1337228 六、發明說明： 【發明所屬之技術領域】 本發明是有關於一種螺絲設計，特別是指一種具有複 鑽尾之螺絲。 【先前技術】 參閱圖1，習知鑽尾螺絲丨包含有一螺頭u，一設於 該螺頭11上之桿體12，—形成於該桿體12末端之鑽尾部 13，以及複數環設於該桿體丨2上之螺牙丨4 ;其中，該鑽 尾部13上開設有二排屑溝131(圖中僅示一個），該每一排 屑溝131向外延伸形成有一切削面132，以使該切削面132 /、相鄰之排屑溝131相接形成有一切削刃13 3 ;當進行鎖 合作業時，藉由該切削刃133先行鑽鎖，再配合該螺牙段 14鎖合進入，即可達到鎖合及定位等功效。 惟，實際使用上，該習知鑽尾螺絲！僅可藉該鑽尾部 13上所形成之該排屑溝131與該切削刃133進行切削與排 屑而已，所以切削過程中所產生之切屑將受限而無法順利 排出，使得鎖合扭力增加，極易造成鎖合過程產生折斷情 事外，並且該鑽尾部13之成型長度完全考量應鎖合之2 件（圖中未示出）厚度，相對過長之該鑽尾部13長度，無 形之中增加成型模具損耗，造成製造成本增加。 …、 ^有鑒於此，乃有業者進一步研發出另一鑽尾螺絲2形 態；參閱圖2,習知螺絲2改良重點在於：該鑽尾部。與 、累牙#又2 4間形成有一頸部區2 5，且該頸部區？ q + Η 1 / 乙3之外徑 係小於該鑽尾部23之外徑d2 ;鎖合時，係.访麟 '、田鑽尾部 4 13372281337228 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a screw design, and more particularly to a screw having a re-drilling tail. [Prior Art] Referring to Fig. 1, a conventional tail screw 丨 includes a screw head u, a rod body 12 disposed on the screw head 11, a drill tail portion 13 formed at the end of the rod body 12, and a plurality of loops a threaded shank 4 on the shank 2; wherein the boring portion 13 is provided with two swarf grooves 131 (only one is shown), and each of the swarf grooves 131 extends outward to form a cutting surface 132. The cutting surface 132 /, the adjacent chip flutes 131 are connected to form a cutting edge 13 3; when the lock cooperation is performed, the cutting edge 133 is drilled first, and then the screw segment 14 is locked. When you enter, you can achieve the functions of locking and positioning. However, in actual use, the conventional drill-tail screw! Only the chip flute 131 formed on the drill tail portion 13 and the cutting edge 133 can be cut and chipped, so that the chips generated during the cutting process are limited and cannot be smoothly discharged, so that the locking torque is increased. It is easy to cause the locking process to be broken, and the forming length of the drill tail 13 completely considers the thickness of two pieces (not shown) that should be locked, and the length of the tail portion 13 is relatively too long, which is invisibly increased. Loss of molding die, resulting in increased manufacturing costs. ..., ^ In view of this, the industry has further developed another shape of the screw 2; referring to Figure 2, the improvement of the conventional screw 2 is: the tail of the drill. Form a neck area 2 5 with the , and the tired teeth # and 2 4, and the neck area? The outer diameter of q + Η 1 / B 3 is smaller than the outer diameter d2 of the tail 23 of the drill; when it is locked, it is the same as that of the interview. Lin, the tail of the drill 4 4337228
ίο 15 20 23之切削刀233先.行鑽鎖，而鑽鎖過程中所產生之切屬， 可經由該排屑溝232往上移動，而該頸縮設計之頸部區25 更輔助該部份切屬排出，以減少排屑阻礙，雖然習知鑽尾 螺絲2藉由該頸部區25之增設而提升排屑效果，以及適 時減少該鑽尾部23成型長度，而降低製造成本等功效， 但此一習知鑽尾螺絲2之運用完全係針對厚度較厚之物件 (圖中未示出），#於習知鑽尾螺絲2需具有較佳強度支 撑，方能使該鑽尾部23順利進行鑽鎖進入，不過，卻因 該頸縮區25外徑縮小設計料，㈣無法承受過大扭力 而產生斷裂現象’進而影響該螺絲2之鎖合定位，仍有待 改進。 【發明内容】 因此’本發明之目的是在提供-種具有複鑽尾之螺 絲’其具有加快鑽鎖速度、降低鎖合扭力且有效增進鎖合 效率等功效。 於是，本發明具有複鑽尾之螺絲，其主要包含一螺 頭’―由該螺頭向外延伸之桿體’一設於該桿體上且相反 於朗頭方向之鑽尾部’以及—螺旋環設於該桿體上之螺 =段；其中，該錯尾部與該螺牙段間至少形成有—副切削 !，其上形成有複數凹陷區及複數切削刀，以便鎖合時， 糟由泫鑽尾部配合該切削刃與凹陷區之輔助切削與導引 下’可使切屑得以更為迅速排出，進而有效降低於鑽鎖過 程中所產生之鎖合阻力與扭力產生，達到快速鎖合及有效 增進鎖合效率等功效。 5 1337228 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之較佳實施例的詳細說明中，將可清楚 的明白。 在本發明被詳細描述前，要注意的是，在以下的說明 中’類似的元件是以相同的編號來表示。 參閱圖3，本發明具有複鑽尾之螺絲3之第丨較佳實 施例，該螺絲3包含有一桿體32，一設於該桿體一端之螺 頭31’ 一相反於該螺頭31方向且形成於該桿體32另一端 之鑽尾部33，以及一螺旋環設於該桿體32上之螺牙段 34’其中’該鑽尾部33具有一鑽尾331，以及至少一開設 於該鑽尾331上之排屑溝332，而該鑽尾部33與螺牙段 34間形成有一副切削段35，而該副切削段35可利用衝壓 直接成型’故其可具有較高強度；另，該副切削段35具 有一本體351 ’ 一鄰近該螺牙段34端緣之頂端352，一近 該鑽尾部33之底端353’以及複數開設於該頂端352與底 端353間且位於該本體351上之凹陷區354、凸出區355， 而前述該每一凹陷區354之一端更向外延伸形成有一切削 面356 ’以便該切削面356可與該相鄰之另一凸出區355 相接形成有一切削刃357 ’且該切削刃356可呈圖3所示， 其係該桿體32之中心α (如假想線所示）呈平行之設置， 亦或如圖5中所示之傾斜設置型態，而本實施例中係以圖 3所示為例加以說明。 