CN108798267B - Antitheft lock and key matched with same - Google Patents

Abstract

The invention relates to the field of mechanical locks, and discloses an anti-theft lock, which comprises a lock body (1) and a lock cylinder (2) positioned in the lock body (1), wherein a key slot for inserting a key is formed in the lock cylinder (2), and the anti-theft lock is characterized in that: the key slot comprises a front section and a rear section, wherein the key slot of the front section is a straight slot (24), the key slot of the rear section is a chute (25), and the included angle between the chute (25) and the straight slot (24) is smaller than 180 degrees. The key slot of the lock core in the market at present is a straight slot, and the key slot of the lock core is firstly the straight slot and then the inclined slot, namely the key slot has the characteristic of turning, compared with the lock core with the straight slot at present, the technical unlocking tool is difficult to turn in the slot to enable the tool to turn into the inclined slot to unlock further after extending into the straight slot, thereby greatly improving the anti-theft performance of the lockset.

Description

Antitheft lock and key matched with same

Technical Field

The invention relates to the field of mechanical locks, in particular to a lock with very outstanding anti-theft performance.

Background

Currently, the domestic lock core market includes locks of three levels A, B, C. The class A lock generally comprises a traditional straight lock, a cross lock, a crescent lock and locks with a row of marble structures in most lock cylinders, the anti-theft performance is poor, the mutual unlocking rate is extremely high, the technical unlocking time is generally about a few seconds to two minutes, and among numerous theft cases which occur in China, the class A lock is adopted by most of stolen portals. The B-stage lock is provided with double-row spring grooves, and the B-stage lock is different from the A-stage lock in that the key surface is provided with a row of grooves with irregular bending curves, the main types of the lock cylinders are 3 types, the computer double-row lock cylinders, the double-row crescent lock cylinders and the double-sided blade lock cylinders are prevented from being technically opened within 5 minutes, the mutual opening rate is high, and the lock cylinders can be opened within 1 minute through a strong torsion tool. The C-level lock is safer in the market at present, and is technically impossible to open by adopting double-row computer compound curve groove keys for 270 minutes, but the C-level lock is more used in the financial industry and less used for civil use. The unlocking time of the three levels is different, the longer the time is, the higher the safety coefficient is, and the lower the possibility of being stolen is.

However, the key slot rails of the existing class A, class B and class C locks are all straight-through, so that a tool can enter the key slot, and then a thief uses skills to toggle the marble or the locking plate. In the straight-through track, the tool can be opened for experienced thieves, and the problem of long unlocking time is solved.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the anti-theft lock which is provided with the key slot track with the direction changing function, so that a tool cannot enter the innermost end of the key slot in a direction changing way, so that the so-called technical unlocking is stopped, and the anti-theft performance of the lock is greatly improved.

The technical scheme adopted for solving the technical problems is as follows: an anti-theft lock comprises a lock body and a lock core positioned in the lock body, wherein a key slot for inserting a key is arranged in the lock core, the key slot comprises a front section and a rear section, the key slot of the front section is a straight slot, the key slot of the rear section is a chute, and an included angle between the chute and the straight slot is smaller than 180 degrees.

It is known that a lock cylinder has two states, a locked state and an unlocked state, relative to a lock body, and is rotatable relative to the lock body when in the unlocked state. In addition, the front section and the rear section of the key slot are referred to by the sequence of key insertion, namely, the section of the key which is inserted first is the front section, and the section of the key which is inserted further after passing through the front section is the rear section.

The anti-theft lock has the beneficial effects that: the key slot of the lock core in the market at present is a straight slot, and the key slot of the lock core is firstly the straight slot and then the inclined slot, namely the key slot has the characteristic of turning, compared with the lock core with the straight slot at present, the technical unlocking tool is difficult to turn in the slot to enable the tool to turn into the inclined slot to unlock further after extending into the straight slot, thereby greatly improving the anti-theft performance of the lockset.

