Needleless injection device
By designing non-circular outer walls for the operating part and injection part housing of the needle-free injection device, the problem of slippage when the user's hand slips is solved, enabling smooth turning and aesthetically pleasing injection operations, thus improving the user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING QS MEDICAL TECH
- Filing Date
- 2025-01-17
- Publication Date
- 2026-05-26
Smart Images
Figure CN224269863U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical devices. More specifically, this utility model relates to a needle-free injection device. Background Technology
[0002] A known rotary aspiration needle-free injector generally comprises two parts capable of relative rotation and relative longitudinal movement. The relative movement between these two parts enables the injector to apply pressure, draw up medication, and inject. However, existing injectors often slip during rotation, especially when the user's hands are wet or slippery, making it difficult to twist the syringe properly and affecting injection.
[0003] Therefore, there is a need to provide a needle-free injection device to at least partially solve the above problems. Utility Model Content
[0004] This utility model provides a needle-free injection device, the needle-free injection device comprising:
[0005] An operating unit is disposed at the distal end of the needleless injection device and has an operating unit housing;
[0006] An injection unit is disposed at the proximal end of the needleless injection device and has an injection unit housing, and the injection unit is connected to the operating unit, wherein the proximal end of the injection unit has a first opening for installing a drug tube;
[0007] The operating part is configured to be rotatably mounted to the injection part, and to reciprocate relative to the injection part when the operating part rotates relative to the injection part.
[0008] Wherein, at least a portion of the outer wall of the operating part housing has a non-circular cross-section, and / or,
[0009] At least a portion of the outer wall of the injection unit housing has a non-circular cross-section.
[0010] Preferably, at least a portion of the outer wall of the operating part housing has a roughly triangular cross-section, and at least a portion of the outer wall of the injection part housing has a roughly triangular cross-section.
[0011] Preferably, the operating part housing has a first end and a second end disposed opposite to the first end in the axial direction of the operating part housing, the second end being provided with a second opening, and a portion of the injection part extending into the second opening.
[0012] Preferably, the first end has a non-circular outer contour, and the second end has a circular outer contour.
[0013] Preferably, the first end has a triangular outer contour.
[0014] Preferably, the cross-section of the outer wall of the operating part housing gradually changes from a triangle at the first end to a circle at the second end.
[0015] Preferably, the injection housing has a third end and a fourth end disposed opposite to the third end in the axial direction of the injection housing, and the first opening is disposed at the third end.
[0016] Preferably, the third end has a non-circular outer contour, and the fourth end has a circular outer contour.
[0017] Preferably, the third end has a triangular outer contour.
[0018] Preferably, the cross-section of the outer wall of the injection portion housing gradually changes from a triangle at the third end to a circle at the fourth end.
[0019] Preferably, the needle-free injection device further includes a cover for closing onto the proximal end of the injection portion, wherein when the cover is closed onto the injection portion, the cover surrounds the first opening.
[0020] Preferably, the cross-section of the outer wall of the cover is non-circular.
[0021] Preferably, the cross-section of the outer wall of the cover is triangular.
[0022] According to the needle-free injection device of this utility model, by setting at least a portion of the cross-section of the outer wall of the operating part housing to a non-circular shape, and by setting at least a portion of the cross-section of the outer wall of the injection part housing to a non-circular shape, slippage can be prevented when the user holds the operating part or injection part, thus preventing the user from properly rotating the operating part or injection part. The above solution has a simple structure, is easy to operate, and can improve 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 three-dimensional schematic diagram of a needle-free injection device according to a preferred embodiment of the present invention.
[0025] Figure 2 for Figure 1 Another three-dimensional schematic diagram of the needle-free injection device shown;
[0026] Figure 3 for Figure 1 A schematic diagram of the needleless injection device shown, viewed from the first end of the operating section;
[0027] Figure 4 for Figure 1 The diagram shows the needle-free injection device as viewed from the bottom of the cover. Detailed Implementation
[0028] The preferred embodiment of the needle-free injection device according to the present invention will now be described in detail with reference to the accompanying drawings. The following are merely preferred embodiments 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.
[0029] First, it should be noted that the directional and positional terms mentioned in this utility model should be understood as relative directions and relative positions. The directional and positional terms mentioned in this utility model can be understood with reference to the accompanying drawings.
