CN2926638Y - Safety screw - Google Patents

Abstract

The utility model provides an anti- unloading screw, consisting of a bolt and a screwdriver. The bolt is provided with an irregular end inner hole which is matched with a section shape of the screwdriver. The bolt is provided with a hexagonal inner hole and the screwdriver end is provided with a hexagonal section shape, or the bolt is provided with a quincuncial screwhead inner hole and the screwdriver has a quincuncial end section shape which is matched with the bolt. The screwhead of the anti- loading screw of the utility model is provided for professional maintenance persons, so, only the professional maintenance persons of the company can unload the screw, whereby better maintaining products, preventing products from being unloaded or stolen, and reducing economic losses.

Description

Tamper proof screws

[technical field]

The utility model relates to a kind of screw structural, particularly relates to a kind of tamper proof screws of dismantling can prevented.

[background technique]

See also Fig. 1, the retaining screw that uses in the building talkback all was to adopt to get normal screws shown in Fig. 1 in the past, when the building talkback product is installed in sub-district or other public areas, destroyed easily, because general personnel can directly take screw apart with very general Phillips screwdriver or straight screwdriver, destroy product, be unfavorable for the maintenance of product, simultaneously the easy stolen economic loss that causes of product.

[summary of the invention]

The purpose of this utility model is to provide a kind of tamper proof screws of dismantling can prevented.

For achieving the above object, the utility model provides a kind of tamper proof screws, comprises screw and screw-driver, and described screw has irregular termination endoporus, and the sectional shape of described screw-driver is corresponding with described termination endoporus.

The structure of this model utility can further be specially:

Described screw has the hex shape endoporus, and the termination of described screw-driver has hexagonal cross-sectional shape.

The termination sectional shape that perhaps described screw has the described screw-driver of screw terminal endoporus of plum blossom shape becomes and the corresponding plum blossom shape of screw, the one-body molded column of described screw terminal endoporus central authorities, the central corresponding described column of described driver tip is offered a through hole.

The advantage of the utility model tamper proof screws is: screw terminal adopts irregular shape, and the extracting tool of specialized maintenance personnel special use is given in outfit, therefore have only the specialized maintenance personnel of company can dismantle screw, better maintaining the building talkback product, make it be not easy to take apart or stolen, reduced economic loss, this tamper proof screws can be applicable to the fixing of other products equally.

[description of drawings]

In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings.

Fig. 1 is the structural representation of existing normal screws.

Fig. 2 is the utility model tamper proof screws first embodiment's a structural representation.

Fig. 3 is the utility model tamper proof screws second embodiment's a structural representation.

[embodiment]

Seeing also Fig. 1, is the utility model tamper proof screws first embodiment, comprises the screw-driver 2 that a termination with the screw 1 of hex shape endoporus and cooperation with it has hexagonal cross-sectional shape.

Have only the HEX HEAD CAP SCREWS cutter 2 that adopts this special use could inject the hexagon screw terminal of screw 1, thus the effect of playing set screw 1 or taking screw 1 apart.

Seeing also Fig. 2, is the utility model tamper proof screws second embodiment, comprises a screw 3 and a screw-driver 4.

This screw 3 has the screw terminal endoporus of plum blossom shape, this one-body molded column 32 of endoporus central authorities, the termination sectional shape of this screw-driver 4 also becomes and screw 3 corresponding plum blossom shapes, and the central authorities of termination offer a through hole 42, during use, behind the column 32 in through hole 42 alignment screw 3 of screw-driver 4, screw-driver 4 is inserted in the screw terminal endoporus of screw 3, both can fix or take apart this screw 3.

Therefore, design philosophy of the present utility model promptly is that screw termination bore design is become irregular geometrical shape, design the corresponding with it screw-driver of sectional shape then, have only and use this special screw-driver that is equipped with to insert in the endoporus of screw termination, could fix or take apart this screw, play the effect of anti-dismounting.

Claims (4)

1. a tamper proof screws comprises screw and screw-driver, it is characterized in that: described screw has irregular termination endoporus, and the sectional shape of described screw-driver is corresponding with described termination endoporus.

2. tamper proof screws as claimed in claim 1 is characterized in that: described screw has the hex shape endoporus, and the termination of described screw-driver has hexagonal cross-sectional shape.

3. tamper proof screws as claimed in claim 1 is characterized in that: described screw has the screw terminal endoporus of plum blossom shape, and the termination sectional shape of described screw-driver becomes and the corresponding plum blossom shape of screw.

4. tamper proof screws as claimed in claim 3 is characterized in that: the one-body molded column of described screw terminal endoporus central authorities, the central corresponding described column of described driver tip is offered a through hole.

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