Stoma base plate trimming device

Abstract

The utility model relates to the technical field of stoma base plate cutting, and discloses a stoma base plate trimming device which comprises a central shaft rod, a main body sliding rod, a positioning cylinder, an action structure and a cutting mechanism, and the central shaft rod is used for being axially sleeved and matched with a middle round hole of a stoma base plate and axially attached and positioned; the main body sliding rod is located at the first end of the center shaft rod and arranged in the radial direction of the center shaft rod. The action structure is slidably and adjustably arranged on the main body sliding rod to form a first sliding mechanism, the cutting mechanism is arranged on the action structure, and the cutting mechanism is used for being arranged towards the stoma base plate so that cutting can be conveniently conducted on the stoma base plate; the positioning cylinder is arranged on the action structure, the positioning cylinder is parallel to the main body sliding rod, and the positioning cylinder is arranged towards the central shaft rod and is in sliding fit with the main body positioning hole in the central shaft rod to form a second sliding mechanism. The cutting size of the opening can be accurately controlled through the action structure, positioning is accurate, and the structure is simple.

Description

Stoma base trimming device Technical Field

[0001] This utility model relates to the field of stoma base cutting technology, and in particular, to a stoma base trimming device. Background Technology

[0002] An ostomy bag is a medical aid used to collect human excrement (such as urine and feces), and is mainly suitable for patients with anorectal, urethral, ​​or double-lumen ostomies. Existing ostomy bags usually consist of a base plate and a plastic bag, and can be divided into two types according to their structure: (1) a two-piece structure, that is, the base plate and the plastic bag can be separated; (2) a one-piece structure, that is, the base plate and the plastic bag are fixedly connected and cannot be separated.

[0003] When using an ostomy bag, first measure the diameter of the patient's stoma, then cut the round hole in the center of the base plate to match the size of the stoma, and then attach the base plate to the skin surface to expose the stoma and connect the plastic bag to collect excrement. To ensure comfort and reduce skin damage, the edge of the base plate opening must be smooth, and the size of the opening must be precisely adjusted according to the individual needs of the patient.

[0004] The cutting of the circular hole in the center of the existing stoma tray is generally done manually. Operators mark the tray according to the measured stoma dimensions and then cut manually. Some auxiliary cutting tools exist, which cut by moving a blade in a circular motion after fixing the tray. However, these tools lack a fixed positioning reference and the cutting process lacks stability, making it difficult to meet the requirements of "keeping the edges of the tray opening smooth and precisely adjusting the opening size according to individual patient needs." Furthermore, when dealing with "one-piece structures," it is difficult to simultaneously adapt to the positioning and cutting of both "two-piece structures" and "one-piece structures" because it is impossible to separate the tray from the stoma bag and only position and cut the tray. Summary of the Invention

[0005] This utility model provides a stoma base plate trimming device, which can accurately control the cutting size of the opening through the action structure. It has accurate positioning, simple structure, and convenient operation. It is applicable to the cutting of the base plate opening in stoma bags with one-piece and two-piece structures, so as to solve the technical problems of poor cutting positioning accuracy and poor cutting stability of the round hole in the middle of the base plate.

[0006] This utility model provides a stoma base trimming device, including a central shaft, a main slide rod, a positioning cylinder, an actuating structure, and a cutting mechanism. The central shaft is used to axially engage and position itself in axial contact with the central circular hole of the stoma base. The main slide rod is located at the first end of the central shaft and is arranged radially along the central shaft. The actuating structure is slidably and adjustablely arranged on the main slide rod, forming a first sliding mechanism. The cutting mechanism is arranged on the actuating structure and is positioned towards the stoma base to facilitate cutting the stoma base. The positioning cylinder is arranged on the actuating structure, parallel to the main slide rod, and facing the central shaft, slidingly engaging with the main positioning hole on the central shaft, forming a second sliding mechanism.

[0007] Furthermore, the second end of the central shaft is provided with a chassis positioning ring, and the fixed support arm is located at the end of the second end of the central shaft to form an L-shaped structure. A sleeve groove is formed between the chassis positioning ring and the fixed support arm for fitting the stoma chassis and positioning the stoma chassis with the chassis positioning ring. The fixed support arm is arranged perpendicularly to the central shaft, and the fixed support arm and the main slide rod are on the same side of the central shaft. The cutting mechanism is arranged correspondingly to the fixed support arm.

[0008] Furthermore, the fixed support arm and the main slide rod are arranged perpendicularly to the central axis rod, and the fixed support arm and the main slide rod are on the same side of the central axis rod.

[0009] Furthermore, a detachable support arm is detachably connected to the free end of the fixed support arm to extend the length of the fixed support arm; or the fixed support arm is a telescopic arm.

[0010] Furthermore, the main slide bar is provided with a scale for marking the sliding adjustment size of the motion structure; and / or the free end of the main slide bar is provided with a limiting pin for limiting the sliding adjustment range of the motion structure and preventing the motion structure from disengaging.

[0011] Furthermore, the actuating structure includes a sleeve; the sleeve is arranged parallel to the central shaft, the first end of the sleeve is slidably fitted onto the main slide rod, the second end of the sleeve is arranged towards the fixed support arm, and the cutting mechanism is assembled at the second end of the sleeve; a positioning cylinder is vertically arranged on the side wall of the sleeve, and the positioning cylinder is arranged towards the central shaft and slides in cooperation with the main positioning hole on the central shaft; a sliding locking mechanism is provided between the positioning cylinder and the main positioning hole and / or between the sleeve and the main slide rod.

