Cap for needleless injection device and needleless injection assembly

Abstract

The utility model provides a cap for needleless injection equipment and a needleless injection component, the needleless injection equipment comprises an injector main body and an injection head, and the injection head is constructed to be capable of being installed on the injector main body for medicine suction and injection. The cap has a proximal end and a distal end, wherein the cap includes a body member and a pressing member. The main body piece is arranged at the far end of the cap and can be arranged on the syringe main body in a sleeving mode. The pressing piece is arranged at the near end of the cap and connected to the main body piece, the pressing piece comprises a sleeving part and a peripheral part arranged on the periphery of the sleeving part, the sleeving part is constructed to be capable of sleeving the injection head, an annular groove part is formed between the peripheral part and the sleeving part, and the peripheral part and the sleeving part are connected together through the groove part; an opening of the groove portion faces the proximal end of the cap. According to the scheme, the skin around the injection part can be automatically pinched up by the groove part when the needleless injection equipment performs injection operation, so that the stability during injection is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and more particularly to the field of needle-free injection. More specifically, this utility model relates to a cap and a needle-free injection assembly for a needle-free injection device. Background Technology

[0002] Needle-free injectors are a new type of injector that eliminates the need for a needle, thus avoiding needle irritation to the user's skin. When using existing needle-free injectors, users often struggle to maintain the correct angle between the injector and the injection site (e.g., the abdomen), and sometimes they also have difficulty controlling the pressure applied to the injection site, affecting injection comfort and user experience.

[0003] Therefore, there is a need to provide a cap and a needle-free injection assembly for a needle-free injection device to at least partially solve the above-mentioned problems. Utility Model Content

[0004] According to a first aspect of the present invention, a cap for a needle-free injection device is provided, the needle-free injection device comprising a syringe body and an injection head, the injection head being configured to be mounted on the syringe body for drug aspiration and injection, the cap having a proximal end and a distal end, wherein the cap comprises:

[0005] A main body component, disposed at the distal end of the cap and configured to be fitted onto the syringe body; and

[0006] A pressing member is disposed near the proximal end of the cap and connected to the main body. The pressing member includes a sleeve portion and a peripheral portion disposed on the outer periphery of the sleeve portion. The sleeve portion is configured to be sleeved on the injection head. An annular groove portion is formed between the peripheral portion and the sleeve portion, and the groove portion connects the peripheral portion and the sleeve portion together. The opening of the groove portion faces the proximal end of the cap.

[0007] Preferably, the interior of the main body is in communication with the interior of the sleeve portion.

[0008] Preferably, the peripheral portion extends radially outward relative to the body and toward the proximal end of the cap.

[0009] Preferably, the projection of the sleeve portion on a horizontal plane perpendicular to the axial central axis of the cap is radially inner to the projection of the main body on the horizontal plane, and the projection of the peripheral portion on the horizontal plane is radially outer to the projection of the main body on the horizontal plane.

[0010] Preferably, the outer surface of the main body is provided with a marking portion for marking the pressing depth and / or pressing angle of the needleless injection device on the injection site.

[0011] Preferably, the marking portion is constructed as a recess extending in the circumferential direction of the main body.

[0012] Preferably, the end of the main body away from the pressing member is provided with a first insert and a second insert extending in the axial direction of the cap. The first insert and the second insert are respectively connected to opposite sides of the main body about the axial central axis of the main body. The first insert and the second insert are configured to engage with the syringe body.

[0013] Preferably, the cross-section of the main body is generally square or circular.

[0014] Preferably, the inner periphery of the main body has a shape adapted to the shell of the syringe body.

[0015] Preferably, the cap is a one-piece molded component.

[0016] Preferably, the cap is a flexible component.

[0017] According to a second aspect of the present invention, a needle-free injection assembly is also provided, comprising:

[0018] Needle-free injection device, the needle-free injection device comprising:

[0019] An injection head, wherein an injection cavity is provided inside the injection head and one end of the injection head is provided with an injection micro-orifice communicating with the injection cavity, the injection head further includes a piston; and

[0020] A syringe body, the syringe body including a housing and a plunger disposed within the housing, the plunger being movably disposed within the housing, a portion of an injection head being mountable on the syringe body, and the plunger being configured to engage with a piston to move the piston within the injection chamber; and

[0021] As described above, the main body of the cap is fitted onto the syringe body, the fitting portion is fitted onto the injection head, and when the fitting portion is fitted onto the injection head, a portion of the injection head, including the injection micro-orifice, is exposed.