參閱圖4，鎖合時，首先利用該鑽尾331對該物件4 is) 6 1337228 進订鑽鎖，而使該螺絲3呈漸進式鑽鎖進入該物件4中； &時#於該副切削段35具有較佳強度以供鑽鎖並可避 t鎖合扭力過大產生之毁損斷裂現象；另外，直至則切 肖，i段35抵觸該物件4時，該切削刃357則可同時輔助該 5 鑽尾部33進行後續鑽鎖作用，以利後續之該螺牙段34得 以快速鑽鎖進人該物件4中，同時鑽鎖過程中產生之切 屑’係可藉該排屑-溝332快速向外排出至該凹陷區354處 ★置’以避免切屑無法順利排出產生阻塞現象，有效降低 鎖合阻力及扭力的增加，所以該螺絲3得以快速鎖合進入 1〇 夕卜同時避免於鑽鎖過程中，該鑽尾如因鑽切磨擦所產 生之鈍化現象而影響該鑽尾331之鑽切效果與效率。 I閱圖6,本發明之第3較佳實施例，該螺絲3仍包 含有一螺頭3卜一由該螺頭31肖外延伸之桿體32，一相 反於該螺頭31方向且形成於該捍體32 一端之鑽尾部33, 15 —旋螺環設於該桿體犯上之螺牙段34，以及—形成於該 • 鑽尾部33與該螺牙段34間之副切削段35等構件；其中， 别述構件構造 '連結關係等均同於該第丨、2實施例所述 相同，恕不詳述；特別是，本實施例該副切削段35之頂 端352外徑D1大於該底端353之外徑D2，以使該本體351 20 由該螺牙段34端緣往該鑽尾部33方向漸縮形成推拔態， 故忒副切削段35可具有較大容屑空間供切眉容置外，同 時該切削刃357係以平行設置為例加以說明，以便該副切 削段35鎖合過中’可利用該副切削段35呈推拔狀，所 以該副切削段35之呈漸進方式達到輔助切削效果，故切 7 削壯中仔从更加快速、省力地進行鎮鎖，有效降低鎖合 阻力與扭力，以及有效增進鎖合效率等功效。 -閱圖7 ’本發明之第4較佳實施例該螺 :有^桿體32’鑽尾部33及螺牙段34等構件； 貫施例係以第1實施例構造為基準，同時更在於今 鑽尾部犯與該螺牙段34間設置有複數相接之副切削段 可依據該副切削段35所需之長度可採用前述實 e例所述之_次衝壓成型外，㈣㈣㈣段&長㈣ 而曰加製、成型不易缺失’故採分段衝壓成型出複數之 ::35’藉此不但可節省成型模具(圖中未示)及加 ,,、機目、規模等技術層次，相對地該模具成本亦可有效減 5|i切則：壓成型之不良率可因此而降低，如此有效降低該 :…造成本，至於鑽鎖過程所產生之功效，亦 力H貫施例所述相同，具有加快鑽鎖速度 '降低鎖合扭 力且有效增進鎖合效率等功效。 ~納則述’本發明具有複鑽尾之 :::部與該螺牙段間形成有副切削段設計，以= Z该副切削段導引且輔助鑽鎖下，以使切屑排除更為迅 ，並此有效降低於鑽鎖過程中所產生之鎖合阻力與扭 有效增進鎖合效率等功效故能確實達到本發明之 目的’爰依法提出申請。 去2以上所述者，僅為說明本發明之較佳實施例而已， 專 聽疋本發明實施之範圍，即大凡依本發明申請 U㈣及發明說明書内容所作之簡單的等效變化與修 飾，皆應仍屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 圖1是習知鑽尾螺絲之立體示意圖； 圖2是另一習知鑽尾螺絲之立體示意圖； 圖3是本發明之第1較佳實施例之示意圖； 圖4是該第1較佳實施例之鎖合狀態示意圖； 圖5是本發明之第2較佳實施例之示意圖； 圖6是本發明之第3較佳實施例之示意圖；及 圖7是本發明之第4較佳實施例之示意圖。 【主要元件符號說明】 i S] 3 複鑽尾螺絲 31 螺頭 32 桿體 33 鑽尾部 34 螺牙 35 副切削段 331 鑽尾 332 排屑溝 351 本體 352 頂端 353 底端 354 凹陷區 355 凸出區 356 切削面 357 切削刃 a 桿體中心 D1 頂端外徑 D2 底端外徑The cutter 233 of ίο 15 20 23 first drills the drill, and the genus generated during the drill lock can be moved upward through the swarf groove 232, and the neck region 25 of the necked design further assists the portion The cutting edge is discharged to reduce the chip removal obstruction, although the conventional tail screw 2 enhances the chip removing effect by the addition of the neck region 25, and reduces the forming length of the tail portion 23 in a timely manner, thereby reducing the manufacturing cost and the like. However, the application of the conventional self-drilling screw 2 is completely for a thicker object (not shown), and the conventional drill-end screw 2 needs to have better strength support so that the drill tail 23 can be smoothly completed. The drilling lock is entered, but the outer diameter of the necking area 25 is reduced, and (4) the large torsion force cannot be subjected to the fracture phenomenon, which in turn affects the locking position of the screw 2, and needs to be improved. SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a screw having a multi-drilling tail which has an effect of speeding up the drilling lock speed, reducing the locking torque, and effectively improving the locking efficiency. Thus, the present invention has a re-drilling screw, which mainly comprises a screw head '- a rod body extending outward from the screw head', a drill tail portion disposed on the rod body opposite to the direction of the head end, and a spiral a screw=segment disposed on the rod body; wherein at least a sub-cutting is formed between the wrong tail portion and the threaded portion, and a plurality of recessed regions and a plurality of cutting cutters are formed thereon for locking The auxiliary cutting and guiding of the boring tail and the cutting edge and the recessed area can make the swarf discharge more quickly, thereby effectively reducing the locking resistance and the torsion generated during the drilling and locking process, and achieving rapid locking and Effectively improve the efficiency of the lock and other effects. The above and other technical contents, features, and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments of the invention. Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals. Referring to FIG. 3, a third preferred embodiment of the present invention has a reaming screw 3. The screw 3 includes a rod 32, and a screw head 31' disposed at one end of the rod body is opposite to the screw head 31. And a drill tail portion 33 formed at the other end of the rod body 32, and a threaded portion 34' of the spiral ring disposed on the rod body 32, wherein the drill tail portion 33 has a drill tail 331, and at least one is opened on the drill a chip ditch 332 on the tail 331 and a pair of cutting segments 35 formed between the tail portion 33 and the thread segment 34, and the sub-cutting segment 35 can be directly formed by stamping so that it can have a higher strength; The auxiliary cutting section 35 has a body 351 ′ adjacent to the end 352 of the end edge of the threaded section 34 , a bottom end 353 ′ of the drill tail 33 , and a plurality of the bottom end 352 and the bottom end 353 are located between the body 351 . a recessed area 354 and a raised area 355, and one end of each of the recessed areas 354 further outwardly defines a cutting surface 356' so that the cutting surface 356 can be connected to the adjacent protruding area 355. A cutting edge 357 ' is formed and the cutting edge 356 can be as shown in FIG. 3, which is among the rods 32 The heart α (as indicated by the imaginary line) is arranged in parallel, or is inclined as shown in Fig. 5, and is illustrated by way of example in Fig. 3 in this embodiment. Referring to FIG. 4, when locking, the drill 4 is first used to staple the object 4 is) 6 1337228, and the screw 3 is progressively drilled into the object 4; & The cutting section 35 has better strength for the drill lock and can avoid the damage and breakage phenomenon caused by the excessive torque of the t-locking; in addition, until the i-segment 35 interferes with the object 4, the cutting edge 357 can simultaneously assist the cutting section 357. 5 The drill tail portion 33 performs the subsequent drilling and locking function, so that the screw thread portion 34 can be quickly drilled into the object 4, and the chip generated during the drilling and locking process can be quickly moved to the chip removing groove 332. Externally discharged to the recessed area 354 ★ set 'to avoid the chip can not be smoothly discharged to produce a blocking phenomenon, effectively reducing the locking resistance and the increase of the torque, so the screw 3 can be quickly locked into the 1⁄2 while avoiding the drilling and locking process In the middle, the drill tail affects the drilling effect and efficiency of the drill tail 331 as a result of the passivation phenomenon caused by the drilling and cutting friction. Referring to FIG. 6, in a third preferred embodiment of the present invention, the screw 3 further includes a screw head 3, a rod body 32 extending from the screw head 31, and a direction opposite to the screw head 31. The drill tail portion 33, 15 at one end of the body 32 is provided with a threaded portion 34 of the screw body, and a sub-cutting segment 35 formed between the drill tail portion 33 and the threaded portion 34. The description of the member structure 'connection relationship and the like is the same as that described in the second embodiment and the second embodiment, and will not be described in detail; in particular, the