Combined cover and manufacturing method thereof

Abstract

The present invention discloses a combined cover and a manufacturing method thereof, including an outer cover, a rubber plug and an inner cover, wherein a rubber plug chamber is arranged inside the outer cover, an infusion hole is arranged outside the outer cover, an opening for placing the rubber plug is arranged inside the rubber plug chamber, the rubber plug is arranged inside the rubber plug chamber, and the inner cover is installed at the opening to restrict the rubber plug inside the rubber plug chamber; at least two pins are arranged extending downward inside the outer cover, and corresponding positions on the inner cover are arranged with sockets that cooperate with the pins; during installation, the pins are inserted into the corresponding sockets and fixed by rivets; the infusion hole is sealed by a sealing member. The present invention cleverly utilizes the matching of the pins and the sockets, and utilizes riveting technology to realize the connection between the inner cover and the outer cover, thereby overcoming the defects caused by conventional ultrasonic welding, avoiding the contamination of the liquid medicine in the infusion bag, and improving the reliability of the connection between the inner cover and the outer cover. A rounded corner is arranged at the lower end of the socket, and the gap between the socket and the pin is cleverly utilized to store the material after hot riveting, thereby avoiding the pin protruding from the surface of the inner cover after hot riveting.

Description

Technical Field

[0001] The invention relates to the field of infusion caps, and in particular to a combined cap and a manufacturing method thereof. Background Art

[0002] With the widespread application of infusion therapy in the medical field, infusion packaging products are constantly updated and developed in a simpler, cleaner and more convenient direction. The combination cover is usually composed of an inner cover, a rubber plug and an outer cover. The inner cover and the outer cover are connected by ultrasonic welding, but ultrasonic welding will inevitably transfer energy to the rubber plug, affecting the quality of the rubber plug; secondly, there is the possibility of cold welding, and powdery substances will be generated during the welding process, which will in turn pose a risk of affecting the drug solution. Therefore, a combination cover with a simple connection structure is urgently needed. Summary of the invention

[0003] In view of the defects of the above-mentioned prior art, the main purpose of the present invention is to overcome the shortcomings of the prior art and discloses a combined cover, including an outer cover, a rubber plug and an inner cover, wherein a rubber plug chamber is arranged in the outer cover, and the rubber plug chamber is located outside the outer cover and an infusion hole is arranged, and an opening for placing the rubber plug is arranged inside the rubber plug, the rubber plug is arranged in the rubber plug chamber, and the inner cover is installed at the opening to confine the rubber plug in the rubber plug chamber; at least two pins are extended downwardly inside the outer cover, and corresponding positions on the inner cover are provided with sockets that cooperate with the pins; during installation, the pins are inserted into the corresponding sockets and fixed by rivets; the infusion hole is sealed by a sealing member.

[0004] Furthermore, the end of the pin is provided with a rounded corner.

[0005] Furthermore, a mounting groove cooperating with the inner cover is recessed at the opening of the plug chamber.

[0006] Furthermore, six pins are provided and are evenly distributed around the circumference of the opening.

[0007] Furthermore, the sealing member is a pull ring, a folding handle or an aluminum film seal.

[0008] Furthermore, a first sealing protrusion is provided on the inner surface of the plug chamber, a second sealing protrusion is provided on the inner cover, and a first sealing groove and a second sealing groove tightly matched with the first sealing protrusion and the second sealing protrusion are respectively provided on the upper surface and the lower surface of the plug.

[0009] Furthermore, a rounded corner is arranged at the lower end of the jack.

[0010] A method for manufacturing a combined cover, the steps of producing the combined cover comprising:

[0011] S1, manufacturing the outer cover, inner cover and rubber plug respectively by injection molding machine;

[0012] S2, inserting the rubber plug into the rubber plug chamber of the outer cover;

[0013] S3, insert the pins of the outer cover into the corresponding holes on the inner cover, and use a hot riveting machine to hot-melt and rivet the ends of the pins to complete the installation of the inner cover and the outer cover.

