CN203403736U - Anti-theft door lock - Google Patents

Abstract

The utility model provides an anti-theft door lock, and belongs to the technical field of door locks. The anti-theft door lock solves the technical problems that an existing anti-theft door lock is poor in axial locking capacity and low in anti-theft strength. The anti-theft door lock comprises a fixing plate, a lock shell and a lock tongue. The fixing plate is fixedly connected with the front end of the lock shell. The lock tongue is installed in the lock shell and can move axially. Two symmetrically-arranged lock tongue hooks are arranged in the lock tongue, and hook tongues are arranged on the lock tongue hooks. The rear end of the lock shell is provided with a twisting component which penetrates through the lock shell and rotates. The twisting component is connected with the lock tongue and the lock tongue hooks and controls entering and retreating of the lock tongue in the lock shell. The hook tongues extend out of the lock shell along with the lock tongue, penetrate through the lock tongue and extend out of the two sidewalls of the lock tongue, and hook tongues retract into the lock shell along with the lock tongue and retract into the lock tongue. The anti-theft door lock is simple in structure, high in strength and strong in axial locking capacity, and greatly enhances the anti-theft effect.

Description

A kind of safe-guard door lock

Technical field

The utility model belongs to door lock technical field, relates to a kind of safe-guard door lock.

Background technology

Door lock is that a kind of being mounted on door is used for door lock to live to prevent that other people from opening this equipment easily, the kind of door lock is a lot, has mechanically, also has electrical type, according to different use occasions and user demand, its kind differs, but most door locks all should possess a common feature, and that is exactly antitheft, so people's opposite house is locked on antitheft and makes an issue of, various safe-guard door locks emerge in an endless stream, and in numerous safe-guard door locks, the most common with mechanical safe-guard door lock.

Mechanical safe-guard door lock be take the mode of manually unblanking as main, its reasonable price, mechanical strength is higher, install and keep in repair all more convenient, therefore market share amount is larger, this safe-guard door lock mainly consists of lock housing and the dead bolt that is arranged in lock housing, wrench device is installed in lock housing and is connected with dead bolt, on wrench device, be provided with keyhole, people are by externally inserting key keyhole and rotating the turnover of the controlled lockmaking tongue of wrench device, when dead bolt stretches out lock housing, dead bolt enters in the dead bolt hole being arranged on door pocket and door lock is lived, when dead bolt recedes in dead bolt hole, door can freely be opened, dead bolt is important component in this class door lock as can be seen here, the quality of dead bolt and structure directly affect the quality of door lock, particularly affect the theftproof performance of safe-guard door lock, because this class safe-guard door lock is all to adopt door latch type dead bolt, when dead bolt stretches out beyond lock housing and inserts in dead bolt hole, dead bolt can make safe-guard door lock move radially, can prevent that door from opening easily with body of wall, but this class door latch type safe-guard door lock is only applicable to vertical hinged door and can only in the axially-movable direction of door, locks by opposite house, but lock on can not opposite house being locked in axially, and the power that some stealers apply door lock while forcing open the door has been just axial force, so the theftproof performance of security door reduces greatly, and this door lock can not use as the axial unlatching of sliding door and so on door on, its scope of application is more single.

Therefore, people adopt various mode to strengthen dead bolt locking intensity in the axial direction, wherein just be included in dead bolt inside and set up a dead bolt hook, dead bolt hook is flexibly connected with dead bolt, while entering in dead bolt hole beyond dead bolt stretches out lock housing, dead bolt hook stretches out dead bolt outside simultaneously and is hooked in dead bolt hole, prevent dead bolt movement in the axial direction, yet this dead bolt of setting up a dead bolt hook has some disappearances on latching force and lock face, it can only guarantee that dead bolt dogging lives one of them direction in above-below direction, and the other end of dead bolt hook is not set, so the other end becomes the weaker one end of theftproof lock integral locking power, therefore its axial latching force is poor, and the axial locking ability of dead bolt integral body is born by one end entirely, in the course of time, it is permanent stressed larger, easily damage, will inevitably lose latching force, therefore its locking intensity is poor, application life is lower, antitheft coefficient is lower.

