An anti-theft lock core

Abstract

The present invention discloses an anti-theft lock core, which includes a lock body, a dial foot body, a dial foot ring and a locking component. Inner and outer lock cylinders are respectively connected to two ends of the lock body, and clamping blocks are arranged at the ends of the inner lock cylinder and the outer lock cylinder. The dial foot body is rotatably arranged between the inner lock cylinder and the outer lock cylinder. The dial foot body has a hollow sleeve, and a chute is arranged on the inner wall of the hollow sleeve. The dial foot ring is sleeved in the hollow sleeve. The dial foot ring is provided with a clamping groove for cooperating with the clamping block, and the dial foot ring is provided with a receiving groove, and a connecting key for cooperating with the chute is received in the receiving groove. The locking component is arranged in the inner lock cylinder, and the locking component is used for locking the inner lock cylinder and the dial foot body. After the outside of the lock body of the anti-theft lock core of the present invention is damaged, the dial foot body is not easily rotated forcibly, and it has good anti-theft performance.

Description

Technical Field

[0001] The present invention relates to the technical field of locks, and in particular to an anti-theft lock core. Background Art

[0002] The anti-theft door protects the safety of the household entrance. The key to the anti-theft door is the anti-theft door lock, and the core component of the anti-theft door lock is the lock core. To improve the anti-theft performance of the anti-theft lock core, it mainly starts from two aspects: preventing technical unlocking and preventing forced unlocking. Among them, preventing forced unlocking is considered from improving the structure and increasing the material strength. Generally, the lock core is connected to the card slot inside the dial leg through the lock cylinder and drives the dial leg to rotate to unlock. The existing lock core has a simple structure. When the outer side of the lock core is forcibly broken by a clamp, the dial leg will be exposed. A clamp or other tool can be inserted into the card slot inside the dial leg. Even if the dial leg is locked with the lock cylinder, the dial leg can be forcibly rotated with the card slot as the force point, and the door lock will be opened. The existing lock core is difficult to cope with this kind of forced unlocking behavior, and the anti-theft performance is poor. Summary of the Invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art. For this reason, the present invention provides an anti-theft lock core. After the outer side of the lock body is damaged, the dial leg body is not easily forcibly rotated, and it has good anti-theft performance.

[0004] An anti-theft lock core according to an embodiment of the present invention includes: a lock body, with an inner lock cylinder and an outer lock cylinder respectively connected to both ends of the lock body, and a clamping block is provided at the end of the inner lock cylinder and the end of the outer lock cylinder; a dial leg body, rotatably arranged between the inner lock cylinder and the outer lock cylinder, the dial leg body has a hollow sleeve, and a chute is provided on the inner wall of the hollow sleeve; a dial leg ring, sleeved inside the hollow sleeve, the dial leg ring is provided with a card slot for cooperating with the clamping block, the dial leg ring is provided with a receiving groove, and a connection key for cooperating with the chute is received in the receiving groove; a locking assembly, arranged on the inner lock cylinder, and the locking assembly is used to lock the inner lock cylinder and the dial leg body.

[0005] The above technical solution has at least the following beneficial effects: When the outer side of the lock body is forcibly broken, the outer lock cylinder is separated from the lock body, and the locking assembly locks the inner lock cylinder and the dial leg body, making the inner lock cylinder and the dial leg body integrated. When the lock core is locked, the inner lock cylinder and the lock body are in a locked state, and the dial leg body is not easily rotated. Moreover, the end of the dial leg body is exposed outward. Under the vibration generated during the breaking process, the dial leg ring and the connection key are separated from the dial leg body, making it lack the force point to rotate the dial leg body. It is impossible to forcibly rotate the dial leg body by inserting a clamp or other tool into the card slot. At the same time, because the connection key is small, it is not easy to be found after separation. Even if the dial leg ring is reinstalled, the dial leg ring can only rotate idly inside the hollow sleeve and cannot drive the dial leg body to rotate. Therefore, even if the outer side of the lock body is forcibly broken, it is impossible to unlock, and it has good anti-theft performance.

