CN201214926Y

CN201214926Y - Primary-secondary lock and key thereof

Info

Publication number: CN201214926Y
Application number: CNU2008200704921U
Authority: CN
Inventors: 李国栓
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-13
Filing date: 2008-05-13
Publication date: 2009-04-01
Anticipated expiration: 2018-05-13

Abstract

The utility model discloses a primary-secondary lock and a key thereof. The primary-secondary lock comprises a lock shell, a lock core, a bolt and a lock cover. The lock cover is fixedly connected with the lock shell; a lock hole and a locating slot are arranged on the lock cover; and the bolt is fixed on the end part of the lock core. The primary-secondary lock also comprises a hook switch. A separation jaw and a contact piece are arranged on the hook switch, the hook switch is hinged with the lock shell through a fixed pin, a torsion spring is arranged on the fixed pin, one end of the torsion spring is connected with the lock shell, and the other end of the torsion spring is connected with the hook switch; the lock core is cylindrical, a protruding ring is arranged at the center of the lock core, a press spring is coated on the lock core, one end of the press spring is connected with the lock shell and the other end of the press spring is connected with the protruding ring, a start-up block is arranged on the lock core and an external spline is also arranged on the lock core, a locking slot and a locating slide-slot are arranged on the protruding ring, the locating slide-slot is T-shaped, a locating pin is also arranged on the lock shell, one end of the locating pin is arranged in the locating slot, and the separation claw on the hook switch is connected with the locking slot. The bolt and the lock core of the primary-secondary lock ensure double-security locking by the hook switch and the locating pin, thereby, the reliability is largely improved.

Description

Primary and secondary lock and key thereof

Technical field

The utility model belongs to lock, relates in particular to a kind of primary and secondary lock and key thereof that is used on the distribution box.

Background technology

At present, newspaper case, milk much all use primary and secondary lock on the case, and each user takes the key operated own case of son, and the milk deliverer takes mother key can open oneself responsible all milk case, and the inventor discloses so a kind of primary and secondary lock in ZL02270764.6.But this primary and secondary lock is because structure is simple relatively, so safety is not high enough.

Summary of the invention

The purpose of this utility model provides a kind of better safety performance primary and secondary lock and key thereof.

For achieving the above object, the utility model adopts following technical scheme: a kind of primary and secondary lock, comprise lock housing, lock core, dead bolt and locking closure, and locking closure and lock housing are connected, lockhole and guide slot are arranged on the locking closure, dead bolt is fixed on the end of lock core, also comprises switch hook, and disengaging pawl and contact block are arranged on the switch hook, switch hook is hinged by steady pin and lock housing, torsion spring is arranged on the steady pin, and an end and the lock housing of torsion spring are joined, and the other end and the switch hook of torsion spring join; Lock core is column, there is bulge loop at the middle part of lock core, is with stage clip on the lock core, and an end and the lock housing of stage clip are joined, the other end and the bulge loop of stage clip join, the startup piece is arranged on the lock core, also have external splines on the lock core, lock slots and positioning runner are arranged on the bulge loop, positioning runner is T-shaped, alignment pin also is housed on the lock housing, and an end of alignment pin is positioned at positioning runner, and disengaging pawl and lock slots on the switch hook join.

Lock slots and positioning runner are positioned at the both sides of bulge loop.

The main body of lock core is positioned at lock housing, and an end of lock core passes in lock housing.

The quantity that starts piece on the lock core is at least three.

Open the sub-key of described primary and secondary lock, comprise handle and key cylinder, key cylinder has directed piece outward, and there is the startup groove that matches with startup piece on the lock core key cylinder end, in the junction of key cylinder and handle thrust block is arranged.

Open the mother key of described primary and secondary lock, comprise handle and tubular key body, key body has directed piece outward, and the internal spline that matches with external splines on the lock core is arranged in the key body, at key body and handle joint thrust block is arranged.

This primary and secondary lock, dead bolt and lock core reach the dual fail-safe locking by switch hook and alignment pin.Non-private key inserts then can not open switch hook, starting piece can not off normal with the locking closure chute, thrust block can not join with locking closure, can not make and start piece on the startup groove of key and the lock core and coincide, more can not finish the corresponding opening of lock core chute intermediate openings and alignment pin, can not open this lock by above five kinds of safety measures to guarantee non-private key, thereby its safety is greatly improved.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 looks schematic diagram for the master of switch hook.

Fig. 3 is the 3-D view of lock housing.

Fig. 4 looks schematic diagram for the master of lock housing.

