CN108798264B - Key and automatic reset structure - Google Patents

Abstract

The invention relates to the field of keys and discloses a key, which comprises a key body for unlocking a lock cylinder, wherein the key body comprises a main body part and at least one key sheet; the outer surface of the key sheet is provided with a eyelet for unlocking the ball component in the lock cylinder, the bottom of the key sheet is hinged with the main body part, and the hinged key sheet can be outwards inclined and rotated relative to the main body part based on a hinge shaft; and a reset device is arranged at the bottom of the key sheet, and when the key sheet rotates outwards in an inclined way, the reset device can drive the key sheet to return to a position where the outer wall of the key sheet is coplanar with the outer wall of the main body part. The key is used for being matched with an anti-theft lock, a turning key slot is formed in the anti-theft lock, and the key can be inserted into the key slot and unlocked; because the key slot has the characteristic of turning, the unlocking tool is difficult to turn in the slot, and even if the key slot turns backwards, the lock cylinder at the unlocking chute cannot be stirred, so that the so-called technical unlocking can be stopped.

Description

Key and automatic reset structure

Technical Field

The present invention relates to the field of keys.

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 key is used for being matched with an anti-theft lock, the inside of the anti-theft lock is provided with a turning key groove, the key is used for being inserted into the turning key groove and unlocking the turning key groove, and an unlocking tool cannot turn in the groove and extend into the innermost end of the groove to unlock the turning key groove due to the turning characteristic of the key groove, so that so-called technical unlocking is avoided, and the anti-theft performance of the lock is greatly improved.

The technical scheme adopted for solving the technical problems is as follows: there is provided a key comprising a key body for unlocking a lock cylinder, said key body comprising a main body portion and at least one key blade;

the outer surface of the key sheet is provided with a eyelet for unlocking the ball component in the lock cylinder, the bottom of the key sheet is hinged with the main body part, and the hinged key sheet can be outwards inclined and rotated relative to the main body part based on a hinge shaft; the bottom of the key piece is also provided with a reset device, and when the key piece rotates outwards in an inclined way, the reset device can drive the key piece to return to a position where the outer wall of the key piece is coplanar with the outer wall of the main body part;

the reset device is arranged in the key sheet in cooperation with the hinge shaft and comprises a reset spring and a steel ball; the return spring is in a compressed state, one end of the return spring is propped against the force surface in the key sheet, and the other end of the return spring is propped against the steel ball; corresponding to the steel ball, a round hole with the diameter slightly smaller than the outer diameter of the steel ball is formed in the wall surface of the key sheet, a part of spherical surface of the steel ball protrudes from the round hole and is exposed outside under the elastic action of the return spring, the exposed spherical surface of the steel ball is matched, and a spherical concave surface for accommodating the exposed spherical surface is arranged on the main body part; when the key sheet is positioned at the position where the outer wall of the key sheet is coplanar with the outer wall of the main body part, the spherical concave surface can ensure that the exposed spherical surface area of the steel ball is the maximum value; when the key piece rotates in an inclined way, the steel balls are limited by the spherical concave surfaces to retract, and when the key piece rotates to the maximum inclination angle, the steel balls retract to the position where the exposed spherical surface area is the minimum value.

Further, the return spring is arranged in parallel relative to the hinge shaft.

Further, the return spring is vertically arranged relative to the hinge shaft.

Further, the number of the key sheets is four, the four key sheets are connected to the end part of the main body part, and the four key sheets enclose a structure with a square section; one group of oppositely arranged key sheets is provided with return springs which are parallel to the hinge shaft, and the other group of oppositely arranged key sheets is provided with return springs which are perpendicular to the hinge shaft.

Further, the front end of the key sheet is provided with an inclined guide surface.

Further, the outer surface of the main body part is provided with a groove for unlocking the inner locking piece of the lock cylinder.

Further, the number of holes on a single key blade is three to eight.

