ANTI-THEFT STRUCTURE COMPRISING A LOCK CORE AND A KEY

Abstract

An anti-theft structure comprising a lock core consisting of a lock core seat, a lock core shell, a thrust plate provided in a sliding groove of the lock core shell, lock plates and washers provided alternately and superimposed in the lock core shell, a limiting plate and a positioning plate disposed on the lock core shell and placed in the lock core seat together with the shell, a latch lever, a brake bolt plate provided in a receiving groove of the lock core seat, a compression spring provided in a groove of the lock core seat and pushing against the brake bolt plate, a positioning deflector provided in a receiving chamber of the lock core seat and located at the bottom of the lock core shell,and a retaining ring embedded in an annular groove in the lock core seat; and a key provided with an annular groove.

Description

Title of the invention: ANTI-THEFT STRUCTURE COMPOSED OF A LOCK CORE AND A KEY Field of Invention

[0001] The invention relates to an anti-theft structure composed of a lock core and a key, more particularly to an inner bottom surface of a lock core shell which is provided with a thrust plate, and inside a lock core seat which is provided with a braking bolt plate, so that the lock core cannot be rotated when a key is not fully inserted to reach the inner bottom surface of the lock core shell, thus optimal anti-theft effectiveness can be achieved, and a limiting plate is provided in the lock core seat, capable of preventing the key from rotating when the key is not fully removed from the lock core, so that a key inlet of each lock plate in the lock core will not be out of position, and when the key is inserted into the key inlet of each of the lock plates again, the key can be inserted smoothly. State of the Art

[0002] For the lock core structure of a conventional disc tumbler lock, please refer to Figures 1 and 2. The conventional disc tumbler lock is mainly provided with a lock core 1 composed of a lock core seat 10, a lock core shell 11, a latch lever 12, a plurality of lock plates 13, a plurality of washers 14 and a positioning plate 15. The lock core seat 10 is provided with a receiving chamber 100, an inner wall surface of the receiving chamber 100 is provided with a recess groove 101, and the latch lever 12 is recessed in the recess groove 101. The lock core seat 10 is provided with a key insertion hole 102, the lock core shell 11 is disposed in the receiving chamber 100 of the lock core seat 10, and a wall surface of the lock core shell 11 is provided with a cutting groove 110 and a notch 111.A portion of the latch lever 12 is embedded in the cutting groove 110 of the lock core shell 11, the lock plates 13 and the washers 14 are alternately provided in the lock core shell 11. Each of the lock plates 13 is provided with a keyway 130, an outer edge of each of the lock plates 13 is provided with an arc notch 131, the arc notch 131 is provided for embedding the latch lever 12, the outer edge of each of the lock plates 13 is further provided with a projection 132, and the projection 132 is disposed in the notch 111 of the core shell. of lock 11. Each of the washers 14 is provided with a perforation 140, an outer edge of each of the washers 14 is provided with an arc-shaped notch 141, the arc-shaped notch 141 is provided for embedding the latch lever 12, the outer edge of each of the washers 14 is further provided with a flange 142, and the flange 142 is disposed in the notch 111 of the lock core shell 11. The positioning plate 15 is disposed at an end portion of the lock core shell 11, a keyway 150 is provided on the positioning plate 15, and two corresponding long edges of the keyway 150 are provided with a convex body 151 respectively.Thus, the lock core structure of the conventional disc tumbler lock is formed, by inserting a key from the key insertion hole 102 of the lock core seat 10 into the keyway 150 of the positioning plate 15, the keyway 130 of each of the lock plates 13 and the perforation 140 of each of the washers 14 in the lock core shell 11, after a guide groove on the key is aligned with the convex bodies 151 on the positioning plate 15, and grooves cut on two opposite wall surfaces of the key are aligned with the positions of each of the lock plates 13 and each of the washers 14, the key can be rotated to cause the lock core shell 11 to rotate to realize the unlocking and locking actions.However, if an incorrect key is inserted into the keyway 130 of each of the lock plates 13 in the lock core shell 11 of the conventional disc tumbler lock, each of the lock plates 13 can still be rotated by about ninety degrees (i.e., an angle of the notch 111 on the lock core shell 11). If a user does not fully insert the key to reach the inner bottom surface of the lock core shell 11 or a burglar turns the lock forcefully with an incorrect key, the keyways 130 of the lock plates 13 or the key will be easily deformed or broken, resulting in uneven unlocking and locking rotation when the key is inserted into the lock core 11 again, and its anti-theft effectiveness is easily reduced.In addition, the lock plates 13 in the lock core shell 11 of the conventional disc tumbler lock will be rotated out of position (as shown in [Fig. 2]) due to vibration generated by a moving vehicle after the key is removed, resulting in the inability of the keyway 130 on each of the lock plates 13 to align with each other. When the key is inserted into the keyways 150, 130 again, the key should be shaken slightly and slowly inserted into the keyway 150 of the positioning plate 15 and the keyway 130 of each of the lock plates 13, until, after the keyway 150 of the positioning plate 15 and the keyway 130 of each of the lock plates 13 are completely aligned, the key can be completely inserted to reach the inner bottom surface of the shell. lock core 11 to rotate the lock core shell 11 to achieve unlocking purpose. Therefore, it is extremely inconvenient and troublesome to use the key for unlocking or locking. Summary of the invention