[0006] According to some embodiments of the present invention, the connecting key is set as a steel ball, the steel ball is accommodated in the accommodating groove, and the steel ball cooperates with the sliding groove.

[0007] According to some embodiments of the present invention, the diameter of the steel ball is less than 5 mm.

[0008] According to some embodiments of the present invention, the connecting key is set as a bolt, the bolt is accommodated in the accommodating groove, and the bolt cooperates with the sliding groove.

[0009] According to some embodiments of the present invention, the sliding groove is arranged along the axial direction of the hollow sleeve, and the sliding groove extends to the end of the hollow sleeve.

[0010] According to some embodiments of the present invention, the sliding groove is arranged on the upper side of the hollow sleeve.

[0011] According to some embodiments of the present invention, a conical surface is arranged on the outer wall of the dialing foot ring, and the small end of the conical surface is located inside the hollow sleeve.

[0012] According to some embodiments of the present invention, a positioning ring is arranged inside the hollow sleeve, and the dialing foot ring and the connecting key abut against the positioning ring.

[0013] According to some embodiments of the present invention, the locking assembly includes a locking pin, a first elastic member and a second elastic member. A locking hole cooperating with the locking pin is arranged on the side wall of the hollow sleeve. A first accommodating cavity is radially arranged on the inner lock cylinder. The first elastic member and the locking pin are sequentially accommodated in the first accommodating cavity from the inside to the outside, and the second elastic member is arranged between the inner lock cylinder and the hollow sleeve.

[0014] According to some embodiments of the present invention, the locking pin is provided with a second accommodating cavity, and one end of the first elastic member is accommodated in the second accommodating cavity.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0017] Figure 1 is a schematic structural diagram of an anti-theft lock core in an embodiment of the present invention;

[0018] Figure 2 is a schematic structural diagram of the anti-theft lock core in the embodiment of the present invention after the outer side is broken;

[0019] Figure 3 This is a partial cross-sectional view of the front view of the anti-theft lock core in the embodiment of the present invention;

[0020] Figure 4 This is a right-side cross-sectional view of the anti-theft lock core in the embodiment of the present invention;

[0021] Figure 5 This is a schematic structural diagram of the dialing foot body in the embodiment of the present invention;

[0022] Figure 6 This is a schematic structural diagram of the dialing foot ring in the embodiment of the present invention.

[0023] Reference numerals:

[0024] Lock body 100, inner lock cylinder 110, latch 111, first accommodation cavity 112, first stepped portion 113, outer lock cylinder 120;

[0025] Dialing foot body 200, hollow sleeve 210, chute 211, positioning ring 212, lock hole 213, second stepped portion 214, tongue portion 220;

[0026] Dialing foot ring 300, card slot 310, accommodation groove 320, connecting key 330, conical surface 340;

[0027] Locking assembly 400, lock pin 410, second accommodation cavity 411, third stepped portion 412, first elastic member 420, second elastic member 430. Detailed implementation manners

