CN2297507Y

CN2297507Y - Picking-proof lock

Info

Publication number: CN2297507Y
Application number: CN 97202980
Authority: CN
Inventors: 邱顺明
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-04-04
Filing date: 1997-04-04
Publication date: 1998-11-18
Anticipated expiration: 2007-04-04

Abstract

The utility model provides a picking-proof lock which is formed by the match of a lock core cylinder, a key and a protective steel sleeve sheathed on the exposed end of the front end of the lock core cylinder. The center of the protective steel sleeve is provided with a lock hole corresponding to a lock core hole, and the part without the lock hole and shielding a board body forms a blocking part preventing rotation. The protective steel sleeve and the lock core cylinder are connected into a whole by a pin, and the middle section of the key is provided with a concave cut slot of which the width is a little wider than the width of the lock hole of the steel sleeve. The exposed surface of the lock core cylinder is provided with the protective steel sleeve for protection, and thus, the lock core can be prevented from being damaged. The lock can only be unlocked by using the key of which the middle section is provided with the concave cut slot to avoid the block of the blocking part of the lock hole of the steel sleeve, and thus, safety is obtained.

Description

The pick-proof lock core

The utility model belongs to a kind of lockset accessory, particularly a kind of pick-proof lock core.

Existing lockset generally is lock core made of copper, and directly exposedly also very easily lockset is destroyed with electric drill by the evildoer even lock core has extremely complicated structure outside, or with other key runin, so safety inadequately.

The purpose of this utility model is that a kind of pick-proof lock core will be provided, and it can be avoided because of lock core is directly exposed to outer destroyed from the external world or with other key runin, thereby has strengthened anti-theft feature, reaches the purpose of safe handling.

The purpose of this utility model is achieved in that this pick-proof lock core is by lock core core tube, key be placed in the protection steel bushing that the lock core tube front end exposes and combine, then the steel bushing middle part is provided with and the corresponding lockhole of lock core hole, the shield body portion that this lockhole is not opened then forms the stop part that prevents turn, steel bushing and lock core tube fuse with pin, the key stage casing is provided with recessed grooving, the little width greater than steel bushing lockhole place of recessed grooving axial width.

Advantage of the present utility model is:

1, protected because of the lock core tube exposed face protects steel bushing, and the steel bushing material is hard, can exempt from the ruffian and directly destroy.

2, because of after key penetrates lock core tube, have only and utilize the middle part to have the key of recessed grooving, just can not be subjected to the lockhole hole slot of steel bushing not to be communicated with blocking of stop portions partly, and can be in lock core hole the Unscrew lockset, therefore, must use original key to unblank, further strengthen the safe antitheft function.

Concrete structure of the present utility model is realized by the following examples and accompanying drawing

Fig. 1 is the utility model three-dimensional exploded view;

Fig. 2 is the utility model lock core tube and steel bushing combination back stereogram;

Fig. 3 is the utility model combination back sectional view;

Fig. 4 is the B-B section enlarged diagram of Fig. 3;

Below in conjunction with accompanying drawing concrete structure of the present utility model is described in detail:

With reference to Fig. 1,2, this pick-proof lock core is matched by lock core tube 1 and key 3 and forms, it is characterized in that: at the front end of lock core tube 1, an intrinsic protection steel bushing 2 is overlapped in the inserting side of key 3, be provided with a lockhole 20 in the middle of the protection steel bushing 2, the lock core hole of being offered in lockhole 20 and the lock core tube 1 10 is corresponding, protects that the inboard of part has then constituted the stop part 200 that prevents outer bitting rotation beyond steel bushing 2 and the lockhole 20 that rib groove key 3 plugs mutually.Referring to Fig. 1 to Fig. 4

The cross sectional shape of protection steel bushing 2 is ㄩ shape, protection steel bushing 2 with the solid ring wall 22 of the outer section cover of lock core tube 1 on offer one and bore a hole 21, lock core tube 1 periphery offer one with perforation 21 corresponding pin holes 11, steady pin A radially offers and penetrates and will protect steel bushing 2 in perforation 21 and the pin hole 11 and lock core tube 1 is connected and fixed.Referring to Fig. 1 to Fig. 3

The hole shape of protection steel bushing 2 lockholes 20 is identical with the shape of lock core 10, on the insertion section of key 3, offer one and hold the recessed grooving 30 between the lateral border in the lockhole 20, recessed grooving 30 axially offer the thickness of width greater than the steel plate at the lockhole place 20 in the middle part of the front side wall of protection steel bushing 2.Referring to Fig. 3 and Fig. 4

Using method of the present utility model is as follows: with reference to Fig. 3, Fig. 4

When opening lockset, key 3 is inserted the lockhole 20 of steel bushing 2 and the lock core hole 10 of lock core tube 1, the little width of recessed grooving 30 axial widths because of key 3 stage casings greater than steel bushing 2 lockholes 20, make the recessed grooving 30 of key 3 just in time stride appearance between the interior outer rim of lockhole 20 thickness directions, when turn key 3 drives lock core hole 10 rotations, can not run into the formed stop part 200 of lockhole 20 edge portions of steel bushing 2, realized the purpose that necessary use original key just can be unblanked, and during with the key unlocking of other lock, must be subjected to stopping of stop part 200, can't turn lock core hole 10, lockset also just can't be opened.

Claims

1, pick-proof lock core, match by pick-proof lock core tube (1) and key (3) and to form, it is characterized in that overlapping an intrinsic protection steel bushing (2) in the inserting side of the front end key (3) of lock core tube (1), be provided with a lockhole (20) in the middle of the protection steel bushing (2), the lock core hole of being offered in lockhole (20) and the lock core tube (1) (10) is corresponding, and the lockhole (20) that the rib groove with key (3) of protection steel bushing (2) plugs the mutually inboard of part has in addition then constituted the stop part (200) that prevents outer bitting rotation.

2, by the described pick-proof lock core of claim 1, it is characterized in that: the cross sectional shape of protection steel bushing (2) is ㄩ shape, protection steel bushing (2) with the solid ring wall (22) of the outer section cover of lock core tube (1) on offer one bore a hole (21), lock core tube (1) periphery offer one with perforation (21) corresponding pin hole (11), steady pin (A) is radially offered and is penetrated and will protect steel bushing (2) and lock core tube (1) in perforation (21) and the pin hole (11) and be connected and fixed.

3, by claim 1 or 2 described pick-proof lock cores, it is characterized in that: the hole shape of the lockhole (20) of protection steel bushing (2) is identical with the shape of lock core (10), on the insertion section of key (3), offer one and hold the recessed grooving (30) between the lateral border in the lockhole (20), recessed grooving (30) axially offer width is located steel plate greater than the lockhole (20) in the middle part of the front side wall of protection steel bushing (2) thickness.