[0003] A main objective of the invention is to provide an anti-theft structure composed of a lock core and a key capable of effectively solving the disadvantages of the conventional lock core and key in use.

[0004] An anti-theft structure composed of a lock core and a key of the invention comprising:

[0005] a lock core comprising a lock core seat, a lock core shell, a positioning plate and a latch lever, wherein a receiving chamber is provided in the lock core seat, an inner wall surface of the receiving chamber is provided with a recess groove, the lock core seat is provided with a key insertion hole, the lock core shell is provided in the receiving chamber of the lock core seat, a wall surface of the lock core shell is provided with a cutting groove and a notch, a plurality of lock plates and a plurality of washers are alternately and superimposedly provided in the lock core shell, each of the lock plates is provided with a keyway, an outer edge of each of the lock plates is provided with an arc-shaped notch, the outer edge of each of the lock plates is further provided with a protrusion,the protrusion is arranged in the notch of the lock core shell, each of the washers is provided with a perforation, an outer edge of each of the washers is provided with an arc notch, the outer edge of each of the washers is further provided with a flange, the flange is arranged in the notch of the lock core shell, the positioning plate is arranged on an end portion of the lock core shell and placed in the receiving chamber of the lock core seat, a keyway is provided on the positioning plate, two corresponding long edges of the keyway are provided with a convex body respectively, a part of the latch lever is embedded in the cutting groove of the lock core shell, and embedded in the arc notches of the lock plates and the washers, another part of the latch lever is embedded in the embedding groove of the lock core seat; and,

[0006] a key to be inserted into the lock core, a guide groove being provided on two opposite wall surfaces of the key respectively, a plurality of toothed grooves being provided on the wall surface of the key, and each of the toothed grooves corresponding to a position of each of the lock plates of the lock core respectively;

[0007] characterized in that: a wall surface of the receiving chamber of the lock core seat is provided with a receiving groove, one side of the receiving groove is provided with an axis hole, another side of the receiving groove is provided with a groove, the inside of the receiving chamber of the lock core seat is annularly provided with an annular groove, an inner bottom surface of the lock core shell is provided with a sliding groove, the inside of the sliding groove is provided with a concave hole, a thrust plate is provided in the sliding groove of the lock core shell, a perforation is provided on the thrust plate, a limiting plate is disposed between the lock core shell and the positioning plate, and disposed in the receiving chamber of the lock core seat, the limiting plate is provided with a key inlet,two corresponding long edges of the keyway are respectively provided with an arc groove, an outer edge of the limiting plate is provided with a protrusion, the protrusion is embedded in the embedding groove of the lock core seat, a brake bolt plate is provided in the receiving groove of the lock core seat, one side of the brake bolt plate is provided with a pivot pin, the pivot pin is arranged in the pin hole of the lock core seat, a compression spring is provided in the groove of the lock core seat, the compression spring pushes against the brake bolt plate, a positioning baffle is provided in the receiving chamber of the lock core seat and is located at the bottom of the lock core shell, the positioning baffle is provided with a through hole,the positioning baffle is protrudingly provided with a first baffle corresponding to a position of the embedding groove of the lock core seat, the positioning baffle is protrudingly provided with a second baffle corresponding to positions of the receiving groove and the groove of the lock core seat, a retaining ring is provided on an outer side of the positioning baffle, the retaining ring is embedded in the annular groove of the lock core seat, the key is provided with an annular groove, and the annular groove corresponds to a position of the limiting plate in the lock core.

