Double-cavity empty capsule
By designing the connection between the outer and inner capsules and the protruding ring structure, the problem of the complex structure of existing double-cavity hollow capsules was solved, achieving independent storage of drugs and stable efficacy, and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG SHICHENG CAPSULE CO LTD
- Filing Date
- 2025-04-24
- Publication Date
- 2026-04-21
AI Technical Summary
Existing dual-cavity empty capsules have complex structures, high production costs, and cannot effectively prevent the two drugs from mixing before administration.
A dual-cavity hollow capsule was designed, comprising an outer capsule and an inner capsule. The outer capsule and the inner capsule are connected by a connecting part and a raised ring structure to ensure a stable connection and good sealing between the inner capsule and the outer capsule. Independent cavities are formed inside the inner capsule and between the outer capsule to avoid drug contact.
It achieves a simple and reasonable structural design, ensuring independent storage of drugs, ensuring stable efficacy, and reducing production costs.
Smart Images

Figure CN224141231U_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of capsule product technology, and in particular relates to a double-cavity hollow capsule. Background Technology
[0002] Traditional empty capsules generally have only one cavity. However, in clinical medication, there are sometimes situations where two medications need to be taken simultaneously. Moreover, to avoid interactions between drug components during production and storage, the two medications cannot be mixed before administration. To meet this medication requirement, although there are existing empty capsule products with double cavities, these double-cavity capsules have a more complex structure and higher manufacturing costs, increasing the costs for manufacturers. Therefore, it is necessary to improve existing double-cavity capsule products. Summary of the Invention
[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a double-cavity hollow capsule.
[0004] To achieve the above objectives, the technical solution created by this invention is implemented as follows:
[0005] A double-cavity hollow capsule includes an outer capsule and an inner capsule. The open end of the outer capsule is provided with a connecting portion. The inner capsule contains an inner cavity, and an outer cavity is provided between the outer capsule and the inner capsule. The inner capsule includes a spherical cap portion and a main body portion. A positioning platform is formed at the junction of the main body portion and the spherical cap portion. The spherical cap portion is exposed at the open end of the outer capsule. The main body portion is inserted into the outer capsule through the open end of the outer capsule. A connecting section that mates with the connecting portion is provided between the main body portion and the spherical cap portion. The connecting section is columnar and has several raised rings on its outer wall.
[0006] Furthermore, the protruding ring protrudes 0.1-0.3 mm from the outer wall surface of the main body.
[0007] Furthermore, the raised ring has 3-5 rings.
[0008] Furthermore, the main body has a conical structure, and its outer diameter gradually decreases from the side closer to the connecting section to the side farther away from the connecting section.
[0009] Furthermore, the main body includes a capsule segment and a capsule cap segment, with the capsule cap segment located on the side of the capsule segment away from the connecting segment, and the capsule cap segment being fastened to the capsule segment.
[0010] Furthermore, the connecting part has a cylindrical structure, and its outer wall transitions to the outer wall of the outer capsule through a slope.
[0011] Furthermore, the end of the connecting part is provided with a tapered guide structure.
[0012] Furthermore, the outer capsule has a teardrop-shaped structure.
[0013] Compared with existing technologies, the present invention has the following advantages:
[0014] This invention features a simple and rational design. The spherical cap of the inner capsule is exposed outside the teardrop-shaped outer capsule. The opening of the outer capsule mates with the positioning platform of the inner capsule. Simultaneously, the connecting part of the outer capsule mates with the connecting section of the inner capsule, ensuring the structural stability of the inner and outer capsules and providing excellent sealing. A cavity is formed inside the inner capsule and between the inner and outer capsules, allowing for independent storage of the drug and preventing contact between the drugs in the two cavities, thus ensuring stable efficacy. Attached Figure Description
[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:
[0016] Figure 1 A schematic diagram of the structure created by this invention;
[0017] Figure 2 for Figure 1 A schematic diagram of the inner and outer capsules after dissection;
[0018] Figure 3 for Figure 1 A schematic diagram showing the outer and inner capsules after being dissected.
[0019] Figure 4 A schematic diagram illustrating the outer capsule portion of this invention;
[0020] Figure 5 This is a schematic diagram of the inner capsule portion in the present invention;
[0021] Figure 6 This is a schematic diagram of the inner capsule after the cap segment has been removed in the present invention;
[0022] Figure 7 A schematic diagram of the cap segment of the inner capsule in this invention;
[0023] Figure 8 for Figure 6 Enlarged view of the structure at point A in the middle. Detailed Implementation
[0024] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.
