A pipe end cementing structure and a method of assembling a pipe

Abstract

This invention provides a tube-end adhesive bonding structure and a tube assembly method, relating to the field of endoscopic technology, and solves the problem of easy loosening of negative pressure suction tubes in existing technologies. The tube-end adhesive bonding structure of this invention includes a suction tube, a tube connector, and an adhesive column. The tube connector is inserted into one end of the suction tube via a port, and a through-hole for filling adhesive is provided on the peripheral wall of the port. At least a portion of the opening of the filling adhesive hole is blocked by the tube wall of the suction tube. The adhesive column fills the filling adhesive hole, and one end of the adhesive column is glued and fixed to the tube wall of the suction tube. Compared with existing technologies, this invention fills the filling adhesive hole of the tube connector and glues one end to the tube wall of the suction tube. The radial limiting effect of the filling adhesive hole on the adhesive column restricts the relative axial and circumferential movement of the suction tube and the tube connector. This effectively ensures a reliable connection between the ports of the suction tube and the tube connector, which is particularly significant when the tube connector has poor adhesive properties, effectively preventing the suction tube from falling off and causing leakage at the connection.

Description

Technical Field

[0001] This invention relates to the field of endoscope technology, specifically to a tube end bonding structure and a tube assembly method. Background Technology

[0002] An endoscope works by being inserted into the body through natural or man-made cavities to perform examinations or treatments. To extract diseased tissue or drain excess fluid, a negative pressure suction tube is used. The distal end of the tube is connected to one port of a tee and glued together, communicating with the instrument channel. The proximal end is connected to one port of the negative pressure suction valve and glued together, communicating with the negative pressure suction nozzle.

[0003] Currently, during the use of endoscopes, the negative pressure suction tube is prone to delamination with the corresponding port, causing the negative pressure suction tube to loosen and resulting in leakage at the connection. Summary of the Invention

[0004] The purpose of this invention is to design a tube end bonding structure and a tube assembly method to solve the problem of the negative pressure suction tube being easy to loosen.

[0005] This invention is achieved through the following technical solution:

[0006] This invention provides a tube end bonding structure, including a suction tube, a tube connector, and a glue column; the tube connector is inserted into one end of the suction tube through a port, and a through glue-filling hole is provided on the peripheral wall of the port, at least a portion of the opening of one end of the glue-filling hole is blocked by the tube wall of the suction tube; the glue column fills the glue-filling hole, and one end of the glue column is glued and fixed to the tube wall of the suction tube.

[0007] When the above-mentioned structure is adopted, the glue column fixed to the wall of the suction tube at one end fills the glue filling hole set on the tube connector. The radial limiting effect of the glue filling hole on the glue column restricts the relative axial and circumferential movement of the suction tube and the tube connector, preventing the suction tube from detaching from the port of the tube connector. This can effectively ensure a reliable connection between the port of the suction tube and the port of the tube connector. This is more significant when the tube connector has poor adhesiveness, and can effectively prevent the suction tube from falling off and causing leakage at the connection.

[0008] To further improve the realization of the present invention, the following structure is specifically adopted: the outer peripheral surface of the adhesive column is bonded and fixed to the wall of the adhesive filling hole.

[0009] When the above-mentioned structure is adopted, the glue column is bonded to the wall of the glue filling hole, which can better restrict the axial movement of the glue column. This can better limit the axial or circumferential movement of the suction tube relative to the port of the pipe connector, minimize the relative movement, and ensure a reliable connection between the suction tube and the port of the pipe connector.

[0010] To further improve the implementation of this invention, the following structure is specifically adopted: the shape of the filling hole is circular, elliptical, or polygonal.

[0011] To further improve the present invention, the following structure is adopted: the end of the suction tube is bent to one side to form a curved section, and the free end of the curved section is inserted into the port.

[0012] To further improve the implementation of the present invention, the following structure is specifically adopted: a stop seat is provided on the peripheral wall of the port, and the end of the suction tube abuts against the stop seat axially.