[0028] This part will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0029] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceeding", etc. are understood not to include the present number, and "above", "below", "within", etc. are understood to include the present number. If "first" and "second" are described, they are only used for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. shall be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0032] Refer to Figure 1 and Figure 2 , in combination with Figure 5 and Figure 6, an embodiment of the present invention provides an anti-theft lock core, which includes a lock body 100. The middle part of the lock body 100 has a hollow part. Inner lock cylinders 110 and outer lock cylinders 120 for unlocking or locking from the inner and outer sides of the lock body 100 are respectively connected to both ends of the lock body 100. A dialing foot body 200 is rotatably arranged in the hollow part, that is, the dialing foot body 200 is arranged between the inner lock cylinder 110 and the outer lock cylinder 120. The dialing foot body 200 has a hollow sleeve 210 and a tongue 220 arranged on the outer wall of the middle sleeve. The tongue 220 is used to drive the lock tongue of the door lock to move, that is, the tongue 220 is used to control the locking or unlocking of the door lock. A positioning ring 212 is arranged on the inner wall of the hollow sleeve 210. A dialing foot ring 300 abuts against the outer side of the positioning ring 212. The dialing foot ring 300 is sleeved in the hollow sleeve 210. The positioning ring 212 positions the dialing foot ring 300 so that the dialing foot ring 300 cannot move towards the inner side of the hollow sleeve 210; the dialing foot ring 300 is provided with a receiving groove 320 for receiving a connecting key 330. Correspondingly, a sliding groove 211 cooperating with the connecting key 330 is arranged on the inner wall of the hollow sleeve 210. The connecting key 330 can transmit torque between the dialing foot ring 300 and the dialing foot body 200, that is, the dialing foot ring 300 drives the dialing foot body 200 to rotate through the connecting key 330; the connecting key 330 is set as a steel ball. A part of the steel ball is received in the receiving groove 320, and the other part is clamped on the sliding groove 211. The steel ball abuts against the positioning ring 212 to prevent the steel ball from moving towards the inside of the hollow sleeve 210 and being unable to transmit torque. Since the steel ball is spherical, it is easier to slide off the sliding groove 211 and separate from the dialing foot body 200 after the dialing foot body 200 is exposed outward; a card slot 310 is also arranged on the dialing foot ring 300. End parts of the inner lock cylinder 110 and the outer lock cylinder 120 are both provided with clamping blocks 111 cooperating with the card slot 310. End parts of the inner lock cylinder 110 and the outer lock cylinder 120 are telescopically arranged at both ends of the hollow sleeve 210. Torque is transmitted through the cooperation of the clamping blocks 111 and the card slot 310. Both the inner lock cylinder 110 and the outer lock cylinder 120 can indirectly drive the dialing foot body 200 to rotate through the dialing foot ring 300, so as to realize the locking or unlocking of the door lock.

[0033] Refer to Figure 3 and Figure 4, in this embodiment, the inner lock cylinder 110 is further provided with a locking component 400. Specifically, the locking component 400 includes a locking pin 410, a first elastic member 420 and a second elastic member 430. Both the first elastic member 420 and the second elastic member 430 are compression springs. The inner lock cylinder 110 is circumferentially provided with a first stepped portion 113, and the inside of the hollow sleeve 210 is provided with a second stepped portion 214. The second elastic member 430 is sleeved on the inner lock cylinder 110, and one end of the second elastic member 430 abuts against the first stepped portion 113 and the other end abuts against the second stepped portion 214. Two lock holes 213 that cooperate with the locking pin 410 are symmetrically arranged on the side wall of the hollow sleeve 210. The inner lock cylinder 110 is radially provided with a through first accommodation cavity 112. The first elastic member 420 is accommodated in the first accommodation cavity 112. The two ends of the first accommodation cavity 112 respectively accommodate the locking pin 410. The diameter of the locking pin 410 is larger than that of the lock hole 213. A third stepped portion 412 that just matches the lock hole 213 is provided at one end of the locking pin 410 protruding outwards, and a second accommodation cavity 411 is provided at the other end. The two ends of the first elastic member 420 are respectively accommodated in the second accommodation cavities 411 of the two locking pins 410. On the one hand, it is convenient to install the locking pin 410, and on the other hand, it makes the connection of the first elastic member 420 firm, preventing the first elastic member 420 from shifting and failing. When the lock body 100 is not damaged, the second elastic member 430 is in a compressed state, and the third stepped portion 412 of the locking pin 410 abuts against the inner wall of the hollow sleeve 210 under the action of the first elastic member 420. When the outside of the lock body 100 is broken off, under the action of the second elastic member 430, the toggle body 200 axially moves outwards, so that the third stepped portion 412 of the locking pin 410 is clamped on the lock hole 213, connecting the toggle body 200 and the inner lock cylinder 110 into one body. When the door lock is locked, the inner lock cylinder 110 and the lock body 100 are in a locked state, that is, at this time the toggle body 200 is also in a locked state, and the toggle body 200 cannot rotate or be pulled out, having a certain anti-theft effect.

