Needle-free injector body and needle-free injector

Abstract

The utility model relates to a needleless injector main part and needleless injector, wherein, the needleless injector main part includes first component and second component, first component has the first circumferential side wall that extends along the axial direction, this first circumferential side wall is provided with internal thread on the inside, and second component has the second circumferential side wall that extends along the axial direction, this second circumferential side wall is provided with external thread on the outside, wherein, internal thread is matched with external thread, so that the relative motion between first component and second component can occur, and the inside of second component is arranged with the container of accommodating the injection material to be injected, wherein, second component is provided with the opening on the second circumferential side wall, the opening is at least partially aligned with the container and is covered by at least partially transparent window, the window is installed on second component, so that the window moves with second component. The needleless injector includes injection head and the needleless injector main part.

Description

Technical Field

[0001] This utility model relates to a medical device for injecting liquid medicines. More specifically, this utility model relates to a needleless injector body and a needleless injector having the needleless injector body. Background Technology

[0002] A needle-free injector is a medical device that injects liquid medication into a patient's body through a micro-orifice at its tip by applying high pressure. Because needle-free injectors do not have a needle, they eliminate the pain of needle pricks, effectively improving patient compliance.

[0003] Needle-free injectors typically include those with an external vial and those with an internal vial. When the vial is internal, because the injector casing is opaque, the operator cannot immediately know the condition of the vial inside, such as whether it is intact or the remaining amount of the medication.

[0004] However, constructing the housing of a needle-free injector as a transparent shell may excessively reveal the internal structure of the injector, which is neither aesthetically pleasing nor practical for the operator.

[0005] In addition, manufacturing a transparent and robust casing requires higher manufacturing costs.

[0006] Therefore, there is a need to provide a needle-free injector body and a needle-free injector to at least partially solve the above problems. Utility Model Content

[0007] To overcome the above defects, this utility model proposes a needleless injector body with a simple, sturdy and transparent window structure, so that the internal container, especially the medicine bottle, can be seen through the window to know its status, especially the remaining amount of the injectable substance in the container.

[0008] According to one aspect of the present invention, the needleless injector body includes a first component and a second component. The first component has a first circumferential sidewall extending in an axial direction, the first circumferential sidewall having an internal thread on its inner side. The second component has a second circumferential sidewall extending in the axial direction, the second circumferential sidewall having an external thread on its outer side. The internal thread engages with the external thread, allowing relative movement between the first component and the second component. The second component has a container for receiving an injectable substance disposed inside it. The second component has an opening on its second circumferential sidewall, the opening being at least partially aligned with the container and covered by a window that is at least partially transparent. The window is mounted on the second component, allowing it to move together with the second component.

[0009] Thus, the operator can see the container inside the second component through the opening and at least partially transparent window. Typically, this container has a transparent body, allowing the operator to see the remaining amount of the substance to be injected inside through the transparent portion of the body.

[0010] In a preferred embodiment, the needleless injector body further includes a first end cap, which is fitted onto the second component from the front end of the second component and has a cutout portion corresponding to the opening, wherein the first end cap fixes the viewing window to the second component by means of the cutout portion.

[0011] The needleless injector body constructed in this way has a particularly simple structure for its second component, window, and first end cap, which can be constructed separately, which is particularly advantageous for molding.

[0012] Preferably, the viewing window is sandwiched between the cutout portion of the first end cover and the periphery of the opening of the second component. More preferably, the cutout portion of the first end cover has a stepped portion on its inner side and / or the periphery of the opening of the second component has a stepped portion on its outer side, and the viewing window has a flange that is complementary to the stepped portion. Thus, the viewing window can be securely positioned between the first end cover and the second component.

[0013] Preferably, the interior of the first end cover is provided with an axially extending first protruding rib, and the outer surface of the second circumferential sidewall of the second member is provided with a first groove that extends axially rearward from the front end of the second member and is complementary to the first protruding rib. The first protruding rib and the first groove cooperate to prevent the first end cover from rotating relative to the second member in the circumferential direction. More preferably, the first protruding rib is centered in the circumferential direction relative to the hollow portion, and the first groove is centered in the circumferential direction relative to the opening, and the first groove extends to the stepped portion, so that the first groove can abut against the viewing window. More preferably, both the first protruding rib and the first groove have a zigzag-shaped corner to more effectively prevent rotation between the first end cover and the second member.

