CN104631922A - Idle lock and key matched with same - Google Patents

Abstract

The present invention discloses an idle lock, comprising: a lock shell, a lock core, a blade group and a lock pin. The idle lock adopts the above technical solution, and the key channel of the idle lock is cylindrical. When a foreign object is inserted into the keyhole, the lock core cannot be rotated even by force because no leverage point can be found. Moreover, the lock directly uses the second blade in the blade group as a key component to rotate the lock core. When all the blades of the blade group do not reach the appropriate position, the lock pin accommodating groove will not be formed, and the lock pin will not enter the lock pin accommodating groove. At this time, the blade group can rotate freely, but the lock core cannot rotate. Therefore, it is impossible to use a tool to forcibly twist the lock core to cause devastating damage to the blade group inside the lock, thereby effectively preventing violent opening.

Description

Freewheel lock and its matching key

technical field

The invention relates to a lockset, in particular to an idle lock and a key matched therewith.

Background technique

Locks are common anti-theft tools. The tumbler lock is widely used because of its simple structure and practicality. The structure of the pin lock is roughly the same, that is, a group of cylindrical pins are installed in the pin hole of the lock cylinder, and the key has a corresponding depth of teeth. The method of unlocking is roughly the same, that is, the corresponding pins are moved up and down according to the height of the key teeth, so that the height of each lock cylinder pin is at the interface between the lock case and the lock core, and then the key is rotated to drive the lock core. , to achieve the purpose of unlocking. This type of lock is located in the shifting tooth channel. Without touching the pin, foreign matter can easily enter the inner end of the keyhole, and various unlocking tools can be inserted through the shifting tooth channel for technical unlocking. Simultaneously, this kind of structure wastes the effective stroke of the marbles, makes the amount of key encryption of the lock set smaller, is easy to be opened by a locksmith, and has poor security.

In view of the above defects, people have developed blade locks. The principle of the blade lock is to use different tooth patterns on the key to align the different blades in the lock cylinder, so as to realize the rotation and opening of the lock cylinder. Chinese patents 200810031948.8, 201020682555.6, and 200920303724.8 all disclose blade locks with anti-theft functions. However, the keyholes of these leaf locks are mostly straight or cross-shaped. Usually, tools can be used to forcibly twist the lock cylinder, causing devastating damage to the inside of the lock, thereby opening it violently.

Contents of the invention

It is an object of the present invention to provide a lost motion lock. Another object of the present invention is to provide a key that cooperates with the deadbolt lock.

According to one aspect of the present invention, there is provided a dead-running lock comprising:

A lock case, the lock case is provided with a lock cylinder hole in the axial direction, and the side wall of the lock cylinder hole is provided with a lock pin groove;

The lock core is sleeved in the lock core hole and can rotate relative to the lock shell. One end of the lock core is provided with a key hole, the lock core is provided with a blade hole along the axial direction, and the lock core is also provided with a lock pin hole penetrating the side wall of the lock core. , the lock pin hole corresponds to the lock pin groove;

The blade group is arranged in the blade hole, the central part of the blade group is provided with a key channel, the key channel corresponds to the key hole, the blade group includes blades and spacers arranged at intervals, and the inner edge of the blade is provided with a tooth extending to the key channel, The blades include one or more first blades and one second blade. The outer edge of the first blade and the outer edge of the second blade are respectively provided with a first blade groove and a second blade groove. The side edge has a smooth transition zone, and the two side edges of the second vane groove along the radial direction of the vane group are perpendicular to the plane where the bottom of the second vane groove is located. slot;

The lock pin is arranged in the lock pin hole, the shape of the lock pin near the blade set corresponds to the lock pin accommodating groove, and the part of the lock pin opposite to the first blade has a smooth transition portion.

