CN112709499A - Lock capable of preventing technical unlocking - Google Patents

Abstract

The scheme provides a lockset for preventing technical unlocking, which comprises a lock shell, a lock body and a key with a key body, the lock body is internally provided with an axial blade groove, a plurality of blade units are arranged and combined in the blade groove in an overlapping way, the center of the blade unit is provided with a slotted hole for the key body to pass through, the slotted holes of the blade units are overlapped to form a key channel correspondingly matched with the tooth socket, the center of the key body is provided with a wave middle shaft which is punched upwards with equal thickness, the tooth socket on the key body comprises at least one deep tooth socket with a transverse groove, the blade unit comprises a rotation limiting blade correspondingly matched with the deep tooth socket, the key body section where the deep tooth socket is positioned can radially rotate around the central shaft of the key body in the extension arc hole for limiting an angle to reverse unlocking, the slot hole of the rotation limiting blade is matched and identified with the key body at the position in the key channel through the deep tooth groove of the key body. The whole verification structure has no spring, good stability, long service life, compact structure and strong anti-theft performance.

Description

Lock capable of preventing technical unlocking

Technical Field

The invention relates to a mechanical anti-theft lock, in particular to a mechanical lock capable of preventing technical unlocking.

Background

At present, locks on the market are various in types and different in structure, wherein the mechanical lock is widely applied to life of people, is not influenced by occasions and environment, and is high in stability. Along with the security protection requirement of people on lock products is higher and higher, the lock hole is generally hidden or idle running is adopted in the market to avoid violent unlocking, the safety level of the lockset is increased to a certain extent, however, the lock core of the blade lock, the spring lock or the coded lock is substantial, or the pin is designed, namely, the pin is pushed to the proper position in different degrees through the teeth on the key, and the lockset designed by the pin can be unlocked by a universal key for people with certain unlocking skills. The unlocking principle of the universal key is as follows: the strip-shaped key body extending along the length direction is matched with a tooth die and other poking tools to poke the lock cylinder to achieve the purposes of opening various locks without damaging the ring shape and obvious traces. The lockset can not play a role in preventing theft completely, and unsafe feeling is added to people.

Disclosure of Invention

The invention provides a mechanical lock which has good anti-theft performance and can prevent being unlocked by a universal key.

In order to solve the technical problems, the invention adopts the following technical scheme: a lock for preventing technical unlocking comprises a lock shell, a lock body and a matched key, wherein the lock body is arranged in the lock shell and provided with a key hole, the key comprises a handle part and a key body, the key body extends forwards, a plurality of tooth grooves are formed in two sides or one side of the key body to form tooth patterns, blade grooves are axially arranged in the lock body, a plurality of blade units are stacked in the blade grooves in a arrayed and combined mode, a slotted hole for the key body to penetrate through is formed in the center of each blade unit, key channels correspondingly matched with the tooth grooves are formed in the slotted holes of the plurality of blade units in a stacked mode, namely the lock body judges the condition of adapting to the key through the clockwise or anticlockwise rotating reversing relation of the slotted holes of the blade units to the key body at the position in the key channels; the key body is provided with a wave middle shaft which is formed by punching upwards in an equal thickness manner, namely, the wave middle shaft is protruded on the upper surface of the center of the key body, the wave middle shaft is recessed on the lower surface of the center of the key body, the tooth grooves on the key body comprise at least one deep tooth groove which is transversely grooved, the depth of the deep tooth groove is more than half of the maximum width of the key body, namely, the deep tooth groove penetrates through the central shaft of the key body, and the bottom of the deep tooth groove is positioned on the wave middle shaft or on the other side of the wave middle shaft; the blade unit comprises a rotation limiting blade correspondingly matched with the deep tooth socket, the thickness of the rotation limiting blade corresponds to or is smaller than the width of the deep tooth socket, a slotted hole of the rotation limiting blade comprises an insertion hole corresponding to the hole shape of the key body, and an extension arc hole which extends from the opposite half side of the deep pressing groove of the insertion hole by taking the concave bottom of the lower surface of the insertion hole corresponding to the concave center shaft as the center and is communicated with the insertion hole in the limited rotation direction of the key to form an extension arc hole communicated with the insertion hole, the radius of the extension arc hole is half of the maximum width of the key body, the communication width of the insertion hole and the extension arc hole is larger than half of the maximum width of the key body, when the key body is matched and unlocked with the lock body, the deep tooth socket can radially rotate relative to the rotation limiting blade at the insertion hole position and is not limited, the key body section where the deep tooth socket is positioned can radially rotate around the central shaft of the key body in the extension arc hole to limit angle to be unlocked And (5) matching and identifying.

