CN108798244B

CN108798244B - Antitheft lock

Info

Publication number: CN108798244B
Application number: CN201710430297.9A
Authority: CN
Inventors: 谭召亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-06-09
Filing date: 2017-06-09
Publication date: 2023-11-10
Anticipated expiration: 2037-06-09
Also published as: CN108798244A

Abstract

The invention discloses an anti-theft lock, which comprises a lock body and a lock cylinder positioned in the lock body, wherein a key slot for inserting a key is arranged in the lock cylinder, the key slot comprises a straight slot and at least one chute, the chute is communicated with the straight slot and is obliquely arranged relative to the straight slot, a first locking component and a second locking component are respectively arranged in the chute and the straight slot, and the first locking component and the second locking component are used for limiting whether the lock cylinder can rotate relative to the lock body or not and have two locking and unlocking states. The key slot has the characteristic of turning, when the key is unlocked, the second locking part at the straight slot is required to be unlocked after the key is inserted into the straight slot, then the key is turned into the chute and the first locking part at the chute is unlocked, so that the whole lock cylinder can be unlocked, the turning in the key slot is difficult for a technical unlocking tool, and the first locking part at the chute is required to be unlocked after the turning is difficult.

Description

Antitheft lock

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 A-level lock generally comprises a traditional straight lock, a cross lock, a crescent lock and a lock with a row of marble structures in most lock cylinders, and has poor anti-theft property and extremely high mutual unlocking rate, and the technical unlocking time is generally about a few seconds to two minutes. 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: the utility model provides an anti-theft lock, includes the lock body and is located the lock core in this lock body, the lock core in be provided with the key groove that supplies key to insert, the key groove include straight flute and at least one chute, chute and straight flute communicate with each other and set up for straight flute slope chute and straight flute respectively dispose first locking part and second locking part, first locking part and second locking part all be used for limiting the lock core and can rotate for the lock body, have two states of locking and unblock.

Thus, the lock cylinder can be unlocked only when both the first locking member and the second locking member are in the unlocked state, and the lock cylinder can be rotated relative to the lock body.

The anti-theft lock has the beneficial effects that: at present, key grooves of lock cylinders in the market are straight grooves, technical unlocking tools can enter and toggle unlocking, and only the problem of long unlocking time is solved; in the invention, the key slot of the lock core is formed by the straight slot and the inclined slot, namely the key slot has the characteristic of turning, when the lock is unlocked, the second locking part at the straight slot needs to be unlocked firstly after the key is inserted into the straight slot, then the key is turned into the inclined slot and the first locking part at the inclined slot is unlocked, so that the lock core is unlocked as a whole, the turning is difficult to realize in the key slot for the unlocking tool of the prior art, and the first locking part at the inclined slot needs to be unlocked (the premise is that the first locking part is unlocked) after the turning is difficult, so that the anti-theft lock has extremely strong anti-theft performance.

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 first locking component is a marble component which 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 has two locking and unlocking states;

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 the further scheme, because the guide device is elastically propped against the inclined plane A, when a key is inserted into the inclined groove, the guide device is retracted, so that the inclined groove is opened, the insertion of the key is facilitated, the guide device can prop against the key after the key is inserted, the key is driven to prop against the marble component, and at the moment, if the eyelet of the key is matched with the arrangement mode of the marble component, the marble component is in an unlocking state.

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 in a compressed state, one end of the spring is propped against the guide device, and the other end of the spring is 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 increase the chute and reduce the resistance of the key when the key is inserted, and the inserted spring can push the guiding device to elastically push against the key, so that the spring can push against and unlock the marble assembly. 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; in the above description, the axial directions of the first axial through hole and the second axial through hole refer to directions parallel to the straight groove axis.

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 head is in surface contact with the end face of the lock cylinder shell, the sealing end head seals the guide device inside, so that the sealing end head, 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, the second locking component is a locking plate, a radial locking plate groove is arranged at the straight groove in cooperation with the locking plate, and the locking plate is arranged in the locking plate groove in a sliding manner. The locking plate groove and the locking plate are commonly adopted parts of the existing blade lock, and the locking plate groove and the locking plate are designed into the straight groove, so that the difficulty of unlocking the straight groove is increased, and the anti-theft performance of the lock is improved; the lock plate can be linked with the matched groove on 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, when the matched key is inserted, the groove can drive the lock plate to move and finally be in an unlocking state, and the lock cylinder shell can rotate relative to the lock body. 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 is also required to be simultaneously stirred to unlock so as to unlock the lock cylinder, and the unlocking of the tool or the thief is almost impossible to complete.

Further, the chute is communicated with the middle part of the straight chute.

The invention also provides another anti-theft lock, which comprises a lock body and a lock cylinder positioned in the lock body, wherein a key slot for inserting a key is arranged in the lock cylinder, the key slot comprises a straight slot and at least one chute (25), the chute is communicated with the straight slot and is obliquely arranged relative to the straight slot, a first locking part is arranged at the chute, and the first locking part is used for limiting whether the lock cylinder can rotate relative to the lock body and has two states of locking and unlocking.

The anti-theft lock is provided with the first locking part at the chute, and the technical unlocking tool is difficult to enter the chute and unlock the first locking part after turning in the key slot, so that the anti-theft lock has extremely high anti-theft performance.