[0008] The anti-theft structure composed of the lock core and the key of the invention has the advantages that: when the key is inserted into the lock core for unlocking, the key must be completely inserted into the lock core before the key can be rotated to cause the lock core shell to rotate to form an unlocking mechanism, the key can be prevented from rotating when the key is not completely removed from the lock core, so that the key inlet of each of the lock plates in the lock core will not be out of position, and when the key is inserted into the key inlet of each of the lock plates lock again, the key can be inserted smoothly, thus achieving long service life for the lock core and key and optimal anti-theft effectiveness. Brief description of the drawings

[0009] [Fig-1] is an exploded perspective view of a conventional lock core structure.

[0010] [Fig.2] is a cross-sectional view of the lock core structure classic.

[0011] [Fig.3] is an exploded perspective view of one embodiment of the invention.

[0012] [Fig.4] is an exploded perspective view of a lock core from another angle of an embodiment of the invention.

[0013] [Fig.5] is a perspective view of the lock core and a key of one embodiment of the invention.

[0014] [Fig.6] is an assembled cross-sectional view of the lock core of one embodiment of the invention.

[0015] [Fig.7] is a cross-sectional view of the lock core without the key inserted according to one embodiment of the invention.

[0016] [Fig.8] is an assembled cross-sectional view of the key inserted into a keyway of the lock core according to one embodiment of the invention.

[0017] [Fig.9] is a cross-sectional view of the lock core with the key inserted in the key entry of the lock core according to one embodiment of the invention.

[0018] [Fig. 10] is a cross-sectional view of the key removed from the lock core according to one embodiment of the invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] With regard to the technical means adopted by the invention to achieve the above-mentioned objective and effectiveness, a preferred and feasible embodiment is explained in detail below in connection with the figures.