Based on the same thought, the invention also provides an automatic resetting structure, which comprises a fixed part and a movable part, wherein the bottom of the movable part is hinged on the fixed part, the hinged movable part can rotate obliquely to one side relative to the fixed part on the basis of a hinge shaft, and a resetting device is arranged at the bottom of the movable part, and can drive the movable part to return to the position of the movable part in the same axial direction as the fixed part when the movable part rotates obliquely to one side;

the reset device is arranged in the movable part in cooperation with the hinge shaft and comprises a return spring and a steel ball; the return spring is in a compressed state, one end of the return spring is propped against the acting surface in the movable part, and the other end of the return spring is propped against the steel ball; corresponding to the steel ball, a round hole with the diameter slightly smaller than the outer diameter of the steel ball is formed in the wall surface of the movable part, a part of spherical surface of the steel ball protrudes from the round hole and is exposed outside under the elastic action of the return spring, the exposed spherical surface of the steel ball is matched, and a spherical concave surface for accommodating the exposed spherical surface is arranged on the fixed part; when the movable part and the fixed part are coaxial, the spherical concave surface can ensure that the exposed spherical surface area of the steel ball is the maximum value; when the movable part rotates obliquely, the steel balls are limited by the spherical concave surfaces to shrink inwards, and when the movable part rotates to the maximum inclination angle, the steel balls shrink inwards to the position where the exposed spherical surface area is the minimum value.

Further, the return spring is arranged in parallel relative to the hinge shaft.

Further, the return spring is vertically arranged relative to the hinge shaft.

The term "spring" as used herein means a spring that is disposed parallel or perpendicular to a hinge axis, and the term "spring center axis" means a spring that is disposed parallel or perpendicular to the hinge axis.

The beneficial effects of the invention are as follows: the key is used for being matched with an anti-theft lock, the inside of the anti-theft lock is provided with a turning key slot, and the key can be inserted into the key slot and unlock the key slot; because the key slot has the characteristic of turning, the unlocking tool is difficult to turn in the slot, and even if the key slot turns backwards, the lock core at the chute after unlocking and turning is impossible to stir, so the so-called technical unlocking can be stopped, and the anti-theft performance of the lockset is greatly improved.

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 configuration diagram showing the external shape of a key according to embodiment 1;

FIG. 7 is a view in the B direction of FIG. 6;

FIG. 8 is a view in the direction C of FIG. 6;

FIG. 9 is an exploded view of the upper portion of FIG. 6;

FIG. 10 is a schematic view of the return spring disposed in parallel relative to the hinge shaft;

FIG. 11 is a schematic view of a return spring disposed perpendicularly with respect to a hinge axis;

FIG. 12 is a schematic diagram of the operation of the reset device when the key blade outer wall is coplanar with the body portion outer wall (this figure illustrates the return spring disposed vertically with respect to the hinge axis, and similarly disposed in parallel);

FIG. 13 is a schematic diagram of the operation of the reset device when the key blade is rotated in an inclined orientation (the figure also illustrates the return spring being disposed vertically with respect to the hinge axis, and similarly in a parallel orientation);

FIG. 14 is a schematic view of the key of example 1 unlocking the anti-theft lock;

FIG. 15 is a schematic view of the antitheft lock of embodiment 1 in the locked state;

fig. 16 is a configuration diagram of the cylinder housing and the guide of the antitheft lock of embodiment 2;

FIG. 17 is a diagram showing the outline configuration of a key in embodiment 2;

fig. 18 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, 41-key body main part, 42-key body key piece, 43-articulated shaft, 51-return spring, 52-steel ball, 411-slot, 412-extension face, 413-main part outer wall, 414-spherical concave, 421-eyelet, 422-straight recess, 423-drainage chamfer, 424-key piece outer wall, 425-round hole, 426-guide face, 521-bare sphere, H1-height of lock plate holding cavity, H2-height of lock plate.

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 key of the invention is designed based on an anti-theft lock, and the technical scheme of the anti-theft lock is as follows:

an 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. The anti-theft lock is provided with a first locking member at the chute 25, which first locking member is capable of locking or unlocking the lock cylinder 2.

