TWM519685U - Locking fastener - Google Patents

Description

Locking fastener

The present invention relates to a fastener design, in particular to a locking fastener with good drilling capability.

Referring to FIG. 1 , the conventional fastener 1 includes a screw head 11 , a rod body 12 extending outward from the screw head 11 , and a plurality of spiral rings disposed on the rod body 12 and extending in the direction of the screw head 11 . a tooth 13; wherein the rod body 12 is opposite to the other end of the screw head 11 to form a free end 121; so that the screw head 11 is subjected to a driving force to interlock the free end 121 to be screwed into the lock In the object 2, the lock compound 2 is cut by the thread 13, and the rod body 12 is screwed into the lock compound 2 to achieve the locking positioning effect of the fastener 1.

However, after actual use, it is found that the fastener 1 is still missing as described below after use, as follows:

1. Drilling lock efficiency is poor: in view of the locking process, the fastener is cut by the thread 13, so that the wood fiber of the lock compound 2 cannot be effectively cut completely during the locking process, resulting in the The rod body 12 is easily entangled with the wood fiber of the lock compound 2 in the lock, so that the thread 13 forms a closer contact with the lock compound 2, so that the lock process needs to be more large. Torque to make the fastener 1 screw into In the lock compound 2, the locking cutting resistance of the fastener 1 is further increased, and the rapid cutting is not effectively achieved, and the inconvenience is increased.

2. It is easy to cause cracking: In view of the fact that the chip generated by the initial cutting of the fastener 1 is easy to accumulate between the screw 13 and the rod 12, it cannot be smoothly discharged outward, so that the screw 13 continues to the lock afterwards. When the compound 2 is drilled and cut, the chips generated by the compound 2 will be mutually squeezed and outwardly diffused in the lock compound 2, so that not only the locking cutting speed is slowed, but also the The lock compound 2 cannot withstand excessive torque and the chips cannot be discharged outwards to cause cracking, which needs to be improved.

Therefore, the object of the present invention is to provide a locking fastener which has the effects of effectively reducing the locking resistance, increasing the locking cutting efficiency, and preventing the occurrence of cracking.

Thus, the novel locking fastener comprises a screw head, a rod body extending outward from the screw head, and a threaded screw provided on the rod body; wherein the thread has a plurality of openings a cutting tooth, a convex tooth disposed between the two cutting teeth, and a slit disposed between each of the protruding teeth and each of the teeth, wherein the protruding area of each of the protruding teeth is smaller than the area of each of the teeth And each of the convex teeth is disposed through the slit, so that each of the convex teeth is formed by an inner and outer cutting surface, and the inner and outer cutting surfaces are formed with an end edge; Each of the teeth has a chord section extending outwardly from the inscribed surface, an end surface that is in contact with the chord section and that is adjacent to the other tangential surface of the other dent, and a cutting edge that is joined by the chord and the end surface And the aforementioned cutting teeth are disposed toward and in the direction of the screw twisting; when the locking is used, the thread is used The different structural designs of the cutting teeth and the convex teeth enable the cutting ability of the drill to be improved not only by the cutting teeth but also by the auxiliary cutting of the protruding teeth during the drilling and locking process. The friction generated by the screw and the lock compound during the drilling and locking process can be reduced, so that the locking fastener can be screwed into the inside and outside of the lock compound, and the cutting groove can be used for the chip to be discharged outward. The setting not only does not cause a large amount of chips to accumulate, but also effectively increases the locking rate to reduce the locking resistance, and also eliminates the accumulation and extrusion of excessive chips to prevent the occurrence of cracked materials.

[study]

1‧‧‧fasteners

11‧‧‧ screw head

12‧‧‧ rod body

13‧‧‧ thread

121‧‧‧Free end

2‧‧‧Lock compound

[This new type]

3‧‧‧Lock fasteners

31‧‧‧ screw head

32‧‧‧ rod body

33, 33’‧‧‧ thread

321‧‧‧Free end

322‧‧‧ ribs

331‧‧‧ teeth

332, 332'‧‧ ‧ convex teeth

333‧‧‧ slotting

3311‧‧‧chord face

3312‧‧‧ end face

3313‧‧‧ cutting edge

3321‧‧‧Inside

3322, 3322'‧‧‧ external section

3323‧‧‧End edge

4‧‧‧Lock compound

Θ‧‧‧ Rod Center

Figure 1 is a schematic view of a conventional lock fastener.

Figure 2 is a schematic view of a first preferred embodiment of the present invention.

Figure 3 is a cross-sectional view of the A-A of the first preferred embodiment.

4 is a schematic cross-sectional view showing different embodiments of the protruding teeth of the first preferred embodiment.

Figure 5 is a schematic view of a second preferred embodiment of the present invention.

Figure 6 is a schematic view of another embodiment of the second preferred embodiment.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention.

