Endoscopic stapling device curved segment for fundoplication

Abstract

The utility model discloses an endoscope stapling device bending section for fundus plicae, including snake bone inner core body, guide piece, top end joint and tail joint, and snake bone outer shell is wrapped to snake bone inner core body, the inside of guide piece is along the axial wear in snake bone inner core body, top end joint connects the head of snake bone inner core body, and tail joint connects the tail of snake bone inner core body, the utility model can make the bending angle of bending part accurately keep positioning 270, thereby make the top end portion of endoscope stapling device and rigid section be in the stable stapling state, to implement the minimally invasive treatment of gastroesophageal reflux disease under endoscope.

Description

Technical Field

[0001] This utility model relates to a medical device for gastroesophageal reflux disease (GERD), specifically to a curved section of an endoscopic stapler for fundoplication. Background Technology

[0002] Gastroesophageal reflux disease (GERD) refers to the reflux of excessive contents from the stomach or duodenum into the esophagus and other parts of the body, causing symptoms such as acid reflux and heartburn, and can lead to esophagitis and damage to tissues outside the esophagus, such as the pharynx, larynx, and trachea. GERD is a common disease in Western countries. Studies show that in recent years, the incidence rate of GERD in Western countries is approximately 10%–20%, in Australia it is about 11.6%, and in Asian countries it is about 5%. The incidence rate increases with age, with a peak incidence between 40 and 60 years of age. There is no difference between men and women, but men are more likely to develop reflux esophagitis than women.

[0003] With the improvement of living standards, people's demands for quality of life are also constantly increasing. According to statistics from the Chinese Society of Gastroenterology, the prevalence of gastroesophageal reflux disease (GERD) in China is 5.77%. For most patients with GERD, lifestyle changes or medication can lead to a cure. However, for patients with esophageal sphincter relaxation or hiatal hernia, some respond poorly to medication, some only experience partial symptom relief, and others require long-term medication. For these patients, surgical treatment is necessary. Studies have shown that approximately 25% to 30% of GERD patients experience poor response to medication or cannot tolerate long-term use, requiring surgical intervention. Surgical treatment for GERD typically employs laparoscopic fundoplication, endoscopic suturing, or radiofrequency ablation. While these techniques can address recurrent symptoms, postoperative complications are common, significantly impacting postoperative quality of life. Therefore, surgical treatment for GERD is not widely adopted, and patients with GERD experience a marked decline in their quality of life.

[0004] To facilitate minimally invasive endoscopic treatment of gastroesophageal reflux disease (GERD), Chinese utility model patent document CN111671480B discloses an endoscopic stapling device for performing fundoplication. This device controls the movement of its tip to fold part of the gastric fundus outside the lower esophagus and staples it together, thereby forming a new acute-angled His angle around the esophagus. This strengthens the reflux barrier at the cardia and prevents GERD. Specifically, the endoscopic stapling device includes a handle, a conical protective sleeve, an insertion tube, a rigid section, a curved section, and a tip. The front end of the handle is fixedly connected to the insertion tube via the conical protective sleeve. The front end of the insertion tube is sequentially fixedly connected to the rigid section, the curved section, and the tip. The side of the rigid section and the end of the tip form a stapling mechanism. By controlling the bending angle of the curved section with the handle, the end face of the tip can be aligned with the side of the rigid section, thus bringing the tip into a stapling state.

[0005] In the initial state, the bending angle of the curved part is 0°, and the top part, the curved part and the rigid section are on the same straight line; the front end of the endoscope stapler is inserted into the stomach through the mouth and esophagus. At this time, the internal condition of the stomach (such as the mucosal structure) can be observed through the miniature camera at the top end.

[0006] When the rigid section is located at the bottom of the esophagus, the bending angle control mechanism of the control handle causes the bending part to gradually bend, so that the tip moves relative to the rigid section, thereby changing the relative position between the end face of the tip and the side of the rigid section.

[0007] When the bending angle of the curved part reaches 180°, the end face of the tip abuts against the inner wall of part of the gastric fundus; as the bending angle of the curved part increases from 180° to 270°, the end face of the tip pushes that part of the gastric fundus toward the esophagus.

