EP2685030B1 - Lock cylinder with associated key - Google Patents

Description

The invention relates to a locking cylinder with a housing having a housing cavity and a cylinder core rotatably mounted in the housing cavity, which has a key channel for inserting a suitable key, core pin bores opening into the key channel, which are aligned in a locked position with housing pin bores and in which from the chest side in the coding recesses cut into the key are stored in a release position of tumbler pins, with a locking bar assigned to the cylinder core, which engages in a locking position with a locking section in a locking groove of the housing cavity and is supported with a support section on a locking pin mounted in a bearing bore, the bearing bore being parallel runs to the core pin bore and transversely to the direction of displacement of the locking bar, the blocking pin being inserted against the restoring force by means of a control profile of the appropriate key he spring arranged in the cylinder core can be brought from a blocking position into a release position in which the support section can enter an escape niche of the blocking pin in order to achieve a release position of the locking bar, the blocking pin having a control slope at its end opposite the spring, at which a engages the first section of a control element which can be displaced transversely to the bearing bore and which, with a section opposite the first section, scans the depth of a broadside recess in the key.

A generic locking cylinder is in the JP 2002-194934 described. The control is a ball there.

From the DE 195 19 600 A1 a cylinder lock with a security key is known, in which the broad side of the key is scanned by touch elements.

A locking cylinder with a suitable key is also described by WO 96/20324 , Here too, keyhole recesses are scanned by tumblers.

In the CH 647 837 A5 a locking pin is provided which is supported by a spring on the bottom of a bearing bore. The blocking pin has a plurality of blocking sections which are separated from one another in the axial direction by circumferential grooves, the grooves in between forming alternative niches into which a support section of a blocking strip can enter in a release position, so that the blocking strip which engages in a blocking position in a blocking groove can emerge there. The locking pin is sorted into its release position by a step of the key. The key also has incisions on the chest for sorting core pins stored in core holes.

The DE 102 20 078 B3 describes a lock cylinder with a key, which has a broad side recess that is scanned by a locking pin. The locking pin interacts directly with a locking rod which can be displaced in the direction of insertion of the key, with truncated cone-shaped control slopes stepping against one another.

The one from the US 5,079,936 Lock cylinder described has a housing, a cylinder core rotatably mounted in a housing cavity with a key channel in which a key can be inserted, which sorts core pins by means of coding recesses on the chest side. A supplementary tumbler is sorted via broadside depressions. The supplementary tumbler interacts with another pin tumbler, which can be shifted parallel to the core pin, via a control slope.

The EP1 816 288 A2 describes a key with breast-side coding recesses that form a vertex that is scanned by a scanning end of a core pin. The scanning end of the core pin is formed by an eccentric extension of a guide section of the core pin. The coding recess has a side wall that runs parallel to the key broad side surface.

The DE 27 03 464 A1 describes a flat key in which the coding recesses have side surfaces which run in a parallel plane to the key broad side surface.

The AT 002 535 U1 describes a lock cylinder with pin tumblers, the core pins of which have eccentrically arranged scanning ends.

The DE19939734 A1 describes a locking cylinder, wherein an axially displaceable control pin is mounted in the cylinder core, which cooperates with a supplementary tumbler pin, the end of the control pin forming a slope on which a counter-bevel of the supplementary tumbler pin is supported.

The invention has for its object to increase the security of a generic lock cylinder.

The object is achieved by the invention specified in claim 1, wherein it is essentially provided that the control bevel of a blocking pin is a conical or frustoconical surface and the control element is a control pin, the first section of which also forms a truncated cone or frustoconical surface. In contrast to the generic state of the art, the control element is elongated because it is a pen. A section of the pin forms the conical or frustoconical shape Control slopes, which also cooperates with a cone or truncated cone surface. The conical surface lies on the conical surface. Between the two sections of the control pin there is a cylindrical section with which the control pin is mounted in a bearing bore. This makes it possible to provide the side of the key channel, which points to the storage of the blocking pin, with grooves and ribs. This wall of the key channel can therefore have a deeply cut variation profile. The control slope is opposite a second section, with which the depth of a broadside recess of the key is scanned. The control pin preferably has no radially protruding projections or radially inwardly projecting depressions but a smooth-walled surface. The control pin and the blocking pin cooperating with it can be rotationally symmetrical. The blocking pin has in particular a circumferential ring groove into which a support section of the locking bar can dip. As a result, the blocking pin can perform its function in any desired rotational position. This particularly facilitates assembly.