The invention provides a key which can be matched with the anti-theft lock for use. The key comprises a key handle 3 and a key body 4 for unlocking a lock cylinder, the key body 4 comprises a main body part 41 and key sheets 42, the number of the key sheets 42 is at least one, the bottom of the key sheets 42 is hinged on the main body part 41 and can rotate outwards relative to the main body part 41 based on a hinge shaft 43, and a first unlocking part is arranged on the key sheets 42 and is used for unlocking a first locking part at the anti-theft lock chute 25, so that the first unlocking part of the key needs to be matched with the first locking part at the anti-theft lock chute 25 during manufacturing.

Preferably, the present invention employs the marble assembly 23 as the first locking member at the anti-theft lock chute 25, and for this marble assembly 23, a eyelet 421 is provided on the outer surface of the key blade 42 of the key as the first unlocking portion.

In order to further improve the anti-theft performance of the anti-theft lock, a second locking member is further arranged at the straight groove 24 of the anti-theft lock, and a second unlocking part for unlocking the second locking member is arranged at the main body part 41 of the key for the second locking member. Preferably, the present invention employs a locking tab assembly as the second locking member at the straight slot 24 of the anti-theft lock 25, for which a groove 411 is provided on the surface of the key body portion 41 that mates with the locking tab assembly as the second unlocking portion.

Example 1:

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

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, four inclined planes A2121 (the inclined planes A are shown in fig. 3) are arranged in the rear section lock cylinder 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;

the four marble assemblies 23 are respectively installed corresponding to the four inclined grooves 25, and each marble assembly 23 is installed in the marble groove A2123 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 the lock cylinder shell 21 cannot rotate relative to the lock body 1 when in the locking 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. 15, thereby blocking the rotation of the lock cylinder 2, and the other is that when the eyelet 421 of the inserted key is not matched with the arrangement mode of the marble, the marble 231 is propped up on the rear side 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 also blocked; as shown in fig. 14, in the unlocked state of the marble assembly, when the eyelet 421 into which the key is inserted is matched with the arrangement of the marbles, under the action of the eyelet 421, 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 marbles 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 just can rotate along the parting line of the upper and lower marbles.

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. Therefore, 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 entry of the key is facilitated, 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 to enable the marble assembly 23 to be just in the unlocking state.

In addition, this embodiment includes four sets of locking plate assemblies, each set of locking plate assemblies includes three locking plates 29 and three locking plate springs 30, the locking plate 29 is a frame-shaped structure, there is a slot for the key to insert in the middle, two opposite sides of the slot are equipped with the protrusion 291 used for interlocking with slot 411 of the key, correspondingly, there is a locking plate slot 2111 for the locking plate 29 to move radially on the front section lock core shell 211, one end of the locking plate spring 30 is installed on locking plate 29, another end is installed on locking plate spring slot 2112 beside locking plate slot 2111, meanwhile, there is a locking plate accommodating cavity 12 on the lock body 1 where the locking plate assembly corresponds; 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 mode 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 shell 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 key can drive all the lock pieces 29 to move into the lock piece groove 2111 and two sides of the lock piece groove 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. 6-11, the groove 411 on the surface of the main body 41 needs to be matched with the protrusion 291 on the lock piece 29 of the anti-theft lock to open, 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 holes 421 on the outer surface of the key blade 42 are required to be arranged corresponding to the above arrangement of the marbles, that is, the holes 421 enable the marble assembly 23 to be in the unlocked state, and in this embodiment, five holes 421 are provided on each key blade.