[0008] When the bending angle of the curved section is 270°, the gastric fundus of this part is pushed by the end face of the top part to overlap with the lower part of the esophagus, thereby realizing the folding of part of the gastric fundus and the esophagus; at this time, the side of the rigid section is opposite to the end face of the top part, and the ultrasonic reflector of the rigid section can reflect all the ultrasonic signals emitted by the ultrasonic detector of the top part and send the reflected ultrasonic signals to the ultrasonic detector, so the curved section bends into place and the top part is in a pinned state.

[0009] Clearly, the operator can only perform endoscopic stapler operations when the bending angle of the curved section is 270°. Existing endoscopic stapler devices control the bending angle of the curved section through a bend angle control mechanism. However, this mechanism can only vary the bending angle within the range of 0° to 270°, failing to precisely position and maintain the bending angle at 270° for extended periods. This severely impacts the accuracy of the endoscopic stapler operation. Utility Model Content

[0010] The technical problem to be solved by this utility model is to provide a curved section of an endoscopic stapler for fundoplication, which can keep the bending angle of the curved section precisely positioned at 270°, thereby greatly improving the accuracy of endoscopic stapler operation and reducing the difficulty of operation.

[0011] To solve the above-mentioned technical problems, the technical solution for the curved section of the endoscopic stapler used in fundoplication of this utility model is as follows:

[0012] The snake skeleton includes an inner core 81, a guide plate 82, a top connector 86, and a tail connector 89. The inner core 81 encloses a snake skeleton shell 72. The snake skeleton shell 72 is composed of a left snake skeleton shell 83 and a right snake skeleton shell 84. The snake skeleton shell 72 and the inner core 81 together form the snake skeleton. The inner core 81 is formed by multiple snake skeleton segment cores connected in sequence. The left snake skeleton shell 83 is formed by multiple left intermediate segment plates 131 connected in sequence. The right snake skeleton shell 84 is formed by multiple right intermediate segment plates 132 connected in sequence. Each left intermediate segment plate 131, right intermediate segment plate 132, and snake skeleton segment core together form a snake skeleton segment. Each left intermediate segment plate 131 and right intermediate segment plate 132... The snake bone segment shell is composed of: an outer bevel 72-1 formed on the outer side of the end face of the snake bone segment, and a straight surface 72-2 formed on the inner side of the end face of the snake bone segment, so that an included angle 141 is formed between the bevels 72-1 of adjacent snake bone segments, and a contact surface 142 is formed between the straight surfaces 72-2; a guide plate 82 is axially inserted into the interior of the snake bone inner core 81; a top connector 86 is connected to the head of the snake bone inner core 81; the top connector 86 is covered with a top connector shell; the top connector shell and the top connector 86 constitute the snake bone first segment 71; a tail connector 89 is connected to the tail of the snake bone inner core 81; the tail connector 89 is covered with a tail connector shell; the tail connector shell and the tail connector 89 constitute the snake bone tail segment 73.

[0013] In another embodiment, there are 22 serpentine segments; the included angle 141 between the serpentine segments is 11.7°; the included angle between the serpentine segment and the proximal segment 71 is 13°; and the included angle between the serpentine segment and the telson segment 73 is 11.3°.

[0014] In another embodiment, a plurality of radial positioning pieces 91 and tangential protrusions 92 are symmetrically arranged on both sides of the guide piece 82; the radial positioning pieces 91 extend radially, and the tangential protrusions 92 extend radially and then tangentially; the radial positioning pieces 91 and tangential protrusions 92 located on the same side are spaced apart; the radial positioning pieces 91 of the guide piece 82 match the positioning groove 121 of the snake joint inner core.

[0015] In another embodiment, the two connecting sides of the left intermediate segment 131 respectively form concave structures 135; the two sides of the left intermediate segment 131 are respectively fixedly connected to the two sides of the right intermediate segment 132 through the concave structures 135.

[0016] In another embodiment, a retaining ring 161 is formed on the outer periphery of the tail connector housing.

[0017] In another embodiment, the end face of the tail connector 89 is provided with a first positioning hole 162 and a second positioning hole 163; the connecting end face of the rigid section is formed with a first boss 164 and a second boss 165; the first boss 164 matches the first positioning hole 162, and the second boss 165 matches the second positioning hole 163.

[0018] In another embodiment, the side of the top connector 86 is formed with a first positioning boss 171 and a second positioning boss 172; the connecting end of the top part is formed with a first positioning groove 173 and a second positioning groove 174; the first positioning boss 171 matches the first positioning groove 173, and the second positioning boss 172 matches the second positioning groove 174.