[0013] When the above-mentioned structure is adopted, the port of the pipe fitting uses a stop seat to axially limit the suction pipe that is inserted with it. This not only makes it easier for the suction pipe to be inserted into the specified position, but also prevents the suction pipe from moving excessively to one end, which would cause the pipe to be over-tensioned and affect the connection reliability between the suction pipe and the port of the pipe fitting.

[0014] To further improve the present invention, the following structure is adopted: the peripheral wall of the port is provided with a plurality of glue-filling holes, and all the glue-filling holes are arranged sequentially along the circumference of the port.

[0015] When the above-mentioned structure is adopted, the arrangement of multiple glue-filling holes in a circumferential sequence on the port of the pipe connector is beneficial to the uniformity of force between the suction pipe and the port of the pipe connector.

[0016] To further improve the present invention, the following structure is specifically adopted: the tube end adhesive structure further includes an adhesive wall, one end of which is adhesively bonded to the free end of the adhesive column, and the free end of the adhesive wall is adhesively bonded to the tube wall of the suction tube at the part located outside the port and abuts against the end of the port.

[0017] To further improve the present invention, the following structure is specifically adopted: the adhesive wall surrounds the port around the port axis, enclosing the peripheral wall and end of the port.

[0018] When the above-mentioned structure is adopted, the rubber wall surrounds and wraps around the port of the pipe connector, which provides better protection for the connection between the suction tube and the port. At the same time, it increases the connection area between the rubber wall and the peripheral wall of the port, thereby improving the connection reliability.

[0019] To further improve the implementation of the present invention, the following structure is specifically adopted: the free end of the adhesive wall is configured as a barb, and one side of the barb abuts against the end of the port.

[0020] When the above-mentioned structure is adopted, one end of the rubber wall abuts against the port of the pipe fitting, which further improves the connection reliability between the rubber wall and the port of the pipe fitting.

[0021] To further improve the present invention, the following structure is specifically adopted: the adhesive wall is bonded to the peripheral wall of the port.

[0022] When the above-described structure is adopted, the adhesive wall is bonded to the peripheral wall of the port, which further improves the connection reliability between the adhesive wall and the port of the pipe fitting.

[0023] To further improve the realization of the present invention, the following structure is specifically adopted: the wall thickness of the portion of the adhesive wall that is axially opposite to the adhesive column is thicker than the wall thickness of the portion located on the periphery of the adhesive column.

[0024] When the above-mentioned structure is adopted, making the wall thickness of the part of the glue wall corresponding to the glue column thicker can increase the amount of glue in that part. This allows the glue column formed by injecting glue into the glue filling hole to better expel the air in the glue filling hole, and makes the glue column in the glue filling hole more fully filled.

[0025] To further improve the present invention, the following structure is specifically adopted: the peripheral wall of the port is provided with radial protrusions, the radial protrusions abut against the wall of the suction tube radially, so that a glue injection gap is formed between two adjacent radial protrusions, the glue injection gap is connected to the glue filling hole, the glue injection gap is filled with glue, and the glue filling is glued and fixed to the glue column, the peripheral wall of the port and the wall of the suction tube respectively.

[0026] When the above-mentioned structure is adopted, the filler glue filling the glue gap formed between the peripheral wall of the pipe connector port and the suction tube is bonded and fixed to the glue column, the peripheral wall of the port, and the tube wall of the suction tube, respectively, which increases the bonding area between the pipe connector port and the suction tube and further reduces the possibility of the suction tube loosening.

[0027] To further improve the present invention, the following structure is specifically adopted: the filling hole is set as a countersunk hole at one end opposite to the wall of the suction tube, and the glue column fills the countersunk hole.

[0028] When the above-mentioned structure is adopted, the glue column formed by the injection will form a wider step structure at the end that is bonded to the wall of the suction tube, which further improves the bonding reliability between the suction tube and the port of the tube connector.