As an improvement: the key comprises a key body, a lock shell and a lock assembly, wherein the middle part of the top end of the key body is provided with an inner groove which is concave towards the length direction of the key, so that a driving convex part is formed at the front top end of the key body; the driving convex part comprises a locking free position and a reversing unlocking position in the limiting hole, the lock body at the end of the locking bolt of the locking piece extends outwards to be in a locking state, the limiting hole is aligned with the key channel, a key passes through the key channel, and the driving convex part at the front end is inserted into the limiting hole to be free from stress, namely the driving convex part is in the locking free position in the limiting hole; if the key body is matched with the lock body, namely the key body can rotate clockwise or anticlockwise in the key channel for reversing, the driving convex part rotates to the reversing unlocking position in the limiting hole, the surface of the driving convex part at the front end of the key abuts against and pushes the corresponding inner wall of the limiting hole to enable the locking piece to overcome the elastic force of the locking spring to move inwards, the lock tongue end retracts, and the mechanical unlocking of the locking assembly by the key is realized.

As an improvement: the locking piece of the locking assembly comprises a left locking piece and a right locking piece which are oppositely arranged up and down, the left locking piece and the right locking piece are partially staggered in the left-right direction, the upper and lower opposite sides of the staggered section are provided with missing teeth, the missing teeth on the two opposite sides are oppositely formed into limiting holes up and down, and the locking spring is abutted between the left locking piece and the right locking piece; in a locked state of the lock body, the left locking piece and the right locking piece are respectively expanded outwards under the elastic force of the locking spring, so that two lock tongue ends of the left locking piece and the right locking piece extend outwards; during unlocking, the driving convex part rotates to the reversing unlocking position from the locking free position in the limiting hole, so that the left locking piece and the right locking piece overcome the elastic force of the locking spring and move inwards leftwards and rightwards, and the two lock tongue ends of the left locking piece and the right locking piece retract to realize unlocking.

As an improvement: the inner groove is arranged in the center of the front end of the key body, the bottom of the inner groove is located on a wave center shaft, two driving convex parts matched with the limiting hole are formed on the left side and the right side of the inner groove of the front end of the key body respectively, the distance between the two driving convex parts is larger than the vertical distance between the highest point and the lowest point of the key body in the thickness direction, in the process of transferring to the reversing unlocking position from the locking free position, the outer side surfaces in the width direction of the two driving convex parts are abutted and pushed to act on the inner wall of the limiting hole, the limiting hole is opened in the width direction of the two driving convex parts of the key body after the elastic force of the locking spring is overcome, the left locking piece and the right locking piece move inwards in the left-right.

As an improvement: the scarce tooth on left side locking piece and the right locking piece include to the bellied location convex ridge of opposite face, it pushes away the millet to be located the support of location convex ridge left and right sides respectively, two location convex ridges that set up relatively enclose with pushing away the millet and establish the spacing hole that corresponds with the key body front end, when lock body locking state, two location convex ridges on left side locking piece and the right locking piece are close to relatively from top to bottom and form discontinuous or continuous central reference column, the key body inserts the key passageway, insert when spacing hole at two drive convex parts, central reference column card inlays in the inner groovy, correspond the cooperation with the inner groovy, the calibration central point puts and prescribes a limit to the depth of insertion of key.

As an improvement: the rotation limiting blade is a lower rotation limiting blade, an extension arc hole of the lower rotation limiting blade extends from the lower half of an insertion hole with a hole shape corresponding to the outer surface of the key body to the rotation limiting direction of the key, so that a rotation limiting convex top facing to the concave bottom and close to the concave bottom is formed on the lower rotation limiting blade, and the key body section where the deep tooth groove is located can radially rotate downwards to limit the angle, namely the arc angle of the extension arc hole is 90-135 degrees.