Specifically, the number of the key sheets 42 is four, and the four key sheets 42 enclose a structure with a square cross section; the bottom of each key piece 42 is hinged to the end of the main body 41, and the hinged key pieces 42 can tilt outwards relative to the main body 41 based on the hinge shaft 43; in order to facilitate the entry of the key blade 42 into the chute 25 of the anti-theft lock, an inclined guide surface 426 is also provided at the front end of the key blade 42. In addition, a reset device is arranged at the bottom of the key piece 42, and when the key piece 42 is rotated outwards in an inclined way, the reset device can drive the key piece 42 to return to a position that the outer wall 424 of the key piece is coplanar with the outer wall 413 of the main body part;

the reset device is arranged in the key sheet 42 in cooperation with the hinge shaft 43, and comprises a reset spring 51 and a steel ball 52; the return spring 51 is in a compressed state, one end of the return spring is propped against the force surface in the key sheet 42, and the other end of the return spring is propped against the steel ball 52; corresponding to the steel ball 52, a round hole 425 with a diameter slightly smaller than the outer diameter of the steel ball 52 is formed on the wall surface of the key piece 42, and under the elastic force of the return spring 51, part of the spherical surface of the steel ball 52 protrudes from the round hole 425 and is exposed outside; a spherical concave surface 414 for accommodating the exposed spherical surface 521 is provided on the main body 41 in cooperation with the exposed spherical surface 521 of the steel ball 52; when the key blade 42 is positioned in the position where the key blade outer wall 424 is coplanar with the main body portion outer wall 413, the spherical concave surface 414 ensures that the area of the exposed spherical surface 521 of the steel ball 52 is at a maximum, when the key blade 42 is rotated in an inclined manner, the steel ball 52 is constrained by the spherical concave surface 414 to retract, and when the key blade 42 is rotated to a maximum inclination angle, the steel ball 52 is retracted to a position where the area of the exposed spherical surface 521 is at a minimum.

In the present embodiment, one set of oppositely disposed key blades 42 has its return spring 51 disposed in parallel with respect to the hinge shaft 43, and the other set of oppositely disposed key blades 42 has its return spring 51 disposed perpendicularly with respect to the hinge shaft 43.

The working principle of the resetting device is as follows: as shown in fig. 12, when the key blade 42 is located at the position where the key blade outer wall 424 is coplanar with the main body portion outer wall 413, the elastic restoring force F of the return spring 51 will push the steel ball 52 to the bottommost end, and at this time, the area of the exposed spherical surface 521 of the steel ball is the maximum value; as shown in fig. 13, when the key blade 42 rotates obliquely, the steel balls 52 will shift, the shifted steel balls 52 will be limited by the arc surface of the spherical concave surface 414 and retract inwards, the retraction will increase the compression of the return spring 51, so that the elastic restoring force F to which the steel balls 52 are subjected will also increase, under the action of the restoring force, the return spring 51 will drive the steel balls 52 to move back to the bottommost end (i.e. the area of the exposed spherical surface 521 is the largest), and thus, the key blade 42 will return to the position where the outer wall 424 of the key blade is coplanar with the outer wall 413 of the main body portion by the power of the returning of the steel balls 52.

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 is not affected by the protrusions 291 by designing the straight groove 422, and can be smoothly inserted into the straight slot 24. After the protrusions 291 enter the grooves 411, the key is inserted continuously, the four key sheets 42 are separated along the inclined grooves 24, the grooves 411 drive the locking plate 29 to move, the locking plate 29 moves into the locking plate groove 2111 at last, two sides of the locking plate are not protruded outwards, the holes 421 of the key sheets drive all the marble assemblies 23 to move to the unlocking state, accordingly, the grooves 411 unlock the locking plate assemblies, the holes 421 unlock the marble assemblies 23, the unlocking of the straight grooves 24 and the inclined grooves 25 is completed respectively, the lock cylinder shell 21 is unlocked integrally, then the handle 3 of the key is rotated again, the key sheets 42 drive 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, therefore, the sealing end 27 rotates together, and finally under the action of the connecting sheet 28, the parts of the lock cylinder 2 rotate along with the rotation of the key to unlock the anti-theft lock.