[0029] The present invention also provides a tube assembly method for assembling the above-mentioned tube end adhesive structure, comprising: inserting a suction tube into the port of a tube connector, ensuring that the tube wall of the suction tube can cover at least a portion of the opening of the filling hole provided on the peripheral wall of the port; injecting a flowable adhesive through the filling hole, ensuring that the flowable adhesive contacts the tube wall of the suction tube and fills the filling hole; and waiting for the flowable adhesive to cure, to obtain at least a glue column that fills the filling hole and at least adhesives the tube wall of the suction tube.

[0030] In this method, given the fluidity of the injected colloid, as it gradually solidifies after being injected into the filling hole of the tube connector, it will completely seal the joint between the suction tube and the tube connector through its flow, thereby improving the sealing performance and further enhancing the anti-detachment and anti-leakage effects.

[0031] To further improve the implementation of the present invention, the method further includes: adding a flowable colloid to the peripheral wall of the port, ensuring that the flowable colloid covers the peripheral wall of the port and the portion of the suction tube wall located outside the port; after the flowable colloid has cured, a colloid is obtained that wraps the peripheral wall and end of the port, with one end bonded to a glue column and the other end bonded to the glue wall of the suction tube wall located outside the port.

[0032] The present invention has the following advantages and beneficial effects:

[0033] In this invention, one end of the adhesive column is glued and fixed to the wall of the suction tube and fills the glue-filling hole provided on the tube connector. The radial limiting effect of the glue-filling hole on the adhesive column restricts the relative axial and circumferential movement of the suction tube and the tube connector, preventing the suction tube from detaching from the port of the tube connector. This can effectively ensure a reliable connection between the suction tube and the port of the tube connector, which is more significant when the tube connector has poor adhesive properties. It can effectively prevent the suction tube from falling off and causing leakage at the connection.

[0034] In addition, given the fluidity of the colloid, as it gradually solidifies after being injected into the filling hole of the tube connector, it will completely seal the joint between the suction tube and the tube connector through its flow, thereby improving the sealing performance and further enhancing the anti-detachment and anti-leakage effects. Attached Figure Description

[0035] 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.

[0036] Figure 1 The tube end bonding structure formed within the handle housing of the endoscope is shown;

[0037] Figure 2 This is a front view of the tube end bonding structure formed inside the handle housing of the endoscope;

[0038] Figure 3 The insertion structure of the suction tube and the tube connector in the tube end adhesive bonding structure is shown;

[0039] Figure 4 This is a schematic diagram of the pipe joint used as the valve body of a negative pressure suction valve.

[0040] Figure 5 This is a structural diagram of a pipe fitting used as a tee;

[0041] Figure 6 The overall structure of the glue column and glue wall is shown;

[0042] Figure 7 The connection structure between the suction tube, port, glue column, and glue wall in the tube end adhesive bonding structure is shown;

[0043] Figure 8 yes Figure 7 A magnified view of part A in the middle;

[0044] Figure 9 The structure of the glue column filling the countersunk hole is shown, and the gap between the glue columns is also shown.

[0045] The diagram is marked as follows:

[0046] 1. Suction tube; 11. Bend section;

[0047] 2. Pipe fitting; 21. Filler hole; 211. Countersunk hole; 22. Port; 221. Stop seat; 23. Radial protrusion;

[0048] 3. Adhesive column;

[0049] 4. Adhesive wall; 41. Barbed part;

[0050] 5. Injection gap; 6. Filling with adhesive. Detailed Implementation

[0051] 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.

[0052] 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.

[0053] 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.

[0054] The inventors discovered in their research that, in addition to the quality of the bonding, the adhesive properties of the negative pressure suction tube and its corresponding port are also a contributing factor to the easy detachment between them. Generally, the materials of the negative pressure suction tube and the port are different, resulting in differences in their adhesive properties. The adhesive properties of the negative pressure suction tube are good, while those of the port are poor. This makes it easy for the adhesive to detach from the port, allowing the negative pressure suction tube to easily come loose from it.

