CN204213136U - A kind of anti-theft screw - Google Patents

Abstract

The utility model relates to an anti-theft screw, which mainly includes a terminal head and a screw rod. An eccentric hole is arranged at a position eccentric to the axis of the terminal head. The terminal head has a hemispherical structure. A limit rod is arranged inside, and the limit rod and the trapezoidal eccentric hole can be arranged at different positions of the anti-theft screw. The beneficial effects of the utility model are: when using the utility model, a special adapter paired with the trapezoidal eccentric hole and the limit rod must be used to disassemble the screw, and the screw cannot be turned without the special paired adapter. So as to achieve the effect of anti-theft.

Description

anti-theft screw

technical field

The utility model belongs to fasteners on outdoor easy-to-dismantle and easy-to-steal equipment and facilities. Specifically, it is an anti-theft screw that can only be disassembled and assembled by using a special matching tool.

Background technique

Ordinary screws, bolts, etc. are made of regular structures such as flat, cross, and hexagonal. They are easy to be twisted by conventional tools, so they do not have anti-dismantle and anti-theft functions. Even some non-standard custom-made screws, because the screw ends There are a corresponding number of regular shapes on the outside, or two or more capping holes are used at the end. Although such screws can prevent some conventional tools, such screws only need to make some very simple hand tools or use pliers. Needle-nose pliers and the like can be used to turn the thread, which does not have a real anti-theft effect.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies in the prior art and provide a anti-theft screw with simple structure, easy manufacture and reliable anti-theft.

The purpose of this utility model is accomplished through the following technical solutions. This kind of anti-theft screw mainly includes a head and a screw rod, and an eccentric hole is provided at a position eccentric to the axis of the head. . The section of the eccentric hole is trapezoidal, and a limit rod is arranged in the eccentric hole, and the limit rod and the trapezoidal eccentric hole can be arranged at different positions of the anti-theft screw.

The cross-section of the eccentric hole is a trapezoidal structure with a long side near the upper surface of the end head and a short side far away from the upper surface of the end head.

The eccentric hole is provided with different eccentric radii according to the size of the anti-theft screw.

The beneficial effects of the utility model are: when using the utility model, the special adapter paired with the trapezoidal eccentric hole and the limit rod must be used to disassemble the screw, and the screw cannot be turned without the special paired adapter. So as to achieve the effect of anti-theft.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 2 is the top view of the hemispherical end of the utility model;

Fig. 3 is the front structural diagram of the utility model;

Fig. 4 is a schematic cross-sectional structure diagram of the utility model.

The labels in the accompanying drawings are respectively: end 101 , screw rod 102 , eccentric hole 103 , and limit rod 104 .

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings:

As shown in Figures 1-4, this anti-theft screw mainly includes a head 101 and a screw rod 102. The head 101 is a hemispherical structure, and an eccentric hole 103 is provided at a position eccentric to the axis of the head 101. The eccentric hole 103 is provided with different eccentric radii according to the size of the anti-theft screw. The cross-section of the eccentric hole 103 is a trapezoidal structure with a long side near the upper surface of the end head 101 and a short side far from the upper surface of the end head 101 . A limiting rod 104 is arranged in the eccentric hole 103 .

The limiting rod and the trapezoidal eccentric hole can be arranged at different positions of the anti-theft screw, thereby deriving different types of anti-theft screws. The design of the hemispherical end can prevent conventional tools such as pliers from forcibly dismantling, and the limit rod in the trapezoidal eccentric hole can prevent slender tools such as needle-nose pliers from penetrating into the trapezoidal eccentric hole to forcefully unscrew the screw.

The utility model is not limited to the above-mentioned embodiments, regardless of any changes in its shape or material composition, any structural design provided by the utility model is a deformation of the utility model, and should be considered as a modification of the utility model. within the scope of protection.

Claims (3)

1. an anti-theft screw, mainly comprise termination (101) and lead screw (102), it is characterized in that: with the position of termination (101) eccentric axis on be provided with eccentric opening (103), this termination (101) is hemispherical dome structure, the cross section of this eccentric opening (103) is trapezoidal, is provided with position-limited lever (104) in eccentric opening (103).

2. anti-theft screw according to claim 1, it is characterized in that: the cross section of described eccentric opening (103), for being long limit near termination (101) upper surface place, is the trapezium structure of minor face away from termination (101) upper surface place.

3. anti-theft screw according to claim 1 and 2, is characterized in that: described eccentric opening (103), according to the size of described anti-theft screw, arranges different eccentric arms.