Lock core structure automatically locks upon damage

Abstract

A lock core structure includes a lock body with two lock cores 2, and a cam 3 is located between the lock cores. A driving block 4, having a limiting component 43, is located between the cam and each

Description

BACKGROUND OF THE INVENTION 1. Fields of the invention The present invention relates to a lock core structure that automatically locks upon damage, and more particularly, to a mechanism where, when one end of the lock core in the lock body is damaged, it causes the transmission device at the other end to lock and extends into the cam as soon as the damaged lock core is pulled out to effectively prevent the lock from being compromised due to component misalignment caused by striking. Meanwhile, the undamaged end of the lock core can still transmit motion to the cam via its transmission device, allowing it to unlock. 2. Descriptions of Related Art Commonly used locks typically achieve their locking and anti-theft effects through the upper and lower pins inside the lock core. Generally speaking, a common theft technique employed by burglars is to manipulate these upper and lower pins in the lock core, positioning them in the unlocking position, which allows the cam to be turned and the lock to be opened. However, if the lock housing and the arrangement of upper and lower pins in the lock core are too complex, making it difficult to manipulate the pins into the unlocking position, burglars can still directly damage the lock housing from the outside. This causes the connection between the lock housing and the lock core to break, allowing them to remove the lock core and directly turn the cam to unlock it. This method can still open the lock within a few minutes. Therefore, regardless of how complex the lock core is, if the force applied by the burglar to damage the lock is greater than the rigidity of the lock housing, they can break the housing and remove the core. As a result, there are still concerns about insufficient anti-theft protection. Some existing high-security locks have further incorporated a mechanism that automatically locks when the lock core is damaged. This is primarily achieved by installing radial limiting components in parts of the lock body or cam. These components are internally fitted with springs. Correspondingly, internal elements such as the cam or rotating wheel are equipped with assembly holes that align with these limiting components. As a result, when one end of the lock core is damaged and removed, the assembly hole at the damaged end can align with the limiting component. This causes the lock to automatically engage, preventing it from being unlocked. Furthermore, some advanced designs incorporate transmission components inside the cam or rotating wheel. The cam or rotating wheel can be configured with the aforementioned limiting components, while the transmission components are equipped with corresponding assembly holes. These transmission components are pressed against each other by elastic elements. As a result, when one end of the lock core is damaged, the lock core can no longer push against the transmission components. This causes the elastic elements to push the transmission components axially, allowing the assembly holes to align with the limiting components. This locks the transmission components, achieving anti-theft protection by preventing the lock from being opened. However, some of these automatic locking mechanisms can still be defeated by striking the lock core. This temporarily misaligns the springs or elastic elements, rendering them ineffective. As a result, the automatic locking mechanism fails, allowing the cam to be rotated and the lock to be opened. To comply with safety evacuation standards, the undamaged end of the lock core should still be able to unlock. Therefore, the automatic locking mechanism is usually placed on the same side as the damaged end. Moreover, the alignment and locking of the assembly holes and limiting components often rely on elastic elements for transmission. As a result, striking the lock can directly cause temporary misalignment of the elastic elements and springs, preventing them from effectively returning to their original positions. This renders die automatic locking mechanism ineffective. Consequently, conventional locks with automatic locking features still cannot ensure their effectiveness during operation. The present invention intends to provide a lock core structure that automatically locks upon damage, and the lock core is unlocked from the other end, so as to eliminate the shortcomings mentioned above. SUMMARY OF THE INVENTION The present invention relates to a lock core structure that automatically locks upon damage, and comprises a lock body having two lock cores, and a cam located between the lock cores in the lock body. Each of the lock cores has a driving block rotationally connected at an end corresponding to the cam. The driving block has a transmission slot defined axially therethrough. An assembly slot is defined radially through the driving block and communicates with the transmission slot. Each assembly slot has a limiting component located therein. Two transmission devices are respectively located within the transmission slots of the driving blocks, and the two transmission devices are interconnected axially. Each transmission device has a transmission block on an outer periphery thereof. The transmission block is located corresponding to and transmitting through the transmission slot. A recessed movement slot is defined axially in the outer periphery of the transmission device, and a limiting unit is defined radially in the outer periphery of the transmission device and located corresponding to the assembly slot. A distance between the assembly slots of different driving blocks is smaller than a distance between the limiting units of different transmission devices. The distance between the assembly slots is located within the distance between the limiting units. Each lock core has a transmission plate fixed at one end in an axial direction of the lock core. The transmission plate is correspondingly connected to the driving block for transmission. The transmission plate is connected to a transmission rod which has a transmission pin radially connected to the transmission rod. The transmission pin is correspondingly fitted to slide within the movement