Referring to FIG. 2, in a first preferred embodiment of the present type of locking fastener 3, the locking fastener 3 includes a screw head 31, a rod body 32 extending outward from the screw head 31, and a plurality of spiral rings. a thread 33 on the rod 32; wherein the rod 32 is opposite to The other end of the screw head 31 is formed by the end 321 , and the free end 321 can be set as a pointed tail, a drill tail or the like according to the requirements of use. In the embodiment, the pointed tail is taken as an example for illustration.

In addition, the thread 33 has a plurality of teeth 331, a convex tooth 332 disposed between the two teeth 331, and a slit 333 between each of the teeth 332 and each of the teeth 331; The protruding area of each of the protruding teeth 332 is smaller than the area of each of the teeth 331 , and the protruding height of the protruding teeth 332 is smaller than the protruding height of the cutting teeth 331 , and the protruding teeth 332 are disposed through the cutting groove 333 . Then, each of the protruding teeth 332 is formed by an inner and outer cutting surface 3321, 3322, and the inner and outer cutting surfaces 3321, 3322 are formed with an end edge 3323, in particular, the convex The teeth 332 are disposed toward the twisting direction of the screw 33 as shown in FIG. 4, and of course, as shown in FIG. 5, the convex teeth 332 are disposed in a direction that does not follow the screw 33. In the present embodiment, FIG. 4 is taken as an example for explanation.

Continuing the foregoing, each of the teeth 331 has a chord section 3311 extending outwardly from the inner section 3321 of the convex tooth 332, a contact with the chord section 3311 and a section 3322' of the other protrusion 332'. The end face 3312 and the cutting edge 3313 formed by the chord and the end faces 3311, 3312 are arranged such that the cutting teeth 331 are disposed facing and arranged along the screwing direction of the screw 33, which is not only advantageous for rapid drilling. The locking, at the same time, the slits 333 can be arranged in the direction of the screw 33 to assist the discharge of the chips obtained during the drilling, which is advantageous for reducing the increase of the screwing resistance of the drill, and in the embodiment, the snails are partially The teeth 33 have the cutting teeth 331, the convex teeth 332 and the slits 333 as an example.

Referring to FIG. 3 and FIG. 4, when the lock is engaged on a lock compound 4, the free end 321 is first placed on the lock compound 4 while using a driving tool (not shown). A rotating torque is applied to the screw head 31. At this time, the free end 321 is driven by the driving tool, thereby driving the ring to be synchronously rotated and drilled with the screw 33 adjacent to the free end 321 . The rod body 32 is gradually screwed into the lock compound 4 during the driving of the driving tool, so that during the initial stage of the drilling lock, the thread 33 can be used to have the plurality of teeth, The different shapes of the protruding teeth 331, 332 are designed such that the cutting edge 3313 of each of the teeth 331 can be cut by the fiber of the lock compound 4 when screwed in, and then the convex teeth 332 are used. After the subsequent assistance, the fibers that have not been cut by the cutting teeth 331 are further smashed, so that the locking teeth 3 and the convex teeth 331 and 332 can cooperate to achieve the driving tool 3 each time the driving tool 3 is subjected to the driving tool. Driven by the push, the effect of screwing into the lock compound 4 is quickly achieved, so that not only can these be ensured The thread 33 does not cause skewing due to the torsion and the resistance during the drilling and locking process, and at the same time, the thread 33 can be quickly and effectively penetrated into the lock compound 4, thereby greatly increasing the drilling in the initial stage of the locking. The cutting ability can further reduce the friction and the locking resistance between the locking compound 4, and further, the setting of the slit 333 provided between each of the protruding teeth and the cutting teeth 332, 331 can be utilized to make the drilling The chips obtained during the attack can be moved not only by the slots 333 but also by the threads 33 in the direction of the screw head, thereby not only eliminating the excessive swarf in the lock compound 4 but also outwardly In addition to the expansion, it is also effective to prevent the occurrence of cracked material, and at the same time, some of the chips are left in the slots 333, and after the screw 31 is continuously applied, the subsequent screws 33 are subsequently applied. The cutting teeth 331 and the protruding teeth 332 can be connected The trajectory of the drilled lock advances, so that the thread 33 can quickly enter the lock compound 4 without resistance, and the skew phenomenon does not occur during the locking process, and the lock positioning effect can be better. Greatly improve the positioning effect and locking efficiency.

