the elastic sub-part and the diaphragm valve are integrally formed; the bottom of the support sub-part is detachably connected to the top of the rigid connecting part.

[0019] With the above-described structure, the part housing the valve can be replaced. If the valve is dislodged from the instrument plug by the previous instrument during subsequent use of other treatment devices, the mounting part can be replaced. The rigid mounting and connecting parts provide sufficient clamping force to the valve without deformation.

[0020] To further improve the implementation of the present invention, the following structure is specifically adopted: the bottom of the support sub-part is threadedly connected to the top of the connecting part.

[0021] When the above-mentioned structure is adopted, the mounting part is threadedly connected to the connecting part through the support sub-part, so that the axial dimension of the clamping cavity can be easily adjusted by rotating the mounting part.

[0022] To further improve the implementation of the present invention, the following structure is specifically adopted: the elastic sub-part and the support sub-part are detachably connected.

[0023] With the above-described structure, the elastic sub-component can be replaced separately when the mounting part is replaced.

[0024] The present invention also provides an operating part, the operating part including the above-described instrument plug.

[0025] The present invention also provides an endoscope, the endoscope including the above-described operating part.

[0026] The present invention has the following advantages and beneficial effects:

[0027] In this invention, the diaphragm valve and the plug body are connected and fixed by a weak connection with lower tear strength than the surrounding structure. When the treatment instrument passes through the slit of the diaphragm valve and applies a large axial thrust, the weak connection will tear, allowing the diaphragm valve to break off and detach from the plug body. Because the inner diameter of the receiving groove at the top of the plug body is larger than the diameter of the diaphragm valve, and there is an installation gap between the diaphragm valve and the receiving groove, the detached diaphragm valve will be carried to the bottom of the receiving groove by the treatment instrument. Since the periphery of the diaphragm valve is no longer constrained by the connecting structure, and the bottom surface of the diaphragm valve abuts against the edge of the smaller diameter positioning hole, using the edge of the positioning hole as a fulcrum, the diaphragm valve can be pushed into the positioning hole in a deformed manner, with the periphery warped upwards and the center concave downwards. This deformation of the diaphragm valve will reduce the engagement force between the valve discs forming the slit, and may even create a bottom gap. In this way, as the treatment instrument is continuously inserted into the positioning hole, the resistance of the valve disc to the treatment instrument is reduced, allowing the treatment instrument to pass through the slit formed between the valve discs more easily into the positioning hole. This ensures that the treatment instrument can pass through the positioning hole normally, while effectively preventing excessive force from being applied to the valve disc, which could cause some material to tear and detach, entering the instrument tube and compressing the treatment instrument, thus making insertion difficult. Furthermore, it also prevents detached valve disc material from ultimately entering the human body and affecting human health. The clamping cavity in the middle section of the positioning hole can accommodate the flattened valve disc. Even when the valve disc is pressed into the positioning hole by the treatment instrument, the sudden increase in space allows the valve disc to return to its original shape under its elastic force, thus trapping the valve disc and preventing it from being further carried into the instrument tube. Because the clamp can trap the valve, it ensures that the valve will not enter the instrument tube. This allows the instrument to utilize the narrow channel of the positioning hole, causing the valve to deform upwards to its maximum extent. The length of the initial section of the positioning hole, combined with the frictional resistance exerted by the hole wall on the valve's periphery, allows the instrument to successfully pass through the valve's slit, improving the success rate of instrument insertion and enhancing the applicability of the instrument plug. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the external structure of an instrument thrombus where the diaphragm valve has not detached from the thrombus body;

[0030] Figure 2 It shows Figure 1 The internal structure;

[0031] Figure 3 This is a schematic diagram of the external structure of the thrombus that has detached from the thrombus body;

[0032] Figure 4 It shows Figure 3 The internal structure;

[0033] Figure 5 This illustrates an internal structure in which the instrument is tethered to the valve as it enters the clamping cavity;

[0034] Figure 6 The diagram shows a structure in which the mounting part and the connecting part clamp the diaphragm valve through a first annular protrusion and a second annular protrusion.

[0035] Figure 7 Another structure is shown in which the mounting part and the connecting part clamp the diaphragm valve through the first annular protrusion and the second annular protrusion;

[0036] Figure 8 The structure of a diaphragm valve is shown, where the thickness gradually decreases from the outside to the inside.

[0037] Figure 9 yes Figure 8 A cross-sectional view of the structure shown;

[0038] Figure 10 This is a schematic diagram of the endoscope using the instrument plug of the present invention.

