Auxiliary device for needleless injection equipment and needleless injection assembly

Abstract

The utility model provides an auxiliary device for needleless injection equipment and a needleless injection component, the needleless injection equipment comprises an injector main body and an injection head, and one end of the injection head is provided with an injection micropore. The assist device has a proximal end and a distal end, and includes an engagement portion and a body portion. The joint part is arranged at the far end of the auxiliary device and can be arranged on the injection head in a sleeving mode, the joint part comprises a joint element, and the joint element is used for tightly connecting the auxiliary device with the injection head. The main body part is arranged at the near end of the auxiliary device and connected to the joint part, a communicating part is arranged on the main body part, a through hole penetrating in the thickness direction of the communicating part is formed in the communicating part, the through hole can be communicated with the injection micropore, and the through hole has a preset depth in the thickness direction. According to the scheme, the auxiliary device is arranged, so that the injection micropore and the skin of the part to be injected can be spaced by a certain distance when the needleless injection equipment performs injection operation, and the injection effect can be 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 an auxiliary device 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 control the angle and pressure applied to the injection site, affecting the penetration of the medication into the skin. Incorrect pressure can negatively impact injection comfort and user experience.

[0003] Therefore, there is a need to provide an auxiliary device and a needle-free injection component 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, an auxiliary device 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, one end of the injection head being provided with an injection micro-orifice, the auxiliary device having a proximal end and a distal end, the auxiliary device comprising:

[0005] A coupling portion, disposed at the distal end of the auxiliary device and configured to be fitted onto the injection head, the coupling portion including a coupling element for tightly engaging the auxiliary device with the injection head; and

[0006] The main body is disposed at the proximal end of the auxiliary device and is connected to the joint. The main body is provided with a connecting portion and a through hole extending along its thickness direction is provided in the connecting portion. The through hole can communicate with the injection micropore and has a predetermined depth in the thickness direction.

[0007] Preferably, the main body has a first end facing the injection micropore and a second end opposite to the first end, the second end having an inwardly recessed portion relative to the peripheral portion of the second end.

[0008] Preferably, the connecting portion protrudes into the recessed portion and extends beyond the peripheral portion.

[0009] Preferably, the first end has a recess for receiving the head of the injection head, and the through hole is disposed in the recess.

[0010] Preferably, the projection of the through hole onto a plane perpendicular to the thickness direction covers the projection of the injection micropore onto the plane.

[0011] Preferably, the joint is constructed as a hollow cylindrical shape, and the joint element is disposed on the inner circumference of the joint, wherein the joint element is constructed as a threaded structure.

[0012] Preferably, the engaging element is configured as a plurality of snap-fit ​​structures protruding from the inner periphery of the engaging portion along the direction toward the axial center line of the engaging portion, the plurality of snap-fit ​​structures being arranged at uniform intervals along the inner periphery of the engaging portion; or the engaging element is configured as a continuous ring of snap-fit ​​structures protruding from the inner periphery of the engaging portion along the direction toward the axial center line of the engaging portion.

[0013] Preferably, the auxiliary device is a one-piece molded component, and / or the auxiliary device is a flexible component.

[0014] Preferably, the projected area of ​​the main body portion on a plane perpendicular to the thickness direction is greater than the projected area of ​​the joint portion on the plane.

[0015] According to a second aspect of the present invention, a needle-free injection assembly is also provided, comprising:

[0016] Needle-free injection device, the needle-free injection device comprising:

[0017] 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

[0018] 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

[0019] As described above, the auxiliary device has a connecting portion fitted onto the injection head, and the connecting portion is configured to separate the injection micro-orifice from the injection site by a predetermined distance.

[0020] Preferably, the joint is constructed as a hollow cylindrical shape, and the joint element is constructed as a plurality of snap-fit ​​structures protruding from the inner periphery of the joint along the direction toward the axial center line of the joint, or the joint element is constructed as a continuous ring of snap-fit ​​structures protruding from the inner periphery of the joint along the direction toward the axial center line of the joint, and the outer periphery of the injection head is provided with a groove that mates with the snap-fit ​​structures.