As an improvement: the rotation limiting blade is an upper rotation limiting blade, an extension arc hole of the upper rotation limiting blade extends from the upper half edge of an insertion hole with a hole shape corresponding to the outer surface of the key body to the key limited rotation direction, the extension arc hole of the upper rotation limiting blade is fan-shaped, and the key body section where the deep tooth socket is located can rotate radially by a limited angle, namely the arc angle of the extension arc hole is 90-135 degrees.

As an improvement: the blade unit including arranging the gate of key passageway in and be used for calibrating key deepest initial position and restriction key passageway turned angle's calibration piece unit, the calibration piece unit includes that the center is opened the big calibration piece that has the round hole, is inlayed and is established in the round hole and for the rotatable disk of round hole, the key hole that corresponds with key body surface is opened at small circle piece center, small circle piece and round hole between realize through the cooperation of slider with the guide way that the disk is at the restricted rotation of round hole internal angle.

The lock for preventing technical unlocking adopts the multiple blade units which are overlapped and fixed in the blade grooves to form the key channel, whether the key is matched for unlocking is verified through whether the key can rotate in the key channel, the key channel and the multiple blade units are fixed and do not have linkage deformation in the whole verification process, and the whole verification structure has no spring, good stability, long service life, compact structure and strong theft prevention. Meanwhile, in the production configuration, the blade units can be configured and sequenced as required, the thickness of the blade units is adjusted, different numbers of blade unit types are distributed to generate lock body lock cylinders with different passwords and precision, the processing and the assembly are simple and convenient, and the customization is facilitated. And the deep tooth groove with the groove bottom passing through the center is combined with the key body with the wave middle shaft and the rotation limiting blade which only can rotate at the corresponding position of the deep tooth groove to verify, match and unlock, and the encryption and the anti-theft performance are very strong. The non-square key hole can play a role in covering the interior of the key channel, so that the condition that the key channel is observed through the key hole when the technology is started is avoided, and the anti-theft performance of the key channel is improved. The deep tooth socket ensures that the central shaft of the key body is discontinuous in disconnection in the length direction, breaks through a long strip basic structure of the master key, effectively avoids the possibility of technical opening, and greatly improves the anti-theft property.

The invention is described in further detail below with reference to the figures and examples.

Drawings

Fig. 1 is a schematic structural diagram of a lock for preventing technical unlocking according to the present invention.

Fig. 2 is an exploded view of the lock body and key.

Fig. 3 is a schematic structural view of the locking assembly in a locked state.

Fig. 4 is a schematic structural view of the locking assembly in an unlocked state.

Fig. 5 is a schematic view of the structure of the key.

Fig. 6 is a schematic structural view of the upper and lower rotor blades.

Fig. 7 is a schematic structural view of the right deep socket and the lower turning vane in a locked state.

Fig. 8 is a structural schematic diagram of the right deep tooth socket and the lower limit rotating blade in a reversing unlocking state.

FIG. 9 is a schematic view of the left deep socket and the upper turning vane in a locked state.

FIG. 10 is a schematic structural view of the left deep tooth socket and the upper limit rotating blade in a reversing unlocking state

FIG. 11 is a schematic diagram of the structure of the calibration sheet unit.

Detailed Description

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 10, and fig. 11, an embodiment of the lock device for preventing technical unlocking provided by the present invention is a U-shaped lock, but may also be other types of locks, including a lock housing 1, a lock body with a keyhole disposed in the lock housing 1, a matching key 2, and a locking assembly capable of being mechanically controlled to unlock by a key directly at the foremost end in the lock housing, where the key 2 includes a handle portion 2-1 and a key body 2-2 extending forward and having a plurality of tooth sockets forming teeth on two sides or one side.

