A disposable head cap and endoscope

Abstract

The application relates to the technical field of endoscopes, and particularly discloses a disposable head-end cap, which comprises a window part, a containing groove formed in the top of the disposable head-end cap and having an opening facing inwards, at least one side wall of the containing groove being arranged adjacent to a hanging rod, a hook comprising a cantilever and a second clamping hook, the cantilever extending inwards from the side wall of the containing groove which is arranged adjacent to the hanging rod, the second clamping hook being arranged at the free end of the cantilever and protruding towards the direction of the first clamping hook, and a destructible structure, at least part of the structure being located in the bottom wall of the containing groove. The disposable head-end cap is formed by injection molding, and the containing groove further comprises a space for avoiding the mold for forming the second clamping hook. The disposable head-end cap provided by the application can separate the metal part leaking out of the head-end part, so that burns caused by a high-frequency electric knife to the human body can be avoided. The space for avoiding the mold can provide a demolding space for the forming of the second clamping hook, so that the forming of the second clamping hook is facilitated. The application further provides an endoscope, which also has the above technical effects.

Description

Technical Field

[0001] This application relates to the field of endoscopy technology, and more specifically, to a disposable end cap and endoscope. Background Technology

[0002] Doctors often use endoscopic instruments during gastrointestinal examinations and treatments. The part of a typical endoscope that enters the body is a slender insertion section. This insertion section consists of a graduated insertion tube, a flexible section that can swing in different directions, and a rigid tip that provides feedback on diagnostic information. The tip integrates functions such as illumination, image transmission, water and air delivery, and manipulation of instruments. Its structure is relatively complex and rigid. Therefore, a flexible tip cap is needed to cover the tip to prevent injury from the rigid edges.

[0003] After use in clinical medicine, endoscopes must be cleaned and disinfected. The complex tip section is particularly difficult to clean and disinfect due to the presence of the tip cap, often requiring the cap to be removed for thorough cleaning before reinstallation. To facilitate cleaning and disinfection and avoid the cumbersome process of cleaning and disinfecting the tip cap separately, some existing technologies use disposable tip caps. These disposable tip caps are installed on the endoscope tip using a snap-fit ​​mechanism, which is simple to operate. Simply align the snap-fit ​​of the disposable tip cap with the corresponding locking part on the tip for reliable assembly. Disassembly is achieved by directly breaking the disposable tip cap to remove it.

[0004] To facilitate the fabrication of a hook (with the engaging surface facing upwards) for engaging with the hanging rod at the tip, the disposable cap has a through groove at its top. However, this groove exposes the top (metal structure) of the hanging rod. During ERCP (endoscopic retrograde cholangiopancreatography), when using a high-frequency electrosurgical unit, current can easily travel through the cutting blade wire to the exposed portion of the hanging rod, potentially causing burns to the patient's digestive tract tissues.

[0005] In summary, how to improve the ease of processing the head cap while avoiding exposing the metal structure at the head end is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of this application is to provide a disposable head cap and endoscope. The structural design of the disposable head cap and endoscope can effectively solve the problem of improving the ease of processing the head cap while avoiding the exposure of the metal structure at the head end.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A disposable head cap for fitting around the outer periphery of the head end of a side-viewing endoscope, wherein a hanging rod is provided at the top of the head end, and a first hook is formed at the end of the hanging rod; the disposable head cap comprises:

[0009] A window portion, formed on the side of the disposable head cap, is used to expose the working area of ​​the head end;

[0010] A receiving groove is formed on the top of the disposable head cap and opens inward to receive the hanging rod, and at least one side wall of the receiving groove is disposed adjacent to the hanging rod;

[0011] The hook includes a cantilever and a second hook. The cantilever extends inward from the side wall adjacent to the hanging rod in the receiving groove. The second hook is disposed at the free end of the cantilever and protrudes in the direction of the second hook to be engaged with the first hook.

[0012] The destructible structure, at least a portion of which is located within the bottom wall of the receiving groove, is configured to be destroyed under external force to release the locking action between the second hook and the first hook.

[0013] The disposable head cap is injection molded, and the receiving groove also includes clearance space for the mold for forming the second hook to exit.

[0014] Optionally, the receiving groove in the disposable head cap includes a first sidewall and a second sidewall arranged adjacent to each other, and the hanging rod is received in the corner formed by the first sidewall and the second sidewall;

[0015] The cantilever extends inward from the first sidewall and the second sidewall to form an L-shaped structure, and the second hook is disposed at the corner of the L-shaped structure.

[0016] Optionally, in the above-mentioned disposable head cap, the destructible structure includes:

[0017] A shearing section, which is connected to the top edge of the window portion, is provided for shearing and destruction;

[0018] The fractured portion is connected to the shearing portion, and at least part of its structure is located within the bottom wall of the receiving groove. The wall thickness of the fractured portion is less than the wall thickness at other locations on the top of the disposable head cap. This allows the second hook to release its locking action against the first hook by fracturing the bottom wall of the receiving groove after the shearing portion is sheared and destroyed.

[0019] Optionally, in the above-mentioned disposable head cap, the fracture portion includes the bottom wall of the receiving groove;

[0020] And / or,

[0021] The fracture portion includes a thin-walled portion with a wall thickness thinner than the bottom wall of the receiving groove, the thin-walled portion being connected to the shearing portion and extending into the bottom wall of the receiving groove.

