Connecting device and medical endoscope

Abstract

The utility model provides a connecting device and a medical endoscope. The connecting device comprises a fixed connecting pipe which comprises an inserting pipe body and a fixed connecting pipe body which axially extends from the inserting pipe body and has the inner diameter larger than that of the inserting pipe body; the sleeve pipe body is arranged in the fixed pipe body and used for being connected outside the multi-cavity pipe in a sleeved mode, and the branch pipe body extends from the side direction of the sleeve pipe body and is used for corresponding to a supply notch of the multi-cavity pipe. The plugging piece comprises a supply cavity plug arranged close to the near end of the cannula body and is used for plugging inlets of the instrument cavity and the supply cavity in the multi-cavity tube; the sealing assembly comprises a first sealing ring which is arranged at the near end of the cannula body and is used for blocking a gap between the near end of the cannula body and the multi-cavity tube, and a second sealing ring which is arranged at the far end of the cannula body and is used for blocking a gap between the far end of the cannula body and the multi-cavity tube; and a sealing cavity communicated with the branch pipe body and the supply notch is formed between the sleeve pipe body and the multi-cavity pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a connecting device and a medical endoscope. Background Art

[0002] Existing endoscopes usually adopt a multi-lumen tube as the insertion part to realize functions such as air supply, water supply, suction, and insertion of treatment instruments through the channels inside the multi-lumen tube. When using a multi-lumen tube as the insertion part, a single-channel metal tube or plastic tube is usually used to connect the multi-lumen tube with the operation part, so as to connect the channels of the multi-lumen tube with the side ducts of the operation part through the single channel of the metal tube or plastic tube.

[0003] However, for endoscopes with different specifications or uses, the diameters of the multi-lumen tubes selected are also different, and thus the diameters of the channels of the multi-lumen tubes are also different. Therefore, during assembly, not only the diameter matching degree needs to be considered, but also the connection strength and airtightness of the tubes need to be considered. On the one hand, this will lead to low assembly efficiency, and on the other hand, it will also have a certain impact on the product yield. Especially if the connection seals between the two ends of the metal tube and the plastic tube and the channels of the multi-lumen tube and the side ducts of the operation part are not good, problems such as water leakage and air leakage are likely to occur. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a connecting device and a medical endoscope, which can solve the problems of low assembly efficiency and easy water leakage and air leakage in the prior art.

[0005] Based on this, an embodiment of the utility model discloses a connecting device for connecting a multi-lumen tube with an operation part, including:

[0006] A fixed connecting tube for being fixedly installed inside the operation part, including an insertion tube body for inserting the proximal end of the multi-lumen tube and a fixed tube body axially extending from the insertion tube body and having an inner diameter larger than that of the insertion tube body;

[0007] A sleeve tube, including a sleeve body installed inside the fixed tube body and for sleeving outside the multi-lumen tube and a branch tube body laterally extending from the sleeve body and corresponding to the supply notch of the multi-lumen tube;

[0008] A sealing member, including a supply chamber plug disposed adjacent to the proximal end of the sleeve body for blocking the inlet of the supply channel in the multi-lumen tube; and

[0009] A sealing assembly, including a first sealing ring disposed at the proximal end of the sleeve body for blocking the gap between the proximal end of the sleeve body and the multi-lumen tube and a second sealing ring disposed at the distal end of the sleeve body for blocking the gap between the distal end of the sleeve body and the multi-lumen tube, for forming a sealed chamber communicating with the branch tube body and the supply notch between the sleeve body and the multi-lumen tube.

[0010] With the above technical solution, for multi-lumen tubes with different specifications / diameters, the first sealing ring and the second sealing ring sleeved on the multi-lumen tube respectively seal the gaps between the proximal end and the distal end of the sleeve body and the multi-lumen tube, so as to form a sealed chamber communicating with the branch tube body between the connecting sleeve and the multi-lumen tube. The branch tube body communicating with the sealed chamber on the connecting sleeve can have a unified diameter, so as to be well matched and connected with the supply tube of the operating part. There is no need to select corresponding-sized plastic / metal tubes according to the specifications / diameters of the multi-lumen tube to connect the lumen of the multi-lumen tube with the supply tube, which can not only improve the assembly efficiency, but also help to ensure better connection tightness and avoid problems such as water leakage and air leakage.

