An automatic safety vacuum anti-acupuncture syringe and needle return method
A syringe and anti-needle stick technology, applied in the field of medical devices, can solve problems such as medical work injuries, and achieve the effects of solving injuries, cost economy, and improving self-destruction safety.
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Embodiment 1
[0037] Such as figure 1 As shown, the present invention provides an automatic safe vacuum anti-needle syringe, comprising a hollow syringe housing 2000, a core rod 1000 is installed inside the syringe housing 2000, and a fixed needle seat is installed at the end of the syringe housing 2000 7000, the fixed needle base 7000 is equipped with a retractable injection mechanism; the end of the core rod 1000 is equipped with a pull-back mechanism matched with the injection mechanism; the outer cover of the fixed needle base 7000 is provided with a needle shield 9000;
[0038] Specifically, such as figure 2 , 3 As shown, the inside of the core rod 1000 is a hollow cavity, and the pull-back mechanism is installed at the end of the hollow cavity to form a sealed vacuum-sealed cavity; the pull-back mechanism includes a pointed tip mounted on the end of the core rod 1000 The convex pullback device 3000 and the piston 4000 sleeved on the outer wall of the end of the core rod 1000; the ...
Embodiment 2
[0045] The present invention provides a method for returning the needle of an automatic safe vacuum anti-needlestick syringe based on the first embodiment, including:
[0046] 1), such as Figure 5 As shown, in the initial state, there is a gap between the pull-back mechanism and the injection mechanism;
[0047] Specifically, the pointed-convex locking device 3001 is not in contact with the bottom bracket hollow hanging back device 5001 .
[0048] 2), such as Figure 6 As shown, when the liquid medicine is sucked, the injection mechanism is fixed, the core rod 1000 is pulled, and the liquid medicine enters the syringe jacket 2000 under the action of the pressure difference;
[0049] Specifically, the ring-shaped piston 4000 is locked by the rings at the front and rear ends of the core rod 1000, and the piston 4000 will not move when the core rod 1000 pumps liquid. The pointed convex pull-back device 3000 is stuck by the step inside the core rod, and the position of the cor...
Embodiment 3
[0061] An automatic safe vacuum anti-needle-puncture syringe injection method, specifically comprising:
[0062] 1. Open the product package and remove the injection needle protective cap 9000.
[0063] 2. Insert the injection needle 8000 into the liquid medicine and suck it, and pull back the plunger 1000. Because of the initial stopper step 1004 of the plunger 1000 of the syringe, the plunger 4000 of the syringe cannot move. Because the syringe plunger 1000 clamps the sealing device 1002 , the liquid is sucked into the syringe jacket 2000 under negative pressure.
[0064] 3. Push the injection needle head 8000 upward to expel the air bubbles inside the syringe jacket 2000.
[0065] 4. Disinfect the injection site of the human body.
[0066] 5. Use the injection needle 8000 to pierce the injection site, and press the mandrel 1000 to inject.
[0067] 6. After the liquid medicine injection is completed, the pointed convex locking device 3001 on the pointed convex retracting ...
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