CN203978008U - an anti-theft lock - Google Patents

Abstract

The utility model relates to the technical field of lock anti-theft, and in particular to an anti-theft lock, which includes a lock body, a lock core, and a key. The lock body is provided with a column lock tongue and a bullet oblique tongue for locking a door. Among them, the utility model is to provide an internal gear and a polygonal hole in a cylindrical key, so that the structure of the key is relatively complex, thereby increasing the difficulty of key preparation; at the same time, the utility model adopts a secondary unlocking structure, which requires the first successful opening of the column lock tongue before the second opening of the bullet oblique tongue can be performed, so that the security of the anti-theft lock is higher.

Description

an anti-theft lock

technical field

The utility model relates to the technical field of anti-theft locks, in particular to an anti-theft lock.

Background technique

At present, anti-theft locks on the market are mainly composed of a lock body, a lock cylinder, and a key. The lock body is provided with a deadbolt for locking the door. Only when the keyhole of the lock core can be twisted can the dead bolt be opened. However, the keys of the anti-theft locks in the prior art are generally flat, curved, cross-shaped grooves and teeth, etc., which are more common in life and are easily prepared and imitated by lawless elements to unlock and steal; and they are usually disposable Unlocking, illegal unlocking is less difficult.

Utility model content

The purpose of the utility model is to provide an anti-theft lock which is difficult to prepare a key and adopts a secondary unlocking structure in view of the deficiencies of the prior art.

In order to achieve the above object, the utility model adopts the following technical solutions:

An anti-theft lock, comprising a lock body, a lock cylinder, and a key. The lock body is provided with a cylinder deadbolt and a bullet bolt for locking the door; the key is in the shape of a cylinder, and the inside of the cylinder-shaped key is An internal gear, a polygonal hole, and an accommodating hole are arranged in sequence from front to back, the apertures of the internal gear and the accommodating hole are larger than the aperture of the polygonal hole, and a spring and a piston block are arranged in the accommodating hole. One end of the spring is against the rear end of the accommodating hole, and the other end of the spring is against the piston block, so that the piston block can move forward and backward along the accommodating hole; the lock core includes a main shaft, a transmission Shaft, main shaft gear, transmission shaft gear, the front part of the lock core is provided with a key hole matching the key, the main shaft gear is rotatably installed on the rear part of the lock core near the upper side, and the main shaft The front end of the gear is provided with an external gear matching the internal gear, and the external gear extends into the rear end of the keyhole; the main shaft passes through the main shaft gear so that the front end of the main shaft extends into the In the front end of the keyhole, and the front end of the main shaft is provided with a polygonal cylinder matching the polygonal hole, the rear end of the main shaft is inserted into the lock body, and the rear end of the main shaft is locked with the cylinder Tongue transmission connection; the transmission shaft gear is rotatably mounted on the lower side of the rear part of the lock cylinder, and the transmission shaft gear is meshed with the main shaft gear, and the front end of the transmission shaft is connected to the transmission shaft gear Fixedly connected, the rear end of the transmission shaft is inserted into the lock body, and the rear end of the transmission shaft is in transmission connection with the bullet bolt.

Wherein, the inner side of the lock body is provided with an indoor key hole, and an indoor and outdoor gear matched with the internal gear of the key is arranged in the indoor key hole, and the indoor and outdoor gear is connected with the bullet bolt in transmission.

Wherein, the lock body is provided with a knob for locking the bullet bolt.

Wherein, the lock body is provided with a button for locking the cylinder lock tongue.

The beneficial effect of the utility model is that: the utility model is provided with an internal gear and a polygonal hole in the cylindrical key, which makes the structure of the key more complicated, thereby increasing the difficulty of key preparation; at the same time, the utility model adopts a secondary unlocking structure , It is necessary to successfully open the cylinder deadbolt for the first time before opening the oblique tongue of the bullet for the second time, thereby increasing the difficulty of illegal unlocking and making the anti-theft lock more secure.

Description of drawings

Fig. 1 is the structural representation of the utility model when unlocking by a key from the outside.

Fig. 2 is a schematic structural view of the utility model when the key is unlocked indoors.

Fig. 3 is a schematic cross-sectional view of the key of the present invention.

Fig. 4 is the front view of the key of the present utility model.

Fig. 5 is a side view of the lock cylinder of the present invention.

Fig. 6 is a front view of the lock cylinder of the present invention.

Fig. 7 is a schematic cross-sectional view of the lock cylinder of the present invention.

Fig. 8 is a side view of the main shaft gear of the present invention.

Fig. 9 is a front view of the main shaft gear of the present invention.

Fig. 10 is a front view of the transmission shaft gear of the present utility model.

