CN2515445Y

CN2515445Y - Internal triangular screw

Info

Publication number: CN2515445Y
Application number: CN 01273047
Authority: CN
Inventors: 金湘彧; 赵杏根; 俞益民
Original assignee: Suzhou Samsung Electronics Co Ltd
Current assignee: Suzhou Samsung Electronics Co Ltd
Priority date: 2001-12-24
Filing date: 2001-12-24
Publication date: 2002-10-09
Anticipated expiration: 2011-12-24

Abstract

The utility model relates to an inner triangle bolt, which comprises a bolt tip [1], and a nail body [2] connected with the bolt tip [1], wherein the nail body [2] is equipped with screw threads, the bolt tip [1] is provided with an inner groove [3] on the end portion, the section of the inner groove [3] is a trilateral, each side of the trilateral is a circular arc of the same radian and length, intersection of each two sides of the trilateral is the center of circle of the other side. Due to the intersection of each two sides of the trilateral is the center of circle of the other side, general tools are either incapable of being inserted or incapable of being opened because of no origin of force after inserted, thereby the utility model can be opened only by special tools engaged with the trilateral.

Description

Interior triangle screw

Technical field

The utility model relates to a kind of screw.

Background technique

In the screw of the prior art, a kind of Y shape attachment screw is arranged, it is meant the instrument that obtains with common means, the connection that can't open as flat blade screwdriver, crosspoint tip screwdriver, needle-nose pliers, vice etc.At present, the screw of Y connection usefulness roughly has:

1, interior plum blossom screw referring to accompanying drawing 1 and accompanying drawing 2, is had no progeny middle duckpin sled with flat blade screwdriver, opens with regard to available flat blade screwdriver.

2, Y shape screw referring to accompanying drawing 3 and accompanying drawing 4, can be opened by force with flat blade screwdriver.

3, outer plum blossom screw referring to accompanying drawing 5 and accompanying drawing 6, can be opened with needle-nose pliers or vice.

Therefore existing Y shape attachment screw is not enough to prevent and illegally opens.

Summary of the invention

The purpose of this utility model is to provide a kind of interior triangle screw that can't open with general tools such as flat blade screwdrivers.

The technical solution of the utility model is: triangle screw in a kind of, comprise screw termination, the nail body that is connected with the screw termination, and described nail body is provided with screw thread, and the end on the described screw termination has inner groovy; The cross section of described inner groovy is a triangle, and each limit is the circular arc limit of identical radian measure, equal length, and the crosspoint on any two limits of described triangle is the center of circle on the 3rd limit on opposite.

The utility model compared with prior art has following advantage:

Because general tools such as the crosspoint on any two limits of triangle is the center of circle on the 3rd limit on opposite, flat blade screwdriver or can't insert, or insert the no Point of Strength in back and can't open, have only and use the special tool(s) that matches with its triangle just can open.

Description of drawings

Accompanying drawing 1 is the plan view of interior plum blossom screw;

Accompanying drawing 2 is the plan view of interior plum blossom screw;

Accompanying drawing 3 is the plan view of Y shape screw;

Accompanying drawing 4 is the plan view of Y shape screw;

Accompanying drawing 5 is the plan view of outer plum blossom screw;

Accompanying drawing 6 is the plan view of outer plum blossom screw;

Accompanying drawing 7 is a plan view of the present utility model;

Accompanying drawing 8 is a plan view of the present utility model; Wherein:

[1], screw termination; [2], nail body; [3], inner groovy;

Embodiment

Referring to accompanying drawing 7 and accompanying drawing 8, a kind of interior triangle screw comprises screw termination [1], the nail body [2] that is connected with screw termination [1], and described nail body [2] is provided with screw thread, and the end on the described screw termination [1] has inner groovy [3]; The cross section of described inner groovy [3] is triangle (seeing shown in the accompanying drawing 8), and each limit is the circular arc limit of identical radian measure, equal length, and the crosspoint on any two limits of described triangle is the center of circle on the 3rd limit on opposite.

Claims

1, a kind of interior triangle screw comprises screw termination [1], the nail body [2] that is connected with screw termination [1], and described nail body [2] is provided with screw thread, and the end on the described screw termination [1] has inner groovy [3]; It is characterized in that: the cross section of described inner groovy [3] is a triangle, and each limit is the circular arc limit of identical radian measure, equal length, and the crosspoint on any two limits of described triangle is the center of circle on the 3rd limit on opposite.