[0014] Preferably, the first end cap and the second component are connected by interference fit, snap-fit, welding or bonding.

[0015] Preferably, the first end cap is constructed to be opaque.

[0016] In another preferred embodiment, the needleless injector body further includes a second end cap, the window being integrally constructed with the second end cap, the second end cap being fitted onto the second component from the front end of the second component, such that the window is aligned with the opening.

[0017] Preferably, the interior of the second end cover is provided with an axially extending first protruding rib, and the outer surface of the second circumferential sidewall of the second member is provided with a first groove that extends axially rearward from the front end side of the second member and is complementary to the first protruding rib. The first protruding rib and the first groove cooperate to prevent the second end cover from rotating relative to the second member in the circumferential direction. More preferably, both the first protruding rib and the first groove have a zigzag corner to more effectively prevent rotation between the second end cover and the second member.

[0018] The needleless injector body constructed in this way allows the window and second end cap to be constructed as a single unit, thereby reducing the number of parts and thus reducing the workload of assembly.

[0019] Preferably, the second component has circumferentially surrounding second grooves at the front and rear ends of the opening, and the second end cover has circumferentially surrounding second ribs at the front and rear ends inside the end cover. The second ribs engage with the second grooves to achieve a snap-fit ​​connection between the second end cover and the second component. This allows for a particularly easy and reliable snap-fit ​​connection between the second end cover and the second component. More preferably, both the second ribs and the second grooves have arc-shaped top surfaces, allowing the second end cover to slide easily axially on the second component.

[0020] Preferably, the second end cap is configured to be transparent in the region of the viewport and opaque in the region outside the viewport.

[0021] Preferably, the second end cover is constructed in a frosted manner or coated with a coating in the non-viewing window area.

[0022] In another preferred embodiment, the window is directly connected to the second component by means of snap-fit, welding, or adhesive. This eliminates the need for an end cover, thereby reducing component costs.

[0023] Preferably, the window has a substantially flat base, a transparent portion located at the rear end of the base, and snap-fit ​​portions located on both sides of the base, wherein when the window is mounted on the second member via the snap-fit ​​portions, the transparent portion is aligned with the opening of the second member.

[0024] Preferably, the base is a non-transparent base.

[0025] Preferably, the opening is oblong or rectangular, wherein the dimension of the opening along the axial direction of the needle-free injector body is larger than the dimension along the circumferential direction of the needle-free injector body. This allows for maximum utilization of the space on the second component, providing a wider field of view to inspect the container's condition, particularly the remaining amount of the injectable material.

[0026] Preferably, the second component has two or four openings evenly arranged circumferentially on the second component. Two or four openings evenly arranged circumferentially form symmetrical openings, thereby allowing for better light penetration and a clearer view of the container's condition.

[0027] Preferably, the container has a transparent portion that allows a view of the container's interior, and the opening completely covers the transparent portion of the container in the axial direction. Alternatively, the opening covers at least 50% of the transparent portion of the container in the axial direction. When the opening completely covers the transparent portion of the container, the remaining amount of the substance to be injected inside the container can be clearly seen. When the opening covers at least 50% of the transparent portion of the container in the axial direction, the required space for arranging the second component is reduced, while the condition of the container, particularly whether the container is damaged, can still be effectively observed.

[0028] Preferably, the container has a transparent portion that allows a view of the container's interior, and the opening is positioned near one end of the transparent portion. This allows for easy viewing of the remaining amount of the injectable material within the container, particularly enabling the operator to estimate whether the remaining amount is sufficient for a single injection.

[0029] According to another aspect of this invention, a needle-free injector is also provided, which has an injection head and the aforementioned needle-free injector body. This needle-free injector therefore possesses the aforementioned advantages. Attached Figure Description

[0030] 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 reference numerals in the drawings refer to the same 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.

[0031] Figure 1 A longitudinal cross-sectional view of a first embodiment of the needleless injector according to the present invention is shown;

[0032] Figure 2 It shows Figure 1 A partially exploded view of the main body of the needleless injector in the image.

