Bottle cap

Abstract

The utility model belongs to the technical field of medical supplies, and particularly relates to a bottle cap which comprises a cap body, at least one containing cavity is formed in the top of the cap body, the containing cavity penetrates through the top of the cap body, a rubber block is arranged in the containing cavity, and the end, located on the inner side of the cap body, of the rubber block is a convex arc face. The convex arc-shaped face protrudes out of the inner top face of the cover body, and the thickness of the top of the cover body is 0.5-2 mm. According to the utility model, the rubber block is arranged in the accommodating cavity, so that the probability that the needle head is possibly contacted with hard plastic in the puncturing process is reduced; the end of the inner side of the rubber block is arranged to be the convex arc-shaped face, so that the height of the rubber block is increased, the probability that the rubber block falls off is reduced, the contact area between the rubber block and liquid medicine is increased, the pressing force between the rubber block and the needle head is improved, and leakage of the liquid medicine is avoided.

Description

Technical Field

[0001] The utility model relates to a bottle cap and belongs to the technical field of medical supplies. Background Art

[0002] Plastic medicine bottles for intravenous injection are manufactured by one-step molding with a blow-fill-seal device and are used for the packaging of injections. Compared with traditional glass medicine bottles, they have the advantages of being light, not easy to damage, not easy to hurt hands, easy to use, and easy to transport. They have been gradually applied in clinical practice. Since plastic materials are easy to deform, plastic medicine bottles for injection cannot be sealed with the same rubber plug as glass medicine bottles. They need to be sealed with a bottle cap made of hard plastic material. The inner side of the bottle cap is provided with an internal thread, and the outer side of the mouth of the medicine bottle is provided with an external thread that matches the internal thread. The bottle cap seals the medicine bottle by matching the bottle mouth thread. Since the hard plastic bottle cap is not elastic, it is impossible to inject the liquid medicine by directly piercing the needle like a rubber plug. In order to facilitate injection, the existing plastic bottle cap for medicine bottles generally has a through hole in the center of the bottle cap, and a rubber block is provided in the through hole. The shape and size of the rubber block are compatible with the shape and size of the through hole to achieve a sealing effect. When injection is required, the needle can be pierced through the rubber block. In order to ensure the stability of the rubber block and prevent it from falling off, a ring platform protruding from the inner top surface of the bottle cap is usually provided at the through hole in the center of the bottle cap, and an annular limiting shoulder is also provided at the end of the ring platform to limit the rubber block. Figure 1 As shown. Although this structure can effectively prevent the rubber block from falling off, it brings about a new problem: in order to prevent air from entering the infusion tube, medical staff will generally invert the medicine bottle when inserting the needle, that is, the bottle mouth faces downward, and then perform the needle insertion operation. In order to facilitate visual inspection of the needle insertion position, medical staff need to tilt the medicine bottle so that they can see the position of the rubber block and insert the needle. Due to the tilt of the medicine bottle, medical staff cannot insert the needle vertically very accurately. Moreover, whether in the outpatient department or the inpatient area, medical staff are very busy. They often find the rubber block and insert the needle immediately, without time to calibrate the needle insertion angle. The problem caused by this is that once the needle is deflected, it is easy to pierce into the ring platform at the through hole or the limit shoulder at the end of the ring platform, and the ring platform and the limit shoulder are both hard plastics and are not elastic. They cannot press the needle around the needle like rubber. Once punctured, there will be a gap between the hard plastic and the needle, and the injection liquid will flow out of the gap, causing leakage from the medicine bottle, wasting the injection liquid, and also bringing the risk of contamination. Utility Model Content

[0003] The utility model aims at the above defects of the prior art and provides a bottle cap to prevent the needle from piercing the hard plastic and causing leakage of the medicine liquid when the needle is deflected.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] A bottle cap comprises a cap body, wherein at least one accommodating cavity is provided on the top of the cap body, the accommodating cavity runs through the top of the cap body, a rubber block is provided in the accommodating cavity, the end of the rubber block located on the inner side of the cap body is a convex arc surface, the convex arc surface protrudes from the inner top surface of the cap body, and the thickness of the top of the cap body is 0.5-2mm.

