DE102022102254B3 - Anti-theft structure composed of lock cylinder and key - Google Patents

Abstract

In the lock cylinder and key anti-theft structure according to the invention, the lock cylinder (2) consists of a lock cylinder seat (20), a lock cylinder housing (21), a sliding piece (22), a plurality of closing discs (23), a plurality of seals (24), a limiting piece (25 ), a positioning piece (26), an engaging rod (27), a stop plate (28), a compression spring (29), a positioning stopper (30) and a locking ring (31), with the sliding piece (22) in the on the inner bottom surface of the key cylinder body (21), a plurality of lock washers (23) and a plurality of gaskets (24) are stacked alternately in the key cylinder body (21), the restricting piece (25) and the positioning piece (26) at an outer end of the key cylinder body (21) are arranged and inserted together with this in the lock cylinder seat (20), the stop plate (28) is arranged in the receiving groove (202), d The compression spring (29) is arranged in the recess (204), the stop plate (28) is pressed by the compression spring (204), the positioning stop (30) is arranged on the underside of the lock cylinder housing (21), the locking ring (31) in the annular groove (205) of the lock cylinder seat (20) is engaged and a key (4) is provided with an annular groove (42). In this way, when the key (4) is not fully inserted to the inner bottom surface of the key cylinder case (21) or pulled out from the key cylinder (2), the locking discs (23) cannot be rotated, thus achieving an optimal anti-theft effect.

Description

field of invention

The present invention relates to a key cylinder-key anti-theft structure, and more particularly to a structure in which a pushing piece is disposed on the inner bottom surface of the key cylinder housing and a stopper plate is disposed in the key cylinder seat, whereby when the key is not fully inserted to the inner bottom surface of the key cylinder housing, the lock cylinder cannot be turned, thus achieving an optimal anti-theft effect, with a stop piece placed in the lock cylinder seat, which prevents the key from being turned unless it is fully extracted from the lock cylinder, so that the keyholes of those in the lock cylinder are blocked locking discs do not slip and thus the key can be easily inserted when the key is reinserted into the keyholes of the locking discs.

State of the art

It will be on the 1 and 2 referenced. The key cylinder structure of conventional folding locks is primarily provided with a key cylinder 1, the key cylinder 1 consisting of a key cylinder seat 10, a key cylinder housing 11, an engagement rod 12, a plurality of locking discs 13, a plurality of gaskets 14 and a positioning piece 15, the key cylinder seat 10 provided with a receiving chamber 100 is, the inner wall of the accommodating chamber 100 is provided with an insertion slot 101, an engaging rod 12 is engaged in the insertion slit 101, the key cylinder seat 10 is provided with a key insertion hole 102, the key cylinder housing 11 is arranged in the accommodating chamber 100 of the key cylinder seat 10, the wall of the Lock cylinder housing 11 is provided with a slot 110 and a gap 111, a part of the engagement rod 12 is engaged in the slot 110 of the lock cylinder housing 11, a plurality of locking discs 13 and seals 14 in the lock cylinder housing 10 alternately angeord net, each closing disk 13 is provided with a keyhole 130, an arcuate notch 131 is provided on the outer edge of each closing disk 13, a respective arcuate notch 131 serves to engage the engagement rod 12, further a projection 132 is provided on the outer edge of each closing disk 13, the projections 132 in the gap 111 of the key cylinder body 11, each gasket 14 is provided with a through hole 140, an arc notch 141 is provided on the outer edge of each gasket 14, a respective arc notch 141 is for engaging the engaging rod 12, and a flange 142 on the outer edge of each gasket 14 is provided, the flanges 142 are disposed in the gap 111 of the key cylinder body 11, the positioning piece 15 is disposed at one end of the key cylinder body 11 and provided with a keyhole 150, and a protruding body 151 is provided on two long sides corresponding to each other. Thus, the lock cylinder structure of a folding lock is formed. By inserting a key via the key insertion hole 102 of the lock cylinder seat 10 into the keyhole 150 of the positioning piece 15, the keyholes 130 of the lock washers 13 located in the lock cylinder housing 11 and the through holes 140 of the seals 14 located in the lock cylinder housing 11, the guide groove of the key can be aligned with the protruding bodies 151 of the positioning piece 15. After the slots provided on the two opposite walls of the key are aligned with the lock washers 13 and the seals 14, the key can be turned and drive the key cylinder housing 11 to rotate to perform unlocking and locking operations. However, if an incorrect key is inserted into the keyholes 130 of the locking discs 13 in the lock cylinder housing - 11, all locking discs 13 in the lock cylinder housing 11 can still be rotated ninety degrees (namely, the angle of the gap 111 of the lock cylinder housing 11). If the user does not fully insert the key to the inner bottom surface of the key cylinder body 11 or a thief uses an incorrect key and forcibly turns it, the keyholes 130 of the locking discs 13/the key are easily deformed or easily broken, which As a result, later the rotation caused by inserting the key into the lock cylinder cannot be carried out easily during the unlocking and locking process, and the anti-theft effect is thus impaired. Furthermore, the closing discs 13 in the lock cylinder housing 11 of a conventional folding lock slip due to vibrations generated by the vehicle while driving (as in 2 shown) so that the keyholes 130 of the lock washers 13 cannot be aligned with each other. When the key is to be reinserted into the keyholes 150, 130 of the locking discs 13, the key must be gently shaken and slowly inserted into the positioning piece 15 and the keyholes 150, 130 of the locking discs 13. After the positioning piece 15 and the keyholes 150, 130 of the lock washers 13 are fully aligned with each other, the key can be fully inserted to the inner bottom surface of the lock cylinder Linder housing 11 are inserted to rotate the lock cylinder housing 11 and thus achieve the goal of unlocking. So it is extremely troublesome to use the key to lock and unlock.

