Press type central spindle of mobile phone for dental department

The invention relates to a press type central spindle of a mobile phone for the dental department. The central spindle comprises a shaft sleeve, a pressing part and a needle clamping part, wherein thepressing part and the needle clamping part are vertically arranged in the shaft sleeve; a needle clamping hole is formed in the needle clamping part, and two through slots are oppositely arranged onthe side wall of the top of the needle clamping part; a wedge-shaped structure is arranged at the bottom of the pressing part. The central spindle is characterized in that the pressing part adopts a columnar structure and comprises a first column body and a second column body which are connected up and down, and the radial size of the first column body is smaller than that of the second column body; two flat positions which are used for increasing the gap between the pressing part and the shaft sleeve and adopt a planar structure are oppositely arranged on the side wall of the first column body; a spiral groove is formed in the side wall of the second column body, and at least one circle of oil storage groove is also formed in the middle of the side wall of the second column. The press type central spindle has the benefits as follows: the needle clamping reliability is guaranteed by improving lubrication, so that accessories more smoothly move and do not easily get stuck in the needleclamping or loosening process.