Fig. 5 is that the A-A of Fig. 4 is to view.

Fig. 6 is that the B-B of Fig. 4 is to view.

Fig. 7 is the 3-D view of locking closure.

Fig. 8 is that the master of locking closure looks schematic diagram.

Fig. 9 is that the C-C of Fig. 8 is to view.

Figure 10 is the 3-D view of lock core.

Figure 11 is that the master of lock core looks schematic diagram.

Figure 12 is that the E-E of Figure 11 is to view.

Figure 13 is that the D-D of Figure 11 is to view.

Figure 14 is that the master of sub-key looks schematic diagram.

Figure 15 is that schematic diagram is looked on the left side of Figure 14.

Figure 16 is that the F-F of Figure 14 is to view.

Figure 17 is the 3-D view of sub-key.

Figure 18 is that the master of mother key looks schematic diagram.

Figure 19 is that schematic diagram is looked on the left side of Figure 18.

Figure 20 is that the G-G of Figure 18 is to view.

Figure 21 is the 3-D view of mother key.

The specific embodiment

Primary and secondary lock as shown in Figure 1, comprise lock housing 1, lock core 8, dead bolt 7 and locking closure 10, locking closure 10 is connected with lock housing 1, as Fig. 7, Fig. 8, shown in Figure 9, lockhole 101 is arranged on the locking closure 10, guide slot 102 and two fixed legs 103, the main body of lock core 8 is positioned at lock housing 1, one end of lock core 8 passes in lock housing, and dead bolt 7 is fixed on the end of lock core 8 by screw 5, also comprises switch hook 4, as shown in Figure 2, disengaging pawl 42 and contact block 41 are arranged on the switch hook, and switch hook 4 is hinged by steady pin 3 and lock housing 1, and torsion spring 2 is housed on the steady pin 3, one end and the lock housing 1 of torsion spring 2 are joined, and the other end of torsion spring and switch hook 4 join.As Figure 10, Figure 11, Figure 12, shown in Figure 13, lock core is column, and there is bulge loop at the middle part of lock core, is with stage clip 6 on the lock core 7, one end and the lock housing 1 of stage clip 6 are joined, the other end and the bulge loop of stage clip 6 join, and the piece 72 of startup is arranged on the lock core, and the quantity that starts piece on the lock core is three, also has external splines 73 on the lock core, lock slots 74 and positioning runner 71 are arranged on the bulge loop, and lock slots 74 and positioning runner 71 are positioned at the both sides of bulge loop, and positioning runner 71 is T-shaped.Alignment pin 9 also is housed on the lock housing 1, and an end of alignment pin 9 is positioned at positioning runner 71, and the disengaging pawl 42 on the switch hook 4 joins with lock slots 74.

As Fig. 3, Fig. 4, Fig. 5, shown in Figure 6, two installing holes 14 that cooperate with fixed leg on the locking closure are arranged on the lock housing, the dowel hole 13 of installing and locating pin 9 is arranged, the fixedly torsion spring jack 11 of torsion spring one end is arranged, also have the pin-and-hole 12 of mount pin 3.

For guaranteeing the safety of primary and secondary lock, the quantity that starts piece on the lock core is advisable to be no less than three.

This primary and secondary lock, have the double locking state: the one, the switch hook disengaging pawl is locked lock core by the effect of torsion spring on the steady pin, the 2nd, alignment pin is inserted in the chute of lock core by lock housing, lock core rests between the alignment pin left end of its chute by the effect of stage clip, and lock core can not be rotated.

As Figure 14, Figure 15, Figure 16, shown in Figure 17, open the sub-key of primary and secondary lock, comprise handle 110 and key cylinder 112, directed piece 113 is arranged outside the key cylinder 112, there is the startup groove 114 that matches with startup piece on the lock core key cylinder end, in the junction of key cylinder and handle thrust block 111 is arranged.

As required, the internal spline 115 that matches with external splines on the lock core is being arranged on the key cylinder inwall.

As Figure 18, Figure 19, Figure 20, shown in Figure 21, open the mother key of primary and secondary lock, comprise handle 120 and tubular key body 122, directed piece 123 is arranged outside the key body 122, the internal spline 125 that matches with external splines on the lock core is arranged in the key body, thrust block 121 is arranged at key body and handle joint.