[0006] On the basis of the above technical solution, the present invention can also make the following improvements:

[0007] Furthermore, an annular boss is provided on the inner top surface of the cover body and around the accommodating cavity, the rubber block is connected to the inner side surface of the annular boss, the convex arc surface is higher than the annular boss, and the height of the annular boss is 0.5-2.0 mm.

[0008] The beneficial effect of adopting the above-mentioned further technical solution is that the rubber block is connected to the inner side surface of the annular boss, and the contact surface between the rubber block and the cover body is increased by the annular boss, thereby improving the stability of the installation of the rubber block; and the height of the annular boss is much smaller than that of existing products. Therefore, even if the medical staff misaligns the needle, after the needle penetrates the rubber block, it is highly likely that it will not contact the annular boss, which greatly reduces the probability of piercing the hard plastic.

[0009] Furthermore, the inner diameter of the annular boss is greater than or equal to the inner diameter of the accommodating cavity, that is, the diameter of the convex arc surface of the rubber block is greater than the inner diameter of the accommodating cavity.

[0010] The beneficial effect of adopting the above further technical solution is that the inner diameter of the annular boss is larger than the inner diameter of the accommodating cavity, and a plane for installing the rubber block is formed between the inner side of the annular boss and the port of the accommodating cavity. By setting the diameter of the convex arc surface of the rubber block to be larger than the inner diameter of the accommodating cavity, the convex arc surface portion of the rubber block can be mounted on the port plane of the accommodating cavity, providing a limiting effect on one end of the inner side of the rubber block, thereby further improving the stability of the installation of the rubber block.

[0011] Furthermore, the accommodating cavity is provided with at least one expansion slot at the port located on the outer top surface of the cover body, the depth of the expansion slot is less than the thickness of the top of the cover body, and the end of the rubber block located on the outer side of the cover body is provided with an expansion rib, and the expansion rib is adapted to the expansion slot.

[0012] The beneficial effect of adopting the above-mentioned further technical solution is that the connection strength between the outer end of the rubber block and the accommodating cavity is improved by cooperating with the expansion groove and the expansion rib, thereby preventing the rubber block from falling off due to external force when medical staff insert the needle, and improving the stability of the rubber block installation.

[0013] Furthermore, the accommodating cavity is provided with an annular stepped hole at the port located on the outer top surface of the cover body, the depth of the stepped hole is less than the thickness of the top of the cover body, and the end side of the rubber block located on the outer side of the cover body is provided with a convex ring, which is adapted to the stepped hole.

[0014] The beneficial effect of adopting the above-mentioned further technical solution is that the connection strength between the outer end of the rubber block and the accommodating cavity is improved by cooperating between the annular stepped hole and the convex ring, thereby preventing the rubber block from falling off due to external force when medical staff insert the needle, and improving the stability of the rubber block installation.

[0015] Furthermore, the inner diameter of the annular boss is larger than the diameter of the convex ring, that is, the diameter of the convex arc surface is larger than the diameter of the convex ring.

[0016] The beneficial effect of adopting the above further technical solution is that the side of the rubber block that contacts the drug solution is set as a convex arc surface. During the infusion process, under the action of the gravity of the drug solution, the direction of the force applied to the convex arc surface is along a direction perpendicular to the convex arc surface, so that the rubber block can be pressed toward the direction of the needle, that is, pressed toward the center of the rubber block, and the size of the convex arc surface is as large as possible, the greater the force applied to it.

[0017] Furthermore, an easy-tear sealing film is provided on the top surface of the cover body corresponding to the accommodating cavity, and the easy-tear sealing film covers the rubber block.