From the DE 601 13 404 T2 an impact-resistant locking device with a theft-proof cylinder core is known which has increased strength against external influences and which has a lock core device which provides an improved anti-theft effect. The locking device includes: a lock body formed with a lock core chamber, a lock core opening for accessing the lock core chamber, and a shackle insertion hole, the lock core chamber having a portion formed as a lock chamber adjacent to and communicating with the shackle insertion hole ; a lock core device accommodated in the lock core chamber via the lock core opening, the lock core device comprising a cylindrical and axially rotatable lock core provided with a latch member disposed in the lock chamber; a key insertable into the lock core assembly via the lock core opening and operable to rotate the lock core and the latch member between locking and unlocking positions; a shackle member having a leg portion formed with a shackle groove and inserted into the shackle insertion hole in the lock body; a locking member disposed in the locking chamber of the lock body, the locking member having a shackle engaging end portion for engaging the shackle groove in the leg portion of the shackle member and a latch engaging end portion opposite the shackle engaging end portion and engaging the latch member such that the locking member is movable between locking and unlocking positions when the latch member moves between the locking and unlocking positions, the shackle engaging end portion of the locking member extending into the shackle insertion hole for engagement with the shackle groove in the leg portion of the shackle member, when the locking member is in the locking position, the shackle engaging end portion for disengagement from the leg portion of the shackle member is retracted into the locking chamber to allow removal of the shackle member from the shackle insertion hole when the locking member is in the unlocked position indet, wherein the latch member has an end surface which is transverse to an axis of the lock core and is formed with a pin hole which is eccentric to the axis of the lock core, wherein the latch engaging end portion of the locking member is formed with a pin which extends to engage with the Latch member rotatably extends into the pin hole in the latch member. Here, the key has a shank portion with a cross-section formed as a sector of a circle and a handle portion connected to the shank portion, the shank portion having first and second radial surfaces extending along the length of the shank portion and a curved surface having the first and second radial surfaces, the first radial surface being planar and the second radial surface being formed with a plurality of blade portions disposed along the length of the shank portion, the blade portions having radial blade surfaces forming different angles with the first radial surface to set the code of the key, the shank portion of the key further having a distal end formed as an actuating tip portion.

