Filling plug for reducing injection loss and injector
By designing a filling plug to reduce injection loss, the problem of drug residue in microneedle injectors was solved, enabling sufficient drug flow and dosage control, thus improving treatment efficacy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU WEIMOU MEDICAL INSTR CO LTD
- Filing Date
- 2024-12-16
- Publication Date
- 2026-04-17
AI Technical Summary
In existing microneedle injectors, medication can easily remain in the gap between the needles, leading to medication waste and difficulty in controlling the injection dosage, thus affecting the treatment effect.
A filler plug for reducing injection loss is designed, comprising a main body and a boss. The main body and the boss abut against the inner wall of the needle body to form an intermediate channel that communicates with the flow channel of the needle body, thereby reducing drug residue.
It effectively reduces drug residue, ensures sufficient drug flow, avoids waste, ensures accurate dosage for each injection, and improves treatment efficacy.
Smart Images
Figure CN224126371U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of syringe technology, and in particular to a filler plug and syringe for reducing injection loss. Background Technology
[0002] With the gradual development of medical devices, microneedle injectors have been applied in treatment processes due to their unique injection effects. Microneedle injectors are a technology that uses tiny needles for drug delivery. These tiny needles are extremely small, typically ranging from tens to hundreds of micrometers in diameter and from hundreds of micrometers to several millimeters in length. Microneedle injectors can deliver drugs directly to the dermis or subcutaneous tissue by penetrating the skin's surface using these fine needles. This delivery method avoids the pain and infection risks associated with traditional injection methods and also improves drug absorption efficiency. Because microneedles can directly deliver drugs to specific layers of the skin, this helps improve drug absorption efficiency. For some drugs that require absorption through the skin, microneedle injectors can significantly enhance their bioavailability.
[0003] Existing microneedle injectors consist of a needle, a syringe barrel, and an injection filler plug. The needle is directly connected to the injection container (such as a medicine vial or syringe), and the base of the needle tip is hollow. When drawing medication, the injection plunger works in conjunction with the syringe barrel to draw the medication. However, there is a gap of tens of microliters of medication in the hollow tail of the needle, resulting in some medication remaining in this gap and not being completely injected into the patient. This represents a significant waste for expensive medications or gene-based drugs that are difficult to cultivate, not only wasting the medication but also affecting dosage control and thus the therapeutic effect.
[0004] Therefore, it is necessary to design a filler plug to reduce injection loss in order to solve the above problems. Utility Model Content
[0005] In view of this, in order to overcome the shortcomings of the prior art, this utility model provides a filling plug and syringe for reducing injection loss, which effectively solves the problem that some drug solution remains in the needle gap of the existing microneedle syringe, causing drug solution waste and affecting the control of injection dosage.
[0006] According to a first aspect of the present invention, a filler for reducing injection loss is provided for a syringe, the syringe including a needle body and a syringe barrel body, wherein the filler for reducing injection loss includes a main body portion and a boss portion, the boss portion being disposed at one end of the main body portion, the boss portion protruding from one end of the main body portion toward a direction close to the needle body, the size of the main body portion being larger than the size of the boss portion, the outer wall of the main body portion and the outer wall of the boss portion both abutting against the inner wall of the needle body, the main body portion and the boss portion both having an intermediate channel, the intermediate channel communicating with a first flow channel of the needle body.
[0007] Preferably, the needle body has a first cavity and a second cavity that are connected to each other. The second cavity is used to accommodate the end of the syringe body. The first cavity is located away from the end of the syringe body. The main body abuts against the side wall of the second cavity. The boss portion is accommodated in the first cavity.
[0008] Preferably, the intermediate channel, the first flow channel of the needle body, and the second flow channel of the syringe body are arranged coaxially.
[0009] Preferably, both the boss portion and the main body portion are formed into a cylindrical structure.
[0010] Preferably, the diameter of the boss portion is 2-3 mm and the height is 1-1.5 mm.
[0011] According to a second aspect of the present invention, a syringe is provided, wherein the syringe includes a filler plug for reducing injection loss as described above.
[0012] Preferably, the syringe includes a needle head and a syringe barrel, and the filler plug for reducing injection loss is disposed between the needle head and the syringe barrel.