Further, the lock cylinder comprises a lock cylinder shell, a guide device and a marble component;

the lock cylinder shell comprises a front section and a rear section, the straight groove is positioned in the front section lock cylinder shell, and the rear section lock cylinder shell is provided with an inclined plane A;

the guide device is provided with an inclined plane B which is matched with the inclined plane A, and the chute is formed between the two inclined planes;

the ball component is arranged in the rear lock cylinder shell and the lock body corresponding to the chute and is used for limiting whether the lock cylinder shell can rotate relative to the lock body or not, and the ball component has two states of locking and unlocking;

after the chute is inserted into the matched key, the inclined plane B of the guiding device can push against one side surface of the key, so that the other side surface of the key pushes the marble component to be in the unlocking state.

In the above further scheme, the front section and the rear section of the lock cylinder shell are also referred to by the sequence of key insertion. The inclined plane A is not limited to be positioned in the rear section lock cylinder shell or on the outer surface, and the inclined plane B is not limited in the same way, so long as the inclined groove is formed between the inclined plane A and the inclined plane B; the ball assembly is a commonly adopted assembly of the ball lock (or called a ball lock) at present, and comprises a ball and a spring.

The principle of the further scheme is as follows: the key matched with the anti-theft lock passes through the straight groove and then turns to enter the chute, and the ball assembly is unlocked by the key in the chute, so that the ball assembly is in an unlocking state, and the purpose of unlocking is achieved. Each group of marble assemblies can have various arrangement modes, and different arrangement modes correspond to one arrangement mode of key holes, so that keys correspond to the marble assemblies one by one, and unlocking can be realized only if the arrangement modes correspond to each other.

Further, the guiding device is provided with an elastic component, and the elastic restoring force of the elastic component drives the guiding device to elastically push against the inclined plane A side.

In this further aspect, the purpose of the elastic component is: because the guiding device is elastically propped against the inclined plane A, when a key is inserted into the inclined groove, the guiding device can be retracted, so that the inclined groove is opened, the insertion of the key is facilitated, the guiding device can prop against the key after the insertion, the key is driven to prop against the marble component, and if the eyelet of the key is matched with the arrangement mode of the marble component, the marble component is in an unlocking state, so that the lock core is unlocked.

Further, the lock cylinder also comprises a sealing end head arranged on the back of the guide device, the elastic component comprises a connecting screw and a spring, the connecting screw sequentially penetrates through a first axial through hole on the sealing end head and a second axial through hole on the guide device and then is fixed in a threaded hole on the rear lock cylinder shell, the aperture of the second axial through hole is larger than the outer diameter of the connecting screw, the spring is sleeved outside the connecting screw and is installed in the second axial through hole, one end of the spring is tightly propped against the guide device, and the other end of the spring is tightly propped against the sealing end head.

Because the aperture of the second axial through hole on the guiding device is larger than the outer diameter of the connecting screw, the guiding device can move along the axial direction of the connecting screw, so that when a key is inserted into the chute, the key can push the guiding device to elastically retract so as to reduce the resistance when the key is inserted into the chute, and the inserted spring can push the guiding device to elastically push against the key, so that the ball assembly can be unlocked. In addition, the back surface of the guide device refers to the side where the key is inserted, and the side far away from the key is the back surface; the axial direction of the first axial through hole and the second axial through hole refers to the direction parallel to the axis of the straight groove.

Further, the lock cylinder is characterized by further comprising a connecting sheet used for limiting, wherein the end face of the sealing end head is in surface contact with the end face of the lock cylinder shell, one end of the connecting sheet is fixed on the sealing end head, and the other end of the connecting sheet is buckled on a boss structure of the outer wall of the lock body and is used for limiting the axial movement of the lock cylinder. Therefore, the end face of the sealing end is in surface contact with the end face of the lock cylinder shell, and the sealing end seals the guide device, so that the sealing end, the guide device and the lock cylinder shell can be pulled together by the connecting sheet and buckled on the boss structure of the lock body, and the axial movement of the lock cylinder is limited by the boss structure, but the boss structure does not limit the rotation of the lock cylinder relative to the lock body.