[0021] Preferably, the joint is constructed as a hollow cylindrical shape, the joint element is constructed as a threaded structure disposed on the inner circumference of the joint, and the outer circumference of the injection head is provided with an external thread that mates with the threaded structure.

[0022] According to the auxiliary device and needle-free injection assembly of this utility model for needle-free injection equipment, when performing injection operations using the needle-free injection equipment, the auxiliary device can be sleeved on the injection head, and the main body of the auxiliary device can be pressed onto the user's skin. The connecting part separates the injection micro-orifice from the user's skin by a certain distance, so that the injected liquid is injected into the user's skin through the through hole of the connecting part after being ejected from the injection micro-orifice. The above solution can also provide stable support for the needle-free injection equipment to a certain extent, improve the stability during injection, and at the same time, it can adjust the injection force of the liquid to ensure that the liquid is injected to a specified depth, thereby improving the user's injection experience. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a perspective view of a portion of a needleless injection assembly equipped with an auxiliary device according to a preferred embodiment of the present invention.

[0025] Figure 2 for Figure 1 A cross-sectional schematic diagram of the needle-free injection assembly shown;

[0026] Figure 3 This is a perspective view of an auxiliary device for a needle-free injection device according to a preferred embodiment of the present invention.

[0027] Figure 4 This is a perspective view of an auxiliary device for a needle-free injection device according to a preferred embodiment of the present invention, viewed from another angle.

[0028] Figure 5 This is a perspective view of an auxiliary device for a needle-free injection device according to a preferred embodiment of the present invention, viewed from another angle. Detailed Implementation

[0029] The auxiliary device according to a preferred embodiment of the present invention and the needle-free injection assembly including the auxiliary device will now be described in detail with reference to the accompanying drawings. The following are merely preferred embodiments according to 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.

[0030] This invention provides an auxiliary device for a needle-free injection device and a needle-free injection assembly including the auxiliary device. 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.

[0031] Figure 1 and Figure 2 A portion of a needle-free injection assembly 300 according to a preferred embodiment of the present invention is shown. Figures 3-5 An auxiliary device 100 for a needle-free injection device according to a preferred embodiment of the present invention is shown. The auxiliary device 100 of the present invention can cooperate with the needle-free injection device to form a needle-free injection assembly 300. When using the needle-free injection device for injection, the auxiliary device 100 can be installed at the proximal end of the needle-free injection device and rest against the injection site. The needle-free injection device 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 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 in its use state. When using the needle-free injection device 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."

[0032] A needle-free injection device according to a preferred embodiment of the present invention generally includes a syringe body (not shown) and an injection head 210 that can be mounted to the syringe body. The injection head 210 is generally cylindrical in shape and has an injection chamber inside. An injection micro-orifice 211 communicating between the injection chamber and the outside is provided at the proximal end of the injection head 210. A piston (not shown) is also provided in the injection head 210, and the piston is movable within the injection chamber. The syringe body generally includes a housing and a push rod disposed inside the housing, which can be pushed to move relative to the housing. A portion of the injection head 210 can be engaged in the housing, and the push rod can engage with the piston. When an injection operation is triggered, the liquid medication in the injection chamber can be pushed by the piston to be injected into the patient through the injection micro-orifice 211.

[0033] The following text is for reference only. Figures 1-5The auxiliary device 100 and the needleless injection assembly 300 including the auxiliary device according to the preferred embodiment of the present invention will be described in detail.

[0034] like Figure 1 and Figure 2 As shown, the auxiliary device 100 mainly includes a connecting portion 110 and a main body portion 120 disposed near the proximal end of the connecting portion 110. The connecting portion 110 is generally cylindrical and can be fitted onto the injection head 210. The main body portion 120 is connected to the connecting portion 110 and is mainly used to press onto the injection site during injection using a needle-free injection device. The main body portion 120 is provided with a communicating portion 121, in which a through hole 122 is provided, extending along its thickness direction. When the auxiliary device 100 is installed on the injection head 210, the through hole 122 communicates with the injection micro-hole 211, and the through hole 122 has a predetermined depth in the thickness direction. Preferably, the projection of the through hole 122 on a plane perpendicular to the thickness direction covers the projection of the injection micro-hole 211 on that plane; that is, in the installed state, the through hole 122 is directly opposite the injection micro-hole 211 and its cross-sectional diameter is larger than the diameter of the injection micro-hole 211.

