CN212507777U - Split type key and anti-theft lock capable of sealing keyhole - Google Patents

Abstract

The utility model provides a split type key and can seal the pickproof lock utensil of keyhole relates to pickproof lock technical field, has solved the technical problem that the key that exists can't unblank under the keyhole confined state among the prior art. The split type key comprises a handle part and an unlocking part; the handle portion with can dismantle the connection between the lock opening portion after the lock opening portion stretches into the keyhole of lock body, handle portion with the lock opening portion can break off each other and handle portion with the lock opening portion homoenergetic with the lock body is connected, operates handle portion can drive the lock opening portion moves. The anti-theft lock capable of sealing the lock hole comprises a lock body and a split type key. The utility model is used for a can be under the keyhole confined condition, unblank handle portion and the mutual disconnection of portion of unblanking, improve the split type key of tool to lock theftproof performance and can seal the theftproof tool to lock of keyhole.

Description

Split type key and anti-theft lock capable of sealing keyhole

Technical Field

The utility model belongs to the technical field of the pickproof lock technique and specifically relates to a split type key and set up the pickproof lock utensil that can seal the keyhole of this split type key.

Background

The mechanical lockset on the market at present, the key handle and the key column that it contains are fixed connection, when inserting the key in the lockhole, when the staff rotated the key handle, the key handle directly drove the key column and rotate and unblank, the lockhole of mechanical lock is also in the state of communicating with the external world at the in-process of unblanking, when having lawless persons to pick the lock, it stretches into the lockhole with the one end of unlocking tool, the other end that people operated unlocking tool outside the lockhole carries out the technique and unblanks can, the theftproof grade is lower, if research and development a product can be closed the keyhole when unblanking, then the key among the prior art just can't satisfy and stay its part in the keyhole and can operate outside the keyhole and unblank.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a split type key and set up this split type key can seal the theftproof tool to lock of keyhole to solve the technical problem that the key that exists among the prior art can't unblank under the keyhole confined state. The following explains various technical effects that can be produced by the preferred technical scheme in the technical schemes of the utility model.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a split key, which comprises a handle part and an unlocking part; wherein the content of the first and second substances,

handle portion with for dismantling the connection between the portion of unblanking behind the lock hole that the lock body was stretched into to the portion of unblanking, handle portion with the portion of unblanking can break off each other and handle portion with the portion of unblanking homoenergetic with the lock body is connected, operates handle portion can drive the portion of unblanking carries out the motion.

In a preferred or alternative embodiment, the split key further comprises a sleeve slidably disposed outside the connection between the handle portion and the unlocking portion.

In a preferred or optional embodiment, the handle portion comprises a first connecting piece rotatably connected with the handle portion, the unlocking portion comprises a second connecting piece rotatably connected with the unlocking portion, one of the first connecting piece and the second connecting piece is provided with a hook, and the other one of the first connecting piece and the second connecting piece is provided with a through groove matched with the hook.

In a preferred or optional embodiment, a protruding point is arranged on the outer surface of the handle portion, a sliding groove matched with the protruding point is arranged on the sleeve, and when the sleeve moves to be close to the handle portion and the sliding groove abuts against the protruding point, the first connecting piece and the second connecting piece are exposed from the sleeve.

In a preferred or alternative embodiment, the unlocking portion has a cylindrical shape, and at least two ring grooves are provided on an outer surface thereof, the at least two ring grooves having different lengths in a circumferential direction of the unlocking portion.

In a preferred or alternative embodiment, the unlocking portion has a cylindrical shape, and at least three ring grooves are provided on an outer surface thereof, at least two of the ring grooves being different in length in a circumferential direction of the unlocking portion.

In a preferred or alternative embodiment, one end of each annular groove is aligned with the same side, and an insertion groove axially arranged along the unlocking part is arranged at the aligned position of the annular grooves.

In a preferred or alternative embodiment, a recess is provided in the end of the latch remote from the handle portion.