[0020] Please refer to Figures 3 to 5 for one embodiment of the invention. An anti-theft structure composed of a lock core and a key of the invention is mainly provided with a lock core 2, the lock core 2 is composed of a lock core seat 20, a lock core shell 21, a thrust plate 22, a plurality of lock plates 23, a plurality of washers 24, a limiting plate 25, a positioning plate 26, a latch lever 27, a brake bolt plate 28, a compression spring 29, a positioning baffle 30 and a retaining ring 31. The lock core seat 20 is provided with an accommodating chamber 200, a wall surface of the accommodating chamber 200 is provided with a recess groove 201, and the wall surface of the accommodating chamber 200 is further provided with a groove of receiving 202. One side of the receiving groove 202 is provided with an axis hole 203, another side of the receiving groove 202 is provided with a groove 204, and the inside of the receiving chamber 200 of the lock core seat 20 is annularly provided with an annular groove 205. The lock core seat 20 is provided with a key insertion hole 206, the lock core shell 21 is disposed in the receiving chamber 200 of the lock core seat 20, and a wall surface of the lock core shell 21 is provided with a cutting groove 210 and a notch 211. An inner bottom surface of the lock core shell 21 is provided with a sliding groove 212, the inside of the sliding groove 212 is provided with a hole concave 213, the push plate 22 is provided in the sliding groove 212 of the lock core shell 21, and a perforation 220 is provided on the push plate 22.The lock plates 23 and the washers 24 are provided alternately and superimposed in the lock core shell 21. Each of the lock plates 23 is provided with a keyway 230, an outer edge of each of the lock plates 23 is provided with an arc-shaped notch 231, the arc-shaped notch 231 is provided for embedding the latch lever 26, the outer edge of each of the lock plates 23 is further provided with a projection 232, and the projection 232 is disposed in the notch 211 of the lock core shell 21. Each of the washers 24 is provided with a perforation 240, an outer edge of each of the washers 24 is provided with an arc-shaped notch 241, the arc-shaped notch 241 is provided for embedding the latch lever 26. latch 26, the outer edge of each of the washers 24 is further provided with a flange 242, and the flange 242 is disposed in the notch 211 of the lock core shell 21.The limiting plate 25 is arranged on an end portion of the lock core shell 21 and placed in the receiving chamber 200 of the lock core seat 20, the limiting plate 25 is provided with a keyway 250, two corresponding long edges of the keyway 250 are respectively provided with an arc groove 251, and an outer edge of the limiting plate 25 is provided with a protrusion 252. The positioning plate 26 is arranged on an outer side of the limiting plate 25, a keyway 260 is provided on the positioning plate 26, and two corresponding long edges of the keyway 260 are provided with a convex body 261 respectively. A portion of the latch lever 27 is embedded in the cutting groove 210 of the lock core shell 21, and another portion of the latch lever 27 is embedded in the embedding groove 201 of the lock core seat 20.The brake bolt plate 28 is provided in the receiving groove 202 of the lock core seat 20, one side of the brake bolt plate 28 is provided with a pivot pin 280, the pivot pin 280 is arranged in the pin hole 203 of the lock core seat 20, the compression spring 29 is provided in the groove 204 of the lock core seat. 20, and the compression spring 29 pushes against an end portion of the brake bolt plate 28. The positioning baffle 30 is provided in the receiving chamber 200 of the lock core seat 20 and is located at the bottom of the lock core shell 21, the positioning baffle 30 is provided with a through hole 300, the positioning baffle 30 is projectingly provided with a first baffle 301 corresponding to a position of the embedding groove 201 of the lock core seat 20, and the positioning baffle 30 is projectingly provided with a second baffle 302 corresponding to positions of the receiving groove 202 and the groove 204 of the lock core seat 20. The retaining ring 31 is provided on an outer side of the positioning baffle 30, and the ring retaining member 31 is embedded in the annular groove 205 of the lock core seat 20.A key 4 is provided to be inserted into the lock core 2, a guide groove 40 is provided on two opposite wall surfaces of the key 4 respectively, a plurality of toothed grooves 41 are provided on the wall surface of the key 4, and each of the toothed grooves 41 corresponds to a position of each of the lock plates 23 of the lock core 2 respectively. The key 4 is further provided with an annular groove 42, and the annular groove 42 corresponds to a position of the limiting plate 25 in the lock core 2. Thus, the anti-theft structure composed of the lock core 2 and the key 4 of the invention is formed.

[0021] Please refer to Figures 3 to 6 to assemble the lock core 2. First, place the thrust plate 22 in the sliding groove 212 of the lock core shell 21, and then sequentially insert the lock plates 23 and the washers 24 into the lock core shell 21 alternately, the projection 232 of each of the lock plates 23 and the flange 242 of each of the washers 24 are aligned with each other and are arranged in the notch 211 of the lock core shell 21, and then a part of the latch lever 27 is embedded in the cutting groove 210 of the lock core shell 21.The limiting plate 25 and the positioning plate 26 are arranged in a superimposed manner on the end portion of the lock core shell 21, the compression spring 29 is placed in the groove 204 of the lock core seat 20, and the brake bolt plate 28 is arranged in the receiving groove 202 of the lock core seat 20. The pivot pin 280 of the brake bolt plate 28 is arranged in the pin hole 203 of the lock core seat 20, so that the brake bolt plate 28 is able to rotate and swing by using the pivot pin 280 as a pivot point, and then the limiting plate 25, the positioning plate 26 and the lock core shell 21 assembled as described above are placed in the receiving chamber 200 of the lock core seat 20. Another part of the latch lever 27 projecting from the lock core shell 21 and the projection 252 of the . limiting plate 25 are embedded in the embedding groove 201 of the lock core seat 20. The end portion of the brake bolt plate 28 is urged by the compression spring 29 to abut against wall surfaces of each of the lock plates 23 and each of the washers 24 located in the notch 211 in the lock core shell 21, and abut against the projection 232 of each of the lock plates 23 and the flange 242 of each of the washers 24, so that each of the lock plates 23 and each of the washers 24 can be retained and positioned. The positioning baffle 30 is disposed in the receiving chamber 200 of the lock core seat 20.The bottom of the lock core shell 21 is inserted into the through hole 300 of the positioning baffle 30, the first baffle 301 of the positioning baffle 30 is embedded in the embedding groove 201 of the lock core seat 20 for positioning, and the second baffle 302 of the positioning baffle 30 is arranged in the receiving groove 202 and the groove 204 of the lock core seat 20, so that the brake bolt plate 28 and the compression spring 29 can be retained and positioned. Then, the retaining ring 31 is snapped into the annular groove 205 of the lock core seat 20, and the positioning baffle 30 is positioned in the receiving chamber 200 of the lock core seat 20, thus a complete assembly of the lock core 2 can be completed.