[0039] The diagram is marked as follows:

[0040] 10. Instrument plug;

[0041] 11. Bolt body; 111. Receiving groove; 112. Positioning hole; 112a. Clamping cavity; 113. Mounting part; 113a. First annular protrusion; 113b. Elastic sub-part; 113c. Support sub-part; 114. Connecting part; 114a. Second annular protrusion; 114b. Outer peripheral surface;

[0042] 12. Diaphragm valve; 121. Slit;

[0043] 13. Weak connections;

[0044] 20. Operations Department. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0046] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] To address the problem of difficult instrument insertion, the inventors discovered that this difficulty often arises because valve material from the diaphragm valve on the instrument plug falls into the instrument tube, causing compression of the instrument. The instrument plug has a closed diaphragm valve in the center, with its valve discs tightly fitted together to form a slit that can be opened by pressure on one side. During insertion, the end of the instrument pushes against the valve discs on either side of the slit, forcing them to flip inward and open the slit, allowing it to enter the instrument plug. However, when the instrument contacts the valve disc, excessive force may break it, causing small pieces of material to detach. If this detached material enters the instrument tube, it can compress the instrument during insertion, hindering its use. This could even cause blockages in the suction tube and sampling valve during negative pressure suction, potentially harming human health if it enters the body.

[0049] On the one hand, this application provides a device thimble that can effectively solve the problem of difficult insertion of treatment devices, such as... Figures 1-10As shown, it is specifically configured with the following structure:

[0050] In this embodiment, as Figure 10 As shown, the instrument plug 10 is used for an endoscope. It can be detachably connected to the instrument plug connector on the operating part 20 of the endoscope, or it can be partially fixedly connected to the housing of the operating part 20 of the endoscope, and the other part can be detachably connected to the portion that is fixedly connected to the housing of the operating part 20 of the endoscope.

[0051] like Figure 1 As shown, the instrument thrombec 10 includes a thrombec body 11 and a diaphragm valve 12. The diaphragm valve 12 closes the top of the thrombec body 11 and provides a slit 121 through which the treatment instrument can pass, so that the treatment instrument can enter the thrombec body 11 after passing through the slit 121.

[0052] like Figure 2 As shown, the main body 11 of the throttle has a positioning hole 112 for a treatment instrument to pass through and be positioned. The main body 11 has a receiving groove 111 at its top end. The periphery of the receiving groove 111 is closed by the peripheral wall of the main body 11, forming a groove with an open top and closed sides. The positioning hole 112 inside the main body 11 extends axially downward from the bottom of the receiving groove 111. The positioning hole 112 is coaxially arranged with the receiving groove 111, and the diameter of the positioning hole 112 is smaller than the inner diameter of the receiving groove 111.

[0053] like Figure 1 and Figure 2 As shown, the diameter of the diaphragm valve 12 is smaller than the inner diameter of the receiving groove 111 and larger than the diameter of the positioning hole 112. The periphery of the diaphragm valve 12 is fixedly connected to the top end of the plug body 11 to close the opening of the receiving groove 111. For example, the entire diaphragm valve 12 is located inside the receiving groove 111, and the periphery of the diaphragm valve 12 is fixedly connected to the edge of the opening of the receiving groove 111.

[0054] The diaphragm valve 12 is a soft elastomer, which is generally made of silicone.

[0055] The diaphragm valve 12 can be detached from the plug body 11. To allow the diaphragm valve 12 to detach from the plug body 11 under excessive axial pressure, the connection between the diaphragm valve 12 and the plug body 11 needs to be easily broken. Specifically, a weak connection portion 13 is formed between the periphery of the diaphragm valve 12 and the plug body 11, inside the groove of the receiving groove 111. This weak connection portion 13 extends around the center of the slit 121 on the diaphragm valve 12, forming a ring with lower tear strength than the sides.

[0056] In order for the diaphragm valve 12, which has detached from the valve body 11, to move downward into the receiving groove 111, an axial gap is formed between the diaphragm valve 12 and the bottom of the receiving groove 111.

[0057] In this embodiment, the diaphragm valve 12 and the plug body 11 are connected and fixed by a weak connection part 13 with lower tear strength than the surrounding structure. When the treatment instrument passes through the slit 121 of the diaphragm valve 12 and applies a large axial thrust to the diaphragm valve 12, the weak connection part 13 will tear, allowing the diaphragm valve 12 to break off from the plug body 11. This avoids the treatment instrument applying excessive force to the valve disc of the diaphragm valve 12, which could cause some material on the valve disc to tear and fall off. This also prevents the detached valve disc material from entering the instrument tube through the positioning hole 112 and squeezing against the treatment instrument, making it difficult to insert the treatment instrument. Furthermore, it also prevents the detached valve disc material from ultimately entering the human body and affecting human health.

