CN2487824Y - Screw-type anti-picking door lock - Google Patents

Abstract

The utility model relates to a screw-type anti-picking door lock. The head of a lock bolt is made into a screw axis structure. A nut support base is added inside a lock shell to match with the screw axis of the lock bolt. A taper gear is arranged on the back of the lock bolt and the tail of an inner and outer lock core (axis). A lock button body with inner screw is arranged inside a lock button box. The key is inserted into the lock to rotate the lock core if locking, and the taper gear transmitting auxiliary on the lock core makes the lock bolt to rotate forward, extend out and screw into the inner screw of the lock button. The lock shell of the utility model has only the lock bolt with a screw axis and the matching components. If the lock is locked, the door lock can effectively prevent the thief from destroying the lock by a picking bar. The utility model has a simple structure, low cost and strengthened anti-picking performance.

Description

Screw-type pick-proof door lock

The utility model relates to a kind of anti-theft security lock designing technique, and particularly a kind of improved screw-type pick-proof door lock can be installed in all kinds of security doors or other special burglary insurance devices (as safe door) and go up use.

Existing all kinds of safe-guard door lock has mechanical code lock, cylinder lock (or spring padlock), single, double tongue insurance lock and electronic cipher alarming lock or the like.Above-mentioned these locksets are through updating, technical performance and functional performance all improve a lot, the thief desires to want to unblank with homemade master key very difficult, sorry is exactly existing lockset pick-proof poor performance, no matter for example be single, double tongue or even three tongue anti-theft billiards door locks, generally be by lock housing body, inside and outside lock cylinder, the tapered end, dead bolt (or claiming locking bolt) and the compositions such as keeper that cooperate with dead bolt (locking bolt) that cooperate with lock core.During use, key is inserted lock core groove, rotating key, lock core tail end are dialled bar and can shooting the lock-bolt are advanced or retreat (afterwards contracting) and lock or unlocking action to finish.Because plug face is smooth, the thief is as long as pry open lock housing body or keeper with crow bar (or screwdriver), just can allow dead bolt locking bolt release lock button box easily, makes a unlatching.

The purpose of this utility model is a kind of improved screw-type pick-proof door lock of design, and it is dexterous simple that it has structure, and the pick-proof performance is good, can be used as anti-theft device application (as using in safety cabinet) under all kinds of safe-guard door locks and the special occasions

The utility model is realized with following technical scheme: it still comprises the lock housing body, inside and outside lock cylinder, inside and outside tapered end (body) with the assembling lock core, locking bolt, tiltedly tongue and (cooperating with locking bolt and oblique tongue) keeper are formed, it is characterized in that making the thread spindle structure at the locking bolt head, in the lock housing body, set up the nut bearing that has internal thread and cooperate installation with the threaded shank portion of locking bolt, all being equiped with at the locking bolt rear portion of threaded shaft and interior outer lock core (axle) tail end can intermeshing conical gear (being bevel gear), in keeper, be provided with the locked body that has internal thread (also claiming the nut button) that can cooperate with locking bolt head end thread spindle, constitute the screw fastening bolt assembly with this, when locking, insert key rotation lock core (axle), can locking bolt be rotated forward to stretch out and be screwed in the internal thread of (screw-in) locked body.

Below in conjunction with drawings and Examples concrete structure principle of the present utility model is described further.

Fig. 1 is a kind of assembly structure schematic diagram of the present utility model.

Fig. 2 is the sectional view (vertical view of Fig. 1) of Figure 1A-A direction

Wherein: 1-lock housing body, the outer lock tube (claiming lock barrel again) of 2-, the outer tapered end of 3-, 4-outer lock core (axle), 5-key, 6-transmission bar (also claiming to dial bar), 7-compression spring (clutch-plate stage clip), 8-outer lock core clutch-plate, 9-outer lock core shaft tail end conical gear (being bevel gear), 10-is contained in the conical gear (being movably arranged on the locking bolt rear portion by key) at locking bolt rear portion, 11-threaded shaft locking bolt, the tapped nut bearing of 12-(cooperating with the threaded shank portion of locking bolt), the 13-keeper, the tapped locked body of 14-, 15-key, the oblique tongue support of 16-, the conical gear (bevel gear) of 17-internal cylinder shaft tail end, 18-clutch-plate top cover, the 19-inner lock head, 20-internal cylinder (axle), lock tube in the 21-, 22-locking bolt shift fork, the oblique tongue of 23-, 24-oblique tongue rod spring, 25-pad, 26-tongue bar alignment pin, 27-tongue span plate, 28-driving lever (also claiming push pedal), 29-pad, 30-driving lever backing pin, the 31-oblique tongue rod, 32-shakes hands to enclose, and 33-makes the pin of the hinged point of driving lever usefulness, location (guiding) post of 34-clutch-plate top cover.