Further, a radial lock plate groove is arranged at the straight groove of the key groove, and a lock plate which is matched with the key to act is arranged in the lock plate groove in a sliding way. The lock plate groove and the lock plate are parts commonly adopted by the existing blade lock, and the lock plate groove and the lock plate are designed into the straight groove, so that the possibility that the lock cylinder rotates relative to the lock body during abnormal opening is further reduced, and the anti-theft performance of the lock is improved; the lock plate can be linked with the groove matched with the key, when the key is not inserted, the lock plate is in a locking state, so that the lock cylinder cannot rotate relative to the lock body, after the matched key is inserted, the groove can drive the lock plate to move, and the lock cylinder is in an unlocking state and can rotate after the lock plate moves in place. The radial direction refers to a direction perpendicular to the axis of the straight groove.

Further, the number of the inclined grooves is two or four, and the inclined grooves are symmetrically distributed. Of course, the number of the chute may be one, three or more, and two or four are only two of the preferred embodiments.

In the further scheme, the number of the inclined slots is more than one, so that the technical unlocking difficulty is further increased. At present, no tool can realize the direction change in the track of the key slot, if the tool with the direction change appears later, a thief can hardly stir the marble in the chute forcefully, and when the chute is more than one, the marble in a plurality of chutes needs to be simultaneously stirred to be unlocked, so that the unlocking of the tool or the thief is almost impossible to finish.

The invention also provides a key for being matched with the anti-theft lock, the key comprises a key handle and a key body for unlocking, the main body part of the key body is matched with the straight groove for forming, and the end part of the main body part is provided with a key sheet which is matched with the chute for forming and can be inserted into the chute.

The key of this scheme is designed to the most basic scheme of above-mentioned pickproof lock, and the main part of the key body corresponds straight flute, and the key piece of the key body corresponds the chute, is used for unblock straight flute and the chute of lock core respectively.

The other kind is used for cooperating the key that uses with above-mentioned pickproof lock, this key includes key handle and is used for the unblock key body, the main part of key body cooperation straight flute shaping, the tip of main part be provided with the cooperation chute shaping and can insert the key piece in this chute, the outside of this key piece cooperation the marble subassembly be provided with the eyelet that enables this marble subassembly and be in the unblock state.

The key of this scheme is designed to above-mentioned theftproof lock that has the marble subassembly, and the main part of the key body corresponds the straight flute, and the key piece of the key body corresponds the chute, and wherein the eyelet of key piece corresponds the arrangement mode of marble subassembly and designs, can only unblock the marble subassembly rather than the looks adaptation.

The key comprises a key handle and a key body for unlocking, wherein the main body part of the key body is matched with the straight groove for forming, and the surface of the main body part is matched with the locking plate for forming a groove; the end of the main body part is provided with a key piece which is matched with the chute to be formed and can be inserted into the chute, and the outer side of the key piece is provided with a eyelet which is matched with the marble component and can enable the marble component to be in an unlocking state.

The key of this scheme is designed to above-mentioned theftproof lock with marble subassembly and locking plate, and the main part of the key body corresponds the straight flute, and the key piece of the key body corresponds the chute, and wherein, the aperture of key piece corresponds the arrangement mode of marble subassembly and designs, can only unlock the marble subassembly rather than looks adaptation, and the slot of main part corresponds the locking plate and designs, only can be used for the locking plate of lock release adaptation, and when the key inserts correctly, the slot can drive the locking plate to remove to the unblock state, and the aperture can unblock marble subassembly.

Drawings

FIG. 1 is an exploded view of the anti-theft lock of example 1 (the connecting piece is not shown in this view);

FIG. 2 is an enlarged view of the cylinder housing and locking plate assembly of FIG. 1;

FIG. 3 is a schematic view of the structure of the anti-theft lock of embodiment 1;

FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;

FIG. 5 is a schematic structural view of a locking piece of example 1;

FIG. 6 is a schematic structural view of the key of embodiment 1, wherein the key blade is in a closed state (only two key blades are shown in this figure);

FIG. 7 is a schematic view of the structure of the key of embodiment 1, wherein the key blade is in an open state (only two key blades are shown in this figure);

FIG. 8 is a configuration diagram showing the external shape of a key according to embodiment 1;

FIG. 9 is a view in the B direction of FIG. 8;

FIG. 10 is a view in the direction C of FIG. 8;