[0012] Furthermore, the sliding fit between the positioning cylinder and the main positioning hole, and the sliding fit between the sleeve and the main sliding rod, constitute a double slide rail mechanism.

[0013] Furthermore, the sliding locking mechanism includes a limit hand-tightening screw arranged on the sleeve and connected by threads. By tightening the limit hand-tightening screw and pressing it against the main slide rod, sliding locking is achieved.

[0014] Furthermore, the second end of the sleeve has an assembly cavity for assembling the cutting mechanism. On the side wall of the sleeve away from the central shaft, there are limiting auxiliary grooves arranged along the circumference of the sleeve and adjusting main grooves arranged along the axial direction of the sleeve. The two limiting auxiliary grooves are respectively located at the two ends of the adjusting main groove to form a U-shaped groove, and the U-shaped groove is connected to the assembly cavity.

[0015] Furthermore, the cutting mechanism includes a compression spring, a blade connector, and a lever hand-tightening screw. The compression spring and the blade connector are sequentially installed into the assembly cavity. The blade is installed into the blade connector, and the lever hand-tightening screw passes through the U-shaped groove and the side wall of the blade connector and abuts against the side of the blade to achieve fixed positioning of the blade. Alternatively, the blade and the blade connector are integrally formed, and the lever hand-tightening screw passes through the U-shaped groove and the side wall of the blade connector. The extension or retraction of the blade is controlled by moving the lever hand-tightening screw.

[0016] Furthermore, the cutting mechanism also includes a flat-end base screw, which is screwed radially along the blade connector to abut against the side of the blade, and the outer end face of the flat-end base screw is flush with or lower than the outer surface of the blade connector to achieve fixed positioning of the blade. The flat-end base screw and the lever hand-tightening screw constitute a double-top-abutment positioning of the blade.

[0017] Furthermore, an insert nut is embedded in the base of the blade connector, a flat-end screw is screwed into the corresponding insert nut, and / or a lever hand screw is screwed into the corresponding insert nut; and / or an insert nut is embedded in the base of the sleeve, a limit hand screw is screwed into the corresponding insert nut.

[0018] This utility model has the following beneficial effects:

[0019] This utility model of a stoma base plate trimming device establishes a stable trimming benchmark through axial sleeve engagement and axial fit positioning between the central shaft and the central circular hole of the stoma base plate. This ensures that the device maintains a precise relative positional relationship with the base plate throughout the trimming process, solving the problem of insufficient trimming accuracy caused by the lack of a fixed positioning benchmark in existing technologies. The radially adjustable design of the motion structure along the central shaft enables precise control of the trimming hole diameter. Operators can adjust the motion structure to a preset position according to actual needs, ensuring that the final trimmed opening size precisely matches the patient's stoma size. The working method of rotating the central shaft to drive the motion structure makes the trimming process more precise. The device maintains a stable motion trajectory, avoiding uneven edges caused by manual cutting or unstable operation of existing auxiliary tools, thus ensuring the smoothness of the opening edge. Both the central shaft and the motion mechanism act directly on the stoma base. The central shaft only engages with the stoma base for axial positioning and fitting. The cutting action of the motion mechanism, in conjunction with the central shaft, also acts only on the stoma base and has no connection to or impact on the ostomy bag. Therefore, the overall structural design is suitable for both two-piece and one-piece ostomy bag bases. The universal fitting design of the central shaft solves the problem of existing tools being unable to accommodate both structures. The device uses mechanical adjustment and rotation operation, with a simple and reliable structure, requiring no complex processing technology, reducing manufacturing costs, and improving ease of use.

[0020] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0022] Figure 1 is a structural schematic diagram of the stoma base trimming device of a preferred embodiment of the present invention;

[0023] Figure 2 is a second structural schematic diagram of the stoma base trimming device of the preferred embodiment of this utility model;

[0024] Figure 3 is an exploded view of the stoma base trimming device of a preferred embodiment of the present invention.

[0025] Legend:

[0026] 100. Central shaft; 101. Chassis positioning ring; 102. Fixed support arm; 1021. Detachable support arm; 103. Sleeve groove; 104. Main body positioning hole; 200. Main body slide rod; 201. Dimension scale; 202. Limiting pin; 300. Positioning cylinder; 400. Action structure; 401. Sleeve; 4011. Limiting auxiliary groove; 4012. Adjusting main groove; 500. Cutting mechanism; 501. Compression spring; 502. Blade connector; 503. Lever hand screw; 504. Blade; 505. Flat-end base screw; 600. Sliding locking mechanism; 601. Limiting hand screw; 700. Insert nut. Detailed Implementation

[0027] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0028] Figure 1 is one of the structural schematic diagrams of the stoma base trimming device of the present invention according to a preferred embodiment; Figure 2 is another structural schematic diagram of the stoma base trimming device of the present invention according to a preferred embodiment; Figure 3 is an exploded view of the stoma base trimming device of the present invention according to a preferred embodiment.