[0019] In another embodiment, the two sides of the top connector 86 are formed with semi-circular grooves 176 perpendicular to the axial direction, and the semi-circular grooves 176 contain positioning pins 177; the connecting end of the top part is formed with two semi-circular grooves 175; the two positioning pins 177 pass through the semi-circular grooves 175 of the top part and the semi-circular grooves 176 of the top connector 86 to achieve circumferential positioning of the top part and the top connector 86.

[0020] In another embodiment, a connecting groove 134 is formed on one end face of the snake joint shell, and a connecting ear 133 is formed on the other end face; the connecting groove 134 and the connecting ear 133 are matched; the connecting ear 133 of a certain snake joint shell is movably disposed in the connecting groove 134 of the adjacent snake joint shell, and the connecting ear 133 can rotate relative to the connecting groove 134, thereby realizing the movable connection of adjacent snake joint shells through the movable connection of the connecting ear 133 and the connecting groove 134.

[0021] In another embodiment, the outer side of the end face of the snake joint shell forms a bevel 72-1, and the inner side of the end face forms a straight surface 72-2; an included angle 141 is formed between the bevels 72-1 of adjacent snake joint shells, and a contact surface 142 is formed between the straight surfaces 72-2.

[0022] The technical effects that this utility model can achieve are:

[0023] This invention enables the bending angle of the curved part to be precisely positioned at 270°, thereby ensuring that the top part of the endoscopic stapling device and the rigid section are in a stable stapling state, so as to carry out minimally invasive treatment of gastroesophageal reflux disease under endoscopy.

[0024] This invention can ensure that the snake bone can only bend to 270° on one side and remain in a straight line on the other side by precisely controlling the angle limit between each part when bending, thus ensuring that the endoscope will not damage the stomach when inserted.

[0025] This invention can only be straightened or precisely bent to 270° on one side, thereby ensuring the surgical safety and stapling effect of the endoscopic stapler.

[0026] This invention uses a metal guide plate to fix and connect multiple snake-bone segment inner cores into one piece, which not only makes the bending segment a whole, but also gives the bending segment strong flexibility during bending; and also gives the bending segment the function of resetting. Attached Figure Description

[0027] Those skilled in the art will understand that the following description is merely illustrative of the principles of this invention, and these principles can be applied in various ways to achieve many different alternative implementations. These descriptions are only intended to illustrate the general principles of the teachings of this invention and are not intended to limit the inventive concept disclosed herein.

[0028] Embodiments of the present invention are illustrated in conjunction with the accompanying drawings, which are incorporated in and form part of this specification, and together with the foregoing general description and the following detailed description of the drawings, serve to explain the principles of the present invention.

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0030] Figure 1 This is an exploded schematic diagram of the curved section of the endoscopic stapler device for fundoplication of the present invention.

[0031] Figure 2 This is a schematic diagram of the snake joint of this utility model;

[0032] Figure 3 This is a cross-sectional schematic diagram of the snake bone segment of this utility model;

[0033] Figure 4 This is a schematic diagram of the snake-bone joint shell of this utility model;

[0034] Figure 5 This is a schematic diagram showing the connection of multiple snake-bone shells of this utility model;

[0035] Figure 6This is a schematic diagram of the snake-bone joint inner core of this utility model;

[0036] Figure 7 This is a schematic diagram showing the connection of multiple snake-bone segment inner cores of this utility model;

[0037] Figure 8 This is a schematic diagram showing the connection of the multiple snake-bone joint inner cores of this utility model from another angle;

[0038] Figure 9 This is a schematic diagram of the bent state of the snake bone of this utility model;

[0039] Figure 10 This is a schematic diagram of the bending state of the bending segment of this utility model;

[0040] Figure 11 This is a schematic diagram of the guide plate of this utility model;

[0041] Figure 12 This is a three-dimensional schematic diagram of the curved section of this utility model;

[0042] Figure 13 This is a schematic diagram of the curved section, the top part, and the rigid section of this utility model;

[0043] Figure 14 This is a schematic diagram of the curved section, the top part, and the rigid section of this utility model from another angle;

[0044] Figure 15 This is a schematic diagram of the third angle of the curved section, the top part, and the rigid section of this utility model;

[0045] Figure 16 This is a schematic diagram of the assembly of the snake-bone joint inner core and guide plate of this utility model;

[0046] Figure 17 This is a schematic diagram of the assembly of the snake-bone joint outer shell and the snake-bone joint inner core of this utility model.