outer diameter D1 of the top end 352 of the auxiliary cutting segment 35 in this embodiment is larger than the bottom. The outer diameter D2 of the end 353 is such that the body 351 20 is tapered from the end edge of the screw segment 34 toward the drill tail portion 33, so that the auxiliary cutting segment 35 can have a large chip space for cutting the eyebrow. The sub-cutting section 35 is progressively disposed, and the cutting edge 357 is illustrated as a parallel arrangement so that the sub-cutting section 35 is locked in the middle of the sub-cutting section 35, so that the sub-cutting section 35 is progressive. The way to achieve the auxiliary cutting effect, so cut and strengthen the middle Aberdeen from the more rapid and labor-saving lock, effectively reduce the locking resistance and Torque, and effectively improve the efficiency of the lock. - Figure 7 'The fourth preferred embodiment of the present invention: the snail: has a member 32' drill tail portion 33 and a threaded portion 34; the embodiment is based on the structure of the first embodiment, and more The sub-cutting section of the present drill tail and the threaded section 34 may be provided with a plurality of sub-cutting sections. The length required for the sub-cutting section 35 may be the same as that described in the above-mentioned example, (4) (4) (4) & Long (four) and the addition of the system, the molding is not easy to be missing', so the section is stamped and formed into a plurality of:: 35', which not only saves the molding die (not shown) and the technical level of addition, machine, scale, etc. Relatively, the cost of the mold can also be effectively reduced by 5|i: the defect rate of the press forming can be reduced accordingly, so that the effect is effectively reduced: the effect of the drill-locking process is also effective. As described above, it has the effect of speeding up the drilling lock speed, reducing the locking torque and effectively improving the locking efficiency. ~纳则述' The present invention has a re-drilling tail::: The sub-cutting section is formed between the part and the threaded section, and the sub-cutting section is guided by the Z-cutting section and the auxiliary drilling is locked to make the chip removal more Xun, and this effectively reduces the locking resistance generated during the drilling and locking process and the effect of twisting effectively improving the locking efficiency, so that the purpose of the present invention can be truly achieved. The above description of the preferred embodiment of the present invention is intended to be merely illustrative of the scope of the present invention, that is, the simple equivalent changes and modifications made by the U. It should remain within the scope of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a conventional drill tail screw; FIG. 2 is a perspective view of another conventional drill tail screw; FIG. 3 is a schematic view of a first preferred embodiment of the present invention; Figure 5 is a schematic view of a second preferred embodiment of the present invention; Figure 6 is a schematic view of a third preferred embodiment of the present invention; and Figure 7 is a schematic view of the present invention. A schematic view of a fourth preferred embodiment. [Main component symbol description] i S] 3 Double drill tail screw 31 Screw head 32 Rod body 33 Drill tail 34 Screw 35 Sub-cutting section 331 Drill tail 332 Chip groove 351 Body 352 Top 353 Bottom end 354 Depression area 355 Projection Zone 356 cutting face 357 cutting edge a rod center D1 top outer diameter D2 bottom outer diameter