[0035] Continue to refer to Figure 2 The main body 120 has a first end and a second end opposite to the first end. The first end faces the injection micro-hole 211, and the second end faces the injection site. The first end is provided with a recess 125 for accommodating the head of the injection head 210, which is provided with the injection micro-hole 211. A through hole 122 is provided in the recess 125 and communicates with the recess 125. The second end has a peripheral portion 123 extending circumferentially along the main body 120 and an inwardly recessed portion 124 relative to the peripheral portion 123.

[0036] According to this design, during injection, the main body 120 of the auxiliary device 100 can be pressed onto the injection site (e.g., skin). Simultaneously, the concave portion 124 at the second end of the main body 120 is also pressed onto the user's skin. By expelling the air from the concave portion 124, a vacuum can be created inside, automatically pinching up the skin around the injection site and slightly bulging it to fill the concave portion 124. This provides stable support for the needle-free injection device to a certain extent, improving stability during injection and facilitating user injection. Furthermore, the connecting portion 121 can separate the injection micro-orifice 211 from the user's skin by a certain distance, allowing the injected medication to be injected into the user's skin through the through-hole 122 of the connecting portion 121 after exiting the injection micro-orifice 211. This allows for adjustment of the injection force, enhancing the user's injection experience.

[0037] Preferably, such as Figure 2 and Figure 5As shown, the connecting portion 121 has a portion that protrudes into the recessed portion 124, and the protruding portion does not exceed the peripheral portion 123.

[0038] The auxiliary device 100 also includes a coupling element 130 disposed on the inner periphery of the coupling portion 110 for tightly connecting the auxiliary device 100 to the injection head 210.

[0039] In a preferred embodiment, such as Figure 2 and Figure 3 As shown, the engaging element 130 is configured as a plurality of snap-fit ​​structures protruding from the inner periphery of the engaging portion 110 along a direction toward the axial centerline of the engaging portion 110. The plurality of snap-fit ​​structures are evenly spaced along the inner periphery of the engaging portion 110, and can engage with a ring of grooves 212 disposed near the proximal end of the injection head 210. Exemplarily, the engaging element 130 may include two or three snap-fit ​​structures; those skilled in the art may also provide other numbers of snap-fit ​​structures as needed. In other embodiments not shown, the engaging element 130 may also be configured as a continuous ring of snap-fit ​​structures protruding from the inner periphery of the engaging portion 110 along a direction toward the axial centerline of the engaging portion 110. Those skilled in the art may configure it according to actual needs.

[0040] In other embodiments, the connecting element may also be constructed as a threaded structure, and correspondingly, the injection head may be provided with an external thread that mates with the threaded structure, so that the auxiliary device can be connected to the injection head by screwing.

[0041] In a preferred embodiment, the auxiliary device 100 is a flexible component that can be integrally molded, for example, by injection molding.

[0042] like Figure 2 and Figure 3 As shown, in a preferred embodiment, the projected area of ​​the main body 120 on a plane perpendicular to the thickness direction is greater than the projected area of ​​the joint 110 on the plane. This solution can increase the contact area between the auxiliary device 100 and the injection site during injection by the needle-free injection device, thereby further improving the stability during injection and ensuring the vertical injection angle of the needle-free injection device.

[0043] This utility model also discloses a needleless injection assembly 300, which includes the aforementioned needleless injection device and an auxiliary device 100 that can be installed on the needleless injection device. The specific structures of the needleless injection device and the auxiliary device 100 have been described above and will not be repeated here for the sake of brevity.

[0044] 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.

[0045] The protrusions, grooves, snaps, and other mating features in the various mating structure groups provided in this embodiment can be structures that extend and are intermittently arranged in the circumferential direction, or structures that are continuously arranged in the circumferential direction. The needleless injection assembly can make some structural adjustments accordingly.

