Needle knife with semicircular blade
A needle-knife and half-circle technology, applied in the field of medical devices, can solve the problem of large incision surface, achieve the effects of reducing the incision area, reducing pain, and facilitating operation
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Embodiment 1
[0032] Embodiment one: if figure 1 , Figure 7 and Figure 8As shown, a needle knife with a semicircular edge includes a handle part 1 and a needle knife part 2. The needle knife part 2 is composed of a needle body 201, a connecting part 202 and a blade 203. The cutting edge of the blade 203 is a semicircular structure, and the opening of the blade 203 The front angle is 15°-20°. Each cross section of the blade 203 is a closed surface surrounded by two symmetrically arranged arcs. The diameter of the arc in the closed surface gradually increases from bottom to top. The closed surface of the bottom end is infinitely approaching and dot-shaped, and the closed surface of the top end of the blade 203 is infinitely close to an elliptical shape. Connection, each cross-section of the connecting part 202 is an elliptical structure, the long axis 204 of the connecting part 202 is always equal to the diameter of the needle body 201, the short axis 205 of the connecting part 202 gradua...
Embodiment 2
[0035] Embodiment two: if figure 2 , image 3 and Figure 4 As shown, it includes a handle part 1 and a needle knife part 2. The structure of the needle knife part 2 in this embodiment is the same as that of the needle knife part 2 in Embodiment 1, and will not be repeated. The handle part 1 of this embodiment includes a first rod body 101 and the second rod body 102, the upper part of the first rod body 101 is a cylindrical structure, the lower part of the first rod body 101 is an inverted cone structure, and a circular accommodation cavity 103 is opened in the first rod body 101, and the vertical sliding in the accommodation cavity 103 Connected with a circular sliding block 104, the lower end of the first rod body 101 is vertically provided with a pinhole, the pinhole communicates the accommodating cavity 103 with the outside world, the diameter of the pinhole is equal to the diameter of the needle body 201, and the upper end of the needle body 201 passes through The pin...
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