[0047] Explanation of the reference numerals in the figure:

[0048] 71 is the first segment of the snake's skeleton, and 72 is the outer shell of the snake's skeleton.

[0049] 72-1 is an inclined plane, and 72-2 is a straight plane.

[0050] 73 represents the tail segment of the snake.

[0051] 81 is the snake-bone inner core, and 82 is the guide plate.

[0052] 83 represents the left snake carapace, and 84 represents the right snake carapace.

[0053] 85 is a retaining ring, and 86 is a top connector.

[0054] 87 is the left metal top connector housing, and 88 is the right metal top connector housing.

[0055] 89 is the tail connector.

[0056] 81-1 is the first positioning boss, and 81-2 is the second positioning boss.

[0057] 81-3 is the guide plate channel.

[0058] 131 is the left intermediate segment, and 132 is the right intermediate segment.

[0059] 133 is the connecting lug, and 134 is the connecting groove.

[0060] 135 is a concave structure.

[0061] 141 is the included angle, and 142 is the contact surface.

[0062] 161 is a retaining ring, and 162 is the first positioning hole.

[0063] 163 is the second positioning hole, and 164 is the first boss.

[0064] 165 is the second boss.

[0065] 83-1 is the first positioning groove, and 83-2 is the second positioning groove.

[0066] 101 is an arc-shaped boss, and 102 is an arc-shaped groove.

[0067] 111 is a limiting groove, and 112 is a limiting boss.

[0068] 113 is a groove.

[0069] 121 is a positioning slot, and 122 is a camera cable conduit.

[0070] 124 represents water pipes.

[0071] 125 is the air conduit, and 126 is the ultrasonic transducer conduit.

[0072] 127 is a bent wire conduit, and 128 is a release wire conduit.

[0073] 129 is the main rotating shaft channel, and 1210 is the locating pin and suction pipe channel.

[0074] 1211 is the LED light wiring conduit.

[0075] 91 is a radial positioning piece, and 92 is a tangential convex piece.

[0076] 171 is the first positioning boss, and 172 is the second positioning boss.

[0077] 173 is the first positioning groove, and 174 is the second positioning groove.

[0078] 175 is a semi-circular groove, 176 is a semi-circular groove.

[0079] 177 is a locating pin. Detailed Implementation

[0080] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains. The terms "first," "second," and similar words used herein do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Words such as "comprising" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, but does not exclude other elements or objects. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0081] like Figure 1 As shown, the curved section of the endoscopic stapler for fundoplication of this invention is used to connect the rigid section and the top end of the endoscopic stapler; the curved section includes a plastic snake bone inner core 81, one side of the snake bone inner core 81 is wrapped with a left metal snake bone outer shell 83, and the other side of the snake bone inner core 81 is wrapped with a right metal snake bone outer shell 84; the left metal snake bone outer shell 83 and the right metal snake bone outer shell 84 are fixedly connected to form a metal snake bone outer shell 72, which has a channel in which the snake bone inner core 81 is fixedly inserted;

[0082] A guide plate 82 is axially inserted inside the snake bone inner core 81;

[0083] A retaining ring 85 is fitted around the outside of the snake bone inner core 81;

[0084] The head of the snake bone core 81 is connected to the top connector 86; one side of the top connector 86 is wrapped with a left metal top connector shell 87, and the other side of the top connector 86 is wrapped with a right metal top connector shell 88; the left metal top connector shell 87, the right metal top connector shell 88 and the top connector 86 constitute the snake bone head segment 71; the snake bone head segment 71 is fixedly connected to the top part of the endoscope stapler.

[0085] The tail of the snake bone core 81 is connected to the tail connector 89; one side of the tail connector 89 is wrapped with a left metal tail connector shell 810, and the other side of the tail connector 89 is wrapped with a right metal tail connector shell 811; the left metal tail connector shell 810, the right metal tail connector shell 811 and the tail connector 89 constitute the snake bone tail segment 73; the snake bone tail segment 73 is connected to the rigid section of the endoscope stapling device.

[0086] The snake bone inner core 81 is composed of multiple snake bone segment inner cores; preferably, the snake bone inner core 81 is composed of 22 snake bone segment inner cores connected in sequence.

[0087] The left metal snake-bone shell 83 is composed of a plurality of left intermediate segments 131; preferably, the left metal snake-bone shell 83 is composed of 22 left intermediate segments 131 connected in sequence.