The lock core assembly includes a lock case mounted in the lock core chamber of the lock body, the lock case having an inner surface defining a cylindrical chamber and formed with an axially extending lock groove, the lock core including: a cylindrical inner sleeve, rotatably received in the cylindrical chamber of the lock housing, the inner sleeve having a rear end attached to the latch member and a front end, the inner sleeve being formed with an axially extending locking slot registering with the locking groove is when the plug is in the locked position; a stack of annular strike plates received in the inner sleeve, each of the strike plates having an inner periphery defining a central hole, the central holes of the strike plates collectively defining a keyhole allowing insertion of the shank portion of the key therein, each of said striker plates further having an outer periphery formed with an engagement notch, said engagement notches of said striker plates being offset from one another according to the code of said key when said lock core is in said locking position, said engagement notches being sequentially aligned when said The lock core is in the unlocked position with the inner periphery of each of the striker plates being formed with a radially inward key engagement projection which abuts the key blade surface of a corresponding one of the key blade portions on the key , when the key is inserted into the keyhole and rotated, rotating the strike plates through different angles according to the code of the key to align the engagement cuts when the key enters the keyhole guided and rotated to move the plug to the unlocked position; a locking bar received in the locking slot of the inner sleeve, the misalignment of the engagement cuts on the locking plates allowing the outer peripheries of the locking plates to force the locking bar to extend into the locking groove in the lock housing to prevent rotation of the inner sleeve relative to the impede the lock case when the lock core is in the locked position, the alignment of the engagement cuts on the striker plates allowing the lock bar to disengage the lock groove and extend into the engagement cuts to prevent rotation of the inner sleeve relative to the lock case during unlocking movement of the lock core to allow; and an annular drive plate disposed in the inner sleeve at the rear end of the inner sleeve and between the striker plates and the latch member, the drive plate having an inner periphery defining a key engagement hole and formed with a key-operable projection, projecting radially and inwardly, the actuating tip portion of the key being extendable into engagement with the key-actuated projection into the key engagement hole to allow rotation of the drive plate with the key, the drive plate being formed with a drive projection, wherein the latch member has an operable portion driven by the drive projection such that rotation of the drive plate can result in corresponding rotation of the latch member between the locking and unlocking positions, and the lock cores device further comprises a spring-loaded tumbler unit, wherein the lock body is formed with a first tumbler hole, the inner sleeve is formed with a second tumbler hole, one of the striker plates is formed with a third tumbler hole and the first, second and third tumbler holes are closed prior to insertion of the key into the keyhole are aligned in sequence, wherein the tumbler assembly includes a first tumbler received in the first tumbler hole, a second tumbler received in the second tumbler hole, a third tumbler received in the third tumbler hole, and a first biasing spring for biasing the first, second and third tumblers to move inward to allow the first tumbler to protrude into the second tumbler hole in the inner sleeve to impede rotation of the inner sleeve relative to the lock body to allow the second tumbler into the d a third tumbler hole protrudes into the one of the striker plates to restrain the rotation of the one of the striker plates within the inner sleeve and to allow the third tumbler to project from the inner periphery of the one of the striker plates. The curved surface on the shank portion of the key is formed with a tumbler recess defined by a recessed tumbler press wall, the third tumbler element protruding into the tumbler recess when the key is inserted into the keyhole, the third tumbler element passing through the tumbler press wall in one direction is urged against the biasing action of the first biasing spring to retract the second tumbler into the second tumbler hole in the inner sleeve, thereby preventing the second tumbler from impeding rotation of the one of the striker plates relative to the inner sleeve, and to retract the first tumbler into the retracting the first tumbler hole such that the first tumbler ceases to impede rotation of the inner sleeve relative to the lock body.

The FR 2 757 557 A1 relates to a security lock having a cylinder, a security block sandwiched between a disc at the insertion end of a key and an end plate, and a cam, the lock having two detents extending in a plane parallel to the disc and with the perimeter of the cam work together. The detents are pivotable between a position in which they prevent rotation of the cam by cooperating with a notch of the lock and a position in which they enable rotation of the cam. The detents extend circumferentially around the driver in opposite directions, with the heads of the detents being aligned such that attempting to rotate the driver while the detents are in the locked position places one of the detents under tension acts on the driver and the other catch is under pressure.

object of the invention

It is the main object of the present invention to provide an anti-theft lock cylinder and key structure which can effectively eliminate the disadvantages involved in using conventional lock cylinders and keys.