[0055] On the one hand, this application provides a tube end bonding structure for use in the connection between the negative pressure suction tube and the port in an endoscope, such as... Figures 1-9 As shown, it is specifically configured with the following structure:

[0056] In this embodiment, the tube end adhesive bonding structure includes a suction tube 1, a tube connector 2, and an adhesive column 3.

[0057] One end of the suction tube 1 is inserted into one port 22 of the pipe connector 2, forming a connection. One end of the suction tube 1 can be coaxially inserted into the hole of port 22, or it can be coaxially fitted onto the peripheral wall of port 22. The two connection methods are essentially the same. This embodiment uses... Figure 3 The following explanation will continue with the most common method shown, in which one end of the suction tube 1 is coaxially inserted into the hole of the port 22.

[0058] After one end of the suction tube 1 is inserted into one port 22 of the tube connector 2, the two are fixed together by the adhesive post 3 to prevent the suction tube 1 from coming loose.

[0059] Specifically, such as Figure 4 and Figure 5 As shown, the peripheral wall of the port 22 on the pipe connector 2, which is used to insert the suction tube 1, is provided with a filling hole 21. The filling hole 21 penetrates the peripheral wall of the port 22, and the axis of the filling hole 21 is preferably along the radial direction of the port 22, so that the hole of the port 22 is connected to the external environment on the periphery. Figure 4 and Figure 5 Two different pipe fittings 2 are shown in the figure. Figure 4 The valve body is a common type of suction valve. Figure 5 This is a common three-way valve used to guide treatment equipment.

[0060] like Figures 6-9 As shown, the adhesive column 3 fills the adhesive filling hole 21, and one end of the adhesive column 3 is glued and fixed to the wall of the suction tube 1. The other end can be recessed into the adhesive filling hole 21, or flush with or protruding from the peripheral wall of the port 22. At least a portion of the opening of one end of the adhesive filling hole 21 is blocked by the wall of the suction tube 1, so that the adhesive column 3 can be directly glued to the wall of the suction tube 1 after filling the adhesive filling hole 21. Figures 6-9 In the structure shown, one end of the filling hole 21 is completely blocked by the wall of the suction tube 1, so that the end of the glue column 3 filled into the filling hole 21 can be fully utilized and bonded to the wall of the suction tube 1.

[0061] The cylindrical shape of the glue column 3 matches the shape of the glue filling hole 21. The glue filling hole 21 can be circular, elliptical, polygonal, or other feasible hole shapes.

[0062] In this embodiment, the glue column 3, which is glued and fixed to the wall of the suction tube 1 at one end, fills the glue filling hole 21 provided on the tube connector 2. The glue filling hole 21 uses its radial limiting effect on the glue column 3 to restrict the relative axial and circumferential movement of the suction tube 1 and the tube connector 2, preventing the suction tube 1 from detaching from the port 22 of the tube connector 2. This can effectively ensure a reliable connection between the suction tube 1 and the port 22 of the tube connector 2. This is more significant when the tube connector 2 has poor adhesive properties, and can effectively prevent the suction tube from falling off and causing leakage at the connection.

[0063] According to some optional embodiments, the adhesive column 3 can be a cured colloidal column with adhesive attached to one end. The adhesive on the adhesive column 3 is made to come into contact with the wall of the suction tube 1 by inserting it into the adhesive filling hole 21, thereby achieving bonding.

[0064] Preferably, adhesive is applied to the surface of the glue column 3. After the glue column 3 is inserted into the glue-filling hole 21, the adhesive cures and bonds the surface of the column to the wall of the glue-filling hole 21. In this preferred embodiment, bonding the glue column 3 to the wall of the glue-filling hole 21 better restricts the axial movement of the glue column 3. This better restricts the axial or circumferential movement of the suction tube 1 relative to the port 22 of the pipe connector 2, minimizing relative movement and ensuring a reliable connection between the suction tube 1 and the port 22 of the pipe connector 2.