[0058] Because the inner diameter of the receiving groove 111 at the top of the valve body 11 is larger than the diameter of the diaphragm valve 12, and there is an installation gap between the diaphragm valve 12 and the receiving groove 111, the detached diaphragm valve 12 will be brought to the bottom of the receiving groove 111 by the action of the treatment device. Since the periphery of the diaphragm valve 12 is no longer constrained by the connecting structure at this time, and the bottom surface of the diaphragm valve 12 will abut against the edge of the positioning hole 112 with a smaller diameter, with the edge of the positioning hole 112 as a fulcrum, the diaphragm valve 12 can be pushed into the positioning hole 112 in a deformed manner with the periphery curved upward and the center concave. This deformation of the diaphragm valve 12 will reduce the engagement force between the valve discs forming the slit 121, and may even cause the valve discs to separate at the bottom to create a bottom gap. In this way, as the treatment device is continuously inserted into the positioning hole 112, the resistance of the valve disc of the diaphragm valve 12 to the treatment device is smaller, allowing the treatment device to pass more easily through the slit 121 formed between the valve discs into the positioning hole 112. This ensures that the treatment device can pass normally into the positioning hole 112, while better avoiding the phenomenon that excessive force is applied to the valve disc of the diaphragm valve 12, causing some material to tear and fall off and enter the instrument tube through the positioning hole 112, thus compressing the treatment device and making it difficult to insert. In addition, it also avoids the phenomenon that the detached valve disc material will eventually enter the human body and affect human health.

[0059] Because there is an axial gap between the diaphragm valve 12 and the receiving groove 111, after the diaphragm valve 12 detaches from the plug body 11, the tip of the treatment device generally partially enters the slit 121 but does not pass through it. As the treatment device continues to move forward into the positioning hole 112, the diaphragm valve 12 impacts the bottom of the receiving groove 111, creating an impact process between the diaphragm valve 12 and the treatment device. This allows the treatment device to more easily pass through the slit 121 and enter the positioning hole 112 by taking advantage of the moment when the diaphragm valve 12 impacts the bottom of the receiving groove 111. The operator can control the impact force between the diaphragm valve 12 and the bottom of the receiving groove 111, performing one or more impacts. By ensuring that the valve disc of the diaphragm valve 12 experiences minimal force, the treatment device can smoothly pass through the slit 121, achieving the goal of easily passing through the treatment device without damaging the valve disc of the diaphragm valve 12.

[0060] In some cases, after the procedure is completed, the procedure instrument, along with the valve 12, leaves the receiving groove 111 after the endoscope's operating section is withdrawn. When using the same or different procedure instrument subsequently, the procedure instrument will no longer be obstructed by the valve 12 and can be directly inserted into the receiving groove 111, then into the positioning hole 112, and finally out of the positioning hole 112.

[0061] In some cases, after the procedure is completed, the procedure instrument and the valve 12 separate in the receiving groove 111 after the endoscope's operating part is withdrawn, leaving the valve 12 in the receiving groove 111. When using the same or different procedure instrument subsequently, the procedure instrument is first directly inserted into the receiving groove 111 before contacting the valve 12, with the valve 12, whose periphery is not constrained by the connecting structure, abutting against the bottom of the receiving groove 111. During the continuous insertion of the procedure instrument, the bottom surface of the valve 12 is pressed against the edge of the positioning hole 112. Using the edge of the positioning hole 112 as a fulcrum, the procedure instrument is pushed into the positioning hole 112 in a deformed manner, with the periphery curving upward and the center concave. This makes it easier for subsequent procedure instruments to pass through the slit 121 of the valve 12 and enter the positioning hole 112.

[0062] According to some optional embodiments, such as Figure 2 As shown, the diaphragm valve 12 has a slit 121 whose thickness is roughly the same in the middle as its outer periphery, but is recessed compared to the outer periphery. This recessed middle section of the slit 121 in the diaphragm valve 12 makes it easier to position the front end of the treatment device, allowing the device to apply pressure to the diaphragm valve 12 more centrally. This balances the force exerted on each valve disc and effectively prevents excessive pressure on some valve discs, which could lead to valve disc material detachment.