[0018] The beneficial effect of adopting the above further technical solution is that the easy-tear sealing film protects the cleanliness of the accommodating cavity and the rubber block to avoid contamination.

[0019] Furthermore, the height of the convex arc surface protruding from the annular boss is 1-3 mm.

[0020] Furthermore, the cover is translucent or opaque.

[0021] The beneficial effect of adopting the above-mentioned further technical solution is that if the transparency of the cover body is too high, since the diameter of the convex arc surface of the rubber block is larger than the diameter of the convex ring, it is easy to cause visual errors for medical staff, making them mistakenly believe that the size of the convex arc surface is the size of the convex ring, and piercing the needle outside the convex ring, that is, piercing the cover body made of hard plastic material, causing leakage of the drug solution. This situation can be avoided by setting the cover body to be translucent or opaque.

[0022] Furthermore, the cover body and the rubber block are integrally formed by adopting a two-color injection molding technology.

[0023] The beneficial effects of the utility model are as follows: the utility model installs the rubber block through the accommodating cavity, thereby reducing the chance that the needle may contact the hard plastic during the insertion process; by setting the inner end of the rubber block as a convex arc surface, the height of the rubber block is increased, the probability of the rubber block falling off is reduced, and the contact area between the rubber block and the medicine liquid is increased, thereby improving the pressing force between the rubber block and the needle and avoiding leakage of the medicine liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural cross-sectional view of a bottle cap in the prior art;

[0025] Figure 2 It is a structural cross-sectional view of the bottle cap of Example 1;

[0026] Figure 3 is a structural cross-sectional view of the cover body of Example 1;

[0027] Figure 4 It is a structural cross-sectional view of the bottle cap of Example 2;

[0028] Figure 5 is a structural cross-sectional view of the cover body of Example 2;

[0029] Figure 6 It is a structural cross-sectional view of the bottle cap of Example 3;

[0030] Figure 7 is a structural cross-sectional view of the cover body of Example 3;

[0031] Figure 8 It is a schematic structural diagram of the rubber block of Example 3;

[0032] Fig. 9 Schematic diagram of the force direction of the rubber block in Example 3.

[0033] Fig.10 is a structural cross-sectional view of the bottle cap of Example 6;

[0034] Fig.11 is a top view of the cover body of Example 7;

[0035] Fig.12 is a top view of the rubber block of Example 7;

[0036] Fig.13 is a top view of the cover body of Example 8;

[0037] Fig.14 This is a top view of the rubber block of Example 8.

[0038] The reference numerals are recorded as follows: 1. cover body; 2. accommodating cavity; 3. rubber block; 4. convex arc surface; 5. easy-tear sealing film; 6. annular boss; 7. stepped hole; 8. convex ring; 9. expansion groove; 10. expansion rib. DETAILED DESCRIPTION

[0039] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0040] Example 1

[0041] See also Figure 2-3 A bottle cap comprises a cover 1, wherein the thickness of the top of the cover 1 is 0.5-2 mm, and specifically can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.2 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2.0 mm... Preferably, the thickness of the cover 1 is 1.0 mm, and a receiving cavity 2 is provided in the middle of the top of the cover 1, and the receiving cavity 2 runs through the top of the cover 1, and a rubber block 3 is provided in the receiving cavity 2, and the end of the rubber block 3 located on the inner side of the cover 1 is a convex arc surface 4, and the convex arc surface 4 protrudes from the inner top surface of the cover 1. The cover 1 of this embodiment is made of translucent or opaque material.

[0042] The diameter D of the convex arc surface 4 of the rubber block 3 is larger than the inner diameter d1 of the accommodating cavity 2 .

[0043] An easy-tear sealing film 5 is provided on the outer top surface of the cover body 1 corresponding to the accommodating cavity 2 , and a diameter d4 of the easy-tear sealing film 5 is larger than an inner diameter d1 of the accommodating cavity 2 , that is, the easy-tear sealing film 5 covers the rubber block 3 .