[0033] Figure 3 A longitudinal cross-sectional view of a second embodiment of the needleless injector according to the present invention is shown;

[0034] Figure 4 It shows Figure 3 A partially exploded view of the main body of the needleless injector in the image.

[0035] Figure 5 It shows Figure 3 The internal structure of the second end cap;

[0036] Figure 6 A longitudinal cross-sectional view of a third embodiment of the needleless injector according to the present invention is shown; and

[0037] Figure 7 It shows Figure 6 An exploded view of the main body of the needleless injector. Detailed Implementation

[0038] Referring now to the accompanying drawings, the specific embodiments of this utility model will be described in detail using a rotary aspiration needleless injector as an example. The description herein is merely a preferred embodiment of this utility model. Those skilled in the art can conceive of other ways to implement this utility model based on the preferred embodiments, such as implementing this utility model on a translational aspiration needleless injector; these other ways also fall within the scope of this utility model.

[0039] The "axial direction" mentioned in this article can be understood as the direction of the axis A1 of the needle-free injector. In this axial direction, the direction towards the patient's drug delivery site when using the needle-free injector is called "front," and the opposite direction is called "back." The "radial direction" mentioned in this article refers to the radial direction relative to the aforementioned axial direction. In the radial direction, the direction towards axis A1 is called "inner," and the opposite direction is called "outer."

[0040] Figure 1 A longitudinal cross-sectional view of a first embodiment of a needleless injector according to the present invention is shown, wherein the needleless injector includes an injection head 2 located at the front end and a needleless injector body 3 located at the rear end.

[0041] The injection head 2 includes an injection tube 21 and a piston rod 22 disposed within the injection tube 21. The injection tube 21 has a chamber with an opening at its rear end, and an injection micro-hole 211 is formed at its front end, communicating between the chamber and the outside. The rear end of the piston rod 22 has a needle-like portion 23, and a passage 222 is formed in the piston rod 22, which extends from the needle-like portion 23 into the chamber of the injection tube 21.

[0042] The needle-free injector body 3 includes a first component 31 and a second component 32. The first component 31 is generally cylindrical and has a first circumferential sidewall with an internal thread 313 on its inner side. The second component 32 is generally cylindrical and has a second circumferential sidewall, wherein the first circumferential sidewall of the first component 31 at least partially surrounds the second circumferential sidewall at the rear end of the second component 32. The second circumferential sidewall has an external thread 323 on its outer side. The internal thread 313 engages with the external thread 323, allowing relative movement between the first component 31 and the second component 32. That is, the first component 31 can be translated relative to the second component 32 by rotating the first component 31 relative to the second component 32.

[0043] The container 1 is placed inside and at the front end of the second component 32. The injectable material inside the container 1 is connected to the chamber of the injection tube 21 through the passage 222 of the needle-piercing part 23 and the piston rod 22. During drug aspiration, by rotating the first component 31 of the needleless injector body 3 relative to the second component 32, the piston rod 22 is moved backward, thereby creating a vacuum in the injection tube 21 and thus drawing the injectable material from the container 1.

[0044] Container 1 can be configured to be removable from the second component 32, or it can be configured to be a non-removable part of the second component 32. Container 1 is a cartridge bottle with a transparent body of body, the length of which is L1 of the transparent portion (i.e., the portion from which the injectable substance is visible from the outside).

[0045] In order to display the remaining amount of the substance to be injected in container 1 to the operator, the second component 32 has an opening 324 at the front end and on the second circumferential side wall, which is covered by a transparent window 35.

[0046] The needle-free injector body also includes a first end cap 36, which is fitted onto the second component 32 from the front end of the second component 32 and has a cutout portion 364 corresponding to the opening 324. The first end cap 36 uses the cutout portion 364 to fix a viewing window 35 to the second component 32. Specifically, the viewing window 35 is sandwiched between the cutout portion 364 of the first end cap 36 and the periphery of the opening 324 of the second component 32. The first end cap 36 can be detachably fixed to the second component 32 by interference fit, snap-fit, or other means, or it can be non-detachably fixed to the second component 32 by welding, bonding, or other means.