slot. The cam has a through slot located corresponding to the transmission device. The through slot has sliding grooves in a radial direction thereof, and the sliding grooves are located corresponding to the transmission blocks. The transmission blocks are axially movable in the sliding grooves, while the transmission blocks rotates the cam. When in a normal position, the different transmission devices directly or indirectly abut each other within the through slot, and the limiting units are not aligned with the limiting components. When in a damaged position, a first end of the lock body is damaged, and the lock core is pulled out, the transmission plate, the transmission rod and the transmission pin are simultaneously axially pulled out. The transmission pin correspondingly pulls the transmission device, which in turn pulls the transmission device at a second end of the lock body, so that the limiting unit of the transmission device of the second end of the lock body is aligned with the limiting component of the driving block corresponding thereto, causing the limiting unit of the transmission device of the second end of the lock body to engage with the limiting component of the driving block corresponding thereto, and to restrict an axial movement of transmission device of the second end of the lock body. At the same time, the transmission block of die second end of the lock body correspondingly extends into the sliding groove of the cam, while the transmission block at the first end of the lock body is pushed out from the sliding groove. Preferably, the driving block has an arc groove axially recessed and located corresponding to the transmission plate, and a connection slot located corresponding to the transmission rod. The arc groove, the connection slot, and the transmission slot are radially in communication with each other. Preferably, the transmission rod has a notch defined in an end where the transmission plate is connected. The transmission rod has a through-hole defined radially therethrough and located corresponding to the notch. The transmission plate is assembled into the notch, and the transmission plate has an assembly hole corresponding to the through-hole. An assembly pin extends through the assembly hole of the transmission plate and the through- hole of the notch to connect each other for mutual positioning and transmission. Preferably, each lock core has a transmission slot located corresponding to the transmission plate. The lock core has at least one fixing hole defined radially which communicates with the transmission slot. The transmission plate has positioning holes located corresponding to the fixing holes. A fixing pin extends through the positioning holes of the transmission plate and the at least one fixing holes of the lock core for mutual positioning and transmission. Preferably, a protruding connection part protrudes from two respective corresponding ends of the two transmission devices. The two respective protruding connection parts abut each other. Each protruding connection part has a recessed cutting slot defined in a periphery thereof. A coupling element has two ring parts which are respectively engaged with the cutting slots. Preferably, the limiting unit is a rectangular recess. The limiting component includes a stop block, a positioning block, and at least one elastic. The at least one elastic unit elastically abuts between the stop block and the positioning block. The stop block is shaped to correspond to the limiting unit. The positioning block abuts against an interior of the cam and elastically presses against the stop block corresponding thereof. The stop block elastically engages with the corresponding limiting unit when the stop block is aligned with the limiting unit. Preferably, the driving block has a radially recessed groove part defined in an outer periphery thereof. The cam has recessed fixing slots located corresponding to the groove part. Each fixing slot has a through-slot defined through an inner end thereof. Two limiting plates are respectively assembled in the through-slots and abut against the groove parts. Two positioning rings are respectively assembled in the fixing slots and press against the corresponding limiting plates. Preferably, the positioning rings each have a connecting part formed to an end corresponding to the lock body. The connecting parts are respectively assembled with a connecting piece. The lock body has two positioning slots which are respectively assembled with the connecting pieces. At least one hole slot is defined in the lock body and located corresponding to the lock core. The at least one hole slot is located corresponding to the positioning slot. Multiple pins are respectively assembled in the hole slots and the positioning slots, and correspondingly inserted into the connecting parts. Preferably, the transmission device has a recessed limiting slot. The driving block has a limiting hole located corresponding to the limiting slot. Each limiting hole is fitted with a stopping component, and the stopping component correspondingly extends into the limiting slot, thereby limiting an axial movement distance of the transmission device. Preferably, the lock core has a recessed axial hole located corresponding to the transmission device. An elastic element and a push pin are located in the axial hole. The elastic element elastically abuts against the push pin so that the push pin axially presses against the transmission device. The present invention utilizes the interconnected configuration between the transmission device, the transmission pin, the transmission rod, the transmission plate, and the lock core. The two transmission devices are also synchronously interconnected. In the normal position, the different transmission devices directly or indirectly abut each other within the through slot. When one transmission device enters the through slot of the cam, it can push the transmission device at the other end out of the through slot. When either end of the lock core is damaged, the present invention takes advantage of the mechanism that necessitates the removal of the lock core, when a burglar pulls the lock core, through the transmission plate, the transmission rod, and the transmission pin, the transmission device is pulled. Simultaneously, since the transmission devices are interconnected, the transmission device at the other end will also