TWM491743U - Wood screw - Google Patents

Description

Wood screw

This creation is about a type of screw, more specifically about a wood screw.

Referring to FIG. 61, a conventional wood screw 900 includes a screw head 910 and a rod body 920. The screw head 910 is for engaging with a locking tool, and the rod body 920 is extended by the screw head 910 and has a parallel rod body portion 924 and a tapered portion 922 formed at the end of the parallel rod body portion 924. Further, a thread 930 is formed on the parallel shaft portion 924 and the tapered portion 922.

When the above-mentioned wood screw 900 is locked into the wooden block without pre-drilling, it is easy to gradually increase the friction between the screw 930 and the parallel rod portion 924 and the wooden block, and more and more force is required to lock in, and also It is prone to wood cracking.

In view of this, there is a need to propose a solution to solve the above problems.

The purpose of this creation is to provide a wood screw.

In order to achieve the above object, the wood screw of the present invention comprises: a screw head for contacting with a locking tool; a rod body extending from the screw head, the rod body having a parallel rod body portion formed thereon a tip portion of the parallel rod portion that is tapered and tapered, and a tip formed at an end of the tip portion; at least one first thread formed on the parallel rod portion; and a pattern formed adjacent to the tip An end of the parallel portion of the tapered portion or the tapered portion, and Does not extend to the tip.

According to the wood screw of this creation, it can be locked into the wood without pre-drilling, and can prevent the cracking of the wood and the breakage of the screw, and also reduce the screwing torque during the locking, so that the operator can hardly lock into the hard Inside the wood.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, the following detailed description will be made in conjunction with the accompanying drawings. In the description of the present invention, the same components are denoted by the same reference numerals and will be described above.

210‧‧‧ screw head

220‧‧‧ rod body

224‧‧‧Parallel body section

226‧‧‧ cutting-edge

230‧‧‧First thread

240‧‧‧second thread

250‧‧‧spirt part

260‧‧‧pattern

900‧‧‧ wood screws

910‧‧‧ screw head

920‧‧‧ rod body

922‧‧‧spirt part

924‧‧‧parallel body section

930‧‧‧ threaded teeth

D‧‧‧ maximum outer diameter of the pattern

D1‧‧‧Maximum outer diameter of the first thread

D2‧‧‧Maximum outer diameter of the second thread

d‧‧‧First thread bottom diameter

Figures 1 through 60 show the wood screws of the first to sixty embodiments of the present invention, respectively.

Figure 61 is a conventional wood screw.

Please refer to the figures 1 to 60, which respectively show the wood screws of the first to sixty embodiments of the present invention, and the same reference numerals denote the same elements. The wood screw of the present invention comprises a screw head 210 and a rod body 220. The screw head 210 is used to connect with the locking tool, and the rod body 220 is extended by the screw head 210. The shaft 220 has a parallel shaft portion 224, a tapered portion 250 formed at the end of the parallel shaft portion 224 and tapered, and a tip end 226 formed at the end of the tapered portion 250. At least one helical first thread 230 is formed on the parallel shaft portion 224 that is engageable with the wood to provide a tensile force that prevents extraction. The first thread 230 of the wood screw shown in Figures 16-20, 36-40 and 56-60 extends continuously to the tapered portion 250 and reaches the tip end 226. Except the first Wood screws shown in Figures 16-20, 36-40 and 56-60, the remaining wood screws further having at least one helical second thread 240 extending from the tip 226 and formed on the tapered portion 250, which is not Connected to the first thread 230. The second thread 240 has the functions of drawing, cutting wood fiber and reaming, which helps to reduce the screwing torque when the first thread 230 is locked into the wood, and prevents the wood from cracking. The wood screws shown in Figures 1-5, 21-25 and 41-45 contain only one second thread 240, and the wood screws shown in Figures 6-10, 26-30 and 46-50 contain Two second threads 240, and the wood screws shown in Figures 11-15, 31-35 and 51-55 comprise three second threads 240. In addition, all the wood screws of this creation also contain a pattern 260. The wood screws shown in Figures 1-20 have a pattern 260 formed at the end of the parallel shank portion 224 adjacent the tapered portion 250 and that does not extend to the tapered portion 250. The wood screws shown in Figs. 21-40 have a pattern 260 formed only on the tapered portion 250 and not extending to the tip end 226. The wood screws shown in Figures 41-60 have a pattern 260 formed adjacent the end of the parallel shaft portion 224 of the tapered portion 250 and extending continuously to the tapered portion 250 but not to the tip 226. The pattern 260 has the function of cutting wood fibers and reaming, and can assist the second thread 240 to ream and cut the wood fiber, and is beneficial for reducing the friction when the first thread 230 is locked into the wood, and preventing the wood from cracking.