[0044] The bottle cap of this embodiment is prepared by a two-color injection molding process, and is processed by a two-color injection molding machine. The cover body 1 is firstly injection-molded, and then the rubber block 3 is injection-molded after pressure holding and cooling. After pressure holding and cooling, the bottle cap with the rubber block 3 and the cover body 1 as an integral structure is obtained.

[0045] Example 2

[0046] See also Figure 4-5 On the basis of Example 1, an annular boss 6 is provided on the inner top surface of the cover body 1 of this embodiment, and the annular boss 6 is provided at the port of the accommodating cavity 2 located on the inner top surface of the cover body 1. The convex arc surface 4 is higher than the annular boss 6, and the height h1 of the annular boss 6 is 0.5-2.0 mm, and can specifically be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.2 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2.0 mm... Preferably, the height h1 of the annular boss 6 is 1.0 mm. The inner diameter d2 of the annular boss 6 is larger than the inner diameter d1 of the accommodating cavity 2. The height h2 of the convex arc surface 4 protruding from the annular boss 6 is 1-3 mm (see Figure 4 ).

[0047] In this embodiment, the contact surface between the rubber block 3 and the cover body 1 is increased by the annular boss 6, the connection strength of the rubber block 3 is improved, and the stability of the installation of the rubber block 3 is improved; and the height of the annular boss 6 is much smaller than that of existing products. Therefore, even if the medical staff misaligns the needle, after the needle penetrates the rubber block 3, it is highly likely that it will not contact the annular boss 6, which greatly reduces the possibility of piercing the hard plastic. The inner diameter d2 of the annular boss 6 of this embodiment is larger than the inner diameter d1 of the accommodating cavity 2, and a plane for installing the rubber block 3 is formed between the inner side of the annular boss 6 and the port of the accommodating cavity 2 (see Figure 5 ), by setting the diameter D of the convex arc surface 4 of the rubber block 3 to be larger than the inner diameter d1 of the accommodating cavity 2, the convex arc surface 4 of the rubber block 3 can be mounted on the port plane of the accommodating cavity 2 (see Figure 4 ), the limiting effect on one end of the inner side of the rubber block 3 is enhanced, and the stability of the installation of the rubber block 3 is further improved.

[0048] Example 3

[0049] See also Figure 6-8 On the basis of Example 2, the accommodating cavity 2 of this embodiment is provided with an annular stepped hole 7 at the port located on the outer top surface of the cover body 1, the depth of the stepped hole 7 is less than the thickness of the top of the cover body 1, and the end side of the rubber block 3 located on the outer side of the cover body 1 is provided with a convex ring 8, and the convex ring 8 is adapted to the stepped hole 7. The diameter D of the convex arc surface 4 is greater than the diameter d3 of the convex ring 8, and the diameter d4 of the easy-tear sealing film 5 is greater than the diameter d3 of the convex ring 8.

[0050] In this embodiment, the connection strength of one end of the outer side of the rubber block 3 is improved by cooperating with the annular stepped hole 7 and the convex ring 8, so as to prevent the rubber block 3 from falling off due to external force during the process of the medical staff inserting the needle, thereby improving the stability of the installation of the rubber block 3. The diameter D of the convex arc surface 4 of this embodiment is greater than the diameter d3 of the convex ring 8. The side of the rubber block 3 that contacts the liquid medicine is set as the convex arc surface 4. During the infusion process, under the action of the gravity of the liquid medicine, the direction of the force on the convex arc surface 4 is along the direction perpendicular to the convex arc surface 4 (see Fig. 9 ), so the rubber block 3 can be pressed toward the needle head, that is, pressed toward the center of the rubber block 3, and at the same liquid level, the size of the convex arc surface 4 is as large as possible, the greater the force applied, the greater the force pressing the rubber block 3 toward the needle head. The diameter d4 of the easy-tear sealing film 5 is greater than the diameter d3 of the convex ring 8, and the easy-tear sealing film 5 protects the cleanliness of the accommodating chamber 2 and the rubber block 3 to avoid contamination.