When with sub-key unlocking, the bundle key inserts lockhole, answers back to contact block 41 on the switch hook 4 by directed piece 113, by leverage switch hook is opened, and disengaging pawl 42 separates with lock core upper locking groove 74.The bundle key continues to insert inwards, son on the key startup groove 114 and after the startup piece on the lock core 72 coincide, push inward again then lock core is pushed into positioning runner 71 middle openings and alignment pin 9 corresponding positions, this moment directed piece 113 on the key inwardly surpasses locking closure, thrust block 111 also just in time joins with locking closure 10, makes sub-key can't need to push inward again.Rotate sub-key and drive lock core and dead bolt and turn 90 degrees in the lock housing inward turning and finish unlatching, the effect of handle just can not extracted and play to the sub-key of this moment, if again key reverse rotation 90 degree, stage clip then ejects key, forms lock-out state automatically.

When unblanking with mother key, mother key is inserted lockhole answer back to contact block 41 on the switch hook 4 by directed piece 123, by leverage switch hook is opened, disengaging pawl 42 separates with lock core upper locking groove 74.Mother key is continued to insert inwards, after internal spline 125 on the mother key and the external splines on the lock core coincide, push inward again then lock core is pushed into positioning runner 71 middle openings and alignment pin 9 corresponding positions, directed piece on the mother key 123 inwardly surpasses locking closures at this moment, thrust block 121 also just in time joins with locking closure 10, and the end of key body also just in time contacts with startup piece on the lock core, makes mother key can't need to push inward again.Rotation mother key drive lock core and dead bolt turn 90 degrees in the lock housing inward turning finishes unlatching, and the effect of handle just can not extracted and play to the mother key of this moment, if key reverse rotation 90 is spent, stage clip then ejects key, forms lock-out state automatically again.

Foregoing primary and secondary lock, by only changing on the lock core quantity that starts piece and differently starting the relative position of pieces and do not change the shaped position of external splines on the lock core, just can make a collection of lock, this batch lock, can open with a mother key, and can only open a lock with a bundle key.This just meets the instructions for use of the case of suckling, and a milk deliverer can open all milk casees that he manages, and each resident family can only open oneself milk case.

When having changed on the lock core behind the shaped position of external splines, then can only open the lock that matches to mother key with one, this can satisfy the instructions for use that different milk deliverers can only open self-administered milk case again.

The safety of this primary and secondary lock shows: non-private key inserts then can not open switch hook, starting piece can not off normal with the locking closure chute, thrust block can not join with locking closure, can not make to start piece on the startup groove of key and the lock core and coincide, more can not finish the corresponding opening of lock core chute intermediate openings and alignment pin.Can not open this lock by above five kinds of safety measures to guarantee non-private key.

Simultaneously, various keys form by particular manufacturing craft die casting, and are imitated then very difficult and cost is expensive.

Claims

1, a kind of primary and secondary lock, comprise lock housing, lock core, dead bolt and locking closure, locking closure and lock housing are connected, and lockhole and guide slot are arranged on the locking closure, and dead bolt is fixed on the end of lock core, it is characterized in that: also comprise switch hook, disengaging pawl and contact block are arranged on the switch hook, and switch hook is hinged by steady pin and lock housing, and torsion spring is arranged on the steady pin, one end and the lock housing of torsion spring are joined, and the other end and the switch hook of torsion spring join; Lock core is column, there is bulge loop at the middle part of lock core, is with stage clip on the lock core, and an end and the lock housing of stage clip are joined, the other end and the bulge loop of stage clip join, the startup piece is arranged on the lock core, also have external splines on the lock core, lock slots and positioning runner are arranged on the bulge loop, positioning runner is T-shaped, alignment pin also is housed on the lock housing, and an end of alignment pin is positioned at positioning runner, and disengaging pawl and lock slots on the switch hook join.

2, primary and secondary lock as claimed in claim 1 is characterized in that: lock slots and positioning runner are positioned at the both sides of bulge loop.

3, primary and secondary lock as claimed in claim 1 is characterized in that: the main body of lock core is positioned at lock housing, and an end of lock core passes in lock housing.

4, primary and secondary lock as claimed in claim 1 is characterized in that: the quantity that starts piece on the lock core is at least three.

5, open the sub-key of primary and secondary lock as claimed in claim 1, comprise handle and key cylinder, key cylinder has directed piece outward, and there is the startup groove that matches with startup piece on the lock core key cylinder end, and it is characterized in that: there is thrust block the junction at key cylinder and handle.

6, open the mother key of primary and secondary lock as claimed in claim 1, comprise handle and tubular key body, key body has directed piece outward, it is characterized in that: the internal spline that matches with external splines on the lock core is arranged in the key body, at key body and handle joint thrust block is arranged.