• einen Schließzylinder, der einen Schließzylindersitz, ein Schließzylindergehäuse, ein Positionierungsstück und einen Eingriffsstab umfasst, wobei der Schließzylindersitz mit einer Aufnahmekammer und einem Schlüsseleinsteckloch versehen ist, die Innenwand der Aufnahmekammer mit einem Einschubschlitz versehen ist, das Schließzylindergehäuse in der Aufnahmekammer des Schließzylindersitzes angeordnet ist, die Wand des Schließzylindergehäuses mit einem Schlitz und einer Lücke versehen ist, mehrere Schließscheiben und mehrere Dichtungen abwechselnd im Schließzylindergehäuse gestapelt sind, jede Schließscheibe mit einem Schlüsselloch versehen ist, eine Bogenkerbe am Außenrand jeder Schließscheibe vorgesehen ist, ferner ein in der Lücke des Schließzylindergehäuses befindlicher Vorsprung am Außenrand jeder Schließscheibe vorgesehen ist, jede Dichtung mit einem Durchgangsloch versehen ist, eine Bogenkerbe am Außenrand jeder Dichtung vorgesehen ist, ferner ein in der Lücke des Schließzylindergehäuses befindlicher Flansch am Außenrand jeder Dichtung vorgesehen ist, das Positionierungsstück an einem Ende des Schließzylindergehäuses angeordnet und mit einem Schlüsselloch versehen ist und sich in der Aufnahmekammer des Schließzylindersitzes befindet, jeweils ein vorstehender Körper an zwei miteinander korrespondierenden langen Seiten des Schlüssellochs angeordnet ist und ein Teil des Eingriffsstabs in den Schlitz des Schließzylindergehäuses und somit in die Bogenkerben der Schließscheiben und der Dichtungen eingerastet ist und der andere Teil des Eingriffsstabs in den Einschubschlitz des Schließzylindersitzes eingerastet ist;
• einen Schlüssel, der zum Einstecken in den Schließzylinder dient, wobei jeweils eine Führungsnut an zwei gegenüberliegenden Wänden des Schlüssels vorgesehen ist, mehrere Zahnaussparungen an einer Wand des Schlüssels vorgesehen sind und eine jeweilige Zahnaussparung mit der Position der entsprechenden Schließscheibe des Schließzylinders korrespondiert;
• wobei die Wand der Aufnahmekammer des Schließzylindersitzes mit einer Aufnahmenut versehen ist, ein Achsloch auf einer Seite der Aufnahmenut und eine Ausnehmung auf der anderen Seite vorgesehen ist, ein Innenring der Aufnahmekammer des Schließzylindersitzes mit einer Ringnut versehen ist, die innere Bodenfläche des Schließzylindergehäuses mit einer Gleitausnehmung versehen ist, ein Loch in der Gleitausnehmung vorgesehen ist, ein Schiebestück in der Gleitausnehmung des Schließzylindergehäuses angeordnet und mit einem Durchgangsloch versehen ist; wobei ein Begrenzungsstück zwischen dem Schließzylindergehäuse und dem Positionierungsstück angeordnet und mit einem Schlüsselloch versehen ist und sich in der Aufnahmekammer des Schließzylindersitzes befindet, jeweils eine Bogenaussparung an zwei miteinander korrespondierenden langen Seiten des Schlüssellochs angeordnet ist, ein Vorsprung am Außenrand des Begrenzungsstücks vorgesehen und in den Einschubschlitz des Schließzylindersitzes eingerastet ist; wobei eine Stoppplatte in der Aufnahmenut des Schließzylindersitzes angeordnet ist, eine Seite der Stoppplatte mit einer Drehachse versehen ist, sich die Drehachse im Achsloch des Schließzylindersitzes befindet, eine Druckfeder in der Ausnehmung des Schließzylindersitzes angeordnet ist und gegen die Stoppplatte drückt, ein an der Unterseite des Schließzylindergehäuses befindlicher Positionieranschlag in der Aufnahmekammer des Schließzylindersitzes angeordnet und mit einer Durchgangsöffnung versehen ist, ein erster Anschlagkörper vorstehend an der mit dem Einschubschlitz des Schließzylindersitzes korrespondierenden Position des Positionieranschlags und ein zweiter Anschlagkörper vorstehend an der mit der Aufnahmenut und der Ausnehmung des Schließzylindersitzes korrespondierenden Position des Positionieranschlags angeordnet ist und ein Rastring an der Außenseite des Positionieranschlags angeordnet und in die Ringnut des Schließzylindersitzes eingerastet ist; wobei der Schlüssel mit einer Ringnut versehen ist und die Ringnut des Schlüssels mit der Position des im Schließzylinder befindlichen Begrenzungsstücks korrespondiert.

The lock cylinder and key anti-theft structure according to the invention comprises:

• a key cylinder comprising a key cylinder seat, a key cylinder housing, a positioning piece and an engagement rod, the key cylinder seat being provided with an accommodating chamber and a key insertion hole, the inner wall of the receiving chamber is provided with an insertion slot, the lock cylinder housing is arranged in the receiving chamber of the lock cylinder seat, the wall of the lock cylinder housing is provided with a slot and a gap, a plurality of locking discs and a plurality of gaskets are stacked alternately in the lock cylinder housing, each locking disc is provided with a keyhole, a an arcuate notch is provided on the outer edge of each locking disc, a projection located in the gap of the lock cylinder body is provided on the outer edge of each lock disc, each gasket is provided with a through hole, an arcuate notch is provided on the outer edge of each gasket, and a flange located in the gap of the lock cylinder housing is provided on the outer edge of each seal, the positioning piece is arranged at one end of the lock cylinder housing and is provided with a keyhole and is located in the receiving chamber of the lock cylinder seat, jew because a protruding body is arranged on two corresponding long sides of the keyhole, and one part of the engaging rod is engaged in the slot of the key cylinder body and thus in the arc notches of the lock washers and the seals, and the other part of the engaging rod is engaged in the insertion slot of the key cylinder seat;
• a key for insertion into the key cylinder, a guide groove being provided on two opposite walls of the key, a plurality of tooth recesses being provided on one wall of the key, and each tooth recess corresponding to the position of the corresponding lock disk of the lock cylinder;
• wherein the wall of the accommodating chamber of the key cylinder seat is provided with a accommodating groove, an axle hole is provided on one side of the accommodating groove and a recess is provided on the other side, an inner ring of the accommodating chamber of the key cylinder seat is provided with an annular groove, the inner bottom surface of the key cylinder housing is provided with a sliding groove a hole is provided in the slide hole, a pushing piece is arranged in the slide hole of the key cylinder body and provided with a through hole; wherein a limiting piece is arranged between the key cylinder housing and the positioning piece and is provided with a key hole and is located in the accommodating chamber of the key cylinder seat, an arc recess is arranged on two corresponding long sides of the key hole, a projection is provided on the outer edge of the limiting piece and into the insertion slot of the lock cylinder seat is engaged; wherein a stop plate is placed in the receiving groove of the lock cylinder seat, one side of the stop plate is provided with a pivot, the pivot is located in the pivot hole of the lock cylinder seat, a compression spring is placed in the recess of the lock cylinder seat and presses against the stop plate, a bottom of the The positioning stop located in the lock cylinder housing is arranged in the receiving chamber of the lock cylinder seat and is provided with a through opening, a first stop body protrudes at the position of the positioning stop that corresponds to the insertion slot of the lock cylinder seat and a second stop body protrudes at the position of the positioning stop that corresponds to the receiving groove and the recess of the lock cylinder seat is arranged and a locking ring is arranged on the outside of the positioning stop and snapped into the annular groove of the lock cylinder seat; the key is provided with an annular groove and the annular groove of the key corresponds to the position of the limiting piece in the lock cylinder.