[0047] Furthermore, the opening 324 has a dimension of L2 along the axial direction A1 of the needle-free injector body 3. In this embodiment, L2 is slightly larger than L1, and the opening 324 substantially completely (i.e., 100%) covers the transparent portion of the container 1 in the axial direction A1. Therefore, the operator can easily see the remaining amount of the injectable material in the container 1 through the viewing window 35, the opening 324, and the transparent portion of the container 1. Preferably, the opening 324 covers at least 50% of the transparent portion of the container 1 in the axial direction A1.

[0048] The following is combined with Figure 2 The specific structures of the opening 324, the window 35, and the first end cover 36 in the first embodiment are described in further detail.

[0049] Figure 2 It shows Figure 1 The exploded view of the needleless injector body 3 of the needleless injector body 3 shows that the first end cap 36 of the needleless injector body 3 is translated forward along the axial direction A1 and the viewing window 35 is translated outward along the radial direction.

[0050] pass Figure 2 As can be seen, the second component 32 has four openings 324 evenly arranged in the circumferential direction, each opening 324 having a corresponding viewing window 35, and the first end cap 36 also has four hollow portions 364 for fixing the corresponding viewing windows 35. The openings 324 are elongated oval in shape, but they can also be rectangular. In particular, the dimension of the openings 324 along the axial direction of the needleless injector body 3 is larger than the dimension along the circumferential direction of the needleless injector body.

[0051] The viewing window 35 has a body 351 with a curvature consistent with the outer surface of the second circumferential sidewall of the second member 32, and the thickness of the body 351 is substantially uniform. A flange 352 is provided on the outer periphery of the body 351. A stepped portion 3242 is provided on the outer side of the periphery of the opening 324, the depth of which is consistent with the thickness of the flange 352, thus their shapes are complementary. Alternatively, the aforementioned stepped portion may be provided on the inner side of the hollow portion 364 of the first end cover 36.

[0052] The interior of the first end cover 36 is provided with four first ribs 366 extending axially. The outer surface of the second circumferential sidewall of the second member 32 is provided with four first grooves 326 that extend axially rearward from the front end of the second member 32 and are complementary to the first grooves 326. These first grooves 326 extend axially from the front end of the second member 32 to the step portion 3242 of the corresponding opening 324. Both the first ribs 366 and the first grooves 326 have zigzag-shaped corners. When the first end cover 36 is fitted onto the second member 32, the first ribs 366 slide axially into the first grooves 326 until they abut against the viewing window 35. Thus, the first ribs 366 can prevent the first end cover and the second member from rotating relative to each other in the circumferential direction, and can also position the viewing window 35 in the axial direction. Preferably, the first ribs 366 are centered in the circumferential direction relative to the corresponding cutout portion 364, and the first grooves 326 are also centered in the circumferential direction relative to the corresponding opening 324.

[0053] Figure 3 A longitudinal cross-sectional view of a second embodiment of the needleless injector according to the present invention is shown.

[0054] Unlike the first embodiment, the needle-free injector body includes a second end cap 37, and a viewing window 35 is constructed on the second end cap 37, that is, the viewing window 35 and the second end cap 37 are integrally constructed. This reduces the number of parts in the needle-free injector body and simplifies installation. The second end cap 37 is fitted onto the second member 32 from the front end of the second member 32, and the viewing window 35, more specifically the transparent portion 356, is aligned with the opening 324 of the second member 32.

[0055] Furthermore, in this embodiment, the axial dimension L2 of the opening 324 is smaller than the axial dimension L1 of the transparent portion of the container 1. The opening 324 covers approximately 80% of the transparent portion of the container 1 in the axial direction A1. In particular, the opening 324 covers the very front end of the transparent portion of the container 1, which helps to clearly see the remaining amount of the injectable material inside the container 1.

[0056] The following is combined with Figure 4 and Figure 5 The specific structure of the second component 32 and the second end cap 37 in the second embodiment will be described in further detail.

[0057] Figure 4 It shows Figure 3 The exploded view of the needleless injector body 3 of the needleless injector body 3 shows that the second end cap 37 of the needleless injector body 3 is translated forward along the axial direction A1. Figure 5 The internal structure of the second end cap 37 is shown.