[0022] Preferably, the end of the main body away from the pressing member is provided with a first insert and a second insert extending along the axial direction of the cap. The first insert and the second insert are respectively connected to opposite sides of the main body about the axial central axis of the main body. The housing is provided with a first recess and a second recess. The first recess and the second recess are respectively provided on opposite sides of the housing about the axial central axis of the needleless injection device. The first insert and the second insert are configured to engage in the first recess and the second recess respectively.

[0023] Preferably, the needle-free injection assembly further includes a cap configured to close onto the cap.

[0024] Preferably, a recessed portion is provided on the outer periphery of the peripheral portion, and a raised strip is provided on the inner periphery of the cover to cooperate with the recessed portion.

[0025] According to the present invention, a cap and a needle-free injection assembly for a needle-free injection device allow the user to press a groove at the proximal end of the cap onto their skin during injection. By expelling air from the groove, a vacuum is created inside, automatically lifting the skin around the injection site and causing a slight bulge. This design provides stable support to the needle-free injection device to a certain extent, improving stability during injection and facilitating user injection.

[0026] Furthermore, when the needle-free injection device is pressed onto the injection site, a marking section on the outer surface of the cap's main body allows the user to easily determine the pressing depth and angle. This design is simple in structure, easy to operate, and enhances the user's injection experience. Attached Figure Description

[0027] To better understand the above and other objects, features, advantages, and functions of this utility model, reference can be made to the preferred embodiments shown in the accompanying drawings. The same or similar reference numerals in the drawings refer to the same or similar parts. Those skilled in the art should understand that the drawings are intended to schematically illustrate the preferred embodiments of this utility model and do not limit the scope of this utility model in any way; the parts in the drawings are not drawn to scale.

[0028] Figure 1 This is a perspective view of a cap for a needle-free injection device according to a preferred embodiment of the present invention.

[0029] Figure 2 for Figure 1 Another three-dimensional illustration of the hat shown;

[0030] Figure 3 for Figure 1The longitudinal cross-sectional view of the cap shown;

[0031] Figure 4 This is a perspective view of a needle-free injection assembly according to a preferred embodiment of the present invention. Detailed Implementation

[0032] The cap and needle-free injection assembly including the cap, according to a preferred embodiment of the present invention, will now be described in detail with reference to the accompanying drawings. The following description is merely a preferred embodiment of the present invention; those skilled in the art can conceive of other ways to implement the present invention based on the preferred embodiments, and such other ways also fall within the scope of the present invention.

[0033] This invention provides a cap for a needle-free injection device and a needle-free injection assembly including the cap. First, it should be noted that the directional and positional terms mentioned in this invention should be understood as relative directions and relative positions. The directional and positional terms mentioned in this invention can be understood with reference to the accompanying drawings.

[0034] Figures 1-3 A cap 100 for a needle-free injection device according to a preferred embodiment of the present invention is shown. Figure 4 A preferred embodiment of the needle-free injection assembly 300 according to the present invention is shown. The cap 100 of the present invention can cooperate with a needle-free injection device 200 to form the needle-free injection assembly 300. When using the needle-free injection device 200 for injection, the cap 100 can be installed on the proximal end of the needle-free injection device 200 and abut against the injection site. The needle-free injection device 200 of the present invention can draw the liquid to be injected into the injection chamber within the injection head and complete the injection. The needle-free injection device 200 of the present invention can employ a needle-free injection method. It should be noted that the terms "proximal end" and "distal end" mentioned herein are relative to the needle-free injection device 200 in its use state. When using the needle-free injection device 200 for injection, the end closer to the user's injection site is the "proximal end," and the end farther from the user's injection site is the "distal end."

[0035] According to a preferred embodiment of the present invention, a needle-free injection device 200 generally includes a syringe body 210 and an injection head (not shown) that can be mounted to the syringe body 210. The injection head is generally cylindrical in shape and has an injection chamber inside. A micro-injection orifice communicating between the injection chamber and the outside is provided at the proximal end of the injection head. A piston is also provided in the injection head, which can move within the injection chamber. The syringe body 210 includes a housing 211 and a push rod disposed inside the housing 211, which can be pushed to move relative to the housing 211. A portion of the injection head can engage in the housing 211, and the push rod can engage with the piston. When an injection is desired, the injection head can be pressed against the injection site, such as the patient's skin. When the injection is triggered, the liquid medication in the injection chamber can be pushed by the piston to be injected into the patient's body through the micro-injection orifice.