The anti-theft structure of the key cylinder and key according to the present invention has the following advantages: when a key is inserted into a key cylinder for unlocking, the key must be fully inserted into the key cylinder before the key can be rotated to drive the rotation of the key cylinder body and unlock; to prevent the key from being turned when the key is not fully extracted from the lock cylinder, to prevent the keyholes of the locking discs in the lock cylinder from slipping, and thus the key can be inserted smoothly when the key is reinserted into the keyholes of the locking discs in order to achieve a long service life of the lock cylinder and the key and an optimal anti-theft effect.

character list

• 1 Fig. 14 is an exploded perspective view of a conventional key cylinder structure;
• 2 Fig. 12 is a schematic cross-sectional view of the conventional key cylinder structure;
• 3 Fig. 12 is an exploded perspective view of the key cylinder of an embodiment according to the present invention;
• 4 Fig. 13 is an exploded perspective view of the key cylinder of the embodiment according to the present invention from a different angle;
• 5 Fig. 12 is a perspective view of the key cylinder and key of the embodiment according to the present invention;
• 6 Fig. 12 is a sectional view of the embodiment of the key cylinder according to the present invention;
• 7 Fig. 12 is a schematic cross-sectional view of the key cylinder of the embodiment according to the present invention, in which the key is not inserted into the key cylinder;
• 8th Fig. 12 shows a schematic sectional view of the embodiment according to the present invention, in which the key is inserted into the keyhole of the key cylinder;
• 9 Fig. 12 shows a schematic cross-sectional view of the key cylinder of the embodiment according to the present invention, in which the key is inserted into the keyhole of the key cylinder;
• 10 Fig. 12 shows a schematic view of the embodiment according to the present invention, in which the key is extracted from the key cylinder.

Detailed description of the embodiment

For a better understanding of the object and the advantageous effects of the present invention, a possible preferred exemplary embodiment is described in detail below with reference to the figures.