The lock body is internally provided with an axial blade groove 3, a plurality of blade units are stacked in the blade groove 3 in a permutation and combination mode, the center of each blade unit is provided with a slotted hole for a key body to pass through, the slotted holes of the blade units are stacked to form a key channel correspondingly matched with the tooth socket, in order to facilitate sequencing and adjustment, the blade units with the same thickness are adopted, namely, a grid-plate type structure, and the thickness selection of the blade units also directly influences the precision of the lock body. The U-shaped lock of the embodiment is a lock body which can rotate 90 degrees anticlockwise by a matched key, is reversed and is directly unlocked through a locking assembly. Of course, the rotation direction and the rotation angle can be changed by adjusting the slot holes, namely the blade units, according to the requirements. The U-shaped lock body determines the matching condition with the key through the anticlockwise rotation reversing relation of the position of the key body in the key channel through the slotted hole of the blade unit.

The center of the key body 2-2 is provided with a wave middle shaft which is punched upwards in equal thickness, namely the wave middle shaft is provided with a middle shaft bulge 2-3 at the upper surface of the center of the key body, the wave middle shaft is provided with a middle shaft indent 2-4 at the lower surface of the center of the key body, in order to improve the anti-theft property, the left side and the right side of the key body 2-2 of the embodiment are provided with a deep tooth socket 2-5 and a plurality of shallow tooth sockets 2-8 which are transversely grooved, tooth patterns matched with a key channel are formed at the left side and the right side of the key body 2-2 by the deep tooth socket 2-5 and the shallow tooth sockets 2-8, the deep tooth socket 2-5 at the left side of the key body 2-2 is a left deep tooth socket, the deep tooth socket 2-5 at the right side of the key body 2-2 is a right deep tooth socket, the depth of the deep tooth groove 2-5 is slightly larger than half of the maximum width of the key body, namely the deep tooth groove 2-5 penetrates through the central shaft of the key body, the bottom of the deep tooth groove 2-5 is positioned on the wave middle shaft, and the bottom of the groove can be positioned on the other side of the wave middle shaft if the key is proper in width.

The key passage with the grid-type structure is composed of a plurality of rotation limiting blades 5 correspondingly matched with the deep tooth sockets 2-5, a calibration sheet unit arranged at the door opening of the key passage and used for calibrating the deepest initial position of the key and limiting the rotation angle of the key passage, a plurality of position blade units 53 and a plurality of universal blade units 54. The slot of the universal blade unit 54 is a circular hole, and the width of the key is verified at the section of the key channel where the universal blade unit 54 is located; the slotted hole of the position blade unit 53 is in a shape of a middle round hole with two lugs on the left and right, the slotted hole of the position blade unit 53 can enable the key body where the tooth socket with the socket depth larger than the length of the two lugs is located to rotate, and the position blade unit 53 is used for corresponding to shallow tooth sockets 2-8 on the key body in the embodiment.

The calibration piece unit includes that the center opens the big calibration piece 9 that has the round hole, inlays and establishes in the round hole and for the rotatable disk 11 of round hole, the key hole that has corresponding with key body surface is opened at the disk center, disk 11 and round hole between realize through the cooperation of slider and guide way that disk 11 is in the limited rotatable of round hole internal angle, this embodiment adopts to open guide way 14 on the disk, can follow the limited circular motion's of guide way angle slider 13 an organic whole and connect on the round hole wall, of course adopts to establish the slider on the disk, opens the setting of guide way in the round hole, and its principle and effect are all the same. The calibration piece unit plays a role in calibrating the initial position of the key body, enables the key body to be prevented from shaking in the key channel, and guarantees the center consistency of the key body and the key channel.

Wherein, the rotation limiting blades comprise a lower rotation limiting blade 51 which is matched with the right deep tooth socket to form a rotation limiting verification structure and an upper rotation limiting blade 52 which is matched with the left deep tooth socket to form a rotation limiting verification structure, the width of the deep tooth socket corresponds to the thickness of the lower rotation limiting blade 51 and the upper rotation limiting blade 52, the slotted hole of the rotation limiting blade comprises a hole-shaped insertion hole 5-1 which corresponds to the outer surface of the key body 22, an extension arc hole 5-2 communicated with the insertion hole 5-1 is formed by taking the concave bottom of the concave bottom on the lower surface of the insertion hole 5-1 corresponding to the middle shaft concave 2-4 as the center and extending from the opposite half side of the deep pressing groove of the insertion hole to the anticlockwise rotation direction of the key, the radius of the extension arc hole 5-2 is half of the maximum width of the key body, and the width of the communication between the insertion hole 5-1 and the extension arc hole 5-2 is larger than half of the maximum width of the key body.