The utility model provides an anti-theft lock which can seal the keyhole, comprising a lock body and a split key provided by any technical proposal of the utility model; wherein the content of the first and second substances,

the lock body includes lock core device and blocking device, be provided with the keyhole on the lock core device, blocking device set up in the oral area of keyhole split type key inserts behind the keyhole, at least part of blocking device can with the keyhole oral area is sealed, just handle portion with the lock core device and/or blocking device is connected, the part of unblanking with the lock core device and/or blocking device is connected.

In a preferred or alternative embodiment, the locking device comprises a driving device and a sealing piece, wherein a power input end of the driving device can be connected with the handle part, a power output end of the driving device is connected with the sealing piece, the sealing piece is arranged at the mouth part of the keyhole, and when the split key is inserted into the keyhole, the driving device can drive the sealing piece to move towards the connection part of the handle part and the unlocking part and apply pressure to the connection part of the handle part and the unlocking part to mutually disconnect the handle part and the unlocking part.

Based on the technical scheme, the embodiment of the utility model provides a can produce following technological effect at least:

the utility model provides a split type key, including handle portion and unlocking portion, handle portion with for dismantling the connection between the unlocking portion split type key inserts when can be with keyhole confined lock in vivo, handle portion can with the mutual disconnection of unlocking portion makes the unlocking portion stays inside the keyhole, handle portion is located the keyhole outside, and because handle portion with the unlocking portion homoenergetic with the lock body is connected, consequently seals behind the keyhole external operation handle portion just can drive the unlocking portion motion in the keyhole realizes unblanking.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of an anti-theft lock capable of sealing a keyhole according to the present invention;

fig. 2 is a schematic view of an explosion structure of the lock body provided by the present invention;

FIG. 3 is a schematic view of the latch of FIG. 2;

FIG. 4 is a schematic illustration of the position of the locking device and the top member prior to insertion of the split-type key shown in FIG. 2;

FIG. 5 is a schematic illustration of the lock and top member positions after insertion of the split-key shown in FIG. 2;

FIG. 6 is a schematic view of the outer end disk structure of FIG. 2;

FIG. 7 is a schematic view of the lock ring and detent assembly of FIG. 2;

FIG. 8 is a schematic view of the locking ring structure shown in FIG. 6;

FIG. 9 is an exploded view of the latch and housing and turntable shown in FIG. 2;

FIG. 10 is an exploded view of the locking pin and lock housing of FIG. 2;

fig. 11 is a schematic view of an explosion structure of the split key provided by the present invention;

FIG. 12 is a view of the unlocking portion and inner end of FIG. 11 shown rotated at an angle;

fig. 13 is a schematic view of the connection between the unlocking part and the closing member provided by the present invention;

fig. 14 is a schematic sectional view of the lock body according to the present invention before the split key is inserted;

fig. 15 is a schematic sectional view of the lock body according to the present invention before the lock body is rotated after the split key is inserted;

fig. 16 is a schematic view of a sectional structure of the lock body after the split key is rotated.

In the drawings, 1, a lock shell; 11. a slot; 2. a lock cylinder device; 21. a keyhole; 22. a locking ring; 221. a clamping hole; 222. locking the groove; 223. a boss; 23. an inner end disc; 231. a first jack; 232. a protrusion; 24. an outer end disk; 241. a second jack; 25. a housing; 251. a through hole; 252. an outer chute; 26. rotating the disc; 261. a moving groove; 3. a locking device; 31. a drive device; 311. a power member; 3121. a gear; 3122. a rack; 32. a closure; 321. a sliding groove; 322. a clamping bulge; 4. a clamping component; 41. a top pillar; 5. a top piece; 6. a lock cylinder; 8. a lock pin; 81. a traveler; 9. a turntable; 91. an inner chute; 101. a handle portion; 1011. a first connecting member; 1012. a through groove; 1013. salient points; 102. an unlocking portion; 1021. a second connecting member; 1022. hooking; 1023. a groove; 1024. a ring groove; 1025. inserting and connecting the bulges; 1026. inserting grooves; 103. a sleeve; 1031. a chute.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The utility model provides a can be under the keyhole confined condition, unblank handle portion and the mutual disconnection of portion of unblanking, improve the split type key of tool to lock theftproof performance and can seal the theftproof tool to lock of keyhole.

The technical solution provided by the present invention will be explained in more detail with reference to fig. 1 to 16.

