CN2082295U - Prizing-proof door lock with auto-alarm - Google Patents

Abstract

The utility model relates to a door lock, belonging to a door lock opened with rotary key, which mainly comprises a lock core, a shifting piece which is connected with the lock core shaft, a lock bolt and a sliding board which is connected with the lock bolt. In order to improve anti-prizing function, the lock bolt of the lock adopts two lock bolts, one end of each of which is hinged on a lock box, and the other end of each of which is hook-shaped; when the sliding board moves forwards, the lock bolt is driven to open to both sides and extend in the lock bolt; a lever is also hinged on the sliding board; the lever and the tail end of the sliding board are provided with a movable contact and a static contact; when a door is pried, the lever is pressed down and an alarm system alarms by the switching-on of the movable contact and the static contact; besides, an interlocking board with a supporting arm is arranged between the sliding board and the shifting piece; after the lock core is taken off, that the sliding board is contacted with the shifting piece is prevented by the supporting arm of the interlocking board.

Description

Prizing-proof door lock with auto-alarm

The utility model belongs to the door lock of opening with screw key.

Existing a kind of insurance lock comprises a snap close that is located on the doorframe, and one is located at lock core, the dead bolt on the door leaf and is contained in the interior dead bolt transmission mechanism of lock box.The dead bolt transmission mechanism is made up of the slide plate and the slide plate blocking mechanism that are contained in rotation plectrum on the lock box base plate, can vertically move under plectrum drives.Dead bolt and slide plate end connect firmly, and lock core shaft does not hold and inserts in the plectrum hole.Key inserts lock mandrel and drives the plectrum rotation by lock core shaft, and plectrum at first drives blocking mechanism, makes it to remove the constraint to slide plate, drives slide plate then and moves, and dead bolt is pushed and pulls out snap close.But the dead bolt direction of motion of this class lock is vertical with crack between a door and its frame, is subjected to that door leaf and doorframe gap increase after the external force, and dead bolt is easy to deviate from from snap close.Secondly, the dead bolt of this class lock all is to connect firmly as a wholely with slide plate, and the intensity of slide plate and driving member thereof is generally all lower, and dead bolt easily causes insuring its damage malfunctioning when being subjected to big external force.Chinese patent CN87207516 discloses a kind of vertical dead bolt insurance lock.Its dead bolt direction of motion is parallel with crack between a door and its frame, and on structure, it is that relative position with the plectrum of common door lock and slide plate has rotated 90 °.Though this lock has solved the problem that dead bolt is easy to deviate from when forcing open the door from snap close, its dead bolt and slide plate still connect firmly as a whole, therefore still have aforesaid shortcoming.No matter in addition, because the dead bolt of this lock is to move up and down, so whole dead bolt stretches out outside the door leaf all the time, influenced a door overall appearance, be existing common door lock or above-mentioned door lock with vertical dead bolt, do not possess warning function when door is prized.

It is good that the purpose of this utility model provides a kind of pick-proof performance, and can send the door lock of chimes of doom by sled the time.

The solution that realizes the purpose of this utility model is: the automatic warning pick-proof door lock that is provided comprise one be located at snap close on the doorframe, one be located on the door leaf lock core and in be loaded on dead bolt and dead bolt transmission mechanism in the lock box.This dead bolt transmission mechanism is by being contained in rotation plectrum on the lock box base plate, the slide plate that can vertically move and being made up of the slide plate blocking mechanism that plectrum drives under plectrum driving.Lock core shaft does not hold in the hole of inserting plectrum.One of improvement of the present utility model is to have adopted two dead bolts, they lay respectively at the slide plate both sides, the one end is hinged on the lock box, another free end is a hook-type, the dead bolt middle part has groove, the projection that the nose is two jiaos places in this groove, so will drive two dead bolts around the swing of its hinge when slide plate moves, makes the hook end of dead bolt stretch in the snap close two side holes or withdraws from snap close.Two of improvement of the present utility model is hinged levers on slide plate, and the lever front end extends lengthwise into the lock box limit and prolongs, and lever rear end is provided with moving contact, and slide plate is provided with static contact, and dynamic and static contact has been formed a switch, and links to each other with alarm by lead.When dead bolt stretched in the snap close, the front end of lever also entered in the snap close together.In case door is prized, and deforms or displacement, the lever front end is depressed, and alarm is connected, and sent chimes of doom.Three of improvement of the present utility model is the springs that are provided with an interlock plate that can vertically move with the plectrum corresponding position and vertically force in interlock plate on lock box, and this interlock plate is provided with the location support arm of vertical support arm that can insert slide plate and plectrum span district and and lock core shaft's contacts side surfaces.Under normal circumstances the vertical support arm of interlock plate is away from the spacer region between slide plate and plectrum, so do not influence the motion of plectrum.In case lock core is taken down, interlock plate location support arm has lost the dependence of lock core shaft, and interlock plate vertically moves under the spring force effect, and its vertical support arm inserts between slide plate and plectrum, with both blocking-up, therefore lock can not be opened if insert lock core hole with band rib rod member from the outside.