FIG. 11 is a schematic diagram of the key of example 1 when unlocking the anti-theft lock;

FIG. 12 is a schematic view of the anti-theft lock of embodiment 1 in a locked state;

fig. 13 is a configuration diagram of the cylinder housing and the guide of the antitheft lock of embodiment 2;

FIG. 14 is a diagram showing the outline configuration of a key in embodiment 2;

fig. 15 is a bottom view of the guide device in embodiment 2;

marked in the figure as: 1-lock body, 2-lock cylinder, 11-boss structure, 12-lock plate accommodating cavity, 13-marble groove B, 21-lock cylinder shell, 22-guiding device, 23-marble component, 24-straight groove, 25-chute, 26-elastic component, 27-sealing end, 28-connecting piece, 29-lock plate, 30-lock plate spring, 211-front section lock cylinder shell, 212-rear section lock cylinder shell, 221-inclined plane B, 222-second axial through hole, 223-lack groove, 231-upper marble, 232-lower marble, 233-marble spring, 261-connecting screw, 262-spring, 271-first axial through hole, 291-protrusion, 2111-lock plate groove, 2112-lock plate spring groove, 2121-inclined plane a, 2122-threaded hole, 2123-marble groove a; 3-handle, 4-key body, 5-return device, 41-key body main part, 42-key body key piece, 51-return pole, 52-return spring, 53-return piston, 54-return end, 411-slot, 421-eyelet, 422-straight recess, 423-drainage chamfer, H1-lock plate holding cavity's height, H2-lock plate's height.

Detailed Description

The present invention will be described in further detail with reference to specific examples, but embodiments of the present invention are not limited thereto.

The anti-theft lock comprises a lock body 1 and a lock cylinder 2 arranged in the lock body 1, wherein the lock cylinder 2 has a locking state and an unlocking state relative to the lock body 1, and the lock cylinder 2 can rotate relative to the lock body when being in the unlocking state. The lock core 2 is internally provided with a key slot for inserting a key, the key slot comprises a front section and a rear section which are communicated, wherein the key slot of the front section is a straight slot 24, the key slot of the rear section is a chute 25, and an included angle between the chute 25 and the straight slot 24 is an obtuse angle. In addition, structures or components capable of locking or unlocking the lock cylinder 2 are arranged at the straight groove 24 and the inclined groove 25 of the anti-theft lock.

The invention also designs a key matched with the anti-theft lock for use, the key comprises a key handle 3 and a key body 4 for unlocking, a main body part 41 of the key body 4 is matched with a straight groove 24 of the anti-theft lock for forming, and the end part of the main body part 41 is provided with a key sheet 42 matched with a chute 25 of the anti-theft lock for forming and capable of being inserted into the chute 25.

The invention is based on the above described scheme by way of example only:

example 1:

as shown in fig. 1 to 5, the anti-theft lock of the present embodiment, the lock cylinder 2 includes a cylinder housing 21, a guide 22, and a seal head 27.

The lock core shell 21 comprises a front section and a rear section, the straight groove 24 is positioned in the front section lock core shell 211, four inclined planes A2121 are arranged in the rear section lock core shell 212, and as shown in fig. 1 and 2, the four inclined planes A2121 are distributed in a cross shape;

the outer surface of the guiding device 22 is provided with four protruding inclined planes B221, and the inclined planes B221 are matched with the inclined planes A2121 and are also distributed in a cross shape. Thereby, four of said inclined grooves 25 are formed between the four inclined surfaces 2121, 221, wherein the two opposing inclined grooves 25 are V-shaped;