[0046] 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. An auxiliary device (100) for a needle-free injection device, the needle-free injection device comprising a syringe body and an injection head (210), the injection head (210) being configured to be mounted on the syringe body for drug aspiration and injection, one end of the injection head (210) being provided with an injection micro-orifice (211), characterized in that, The auxiliary device (100) has a proximal end and a distal end, wherein the auxiliary device (100) includes: A coupling (110) disposed at the distal end of the auxiliary device and configured to be fitted onto the injection head (210), the coupling including a coupling element (130) for tightly engaging the auxiliary device with the injection head (210); and The main body (120) is disposed at the proximal end of the auxiliary device and is connected to the joint (110). The main body (120) is provided with a connecting part (121) and a through hole (122) extending along its thickness direction is provided in the connecting part (121). The through hole (122) can communicate with the injection micro-hole (211) and has a predetermined depth in the thickness direction.

2. The auxiliary device (100) according to claim 1, characterized in that, The main body (120) has a first end facing the injection micro-hole (211) and a second end opposite to the first end, the second end having an inwardly recessed portion (124) that is recessed inward relative to the peripheral portion (123) of the second end.

3. The auxiliary device (100) according to claim 2, characterized in that, The connecting portion (121) protrudes into the recessed portion (124) and extends beyond the peripheral portion (123).

4. The auxiliary device (100) according to claim 2, characterized in that, The first end has a recess (125) for receiving the head of the injection head (210), and the through hole (122) is provided in the recess (125).

5. The auxiliary device (100) according to claim 1, characterized in that, The projection of the through hole (122) onto a plane perpendicular to the thickness direction covers the projection of the injection microhole (211) onto that plane.

6. The auxiliary device (100) according to claim 1, characterized in that, The joint is constructed as a hollow cylindrical shape, and the joint element (130) is disposed on the inner circumference of the joint (110), and the joint element is constructed as a threaded structure.

7. The auxiliary device (100) according to claim 1, characterized in that, The joint is constructed as a hollow cylindrical shape, and the joint element (130) is constructed as a plurality of snap-fit ​​structures protruding from the inner periphery of the joint (110) along the direction toward the axial center line of the joint (110), the plurality of snap-fit ​​structures being arranged at uniform intervals along the inner periphery of the joint (110), or the joint element (130) is constructed as a continuous ring of snap-fit ​​structures protruding from the inner periphery of the joint (110) along the direction toward the axial center line of the joint (110).

8. The auxiliary device (100) according to claim 1, characterized in that, The auxiliary device (100) is an integrally formed part, and / or the auxiliary device (100) is a flexible part.

9. The auxiliary device (100) according to claim 1, characterized in that, The projected area of ​​the main body (120) on a plane perpendicular to the thickness direction is greater than the projected area of ​​the joint (110) on the plane.

10. A needle-free injection assembly (300), characterized in that, include: Needle-free injection device, the needle-free injection device comprising: An injection head (210) is provided, wherein an injection cavity is provided inside the injection head (210) and an injection micro-hole (211) communicating with the injection cavity is provided at one end of the injection head (210); the injection head (210) further includes a piston; and The syringe body includes a housing and a plunger disposed within the housing, the plunger being movably disposed within the housing, a portion of the injection head (210) being mountable on the syringe body, and the plunger being configured to engage with the piston to move the piston within the injection chamber; as well as The auxiliary device (100) as described in any one of claims 1-9, wherein the engagement portion (110) of the auxiliary device (100) is sleeved on the injection head (210), and the connecting portion (121) is configured to space the injection micro-orifice (211) from the injection site by a predetermined distance.

11. The needle-free injection assembly (300) according to claim 10, characterized in that, The joint is constructed as a hollow cylindrical shape, and the joint element (130) is constructed as a plurality of snap-fit ​​structures protruding from the inner periphery of the joint (110) along the direction toward the axial center line of the joint (110), or the joint element (130) is constructed as a continuous ring of snap-fit ​​structures protruding from the inner periphery of the joint (110) along the direction toward the axial center line of the joint (110), and the outer periphery of the injection head (210) is provided with a groove (212) that mates with the snap-fit ​​structure.

12. The needle-free injection assembly (300) according to claim 10, characterized in that, The joint is constructed as a hollow cylindrical shape, the joint element (130) is constructed as a threaded structure on the inner circumference of the joint (110), and the outer circumference of the injection head (210) is provided with an external thread that mates with the threaded structure.

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