[0063] According to some optional embodiments, such as Figure 8 and Figure 9 As shown, the thickness of the slit 121 in the middle of the diaphragm valve 12 gradually decreases from the outside to the inside, causing the top surface of the slit 121 in the middle of the diaphragm valve 12 to be concave downwards, and the bottom surface to be roughly flush with the bottom surface of the outer periphery. The gradual inward thinning of the slit 121 in the middle of the diaphragm valve 12 results in a lower bonding force between the valve discs, making deformation easier. While ensuring a seal, it allows for easier passage of treatment instruments and effectively prevents the treatment instruments from applying excessive pressure to the valve discs, which could cause the valve disc material to detach.

[0064] According to some optional embodiments, such as Figure 1 and Figure 2 As shown, the thickness of the weak connection portion 13 formed between the diaphragm valve 12 and the plug body 11 is thinner than its two sides. Specifically, the top and bottom surfaces of the weak connection portion 13 are recessed compared to the periphery of the diaphragm valve 12. Alternatively, either the top or bottom surface of the weak connection portion 13 may have a single-sided recessed structure compared to the diaphragm valve 12. This thinner structure reduces the tear resistance of the weak connection portion 13 between the diaphragm valve 12 and the plug body 11, allowing the diaphragm valve 12 to be detached from the plug body 11 under pressure.

[0065] According to some alternative embodiments, the bolt body 11 is a separate component. For example, such as... Figures 1-5 As shown, the thrombus body 11 includes a mounting portion 113 and a connecting portion 114 connected sequentially along the axial direction. The mounting portion 113 is connected to the diaphragm valve 12, and a receiving groove 111 is formed at the top of the mounting portion 113. The connecting portion 114 is used to connect to the operating part of the endoscope. Specifically, it can be detachably connected to the instrument thrombus connector of the operating part 20 of the endoscope, or it can be fixedly connected to the housing of the operating part 20 of the endoscope. The positioning hole 112 is formed by the mounting portion 113 and the connecting portion 114, and the hole segments of the positioning hole 112 are distributed on the mounting portion 113 and the connecting portion 114.

[0066] Between the bottom of the mounting part 113 and the top of the connecting part 114, a clamping cavity 112a coaxial with the positioning hole 112 is formed at the middle section of the positioning hole 112. The diameter of the clamping cavity 112a is greater than or equal to the diameter of the diaphragm valve 12, so that after the diaphragm valve 12 enters the clamping cavity 112a through the positioning hole 112, it can use its own elasticity to spread out flat in the clamping cavity 112a and return to its original state.

[0067] In this embodiment, the clamping cavity 112a in the middle section of the positioning hole 112 can accommodate the flattened diaphragm valve 12. When the diaphragm valve 12 is pressed into the positioning hole 112 by the treatment instrument, the suddenly enlarged space allows the diaphragm valve 12 to return to its original shape under its elastic force, thus trapping the diaphragm valve 12 and preventing it from being further carried into the instrument tube. Because the clamping cavity 112a can trap the diaphragm valve 12, it ensures that the diaphragm valve 12 will not enter the instrument tube. This allows the treatment instrument to utilize the narrow channel of the positioning hole 112, causing the diaphragm valve 12 to deform upwards to the maximum extent. The length of the front section of the positioning hole 112, through the frictional resistance applied by the hole wall to the periphery of the diaphragm valve 12, allows the treatment instrument to successfully pass through the slit 121 of the diaphragm valve 12, thereby improving the success rate of instrument insertion and enhancing the applicability of the instrument plug 10.

[0068] According to some optional embodiments, such as Figures 1-5 As shown, the mounting part 113 can move axially relative to the connecting part 114 to adjust the axial dimension of the clamping cavity 112a, so that the mounting part 113 and the connecting part 114 can axially clamp the diaphragm valve 12 that has entered the clamping cavity 112a.

[0069] The axial position of the mounting part 113 and the connecting part 114 can be adjusted and positioned by friction through a plug-in connection to adjust the axial dimension of the clamping cavity 112a. Alternatively, the axial position of the mounting part 113 and the connecting part 114 can be adjusted and positioned by a snap-fit ​​provided along the axial direction to adjust the axial dimension of the clamping cavity 112a. Preferably, the mounting part 113 and the connecting part 114 are connected by a threaded connection to achieve the adjustment and positioning of the axial position of the mounting part 113 and the connecting part 114, because this adjustment method is continuously controllable and convenient to adjust by rotating the mounting part 113. Preferably, the mounting part 113 and the connecting part 114 are detachably connected together by a threaded connection.