[0029] As shown in Figures 1 and 2, the stoma base trimming device of this embodiment includes a central shaft 100, a main slide rod 200, a positioning cylinder 300, an action structure 400, and a cutting mechanism 500. The central shaft 100 is used to axially engage with and position itself in axial contact with the central circular hole of the stoma base. The main slide rod 200 is located at the first end of the central shaft 100 and is arranged radially along the central shaft 100. The action structure 400 is slidably and adjustablely arranged on the main slide rod 200, forming a first sliding mechanism. The cutting mechanism 500 is arranged on the action structure 400 and is positioned towards the stoma base to facilitate cutting the stoma base. The positioning cylinder 300 is arranged on the action structure 400, parallel to the main slide rod 200, and is positioned towards the central shaft 100 and slides in contact with the main positioning hole 104 on the central shaft 100, forming a second sliding mechanism. This utility model's stoma base plate trimming device establishes a stable trimming benchmark through the axial sleeve engagement and axial fit positioning of the central shaft 100 with the central circular hole of the stoma base plate. This ensures that the device maintains a precise relative positional relationship with the base plate throughout the trimming process, solving the problem of insufficient trimming accuracy caused by the lack of a fixed positioning benchmark in existing technologies. The design of the actuating structure 400, which can be radially slidably adjusted along the central shaft 100, enables precise control of the trimming hole diameter. Operators can adjust the actuating structure 400 to a preset position according to actual needs, ensuring that the final trimmed opening size precisely matches the patient's stoma size. The working method of rotating the central shaft 100 to drive the movement of the actuating structure 400 makes the trimming process more precise. The device maintains a stable motion trajectory, avoiding uneven edges caused by manual cutting or unstable operation of existing auxiliary tools, thus ensuring the smoothness of the opening edge. Both the central shaft 100 and the action structure 400 act directly on the stoma base. The central shaft 100 only engages with the stoma base for axial positioning and fitting. The cutting action of the action structure 400, in conjunction with the central shaft 100, also acts only on the stoma base and has no connection or impact on the ostomy bag. Therefore, the overall structural design is suitable for both two-piece and one-piece ostomy bag bases. The universal fitting design of the central shaft 100 solves the problem that existing tools cannot accommodate both structures. The device uses mechanical adjustment and rotation operation, is simple and reliable in structure, requires no complex processing technology, reduces manufacturing costs, and improves ease of use.

[0030] As shown in Figures 1, 2, and 3, in this embodiment, the second end of the central shaft 100 is provided with a chassis positioning ring 101, and the fixed support arm 102 is located at the end of the second end of the central shaft 100 to form an L-shaped structure. A sleeve groove 103 is formed between the chassis positioning ring 101 and the fixed support arm 102 for fitting the stoma chassis and positioning the stoma chassis in close contact with the chassis positioning ring 101. The fixed support arm 102 is arranged perpendicularly to the central shaft 100, and the fixed support arm 102 and the main slide rod 200 are on the same side of the central shaft 100. The cutting mechanism 500 is arranged correspondingly to the fixed support arm 102. A sleeve groove 103 is formed between the chassis positioning ring 101 and the fixed support arm 102. Through the axial limiting effect of the sleeve groove 103, the stoma chassis maintains a stable positioning state during trimming, achieving precise fit and positioning between the stoma chassis and the chassis positioning ring 101. This establishes a reliable mechanical reference for trimming operations. The sleeve structure is simple and reliable, facilitating quick loading and unloading of stoma chassis of different specifications. The vertical layout on the central shaft 100, with the fixed support arm 102 and the main slide rod 200 arranged vertically on the same side of the central shaft 100, forms a stable... The spatial support structure ensures a precise correspondence between the actuating structure 400 and the fixed support arm 102, providing a stable axis of rotation for the rotary trimming action. The radial adjustment function of the main slide rod 200 provides a precise radial sliding track for the actuating structure 400, allowing the position of the blade 504 to be linearly adjusted to meet trimming needs of different diameters. The sliding adjustment mechanism is simple, reliable, and easy to operate. The corresponding arrangement of the fixed support arm 102 and the actuating structure 400 ensures the balance of trimming force, and the central shaft 100, as the core support component, ensures the rigidity of the overall structure. All components work together to form a stable force transmission path. Through a simple mechanical structure, the precise positioning, stable support, and precise adjustment functions of the stoma chassis are achieved, providing a reliable structural foundation for subsequent trimming operations. Optionally, the chassis positioning ring 101 has an avoidance notch on the side facing the actuating structure 400 to facilitate the movement of the actuating structure 400. Optionally, the bottom of the sleeve groove 103 is conical, with the smaller end of the conical surface facing the base positioning ring 101. When the stoma base plate is fitted into the sleeve groove 103 through the central hole, the conical surface forces the stoma base plate to fit snugly against the base positioning ring 101. This design is suitable for different stoma base plates and for matching the diameter of the central hole in different stoma base plates. Optionally, the bottom of the sleeve groove 103 is conical or cylindrical. Optionally, two sets of chassis positioning rings 101 are arranged at the first end of the central shaft 100. The two sets of chassis positioning rings 101 are arranged at intervals, and the interval between the two sets of chassis positioning rings 101 matches the thickness of the stoma chassis. The radial dimension of the chassis positioning ring 101 arranged near the fixed support arm 102 is smaller than the radial dimension of the chassis positioning ring 101 arranged away from the fixed support arm 102, so that after the central circular hole of the stoma chassis is elastically deformed, it passes through the smaller chassis positioning ring 101 and falls into the area between the two sets of chassis positioning rings 101.Optionally, the top surface of the bottom chassis positioning ring 101 (small-sized chassis positioning ring 101) is flush with the top surface of the fixed support arm 102; the bottom chassis positioning ring 101 (small-sized chassis positioning ring 101) and the fixed support arm 102 together serve to support and position the stoma chassis.