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. 16, 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 shape; 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, as shown in fig. 17, the number of key blades 42 is two, and the bottoms of the two key blades 42 are also provided with the reset device described in embodiment 1. In order to improve the appearance integrity of the key, the main body 41 has an extension surface 412 formed in cooperation with the key blade 42, the extension surface 412 is integrally formed on the main body 41, the extension surface 412 extends from the root position of the key blade 42 to the end position of the key blade 42, and forms a square structure with the key blade 42 with four surrounding cross sections. Therefore, when the key piece 42 is folded, the surrounding structure promotes the integrity of the key, so that the key has a beautiful appearance, and the extension surface 412 has a protective effect on the key piece 42. The straight groove 422 and the drainage chamfer 423 are also formed on the extension surface 412, and function in the same manner as in embodiment 1.

In this embodiment, since the extension surface 412 is fixed, the guiding device 22 needs to reserve space for the extension surface 412 after the key is inserted, and thus a hole or slot 223 is provided in the middle of the guiding device 22 for the extension surface 412 to pass therethrough, so as to avoid blocking the insertion of the key, as shown in fig. 18.

With respect to the present invention, it should be noted that the number of the chute is not limited to four or two, and the four or two chute are only two preferred embodiments listed in the foregoing embodiments, however, the chute may also be one, three or more, and the number of the key blade may also be one, three or more. When the key blade is one, three or more, the specific structure of the key is similar to that of the above-described embodiment, and thus the embodiments are not separately enumerated for explanation.

The anti-theft lock in the above two embodiments is provided with the lock plate component and the marble component at the straight groove and the chute respectively, and the lock is unlocked by simultaneously unlocking the lock plate component and the marble component, so that the anti-theft lock has extremely strong anti-theft performance, and a professional unlocking staff adopts the current tool to unlock the lock plate of the straight groove, so that the marble component at the chute is difficult to unlock after the lock plate is turned in the track of the key groove, and 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 excellent market prospect, the key is specially configured for the anti-theft lock, and the key and the anti-theft lock provide a better scheme for the current lockset market, so that the safety performance of the lockset is greatly improved.

Example 3:

the invention also provides an automatic resetting structure based on the resetting device of the key in the embodiment 1, which comprises a fixed part and a movable part, wherein the bottom of the movable part is hinged on the fixed part, the hinged movable part can rotate obliquely to one side relative to the fixed part on the basis of a hinge shaft, the bottom of the movable part is provided with a resetting device, and when the movable part rotates obliquely to one side, the resetting device can drive the movable part to return to the position of the movable part and the fixed part in the same axial direction;

the reset device is arranged in the movable part in cooperation with the hinge shaft and comprises a return spring and a steel ball; the return spring is in a compressed state, one end of the return spring is propped against the acting surface in the movable part, and the other end of the return spring is propped against the steel ball; corresponding to the steel ball, a round hole with the diameter slightly smaller than the outer diameter of the steel ball is formed in the wall surface of the movable part, a part of spherical surface of the steel ball protrudes from the round hole and is exposed outside under the elastic action of the return spring, the exposed spherical surface of the steel ball is matched, and a spherical concave surface for accommodating the exposed spherical surface is arranged on the fixed part; when the movable part and the fixed part are coaxial, the spherical concave surface can ensure that the exposed spherical surface area of the steel ball is the maximum value; when the movable part rotates obliquely, the steel balls are limited by the spherical concave surfaces to shrink inwards, and when the movable part rotates to the maximum inclination angle, the steel balls shrink inwards to the position where the exposed spherical surface area is the minimum value.

Alternatively, the return springs may be disposed in parallel or perpendicular to the hinge shaft.

Since the automatic reset structure of this embodiment is the same as the reset device of embodiment 1 in operation, the description of the drawings is omitted here.