Therefore advantage of the present utility model is: dead bolt is made circular motion, has both that vertical snap close is difficult for threading off and horizontal dead bolt does not stretch out outdoors advantage; Because dead bolt is to separate other part, and is hinged on the lock box, so that dead bolt bears the ability of external force is bigger.Mainly stressed by sled the time by dead bolt, little to the influence of driving member, the integrality of having saved lock from damage; Owing to be provided with interlock plate, therefore can prevent to destroy the situation that lock core is forced open the door.In addition, this door lock promptly sends warning in quilt sled process, takes the photograph sense from giving a kind of prestige of the person of forcing open the door mentally.

Below in conjunction with accompanying drawing content of the present utility model is described in detail.

Fig. 1 is overall structure figure of the present utility model, and dead bolt is in retracted state among the figure.

Fig. 2 is the state diagram of dead bolt when opening.

Fig. 3 is that A among Fig. 2 is to partial view.

Fig. 4 is the state diagram after interlock plate moves.

As shown in Figure 1, the middle part of slide plate 1 has a rectangle chute 2, and this chute 2 is enclosed within on the axis 4 of lock box 3.Also stamp out two horizontal clamps 5 on the slide plate 1.The latch plate 7 that has internal tooth 6 is inserted in the clamp 5, and its internal tooth 6 also is stuck in the outside of axis 4, and intersects with slide plate chute 2, limits moving of slide plate 1.Be provided with holddown spring 9 between the flanging 8 of clamp 5 and slide plate 1.Plectrum 10 is located on the lock box base plate and (does not draw among the figure).The not end of lock core shaft 11 is square, inserts in the square hole of plectrum 10.When key drove lock core shaft's 11 rotations, plectrum 10 rotated thereupon.Because slide plate 1 side has triangular groove 12, so it is traversing along clamp 5 that the projection 13 on the plectrum 10 drives latch plate 7 earlier, when its internal tooth 6 leaves slide plate chute 2, after having removed the constraint to slide plate 1, plectrum projection 13 just in time forwards the left end of slide plate triangular groove 12 to, moves to left so drive slide plate 1, slide plate 1 moves to left behind the certain distance, latch plate 7 is return under the effect of spring 9, and its internal tooth 6 blocks axis 4 again, with slide plate 1 location.This door lock is provided with two dead bolts 14, and they are positioned at the both sides of nose, and the one end is hinged on the lock box 3, and the other end is a hook-type.The dead bolt middle part has a groove 15, and two circular protrusions 16 of nose place groove 15 respectively.As shown in Figure 2, when slide plate 1 reach, slide plate projection 16 drives dead bolt 14 rotations, opens to both sides, and the dead bolt hook end is extend in the hole of snap close 17 both sides.When moving behind the slide plate 1, dead bolt 14 retracts in the lock box again.

