TW202010950A

TW202010950A - Drilling torque-reducing screw

Info

Publication number: TW202010950A
Application number: TW107131132A
Authority: TW
Inventors: 蘇國材; 蘇振榮
Original assignee: 慶達科技股份有限公司
Priority date: 2018-09-05
Filing date: 2018-09-05
Publication date: 2020-03-16
Also published as: TWI705201B

Abstract

Drilling torque-reducing screw is characterized in that a shank is provided with a plurality of cutting threads, each of which has a plurality of slots formed thereon to provide a plurality of first cutting edges and second cutting edges. Meanwhile, a groove is recessed at a connection of the first cutting edge and the second cutting edge to provide two crests. Hence, the first and second cutting edges cooperate with the crests, thereby assisting in reaming quickly, increasing the whole cutting speed, breaking fibers of an object effectively, preventing the fibers from entangling around the screw, preventing the screwing operation from being hindered caused by the entanglement of the fibers, and reducing the drilling torque greatly. Further, the slots and grooves can accommodate debris properly, thereby attaining a tight engagement between the screw and the object, increasing the pulling capacity effectively, and enhancing the engaging stability of the screw.

Description

具低旋鎖扭力之螺絲Screw with low twist lock torque

本發明是有關於一種鎖合件，特別是一種具低旋鎖扭力之螺絲。The invention relates to a locking part, especially a screw with low twisting torque.

參閱圖1，習知螺絲1包含有一桿體11，一設於該桿體11一端之螺頭12，一設於該桿體11另一端且相反於該螺頭12之鎖合部13，以及複數設於該桿體11並朝該鎖合部13延伸之螺牙14；其中，該鎖合部13漸縮形成一鑽尖131；使用時，首先將該鑽尖131抵壓於一鎖合物（圖中未示）之表面上，並於該螺頭12施予一旋轉扭力，以透過該鑽尖131以漸進擠壓方式於該鎖合物上進行鑽孔，待該鎖合部13逐漸螺入該鎖合物後，該等螺牙14接續該鎖合部13進而針對該鎖合物進行切削，藉以連動該桿體11隨著該等螺牙14的切削而進入該鎖合物內，進而完成該螺絲1之鎖合作業。Referring to FIG. 1, the conventional screw 1 includes a rod body 11, a screw head 12 provided at one end of the rod body 11, a locking portion 13 provided at the other end of the rod body 11 and opposite to the screw head 12, and A plurality of screws 14 provided on the rod body 11 and extending toward the locking portion 13; wherein, the locking portion 13 is tapered to form a drill tip 131; when in use, the drill tip 131 is first pressed against a lock On the surface of the object (not shown in the figure), a rotational torque is applied to the screw head 12 to drill holes in the lock compound through the drill tip 131 in a progressive squeeze manner, waiting for the lock portion 13 After gradually screwing into the lock compound, the screw teeth 14 are connected to the lock portion 13 to cut the lock compound, so as to link the rod body 11 into the lock compound as the screw teeth 14 are cut Within, the lock cooperation of the screw 1 is completed.

然，實際使用後發現，該螺絲1於該鎖合物上進行鎖設時，其鎖合初期僅能利用該鑽尖131以擠壓的方式進入該鎖合物內，直到該鎖合部13進入該鎖合物後，該等螺牙14才能接續該鎖合部13進行該鎖合物之切削作業，惟，該等螺牙14無法有效破壞該鎖合物之纖維，致使該纖維易纏繞於該螺絲1上，更加導致旋鎖扭力提高，同時後續鎖合所產生的切屑更可能受該積存之纖維阻礙而無法及時向外排出，致使該螺絲1無法繼續向內旋入，更是增加鎖合的困難度，此時若該螺絲1持續向下鑽鎖該鎖合物，更可能導致該螺絲1發生損壞、鈍化或斷裂之情況，亦或造成該鎖合物裂材之情事產生，再者，該螺絲1無法有效與該鎖合物咬合，致使該螺絲1容易產生鬆動之現象，當該螺絲1受外力拉扯或震動時，極容易造成該螺絲1產生鬆動、搖晃或脫落的情況，進而導致該螺絲1鎖合效果不彰，實有待改善。However, after actual use, it was found that when the screw 1 is locked on the lock compound, the initial locking can only use the drill tip 131 to squeeze into the lock compound until the lock part 13 After entering the lock compound, the screw teeth 14 can continue the cutting operation of the lock compound with the lock portion 13, but the screw teeth 14 cannot effectively damage the fiber of the lock compound, causing the fiber to be easily entangled On the screw 1, the torque of the twist lock is increased, and the chips generated by the subsequent lock are more likely to be hindered by the accumulated fibers and cannot be discharged in time, so that the screw 1 cannot continue to be screwed in, and it is increased. The difficulty of locking, if the screw 1 continues to drill down and lock the lock compound at this time, it may cause damage, passivation or breakage of the screw 1 or cause the lock compound to crack the material. Furthermore, the screw 1 cannot be effectively engaged with the lock compound, so that the screw 1 is prone to loosen. When the screw 1 is pulled or vibrated by external force, it is easy to cause the screw 1 to loosen, shake or fall off. In turn, the locking effect of the screw 1 is poor, and it needs to be improved.