in this embodiment, the parts capable of locking or unlocking the lock cylinder 2 are disposed at the inclined groove 25 are marble assemblies 23, the marble assemblies 23 are four groups, and are respectively installed corresponding to the four inclined grooves 25, and each group of marble assemblies 23 is installed in the marble groove a 2123 of the rear lock cylinder shell 212 and the marble groove B13 of the lock body 1, and has two locking and unlocking states, and when in the locking state, the lock cylinder shell 21 cannot rotate relative to the lock body 1. Specifically, in this embodiment, each set of the marble assemblies 23 includes five upper marbles 231, five lower marbles 232 and five marble springs 233, and the marbles in each set of the marble assemblies 23 may be arranged in various manners, i.e. the intervals and positions of the marbles may be arranged at will; the locking state of the marble assembly is in two cases, one is that when a key is not inserted (the marble spring 233 is in a natural state), the lower marble 232 is clamped between the rear-stage lock cylinder shell 212 and the lock body 1, as shown in fig. 12, so that the rotation of the lock cylinder 2 is clamped, and the other is that when the eyelet of the inserted key is not matched with the arrangement mode of the marble, the marble 231 is propped up on the rear of the key to be positioned between the rear-stage lock cylinder shell 212 and the lock body 1, and the rotation of the lock cylinder 2 is clamped; as shown in fig. 11, in the unlocked state of the marble assembly, when the hole into which the key is inserted is matched with the arrangement of the marble, under the action of the hole, the upper marble 232 and the lower marble 233 are retracted and then are just positioned in the rear-stage cylinder housing 212 and the lock body 1, respectively, and at this time, the parting line of the upper and lower marble is flush with the parting line of the rear-stage cylinder housing 212 and the lock body 1, and the rear-stage cylinder housing 212 is unlocked and can just rotate along the parting line of the upper and lower marble.

The sealing end 27 is used for sealing the internal components of the lock cylinder 2, is of a concave structure, is arranged on the back surface of the guide device 22, and has an end surface in surface contact with the end surface of the lock cylinder shell 212, so that the guide device 22 is positioned in a groove of the concave structure. The guide device 22 is further provided with an elastic component 26, the elastic component 26 comprises a connecting screw 261 and a spring 262, the connecting screw 261 sequentially penetrates through a first axial through hole 271 on the sealing end head 27 and a second axial through hole 222 on the guide device 22 and then is fixed in a threaded hole 2122 on the rear lock cylinder shell 212, the aperture of the second axial through hole 222 is slightly larger than the outer diameter of the connecting screw 261, the spring 262 is sleeved outside the connecting screw 261 and is installed on the step surface of the second axial through hole 222, one end of the spring is tightly propped against the guide device 22 in a compressed state, and the other end of the spring is tightly propped against the sealing end head 27. When the key is inserted into the chute 25, the guide device 22 is pushed forward by the key, so that the guide device 22 is retracted along the axial direction of the connecting bolt 261, the width of the chute 25 is widened, the key is convenient to enter, when the eyelet of the key is matched with the arrangement mode of the marble, after the key is completely inserted, the upper marble 231 is fully aligned with the eyelet of the key, at the moment, the inclined plane B221 of the guide device 22 can push against one side surface of the key under the action of the elastic restoring force of the spring 262, so that the eyelet on the other side surface of the key pushes the upper marble 231, and the marble assembly 23 is just in an unlocking state.

In addition, the component capable of locking or unlocking the lock cylinder 2, which is arranged at the straight slot 24, is a lock plate assembly, the embodiment comprises four groups of lock plate assemblies, each group of lock plate assemblies comprises three lock plates 29 and three lock plate springs 30, the lock plates 29 are in a frame structure, a slot for inserting a key is arranged in the middle, two opposite sides of the slot are provided with protrusions 291 which are used for being linked with the groove of the key, correspondingly, the lock plate housing 211 of the front section is provided with a lock plate slot 2111 for radially moving the lock plate 29, one end of each lock plate spring 30 is arranged on the lock plate 29, the other end of each lock plate spring 30 is arranged on the lock plate spring slot 2112 beside the lock plate slot 2111, and meanwhile, the lock body 1 at the corresponding position of the lock plate assembly is provided with a lock plate accommodating cavity 12; when the lock piece 29 is in a natural state (when a key is not inserted), the lock piece 29 is distributed in a staggered manner in the lock piece groove 2111, the lock piece 29 protrudes from two sides of the lock piece groove 2111 into the lock piece accommodating cavity 12 respectively, the height H1 of the lock piece accommodating cavity 12 is slightly larger than the height H2 of the lock piece 29 (as shown in fig. 4 and 5), the rotation of the lock piece 29 around the shaft can be limited after the lock piece 29 enters the accommodating cavity, the rotation of the lock piece 21 relative to the lock body 1 is limited, and only when a groove for inserting the key is matched with a protrusion 291 on the lock piece 29, the groove key can drive all the lock pieces 29 to move into the lock piece groove 2111 and two sides of the groove key are not protruded outwards, and at the moment, the front lock piece shell 211 can rotate relative to the lock body 1.

