Two-piece ostomy bag with screw clasp closure
The two-piece ostomy bag, with its spiral clasp structure and locking design, solves the pain and operational difficulties caused by the clasp design in existing technologies, and achieves a simple, safe, and low-cost ostomy bag user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING HOSPITAL OF TCM
- Filing Date
- 2025-03-14
- Publication Date
- 2026-07-14
AI Technical Summary
The existing two-piece ostomy bag's clasp design is inconvenient to use because it can cause postoperative abdominal pain for patients or require a high level of skill from the operator.
It adopts a spiral retaining ring structure, which achieves the closing and opening of the retaining ring through the threaded opening and spiral rotation. Combined with the locking buckle for secondary fixation, the retaining ring is made of rigid plastic and is equipped with a rubber sealing ring on the inner wall of the bag to increase the sealing performance.
It is easy to operate, does not require abdominal pressure, reduces the risk of pain, lowers the technical requirements for operators, improves sealing performance and service life, and reduces costs.
Smart Images

Figure CN224484278U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a snap ring closure device, specifically to a two-piece ostomy bag with a spiral snap ring closure structure. Background Technology
[0002] Various intestinal diseases, such as colorectal cancer, often require surgery. Some patients, due to the low-lying tumor, require anal resection and the creation of a colostomy in the abdomen to address their bowel movement issues; these patients need a device to collect their feces. Many manufacturers now offer their own unique ostomy bags, among which the two-piece ostomy bag is widely used. It typically consists of two parts: a base plate and a bag. The base plate is attached to the skin, while the bag collects waste. A retaining ring connects these two parts, ensuring a tight seal and stability.
[0003] Currently, there are two common types of locking rings for two-piece ostomy bags: The first type is a locking ring, which has a circular groove on the base and a circular opening on the bag body. The diameter of the opening is larger than that of the groove on the base, allowing it to lock and cover the groove. Simultaneously, there is a ring around the outer edge of the bag opening; after the bag is attached to the base, squeezing the ring locks the connection between the bag and the base. This design requires skilled operators, as the bag installation involves pressing, which can cause postoperative abdominal pain and is challenging for beginners. Repeated abdominal pressing can cause pain and discomfort. The second type is a floating ring, which has a circular groove on the base, but this groove is only completely fixed to the base on the inner side. The locking ring on the groove extends upwards and outwards, allowing for some floating space. The bag body has a circular opening with a concave locking ring around it, the diameter of which matches the groove on the base. This design allows you to pad the grooves on the base with your fingers, then align the grooves on the bag with them, pressing and pinching along the edges of the grooves to align them. While this design does not put pressure on the abdomen and cause pain, it does require a certain level of skill from the operator, demanding dexterity and a certain amount of strength to install it correctly. Since most enterostomy patients are older and have limited hand and foot mobility, this makes the operation somewhat challenging. Summary of the Invention
[0004] Purpose of the invention: The purpose of this invention is to address the shortcomings of the existing technology and provide a two-piece ostomy bag with a spiral clasp closure structure. This invention does not require high operator skill, is easy to operate, and does not require pressing the patient's abdomen, thus avoiding pain.
[0005] Technical Solution: This utility model discloses a two-piece ostomy bag with a spiral retaining ring closure structure, comprising an ostomy bag body, a base plate end, and a bag body end. The base plate end is provided with a first spiral retaining ring, and the outer wall of the first spiral retaining ring is provided with a first threaded opening. The bag body end is provided with a second spiral retaining ring, the outer wall of the second spiral retaining ring is connected to the ostomy bag body, and the inner wall of the second spiral retaining ring is provided with a second threaded opening. The first threaded opening and the second threaded opening are compatible. When needed, the base plate end is fixed to the skin surface by adhesive on the back. The second spiral retaining ring of the bag body end is placed on top of the first spiral retaining ring of the base plate end. After the threads of the two retaining rings are aligned, they are rotated at a certain angle to close.
[0006] To further enhance the sealing security of the entire ostomy bag, matching buckles are provided on the bottom edge and the bag body edge. The two buckles are configured with one male and one female. After the two retaining rings are tightened, the two buckles are locked together to achieve secondary fixation. When it is necessary to open, the buckles can be opened by gently pushing, and then the retaining rings can be unscrewed to loosen the opening of the ostomy bag body, which can be poured out and cleaned.
[0007] To extend service life and reduce operating costs, both the first and second spiral retaining rings are made of hard plastic.
[0008] To enhance the sealing of this structure, a rubber sealing ring is also provided on the inner wall of the second spiral retaining ring at the end of the bag to prevent leakage of excrement and to buffer pressure changes (such as abdominal movement). Beneficial effects: The two spiral retaining rings in this invention require minimal operator skill, are easy to operate, and do not require pinching a full circle with fingers, saving time; the bag can be closed in seconds. This invention eliminates the need for abdominal pressure, preventing pressure on the patient's abdomen, especially for patients who have just undergone surgery with unhealed sutures, thus avoiding pain and discomfort, making it more humane. This invention does not require additional production material costs, the manufacturing process is simple, and it does not increase environmental pollution. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the structure at the end of the bag body in this utility model.