因此，本發明之目的，是在提供一種具低旋鎖扭力之螺絲，其可有效斬切鎖合物纖維，有助於降低旋鎖扭力與提升切削速度，同時快速排屑，並於鎖合後達到較佳的咬合穩定度。Therefore, the purpose of the present invention is to provide a screw with low twist lock torque, which can effectively cut the lock compound fiber, help reduce the twist lock torque and improve the cutting speed, and at the same time quickly chip removal, and in the lock After reaching a better bite stability.

於是，本發明具低旋鎖扭力之螺絲，其包含有一桿體，分別設於該桿體兩端之螺頭及鎖合部，以及複數設於該桿體上之切削螺牙；其中，該每一切削螺牙包含有分別由該桿體向外延伸之上牙面及下牙面，以及複數開設於該上牙面與該下牙面相接處之切槽及開槽，而該每一切槽具有複數第一切刃，複數與該等第一切刃相接之第二切刃，以及形成於該第一切刃與該第二切刃相接處之牙底，另該每一開槽兩端分別形成有上牙峰及下牙峰；是以，該等第一切刃及第二切刃配合該等上牙峰及下牙峰得以於鎖合初期快速進行擴孔，同時有效斬切鎖合物之纖維，以利輔助該螺絲旋鎖進入，不僅有效提升切削速度，同時避免該纖維纏繞於該桿體之情事產生，更加大幅降低旋鎖扭力，另，鎖合時所產生的切屑可沿著該等切削螺牙向外排出，更達快速排屑，以及避免該切屑過度積存而導致該鎖合物裂材之情事產生，再者，該等切槽及開槽不僅可供來不及排出之切屑容納，同時部分切屑於鎖合後積存於該等切槽及該等開槽處，更加有助於提升該螺絲與該鎖合物間之穩固咬合，不僅有效增加拉拔力外，更提高該螺絲旋入之咬合穩定度。Therefore, the screw with low twist lock torque of the present invention includes a rod body, a screw head and a locking portion respectively provided at both ends of the rod body, and a plurality of cutting threads provided on the rod body; wherein, the Each cutting thread includes an upper tooth surface and a lower tooth surface respectively extending outward from the rod body, and a plurality of notches and slots opened at the junction of the upper tooth surface and the lower tooth surface, and each All grooves have a plurality of first cutting edges, a plurality of second cutting edges that are in contact with the first cutting edges, and a tooth bottom formed at the junction of the first cutting edge and the second cutting edge, and each The upper and lower tooth peaks are formed at the two ends of the slot respectively; therefore, the first cutting edge and the second cutting edge cooperate with the upper and lower tooth peaks to quickly expand the hole at the early stage of the lock, and at the same time Effectively chopping the fiber of the lock compound, to assist the screw spin lock to enter, not only effectively increase the cutting speed, but also avoid the occurrence of the situation that the fiber is entangled in the rod body, and greatly reduce the twist lock torque. In addition, when the lock is locked The generated chips can be discharged outward along the cutting threads to achieve faster chip evacuation, and to avoid the excessive accumulation of the chips to cause the lock compound to crack the material. Moreover, the cutting and grooving not only It can accommodate the chips that are too late to be discharged. At the same time, some chips are stored in the grooves and the slots after locking, which is more helpful to improve the stable engagement between the screw and the lock compound, which not only effectively increases the pulling In addition to the force, the stability of the engagement of the screw is improved.