The lower limit rotating blade 51 has an extension arc hole 5-2 extending from the lower half of the insertion hole 5-1 with a hole shape corresponding to the outer surface of the key body 2-2 to the counterclockwise rotation direction defined by the key, so that a rotation limit convex top 5-3 facing to the concave bottom of the inner concave and close to the concave bottom is formed on the lower limit rotating blade, and the rotation limit convex top 5-3 is in circular arc transition to leave a counterclockwise rotation space at the position of the wavy central axis of the key body. When the key body 2-2 is unlocked by matching with the lock body, the left deep tooth socket can radially rotate anticlockwise relative to the lower limit rotating blade at the position of the lower limit rotating blade 51 insertion hole and is not limited, the key body section where the left deep tooth socket is located can radially rotate anticlockwise around the key body central shaft in the extension arc hole 5-2 of the lower limit rotating blade 51 for limiting an angle to be unlocked in a reversing mode, and the left deep tooth socket 2-5 of the key body realizes the matching identification of the slotted hole of the lower limit rotating blade 5 in the key channel at the position on the key body.

The extending arc hole 5-2 of the upper limit rotating blade 52 extends from the upper side of the insertion hole 5-1 with the hole shape corresponding to the outer surface of the key body 2-2 to the anticlockwise rotating direction limited by the key, and the extending arc hole of the upper limit rotating blade is in a sector shape. When the key body 2-2 is unlocked by matching with the lock body, the right deep tooth socket can radially rotate anticlockwise and is not limited relative to the upper limit rotating blade at the position of the insertion hole of the upper limit rotating blade 52, the key body section where the right deep tooth socket is located can radially rotate anticlockwise around the central shaft of the key body in the fan-shaped extension arc hole of the upper limit rotating blade 52 for limiting the angle to be unlocked in a reversing mode, and the right deep tooth socket 2-5 of the key body realizes the matching identification of the slotted hole of the upper limit rotating blade 52 to the key body at the position in the key channel.

The arc angle of the extending arc hole of the lower rotating blade 51 and the arc angle of the fan-shaped extending arc hole of the upper rotating blade 52, namely the key body section where the deep tooth socket is located, can be radially and anticlockwise rotated downwards to be limited to 90-135 degrees, the thickness of the key can be considered in the angle range, and meanwhile, the enough reversing angle is ensured, so that the locking assembly moves in place.