[0088] The right metal snake skeleton shell 84 is composed of a plurality of right intermediate segments 132; preferably, the right metal snake skeleton shell 84 is composed of 22 right intermediate segments 132 connected in sequence;

[0089] like Figure 2 As shown, each left middle segment 131, right middle segment 132 and snake bone segment core form a snake bone segment; the left middle segment 131 and right middle segment 132 form the snake bone segment shell, which is used to wrap the snake bone segment core; thus, the structure of each snake bone segment is the same, so as to save the cost of making molds.

[0090] Furthermore, such as Figure 3 As shown, the two connecting sides of the left intermediate segment 131 respectively form concave structures 135, and the two sides of the left intermediate segment 131 are fixedly connected to the two sides of the right intermediate segment 132 through the concave structures 135. The concave structures 135 can make the surfaces of the left intermediate segment 131 and the right intermediate segment 132 more smooth after laser welding, so as to avoid scratching the snake bone plastic coating layer on the outer surface, thereby avoiding damage to the esophagus and improving the safety of the product.

[0091] like Figure 4 As shown, a connecting groove 134 is formed on one end face of the left intermediate segment 131 and the right intermediate segment 132, and a connecting ear 133 is formed on the other end face; the connecting groove 134 and the connecting ear 133 are matched; the connecting ear 133 of a certain snake segment shell is movably disposed in the connecting groove 134 of the adjacent snake segment shell, and the connecting ear 133 can rotate relative to the connecting groove 134, so that the adjacent snake segment shells are movably connected through the movable connection of the connecting ear 133 and the connecting groove 134;

[0092] The left middle section 131 and the right middle section 132 are respectively provided with a first positioning groove 83-1 and a second positioning groove 83-2;

[0093] The outer side of the end faces of the left intermediate segment 131 and the right intermediate segment 132 forms a bevel 72-1, and the inner side of their end faces forms a straight surface 72-2; as shown Figure 5 As shown, an angle 141 is formed between the inclined surfaces 72-1 of the adjacent serpentine shells, and a contact surface 142 is formed between the straight surfaces 72-2, so that the curved section can only bend towards the inclined side (i.e., the outer side) of the serpentine shell, and cannot bend towards the straight side (i.e., the inner side) of the serpentine shell, thereby ensuring that the endoscope will not damage the stomach when inserted.

[0094] like Figure 6 As shown, the snake-bone joint inner core includes an inner core body, a guide plate channel 81-3 is provided in the middle of the inner core body; second positioning bosses 81-2 are formed on both sides of the inner core body; positioning grooves 121 are provided on the second positioning bosses 81-2.

[0095] At least two first positioning protrusions 81-1 are formed on the outer periphery of the inner core body; the first positioning protrusions 81-1 match the first positioning grooves 83-1 of the snake-bone shell, and the second positioning protrusions 81-2 match the second positioning grooves 83-2 of the snake-bone shell.

[0096] The snake bone joint inner core is fixedly connected to the left middle segment 131 and the right middle segment 132 by the cooperation connection between the first positioning boss 81-1 and the first positioning groove 83-1, and the cooperation connection between the second positioning boss 81-2 and the second positioning groove 83-2.

[0097] like Figure 7 As shown, one end of the inner core body forms an arc-shaped boss 101, and the other end forms an arc-shaped groove 102; the arc-shaped boss 101 and the arc-shaped groove 102 of the adjacent snake-bone joint inner cores are connected to form a concave-convex coupling buckle; the snake-bone joint inner core of this utility model achieves a movable connection through the concave-convex coupling buckle, which can make the relative rotation between adjacent snake-bone joint inner cores smoother, so as to ensure the bending performance of the bending section; at the same time, the concave-convex coupling buckle can also limit the axial displacement between adjacent snake-bone joint inner cores, preventing adjacent snake-bone joint inner cores from separating;

[0098] Meanwhile, a limiting groove 111 is formed at one end of the inner core body, and a limiting boss 112 is formed at the other end; the limiting groove 111 and the limiting boss 112 of the adjacent snake bone segment inner core match each other so that the snake bone inner core 81 can maintain the consistency of movement during the movement and prevent it from falling off during the movement.

[0099] Correspondingly, the outer side of the end face of the inner core body is formed with an inclined surface, and the inner side of its end face is formed with a straight surface, so that the outer side of the end faces of adjacent snake joint inner cores form an angle and the inner side of the end faces contact each other; so that the snake joint inner core 81 can only bend outward and not inward; thus, the snake joint can only bend outward and not inward.