[0030] This utility model provides a needle-free injection device 100. Figures 1-4 A preferred embodiment of the needle-free injection device 100 according to the present invention is shown. The needle-free injection device 100 of the present invention can cooperate with a drug delivery tube to draw the liquid to be injected into the injection chamber within the drug delivery tube and complete the injection. It should be noted that the terms "proximal" and "distal" mentioned herein are relative to the needle-free injection device 100 in its use state. When using the needle-free injection device 100 for injection, the end closer to the user's injection site is called the "proximal" end, and the end farther from the user's injection site is called the "distal" end.
[0031] like Figure 1 As shown, the needle-free injection device 100 generally includes an operating section 110 located at a distal end and an injection section 120 located at a proximal end. The injection section 120 and the operating section 110 are rotatably connected to each other. The proximal end of the injection section 120 has a first opening (not shown) for inserting a drug tube. An injection button 110a is provided at the distal end of the operating section 110. In actual use, drug aspiration or dispensing can be performed by rotating the operating section 110 relative to the injection section 120.
[0032] The following describes the usage process of the needle-free injection device 100.
[0033] When the needle-free injection device 100 is needed, the user can rotate the operating part 110 in one direction (e.g., clockwise). While rotating relative to the injection part 120, the operating part 110 moves closer to the injection part 120 along the longitudinal axis of the needle-free injection device 100. The internal spiral pressurization structure of the needle-free injection device 100 compresses the spring to accumulate energy for injection until the needle-free injection device 100 reaches the pressurization completion state. At this point, the injection button 110a will pop up. After pressurization of the needle-free injection device 100 is complete, the user can rotate the operating part 110 in the opposite direction (e.g., counterclockwise) to move it away from the injection part 120 along the longitudinal axis, drawing the medication into the drug tube. During the medication drawing process, excessive medication may be absorbed. If excess medication needs to be expelled, the operating part 110 can be rotated in a second direction to drain the excess. The user can repeat the above operations until the medication dose drawn by the needle-free injection device 100 reaches the expected dose. During the injection procedure, the user can press the injection button 110a to release the injection pressure accumulated during the pressurization process and complete the injection.
[0034] like Figure 1 and Figure 2 As shown, the operating part 110 has an operating part housing 111 disposed on its outer side, and the injection part 120 has an injection part housing 121 disposed on its outer side. To facilitate operations such as gripping or twisting of the operating part 110 and the injection part 120, at least a portion of the cross-section of the outer wall of the operating part housing 111 is set to a non-circular shape, and at least a portion of the cross-section of the outer wall of the injection part housing 121 is set to a non-circular shape. It is understood that those skilled in the art can choose, according to actual needs, to set one of the operating part housing 111 and the injection part housing 121 to have a non-circular cross-section of at least a portion of its outer wall, or to set both to have a non-circular cross-section of at least a portion of their outer walls.
[0035] The cross-sectional shape of this non-circular shape is preferably a triangular cross-section, such as... Figure 1 As shown, all three corners of the triangle are rounded. In other embodiments not shown, those skilled in the art can also set the cross-section to other non-circular shapes, such as square or elliptical, etc., according to actual needs.
[0036] like Figure 1 and Figure 3As shown, the operating part housing 111 has a first end 112 and a second end 113 disposed opposite to the first end 112 in the axial direction of the operating part housing 111. The second end 113 has a second opening 114, and a portion of the injection part 120 extends into the second opening 114. In a preferred embodiment, the first end 112 has a generally triangular outer contour, and the second end 113 has a circular outer contour. More preferably, the cross-section of the outer wall of the operating part housing 111 gradually changes from a triangle at the first end 112 to a circle at the second end 113. This design facilitates gripping, twisting, and other operations on the operating part 110 while making the outer surface of the needle-free injection device 100 smoother and more aesthetically pleasing. In other embodiments not shown, those skilled in the art can adjust the cross-sectional shape of the outer wall of the operating part housing 111 according to actual needs; for example, the second end 113 can also be configured to have a triangular outer contour. In this case, the outer wall of the operating part 110 presents a triangular prism shape.
[0037] Further reference Figure 1 and Figure 2 The injection housing 121 has a third end 123 and a fourth end 124 disposed opposite to the third end 123 in the axial direction of the injection housing 121. The fourth end 124 is close to the operating part 110, the third end 123 is away from the operating part 110, and a first opening is provided at the third end 123. In a preferred embodiment, the third end 123 has a generally triangular outer contour, and the fourth end 124 has a circular outer contour. More preferably, the cross-section of the outer wall of the injection housing 121 gradually changes from a triangle at the third end 123 to a circle at the fourth end 124. This design facilitates the holding, twisting, and other operations of the injection part 120 while making the outer surface of the needle-free injection device 100 smoother and more aesthetically pleasing. In other embodiments not shown, those skilled in the art can also adjust the cross-sectional shape of the outer wall of the injection housing 121 according to actual needs. For example, the fourth end 124 can also be set to have a triangular outer contour, in which case the outer wall of the injection part 120 presents a triangular prism shape.
