Double-layer slow-release capsule

Abstract

The utility model provides a double-layer slow-release capsule which comprises an outer capsule body and an inner capsule body, an inner storage cavity is formed in the inner capsule body, and an outer storage cavity is formed between the inner capsule body and the outer capsule body; the outer bag body comprises a shell and an end cap buckled at the open end of the shell, a plurality of annular protrusions are arranged on the outer wall of the open end of the shell, clamping grooves matched with the annular protrusions are formed in the inner wall of the end cap, and a limiting table matched with the end cap at the open end of the shell is arranged on the inner wall of the end cap; the inner bag body comprises an inner shell and an inner cap body buckled at the open end of the inner shell, and a plurality of convex rings are arranged on the outer wall of the open end of the inner shell; the inner shell is fixed to the inner wall of the outer shell through a plurality of shell connecting rods, the inner cap body is fixed to the end cap through a plurality of cap body connecting rods, or the end, away from the inner shell, of the inner cap body is directly fixed to the inner wall of the end cap. An inner storage cavity is formed in the inner capsule body, an outer storage cavity is formed in the capsule, an inner cavity and an outer cavity which are independent are formed, and different drugs can be contained in the two cavities so that the drug effects can be exerted in sequence.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of hollow capsule products, in particular to a double-layer sustained-release capsule. BACKGROUND

[0002] The existing capsule packaging is to directly fill the contents in the capsule shell, and people can swallow the capsule to take medicine without contacting the contents, which solves the problems of difficult entry and poor taste for the taker, and realizes the effect of medicine without bitterness. The common sustained-release capsule is mainly made by increasing the thickness of the capsule shell or using special materials to make the capsule shell, so as to prolong the dissolution time of the capsule shell and prolong or delay the time of drug effect. With the development of medical level, it is also necessary to develop capsule products for special types of drugs. In the prior art, when the dissolution sequence needs to be distinguished to achieve a specific drug effect, the taker needs to take the medicine twice, which causes psychological pressure to the taker, and the taker cannot well control the time interval, which may also affect the drug effect. Therefore, it is necessary to design a double-layer capsule to simplify the medicine taking process. SUMMARY

[0003] Therefore, the present application aims to overcome the defects in the prior art and provides a double-layer sustained-release capsule.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0005] A double-layer sustained-release capsule comprises an outer capsule body and an inner capsule body, an inner storage cavity is formed in the inner capsule body, and an outer storage cavity is formed between the inner capsule body and the outer capsule body; the outer capsule body comprises an outer shell and an end cap buckled to the open end of the outer shell, a plurality of annular protrusions are arranged on the outer wall of the open end of the outer shell, a plurality of clamping grooves matched with the annular protrusions are arranged on the inner wall of the end cap, and a limiting table matched with the end cap of the open end of the outer shell is arranged on the inner wall of the end cap; the inner capsule body comprises an inner shell and an inner cap body buckled to the open end of the inner shell, and a plurality of protruding rings are arranged on the outer wall of the open end of the inner shell; the inner shell is fixed to the inner wall of the outer shell through a plurality of shell connecting rods, the inner cap body is fixed to the end cap through a plurality of cap body connecting rods, or the end of the inner cap body away from the inner shell is directly fixed to the inner wall of the end cap; the open end of the inner shell protrudes out of the outer shell, the open end of the inner cap body protrudes out of the end cap, and the inner wall of the open end of the inner cap body has a conical guide surface, and the outer wall of the open end of the end cap is provided with an inclined transition surface.

[0006] Further, the inner shell and the outer shell are coaxially arranged.

[0007] Further, the inner cap body and the end cap are coaxially arranged.

[0008] Further, a plurality of slits are arranged on the open end of the end cap.

[0009] Further, the slits are arranged in 2-5 lines evenly around the axis of the end cap.

[0010] Further, the length of the slits is 1 / 7-1 / 4 of the total length of the end cap.

[0011] Further, the outer wall of the open end of the outer shell is provided with 2-5 annular protrusions.

[0012] Further, the outer wall of the open end of the inner shell is provided with 1-3 protrusion rings.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] The present application has a reasonable structure design, the open end of the inner shell extends out of the outer shell, the open end of the inner cap extends out of the end cap, and the inner wall of the open end of the inner cap has a tapered guide surface, which is very convenient for the end cap to be buckled on the outer shell, the inner cap to be buckled on the inner shell at the same time, and the inner storage cavity to be formed inside the inner capsule, the outer storage cavity to be formed between the inner capsule and the outer capsule, and the two independent cavities to be formed, different drugs can be loaded in the two cavities, and the drugs can play their effects in sequence after being taken, thereby achieving the effect of replacement therapy. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments illustrated in the drawings are provided to explain the present application and, do not limit the present application in any way. In the drawings:

[0016] Figure 1 is a schematic view of the outer shape of the present application;

[0017] Figure 2 is a sectional view of the present application;

[0018] Figure 3 is a schematic view of the outer shape of the outer shell in the present application;

[0019] Figure 4 is a schematic view of the outer shape of the end cap in the present application;

[0020] Figure 5 is a sectional view of the outer shell part in the present application;

[0021] Figure 6 is a sectional view of the end cap part in the present application;

[0022] Figure 7 is Figure 5 a schematic view of the outer shell;

[0023] Figure 8 is Figure 6 a schematic view of the end cap. DETAILED DESCRIPTION

[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 type of double-layered sustained-release capsule, such as Figures 1 to 8 As shown, the device includes an outer capsule 1 and an inner capsule 2. An inner storage cavity is formed inside the inner capsule, and an outer storage cavity 3 is formed between the inner capsule and the outer capsule. The outer capsule includes a shell 4 and an end cap 5 that is fastened to the open end of the shell. The outer wall of the open end of the shell has several annular protrusions 6. Typically, the height of the annular protrusions 6 protruding from the shell is less than 0.5 mm. The inner wall of the end cap has a groove 7 that mates with each annular protrusion, and the inner wall of the end cap has a limiting platform 16 that mates with the end cap at the open end of the shell.