Thus, people's utility model a kind of safe-guard door lock with double lock tongue hook, by set up two dead bolt hooks in dead bolt inside, reach equilibrium of forces on upper and lower both direction, its locking intensity is stronger, increase application life, for example, notice of authorization number discloses a kind of lateral locks of safety door for the utility model patent of CN2821069Y, comprise panel, two dead bolt hooks, spring, short strike plate, sliding piece, long strike plate, lock box, two dead bolt hooks and spring fitting are between short strike plate and long strike plate, the two ends of spring are separately fixed on the spring fixed column of two dead bolt hooks, hinged by bearing pin between dead bolt hook and short strike plate and long strike plate, between short strike plate and long strike plate, by bearing pin, be fixed together formation dead bolt, panel and lock box are fixed together, the slide socket at the two ends up and down of lock box is passed respectively at two of sliding piece, by dead bolt hook, the head of the dead bolt of the buckle that short strike plate and long strike plate form is inserted in the dead bolt hole of panel, the afterbody of the dead bolt of buckle is placed in the groove on lock box inwall, on the dead bolt of buckle, be provided with slip pin, slip pin is inserted in the straight runner in the oblique chute on sliding piece and on lock box.

Although this kind of door lock adopts double lock tongue hook, make the axial latching force of dead bolt under on the whole balanced, but due to its Men Biansuo as security door, be arranged on upper two angles up and down corresponding with security door master lock of door, world lock fork in driving lever during installation on sliding piece and security door master lock links together, during use, need to drive this kind of Men Biansuo by master lock, Men Biansuo stretches out, retract and all need to control by master lock, therefore there are following problems, first all comparatively inconvenience in operation and use, Men Biansuo is arranged on the upper inferior horn of door, distant with master lock, its moment is longer, whole door-locking system structure is comparatively complicated, folding by master lock control gate limit lock is more painstaking, and in use, the problem of being prone to that is connected of master lock and Men Biansuo, cause normally folding of Men Biansuo, affect its theftproof performance, secondly, owing to supporting the use with master lock, this kind of door lock self lock body structure is also more complicated, and if the theftproof performance of master lock poor, stealer also can be removed the locking of Men Biansuo by master lock, its theftproof performance is poor, again, this kind of door lock can not independently be used, and must support the use with master lock, more can not on sliding door, use alone, therefore increased user's use cost.

Utility model content

The purpose of this utility model is the problems referred to above that exist for prior art, has proposed the safe-guard door lock that a kind of theftproof performance is good, simple in structure, easy to use, cost is low and the scope of application is wider.

The purpose of this utility model can realize by following technical proposal: a kind of safe-guard door lock, comprise fixed head, lock housing and dead bolt, fixed head and lock housing front end are connected, dead bolt is arranged on lock housing inside and can moves axially, two symmetrically arranged dead bolt hooks are installed in dead bolt, on dead bolt hook, be provided with hook tongue, lock housing rear end is provided with the twisting assembly that runs through lock housing and rotation, twisting assembly and dead bolt, dead bolt hook is connected, and control dead bolt and pass in and out in lock housing, hook tongue stretches out outside lock housing and passes dead bolt and stretch out outside two side with dead bolt, hook tongue is with being retracted in dead bolt in dead bolt retraction lock housing.

In above-mentioned a kind of safe-guard door lock, described twisting assembly comprises and runs through turning round hole, being arranged on and turning round on hole and two of being parallel to each other turn round circle and driver plate of lock housing, turn round circle middle part and be provided with coaxial jack, two turn round circle is fixedly connected with, described driver plate rear end and two is turned round circle and is flexibly connected and turns round between circle two, and driver plate front end is flexibly connected with dead bolt and dead bolt hook respectively.

In above-mentioned a kind of safe-guard door lock, described one end outward radial of turning round circle extends connection bearing, above-mentioned alignment pin is installed in and connects on bearing, in lock housing, be positioned at and turn round the erection support that the periphery in hole is provided with, the described circle of turning round is arranged on and turns round and connection bearing is resisted against on erection support in the hole in, described in to turn round hole coaxial with jack.

In above-mentioned a kind of safe-guard door lock, described driver plate has the connecting portion of an arc, and the two ends of connecting portion are connected with rear end with the front end of driver plate respectively.

In above-mentioned a kind of safe-guard door lock, the above-mentioned hook tongue that described dead bolt hook comprises hook tongue main body and is bent to form by hook tongue main body one end, in hook tongue main body, offer bar v notch v, described dead bolt middle part axially offers bar hole, and lock housing front end is provided with and runs through the dead bolt pin of lock housing and dead bolt pin successively through bar v notch v and bar hole.

