CN200989109Y

CN200989109Y - Manhole cover antitheft lock

Info

Publication number: CN200989109Y
Application number: CN 200620165238
Authority: CN
Inventors: 王宪
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-22
Filing date: 2006-12-22
Publication date: 2007-12-12
Anticipated expiration: 2016-12-22

Abstract

The utility model relates to a manhole cover anti-theft lock, comprising a lock body and a key. The lock body comprises a cover plate, a sleeve, a lock core, a lock casing, a connector, a lock tongue, a base plate and a frame, wherein the sleeve is sleeved on the lock casing and connected fixedly with the lock casing; the cover plate is sleeved on the lock core; one end of the connector passes through the cover plate, and the other end is connected fixedly with the lock tongue; the lock tongue is arranged movably on the frame; the lock casing is connected fixedly with the base plate. A hole is arranged in the lower part of the key, a return spring is arranged in the hole; the return spring is connected with a poking head. The lock core has a slot corresponding to the poking head; a spring is sleeved on the lock tongue, one end of the spring is propped on the frame and the other end is propped on the lock tongue. The utility model has the advantages of simple structure, convenient assembly, low production cost, easy operation as well as excellent safety and reliability.

Description

Anti-theft lock for inspection well cover

Technical field

The utility model relates to a kind of lockset, specifically, relates to a kind of anti-theft lock for inspection well cover.

Background technology

The stolen phenomenon of inspection shaft lid on the town road happens occasionally at present, and driving and pedestrian's safety in serious harm.For this reason, many inventors have designed the lock of inspection shaft lid, but these lock most structure more complicated, and antiseptic property is poor, and application life is short.Chinese patent CN2841887Y discloses a kind of anti-theft lock for inspection well cover, the pellet shot from a slingshot that back-moving spring is installed in lock housing and has magnetic, have the groove corresponding on the outer wall of lock core with this pellet shot from a slingshot, the part of pellet shot from a slingshot is arranged in lock housing, another part is positioned at the groove of lock core, the lower end of key is fixed with the magnet identical with pellet shot from a slingshot polarity, has the head of stirring on the key, has on the inwall of lock core with this and stirs a corresponding groove.This anti-theft lock for inspection well cover utilization is with the magnetic principle of repelling each other, and key can't duplicate, and is safe and reliable, but its shortcoming is a complex structure, the manufacturing cost height.

Summary of the invention

The purpose of this utility model provides a kind of anti-theft lock for inspection well cover of simple in structure, low cost of manufacture.

The technical scheme that realizes above-mentioned purpose is: a kind of anti-theft lock for inspection well cover, comprise lock body and key, lock body is by cover plate, sheath, lock core, lock housing, connector, dead bolt, base plate and support are formed, sheath is sleeved on the lock housing, and fixedly connected with lock housing, cover plate is sleeved on the lock core, one end of connector passes cover plate, the other end of connector is fixedlyed connected with dead bolt, and dead bolt is rack-mount movably, and lock housing is fixedlyed connected with base plate, the bottom of key has the hole, be provided with back-moving spring in the hole, be connected with on the back-moving spring and stir head, have on the lock core with this and stir the corresponding groove of head; Be set with spring on the dead bolt, an end of this spring is against on the support, and the other end is against on the dead bolt.

After adopting technique scheme, as long as cover the inspection shaft lid that installs anti-theft lock for inspection well cover, the dead bolt of anti-theft lock for inspection well cover will stretch into the lower edge of Seat for manhole cover circle under the effect of spring, just as common door lock can automatically lock, Inspection shaft cover lock is lived.When key inserts lock core, stirring head its front end under the effect of back-moving spring and can enter in the groove corresponding on the lock core in the key bottom hole, the key rotation just can drive lock core and rotate together, lock core drives the cover plate rotation again, because an end of connecting rod passes cover plate, cover plate can drive connecting rod and move, and the other end of connecting rod is fixedlyed connected with dead bolt, thereby connecting rod drives the lower edge withdrawal from the Seat for manhole cover circle of active force that dead bolt overcomes spring again, just unblank, just can take out the inspection shaft lid this moment, and it is all very convenient to lock and unblank, and need not to use magnet and pellet shot from a slingshot, not only simple in structure but also greatly reduce manufacturing cost.

Description of drawings

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

Fig. 2 is the front view at lock body of the present utility model position;

Fig. 3 is the upward view of Fig. 2;

Fig. 4 is the left view of Fig. 2;

Fig. 5 is the A-A cross-sectional schematic of Fig. 3;

Fig. 6 is the B-B cross-sectional schematic of Fig. 3;

Fig. 7 is the structural representation of lock core of the present utility model;

Fig. 8 is the upward view of Fig. 7;

Fig. 9 is for stirring the structural representation of head in the key of the present utility model;

Figure 10 is the vertical view of Fig. 9;

Figure 11 is the right view of Fig. 9;

Figure 12 is a structure of cover plate schematic diagram of the present utility model;

Figure 13 is the structural representation of front apron of the present utility model;

Figure 14 is the left view of Figure 13.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail.