be pulled. This causes the limiting unit of the transmission device at the other end to align with the limiting component of its corresponding driving block, engaging with each other and restricting the axial movement of the transmission device, thus automatically locking it. At the same time, the transmission block at the other end extends into the sliding groove of the cam, while pushing the transmission block at the damaged end out of the sliding groove. This allows the transmission device and driving block at the damaged end to only rotate freely inside the cam, unable to rotate the cam and unlock it. Therefore, even if a burglar attempts to defeat the mechanism by striking, because the transmission device at the other end is far from the damaged end, and is separated by the cam, the driving block, the transmission device, and their internal profiles, the vibration from striking will be greatly dampened by these layers of components, making it extremely difficult to transmit to the transmission device at the other end and the limiting component. The axial movement of the transmission device is mainly driven by manual pulling, ensuring that it can accurately align and automatically lock when pulled. This achieves an excellent anti-theft effect. For the undamaged end, since the transmission block of the transmission device is located in the through slot of the cam, it can still be unlocked with the correct key, preventing the lock body from being deadlocked due to damage to one end of the lock core. Thus, the present invention enhances its applicability to various scenarios, improving its overall versatility. Even when one end of the lock core is damaged, its driving block and transmission device are still prevented from being removed from the cam due to the arrangement of the limiting plate and stopping component. They continue to rotate freely within the cam, thereby providing protection for the transmission device at the other end. This prevents the lock from being compromised by external striking forces. Through the installation of positioning rings, the present invention can accurately fix the position of the cam. This prevents the cam from being displaced due to impact forces when the lock core is subjected to external damaging forces. As a result, when one end of the lock core is damaged by external force and removed, it ensures that the transmission device at the other end can be smoothly pulled, allowing its limiting unit to be accurately positioned and engaged by die limiting component. This guarantees the effectiveness of the invention's automatic locking function. The different lock cores can be set up identically or differently. Similarly, the different components such as the transmission devices, the driving blocks, etc., can be set up identically or differently. When both sides have identical setups, it significantly reduces the number of different component configurations that need to be produced. This effectively saves on mold development costs. Additionally, during assembly, the symmetrical arrangement of identical structures reduces the difficulty of assembly and decreases assembly time, thereby improving die overall efficiency of manufacturing this invention. The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of the present invention; Figure 2 is an exploded view of the present invention; Figure 3 is an enlarged perspective view of tire cam, the driving block, and the transmission device of the present invention; Figure 4 is a cross-sectional view, taken along line A-A of Figure 1, showing the normal position of the present invention; Figure 5 is a cross-sectional view, taken along line B-B of Figure 1, showing the normal position of the present invention; Figure 6 is a cross-sectional view, taken along line A-A of Figure 1, showing die normal position with a key inserted of present invention; Figure 7 is a cross-sectional view, taken along line B-B of Figure 1, showing the normal position with a key inserted of the present invention; Figure 8 is a cross-sectional view, taken along line C-C of Figure 1, showing the normal position of the present invention; Figure 9 is a cross-sectional view, taken along line A-A of Figure 1, showing the damaged position of the present invention; Figure 10 is a cross-sectional view, taken along line B-B of Figure 1, showing the damaged position of tlie present invention, and Figure 11 is a cross-sectional view, taken along line C-C of Figure 1, showing the damaged position with a key inserted of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to Figures. 1 to 3, the lock core structure that automatically locks upon damage of the present invention comprises a lock body 1 having two lock cores 2, and a cam 3 located between the lock cores 2 in the lock body 1. The lock body 1 is be installed on a separating object (not shown in the figure), such as a door, and achieves the purpose of theft prevention for the separating object through the cam 3. In one embodiment, the lock core 2 can only be rotated with the correct key 8. The setup is well-known technology, so it will not be elaborated here. The form of the lock core 2 setup is only given as an example and is not intended to be limiting. Each of the lock cores 2 has a driving block 4 rotationally connected at one end corresponding to the cam 3. The driving block 4 has a transmission slot 41 defined axially therethrough. An assembly slot 42 is defined radially through the driving block 4 and communicates with the transmission slot 41. Each assembly slot 42 has a limiting component 43 located therein. Two transmission devices 5 are respectively located within the transmission slots 41 of the driving blocks 4, and the two transmission devices 5 are interconnected axially. In one embodiment, the transmission devices 5 can be directly assembled in the axial direction. To facilitate its connection and improve the reliability of axial transmission. Preferably, a protruding connection part 51 protrudes from two respective corresponding ends of the two transmission devices 5. The two respective protruding connection parts 51 abut each other. Each protruding connection part 51 has a recessed cutting slot 511 defined in a periphery thereof. A coupling element 52 has two ring parts 521 which are respectively engaged with the cutting slots 511. Accordingly, the two transmission devices 5 are axially movable at the same