TWM613314U - Cap head structure of flat head screw - Google Patents

Abstract

A flat head screw cap head structure is used to solve the problem that the screw head of the conventional flat head screw is difficult to drill into the working surface and the debris remains between the periphery of the screw head and the working surface. The system includes: a rod body with a tapered portion at one end, at least one thread starts from the tapered portion, is continuously wound and protrudes on the outer surface of the rod body; and a cap head with an opposite drive Side and a connecting side, the connecting side is connected to the other end of the rod body, the cap head is gradually reduced in diameter from the driving side to the connecting side to form a tapered surface, the tapered surface is provided with a plurality of grooves at intervals The tapered surface further has a plurality of cutting ribs, and each of the cutting ribs protrudes from the tapered surface.

Description

Cap head structure of flat head screw

This creation is about a flat head screw, especially the cap head structure of a flat head screw.

The conventional flat head screw, because the screw head after locking can be flush with the working surface, so that the screw head will not bulge and interfere with the action of the mechanical parts, and can keep the surface of the object flat and increase the beauty, so it is often used in Lock wooden workpieces. In order to allow the screw head to drill a space at the drill lock of the wooden workpiece, so that the screw head can sink into the working surface, the bottom side of the screw head is usually provided with several cutting ribs, thereby securing The drill lock can be cut to form a pocket for accommodating the screw head.

In the above-mentioned conventional flat-head screw, since the cutting rib cuts out the pocket during the process of cutting out the pocket, when the chip accumulates in the pocket, resistance will be generated, which will make it difficult for the screw head to drill into the working surface. And after the debris in the pocket is squeezed by the screw head, the debris remains between the periphery of the screw head and the working surface, resulting in the failure to maintain flatness and aesthetics between the flat head screw and the locking surface .

In view of this, there is indeed a need to improve the conventional flat head screws.

In order to solve the above problems, the purpose of this creation is to provide a flat head screw cap head structure, which can reduce the drill lock resistance of the screw head.

The second purpose of this creation is to provide a flat head screw cap head structure. After the flat head screw is drilled and locked, the cap head and the locking surface can form a flat and better appearance.

The elements and components described in the full text of this creation use the quantifiers of "one" or "one", which is only for the convenience of use and provides the usual meaning of the scope of this creation; in this creation, it should be interpreted as including one or at least one, and single The concept of also includes the plural, unless it clearly implies other meanings.

The approximate terms such as "combination", "combination" or "assembly" mentioned in the full text of this creation mainly include the types that can be separated without destroying the components after being connected, or the components cannot be separated after being connected, and they have common knowledge in the field. Those can be selected based on the materials of the components to be connected or assembly requirements.

The cap head structure of the flat head screw of this creation includes: a rod body with a taper at one end, at least one thread starts from the taper, and is continuously wound and protrudes on the outer surface of the rod; and A cap head has a driving side and a connecting side opposite to each other. The connecting side is connected to the other end of the rod. The cap head gradually shrinks from the driving side to the connecting side to form a tapered surface. A plurality of grooves are arranged on the shaped surface at intervals, and the tapered surface is further provided with a plurality of cutting ribs, and each of the cutting ribs protrudes from the tapered surface.

Accordingly, the cap head structure of the flat head screw of the present creation, by arranging the groove on the tapered surface of the cap head, enables the groove to contain the debris formed by the cutting rib cutting the drill lock. This can reduce the resistance caused by the accumulation of debris, so that the head can easily drill into the working surface, and can prevent the debris from protruding out of the working surface, and maintain the flatness and aesthetics of the working surface The effect of.

Wherein, the part of the rod adjacent to the tip of the cone may have a cutting part. In this way, the system has the effect of destroying the internal structure of the object to be locked.

Wherein, the rod body is provided with a first thread, and the first thread starts from the taper portion of the rod body and spirally surrounds the cap head, and the first thread may have a plurality of screw tips. So, the first The thread can provide strong cutting force and destructive force, which has the effect of improving the efficiency of tapping and drilling.