[0013] Preferably, the syringe portion includes the syringe body and the filler plug for reducing injection loss, the filler plug for reducing injection loss is disposed at the end of the syringe body, and the size of the main body portion is smaller than the size of the end of the syringe body.
[0014] Preferably, the needle tip includes the needle body and the filler plug for reducing injection loss, wherein the filler plug for reducing injection loss is disposed inside the needle body.
[0015] Preferably, the filler plug for reducing injection loss can be disposed inside the needle body, and when the filler plug for reducing injection loss is disposed inside the needle body, the end of the syringe portion abuts against the main body portion.
[0016] According to this utility model, the filler plug for reducing injection loss, through the cooperation of the main body and the boss, can fully fill the gap between the needle body and the syringe body, allowing the medication to be fully discharged and reducing medication residue. Because of the filler plug, the contact area and sealing pressure between the needle body and the syringe body are increased, reducing medication waste caused by the gap and minimizing the possibility of medication loss through the gap. The filler plug has a simple overall structure and is easy to assemble; it only needs to be installed between the needle body and the syringe body. It enables convenient and rapid medication flow and injection, avoiding medication waste, and allows for control of the injection dosage, ensuring that the expected dose is achieved with each injection, thereby improving the therapeutic effect.
[0017] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 A schematic diagram of the structure of a filler plug for reducing injection loss according to an embodiment of the present invention is shown;
[0020] Figure 2 A cross-sectional view of a filler plug for reducing injection loss according to an embodiment of the present invention is shown;
[0021] Figure 3 A schematic diagram of the syringe according to an embodiment of the present invention is shown;
[0022] Figure 4 An exploded view of a syringe according to an embodiment of the present invention is shown;
[0023] Figure 5 A cross-sectional view of a syringe according to an embodiment of the present invention is shown;
[0024] Figure 6 Embodiments according to the present invention are shown. Figure 5 An enlarged schematic diagram of the structure at point A.
[0025] Reference numerals: 101-Main body; 102-Protrusion; 103-Intermediate channel; 2-Needle body; 201-First flow channel; 202-First cavity; 203-Second cavity; 3-Syringe body; 301-Second flow channel. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0027] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0028] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0029] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" 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 can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0030] According to a first aspect of this utility model, a filler plug for reducing injection loss is provided, such as... Figures 1 to 6 As shown, the injection loss reduction filler is used in a syringe, and more specifically, in a microneedle syringe. The syringe may include a needle body 2 and a syringe body 3, which can be mated together to allow the medication in the syringe body 3 to flow to the needle body 2 for injection. The injection loss reduction filler can be located inside the needle body 2 and fills the gap inside the needle body 2. This gap occurs because the syringe body 3 cannot be completely contained inside the needle body 2 when the needle body 2 and syringe body 3 are mated together, resulting in medication retention and waste. Since the injection loss reduction filler can fill this gap, medication waste can be effectively reduced. The injection loss reduction filler includes a main body portion 101 and a boss portion 102.
[0031] In the following description, reference will be made to Figures 1 to 6 The detailed structure of the main body 101 and the boss 102 of the filler plug for reducing injection loss is described in detail.
[0032] like Figures 1 to 6 As shown, in this embodiment, a boss 102 is disposed at one end of the main body 101. The boss 102 protrudes from one end of the main body 101 toward the direction close to the needle body 2 to fit into the cavity inside the needle body 2. The boss 102 can be integrally formed with the main body 101. The size of the main body 101 is larger than the size of the boss 102, because the cavity inside the needle body 2 is along... Figure 5 The dimensions gradually decrease from right to left. Therefore, to accommodate the shape of the cavity inside the needle body 2 and ensure that the cavity is fully filled, the size of the main body 101 is larger than the size of the boss 102. Simultaneously, the outer walls of both the main body 101 and the boss 102 abut against the inner wall of the needle body 2 to ensure that the interior of the needle body 2 is fully filled and to reduce the possibility of gaps. Furthermore, the main body 101 and the boss 102 can be interference-fitted with the cavity inside the needle body 2 to ensure adequate sealing.