In above-mentioned a kind of safe-guard door lock, on dead bolt front end side, axially offer the capable slide opening one of bar, above-mentioned dead bolt hook moves axially in the interior movement of the capable slide opening one of bar with dead bolt, and dead bolt rear end side axial offers the capable slide opening two of bar, above-mentioned driver plate with the rotation of turning round circle in the interior movement of the capable slide opening two of bar.

In above-mentioned a kind of safe-guard door lock, at dead bolt middle part, be provided with the opening bearing pin that runs through dead bolt, the above-mentioned dead bolt hook other end is set on opening bearing pin and take opening bearing pin as axle center rotation.

In above-mentioned a kind of safe-guard door lock, between driver plate and dead bolt hook, be provided with spring, the front end of driver plate is provided with spring fastening, and spring one end is fixed on spring fastening, and the other end is connected with opening bearing pin.

In above-mentioned a kind of safe-guard door lock, lock housing is comprised of enclosing cover one and enclosing cover two, enclosing cover one is provided with bandy pinch plate with enclosing cover two front ends, on described fixed head, be provided with the fixing hole passing for pinch plate, pinch plate through fixing hole, lock housing is fixedly connected with fixed head and pinch plate and fixed head in same plane.

Compared with prior art, the utlity model has following beneficial effect: first, two symmetrical dead bolt hooks are installed in dead bolt simultaneously, are made the axial latching force of dead bolt both sides balanced, its locking performance is stronger, and anti-theft effect is better, secondly, the utility model component are less, self structure is simple, in lock housing, be provided with and turn round circle, directly by outside, insert key and just can control stretching of dead bolt and opening and closure of dead bolt hook, can directly as primary door latch, use, without being used in combination with other door lock, overall structure is simple, its probability breaking down reduces greatly, can not affect it uses normally, application life is more of a specified duration, lock housing easy disassembly, be convenient to daily maintenance and replacing, it uses also more for convenience, because it can be used alone, its price of safe-guard door lock of comparing existing double lock tongue hook is more economical, use cost is lower, both can be used on vertical hinged door, also can be used on sliding door, applicable is wider.

Accompanying drawing explanation

Fig. 1 is the side schematic view of a kind of safe-guard door lock of the utility model.

Fig. 2 is the cross-sectional view of a kind of safe-guard door lock of the utility model.

Fig. 3 is the exploded perspective structural representation of a kind of safe-guard door lock of the utility model.

Fig. 4 is the plan view of dead bolt hook in a kind of safe-guard door lock of the utility model.

In figure, 10, fixed head; 11, storage tank; 12, fixing hole; 13, installing hole one; 20, lock housing; 21, enclosing cover one; 22, enclosing cover two; 23, turn round hole; 24, erection support; 25, dead bolt pin; 25a, dead bolt pin-and-hole; 26, anchor pin; 26a, grappling pin-and-hole; 27, screw; 28, pinch plate; 29, bayonet socket; 29a, fixture block; 30, dead bolt; 31, bar hole; 32, connecting pin; 32a, connection pin-and-hole; 33, opening bearing pin; 33a, cotter-pin hold; 34, the capable slide opening one of bar; 35, the capable slide opening two of bar; 40, dead bolt hook; 41, hook tongue main body; 42, hook tongue; 43, bar v notch v; 43a, the first breach; 43b, the second breach; 43c, the 3rd breach; 44, locating hole three; 50, driver plate; 51, locating hole one; 52, locating hole two; 53, spring fastening; 60, turn round circle; 61, jack; 62, alignment pin; 63, connect bearing; 64, dowel hole; 70, spring, 80, decoration panel; 81, installing hole two.

The specific embodiment

Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.

As shown in Figure 1, a kind of safe-guard door lock of the utility model, comprise decoration panel 80, fixed head 10, lock housing 20 and dead bolt 30, fixed head 10 is connected with lock housing 20 front ends, dead bolt 30 is arranged in lock housing 20 and is flexibly connected with lock housing 20, and dead bolt 30 moves axially in lock housing 20 and dead bolt 30 front ends can and stretch out beyond fixed head 10 through fixed head 10.

As shown in Figure 2, dead bolt 30 inside are provided with symmetrically arranged dead bolt hook 40, the rear end of lock housing 20 is provided with the twisting assembly and the twisting assembly that are connected with lock housing 20 and connects dead bolt 30 and dead bolt hook 40 simultaneously, on dead bolt hook 40, be provided with hook tongue 42, twisting component synchronization control dead bolt 30 moves axially in lock housing 20 and dead bolt hook 40 opens and closure, hook tongue 42 stretches out lock housing 20 when outer when dead bolt 30, hook tongue 42 passes dead bolt 30 and stretches out outside two side, hook tongue 42 is when dead bolt 30 retraction lock housings 20 are when interior, and hook tongue 42 is retracted in dead bolt 30.