[0034] Install the lock core on the door. On the inner side of the door, unlocking can be achieved by inserting the latch block 111 of the inner lock cylinder 110 into the card slot 310 and driving the dial foot body 200 to rotate. On the outer side of the door, unlocking can be achieved by inserting the latch block 111 of the outer lock cylinder 120 into the card slot 310 and driving the dial foot body 200 to rotate; when the outer side of the lock body 100 is forcibly broken on the outer side of the door, the outer lock cylinder 120 is separated from the lock body 100, and the dial foot body 200 is exposed outward. Under the action of the second elastic member 430, the dial foot body 200 moves outward, and the lock pin 410 is clamped in the lock hole 213 under the action of the first elastic member 420, connecting the dial foot body 200 and the inner lock cylinder 110 into one body. When the door lock is locked, the inner lock cylinder 110 and the lock body 100 are in a locked state. Therefore, the dial foot body 200 and the lock body 100 are also in a locked state. During the process of forcibly breaking the lock body 100, due to reasons such as vibration and the inclination of the lock body 100, the dial foot ring 300 and the steel balls in the dial foot body 200 are separated from the dial foot body 200, resulting in the lack of a force application point for rotating the dial foot body 200, that is, the card slot 310. It is impossible to insert a caliper or other tool into the card slot 310 to forcibly rotate the dial foot body 200 on the outer side of the door. At the same time, the steel balls are small in volume and are not easy to retrieve after separation. Even if the dial foot ring 300 is reinstalled, the dial foot ring 300 can only rotate idly in the hollow sleeve 210 and cannot drive the dial foot body 200 to rotate, that is, it is impossible to unlock on the outer side of the door, having good anti-theft performance; it can be understood that since the dial foot body 200 and the inner lock cylinder 110 are connected into one body, unlocking can still be achieved by driving the dial foot body 200 to rotate through the inner lock cylinder 110 on the inner side of the door. After the lock core is damaged, it does not affect unlocking on the inner side of the door.

[0035] In some other embodiments, it can be understood that the connecting key 330 is set as a cylindrical plug (not shown in the figure). The plug is arranged axially in the receiving groove 320. A part of the plug is received in the receiving groove 320, and the other part is clamped on the sliding groove 211, which can also achieve torque transmission. And when the dial foot body 200 is exposed outward, the plug is also easy to slip out of the slot. Without the plug, even if the dial foot ring 300 is reinstalled, the dial foot ring 300 cannot drive the dial foot body 200 to rotate, that is, it is impossible to unlock by driving the dial foot body 200 to rotate through the dial foot ring 300, having an anti-theft effect.

[0036] Furthermore, the diameter of the steel ball is less than 5 mm. Preferably, the diameter of the steel ball is 2 mm. On the premise of ensuring that the steel ball can transmit torque, the volume of the steel ball is small and it is not easy to retrieve after the steel ball falls off. After the dial foot body 200 is exposed outward, even if the dial foot ring 300 is reinstalled, the dial foot ring 300 cannot drive the dial foot body 200 to rotate.

[0037] Refer to Figure 5Furthermore, the length direction of the slide groove 211 is set along the axial direction of the hollow sleeve 210, and the slide groove 211 extends to the end of the hollow sleeve 210, which is convenient for installing the connecting key 330 on the one hand, and on the other hand, the connecting key 330 is easily detached from the pin body 200 after the pin body 200 is exposed outward.