The locking subassembly including the lock plate 6 of taking the lock tongue end, be used for making 6 lock tongue ends of lock plate keep extending the locking spring 7 of lockhole 10 outward, this embodiment is that the U type lock is two lockhole structures, adopts two lock plate settings admittedly, also can set up to single lock plate setting as required certainly. Two locking pieces 6 of this embodiment are relative left locking piece and the right locking piece that sets up about being respectively, locking spring 7 butt between left locking piece and right locking piece. Left side locking piece and right locking piece are in left and right sides direction upper portion crisscross and the upper and lower relative edge of crisscross section is opened lacks the tooth, and the limited hole 8 is formed relative up and down to the lack tooth on this double-phase opposite side. The left locking piece and the right locking piece are provided with teeth, each tooth comprises a positioning convex ridge 6-1 protruding towards the opposite surface and a pushing valley 6-2 respectively positioned at the left side and the right side of the positioning convex ridge 6-1, and a limiting hole 8 corresponding to the front end of the key body 2-2 is formed by enclosing the two positioning convex ridges 6-1 and the pushing valleys 6-2 which are oppositely arranged. The center of the top end of the key body 2-2 is provided with an inner groove 2-6 which is concave towards the length direction of the key, the bottom of the inner groove 2-6 is positioned on a wave middle shaft, so that two driving convex parts 2-7 matched with a limiting hole 8 are respectively formed on the left side and the right side of the inner groove 2-6 at the front end of the key body, the two driving convex parts 2-7 at the front top end of the key are far away from the middle shaft, the distance between the two driving convex parts is larger than the vertical distance between the highest point and the lowest point of the key body 2-2 in the thickness direction, and a knob part which can act between a left locking piece and a right locking piece and can deform the limiting hole is formed at the front end of the key body 2-2 before and after the key is reversed. The driving convex parts 2-7 comprise locking free positions and reversing unlocking positions in the limiting holes 8, the lock body locking state is realized when the lock tongue end of the locking piece 6 extends outwards, the limiting holes 8 are aligned with the key channel, the two positioning convex ridges 6-1 on the left locking piece and the right locking piece are relatively close to each other up and down to form a discontinuous or continuous central positioning column, and the central positioning column can also play a role in preventing a universal key from being inserted into the direct-drive locking piece. The key passes through the key channel, two driving convex parts 2-7 with transverse intervals at the front end are inserted into the limiting hole 8 to be free from stress, namely the driving convex parts 2-7 are in locking free positions in the limiting hole 8, meanwhile, the central positioning column is clamped in the inner grooves 2-6 and correspondingly matched with the inner grooves 2-6, the central position is calibrated, and the insertion depth of the key is limited. If the key body is matched with the lock body, namely the key body rotates anticlockwise in the key channel for reversing, the two driving convex parts 2-7 rotate anticlockwise in the limiting hole 8 to a vertical reversing unlocking position, the two driving convex parts 2-7 are in the function of a knob piece, the outer side surfaces of the two driving convex parts 2-7 in the width direction are propped against the inner wall of the limiting hole, after overcoming the elasticity of the locking spring 7, the key body is rotated to two driving convex parts of the key body to reversely expand the limiting hole in the width direction, the left locking sheet and the right locking sheet move inwards left and right, the spring bolt end of the locking sheet is retracted and is not exposed out of the lock hole, the key realizes the mechanical unlocking of the locking assembly, when the key rotates clockwise to the transverse locking position, the two driving convex parts 2-7 release acting force on the limiting hole, the left locking piece and the right locking piece automatically reset to the locking state under the acting force of the locking spring, and the bolt ends at the two ends extend into the corresponding lock holes.

The lock directly adopts the key to drive the locking component to unlock, and has no lock core, no marble and no insert spring. The lock requires that the key is not only discontinuous along the central axis in the length direction, so that the key is effectively used universally and the technical unlocking is prevented.

Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited thereto, and various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims (10)

1. The utility model provides a prevent tool to lock that technique was opened, includes lock shell (1), arranges lock body, supporting key (2) of key hole in lock shell (1) in, key (2) include handle portion (2-1), extend forward and both sides or unilateral open key body (2-2) that have a plurality of alveolus to form the tartar, its characterized in that: the lock body is internally provided with an axial blade groove (3), a plurality of blade units are stacked in the blade groove (3) in a row combination mode, the center of each blade unit is provided with a slotted hole for a key body to pass through, the slotted holes of the blade units are stacked to form a key passage correspondingly matched with the tooth grooves, namely the lock body judges the adaptation condition of the key through the clockwise or anticlockwise rotation reversing relation of the slotted hole of the blade unit to the key body at the position in the key passage; the key is characterized in that the center of the key body (2-2) is provided with a wave middle shaft which is formed by punching upwards in equal thickness, namely the wave middle shaft is provided with a middle shaft bulge (2-3) on the upper surface of the center of the key body, the lower surface of the wave middle shaft on the center of the key body is provided with a middle shaft indent (2-4), a tooth socket on the key body (2-2) comprises at least one deep tooth socket (2-5) which is transversely grooved, the depth of the deep tooth socket (2-5) is more than half of the maximum width of the key body, namely the deep tooth socket (2-5) penetrates through the center shaft of the key body, and the bottom of the deep tooth socket (2-5) is positioned; the blade unit comprises a rotation limiting blade (5) correspondingly matched with a deep tooth socket (2-5), the thickness of the rotation limiting blade (5) corresponds to or is smaller than the width of the deep tooth socket, a slotted hole of the rotation limiting blade comprises an insertion hole (51) which corresponds to the appearance of a key body (22) in a hole shape, an extension arc hole (5-2) which extends from the opposite half side of a deep pressing groove arranged in the insertion hole by taking the concave bottom of the lower surface of the insertion hole (5-1) corresponding to the concave part (2-4) of the middle shaft as the center and is communicated with the insertion hole (5-1) from the limited rotating direction of the key, the radius of the extension arc hole (5-2) is half of the maximum width of the key body, the communication width of the insertion hole (5-1) and the extension arc hole (5-2) is larger than half of the maximum width of the key body, when the key body (2-2) is, the deep tooth groove can radially rotate relative to the rotation limiting blade at the insertion hole position without limitation, the key body section where the deep tooth groove is located can radially rotate around the central shaft of the key body in the extension arc hole (5-2) for limiting an angle to be unlocked in a reversing mode, and the deep tooth groove (2-5) of the key body is used for realizing the matching identification of the slotted hole of the rotation limiting blade (5) to the key body at the position in the key channel.