[0031] As shown in Figures 1, 2 and 3, in this embodiment, a detachable support arm 1021 is detachably inserted into the free end of the fixed support arm 102 to extend the length of the fixed support arm 102; or the fixed support arm 102 is a telescopic arm. By adjusting the extension or telescopic arm of the detachable support arm 1021, the length of the fixed support arm 102 can be adjusted to accommodate stoma bases of different sizes (especially large-sized bases), solving the limitation of a single-length support arm on the base size. When the stoma base size is small, especially for "two-piece stoma bags," there is a raised annular rib on the stoma base. When the outer diameter of the annular rib is smaller than the maximum outer diameter of the detachable support arm 1021, the upper surface of the detachable support arm 1021 will contact the annular rib on the stoma base at a certain angle. This results in a lack of effective fit between the stoma base and the detachable support arm 1021, creating a void space. Consequently, the blade 504 cannot pierce the stoma base for effective cutting. Making the detachable support arm 1021 detachable avoids this problem. The extended support arm provides a larger support area, ensuring stable support even for large-sized bases and preventing the base edge from lifting or shifting during trimming. The detachable support arm 1021 adopts a plug-in structure for easy and quick assembly and disassembly; the telescopic arm design allows for stepless adjustment and simple operation; both methods maintain the compactness and portability of the device. While maintaining the simplicity and reliability of the central shaft 100, the modular or adjustable design significantly improves the device's adaptability to different sizes of stoma chassis, while maintaining the original positioning accuracy and operational stability.

[0032] As shown in Figures 1, 2, and 3, in this embodiment, the main slide bar 200 is provided with a size scale 201 for marking the sliding adjustment size of the motion structure 400; and / or the free end of the main slide bar 200 is provided with a limiting pin 202 for limiting the sliding adjustment range of the motion structure 400 and preventing the motion structure 400 from dislodging. The size scale 201 provides an intuitive size reference, enabling the operator to accurately adjust the radial position of the motion structure 400, realize quantitative control of the trimming aperture, ensure that the opening size and the stoma size are accurately matched, simplify the adjustment process, avoid material waste caused by repeated trial cuts, improve operational repeatability, and ensure consistent accuracy of multiple trimmings. The limiting pin 202 mechanically limits the maximum adjustment stroke of the motion structure 400, prevents over-adjustment, avoids the motion structure 400 from accidentally dislodging from the main slide bar 200, ensures operational safety, maintains the correspondence between the motion structure 400 and the fixed support arm 102, and ensures stable trimming trajectory; the limiting pin 202 acts as a rigid stop, protecting the adjustment mechanism from damage by excessive external force. The combined structure of the size scale 201 and the limit pin 202 enables the size scale 201 and the limit pin 202 to work together, forming a "hardware-software combined" adjustment guarantee mechanism. This ensures both adjustment accuracy and mechanism reliability, making the entire adjustment process precise and safe, especially suitable for medical personnel to operate quickly and accurately in clinical environments. Through simple mechanical structure improvements, the adjustment accuracy, operational safety, and reliability of the device are significantly improved without increasing operational complexity.

[0033] As shown in Figures 1, 2, and 3, in this embodiment, the actuating structure 400 includes a sleeve 401. The sleeve 401 is arranged parallel to the central shaft 100. The first end of the sleeve 401 is slidably fitted onto the main slide rod 200, and the second end of the sleeve 401 is arranged towards the fixed support arm 102. The cutting mechanism 500 is assembled to the second end of the sleeve 401. A positioning cylinder 300 is vertically arranged on the side wall of the sleeve 401, and the positioning cylinder 300 is arranged towards the central shaft 100 and slides in cooperation with the main positioning hole 104 on the central shaft 100. A sliding locking mechanism 600 is provided between the positioning cylinder 300 and the main positioning hole 104 and / or between the sleeve 401 and the main slide rod 200. The sliding cooperation between the positioning cylinder 300 and the main positioning hole 104, and the sliding cooperation between the sleeve 401 and the main slide rod 200, constitutes a double slide rail mechanism. The first guide rail is formed by the sliding engagement of the sleeve 401 and the main slide rod 200, and the second guide rail is formed by the sliding engagement of the positioning cylinder 300 and the main positioning hole 104, thus forming a double slide rail mechanism. The two rails are parallel and constrained to each other, eliminating the radial sway that may be caused by a single slide rail, and ensuring that the cutting mechanism 500 maintains strict radial linear motion during adjustment and operation. The double slide rails share the load, reducing the risk of deformation of a single sliding pair, significantly improving the torsional stiffness of the overall structure, and preventing skewing during cutting. The sliding locking mechanism 600 achieves reliable locking at any position, and the synchronous locking of the double rails ensures the positioning of the cutting mechanism 500. Position stability is ensured, avoiding dimensional deviations caused by mechanism displacement during trimming operations; dual-rail guidance makes push-pull operations smoother and less labor-intensive, and the mechanical self-centering characteristic reduces assembly precision requirements, maintaining guiding accuracy even after long-term use and wear; sleeve 401 simultaneously undertakes the dual functions of installation and motion guidance for cutting mechanism 500, while positioning cylinder 300 serves both guiding and structural reinforcement functions, achieving multi-functional integration within a limited space through a compact design; through the dual-slide rail mechanism, while ensuring easy adjustment, the motion accuracy and operational stability of motion structure 400 are significantly improved, fundamentally solving the technical defects of single-slide rail structures such as easy shaking and inaccurate positioning.