time. Each transmission device 5 has a transmission block 53 on an outer periphery thereof. The transmission block 53 is located corresponding to and transmitting through the transmission slot 41. A recessed movement slot 54 is defined axially in the outer periphery of the transmission device 5, and a limiting unit 55 is defined radially in the outer periphery of the transmission device 5 and located corresponding to the assembly slot 42. The cam 3 has a through slot 31 located corresponding to the transmission device 5. The through slot 31 has sliding grooves 311 in a radial direction thereof, and the sliding grooves 311 are located corresponding to the transmission blocks 53. The cam 3 has a recessed part 32 at both ends. The driving block 4 is placed inside the recessed part 32. The bottom wall surface of the recessed part 32 in the axial direction fonns a recessed interface 321. The through slot 31 and the sliding groove 311 are formed in the recessed interface 321. The transmission blocks 53 are axially movable in the sliding grooves 311, while the transmission blocks 53 rotates the cam 3. Therefore, when the lock core 2 is rotated by the correct key 8, it will directly transmit rotation to the driving block 4. This rotation is then transmitted th rough the transmission slot 41 to the transmission block 53 of the transmission device 5. When the transmission block 53 is positioned inside the sliding groove 311 of the cam 3, it transmits rotation to the cam 3 through the sliding groove 311, thus unlocking or locking the door. Each lock core 2 has a transmission plate 6 fixed at one end in an axial direction of the lock core 2. The transmission plate 6 is correspondingly connected to the driving block 4 for transmission. In one embodiment, the transmission plate 6 is designed as an arc-shaped plate. This design enhances the transmission torque from the lock core 2 to the driving block 4. This is particularly useful in cold weather conditions when indoor heating is typically used. If the door deforms due to temperature differences between the inside and outside causing thennal expansion and contraction, the arcshaped configuration of the transmission plate 6 makes it easier for users to rotate the lock core 2 and unlock the door. This improves the convenience and applicability of the invention during unlocking. However, this is only given as an example and is not intended to be limiting. The transmission plate 6 is connected to a transmission rod 7 which has a transmission pin 71 radially connected to the transmission rod 7. The transmission pin 71 is correspondingly fitted to slide within the movement slot 54. A distance between the assembly slots 42 of different driving blocks 4 is smaller than a distance between the limiting units 55 of different transmission devices 5. The distance between the assembly slots 42 is located within the distance between the limiting units 55. When in a normal position, as shown in Figures 4 and 5, the different transmission devices 5 directly or indirectly abut each other within the through slot 31, and the limiting units 55 are not aligned with the limiting components 43. In this situation, to maintain the position of the transmission device 5 and prevent any axial movement, a preferable arrangement, as shown in Figures 2 and 5, the lock core 2 has a recessed axial hole 21 located corresponding to the transmission device 5. An elastic element 211 and a push pin 212 are located in the axial hole 21. The elastic element 211 elastically abuts against the push pin 212 so that the push pin 212 axially presses against the transmission device 5 to position the transmission device 5. When the correct key 8 is inserted, as shown in Figures 6 and 7, the distal end of the key 8 will push the transmission device 5 axially. The range of this push is only enough to move the transmission block 53 into the sliding groove 311 of the cam 3. Therefore, when the key 8 rotates, it will simultaneously rotate the lock core 2. As mentioned earlier, the lock core 2 will transmit rotation to the driving block 4 through the transmission plate 6, and then through the transmission slot 41 to the transmission block 53 of the transmission device 5. Since the transmission block 53 is positioned inside the sliding groove 311 of the cam 3, it can transmit rotation to the cam 3 th rough the sliding groove 311, thus unlocking or locking the door. It is noted that when the lock core 2 is not damaged, for the transmission device 5 at the end where the key 8 is inserted, or the transmission device 5 at the other end, because the distance between the assembly slots 42 is smaller than the distance between the limiting units 55, the limiting units 55 of the transmission devices 5 at both ends cannot align with the assembly slots 42. Therefore, no locking occurs. Another purpose of the transmission pin 71 setup is that, in the nonnal position, because the lock core 2 has not been removed, the position of the transmission pin 71 is fixed which serves to limit the axial movement of the transmission device 5. Therefore, in the normal position, the distance between the transmission pins 71 is also smaller than the distance between the limiting units 55. This ensures that even if the transmission device 5 is pushed excessively, the movement slot 54 of the transmission device 5 at the other end will be limited by the transmission pin 71 at that end. As a result, the limiting unit 55 will not align with the assembly slot 42, preventing any locking from occurring. This ensures an effective protective safety measure for the normal operation of this invention. The driving block 4 has an arc groove 44 axially recessed and located corresponding to the transmission plate 6, and a connection slot 45 located corresponding to the transmission rod 7. The arc groove 44, the connection slot 45, and the transmission slot 41 are radially in communication with each other. In the normal state, the transmission rod 7 is located within the connection slot 45, and is axially positioned by tire transmission plate 6 being assembled in the arc groove 44. At the same time, this allows the transmission pin 71 to achieve the aforementioned axial limiting effect. As shown in Figures 2 and 4, the transmission rod 7 has a notch 72 defined in an end where the transmission plate 6 is connected. The transmission rod 7 has a through-hole 73 defined radially therethrough