2. The technical tamper resistant lock according to claim 1, wherein: the middle part of the top end of the key body (2-2) is provided with an inner groove (2-6) which is concave towards the length direction of the key, so that a driving convex part (27) is formed at the front top end of the key body (2-2), the foremost end of a key channel in the lock shell is provided with a locking assembly which is directly driven by a key machine to control unlocking, the locking assembly comprises a locking sheet (6) with a locking tongue end and a locking spring (7) used for enabling the locking tongue end of the locking sheet (6) to keep extending, and the locking sheet (6) is provided with a limiting hole (8) for the insertion of the driving convex part (2-7) and the rotatable matching of the driving convex part (2-7) to realize the telescopic action of the locking sheet (; the driving convex parts (2-7) comprise locking free positions and reversing unlocking positions in the limiting hole (8), a lock body is in a locking state when the lock tongue end of the locking piece (6) extends outwards, the limiting hole (8) is aligned with a key channel, a key passes through the key channel, the driving convex parts (2-7) at the front end are inserted into the limiting hole (8) freely without stress, and the driving convex parts (2-7) are in the locking free positions in the limiting hole (8); if the key body is matched with the lock body, namely the key body can rotate clockwise or anticlockwise in the key channel for reversing, the driving convex parts (2-7) rotate to the reversing unlocking position in the limiting hole (8), the surfaces of the driving convex parts (2-7) at the front end of the key abut against the corresponding inner wall of the limiting hole (8) to enable the locking piece (6) to overcome the elastic force of the locking spring (7) to move inwards, the lock tongue end retracts, and the mechanical unlocking of the locking assembly by the key is realized.

3. The technical tamper resistant lock according to claim 2, wherein: the locking piece (6) of the locking assembly comprises a left locking piece and a right locking piece which are oppositely arranged up and down, the left locking piece and the right locking piece are partially staggered in the left-right direction, the upper opposite side and the lower opposite side of the staggered section are provided with missing teeth, the missing teeth on the two opposite sides are oppositely formed into a limiting hole (8) up and down, and the locking spring (7) is abutted between the left locking piece and the right locking piece; in a locked state of the lock body, the left locking piece and the right locking piece are respectively expanded outwards under the elastic force action of the locking spring (7), so that two lock tongue ends of the left locking piece and the right locking piece extend outwards; during unlocking, the driving convex part rotates to the reversing unlocking position from the locking free position in the limiting hole, so that the left locking piece and the right locking piece overcome the elastic force of the locking spring (7) and move leftwards and rightwards inwards, and the two lock tongue ends of the left locking piece and the right locking piece retract to realize unlocking.

4. The technical tamper resistant lock according to claim 3, wherein: the inner groove (11) is arranged at the center of the front end of the key body, the bottoms of the inner grooves (2-6) are positioned on the wave middle shaft, thereby two driving convex parts (2-7) matched with the limiting hole (8) are respectively formed at the left side and the right side of the inner groove (2-6) at the front end of the key body, the distance between the two driving convex parts is larger than the vertical distance between the highest point and the lowest point of the key body (2-2) in the thickness direction, in the process of rotating from the locking free position to the reversing unlocking position, the outer side surfaces of the two driving convex parts (2-7) in the width direction are propped against and act on the inner wall of the limiting hole, after overcoming the elasticity of the locking spring (7), the key body is turned to the width direction of the two driving convex parts to open the limiting holes, so that the left locking plate and the right locking plate move left and right inwards, and the spring bolt end of the locking plate is retracted to unlock the lock body.