[0022] Optionally, in the disposable head cap described above, the portion of the thin-walled part extending into the bottom wall of the receiving groove does not coincide with the projection of the second hook onto the bottom wall.

[0023] Optionally, in the above-mentioned disposable head cap, the wall thickness of the thin-walled portion gradually increases from the end near the sheared portion to the end away from the sheared portion.

[0024] Optionally, in the above-mentioned disposable head cap, the thin-walled portion includes a curved segment.

[0025] And / or,

[0026] The thin-walled portion includes at least two straight segments, with adjacent straight segments extending in different directions.

[0027] Optionally, in the above-mentioned disposable head cap, when the thin-walled portion includes at least two straight segments, the extending direction of at least one of the straight segments is orthogonal to the direction of releasing the locking effect of the second hook and the first hook.

[0028] Optionally, in the above-mentioned disposable head cap, the thin-walled portion includes a first straight segment and a second straight segment. The first straight segment is connected to the shearing portion and extends along the shearing direction of the shearing portion. The second straight segment is connected to the first straight segment, and the extension direction of the second straight segment is orthogonal to the direction of releasing the locking effect of the second hook and the first hook.

[0029] Optionally, in the above-mentioned disposable head cap, the thin-walled portion includes a plurality of recesses arranged according to a predetermined path; or, the thin-walled portion includes a strip groove with a predetermined shape.

[0030] Optionally, in the above-mentioned disposable head cap, the top of the disposable head cap has two reinforcing ribs extending inward on the side near the window, and the shear portion is formed between the two reinforcing ribs.

[0031] Optionally, in the above disposable head cap, the two reinforcing ribs define the shearing direction of the shearing part as: towards the hanging rod and outside the lifting space of the lifting clamp located within the head end.

[0032] Optionally, in the above-mentioned disposable head cap, when the disposable head cap is fitted onto the outer periphery of the head end, the shearing portion deviates from the hanging rod by a predetermined distance along its shearing direction.

[0033] Optionally, in the above-mentioned disposable head cap, the bottom of the shearing part includes a shearing guide groove with an inverted V-shaped or trapezoidal cross-section.

[0034] Optionally, in the disposable head cap described above, the width of the top of the shearing guide groove is less than the thickness of the shearing component used to destroy the shearing section.

[0035] Optionally, in the above-mentioned disposable head cap, when the disposable head cap is fitted onto the outer periphery of the head end, the gap between the bottom wall of the receiving groove and the top end of the hanging rod is less than or equal to 0.1 mm.

[0036] Optionally, in the above-mentioned disposable head cap, the disposable head cap is a transparent or semi-transparent component.

[0037] The disposable end cap provided in this application has an inwardly facing accommodating groove with a cantilever and a second hook. The cantilever extends inward from the side wall adjacent to the hanging rod in the accommodating groove. The second hook is located at the free end of the cantilever and protrudes towards the first hook of the hanging rod. During installation, the disposable end cap is aligned with the end of the endoscope, and the end cap is pressed down, causing the hanging rod at the top of the end to insert into the accommodating groove. The first hook at the end of the hanging rod engages with the second hook of the disposable end cap, thereby achieving axial locking of the disposable end cap. During disassembly, external force breaks the destructible structure of the disposable end cap. Since this destructible structure is at least partially located within the bottom wall of the accommodating groove, when the destructible structure is broken, the bottom wall of the accommodating groove is also broken, thereby releasing the locking effect between the second hook and the first hook, allowing the disposable end cap to be removed.

[0038] In summary, the disposable end cap provided in this application is easy to install and remove, and its destructive method effectively prevents the reuse of the disposable end cap, ensuring that each case uses a brand new disposable end cap, thereby ensuring the level of clinical medical hygiene. Furthermore, the disposable end cap eliminates the need for separate cleaning and disinfection of the end cap itself; it can be installed directly when using the endoscope, providing convenience for endoscopic clinical diagnosis and treatment. The top of the disposable end cap is sealed, thus preventing the exposed metal part at the end of the cap from causing burns to the human body when using a high-frequency electrosurgical unit. The receiving groove also includes clearance space for the mold to retract when forming the second hook; that is, the clearance space provides demolding space for the forming of the second hook, facilitating the forming of the second hook and improving the processing convenience of the disposable end cap.

[0039] To achieve the above objectives, this application also provides an endoscope comprising any of the aforementioned disposable tip caps. Since the disposable tip caps possess the aforementioned technical effects, the endoscope having the disposable tip cap should also possess the corresponding technical effects. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of an endoscope according to a specific embodiment of this application;

[0042] Figure 2 This is a schematic diagram showing the fit between the disposable head cap and the head end.

[0043] Figure 3 This is a schematic diagram showing the assembly state of the disposable head cap and the head end.

[0044] Figure 4 This is a schematic diagram of the structure of a disposable head cap according to a specific embodiment of this application;

[0045] Figure 5 for Figure 4 The front view of the disposable head cap shown;

[0046] Figure 6 for Figure 5 A top view of the disposable head cap shown;

[0047] Figure 7 for Figure 5 A bottom view of the disposable head cap shown;

[0048] Figure 8 This is a schematic diagram of the structure of a disposable head cap according to another specific embodiment of this application;

[0049] Figure 9 This is a schematic diagram of the structure of a disposable head cap according to another specific embodiment of this application;

[0050] Figure 10 This is a schematic diagram of the structure of a disposable head cap according to another specific embodiment of this application;

[0051] Figure 11 This is a schematic diagram of the structure of a disposable head cap according to another specific embodiment of this application;

[0052] Figure 12 This is a schematic diagram of the structure of a disposable head cap according to another specific embodiment of this application;

[0053] Figure 13 for Figure 12 A magnified view of part A;

[0054] Figure 14 for Figure 13 A bottom view;

[0055] Figure 15 for Figure 3 A magnified view of part B;

[0056] Figure 16 for Figure 3 Top view;

[0057] Figure 17 for Figure 16 A schematic diagram of the AA section.

