GB2608879A

GB2608879A - Anti-forced entry mechanism for electro-mechanical lock core

Info

Publication number: GB2608879A
Application number: GB2203390.6A
Authority: GB
Inventors: Xu Juxiang
Original assignee: WENZHOU JINFU LOCKS CO Ltd
Current assignee: WENZHOU JINFU LOCKS CO Ltd
Priority date: 2021-07-13
Filing date: 2022-03-11
Publication date: 2023-01-18
Also published as: CN215565081U; GB202203390D0

Abstract

An anti-forced entry mechanism for an electro-mechanical lock core. A key operated outer cylinder and a handle operated inner cylinder between which is a cam. An inner lock core with a plurality of holes 210 arranged circumferentially is mounted within a inner lock shell 20; the inner lock shell has a slot in which is located a sliding retractable limit piece 6 which is normally misaligned/axially offset from holes 210. The inner lock core is biased toward to the outer lock body such that upon breaking/removal of the outer cylinder body the inner lock core axially moves such that limit piece such as spring biased radial pin 62 enters a hole 210 and prevents rotation of the inner lock core. The inner lock core includes a shoulder against which elastic piece such as spring 5 is located. The inner cylinder includes an electro-mechanical linkage part 41. The cam may include a spring biased radial pin engaging a groove in the inner lock core 6.

Description

Anti-forced entry Mechanism for Electro-mechanical Lock Core

Technical field

The invention is related to the technical field of locks. More specifically, it is related to an anti-forced entry mechanism for electro-mechanical lock core.

Background technology

Electro-mechanical locks are a very common lock in our daily life. The lock includes an outer lock body and an inner lock body. The outer lock body is provided with a key insertion end, and the inner lock body is provided with a handle end. A lock core cylinder cam is arranged between the outer lock body and the inner lock body. For known electro-mechanical locks, when the outer lock body breaks due to the application of force, an intruder only needs to find a suitable unlocking tool to drive the inner lock body to rotate it to realize the opening of the door. As a result, the anti-tamper performance of the lock is poor, and the security performance is greatly reduced.

Summary of Present Invention

With regards to the deficiencies in the prior art, the invention aims to provide an anti-forced entry mechanism for an electro-mechanical lock core with high security performance.

In order to achieve the above purpose, the present invention provides the following technical solutions: It is an anti-forced entry mechanism for an electro-mechanical lock core. The mechanism includes an outer lock body and an inner lock body. A cylinder cam is arranged between the outer lock body and the inner lock body, and the outer lock body is provided with a key insertion end. The inner lock body is provided with a handle part, which is characterized by: the inner lock body includes an inner lock shell, and an inner lock core extends through the inner lock shell.

One end of the inner lock core extends into the cylinder cam. An extension core is provided on the other end of the inner lock core. The cross section of the extension core is smaller than the cross section of the inner lock core, and the handle part includes a rotating handle and a linkage part. A stopper is provided on the linkage part, a through hole is provided on the stopper, and an elastic element is sleeved on the extension core. One end of the elastic piece engages with the stopper, and the other end engages with the inner lock core. A plurality of limiting holes are arranged on one end of the inner lock core close to the extension core. The limiting holes are circumferentially distributed along the outer surface of the inner lock core. A sliding groove is arranged on the inner wall of the inner lock shell, and a retractable limit piece is arranged in the sliding groove.

The invention is further provided as: The limit piece includes a base, a first spring and a retracting block. One end of the first spring is fixed on the base, and the other end of the spring is fixed on the retracting block. The end of the retracting block is configured in the shape of a circular truncated cone.

The invention is further provided as: A locking slot is provided in the cylinder cam, and a retractable locking piece is provided in the locking slot, the inner lock core is provided with a stroke groove for clamping the locking piece, and the stroke groove is arranged in a long strip shape.

The invention is further provided as: The locking piece includes a locking block and a second spring; the second spring being located between the locking block and the bottom wall of the clamping groove.

By adopting the above technical solution, when the outer lock body is forcibly damaged and broken due to the application of force, the elastic piece will push the inner lock core to move toward the outer lock body. During the movement of the inner lock core, the position of the limit hole will move to the limit piece. The limit piece cooperates with the limit hole to lock the position of the inner lock core, so that the part of the inner lock body cannot be opened even with the help of an unlocking tool. In this way, the anti-tamper performance is improved, and the security performance of the lock is greatly improved.

Brief Description of drawings

Figure 1 is a schematic diagram of the structure of the utility model; Figure 2 is a sectional view of the utility model; Figure 3 is an enlarged view at a in Figure 2; Figure 4 is an enlarged view at b in Figure 2; Figure 5 is an exploded view of the partial structure of the utility model; Figure 6 is a schematic diagram of the structure of the cylinder cam; and Figure 7 is a schematic diagram of the internal lock structure.

List of parts: 1. outer lock body; 2. inner lock body; 20. inner lock shell; 200. slide groove; 21.

inner lock core; 210. limiting hole; 211. stroke groove; 22. extension core; 3. cylinder cam; 30.

card slot; 4. handle part; 40. rotary handle; 41. interlock part; 42. stopper; 5. elastic part; 6. limit piece; 60. base; 61. first spring; 62. retracting block; 7, locking piece; 70, locking block; 71, second spring.

Detailed Description of Preferred Embodiment

The below part further illustrates the invention by referring to figure 1 to figure 7.

Figures 1 to 7 illustrate the anti-forced entry mechanism for an electro-mechanical lock core.

Referring to figure 1, the mechanism includes an outer lock body 1 and an inner lock body 2. A cylinder cam 3 is arranged between the outer lock body 1 and the inner lock body 2, and the outer lock body 1 is provided with a key insertion end.