[0022] The lock core 2 of the invention can be assembled on various types of locks. Please refer to Figures 6 to 10 for the use of the lock core 2 and the key 4 of the invention. When unlocking, insert the key 4 into the key insertion hole 206 of the lock core seat 20, and then penetrate deeply into the key inlet 230 of each of the lock plates 23 and the perforation 240 of each of the washers 24 in the lock core shell 21 through the key inlets 260 and 250 of the positioning plate 26 and the limiting plate 25.When a bottom end of the key 4 is inserted to reach the inner bottom surface of the lock core shell 21, by inserting the key 4 into the perforation 220 of the push plate 22, the push plate 22 is pushed by the bottom end of the key 4 to slide in the sliding groove 212 of the lock core shell 21, an end portion of the push plate 22 pushes against the brake bolt plate 28 to rotate (as shown in FIGS. 8 and 9), the brake bolt plate 28 rotates and presses the compression spring 29 to put the compression spring 29 into an elastic compression state. After the brake bolt plate 28 is pushed by the push plate 22 to rotate and move in the receiving groove 202, the projection 232 of each of the lock plates 23 and the flange 242 of each of the washers 24 are no longer blocked.In this way, the key 4 can be turned to cause the lock core shell 21 to rotate to complete. the unlocking action. When the key 4 is not inserted into the lock core 2 (as shown in FIGS. 6 and 7), the projection 232 of each of the lock plates 23 and the flange 242 of each of the washers 24 in the lock core shell 21 are blocked by the brake bolt plate 28 and cannot be rotated (as shown in [Fig. 7]). When a user inserts the correct key 4 into the key insertion hole 206 of the lock core seat 20, the keyway 250 of the limiting plate 25, the keyway 260 of the positioning plate 26 and the keyway 230 of each of the lock plates 23, if the key 4 is not inserted to reach the bottom, the projection 232 of each of the lock plates 23 and the flange 242 of each of the washers 24 are still blocked by the brake bolt plate 28 and cannot be rotated,so the key 4 must be inserted to reach the inner bottom surface of the lock core shell 21, the push plate 22 is pushed by the bottom end of the key 4 to slide, the push plate 22 pushes against the brake bolt plate 28 to rotate, the projection 232 of each of the lock plates 23 and the flange 242 of each of the washers 24 are no longer blocked, so that the key 4 can be rotated to cause the lock core shell 21 to rotate to complete the unlocking action. After the key 3 completes unlocking and is returned to a vertical position, the projection 232 of each of the lock plates 23 and the flange 242 of each of the washers 24 are aligned with each other again, and then the key 4 is removed from the lock core 2, the push plate 22 is no longer pushed by the key 4,the brake bolt plate 28 and the thrust plate 22 are pushed back to the original positions by the elastically returned compression spring 29 (as shown in FIGS. 6 and 7), so that the brake bolt plate 28 locks the projection 232 of each of the lock plates 23 and the flange 242 of each of the washers 24 in the lock core shell 21 again, and thus the lock plates 23 and the washers 24 cannot be rotated. When the key 4 is to be removed from the lock core 2, and the key 4 has not been completely removed from the lock core 2 (as shown in [Fig. 10]), the rotation being limited by the protrusion 252 of the limiting plate 25 embedded in the embedding groove 201 of the lock core seat 20, the key 4 cannot be arbitrarily rotated during a process of removing the lock core 2, and can only be removed straightly without rotating,so that the key 4 can be prevented from rotating when removed from the lock core 2, and the keyway 230 of each of the lock plates 23 in the lock core 2 will not be out of position, when the key 4 is inserted into the keyway 230 of each of the lock plates 23 again, the key 4 can be inserted smoothly.