The bearing hole of the control pin or the bearing hole of the blocking pin can be blind holes which have a constant cross section. This simplifies production. It is also advantageous if the bores to be drilled in the cylinder core run parallel or transversely to one another and in particular transversely or parallel to the direction of extension of the cylinder core. The spring loading the locking pin acts on the control pin via the control slopes. The spring is arranged so that it acts on the control pin in the direction of the key channel. The scanning end of the control pin opposite the control slope of the control pin is thus pressed against a stop when the key is not inserted and against the key broad side surface or in when the key is inserted in the key channel a broadside recess cut into the key broadside surface. The stop can be located in the essentially rectangular envelope surface of the key channel having grooves and ribs. In particular, the stop can be formed by a rib protruding into the envelope surface, against which a peripheral partial section of the control pin rests when the key is not inserted. The rib forming the stop preferably lies on the same key channel wall into which the bearing bore bearing the control pin also opens. The locking bar has a locking section which projects into a locking groove of the wall of the housing cavity in a locking position. The locking groove extends in the axial direction along the wall of the housing cavity and has sloping groove walls in the circumferential direction. The locking bar is acted upon by locking bar springs in the radial outward direction, the locking bar springs being supported on the cylinder core. They are particularly in the openings. The support section of the locking bar is supported on a blocking section of the blocking pin when the key is not inserted. The locking pin is held in the locking position by the spring. If a suitable key is pushed into the key channel, the control pin is moved transversely to the direction of insertion of the key channel and transversely to the direction of displacement of the blocking pin. The control pin shifts the blocking pin into an axial position via the oblique flank attack, in which the support section of the locking bar can enter an escape niche of the blocking pin. The escape niche is preferably formed by a circumferential ring groove. The key shaft preferably has a plurality of broad side depressions one behind the other in the insertion direction. The cylinder core has a corresponding number of control pins, each of which interacts with a blocking pin, which each interacts with a support section of the locking bar. The abutment of the locking pin springs is formed by a support bar. The support bar can be formed by a spring pin be, which lies in a recess formed by a longitudinal slot. The depression crosses the mouths of several bearing bores of the locking pins and is held in the depression in particular by clamping. The width of the recess is slightly less than the diameter of the spring pin. In order to insert the spring pin into the recess, it has to narrow elastically.

A further development of the invention relates to the further development of the core pins. The core pin according to the invention has a scanning section and a locking section. The locking section has an end face which, in the release position, which enables the cylinder core to be rotated, lies in the separating surface between the cylinder core and the housing cavity. The locking section, which has an essentially circular plan, has a second end face opposite the first, from which the locking section protrudes off-center. The locking section can also have a circular outline. In relation to the locking section, it forms an eccentric pin, the end of which forms the scanning end, which can scan the apex of the broadside recess of the key shaft.

The core pin bore is designed as a blind bore. The bottom of the core pin bore forms a stop surface against which the end face of the locking section rests when the key is not inserted. The housing pin is supported on this end face, which in turn is acted upon by a tumbler spring which is supported on the bottom of the housing pin bore. The bottom of the core pin bore has an eccentrically arranged opening through which the eccentric pin protrudes. As a result of this arrangement, the core pin cannot rotate in the core bore, even though its components each have a circular outline.

The invention also relates to a key that matches the locking cylinder, which is characterized in that it has coding recesses only on one of its two broad sides. If the key is designed as a reversible key, coding cuts are cut into the key shaft from the two narrow sides pointing away from one another, the coding cuts each extending only over one of the two broad sides. In cross-section, the key shaft has a point-symmetrical shape with respect to the key central axis. There are continuous profile grooves / ribs on the back of the coding cuts assigned to each narrow side. The coding cuts arranged along a narrow side of the key are thus assigned to only one of the two broad sides of the key shaft. They have side walls which run in a parallel plane to the key center plane or to the key broad side surface, the side walls of the coding incisions preferably running in the key center plane. The section of the opposite broadside, which runs along the narrow key side, has no coding incisions, but continuous profile grooves or profile ribs.