[0058] The following labels are shown in the attached diagram:

[0059] Insertion part 100, operation part 200, light guide part 300, head end 110, bending part 120, insertion tube 130, light guide hose 400; image transmission system 111, lighting system 112, water and air nozzle 113, lifting clamp 114, hanging rod 115, first hook 1151, and slot 116.

[0060] Window section 1, receiving groove 2, hook 3, cantilever 31, second hook 32, destructible structure 4, clearance space 5, reinforcing rib 6, notch 7, third hook 8;

[0061] First sidewall 21, second sidewall 22;

[0062] Shearing section 41, fracture section 42, thin-walled section 421, first straight segment 4211, second straight segment 4212, shearing guide groove 411. Detailed Implementation

[0063] This application discloses an endoscope and a disposable head cap, which improves the ease of processing the head cap while avoiding exposing the metal structure at the head end.

[0064] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0065] This application provides an endoscope, specifically a side-viewing endoscope, which may include, but is not limited to, a duodenal endoscope.

[0066] Specifically, please refer to Figure 1The endoscope may include, but is not limited to, an insertion section 100, an operation section 200, and a light guide section 300. The insertion section 100 includes a graduated insertion tube 130, a bendable section 120 capable of swinging in different directions, and a rigid tip 110 for providing diagnostic feedback. The operation section 200 is located proximal to the insertion section 100, allowing the operator to hold and control the endoscope's functions, such as controlling the bendable section 120, controlling the camera device within the tip 110 for recording, and performing air and / or water delivery operations. Specifically, it may include a suction structure, an instrument inlet, a smart button, and a lever for controlling the bendable section 120. The light guide section 300 is connected to the operation section 200 via a flexible light guide tube 400, and is used to connect to the endoscope's light source and processing device to transmit illumination light, endoscope image signals, endoscope control signals, and electrical signals.

[0067] Specifically, the head end 110 integrates functions such as lighting, imaging, air / water supply, and clamp tool manipulation. Specifically, the head end 110 includes a first mounting base and a second mounting base. The first mounting base has a water / air nozzle 113, an image transmission system 111, and a lighting system 112 arranged sequentially along the axial direction. The second mounting base contains a rotating arm. A receiving space is formed between the first and second mounting bases to accommodate a lifting clamp 114. The lifting clamp 114 can rotate around a pivot axis within this receiving space under the drive of the rotating arm (i.e., be lifted or lowered). A hanging rod 115 is provided at the top of the head end 110 (specifically, the top of the first mounting base). A first hook 1151 is formed at the end of the hanging rod 115, protruding from a hook 3 to provide a locking function. Its specific shape can be set as needed and is not limited here.

[0068] Furthermore, such as Figure 2 As shown in Figure 3, the endoscope provided in this application also includes a disposable head cap, which is a plastic part formed by injection molding. It covers the outer periphery of the head end 110 and exposes the working areas such as the image transmission system 111, the lighting system 112, and the lifting clamp 114 in the head end 110, so as to avoid injury to the human body from the rigid edges of the head end.

[0069] Specifically, please refer to Figures 4-7 , Figure 4 This is a schematic diagram of the structure of a disposable head cap according to a specific embodiment of this application; Figure 5 for Figure 4 The front view of the disposable head cap shown; Figure 6 for Figure 5 A top view of the disposable head cap shown; Figure 7 for Figure 5 The image shows a bottom view of a disposable head cap.

[0070] In one specific embodiment, the disposable head cap has a window 1, a receiving groove 2, a hook 3, and a destructible structure 4. The window 1 is formed on the side of the disposable head cap to expose the working area of ​​the head tip 110. The working area may include, but is not limited to, functional areas such as the image transmission system 111, the lighting system 112, and the movement space of the lifting clamp 114 of the head tip 110. The edge of the window 1 may be matched with the head tip base of the head tip.

[0071] A receiving groove 2 is formed on the top of the disposable head cap, with an inward opening to accommodate the hanging rod 115. At least one side wall of the receiving groove 2 is adjacent to the hanging rod 115. Thus, when the disposable head cap is installed on the head end, the hanging rod 115 is inserted into the receiving groove 2 through the opening. Because the opening is inward, the top of the disposable head cap can be closed, thereby isolating the exposed metal portion of the head end. The proximity of at least one side wall of the receiving groove 2 to the hanging rod 115 provides positioning for the hanging rod 115 and facilitates locking.