Shown in Fig. 1～14, a kind of anti-theft lock for inspection well cover, comprise lock body and key 13, lock body is by cover plate 4, sheath 3, lock core 1, lock housing 2, connector 7, dead bolt 6, base plate 12 and support are formed, sheath 3 is sleeved on the lock housing 2, and fixedly connected with lock housing 2, cover plate 4 is sleeved on the lock core 1, and it is fixing by nut 5, one end of connector 7 passes cover plate 4, the other end of connector 7 is fixedlyed connected with dead bolt 6, and dead bolt 6 is rack-mount movably, and lock housing 2 is fixedlyed connected with base plate 12 by screw, the bottom of key 13 has the hole, be provided with back-moving spring 13-2 in the hole, be connected with on the back-moving spring 13-2 and stir a 13-1, have on the lock core 1 with this and stir the corresponding groove 1-1 of a 13-1; Be set with spring 16 on the dead bolt 6, an end of this spring 16 is against on the support, and the other end is against on the dead bolt 6.When theftproof lock is installed, as long as base plate 12 and support are fixed on the inspection shaft lid 14.

Shown in Fig. 7,8,12, the lower end of lock core 1 is flat filament bar 1-2, has the profiled holes 4-1 that cooperates with this flat filament bar 1-2 on the cover plate 4.Adopt this structure, lock core 1 can directly drive cover plate 4 and reverse, and need not by means of flat key, and is simple in structure, installs also very convenient.

Shown in Fig. 1,4,5,13,14, described support is made up of screw rod 10, housing 9, front apron 11 and backboard 8, screw rod 10 is fixedlyed connected with base plate 12, and housing 9 solids are installed on the screw rod 10, and front apron 11 and backboard 8 are separately fixed at the front-end and back-end of housing 9.The rear end of dead bolt 6 upper springs 16 is against on the backboard 8, and front end is against on the shoulder of dead bolt 6.The front end of dead bolt 6 has inclined-plane 6-1, helps the front apron 11 that dead bolt 6 stretches out housing 9 front ends.

Shown in Fig. 2,13,14, the front end napex of dead bolt 6 is the plane, has the profiled holes 11-1 that allows dead bolt 6 front ends pass on the front apron 11.Adopt this structure can increase the contact area of dead bolt 6 tops and Seat for manhole cover circle 15 lower edges, improve coupling mechanism force, increase the reliability of lockset.

Shown in Fig. 4,5, have tank filler sleeve on the housing 9, stifled on the tank filler sleeve have silently 17.Can in housing 9, add machine oil by tank filler sleeve and prevent that the spring 16 in the housing from getting rusty, guarantee the dependable performance of spring 16.Stifled upper baffle 7 can prevent leakage of oil.

Operating principle of the present utility model is as follows: cover the inspection shaft lid that installs anti-theft lock for inspection well cover, the dead bolt 6 of anti-theft lock for inspection well cover will stretch into the lower edge of Seat for manhole cover circle 15 under the effect of spring 16, just as common door lock can automatically lock, inspection shaft lid 14 is pinned.When key 13 inserts lock core 1, stirring a 13-1 its front end under the effect of back-moving spring 13-2 and can enter 1-1 in the groove corresponding on the lock core 1 in key 13 bottom holes, key 13 rotations just can drive lock core 1 and rotate together, lock core 1 drives cover plate 4 rotations again, because an end of connecting rod 7 passes cover plate 4, cover plate 4 can drive connecting rod 7 and move, and the other end of connecting rod 7 is fixedlyed connected with dead bolt 6, thereby connecting rod 7 drives the lower edge withdrawal from Seat for manhole cover circle 15 of active force that dead bolt 6 overcomes spring 16 again, just unblank, just can take out the inspection shaft lid this moment, and it is all very convenient to lock and unblank.Head such as Fig. 9,10,11 of stirring a 13-1 are depicted as the circular arc head, and when extracting key 13, the head of stirring a 13-1 overcomes in the active force withdrawal hole of back-moving spring 13-2 under external force, can extract key 13 easily.

Claims

1, a kind of anti-theft lock for inspection well cover, comprise lock body and key (13), lock body is made up of cover plate (4), sheath (3), lock core (1), lock housing (2), connector (7), dead bolt (6), base plate (12) and support, sheath (3) is sleeved on the lock housing (2), and fixedly connected with lock housing (2), cover plate (4) is sleeved on the lock core (1), one end of connector (7) passes cover plate (4), the other end of connector (7) is fixedlyed connected with dead bolt (6), dead bolt (6) is rack-mount movably, lock housing (2) is fixedlyed connected with base plate (12), it is characterized in that:

The bottom of a, key (13) has the hole, is provided with back-moving spring (13-2) in the hole, is connected with on the back-moving spring (13-2) to stir head (13-1), has on the lock core (1) with this to stir head (13-1) corresponding groove (1-1);

Be set with spring (16) on b, the dead bolt (6), an end of this spring (16) is against on the support, and the other end is against on the dead bolt (6).

2, anti-theft lock for inspection well cover according to claim 1 is characterized in that: the lower end of lock core (1) is flat filament bar (1-2), has the profiled holes (4-1) that cooperates with this flat filament bar (1-2) on the cover plate (4).

3, anti-theft lock for inspection well cover according to claim 1 and 2, it is characterized in that: described support is made up of screw rod (10), housing (9), front apron (11) and backboard (8), screw rod (10) is fixedlyed connected with base plate (12), housing (9) solid is installed on the screw rod (10), and front apron (11) and backboard (8) are separately fixed at the front-end and back-end of housing (9).

4, anti-theft lock for inspection well cover according to claim 3 is characterized in that: the front top of dead bolt (6) is the plane, has the profiled holes (11-1) that allows dead bolt (6) front end pass on the front apron (11).

5, anti-theft lock for inspection well cover according to claim 3 is characterized in that: housing has tank filler sleeve on (9), and blocking up on the tank filler sleeve has silently (17).