In Figures 1 to 10 include:

1—lock body, 11—cylindrical deadbolt, 12—bullet bolt, 13—indoor keyhole, 14—indoor and outdoor gear, 15—knob, 16—button, 2—lock cylinder , 21 - main shaft, 211 - polygonal cylinder, 22 - transmission shaft, 23 - main shaft gear, 231 - external gear, 24 - transmission shaft gear, 25 - key hole, 3 - key, 31 —Internal gear, 32—polygonal hole, 33—accommodating hole, 34—spring, 35—piston block.

Detailed ways

In order to describe the technical solution of the utility model in detail, the technical solution of the utility model embodiment will be clearly and completely described below in conjunction with the accompanying drawings of the utility model embodiment. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Please refer to FIGS. 1-10 , the anti-theft lock of the present invention includes a lock body 1 , a lock cylinder 2 and a key 3 . The lock body 1 is provided with a cylindrical deadbolt 11 and a bullet bolt 12 for locking the door.

As shown in FIGS. 1-4 , the key 3 is in the shape of a cylinder, and an internal gear 31 , a polygonal hole 32 , and an accommodating hole 33 are sequentially arranged in the cylindrical key 3 from front to back. The internal gear 31 is fixed in the key 3, and the aperture of the internal gear 31 is larger than the aperture of the polygonal hole 32, so that the polygonal cylinder 211 at the front end of the main shaft 21 can pass through the internal gear 31 and be placed in the polygonal hole 32. At this time, the key 3 The main shaft 21 can be screwed. The accommodation hole 33 is provided with a spring 34 and a piston block 35. One end of the spring 34 is against the rear end of the accommodation hole 33, and the other end of the spring 34 is against the piston block 35, so that the piston block 35 can stretch back and forth along the accommodation hole 33. move. The diameter of the receiving hole 33 is larger than that of the polygonal hole 32, so that the polygonal hole 32 can restrict the piston block 35, and the piston block 35 cannot be disengaged forward. Certainly, the above-mentioned polygonal hole 32 can be a polygonal nut and be fixed in the key 3 , for example: in this embodiment, the polygonal hole 32 is formed by a hexagonal nut.

As shown in FIGS. 5-10 , the lock cylinder 2 includes a main shaft 21 , a transmission shaft 22 , a main shaft gear 23 and a transmission shaft gear 24 . The front portion of the lock cylinder 2 is provided with a keyhole 25 matching the key 3, so that the key 3 can be inserted into the keyhole 25. The main shaft gear 23 is rotatably mounted on the rear portion of the lock cylinder 2 near the upper side, and the front end of the main shaft gear 23 is provided with an external gear 231 matched with the internal gear 31, and the external gear 231 stretches into the rear end of the keyhole 25, so that the key 3. When inserted into the keyhole 25 to the rearmost end, the internal gear 31 of the key 3 just meshes with the external gear 231. At this moment, the key 3 can turn the main shaft gear 23 to rotate. The main shaft 21 passes through the main shaft gear 23. Specifically, the main shaft gear 23 is sheathed in the middle of the main shaft 21, but the main shaft gear 23 and the main shaft 21 are not fixedly connected, that is, the rotation of the main shaft gear 23 will not drive the main shaft 21. Similarly, The twisting of the main shaft 21 will not drive the main shaft gear 23 either. The front end of main shaft 21 stretches in the front end of keyhole 25, and the front end of main shaft 21 is provided with the polygonal cylinder 211 that matches with polygonal hole 32, the rear end of main shaft 21 inserts lock body 1, and the rear end of main shaft 21 and cylinder The dead bolt 11 is connected in transmission, so that the main shaft 21 can be twisted to open the cylinder dead bolt 11 . The transmission shaft gear 24 is rotatably mounted on the lower side of the rear portion of the lock cylinder 2, and the transmission shaft gear 24 meshes with the main shaft gear 23, so that the rotation of the main shaft gear 23 can drive the transmission shaft gear 24 to rotate. The front end of transmission shaft 22 is fixedly connected with transmission shaft gear 24, and the rear end of transmission shaft 22 is inserted into lock body 1, and the rear end of transmission shaft 22 is connected with bullet bolt 12 transmission, makes the rotation of transmission shaft gear 24 can drive transmission shaft 22, drive bullet latch 12 to open by power transmission shaft 22 again.

Preferably, the inside of the lock body 1 is provided with an indoor keyhole 13, and the indoor keyhole 13 is provided with an indoor and outdoor gear 14 matched with the internal gear 31 of the key 3, and the indoor and outdoor gear 14 is in transmission connection with the bullet bolt 12, so that The key 3 can be inserted into the indoor keyhole 13 and turn the indoor and outdoor gear 14, thereby opening the bullet latch 12, that is, in the room, the key 3 must be provided to open the bullet latch 12, to increase the security of the anti-theft lock.

