CN2303047Y - Key for lock able to increase its teeth - Google Patents

Abstract

The utility model relates to a key for a lock which is able to increase teeth, comprising a key head, a key rod and a tooth increasing device. An operating button is arranged on the key head, and the action of the operating button can be transferred to the key rod. The extension of a hook spring which is arranged in the key rod is used for increasing the teeth of the key. When the key is inserted into the keyhole, the tail ends of parts of the lock beads are not extended and projected outside the keyhole. Even the variation of all the lock beads in the keyhole is searched out by other people, the insert of the keyhole which is provided with hidden lock beads is impeded by convex body of the round rod key, which can achieve the purpose of theft protection.

Description

Can increase the key of tooth

The utility model relates to the key of opening door lock, particularly relates to a kind of key that increases the unlatching door lock of tooth.

Present door lock mostly is mechanical lock, and traditional mechanical key lock, receiving the pin pearl system bolt-lock tube of Yale (Linus Yale) invention with in 1848 by woods again uses the most extensively, see also Fig. 1, the core 10 of traditional mechanical lock is to promote the bodies of rod 13 by locking closure body 11 mat flexible members 12 to be fastened in rotary body 14 lockings, and mat key 15 promotes these body of rod 13 these rotary bodies 14 of disengaging and rotates this rotary body 14 drives one locking bolt and open door lock again.The known structure of the promising common people of this mechanical lock, the thief can stir fast from keyhole and respectively lock pearl easily with the door lock unlatching, therefore is necessary to improve.

The purpose of this utility model is to provide a kind of key that increases tooth, it can increase the tooth of key, though make other people understand the variation of respectively locking pearl in the keyhole, also can make really safe antitheft of door lock because of circular bar shape body flange on the key hinders the keyhole that the lock pearl is hidden in its insertion.

The purpose of this utility model is achieved in that promptly provides a kind of key that adds the tooth device that has, and comprises that a key bit, a key body of rod and add the tooth device.Described key bit is a rectangle box-like body, the long limit of described box body central authorities are provided with one in order to connect the protrusion short tube of the described key body of rod, and be provided with an action button at described box body minor face, be provided with the L shaped guide rod of a fixed axis and the described action button action of a conduction in described box body inside; The described key body of rod is round bar shape, is a through hole in the middle of it, and its front end is embedded in described key bit, and terminal interlocking has a saturating empty gag; The described tooth device that adds comprises a hook spring, a compression spring and a transmission body of rod, the described transmission body of rod and described compression spring tandem arrangement are in the through hole of the described key body of rod, described dentation device one end is connected in described L shaped guide rod, the other end hook spring interior with placing described gag is connected, described transmission body of rod end is the wedge-like inclined-plane, and described hook spring is subjected to the action of described action button to push varicose laterally and increases the tooth of key.

The advantage of the utility model device is that it can increase the tooth of key, and the stranger promptly enables to understand the situation of respectively locking pearl in the keyhole, still can not touch hide but the tooth that can increase is therefore antitheft reliable.

Below in conjunction with accompanying drawing, embodiment of the present utility model is described, wherein:

Fig. 1 is existing lock core structure schematic diagram;

Fig. 2 is the three-dimensional exploded view of the utility model key embodiment;

Fig. 3 inserts the sectional view of lock core for the utility model key.

See also Fig. 2, the key that increases tooth of the present utility model comprises that a key bit 20, a key body of rod 30 and increase tooth device 40, wherein:

This key bit 20 is a rectangle box-like body, the long limit of this box body central authorities are provided with one and protrude short tube 21 in order to connect the key body of rod 30, and be provided with an action button 22 at the box body minor face, be provided with the action of a fixed axis 23 and a L shaped guide rod 24 in order to conduction operation button 22 in box body inside.

This key body of rod 30 is round bar shape, is provided with a through hole 31 in the middle of it, and its front end is embedded in key bit 20, terminal interlocking one saturating empty gag 32, and the object that its flange physical efficiency hinders beyond the utility model hook spring touches the lock pearl of hiding.

This increases tooth device 40, comprise a hook spring 41, a compression spring 42 and a transmission body of rod 43, this transmission body of rod 43 and compression spring 42 tandem arrangements are in the through hole 31 of the key body of rod 30, the one end is connected in L shaped guide rod 24, the other end is connected with hook springs 41 in placing gag 32, the wedge-like inclined-plane 44 of the nationality transmission body of rod 43 ends is pushed because of the action of action button 22 again, forces this hook spring 41 varicose laterally to reach the purpose that increases key bit.

See also Fig. 3, when this key inserts lockhole 50, utilize the special entity of this increase tooth, make the terminal part lock pearl 51 that does not stretch protruding in keyhole 50, because of the structure that can increase key bit realizes locking the roof pressure of pearl 51, and then can allow lock core inner all fix bodies of rod 52 and can both respectively lock the passing of pearl 51 and break away from rotary body 53 by nationality, and rotate rotary body 53 and drive a locking bolt 54 door is opened.

Can know from foregoing description and to find out, general locksmith's unlocking tool can't unplug easily for lockhole of the present utility model, even the stranger elicites the arrangement of respectively locking pearl in the lockhole, also can make lockset antitheft really because of circular bar shape body flange on the key hinders the keyhole that the lock pearl is hidden in its insertion.

Claims (1)

1. one kind has the key that adds the tooth device, comprise that a key bit, a key body of rod and add the tooth device, it is characterized in that, described key bit is a rectangle box-like body, the long limit of described box body central authorities are provided with one in order to connect the protrusion short tube of the described key body of rod, and be provided with an action button at described box body minor face, be provided with the L shaped guide rod of a fixed axis and the described action button action of a conduction in described box body inside; The described key body of rod is round bar shape, is a through hole in the middle of it, and its front end is embedded in described key bit, and terminal interlocking has a saturating empty gag; The described tooth device that adds comprises a hook spring, a compression spring and a transmission body of rod, the described transmission body of rod and described compression spring tandem arrangement are in the through hole of the described key body of rod, described dentation device one end is connected in described L shaped guide rod, the other end described hook spring interior with placing described gag is connected, described transmission body of rod end is the wedge-like inclined-plane, and described hook spring is subjected to the action of described action button to push varicose laterally and increases the tooth of key.

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