In order to enable the parts of the lock cylinder 2 to rotate relative to the lock body 1 as a whole, a connecting piece 28 with an L-shaped section is fixed on the sealing end 27, and the connecting piece 28 is fastened on the boss structure 11 on the outer wall of the lock body 1 after being fixed, and the sealing end 27 is abutted against the rear lock cylinder shell 212 to be in surface contact with the end surface of the rear lock cylinder shell 212, so that the connecting piece 28 can limit the axial movement of the parts of the lock cylinder through the boss structure 11 after being pulled together as a whole, but the connecting piece 28 does not limit the rotation of the lock cylinder 2 relative to the lock body 1.

As shown in fig. 6 to 10, in the key of this embodiment, a groove 411 is formed on the surface of the main body 41 and is matched with a protrusion 291 on the lock piece 29 of the anti-theft lock, when the key is inserted into the straight groove 24 of the anti-theft lock, the groove 411 can drive each lock piece 29 to move into the lock piece groove 2111 and not protrude outwards, so as to unlock the front lock core shell 211; the number of key pieces 42 provided at the end of the main body portion 41 is four, and the outer side of the key pieces 42 is provided with a grommet 421 which enables the marble assembly 23 to be in an unlocked state, corresponding to the arrangement of the above-described marbles.

Specifically, four key blades 42 are each hinged to an end of the key body portion 41; a return device 5 is further arranged in the main body portion 41 of the key, the return device is used for automatically resetting the key sheets 42 (the four key sheets are in a close state), the return device 5 comprises a return rod 51, a return spring 52, a return piston 53 and a return end head 54, the return rod 51 is arranged in the main body portion 41, the return end head 54 is fixed on the outer end head of the return rod 51 and is positioned at the root part among the four key sheets 42, the return piston 53 is fixed on the inner end head of the return rod 51, the return spring 52 is sleeved on the return rod 51, one end of the return spring is tightly propped against the return piston 53, and the other end of the return spring is tightly propped against the end face in the main body portion 41. Thus, when the key is not in use, as shown in fig. 6, the return lever 51 is retracted by the return spring 52, the return end 54 brings the four key pieces 42 into the closed state, and the closed key pieces 42 are flush with the main body portion 41 so as to receive or store the key; when a key is inserted into the chute 25, as shown in fig. 7 and 11, under the action of the inclined plane B221 of the deflector 22, the four key sheets 42 are opened to enter the four chute 25 respectively, the return rod 51 is extended, the return end 54 is lifted up by the key sheets 42, and after the key is taken out, the return rod 51 is retracted again, so that the key sheets 42 are in a folded state.

With respect to the anti-theft lock and the key of the present embodiment, it should be noted that, since the key piece 42 is first inserted into the straight slot 24, and the locking piece 29 is provided at the straight slot 24, and the protrusion 291 is provided on the locking piece 29, in order to prevent the protrusion 291 from affecting the insertion of the key piece 42, in cooperation with the protrusions 291 on opposite sides of the locking piece 29, two corresponding key pieces 42 are provided with the straight grooves 422 in communication with the grooves 411 of the main body portion 41, and the front ends of the straight grooves 422 are provided with the drainage chamfer 423, so that when the key piece 42 is inserted into the straight slot 24, the drainage chamfer 423 will first introduce the protrusion 291 of the locking piece 29 into the straight groove 422, and then when the key is continuously inserted, the protrusion 291 can move into the grooves 411 of the main body portion 41 along the straight groove 422, thereby ensuring that the key piece 42 can be smoothly inserted into the straight slot without being affected by the protrusions 291 by designing the straight groove 422. After the protrusion 291 enters the groove 411, the key is inserted continuously, the key piece 42 is separated along the chute 24, meanwhile, the groove 411 can drive the locking plate 29 to move, finally, the groove 411 unlocks the locking plate component, the eyelet 421 unlocks the marble component 23, unlocking of the straight groove 24 and the chute 25 is completed respectively, so that the whole lock cylinder shell 21 is unlocked, then, the handle 3 of the key is rotated again, the key piece 42 drives the lock cylinder shell 21 and the guide device 22 to rotate together, the lock cylinder shell 21 is connected with the sealing end 27 into a whole through the connecting screw 261, the sealing end 27 rotates together, and finally, under the action of the connecting piece 28, the parts of the lock cylinder 2 rotate as a whole along with the rotation of the key, so that unlocking of the anti-theft lock is completed.