With reference to accompanying drawing as can be known, the utility model also has following technical characterictic when specific design:

One, the clutch-plate 8 of band compression spring 7 is installed on the transmission bar 6 of outer lock core 4 tail ends, under the effect of compression spring, this clutch-plate can be meshed with the end face groove (end face groove of bevel gear) of the conical gear 9 of outer lock core shaft tail end, between internal cylinder 20 tail ends and outer lock core clutch-plate 8, be movably installed with a clutch-plate top cover 18, when inserting the key roof pressure at the internal cylinder groove when clutch-plate pushes up on the cover 18, can withdraw from backward by other end pushing (roof pressure) clutch-plate 8 of this clutch-plate top cover and the engagement of conical gear 9 end face grooves of disengaging and outer lock core shaft tail end, to realize unblanking and locking (i.e. realization unblanking and locking) internally with internal cylinder.After key withdrawed from, compression spring 7 allowed clutch-plate 8 reset again and gets back in the end face groove of conical gear.

Two, also being provided with one near the tail end of oblique tongue rod 31 can be around the driving lever 28 of hinged spot wobble, tail end at threaded shaft locking bolt 11 offers a shift fork 22 and these 28 movable cooperations of root driving lever, when unblanking, the shift fork 22 of locking bolt 11 tail ends can promote driving lever 28 and swing backward, so drive make in the oblique tongue 23 retraction lock housing bodies 1 door opened.

Compared with the prior art, the utility model is only made a locking bolt that is threaded axle in the lock housing body Structure is furnished with the matching components such as conical gear and tapped locked body again, after locking, and can be effectively anti-End the thief and ruin lock crime (unless doorframe is prized) with crow bar, have simple in structure, handling ease, Cost low (working as with old anti-theft door is phase-locked), but its pick-proof performance obviously strengthens suitable the work respectively The lock of class building door lock and specific use (such as safety cabinet) uses.

Claims (3)

1, a kind of screw-type pick-proof door lock, it comprises lock housing body (1), inside and outside lock cylinder, be used to assemble the inside and outside tapered end (19 of lock core, 3), locking bolt, tiltedly tongue (23) and keeper (13) are formed, it is characterized in that making the thread spindle structure at locking bolt (11) head, in lock housing body (1), set up nut bearing (12) and cooperate installation with the thread spindle of locking bolt (11), locking bolt (11) rear portion and interior outer lock core (20 in threaded shaft, 4) all be equiped with can intermeshing conical gear for tail end, in keeper (13), be provided with the locked body that has internal thread (14) that can cooperate with locking bolt (11) head end thread spindle, constitute the screw fastening bolt assembly with this, when locking, insert key rotation lock core, can locking bolt be rotated forward to stretch out and the internal thread of spiro lock button in.

2, screw-type pick-proof door lock according to claim 1, it is characterized in that on the transmission bar (6) of outer lock core (4) tail end, being equipped with the clutch-plate (8) of band compression spring (7), this clutch-plate can be meshed with the end face groove of the conical gear (9) of outer lock core shaft tail end, between internal cylinder (20) tail end and outer lock core clutch-plate (8), be movably installed with a clutch-plate top cover (18), when inserting the key roof pressure at the internal cylinder groove when clutch-plate top cover (18) is gone up, can withdraw from backward by the other end pushing clutch-plate (8) of this clutch-plate top cover and the engagement of disengaging and conical gear (9) end face groove, with realization unblanking and locking internally.

3, screw-type pick-proof door lock according to claim 1, it is characterized in that being provided with near the tail end of described oblique tongue rod (31) one can be around the driving lever (28) of hinged spot wobble, offering a shift fork (22) at the tail end of threaded shaft locking bolt (11) cooperates with driving lever (28) is movable, when unblanking, the shift fork of locking bolt tail end can promote driving lever and swing backward, so drive make in the oblique tongue retraction lock housing body door can open.

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