With the idle lock of the above technical solution, the key is inserted from the key hole of the lock core and passes through the key channel of the blade group. Insert the key directly into the bottom of the keyway so that the teeth of the key correspond to the teeth. At this time, the key is turned, and the tooth flower acts on the shifting teeth, so that the blade rotates together with the key. When the vane turns to a proper position, the first vane slot and the second vane slot are aligned with each other to form a locking pin accommodating slot. The lock pin enters the lock pin accommodating groove downwards, and now the lock pin leaves the lock pin groove, and its upper end surface enters the lock pin hole. The lock pin falls into the lock pin accommodating groove and matches with it, and the part of the lock pin without smooth transition enters the second blade groove. Continue to turn the key, the second blade groove blocks the lock pin and makes it rotate together with the second blade, and the lock pin drives the lock core to finally make the lock core rotate, so that the idle lock is opened. When it is necessary to lock the idling lock, the key is withdrawn outwards by a distance equivalent to the thickness of one blade, so that the position of the tooth flower corresponds to the adjacent other shifting teeth, especially the shifting teeth of the second blade. The corresponding tooth flower leaves the position of the second blade; then turn the key, because the tooth flower corresponding to the shifting tooth of the second blade leaves the position of the second blade, the first blade rotates first, and the first blade Both the transition zone and the transition portion of the lock pin are designed smoothly, which can convert the tangential torque force when the first blade rotates into an outward thrust, thereby pushing the lock pin outward into the lock pin slot. After the lock pin enters the lock pin groove, it leaves the lock pin accommodation groove completely. As the key continues to rotate, the positions of the first blade grooves are mutually staggered, and the lock pin accommodation groove disappears. At this time, the lock pin is stuck between the lock casing and the lock cylinder, the lock cylinder cannot rotate, and the idle lock is closed. The key passage of the idle lock is cylindrical, and when a foreign matter is inserted into the keyhole, the lock core cannot be rotated even if violence is used because the point of leverage cannot be found. Moreover, the lock directly uses the second blade in the blade group as the key component to rotate the lock cylinder. When all the blades of the blade group do not reach the proper position, the lock pin accommodation groove will not be formed, and the lock pin will not enter the lock. In the pin accommodating groove, the blade group can rotate freely at this time, but the lock cylinder cannot rotate. Therefore, it is impossible to forcibly twist the lock cylinder with a tool, so that the blade group inside the lock is destroyed, thereby effectively preventing violent opening.

In some embodiments, a detent hole is provided on the side wall of the lock housing away from the lock cylinder, and a detent spring set is provided in the detent hole. The detent spring set includes a detent pin and a detent spring. The locking pin is in contact with each other, and the two ends of the depressing spring are respectively connected with the depressing groove and the depressing pin pellets. The depressing pin spring group can press the locking pin to the locking pin hole, thereby preventing the locking pin from being stuck and unable to enter the locking pin hole.

In some embodiments, the spacer is provided with a spacer groove, and the shape of the spacer groove is the same as that of the first vane groove. As a result, the lock pin accommodating groove formed by the blade group is smoother, and the lock pin moves more smoothly.

In some embodiments, the second blade is disposed at an end of the blade set away from the keyhole. Therefore, when the idling lock is locked, the shifting teeth can be prevented from touching the second blade so that the lock pin cannot leave the lock pin accommodating groove.

In some embodiments, the first vane and/or the second vane are provided with dummy vane grooves. The pseudo-blade groove can confuse the unlocker, making it impossible to accurately judge the exact position of the first blade groove or the second blade groove, thereby effectively preventing technical unlocking.

In some embodiments, the outer wall of the lock cylinder is provided with a lock cylinder positioning hole, the lock housing is provided with a positioning hole, the positioning hole corresponds to the positioning hole, and a positioning spring group is provided in the positioning hole, and the positioning spring group includes The fixed core pin and the fixed core spring, the two ends of the fixed core spring are respectively connected with the fixed core hole and the fixed core pin. When locking, the lock cylinder first rotates with the key. When it is turned to a suitable position, the lock pin hole corresponds to the lock pin groove. Relative rotation occurs between the first blade of the blade set and the lock core, and then the lock pin is pushed out of the lock pin accommodating groove.

In some embodiments, the outer wall of the lock cylinder is provided with a key positioning hole, and a key positioning hole is provided with a fixed key spring set, the fixed key spring set includes a fixed key pin and a fixed key spring, and one end of the fixed key pin is connected to the fixed key spring. The other end stretches into the key hole, and the two ends of the fixed key spring are connected with the key positioning hole and the fixed key pins respectively. When locking, pull out the key backwards, so that the pin of the fixed key enters the annular positioning groove set on the key. At this time, the key just retreats outward by a distance of one blade, so that the position of the tooth flower is respectively the same as that of the other adjacent shifting tooth. Correspondingly, especially make the teeth flower corresponding to the shifting tooth of the second blade leave the position of the second blade.