[0036] The following text first refers to Figures 1-4 The cap 100 according to a preferred embodiment of the present invention will be described in detail.

[0037] like Figure 1 and Figure 2 As shown, the cap 100 mainly includes a main body 110 and a pressing member 120 disposed at the proximal end of the main body 110. The main body 110 is generally cylindrical and can be fitted onto the syringe body 210 (e.g., Figure 4 (As shown). The pressing member 120 is mainly used to press onto the injection site during injection in the needle-free injection device 200. It includes a sleeve portion 121 and a peripheral portion 122. The peripheral portion 122 is disposed around the sleeve portion 121 on its outer periphery. The interior of the sleeve portion 121 communicates with the interior of the main body 110. The sleeve portion 121 is used to fit over the injection head, and when the sleeve portion 121 is fitted over the injection head, the portion of the injection head including the injection micro-orifice is exposed. This solution, by fitting the sleeve portion 121 of the cap 100 onto the injection head, can effectively hide most of the injection head, thereby reducing the user's fear when facing injection and alleviating momentary psychological pressure.

[0038] like Figure 3 As shown, an annular groove 123 is formed between the peripheral portion 122 and the sleeve portion 121. The groove 123 connects the distal end of the peripheral portion 122 and the distal end of the sleeve portion 121 together, and the groove 123 is connected to the proximal end of the main body 110. The opening of the groove 123 faces the proximal end of the cap 100, that is, the groove 123 faces the injection site when the needle-free injection device 200 performs injection.

[0039] According to this design, during injection, the injection end of the needle-free injection device 200 is pressed onto the injection site (e.g., skin). Simultaneously, the groove 123 located near the proximal end of the cap 100 is also pressed onto the user's skin. By expelling air from the groove 123, a vacuum is created inside, automatically lifting and slightly bulging the skin around the injection site to fill the groove 123. This provides stable support for the needle-free injection device 200, improving stability during injection and facilitating user injection. This design is easy to operate and enhances the user's injection experience.

[0040] Preferably, the cap 100 can be made of a flexible material such as rubber. In other embodiments, the cap 100 can be made of a rigid material such as resin or plastic.

[0041] In a preferred embodiment, such as Figure 3 As shown, the peripheral portion 122 extends radially outward relative to the main body 110 and toward the proximal end of the cap 100, thereby giving the peripheral portion 122 a generally expanded shape. This design can increase the contact area between the cap 100 and the injection site during injection by the needle-free injection device 200, thereby further improving the stability during injection and also ensuring the vertical injection angle of the needle-free injection device 200.

[0042] Preferably, the projection of the sleeve portion 121 onto a horizontal plane perpendicular to the axial central axis of the cap 100 is radially inner to the projection of the main body 110 onto that horizontal plane, and the projection of the peripheral portion 122 onto that horizontal plane is radially outer to the projection of the main body 110 onto that horizontal plane. This design allows for a more compact structure of the cap 100 and increases the contact area between the cap 100 and the injection site.

[0043] Preferably, the outer surface of the main body 110 is further provided with a marking portion for the pressing depth and / or pressing angle of the marking cap 100 on the injection site. For example... Figures 1 to 3As shown, in a preferred embodiment, the marking portion is constructed as a recess 130 extending circumferentially along the main body 110. When the needle-free injection device 200 is pressed onto the injection site, such as the skin, a portion of the cap 100 also sinks into the skin. The user can understand the pressing depth and angle of the needle-free injection device 200 by observing the distance between the recess 130 and the skin. For example, when the recess 130 just touches the skin, the user can understand that the pressing depth of the needle-free injection device 200 is appropriate; when the entire circumference of the recess 130 just touches the skin and the distance between it and the skin is uniform, the user can understand that the pressing angle of the needle-free injection device 200 is appropriate; if the distance between the recess 130 and the skin is uneven (i.e., tilted), the user can understand that the pressing angle of the needle-free injection device 200 is inappropriate and can adjust the orientation of the needle-free injection device 200 accordingly. This scheme allows the user to control the pressing pressure and angle of the needle-free injection device 200, thereby improving the convenience and efficiency of injection.