The alarm mechanism of door lock is made up of the static contact 20 and the alarm 21 that are hinged on the bar thick stick 18 on the slide plate 1, the moving contact 19 that is located at lever 18 tail ends and slide plate tail end.At the torsion spring 23 that has to force between slide plate and the lever on the hinge 22.As shown in Figure 3, when dead bolt 14 stretched in the snap close 17, lever 18 front ends also entered in the snap close.Be subjected under the little situation of external force at door lock, as owner open the door or other people when knocking at the door, lever 18 front ends can not be depressed or the distance that moves less, dynamic and static contact does not contact; When forcing open the door, lever 18 front ends are depressed by force by snap close 17, dynamic and static contact contact, and alarm 21 sends the sound.The width of lever 18 fore-ends can be designed to be slightly less than two dead bolts distance between its inboard when opening.(see figure 2).Like this, when lever 18 fore-ends are depressed, just in time be stuck between two dead bolts 14, dead bolt can't be bounced back, further strengthened tamper-resistant function.

Left side corresponding to plectrum 10 on lock box 3 also is provided with an interlock plate 24, have a chute 25 to be stuck on the alignment pin 26 on the interlock plate 24, so interlock plate 24 can vertically move.There are a vertical support arm 27 and lateral arms 28 and one to hang over the spring 29 of 26 of interlock plate and alignment pins on the interlock plate 24.Lateral arms 28 leans against lock core shaft 11 left sides, vertically prolongation place of support arm 27 septal area between slide plate 1 and plectrum 10 square holes, under normal circumstances, because lateral arms 28 is all the time against lock core shaft 11, vertically support arm 27 can not be sealed getting in touch of slide plate 1 and latch plate 7 and plectrum 10, in case lock core is taken down, as shown in Figure 4: interlock plate lateral arms 28 loses dependence, under the effect of spring 29, interlock plate 24 moves to right, its vertical support arm 27 can't contact plectrum projection 13 with slide plate 1 slide plate 1 and the blocking-up of plectrum hole with latch plate 7.Even therefore with being with rib rod member insertion lock core hole can not drive plectrum lock is being opened outdoors.

The open and close door is convenient when owner is in, and insurance spring bolt mechanism in the elasticity can be set on the lock box 3, and its structure is identical with existing ordinary elasticity dead bolt.It mainly is made up of the limiting plate 34 and the hand button 35 of dead bolt 30, back-moving spring 31, spring base 32, band flanging 33.When the flanging 33 of limiting plate 34 and dead bolt bar 36 are parallel, dead bolt 30 retractables.With the limiting plate half-twist, its flanging 33 withstands dead bolt bar 36 by hand button 35, and dead bolt can't be bounced back, insurance in realizing.

Claims (2)

1, a kind of automatic warning pick-proof door lock, comprise one be located at snap close 17 on the doorframe, one be located on the door leaf lock core and in be loaded on dead bolt 14 and dead bolt transmission mechanism in the lock box, this dead bolt transmission mechanism is made up of the blocking mechanism of the slide plate 1 that is contained in rotation plectrum 10 on the lock box base plate, the slide plate 1 that can vertically move and is driven by plectrum 10 under plectrum 10 drives, lock core shaft 11 does not hold in the hole of inserting plectrum 10, it is characterized in that:

1) said dead bolt 14 has two, and they are positioned at slide plate 1 both sides, and the one end is hinged on the lock box 3, and another free end is a hook-type, and dead bolt 14 middle parts are fluted 15, and the projection 16 that slide plate 1 front end is two jiaos places in this groove 15,

2) hinged lever 18 on slide plate 1, lever 18 front ends extend lengthwise into the lock box edge, and lever 18 rear ends are provided with moving contact 19, slide plate 1 is provided with static contact 20, and dynamic and static contact links to each other with alarm 21 by lead,

3) be provided with an interlock plate that can vertically move 24 with plectrum 10 corresponding positions on lock box 3 and vertically force in the spring of interlock plate 24, interlock plate 24 is provided with the location support arm 28 of vertical support arm 27 that can insert slide plate 1 and plectrum 10 span districts and and lock core shaft's 11 contacts side surfaces.

2, door lock as claimed in claim 1, the width that it is characterized in that lever 18 fore-ends are slightly less than two dead bolts 14 distance between its inboard when opening.

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