一种切换机构及微量注射泵
By introducing a switching mechanism into the micro-injection pump, automatic syringe switching and continuous injection are achieved, solving the problem of manual intervention required in existing technologies and improving the safety and efficiency of treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG UNIV QILU HOSPITAL
- Filing Date
- 2026-06-12
- Publication Date
- 2026-07-17
AI Technical Summary
Existing dual-channel micro-infusion pumps cannot achieve automatic and continuous switching and injection of two medications, requiring frequent manual intervention by medical staff, which affects treatment effectiveness and operational efficiency.
A switching mechanism was designed, including a pusher, a power rod, an extension plate, a limiting component, and a stop bar. This mechanism enables automatic switching and continuous injection of the syringe through a mechanical structure, and is compatible with existing micro-injection pumps without requiring complex control system modifications.
It enables automatic and continuous injection of medication, reduces the frequency of manual operation, improves clinical operation efficiency and the continuity and accuracy of treatment, and simplifies the difficulty and cost of equipment modification.
Smart Images
Figure CN224506006U_ABST
Abstract
Claims
1. A switching mechanism comprising a push head (1) and a power lever (2) connected to the push head (1), characterized in that, The pusher (1) is slidably connected to an extension plate (3) that can move up and down; the extension plate (3) has two working states relative to the pusher (1): a reset state and an extension state. The pusher (1) is provided with a limiting member for positioning the extension plate (3). The limiting member includes a flip plate (5) that is rotatably connected to the pusher (1). The top of the flip plate (5) can engage with the side wall of the extension plate (3) to achieve the positioning and retention of the extension plate (3) in the reset state. It also includes a stop bar (4). When the control power rod (2) drives the push head (1) to move, the bottom end of the extension plate (3) can abut against the stop bar (4) and cause the flip plate (5) to rotate, so that the top end of the flip plate (5) is released from the snap-fit state with the extension plate (3). The extension plate (3) automatically slides down to the preset position under its own gravity and forms an extension state relative to the push head (1).
2. A switching mechanism according to claim 1, wherein The limiting component also includes a spring seat (8), which is fixedly connected to the side wall of the push head (1). The spring seat (8) is connected to the flip plate (5) by a compression spring (7). The compression spring (7) is located below the rotation fulcrum of the flip plate (5).
3. A switching mechanism according to claim 1, wherein The pusher (1) has protruding lugs extending from its sidewall, and a rotatable shaft (6) is provided between the lugs. The flip plate (5) is fixedly connected to the shaft (6).
4. A switching mechanism according to claim 1, wherein The side wall of the extension plate (3) is provided with a slot (31), and the top of the flip plate (5) can be engaged with the slot (31).
5. A switching mechanism according to claim 1, wherein The pusher (1) has a slot (102) for sliding assembly of the extension plate (3). The inner walls on both sides of the slot (102) have non-through guide grooves (101) extending downward from the top. Guide strips (32) are fixed on both sides of the extension plate (3). The guide strips (32) are adapted to the guide grooves (101) and can slide up and down along the extension direction of the guide grooves (101).
6. A switching mechanism according to claim 1, wherein The pusher (1) and the extension plate (3) are respectively provided with grooves (103) on the side opposite to the slot (102) for fitting and engaging with the end of the piston rod of the syringe (11).
7. A switching mechanism according to claim 1, wherein The baffle (4) has an L-shaped structure.
8. A micro-injection pump, comprising a pump body main machine (9), two injectors (11) arranged in up and down on the pump body main machine (9), the nipples of the injectors (11) are connected with infusion pipelines (13), the ends of the infusion pipelines (13) are communicated with venous indwelling needles (15); the pump body main machine (9) is provided with a propelling drive mechanism, characterized in that, The pump body (9) is further provided with a switching mechanism as described in any one of claims 1-7; wherein, one end of the baffle (4) is connected to the outer shell of the pump body (9); and one end of the power rod (2) is connected to one end of the push rod of the propulsion drive mechanism.
9. A syringe pump according to claim 8, wherein, The power rod (2) is integrally formed with the push rod.
10. A syringe pump according to claim 8, wherein, One end of the baffle (4) is connected to the outer shell of the pump body (9) by bolting, gluing or magnetic attraction.