[0023] By arranging the sliding groove 212 and the thrust plate 22 on the inner bottom surface of the lock core shell 21 of the invention, when the key 4 is not not fully inserted to reach the inner bottom surface of the lock core shell 21, the key 4 cannot be rotated, which is able to prevent the key 4 from being deformed or broken due to the forced rotation of the lock core 2, prolong a service life of the key 4 and the structure of the lock core 2, and provide excellent anti-theft effectiveness. By arranging the limiting plate 25, the key 4 can be prevented from rotating when the key 4 is not fully removed from the lock core 2, so that the key inlet 230 of each of the lock plates 23 in the lock core 2 will not be out of position, when the key 4 is inserted into the key inlet 230 of each of the lock plates 23 again, the key 4 can be inserted smoothly.

[0024] In summary, the invention has indeed achieved the intended purpose and efficiency of use, and is more ideal and practical than the prior art. However, the above-mentioned embodiment is only the specific description of the preferred embodiment of the invention, the embodiment is not intended to limit the claims of the invention, and all other equivalent changes and modifications made without departing from the technical means disclosed in the invention should be included in the claims covered by the invention.

Claims

[Claim 1] Claims Anti-theft structure composed of a lock core and a key including: a lock core comprising a lock core seat, a lock core shell, a positioning plate and a latch lever, wherein a receiving chamber is provided in the lock core seat, an inner wall surface of the receiving chamber is provided with a recess groove, the lock core seat is provided with a key insertion hole, the lock core shell is provided in the receiving chamber of the lock core seat, a wall surface of the lock core shell is provided with a cutting groove and a notch, a plurality of lock plates and a plurality of washers are alternately and superimposedly provided in the lock core shell, each of the lock plates is provided with a keyway, an outer edge of each of the lock plates is provided with an arc notch, the outer edge of each of the lock plates is further provided with a protrusion,the protrusion is arranged in the notch of the lock core shell, each of the washers is provided with a perforation, an outer edge of each of the washers is provided with an arc notch, the outer edge of each of the washers is further provided with a flange, the flange is arranged in the notch of the lock core shell, the positioning plate is arranged on an end portion of the lock core shell and placed in the receiving chamber of the lock core seat, a keyway is provided on the positioning plate, two corresponding long edges of the keyway are provided with a convex body respectively, a part of the latch lever is embedded in the cutting groove of the lock core shell, and embedded in the arc notches of the lock plates and the washers, another part of the latch lever is embedded in the embedding groove of the lock core seat; and, a key to be inserted into the lock core, a guide groove being provided on two opposite wall surfaces of the key respectively, a plurality of toothed grooves being provided on the wall surface of the key, and each of the toothed grooves corresponding to a position of each of the lock plates of the lock core respectively; characterized in that: a wall surface of the receiving chamber of the lock core seat is provided with a receiving groove, one side of the receiving groove is provided with an axis hole, another side of the receiving groove is provided with a groove, the inside of the receiving chamber of the lock core seat is annularly provided with an annular groove, an inner bottom surface of the lock core shell is provided with a sliding groove, the inside of the sliding groove is provided with a concave hole, a thrust plate is provided in the sliding groove of the lock core shell, a perforation is provided on the thrust plate, a limiting plate is arranged between the lock core shell and the positioning plate, and arranged in the receiving chamber of the lock core seat, the limiting plate is provided with a keyway, two corresponding long edges of the keyway are respectively provided with an arc groove,an outer edge of the limiting plate is provided with a protrusion, the protrusion is embedded in the embedding groove of the lock core seat, a brake bolt plate is provided in the receiving groove of the lock core seat, one side of the brake bolt plate is provided with a pivot pin, the pivot pin is arranged in the pin hole of the lock core seat, a compression spring is provided in the groove of the lock core seat, the compression spring pushes against the brake bolt plate, a positioning baffle is provided in the receiving chamber of the lock core seat and is located at the bottom of the lock core shell, the positioning baffle is provided with a through hole, the positioning baffle is projectingly provided with a first baffle corresponding to a position of the embedding groove of the lock core seat,the positioning baffle is protrudingly provided with a second baffle corresponding to positions of the receiving groove and the groove of the lock core seat, a retaining ring is provided on an outer side of the positioning baffle, the retaining ring is embedded in the annular groove of the lock core seat, the key is provided with an annular groove, and the annular groove corresponds to a position of the limiting plate in the lock core.,

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