[0058] from Figure 4 and Figure 5As can be seen from the first embodiment, the interior of the second end cover 37 also has an axially extending first rib 376 (see [reference]). Figure 5 The outer surface of the second circumferential sidewall of the second member 32 is provided with a first groove 326, which is complementary to the first rib 376 and extends axially rearward from the front end side of the second member 32. The first rib 376 engages with the first groove 326 to prevent the second end cover 37 from rotating circumferentially relative to the second member 32. Both the first rib 376 and the first groove 326 have zigzag-shaped corners, thereby more effectively preventing rotation between the second end cover 37 and the second member 32. Here, the first groove 326 does not extend to the opening 324.

[0059] In addition, second circumferentially surrounding grooves 327 and 328 are respectively provided at the front and rear ends of the opening 324, and second circumferentially surrounding ribs 377 and 378 are respectively provided at the front and rear ends of the second end cover 37 inside it (see Figure 5 The second ribs 377 and 378 respectively cooperate with the second grooves 327 and 328 to achieve the engagement of the second end cover 37 and the second member 32. Both the second rib and the second groove have arc-shaped top surfaces to allow axial sliding between the second end cover 37 and the second member 32.

[0060] Here, the second end cap 37 is preferably constructed to be transparent in the area of ​​the window 35 and opaque in the area outside the window 35, for example, constructed in a frosted manner or coated with a coating.

[0061] Figure 6 A longitudinal cross-sectional view of a third embodiment of the needleless injector according to the present invention is shown.

[0062] The main difference between the third and second embodiments is that the window 35 is directly mounted on the second component 32. In this embodiment, the window 35 and the second component 32 are connected by a snap-fit ​​mechanism. In other embodiments, the window 35 may be connected to the second component 32 by welding or adhesive.

[0063] Furthermore, in this embodiment, the axial dimension L2 of the opening 324 is smaller than the axial dimension L1 of the transparent portion of the container 1. The opening 324 covers approximately 50% of the transparent portion of the container 1 in the axial direction A1. In particular, the opening 324 is arranged near the rearmost end of the transparent portion of the container 1, which helps to clearly see the remaining amount of the injectable material inside the container 1 within a limited field of view.

[0064] The following is combined with Figure 7 The specific structure of the second component 32 and the window 35 in the third embodiment will be described in further detail.

[0065] Figure 7 It shows Figure 6 The exploded view of the needleless injector body 3 is shown in the figure, wherein the viewport 35 of the needleless injector body 3 is translated outward in the radial direction.

[0066] from Figure 7 As can be seen, the needle-free injector body 3 has two windows 35. The windows 35 form a cover for the second member 32, having a generally flat base 355, a transparent portion 356 at the rear end of the base 355, and four snap-fit ​​portions 357 on both sides of the front and rear ends of the base 355. When the windows 35 are mounted on the second member 32 via the snap-fit ​​portions 357, the transparent portion 356 aligns with the opening 324 of the second member 32. The transparent portion 356 can protrude into the opening 324 to close it. The base 355 can be constructed to be opaque, for example, frosted or coated.

[0067] Furthermore, the needle-free injector described herein can be used not only for injecting liquid medications but also for injecting other substances, such as saline solution and glucose. Therefore, using the needle-free injector described in this invention to inject other substances also falls within the scope of this invention.

[0068] The above description of various embodiments of this utility model is provided for the purpose of description to a person of ordinary skill in the art. It is not intended to exclude or limit the utility model to a single disclosed embodiment. As stated above, a person of ordinary skill in the art will understand that various alternatives and variations of this utility model exist. Therefore, although some alternative embodiments have been specifically described, a person of ordinary skill 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 needle-free injector body, the needle-free injector body comprising a first component and a second component, the first component having a first circumferential sidewall extending in an axial direction, the first circumferential sidewall having an internal thread on its inner side, and the second component having a second circumferential sidewall extending in the axial direction, the second circumferential sidewall having an external thread on its outer side, wherein, The internal thread engages with the external thread, allowing relative movement between the first component and the second component. The second component has a container for receiving the injection material inside. The second component has an opening on its second circumferential sidewall, the opening being at least partially aligned with the container and covered by a window that is at least partially transparent. The window is mounted on the second component such that it moves together with the second component.

2. The needleless injector body according to claim 1, characterized in that, The needleless injector body also includes a first end cover, which is fitted onto the second component from the front end of the second component and has a cutout portion corresponding to the opening, wherein the first end cover fixes the viewing window to the second component by means of the cutout portion.