[0011] According to an embodiment of the present invention, the sleeve body has a proximal inclined surface abutting against the first sealing ring and a distal inclined surface abutting against the second sealing ring. The proximal inclined surface and the distal inclined surface extend asymptotically from the outer wall of the sleeve body to the inner wall of the sleeve body.

[0012] With the above technical solution, not only can the first sealing ring and the second sealing ring be respectively positioned at the proximal end and the distal end of the sleeve body, but also the first sealing ring and the second sealing ring can be extruded and deformed towards the multi-lumen tube to achieve surface contact with the multi-lumen tube and the sleeve body respectively, which helps to achieve a good sealing effect.

[0013] According to an embodiment of the present invention, the plugging member further includes a plugging cap arranged adjacent to the proximal end of the sleeve body. The plugging cap has a first chamfered surface abutting against the first sealing ring, and the first chamfered surface extends in a tapered manner away from the sleeve body.

[0014] With the above technical solution, not only can the first sealing ring be fixed between the plugging cap and the sleeve body, but also it can cooperate with the proximal inclined surface to inwardly extrude the first sealing ring, so that the first sealing ring makes surface contact with the multi-lumen tube and the plugging cap respectively, thereby better extruding the first sealing ring towards the multi-lumen tube to achieve a better sealing effect.

[0015] According to an embodiment of the present invention, the plugging cap includes a cap body for sealing and fixing the tube body, an annular plug extending from the cap body into the tube body and providing the first chamfered surface, and a clamping block protruding outward from the annular plug; the tube body is provided with an axially extending guiding groove and a clamping groove matching with the clamping block. The branch tube body passes through the guiding groove to extend out of the tube body, and the clamping block is clamped in the clamping groove.

[0016] With the above technical solution, the annular plug that extends into the fixed pipe body can provide a first chamfered surface to squeeze the first sealing ring inward to achieve a better sealing effect; the clamping block and the clamping groove cooperate with each other to fix the sleeve pipe body and ensure that the sealing ring is in close contact with the sleeve pipe body, so that the sealing ring is in close contact with the outer wall of the multi-cavity pipe; the setting of the guiding groove can facilitate the determination of the installation direction and position of the plugging cap to improve the installation efficiency.

[0017] According to an embodiment of the present invention, the plugging member further includes an instrument cavity plug that is located within the annular plug and is used to extend into the instrument cavity of the multi-cavity pipe.

[0018] With the above technical solution, the instrument cavity plug that extends into the instrument cavity can block the inlet of the instrument cavity, and the instrument is inserted through the instrument notch on the side wall of the multi-cavity pipe.

[0019] According to an embodiment of the present invention, the fixed pipe further includes a lateral pipe body that extends laterally from the plugging pipe body and corresponds to the instrument notch of the multi-cavity pipe; the instrument cavity plug extends from the cap body to the outlet of the lateral pipe body and is used to extend to the instrument notch of the multi-cavity pipe.

[0020] With the above technical solution, when an instrument such as a surgical forceps extends into the instrument cavity of the multi-cavity pipe through the lateral pipe body, it will be blocked by the instrument cavity plug to prevent it from entering the proximal end of the multi-cavity pipe and going to the wrong position, ensuring that the instrument is inserted along the instrument cavity to the distal end of the multi-cavity pipe.

[0021] According to an embodiment of the present invention, the instrument cavity plug has a guiding end face that is inclined towards the lateral pipe body; the lateral pipe body is a bent branch pipe, the distal end of the bent branch pipe is integrally connected to the plugging pipe body, the proximal end of the bent branch pipe is arranged at an interval from the fixed pipe body, and the included angle between the center line of the bent branch pipe and the center line of the fixed pipe body gradually increases from the distal end to the proximal end; the proximal end of the bent branch pipe and the fixed pipe body are both located on the same side of the plugging pipe body.

[0022] With the above technical solution, it is convenient to better guide the medical instrument to extend from the lateral pipe body into the instrument cavity and enter the distal end of the multi-cavity pipe.

[0023] According to an embodiment of the present invention, the plugging pipe body has a second chamfered surface that abuts against the second sealing ring, and the second chamfered surface extends in a tapered manner away from the sleeve pipe body.

[0024] With the above technical solution, it can not only fix the second sealing ring between the plugging pipe body and the sleeve pipe body, but also cooperate with the distal inclined surface to squeeze the second sealing ring inward, so that the second sealing ring is in surface contact with the multi-cavity pipe and the plugging pipe body respectively, thereby better squeezing the second sealing ring towards the multi-cavity pipe to achieve a better sealing effect.