and located corresponding to the notch 72. The transmission plate 6 is assembled into the notch 72, and the transmission plate 6 has an assembly hole 61 corresponding to the through-hole 73. An assembly pin 62 extends through the assembly hole 61 of the transmission plate 6 and the through-hole 73 of the notch 72 to connect each other for mutual positioning and transmission. Since the transmission rod 7 is embedded within the connection slot 45, the assembly pin 62 will also be simultaneously positioned inside the driving block 4. This allows for effective and stable assembly and positioning between the transmission rod 7 and the transmission plate 6. As shown in Figure 2, each lock core 2 has a transmission slot 22 located corresponding to the transmission plate 6. The lock core 2 has at least one fixing hole 221 defined radially which communicates with the transmission slot 22. In this embodiment, the transmission plate 6 has two legs 63 which are located at one end of the lock core 2. The transmission plate 6 has positioning holes 631 located corresponding to the fixing holes 221. The positioning holes 631 are located at the legs 63. A fixing pin 64 extends through the positioning holes 631 of the transmission plate 6 and the at least one fixing holes 221 of the lock core 2 for mutual positioning and transmission. The lock body 1 accommodates lock pins through a bushing 11 configured at both ends of the lock body 1. The lock core 2 is correspondingly configured inside the bushing 11. The configuration relationship with the lock pins is known technology so the configuration structure will not be elaborated upon. Regarding the radial positioning of the fixing pin 64, it can be blocked by tlie inner wall of the bushing 11. This allows the lock core 2 to be correspondingly assembled with the transmission plate 6, enabling the transmission plate 6 to operate synchronously with the lock core 2. In the normal position, when the position of the limiting unit 55 is not aligned with tlie assembly slot 42 and the limiting component 43, it is not engaged in locking. In this embodiment, the limiting unit 55 is a rectangular recess. The limiting component 43 includes a stop block 431, a positioning block 432, and at least one elastic unit 433. The at least one elastic unit 433 elastically abuts between the stop block 431 and the positioning block 432. The stop block 431 is shaped to correspond to the limiting unit 55. The positioning block 432 abuts against an interior of the recessed part 32 of the cam 3 and elastically presses against the stop block 431 corresponding thereof. As shown in Figure 8, in die normal position, because the position of the limiting unit 55 is not aligned with the assembly slot 42 and the limiting component 43, so that the stop block 431 abuts one side of the transmission device 5, and is not a locked status. When in a damaged position, a first end of the lock body 1 is damaged, and the lock body 1, the bushing 11, or the lock core 2 may be damaged so that the lock core 2 can be pulled out. As shown in Figures 9 and 10, along with the lock core 2 being pulled out, the transmission plate 6, the transmission rod 7 and the transmission pin 71 are simultaneously and axially pulled out. The transmission pin 71 correspondingly pulls the transmission device 5 via the movement slot 54, and the transmission device 5 at a second end of the lock body 1 will be pulled. The axial movement of the transmission device 5 of the second end of the lock body 1 is restricted and is automatically locked. The stop block 431, as shown in Figures 9 and 11, is biased by tire elastic unit 433 and engaged with the limiting unit 55. At the same time, as shown in Figure 10, tire transmission block 53 of the second end of the lock body 1 correspondingly extends into the sliding groove 311 of the cam 3, while the transmission block 53 at the first end of tire lock body 1 is pushed out from the sliding groove 311. Therefore, the lock core 2 and the transmission device 5 at the first end of the lock body 1 can only rotate freely and cannot rotate the cam 3. Accordingly, the second end of the lock body 1 1 is automatically locked, and the lock body 1 cannot be unlocked from the first end. Preferably, the positions of the transmission pin 71 and the movement slot 54 can be configured so that when the movement slot 54 contacts the transmission pin 71 at the end of the other transmission device 5, the limiting unit 55 precisely corresponds to the position of the limiting component 43. This ensures that after the lock core 2 is pulled from the damaged end, the automatic locking can occur as previously described. The driving block 4 has a radially recessed groove part 46 defined in an outer periphery thereof. The cam 3 has recessed fixing slots 33 located corresponding to the groove part 46. Each fixing slot 33 has a through-slot 34 defined through an inner end thereof. Two limiting plates 35 are respectively assembled in the through-slots 34 and abut against the groove parts 46. Two positioning rings 36 are respectively assembled in the fixing slots 33 and press against the corresponding limiting plates 35. This allows the driving block 4 to correspondingly rotate within the cam 3, and when the transmission block 53 of the transmission device 5 extends into the sliding groove 311, it can drive the cam 3. Conversely, it will rotate freely within the cam 3. This configuration will prevent the driving block 4 from being removed from the cam 3 in the damaged status. Additionally, since the lock body 1 is typically embedded within the door, the positioning ring 36 will be buried deep within the separating object and cannot be seen. Furthermore, the lock body 1 is usually configured with a connecting rod 12 on both sides to install the bushing 11, and these have a property of being easily broken. This allows the bushing 11 and lock core 2 to be easily removed when in the damaged status, achieving the aforementioned automatic locking effect. At this point, unless the entire door is destroyed, it is impossible to further remove the positioning ring 36. This means the limiting plate 35 will remain in the recessed ring part 46, allowing the driving block 4 to only rotate freely and be axially positioned within die cam 3, without being able to remove the driving block 4. This prevents the lock from being compromised by striking, greatly enhancing the anti-theft