WO1996018012A1

WO1996018012A1 - An anti-pick device for lock

Info

Publication number: WO1996018012A1
Application number: PCT/CN1995/000095
Authority: WO
Inventors: Hsiaobei Wang
Original assignee: Hsiaobei Wang
Priority date: 1994-12-05
Filing date: 1995-12-05
Publication date: 1996-06-13
Also published as: AU4113896A

Abstract

An anti-pick device for lock (10) consists of a keyhole protective shield (20), on the upper portion of which is formed a keyhole (23), a protective wall (22) surrounds the keyhole (23), a receiving arched plate (24) extends from the opening end of the wall (22), on the base of the main body (21) of the shield (20) there is an opening (28), the inner wall surface of the body (21) is provided with a shutter (30) near the keyhole (23), the shutter (30) consists of an L-shaped fixing plate (31), which is fixed onto the inner wall surface of the main body (21), a pivot pin (32) is secured to the plate (31), the pin (32) is provided with a torsing spring (33) and a closure flap (34).

Description

Anti-theft keyhole cover Technical field

The present invention relates to an anti-theft lock, and in particular, a cover is provided outside the keyhole for covering the keyhole to prevent a thief from unlocking.

Background of the invention

Conventional lock designs are designed to expose the keyhole of the lock outside the door so that people can use the key to open the door. Therefore, thieves can easily unlock and intrude. Smart locksmiths and thieves can use a thin strip tool (commonly known as a master key) to open a universal door lock in about five seconds. Even complex locks can be opened in half an hour. So all kinds of valuable locks are actually not safe.

There are five reasons why the thief can easily unlock the lock:

① 镄 is made by man, and of course he can open the lock made by man.

② The thief has good skills in unlocking. He is familiar with the structure of various locks.

③ Most thieves have thin bar tools, which are enough for unlocking.

④The thief can see the keyhole of the lock, so he can infer the structure of the lock, and select a number of thin tools that can be used. After inserting the twist, the lock can be unlocked.

⑤ When the thief tried to unlock the door, there was no restriction or obstruction except that he could not make a loud sound. Therefore, he could easily get it.

In view of the lack of the above locks, in the pursuit of ideals, practicality and progress, the construction of special anti-theft locks has become a goal to be pursued in pursuit of improvement!

In view of this, the inventor of this case has thought through the development experience, and after several trials and trials, the invention of this invention was born.

Object of the invention

The main object of the present invention is to provide an anti-theft lock with a shield, which is fixed to a door by a shield. The shield shields and protects the keyhole of the lock, making the thief invisible and extremely difficult to contact. To the keyhole.

A secondary object of the present invention is to provide an anti-theft keyhole shield, in which one or more bells are fixed on the shielding sheet. When the shielding sheet is slightly vibrated, the bell will sound a bell to warn the owner. And increase The thief's fear when unlocking.

SUMMARY OF THE INVENTION

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. However, the drawings are for reference and description only, and are not intended to limit the present invention in any way. System. The related drawings are:

FIG. 1 is a perspective view of a first preferred embodiment of the present invention;

FIG. 2 is a sectional view taken along line 2-2 in FIG. 1;

FIG. 2A shows a partial perspective view of the cover door assembly;

FIG. 3 is a schematic diagram showing a use state of the present invention;

Figure 4 shows a perspective view of a long-handle key;

5 is a perspective view of a second preferred embodiment of the present invention;

Figure 6 is a sectional view taken along line 6-6 in Figure 5;

FIG. 7 is a schematic diagram showing that the key is to be inserted into the shield; and

Figure 8 shows the key with the shield inserted.

The best embodiment one:

Please refer to FIG. 1, FIG. 2, FIG. 2 A and FIG. 3, which can be seen from these figures. The anti-theft lock hole cover 10 of the present invention is a cover 20 and a cover door assembly 3 0.