According to the wood screw of the present invention, the pattern 260 may have different shapes, for example, a plurality of ribs, a rhombic mesh pattern or a plurality of irregular protrusions. The wood screws shown in Figures 1, 6, 11, 16, 21, 26, 31, 36, 41, 46, 51 and 56 have a pattern 260 consisting of a plurality of ribs, and the ribs are parallel On the axis of the parallel shaft portion 224. Wood screws shown in Figures 2, 7, 12, 17, 22, 27, 32, 37, 42, 47, 52, and 57, the pattern 260 is composed of a plurality of ribs, and the ribs of the ribs The direction of the direction is the same as the direction of the spiral of the first thread 230. The wood screws shown in Figures 3, 8, 13, 18, 23, 28, 33, 38, 43, 48, 53 and 58 have a pattern 260 consisting of a plurality of ribs, and the ribs of the ribs Directional system and first screw The spiral direction of the grain 230 is opposite. The wood screws shown in Figures 4, 9, 14, 19, 24, 29, 34, 39, 44, 49, 54 and 59 have a pattern 260 consisting of a diamond-shaped mesh pattern. The wood screws shown in Figures 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, and 60 have a pattern 260 consisting of a plurality of irregular protrusions. In addition, according to all the wood screws of the present invention, the maximum outer diameter D of the pattern 260 is greater than the bottom diameter d of the first thread 230, but smaller than the maximum outer diameter D1 of the first thread 230. For a wood screw having a second thread 240, the maximum outer diameter D2 of the second thread 240 is greater than the maximum outer diameter D of the pattern 260, but less than the maximum outer diameter D1 of the first thread 230. For the wood screws having the second threads 240 shown in Figures 1-15, 21-35, and 41-55, the lead angle of the second threads 240 is greater than the lead angle of the first threads 230. The lead angle described above refers to the complementary angle of the angle between the thread and the axis of the parallel shaft portion 224. That is, if the angle between the thread and the axis of the parallel rod portion 224 is θ, the lead angle of the thread is (90°-θ). Since the second thread 240 has a large lead angle, it is advantageous for drawing, cutting wood fibers and reaming.

According to the wood screw of this creation, it can be locked into the wood without pre-drilling, and can prevent the cracking of the wood and the breakage of the screw, and also reduce the screwing torque during the locking, so that the operator can hardly lock into the hard Inside the wood.

Although the present invention has been disclosed in the foregoing examples, it is not intended to limit the present invention, and any one of ordinary skill in the art to which the present invention pertains can be modified and modified without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this creation is subject to the definition of the scope of the patent application attached.

210‧‧‧ screw head

220‧‧‧ rod body

224‧‧‧Parallel body section

226‧‧‧ cutting-edge

230‧‧‧First thread

240‧‧‧second thread

250‧‧‧spirt part

260‧‧‧pattern

D‧‧‧ maximum outer diameter of the pattern

D1‧‧‧Maximum outer diameter of the first thread

D2‧‧‧Maximum outer diameter of the second thread

d‧‧‧First thread bottom diameter

Claims (11)

a wood screw comprising: a screw head for engaging with a locking tool; a rod body extending from the screw head, the rod body having a parallel rod body portion formed at an end of the parallel rod body portion and a tapered tapered portion, and a tip formed at an end of the tapered portion; at least one first thread formed on the parallel shaft portion; and a pattern formed on the parallel rod adjacent the tapered portion The end of the body portion or the tapered portion does not extend to the tip. The wood screw of claim 1, wherein the pattern extends continuously from the parallel shaft portion to the tapered portion. The wood screw of claim 1, wherein the first threading thread extends continuously to the tip end. The wood screw of claim 1, further comprising: at least one second thread formed on the tip portion and extending to the tip end. The wood screw of claim 4, wherein the lead angle of the second thread is greater than a lead angle of the first thread. A wood screw according to any one of claims 1 to 5, wherein the pattern is formed by a plurality of ribs, a diamond-shaped mesh pattern or a plurality of irregular protrusions. A wood screw according to any one of the preceding claims, wherein the pattern is formed by a plurality of ribs that are parallel to an axis of the parallel shaft portion. A wood screw according to any one of claims 1 to 5, wherein the pattern is formed by a plurality of ribs having a spiral direction that is the same as a spiral direction of the first thread. A wood screw according to any one of claims 1 to 5, wherein the pattern is formed by a plurality of ribs having a spiral direction opposite to a spiral direction of the first thread. A wood screw according to any one of the preceding claims, wherein the maximum outer diameter of the pattern is greater than a bottom diameter of the first thread and less than a maximum outer diameter of the first thread. The wood screw of claim 4, wherein the maximum outer diameter of the first thread is greater than the maximum outer diameter of the second thread, and the maximum outer diameter of the pattern is greater than the bottom of the first thread. The diameter is less than the maximum outer diameter of the second thread.