Example (b):

the lock body comprises a lock shell 1, a lock cylinder device 2, a lock column 6 and a lock pin 8, the lock shell 1 is sleeved outside the lock cylinder device 2, the lock cylinder device 2 comprises a plurality of lock rings 22, an inner end disc 23, an outer end disc 24 and a shell 25 which are arranged side by side, the inner end disc 23 and the outer end disc 24 are respectively arranged at two ends of the lock rings 22 and used for limiting the axial displacement of the lock rings 22, and the shell 25 is sleeved outside the lock rings 22 and the inner end disc 23; each lock ring 22 is hollow to form a lock hole 21, after a split key is inserted into the lock hole 21, the lock ring 22 and the outer shell 25 can rotate relatively, and when the lock shell 1 and the outer shell 25 rotate to a proper position, unlocking can be completed; the lock case 1 is provided with a slot 11, the lock pin 8 is slidably mounted in the slot 11, the lock pin 8 is provided with a sliding column 81, the shell 25 is provided with an outer sliding groove 252, the sliding column 81 is slidably mounted in the outer sliding groove 252, the rotation of the shell 25 can drive the lock pin 8 to slide in the slot 11 through the outer sliding groove 252, and the lock is unlocked after the lock pin 8 slides out of a lock hole on a door frame. The number of the lock columns 6 corresponds to the number of the lock rings 22, the lock grooves 222 are formed in the outer surfaces of the lock rings 22, through holes 251 are formed in the lock shell 1 and the outer shell 25, the lock columns 6 are inserted into the through holes 251 in the lock shell 1 and the outer shell 25 before unlocking, the lock shell 1 and the outer shell 25 cannot rotate relatively, when the lock rings 22 enable the lock columns 6 to fall into the lock grooves 222 in the rotating process, the lock columns are separated from the through holes 251 in the lock shell 1, and when each lock column 6 is separated from the through hole 251 in the lock shell 1, the lock shell 1 and the outer shell 25 can rotate relatively.

The lock body further comprises a locking device 3, a top piece 5 and a clamping assembly 4, the locking device 3 comprises a closing piece 32, a power piece 311, a gear 3121 and a rack 3122, the lock cylinder device 2 further comprises a rotating disc 26, the rotating disc 26 is arranged on the outer side of the outer end disc 24, a moving groove 261 is arranged on the rotating disc 26, the closing piece 32 is arranged in the moving groove 261 and can slide in the moving groove 261, the power piece 311 is arranged on the split key, the rack 3122 is arranged on the closing piece 32, during the insertion process of the split key, the power piece 311 is meshed with the gear 3121 to drive the gear 3121 to rotate, the rotation of the gear 3121 drives the movement of the rack 3122 to drive the closing piece 32 to move in the moving groove 261 along the radial direction to block the keyhole 21. Each lock ring 22 is also eccentrically provided with a clamping hole 221, the clamping assembly 4 comprises a plurality of top columns 41, the number of the top columns 41 is two more than that of the lock rings 22, the thickness of the top columns 41 is equal to that of the lock rings 22, the top columns 41 can be inserted into the clamping holes 221, the closing part 32 is provided with a sliding groove 321, the top part 5 is of a T-shaped structure, before unlocking, the vertical section of the locking assembly 4 is positioned in the sliding groove 321, which is the first working position, one end of the locking assembly 4 is abutted against the top piece 5, each top column 41 included in the locking assembly 4 is inserted into two adjacent locking rings 22, the top column 41 positioned at the outermost end is inserted into the clamping hole 221 of the locking ring 22 positioned at the outermost end and the second insertion hole 241 of the outer end disc 24, and the top column 41 positioned at the innermost end is inserted into the clamping hole 221 of the locking ring 22 positioned at the innermost end and the first insertion hole 231 of the inner end disc 23, so that the locking rings 22 cannot rotate (as shown in fig. 14). After the closure member 32 blocks the keyhole 21 in the radial direction, the top member 5 is pulled out of the sliding groove 321 and moves outward, so as to drive the detent assemblies 4 to move outward, and each top post 41 is only located in one of the locking rings 22, and the top posts 41 at the end are only located in the second insertion holes 241, and at this time, the relative movement between each locking ring 22 is not influenced by each other, and the rotation can be performed (as shown in fig. 15). Be provided with boss 223 in the keyhole 21 of every catch 22, be provided with a plurality of annular 1024 on the split type key, every annular 1024 is all inequality along its circumference length, the length of annular 1024 matches with corresponding locked groove 222 position on the catch 22, namely the split type key drives catch 22 and rotates behind the certain position, lock cylinder 6 just can be deviate from in the through-hole 251 of lock shell 1 completely, after the split type key inserts the keyhole 21, boss 223 on every catch 22 all is located every annular 1024 on the split type key, in split type key rotation in-process, it is corresponding with corresponding locked groove 222 with each lock cylinder 6, after every lock cylinder 6 all deviates from in the through-hole 251 of lock shell 1, lock shell 1 and shell 25 just can take place relative rotation, thereby realize unblanking.