[0025] According to an embodiment of the present utility model, the fixed connection pipe further includes a pumping branch pipe fixedly arranged on the lateral pipe body and used for connecting with the pumping pipe of the operation part, a fixing groove opened on the inserting pipe body, and a fixing block protruding from the inserting pipe body; the sealing assembly further includes a sealing cap for interference fit with the multi-cavity pipe, and the sealing cap covers the distal end of the inserting pipe body.

[0026] According to another aspect of the present utility model, an embodiment of the present utility model further provides a medical endoscope, including:

[0027] An operation part;

[0028] A multi-cavity pipe; and

[0029] The connecting device as described above, the connecting device is arranged between the operation part and the multi-cavity pipe and is used for connecting the operation part and the multi-cavity pipe. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of a medical endoscope provided by an embodiment of the present utility model;

[0032] Figure 2 Shows Figure 1 A three-dimensional schematic diagram of the connecting device in the medical endoscope shown;

[0033] Figure 3 Shows Figure 2 An exploded schematic diagram of the connecting device shown;

[0034] Figure 4 Shows Figure 2 A longitudinal sectional schematic diagram of the connecting device shown;

[0035] Figure 5 Shows Figure 4 An enlarged schematic diagram of a partial area A in the connecting device shown;

[0036] Figure 6 Shows Figure 2 A transverse sectional schematic diagram of the connecting device shown;

[0037] Figure 7 Shows a three-dimensional schematic diagram of the fixed connection pipe in the connecting device according to the above embodiment of the present utility model;

[0038] Figure 8 A three-dimensional schematic diagram of a multi-lumen tube in a medical endoscope according to the above embodiment of the present invention is shown.

[0039] Reference numerals: 10, connecting device; 101, sealing chamber; 11, fixing tube; 111, inserting tube body; 1110, second chamfered surface; 112, fixing tube body; 1121, guiding groove; 1122, clamping groove; 113, lateral tube body; 1130, bending branch tube; 114, pumping branch tube; 115, fixing groove; 116, fixing block; 12, sleeve tube; 121, sleeve body; 1211, proximal inclined surface; 1212, distal inclined surface; 122, branch tube body; 13, plugging member; 130, first chamfered surface; 131, supply chamber plug; 132, plugging cap; 1321, cap body; 1322, annular plug; 1323, clamping block; 133, instrument chamber plug; 14, sealing assembly; 141, first sealing ring; 142, second sealing ring; 143, sealing cap; 20, multi-lumen tube; 201, instrument channel; 202, supply channel; 203, instrument notch; 204, supply notch; 30, operating portion; 31, supply tube; 32, pumping tube. Detailed implementation manners

[0040] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0041] In the description of the embodiments of the present invention, it should be noted that the terms "proximal" and "distal" are relative positional relationships. When an operator operates an instrument to process a target object, along this instrument, the side closer to the operator is "proximal", and the side closer to the target object is "distal".

[0042] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present invention are only for the purpose of illustration and do not represent the only implementation manner.

[0043] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one feature. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0044] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature being "above", "over" or "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" or "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0045] Unless otherwise defined, all technical and scientific terms used in the description of the present utility model have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used in the description of the present utility model includes any and all combinations of one or more of the related listed items.

[0046] Considering that when assembling existing endoscopes, not only the matching degree of the tube diameter needs to be considered, but also the connection strength and airtightness of the tubes need to be considered. On the one hand, this will result in a relatively low assembly efficiency, and on the other hand, it will also have a certain impact on the product yield. Especially if the connection sealing between the two ends of the metal tube and the plastic tube and the lumen of the multi-lumen tube and the side catheter of the operation part is not good, problems such as water leakage and air leakage are likely to occur. To solve this problem, the present utility model provides a connecting device and a medical endoscope, which can solve the problems of low assembly efficiency and easy water leakage and air leakage in the prior art.

[0047] Specifically, please refer to Figures 1 to 8 , an embodiment of the present utility model provides a medical endoscope, which may include a connecting device 10, a multi-lumen tube 20 and an operation part 30. The connecting device 10 is arranged between the operation part and the multi-lumen tube 20 and is used to connect the multi-lumen tube 20 and the operation part 30. It should be noted that, as Figure 8As shown, the multi-lumen tube 20 mentioned in the present utility model is implemented as the insertion part of a medical endoscope, which may have an instrument channel 201 and a supply channel 202 that are independent of each other, and the proximal end of the multi-lumen tube 20 may further be provided with an instrument notch 203 communicating with the instrument channel 201 and a supply notch 204 communicating with the supply channel 202. It can be understood that the multi-lumen tube 20 mentioned in the present utility model may further include a traction channel for a traction wire to pass through, an optical fiber channel for an optical fiber to pass through, etc., and the present utility model will not elaborate on this.