Among them, a lock hole 23 is provided above the body 21 of the shield 20, and a protective wall 22 is extended around the lock hole 23, and its function is to reduce the operating space around the lock hole 23. An accommodating arc piece 2 4 is extended at the open end of the parapet wall 2 2, and its function is an operation space that can accommodate fingers when unlocking. A shielding door assembly 30 is provided on the inner wall surface of the body 21 near the keyhole 23. Please refer to FIG. 2A at the same time. The L-shaped fixing piece 3 1 of the shielding door assembly 30 is fixed to the body 2 1 On the inner wall surface, a fixing 扦 3 2 is fixed on the L-shaped fixing piece 31. An elastic element 3 3 and a blocking piece 3 4 are provided on the fixing piece 32, and a back piece of the blocking piece 3 4 is provided with Bell element 3 5. An opening 2 8 is provided at the bottom of the body 2 1, and a wing portion 2 6 is extended on each side of the body 2. The wing portion 2 6 is clamped on the outer wall surface of the lock 27, and the wing portion is welded or glued. 26 and the outer wall surface of the lock 27 are fixedly connected together, and the lock hole 23 and the lock core hole 29 of the lock 27 are located on the same central axis.

Please refer to FIG. 4 at the same time. A long handle key 2 5 that can be inserted into the above-mentioned keyhole 23 is provided. The key teeth 2 5 1 and the positioning protrusion 2 5 2 of the long handle key 2 5 have the same design as the conventional structure. The only difference is that a round shaft 2 5 4 'is provided between the positioning protrusion 2 5 2 and the key handle 2 5 3. The diameter of the round shaft 2 5 is slightly smaller than the hole diameter of the keyhole 23, and its length must be slightly longer than that of the lock. The distance from the hole 23 to the opening 28 'and the total length of the long-handed key 25 must be slightly shorter than the distance from the opening 28 to the outermost end of the receiving arc 24 to open the door with the long-handed key. When the long handle key 2 5 is inserted into the lock hole 23, the shutter 3 4 can be pushed away at the same time, and at the same time, the bell element 35 can be sounded. 'When the shutter 2 4 is pushed to an appropriate angle, such as As shown by the dashed line in FIG. 2, the key 2 5 can be inserted into the keyhole 2 9. Turn the key handle 2 5 3 with the finger and thumb to open the lock. Best embodiment two ...

Please refer to FIG. 5, FIG. 6, FIG. 7, and FIG. 8. The structure is substantially the same as that of the first embodiment, except that the cover door assembly 40 is provided on both sides of the lock hole 54 and the surface is fixed at The inner wall surface of the body 51 is provided with four skirts 5 2 at the bottom of the body 51, and a hole 5 3 is provided in the skirt 5 2 for the screw body 5 7 to pass through the hole 5 3 and the door 6 The through hole 6 1 of 0 is screwed together with a screw cap 62 and the screw body 57, so that the shield 50 of the present invention is fixed at the lock position of the door 60,

When the long handle key 2 5 is inserted into the lock hole 5 4, the two baffles 41 can be pushed away at the same time, and the bell element 4 2 can be sounded at the same time. When the baffle 41 is pushed to an appropriate angle, As shown in FIG. 7 and FIG. 8, the key 25 can be inserted into the lock hole 54 to the key hole 56, and the lock can be opened.

Furthermore, the interior of the shields 20 and 50 of the present invention can be painted (or plated) in black or dark color. It is not reflective at all, so the reflection of the keyholes 2 9 and 5 6 can be greatly reduced, and Prevent the thief from seeing the location and structure of the keyhole.

And because the present invention is made entirely of metal materials, if a thief uses tools such as saws, hammers, hydrogen and oxygen, and blowpipes to destroy them, they will make a loud noise and startle neighbors. Furthermore, the back of the baffle plates 3 4 and 41 of the present invention are provided with a bell block element. If a thief uses a universal key to open the lock core, but cannot find the position of the key hole in a short time, the bell element 3 5, 4 2—Ringing the bell continuously, the bell will make the thief feel fear when unlocking, and give up stealing behavior.