The split type key comprises a handle part 101, an unlocking part 102 and a sleeve 103, wherein the handle part 101 comprises a first connecting piece 1011 rotationally connected with the handle part, the unlocking part 102 comprises a second connecting piece 1021 rotationally connected with the unlocking part, one of the first connecting piece 1011 and the second connecting piece 1021 is provided with a hook 1022, the other one of the first connecting piece 1011 and the second connecting piece 1021 is provided with a through groove 1012 matched with the hook 1022, and each rotational connection part is provided with a torsion spring which can help the first connecting piece 1011 and the second connecting piece 1021 to reset; before unlocking, the first connecting piece 1011 and the second connecting piece 1021 are connected, the sleeve 103 is sleeved outside the first connecting piece 1011 and the second connecting piece 1021, in the process of inserting the keyhole 21, the inner diameter of the keyhole 21 is smaller than the outer diameter of the sleeve 103, so that the sleeve 103 can be pushed to the position opposite to the inserting direction, at the moment, the first connecting piece 1011 and the second connecting piece 1021 are exposed, the closing piece 32 moves towards the first connecting piece 1011 and the second connecting piece 1021 while the split key is inserted, and presses the first connecting piece 1011 and the second connecting piece 1021 to disconnect (as shown in fig. 15), after the closing piece 32 completely closes the keyhole 21, the clamping protrusion 322 on the closing piece 32 is connected with the inserting protrusion 1025 on the unlocking part 102, the power piece 311 connected on the handle part 101 can be inserted into the rotating disc 26, at the moment, the power piece 311 on the handle part 101 is rotated, and the power piece 311 on the handle part 101 drives the rotating disc 26 to rotate, the rotating disc 26 rotates the closing member 32 in the moving groove 261 thereof, so that the closing member 32 rotates the unlocking portion 102, thereby unlocking the lock; after the unlocking is finished, the split key is rotated to the initial position in the opposite direction of the unlocking, and the lock ring 22 is pulled out after being reset.

In addition, the lock body also comprises a rotary table 9, the rotary table 9 and the lock cylinder device 2 are mutually independent, and an inner sliding groove 91 is arranged on the rotary table 9; the lock pin 8 is provided with two sliding columns 81, one sliding column 81 is arranged in the outer sliding groove 252, and a split key can be used for enabling the lock shell 1 and the shell 25 to rotate relatively, so that the lock pin 8 is driven to slide for unlocking; the other sliding column 81 is installed in the inner sliding groove 91, and can directly rotate the lock case 1 and the outer case 25 relatively by screwing the rotary table 9 in the door, so as to drive the lock pin 8 to slide for unlocking.

As shown in fig. 1 to 16, the split key provided by the present invention comprises a handle part 101 and an unlocking part 102; wherein the content of the first and second substances,

the handle part 101 and the unlocking part 102 are detachably connected, after the unlocking part 102 extends into the keyhole 21 of the lock body, the handle part 101 and the unlocking part 102 can be disconnected with each other, the handle part 101 and the unlocking part 102 can be connected with the lock body, and the operating handle part 101 can drive the unlocking part 102 to move.