It should be noted that the drawing of this embodiment does not show the pick of the anti-theft lock, and the pick may be disposed on the seal head 27 or at other reasonable positions during manufacturing, so as to be guaranteed to rotate together with the lock cylinder 2.

Example 2:

the embodiment is substantially the same as the technical solution of embodiment 1, and the main difference is that the number of the anti-theft lock chute is two.

Based on the two inclined grooves, the lock cylinder and the key of the embodiment 1 are changed as follows:

regarding the lock cylinder, the rear-stage cylinder housing 212 has two inclined surfaces a 2121 in the interior thereof, and as shown in fig. 13, the two inclined surfaces a 2121 are distributed in a straight line; correspondingly, the number of the convex inclined planes B221 on the outer surface of the guide device 22 is two, and the convex inclined planes B221 are also distributed in a straight line; thereby, two said inclined grooves 25 are formed between the two inclined surfaces 2121, 221, and the two inclined grooves 25 are V-shaped; of course, the number of the marble assemblies 23 is two, and two corresponding chute 25 are respectively arranged.

Regarding the key, in order to play a role of protecting the return device, the number of the key sheets 42 is still four, and after the four key sheets 42 are folded, the key sheets not only play a role of protecting the return device, but also have attractive appearance; wherein, a pair of key pieces 42 for unlocking the marble assembly 23 are hinged to the main body 41, and another pair of key pieces 42 may be hinged to the main body 41 or fixedly connected to the main body 41, or integrally formed with the main body 41, as shown in fig. 14, the embodiment is exemplified as an integrally formed structure; of course, the key blade 42 at the front end of the groove 411 of the main body 41 is also provided with a straight groove 422 and a drainage chamfer 423, which function in the same manner as in embodiment 1.

In the above, since the number of the key sheets is four and the number of the inclined slots is two, when the key is inserted, two key sheets are not turned, so that a hole or a notch 223 needs to be formed in the middle of the guiding device 22 for the two key sheets to pass through to avoid blocking the insertion of the key, as shown in fig. 15.

The number of the inclined grooves is not limited to four or two, and the four or two inclined grooves are only two preferred embodiments listed in the above embodiment, and of course, the inclined grooves may be one, three or more.

The two embodiments are the preferred schemes designed based on the most basic scheme of the invention (the straight groove and the inclined groove are simultaneously provided), the locking plate component and the marble component are respectively arranged at the straight groove and the inclined groove, the unlocking is realized by simultaneously unlocking the locking plate component and the marble component, so that the locking device has extremely strong anti-theft performance, a professional unlocking staff adopts the current tool to unlock the locking plate of the straight groove, the marble component of the inclined groove is difficult to unlock after the direction of the locking plate of the straight groove is changed in the key groove track, and moreover, in the case of a plurality of inclined grooves, the marble component in each inclined groove is also required to be simultaneously unlocked, which is impossible for the current technicians and tools. Therefore, the anti-theft lock has excellent anti-theft performance and good market prospect, provides an anti-theft lock with extremely high safety performance for the current lockset market, and is superior to the current C-level lock on the market.