The inner lock body 2 is provided with a handle part 4, and referring to figure 5, the inner lock body 2 includes an inner lock shell 20, and an inner lock core 21 extends through the inner lock shell 20.

Referring also to figures 3 and 4, one end of the inner lock core 21 extends into the cylinder cam 3. An extension core 22 is provided on the other end of the inner lock core 21.

The cross section of the extension core 22 is smaller than the cross section of the inner lock core 21, and referring to figure 4, the handle part 4 includes a rotating handle 40 and an electro-mechanical linkage part 41.

A stopper 42 is provided on the linkage part 41, and a through hole is provided on the stopper 42, and an elastic element 5 is sleeved on the extension core 22. One end of the elastic piece 5 engages with the stopper 42, and the other end engages with the inner lock core 21, so that rotation of the rotating handle 40 or the linkage part 41 rotates the inner lock core 21.

Referring to figure 5, a plurality of limiting holes 210 are arranged on one end of the inner lock core 21 close to the extension core 22. The limiting holes 210 are circumferentially distributed along the outer surface of the inner lock core 21.

Referring also to figure 7, a sliding groove 200 is arranged on the inner wall of the inner lock shell 20, and a retractable limit piece 6 is arranged in the sliding groove 200. The limit piece 6 is insertable in the limiting hole 210 of the inner lock shell 21.

The limit piece 6 includes a base 60, a first spring 61 and a retracting block 62. One end of the first spring 61 is fixed on the base 60, and the other end is fixed on the retracting block 62. The end of the retracting block 62 is arranged in the shape of a circular truncated cone.

A locking slot 30 is provided in the cylinder cam 3, and a retractable locking piece 7 is provided in the locking slot 30, the inner lock core 21 is provided with a stroke groove 211 for clamping the locking piece 7, and the stroke groove 211 is arranged in a long strip shape.

The locking piece 7 includes a locking block 70 and a second spring 71, the second spring 71 being located between the locking block 79 and the bottom wall of the clamping groove 30.

The locking piece 7 in the cylinder cam 3 is driven by the second spring 71. The locking block 70 is located in the locking groove 30 of the inner lock core 21 to cooperate, so that the part of the cylinder cam 3 and the inner lock body 2 are always in a matched state.

When the lock is forced open violently, the joint between the cylinder cam 3 and the outer lock body 1 typically breaks, causing the outer lock body 1 to break away from the entire lock.

Simultaneously, the inner lock core 21 on the inner lock body 2 no longer experiences the pressing force of the outer lock body 1, and the inner lock core 21 is urged by the elastic piece 5 to move toward the outer lock body 1.

When the inner locking sleeve 21 moves, the position of the limiting hole 210 will move to alignment with the limit piece 6. The retracting block 62 on the limit piece 6 is urged by the spring 61 to be clamped in the limiting hole 210.

When this occurs, the inner lock core 21 is in a locked state and cannot be rotated; even using an external unlocking tool, the inner lock core 21 cannot be unlocked. This improves the anti-tamper performance of the lock, and at the same time greatly improves the security performance of the overall lock.

The above-mentioned content is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above-mentioned embodiments.

All technical solutions under the idea of the invention belong to the protection scope of the patent. It should be noted that for those of ordinary skill in the technical field, several improvements and modifications under the premise of not departing from the principles of the invention should also be regarded as the scope of protection of the patent.

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Claims

Claims: 1. An anti-forced entry mechanism for an electro-mechanical lock core, the mechanism comprising: an outer lock body and an inner lock body; a cylinder cam is arranged between the outer lock body and the inner lock body, the outer lock body being provided with a key insertion end; the inner lock body is provided with a handle part, which is characterized by: the inner lock body including an inner lock shell, and an inner lock core which extends in the inner lock shell; one end of the inner lock core extends into the cylinder cam; an extension core is provided on the other end of the inner lock core; the cross section of the extension core is smaller than the cross section of the inner lock core, and the handle part includes a rotating handle and a linkage part; a stopper is provided on the linkage part, a through hole is provided on the stopper, and an elastic element is sleeved on the extension core; one end of the elastic piece engages with the stopper, and the other end engages with the inner lock core; a plurality of limiting holes arranged on one end of the inner lock core close to the extension core; the limiting holes are circumferentially distributed along the outer surface of the inner lock core; a sliding groove is arranged on the inner wall of the inner lock shell, and a retractable limit piece is arranged in the sliding groove, such that when joint between the cylinder cam and the outer lock body breaks and the outer lock body break away from the remainder of lock, the inner lock core on the inner lock body no longer experiences the pressing force of the outer lock body, and the inner lock core is urged by the elastic piece to move toward the outer lock body and the inner locking sleeve move to align a limiting hole with the limit piece, the retracting block on the limit piece being urged by a spring to be clamped in the limiting hole, causing the inner lock core to be in a locked state which cannot be rotated, locking the inner lock core and the lock.
2. An anti-forced entry mechanism according to claim 1, further characterized in that the limit piece includes a base, a first spring and a retracting block, one end of the first spring is fixed on the base, and the other end is fixed on the retracting block, the end of the retracting block being arranged in the shape of a circular truncated cone.
3. An anti-forced entry mechanism according to either previous claim, further characterized in that: A locking slot is provided in the cylinder cam, and a retractable locking piece is provided in the locking slot, the inner lock core is provided with a stroke groove for clamping the locking piece, and the stroke groove is arranged in a long strip shape.
4. An anti-forced entry mechanism according to claim 3, further characterized in that the locking piece includes a locking block and a second spring, and the second spring being located between the locking block and the bottom wall of the clamping groove.20 25 30 35