[0048] More specifically, as Figures 1 to 7 shown, the connecting device 10 may include a fixing pipe 11, a sleeve pipe 12, a plugging member 13, and a sealing assembly 14 for being fixedly installed within the operation part 30. The fixing pipe 11 includes an insertion pipe body 111 for the proximal end of the multi-lumen tube 20 to be inserted into and a fixing pipe body 112 axially extending from the insertion pipe body 111 and having an inner diameter larger than that of the insertion pipe body 111. The sleeve pipe 12 includes a sleeve body 121 installed within the fixing pipe body 112 and for sleeving outside the multi-lumen tube 20 and a branch pipe body 122 laterally extending from the sleeve body 121 and corresponding to the supply notch 204 of the multi-lumen tube 20. The plugging member 13 includes a supply cavity plug 131 arranged adjacent to the proximal end of the sleeve body 121 for plugging the inlet of the supply channel 202 in the multi-lumen tube 20. The sealing assembly 14 includes a first sealing ring 141 provided at the proximal end of the sleeve body 121 for plugging the gap between the proximal end of the sleeve body 121 and the multi-lumen tube 20 and a second sealing ring 142 provided at the distal end of the sleeve body 121 for plugging the gap between the distal end of the sleeve body 121 and the multi-lumen tube 20, for forming a sealed chamber 101 communicating with the branch pipe body 122 and the supply notch 204 between the sleeve body 121 and the multi-lumen tube 20. It can be understood that the inlet of the supply channel 202 mentioned in the present utility model refers to the proximal opening on the multi-lumen tube 20 communicating with the supply channel 202.

[0049] Optionally, the supply cavity plug 131 can extend into the supply channel 202 to plug the inlet of the supply channel 202, so as to perform water supply, air supply, and / or supply of liquid medicine or nutrient solution from the branch pipe body 122 via the supply notch 204.

[0050] In this way, as Figure 5 and Figure 6As shown, the connecting device 10 of the present utility model can block the gap between the proximal end of the sleeve body 121 and the multi-chamber tube 20 through the first sealing ring 141, and block the gap between the distal end of the sleeve body 121 and the multi-chamber tube 20 through the second sealing ring 142, so as to form a sealed chamber 101 communicating with the branch tube body 122 and the supply notch 204 between the sleeve body 121 and the multi-chamber tube 20; in other words, for multi-chamber tubes 20 with different specifications / diameters, the connecting device 10 of the present utility model can form a sealed chamber 101 between the sleeve body 121 and the multi-chamber tube 20, and the branch tube body 122 on the sleeve 12 communicating with the sealed chamber 101 has a unified diameter, which can be well matched and connected with the supply tube 31 of the operation part 30, without the need to select corresponding-sized plastic tubes / metal tubes according to the specifications / diameters of the multi-chamber tube 20 to connect the channels of the multi-chamber tube 20 with the supply tube 31, which can not only improve the assembly efficiency, but also help to ensure good connection tightness and avoid water leakage and air leakage problems.

[0051] It should be noted that since the first sealing ring 141 provided between the sleeve body 121 and the plugging member 13 and the second sealing ring 142 provided between the sleeve body 121 and the inserted tube body 111 are both elastic, when the first sealing ring 141 and the second sealing ring 142 are sleeved on multi-chamber tubes 20 with different specifications / diameters, they can both be tightly attached to the outer wall of the multi-chamber tube 20 under the extrusion of the sleeve body 121, so as to form a sealed chamber 101 between the sleeve body 121 and the multi-chamber tube 20, prevent water leakage and air leakage, and ensure that the connecting device 10 of the present utility model can be adapted to multi-chamber tubes 20 with different specifications / diameters.