[0044] In the illustrated embodiment, two recesses 130 are provided on the outer surface of the main body 110. It is understood that in other embodiments not shown, other numbers of recesses 130 may be provided on the outer surface of the main body 110, or the marking portion may be provided in other ways, such as printing marking lines or providing raised ridges on the outer surface of the main body 110.

[0045] In a preferred embodiment, the cap 100 can be integrally molded, for example, by injection molding.

[0046] like Figure 1 and Figure 2 as well as Figure 4 As shown, the end of the main body 110 away from the pressing member 120 is provided with a first insert 111 and a second insert 112 extending along the axial direction of the cap 100. The first insert 111 and the second insert 112 are respectively connected to both sides of the main body 110 and are symmetrically arranged with respect to the axial central axis of the main body 110. The first insert 111 and the second insert 112 can engage with the syringe body 210. Preferably, the housing 211 of the syringe body 210 is provided with a first recess and a second recess that are recessed relative to the housing 211. The first recess and the second recess are respectively provided on both sides of the housing 211 and are symmetrically arranged with respect to the axial central axis of the needleless injection device 200. The shapes of the first recess and the second recess are adapted to the shapes of the first insert 111 and the second insert 112, respectively. When the cap 100 is installed on the needleless injection device 200, the first insert 111 and the second insert 112 can engage in the first recess and the second recess, respectively, thereby improving the stability of the cap 100 on the needleless injection device 200.

[0047] To further improve the stability of the cap 100, preferably, the inner periphery of the main body 110 has a shape adapted to the shell 211 of the syringe body 210. In a preferred embodiment, the outer periphery of the shell 211 of the syringe body 210 has a generally square cross-section, and correspondingly, the cross-section of the main body 110 can also be generally square. In other embodiments not shown, the outer periphery of the shell 211 of the syringe body 210 can also be constructed in other shapes, for example, it can have a generally circular cross-section, and correspondingly, the cross-section of the main body 110 can also be generally circular. Those skilled in the art can make such configurations according to actual needs.

[0048] like Figure 4 As shown, this utility model also discloses a needleless injection assembly 300, which includes the aforementioned needleless injection device 200 and a cap 100 that can be installed on the needleless injection device 200. The specific structures of the needleless injection device 200 and the cap 100 have been described above, and for the sake of brevity, they will not be repeated here.

[0049] In a preferred embodiment, the needle-free injection assembly 300 further includes a cover 220, which can be closed onto the cap 100 when the needle-free injection device 200 is not in use, thereby protecting the injection head. Preferably, a recessed portion is provided on the outer periphery of the peripheral portion 122, and a raised rib is provided on the inner periphery of the cover. When the cover 220 is closed onto the cap 100, the raised rib can be embedded in the recessed portion, thereby increasing the stability of the connection between the cover 220 and the cap 100. It is understood that those skilled in the art can also provide the raised rib on the peripheral portion 122 and the recessed portion on the inner periphery of the cover 200 according to actual needs.

[0050] It should be noted that this article uses injectable pharmaceuticals, liquids, and other pharmaceutical substances as examples to describe the concept of this disclosure, but this is merely an example and is not restrictive. The injectable substance can be of various other types, such as saline solution, glucose, etc. As long as it can be injected into the human body by the needle-free injector of this disclosure, it falls within the protection scope of this disclosure.

[0051] The protrusions, grooves, inserts, and snaps in the various mating structure groups provided in this embodiment can be structures that extend in the circumferential direction and are intermittently arranged, or structures that are continuously arranged in the circumferential direction. The needleless injection assembly can make some structural adjustments accordingly.

[0052] The above description of various embodiments of this utility model is provided for descriptive purposes to a person skilled in the art. It is not intended to exclude or limit the utility model to a single disclosed embodiment. As taught above, those skilled in the art will understand that various alternatives and variations of this utility model are possible. Therefore, although some alternative embodiments have been specifically described, those skilled in the art will understand or relatively easily develop other embodiments. This utility model is intended to include all alternatives, modifications, and variations of the utility model described herein, as well as other embodiments falling within the spirit and scope of the utility model described above.

