Anti-slip self-tapping screw structure

Abstract

The utility model discloses an anti-slip self-tapping screw structure, which belongs to the technical field of hardware fasteners and comprises a screw body, a cross recess is arranged at the head of the screw body, a reserved groove is arranged at the bottom of the cross recess, and the cross recess and the reserved groove are separated by a fixed cross-shaped metal sheet. The screwdriver can extend into the reserved groove, and the reserved groove is also in a cross shape. The screw has the effects of being convenient and stable to screw and reducing slipping.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware fasteners, and more particularly to an anti-slip self-tapping screw structure. Background Art

[0002] Self-tapping screws are used for non-metal or softer metals. There is no need to drill a base hole or tap. Self-tapping screws have pointed heads so that they can "drill by themselves". The holes drilled by self-tapping screws do not require tapping. The screws used are different from ordinary ones. The head is pointed and the pitch of the teeth is relatively large. They can be screwed in directly without tapping. This method is commonly used for metals and plastics.

[0003] Self-tapping screws are also divided into four types according to the groove type: flat head type (also called slotted), cross head type, eleven-shaped composite head type, and Pozidriv head type. Among them, the cross head type has a wider range of applications. However, when the cross head type is screwed with a screwdriver, the inner edge of the slot head is often worn due to improper operation of the operator, resulting in slipping and even subsequent disassembly difficulties. Therefore, improvement is needed. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide an anti-slip self-tapping screw structure, which can facilitate screwing and reduce the slipping phenomenon.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions.

[0006] An anti-slip self-tapping screw structure includes a screw body, a cross slot is provided on the head of the screw body, a reserved slot is provided at the bottom of the cross slot, and the cross slot and the reserved slot are separated by a cross-shaped metal sheet. When a screwdriver is used to apply pressure to the damaged metal sheet, the screwdriver can be inserted into the reserved slot, which is also cross-shaped.

[0007] Furthermore, the metal sheet is bonded and fixed to the cross slot by adhesive.

[0008] Furthermore, four slots are evenly distributed around the head of the screw body.

[0009] Furthermore, each of the four slots is provided with a barb portion on the inner side thereof, and the provision of each barb portion facilitates the disassembly tool to be stuck when the screw body is disengaged outwards.

[0010] Furthermore, the head of the screw body includes a pressing plate and a regular hexagonal columnar head, the barb portion is arranged on the lower side of the pressing plate, and the cross slot is installed to the regular hexagonal columnar head.

[0011] Furthermore, the lower section of the pressing plate is also provided with a plurality of dot-shaped protrusions.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] 1. By providing a reserved groove and a metal sheet in the cross slot, when the inner end of the cross slot is damaged and slips, the user can press down the damaged metal sheet with force so that the screwdriver can extend downward, increasing the embedded contact area with the screw body, facilitating screwing, and reducing slipping. At the same time, the damaged metal sheet can also be filled between the screw and the cross slot and the reserved groove to increase the clamping force between the screwdriver and the screw body, further reducing slipping. This method can be used not only when the screw is damaged, but also when it is not worn. It is more flexible and can reduce the situation where the self-tapping screws are inconvenient to screw or disassemble.

[0014] 2. The arrangement of four slots and a regular hexagonal columnar head mainly facilitates the flexibility of disassembly of the self-tapping screws through other means. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A top view of a self-tapping screw according to an embodiment of the present application;

[0016] Figure 2 for Figure 1 AA cross-sectional diagram of .

[0017] Description of the numbers in the figure:

[0018] 1. Screw body; 2. Cross recess; 3. Reserved groove; 4. Metal sheet; 5. Slot; 6. Barb; 7. Clamping plate; 8. Regular hexagonal column; 9. Point-shaped protrusion. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Example:

[0021] See also Figure 1-2 A non-slip self-tapping screw structure includes a screw body 1, a cross slot 2 is provided on the head of the screw body 1, a reserved slot 3 is provided at the bottom of the cross slot 2, and the cross slot 2 and the reserved slot 3 are separated by a fixed cross-shaped metal sheet 4. When a screwdriver is used to apply pressure to the damaged metal sheet 4, the screwdriver can be inserted into the reserved slot 3, and the reserved slot 3 is also cross-shaped.

[0022] The metal sheet 4 is fixed to the cross slot 2 by adhesive. In this embodiment, the metal sheet 4 is made of aluminum alloy with a thickness of 0.5-1 mm.

[0023] Furthermore, four slots 5 are evenly distributed around the head of the screw body 1. The arrangement of the slots 5 facilitates the disassembly operation of the screw body 1 with the aid of other temporary tools.

[0024] Each slot 5 is provided with four notches and is further provided with a barb portion 6 on the inner side. The arrangement of each barb portion 6 facilitates the disassembly tool to be disengaged from the screw body 1. The disassembly tool can be clamped with scissors or other homemade tools to clamp two relative slots and then rotate to extract the screw body 1.

[0025] The head of the screw body 1 includes a pressing plate 7 and a regular hexagonal columnar head. The barb portion 6 is provided on the lower side of the pressing plate 7, and the cross slot 2 is mounted on the regular hexagonal columnar head.

[0026] The lower section of the pressing plate 7 is further provided with a plurality of dot-shaped protrusions 9 .

[0027] Working principle: Fix the cross piece into the cross slot 2. When the inner corner of the cross slot 2 is damaged and will slip, the user can press down the damaged metal piece 4 with force so that the screwdriver can extend downward, increase the embedded contact area with the screw body 1, facilitate screwing, and reduce slipping. At the same time, the damaged metal piece 4 can also be filled between the screw and the cross slot 2 and the reserved slot 3 to increase the clamping force between the screwdriver and the screw body 1, and further reduce slipping. The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited to this. Any technician familiar with this technical field, within the technical scope disclosed by this utility model, shall make equivalent replacements or changes based on the technical solution and its improved conception of the present utility model, which shall be covered by the protection scope of the present utility model.

Claims

1. An anti-slip self-tapping screw structure, comprising a screw body (1), characterized in that: The head of the screw body (1) is provided with a cross slot (2), the bottom of the cross slot (2) is provided with a reserved slot (3), the cross slot (2) and the reserved slot (3) are separated by a cross-shaped metal sheet (4), when a screwdriver is used to apply pressure to the damaged metal sheet (4), the screwdriver can be inserted into the reserved slot (3), and the reserved slot (3) is also cross-shaped.

2. The anti-slip self-tapping screw structure according to claim 1, characterized in that: The metal sheet (4) is fixed to the cross slot (2) by adhesive bonding.

3. The anti-slip self-tapping screw structure according to claim 1, characterized in that: Four slots (5) are evenly distributed around the head of the screw body (1).

4. The anti-slip self-tapping screw structure according to claim 3, characterized in that: Each of the slots (5) is configured as four slots, and a barb portion (6) is further provided on the inner side of each of the slots. The provision of each barb portion (6) facilitates the disassembly tool to be disengaged from the screw body (1) when it is stuck.

5. The anti-slip self-tapping screw structure according to claim 4, characterized in that: The head of the screw body (1) comprises a pressing plate (7) and a regular hexagonal columnar head, the barb portion (6) is arranged on the lower side of the pressing plate (7), and the cross slot (2) is mounted on the regular hexagonal columnar head.

6. The anti-slip self-tapping screw structure according to claim 5, characterized in that: The lower section of the pressing plate (7) is also provided with a plurality of dot-shaped protrusions (9).

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