The utility model provides a split type key, including handle portion 101 and unlocking portion 102, handle portion 101 and the connection of unblanking between the portion 102 for dismantling, when split type key inserts can be with keyhole 21 confined lock body in, handle portion 101 can with the portion 102 mutual disconnection that unblanks, make the portion 102 of unblanking stay inside keyhole 21, handle portion 101 is located keyhole 21 outside, and because handle portion 101 and unlocking portion 102 homoenergetic are connected with the lock body, consequently, behind the closed keyhole 21, the portion 102 motion realization of unblanking in keyhole 21 outside operation handle portion 101 just can drive keyhole 21 is unblanked.

In a preferred or alternative embodiment, the split-type key further comprises a sleeve 103, and the sleeve 103 is slidably disposed outside the connection between the handle portion 101 and the unlocking portion 102. When the handle portion 101 and the unlocking portion 102 are connected, the sleeve 103 can play a role of protection, and prevent the handle portion 101 and the unlocking portion 102 from being disconnected due to external force.

In a preferred or alternative embodiment, the handle portion 101 includes a first connecting member 1011 rotatably connected thereto, the unlocking portion 102 includes a second connecting member 1021 rotatably connected thereto, one of the first connecting member 1011 and the second connecting member 1021 is provided with a hook 1022, and the other is provided with a through slot 1012 adapted to the hook 1022.

Specifically, a torsion spring is provided at each rotational connection for maintaining the connection between the first connection member 1011 and the second connection member 1021 in a normal state, and for restoring the first connection member 1011 and the second connection member 1021 under the releasing force.

In a preferred or alternative embodiment, the outer surface of the handle 101 is provided with a protruding point 1013, the sleeve 103 is provided with a sliding slot 1031 adapted to the protruding point 1013, and when the sleeve 103 moves to approach the handle 101 until the sliding slot 1031 abuts against the protruding point 1013, the first connecting member 1011 and the second connecting member 1021 are exposed from the sleeve 103. The external force is facilitated to disconnect the first connector 1011 and the second connector 1021.

As a preferred or alternative embodiment, the unlocking portion 102 has a cylindrical shape, and at least two ring grooves 1024 are provided on an outer surface thereof, the at least two ring grooves 1024 differing from each other in length in the circumferential direction of the unlocking portion 102. The lock cylinder device 2 is used for being matched with the lock cylinder device on the lock body to unlock, the lengths of the lock cylinder device and the lock cylinder device are different from each other, the lock picking difficulty can be increased, and the safety is improved.

As a preferred or alternative embodiment, the unlocking portion 102 has a cylindrical shape, and at least three ring grooves 1024 are provided on an outer surface thereof, and at least two ring grooves 1024 among the at least three ring grooves 1024 have different lengths in a circumferential direction of the unlocking portion 102. The lock cylinder device 2 is used for being matched with the lock cylinder device on the lock body to unlock, the lengths of the lock cylinder device and the lock cylinder device are different from each other, the lock picking difficulty can be increased, and the safety is improved.

In a preferred or alternative embodiment, one end of each ring groove 1024 is aligned with the same side, and a plug-in groove 1026 is disposed at the aligned position and axially disposed along the locking portion 102. The insertion slot 1026 is adapted to engage the ledge 223 on the cylinder core assembly 2 upon initial insertion into the keyhole 21.

As a preferred or alternative embodiment, a groove 1023 is provided on the unlocking portion 102 at an end remote from the handle portion 101.

The unlocking mechanism is used for being matched with the protrusions 232 on the inner end disc 23 of the lock body, the limiting blocks are arranged on the inner end disc 23, after the grooves 1023 and the protrusions 232 are inserted into each other, the rotation of the unlocking portion 102 can drive the inner end disc 23 to rotate until the limiting blocks rotate to stop rotating, so that the rotation of the unlocking portion 102 is limited, the unlocking portion 102 is prevented from continuously rotating in the unlocking process, and unlocking cannot be achieved; the limiting block is of a fan-shaped structure, and the central angle of the limiting block and the rotating angle of the unlocking part 102 are equal to 360 degrees.