In the interior axial both sides of dead bolt 30, two dead bolt hooks 40 are installed simultaneously, when dead bolt 30 puts in dead bolt hole, dead bolt hook 40 hooks the relative both direction of dead bolt hole simultaneously, reach Bidirectional locking, make the axial latching force of dead bolt both sides balanced, monodirectional locking more in the past, the locking performance of this theftproof lock is stronger, anti-theft effect is better, is arranged on vertical hinged door or sliding door all rightly, and its scope of application is wider.

As shown in Figure 2, twisting assembly comprise run through lock housing 20 turn round hole 23, be arranged on and turn round on hole 23 and two of being parallel to each other turn round circle 60 and driver plate 50, driver plate 50 front ends are connected with dead bolt hook 40 with dead bolt 30 respectively, driver plate 50 rear ends are turned round with two that circle 60 is flexibly connected and are turned round and enclose between 60 two, two turn round circle 60 symmetrical parallel settings, turning round circle 60 is that cylindrical shape and one end of turning round circle 60 extend outward circular connection bearing 63, turn round circle 60 integral body and be axial step shape, turning round circle 60 middle parts axially offers jack 61 and two to turn round the jack 61 of circle on 60 coaxial, connect on bearing 63 and offer three dowel holes 64, wherein two dowel holes 64 are adjacent and be positioned at a side that connects bearing 63, another dowel hole 64 is positioned at the opposite side that connects bearing 63, alignment pin 62 is arranged in dowel hole 64 and turns round circle 60 by two and is fixedly connected with, further, the rear end of driver plate 50 is provided with locating hole 1, the rear end of driver plate 50 is set on adjacent two alignment pin 62 one of them alignment pin 62 and two and is turned round between circle 60 by locating hole 1.

Turn round that circle 60 is arranged in lock housing 20 and himself is rotatable, turn round circle 60 is static with respect to lock housing 20 on locus, but turning round circle 60 self can circumferentially rotate, and dead bolt 30 all moves axially in lock housing with dead bolt hook 40, turn round the motion state of circle 60 and dead bolt 30 and dead bolt hook 40, the direction of motion is all different, dead bolt 30 and dead bolt hook 40 can produce friction with lock housing 20 inwalls when mobile lock housing 20 is interior, and friction can hinder the movement of dead bolt 30 in lock housing, affect the result of use of this safe-guard door lock, and by turn round circle 20 and dead bolt 30 between driver plate 50 is installed, driver plate 50 with turn round circle 60, dead bolt 30 is all flexibly connected, dead bolt 30 and dead bolt hook 40 are remained to be moved axially, make the use of this safe-guard door lock more flexible.

As shown in Figure 3, turn round hole 23 and run through lock housing 20, in lock housing 20, be positioned at the periphery of turning round hole 23 and be provided with erection support 24, erection support 24 is symmetrically arranged two arc back-up blocks, turn round circle 60 through erection support 24 and be arranged on and turn round in hole 23, connect bearing 63 and be resisted against on erection support 24 and back-off shape, turn round hole 23 coaxial with jack 61.

On the inner surface of lock housing 20 both ends of the surface, be provided with erection support 24, turn round circle 60 through erection support 24, erection support 24 is looped around turns round circle 60 peripheries, preventing from turning round circle 60 moves radially, make to turn round circle 60 and take all the time the center of circle as the circumferential rotation of axle center maintenance, reduced to turn round the gap between circle 60 and lock housing 20, make to turn round the difficult quilt of circle 20 external world and destroy, increase the intensity of safe-guard door lock, improved the theftproof performance of safe-guard door lock; Two connection bearings 63 are all resisted against on the erection support 24 of a side separately, two erection supports 24 are fixed on lock housing 20 inside by the two connection bearings 63 that are oppositely arranged, making to turn round circle 20 can not move axially, prevent from turning round beyond outstanding lock housing 20 end faces of circle 60, keep turning round the globality of circle 60 and lock housing 20.

