Hexagonal irregularly-shaped hole screw

Abstract

The invention relates to a hexagonal irregularly-shaped hole screw, a screw head of which is provided with a top and an insertion part concavely arranged on the top, wherein the insertion part is provided with a concave bottom conical surface, arc grooves arranged at intervals outwards extend from the bottom conical surface, an arc inward convex end is formed between every two arc grooves, the top end of each arc groove extends clockwise and is crossed with the arc inward convex end at one side to set an extending groove communicated with each arc groove, when a screw driver is inserted into the insertion part to drive the hexagonal irregularly-shaped hole screw, the contact area and the meshing degree of the insertion and the screw driver are increased by utilizing the added extending grooves so as to increase the torque force transmitted to the screw when the screw driver rotates, therefore, the screw is stably and simply rapidly screwed into a workpiece to be locked and connected in a labor-saving method.

Description

【Technical field】 [0001] The invention relates to a screw, in particular to a special-shaped hexagonal special-shaped hole screw. 【Background technique】 [0002] Currently used to lock screws between various workpieces such as wood, boards, and metal plates, such as figure 1 For existing wood screws 1 commonly used on wood, figure 2 It is the existing mechanical screw 2 commonly used on metal plates, both of which include a screw head 11, 21 for screwdriver insertion and drive, and a screw rod 15, 25 that can be screwed in the workpiece, wherein the Screw heads 11, 21 all have hexagonal holes 13, 23 (commonly known as plum blossom holes in the industry). [0003] Please refer to image 3 , because the inner hexagon holes 13, 23 on the screw heads 11, 21 of the existing screws 1, 2 are existing standard specifications, but for a long time due to the metal flow limit and the oil coating, the molding has always been incomplete, so that the screw The screwdriver tends to sw...

AI Technical Summary

Problems solved by technology

[0003] Please refer to image 3 , because the inner hexagonal holes 13, 23 on the screw heads 11, 21 of the existing screws 1, 2 are existing standard specifications, but for a long time due to the metal flow limit and the oil coating, the molding has always been incomplete, so that the screw The screwdriver tends to swing relative to the inner hexagonal holes 13, 23, resulting in insufficient contact area between the screwdriver and the surrounding walls of the inner corner holes 13, 23, and it is impossible to effectively transfer the applied force of the applicator into driving screws 1, 2 screwed. Torque, excessively increasing the loss of torque transmission during the driving process, sometimes even causing the screwdriver head to jump off or the inner hexagon hole 13, 23 to lose pressure

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