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1. (WO2018088576) DEVICE FOR ADJUSTING DRILLING DEPTH OF DRILL

Pub. No.:    WO/2018/088576    International Application No.:    PCT/KR2016/012774
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Wed Nov 09 00:59:59 CET 2016
IPC: B23B 49/00
Applicants: HONG, Soo Hwan
홍수환
Inventors: HONG, Soo Hwan
홍수환
HONG, Jae Chol
홍재철
Title: DEVICE FOR ADJUSTING DRILLING DEPTH OF DRILL
Abstract:
When an operator holds a handle (153) of a rotary shaft (151) and turns the rotary shaft (151), a rotary adjusting screw (150) rotates, and at this time, since the threads (152) of the rotary adjusting screw (150) engages with the threads (123) of a rotating body (120), the rotating body (120) rotates along with the same. Then, according to the rotational direction of the rotating body (120), slide keys (170) slide along the slide grooves (112) and are pushed out to the outside or pushed inwards of the slide groove (112). Since the slide grooves (112) are formed at the tapered parts (111a), the slide keys are pushed outwards slantly in the clamping direction of a drill bit (10) when the slide keys (170) are pushed out to the outside of the slide groove (112). Therefore, according to the present invention, a device (100) for adjusting a drilling depth of a drill is clamped and fixed at a desired position of the drill bit (10) by the slide keys (170), wherein the drilling depth is determined according to the fixing of the device at a certain position of the drill bit (10).