Puncture needle for teaching
A puncture needle and needle bar technology, which is applied in the field of medical teaching equipment, can solve problems such as inability to continue puncture, leakage, etc.
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[0010] The present invention will be further described below in conjunction with accompanying drawing.
[0011] Such as figure 1 and figure 2 Shown: the present invention comprises needle point 1, needle bar 3, needle handle 4 and straight tube 6, and needle point 1 is positioned at one end of needle bar 3, and the other end of needle bar 3 is connected to straight tube 6 through needle handle 4, and needle bar 3 is provided with An electric switch circuit composed of a spring bead switch 2, a power supply 7 and an analog indicator light 5 connected in series, the spring bead switch 2 is arranged on one side of the junction of the needle tip 1 and the needle bar 3;
[0012] The spring bead switch 2 is composed of a spring, a bead and a conductive metal sheet. One end of the spring is fixed on the inner side of the needle bar 3, and the other end is connected with a bead. There is a metal sheet between the bead and the spring. At the same time, on the electric switch circuit ...
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