Wherein, there may be a plurality of chip flutes between the threads in the first thread, and the chip flutes are surrounded in a continuous spiral and recessed on the outer surface of the rod. In this way, the scrap materials generated during the tapping and drilling process can be discharged in the direction of the cap head, which has the effect of discharging the scrap materials.

Wherein, the tip portion of the rod adjacent to the tapered portion may have a cutting portion, and the chip flute may be communicated with the cutting portion. In this way, it has the effect of guiding the scrap material in the cutting part into the chip flute.

Wherein, the rod body may have a second thread, and the second thread is connected to the tail end of the first thread and continues to spirally surround the head of the cap, and the thread height of the second thread is the same. In this way, the second thread can provide sufficient tensile strength, and has the effect of enabling the screw to be more firmly combined with the object to be locked.

Wherein, each of the cutting ribs may be adjacent to one of the longitudinal sides of each of the grooves. In this way, the chips formed by the cutting ribs can quickly enter the groove.

Wherein, each of the cutting ribs may be adjacent to one of the longitudinal sides of each of the grooves. In this way, the debris cut by the cutting rib can directly enter the groove, which has the effect of increasing the debris collection rate of the groove.

Wherein, each of the cutting ribs and the groove are connected to form a cutting surface, and the radial direction of the cutting surface and the cap head can be parallel. In this way, the cutting force of the cutting rib can be strengthened, and the tapping efficiency of the cap head can be improved.

Wherein, each of the grooves has two opposite longitudinal first and second sides, and the depth of each of the grooves can be gradually deepened from the second side to the first side. In this way, the groove has the function of accommodating debris.

Wherein, each of the grooves has two opposite longitudinal sides, and the depth of each of the grooves 24 between the two longitudinal sides can be equal. In this way, the groove system can have a larger accommodating space, with It has the effect of accommodating more debris and making the debris more evenly distributed.

[This creation]

1: Rod body

11: Cone

12: Cutting part

13a: first thread

13b: second thread

13: Thread

14: Chip flute

2: hat head

21: Drive side

22: connection side

23: tapered surface

24: Groove

25: cutting rib

26: Cutting surface

D: Crumbs

E: Longitudinal side

E1: First side

E2: second side

P: Tip

R: Rotation direction

T: the top of the thread

[Figure 1] A three-dimensional view of the first embodiment of this creation.

[Figure 2] A side view of the first embodiment of this creation.

[Figure 3] A cross-sectional view along the line A-A in Figure 2.

[Figure 4] A perspective view of the second embodiment of this creation.

[Figure 5] A side view of the second embodiment of this creation.

[Figure 6] A cross-sectional view along the line B-B in Figure 5.

In order to make the above and other purposes, features and advantages of this creation more obvious and easy to understand, the following is a detailed description of the preferred embodiments of this creation, together with the accompanying drawings: Please refer to Figures 1 and 2 As shown, it is the first embodiment of the present creation, and it includes a rod body 1 and a hat head 2, and the hat head 2 is connected to the rod body 1.

The rod 1 has a taper 11 at one end, and the tip P of the taper 11 is the terminal end of the rod 1. The rod 1 may preferably have a cutting portion 12 at a portion adjacent to the tip P. The system can be used to destroy the internal structure of the locked object to facilitate the screw drill lock.

The rod body 1 has at least one thread 13 which is used to cut and destroy the fiber or structure of the locked object, and provide a tensile force after the locked object is locked to prevent the screw from loosening. The at least one thread 13 starts from the taper portion 11 of the rod body 1, is continuously wound and protrudes on the outer surface of the rod body 1.

Preferably, the thread 13 has a first thread 13a and a second thread 13b, The first thread 13a and the second thread 13b are continuously wound and protrude on the outer surface of the rod body 1. The first thread 13a starts from the taper portion 11 of the rod body 1 and spirally surrounds the cap head 2. The thread of the first thread 13a may have a plurality of relatively protruding thread tops T, so that the first thread 13a A thread 13a can provide strong cutting force and destructive force; the second thread 13b can be connected to the tail end of the first thread 13a, and continue to spiral around the cap head 2, the thread height of the second thread 13b It can be the same height, and the system can provide tensile strength, so that the screw can be more firmly combined with the object to be locked.