As shown in Figure 3, driver plate 50 is divided into front portion, what the connecting portion 50a of rear portion and medial arc and three were integral type is tabular, being shaped as of driver plate 50 is crooked tabular, locating hole 1 is positioned at driver plate 50 rear portions and is positioned at the inner arc place of arc connecting portion 50a, due to driver plate 50 with turn round circle and 60 be flexibly connected, and driver plate 50 will drive dead bolt 30 in the interior movement of lock housing 20 with the rotation of turning round circle 60, and the stroke of dead bolt 30 is longer, if driver plate 50 is linearity, when turning round circle 60 rotation, the longest stroke of driver plate 50 is the radius of turning round circle 60, therefore cannot reach the due haul distance of dead bolt 30, and the connecting portion 50a of driver plate 50 is arc, while making to turn round circle 60 rotation, the shift motion of driver plate 50 increases and can meet the turnover of dead bolt 30.

As shown in Figure 2, on the angle of dead bolt 30 rear end end faces, offer the connection pin-and-hole 32a that runs through dead bolt 30, connect in pin-and-hole 32a and be installed with connecting pin 32, driver plate 50 front ends have locating hole 2 52, driver plate 50 front ends stretch in dead bolt 30, driver plate 50 is set on connecting pin 32 by locating hole 2 52, between driver plate 50 and dead bolt hook 40, be provided with spring 70, the front end of described driver plate 50 is provided with spring fastening 53, spring 70 one end are fixed on spring fastening 53, dead bolt 30 middle parts are provided with the opening bearing pin 33 that runs through dead bolt 30, the other end of hook tongue main body 41 offers locating hole 3 44, above-mentioned dead bolt hook 40 is set in opening bearing pin 33f by locating hole 3 44 and take opening bearing pin 33 and rotates as axle center, spring 70 other ends are connected with opening bearing pin 33.

By the locating hole 1 on driver plate 50 and locating hole 52 by driver plate 50 and dead bolt 30 with turn round circle 60 and be flexibly connected, and by spring 70 spring fastening on connection for transmission plates 50 and the fixing opening bearing pin 33 of dead bolt hook 40 respectively, turn round circle 60 o'clock, driver plate 50 is controlled the opening and closing of moving axially of dead bolt 30 and dead bolt hook 40 simultaneously, it is simple in structure, use more conveniently, theftproof performance is stronger.

As shown in Figure 2 and Figure 3, dead bolt hook 40 comprises hook tongue main body 41 and the hook tongue 42 being bent to form by hook tongue main body 41 one end, hook tongue main body 41 tilts and offers the bar v notch v 43 being extended to hook tongue 42 1 sides by hook tongue main body 41 middle parts, dead bolt 30 middle parts axially offer bar hole 31, and lock housing 20 front ends are provided with and run through the dead bolt pin 25 of lock housing 20 and dead bolt pin 25 simultaneously through bar v notch v 43 and bar hole 31.

As shown in Figure 4, bar hole 43 is divided into the first breach 43a, the second breach 43b, the 3rd tri-of breach 43c part, the first breach 43a is positioned at the axial middle part of hook tongue main body 41 and to extending with a side of hook tongue 42 relative directions, the locating hole 3 44 of the first breach 43a next-door neighbour dead bolt hook 40, the second breach 43b is the first breach 43a and being extended by side direction hook tongue 42 1 sides of hook tongue 42 relative directions immediately, angle between the second breach 43b and the first breach 43a is obtuse angle, the 3rd breach 43c is the second breach 43b immediately, the 3rd breach 43c is near the edge of hook tongue main body 41 parallel with the edge of hook tongue main body 41, angle between the 3rd breach 43c and the second breach 43b is obtuse angle.

Bar hole 43 is extended to the 3rd breach 43c at hook tongue main body 41 edges successively by the first breach 43a at hook tongue main body 41 middle parts, dead bolt pin 25 is fixed in the dead bolt pin-and-hole 25a of enclosing cover 1 and enclosing cover 2 22 through bar hole 31 and bar hole 43, when turning round circle 60 when rotating and driving driver plate 50 to move, under the drag effect of dead bolt pin 25, driver plate 50 drives hook tongue main body 41 to move according to the shape of bar hole 43, and control opening and closing of dead bolt hook 40, when dead bolt 30 stretches out and enter in dead bolt hole, dead bolt hook 40 opens and stretches out the relative both sides that dead bolt 30 is outside and pin dead bolt hole simultaneously, make the latching force of dead bolt 30 integral body balanced, the integrated anti-theft effect of safe-guard door lock strengthens.