[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0027] The invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0028] A double-cavity empty capsule, such as Figures 1 to 8 As shown, it includes an outer capsule 1 and an inner capsule 2. Typically, the outer capsule is roughly teardrop-shaped. The open end of the outer capsule has a connecting part 3; the inner capsule has an inner cavity 4, and an outer cavity 5 is provided between the outer capsule and the inner capsule. The inner cavity and the outer cavity can be independently filled with drugs to avoid contact between the drugs in the two cavities and ensure stable drug efficacy.
[0029] The inner capsule includes a spherical cap portion 6 and a main body portion 7. A positioning platform 8 is formed at the junction of the main body portion and the spherical cap portion. The spherical cap portion protrudes from the open end of the outer capsule, and the main body portion is inserted into the outer capsule through the open end of the outer capsule. When the main body portion of the inner capsule is inserted into the outer capsule, the open end face of the outer capsule abuts against the positioning platform to achieve positioning and ensure the structural stability between the inner and outer capsules.
[0030] A connecting section 9, which mates with the connecting part, is provided between the main body and the cap part. This connecting section is columnar, and several raised rings 10 are provided on the outer wall of the connecting section. Figure 8As shown. The connecting section of the inner bladder fits into the connecting part of the outer bladder. The inner wall of the connecting part fits into the raised ring on the outer wall of the connecting section. The raised ring not only increases friction but also effectively maintains the seal between the inner and outer bladders.
[0031] To facilitate insertion of the inner capsule, the end of the connecting portion is provided with a tapered guide structure 15. The connecting portion has a cylindrical structure, and its outer wall transitions to the outer wall 14 of the outer capsule through a slope 13, ensuring a smooth transition between the outer wall of the outer capsule and the outer wall of the connecting portion, thus guaranteeing smooth swallowing during medication. Typically, the raised ring protrudes 0.1-0.3 mm from the outer surface of the main body. As an example, there are 3-5 raised rings.
[0032] To facilitate the insertion of the inner capsule into the outer capsule, in an optional embodiment, the main body has a conical structure with its outer diameter gradually decreasing from the side closer to the connecting section to the side farther away from the connecting section. The main body includes a capsule segment 11 and a capsule cap segment 12. The capsule cap segment is located on the side of the capsule segment farther from the connecting section and is fastened to the capsule segment. Since the capsule cap segment is located inside the outer capsule, it is not easily dislodged due to impact.
[0033] This invention features a simple and rational design. The spherical cap of the inner capsule is exposed outside the teardrop-shaped outer capsule. The opening of the outer capsule mates with the positioning platform of the inner capsule. Simultaneously, the connecting part of the outer capsule mates with the connecting section of the inner capsule, ensuring the structural stability of the inner and outer capsules and providing excellent sealing. A cavity is formed inside the inner capsule and between the inner and outer capsules, allowing for independent storage of the drug and preventing contact between the drugs in the two cavities, thus ensuring stable efficacy.
[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A double cavity hollow capsule characterized in that: It includes an outer capsule and an inner capsule. The open end of the outer capsule has a connecting part. The inner capsule has an inner cavity, and there is an outer cavity between the outer capsule and the inner capsule. The inner capsule includes a spherical cap part and a main body part. The connection between the main body part and the spherical cap part forms a positioning platform. The spherical cap part is exposed at the open end of the outer capsule. The main body part is inserted into the outer capsule through the open end of the outer capsule. There is a connecting section between the main body part and the spherical cap part that mates with the connecting part. The connecting section is columnar and has several protruding rings on its outer wall.
2. A double cavity hollow capsule according to claim 1, characterized in that: The protruding ring protrudes 0.1-0.3 mm from the outer wall surface of the main body.
3. A double cavity hollow capsule according to claim 1, characterized in that: The raised ring has 3-5 rings.
4. A double cavity hollow capsule according to claim 1, characterized in that: The main body has a conical structure, and its outer diameter gradually decreases from the side closer to the connecting section to the side farther away from the connecting section.
5. A double cavity hollow capsule according to claim 1, characterized in that: The main body includes a capsule segment and a capsule cap segment. The capsule cap segment is located on the side of the capsule segment away from the connecting segment, and the capsule cap segment is fastened to the capsule segment.
6. A double cavity hollow capsule according to claim 1, characterized in that: The connecting part has a cylindrical structure, and its outer wall is connected to the outer wall of the outer capsule by a slope.
7. A double cavity hollow capsule according to claim 1, characterized in that: The end of the connecting part is provided with a tapered guide structure.
8. A double cavity hollow capsule according to any one of claims 1 to 7, characterized in that: The outer capsule has a teardrop-shaped structure.