Preferably, there may be a plurality of chip flutes 14 between the threads of the first thread 13a, and the chip flutes 14 are surrounded in a continuous spiral and are recessed on the outer surface of the rod body 1, by Therefore, the chip flute 14 can discharge the debris generated during the tapping process toward the head 2. Preferably, the chip flute 14 can be communicated with the cutting portion 12 to guide the scrap material in the cutting portion 12 into the chip flute 14.

The cap head 2 has a driving side 21 and a connecting side 22 opposite to each other. The driving side 21 is used for the user to turn the screw with a tool. The driving side 21 can have a conventional slot, cross slot, and hexagonal slot. Or star-shaped trough, etc., those with ordinary knowledge in the field can choose according to their needs, and this creation is not limited. The connecting side 22 is connected to the other end of the rod body 1, and the cap head 2 is gradually reduced in diameter from the driving side 21 to the connecting side 22 to form a tapered surface 23. The tapered surface 23 has a plurality of grooves 24 The plurality of grooves 24 are arranged on the tapered surface 23 at intervals, and the plurality of grooves 24 can be used to contain the debris generated during the drilling and locking process. The tapered surface 23 further has a plurality of cutting ribs 25, each of the cutting ribs 25 protruding from the tapered surface 23, each of the cutting ribs 25 may be adjacent to or adjacent to a longitudinal side E of each of the grooves 24, so that the cutting The chips formed by cutting the rib 25 can quickly enter the groove 24.

Please refer to Figures 1 to 3, this creation does not limit the shape of each groove 24. In this embodiment, each groove 24 has two opposite longitudinal first sides E1 and second sides E2. The cutting rib 25 is adjacent to the first side E1, so that the chips cut by the cutting rib 25 can directly enter the groove 24, which can increase the chip collection rate of the groove 24. Moreover, the depth of each of the grooves 24 The degree can be gradually deepened from the second side E2 to the first side E1 to form an accommodating space. Each of the cutting ribs 25 and the groove 24 forms a cutting surface 26, preferably, the cutting surface 26 and the cap head 2 can be formed parallel to the radial direction, thereby strengthening the cutting force of the cutting rib 25 , Thereby improving the tapping efficiency of the hat head 2.

When the cap head structure of the flat head screw of this creation is actually used, the tip P can be used to form an initial hole on the working surface of the object to be locked, and the cap head structure of the flat head screw can be rotated along a rotation direction R. Into the locked object, in the process of tapping and drilling, the cutting part 12 can dig the locked object and destroy the internal structure of the locked object, so as to expand the hole so that the cap head 2 can be locked more easily. Into. The first thread 13a can provide strong cutting force and destructive force, so that the tapping efficiency of the flat head screw of the invention is improved. Then the chip flute 14 will move the debris generated during the tapping process toward the cap. The direction of the head 2 is led out to avoid the accumulation of debris and the generation of drilling resistance. After the flat head screw of the present creation is locked, the second thread 13b can provide sufficient tensile strength, so that the flat head screw can be more firmly combined with the object to be locked, so that the flat head screw has both quick tapping and drilling and The advantage of high tensile strength.

When the flat head screw continues to tap and drill, and the cap head 2 contacts the object to be locked, the cutting rib 25 can cut a space at the drill lock of the object to be locked, so that the cap head 2 can be drilled into the work The chip D formed by cutting the drill lock on the cutting rib 25 can be accommodated in the groove 24, thereby reducing the resistance generated by the accumulation of the chip D, so that the cap head 2 can be easily The ground drills into the working surface, and can greatly reduce the debris D protruding from the working surface due to the squeezing of the cap head 2, which helps to maintain the flatness and aesthetics of the working surface.