In some embodiments, a key ejecting device is further provided in the lock cylinder, and the key ejecting device can eject the key out of the key hole by at least a distance equivalent to the thickness of one blade. Therefore, when locking, the key can automatically pop out the distance of one blade, so that the positions of the teeth are respectively corresponding to the adjacent other teeth, especially the teeth corresponding to the teeth of the second blade are separated from the second blade. s position.

In some embodiments, a secondary lock pin is also included, and the secondary lock pin is arranged between the lock pin and the pin pin. The auxiliary lock pin can be used to stir the dead bolt matched with the idle lock. Therefore, the application range of the idle lock is wider. And because there is the existence of secondary lock pin, even if adopt abnormal means to make lock core rotate, also can not necessarily be able to open this idler lock, further enhanced the safety factor of this idler lock.

According to one aspect of the present invention, there is provided a key that matches the idle lock, including a key body and a key handle. There is an annular positioning groove. The pins of the fixed key can enter the annular positioning groove provided on the key. Teeth can be arranged along the outer edge of the key body, which can greatly increase the density of the key.

Description of drawings

Fig. 1 is a structural schematic diagram of a dead-running lock according to an embodiment of the present invention.

Fig. 2 is a bottom view of the lock pin of the idle lock shown in Fig. 1 .

Fig. 3 is an A-A sectional view of the lock pin shown in Fig. 2 .

Fig. 4 is a B-B sectional view of the lock pin shown in Fig. 2 .

Fig. 5 is a schematic structural view of the blades of the idle lock shown in Fig. 1 .

Fig. 6 is a structural schematic diagram of a spacer of the idle lock shown in Fig. 1 .

Fig. 7 is a cross-sectional view of the idle lock shown in Fig. 1 .

Fig. 8 is a schematic structural diagram of a key according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of a blade of a dead-running lock according to another embodiment of the present invention.

Fig. 10 is a cross-sectional view of another embodiment of the idle lock of the present invention.

Fig. 11 is a cross-sectional view of another embodiment of the idle lock of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Example 1

1 to 7 schematically show a dead-running lock according to an embodiment of the present invention. As shown in the figure, the device includes a lock case 1 , a lock cylinder 2 , a blade set 3 and a lock pin 4 .

The lock housing 1 is provided with a lock cylinder hole 11 along the axial direction, and the side wall of the lock cylinder hole 11 is provided with a lock pin groove 12 . The lock case 1 is provided with a panel 6 . The panel 6 is fixedly connected with the lock case 1 . The panel 6 is provided with a circular through hole 61 .

The lock core 2 is sheathed in the lock core hole 11 and can rotate relative to the lock case 1 . One end of the lock cylinder 2 is provided with a sealing piece 5 . The center of the cover sheet 5 is provided with a key hole 21 . The lock cylinder 2 is provided with blade holes 22 along the axial direction. The sealing piece 5 is installed in the blade hole 22 and is fixed and integrated with the lock cylinder 2 . The lock core 2 is also provided with a lock pin hole 23 passing through its side wall. The lock pin hole 23 corresponds to the lock pin slot 12 . The through hole 61 corresponds to the key hole 21 .

The vane set 3 is disposed in the vane hole 22 . The central part of the blade set 3 is provided with a key channel 31 . The keyway 31 corresponds to the keyhole 21 . The vane set 3 includes vanes 32 and spacers 33 arranged at intervals. The inner edge of the blade 32 is provided with a shifting tooth 35 extending toward the key passage 31, and the blade 32 includes one or more first blades 321 and one second blade 322, wherein the second blade 322 is arranged at the end of the blade group 3 away from the key hole 21 . The outer edge of the first blade 321 and the outer edge of the second blade 322 are respectively provided with a first blade groove 321a and a second blade groove 322a. The first vane groove 321a has a smooth transition zone 321b along the radial sides of the blade set 3, and the second vane groove 322a along the radial sides of the blade set 3 is perpendicular to the plane where the bottom of the second vane groove 322 is located. , when the first vane slot 321a and the second vane slot 322a are aligned, the locking pin accommodating slot 34 is formed. The spacer 33 is provided with a spacer groove 33a, and the shape of the spacer groove 33a is the same as that of the first vane groove 321a.