[0072] The hook 3 includes a cantilever 31 and a second hook 32. The cantilever 31 extends inward from the side wall adjacent to the hanging rod 115 in the receiving groove 2. The second hook 32 is located at the free end of the cantilever 31 and protrudes towards the first hook 1151 to engage with it. The cantilever 31 extends inward from the open end of the side wall adjacent to the hanging rod 115 in the receiving groove 2. It can be understood that it and the side wall of the receiving groove 2 can be either an integrally formed structure or a separate structure connected by a conventional fixing method. The second hook 32 is located at the free end of the cantilever 31, and its specific shape is correspondingly set according to the shape of the first hook 1151 at the head end. The second hook 32 and the cantilever 31 can be either an integrally formed structure or a separate structure connected by a conventional fixing method. Furthermore, it can be understood that in this application, when there are at least two sidewalls in the receiving groove 2 that are adjacent to the hanging rod 115, the cantilever 31 can extend inward from any one or more sidewalls that are adjacent to the hanging rod 115.

[0073] At least a portion of the destructible structure 4 is located within the bottom wall of the receiving groove 2 and is configured to be destroyed under external force to release the locking action between the second hook 32 and the first hook 1151. The form of the destructible structure 4 is not specifically limited here; it may include only the easily breakable fracture portion 42 described later, as long as it can destroy the bottom wall of the receiving groove 2, thereby releasing the locking action between the two hooks. Alternatively, the destructible structure 4 may also include the fracture portion 42 and a shear portion 41 disposed between the fracture portion 42 and the window portion 1 to increase the static strength of the fracture portion 42, making it less prone to breakage during installation.

[0074] The disposable head cap is injection molded. The receiving groove 2 also includes a clearance space 5 for the mold used to form the second hook 32 to exit. During the injection molding of this disposable head cap, the mold used to form the second hook 32 can be moved from its position corresponding to the second hook 32 to the clearance space 5 during demolding, thereby eliminating the interference between the second hook 32 and the mold, and allowing the mold to be removed. Specifically, in at least one direction, the width of the receiving groove 2 is greater than twice the width of the second hook 32. Thus, the interference between the mold and the second hook 32 can be eliminated by translating the mold along this direction, thereby allowing the mold to be removed.

[0075] Using the disposable end cap provided in this application, the opening of the receiving groove 2 faces inward and has a cantilever 31 and a second hook 32. The cantilever 31 extends inward from the side wall of the receiving groove 2 adjacent to the hanging rod 115. The second hook 32 is located at the free end of the cantilever 31 and protrudes toward the first hook 1151 of the hanging rod 115. During installation, the receiving groove 2 of the disposable end cap is aligned with the hanging rod 115 of the end of the endoscope (specifically, the side wall of the receiving groove 2 with the cantilever 31 extending therefrom is aligned with the corresponding side wall of the hanging rod 115). The disposable end cap is pressed down, and the cantilever 31 deforms due to the interference between the second hook 32 and the side wall of the hanging rod 115 until the second hook 32 is locked with the first hook 1151 at the end of the hanging rod 115. The cantilever 31 returns to its initial shape, thereby achieving axial locking between the disposable end cap and the end of the endoscope. During disassembly, external force breaks the destructible structure 4 of the disposable head cap. Since the destructible structure is at least partially located inside the bottom wall of the receiving groove, when the destructible structure is broken, the bottom wall of the receiving groove is also broken, thereby releasing the locking effect of the second hook 32 and the first hook 1151, and the disposable head cap can be removed.

[0076] In summary, the disposable end cap provided in this application is easy to install and remove, and its destructive nature effectively prevents reuse, ensuring that each case uses a brand new disposable end cap, thereby ensuring the level of clinical medical hygiene. Furthermore, the disposable end cap eliminates the need for separate cleaning and disinfection; it can be installed directly when using the endoscope, facilitating endoscopic clinical diagnosis and treatment. The top of the disposable end cap is sealed, preventing any exposed metal parts from the end cap and avoiding burns to the human body when using a high-frequency electrosurgical unit. The receiving groove 2 also includes a clearance space 5 for the mold to retract when forming the second hook 32; that is, the clearance space 5 provides demolding space for the molding of the second hook 32, facilitating its formation and improving the processing convenience of the disposable end cap.

[0077] In some embodiments, the receiving groove 2 includes a first sidewall 21 and a second sidewall 22 arranged adjacent to each other, and the hanging rod 115 is received in the corner formed by the first sidewall 21 and the second sidewall 22; the cantilever 31 extends inward from the first sidewall 21 and the second sidewall 22 to form an L-shaped structure, and the second hook 32 is disposed at the corner of the L-shaped structure. It should be noted that the cantilever 31 can start from a partial position of the first sidewall 21 / second sidewall 22 and extend inward, or it can extend completely inward from the first sidewall 21 / second sidewall 22, as long as it ultimately presents an L-shaped structure, this application does not make a specific limitation. The first sidewall 21 and the second sidewall 22 can provide positioning and guidance for the hanging rod 115, and the second hook 32 is disposed at the corner of the L-shaped structure formed by the cantilever 31. The L-shaped structure formed by the cantilever 31 extending inward from the first sidewall 21 and the second sidewall 22 is a semi-open structure, which can generate a certain elastic deformation during installation, so as to facilitate the assembly of the disposable head cap to the head end of the endoscope. Meanwhile, after the disposable head cap is installed in place, the hanging rod 115 at the head end can provide circumferential fixation for the cantilever 31, which can improve the static strength of the cantilever 31 and thus enhance the installation stability of the disposable head cap. Furthermore, the sidewalls of the receiving groove 2 and the cantilever 31 can reinforce the bottom wall of the receiving groove 2, ensuring the overall structural stability and reliability of the disposable head cap. In other embodiments, the cantilever 31 can also adopt a positioning wall structure with four closed sides. To facilitate the deformation of the cantilever 31, it can specifically be a thin-walled structure.