As shown in Figure 3, on dead bolt 30 front end sides, axially offer the capable slide opening 1 of bar, the capable slide opening 1 of bar is extended to the middle part of dead bolt 30 by the front end of dead bolt 30, dead bolt hook 40 moves axially in the interior movement of the capable slide opening 1 of bar with dead bolt 30, dead bolt 30 rear end side axial offer the capable slide opening 2 35 of bar, and driver plate 50 is with turning round circle 60 rotation in the interior movement of the capable slide opening 2 35 of bar.

On the side of dead bolt, offer the capable slide opening 1 of bar and the capable slide opening 2 35 of bar, so can dwindle dead bolt, the volume of safe-guard door lock integral body even, make safe-guard door lock compact overall structure, and guarantee that dead bolt hook 40 and driver plate 50 have sufficient mobile space and guarantee that dead bolt hook 40 and driver plate 50 can not rub with dead bolt 30 or lock housing 20 in the situation that of dead bolt 30 small volume, and the capable slide opening 1 of bar has limited the movement locus of dead bolt hook 40 with driver plate 50 with the capable slide opening 2 35 of bar, make dead bolt hook 40 and the driver plate 50 can be not up and down or left and right play, guaranteed dead bolt 20, the normal movement of dead bolt hook 40 and the normal use of safe-guard door lock.

As shown in figures 1 and 3, lock housing 20 comprises enclosing cover 1 and enclosing cover 2 22, on the rear end end face of enclosing cover 1 and enclosing cover 2 22, offer grappling pin-and-hole 26a, in grappling pin-and-hole 26a, anchor pin 26 is installed, above-mentioned dead bolt 30, driver plate 50, turn round circle and 60 be installed between shell 1 and shell 2 22, one end of anchor pin 26 is provided with screw 27, anchor pin 26, is finally passed through screw 27 and is fixed with grappling pin-and-hole 26a on shell 2 22 and shell 1 is connected with on shell 2 22 through shell 1.

By screw 27, with anchor pin 26, enclosing cover 1 is connected with enclosing cover 2 22, makes safe-guard door lock integral disassembly, assembly convenient, be convenient to the maintenance of lock body internal fault and the replacing of interior each component of lock body.

As shown in Figure 3, enclosing cover 1 extends bandy pinch plate 28 with enclosing cover 2 22 front ends, on fixed head 10, be provided with corresponding fixing hole 12, fixing hole 12 arranged outside have storage tank 11, pinch plate 28 through the rear bending of fixing hole 12, enter in storage tank 11 and pinch plate 28 with fixed head 10 in same plane, the arranged outside of fixed head 10 has decoration panel 80, on fixed head 10, offer installing hole 1, on decoration panel 80, be provided with installing hole 2 81, screw is fixedly mounted on decoration panel 80 and fixed head 10 on security door through installing hole 1 and installing hole 2 81.

Pinch plate 28 is fixedly connected with lock housing 20 through fixing hole 12 with fixed head 10, make fixed head 10 and lock housing 20 easy to assemble, pinch plate 28 through the rear bending of fixing hole 12 and with fixed head 10 in same plane, so, decoration panel 80 and the fixing laminating of fixed head 10, decoration panel 80 can not produce gap with fixed head 10 is middle, has improved the precision of safe-guard door lock, has strengthened the theftproof performance of safe-guard door lock.

As shown in Figure 3, on a side of enclosing cover 1, offer bayonet socket 29a, enclosing cover is correspondingly provided with fixture block 29 on 2 22 1 sides, and fixture block 29 snaps in bayonet socket 29a, prevents that enclosing cover 1 and enclosing cover 2 22 from axially dislocation occurring.

The utility model is four steps at mounting method, the first step is by two overlapping dead bolt 30 inside that are placed in of dead bolt hook 40, two hook tongues 42 are towards the outer placement of lock housing 20 and guarantee that hook tongue 42 can stretch out beyond the capable slide opening 1 of bar, successively through the cotter-pin hold 33a of dead bolt 30 and the locating hole 3 44 of two dead bolt hooks 40, two dead bolt hooks 40 are flexibly connected with dead bolt 30 opening bearing pin 33.

Second step, the rear end of driver plate 50 is set on one of them alignment pin 62 by locating hole 1, the two ends of all alignment pins 62 are arranged on respectively to two and turn round interior adjacent being oppositely arranged of connection bearing 63 that also guarantees to turn round circle 60 of corresponding dowel hole 64 on circle 60, the front end of driver plate 50 is placed in to dead bolt 30 inside through the capable slide opening 2 35 of bar, by connecting pin 32, successively through the connection pin-and-hole 32a of dead bolt 30 and the locating hole 2 52 of driver plate 50 front ends, the rear and front end that makes driver plate 50 is respectively with dead bolt 30 with turn round circle 60 and be flexibly connected.