有關本發明之前述及其他技術內容、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。The foregoing and other technical contents, features and effects of the present invention will be clearly understood in the following detailed description with reference to the preferred embodiments of the drawings.

參閱圖2所示，本發明之一較佳實施例，該具低旋鎖扭力之螺絲3包含有一桿體31，一設於該桿體31一端之螺頭32，一設於該桿體31另一端且相反於該螺頭32之鎖合部33，以及複數設於該桿體31上且朝該鎖合部33延伸之切削螺牙34；其中，該鎖合部33漸縮形成一鑽尖331，且該鎖合部33漸縮交會於該鑽尖331後向外延伸形成之角度A1較佳為22~26度設置為之，而本實施例中，該桿體31上另設有複數輔助螺牙35，且該等輔助螺牙35呈完全牙型態設置，前述該等輔助螺牙35較佳為設置於鄰近該螺頭32處為之，而該等切削螺牙34係呈波浪狀態樣設置，即如圖4所示，且該等切削螺牙34較佳為設置於鄰近該鎖合部33處為之，另該等切削螺牙34之外徑34d小於該等輔助螺牙35之外徑35d。Referring to FIG. 2, a preferred embodiment of the present invention, the screw 3 with low twist lock torque includes a rod body 31, a screw head 32 provided at one end of the rod body 31, and a rod body 31 The locking portion 33 at the other end and opposite to the screw head 32, and a plurality of cutting threads 34 provided on the rod body 31 and extending toward the locking portion 33; wherein, the locking portion 33 is tapered to form a drill The tip 331, and the angle A1 formed by the tapered intersection of the locking portion 33 and extending outward after the drill tip 331 is preferably set at 22 to 26 degrees, and in this embodiment, the rod body 31 is further provided with A plurality of auxiliary threads 35, and the auxiliary threads 35 are arranged in a complete tooth shape, the auxiliary threads 35 are preferably arranged adjacent to the screw head 32, and the cutting threads 34 are It is arranged in a wave state, as shown in FIG. 4, and the cutting threads 34 are preferably arranged adjacent to the locking portion 33, and the outer diameter 34d of the cutting threads 34 is smaller than the auxiliary threads The outer diameter of the tooth 35 is 35d.

參閱圖2及圖3，該每一切削螺牙34包含有一由該桿體31向下延伸之上牙面341，一由該桿體31向上延伸之下牙面342，複數開設於該上牙面341與該下牙面342相接處之切槽343，以及複數凹設於該上牙面341與該下牙面342相接處之開槽344，且該開槽344中心水平向外延伸定義一基準線R1，而本實施例中，該上牙面341向外延伸與該基準線R1交會形成之傾斜角度A2與該下牙面342向外延伸與該基準線R1交會形成之傾斜角度A3不同，該傾斜角度A2較佳為10度為之，而該傾斜角度A3較佳為30度為之。2 and 3, each cutting thread 34 includes an upper tooth surface 341 extending downward from the rod 31, a lower tooth surface 342 extending upward from the rod 31, a plurality of openings are formed on the upper tooth The notch 343 at the junction of the surface 341 and the lower tooth surface 342, and the plurality of slots 344 recessed at the junction of the upper tooth surface 341 and the lower tooth surface 342, and the center of the slot 344 extends horizontally outward A reference line R1 is defined, and in this embodiment, the inclination angle A2 formed by the upper tooth surface 341 extending outwards and intersecting the reference line R1 and the inclination angle formed by the lower tooth surface 342 extending outwards and intersecting the reference line R1 A3 is different, the tilt angle A2 is preferably 10 degrees, and the tilt angle A3 is preferably 30 degrees.