[0014] Beneficial effects achieved by the present invention:

[0015] The present invention cleverly utilizes the combination of the pin and the socket, and utilizes the riveting technology to realize the connection between the inner cover and the outer cover, thereby overcoming the defects caused by conventional ultrasonic welding, avoiding the contamination of the liquid medicine in the infusion bag, and improving the reliability of the connection between the inner cover and the outer cover. A rounded corner is set at the lower end of the socket, and the gap between the socket and the pin is cleverly utilized to store the material after hot riveting, thereby preventing the pin from protruding from the surface of the inner cover after hot riveting. Sealing protrusions are set on the outer cover and the inner cover, and a matching sealing groove is set on the rubber plug to further improve the sealing performance of the rubber plug, while also realizing the positioning of the rubber plug, thereby avoiding displacement during use that affects the sealing performance of the combined cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a combined cover of the present invention;

[0017] Figure 2 for Figure 1 Bottom view of

[0018] Figure 3 for Figure 2 Sectional view of AA in the middle;

[0019] Figure 4 This is a schematic diagram of the matching of the inner cover and the outer cover after hot riveting is completed;

[0020] Figure 5 A schematic diagram of the structure of a combined cover with a pull ring structure;

[0021] Figure 6 A schematic diagram of the structure of a combined cover with a folding handle structure;

[0022] Figure 7 It is a structural schematic diagram of a combined cover of an aluminum film structure;

[0023] The reference numerals are as follows:

[0024] 1. Outer cover, 2. Rubber plug, 3. Inner cover, 4. Sealing member, 11. Rubber plug chamber, 12. Infusion hole, 13. Insertion needle, 14. Mounting groove, 15. First sealing protrusion, 21. First sealing groove, 22. Second sealing groove, 31. Insertion hole, 32. Second sealing protrusion. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] A combination cover, such as Figure 1-4 As shown, it includes an outer cover 1, a plug 2 and an inner cover 3. A plug chamber 11 is arranged inside the outer cover 1. An infusion hole 12 is arranged outside the plug chamber 11, and an opening for inserting the plug 2 is arranged inside the plug chamber 11. Usually, the opening matches the size of the plug 2, so that the plug can be smoothly inserted into the plug chamber 11. The plug 2 is placed in the plug chamber 11 with a tight fit, which plays a role in sealing between the inside and outside of the outer cover 1. The inner cover 3 is installed at the opening and fixedly connected to the outer cover 1 to limit the plug 2 in the plug chamber 11. In particular, at least two pins 13 are extended downward inside the outer cover 1, and a socket 31 that cooperates with the pins 13 is arranged at a corresponding position on the inner cover 3; when installing, the pin 13 is inserted into the socket 31 and fixed by riveting. The infusion hole 12 is sealed by a seal 4. When in use, it is only necessary to open the seal, and the infusion needle can pierce the plug 2 through the infusion hole 12 to enter the inner part of the outer cover 1.

[0027] In one embodiment, if Figure 1-4 As shown, the end of the pin 13 is provided with a rounded corner; the rounded corner facilitates the insertion of the pin 13 into the socket 31 and plays a guiding role.

[0028] In one embodiment, if Figure 1-4 As shown, a mounting groove 14 matching with the inner cover 3 is recessed at the opening of the plug chamber 11. That is, there is a step structure between the mounting groove 14 and the plug chamber 11 to limit the axial mounting position of the inner cover 3; the size of the mounting groove 14 is set to match the size of the inner cover 3 to limit the horizontal mounting position of the inner cover 3.

[0029] In one embodiment, if Figure 1-4 As shown, multiple pins 13 can be provided; for example, when two pins 13 are provided, the two pins 13 are respectively located at the two ends of the opening with a longer distance. When four pins are provided, two of them are respectively provided at the two ends of the opening with a longer distance, and the other two are respectively provided in the middle of the two sides of the opening. When six pins are provided, two of them are respectively provided at the two ends of the opening with a longer distance, and the remaining four are respectively and evenly provided on the two sides of the opening. Preferably, six pins 13 are provided.