[0065] According to some optional embodiments, the adhesive column 3 is injected into the filling hole 21 by dispensing or injecting adhesive. After the adhesive cures, it forms the adhesive column 3 and is bonded and fixed to the wall of the suction tube 1. At the same time, the outer circumferential surface of the adhesive column 3 is bonded and fixed to the wall of the filling hole 21. In this embodiment, the adhesive column 3 is formed by injecting adhesive into the filling hole 21, which allows the adhesive column 3 to be bonded and fixed to both the wall of the suction tube 1 and the wall of the filling hole 21. This can effectively limit the axial movement of the adhesive column 3 by using the filling hole 21, and effectively limit the axial or circumferential movement of the suction tube 1 relative to the port 22 of the connector 2, minimizing the relative movement and ensuring a reliable connection between the suction tube 1 and the port 22 of the connector 2.

[0066] According to some optional embodiments, such as Figures 1-3 and Figure 7 As shown, the end of the suction tube 1 that is inserted into the port 22 of the pipe connector 2 is bent to one side to form a bent section 11, and the free end of the bent section 11 is inserted into the port 22.

[0067] The end of the suction tube 1 that mates with port 22 of the connector 2 is bent to one side to mate with the corresponding port 22. This is due to the internal layout structure of existing endoscopes. Common internal layout structures of endoscopes include... Figure 1 and Figure 2 As shown in the figure, the two pipe fittings 2 represent a negative pressure suction valve and a tee for guiding the treatment device. Both are located on the side of the slender handle housing. The port 22, which mates with the suction tube 1, is also positioned close to the inner wall of the handle housing to ensure a compact layout. This means that the end of the suction tube 1, which runs along the handle housing, must be bent at a certain angle towards port 22 to smoothly connect with it. Because of this bending, the adhesive between the suction tube 1 and the corresponding port 22 is prone to detachment, causing the suction tube 1 to loosen. Connecting the suction tube 1 and port 22 using adhesive columns 3 filled in the adhesive filling holes 21 improves the connection stability between the suction tube 1 and port 22, reduces the possibility of detachment, and better prevents the suction tube 1 from loosening.

[0068] According to some optional embodiments, such as Figure 4 and Figure 5As shown, at the end of its port 22, the pipe connector 2 has a stop seat 221 on its peripheral wall. Preferably, the stop seat 221 extends and closes along the circumference of the port 22 to form an annular seat.

[0069] like Figure 8 and Figure 9 As shown, the suction tube 1 is inserted into the hole of port 22, and its end is axially stopped by the stop seat 221 for limitation. In this embodiment, the stop seat 22 of the pipe connector 2 uses the stop seat 221 to axially limit the suction tube 1 that is inserted with it, which not only makes it easier for the suction tube 1 to be inserted into the specified position, but also prevents the suction tube 1 from moving excessively to one end, which would cause the pipe to be over-tightened and affect the connection reliability between the suction tube 1 and the port 22 of the pipe connector 2.

[0070] According to some optional embodiments, such as Figure 4 and Figure 5 As shown, the peripheral wall of the port 22 of the pipe connector 2 is provided with multiple glue-filling holes 21, such as the four shown in the figure. Each glue-filling hole 21 is provided with a glue column 3 to improve the connection stability between the suction tube 1 and the port 22 of the pipe connector 2. (Reference) Figures 4-6 The distribution of each glue column 3 is adapted to the distribution of the glue filling holes 21. It is preferable that all glue filling holes 21 are arranged sequentially and equally along the circumference of the port 22 to facilitate the uniformity of force between the suction tube 1 and the port 22 of the pipe connector 2.

[0071] According to some optional embodiments, such as Figures 6-9 As shown, the tube end adhesive structure is provided with an adhesive wall 4 on the basis of the adhesive column 3. One end of the adhesive wall 4 is glued to the free end of the adhesive column 3. The free end of the adhesive wall 4 crosses the port 22 of the tube connector 2, is glued to the tube wall of the suction tube 1 at the part located outside the port 22, and abuts against the end of the port 22.