[0034] As shown in Figures 1, 2 and 3, in this embodiment, the sliding locking mechanism 600 includes a limiting hand-tightening screw 601 disposed on the sleeve 401 and connected by threads. By tightening the limiting hand-tightening screw 601 and pressing it against the main slide rod 200, sliding locking is achieved. The limit hand-tightening screw 601 achieves progressive locking through threaded transmission, allowing for precise control of the locking force. The limit hand-tightening screw 601 abuts against the main slide rod 200 to form a surface contact friction lock, ensuring the motion structure 400 is firmly fixed and preventing accidental displacement due to vibration during cutting operations. The hand-tightening design allows for quick operation without tools, and the self-locking characteristic of the thread ensures automatic maintenance of the locked state. Single-point operation simultaneously achieves synchronous locking of both slide rails. The mechanical locking method is unaffected by repeated use; wear of the threaded pair can be compensated by retightening, offering higher durability than structures like elastic locks. The threaded connection will not accidentally disengage, and the positive locking force increases with the operating torque, preventing locking failure due to misoperation. The compact screw structure does not increase the overall volume and can be integrated at any position on the side wall of the sleeve 401 without affecting the normal movement of other components. Through a simple threaded locking mechanism, reliable locking of the motion structure 400 after adjustment is achieved with almost no increase in structural complexity, solving the technical problems of easy wear and insufficient locking force in traditional elastic locks.

[0035] As shown in Figures 1, 2 and 3, in this embodiment, the second end of the sleeve 401 has an assembly cavity for assembling the cutting mechanism 500. On the side wall of the sleeve 401 away from the central shaft 100, there is a limiting auxiliary groove 4011 arranged circumferentially along the sleeve 401 and an adjusting main groove 4012 arranged axially along the sleeve 401. The two limiting auxiliary grooves 4011 are respectively located at the two ends of the adjusting main groove 4012 and combine to form a U-shaped groove, and the U-shaped groove is connected to the assembly cavity. The limiting auxiliary groove 4011 and the adjusting main groove 4012 combine to form a U-shaped groove, creating an open assembly channel and control path. This facilitates the insertion and positioning of the cutting mechanism 500 into the assembly cavity, simplifying the installation / replacement process. It also allows the cutting mechanism 500 to easily switch between extension and retraction via the adjusting main groove 4012, and enables axial positioning within the limiting auxiliary groove 4011. Specifically, it positions itself within the limiting auxiliary groove 4011 at the retracted position for stable storage of the blade 504, and within the limiting auxiliary groove 4011 at the extended position for stable trimming of the stoma base by the blade 504. The two limiting auxiliary grooves 4011 provide circumferential positioning references, while the adjusting main groove 4012 provides axial adjustment space, allowing the cutting mechanism 500 to switch arbitrarily between radial positioning (blade retraction positioning, blade extension positioning) and axial adjustment. The same U-shaped groove also serves as an assembly guide, position adjustment, and operational observation function. The U-shaped groove structure significantly improves the assembly convenience and positioning accuracy of the cutting mechanism 500 while ensuring the structural strength of the sleeve 401, solving the technical problems of inconvenient operation and difficult positioning in traditional closed assembly cavities. Optionally, the U-shaped groove can be replaced with an E-shaped groove or more limiting auxiliary grooves 4011 can be added to control the extension length of the blade 504, thereby enabling trimming and cutting of stoma bases of different thicknesses. The lever hand-tightening screw 503 passes through the U-shaped groove and forms an adjustable connection with the blade connector 502. The radial extension and retraction of the blade 504 can be adjusted by moving the lever hand-tightening screw 503. The split design (blade connector 502 and blade 504 are separate, using an independent blade 504) facilitates the replacement and maintenance of the blade 504, while the integrated design (blade connector 502 and blade 504 are a single unit) improves structural strength and stability. Both designs achieve unified operation through the same adjustment mechanism. The compression spring 501 provides continuous axial preload. By combining the lever, hand screw 503, and U-shaped groove, the extension and retraction adjustment of the blade 504 and the limiting positioning after extension and retraction adjustment are realized, thereby improving the blade retraction stability and the blade cutting stability.The lever hand-tightening screw 503 enables manual operation, and the U-shaped groove provides sufficient adjustment stroke, allowing for tool-free switching of the blade 504 state. The lever hand-tightening screw 503's top-fixing method prevents the blade 504 from accidentally falling off. In the retracted state, the blade 504 can be completely retracted into the assembly cavity, reducing safety hazards during non-operational times. All adjustment mechanisms are integrated at the end of the sleeve 401 without adding extra volume. Through the elastic pre-tightening and screw adjustment structure, the blade 504 can be quickly positioned, precisely adjusted, and safely protected within a limited space, solving the technical problems of inconvenient adjustment and poor stability of the traditional cutting mechanism 500.