[0030] In one embodiment, if Figure 1-4As shown, the inner surface of the plug chamber 11 is provided with a first sealing protrusion 15, the inner cover 3 is provided with a second sealing protrusion 32, and the upper surface and lower surface of the plug 2 are respectively provided with a first sealing groove 21 and a second sealing groove 22 which are tightly matched with the first sealing protrusion 15 and the second sealing protrusion 32. During installation, the first sealing protrusion 15 is inserted into the first sealing groove 21, and the second sealing protrusion 32 is inserted into the second sealing groove 22, which further improves the sealing between the plug 2 and the outer cover 1 and the inner cover 3.

[0031] In one embodiment, if Figure 1-4 As shown, a rounded corner is provided at the lower end of the plug hole 31. It can be seen that when riveting is not performed, a certain gap is formed between the plug pin 13 and the plug hole 31 by using the rounded corner, and the gap is used to store the hot-melted material at the end of the plug pin 13 to prevent the hot-riveted material from protruding from the surface of the inner cover 3.

[0032] The above structure can be used for combination covers of various structures. Figure 5 As shown, the seal 4 is configured as a pull ring structure, and the seal is a pull ring, a folding handle or an aluminum film seal. Figure 6 As shown, the seal 4 is configured as a folding handle. Figure 7 As shown, the sealing member 4 is configured as an aluminum film, and the aluminum film is directly attached to the outer cover 1 .

[0033] The present invention also discloses a method for manufacturing a combined cover. The steps of manufacturing the combined cover include:

[0034] S1, manufacturing the outer cover, inner cover and rubber plug respectively by injection molding machine;

[0035] S2, inserting the rubber plug into the rubber plug chamber of the outer cover;

[0036] S3, insert the pins of the outer cover into the corresponding holes on the inner cover, and use a hot riveting machine to hot-melt and rivet the ends of the pins to complete the installation of the inner cover and the outer cover.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced by equivalents without departing from the spirit and scope of the present invention, they should all be included in the protection scope of the claims of the present invention.

Claims

1. A combined cover, comprising an outer cover, a rubber plug and an inner cover, wherein a rubber plug chamber is arranged in the outer cover, the rubber plug chamber is located outside the outer cover and has an infusion hole, and an opening for placing the rubber plug is arranged inside the rubber plug, the rubber plug is arranged in the rubber plug chamber, and the inner cover is installed at the opening to confine the rubber plug in the rubber plug chamber; characterized in that: At least two pins are extended downward inside the outer cover, and corresponding positions on the inner cover are provided with sockets that cooperate with the pins. During installation, the pins are inserted into the corresponding sockets and fixed by rivets. The infusion hole is sealed by a sealing member. The end of the pin is provided with a rounded corner; A mounting groove matching the inner cover is recessed at the opening of the plug chamber; a stepped structure is provided between the mounting groove and the plug chamber to limit the axial mounting position of the inner cover; and the size of the mounting groove is set to match the size of the inner cover to limit the horizontal mounting position of the inner cover.

2. A combined cover according to claim 1, characterized in that: The number of the insertion pins is six and they are evenly distributed around the circumference of the opening.

3. A combined cover according to claim 1, characterized in that: The sealing member is a pull ring, a folding handle or an aluminum film seal.

4. A combined cover according to claim 1, characterized in that: A first sealing protrusion is arranged on the inner surface of the plug chamber, a second sealing protrusion is arranged on the inner cover, and a first sealing groove and a second sealing groove which are tightly matched with the first sealing protrusion and the second sealing protrusion are arranged on the upper surface and the lower surface of the plug respectively.

5. A combined cover according to claim 1, characterized in that: The lower end of the jack is provided with a rounded corner.

6. A method for manufacturing a combined cover, characterized in that: The steps of producing any of the combined covers of claims 1 to 5 include: S1, manufacturing the outer cover, inner cover and rubber plug respectively by injection molding machine; S2, inserting the rubber plug into the rubber plug chamber of the outer cover; S3, insert the pins of the outer cover into the corresponding holes on the inner cover, and use a hot riveting machine to hot-melt and rivet the ends of the pins to complete the installation of the inner cover and the outer cover.

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