Figur 1:

eine Seitenansicht auf ein Ausführungsbeispiel der Erfindung;

Figur 2:

eine perspektivische, teilweise aufgebrochene Darstellung des erfindungsgemäßen Schließzylinders;

Figur 3:

einen Schnitt gemäß der Linie III - III in Figur 1;

Figur 4:

einen Schnitt gemäß der Linie IV - IV in Figur 1;

Figur 5:

den Schnitt gemäß der Linie V - V in Figur 3;

Figur 6:

den Schnitt gemäß der Linie VI - VI in Figur 4;

Figur 7:

den Schnitt gemäß der Linie VII - VII in Figur 4;

Figur 8:

einen erfindungsgemäßen Schlüssel in perspektivischer Darstellung,

Figur 9:

eine Darstellung des Schlüsselschaftes,

Figur 10:

den Schnitt gemäß der Linie X - X in Figur 9;

Figur 11:

den Schnitt gemäß der Linie XI - XI in Figur 9;

Figur 12:

eine erste Explosionsdarstellung und

Figur 13:

eine zweite Explosionsdarstellung.

An embodiment of the invention is explained below with reference to the accompanying drawings. Show it:

Figure 1:

a side view of an embodiment of the invention;

Figure 2:

a perspective, partially broken away view of the lock cylinder according to the invention;

Figure 3:

a section along the line III - III in Figure 1 ;

Figure 4:

a section along the line IV - IV in Figure 1 ;

Figure 5:

the section along the line V - V in Figure 3 ;

Figure 6:

the section according to the line VI - VI in Figure 4 ;

Figure 7:

the section along the line VII - VII in Figure 4 ;

Figure 8:

a key according to the invention in perspective view,

Figure 9:

a representation of the key shaft,

Figure 10:

the section along the line X - X in Figure 9 ;

Figure 11:

the section according to the line XI - XI in Figure 9 ;

Figure 12:

a first exploded view and

Figure 13:

a second exploded view.

The lock cylinder shown in the drawings has a cylinder housing 1 with a cylinder section and a flange section. The cylinder section has a housing cavity 3, in which a cylinder core 2 is inserted. In the flange section there are housing bores 6, in which housing pins 8 supported on tumbler springs are located.

The cylinder core 2 has a key channel 4 for inserting a key shaft 31 of a key 30. Core pin bores 5 open into the narrow side of the key channel 4 and are aligned with the housing pin bores 6 in the locked position. Due to their length, core pins 7, which define the key secret, are inserted into core pin bores 5, each of which has a locking section 44 and an eccentric pin 42 projecting therefrom. The outer contour of the cross section of the key channel 4, that is to say its envelope surface, is approximately rectangular. Coding ribs protrude into the key channel from the long sides of the rectangle that goes through the bottoms of the grooves.

The core pin bores 5 are designed as blind bores with a bottom 39 which has an opening 40 at an eccentric point. The locking section 44 has an end face 45 facing the housing pin bore 6, on which an end face of the housing pin 8 is supported in the locking position. The locking section 44, which has a circular outline, also has an end face 41, from which an eccentric pin 42 projects at an eccentric point and projects through the eccentric bore 40. When the key 30 is not inserted, the end face 41 is supported on the base 39. When a suitable key is inserted, the locking section 44 completely displaces the housing pin 8 out of the core bore 5. An unsuitable key displaces the core pin 7 into the housing bore 6.

The shaft 31 of the key 30 to be inserted into the key channel 4 has profile ribs 46, 47 and a profile groove 32 which forms a guide groove. Profile ribs of the side walls of the key channel 4 protrude into the profile grooves 47 of the key shaft 31. The profile ribs 46 of the key 30 designed as a reversible flat key engage in the grooves that form between the profile ribs of the key channel. The guide rib 25 engages in the guide groove 32.

The key has coding cuts 35 on both opposite narrow sides. The coding cuts 35 form side flanks which form a vertex 37 which is scanned by the scanning end 43 of the eccentric pin 42. The coding cutouts 35 form half-sided breast incisions in the key shaft. They have a side surface 36 which extends approximately in the key center plane 49. As a result of this configuration, the broad side of the key shaft 31 opposite the breast incision 35 has continuous profile grooves 47 or profile ribs 46. Because of the point-symmetrical configuration of the key cross section, identically designed profile ribs / grooves 46, 47 or coding incisions 35 lie diagonally opposite one another. The key shaft 31 has two key narrow sides 48, 48 'which run essentially parallel to one another. Since the key is a reversible flat key, the shows Figure 9 both one broadside and the other broadside, since both broad sides are configured the same. Profile ribs 46 and profile grooves 47 lying therebetween extend continuously along a narrow side 48 ′. Coding cuts 35 are arranged along the opposite narrow side 48.

