Double-thread anti-falling self-tapping screw

Abstract

The utility model relates to the technical field of fasteners, in particular to a double-thread anti-falling self-tapping screw which comprises a lower bolt body and an upper bolt body, a lower conical tail and an upper conical tail are arranged at the top ends of the lower bolt body and the upper bolt body respectively, a middle pan head is arranged between the lower bolt body and the upper bolt body, and lower pricking needles and upper pricking needles which are evenly distributed are arranged at the upper end and the lower end of the middle pan head. Meanwhile, the outer ring is further provided with a rotating handle, so that locking and dismounting are convenient. The utility model has the advantages that: 1, the upper and lower screws can provide needle insertion, so that the needle is prevented from falling off all the time; secondly, a rotary handle is arranged, so that locking and dismounting are facilitated; and thirdly, the structure is simple, and the manufacturing cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a double-threaded anti-falling self-tapping screw. Background Art

[0002] A double-thread self-tapping screw is a screw with threads on both ends. It is usually used to install equipment, accessories, etc. One end is screwed into the main body, and after the accessories are installed, a nut is installed on the other end to fix it. Since the accessories are disassembled more often than the main body, it is very convenient to replace them with double-threaded bolts. They are also used when the thickness of the connecting body is large and a longer bolt length is required. The existing bolt part and the screw part are only locked by elastic pads to adjust the length of the connection, which results in poor stability of the connection between the bolt part and the screw part, and the screw installation is not firm. Therefore, we propose a double-threaded anti-fall-off self-tapping screw. Utility Model Content

[0003] The utility model aims to provide a double-threaded anti-falling self-tapping screw to solve the problems existing in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-headed anti-falling self-tapping screw, comprising a lower bolt body 2 and an upper bolt body 7, and a lower cone tail 1 and an upper cone tail 8 are respectively provided at the top, characterized in that an intermediate pan head 3 is provided between the lower bolt body 2 and the upper bolt body 7, and lower and upper ends of the intermediate pan head 3 are provided with evenly distributed lower puncture needles 4 and upper puncture needles 6.

[0005] Preferably, the outer circumference of the middle disk head 3 is provided with four evenly distributed rotating handles 5 .

[0006] Preferably, there are six lower needles 4 and six upper needles 6, which are arranged alternately up and down.

[0007] Preferably, the rotating handle 5 is cylindrical and connected to the middle disc head 3 via a latch or a thread.

[0008] Compared with the prior art, the utility model has the following beneficial effects: first, both the upper and lower screws can provide needle insertion and prevent falling off at all times; second, a rotating handle is provided to facilitate locking and disassembly; third, the structure is simple and the manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model.

[0010] In the figure: 1. lower cone tail; 2. lower bolt body; 3. middle pan head; 4. lower puncture needle; 5. turning handle; 6. upper puncture needle; 7. upper bolt body; 8. upper cone tail. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0012] See also Figure 1 The utility model provides a technical solution: a double-headed anti-falling self-tapping screw, comprising a lower bolt body 2 and an upper bolt body 7, and a lower cone tail 1 and an upper cone tail 8 are respectively provided at the top, and the characteristic is that an intermediate pan head 3 is provided between the lower bolt body 2 and the upper bolt body 7, and the outer circle of the intermediate pan head 3 is provided with four evenly distributed rotating handles 5, which can be conveniently locked and disassembled, and can be inserted into a crowbar, and the rotating handle 5 is cylindrical and connected to the intermediate pan head 3 by a pin or a thread. After being fixed, the rotating handle 5 can be taken out to save space.

[0013] The upper and lower ends of the middle disk head 3 are provided with evenly distributed lower puncture needles 4 and upper puncture needles 6. There are six lower puncture needles 4 and six upper puncture needles 6, which are staggered up and down to avoid falling off.

[0014] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-threaded anti-dropping self-tapping screw, comprising a lower bolt body (2) and an upper bolt body (7), and having a lower cone tail (1) and an upper cone tail (8) at the top, characterized in that: An intermediate disk head (3) is provided between the lower bolt body (2) and the upper bolt body (7), and evenly distributed lower puncture needles (4) and upper puncture needles (6) are provided at the upper and lower ends of the intermediate disk head (3).

2. A double-threaded anti-falling self-tapping screw according to claim 1, characterized in that: The outer circumference of the middle disk head (3) is provided with four evenly distributed rotating handles (5).

3. A double-threaded anti-falling self-tapping screw according to claim 1, characterized in that: There are six lower puncture needles (4) and six upper puncture needles (6), which are arranged in an alternating manner up and down.

4. A double-threaded anti-falling self-tapping screw according to claim 2, characterized in that: The rotating handle (5) is cylindrical and is connected to the middle disk head (3) via a latch or a thread.

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