[0078] During installation, the disposable head cap is guided by the alignment of the first sidewall 21 and the second sidewall 22 with the position of the hanging rod 115. The disposable head cap is pressed downwards, causing the hanging rod 115 to slide along the first sidewall 21 and the second sidewall 22. Since at least the second hook 32 and / or the cantilever 31 near the second hook 32 is made of a plastically deformable material, during the pressing down of the disposable head cap, the second hook 32 interferes with the hanging rod 115, causing deformation of the second hook 32 or the cantilever 31 near the second hook 32. When the disposable head cap is pressed down until the second hook 32 aligns with the first hook 1151 of the hanging rod 115, the structural interference disappears, the elastic deformation disappears, and the deformed portion springs back, i.e., the first hook 1151 and the second hook 32 are locked together.

[0079] In some embodiments, the destructible structure 4 includes a shearing portion 41 and a fracture portion 42. The shearing portion 41 is connected to the top edge of the window portion 1 for shearing destruction; the fracture portion 42 is connected to the shearing portion 41, and at least part of the structure is located within the bottom wall of the receiving groove 2. The wall thickness of the fracture portion 42 is less than the wall thickness at other locations on the top of the disposable cap, so that after the shearing portion 41 is sheared, the bottom wall of the receiving groove 2 is broken by fracture, thereby releasing the locking action between the second hook 32 and the first hook 1151.

[0080] Specifically, in this embodiment, to improve the ease of disassembly, the wall thickness of the destructible structure 4 is relatively thin. If it is directly connected to the edge of the window portion 1, especially when the coverage area of ​​the destructible structure 4 is wide, it is prone to breakage during the installation or use of the disposable cap. Therefore, a shearing portion 41 is provided between the fracture portion 42 and the window portion 1, which can improve the static strength of the fracture portion 42, making it less likely to break during installation. At the same time, it can prevent the receiving groove 2 from being stretched open, thus ensuring the reliability of the disposable cap. In addition, the shearing portion 41 serves as the starting point for destroying the disposable cap. When the shearing portion 41 is destroyed, the fracture portion 42 will break, and it can be torn open with a small force along the broken edge of the fracture portion 42, causing the first hook 1151 and the second hook 32 to disengage, thereby completing the disassembly of the cap. Specifically, the second hook 32 is also within the space enclosed by the receiving groove 2. When at least part of the structure of the fracture part 42 is located within the receiving groove 2, the distance between the fracture part 42 and the second hook 32 is closer. Therefore, after the fracture part 42 breaks, it is easier to release the locking effect between the second hook 32 and the first hook 1151.

[0081] In some embodiments, the fracture portion 42 includes the bottom wall of the receiving groove 2. That is, the wall thickness of the bottom wall of the receiving groove 2 is less than the wall thickness at other locations on the top of the disposable cap. Therefore, after the shearing portion 41 is sheared and broken, the bottom wall of the receiving groove 2 can fracture accordingly, thereby releasing the locking effect between the second hook 32 and the first hook 1151. Using the bottom wall of the receiving groove 2 as the fracture portion 42 results in a simple structure, easy molding, and convenient processing.

[0082] Please see Figure 8 In some embodiments, the fracture portion 42 includes a thin-walled portion 421 with a wall thickness thinner than the bottom wall of the receiving groove 2. The thin-walled portion 421 is connected to the shearing portion 41 and extends into the bottom wall of the receiving groove 2. That is, a thin-walled portion 421 is provided on the bottom wall of the receiving groove 2. Because of its thinner thickness, it is easier to automatically break with the shearing portion 41, thereby improving the tearability of the disposable cap. After the shearing portion 41 is sheared and broken, the thin-walled portion 421 breaks at the connection point with the shearing portion 41. Since the thin-walled portion 421 extends into the bottom wall of the receiving groove 2, its breakage correspondingly releases the locking action between the second hook 32 and the first hook 1151.

[0083] In some other embodiments, in order to ensure the destructibility of the disposable head cap, the fracture portion 42 may include both the bottom wall of the receiving groove 2 (whose wall thickness is thinner than that of other locations on the disposable head cap) and a thin-walled portion 421 with a wall thickness thinner than that of the bottom wall of the receiving groove 2. The thin-walled portion 421 is connected to the shearing portion 41 and extends into the bottom wall of the receiving groove 2.

[0084] In some embodiments, the portion of the thin-walled portion 421 extending into the bottom wall of the receiving groove 2 does not coincide with the projection of the second hook 32 on the bottom wall. During injection molding, a protrusion is typically provided at the top of the mold to form a groove-shaped thin-walled portion 421 on the bottom wall of the receiving groove 2. If the projection of the thin-walled portion 421 and the second hook 32 on the bottom wall overlaps, the top of the mold will be embedded in the thin-walled portion 421, making demolding difficult by shifting the mold position. Therefore, in this embodiment, ensuring that the portion of the thin-walled portion 421 extending into the bottom wall of the receiving groove 2 does not coincide with the projection of the second hook 32 on the bottom wall further facilitates demolding and reduces processing difficulty.