[0010] Figure 2 This is a schematic diagram of the chassis end structure in this utility model. Detailed Implementation
[0011] The technical solution of this utility model will be described in detail below, but the protection scope of this utility model is not limited to the embodiments described.
[0012] The existing locking 3-ring ostomy bag requires pressing during installation, which can cause pain and discomfort to the postoperative patient's abdomen. The existing floating ostomy bag, on the other hand, requires a certain level of skill from the operator, who needs to be dexterous and have a certain amount of force.
[0013] like Figure 1 and Figure 2 As shown, this utility model utilizes a two-piece ostomy bag with a spiral retaining ring closure structure, comprising an ostomy bag body 2, a base plate end 1, and a bag body end 9. The base plate end 1 is provided with a first spiral retaining ring 4, and the outer wall of the first spiral retaining ring 4 is provided with a first threaded opening 5. The bag body end 9 is provided with a second spiral retaining ring 7, the outer wall of the second spiral retaining ring 7 is connected to the ostomy bag body 2, and the inner wall of the second spiral retaining ring 7 is provided with a second threaded opening 6. The first threaded opening 5 and the second threaded opening 6 are compatible. When needed, the base plate end 1 is fixed to the skin surface by adhesive on the back, and the second spiral retaining ring 7 of the bag body end 9 is placed on the first spiral retaining ring 4 of the base plate end 1. After the threads of the two retaining rings are aligned, they are rotated at a certain angle to close.
[0014] To further enhance the safety of the entire ostomy bag seal, matching buckles 3 are provided on the edge of the base plate 1 and the edge of the bag body 9. The two buckles 3 are configured with one male and one female. After the two retaining rings are tightened, the two buckles 3 are locked together to achieve secondary fixation. When it is necessary to open, the buckles 3 can be opened by gently pushing. Then, the retaining rings are unscrewed to loosen the bag opening of the ostomy bag body 2, which can be poured out and cleaned.
[0015] To extend service life and reduce operating costs, both the first spiral retaining ring 4 and the second spiral retaining ring 7 are made of hard plastic.
[0016] To enhance the sealing of this structure, a rubber sealing ring 8 is also provided on the inner wall of the second spiral retaining ring 7 at the end 9 of the bag to prevent leakage of excrement and to buffer pressure changes (such as abdominal movement).
[0017] When the patient needs to use it, cut it to the appropriate size according to the size of the stoma, attach the base plate 1 to the stoma, and then cover the first spiral retaining ring 4 on the base plate 1 with the second spiral retaining ring 7 on the bag body 9. Rotate the two rings 90 degrees clockwise to close them, and then align the two locking buckles 3 for secondary fixation. If the excrement in the stoma bag needs to be emptied, first push open the two locking buckles 3, and then rotate the two retaining rings counterclockwise to loosen the bag, which can then be emptied and cleaned.
[0018] As can be seen from the above embodiments, this utility model is similar to the opening and closing relationship of the mouth and lid of a commonly used thermos cup. The two retaining rings are closed by rotating 90 degrees clockwise and opened by rotating 90 degrees counterclockwise. It is very convenient for patients, does not require high technical skills from the operator, and does not require high finger strength and dexterity. It can be operated like unscrewing and closing a thermos cup. There is no need to press on the abdomen. The ostomy bag can be opened and closed smoothly by simply twisting left and right, and it will not put any pressure on the abdomen.
Claims
1. A two-piece ostomy bag with a spiral-type retaining ring closure structure, characterized in that, The ostomy bag includes a main body, a base plate, and a bag body. The base plate has a first spiral retaining ring with a first threaded opening on its outer wall. The bag body has a second spiral retaining ring with its outer wall connected to the ostomy bag body and a second threaded opening on its inner wall. The first and second threaded openings are compatible. When needed, the base plate is glued to the skin surface, and the second spiral retaining ring of the bag body is placed on top of the first spiral retaining ring of the base plate. After the threads of the two retaining rings are aligned, they are rotated at a certain angle to close.
2. The two-piece ostomy bag with a spiral retaining ring closure structure according to claim 1, characterized in that, The chassis edge and the bag body edge are provided with matching buckles.
3. The two-piece ostomy bag with a spiral clasp closure structure according to claim 1, characterized in that, Both the first and second spiral retaining rings are made of rigid plastic.
4. The two-piece ostomy bag with a spiral retaining ring closure structure according to claim 1, characterized in that, The first and second threaded openings will mesh tightly when rotated 90 degrees clockwise, and will open when rotated 90 degrees counterclockwise.
5. The two-piece ostomy bag with a spiral retaining ring closure structure according to claim 1, characterized in that, The inner wall of the second spiral retaining ring at the end of the bag is also equipped with a rubber sealing ring.