[0038] Furthermore, the slide groove 211 is arranged on the upper side of the inner wall of the hollow sleeve 210, or when the lock core is installed, the slide groove 211 is placed on the upper side. When the outer side of the lock body 100 is broken off to expose the pin body 200 to the outside, after the pin ring 300 is separated from the pin body 200, the connecting key 330 is easy to separate from the pin body 200 under the action of gravity, and it is not easy to find it after separation, so that the pin ring 300 cannot drive the pin body 200 to rotate.

[0039] Reference Figure 6 Furthermore, the outer wall of the foot dial ring 300 is set to a conical surface 340, and the small end of the conical surface 340 is located on the inner side of the hollow sleeve 210. On the one hand, the conical surface 340 is equivalent to a chamfer, which is convenient for the foot dial ring 300 to be installed in the hollow sleeve 210. On the other hand, the contact area between the outer wall of the foot dial ring 300 and the inner wall of the hollow sleeve 210 is reduced, and the friction force is reduced. After the foot dial body 200 is exposed to the outside, the foot dial ring 300 is easy to detach from the foot dial body 200, and it is not easy to rotate the foot dial body 200, which further improves the anti-theft performance of the lock core.

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An anti-theft lock core, characterized in that, it includes: a lock body (100), with an inner lock cylinder (110) and an outer lock cylinder (120) respectively connected to both ends of the lock body (100), and clamping blocks (111) are provided at the ends of the inner lock cylinder (110) and the outer lock cylinder (120); a dial foot body (200), rotatably arranged between the inner lock cylinder (110) and the outer lock cylinder (120), the dial foot body (200) has a hollow sleeve (210), a chute (211) is provided on the inner wall of the hollow sleeve (210), and a positioning ring (212) is arranged inside the hollow sleeve (210); a dial foot ring (300), sleeved inside the hollow sleeve (210), the dial foot ring (300) is provided with a card slot (310) that cooperates with the clamping block (111), the dial foot ring (300) is provided with a receiving groove (320), a connecting key (330) that cooperates with the chute (211) is received in the receiving groove (320), the connecting key (330) is set as a steel ball or a cylindrical pin, and the dial foot ring (300) and the connecting key (330) abut against the positioning ring (212); a locking assembly (400), arranged on the inner lock cylinder (110), and the locking assembly (400) is used to lock the inner lock cylinder (110) and the dial foot body (200).

2. An anti-theft lock core according to claim 1, characterized in that: the steel ball is received in the receiving groove (320), and the steel ball cooperates with the chute (211).

3. An anti-theft lock core according to claim 2, characterized in that: the diameter of the steel ball is less than 5 mm.

4. An anti-theft lock core according to claim 1, characterized in that: the pin is received in the receiving groove (320), and the pin cooperates with the chute (211).

5. An anti-theft lock core according to claim 1, characterized in that: the chute (211) is arranged along the axial direction of the hollow sleeve (210), and the chute (211) extends to the end of the hollow sleeve (210).

6. An anti-theft lock core according to claim 1, characterized in that: the chute (211) is arranged on the upper side of the hollow sleeve (210).

7. An anti-theft lock core according to claim 1, characterized in that: the outer wall of the dial foot ring (300) is provided with a conical surface (340), and the small end of the conical surface (340) is located inside the hollow sleeve (210).

8. An anti-theft lock core according to claim 1, characterized in that: The locking assembly (400) includes a locking pin (410), a first elastic member (420) and a second elastic member (430). A locking hole (213) cooperating with the locking pin (410) is provided on the side wall of the hollow sleeve (210). A first receiving cavity (112) is radially provided on the inner lock cylinder (110). The first elastic member (420) and the locking pin (410) are sequentially received in the first receiving cavity (112) from the inside outwards. The second elastic member (430) is arranged between the inner lock cylinder (110) and the hollow sleeve (210).

9. An anti-theft lock core according to claim 8, wherein: The locking pin (410) is provided with a second receiving cavity (411), and one end of the first elastic member (420) is received in the second receiving cavity (411).

Images