In addition to the chest incisions 35 that can be scanned from the narrow side 48, 48 ′ of the key channel 4, the key shaft 31 has broad side depressions 34 that can be scanned from the broad side of the key channel 4. These wide side depressions 34 are scanned by control pins 20. The key secret can be defined by the length of the control pins 20 and the axial displacement of the blocking pins 14 with the escape niche 16.

The control pins 20 are inserted into bearing bores 26 which have a constant cross section. The bearing bore 26 is to the outer surface of the cylinder core 2 open and opens into the key channel 4. Before the opening of the bearing bore 26 there is a profile rib 25. In the exemplary embodiment, it is a guide rib. This rib is rooted on the side wall of the key channel 4 assigned to the bearing bore and forms a stop 24 against which a stop section 23 of the scanning end 22 of the control pin 20 strikes. The scanning end 22 protrudes a sufficient distance into the key channel 4 in order to be able to enter the broadside recess 34 of the key.

The end of the control pin 20 opposite the scanning end 22 forms a control bevel 21 which is formed by a conical surface as a result of the rotational symmetry of the control pin 20. The circumferential contour of the control pin 20 is essentially stepless. It has a cylindrical lateral surface, to which the conical surface 21 is connected on one side and, on the other side, a stop section 23 which runs on a truncated cone surface and merges into the scanning end 22. The control pin 20 largely has the shape of a barrel, whereby it essentially deviates from the ideal barrel shape, which has a conical shape, due to the design of one of the two end faces.

A bearing bore 13 opens into the bearing bore 26 and extends transversely to the bearing bore 26 and parallel to the core pin bore 5. A rotationally symmetrical blocking pin 14 is mounted in this bearing bore 13. The blocking pin 14 has a control bevel 17 which is designed as a conical surface and which projects into the region of the bearing bore 26 for the control pin 20. The conical surface 17 is supported on the conical surface 21, the two conical surfaces being approximately in line with one another.

The end of the blocking pin 14 opposite the control bevel 17 is acted upon by a reversing compression spring 18 which is supported on a clamping pin 19. The clamping pin 19 is designed as a spring pin and clamps in a longitudinal slot 50 which crosses the mouths of several bearing bores 13.

At least one blocking section 15 is located between the two ends of the blocking pin 14. This is an area of the largest diameter and an escape niche 16 which is designed as an annular groove. This is an area of the smallest diameter.

In the outer surface of the cylinder core 2, a longitudinal slot 29 is incorporated, which supports a locking bar 9. The locking bar 9 has support sections 11 which can protrude into the bearing bores 13 of the locking pin 14. The support portions 11 protrude from a locking portion 10 of the locking bar 9.

In a locked position, the locking section 10 of the locking bar 9 projects into a locking groove 12 which extends in the axial direction of the housing cavity 3 in the wall of the housing cavity 3 and which has walls which are inclined in the circumferential direction. In the locked position, the support section 11 of the locking bar 9 is supported on the locking section 15 of the locking pin 14 in such a way that the locking section 10 projects into the locking groove 12 in a form-fitting manner, so that a rotatability of the cylinder core 2 is blocked.

The key channel 4 can be generated by clearing. The core pin bores 5 are produced by means of a drill or a milling cutter. The eccentric openings 40 are drilled in the bottoms 39 of the core pin bores 5. The bearing bores 13 are drilled parallel to the core pin bores 5, the mouths of which are connected to one another by a longitudinal slot 50. crosswise to the core pin holes 5 and the bearing holes 13 for the blocking pin 14, the bearing holes 26 for the control pins 20 are drilled, which then extend transversely to the direction of extension of the key channel wall. Bores are drilled parallel to these bearing bores 26, through which the support sections 11 can protrude into the bearing bore 13. Furthermore, bores 28 are drilled between these openings, on the bottoms of which locking bar springs 27 can be supported, which act on the locking bar 9 in the locking groove 12. A total of 2 locking groove springs 27 are provided.