[0029] When the end cap is buckled on the shell, the end cap of the outer capsule is buckled on the shell (including the inner cap of the inner capsule and the inner shell) after the end cap of the outer shell is buckled on the limiting table, so as to facilitate production. The inner capsule comprises an inner shell 8 and an inner cap 9 buckled on the open end of the inner shell, and the outer wall of the open end of the inner shell is provided with a plurality of protruding rings 10. Generally, the height of the protruding ring 10 protruding from the outer shell is less than 0.5 mm. As an example, the outer wall of the open end of the shell is provided with 2-5 annular protrusions. The outer wall of the open end of the inner shell is provided with 1-3 protruding rings.

[0030] After the end cap is buckled on the shell, the clamping grooves are matched with the corresponding annular protrusions respectively, so as to ensure firm fixation between the end cap and the shell and avoid the end cap from falling off the shell. At the same time, the matching of the clamping grooves and the annular protrusions can play a sealing role to avoid leakage of the drug powder inside the outer capsule. Moreover, when the end cap is buckled on the shell, the inner cap is buckled on the inner shell at the same time, so that a closed inner storage cavity is formed inside the inner capsule. Since the outer wall of the open end of the inner shell is provided with a plurality of protruding rings, the protruding rings can effectively contact the inner wall of the inner cap after the inner cap is buckled on the open end of the inner shell, so as to ensure the sealing property and avoid leakage of the drug powder inside the inner capsule.

[0031] The inner shell is fixed to the inner wall of the shell through a plurality of shell connecting rods 11, and the inner cap is fixed to the end cap through a plurality of cap connecting rods 12, or the end of the inner cap away from the inner shell is directly fixed to the inner wall of the end cap. The open end of the inner shell protrudes out of the shell, the open end of the inner cap protrudes out of the end cap, and the inner wall of the open end of the inner cap has a tapered guide surface 13, which is very convenient for buckling the inner cap on the inner shell. The tapered guide surface plays a role in guiding the buckling of the inner cap on the inner shell. The outer wall of the open end of the end cap is provided with an inclined transition surface 14, which is connected with the surface of the shell to avoid the formation of a step between the end cap and the shell, so that the end cap can be more smoothly inhaled when taken.

[0032] The inner shell and the outer shell are coaxially arranged. The inner cap and the end cap are coaxially arranged. The open end of the end cap is provided with a plurality of slits 15, which are designed to facilitate the buckling of the end cap on the open end of the shell. The end of the slit adopts an arc structure to avoid tearing and damage of the end cap from the slit. Generally, the slits are uniformly arranged at 2-5 positions with the axis of the end cap as the center. Preferably, the length of the slit is 1 / 7-1 / 4 of the total length of the end cap.

[0033] The structure of the present application is reasonable. The open end of the inner shell protrudes out of the shell, the open end of the inner cap protrudes out of the end cap, and the inner wall of the open end of the inner cap has a tapered guide surface, which is very convenient for buckling the end cap on the shell at the same time. The inner cap is buckled on the inner shell, and an inner storage cavity is formed inside the inner capsule. An outer storage cavity is formed between the inner capsule and the outer capsule, forming two independent cavities inside and outside. Different drugs can be loaded in the two cavities to play the drug effect in sequence after taking, thereby achieving the effect of replacement treatment.

[0034] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A double-layered sustained-release capsule, characterized in that: The device comprises an outer capsule and an inner capsule, with an inner storage cavity formed inside the inner capsule and an outer storage cavity formed between the inner and outer capsules. The outer capsule includes an outer shell and an end cap fastened to the open end of the outer shell. The outer wall of the open end of the outer shell has several annular protrusions, and the inner wall of the end cap has grooves that mate with each annular protrusion. The inner wall of the end cap has a limiting platform that mates with the end cap at the open end of the outer shell. The inner capsule includes an inner shell and an inner cap fastened to the open end of the inner shell. The outer wall of the open end of the inner shell has several protruding rings. The inner shell is fixed to the inner wall of the outer shell by several shell connecting rods, and the inner cap is fixed to the end cap by several cap connecting rods. Alternatively, the end of the inner cap away from the inner shell is directly fixed to the inner wall of the end cap. The open end of the inner shell extends outward from the outer shell, and the open end of the inner cap extends outward from the end cap. The inner wall of the open end of the inner cap has a conical guide surface, and the outer wall of the open end of the end cap has an inclined transition surface.

2. The double-layer sustained-release capsule according to claim 1, characterized in that: The inner shell and the outer shell are arranged coaxially.

3. The double-layer sustained-release capsule according to claim 1, characterized in that: The inner cap body and the end cap are arranged coaxially.

4. The double-layer sustained-release capsule according to claim 1, characterized in that: The open end of the cap has several slits.

5. A double-layer sustained-release capsule according to claim 4, characterized in that: The slits are evenly distributed in 2-5 rows centered on the axis of the end cap.

6. A double-layer sustained-release capsule according to claim 4, characterized in that: The slit length is 1 / 7 to 1 / 4 of the total length of the end cap.

7. A double-layer sustained-release capsule according to claim 1, characterized in that: The outer wall of the open end of the shell is provided with 2-5 annular protrusions.

8. A double-layer sustained-release capsule according to claim 1, characterized in that: The outer wall of the open end of the inner shell is provided with 1-3 raised rings.

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