properties of dris invention. Regarding the positioning of the positioning ring 36, to enhance its stability during positioning and to accurately fix the position of the cam 3, ensuring that the automatic locking mechanism of the present invention can operate effectively, preferably, the positioning rings 36 each have a connecting part 361 formed to an end corresponding to the lock body 1. The connecting parts 361 are respectively assembled with a connecting piece 13. The lock body 1 has two positioning slots 14 which are respectively assembled with the connecting pieces 13. At least one hole slot 15 is defined in the lock body 1 and located corresponding to the lock core 2. The at least one hole slot 15 is located corresponding to the positioning slot 14. Multiple pins 151 are respectively assembled in the hole slots 15 and the positioning slots 14, and correspondingly inserted into the connecting parts 361. This arrangement ensures the stability of the positioning ring 36. Regarding the positioning of the transmission device 5 in the driving block 4, the transmission device 5 has a recessed limiting slot 56. The driving block 4 has a limiting hole 47 located corresponding to the limiting slot 56. Each limiting hole 47 is fitted with a stopping component 471, and the stopping component 471 correspondingly extends into the limiting slot 56, thereby limiting an axial movement distance of the transmission device 5. It is understood that, as mentioned earlier, since the driving block 4 extends into and is set within the recessed part 32 of the cam 3, the radial direction of the stopping component 471 will be secured by the cam 3. As previously stated, because the driving block 4 cannot be removed from the cam 3, the installation of the stopping component 471 will also prevent the transmission device 5 from being removed from tire driving block 4 and the cam 3. Through this setup, the driving block 4, transmission device 5 at the damaged end, and the recessed interface 321 provide effective and complete shielding for the driving block 4 and transmission device 5 at the other end. This can effectively prevent the lock from being compromised by striking. With this setup, even if the current method of breaking the lock core 2 by striking is employed, as mentioned earlier, the locking mechanism of the present invention primarily relies on the lock core 2 being manually pulled out after it is been damaged, this action simultaneously pulls the transmission device 5 at the other end so as to activate the automatic locking mechanism. Since the force applied to manually pull out the lock core 2 is extremely strong, it won't be affected by misalignment, which could impact the operation of the transmission device 5. Therefore, it won't be susceptible to breaking through striking methods. Moreover, regarding the setup of the limiting component 43, although it still includes tire elastic unit 433, as mentioned earlier, the automatically locking end of the present invention is opposite to the damaged end. Furthermore, through the positioning setup of the aforementioned driving block 4, the transmission device 5, and the recessed interface 321 of the cam 3, the driving block 4 and transmission device 5 at the other end can be completely shielded. Therefore, even if tools or striking methods are used to damage one end, they will be blocked by the cam 3 and the driving blocks 4 and transmission devices 5 at both ends, making it impossible to reach the limiting component 43 at the other end. Consequently, breaking methods will not be effective against the limiting component 43. Thus, the present invention indeed possesses excellent antitheft effectiveness, preventing various breaking techniques while maintaining its automatic locking effect. As shown in Figure 9 and Figure 10, when the automatic locking mechanism is activated at tlie undamaged end due to damage at the aforementioned location, the transmission device 5 and cam 3 at the undamaged end are locked by the limiting unit 55 and the limiting component. Additionally, the transmission block 53 has already extended into the sliding groove 311 of the cam 3. Therefore, when the correct key 8 is inserted into the lock core 2 at the undamaged end and the lock core 2 is rotated, it can still transmit the motion to the cam 3 through the transmission plate 6, the driving block 4, and the transmission device 5 to unlock. This ensures that users at the undamaged end are not locked out due to damage at the other end, maintaining the ability to enter, exit, or escape safely from the undamaged side. The aforementioned lock cores 2 of the present invention can be set up identically or differently between them. Moreover, the components such as the transmission devices 5 and the driving blocks 4 located on both ends of the lock body 1 can all be set up identically or differently. When the transmission devices 5, the driving blocks 4, and other components on both ends are set up identically, it can significantly reduce the number of different component configurations that need to be produced. This can effectively save on mold development costs. Additionally, during assembly, due to the symmetrical setup of identical structures, it can reduce the difficulty of assembly and decrease assembly time, thereby improving the overall efficiency of manufacturing the present invention. The direction of the sliding groove 311 on the cam 3 can also be set up oppositely on each side to correspond with the different installation positions of the transmission blocks 53 of the transmission devices 5, even when they are identically configured. However, the through slot 31 still maintains a corresponding connected setup. Furthermore, regarding the configuration of the lock cores 2, they can have identical or different numbers of lock code combinations and external 5 configurations of transmission structures. They can also have identical external configurations of transmission structures but different numbers of lock code combinations. They can also have at least one difference in either the number of lock code combinations or the external configuration of the transmission structure, or be completely different. The only requirement is 10 that they achieve the aforementioned transmission and anti-theft effectiveness in their configuration. While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the 15 present invention.