[0052] Exemplarily, as Figure 4 and Figure 5 shown, the sleeve body 121 has a proximal inclined surface 1211 abutting against the first sealing ring 141 and a distal inclined surface 1212 abutting against the second sealing ring 142. The proximal inclined surface 1211 and the distal inclined surface 1212 extend asymptotically from the outer wall of the sleeve body 121 to the inner wall of the sleeve body 121. In this way, the first sealing ring 141 and the second sealing ring 142 can be respectively positioned at the proximal end and the distal end of the sleeve body 121; and the first sealing ring 141 and the second sealing ring 142 can be deformed under the extrusion of the multi-chamber tube 20 and the proximal inclined surface 1211 and the distal inclined surface 1212 of the sleeve body 121 to achieve surface contact with the multi-chamber tube 20 and the sleeve body 121 respectively, which helps to achieve a good sealing effect.

[0053] Optionally, as Figure 4 and Figure 5As shown, the plugging member 13 further includes a plugging cap 132 disposed adjacent to the proximal end of the sleeve body 121. The plugging cap 132 has a first chamfered surface 130 that abuts against the first sealing ring 141. The first chamfered surface 130 extends in a tapered manner away from the sleeve body 121. It can not only fix the first sealing ring 141 between the plugging member 13 and the sleeve body 121, but also cooperate with the proximal inclined surface 1211 to squeeze the first sealing ring 141 inward, so that the first sealing ring 141 makes surface contact with the multi-cavity tube 20 and the plugging member 13 respectively. Thus, the first sealing ring 141 can be better squeezed towards the multi-cavity tube 20 to achieve a better sealing effect. In other words, under the combined extrusion of the proximal inclined surface 1211 of the sleeve body 121 and the first chamfered surface 130 of the plugging member 13, the first sealing ring 141 closely adheres to the outer wall of the multi-cavity tube 20 for good sealing, preventing water leakage and air leakage problems.

[0054] Similarly, as Figure 4 and Figure 5 shown, the insertion tube body 111 has a second chamfered surface 1110 that abuts against the second sealing ring 142. The second chamfered surface 1110 extends in a tapered manner away from the sleeve body 121. It can not only fix the second sealing ring 142 between the insertion tube body 111 and the sleeve body 121, but also cooperate with the distal inclined surface 1212 to squeeze the second sealing ring 142 inward, so that the second sealing ring 142 makes surface contact with the multi-cavity tube 20 and the insertion tube body 111 respectively. Thus, the second sealing ring 142 can be better squeezed towards the multi-cavity tube 20 to achieve a better sealing effect. In other words, under the combined extrusion of the distal inclined surface 1212 of the sleeve body 121 and the second chamfered surface 1110 of the insertion tube body 111, the second sealing ring 142 closely adheres to the outer wall of the multi-cavity tube 20 for good sealing, preventing water leakage and air leakage problems.

[0055] Optionally, as Figure 2 and Figure 7 shown, the fixed tube body 112 is provided with an axially extending guide groove 1121. The branch tube body 122 passes through the guide groove 1121 to extend out of the fixed tube body 112, which is convenient for connecting with the supply tube of the operation part. At the same time, the guide groove 1121 can also conveniently determine the installation direction and installation position of the plugging member 13, so as to improve the installation efficiency.

[0056] Optionally, as Figure 3 and Figure 4As shown, the plugging cap 132 includes a cap body 1321 that plugs the fixed connection pipe body 112, an annular plug 1322 that extends from the cap body 1321 into the fixed connection pipe body 112 and provides a first chamfer surface 130, and a clamping block 1323 that protrudes outward from the annular plug 1322; the fixed connection pipe body 112 is further provided with a clamping groove 1122 that matches the clamping block 1323, and the clamping block 1323 is clamped in the clamping groove 1122 to achieve a detachable fixed connection between the plugging cap 132 and the fixed connection pipe body 112. In this way, the annular plug 1322 can extend into the fixed connection pipe body 112 and is used to sleeve outside the proximal end of the multi-lumen tube 20, and can provide the first chamfer surface 130 to squeeze the first sealing ring 141 inward to achieve a better sealing effect;

[0057] Optionally, the plugging member 13 further includes an instrument cavity plug 133 that is located within the annular plug 1322 and is used to extend into the instrument cavity 201 of the multi-lumen tube 20, so as to block the inlet of the instrument cavity 201 through the instrument cavity plug 133. In this way, the instrument cavity plug 133 extending into the instrument cavity 201 can block the inlet of the instrument cavity 201, and the instrument is inserted through the instrument notch 203 on the side wall of the multi-lumen tube 20.