The following are the steps for unlocking the door lock of the present invention:

First insert the long-handle key obliquely through the keyhole, and push the front end of the key to open the baffle, so that the long-hand key key handle 2 5 3 is moved into the receiving arc 2 4. At the same time, the front end of the key is pushed forward and inserted Inside the lock, turn the key to unlock it. If you want to withdraw the long handle key, reverse the order.

Advantages and effects of the invention

If the thief unlocks with a thin strip tool, he will encounter the following difficulties:

① The lock core holes 2 9 and 5 6 are not visible, so it is extremely difficult for a thief to judge the internal structure of the lock core. Therefore, it is impossible to use a thin strip tool suitable for pulling the lock core structure.

② If you use a small mirror to look at the keyhole in the containing arc, your sight will be blocked by the baffle, and it is still difficult to see the keyhole.

③ If you use a thin strip tool to push open the flap, it may be difficult to push it away. Because the thrust of the bomb element is very strong, the thin metal bar cannot push several flaps. If you can push and insert it, it will be bent by the flap. .

④ If you use a slightly thick metal bar to insert the keyhole, you must use at least two metal bars to push the baffle to the left and right, and because the body is completely painted black or dark, the keyhole is also black and not reflective. It is still difficult See the appearance of the keyhole. ⑤ After doing ④, you need to add small flashlight lighting and small mirror reflection to have a chance to peek into the keyhole. But the space inside the arc 2 2 is too small. I ca n’t hold so many tools and ten pairs of fingers And because the keyhole is too small, the space left after inserting two metals is as small as a pencil lead. It is hard to see the position of the keyhole.

⑥ If the thief can solve the difficulty of item ⑤, it can be seen that the thin bar-shaped tool inserted into the keyhole will also make it difficult to move the structure in the keyhole due to the poor angle. Even if the lock core structure is tried to be turned, and the inner lock core structure is exposed and the inner lock core structure is managed to be lifted again, it is impossible to move the inner lock core structure again. The reasons are as follows: a. The three thin strip-shaped tools of the lock core structure will block the thief's line of sight, so that the thief cannot see the lock core structure, and therefore cannot unlock. B. The thief cannot grasp and manipulate 6 tools at the same time. Refraction mirror; c. The keyhole is too small, only two grains of rice, and only three tools can be used at most; d. The internal space to accommodate the arc is too small, and even the volume of the flashlight is not enough.

⑦Even if the thief manages to solve all the difficulties from ① to ⑥, it is difficult to make 6 tools not only continue to dial the lock core structure under the rebound pressure of the baffle (the force must be continuously dialed and each thin bar tool does not move Position), and maintain the original relevant position, and rotate at the same time half a circle, one circle or two circles to unlock.

⑧It takes more than eight hours to unlock the lock, and the ringing sounds constantly. The risk of arrest is very high, if there is a sudden vocal sound. Escaping halfway, quitting before returning. Trying to come back again. Time-consuming, without waiting to open the lock, It's bright.

Claims

Rights request

1. An anti-theft lock, comprising a keyhole shield and a door assembly, wherein one of the shields is provided with a countersink above the body, and a protective wall extends around the keyhole. A receiving arc extends from the open end of the retaining wall, and an opening is provided at the bottom of the body; and

A shielding door assembly is provided on the inner wall surface of the body near the keyhole. An L-shaped fixing piece is fixed on the inner wall surface of the body, and a fixing cymbal is fixed on the L-shaped fixing piece. Components and a blank.

The anti-theft lock according to claim 1, characterized in that a bell element is provided on the back surface of the blocking piece covering the door assembly.

3. The anti-theft lock according to claim 1, characterized in that a wing portion extends on both sides of the body of the keyhole shield, and the wing portion is clamped on the outer wall surface of the lock, and the wing portion is welded or glued with The outer walls of the lock are fixed together.

The anti-theft lock according to claim 1, characterized in that two or more shielding door assemblies can be provided at the keyhole.

5. The anti-theft lock according to claim 1 or 2, characterized in that a plurality of skirts are provided at the bottom of the body, and each of the skirts is provided with a hole for the screwing body to screw the shield to the door. On the periphery of the keyhole.