[0100] like Figure 8 As shown, the outer periphery of the inner core body is provided with an axially extending groove 113; the groove 113 can be combined with the inner wall of the snake bone shell to form a traction channel, through which the traction steel wire can pass.

[0101] This invention features a traction channel on the inner core of the snake bone segment, which can constrain the traction wire within the traction channel. Since the traction channel is formed by the groove 113 of the inner core of the snake bone segment and the inner wall of the snake bone shell 72, the traction channel can keep the traction wire close to the inner wall of the snake bone shell 72 and consistent with the extension direction of the central axis of the snake bone structure, so that the traction wire can effectively control the bending and straightening of the snake bone structure.

[0102] Similarly, the connection method between the snake bone segment and the snake bone head segment 71 and snake bone tail segment 73 of this utility model is the same as the connection method between adjacent snake bone segments, so it will not be described again.

[0103] Preferably, there are 22 serpentine segments; the included angle a3 between serpentine segments is 11.7°; the included angle a2 between a serpentine segment and the first serpentine segment 71 is 13°; and the included angle a1 between a serpentine segment and the tail serpentine segment 73 is 11.3°, so that the maximum bending angle of the curved segment is accurate to 270°.

[0104] Pulling the traction wire rope causes the arc-shaped protrusion 101 of the snake bone segment's inner core to rotate outward relative to the arc-shaped groove 102 due to the included angle 141 formed on the outer side of the end face. Simultaneously, the connecting ear 133 of the snake bone segment's outer shell rotates outward relative to the connecting groove 134, thus causing the snake bone to bend outward. Figure 10 As shown;

[0105] When the snake bone bends outward until the angle between the inclined plane 72-1 and the straight plane 72-2 is zero, the adjacent snake bones limit each other, and the snake bone can no longer bend. At this point, the snake bone reaches its maximum bending angle of 270 degrees. Figure 10 As shown; at this time, the arc-shaped boss 112 and the arc-shaped groove 111 form a limit, so that the rotation of the snake bone joint stops, thereby enabling the snake bone to maintain this curved state;

[0106] like Figure 3As shown, the inner core of the snake-bone joint has multiple axially extending and independent channels, including a water pipe 124, an air pipe 125, a camera cable pipe 122, an ultrasonic cable pipe 126, a bent steel wire pipe 127, a release steel wire pipe 128, a rotating spindle pipe 129, a positioning pin and suction pipe channel 1210, and an LED light cable pipe 1211. These are used to thread water and air pipes, camera cables, ultrasonic cables, bent steel wires, release steel wires, rotating spindles, and positioning pins, respectively, to prevent the cables and wires from tangling when the snake-bone joint is bent, which would cause the water and air pipes to bend and the ultrasonic cables, LED light cables, and camera cables to be damaged.

[0107] like Figure 11 As shown, multiple radial positioning pieces 91 and tangential protrusions 92 are symmetrically arranged on both sides of the guide piece 82; the radial positioning pieces 91 extend radially, and the tangential protrusions 92 extend radially and then tangentially; the radial positioning pieces 91 and tangential protrusions 92 located on the same side are arranged at intervals.

[0108] The radial positioning piece 91 of the guide piece 82 matches the positioning groove 121 of the snake joint inner core so that the radial positioning piece 91 can be inserted into the positioning groove 121; through the cooperation and connection between the positioning groove 121 and the radial positioning piece 91, the positioning connection between the snake joint inner core and the guide piece 82 is realized, thereby ensuring the stability of the connection between the two and avoiding the snake joint from falling off and causing harm to the patient.

[0109] This invention inserts multiple snake-bone segment inner cores onto a guide plate 82, which connects the snake-bone segment inner cores and the snake-bone segment outer shell into one unit, ensuring that the snake bone is a whole, with strong flexibility when bent, and also has a repositioning function.

[0110] Preferably, such as Figure 12 As shown, retaining rings 161 are formed on the outer periphery of the left metal tail connector housing 810 and the right metal tail connector housing 811; when the snake tail segment 73 is connected to the rigid section, the retaining rings 161 can adjust the position between the rigid section and the snake tail segment 73.