5. The technical tamper resistant lock according to claim 4, wherein: the missing teeth on the left locking piece and the right locking piece comprise positioning convex ridges (6-1) protruding towards the opposite surfaces and abutting push valleys (6-2) respectively positioned at the left side and the right side of the positioning convex ridges (6-1), and limit holes corresponding to the front end of the key body (2-2) are formed by enclosing the two positioning convex ridges (6-1) and the abutting push valleys (6-2) which are oppositely arranged, when the lock body is in a locking state, the two positioning convex ridges (6-1) on the left locking piece and the right locking piece are relatively close to each other up and down to form a discontinuous or continuous central positioning column, the key body is inserted into the key channel, when the two driving convex parts (2-7) are inserted into the limiting holes, the central positioning column is clamped and embedded in the inner grooves (2-6), in corresponding cooperation with the inner grooves (2-6), the centre position is calibrated and the depth of insertion of the key is limited.

6. The technical opening prevention lock according to claim 1 or 2 or 3 or 4 or 5, characterized in that: the rotation limiting blade (5) is a lower rotation limiting blade, an extension arc hole (5-2) of the lower rotation limiting blade extends from the lower half of an insertion hole (5-1) with a hole shape corresponding to the appearance of the key body (2-2) to the rotation limiting direction of the key, so that a rotation limiting convex top (5-3) facing to the concave bottom and close to the concave bottom is formed on the lower rotation limiting blade, and the key body section where the deep tooth socket is located can rotate downwards in the radial direction by a limited angle, namely the arc angle of the extension arc hole (52) is 90-135 degrees.

7. The technical opening prevention lock according to claim 1 or 2 or 3 or 4 or 5, characterized in that: the rotation limiting blade (5) is an upper rotation limiting blade, an extension arc hole (5-2) of the upper rotation limiting blade extends from the upper side of an insertion hole (5-1) with a hole shape corresponding to the appearance of the key body (2-2) to the rotation limiting direction of the key, the extension arc hole of the upper rotation limiting blade is fan-shaped, and the key body section with the deep tooth socket can rotate in the radial direction by a limited angle, namely the arc angle of the extension arc hole (5-2) is 90-135 degrees.

8. The technical opening prevention lock according to claim 1 or 2 or 3 or 4 or 5, characterized in that: the blade unit including arranging the gate of key passageway in and be used for calibrating key deepest initial position and restriction key passageway turned angle's calibration piece unit, the calibration piece unit includes that the center opens big calibration piece (9) that have the round hole, inlays and establishes in the round hole and for the rotatable disk (11) of round hole, the key hole that corresponds with key body surface is opened at the small circle piece center, small circle piece (11) and round hole between realize through the cooperation of slider with the guide way that disk (11) are at the restricted rotation of round hole internal angle.

9. The technical tamper resistant lock according to claim 6, wherein: the blade unit including arranging the gate of key passageway in and be used for calibrating key deepest initial position and restriction key passageway turned angle's calibration piece unit, the calibration piece unit includes that the center opens big calibration piece (9) that have the round hole, inlays and establishes in the round hole and for the rotatable disk (11) of round hole, the key hole that corresponds with key body surface is opened at the small circle piece center, small circle piece (11) and round hole between realize through the cooperation of slider with the guide way that disk (11) are at the restricted rotation of round hole internal angle.

10. The technical tamper resistant lock according to claim 7, wherein: the blade unit including arranging the gate of key passageway in and be used for calibrating key deepest initial position and restriction key passageway turned angle's calibration piece unit, the calibration piece unit includes that the center opens big calibration piece (9) that have the round hole, inlays and establishes in the round hole and for the rotatable disk (11) of round hole, the key hole that corresponds with key body surface is opened at the small circle piece center, small circle piece (11) and round hole between realize through the cooperation of slider with the guide way that disk (11) are at the restricted rotation of round hole internal angle.

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