screw
A screw and nail body technology, which is applied in the field of hardware manufacturing, can solve the problems of insufficient fastening force and easy loosening of screws, and achieve the effect of large fastening force, good fastening force, and prevention of backlock loosening
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[0010] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:
[0011] Such as figure 1 Shown this screw, it comprises the nail body of the circular truncated shape that one end is big and the other end is small, and the radial circle of nail body is provided with thread segment 3, and the small end of nail body is provided with inclined pointed head 6-1, and the big of nail body The end is provided with a nail cover 1, and the nail body includes two or more nail body segments connected by mutually embedded spherical protrusions 4 and spherical recesses 5, the nail body segment has two segments, and the spherical protrusions 4 is installed on the nail body section 2 connected to the nail cover 1, and the spherical recess 5 is installed on the nail body section 6 with the pointed head 6-1. When the nail cover 1 rotates, the two nail body sections rotate spherically with each other, and the advancing directions ...
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