[0072] Preferred, such as Figure 1 , Figure 2 and Figure 6 As shown, the adhesive wall 4 is configured as a cylindrical structure, which surrounds the port 22 around the axis of the port 22 to wrap around the peripheral wall and end of the port 22, thereby protecting the connection between the suction tube 1 and the port 22. At the same time, it increases the connection area between the adhesive wall 4 and the peripheral wall of the port 22, thereby improving the reliability of the connection between the suction tube 1 and the port 22.

[0073] Preferred, such as Figures 6-9 As shown, the free end of the adhesive wall 4 extends radially along the port 22 to form a barb portion 41. One side of the barb portion 41 axially abuts against the end of the port 22 to further improve the connection reliability between the adhesive wall 4 and the port 22 of the pipe connector 2.

[0074] Preferably, the adhesive wall 4 is formed by injection molding or by attaching adhesive to the surface of the adhesive wall, thus wrapping the adhesive wall 4 around the port 22 and bonding it to its peripheral wall, thereby improving the connection reliability between the adhesive wall 4 and the port 22 of the pipe fitting 2. It is preferable that the adhesive column 3 and the adhesive wall 4 are formed simultaneously or in stages, forming a shape such that... Figure 6 It is a whole as shown.

[0075] Preferred, such as Figure 8 As shown, the wall thickness of the part of the adhesive wall 4 that is axially opposite to the adhesive column 3 is thicker than the wall thickness of the part located on the periphery of the adhesive column 3. This can increase the amount of adhesive in the adhesive wall 4 at the point axially corresponding to the adhesive column 3, allowing the adhesive column 3 formed by injecting adhesive into the adhesive filling hole 21 to better expel the air in the adhesive filling hole 21, making the adhesive column 3 in the adhesive filling hole 21 more fully filled, which is beneficial to improving the bonding quality.

[0076] According to some optional embodiments, such as Figure 4 As shown, the inner peripheral wall of port 22 is provided with at least two radial protrusions 23, all of which are arranged sequentially along the circumference of port 22. When the suction tube 1 is coaxially inserted into the hole of port 22, the radial protrusions 23 abut against the tube wall of the suction tube 1 radially, thereby creating a gap between the suction tube 1 and the inner peripheral wall of port 22, forming a gap between two adjacent radial protrusions 23. Figure 9 The injection gap 5 is shown. This injection gap 5 is connected to the filling hole 21. During the injection of adhesive into the filling hole 21, some adhesive enters the injection gap 5 and fills it, forming a shape as shown below after curing. Figure 8 The filler 6 shown is used to bond and fix the filler 6 to the periphery of the glue column 3, the port 22 and the tube wall of the suction tube 1 respectively.

[0077] Figure 8 In the diagram, filler 6 is represented by a black solid filler block, and... Figure 9 The unfilled injection gaps in the middle can be clearly identified compared to 5.

[0078] In this embodiment, the filler 6 filling the glue gap 5 formed between the peripheral wall of the port 22 of the pipe connector 2 and the suction tube 1 is bonded and fixed to the glue column 3, the peripheral wall of the port 22 and the tube wall of the suction tube 1, respectively, which increases the bonding area between the port 22 of the pipe connector 2 and the suction tube 1, and further reduces the possibility of the suction tube loosening.

[0079] Preferably, the wall of the suction tube 1 is bonded to the inner surface of the radial protrusion 23 by an adhesive applied thereto, so that the suction tube 1 is temporarily fixed together by bonding with the radial protrusion 23 after it is inserted into the port 22, in order to facilitate subsequent operations.

[0080] According to some optional embodiments, such as Figure 5As shown, a countersunk hole 211 is machined at one end of the filling hole 21 of the pipe connector 2, and the countersunk hole 211 is directly opposite the pipe wall of the suction pipe 1. Figure 9 As shown, the adhesive column 3 fills the countersunk hole 211. Figure 9 The portion circled by the thick dashed line represents the part of the adhesive column 3 filling the countersunk hole 211. The adhesive column 3 formed by the adhesive injection will create a wider stepped structure at the end that is bonded to the wall of the suction tube 1, further improving the bonding reliability between the suction tube 1 and the port 22 of the pipe connector 2.

