CN2709588Y

CN2709588Y - Anti-theft lock with hidden keyhole

Info

Publication number: CN2709588Y
Application number: CN 03239119
Authority: CN
Inventors: 程耀永
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-02-28
Filing date: 2003-02-28
Publication date: 2005-07-13
Anticipated expiration: 2013-02-28

Abstract

The utility model provides an anti-theft lock with a hidden keyhole. On the basis of the traditional machinery lock, a firm sealing cover, etc. are added right above the keyhole of the traditional lock through the anti-theft lock with a hidden keyhole, accordingly, the front surface of the keyhole is hidden, a straight line-shaped key or a tool (such as a master key, a roller bit, etc. ) cannot directly achieve the keyhole or cannot be inserted into the keyhole, accordingly, the purpose that the difficulty for illegally unlocking a key from a keyhole is improved is achieved, and the security of the lock is improved. The side surface of the sealing cover is provided with an opening used as unlocking space; as adopting a bending shape, the key of the lock can be inserted into the keyhole from the side surface of the sealing cover to normally unlock. The diagram of the structure of the lock with a hidden keyhole of the chain lock of the steel rope is showed on an attached drawing. The anti-theft lock with a hidden keyhole can be used for the manufacturing or the improving of the machinery locks, such as various bicycle locks, padlocks, built-in locks, etc.

Description

Hidden keyhole theftproof lock

Affiliated technical field this patent belongs to mechanical lock structure and manufacturing field.The utility model relates to a kind of theftproof lock, by its special structural design keyhole is covered up, and makes the difficulty more of illegally unblanking, and plays effect antitheft, pick-proof.

Background technology is present, the keyhole of known lock all is directly to expose, key can have no concealed ground and insert in the keyhole, can make like this and unblank conveniently, but also make and improperly unblank to become than being easier to, for example thief's instrument, electric drill etc. that can adopt various master keys or make similar key by oneself are illegally opened lock by keyhole, thereby cause the defence of lock to lose efficacy.The quilt of Regular Bicycle lock is prized also and is set about from keyhole mostly, and directly the keyhole that exposes provides convenience to offender's crime.Though also there are some have lid in the lock of public use on keyhole, this lid is a lot of can be opened easily to decorating and effect such as dustproof, waterproof, does not have the effect of pick-proof.

This theftproof lock of summary of the invention is on the basis of traditional mechanical lock, make the positive crested of keyhole by directly over keyhole, setting up firm sealing cover etc., make instrument (as master key, drill bit etc.) can not directly reach the keyhole place or insert in it by linearity, thereby reach the purpose of increase, improve the safety of lock from the illegal unlocking difficulty of keyhole.Simultaneously, reserve opening in the side of sealing cover, and the key of this theftproof lock adopts and has the shape of turning round, and can insert in the keyhole from the sealing cover side and normally unblank as the space of unblanking.By improving the intensity of lock body and sealing cover, the safety of lock is further improved in addition.

Below in conjunction with drawings and Examples the utility model is further specified.Be example with for bicycle wire rope chain lock among Fig. 1, this lock is made for transforming on the basis of common chain lock, before not adding sealing cover, its structure is identical with general chain lock construction, after adopting this patent, the keyhole on lock body (3) top adds a sealing cover (4), adopts general staight shank key can't insert in the keyhole (3) like this, directly insert in the keyhole and illegally unblank thereby also limited the instrument that adopts other direct rod shape, increase illegal unlocking difficulty.Simultaneously, leave opening, adopt to have the key (5) that 90 degree turn round in the diagram and can insert in the keyhole, change an angle and lock normally can be opened in a side of sealing cover.Key also can be designed as the key of hinge arrangement shown in (6) among the figure, but this key bending and stretching be used to during bending unblank, be convenient for carrying when stretching.

Fig. 2 is the application example schematic diagram of the hidden keyhole of a kind of bicycle lock.By prolonging the length of tapered end urceolus, and set up sealing cover and keyhole is formed hide among the figure, at lateral opening reserving the space of unblanking, the key unlocking that turns round by band.

Fig. 3 is that a kind of padlock is by the structure design schematic diagram that keyhole is hidden.By reasonable position of arranging keyhole, rely on the metal solid of part lock body to form among the figure, make keyhole, reach and adopt the linearity instrument can't insert the interior purpose of keyhole by hidden to the covering above the keyhole.

This patent is different with the lid of the general keyhole of rotating opening easily, and sealing cover that covers keyhole of this lock or entity and lock body are overall structure, can not open under situation about not being destroyed.This patent can be used for the manufacturing or the transformation of mechanical locks such as various bicycle locks, padlock, built-in lock.

Description of drawings Fig. 1 is hidden keyhole wire rope chain lock work and structural representation.Each several part is among Fig. 1: (1) chain; (2) lock body; (3) keyhole; (4) sealing cover; (5) be with the key that turns round; (6) hinge arrangement key.

Fig. 2 is the hidden keyhole lock construction of an a kind of bicycle schematic diagram.

Fig. 3 is a kind of hidden keyhole pad lock structure schematic diagram; Wherein (1) is keyhole.

The manufacturing of the related theftproof lock of specific embodiment this patent is based on traditional mechanical lock structure and manufacturing technology, by conventional lock being changed a little the theftproof lock that can obtain the described function of this patent.The structure of other parts and general lock are identical, only need keyhole is carried out hidden processing.Can adopt the sealing cover structure of welding or directly be designed to one with lock body, as Fig. 1, sealing cover (4) adopts solder technology and former tapered end to weld and forms fixedly sealing cover, also can directly be designed to the structure of sealing cover and tapered end one.Or by the relative position of structure design change keyhole at lock body, keyhole is hidden, as Fig. 3, keyhole is arranged on the hidden position that has gap.Make keyhole hidden by structural change in a word, make and adopt the direct rod shape instrument can't insert the purpose that can reach pick-proof in the keyhole, can adopt conventional mechanical manufacturing method manufacturing.The structural strength that increases sealing cover can make the safety of lock be further enhanced.The open space of confession insertion key should be greater than the actual insertion depth of key, and for making compact conformation, the key insertion depth is advisable to lack.Key that band turns round and hinge arrangement key also can adopt conventional mechanical manufacturing method to finish.

Claims

1. hidden keyhole theftproof lock is characterized in that: have fixing sealing cover directly over this lock keyhole, leave opening in a side of sealing cover.