[0058] Optionally, as Figure 4 shown, the fixed connection pipe 11 further includes a lateral pipe body 113 that extends laterally from the insertion connection pipe body 111 and corresponds to the instrument notch 203 of the multi-lumen tube 20; the instrument cavity plug 133 extends from the cap body 1321 to the outlet of the lateral pipe body 113 to extend to the instrument notch 203 of the multi-lumen tube 20. In this way, when an instrument such as a surgical forceps extends into the instrument cavity 201 of the multi-lumen tube 20 through the lateral pipe body 113, it will be blocked by the instrument cavity plug 133, preventing it from entering the proximal end of the multi-lumen tube 20 and going to the wrong position, ensuring that the instrument is inserted along the instrument cavity 201 to the distal end of the multi-lumen tube 20.

[0059] Optionally, as Figure 4 shown, the instrument cavity plug 133 has a guiding end face that is inclined towards the lateral pipe body 113, so as to guide the instrument extending from the lateral pipe body 113 into the distal end of the multi-lumen tube 20.

[0060] Optionally, as Figure 2 and Figure 4 shown, the lateral pipe body 113 is implemented as a bent branch pipe 1130. The distal end of the bent branch pipe 1130 is integrally connected to the insertion connection pipe body 111, the proximal end of the bent branch pipe 1130 is spaced from the fixed connection pipe body 112, and the included angle between the center line of the bent branch pipe 1130 and the center line of the fixed connection pipe body 112 gradually increases from the distal end to the proximal end; the proximal end of the bent branch pipe 1130 and the fixed connection pipe body 112 are both located on the same side of the insertion connection pipe body 111, so as to better guide the medical device to extend from the lateral pipe body 113 into the instrument cavity 201 and enter the distal end of the multi-lumen tube 20.

[0061] Preferably, the center line of the bent branch pipe 1130 is tangent to the center line of the insertion pipe body 111, that is, the included angle between the center line at the distal end of the bent branch pipe 1130 and the center line of the fixed connection pipe body 112 is equal to zero, so as to prevent the instrument channel from being bent at the connection between the bent branch pipe 1130 and the insertion pipe body 111, and to ensure that the instrument can enter the distal end of the instrument channel 201 in the multi-lumen tube 20 more smoothly from the bent branch pipe 1130.

[0062] According to the above embodiments of the present invention, as Figure 2 , Figure 4 and Figure 7 shown, the fixed connection pipe 11 may further include a pumping branch pipe 114 fixedly arranged on the lateral pipe body 113 and used for connecting with the pumping pipe 32 of the operation part 30, so as to perform suction, air supply, liquid supply, etc. along the instrument channel 201 of the multi-lumen tube 20, the lateral pipe body 113 and the pumping branch pipe 114 in sequence.

[0063] It should be noted that in order to conveniently insert the multi-lumen tube 20 into the insertion pipe body 111, there will inevitably be a gap between the insertion pipe body 111 and the multi-lumen tube 20; since the second sealing ring 142 is tightly attached to the outer wall of the multi-lumen tube 20 under the combined extrusion of the distal inclined surface 1212 of the sleeve body 121 and the second chamfered surface 1110 of the insertion pipe body 111, the gap between the proximal end of the insertion pipe body 111 and the multi-lumen tube 20 is blocked. Therefore, in order to avoid leakage from the gap between the distal end of the insertion pipe body 111 and the multi-lumen tube 20 during the pumping process, as Figures 1 to 4 shown, the sealing assembly 14 of the present invention may further include a sealing cap 143 for interference fit with the multi-lumen tube 20, and the sealing cap 143 covers the distal end of the insertion pipe body 111 to seal the gap between the distal end of the insertion pipe body 111 and the multi-lumen tube 20. It can be understood that the sealing cap 143 mentioned in the present invention can be but is not limited to being implemented as a rubber part.

[0064] In addition, as Figures 2 to 4 shown, the fixed connection pipe 11 may further include a fixing groove 115 opened on the insertion pipe body 111 and a fixing block 116 protruding from the insertion pipe body 111, which are used for fixedly connecting to the operation part 30. It can be understood that the operation part 30 of the present invention is provided with an installation part matching the fixing groove 115 and the fixing block 116, so as to install and fix the fixed connection pipe 11 of the connection device 10.