Claims (10)

1. Key, including the key body (4) that are used for unblock lock core, its characterized in that: the key body (4) comprises a main body part (41) and at least one key sheet (42);

the outer surface of the key piece (42) is provided with a eyelet (421) for unlocking a ball assembly in the lock cylinder, the bottom of the key piece (42) is hinged with the main body part (41), and the hinged key piece (42) can tilt outwards relative to the main body part (41) based on a hinge shaft (43); a reset device is arranged at the bottom of the key piece (42), and when the key piece (42) rotates outwards in an inclined way, the reset device can drive the key piece (42) to return to a position where the outer wall (424) of the key piece is coplanar with the outer wall (413) of the main body part;

the reset device is arranged in the key piece (42) in cooperation with the hinge shaft (43), and comprises a reset spring (51) and a steel ball (52); the return spring (51) is in a compressed state, one end of the return spring is propped against the force surface in the key sheet (42), and the other end of the return spring is propped against the steel ball (52); corresponding to the steel ball (52), a round hole (425) with the diameter slightly smaller than the outer diameter of the steel ball (52) is formed in the wall surface of the key sheet (42), and under the elastic force of the return spring (51), part of the spherical surface of the steel ball (52) protrudes from the round hole (425) and is exposed outside; a spherical concave surface (414) for accommodating the exposed spherical surface (521) is arranged on the main body part (41) in cooperation with the exposed spherical surface (521) of the steel ball (52); when the key piece (42) is positioned at the position where the outer wall (424) of the key piece is coplanar with the outer wall (413) of the main body part, the spherical concave surface (414) can ensure that the area of the exposed spherical surface (521) of the steel ball (52) is the maximum; when the key piece (42) rotates obliquely, the steel ball (52) is contracted inwards under the limit of the spherical concave surface (414), and when the key piece (42) rotates to the maximum inclination angle, the steel ball (52) is contracted inwards to the position where the area of the exposed spherical surface (521) is the minimum.

2. The key according to claim 1, wherein: the return spring (51) is arranged in parallel with respect to the hinge shaft (43).

3. The key according to claim 1, wherein: the return spring (51) is arranged vertically relative to the hinge shaft (43).

4. The key according to claim 1, wherein: the number of the key sheets (42) is four, the four key sheets (42) are connected at the end part of the main body part (41), and the four key sheets (42) enclose a structure with square cross section; one set of oppositely arranged key blades (42) is provided with return springs (51) which are arranged in parallel relative to the hinge shaft (43), and the other set of oppositely arranged key blades (42) is provided with return springs (51) which are arranged vertically relative to the hinge shaft (43).

5. The key according to any one of claims 1-4, wherein: the front end of the key blade (42) is provided with an inclined guide surface (426).

6. The key according to any one of claims 1-4, wherein: the outer surface of the main body part (41) is provided with a groove (411) for unlocking the inner locking piece of the lock cylinder.

7. The key according to any one of claims 1-4, wherein: the number of holes (421) on a single key blade (42) is three to eight.

8. Automatic reset structure, is in including fixed part and bottom hinge movable part on the fixed part, articulated movable part can be based on the articulated shaft and rotate to one side slope for the fixed part, its characterized in that: the bottom of the movable part is provided with a resetting device, and when the movable part rotates obliquely to one side, the resetting device can drive the movable part to return to the position of the movable part in the same axial direction as the fixed part;

the reset device is arranged in the movable part in cooperation with the hinge shaft and comprises a return spring and a steel ball; the return spring is in a compressed state, one end of the return spring is propped against the acting surface in the movable part, and the other end of the return spring is propped against the steel ball; corresponding to the steel ball, a round hole with the diameter slightly smaller than the outer diameter of the steel ball is formed in the wall surface of the movable part, a part of spherical surface of the steel ball protrudes from the round hole and is exposed outside under the elastic action of the return spring, the exposed spherical surface of the steel ball is matched, and a spherical concave surface for accommodating the exposed spherical surface is arranged on the fixed part; when the movable part and the fixed part are coaxial, the spherical concave surface can ensure that the exposed spherical surface area of the steel ball is the maximum value; when the movable part rotates obliquely, the steel balls are limited by the spherical concave surfaces to shrink inwards, and when the movable part rotates to the maximum inclination angle, the steel balls shrink inwards to the position where the exposed spherical surface area is the minimum value.

9. The automatic reset structure of claim 8, wherein: the return spring is arranged in parallel relative to the hinge shaft.

10. The automatic reset structure of claim 8, wherein: the return spring is vertically arranged relative to the hinge shaft.