CN203188706U - Engineering lock - Google Patents

Abstract

The utility model discloses an engineering lock, comprising a lock shell (1), a rotatable lock core (2) being arranged in the lock shell (1), a key hole (21) and a blade groove (22) being arranged in the lock core (2), a blade group (3) being arranged in the blade groove (22), and the utility model is characterized in that: the blade group (3) comprises an engineering blade (3a), a destructive structure (34) is arranged on the engineering blade (3a), before the destructive structure (34) is destroyed, both an engineering key and a user key can unlock the blade group (3), and after the destructive structure (34) is destroyed, only the user key can unlock the blade group (3) and rotate the lock core (2), and a rebound device (4) capable of pushing the blade group (3) to return to its original position is also arranged in the lock core (2).

Description

Engineering lock

【Technical field】

The utility model relates to an engineering lock. the

【Background technique】

When people buy a new house, they usually ask a decoration company to come to them for decoration. During the decoration period, they must give the key of the house to the decoration personnel. Everyone knows that the engineering lock is divided into two keys: the user key and the engineering key. The engineering key is given to the decoration personnel, and the user key remains. It is for the user to use. After the house decoration is completed, the owner uses the user key to open the door once, and the engineering key becomes invalid and can no longer open the door. the

Chinese patent CN200610082172.3 discloses an anti-technical and anti-damage engineering lock head, which is provided with engineering pins in the lock end of the lock cylinder, or in the lock end with pins, and the end face of the pins on the engineering pins that is in contact with the key is placed on the key. In the through hole, or placed in the annular groove hidden in the lock shell, that is, the baffle, and if the passage hole, there are two grooves on the project pin that are in contact with the same hole on the spring piece, or in contact with the limit rod The other end of the project pin is in contact with the spring, or with the special bolt, the engineering bolt that locks the rotation of the lock cylinder, and the spring in sequence; the engineering key is used by the decoration workers, and the special key is used by the head of the household. the

Existing engineering locks are all realized by the structure of springs and pins. This structure is very inconvenient to install, and the process is complicated, resulting in great cost, and the anti-theft performance is not strong. the

【Content of utility model】

In order to solve the deficiencies in the prior art, an engineering lock with convenient installation, simple process, low cost and strong anti-theft performance is provided. The technical scheme that the utility model adopts is:

The engineering lock head includes a lock shell, a rotatable lock cylinder is arranged in the lock shell, a key hole and a blade groove are arranged in the lock cylinder, and a blade group is placed in the blade groove , engineering blades are included in the blade group, and a destruction structure is provided on the engineering blades. Before the destruction structure is destroyed, both the engineering key and the user key can untie the blade group, and after destruction Only the user key can be used to unlock the destructive structure of the rotating lock cylinder of the blade group, and a rebound device that can push the blade group to reset is also provided in the lock cylinder. the

The engineering blade is used to replace the existing pin and the spring to realize the function of the engineering lock. The processing is simple, the safety is high, and it is easy to realize and easy to assemble, so that the production cost is greatly reduced. the

A channel for key insertion is provided on the blade group, a gap is provided at the bottom of the blade group, and a number plate that cooperates with the teeth on the key to unlock is provided on the inner wall of the channel. The upper part of the blade group is provided with a flange. the

The destruction structure is arranged on the inner wall of the channel of the engineering blade that is in contact with the side of the key. the

The damage structure is a convex structure. the

The junction between the raised structure and the inner wall of the channel is provided with a gap that is easy to damage the raised structure. the

The convex function is equivalent to the number plate, and it cooperates with the tooth shape of the key to play a positioning role. In the engineering blade, the convex is matched with the toothless side of the key. Since the width of the toothless side of the engineering key and the user key is the same, through the convex After positioning, the engineering blade is just in the unlocking position, and the number piece on the engineering blade that matches the tooth profile on the key is in the gap between the tooth profiles, so as to ensure that the key is not blocked after being inserted, and at the same time ensure that the engineering blade is in the unlocking position . the

A groove is provided in the lock housing, and a side pin that clamps the blade group and cooperates with the notch is provided in the groove, and a side pin that can be lifted up and completely entered into the lock cylinder to realize unlocking elastic piece. the

The rebound device is a spring. the

One end of the spring presses against the inner wall of the lock cylinder, and the other end presses against the flange on the top of the blade group. the

The engineering lock adopting the above structure only needs to add a small protrusion on the blade of the original lock core, because the number plate on it will not work on the user key and the engineering key at the same time, and the number buckle will be compatible with the user key and the engineering key after removing the protrusion. The engineering lock does not cooperate to realize anti-theft. The structure is simple, the processing is convenient, the installation is fast, the manufacturing cost is low, and multiple groups can be used to increase the anti-theft coefficient and enhance the anti-theft function. the

【Description of drawings】

Fig. 1 is an exploded view of the lock end of the present utility model. the

Fig. 2 is a structural view of a single blade in the blade group of the present invention. the

Fig. 3 is a structural view of the engineering blade of the utility model. the

Fig. 4 is the cooperation view of the engineering blade of the utility model and the key. the