The 3rd step, the dead bolt 30 that installation is connected, driver plate 50, turning round circle 60 is arranged in enclosing cover 1 (or enclosing cover 2 22), by turning round circle 60 through the erection support 24 of enclosing cover 1 (or enclosing cover 2 22) and being arranged on, turn round in hole 23, dead bolt pin 25 is arranged in the dead bolt pin-and-hole 25a of enclosing cover 1 (or enclosing cover 2 22) through one end of bar hole 31 and bar v notch v 43 and dead bolt pin 25 successively, anchor pin 26 is arranged in grappling pin-and-hole 26a, then by corresponding being connected with mounted enclosing cover 1 (or enclosing cover 2 22) of enclosing cover 2 22 (or enclosing cover 1), grappling pin-and-hole 26a by screw 27 through enclosing cover 2 22 is threaded with the rear end of anchor pin 26 and enclosing cover 1 and enclosing cover 2 22 is fixed.

The 4th step, enclosing cover 1 and the pinch plate 28 of enclosing cover 2 22 front ends are passed to the fixing hole 12 of fixed head 10, then pinch plate 28 bendings made pinch plate 28 enter in storage tank 11 and guarantee that pinch plate 28 and fixed head 10 are in same plane, finally by screw successively through installing hole 2 81 and installing hole 1, decoration panel 80 is arranged on the external surface of fixed head 10 and this safe-guard door lock is installed on security door.

The operating principle that is drawn a kind of safe-guard door lock of the utility model by above-mentioned embodiment is as follows, and this safe-guard door lock is arranged on a body, the corresponding dead bolt hole that holds dead bolt 30 that is provided with on doorframe or door pocket.

When door is shut, the original state of this safe-guard door lock is non-lockup state, dead bolt hook 40 is positioned at dead bolt 30 inside, dead bolt 30 is positioned at lock housing 20, now key is put in and turn round circle 60 turn round in hole 61, the key that turns clockwise also drives turns round circle 60 rotations, driver plate 50 turn round circle 60 rotation under drive dead bolt 30 to move axially to lock housing 20 front ends, dead bolt 30 is in moving process, spring shortens constantly accumulation elastic force and discharges elastic force, then promoting dead bolt hook 40 moves to the same direction of lock housing 20 in dead bolt 30 inside, now due to the movement of dead bolt hook 40, the 3rd breach 43c on dead bolt hook 40, the second breach 43b passes through dead bolt pin 25 successively, dead bolt hook 40 constantly opens, when turning round circle 60 and turn to adjacent alignment pin 62 places and driver plate 50 and be resisted against on adjacent alignment pin 62, dead bolt 30 stretches out lock housing 20 outsides completely and enters in dead bolt hole, the first breach 43a moves to dead bolt pin 25 places and dead bolt hook 40 is maximum opening angle, now the hook tongue 42 of dead bolt hook 40 stretches out dead bolt 30 outsides and the relative both sides of dead bolt hole is pinned, the relative both sides of dead bolt hole are lockable, now this safe-guard door lock is in lockup state, the axial latching force of dead bolt 30 is balanced, the safe-guard door lock of more traditional single-bolt hook, its theftproof performance strengthens, and intensity is higher.

While opening this safe-guard door lock, dead bolt 30 is positioned at dead bolt hole, the relative both sides that dead bolt hook 40 pins dead bolt hole, now key is put in and turn round circle 60 turn round in hole 61, circle 60 rotations are turned round in inhour screw key drive, driver plate 50 turn round circle 60 rotation under drive dead bolt 30 to move axially to lock housing 20 rear ends, dead bolt 30 is in moving process, spring 70 is elongated and accumulates elastic force, when reaching maximum pull, spring 70 discharges elastic force, dead bolt hook 40 moves to the rear end of lock housing 20 with dead bolt 30 under the elastic force effect of spring 70, dead bolt hook 40 is in moving process, the first breach 43a on dead bolt hook 40, the second breach 43b, the 3rd breach 43c passes through dead bolt pin 25 successively, when turn round circle 60 rotation make driver plate 50 be resisted against away from the alignment pin 62 of driver plate 50 on time, dead bolt pin 25 is in the 3rd breach 43c, now dead bolt 30 integral body under the drive of driver plate 50 enters lock housing 20 inside, dead bolt hook 40 is also minimum angles by maximum opening angle closure and is retracted into dead bolt 30 inside, now this safe-guard door lock is in non-lockup state, safe-guard door lock is opened.

Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Claims (9)

1. a safe-guard door lock, comprise fixed head (10), lock housing (20) and dead bolt (30), fixed head (10) is connected with lock housing (20) front end, dead bolt (30) is arranged on lock housing (20) inside and can moves axially, it is characterized in that: two symmetrically arranged dead bolt hooks (40) are installed in dead bolt (30), on dead bolt hook (40), be provided with hook tongue (42), lock housing (20) rear end is provided with the twisting assembly that runs through lock housing (20) and rotate, twisting assembly and dead bolt (30), dead bolt hook (40) is connected, and control dead bolt (30) and pass in and out in lock housing (20), hook tongue (42) stretches out outside lock housing (20) and passes dead bolt (30) and stretch out outside two side with dead bolt (30), hook tongue (42) is retracted in dead bolt (30) with in dead bolt (30) retraction lock housing (20).

2. a kind of safe-guard door lock according to claim 1, it is characterized in that: described twisting assembly comprises and runs through turning round hole (23), being arranged on and turning round upper and two of being parallel to each other in hole (23) and turn round circle (60) and driver plate (50) of lock housing (20), turn round circle (60) middle part and be provided with coaxial jack (61), two turn round circle (60) is fixedly connected with, described driver plate (50) rear end and two is turned round circle (60) and is flexibly connected and is positioned at two and turn round between circle (60), and driver plate (50) front end is flexibly connected with dead bolt (30) and dead bolt hook (40) respectively.

3. a kind of safe-guard door lock according to claim 2, it is characterized in that: described in turn round circle (60) one end outward radial extend and connect bearing (63), above-mentioned alignment pin (62) is installed in and connects on bearing (63), in lock housing (20), be positioned at and turn round the erection support (24) that the periphery in hole (23) is provided with, the described circle (60) of turning round is arranged on and turns round in hole (23) and connect bearing (63) to be resisted against erection support (24) upper, described in to turn round hole (23) coaxial with jack (61).

4. a kind of safe-guard door lock according to claim 1, is characterized in that: described driver plate (50) has the connecting portion (50a) of an arc, and the two ends of connecting portion (50a) are connected with rear end with the front end of driver plate (50) respectively.

5. according to a kind of safe-guard door lock described in claim 1 or 2 or 3 or 4, it is characterized in that: described dead bolt hook (40) comprises hook tongue main body (41) and the above-mentioned hook tongue (42) being bent to form by hook tongue main body (41) one end, in hook tongue main body (41), offer bar v notch v (43), described dead bolt (30) middle part axially offers bar hole (31), and lock housing (20) front end is provided with and runs through the dead bolt pin (25) of lock housing (20) and dead bolt pin (25) successively through bar v notch v (43) and bar hole (31).

6. a kind of safe-guard door lock according to claim 5, it is characterized in that: on dead bolt (30) front end side, axially offer the capable slide opening one (34) of bar, above-mentioned dead bolt hook (40) is mobile with moving axially in the capable slide opening one (34) of bar of dead bolt (30), dead bolt (30) rear end side axial offers the capable slide opening two (35) of bar, and above-mentioned driver plate (50) is mobile in the capable slide opening two (35) of bar with the rotation of turning round circle (60).

7. a kind of safe-guard door lock according to claim 6, it is characterized in that: at dead bolt (30) middle part, be provided with the opening bearing pin (33) that runs through dead bolt (30), above-mentioned dead bolt hook (40) other end is set in opening bearing pin (33) above and take opening bearing pin (33) as axle center rotation.

8. a kind of safe-guard door lock according to claim 7, it is characterized in that: between driver plate (50) and dead bolt hook (40), be provided with spring (70), the front end of driver plate (50) is provided with spring fastening (53), it is upper that spring (70) one end is fixed on spring fastening (53), and the other end is connected with opening bearing pin (33).

9. a kind of safe-guard door lock according to claim 1, it is characterized in that: described lock housing (20) is comprised of enclosing cover one (21) and enclosing cover two (22), enclosing cover one (21) is provided with bandy pinch plate (28) with enclosing cover two (22) front ends, on described fixed head (10), be provided with for the fixing hole (12) that passes of pinch plate (28), pinch plate (28) through fixing hole (12), lock housing (20) is fixedly connected with fixed head (10) and pinch plate (28) and fixed head (10) in same plane.

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