Claims

1. A lock core structure that automatically locks upon damage, comprising:a lock body having two lock cores, and a cam located between the lock cores in the lock body;each of the lock cores having a driving block rotationally connected at an end corresponding to the cam, the driving block having a transmission slot defined axially therethrough, an assembly slot defined radially through the driving block and communicating with the transmission slot, each assembly slot having a limiting component located therein;two transmission devices respectively located within the transmission slots of the driving blocks, the two transmission devices interconnected axially, each transmission device having a transmission block on an outer periphery thereof, the transmission block located corresponding to and transmitting through the transmission slot, a recessed movement slot defined axially in the outer periphery of the transmission device, and a limiting unit defined radially in the outer peripheiy of the transmission device and located corresponding to the assembly slot;a distance between the assembly slots of different driving blocks being smaller than a distance between the limiting units of differenttransmission devices, the distance between the assembly slots being located within the distance between the limiting units;each lock core having a transmission plate fixed at one end in an axial direction of the lock core, the transmission plate being correspondingly connected to the driving block for transmission, the transmission plate connected to a transmission rod, the transmission rod having a transmission pin radially connected to the transmission rod, the transmission pin correspondingly fitted to slide within the movement slot; andthe cam having a through slot located corresponding to the transmission device, the through slot having sliding grooves in a radial direction thereof, and the sliding grooves located corresponding to the transmission blocks, the transmission blocks being axially movable in the sliding grooves, while the transmission blocks rotates the cam; andwherein the lock core structure is configured such that:when in a normal position, the different transmission devices are directly or indirectly interconnected with each other within the through slot, and the limiting units are not aligned with the limiting components; andwhen in a damaged position, when the lock core is pulled out from a damaged first end of the lock body, the transmission plate, the transmission rod and the transmission pin are simultaneously axially pulled out, the transmission pin correspondingly pulls the transmission device, which in turnpulls the transmission device at an undamaged second end of the lock body, so that the limiting unit of the transmission device of the second end of the lock body is aligned with the limiting component of the driving block corresponding thereto, causing the limiting unit of the transmission device of the second end of the lock body to engage with the limiting component of the driving block corresponding thereto, and to restrict an axial movement of transmission device of the second end of the lock body, at the same time, the transmission block of the second end of the lock body correspondingly extends into the sliding groove of the cam, while the transmission block at the first end of the lock body is pushed out from the sliding groove.

