JPH06200666A - Lock - Google Patents

Abstract

PURPOSE:To make a lock burglarproof by a method wherein a ball or a pin made of highly strong material is provided traverse to a head part of a rotor equipped with a key hole, and drilling is made unworkable even though breaking by cutting is tried with a drill or the like to the lock. CONSTITUTION:A small hole 17 is provided traverse to a head part 4 of a rotor 2 equipped with a key hole 12 and a ball 14 or a pin made of highly strong material is fitted therein, and the rotor 2 is fitted into a lock main body 1 so that it can rotate freely. Then a bit of a drill can be prevented from reaching a pin tumbler even though breakage is tried by cutting with a drill or the like inserted from a key insert port 3. Thereby, illegal force unlock and can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for preventing violent and destructive unauthorized unlocking by a wrench or a drill.

[0002]

2. Description of the Related Art In a conventional lock device, a cutting edge of a drill is abutted against a key insertion opening of a rotor, and a large-diameter hole is formed in the rotor with the key hole as a center, whereby a locking means such as a pin tumbler or the like can be provided. Violent and destructive unauthorized unlocking is performed in which the rotor is unlocked from the lock body by destroying a part or dropping it into the large diameter hole.

[0003]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a locking device capable of accurately preventing violent and destructive unauthorized unlocking by a drill or the like.

[0004]

The lock device according to the present invention will be described below with reference to the reference numerals in the accompanying drawings, in which the head 4 of the rotor 2 equipped with locking means such as a pin tumbler is laterally moved. A small hole 17 is provided, a ball 14 or a pin 16 made of a high hardness material is fitted into the small hole 17, and the rotor 2 is rotatably accommodated in the lock body 1.

[0005]

In this lock device, when the drill is abutted against the key insertion opening 3 and rotated, the blade edge of the drill advances while destroying the head 4 of the rotor 2, but a ball 14 or a pin of high hardness is used. 1
When the edge of the drill reaches 6, the ball 14 or the pin 16 prevents the advance of the drill, the edge cannot reach the pin tumbler, and unauthorized unlocking is prevented.

[0006]

FIG. 1 shows an embodiment of the present invention. The rotor 2 rotatably housed in the large-diameter shaft hole 5 and the small-diameter shaft hole 6 of the lock body 1 is equipped with a locking means, and the head 4 including the key insertion opening 3 is perpendicular to the axial direction. A small hole 17 is provided.
The sphere 14 made of a high hardness material such as a stainless steel ball is fitted into the small hole 17. In order to surely fit the ball 14 into the small hole 17, the remaining space is provided with a plug 15 made of a high hardness material.

Small holes 17 are arbitrarily provided at several places on the rotor head 4 and the balls 14 are fitted therein, but they are always installed in front of the pin tumbler. A known pin tumbler structure is used as a locking means for the lock body 1 and the rotor 2, and the rotor body 2 is provided with sliding holes 9 for the driven pin 7 and the drive pin 8.
The drive pin 8 is slidably biased by the compression coil spring 11 inserted in the receiving hole 10 of the lock body 1, and the driven pin 7 has its tip abutted against the stop projection 13 formed in the key hole 12. .

In the lock device constructed as described above, when the drill blade tip is abutted against the key insertion opening 3 and rotated, the drill blade tip breaks the rotor head 4 and reaches the ball 14. Since the sphere 14 is made of a material that is sufficiently hard with respect to the material of the cutting edge of the drill, it prevents the movement of the cutting edge of the drill and eventually destroys the cutting edge, or diverts the course of the cutting edge,
Prevents access to the pin tumbler.

In the embodiment shown in FIG. 2, a pin 16 made of a high hardness material is fitted in a small hole 17 of the rotor head 4. In the locking device configured as described above, the movement of the drill cutting edge is blocked by the pin 16 as in the previous embodiment.

[0010]

As described above, in the lock device of the present invention, the head 4 of the rotor 2 equipped with the locking means is provided with the small hole 17 perpendicularly to the axial direction, and the small hole 17 has a high hardness. Since the sphere 14 and the pin 16 made of the material are fitted and the rotor 2 is rotatably accommodated in the lock body 1, when the rotor 2 is broken by a drill or the like and an illegal unlocking is attempted, a high hardness material is used. The ball 14 and the pin 16 prevent the advance of the drill or deviate the course of the drill, and the drill cutting edge cannot reach the pin tumbler.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a lock device according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a lock device according to another embodiment of the present invention.

[Explanation of symbols]

 1 Lock Main Body 2 Rotor 3 Key Insertion Port 4 Rotor Head 5 Large Diameter Shaft Hole 6 Small Diameter Shaft Hole 7 Driven Pin 8 Drive Pin 9 Sliding Hole 10 Receiving Hole 11 Compression Coil Spring 12 Key Hole 13 Stop Protrusion 14 Ball 15 Stopper 16 pin 17 Small hole

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[Procedure amendment]

[Submission date] February 16, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

Claims (1)

[Claims] A small hole 17 is provided laterally in the head 4 of the rotor 2 equipped with a locking means such as a pin tumbler, and a ball 14 or a pin 16 made of a high hardness material is fitted into the small hole 17. A lock device in which the rotor 2 is rotatably housed in a lock body 1.