The lock pin 4 is arranged in the lock pin hole 23 . The shape of the lock pin 4 on the side close to the blade set 3 corresponds to the lock pin accommodating groove 34 . The portion of the lock pin 4 opposite to the first blade 321 has a smooth transition portion 4b.

A pin hole 13 is provided on the side wall of the lock case 1 away from the lock cylinder 2 . A depressor spring assembly 14 is arranged in the depressor hole 13 . The depressing spring assembly 14 includes a depressing pin 141 and a depressing spring 142 . The pressing pin pin 141 abuts against the lock pin 4 . Both ends of the depressing spring 142 are respectively connected with the depressing groove 13 and the depressing pin 141 . The depressing pin spring assembly 14 can press the locking pin 4 to the locking pin hole 23 , thereby preventing the locking pin 4 from being stuck and unable to enter the locking pin hole 23 .

The outer wall of the lock core 2 is provided with a lock core positioning hole 24 , and the lock housing 1 is provided with a core positioning hole 15 , and the core positioning hole 24 corresponds to the positioning hole 15 . The core-fixing hole 15 is provided with a core-fixing spring assembly 16 . The centering spring assembly 16 includes a centering pin 161 and a centering spring 162 . Both ends of the centering spring 162 are respectively connected with the centering hole 15 and the centering pin 161 . When locking, the lock cylinder 2 first rotates with the key. When it is turned to a suitable position, the lock pin hole 23 corresponds to the lock pin groove 12. At this time, the fixed core pin 161 enters the lock core positioning hole 24, and the lock core 2 rotates. The resistance increases, so that the relative rotation between the first blade 321 of the blade set 3 and the lock cylinder 2 occurs, and then the lock pin 4 is pushed out of the lock pin accommodating groove 23 .

The outer wall of the lock cylinder 2 is provided with a key positioning hole 25, and the key positioning hole 25 is provided with a fixed key spring assembly 26. The fixed key spring assembly 26 includes a fixed key pin 261 and a fixed key spring 262 . One end of the fixed key pin 261 is connected with the fixed key spring 262, and the other end stretches into the keyhole 21. The two ends of the fixed key spring 262 are connected with the key positioning hole 25 and the fixed key pin 261 respectively. When locking, pull out the key backwards, so that the fixed key pin 261 enters the annular positioning groove provided on the key. At this time, the key just withdraws from the distance of one blade outward, so that the position of the tooth flower is respectively the same as that of the adjacent another dial. Corresponding to the teeth, especially the teeth flower corresponding to the shifting tooth of the second blade leaves the position of the second blade.

With the idle lock of the above technical solution, the key is inserted from the through hole 61 of the panel 6 through the key hole 21 of the lock cylinder 1 and passes through the key channel 31 of the blade set 3 . The key is directly inserted into the bottom of the key channel 31, so that the position of the teeth of the key corresponds to the shifting tooth 35. At this moment, the key is turned, and the tooth flower acts on the shifting tooth 35, so that the blade 32 is rotated together with the key. When the vane 32 rotates to a proper position, the first vane slot 321 a and the second vane slot 322 a are aligned with each other to form the locking pin accommodating slot 34 . The lock pin 4 enters the lock pin accommodating groove 34 under the action of the pressing pin spring group 14 , at this moment the lock pin 4 leaves the lock pin groove 12 , and its upper end surface enters the lock pin hole 23 . The lock pin 4 falls into the lock pin accommodating groove 34 and matches therewith, and the part of the lock pin 4 without a smooth transition enters the second blade groove 322a. Continue to turn the key, the second blade groove 322a clamps the lock pin 4 to make it rotate together with the second blade 322, the lock pin 4 drives the lock core 2, finally makes the lock core 2 rotate, thereby opening the idle lock. When the idling lock needs to be locked, the key is first withdrawn outwards by a distance equivalent to the thickness of a blade, so that the positions of the teeth are respectively corresponding to the adjacent another shifting tooth 35, especially the second blade 322. The tooth flower corresponding to the shift tooth 35 leaves the position of the second blade 322, and then the key is turned, because the tooth flower corresponding to the shift tooth 35 of the second blade 322 leaves the position of the second leaf 322, the first blade now 321 rotates first, and the transition zone 321b of the first blade 321 and the transition portion 4b of the lock pin 4 are both designed smoothly, which can convert the tangential torque force when the first blade 321 rotates into an outward thrust, thereby The lock pin 4 pushes the lock pin slot 12 outward. After the lock pin 4 enters the lock pin groove 12, it completely leaves the lock pin accommodating groove 34. As the key continues to turn, the positions of the first blade grooves 321 are staggered from each other, and the lock pin accommodating groove 34 disappears. At this time, the lock pin 4 is stuck between the lock case 1 and the lock core 2, the lock core 2 cannot rotate, and the idle lock is locked.