[0036] As shown in Figures 1, 2, and 3, in this embodiment, the cutting mechanism 500 includes a compression spring 501, a blade connector 502, and a lever hand-tightening screw 503. The compression spring 501 and the blade connector 502 are sequentially installed into the assembly cavity. The blade 504 is installed into the blade connector 502. The lever hand-tightening screw 503 passes through the U-shaped groove and the side wall of the blade connector 502 and abuts against the side of the blade 504 to achieve fixed positioning of the blade 504. Alternatively, the blade 504 and the blade connector 502 are integrally formed, and the lever hand-tightening screw 503 passes through the U-shaped groove and the side wall of the blade connector 502. The extension or retraction of the blade 504 is controlled by moving the lever hand-tightening screw 503. The compression spring 501 and the blade connector 502 adopt a layered assembly design, forming a modular structure of "spring preload and blade load-bearing". Lateral assembly of the blade assembly is achieved through the open structure of the U-shaped groove, avoiding the difficulties of traditional axial assembly. Split and integrated blade solutions are interchangeable to meet different application scenarios. The lever hand-tightening screw 503 passes through the U-shaped groove, forming a three-point positioning structure for the groove wall, blade connector 502, and blade 504. Micron-level precise adjustment of the radial position of the blade 504 is achieved through threaded advancement. The adjusting main groove 4012 provides axial guidance, ensuring the linear movement of the blade 504 without deflection. The compression spring 501 continuously applies axial preload, eliminating clearance between moving parts. The lever hand-tightening screw 503 abuts against the blade 504 to form a friction lock. This design provides dual protection for the stability of the 504 cutting blade during operation. The integrated design completely eliminates tolerances at the blade 504 connection point. The lever-operated hand-tightening screw 503 design allows for one-handed operation, making it convenient for clinical use. The U-shaped groove provides a visual adjustment window for easy observation of the blade 504's status. Spring preload automatically compensates for wear, extending maintenance intervals. The blade 504 retraction function ensures safe storage when not in use, with a mechanical lock preventing accidental retraction during operation. The integrated design eliminates the risk of the blade 504 falling off. Through a composite mechanism of "elastic preload + threaded adjustment," it simultaneously achieves rapid assembly, precise adjustment, stable cutting, and safety protection within a limited space, overcoming the technical bottlenecks of traditional cutting mechanisms such as inconvenient adjustment, poor accuracy, poor stability, and difficult maintenance. It is particularly suitable for clinical trimming scenarios requiring frequent adjustment of the 504 cutting blade's status.

[0037] As shown in Figure 3, in this embodiment, the cutting mechanism 500 also includes a flat-end base screw 505. The flat-end base screw 505 is screwed radially along the blade connector 502 to abut against the side of the blade 504, and the outer end face of the flat-end base screw 505 is flush with or lower than the outer surface of the blade connector 502, so as to achieve fixed positioning of the blade 504. The flat-end base screw 505 and the lever hand-tightening screw 503 constitute a double abutment positioning of the blade 504. The lever hand-tightening screw 503 and the flat-end base screw 505 form a double-top-stop positioning structure; through two-point constraint, the radial, axial, and circumferential movement of the blade 504 within the connector is completely eliminated, significantly improving the vibration resistance during cutting operations; the flat-end base screw 505 undertakes the main positioning function, while the lever hand-tightening screw 503 still maintains radial adjustment capability, realizing a composite positioning mode of "fixed reference + adjustable mechanism"; the flat-end base screw 505 adopts a flat-end design to avoid protrusions causing movement resistance of the blade connector 502 within the assembly cavity of the sleeve 401. The double locking mechanism prevents the insert 504 from loosening due to single-point failure, and the installation below the surface ensures the overall smoothness of the mechanism. The newly added flat-end base screw 505 does not change the function of the original adjustment mechanism and is compatible with both integrated and separate insert solutions, achieving enhanced positioning without additional machining space. The flat-end base screw 505 is easy to maintain with general-purpose tools, and the independent locking point can be adjusted and maintained individually. If damaged, only a single standard part needs to be replaced. By adding a low-cost standard part, the positioning reliability of the insert 504 is improved without affecting the original adjustment function.

[0038] As shown in Figure 3, in this embodiment, an insert nut 700 is embedded in the base of the blade connector 502, a flat-end base screw 505 is screwed into the corresponding insert nut 700, and / or a lever hand screw 503 is screwed into the corresponding insert nut 700; and / or an insert nut 700 is embedded in the base of the sleeve 401, a limiting hand screw 601 is screwed into the corresponding insert nut 700. The insert nut 700 forms a high-strength internal thread on the blade connector 502 and the sleeve 401 base, avoiding the risk of stripping caused by directly machining threads on the plastic / light alloy base; it significantly improves the locking reliability of fasteners such as the slotted flat-end base screw 505; the metal insert nut 700 has a wear resistance far exceeding that of the base material, can withstand repeated disassembly and assembly without damaging the thread structure, and extends the service life of key adjustment components; the pre-embedded molding process of the insert nut 700 does not disrupt the continuity of the base, maintaining the original mechanical strength of the blade connector 502 and the sleeve 401, and avoiding stress concentration problems caused by traditional screw holes; the standardized insert nut 700 facilitates replacement and maintenance, and only a single insert needs to be replaced when damaged without affecting the overall structure, and the universal specification nut reduces spare parts management costs; by arranging the metal insert nut 700, the durability of key threaded connections is improved while maintaining the lightweight of the device.

[0039] Example 1:

[0040] A device for cutting the base plate of an ostomy bag is provided. The cutting size of the opening can be precisely controlled by a sliding sleeve assembly. The device is accurate in positioning, simple in structure, easy to operate, and suitable for cutting the base plate opening in ostomy bags with one-piece and two-piece structures.