In a locking position, not shown, in which no key is inserted into the key channel 4, the interface between the cylinder core 2 and the housing cavity 3 is crossed by the core pin 7. The locking section 10 of the locking bar 9 lies in the locking groove 12. The locking bar 9 cannot emerge from the locking groove 12, since the support section 11 comes against the locking section 15 of the locking pin 14 beforehand. The control slope 21 is supported on the control slope 17. The stop section 23 lies against the stop 24. The scanning end 22 projects into the key channel 4.

If a suitable key 30 is pushed into the key channel, the core pins 7 and the control pins 20 are displaced in the radially outward direction (see Figures 3 and 4 ). This takes place against the restoring force of the housing pin spring or the blocking pin spring 18. If the key 30 is fully inserted with its key shaft 31 into the key channel 4, the scanners 43 of the eccentric pins 42 feel the apexes 37 of the breast incisions 35 assigned to them and the scanners 22 of the Control pins 20 from their associated broadside depressions 34. The housing pin 8 is completely displaced from the core pin bore 5 and the blocking pin 14 is brought into an axial position in which the support section 11 in the escape niche 16 can occur. The locking cylinder can be turned in this position. Rotation causes an oblique wall of the locking section 10 to slide along the oblique wall of the locking groove 12, so that the locking section 10 of the locking bar 9 can emerge from the locking groove 12.

If the locking cylinder is rotated back into the locking position, the locking bar springs 27 shift the locking bar 10 back into its locking position. In the exemplary embodiment described above, both the invention relating to the control of the locking bar 9 and the development of the invention relating to the configuration of the core pins 7 are embodied. In one embodiment, not shown, it is provided, for example, that the blocking pin 14 has a control bevel 17 at its end opposite the spring 18, on which a control bevel 21 engages a control pin 20 which can be displaced transversely to the bearing bore and which, with its end 22 opposite the control bevel 21, depth a broadside recess 34 of the key 30 scans. In this exemplary embodiment, the core pin has a rounded outline, which also projects into the key channel 4 through an opening 40 arranged in the bottom 39 of the core pin bore 5. However, the scanning section 42 originates from the center of the locking section 44. In this embodiment, not shown, the opening 40 lies in the region of the center of the bottom 39. In this embodiment, however, the scanning section 42 also scans the apex 37 of a broadside recess 35 in the key 30, which Broadside recess 35 has a side surface 36 running parallel to the key broadside. at In this exemplary embodiment, the center axis of the core pin bore is laterally offset with respect to the key center plane 49.

In a further exemplary embodiment, likewise not shown and not according to the invention, the core pins 7 have the shape shown in the drawings, the scanning section 42 having a rounded cross section protruding into the key channel 4 through an opening 40 arranged eccentrically in the bottom 39 of the core pin bore 5. The control of the locking bar 9 takes place here in a conventional manner or the locking cylinder has no additional locking bar. <B> LIST OF REFERENCES: </ b> 1 cylinder housing 27 Ledgers spring 2 cylinder core 28 Spring bearing bore 3 housing cavity 29 longitudinal slot 4 keyway 30 key 5 Core pin bore 31 key shaft 6 Housing pin bore 32 profile groove 7 core pin 33 profile rib 8th housing pin 34 Broadside recess 9 locking bar 35 chest incision 10 blocking portion 36 side surface 11 support section 37 vertex 12 locking groove 38 web 13 Bearing hole for locking pin 39 ground 14 blocking pin 40 eccentric opening 15 blocking portion 41 front 16 evasive niche 42 eccentric pin 17 Control slope / taper surface 43 scanning 18 feather 44 blocking portion 19 clamping pin 45 face 20 control pin 46 profile rib 21 Control slope / taper surface 47 profile groove 22 scanning 48, 48 ' narrow side 23 stop section 49 Key midplane 24 attack 50 longitudinal slot 25 rib 26 Bearing hole from control pin

Claims (15)