Please refer to Figures 4 to 6, which is the second embodiment of this creation. Compared with the first embodiment, in this embodiment, each of the grooves 24 is formed on the first side E1 and the second side. The depths between the sides E2 can be equal. In this way, the groove 24 can have a larger accommodating space to accommodate more debris D, and the debris D can also be more evenly distributed on the The groove 24 is used to reduce the accumulation of debris D to form resistance.

In summary, during the tapping and drilling process of the flat head screw of the invention, the first thread can provide strong cutting force and destructive force, and the second thread can provide sufficient tensile force to make the flat head screw double It has fast tapping and drilling speed and high tensile strength. Moreover, by arranging the groove on the cap head, the chips formed by the cutting of the drill lock by the cutting ribs can be accommodated, thereby reducing the resistance generated by the accumulation of the chips and enabling the cap head to be able to It is easy to drill into the working surface, and can greatly reduce the debris protruding from the working surface, and has the effect of maintaining the flatness and aesthetics of the working surface.

Although this creation has been disclosed using the above-mentioned preferred embodiment, it is not intended to limit this creation. Anyone who is familiar with this technique does not depart from the spirit and scope of this creation and makes various changes and modifications relative to the above-mentioned embodiment. The technical scope of the creation is protected. Therefore, the scope of protection of this creation shall be subject to the scope of the attached patent application.

1: Rod body

11: Cone

12: Cutting part

13a: first thread

13b: second thread

13: Thread

14: Chip flute

2: hat head

21: Drive side

22: connection side

23: tapered surface

24: Groove

25: cutting rib

26: Cutting surface

E: Longitudinal side

E1: First side

E2: second side

P: Tip

T: the top of the thread

Claims (11)

A cap head structure of a flat head screw, comprising: a rod body with a taper portion at one end, at least one thread starts from the taper portion, is continuously wound and protrudes on the outer surface of the rod body; and a cap The head has a driving side and a connecting side opposite to each other. The connecting side is connected to the other end of the rod body. The cap head gradually shrinks from the driving side to the connecting side to form a tapered surface. A number of grooves are arranged in the spacer ring, and the tapered surface is further provided with a number of cutting ribs, and each of the cutting ribs protrudes from the tapered surface. Such as the cap head structure of the flat head screw of claim 1, wherein the part of the rod adjacent to the tip of the cone has a cutting part. For example, the cap head structure of the flat head screw of claim 1, wherein the rod body has a first thread, the first thread starts from the taper portion of the rod body and spirally surrounds the cap head, and the first thread has a number The top of the screw teeth. For example, the cap head structure of the flat head screw of claim 3, wherein a plurality of chip flutes are formed between each thread in the first thread, and the chip flutes are surrounded in a continuous spiral and recessed on the outer surface of the rod. Such as the cap head structure of the flat head screw of claim 4, wherein the tip portion of the rod body adjacent to the taper portion has a cutting portion, and the chip flute is communicated with the cutting portion. For example, the cap head structure of the flat head screw of claim 3, wherein the rod body has a second thread, the second thread is connected to the end of the first thread, and continues to spirally surround the cap head, the second thread The thread height of the thread is equal. Such as the cap head structure of the flat head screw of claim 1, wherein each of the cutting ribs is adjacent to one of the longitudinal sides of each of the grooves. Such as the cap head structure of the flat head screw of claim 1, wherein each of the cutting ribs is adjacent to one of the longitudinal sides of each of the grooves. For example, the cap head structure of the flat head screw of claim 8, wherein each of the cutting ribs and the groove forms a cutting surface, and the cutting surface is parallel to the radial direction of the cap head. For example, the cap head structure of the flat head screw of claim 1, wherein each of the grooves has two opposite longitudinal first and second sides, and the depth of each groove is from the second side to the first Gradually deepen on one side. For example, the cap head structure of the flat head screw of claim 1, wherein each of the grooves has two opposite longitudinal sides, and the depth of each groove between the two longitudinal sides is equal.

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