[0041] The ostomy bag base cutting device includes a central shaft 100, a main slide rod 200, a detachable support arm 1021, a sliding assembly, a blade 504, a limiting hand-tightening screw 601, and a positioning cylinder 300. The main slide rod 200 is located at the top of the central shaft 100, and the detachable support arm 1021 is located at the bottom of the central shaft 100. The main slide rod 200 and the detachable support arm 1021 are respectively located at both ends of the central shaft 100, and are situated on the same side of the central shaft 100. The axis of the main slide rod 200 and the axis of the detachable support arm 1021 are aligned. The lines are perpendicular to the axis of the central shaft 100. The sliding component is slidably sleeved on the main slide rod 200. The sliding component is locked on the main slide rod 200 by the limiting hand screw 601. The blade 504 is set on the end face of the sliding component facing the detachable support arm 1021. The main slide rod 200 has a flat design. The positioning cylinder 300 is set on the side of the sliding component facing the central shaft 100. The axis of the positioning cylinder 300 is parallel to the axis of the main slide rod 200. The central shaft 100 is provided with a main positioning hole 104. The positioning cylinder 300 is always slidably inserted into the main positioning hole 104.

[0042] Working principle: When the ostomy bag base plate cutting device is working, insert the bottom of the central shaft 100 of the ostomy bag base plate into the middle circular hole of the ostomy base plate, and fix the ostomy base plate concentrically on the base plate positioning ring 101 on the central shaft 100. Observe the scale line (dimension scale 201), slide the sleeve assembly to the required outer diameter, tighten the limit hand screw 601 to fix the relative position of the sleeve 401, and then use your hand to control the lever hand screw 503 to slide in the groove of the sleeve 401 to change the blade 504 from the retracted state to the extended working state, ensuring that the blade 504 pierces the ostomy base plate at this time. Then, hold the ostomy base plate with one hand and the ostomy bag base plate cutting device with the other hand to rotate clockwise to cut until the required hole diameter is cut. After use, remove the waste material and retract the blade 504 by using the lever hand screw 503.

[0043] When the user applies force to the sliding assembly, the flat main slide bar 200 and the positioning cylinder 300 act on both ends of the sliding assembly, respectively, which can limit both ends of the sliding assembly, better restrict the relative rotation between the sliding assembly and the main slide bar 200, limit the offset of the blade 504, and improve the cutting effect.

[0044] As shown in Figure 3, in order to ensure the assembly accuracy of the blade 504 on the sleeve assembly, a positioning cylinder 300 and a main body positioning hole 104 on the central shaft 100 are added below the sleeve 401, so that the sleeve 401 can only move along the axis of the positioning cylinder 300 and will not wobble left and right. At the same time, the position where the sleeve 401 is assembled with the central shaft 100 is positioned by a flat structure, which further ensures that the blade 504 will not deviate when working.

[0045] As shown in Figure 3, the blade 504 has a retractable structure. The blade 504 is set on the blade connector 502. The blade 504 is fastened by a flat-end base screw 505, which allows the blade 504 to be disassembled and easily replaced. The blade 504 can be stored by sliding up and down in the main adjustment slot 4012 and the limiting auxiliary slot 4011 by turning the lever and tightening the screw 503.

[0046] When the stoma base is cut clockwise, the blade 504 is subjected to a counterclockwise reaction force. This force makes the lever hand screw 503 better fixed on the limiting auxiliary groove 4011 on the sleeve 401. In addition, the positioning cylinder 300 is fixed in the main body positioning hole 104, so that the blade 504 will not swing significantly when working, and thus the blade 504 will not fall out of the slot.

[0047] The diameter of the cutting device's cutting stoma base plate is adjusted by a linear sliding sleeve, ranging from 25mm to 70mm.

[0048] The outer diameter of the base positioning ring 101 is larger than the diameter of the central hole of the stoma base plate. The function of the base positioning ring 101 is to axially limit the stoma base plate on the central shaft 100. Specifically, since the stoma base plate is made of elastic material, the stoma base plate below the base positioning ring 101 may tilt upwards during cutting. The base positioning ring 101 can prevent the stoma base plate below it from tilting upwards. Before cutting, the stoma base plate needs to be inserted through the central hole to the bottom end face of the base positioning ring 101 on the central shaft 100, so that the stoma base plate is flush with the bottom end face of the base positioning ring 101. During cutting, the blade 504 rotates clockwise around the central axis of the base positioning ring 101 to cut the base plate.

[0049] The detachable support arm 1021 is designed in two sections. When it is a one-piece ostomy bag, because the stoma base plate does not have a raised plastic retaining ring, the detachable support arm 1021 can be used normally without being disassembled. When it is a two-piece ostomy bag, there is a raised annular rib on the stoma base plate. When the outer diameter of the rib is smaller than the maximum outer diameter of the detachable support arm 1021, the upper surface of the detachable support arm 1021 will contact the annular rib on the stoma base plate at a certain angle. This causes the plastic tray and the detachable support arm 1021 to not fit effectively, forming a void space. As a result, the blade 504 cannot pierce the stoma base plate for effective cutting. If the detachable support arm 1021 is made detachable, the above problem can be avoided.

[0050] Example 2:

[0051] The blade 504 has a retractable structure and is mounted on the blade connector 502. The blade 504 and the blade connector 502 are embedded together by secondary injection molding. When replacing the blade 504, only the blade connector 502 needs to be replaced. Compared with the method of fastening the blade 504 with a flat-end base screw 505, this embodiment does not require a flat-end base screw 505 and a copper insert nut, reducing the number of parts and simplifying the structure. Finally, the blade 504 is retracted by sliding the lever and the hand-tightening screw 503 up and down in the adjusting main groove 4012 and the limiting auxiliary groove 4011.