[0033] Furthermore, such as Figure 5 and Figure 6 As shown, in order to facilitate the flow of the medicine, both the main body 101 and the boss 102 are provided with intermediate channels 103. The intermediate channels 103 are connected to the first flow channel 201 of the needle body 2. The medicine flowing from the syringe body 3 to the inside of the needle body 2 first passes through the intermediate channels 103 and then flows through the first flow channel 201.
[0034] This injection loss reduction filler plug, through the cooperation of the main body 101 and the boss 102, can fully fill the gap between the needle body 2 and the syringe body 3, allowing the medication to be fully discharged and reducing medication residue. Because of the filler plug, the contact area and sealing pressure between the needle body 2 and the syringe body 3 are increased, reducing medication waste caused by the gap and minimizing the possibility of medication loss through the gap. The overall structure of this injection loss reduction filler plug is simple and easy to assemble; it only needs to be installed between the needle body 2 and the syringe body 3. It enables convenient and rapid medication flow and injection, avoiding medication waste, and allows for control of the injection dosage, ensuring that the expected dose is achieved with each injection, thereby improving the therapeutic effect.
[0035] Preferably, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown in the embodiment, the needle body 2 has a first cavity 202 and a second cavity 203 that are interconnected. The second cavity 203 is used to accommodate the end of the syringe body 3. The first cavity 202 is located away from the end of the syringe body 3. The main body 101 abuts against the side wall of the second cavity 203, and the boss portion 102 is accommodated in the first cavity 202. The first cavity 202 and the second cavity 203 can correspond to the main body 101 and the boss portion 102, respectively. The shape and size of the main body 101 and the shape and size of the boss portion 102 can correspond to the shape and size of the first cavity 202 and the second cavity 203, respectively. No particular limitation is made here, and reasonable matching can be made according to the specifications of the needle body 2.
[0036] Preferably, such as Figure 5 and Figure 6 As shown, in this embodiment, the intermediate channel 103, the first flow channel 201 of the needle body 2, and the second flow channel 301 of the syringe body 3 are arranged coaxially. To facilitate the flow of the medication, these three flow channels are arranged coaxially, allowing the medication to pass through them quickly.
[0037] Preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, both the boss portion 102 and the main body portion 101 are formed into cylindrical structures. The cylindrical structure can adapt to most needle bodies 2, meet filling requirements, and achieve an interference fit between the boss portion 102 and the main body portion 101 and the needle body 2, avoiding gaps.
[0038] Preferably, such as Figure 1 and Figure 2As shown, in this embodiment, the diameter of the boss 102 is 2-3 mm, and the height is 1-1.5 mm. To accommodate microneedle injectors, both the diameter and height of the boss 102 are relatively small. Furthermore, the height here can be understood as... Figure 2 The length from right to left in the text.
[0039] Preferably, the filler for reducing injection loss can be made of plastic or metal. Plastic materials can be, for example, silicone or a terpolymer of acrylonitrile, butadiene, and styrene, while metal materials can be, for example, stainless steel or aluminum alloy.
[0040] The process of using the filler plug to reduce injection loss is as follows: the protrusion 102 of the filler plug is brought close to the needle body 2, and the main body 101 is brought close to the syringe body 3. At the same time, the filler plug is placed into the cavity inside the needle body 2, the syringe body 3 is installed on the needle body 2, and the needle body 2 is rotated to complete the engagement of the needle body 2 and the syringe body 3.
[0041] This injection loss reduction filler plug, through the cooperation of its main body and protrusion, can fully fill the gap between the needle body and the syringe body, allowing the medication to be fully discharged and reducing medication residue. The filler plug increases the contact area and sealing pressure between the needle body and the syringe body, reducing medication waste caused by gaps and minimizing the possibility of medication loss through these gaps. The filler plug has a simple overall structure and is easy to assemble; it only needs to be installed between the needle body and the syringe body. This allows for convenient and rapid medication flow and injection, avoiding waste, and also allows for control of the injection dosage, ensuring that each injection achieves the expected dose, thereby improving treatment efficacy.