[0038] like Figure 1 , Figure 2 and Figure 4As shown, the needle-free injection device 100 also includes a cover 130, which is used to close onto the injection section 120 at its proximal end (i.e., the third end 123). When the cover 130 is closed onto the injection section 120, it surrounds the first opening, thereby preventing dust, debris, etc., from entering the first opening. To facilitate operation of the cover 130, preferably, the cross-section of the outer wall of the cover 130 is also set to a non-circular shape, which can be triangular or other shapes such as ellipse, square, etc.
[0039] According to the needle-free injection device 100 of this utility model, by setting at least a portion of the cross-section of the outer wall of the operating part housing 111 and at least a portion of the cross-section of the outer wall of the injection part housing 121 to a triangle, it is possible to prevent the user from slipping when holding the operating part 110 or the injection part 120, thus preventing the user from properly rotating the operating part 110 or the injection part 120. Furthermore, by also setting the cross-section of the outer wall of the cover 130 to a triangle, it is also easier for the user to operate the cover 130. The above solution has a simple structure, is easy to operate, and can improve the user's injection experience.
[0040] 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.
[0041] The protrusions, grooves, inserts, and snaps 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 needle-free injection device can make some structural adjustments accordingly.
[0042] 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 needle-free injection device (100), characterized in that, The needle-free injection device (100) includes: An operating unit (110) is disposed at the distal end of the needleless injection device (100) and has an operating unit housing (111); An injection unit (120) is disposed at the proximal end of the needleless injection device (100) and has an injection unit housing (121), and the injection unit (120) is connected to the operation unit (110), and the proximal end of the injection unit (120) has a first opening for installing a drug tube; The operating part (110) is configured to be rotatably mounted to the injection part (120), and to reciprocate relative to the injection part (120) when the operating part (110) rotates relative to the injection part (120). Wherein, at least a portion of the outer wall of the operating part housing (111) has a non-circular cross-section, and / or, At least a portion of the cross-section of the outer side wall of the injection section housing (121) is non-circular.
2. The needle-free injection device (100) according to claim 1, characterized in that, At least a portion of the outer wall of the operating part housing (111) has a roughly triangular cross-section, and at least a portion of the outer wall of the injection part housing (121) has a roughly triangular cross-section.
3. The needle-free injection device (100) according to claim 1, characterized in that, The operating part housing (111) has a first end (112) and a second end (113) disposed opposite to the first end (112) in the axial direction of the operating part housing (111). The second end (113) is provided with a second opening (114), and a portion of the injection part (120) extends into the second opening (114).
4. The needle-free injection device (100) according to claim 3, characterized in that, The first end (112) has a non-circular outer contour, and the second end (113) has a circular outer contour.
5. The needle-free injection device (100) according to claim 4, characterized in that, The first end (112) has a triangular outer contour.
6. The needle-free injection device (100) according to claim 5, characterized in that, The cross-section of the outer wall of the operating part housing (111) gradually changes from a triangle at the first end (112) to a circle at the second end (113).
7. The needle-free injection device (100) according to claim 1, characterized in that, The injection housing (121) has a third end (123) and a fourth end (124) disposed opposite to the third end (123) in the axial direction of the injection housing (121), and the first opening is disposed at the third end (123).
8. The needle-free injection device (100) according to claim 7, characterized in that, The third end (123) has a non-circular outer contour, and the fourth end (124) has a circular outer contour.
9. The needle-free injection device (100) according to claim 8, characterized in that, The third end (123) has a triangular outer contour.
10. The needle-free injection device (100) according to claim 9, characterized in that, The cross-section of the outer wall of the injection unit housing (121) gradually changes from a triangle at the third end (123) to a circle at the fourth end (124).
11. The needle-free injection device (100) according to claim 1, characterized in that, The needle-free injection device (100) further includes a cover (130) for covering the injection part (120) at its proximal end. When the cover (130) is covered by the injection part (120), the cover (130) surrounds the first opening.
12. The needle-free injection device (100) according to claim 11, characterized in that, The cross-section of the outer wall of the cover (130) is non-circular.
13. The needle-free injection device (100) according to claim 12, characterized in that, The outer wall of the cover (130) has a triangular cross-section.