TWM439727U - Self-drilling screw - Google Patents

Description

V. New description: [New technical field] This new type is related to a kind of screw, especially a kind of drilling screw. [Prior Art] Refer to Figure 1 for the new patent case of the Republic of China Announcement No. M41377, "Improvement of Anti-cracking Screws". The anti-cracking screw disclosed in the present invention comprises a screw head 11 , a straight rod body 12 extending outward from the screw head 11 , and a first rod located at an end portion of the screw shaft u adjacent to the screw head u. a segment 13 , a second thread segment 14 on the straight rod body 12 and continuing the first thread segment 13 — located at the end of the # body 12 and continuing the second thread segment μ

The three-threaded section 15 is a tail 16' which extends outwardly from the end of the distal end of the straight body 12 and has a tapered threaded section 17 at the end 16 of the screw. The first thread segment 13 includes four spaced apart threads 13 . The thread segment 14 includes a thread η, a thread 14 and a 蟫纣 13 1 of the first thread segment 13 and a screw &amp of the second thread segment 14 ; Μ 1 ancient τ π ' 咕 one thread M1 has a different spiral direction. The second thread segment 15 of the piano comprises three (5) and no P-rings, and the spiral direction of the reaming material (5) reaming thread 攒 螺纹 thread 151 is the same as the thread 141 of the _ _ Μ Μ 嫘 嫘 累 累 累 Π %direction. The drilling thread segment comprises two drilling threads (7), and the drilling thread 17 ^ wire is more rapid and labor-saving when the screw is screwed, and the effect of the anti-cracking screw and the smooth discharge of the wood chips. The above-mentioned crack preventing screw has only two drilling threads 171. However, the number of the text 171 is too small. When the screw is locked into the object to be locked, the accumulated scrap is still large and it is difficult to smoothly. It is still not enough for the student and the class to improve the smoothness of the screw lock. Therefore, in the M439/2/ [new content] ‘ the purpose of this new type is to provide the force and drill a smooth drilling screw. ‘, can improve the cutting energy. Therefore, the new drilling screw includes a screw tail. The screw body includes a _ screw body, a screw head, and a twisting thread. The screw head spiral ring is disposed on the rod body at the other end of the screw body: the end of the screw body, and the screw tail is provided with the tail body, and the four spiral rings are disposed on the cutting screw of the tail body; = - The tip of the opposite side of the rod, " The tail has a tapered extension to the tip. ~The cutting screw is made of the rod. The effect of the new type is that in addition to drilling the object, the machine is used to push the hole to be more detailed and easy to discharge. [Embodiment] Since the screw tail includes four cutting screws, the cutting force can be used to increase the cutting force, and the debris generated by the compound to be locked can be drilled smoothly and is not easily blocked.

Others, other features, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. Referring to FIG. 2', a preferred embodiment of the present type of drilled screw includes a screw body 2' and a screw head 3 and a screw tail 4 κ screw body 2 respectively disposed at opposite ends of the screw body 2, including a rod body. 21, and a spiral ring 22 is disposed on the shaft u. The screw tail 4 includes a tail body 4 extending outward from the rod body 21 and having a central cone shape, and a cutting screw provided by the four spiral rings on the tail body 41.

Claims (1)

M439727 No. 10I2G5495 special money, please add the manual replacement page, apply for reversal: ^^:1〇ί May 1st 1. A drilling screw comprising: a screw body comprising a rod body and at least a meshing thread of the spiral ring disposed on the rod body; a screw head disposed at one end of the screw body; and a screw a tail, β is placed at the other end of the screw body, and includes a tail body connected to the rod body and having a tapered shape, and four spiral loops are arranged on the cutting thread of the tail body, and the tail body has a The tips on the opposite side of the shaft and the cutting threads are tapered from the shaft to the tip. 2. The drilling screw according to the invention of claim i, wherein each cutting screw has a cutting heat toward the sharp point; a cutting surface of the π忑大知, and a cutting surface And facing away from the edge of the tip, the guiding surface of the tomb is extended along the intersection of the cutting surface and the chip surface and perpendicular to the reference surface of the tail surface, and the cutting surface is sandwiched by the reference surface The first angle 'the chip surface and the reference surface are sandwiched by a second angle, and the first lost angle is greater than the second lost angle. 3. The drilling screw of claim 2, wherein the cutting surface is curved. 4. The drilled screw of claim 3, wherein the first angle is in the range of 35 to 45 degrees and the second refresh angle is in the range of 15 to 25 degrees. 5. The drilled screw of claim 4, wherein the first angle is 40 degrees' and the second angle is 2 degrees. 9 M439727 M439727 Revision date: May 101 Supplementary to the patent application No. 101205495, revised map replacement page M439727 Patent No. 101205495 Supplementary, amended, no-lined instructions Replacement page Revision date: l〇J Called 5·Month Q-day Amendment 4, Designated representative map: (1) The designated representative figure in this case is: Figure (2) ). (2) The symbol of the symbol of this representative figure is simple: 2............ screw body 4 ........... screw tail 21 ........ ..rod 41..........tail 22 ..... meshing thread 411........tip 3......... ... screw head 42.......... cutting thread 2