[0042] like Figures 3 to 6 As shown, according to a second aspect of the present invention, a syringe is provided, the syringe including a filling plug for reducing injection loss as described above. This syringe can effectively reduce the loss of medication during use.
[0043] Preferably, such as Figures 3 to 6 As shown, in an embodiment, the syringe may include a needle head and a syringe barrel, with the aforementioned filler plug for reducing injection loss disposed between the needle head and the syringe barrel.
[0044] Preferably, in one possible embodiment, the syringe portion may include a syringe body 3 and a filler plug for reducing injection loss. The filler plug for reducing injection loss is disposed at the end of the syringe body 3, and the filler plug for reducing injection loss and the syringe body 3 can be integrally formed, that is, the filler plug for reducing injection loss can be understood as a protruding end of the syringe body 3. This arrangement can prevent the filler plug for reducing injection loss from being lost, and at the same time, can ensure that the filler plug for reducing injection loss is properly assembled with the needle body 2 during assembly. Furthermore, the size of the main body portion 101 is smaller than the size of the end of the syringe body 3, which facilitates assembly and docking.
[0045] Preferably, in another possible embodiment, the needle tip may include a needle body 2 and a filler plug for reducing injection loss, the filler plug being disposed inside the needle body 2. The needle body 2 and the filler plug for reducing injection loss can be an integrally formed structure. This arrangement can prevent the filler plug for reducing injection loss from being lost, and at the same time, ensure that the filler plug for reducing injection loss is properly assembled with the syringe body 3 during assembly.
[0046] Preferably, in another possible embodiment, the injection loss reducing filler plug can be disposed inside the needle body 2. When the injection loss reducing filler plug is disposed inside the needle body 2, the end of the syringe barrel abuts against the main body 101. In this embodiment, the injection loss reducing filler plug, the needle body 2, and the syringe barrel 3 can each be three components, which are assembled separately.
[0047] This syringe can effectively reduce the loss of medication and avoid waste. At the same time, it can control the injection dosage, ensuring that the expected dose is achieved with each injection, thereby improving the treatment effect.
[0048] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.
Claims
1. A fill stop for reducing injection loss, for use in a syringe, the syringe comprising a needle body and a barrel body, characterized by, The filler plug for reducing injection loss includes a main body and a boss portion. The boss portion is disposed at one end of the main body and protrudes from one end of the main body toward the needle body. The size of the main body is larger than the size of the boss portion. The outer wall of both the main body and the outer wall of the boss portion abut against the inner wall of the needle body. Both the main body and the boss portion have a middle channel, which communicates with the first flow channel of the needle body.
2. The loss reducing filler plug of claim 1, wherein The needle body has a first cavity and a second cavity that are connected to each other. The second cavity is used to accommodate the end of the syringe body. The first cavity is away from the end of the syringe body. The main body abuts against the side wall of the second cavity. The boss is accommodated in the first cavity.
3. The loss reducing filler plug of claim 1, wherein, The intermediate channel, the first flow channel of the needle body, and the second flow channel of the syringe body are arranged coaxially.
4. The loss reducing filler plug of claim 1, wherein Both the boss portion and the main body portion are formed into cylindrical structures.
5. The filler plug for reducing injection loss according to claim 4, characterized in that, The diameter of the boss is 2-3 mm and the height is 1-1.5 mm.
6. A syringe characterized by, The syringe includes a filler plug for reducing injection loss as described in any one of claims 1 to 5.
7. The syringe of claim 6, wherein, The syringe includes a needle head and a syringe barrel, and the filler plug for reducing injection loss is disposed between the needle head and the syringe barrel.
8. The syringe of claim 7, wherein, The syringe portion includes the syringe body and the filler plug for reducing injection loss. The filler plug for reducing injection loss is disposed at the end of the syringe body, and the size of the main body portion is smaller than the size of the end of the syringe body.
9. The syringe of claim 7, wherein, The needle tip includes the needle body and the filler plug for reducing injection loss, wherein the filler plug for reducing injection loss is disposed inside the needle body.
10. The syringe of claim 7, wherein, The filler plug for reducing injection loss can be disposed inside the needle body, and when the filler plug for reducing injection loss is disposed inside the needle body, the end of the syringe portion abuts against the main body portion.