It will be on the 3 until 5 referenced. The embodiment of the present invention comprises: a key cylinder 2 composed of a key cylinder seat 20, a key cylinder housing 21, a pushing piece 22, a plurality of lock washers 23, a plurality of packings 24, a restricting piece 25, a positioning piece 26, an engaging rod 27, a stopper plate 28, a compression spring 29, a positioning stop 30 and a locking ring 31, wherein a receiving chamber 200 is provided in the lock cylinder seat 20, the wall of the receiving chamber 200 is provided with an insertion slot 201 and further with a receiving groove 202, an axle hole 203 on one side of the receiving groove 202 and a recess 204 is provided on the other side, the inner ring of the receiving chamber 200 of the lock cylinder seat 20 is provided with an annular groove 205, the lock cylinder seat 20 is provided with a key insertion hole 206, the lock cylinder housing 21 is arranged in the receiving chamber 200 of the lock cylinder seat 20 t, the wall of the key cylinder housing 21 is provided with a slit 210 and a gap 211, the inner bottom surface of the key cylinder housing 21 is provided with a sliding recess 212, a hole 213 is provided in the sliding recess 212, a sliding piece 22 in the sliding recess 212 of the key cylinder housing 21 and provided with a through hole 220, a plurality of locking discs 23 and a plurality of gaskets 24 are alternately stacked in the key cylinder housing 21, each locking disc 23 is provided with a key hole 230, an arcuate notch 231 is provided on the outer edge of each locking disc 23, the arcuate notch 131 for engaging the engagement rod 26, further, a projection 232 located in the gap 211 of the lock cylinder housing 21 is provided on the outer edge of each locking disc 23, each seal 24 is provided with a through hole 240, an arc notch 241 is provided on the outer edge of each seal 24, the arc notches 241 to snap en of the engagement rod 26, a flange 242 located in the gap 211 of the lock cylinder housing 21 is provided on the outer edge of each seal 24, a limit piece 25 is arranged at one end of the lock cylinder housing 21 and is provided with a keyhole 250 and is located in the receiving chamber 200 of the lock cylinder seat 20, an arcuate recess 251 is arranged on two corresponding long sides of the keyhole 250, a projection 252 is provided on the outer edge of the limiting piece 25, the positioning piece 26 is arranged on the outside of the limiting piece 25 and is provided with a keyhole 260, respectively a protruding body 261 is arranged on two long sides of the keyhole 260 corresponding to each other, a part of the engaging rod 27 is engaged in the slot 210 of the key cylinder housing 21 and the other part is engaged in the insertion slot 201 of the key cylinder seat 20, an S top plate 28 is arranged in the receiving groove 202 of the lock cylinder seat 20, one side of the stop plate 28 is provided with an axis of rotation 280, the axis of rotation 280 is in the axis hole 203 of the lock cylinder seat 20, the compression spring 29 is arranged in the recess 204 of the lock cylinder seat 20 and against pushes one end of the stop plate 28 which is on the underside of the The positioning stop 30 located on the lock cylinder housing 21 is arranged in the receiving chamber 200 of the lock cylinder seat 20 and is provided with a through-opening 300, a first stop body 301 protrudes at the position of the positioning stop 30 that corresponds to the insertion slot 201 of the lock cylinder seat 20, and a second stop body 302 protrudes at the position with the Receiving groove 202 and the recess 204 of the lock cylinder seat 20 corresponding position of the positioning stop 30 is arranged and the locking ring 31 is arranged on the outside of the positioning stop 30 and is engaged in the annular groove 205 of the lock cylinder seat 20; and a key 4 for insertion into the lock cylinder 2, each having a guide groove 40 provided on two opposite walls of the key 4, a plurality of tooth recesses 41 provided on a wall of the key 4, a respective tooth recess 41 with the position of the corresponding Locking disk 23 of the lock cylinder 2 corresponds, the key 4 is provided with an annular groove 42 and the annular groove 42 corresponds to the position of the limiting piece 25 located in the lock cylinder 2 . In this way, an anti-theft structure consisting of a lock cylinder and a key is formed.

It will be on the 3 until 6 referenced. When assembling the lock cylinder 2, the sliding piece 22 is first inserted into the sliding recess 212 of the lock cylinder housing 21, then several closing disks 23 and several seals 24 are successively inserted alternately into the lock cylinder housing 21 so that the projections 232 of all closing disks 23 and the flanges 242 of all seals 24 are aligned with each other and located in the gap 211 of the key cylinder housing 21, then a part of the engaging rod 27 is engaged in the slot 210 of the key cylinder housing 21 and the limiting piece 25 and the positioning piece 26 are put on top of each other at one end of the key cylinder housing 21, further the Compression spring 29 is inserted into the recess 204 of the lock cylinder seat 20, the stop plate 28 is accommodated in the receiving groove 202 of the lock cylinder seat 20 and the axis of rotation 280 of the stop plate 28 is accommodated in the axis hole 203 of the lock cylinder seat 20 d, whereby the stop plate 28 can use the pivot axis 280 as a fulcrum and can be pivoted, then the limiting piece 25, the positioning piece 26 and the key cylinder housing 21 assembled with them are inserted together into the receiving chamber 200 of the key cylinder seat 20, with the protruding from the key cylinder housing 21 other part of the engaging rod 27 and the protrusion 252 of the limit piece 25 are snapped into the insertion slot 201 of the key cylinder seat 20, further one end of the stopper plate 28 is pressed by the compression spring 29 and on the walls of the locking discs 23 and the seals 24 located in the gap 211 of the lock cylinder seat 21, and abuts and is held by the protrusions 232 of the locking discs 23 and the flanges 242 of the seals 24 to abut and position all of the locking discs 23 and all the seals 24. The positioning stop 30 is then accommodated in the receiving chamber 200 of the lock cylinder seat 20, with the lower section of the lock cylinder housing 21 being inserted through the through-opening 300 of the positioning stop 30, the first stop body 301 of the positioning stop 30 latching into the insertion slot 201 of the lock cylinder seat 20 for positioning, and the second stop body 302 of the positioning stop 30 is accommodated in the receiving groove 202 and the recess 204 of the lock cylinder seat 20, whereby the stop plate 28 and the compression spring 29 can be held and positioned, the locking ring 31 is then snapped into the annular groove 205 of the lock cylinder seat 20, whereby the Positioning stop 30 is positioned in the receiving chamber 200 of the lock cylinder seat 20. Thus, the entire assembly process of the lock cylinder 2 is completed.