[0081] On the other hand, this application provides an endoscope, specifically configured as follows:

[0082] like Figure 1 and Figure 2 As shown, the endoscope includes a handle housing and a negative pressure suction valve, a three-way valve, and a suction tube 1 installed in the handle housing. Both ends of the suction tube 1 are respectively inserted into one port 22 of the negative pressure suction valve and the three-way valve. The end of the suction tube 1 and the negative pressure suction valve constitute the tube end adhesive joint structure in any of the above embodiments. The end of the suction tube 1 and the three-way valve constitute the tube end adhesive joint structure in any of the above embodiments.

[0083] On the other hand, this application provides a method for assembling a pipe, which is used to assemble the pipe end adhesive structure in any of the above embodiments, including:

[0084] Insert the end of the suction tube 1 into the port 22 of the tube connector 2 to ensure that the tube wall of the suction tube 1 can block at least part of the opening of the glue filling hole 21 provided on the peripheral wall of the port 22.

[0085] The glue column 3 is formed by injection, specifically by injecting a flowable glue through the glue filling hole 21 to ensure that the flowable glue contacts the wall of the suction tube 1 and fills the glue filling hole 21.

[0086] After the fluid colloid has cured, a column 3 is obtained that fills the filling hole 21 and bonds to the wall of the suction tube 1. One end of the column 3 is bonded and fixed to the wall of the suction tube 1, and the peripheral wall of the column 3 is bonded and fixed to the wall of the filling hole 21 of the tube connector.

[0087] Given the fluidity of the injected colloid, as it gradually cures after being injected into the filling hole of the tube connector, it will completely seal the joint between the suction tube and the tube connector through its flow, thereby improving the sealing performance and further enhancing the anti-detachment and anti-leakage effects.

[0088] The adhesive in column 3 can be a UV adhesive, which cures rapidly under light after injection.

[0089] According to some optional embodiments, a flowable colloid is added to the peripheral wall of port 22, ensuring that the flowable colloid covers the peripheral wall of port 22 and the portion of the suction tube 1 located outside port 22. After the flowable colloid cures, an adhesive wall 4 is obtained that wraps around the peripheral wall and end of port 22, ensuring that one end of the adhesive wall 4 is bonded to the adhesive column 3 and the other end is bonded to the portion of the suction tube 1 located outside port 22.

[0090] The adhesive wall 4 can be obtained by adding a flowable adhesive to the peripheral wall of the port 22 after the adhesive column 3 has cured, or it can be obtained in the same dispensing step.

[0091] The adhesive for adhesive wall 4 can be a UV adhesive, which cures rapidly under light after injection.

[0092] The adhesive wall 4 can be obtained by injecting the adhesive into a mold fitted outside the port 22, ensuring that the adhesive wall 4 can evenly wrap around the peripheral wall of the port 22 and form a barb 41 that axially abuts against the end of the port 22. Using a mold to constrain the adhesive wall 4 ensures that a thicker adhesive wall 4 can be obtained at the corresponding part of the adhesive column 3.

[0093] According to some optional embodiments, after the end of the suction tube 1 is inserted into the port 22 of the tube connector 2, a glue injection gap 5 is formed between the suction tube 1 and the port 22. When injecting glue into the glue filling hole 21, ensure that the amount of glue is sufficient so that the glue can fill the glue injection gap 5 and the glue filling hole 21, forming an integrally connected glue filling 6 and glue column 3.

[0094] According to some optional embodiments, before inserting the suction tube 1 and the port 22, an adhesive is applied to the tube wall of the suction tube 1 or the peripheral wall of the port 22. After insertion, the suction tube 1 and the port 22 are temporarily fixed together by the adhesive to facilitate the subsequent formation of the adhesive column 3.

