Patent ID: 8181554

Claim:
An eyebrow embroidery machine, comprising: a connecting sleeve, having an internal screw thread formed inside an end of the connecting sleeve, and a protruding rib formed inside the connecting sleeve at a position proximate to the internal screw thread; an eyebrow embroidery bushing, having at least one circular flange formed at an external periphery of an end of the eyebrow embroidery bushing, and the eyebrow embroidery bushing being watertightly embedded into another end of the connecting sleeve at a position corresponding to the circular flange; an eyebrow embroidery needle module, having a core link rod installed at an end of the eyebrow embroidery needle module, an eyebrow embroidery needle installed at another end of the eyebrow embroidery needle module and wherein the eyebrow embroidery needle module includes a needle bushing having a substantially H-shaped axial cross-section, and the core link rod is installed at an end of the needle bushing, and the eyebrow embroidery needle is installed at another end of the needle bushing; an anti-backflow plastic cover, made of an elastic material, and having an end sheathed and fixed onto the periphery of the eyebrow embroidery needle module, and a flange at another end abutted against the protruding rib proximate to a side of the internal screw thread, such that the eyebrow embroidery needle module is installed in the connecting sleeve, and the eyebrow embroidery needle passes through the eyebrow embroidery bushing and extends to the outside from another end of the eyebrow embroidery bushing; a transmission mechanism, having a motor installed therein, and an external screw thread formed at an end outside the transmission mechanism and screwed and engaged with the internal screw thread of the connecting sleeve, and a transmission rod of the motor being coupled to the core link rod, such that the core link rod, the anti-backflow plastic cover and the eyebrow embroidery needle can be moved reciprocally along a central axis of the eyebrow embroidery machine; and at least one watertight O-ring installed to the flange at the another end of the anti-backflow plastic cover and proximate to the side of the internal screw thread, such that the watertight O-ring and the flange at the another end of the anti-backflow plastic cover are forcedly pressed between the protruding rib and the transmission mechanism to define a watertight status.