Referring to FIG. 5, the second preferred embodiment of the present invention is the same as the member described in the previous embodiment, and will not be described again; in this embodiment, the rod body 32 is at least between the two screws 33. The protrusion rib 322 is disposed in parallel with the center θ of the rod body 31. Of course, as shown in FIG. 6, the rib 322 can be centered with the rod body 32. The line θ is disposed obliquely; therefore, when the locking fastener 3 is locked, in the process of screwing into the lock compound 4, except for the different structures by the cutting teeth and the convex teeth 331, 332 The design is to achieve the reduction of the locking resistance to effectively increase the drilling lock speed, and the rod body 32 is provided with the rib 322 on the rod body 32 during the screwing process to assist the rod body. 32, the fiber of the lock compound 4 having an elastic restoring force is distracted during the locking process, so as to prevent the rod body 32 from being entangled by the untwisted fiber during the drilling and locking process, thereby preventing the locking fastener 3 from being screwed into The speed, and then the further, the rod body 32 continues to be screwed in, so that the lock body 4 fiber can cover the rod body 32 again, of course, drilling and cutting The obtained chip can also be discharged outward by using the slit 333, so that the locking process of the locking fastener 3 is more stable and smooth, and the locking efficiency is greatly improved.

From the foregoing description, it can be known that the present invention has the advantages and effects listed below compared with the conventional ones:

1. The drill lock has good efficiency and labor saving: the screw teeth 33 have the different structural designs of the cutting teeth and the convex teeth 331, 332, so that during the locking process, Increasing the cutting ability of the screws 33 to effectively cut the fibers, and in addition to being faster in the locking process, the friction between the screws 33 and the lock compound 4 during the locking process can be reduced, so that the locking is achieved. The locking torque and resistance in the process can be effectively reduced, and the locking is more labor-saving.

2. Anti-cracking material: Continuing the foregoing, in view of the arrangement of the notch 333 between the protruding tooth 332 and the cutting tooth 331, the chip obtained during the drilling can be effectively discharged by the cutting groove 333, thereby effectively increasing The locking efficiency and the locking resistance are reduced, so as to avoid the excessive swarf in the lock compound 4 and the outward expansion, thereby effectively preventing the cracking material from being generated, and at the same time, the partial swarf is left in the grooving 333. Therefore, the occurrence of skewing does not occur during the locking process, and the locking and positioning effect can be better.

3. The tightening force is increased: by providing at least one rib 322 on the rod body 32 and between the roots of the two threaded teeth 33, the rib 332 is assisted during the locking process. After the fiber of the lock compound 4 having the elastic restoring force is stretched, the rod body 32 is prevented from being hindered by the broken fiber winding, and the speed of the drill lock is affected, so that the rod body 32 is screwed in again. The fastening of the rod body 32 is carried out, which is advantageous for improving the locking stability of the locking fastener 3 and greatly increasing the fastening force.

In summary, the present invention has a different structural design with the cutting teeth and the convex teeth on the thread, and a setting of a slot provided between each of the protruding teeth and each of the teeth to make the locking The fastener has better drilling and cutting ability, so as to save labor and quickly lock into the lock compound, not only can reduce the friction and the resistance between the lock and the lock, but also use the slot to match the drill lock. The resulting chips are outward Discharging, not only does not cause a large amount of chips to accumulate, but also can effectively prevent the situation of cracked materials, and can effectively achieve the effect of stable fixed position, so it can really achieve the purpose of this new type.

However, the above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made in accordance with the scope of the present patent application and the contents of the new specification, All should remain within the scope of this new patent.

3‧‧‧Lock fasteners

31‧‧‧ screw head

32‧‧‧ rod body

33‧‧‧ threaded teeth

321‧‧‧Free end

331‧‧‧ teeth

332‧‧‧ convex teeth

333‧‧‧ slotting

3311‧‧‧chord face

3312‧‧‧ end face

3313‧‧‧ cutting edge

3321‧‧‧Inside

3322‧‧‧External section

3323‧‧‧End edge

4‧‧‧Lock compound

Claims (5)

A locking fastener comprising a screw head, a rod body extending outwardly from the screw head, and a thread provided on the rod body by a plurality of spiral rings; wherein the thread has a plurality of openings a cutting tooth, a convex tooth disposed between the two cutting teeth, and a slit disposed between each of the protruding teeth and each of the teeth; wherein each convex tooth protruding area is smaller than the total tooth area, At the same time, each of the convex teeth is disposed through the slit, so that each of the convex teeth is formed by an inner and outer cutting surface, and the inner and outer cutting surfaces are formed with an end edge; The tooth has a chord section extending outwardly from the inscribed surface, an end surface that is in contact with the chord section and is adjacent to the other tangential surface of the other dent, and a cutting edge that is connected by the chord plane and the end surface, And the aforementioned cutting teeth are arranged facing and arranged in the direction of the screw twist. According to the lock fastener of the first aspect of the patent application, a rib is protruded from the rod body and at least between the two screws. The lock fastener according to claim 2, wherein the ribs are inclined with respect to a center line of the rod body. The locking fastener of claim 1, wherein the protruding heights of the protruding teeth are smaller than the heights of the cutting teeth. The lock fastener according to claim 1, wherein the convex teeth are disposed toward and in a direction of the screw twist.