[0070] In this embodiment, the adjustment allows the maximum axial dimension of the clamping cavity 112a to be greater than the thickness of the valve 12, and the minimum axial dimension to be less than the thickness of the valve 12. The mounting part 113 and the connecting part 114 can clamp the flattened valve 12 by adjusting the axial dimension of the clamping cavity 112a. This allows the instrument plug 10 to forcibly fix the periphery of the valve 12 in the final stage, so that the treatment instrument can successfully pass through the valve 12 in the final stage without bringing the valve 12 into the instrument tube. This improves the applicability of the instrument plug 10 and avoids the situation where the treatment instrument cannot successfully pass through the valve 12 in the instrument plug 10 and the instrument plug 10 must be replaced.

[0071] According to some alternative embodiments, the mounting portion 113 and the connecting portion 114 press the diaphragm valve 12 with the axial dimension of the adjusted clamping cavity 112a while allowing the diaphragm valve 12 to be stretched outward.

[0072] For example, a structure such as Figure 6 As shown, in the bolt body 11, the bottom of the mounting part 113 is screwed internally onto the external thread provided on the top of the connecting part 114. The bottom of the mounting part 113 is provided with a first annular protrusion 113a for axially pressing against the top surface of the diaphragm valve 12, and the first annular protrusion 113a is located within the clamping cavity 112a. Simultaneously, the top of the connecting part 114 is provided with a second annular protrusion 114a for axially supporting the bottom surface of the diaphragm valve 12. The second annular protrusion 114a is cylindrical, and a section of the positioning hole 112 is located in the middle of the second annular protrusion 114a. Similarly, the second annular protrusion 114a is located within the clamping cavity 112a. The first annular protrusion 113a and the second annular protrusion 114a respectively constitute the portions of the clamping cavity 112a that first contact the top and bottom surfaces of the diaphragm valve 12. The mounting part 113 and the connecting part 114 are connected by a screw connection. Rotating the mounting part 113 can adjust the axial position of the mounting part 113 and the connecting part 114 to change the axial dimension of the clamping cavity 112a. When the mounting part 113 and the connecting part 114 are axially clamped into the diaphragm valve 12 in the clamping cavity 112a, the first annular protrusion 113a contacts the part of the diaphragm valve 12 located on the periphery of the slit 121 and presses the part against the outer peripheral surface 114b of the second annular protrusion 114a, so that the outer side of the diaphragm valve 12 is stretched and extended outward, and finally extends and spreads outward, so that the width of the slit 121 is expanded to form a gap.

[0073] Another structure, such as Figure 7 As shown, based on the above structure, the second annular protrusion 114a is further configured as a frustum, and its outer peripheral surface 114b is a conical surface with a diameter that gradually increases from top to bottom. When the outer peripheral surface 114b is a conical surface, it can better fit and contact the bottom surface of the diaphragm valve 12, allowing the diaphragm valve 12 to better extend outward.

[0074] In this embodiment, the mounting part 113 and the connecting part 114 that adjust the axial dimension of the clamping cavity 112a can stretch the diaphragm valve 12 outward through the cooperation of the first annular protrusion 113a and the second annular protrusion 114a, so that the slit 121 expands in width and forms a gap, so that the treatment instrument can easily pass through the diaphragm valve 12 in the final stage, avoiding excessive pressure on the valve disc and causing the valve disc material to fall off.

[0075] According to some optional embodiments, such as Figures 1-7As shown, the valve body 11 includes a detachably connected mounting portion 113 and a connecting portion 114. The mounting portion 113 includes a soft elastic sub-part 113b and a rigid support sub-part 113c. The elastic sub-part 113b is made of silicone, and its bottom is fitted onto the top of the support sub-part 113c, so that the bottom of the elastic sub-part 113b is supported by the support sub-part 113c, making it less prone to deformation and convenient for the operator to hold and rotate. The elastic sub-part 113b and the diaphragm valve 12 are integrally molded silicone structures. The elastic sub-part 113b and the support sub-part 113c are connected and fixed to each other. The bottom of the support sub-part 113c is provided with an internal thread, and the top of the connecting portion 114 is provided with an external thread. The bottom of the support sub-part 113c is fitted onto the top of the rigid connecting portion 114 and is detachably connected to the top of the connecting portion 114 by means of a threaded connection.