The lock cylinder 2 according to the invention can be attached to various locks for use. It will be on the 6 until 10 referenced. When using the lock cylinder 2 and the key 4 according to the invention, the key 4 is inserted into the key insertion hole 206 of the lock cylinder seat 20 for unlocking, the key being inserted through the key holes 260, 250 of the positioning piece 26 and the limiting piece 25 and deep into the key holes 230 of the Closing discs 23 and the through holes 240 of the seals 24, which are located in the lock cylinder housing 21 penetrates. When the lower end of the key 4 is inserted to the inner bottom surface of the key cylinder body 21, the key 4 is inserted into the through hole 220 of the push piece 22, whereby the push piece 22 is pushed by the bottom end of the key 4 and into the slide groove 212 of the key cylinder body 21 slides with one end of the slide piece 22 pressing against the stopper plate 28, thereby rotating it (as shown in Figs 8th and 9 shown). By rotating the stopper plate 28 and pressing the compression spring 29, the compression spring 29 is elastically compressed. After the stop plate 28 is pressed by the sliding piece 22 into the interior of the receiving groove 202 and has been rotated, the protrusions 232 of the closing disks 23 and the flanges 242 of the seals 24 are no longer abutted and blocked by the stop plate. In this way, the key 4 can be rotated and the key cylinder housing 21 can be driven to rotate to complete the unlocking operation. If the key 4 is not inserted in the lock cylinder 2 (as shown in the 6 and 7 shown), the protrusions 232 of the lock washers 23 and the flanges 242 of the seals 24 located in the lock cylinder body 21 are abutted and blocked by the stop plate 28 and cannot be rotated (as in Fig 7 shown). Further, when the user inserts the correct key 4 into the key insertion hole 206 of the key cylinder seat 20 and into the key holes 260, 250, 230 of the positioning piece 26, the positioning piece 25 and the lock washers 23, but the key 4 is not fully inserted to the end the projections 232 of the locking discs 23 and the flanges 242 of the seals 24 are still abutted and blocked by the stop plate 28 and cannot be rotated. Therefore, the key 4 must be inserted to the inner bottom of the key cylinder body 21 so that the pushing piece 22 is pushed by the lower end of the key 4 and slides, with the stop plate 28 being pushed by the pushing piece 22 and thereby made to rotate, causing the projections 232 of the closing disks 23 and the flanges 242 of the seals 24 can no longer be brought to abut and blocked by the stop plate 28 . Only then can the key 4 be turned in order to drive the lock cylinder housing 21 to rotate and thus complete the unlocking process. When the key 4 is used to unlock and then reset, the protrusions 232 of the lock washers 23 and the flanges 242 of the seals 24 are realigned with each other, then the key 4 is withdrawn from the key cylinder 2 with the push piece 22 no longer being pushed by the key 4 is pressed and the stopping plate 28 and the pushing piece 22 are elastically returned to their original positions by the compression spring 29 (as in Figs 6 and 7 shown), whereby the protrusions 232 of the locking discs 23 and the flanges 242 of the seals 24 located in the lock cylinder body 21 are again abutted and blocked by the stop plate 28 and thus the locking discs 23 and the seals 24 cannot be rotated. Furthermore, when the key 4 is to be extracted from the key cylinder 2, but the key 4 has not been completely extracted from the key cylinder 2 (as in 10 shown), the protruding body 252 of the restricting piece 25 is engaged with the insertion slot 201 of the key cylinder seat 20 and its rotation is restricted so that the key 4 cannot be rotated arbitrarily during the extraction process from the key cylinder 2 and can only be extracted straight. This prevents the key 4 from being turned while being pulled out of the lock cylinder 2, so that the keyholes 230 of the locking discs 23 in the lock cylinder 2 do not slip and the key 4 can be easily reinserted into the keyholes 230 of the locking discs 23.

In the present invention, since the inner bottom of the key cylinder housing 21 is provided with a slide groove 212 and a sliding piece 22, if the key 4 is not fully inserted to the inner bottom surface of the key cylinder housing 21, it cannot be rotated to prevent the key 4 is deformed or broken by a strong rotation of the lock cylinder 2. In this way, the service life of the key 4 and the lock cylinder 2 can be increased. With the invention, an excellent anti-theft effect is also achieved. The arrangement of the limiting piece 25 can prevent the key 4 from being turned if it is not completely pulled out of the lock cylinder 2, so that the keyholes 230 of the locking discs 23 in the lock cylinder 2 do not slip and the key 4 can easily be put back into the keyholes 230 of the locking discs 23 can be inserted.