In other embodiments, the second vanes 322 may also be arranged at other positions of the vane set 3 .

Example 2

Figure 8 schematically shows a key 9 according to an embodiment of the invention. As shown, the device includes a key body 91 and a key handle 92 . The key body 91 has a cylindrical shape, and an outer edge of the key body 91 is provided with a corkscrew 911 matching with the shifting tooth 35 . The key body 91 is also provided with an annular positioning groove 912 . The pins of the fixed key can enter the annular positioning groove provided on the key. The teeth pattern 911 can be arranged along the outer edge of the key body 91, thereby greatly increasing the security of the key.

Example 3

Figure 9 schematically shows a blade 32 of a dead wheel lock according to an embodiment of the invention. As shown, the blade 32 includes a first blade 321 and a second blade 322 . The difference from Embodiment 1 is that the first vane 321 and the second vane 322 not only have the first vane groove 321a and the second vane groove 322a, but also have three pseudo-vane grooves 36, wherein the pseudo-vane grooves 36 The shape is similar to the first vane groove 321a but the depth is shallower than the first vane groove 321a. The pseudo blade groove 36 can confuse the unlocker, making it impossible to accurately judge the exact position of the first blade groove 321a or the second blade groove 322a, thereby effectively preventing technical unlocking.

In other embodiments, one of the first vane 321 and the second vane 322 may not be provided with the dummy vane groove 36 . The number of pseudo-vane slots 36 on the first vane 321 or the second vane 322 may be one, two or more. The numbers of the pseudo-blade grooves 36 on the first blade 321 and the second blade 322 may be the same or different, and the shapes of the pseudo-blade grooves 36 on the two blades may be the same or different.

Example 4

Fig. 10 schematically shows a dead-running lock according to another embodiment of the present invention. The difference from Embodiment 1 is that a key ejecting device 17 is also provided in the lock cylinder 2 . In this embodiment, the key ejecting device 17 is arranged at the innermost end of the blade groove, and includes an ejecting spring 172 and an ejecting pin 171 . Wherein, two ends of the spring 172 are respectively connected with the lock cylinder 2 and the ejection pin 171 . One end of the ejection pin 171 extends into the key passage, and the other end is connected with the ejection spring 172 . The key ejecting device 17 can eject the key out of the keyhole by a distance equivalent to the thickness of a blade. Thus when locked, the key can automatically eject the distance of a blade under the effect of the key ejector 17, so that the position of the tooth flower is respectively corresponding to the adjacent another shifting tooth, especially the shifting tooth with the second blade Corresponding cork leaves the position of the second blade, and then turn the key at this time, because the cortex corresponding to the shifting tooth of the second vane leaves the position of the second vane, the first vane rotates first at this moment, and the first vane Both the transition zone and the transition part of the lock pin are designed smoothly, which can convert the tangential torque force when the first blade rotates into an outward thrust, thereby pushing the lock pin outward into the lock pin groove. After the lock pin enters the lock pin groove, it leaves the lock pin accommodation groove completely. As the key continues to rotate, the positions of the first blade grooves are mutually staggered, and the lock pin accommodation groove disappears. At this time, the lock pin is stuck between the lock housing 1 and the lock core 2, the lock core 2 cannot rotate, and the idle lock is locked.

In other embodiments, the key ejecting device 17 can also be arranged on the side wall of the keyhole.