[0076] In this embodiment, the portion providing the valve 12 can be replaced. If the valve 12 is pulled away from the instrument plug 10 by the previous instrument when using other treatment instruments, the mounting portion 113 can be replaced. The mounting portion 113 is threadedly connected to the connecting portion 114 via the support portion 113c, allowing the axial dimension of the clamping cavity 112a to be easily adjusted by rotation of the mounting portion 113.

[0077] Preferably, the elastic sub-part 113b and the support sub-part 113c are detachably connected, so that when the mounting part 113 is replaced, the elastic sub-part 113b can be replaced separately.

[0078] On the other hand, this application provides an operating unit, which specifically adopts the following configuration structure:

[0079] like Figure 10 As shown, the operating part 20 is provided with the instrument plug 10 in any of the above embodiments on its housing.

[0080] On the other hand, this application provides an endoscope, such as Figure 10 As shown, the endoscope includes the operating part 20 in the above embodiment.

[0081] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An instrument thimble (10) for use in an endoscope, characterized in that: include: The plug body (11) includes an installation part (113) and a connecting part (114) connected sequentially along the axial direction. The connecting part (114) is used to connect the operating part of the endoscope. The top end of the installation part (113) is provided with a peripherally closed receiving groove (111). The plug body (11) is provided with a positioning hole (112) extending downward from the bottom of the receiving groove (111) for the insertion of treatment instruments. A diaphragm valve (12) is provided, wherein the diameter of the diaphragm valve (12) is smaller than the inner diameter of the receiving groove (111) and larger than the diameter of the positioning hole (112). The periphery of the diaphragm valve (12) is connected to the mounting part (113) to close the opening of the receiving groove (111). Between the periphery of the diaphragm valve (12) and the mounting part (113), a weak connection part (13) with lower tear strength than the two sides is formed at the position inside the opening of the receiving groove (111). A gap is formed between the diaphragm valve (12) and the bottom of the receiving groove (111). Between the bottom of the mounting part (113) and the top of the connecting part (114), a clamping cavity (112a) coaxial with the positioning hole (112) is formed at the middle section of the positioning hole (112). The diameter of the clamping cavity (112a) is greater than or equal to the diameter of the diaphragm valve (12), so that the diaphragm valve (12) can enter the clamping cavity (112a) through the positioning hole (112) and spread out flat.

2. The instrument plug according to claim 1, characterized in that: The mounting part (113) includes a soft elastic sub-part (113b) and a rigid support sub-part (113c). The bottom of the elastic sub-part (113b) is sleeved on the top of the support sub-part (113c). The elastic sub-part (113b) and the diaphragm valve (12) are integrally formed. The bottom of the support sub-part (113c) is detachably connected to the top of the rigid connecting part (114).

3. The instrument plug according to claim 2, characterized in that: The mounting part (113) can move axially relative to the connecting part (114) to adjust the axial dimension of the clamping cavity (112a) so that the mounting part (113) and the connecting part (114) can axially clamp the diaphragm valve (12) that enters the clamping cavity (112a).

4. The instrument plug according to claim 3, characterized in that: The bottom of the mounting part (113) is provided with a first annular protrusion (113a) located in the clamping cavity (112a); The top of the connecting part (114) is provided with a second annular protrusion (114a) located in the clamping cavity (112a); When the mounting part (113) and the connecting part (114) are axially clamped into the clamping cavity (112a) of the diaphragm valve (12), the first annular protrusion (113a) presses the part of the diaphragm valve (12) located outside the slit (121) against the outer peripheral surface (114b) of the second annular protrusion (114a) to stretch the diaphragm valve (12) outward and expand the width of the slit (121).

5. The instrument plug according to claim 4, characterized in that: The outer peripheral surface (114b) is configured as a conical surface with a diameter that gradually increases from top to bottom.

6. The instrument plug according to claim 2, characterized in that: The bottom of the support sub-part (113c) is threadedly connected to the top of the connecting part (114).

7. The instrument plug according to claim 2, characterized in that: The elastic sub-part (113b) and the support sub-part (113c) are detachably connected.

8. The instrument plug according to claim 1, characterized in that: The diaphragm valve (12) is provided with a slit (121) in the middle that is recessed relative to the periphery; And / or, The thickness of the slit (121) in the middle of the valve (12) gradually decreases from the outside to the inside; And / or, At least one of the top or bottom surfaces of the weak connection (13) is recessed relative to the periphery of the diaphragm valve (12).

9. An operating unit, characterized in that: Includes the instrument plug (10) as described in any one of claims 1-8.

10. An endoscope, characterized in that: Includes the operating part (20) as described in claim 9.

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