[0095] 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. A tube end bonding structure, used in endoscopes, comprising: Suction tube (1); The pipe connector (2) is inserted into one end of the suction tube (1) through the port (22). A through filling hole (21) is provided on the peripheral wall of the port (22). At least part of the opening of one end of the filling hole (21) is blocked by the tube wall of the suction tube (1). A glue column (3) is filled in the glue filling hole (21), and one end of the glue column (3) is glued and fixed to the wall of the suction tube (1); The feature is that it further includes a glue wall (4) connected to the peripheral wall of the port (22), one end of the glue wall (4) is glued to the free end of the glue column (3), and the free end of the glue wall (4) is glued to the part of the suction tube (1) located outside the port (22) and abuts against the end of the port (22).

2. A tube end cement joint according to claim 1, characterised in that: The outer peripheral surface of the glue column (3) is glued and fixed to the hole wall of the glue filling hole (21); And / or, the shape of the filling hole (21) is circular, elliptical, or polygonal; And / or, the end of the suction tube (1) is bent to one side to form a bent section (11), and the free end of the bent section (11) is inserted into the port (22); And / or, a stop seat (221) is provided on the peripheral wall of the port (22), and the end of the suction tube (1) abuts against the stop seat (221) axially.

3. The pipe end bonding structure according to claim 1, characterized in that: The peripheral wall of the port (22) is provided with a plurality of glue-filling holes (21), and all the glue-filling holes (21) are arranged sequentially along the circumference of the port (22).

4. The pipe end adhesive bonding structure according to claim 1, characterized in that: The adhesive wall (4) surrounds the port (22) around the axis of the port (22), enclosing the peripheral wall and end of the port (22).

5. The pipe end bonding structure according to claim 1, characterized in that: The free end of the adhesive wall (4) is configured as a barb (41), and one side of the barb (41) abuts against the end of the port (22) axially.

6. The pipe end adhesive bonding structure according to claim 1, characterized in that: The adhesive wall (4) is bonded to the peripheral wall of the port (22); And / or, the wall thickness of the portion of the adhesive wall (4) that is axially opposite to the adhesive column (3) is greater than the wall thickness of the portion located on the periphery of the adhesive column (3).

7. The pipe end adhesive bonding structure according to claim 1, characterized in that: The peripheral wall of the port (22) is provided with a radial protrusion (23), which abuts radially against the wall of the suction tube (1), so that a glue injection gap (5) is formed between two adjacent radial protrusions (23). The glue injection gap (5) is connected to the glue filling hole (21), and the glue injection gap (5) is filled with glue (6). The glue filling (6) is glued and fixed to the glue column (3), the peripheral wall of the port (22), and the wall of the suction tube (1). And / or, The filling hole (21) is set as a countersunk hole (211) at one end opposite to the tube wall of the suction tube (1), and the glue column (3) fills the countersunk hole (211).

8. A method for assembling a pipe, characterized in that: For assembling the pipe end adhesive bonding structure according to any one of claims 1-7, comprising: Insert the suction tube (1) into the port (22) of the tube connector (2) to ensure that the tube wall of the suction tube (1) can block at least part of the opening of the glue filling hole (21) provided on the peripheral wall of the port (22); Inject the flowable colloid through the filling hole (21) to ensure that the flowable colloid contacts the tube wall of the suction tube (1) and fills the filling hole (21). After the fluid colloid has cured, a column of glue (3) is obtained that fills the glue-filling hole (21) and at least bonds the tube wall of the suction tube (1).

9. The tube assembly method according to claim 8, characterized in that: The assembly method of the tube further includes: Add a flowable colloid to the peripheral wall of the port (22) to ensure that the flowable colloid covers the peripheral wall of the port (22) and the part of the suction tube (1) located outside the port (22); After the fluid colloid solidifies, the peripheral wall and end of the port (22) are obtained, and one end is glued to the glue column (3), and the other end is glued to the glue wall (4) on the part of the suction tube (1) located outside the port (22).

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