Example 5

Fig. 11 schematically shows a dead-running lock according to yet another embodiment of the present invention. The difference from Embodiment 1 is that it also includes a secondary lock pin 7 , a bottom plate 8 and a lock tongue 82 . Wherein the auxiliary lock pin 7 is arranged between the lock pin 4 and the pressing pin 141 . The bottom plate 8 has a sleeve hole 81 at its center. Bottom plate 8 is fixed with lock shell 1. The locking tongue 82 is sheathed in the sleeve hole 81 . A locking groove 83 is provided on a side of the locking tongue 82 close to the secondary locking pin 7 . The locking slot 83 corresponds to the secondary lock pin 7 . When the lock pin 4 entered the lock pin accommodating groove, the auxiliary lock pin 7 left the lock pin groove and entered the lock pin hole. One end of the auxiliary locking pin 7 enters the engaging groove 83 . At this time, the key is turned, and the auxiliary lock pin 7 can drive the dead bolt 82 to rotate together, thereby realizing the opening of the lockset.

What have been described above are only some embodiments of the present invention. For those skilled in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention.

Claims (10)

1. racing lock, is characterized in that, comprising:

Lock housing, described lock housing is provided with lock core hole vertically, and described lock core hole sidewall is provided with lock pin groove;

Lock core, be sheathed in described lock core hole and also can rotate relative to described lock housing, one end of described lock core is provided with keyhole, and described lock core is provided with vane hole vertically, and described lock core is also provided with the lockpin hole running through lock core sidewall, and described lockpin hole is corresponding with described lock pin groove;

Vane group, be located in described vane hole, described vane group core is provided with key channel, described key channel is corresponding with described keyhole, described vane group comprises spaced blade and partition, described vane inside edge is provided with the moving tooth extended to described key channel, described blade comprises one or more first blade and second blade, described first blade outer rim and the second blade outer rim are respectively equipped with the first blade groove and the second blade groove, described first blade groove has level and smooth intermediate zone along the both sides of the edge of described vane group radial direction, described second blade groove is along the plane being perpendicular at the place, bottom of the both sides of the edge of described vane group radial direction and described second blade groove, lock pin storage tank is formed when described first blade groove and the alignment of the second blade groove,

Lock pin, is located in described lockpin hole, and the shape of described lock pin near described vane group side is corresponding with described lock pin storage tank, and the part that described lock pin is relative with the first blade has level and smooth transition part.

2. racing lock according to claim 1, it is characterized in that, described lock housing is provided with pad hole away from the sidewall of described lock core side, pad groups of springs is provided with in described pad hole, described pad groups of springs comprises pad pellet and pad spring, described pad pellet contacts mutually with described lock pin, and described pad both ends of the spring is connected with described pad groove and described pad pellet respectively.

3. racing lock according to claim 1, is characterized in that, described partition is provided with spacer slit, and the shape of described spacer slit is identical with described first blade groove.

4. racing lock according to claim 1, is characterized in that, described second blade is located at described vane group one end away from described keyhole.

5. the racing lock according to claim 1 or 2 or 3 or 4, is characterized in that, described first blade and/or described second blade are provided with plan blade groove.

6. racing lock according to claim 1, it is characterized in that, described lock core lateral wall is provided with lock core locating hole, described lock housing is provided with determines core bore, it is described that to determine core bore corresponding with described locating hole, described determine to be provided with in core bore determine core groups of springs, describedly determine core groups of springs and comprise and determine core pellet and determine core spring, describedly determine core both ends of the spring and determine core bore with described and describedly determine core pellet and be connected respectively.

7. racing lock according to claim 1, it is characterized in that, described lock core lateral wall is provided with key positioner hole, be provided with in described key positioner hole and determine spoon groups of springs, describedly determine spoon groups of springs and comprise and determine spoon pellet and determine spoon spring, describedly determine spoon pellet one end and determine spoon spring be connected with described, the other end stretches in described keyhole, describedly determines spoon both ends of the spring respectively with described key positioner hole with describedly determine spoon pellet and be connected.

8. racing lock according to claim 1, is characterized in that, is also provided with key liftout attachment in described lock core, and key phase keyhole at least can be ejected the distance of the thickness being equivalent to a blade outward by described key liftout attachment.

9. racing lock according to claim 2, is characterized in that, also comprises secondary lock pin, and described secondary lock pin is located between described lock pin and described pad pellet.

10. the key matched with the racing lock described in above-mentioned any one claim, it is characterized in that, described key comprises key body and the shank of the key, and described key body is cylindrical and its outer rim is provided with the tartar matched with described moving tooth, and key body is also provided with annular positioning groove.