Claims (7)

1. The utility model provides an anti-theft lock, includes lock body (1) and is located lock core (2) in this lock body (1), lock core (2) in be provided with the key groove that supplies key male, its characterized in that: the key slot comprises a front section and a rear section, wherein the key slot of the front section is a straight slot (24), the key slot of the rear section is a chute (25), an included angle between the chute (25) and the straight slot (24) is smaller than 180 degrees, and the lock core (2) comprises a lock core shell (21), a guide device (22), a marble component (23) and a sealing end (27) arranged on the back of the guide device (22);

the lock cylinder shell (21) comprises a front section and a rear section, the straight groove (24) is positioned in the front section lock cylinder shell (211), and the rear section lock cylinder shell (212) is provided with an inclined plane A (2121);

the guide device (22) is provided with a slope B (221), the slope B (221) is matched with the slope A (2121), the chute (25) is formed between the two slopes (2121 and 221), the guide device (22) is provided with an elastic component (26), the elastic restoring force of the elastic component (26) drives the guide device (22) to elastically push against one side of the slope A (2121), the elastic component (26) comprises a connecting screw (261) and a spring (262), the connecting screw (261) sequentially passes through a first axial through hole (271) on the sealing end head (27) and a second axial through hole (222) on the guide device (22) and then is fixed in a threaded hole (2122) on the rear lock cylinder shell (212), the aperture of the second axial through hole (222) is larger than the outer diameter of the connecting screw (261), the spring (262) is sleeved outside the connecting screw (261) and is arranged in the second axial through hole (222), one end of the connecting screw is pushed against the guide device (22), and the other end of the connecting screw is pushed against the sealing end head (27) in a compressed state;

the ball assembly (23) is arranged in the rear lock cylinder shell (212) and the lock body (1) corresponding to the chute (25) and is used for limiting whether the lock cylinder shell (21) can rotate relative to the lock body (1) or not, and has two states of locking and unlocking;

after the matched key is inserted into the chute (25), the inclined plane B (221) of the guide device (22) can push against one side surface of the key, so that the other side surface of the key pushes the marble component (23) to be in an unlocking state.

2. The anti-theft lock according to claim 1, characterized in that: the lock cylinder is characterized by further comprising a connecting sheet (28) used for limiting, wherein the end face of the sealing end head (27) is in surface contact with the end face of the lock cylinder shell (21), one end of the connecting sheet (28) is fixed on the sealing end head (27), and the other end of the connecting sheet is buckled on a boss structure (11) on the outer wall of the lock body (1) and used for limiting the axial movement of the lock cylinder (2).

3. An anti-theft lock according to claim 1 or 2, characterized in that: a radial lock plate groove (2111) is provided in a straight groove (24) of the key groove, and a lock plate (29) which cooperates with the key is slidably provided in the lock plate groove (2111).

4. An anti-theft lock according to claim 1 or 2, characterized in that: the number of the chute (25) is two or four, and the chute is symmetrically distributed.

5. A key for use with an anti-theft lock according to claim 1, the key comprising a key handle (3) and a key body (4) for unlocking, characterized in that: the main body (41) of the key body (4) is matched with the straight groove (24) to be molded, and the end part of the main body (41) is provided with a key sheet (42) matched with the chute (25) of claim 1 to be molded and inserted into the chute (25).

6. A key for use with an anti-theft lock according to claim 1, the key comprising a key handle (3) and a key body (4) for unlocking, characterized in that: the main body part (41) of the key body (4) is matched with the straight groove (24) of claim 2 to form, the end part of the main body part (41) is provided with a key sheet (42) matched with the chute (25) to form and capable of being inserted into the chute (25), and the outer side of the key sheet (42) is matched with the marble assembly (23) to be provided with a eyelet (421) capable of enabling the marble assembly (23) to be in an unlocking state.

7. A key for use with an anti-theft lock according to claim 3, the key comprising a key handle (3) and a key body (4) for unlocking, characterized in that: the main body part (41) of the key body (4) is matched with the straight groove (24) for forming, and a groove (411) is formed on the surface of the main body part (41) matched with the locking plate (29); the end of the main body part (41) is provided with a key piece (42) which is matched with the chute (25) to be molded and can be inserted into the chute (25), and the outer side of the key piece (42) is matched with the marble assembly (23) to be provided with an eyelet (421) which can enable the marble assembly (23) to be in an unlocking state.