【Detailed ways】

The engineering lock shown in Figure 1 includes a lock case 1, in which a rotatable lock cylinder 2 is provided, a key hole 21 and a blade groove 22 are arranged in the lock cylinder 2, and in the blade groove 22, a Blade set 3. As shown in Fig. 2, a channel 32 for inserting the key is provided on the blade group 3, a gap 31 is provided at the bottom of the blade group 3, and a tooth shape matching with the key is provided on the inner wall of the channel 32. The unlocked number piece 33 is provided with a flange on the top of the blade set 3 . A groove 11 is provided in the lock housing 1, and a side pin 5 for clamping the blade 3 and an elastic member 6 that can lift up the side pin 5 and make it fully enter the lock cylinder 2 to realize unlocking are also provided. Part 6 is a shrapnel, including engineering blade 3a in the blade group 3, as shown in Figure 3, a destruction structure 34 is provided on the engineering blade 3a, before the destruction structure 34 is destroyed, the engineering key and the user key All can untie the vane group 3, and only use the user's key to untie the destruction structure 34 of the vane group 3 to rotate the lock cylinder 2 after the destruction, and the rebound device 4 that can push the blade group 3 to reset is also provided in the lock cylinder 2. the

Engineering blade 3a as shown in Figure 3, above-mentioned destruction structure 34 is convex structure, and described convex structure and channel 32 inner wall joints are provided with the notch that is easy to be that the protruding structure destroys, and the notch is chamfered and The acute angle makes the cross-section of the joint between the protrusion and the inner wall smaller, which makes it easy to destroy the protrusion, so that the protrusion is easily separated from the inner wall of the channel. the

As shown in Figure 4, the view of engineering blade 3a cooperating with the starting key, the described starting key is to set up a small protrusion 34 contact side with engineering blade 3a on the basis of the user key, which can turn the entire protrusion 34 small holes inserted therein. the

Principle and working process:

The engineering lock is equipped with two keys: the engineering key and the user key. The tooth shape of the engineering key and the user key are different, and there is also a starting key (the starting key is the user key, but there is a key on the side wall of the user key. hole). After the user's key and the engineering key are inserted into the engineering lock, engineering blades 3a are arranged at the different places of the tooth type. Can play a role (promptly protruding replaces number plate and cooperates with key side wall to locate the notch 31 position of engineering blade, and the number plate on the engineering blade 3a is in the gap of key tooth type all the time at this moment). After the starting key is inserted into the keyhole, when the small hole on the starting key passes through the protrusion 34 of the engineering blade 3a, the protrusion 34 will be inserted into the small hole of the starting key under the effect of the spring restoring force, and then the protrusion can be pushed and pulled firmly. From the channel 32 inner wall torn off, now the protrusion no longer plays a positioning role, when the engineering key was inserted into the engineering lock of the engineering blade 3a that was destroyed, the number piece on the engineering blade 3a would match the tooth profile on the engineering locking Cooperate to locate, and the tooth profile matched with the number plate 33 on the engineering blade 3a on the engineering key is just different from the tooth profile of the user's key, so that the engineering key is inserted into the damaged convex engineering blade 3a and cannot make the groove 11 Move to the unlocked position (ie side pin 5 can not fall in the groove 11), so just can realize the effect of engineering lock. the

Claims (8)

1. engineering loch head, include lock housing (1), in described lock housing (1), be provided with rotating lock gall (2), in described lock gall (2), be provided with keyhole (21) and blade groove (22), in described blade groove (22), be placed with vane group (3), it is characterized in that: in described vane group (3), include engineering blade (3a), be provided with destruction structure (34) at described engineering blade (3a), described destruction structure (34) be destroyed before, engineering spoon and user's spoon all can be untied vane group (3), and only can untie the destruction structure (34) that vane group (3) is rotated lock gall (2) with user's spoon after destroying, in described lock gall (2), also be provided with and to promote the resilient mounting (4) that vane group (3) resets.

2. engineering loch head according to claim 1, it is characterized in that: be provided with the passage (32) that inserts for key in described vane group (3), be provided with breach (31) in described vane group (3) bottom, be provided with on the key tooth form at described passage (32) inwall and cooperate the number sheet (33) of unblanking, be provided with flange on described vane group (3) top.

3. engineering loch head according to claim 2 is characterized in that: the passage (32) that described destruction structure (34) is located at engineering blade (3a) go up and the inwall of key contacts side surfaces on.

4. engineering loch head according to claim 3 is characterized in that: described destruction structure (34) is bulge-structure.

5. engineering loch head according to claim 4, its structure is: described bulge-structure and passage (32) inwall junction is provided with the gap that bulge-structure is destroyed.

6. engineering loch head according to claim 1, it is characterized in that: in described lock housing (1), be provided with groove (11), in described groove (11), be provided with the limit pin (5) that blocks vane group (3) and cooperate with breach (31) and the limit can be sold (5) jack-up and make it enter lock gall (2) fully thereby the elastic component (6) that realization is unblanked.

7. engineering loch head according to claim 1, it is characterized in that: described resilient mounting (4) is spring.

8. engineering loch head according to claim 7, it is characterized in that: described spring one end roof pressure is on the inwall of lock gall (2), and other end roof pressure is on the flange on vane group (3) top.

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