1. Lock cylinder comprising a housing (1), having a housing cavity (3), and a cylinder core (2) which is rotatably mounted in the housing cavity (3) and comprises a key channel (4) for inserting a matching key (30), core pin bores (5) opening into the key channel (4) which are aligned with housing pin bores (6) in a locking position and in which tumbler pins (7, 8) are mounted which can be moved into a release position by coding depressions (35) which are cut into the key (30) on the front, comprising a locking strip (9) which is associated with the cylinder core (2), a locking portion (10) of which engages, in a locking position, in a locking depression (12) in the housing cavity (3) and a support portion (11) of which is supported on a blocking pin (14) mounted in a mounting bore (13), the mounting bore (13) extending in parallel with the core pin bore (5) and transversely to the movement direction of the locking strip (9), it being possible to bring the blocking pin (14) from a blocking position into a release position by means of a control profile of the matching key (30) against the returning force of a spring (18) arranged in the cylinder core (2), in which release position the support portion (11) is able to enter into an escape region (16) for the blocking pin (14) in order to achieve a release position of the locking strip (9), the blocking pin (14) comprising a control slope (17) at its end (18) opposite the spring, on which control slope a first portion (21) of a control element (20) engages, which element can be moved transversely to the mounting bore and a second portion (22) of which opposite the first portion (21) traces the depth of a dimple (34) in the broad side of the key (30), characterised in that the control slope (17) of the blocking pin (14) is a conical or frustoconical surface, and in that the control element is a control pin (20), the first portion (21) of which is also a conical or frustoconical surface.
2. Lock cylinder according to any of the preceding claims, characterised in that the control pin (20) and/or the blocking pin (14) is rotationally symmetrical.
3. Lock cylinder according to any of the preceding claims, characterised by a cylindrical portion which is arranged between the first portion (21) and the second portion (21) of the control pin (20) and by means of which the control pin (20) is mounted in its mounting bore (26).
4. Lock cylinder according to any of the preceding claims, characterised in that the mounting bore (13, 26) of the locking pin (14) and/or the control pin is a blind bore having a substantially constant cross section.
5. Lock cylinder according to any of the preceding claims, characterised in that the spring (18) which loads the blocking pin (14) acts on the control pin (20) in the direction of the key channel (4).
6. Lock cylinder according to any of the preceding claims, characterised in that the end of the control pin (20) opposite the control slope (21) rests against a stop (24) when the key (30) is not inserted, which stop is located in the enveloping surface of the key channel (4) comprising grooves and ribs.
7. Lock cylinder according to claim 6, characterised in that the stop (24) is formed by a rib (25) projecting into the key channel (4).
8. Lock cylinder according to claim 7, characterised in that the rib (25) is formed by the key channel wall comprising the mounting bore (26) of the control pin (20).
9. Lock cylinder according to any of the preceding claims, characterised in that the locking bar (9) is spring-loaded into the locking groove (12) in particular by a plurality of locking bar springs (27).
10. Lock cylinder according to any of the preceding claims, characterised by a plurality of blocking pins (14) each cooperating with a control pin (20).
11. Lock cylinder according to claim 10, characterised in that the springs (18) acting on the blocking pins (14) are supported on a clamping pin (19).
12. Lock cylinder according to either claim 10 or claim 11, characterised in that the clamping pin (19) rests, in particular by clamping, in a longitudinal slot (50) crossing the mouth of a plurality of mounting bores (13).
13. Lock cylinder according to any of the preceding claims, characterised in that core pins (7) of the tumbler pins (7, 8) comprise a locking portion (44) and a tracing portion (42) projecting in an off-centre manner from said locking portion, the tracing portion (42) having a rounded plan view and protruding into the key channel (4) through an opening (40) eccentrically arranged in the bottom (39) of the core pin bore (5).
14. Lock cylinder according to claim 13, characterised in that the locking portion (44) and/or the tracing portion (42) has a circular plan view.
15. Key (30), in particular turning flat key, for a lock cylinder according to either claim 13 or claim 14, comprising dimples (34) cut into a broad side of the key, and coding recesses (35) which are cut into the key shank (31) from one or both narrow sides (48, 48') of the key and comprise a vertex (37) which can be traced by the tracing end (43) of a tumbler pin (7) and a side surface (36) extending in parallel with the key mid-plane (49), in particular approximately in the middle of the key, characterised in that the coding recesses (35) extending along a narrow side of the key (48, 48') are each associated with only one broad side of the key shank (31), the portion of the broad side of the key shank (31) opposite the coding recesses (35) in each case having continuous profile grooves/ribs (46, 47).

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