Claims

1. A cap (100) for a needle-free injection device (200), the needle-free injection device (200) comprising a syringe body (210) and an injection head, the injection head being configured to be mounted on the syringe body (210) for drug aspiration and injection, characterized in that, The cap (100) has a proximal end and a distal end, wherein the cap (100) comprises: A main body (110) disposed at the distal end of the cap (100) and configured to fit over the syringe body (210); and A pressing member (120) is disposed at the proximal end of the cap (100) and connected to the main body (110). The pressing member (120) includes a sleeve portion (121) and a peripheral portion (122) disposed on the outer periphery of the sleeve portion (121). The sleeve portion (121) is configured to be sleeved on the injection head. An annular groove portion (123) is formed between the peripheral portion (122) and the sleeve portion (121). The groove portion (123) connects the peripheral portion (122) and the sleeve portion (121) together. The opening of the groove portion (123) faces the proximal end of the cap (100).

2. The cap (100) according to claim 1, characterized in that, The interior of the main body (110) is connected to the interior of the sleeve (121).

3. The cap (100) according to claim 1, characterized in that, The peripheral portion (122) extends radially outward relative to the main body (110) and toward the proximal end of the cap (100).

4. The cap (100) according to claim 3, characterized in that, The projection of the sleeve portion (121) on a horizontal plane perpendicular to the axial central axis of the cap (100) is radially inner to the projection of the main body (110) on the horizontal plane, and the projection of the peripheral portion (122) on the horizontal plane is radially outer to the projection of the main body (110) on the horizontal plane.

5. The cap (100) according to claim 1, characterized in that, The outer surface of the main body (110) is provided with a marking portion for marking the pressing depth and / or pressing angle of the needleless injection device (200) on the injection site.

6. The cap (100) according to claim 5, characterized in that, The marking portion is constructed as a recess (130) extending in the circumferential direction of the main body (110).

7. The cap (100) according to claim 1, characterized in that, The main body (110) is provided with a first insert (111) and a second insert (112) extending in the axial direction of the cap (100) at one end away from the pressing member (120). The first insert (111) and the second insert (112) are respectively connected to opposite sides of the main body (110) about the axial central axis of the main body (110). The first insert (111) and the second insert (112) are configured to engage with the syringe body (210).

8. The cap (100) according to claim 1, characterized in that, The cross-section of the main body (110) is generally square or circular.

9. The cap (100) according to claim 7, characterized in that, The inner periphery of the main body (110) has a shape adapted to the shell of the syringe body (210).

10. The cap (100) according to any one of claims 1-9, characterized in that, The cap (100) is a one-piece molded component.

11. The cap (100) according to any one of claims 1-9, characterized in that, The cap (100) is a flexible component.

12. A needle-free injection assembly (300), characterized in that, include: A needle-free injection device (200), the needle-free injection device (200) comprising: An injection head, wherein an injection cavity is provided inside the injection head and one end of the injection head is provided with an injection micro-orifice communicating with the injection cavity, the injection head further includes a piston; and The syringe body (210) includes a housing (211) and a push rod disposed within the housing (211). The push rod is movably disposed within the housing (211). A portion of the injection head can be mounted on the syringe body (210), and the push rod is configured to engage with the piston to drive the piston to move within the injection chamber. as well as The cap (100) as described in any one of claims 1-11, wherein the main body (110) of the cap (100) is fitted onto the syringe body (210), the fitting portion (121) is fitted onto the injection head, and when the fitting portion (121) is fitted onto the injection head, a portion of the injection head including the injection micro-orifice is exposed.

13. The needle-free injection assembly (300) according to claim 12, characterized in that, The main body (110) is provided with a first insert (111) and a second insert (112) extending along the axial direction of the cap (100) at one end away from the pressing member (120). The first insert (111) and the second insert (112) are respectively connected to opposite sides of the main body (110) about the axial central axis of the main body (110). The housing (211) is provided with a first recess and a second recess. The first recess and the second recess are respectively provided on opposite sides of the housing (211) about the axial central axis of the needleless injection device (200). The first insert (111) and the second insert (112) are configured to engage in the first recess and the second recess respectively.

14. The needle-free injection assembly (300) according to claim 12, characterized in that, The needle-free injection assembly also includes a cap (220) configured to close onto the cap (100).

15. The needle-free injection assembly (300) according to claim 14, characterized in that, A recessed portion is provided on the outer periphery of the peripheral portion (122), and a raised strip that mates with the recessed portion is provided on the inner periphery of the cover.

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