Preferably, the lock body 1 is provided with a knob 15 for locking the bullet bolt 12 ; the lock body 1 is also provided with a button 16 for locking the cylinder lock tongue 11 . When allowing the user to be indoors, the bullet bolt 12 or the cylinder dead bolt 11 can be locked as required, even if the user can not open it with the key 3 outdoors, the security of the anti-theft lock is further increased.

Specifically, the anti-theft lock of the present utility model has its working principle as follows: as shown in Figure 1, when the user unlocks the lock through the key 3 from the outside, the key 3 is inserted into the keyhole 25 of the lock cylinder 2, and the front end of the main shaft 21 is first The polygonal cylinder 211 of the key 3 will be inserted into the polygonal hole 32 of the key 3. At this time, as long as the key 3 is turned, the main shaft 21 can be turned, and then the cylinder lock tongue 11 can be opened to realize unlocking for the first time; then, the user needs to Continue to insert the key 3 until the rear end of the keyhole 25, then the internal gear 31 of the key 3 just meshes with the external gear 231 of the lock core 2, at this moment, as long as the key 3 is turned, the main shaft gear 23 can be turned to rotate, and The main shaft gear 23 can drive the transmission shaft 22 through the transmission shaft gear 24, thereby opening the bullet bolt 12, realizing unlocking for the second time, and the door can be opened.

Wherein, after the door lock is opened, after the key 3 is dialed out, the cylinder dead bolt 11 does not move, and the bullet bolt 12 resets. If the door is closed, the bullet bolt 12 can lock the door, and because the main shaft 21 does not twist, the cylinder dead bolt 11 does not move. Now, if you want to open the door and go out, you must insert the indoor keyhole 13 with the key 3 and turn the indoor and outdoor gear 14, as shown in Figure 2, open the bullet bolt 12 again.

Therefore, this anti-theft lock is the same as other anti-theft locks, and it comprises lock body, lock core, key and forms. There are also two kinds of lock tongues. In order to further improve the anti-theft function and ability, the internal structure of the lock body, lock cylinder and key has been comprehensively improved. The two lock tongues of the lock body operate independently, and the lock cylinder is changed to Gears combined with polygonal shafts. The teeth and the polygon of the key and the lock cylinder cooperate to operate the two dead bolts in the lock body respectively. And the operation is simple and easy to understand. Not only increased the difficulty of illegally preparing or imitating keys, but also greatly improved the anti-theft capability of the lockset.

Moreover, the anti-theft lock adopts a unique secondary unlocking technology, and the engagement between the key and the lock cylinder requires relatively high precision, which increases the difficulty of illegal unlocking and effectively improves the anti-theft capability of the lockset.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art Personnel should understand that any modification or equivalent replacement of the technical solution of the utility model belongs to the protection scope of the utility model.

Claims (4)

1. a theftproof lock, comprises lock body, lock core, key, it is characterized in that: described lock body is provided with cylinder dead bolt, the bullet latch bolt for locking a door;

Described key is cylindrical shape, this is in the key of cylindrical shape and is disposed with from front to back internal gear, polygonal hole, containing hole, the aperture of described internal gear, the aperture of containing hole are all greater than the aperture of described polygonal hole, in described containing hole, be provided with spring, piston block, described spring one end props up the rear end of described containing hole, the described spring other end props up described piston block, makes the described piston block can be along the elastic movement of described containing hole;

Described lock core comprises main shaft, power transmission shaft, mainshaft gear, shaft gear, the front portion of described lock core offers the keyhole mating with described key, described mainshaft gear is rotatably installed on the top side in rear portion of described lock core, the front end of described mainshaft gear is provided with the external gear mating with described internal gear, and described external gear stretches in the rear end of described keyhole; Described main shaft is through described mainshaft gear, the front end of described main shaft is stretched in the front end of described keyhole, and the front end of described main shaft is provided with the polygon cylinder mating with described polygonal hole, described lock body is inserted in the rear end of described main shaft, and the rear end of described main shaft and described cylinder dead bolt are in transmission connection; The rear portion that described shaft gear is rotatably installed on described lock core is side on the lower, and described shaft gear and the engagement of described mainshaft gear, the front end of described power transmission shaft is fixedly connected with described shaft gear, described lock body is inserted in the rear end of described power transmission shaft, and the rear end of described power transmission shaft and described bullet latch bolt are in transmission connection.

2. theftproof lock according to claim 1, it is characterized in that: the inner side of described lock body offers indoor keyhole, in described indoor keyhole, be provided with the indoor and outdoor gear mating with the internal gear of described key, this indoor and outdoor gear and described bullet latch bolt are in transmission connection.

3. theftproof lock according to claim 1 and 2, is characterized in that: described lock body is provided with the knob for locked described bullet latch bolt.

4. theftproof lock according to claim 1, is characterized in that: described lock body is provided with the button for locked described cylinder dead bolt.