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 cylinder 2 is internally provided with a key slot for inserting a key, the key slot comprises a straight slot 24 and at least one chute 25, the chute 25 is communicated with the straight slot 24 and is obliquely arranged relative to the straight slot 24, the chute 25 and the straight slot 24 are respectively provided with a first locking component and a second locking component, and the first locking component and the second locking component are used for limiting whether the lock cylinder 2 can rotate relative to the lock body 1 or not and have two locking and unlocking states.

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 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 is arranged on the main body part 41.

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, a ball assembly 23, 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 marble assemblies 23 are configured at the inclined grooves 25 as the first locking members, the marble assemblies 23 are in 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-stage cylinder housing 212 and the marble groove B13 of the lock body 1, and has two states of locking and unlocking, and the cylinder housing 21 cannot rotate relative to the lock body 1 when in the locked state. 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 rear 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, in this embodiment, the lock plate 29 is configured at the straight slot 24 as the second locking component, in this embodiment, four sets of lock plate assemblies are adopted, each set of lock plate assemblies includes three lock plates 29 and three lock plate springs 30, the lock plate 29 is in a frame structure, the middle is provided with a slot for inserting a key, two opposite sides of the slot are provided with protrusions 291 for being linked with the slot of the key, correspondingly, the lock plate slot 2111 for radially moving the lock plate 29 is provided on the front lock plate shell 211, one end of the lock plate spring 30 is installed on the lock plate 29, the other end is installed 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 the 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, at this time, the return end 54 is lifted up by the key sheet 42, the return rod 51 is extended, and after the key is taken out, the return rod 51 is retracted again, so that the key sheet 42 is in a retracted 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 a2121 in the interior thereof, and as shown in fig. 13, the two inclined surfaces a2121 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 the four key sheets 42 can play a role of protecting the return device after being folded, and the appearance is also attractive; 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.

It should be noted that the number of the chute is not limited to four or two, and four or two chute are only two preferred embodiments listed in the foregoing embodiments, and of course, the number of the chute may be one, three or more, which is not described herein.

In the above two embodiments, the second locking component is a locking piece, but it should be noted that, the second locking component may also be a marble assembly or other components with the function of locking the lock core; similarly, other components having lock core locking functions may be used as the first locking component. In the above two embodiments, the chute is connected to the end of the straight groove, and of course, the chute may alternatively be connected to the middle of the straight groove, and the specific structure will not be described herein.

In the above two embodiments, the locking plate component and the marble component are respectively configured in the straight groove and the chute, and the locking plate component and the marble component can be unlocked simultaneously when unlocking, so that the lock has extremely strong anti-theft performance, and even if a professional unlocking personnel adopts the current tool to unlock the locking plate of the straight groove, the marble component of the chute is difficult to unlock after the direction of the locking plate in the track of the key groove, and moreover, under the condition of a plurality of chutes, the marble component in each chute is also required to be unlocked simultaneously, 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

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 straight slot (24) and at least one chute (25), the chute (25) is communicated with the straight slot (24) and is obliquely arranged relative to the straight slot (24), the chute (25) and the straight slot (24) are respectively provided with a first locking component and a second locking component, and the first locking component and the second locking component are used for limiting whether the lock cylinder (2) can rotate relative to the lock body (1); the lock cylinder (2) comprises a lock cylinder shell (21), a guide device (22), a marble component (23) and a sealing end head (27) arranged on the back of the guide device (22);

the lock cylinder shell (21) comprises a front section lock cylinder shell (211) and a rear section lock cylinder shell (212), 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 guiding device (22) is provided with a bevel B (221), the bevel B (221) is matched with the bevel A (2121), and the chute (25) is formed between the two bevels (2121, 221);

the first locking component is a marble component (23), the marble component (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), and the first locking component 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; the guide device (22) is 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) in the sealing end head (27) and a second axial through hole (222) in the guide device (22) and then is fixed in a threaded hole (2122) in 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), one end of the spring (262) is sleeved on the connecting screw (261) and is in a compressed state, the other end of the spring is propped against the sealing end head (27), and the elastic restoring force of the elastic component (26) drives the guide device (22) to elastically prop against one side of the inclined surface A (2121);

the second locking component is a locking plate (29), a radial locking plate groove (2111) is formed in the straight groove (24) in cooperation with the locking plate (29), the locking plate (29) is slidably arranged in the locking plate groove (2111), and the second locking component is in a locking state and an unlocking state;

the number of the chute (25) is two or four, and the chute is symmetrically distributed.

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. The anti-theft lock according to claim 1, characterized in that: the chute (25) is communicated with the middle part of the straight groove (24).

4. 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 straight slot (24) and at least one chute (25), wherein the chute (25) is communicated with the straight slot (24) and is obliquely arranged relative to the straight slot (24), a first locking part is arranged at the chute (25), and the first locking part is used for limiting whether the lock cylinder (2) can rotate relative to the lock body (1) or not and has two locking and unlocking states; the lock cylinder (2) comprises a lock cylinder shell (21), a guide device (22), a marble component (23) and a sealing end head (27) arranged on the back of the guide device (22);

the first locking component is a marble component (23), and the marble component (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);