Reference List

1

lock cylinder

10

lock cylinder seat

100

recording chamber

101

slot

102

key insertion hole

11

lock cylinder housing

110

slot

111

gap

12

intervention staff

13

locking disc

130

keyhole

131

arc notch

132

head Start

14

poetry

140

through hole

141

arc notch

142

flange

15

positioning piece

150

keyhole

151

protruding body

2

lock cylinder

20

lock cylinder seat

200

receiving chamber

201

slot

202

receiving groove

203

axle hole

204

recess

205

ring groove

206

key insertion hole

21

lock cylinder housing

210

slot

211

gap

212

sliding recess

213

Hole

22

sliding piece

220

through hole

23

locking disc

230

keyhole

231

arc notch

232

head Start

24

poetry

240

through hole

241

arc notch

242

flange

25

boundary piece

250

keyhole

251

arc recess

252

protruding body

26

positioning piece

260

keyhole

261

protruding body

27

intervention staff

28

stop plate

280

axis of rotation

29

compression spring

30

positioning stop

300

passage opening

301

first stop body

302

second stop body

31

locking ring

4

Key

40

guide groove

41

tooth recess

42

ring groove

Claims (1)

A lock cylinder and key anti-theft structure comprising: a lock cylinder (2) comprising a lock cylinder seat (20), a lock cylinder housing (21), a positioning piece (26) and an engagement rod (27), the lock cylinder seat (20) having a receiving chamber (200) and a key insertion hole (206), the inner wall of the receiving chamber (200) is provided with an insertion slot (201), the lock cylinder housing (210) is arranged in the receiving chamber (200) of the lock cylinder seat (20), the wall of the lock cylinder housing (21) is provided with a slot (210) and a gap (211), a plurality of lock washers (23) and a plurality of gaskets (24) are stacked alternately in the lock cylinder housing (21), each lock washer (23) with a keyhole (230 ) is provided, an arcuate notch (231) is provided on the outer edge of each locking disc (23), further in the gap (211) of the lock cylinder housing (21) located cher protrusion (232) is provided on the outer edge of each closing disc (23), each seal (24) is provided with a through hole (240), an arc notch (241) is provided on the outer edge of each seal (24), further in the gap ( 211) of the lock cylinder body (21) located flange (242) is provided on the outer edge of each gasket (24), the positioning piece (26) is arranged at one end of the lock cylinder body (21) and provided with a keyhole (260) and located in the accommodation chamber (200) of the lock cylinder seat (20), a protruding body (261) is arranged on two corresponding long sides of the keyhole (260) of the positioning piece (26), respectively, and a part of the engaging rod (27) fits into the slot (210) of the Lock cylinder housing (21) and thus in the arc notches (231, 241) of the closing discs (23) and the seals (24) is engaged and the other part of the engagement rod (27) in the insertion slot (201) of the Sc closing cylinder seat (20) is engaged; a key (4) which is used for insertion into the lock cylinder (2), each having a guide groove (40) on two opposite walls of the key (4), a plurality of tooth recesses (41) are provided on a wall of the key (4) and a respective tooth recess (41) corresponds to the position of the corresponding locking disc (23) of the lock cylinder (2); characterized in that the wall of the receiving chamber (200) of the lock cylinder seat (20) is provided with a receiving groove (202), an axle hole (203) is provided on one side of the receiving groove (202) and a recess (204) on the other side , an inner ring of the receiving chamber (200) of the lock cylinder seat (20) is provided with an annular groove (205), the inner bottom surface of the lock cylinder housing (21) is provided with a sliding recess (212), a hole (231) in the sliding recess (212) a sliding piece (22) is provided in the sliding groove (212) of the lock cylinder housing (21) and is provided with a through hole (220); wherein a limit piece (25) is arranged between the lock cylinder housing (21) and the positioning piece (26) and provided with a keyhole (250) and is located in the receiving chamber (200) of the lock cylinder seat (20), each having an arcuate recess (251). two corresponding long sides of the keyhole (250) of the limiting piece (25) is arranged, a projection (252) is provided on the outer edge of the limiting piece (25) and is engaged in the insertion slot (201) of the lock cylinder seat (20); wherein a stop plate (28) is arranged in the receiving groove (202) of the lock cylinder seat (20), one side of the stop plate (28) is provided with a pivot (280), the pivot (280) in the pivot hole (203) of the lock cylinder seat ( 20), a compression spring (29) is arranged in the recess (204) of the lock cylinder seat (20) and presses against the stop plate (28), a positioning stop (30) located on the underside of the lock cylinder housing (21) in the receiving chamber (200 ) of the lock cylinder seat (20) and provided with a through opening (300), a first stop body (301) protruding at the position of the positioning stop (30) corresponding to the insertion slot (201) of the lock cylinder seat (20) and a second stop body (302 ) is arranged protruding at the position of the positioning stop (30) corresponding to the receiving groove (202) and the recess (204) of the lock cylinder seat (20) and a locking ring (31 ) is arranged on the outside of the positioning stop (30) and snapped into the annular groove (205) of the lock cylinder seat (20); the key (4) being provided with an annular groove (42) and the annular groove (42) of the key (4) corresponding to the position of the limiting piece (25) located in the lock cylinder (2).

Images