[0111] The end face of the tail connector 89 is provided with a first positioning hole 162 and a second positioning hole 163; correspondingly, as Figure 13 As shown, the connecting end face of the rigid section has a first boss 164 and a second boss 165; the positioning hole and the boss are connected to achieve positioning between the tail connector 89 and the rigid section, thereby making the assembly fast and accurate.

[0112] Preferably, such as Figure 14 As shown, a first positioning boss 171 and a second positioning boss 172 are formed on the side of the top connector 86; correspondingly, a first positioning groove 173 and a second positioning groove 174 are formed at the connecting end of the top part.

[0113] The top connector 86 has semi-circular grooves 176 perpendicular to the axial direction formed on both sides, and the semi-circular grooves 176 contain positioning pins 177; correspondingly, the connecting end of the top part has two semi-circular grooves 175; the two positioning pins 177 pass through the semi-circular grooves 175 of the top part and the semi-circular grooves 176 of the top connector 86, thereby realizing the circumferential positioning of the top part and the top connector 86.

[0114] This utility model achieves circumferential positioning connection between the top connector 86 and the top part by cooperating with two positioning bosses and positioning grooves; and achieves assembly and fixation between the top part and the curved section by two positioning pins 177. This assembly method is simple and convenient, and can quickly and accurately achieve positioning and installation of the top part and the curved section, thereby improving assembly efficiency and assembly accuracy.

[0115] The present invention relates to a method for manufacturing the curved section of an endoscopic stapler for fundoplication, comprising the following steps:

[0116] First, fix the top connector 86 to the head end of the guide plate 82; then insert the guide plate 82 into the guide plate channel 81-3 of the snake joint inner core; adjust the relative position of the snake joint inner core and the guide plate 82 along the axial direction so that the radial positioning piece 91 of the guide plate 82 is inserted into the positioning groove 121 of the snake joint inner core, thereby achieving a fixed connection between the snake joint inner core and the guide plate 82; then fix multiple snake joint inner cores onto the guide plate 82 in sequence.

[0117] The second step is to insert the first positioning grooves 83-1 of the multiple left intermediate segments 131 into the first positioning bosses 81-1 of the snake bone segment core in sequence, and to insert the second positioning grooves 83-2 of the multiple left intermediate segments 131 into the second positioning bosses 81-2 of the snake bone segment core in sequence.

[0118] The first positioning grooves 83-1 of multiple right intermediate segments 132 are sequentially inserted into the first positioning boss 81-1 of the snake bone joint inner core, and the second positioning grooves 83-2 of multiple right intermediate segments 132 are inserted into the second positioning boss 81-2 of the snake bone joint inner core.

[0119] Then, the multiple tangential protrusions 92 of the guide plate 82 are welded and fixed to the multiple left intermediate segments 131 and right intermediate segments 132 respectively; thus realizing the fixed connection between the snake bone shell 72 and the snake bone segment inner core.

[0120] The third step is to weld and fix the concave structure 135 of the multiple left intermediate segments 131 to the multiple right intermediate segments 132 respectively, so as to fix the left metal snake shell 83 composed of the multiple left intermediate segments 131 and the right metal snake shell 84 composed of the multiple right intermediate segments 132 into one piece.

[0121] Then, the tangential protrusions 92 of the guide plate 82 are welded to the left metal snake shell 83 and the right metal snake shell 84 respectively, so as to fix the guide plate 82 to the left metal snake shell 83 and the right metal snake shell 84 into a whole to ensure a stable connection.

[0122] The fourth step is to fix the tail connector 89 to the tail end of the guide plate 82.

[0123] The assembly of the snake-bone outer shell 72 and the snake-bone segment inner core of this utility model is convenient and quick, and the assembly accuracy is high. Specifically, this utility model ensures the assembly accuracy and strength between each snake-bone segment inner core and each snake-bone outer shell 72 by means of the cooperation between the first positioning groove 83-1 and the first positioning boss 81-1, and the second positioning groove 83-2 and the second positioning boss 81-2, which has the positioning groove 121, and the second positioning boss 81-2 with the positioning groove 121 and the second positioning groove 83-2. This allows the bending section to be bent accurately to 270°. By ensuring the accuracy of the bending angle, this utility model ensures the fastening effect of the endoscope stapler.

[0124] The radial positioning piece 91 of the guide piece 82 of this utility model passes through the inner core of the snake joint and is connected to the outer shell 72 of the snake joint; the tangential protrusion 92 of the guide piece 82 passes through the inner core of the snake joint and is welded and fixed to the outer shell 72 of the snake joint to ensure a firm assembly.