[0051] Example 4

[0052] Different from the first embodiment, the present embodiment is provided with two accommodating chambers 2, each of which is provided with a rubber block 3. The rest is the same as the first embodiment and will not be described in detail.

[0053] Example 5

[0054] The difference from the second embodiment is that the present embodiment is provided with two accommodating chambers 2, each of which is provided with a rubber block 3. The rest is the same as the second embodiment and will not be described in detail.

[0055] Example 6

[0056] See also Fig.10 , which is different from the embodiment 3, the present embodiment is provided with two accommodating chambers 2, each of which is provided with a rubber block 3. The rest is the same as the embodiment 3 and will not be described in detail.

[0057] Example 7

[0058] See also Figure 11-12 , which is different from Example 2, the accommodating cavity 2 of this embodiment is provided with an expansion slot 9 at the port located on the outer top surface of the cover body 1, the depth of the expansion slot 9 is less than the thickness of the top of the cover body 1, and the end side of the rubber block 3 located on the outer side of the cover body 1 is provided with an expansion rib 10, and the expansion rib 10 is adapted to the expansion slot 9. The rest is the same as Example 2 and will not be repeated.

[0059] Example 8

[0060] Different from Example 7, the expansion slots 9 and expansion ribs 10 of this embodiment can be provided in plurality, for example, two, three, four, five, six, seven, eight, nine, ten... In this embodiment, the expansion slots 9 and expansion ribs 10 are provided in six respectively, and the rest are the same as Example 7 and will not be repeated.

[0061] The above description is only 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 in the protection scope of the present invention.

Claims

1. A bottle cap, comprising a cap body, characterized in that: At least one accommodating cavity is provided on the top of the cover body, and the accommodating cavity runs through the top of the cover body. A rubber block is provided in the accommodating cavity. The end of the rubber block located on the inner side of the cover body is a convex arc surface, and the convex arc surface protrudes from the inner top surface of the cover body. The thickness of the top of the cover body is 0.5-2mm.

2. The bottle cap according to claim 1, characterized in that: An annular boss is provided on the inner top surface of the cover body and around the accommodating cavity, the rubber block is connected to the inner side surface of the annular boss, the convex arc surface is higher than the annular boss, and the height of the annular boss is 0.5-2.0 mm.

3. The bottle cap according to claim 2, characterized in that: The inner diameter of the annular boss is greater than or equal to the inner diameter of the accommodating cavity.

4. The bottle cap according to claim 3, characterized in that: The accommodating cavity is provided with at least one expansion slot at the port located on the outer top surface of the cover body, the depth of the expansion slot is less than the thickness of the top of the cover body, and the end of the rubber block located on the outer side of the cover body is provided with an expansion rib, and the expansion rib is adapted to the expansion slot.

5. The bottle cap according to claim 3, characterized in that: The accommodating cavity is provided with an annular stepped hole at the port located on the outer top surface of the cover body, the depth of the stepped hole is less than the thickness of the top of the cover body, and the end side of the rubber block located on the outer side of the cover body is provided with a convex ring, which is adapted to the stepped hole.

6. The bottle cap according to claim 5, characterized in that: The inner diameter of the annular boss is greater than the diameter of the convex ring.

7. The bottle cap according to any one of claims 1 to 6, characterized in that: An easy-tear sealing film is arranged on the top surface of the cover body, and the easy-tear sealing film covers the rubber block.

8. The bottle cap according to claim 6, characterized in that: The height of the convex arc surface protruding from the annular boss is 1-3 mm.

9. The bottle cap according to claim 8, characterized in that: The cover is translucent or opaque.

10. The bottle cap according to claim 1, characterized in that: The cover body and the rubber block are integrally formed by adopting a two-color injection molding technology.

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