參閱圖3及圖4，該每一切槽343具有複數第一切刃3431，複數與該等第一切刃3431相接之第二切刃3432，以及形成於該第一切刃3431與該第二切刃3432相接處之牙底3433，配合參閱圖5，該第一切刃3431向外延伸與該第二切刃3432向外延伸所交會之相交點向外延伸定義一中心線R2，而前述該第一切刃3431與該中心線R2交會形成之傾斜角度A4與該第二切刃3432與該中心線R2交會形成之傾斜角度A5呈不同設置，該傾斜角度A4較佳為60度，而該傾斜角度A5較佳為30度，另該每一開槽344開設於該上牙面341與該下牙面342相接處，以使該開槽344兩端分別形成有上牙峰3411及下牙峰3421。Referring to FIGS. 3 and 4, each groove 343 has a plurality of first cutting edges 3431, a plurality of second cutting edges 3432 connected to the first cutting edges 3431, and the first cutting edge 3431 and the first The bottom of the tooth 3433 where the two cutting edges 3432 meet. Referring to FIG. 5, the intersection point where the first cutting edge 3431 extends outward and the second cutting edge 3432 extends outward defines a center line R2. The inclination angle A4 formed by the intersection of the first cutting edge 3431 and the center line R2 is different from the inclination angle A5 formed by the intersection of the second cutting edge 3432 and the center line R2, and the inclination angle A4 is preferably 60 degrees And the inclination angle A5 is preferably 30 degrees, and each of the slots 344 is opened at the junction of the upper tooth surface 341 and the lower tooth surface 342, so that the upper teeth peaks are formed at both ends of the slot 344, respectively 3411 and lower tooth peak 3421.

參閱圖2至圖6所示，進行鎖合作業時，使用者首先將該鑽尖331抵頂於一鎖合物4之表面上，並於該螺頭32施予一旋轉扭力，以使該鑽尖331受該旋轉扭力帶動而鑽攻該鎖合物4，此時利用該等第一切刃3431與第二切刃3432配合該等上牙峰3411與該等下牙峰3421進行旋切，不僅有效針對該鎖合物4進行快速擴孔，以利提升整體切削速度外，同時針對該鎖合物4內部進行多角度旋切，以及有效破壞該鎖合物4之纖維，藉以有效避免該纖維纏繞於該鎖合部33及該桿體31上，更加大幅降低旋鎖扭力，且鎖合過程所產生之切屑可沿著該等切削螺牙34向外排出，更達快速排屑之功效，以及避免該鎖合過程受該切屑阻礙，亦或導致該鎖合物4裂材之情事產生，再者，部分切屑於鎖合後積存於該等切槽343、該等開槽344處及該等切削螺牙34之間，更加有助於提升拉拔力外，以及提高該螺絲3旋入之咬合穩定度。Referring to FIG. 2 to FIG. 6, when performing the locking operation, the user first presses the drill tip 331 against the surface of a lock compound 4 and applies a rotational torque to the screw head 32 to make the The drill tip 331 is driven by the rotational torque to drill the lock compound 4. At this time, the first cutting edge 3431 and the second cutting edge 3432 are used to cooperate with the upper tooth peaks 3411 and the lower tooth peaks 3421 to perform rotary cutting , Not only effective for the rapid expansion of the lock compound 4, in order to improve the overall cutting speed, but also for the multi-angle rotary cutting of the lock compound 4, and effectively destroy the fiber of the lock compound 4, so as to effectively avoid The fiber is wound on the locking portion 33 and the rod body 31, which greatly reduces the twisting torque of the twist lock, and the chips generated during the locking process can be discharged outward along the cutting threads 34, so as to achieve rapid chip removal Efficacy, and to prevent the locking process from being hindered by the chips, or causing the lock compound 4 to crack the material, and furthermore, part of the chips accumulate in the slots 343 and the slots 344 after locking And between the cutting threads 34, it is more helpful to increase the pulling force and improve the bite stability of the screw 3 screwed in.

參閱圖7至圖9，本發明之第二較佳實施例，其仍包含有前一實施例所述之構件，而本實施例特別在於：該等開槽344向內開設延伸至該牙底3433處，以使任二開槽344相互連通，因此，該等擴大之開槽344不僅有利於導屑與快速排屑，且可供更多切屑容納於內，以使該螺絲3與該鎖合物4間達到更緊密之咬合，藉以提升拉拔力，以及提高該螺絲3旋入之咬合穩定度。7 to 9, the second preferred embodiment of the present invention still includes the components described in the previous embodiment, and this embodiment is particularly characterized in that the slots 344 are opened inwardly and extend to the tooth bottom 3433 places, so that any two slots 344 communicate with each other. Therefore, the enlarged slots 344 are not only conducive to chip guide and rapid chip removal, but also allow more chips to be accommodated inside, so that the screw 3 and the lock The compound 4 achieves a closer bite, thereby improving the pulling force and improving the bite stability of the screw 3 screwed in.