[0052] Any matters not covered in this utility model are common knowledge.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

[0055] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stoma base trimming device, characterized in that, The system includes a central shaft (100), a main slide rod (200), a positioning cylinder (300), an action structure (400), and a cutting mechanism (500). The central shaft (100) is used to axially engage and fit with the central hole of the stoma base plate for axial positioning. The main slide rod (200) is located at the first end of the central shaft (100) and is arranged radially along the central shaft (100). The action structure (400) is slidably and adjustablely arranged on the main slide rod (200). The first sliding mechanism is formed. The cutting mechanism (500) is arranged on the action structure (400). The cutting mechanism (500) is arranged towards the stoma base plate to facilitate cutting the stoma base plate. The positioning cylinder (300) is arranged on the action structure (400). The positioning cylinder (300) is arranged parallel to the main slide rod (200). The positioning cylinder (300) is arranged towards the central shaft rod (100) and slides in cooperation with the main positioning hole (104) on the central shaft rod (100), thus forming the second sliding mechanism.

2. The stoma base trimming device according to claim 1, characterized in that, The second end of the central shaft (100) is provided with a chassis positioning ring (101), and the fixed support arm (102) is located at the end of the second end of the central shaft (100) to form an L-shaped structure. A sleeve groove (103) is formed between the chassis positioning ring (101) and the fixed support arm (102) for fitting the stoma chassis and positioning the stoma chassis with the chassis positioning ring (101). The fixed support arm (102) is arranged perpendicularly to the central shaft (100), and the fixed support arm (102) and the main slide rod (200) are on the same side of the central shaft (100). The cutting mechanism (500) is arranged correspondingly to the fixed support arm (102).

3. The stoma base trimming device according to claim 2, characterized in that, A detachable support arm (1021) is detachably inserted into the free end of the fixed support arm (102) to extend the length of the fixed support arm (102); or the fixed support arm (102) is a telescopic arm.

4. The stoma base trimming device according to claim 2, characterized in that, The main slide bar (200) is provided with a size scale (201) for marking the sliding adjustment size of the action structure (400); and / or the free end of the main slide bar (200) is provided with a limit pin (202) for limiting the sliding adjustment range of the action structure (400) and preventing the action structure (400) from falling out.

5. The stoma base trimming device according to any one of claims 2 to 4, characterized in that, The action structure (400) includes a sleeve (401); the sleeve (401) is arranged parallel to the central shaft (100), the first end of the sleeve (401) is slidably sleeved on the main slide rod (200), the second end of the sleeve (401) is arranged towards the fixed support arm (102), and the cutting mechanism (500) is assembled on the second end of the sleeve (401); the positioning cylinder (300) is arranged vertically on the side wall of the sleeve (401), and the positioning cylinder (300) is arranged towards the central shaft (100) and slides in cooperation with the main positioning hole (104) on the central shaft (100); a sliding locking mechanism (600) is provided between the positioning cylinder (300) and the main positioning hole (104) and / or between the sleeve (401) and the main slide rod (200).

6. The stoma base trimming device according to claim 5, characterized in that, The sliding locking mechanism (600) includes a limit hand screw (601) arranged on the sleeve (401) and connected by threads. By tightening the limit hand screw (601) and pressing it against the main slide rod (200), sliding locking is achieved.

7. The stoma base trimming device according to claim 5, characterized in that, The second end of the sleeve (401) has an assembly cavity for assembling the cutting mechanism (500). On the side wall of the sleeve (401) away from the central shaft (100), there is a limiting auxiliary groove (4011) arranged circumferentially along the sleeve (401) and an adjusting main groove (4012) arranged axially along the sleeve (401). The two limiting auxiliary grooves (4011) are respectively located at the two ends of the adjusting main groove (4012) to form a U-shaped groove, and the U-shaped groove is connected to the assembly cavity.

8. The stoma base trimming device according to claim 7, characterized in that, The cutting mechanism (500) includes a compression spring (501), a blade connector (502), and a lever hand screw (503). The compression spring (501) and the blade connector (502) are sequentially installed into the assembly cavity. The blade (504) is installed into the blade connector (502). The lever hand screw (503) passes through the U-shaped groove and the side wall of the blade connector (502) and abuts against the side of the blade (504) to fix and position the blade (504). Alternatively, the blade (504) and the blade connector (502) are integrally formed. The lever hand screw (503) passes through the U-shaped groove and the side wall of the blade connector (502). The extension or retraction of the blade (504) is controlled by moving the lever hand screw (503).

9. The stoma base trimming device according to claim 7, characterized in that, The cutting mechanism (500) also includes a flat-end base screw (505), which is screwed radially along the blade connector (502) to abut the side of the blade (504), and the outer end face of the flat-end base screw (505) is flush with or lower than the outer surface of the blade connector (502) to achieve fixed positioning of the blade (504). The flat-end base screw (505) and the lever hand screw (503) constitute a double abutment positioning of the blade (504).

10. The stoma base trimming device according to claim 9, characterized in that, An insert nut (700) is embedded in the base of the blade connector (502), a flat-end base screw (505) is screwed into the corresponding insert nut (700), and / or a lever hand screw (503) is screwed into the corresponding insert nut (700); and / or an insert nut (700) is embedded in the base of the sleeve (401), a limit hand screw (601) is screwed into the corresponding insert nut (700).

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