[0085] In some embodiments, the wall thickness of the thin-walled portion 421 gradually increases from one end near the shear portion 41 to the other end away from the shear portion 41. The gradually varying thickness of the thin-walled portion 421 can improve the static strength of the disposable cap, wherein the end near the shear portion 41 is thinner and can break more easily.

[0086] In some embodiments, the thin-walled portion 421 includes curved segments, and / or the thin-walled portion 421 includes at least two straight segments, with adjacent straight segments extending in different directions. That is, the extension direction of the thin-walled portion 421 is irregular, which can avoid stress concentration and improve the static strength of the thin-walled portion 421. Specifically, the irregular direction is manifested as non-single straight segments.

[0087] In some embodiments, when the thin-walled portion 421 includes at least two straight segments, the extending direction of at least one straight segment is the direction in which the locking action of the second hook 32 and the first hook 1151 is released (e.g., ...). Figure 8 The direction indicated by the double-headed arrows is orthogonal. Specifically, the extension direction of at least one straight segment is parallel to the edge of the second hook 32 near the straight segment. The thin-walled portion 421 allows cracks to grow along a predetermined path, i.e., along the direction of the thin-walled portion 421, after the shear portion 41 is damaged. Therefore, by setting the thin-walled portion 421 in the above direction, the failure of the first hook 1151 and the second hook 32 can be aggravated, thereby improving the convenience of removing the disposable head cap.

[0088] Specifically, such as Figure 8As shown, in some embodiments, the thin-walled portion 421 may include a first straight segment 4211 and a second straight segment 4212. The first straight segment 4211 is connected to the shear portion 41 and extends along the shearing direction of the shear portion 41. The second straight segment 4212 is connected to the first straight segment 4211, and the extension direction of the second straight segment 4212 is orthogonal to the direction of releasing the locking effect of the second hook 32 and the first hook 1151. Therefore, after the shear portion 41 is destroyed, the first straight segment 4211, being connected to the shear portion 41, can break along with the cracking of the shear portion 41. Cracks grow along the first straight segment 4211 and the second straight segment 4212. After the second straight segment 4212 breaks, the locking effect of the first hook 1151 and the second hook 32 is released.

[0089] Please see Figure 9 In some embodiments, the thin-walled portion 421 includes a plurality of recesses arranged along a predetermined path; or, please refer to Figure 8 The thin-walled portion 421 includes a strip-shaped groove with a predetermined shape. That is, the thin-walled portion 421 can be thinned intermittently by means of recesses, or continuously by means of strip-shaped grooves. The recesses or strip-shaped grooves can be provided on the inner wall surface of the bottom wall of the receiving groove 2, such as... Figure 8 and Figure 9 As shown, it can also be set on the outer wall surface of the bottom wall of the receiving groove 2, that is, the top outer surface of the disposable head end face, such as... Figure 10 As shown. The specific predetermined shape can be set as needed, such as a V-shaped or U-shaped cross-section, etc., without specific limitations here. The shape and size of the recesses can be set as needed. The predetermined path is the direction of the thin-walled portion 421. If the thin-walled portion 421 includes straight or curved segments, then the predetermined path will correspondingly include straight or curved paths. It can be understood that multiple recesses arranged according to the predetermined path means that the overall distribution of multiple recesses conforms to the preset path, which can be in multiple rows and columns or discretely distributed, rather than multiple recesses being distributed sequentially along the preset path. Compared with strip grooves, the form of multiple recesses can provide stronger static strength. By controlling the size, density, and distribution of multiple recesses, a balance can be achieved between static strength and the requirement for easy tearing and disassembly.

[0090] Please see Figure 4 In some embodiments, the top of the disposable head cap has two reinforcing ribs 6 extending inward on the side near the window portion 1, and the shear portion 41 is formed between the two reinforcing ribs 6. The two reinforcing ribs 6 enhance the static strength of the shear portion 41, preventing it from breaking during installation of the disposable head cap. Simultaneously, the two reinforcing ribs 6 limit the shearing direction of the shear portion 41, allowing it to be broken from a defined location when the disposable head cap is damaged.

[0091] In some embodiments, the two reinforcing ribs 6 define the shearing direction of the shearing portion 41 as being towards the hanging rod 115 and outside the lifting space of the lifting forceps 114 located within the head end. The lifting space of the lifting forceps 114 refers to the space through which the lifting forceps 114 passes when switching between a folded state and a raised state. Since the two reinforcing ribs 6 define the shearing direction of the shearing portion 41 as being towards the hanging rod 115 and outside the lifting space of the lifting forceps 114, when the shearing portion 41 is destroyed using a shearing component such as surgical scissors, the operation is performed outside the lifting space of the lifting forceps 114. This avoids interference between the shearing component such as surgical scissors and the lifting forceps 114 when destroying the disposable head cap. Therefore, the shearing portion 41 can be sheared and destroyed without obstruction without adjusting the lifting position of the lifting forceps 114, improving the ease of disassembly.

[0092] In some embodiments, such as Figure 15 As shown, when the disposable head cap is placed around the outer periphery of the head end, the cutting part 41 is offset from the hanging rod 115 by a predetermined distance along its cutting direction. The specific size of the predetermined distance can be set as needed and is not specifically limited here. By setting the cutting part 41 to be offset from the hanging rod 115 by a predetermined distance, it is possible to prevent the hanging rod 115 or the surgical scissors from being damaged or worn when the surgical scissors break the cutting part 41 and come into contact with it. At the same time, it is also easier to apply force.