歸納前述，本發明具低旋鎖扭力之螺絲，其藉由該上牙面與該下牙面相接處開設有該等切槽及凹槽，以形成該等第一切刃、第二切刃、上牙峰及下牙峰，因此，不僅可藉由該等第一切刃及第二切刃配合該等上牙峰及下牙峰快速進行擴孔，以及提升整體切削速度外，同時有效斬切該鎖合物之纖維，以利降低旋鎖扭力，再配合該等切槽與該等開槽適度容納及壓掣部分切屑，更加提升拉拔力，以及提高旋入後的咬合穩定度。In summary, the screw with low twist lock torque of the present invention is formed with the cutting grooves and grooves at the junction of the upper tooth surface and the lower tooth surface to form the first cutting edge and the second cutting Blade, upper tooth peak and lower tooth peak, therefore, not only can the first cutting edge and the second cutting edge cooperate with the upper tooth peak and the lower tooth peak to quickly expand the hole, and to improve the overall cutting speed, at the same time Effectively cut the fiber of the lock compound to reduce the twisting torque of the twist lock, and then cooperate with the cutting grooves and the grooves to properly accommodate and suppress part of the chips, further enhance the pulling force, and improve the stability of the bite after screwing degree.

惟以上所述者，僅為說明本發明之較佳實施例而已，當不能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及發明說明書內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內。However, the above are only for explaining the preferred embodiments of the present invention, but the scope of the implementation of the present invention cannot be limited by this, that is, simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the description of the invention , Should still fall within the scope of this invention patent.

（習知）1:螺絲11:桿體12:螺頭13:鎖合部14:螺牙131:鑽尖（本發明）3:具低旋鎖扭力之螺絲31:桿體32:螺頭33:鎖合部34:切削螺牙35:輔助螺牙331:鑽尖341:上牙面342:下牙面343:切槽344:開槽3411:上牙峰3421:下牙峰3431:第一切刃3432:第二切刃3433:牙底A1:鎖合部交會形成之角度A2:上牙面與基準線形成之角度A3:下牙面與基準線形成之角度A4:第一切刃之傾斜角度A5:第二切刃之傾斜角度34d:切削螺牙之外徑35d:輔助螺牙之外徑R1:基準線R2:中心線4:鎖合物(Knowledge) 1: Screw 11: Bar body 12: Screw head 13: Locking part 14: Thread 131: Drill tip (invention) 3: Screw with low twisting torque 31: Bar body 32: Screw head 33 : Locking part 34: Cutting thread 35: Auxiliary thread 331: Drill tip 341: Upper tooth surface 342: Lower tooth surface 343: Slotted 344: Slotted 3411: Upper tooth peak 3421: Lower tooth peak 3431: First Cutting edge 3432: second cutting edge 3433: tooth bottom A1: angle formed by the intersection of the locking part A2: angle formed by the upper tooth surface and the reference line A3: angle formed by the lower tooth surface and the reference line A4: the first cutting edge Inclination angle A5: Inclination angle of the second cutting edge 34d: Outer diameter of cutting thread 35d: Outer diameter of auxiliary thread R1: Base line R2: Center line 4: Lock compound

圖1是習知螺絲之示意圖。圖2是本發明第一較佳實施例之立體示意圖。圖3是該第一較佳實施例之局部構件放大圖。圖4是該第一較佳實施例之另一立體示意圖。圖5是圖2之S-S線剖面示意圖。圖6是該第一較佳實施例之鎖合狀態示意圖。圖7是本發明第二較佳實施例之立體示意圖。圖8是該第二較佳實施例之局部構件放大圖。圖9是圖7之S-S線剖面示意圖。Figure 1 is a schematic diagram of a conventional screw. 2 is a perspective schematic view of the first preferred embodiment of the present invention. Fig. 3 is an enlarged view of a part of the first preferred embodiment. FIG. 4 is another schematic perspective view of the first preferred embodiment. 5 is a schematic cross-sectional view taken along line S-S in FIG. 2. 6 is a schematic view of the locked state of the first preferred embodiment. 7 is a perspective schematic view of a second preferred embodiment of the present invention. Fig. 8 is an enlarged view of a part of the second preferred embodiment. 9 is a schematic cross-sectional view taken along line S-S in FIG. 7.