The utility model provides an anti-theft lock which can seal the keyhole, comprising a lock body and a split key provided by any technical proposal of the utility model; wherein the content of the first and second substances,

the lock body comprises a lock cylinder device 2 and a locking device 3, a lock hole 21 is formed in the lock cylinder device 2, the locking device 3 is arranged at the opening of the lock hole 21, at least part of the locking device 3 can seal the opening of the lock hole 21 after a split key is inserted into the lock hole 21, a handle part 101 is connected with the lock cylinder device 2 and/or the locking device 3, and an unlocking part 102 is connected with the lock cylinder device 2 and/or the locking device 3.

In a preferred or alternative embodiment, the locking device 3 comprises a driving device 31 and a closing member 32, a power input end of the driving device 31 can be connected with the handle portion 101, a power output end of the driving device 31 is connected with the closing member 32, the closing member 32 is arranged at the mouth of the keyhole 21, and when the split key is inserted into the keyhole 21, the driving device 31 can drive the closing member 32 to move towards the joint of the handle portion 101 and the unlocking portion 102 and apply pressure to the joint of the handle portion 101 and the unlocking portion 102 to disconnect the handle portion 101 and the unlocking portion 102 from each other.

Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.

If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.

Also, above-mentioned the utility model discloses if disclose or related to mutually fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connection (such as riveting and welding), of course, the mutual fixed connection can also be an integral structure (for example, the mutual fixed connection is manufactured by casting and integral forming instead (except that the integral forming process can not be adopted obviously).

In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated. The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (10)

1. A split key is characterized by comprising a handle part and an unlocking part; wherein the content of the first and second substances,

handle portion with for dismantling the connection between the portion of unblanking behind the lock hole that the lock body was stretched into to the portion of unblanking, handle portion with the portion of unblanking can break off each other and handle portion with the portion of unblanking homoenergetic with the lock body is connected, operates handle portion can drive the portion of unblanking carries out the motion.

2. The split key of claim 1, further comprising a sleeve slidably disposed outside a junction of the handle portion and the unlocking portion.

3. The split-type key according to claim 2, wherein the handle portion comprises a first connecting member rotatably connected therewith, the unlocking portion comprises a second connecting member rotatably connected therewith, one of the first connecting member and the second connecting member is provided with a hook, and the other one of the first connecting member and the second connecting member is provided with a through groove matched with the hook.

4. The split key of claim 3, wherein the outer surface of the handle portion is provided with a protruding point, the sleeve is provided with a sliding groove matched with the protruding point, and when the sleeve moves to a position close to the handle portion and the sliding groove abuts against the protruding point, the first connecting piece and the second connecting piece are exposed from the sleeve.

5. The split key of claim 1, wherein the unlocking part has a cylindrical shape, and at least two ring grooves are provided on an outer surface thereof, and lengths of the at least two ring grooves in a circumferential direction of the unlocking part are different from each other.

6. The split key of claim 1, wherein the unlocking part has a cylindrical shape, at least three ring grooves are provided on an outer surface thereof, and at least two of the at least three ring grooves have different lengths in a circumferential direction of the unlocking part.

7. The split key of claim 5 or 6, wherein one end of each of the ring grooves is aligned with the same side, and an insertion groove is formed at the aligned position of the ring grooves along the axial direction of the locking part.

8. The split key of claim 1, wherein a groove is provided in the unlocking portion at an end remote from the handle portion.

9. An anti-theft lock capable of closing a keyhole, comprising a lock body and the split key of any one of claims 1 to 8; wherein the content of the first and second substances,

the lock body includes lock core device and blocking device, be provided with the keyhole on the lock core device, blocking device set up in the oral area of keyhole split type key inserts behind the keyhole, at least part of blocking device can with the keyhole oral area is sealed, just handle portion with the lock core device and/or blocking device is connected, the part of unblanking with the lock core device and/or blocking device is connected.

10. The lockable keyhole antitheft lock according to claim 9, wherein the locking device comprises a driving device and a sealing element, a power input end of the driving device is connectable with the handle portion, a power output end of the driving device is connected with the sealing element, the sealing element is arranged at the mouth of the keyhole, and when the split key is inserted into the keyhole, the driving device can drive the sealing element to move towards the joint of the handle portion and the unlocking portion and apply pressure to the joint of the handle portion and the unlocking portion to mutually disconnect the handle portion and the unlocking portion.

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