[0093] Please see Figure 11 In some embodiments, the bottom of the shearing section 41 includes a shearing guide groove 411 with an inverted V-shaped or trapezoidal cross-section. The shearing guide groove 411 can further reduce the difficulty of damaging the shearing section 41, and at the same time guide the surgical scissors to coincide with the thin-walled section 421, further improving the convenience of removing the disposable cap.

[0094] Please see Figure 12 and Figure 13In some embodiments, the width of the top of the shearing guide groove 411 is less than the thickness of the shearing component (e.g., surgical scissors) used to destroy the shearing section 41. The top of the shearing guide groove 411 is either the pointed corner of an inverted V or the top of a trapezoid. Since the width of the top of the shearing guide groove 411 is less than the thickness of the shearing component, the opposing side walls of the shearing guide groove 411 abut against the shearing component that destroys the shearing section 41, and therefore the shearing component does not act directly on the top of the shearing guide groove 411. When the shearing component performs shearing, it applies force through two points of impact to achieve shearing. The shear guide groove 411, with its as described above configuration, has a small space that cannot accommodate the shearing component. The first impact point L1 of the shearing component is located at the top of the shear section 41, and the second impact point L2 is located in the shear guide groove 411 and acts on both side walls of the shear guide groove 411. Thus, the shear guide groove 411 can simultaneously promote the application of force at the second impact point L2 of the shearing component. The shearing component exerts forces F1 and F2 on the shear guide groove 411. These forces, in addition to jointly forming a shearing force in the X direction, also form a decomposed force in the Y direction, jointly promoting the fracture of the shear section 41. Furthermore, by adjusting the dimensions of the shear guide groove 411 and the relationship between its space and the dimensions of the shearing component, the effect of directly causing the entire fracture section 42 to fracture can be achieved. For details, please refer to [link to relevant documentation]. Figure 14 The starting point of the thin-walled portion 421 is close to the shear guide groove 411, which can improve the tearability of the disposable cap.

[0095] Please see Figure 15 In some embodiments, when the disposable head cap is fitted onto the outer periphery of the head end, the gap between the bottom wall of the receiving groove 2 and the top of the hanging rod 115 is less than or equal to 0.1 mm. With this configuration, the hanging rod 115 can further support the bottom of the receiving groove 2, further improving the reliability of the thin-walled structure at this corresponding position during operation.

[0096] Please see Figure 16 and Figure 17 In one embodiment, the sidewall of the disposable head cap has a third hook 8 for engaging with the head end. By providing the third hook 8 on the sidewall of the disposable head cap, the engagement of the third hook 8 with the head end, combined with the engagement of the first hook 1151 and the second hook 32, further improves the reliability of the disposable head cap installation. Specifically, the third hook 8 can be a protrusion, that is, a protrusion extending from the sidewall of the disposable head cap, and a corresponding groove 116 is provided on the head end (see...). Figure 2(As shown). At least the third hook 8 and / or the sidewall of the disposable head cap near the third hook 8 is a plastically deformable material. During the pressing down of the disposable head cap, the third hook 8 interferes with the head end and causes deformation of the third hook 8 or the sidewall of the disposable head cap near the third hook 8. When the disposable head cap is pressed down until the third hook 8 corresponds to the slot 116 of the head end, the structural interference disappears, the elastic deformation disappears, and the deformed part rebounds, that is, the third hook 8 is locked with the slot 116. During disassembly, external force can destroy structure 4. At the same time as the locking effect of the first hook 1151 and the second hook 32 is released, the locking effect of the third hook 8 is also released, so that the disposable head cap can be disassembled. Specifically, the third hook 8 and the second hook 32 are deformed in opposite directions due to force interference during the installation of the disposable head cap. In other embodiments, other shapes of hooks or other structures can also be provided on the head end to lock with the third hook 8. The shape of the third hook 8 can be set accordingly.

[0097] In one embodiment, the locking positions of the second hook 32 and the third hook 8 are both planar, and their normals are parallel, thereby ensuring the stability of the locking.

[0098] In some embodiments, the disposable head cap is a transparent or semi-transparent component. This allows for easy observation of the relative position of the disposable head cap and the head end during assembly, facilitating the positioning and installation of the disposable head cap.

[0099] In one embodiment, the disposable head cap is made of plastic, which is prone to elastic and plastic deformation. On the one hand, it can deform during assembly and rebound after assembly to maintain a reliable and stable installation of the disposable head cap. On the other hand, during disassembly, a slight force can be applied to break the structure 4 apart while deforming outwards, providing more space for the head end to detach. When the third hook 8 is provided, a slight force is applied to both sides, which can deform the parts connected to the second hook 32 and the third hook 8 outwards, providing more space for the head end to detach, achieving the effect of easy disassembly.

[0100] In one embodiment, the bottom of the disposable head cap is provided with a notch 7, thereby giving the bottom of the disposable head cap a certain degree of elasticity, which further facilitates installation.