[0125] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A curved section of an endoscopic stapler for fundoplication, characterized in that, include: The snake bone core is encased in a snake bone shell. The snake skeleton shell is composed of a left snake skeleton shell and a right snake skeleton shell; the snake skeleton shell and the snake skeleton core form the snake skeleton; the snake skeleton core is formed by multiple snake skeleton segment cores connected in sequence; the left snake skeleton shell is formed by multiple left intermediate segments connected in sequence; the right snake skeleton shell is formed by multiple right intermediate segments connected in sequence; each left intermediate segment, right intermediate segment, and snake skeleton segment core forms a snake skeleton segment; each left intermediate segment and right intermediate segment form a snake skeleton segment shell; the outer side of the end face of the snake skeleton segment forms an inclined surface, and the inner side of the end face of the snake skeleton segment forms a straight surface, so that the inclined surfaces of adjacent snake skeleton segments form an included angle, and the straight surfaces form a contact surface; The guide plate is axially inserted inside the snake-bone inner core; A top connector connects to the head of the snake bone core; the top connector is enclosed by a top connector shell; the top connector shell and the top connector together form the first segment of the snake bone; and A tail connector connects to the tail end of the snake bone core; the tail connector is enclosed by a tail connector shell; the tail connector shell and the tail connector together form the snake bone tail segment.

2. The curved section of the endoscopic stapler for fundoplication according to claim 1, characterized in that, The number of serpentine segments is 22; the included angle between the serpentine segments is 11.7°; the included angle between the serpentine segment and the proximal segment is 13°; and the included angle between the serpentine segment and the telson segment is 11.3°.

3. The curved section of the endoscopic stapler for fundoplication according to claim 1, characterized in that, Multiple radial positioning plates and tangential protrusions are symmetrically arranged on both sides of the guide plate; the radial positioning plates extend radially, and the tangential protrusions extend radially and then tangentially; the radial positioning plates and tangential protrusions on the same side are spaced apart; the radial positioning plates of the guide plate match the positioning grooves of the snake joint inner core.

4. The curved section of the endoscopic stapler for fundoplication according to claim 1, characterized in that, The two connecting sides of the left intermediate segment form concave structures; the two sides of the left intermediate segment are fixedly connected to the two sides of the right intermediate segment through the concave structures.

5. The curved section of the endoscopic stapler for fundoplication according to claim 1, characterized in that, A retaining ring is formed on the outer periphery of the tail connector housing.

6. The curved section of the endoscopic stapler for fundoplication according to claim 1 or 5, characterized in that, The end face of the tail connector is provided with a first positioning hole and a second positioning hole; the connecting end face of the rigid section is provided with a first boss and a second boss; the first boss matches the first positioning hole, and the second boss matches the second positioning hole.

7. The curved section of the endoscopic stapler for fundoplication according to claim 1, characterized in that, The top connector has a first positioning boss and a second positioning boss on its side; the top connecting end has a first positioning groove and a second positioning groove; the first positioning boss matches the first positioning groove, and the second positioning boss matches the second positioning groove.

8. The curved section of the endoscopic stapler for fundoplication according to claim 1 or 7, characterized in that, The top connector has semi-circular grooves perpendicular to the axial direction on both sides, and positioning pins are placed in the semi-circular grooves; the connecting end of the top part has two semi-circular grooves; the two positioning pins pass through the semi-circular grooves of the top part and the semi-circular grooves of the top connector to achieve circumferential positioning of the top part and the top connector.

9. The curved section of the endoscopic stapler for fundoplication according to claim 1, characterized in that, One end face of the snake-bone shell is formed with a connecting groove, and the other end face is formed with a connecting ear; the connecting groove and the connecting ear are matched; the connecting ear of a certain snake-bone shell is movably disposed in the connecting groove of the adjacent snake-bone shell, and the connecting ear can rotate relative to the connecting groove, thereby realizing the movable connection of adjacent snake-bone shells through the movable connection of the connecting ear and the connecting groove.

10. The curved section of the endoscopic stapler for fundoplication according to claim 1 or 9, characterized in that, The outer side of the end face of the snake bone segment shell forms an inclined surface, and the inner side of its end face forms a straight surface; an included angle is formed between the inclined surfaces of adjacent snake bone segment shells, and a contact surface is formed between the straight surfaces.

Images