3:具低旋鎖扭力之螺絲 3: Screws with low twist lock torque

31:桿體 31: Rod body

32:螺頭 32: screw head

33:鎖合部 33: Locking part

34:切削螺牙 34: Cutting thread

35:輔助螺牙 35: auxiliary thread

331:鑽尖 331: Drill tip

A1:鎖合部交會形成之角度 A1: The angle formed by the intersection of the lock part

A2:上牙面與基準線形成之角度 A2: The angle formed by the upper tooth surface and the reference line

A3:下牙面與基準線形成之角度 A3: The angle formed by the lower tooth surface and the reference line

34d:切削螺牙之外徑 34d: outer diameter of cutting thread

35d:輔助螺牙之外徑 35d: outer diameter of auxiliary thread

R1:基準線 R1: baseline

Claims

一種具低旋鎖扭力之螺絲，其包含有一桿體，一設於該桿體一端之螺頭，一相反於該螺頭且設於該桿體另一端之鎖合部，以及複數設於該桿體上且朝該鎖合部延伸之切削螺牙；其中，該鎖合部漸縮形成一鑽尖；其特徵在於：該每一切削螺牙包含有一由該桿體向下延伸之上牙面，一由該桿體向上延伸之下牙面，複數開設於該上牙面與該下牙面相接處之切槽，以及複數凹設於該上牙面與該下牙面相接處之開槽；其中，該每一切槽具有複數第一切刃，複數與該等第一切刃相接之第二切刃，以及形成於該第一切刃與該第二切刃相接處之牙底，另該開槽定義有一基準線，且該每一開槽兩端分別形成有上牙峰及下牙峰。A screw with low twist lock torque includes a rod body, a screw head provided at one end of the rod body, a locking part opposite to the screw head and provided at the other end of the rod body, and a plurality of A cutting thread on the rod body extending toward the locking portion; wherein the locking portion is tapered to form a drill tip; characterized in that each cutting thread includes an upper tooth extending downward from the rod body Surface, a lower tooth surface extending upward from the rod body, a plurality of slots formed at the junction of the upper tooth surface and the lower tooth surface, and a plurality of recesses provided at the junction of the upper tooth surface and the lower tooth surface Groove; wherein, each groove has a plurality of first cutting edges, a plurality of second cutting edges that are in contact with the first cutting edges, and a point where the first cutting edge and the second cutting edge are formed In the bottom of the tooth, the slot defines a reference line, and an upper tooth peak and a lower tooth peak are formed at both ends of each slot.

依據申請專利範圍第1項所述之具低旋鎖扭力之螺絲，其中，該等切削螺牙呈波浪狀態樣設置。According to the screw with low twist-lock torque described in item 1 of the patent application scope, the cutting threads are arranged in a wavy state.

依據申請專利範圍第1項所述之具低旋鎖扭力之螺絲，其中，該等開槽向內開設延伸至該牙底處，以使任二開槽相互連接。According to the screw with low twist lock torque described in item 1 of the patent application scope, wherein the slots are opened inward and extend to the bottom of the tooth, so that any two slots are connected to each other.

依據申請專利範圍第1項所述之具低旋鎖扭力之螺絲，其中，該第一切刃與該第二切刃呈不同傾斜角度設置。According to the screw with low twist lock torque described in item 1 of the patent application scope, wherein the first cutting edge and the second cutting edge are arranged at different inclination angles.

依據申請專利範圍第1項所述之具低旋鎖扭力之螺絲，其中，該上牙面向外延伸與該基準線交會之傾斜角度與該下牙面向外延伸與該基準線交會形成之傾斜角度不同。The screw with low twist lock torque according to item 1 of the scope of the patent application, wherein the angle of inclination formed by the extension of the upper tooth face meeting the reference line and the angle of inclination formed by the extension of the lower tooth face meeting the reference line different.

依據申請專利範圍第1項所述之具低旋鎖扭力之螺絲，其中，該桿體上另設有複數輔助螺牙，且該等輔助螺牙呈完全牙型態設置。According to the screw with low twist lock torque described in item 1 of the patent application scope, a plurality of auxiliary threads are additionally provided on the rod body, and the auxiliary threads are arranged in a complete tooth shape.