[0101] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0102] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A disposable head cap for fitting around the outer periphery of a head end (110) of a side-viewing endoscope, a hanger bar (115) being provided at the top end of the head end (110), an end portion of the hanger bar (115) being formed with a first hook (1151), characterized in that, The disposable head cap comprises: a window portion (1) formed on the side of the disposable head cap for exposing the working area of the head portion (110); a receiving groove (2) formed on the top of the disposable head cap and opening inwardly for accommodating the hanging rod (115), at least one side wall of the receiving groove (2) being arranged adjacent to the hanging rod (115); a hook (3) comprising a cantilever (31) and a second hook (32), the cantilever (31) extending inwardly from the side wall of the receiving groove (2) arranged adjacent to the hanging rod (115), the second hook (32) being arranged on the free end of the cantilever (31) and protruding towards the direction of the first hook (1151) for being clamped with the first hook (1151); a destructible structure (4) at least partially arranged in the bottom wall of the receiving groove (2) and configured to be destructed under the action of external force to release the clamping action of the second hook (32) and the first hook (1151); The disposable head cap is formed by injection molding, the receiving groove (2) further comprises a clearance space (5) for the mold to exit for forming the second hook (32), and the width of the receiving groove (2) is greater than 2 times the width of the second hook (32) in at least one direction.

2. The disposable head cap of claim 1, wherein, The receiving groove (2) comprises a first side wall (21) and a second side wall (22) arranged adjacent to each other, and the hanging rod (115) is accommodated in the corner formed by the first side wall (21) and the second side wall (22); The cantilever (31) extends inwardly from the first side wall (21) and the second side wall (22) to form an L-shaped structure, and the second hook (32) is arranged at the corner of the L-shaped structure.

3. The disposable head cap of claim 1, wherein, The destructible structure (4) comprises: a shearing portion (41) connected with the top edge of the window portion (1) for shearing destruction; a breaking portion (42) connected with the shearing portion (41) and at least partially arranged in the bottom wall of the receiving groove (2), the wall thickness of the breaking portion (42) being smaller than the wall thickness of other positions of the top of the disposable head cap, so that after the shearing portion (41) is sheared, the bottom wall of the receiving groove (2) is broken by the breaking portion (42), and then the clamping action of the second hook (32) and the first hook (1151) is released.

4. The disposable head cap of claim 3, wherein, The breaking portion (42) comprises the bottom wall of the receiving groove (2); and / or, The breaking portion (42) comprises a thin wall portion (421) with a wall thickness smaller than the bottom wall of the receiving groove (2), the thin wall portion (421) being connected with the shearing portion (41) and extending into the bottom wall of the receiving groove (2).

5. The disposable head cap of claim 4, wherein, The part of the thin wall portion (421) extending into the bottom wall of the receiving groove (2) does not coincide with the projection of the second hook (32) on the bottom wall.

6. The disposable head cap of claim 4, wherein, The wall thickness of the thin wall portion (421) gradually increases from one end close to the shearing portion (41) to the other end away from the shearing portion (41).

7. The disposable head cap of claim 4, wherein, The thin wall portion (421) comprises a curved segment, and / or, The thin-wall portion (421) comprises at least two straight-line segments, and the extension directions of adjacent two straight-line segments are different.

8. The disposable head cap of claim 7, wherein, When the thin-wall portion (421) comprises at least two straight-line segments, the extension direction of at least one straight-line segment is orthogonal to the direction in which the second hook (32) and the first hook (1151) are released from the clamping action.

9. The disposable head cap of claim 8, wherein, The thin-wall portion (421) comprises a first straight-line segment (4211) and a second straight-line segment (4212), the first straight-line segment (4211) is connected with the shearing portion (41) and extends along the shearing direction of the shearing portion (41), and the second straight-line segment (4212) is connected with the first straight-line segment (4211), and the extension direction of the second straight-line segment (4212) is orthogonal to the direction in which the second hook (32) and the first hook (1151) are released from the clamping action.

10. The disposable head cap of claim 4, wherein, The thin-wall portion (421) comprises a plurality of pits arranged along a predetermined path, or the thin-wall portion (421) comprises a strip-shaped groove with a predetermined shape.

11. The disposable head cap of claim 3, wherein, The top end of the disposable head-end cap extends inwardly on the side close to the window portion (1) and has two reinforcing ribs (6), and the shearing portion (41) is formed between the two reinforcing ribs (6).

12. The single-use head cap of claim 11, wherein, The shearing direction of the shearing portion (41) defined by the two reinforcing ribs (6) is towards the hanger rod (115) and is outside the lifting space of the lifter in the head-end portion (110).

13. The disposable head cap of claim 3, wherein, When the disposable head-end cap is sleeved on the outer periphery of the head-end portion (110), the shearing portion (41) deviates from the hanger rod (115) by a predetermined distance along the shearing direction thereof.

14. The disposable head cap of claim 3, wherein, The bottom of the shearing portion (41) comprises a shearing guide groove (411) with an inverted V-shaped or trapezoidal cross section.

15. The single-use head cap of claim 14, wherein, The width of the top of the shearing guide groove (411) is smaller than the thickness of the shearing component used to break the shearing portion (41).

16. The disposable head cap of claim 1, wherein, When the disposable head-end cap is sleeved on the outer periphery of the head-end portion (110), the gap between the bottom wall of the accommodating groove (2) and the top end of the hanger rod (115) is less than or equal to 0.1 mm.

17. The disposable head cap of any one of claims 1-16, wherein, The disposable head-end cap is a transparent or translucent component.

18. An endoscope, characterized by Comprise: a head-end portion, the top end of which is provided with a hanger rod, and the end of the hanger rod is formed with a first hook; The disposable head-end cap according to any one of claims 1-17, which is sleeved on the outer periphery of the head-end portion.

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