[0065] It can be understood that, in order to ensure that after the multi-lumen tube 20 is installed on the operating part through the connecting device 10, the operating part 30 can control the bending of the multi-lumen tube 20 through the traction wire and can receive the image information obtained by the camera through the optical fiber, the plugging member 13 of the present utility model has a traction wire hole and an optical fiber hole penetrating through the cap body 1321, so as to allow the traction wire and the optical fiber to pass through and extend to the operating part 30, and can also function as a wire dividing block.

[0066] Under the condition of not changing the basic principle of the present utility model, the technical features of the above embodiments can be combined. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0067] The above embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. A connecting device for connecting a multi-lumen tube to an operating portion, characterized in that, Comprising: A fixed connection tube for being fixedly installed within the operation part, including an insertion tube body for inserting the proximal end of the multi-lumen tube, and a fixed connection tube body axially extending from the insertion tube body and having an inner diameter larger than that of the insertion tube body; A sleeve connection tube, including a sleeve body installed within the fixed connection tube body and for sleeving outside the multi-lumen tube, and a branch tube body laterally extending from the sleeve body and corresponding to the supply notch of the multi-lumen tube; A plugging member, including a supply chamber plug disposed adjacent to the proximal end of the sleeve body, for plugging the inlet of the supply chamber in the multi-lumen tube; And A sealing assembly, including a first sealing ring disposed at the proximal end of the sleeve body and for plugging the gap between the proximal end of the sleeve body and the multi-lumen tube, and a second sealing ring disposed at the distal end of the sleeve body and for plugging the gap between the distal end of the sleeve body and the multi-lumen tube, for forming a sealed chamber communicating with the branch tube body and the supply notch between the sleeve body and the multi-lumen tube.

2. The connecting device according to claim 1, characterized in that, The sleeve body has a proximal inclined surface abutting against the first sealing ring and a distal inclined surface abutting against the second sealing ring, and the proximal inclined surface and the distal inclined surface asymptotically extend from the outer wall of the sleeve body to the inner wall of the sleeve body.

3. The connecting device according to claim 2, wherein The plugging member further includes a plugging cap disposed adjacent to the proximal end of the sleeve body, and the plugging cap has a first chamfered surface abutting against the first sealing ring, and the first chamfered surface extends in a tapered manner away from the sleeve body.

4. The connecting device according to claim 3, characterized in that, The plugging cap includes a cap body covering the fixed connection tube body, an annular plug extending from the cap body into the fixed connection tube body and providing the first chamfered surface, and a clamping block protruding outward from the annular plug; the fixed connection tube body is provided with an axially extending guide groove and a clamping groove matching with the clamping block, the branch tube body passes through the guide groove to extend out of the fixed connection tube body, and the clamping block is clamped in the clamping groove.

5. The connecting device according to claim 4, characterized in that, The plugging member further includes an instrument chamber plug located within the annular plug and for extending into the instrument chamber of the multi-lumen tube.

6. The connecting device according to claim 5, characterized in that, The fixed connection tube further includes a lateral tube body laterally extending from the insertion tube body and corresponding to the instrument notch of the multi-lumen tube; the instrument chamber plug extends from the cap body to the outlet of the lateral tube body for extending to the instrument notch of the multi-lumen tube.

7. The connecting device according to claim 6, characterized in that, The instrument chamber plug has a guide end face inclined towards the lateral tube body; the lateral tube body is a bent branch tube, the distal end of the bent branch tube is integrally connected to the insertion tube body, the proximal end of the bent branch tube is spaced from the fixed connection tube body, and the included angle between the center line of the bent branch tube and the center line of the fixed connection tube body gradually increases from the distal end to the proximal end; the proximal end of the bent branch tube and the fixed connection tube body are both located on the same side of the insertion tube body.

8. The connecting device according to claim 2, wherein The insertion tube body has a second chamfered surface abutting against the second sealing ring, and the second chamfered surface extends in a tapered manner away from the sleeve body.

9. The connecting device according to claim 6 or 7, characterized in that, The fixed connecting pipe further includes a pumping branch pipe fixedly arranged on the lateral pipe body and used for connecting with the pumping pipe of the operating part, a fixing groove opened on the inserting pipe body, and a fixing block protruding from the inserting pipe body; the sealing assembly further includes a sealing cap for interference fit with the multi-cavity pipe, and the sealing cap covers the distal end of the inserting pipe body.

10. Medical endoscope, characterized in that, Comprising: Operating part; Multi-cavity pipe; And The connecting device according to any one of claims 1 to 9, the connecting device is arranged between the operating part and the multi-cavity pipe for connecting the operating part and the multi-cavity pipe.

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