3. The needleless injector body according to claim 2, characterized in that, The viewing window is sandwiched between the hollow portion of the first end cover and the periphery of the opening of the second component.

4. The needleless injector body according to claim 3, characterized in that, The first end cover has a stepped portion on the inner side of the hollow portion and / or the periphery of the opening of the second component on the outer side, and the window has a flange that is complementary to the stepped portion.

5. The needleless injector body according to claim 4, characterized in that, The first end cover has an axially extending first rib inside, and the outer surface of the second circumferential sidewall of the second member has a first groove that extends axially backward from the front end of the second member and is complementary to the first rib. The first rib and the first groove cooperate to prevent the first end cover from rotating relative to the second member in the circumferential direction.

6. The needleless injector body according to claim 5, characterized in that, The first rib is centered relative to the hollow portion in the circumferential direction, and the first groove is centered relative to the opening in the circumferential direction, and the first groove extends to the stepped portion.

7. The needleless injector body according to claim 5, characterized in that, Both the first rib and the first groove have zigzag-shaped corners.

8. The needleless injector body according to claim 2, characterized in that, The first end cap and the second component are connected by interference fit, snap-fit, welding or adhesive.

9. The needleless injector body according to claim 2, characterized in that, The first end cap is constructed to be opaque.

10. The needleless injector body according to claim 1, characterized in that, The needleless injector body also includes a second end cap, the window being integrally constructed with the second end cap, the second end cap being fitted onto the second component from the front end of the second component, such that the window is aligned with the opening.

11. The needleless injector body according to claim 10, characterized in that, The second end cover has an axially extending first rib inside, and the outer surface of the second circumferential sidewall of the second member has a first groove that extends axially backward from the front end of the second member and is complementary to the first rib. The first rib and the first groove cooperate to prevent the second end cover from rotating relative to the second member in the circumferential direction.

12. The needleless injector body according to claim 11, characterized in that, Both the first rib and the first groove have zigzag-shaped corners.

13. The needleless injector body according to claim 10, characterized in that, The second component is provided with a second groove that surrounds the front end and the rear end of the opening, and the second end cover is provided with a second rib that surrounds the front end and the rear end of the opening, respectively. The second ribs cooperate with the second groove to achieve the snap-fit ​​between the second end cover and the second component.

14. The needleless injector body according to claim 13, characterized in that, Both the second rib and the second groove have an arc-shaped top surface.

15. The needleless injector body according to claim 10, characterized in that, The second end cap is constructed to be transparent in the area of ​​the viewport and opaque in the area outside the viewport.

16. The needleless injector body according to claim 15, characterized in that, The second end cover is constructed in a frosted manner or coated with a coating in the non-viewing area.

17. The needleless injector body according to claim 1, characterized in that, The window is directly connected to the second component by means of snap-fit, welding or adhesive.

18. The needleless injector body according to claim 17, characterized in that, The window has a substantially flat base, a transparent portion located at the rear end of the base, and snap-fit ​​portions located on both sides of the base, wherein when the window is mounted on the second member via the snap-fit ​​portions, the transparent portion is aligned with the opening of the second member.

19. The needleless injector body according to claim 18, characterized in that, The base is a non-transparent base.

20. The needleless injector body according to claim 1, characterized in that, The opening is oblong or rectangular, wherein the dimension of the opening along the axial direction of the needleless injector body is greater than the dimension along the circumferential direction of the needleless injector body.

21. The needleless injector body according to claim 1, characterized in that, The second component has two or four openings, which are evenly arranged in the circumferential direction of the second component.

22. The needleless injector body according to claim 1, characterized in that, The container has a transparent portion that allows a view of the interior of the container, and the opening completely covers the transparent portion of the container in the axial direction.

23. The needleless injector body according to claim 1, characterized in that, The container has a transparent portion that allows a view of the interior of the container, and the opening covers at least 50% of the transparent portion of the container in the axial direction.

24. The needleless injector body according to claim 1, characterized in that, The container has a transparent portion that allows a view of the interior of the container, and the opening is positioned near one end of the transparent portion of the container.

25. A needle-free injector, characterized in that, The needleless injector includes an injection head and a needleless injector body according to any one of claims 1-24.

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