一种过渡连接件、注射筒组件和注射笔
By designing the axial insertion and circumferential rotation connection of the transition connector, the problem of unstable connection between the transparent material of the injection pen needle and the overall shell was solved, achieving a stable connection between the injection cartridge shell and the injection pen body, facilitating the observation of the remaining injection volume, and improving assembly efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 杭州钱唐隆腾医疗技术有限公司
- Filing Date
- 2025-08-08
- Publication Date
- 2026-07-17
AI Technical Summary
The transparent material of the needle part of the existing injection pen is difficult to bond directly with the overall shell, making it difficult to observe the remaining amount of the injection, and the connection between the transparent material and the non-transparent material is unstable.
Design a transition connector, including a first connecting part and a second connecting part, to achieve a stable connection between the syringe shell and the injection pen holder through axial insertion and circumferential rotation, avoiding the need to create threads on the transparent syringe shell, and using elastic plastic material to ensure a stable connection.
A stable connection between the transparent syringe shell and the main body of the injection pen was achieved, making it easier to observe the remaining amount of the injection, reducing assembly difficulty and improving assembly efficiency.
Smart Images
Figure CN224506026U_ABST
Abstract
Claims
1. A transition coupling, comprising: It includes a first connecting part (110) for connecting a transparent syringe shell (200) and a second connecting part (120) for connecting an injection pen holder (300). The first connecting part (110) and the second connecting part (120) are fixedly connected axially. A set of grooves (130) that engage with the syringe shell are provided on the side wall of the first connecting part (110), and the grooves (130) are arranged circumferentially. The first connecting part (110) and the second connecting part (120) are connected to each other so that the piston rod (400) inside the injection pen holder can pass through. The syringe shell (200) is inserted axially into the first connecting part (110) and rotated circumferentially at a certain angle until the circumferential protrusion (210) on the syringe shell engages in the groove (130) to prevent the syringe shell (200) from moving circumferentially.
2. The transition coupling of claim 1, wherein, The first connecting part (110) includes a snap-fit member (111) and a stop member (112). The snap-fit member (111) is fixed axially at one end of the stop member (112), and the second connecting part (120) is fixed axially at the other end of the stop member (112). The radial dimension of the stop member (112) is larger than that of the second connecting part (120), and it is used to abut against the outer shell (500) of the injection pen holder.
3. The transition coupling of claim 2, wherein, The groove (130) extends axially from the end of the snap-fit member (111) to the end face of the stop member (112), and then extends circumferentially along the stop member (112) to a predetermined distance, so that the groove (130) is L-shaped as a whole.
4. The transition coupling of claim 3, wherein, Each of the grooves (130) has an axial protrusion (131) on its bottom wall. The axial protrusion (131) is arranged opposite to the top wall of the groove. The axial protrusion (131) has an arc transition surface. When the circumferential protrusion (210) on the syringe shell is engaged in the groove (130), the axial protrusion (131) abuts against the circumferential protrusion (210).
5. The transition coupling of any one of claims 1 to 4, wherein, The second connecting part (120) has a threaded hole along the axial direction for connecting the injection pen holder (300).
6. The transition coupling of any one of claims 1 to 4, wherein, The first connecting part (110) has an axial cavity (113) that can accommodate the end of the injection cylinder shell. The cavity (113) communicates with the second connecting part (120) and allows the piston rod (400) to pass through.
7. The transition coupling of any one of claims 2 to 4, wherein, The outer wall of the snap-fit (111) is threaded for connecting the covering layer (600) to achieve a gradual or transitional material change.
8. A syringe assembly characterized by, The device includes a transition connector (100) as described in any one of claims 1 to 6, a cartridge bottle (700), a coating layer (600), and a syringe housing (200), wherein the cartridge bottle (700) is placed inside the syringe housing (200), the first connecting portion (110) of the transition connector (100) is engaged with the syringe housing (200), and the coating layer (600) is detachably disposed on the outer periphery of the transition connector (100).
9. The syringe assembly of claim 8, wherein, The end side wall of the injection cylinder housing (200) is provided with a circumferential protrusion (210) that cooperates with the groove (130) of the transition connector.
10. An injection pen characterized in that An injection pen body structure comprising the syringe assembly of claim 8 or 9 threadably connected thereto.