2. The lock core structure as claimed in claim 1, wherein the driving block has an arc groove axially recessed and located corresponding to the transmission plate, and a connection slot located corresponding to the transmission rod, the arc groove, the connection slot, and the transmission slot are radially in communication with each other.

3. The lock core structure as claimed in claim 1 or claim 2, wherein the transmission rod has a notch defined in an end where the transmission plate is connected, the transmission rod has a through-hole defined radially therethrough and located corresponding to the notch, the transmission plate is assembled into the notch, and the transmission plate has an assembly hole corresponding to the through-hole, an assembly pin extends through theassembly hole of the transmission plate and the through-hole of the notch so as to connect each other for mutual positioning and transmission.

4. The lock core structure as claimed in any preceding claim, wherein each lock core has a transmission slot located corresponding to the transmission plate, the lock core has at least one fixing hole defined radially which communicates with the transmission slot, the transmission plate has positioning holes located corresponding to the fixing holes, a fixing pin extends through the positioning holes of the transmission plate and the at least one fixing holes of the lock core for mutual positioning and transmission.

5. The lock core structure as claimed in any preceding claim, wherein a protruding connection part protrudes from two respective corresponding ends of the two transmission devices, the two respective protruding connection parts abut each other, each protruding connection part has a recessed cutting slot defined in a periphery thereof, a coupling element has two ring parts which are respectively engaged with the cutting slots.

6. The lock core structure as claimed in any preceding claim, wherein the limiting unit is a rectangular recess, the limiting component includes a stop block, a positioning block, and at least one elastic unit, the at least one elastic unit elastically abuts between the stop block and the positioning block, the stop block is shaped to correspond to the limiting unit, the positioning block abuts against an interior of the cam and elasticallypresses against the stop block corresponding thereof, the stop block elastically engages with the corresponding limiting unit when the stop block is aligned with the limiting unit.

7. The lock core structure as claimed in any preceding claim, wherein the driving block has a radially recessed groove part defined in an outer periphery thereof, the cam has recessed fixing slots located corresponding to the groove part, each fixing slot has a through-slot defined through an inner end thereof, two limiting plates are respectively assembled in the through-slots and abut against the groove parts, two positioning rings are respectively assembled in the fixing slots and press against the corresponding limiting plates.

8. The lock core structure as claimed in claim 7, wherein the positioning rings each have a connecting part formed to an end corresponding to the lock body, the connecting parts are respectively assembled with a connecting piece, the lock body has two positioning slots which are respectively assembled with the connecting pieces, at least one hole slot is defined in the lock body and located corresponding to the lock core, the at least one hole slot is located corresponding to the positioning slot, multiple pins are respectively assembled in the hole slots and the positioning slots, and correspondingly inserted into the connecting parts.

9. The lock core structure as claimed in claim 7 or claim 8, wherein the transmission device has a recessed limiting slot, the driving block has a limiting hole located corresponding to the limiting slot, each limiting hole is fitted with a stopping component, the stopping component correspondingly 5 extends into the limiting slot, thereby limiting an axial movement distance of the transmission device.

10. The lock core structure as claimed in any preceding claim, wherein the lock core has a recessed axial hole located corresponding to the transmission device, an elastic element and a push pin are located in the axial 10 hole, the elastic element elastically abuts against the push pin so that the push pin axially presses against the transmission device.

Images