CN112709497B

CN112709497B - Lock core

Info

Publication number: CN112709497B
Application number: CN202011096714.9A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: ABUS August Bremicker Soehne KG
Current assignee: ABUS August Bremicker Soehne KG
Priority date: 2019-10-25
Filing date: 2020-10-14
Publication date: 2024-02-09
Anticipated expiration: 2040-10-14
Also published as: EP3812537C0; ES2963888T3; TW202126888A; MX2020011187A; EP3812537A1; DE102019128884A1; EP3812537B1; CN112709497A

Abstract

The invention relates to a lock cylinder comprising a cylinder housing and a cylinder core which is rotatably supported in the cylinder housing about a cylinder axis and which is secured against axial movement relative to the cylinder housing by means of a circlip, wherein the cylinder core has a key slot for the introduction of an associated key, wherein the cylinder core is rotatable between a locking position and an opening position by means of the introduced key, and wherein the cylinder has a plurality of pins which are actuatable by means of the associated key. In the lock cylinder according to the invention, it is provided that a bullet-shaped collar is formed together with the cylinder housing for limiting the rotation angle of the cylinder core within a predetermined rotation angle range.

Description

Lock core

Technical Field

The invention relates to a lock cylinder comprising a cylinder housing and a cylinder core, which is rotatably supported in the cylinder housing about a cylinder axis and is secured against axial movement relative to the cylinder housing by means of a circlip, wherein the cylinder core has a key slot for the introduction of an associated key, wherein the cylinder core is rotatable between a locking position and an opening position by means of the introduced key, and wherein the cylinder has a plurality of pins which are actuatable by means of the associated key.

Background

Such lock cylinders are generally known and are used in locks of many different designs, for example in door locks, padlocks or two-wheel locks, to name a few. There are different designs such as a profile lock cylinder, a round lock cylinder, an oval lock cylinder, a half round lock cylinder, a double lock cylinder or a knob lock cylinder.

Depending on the type of lock, the locking position of the lock cylinder may also be designated as the zero position, while the unlocking position is designated as the actuating position. Thus, for example, in the case of a door lock having a latch preloaded by a spring, the latch may be in its rest position defined by the preload, in a locked or zero position of the lock cylinder, and the latch may be retracted into the lock housing against the preload in an open or actuated position of the lock cylinder. Padlocks and two-wheel vehicle locks are typically provided with substantially similar modes of operation. Here, the lock bolt is moved to a release position or an open position to open the lock via the lock cylinder such that a closure hoop or pusher previously locked by the lock bolt is released for removal from the lock body of the lock. After the opening has occurred, the lock cylinder must be rotated back to the locked or zero position in order to be able to remove the key from the keyway. With some locks of this type, the bolt can be preloaded by a spring force in the direction of the locking position. In particular, a so-called automatic function may be provided in which the repeated closing of the lock without key actuation is performed by inserting a closing collar or pusher into the lock body, whereby the closing collar or pusher latches onto the lock bolt. With such locks, which are generally arranged in connection with the invention, it is also possible to provide that the key is removable from the cylinder core only in the locked or zero position of the cylinder core, or only in the locked or zero position of the cylinder core and in a position in which the cylinder core is rotated 180 ° relative to the cylinder core.

Conventional lock cylinders have the property that the cylinder core is free to rotate, i.e. with any desired number of (total) rotations, when a key is introduced. The limitation of the rotation angle of the cylinder core is achieved only by the closing mechanism of the lock provided downstream and in which the cylinder is provided. In particular, the limitation of the rotation angle is achieved by effectively coupling the rotation of the cylinder core to a downstream arranged closing mechanism, for example by coupling the lock head to the lock bolt and the lock latch in a door lock of the type described above, or by coupling the drive extension of the cylinder core to the collar of the padlock. Depending on the production tolerances of the components involved, which lead to a movement gap of the closing mechanism arranged downstream of the cylinder core or a gap between the cylinder core and the closing mechanism arranged downstream, it may occur that the set rotation angle range of the cylinder core cannot be maintained accurately.

In particular, this may occur when the cylinder core is turned back to a locked or zero position, where the key may be removed from the cylinder. In a plug with pin tumblers, this may for example result in the core bores in the plug core no longer being exactly aligned with the shell bores in the plug shell, so that the pin tumblers, each of which is movably accommodated therein, are blocked from movement. In particular, the core pin, i.e. the pin tumbler, which is accommodated in the core of the plug, cannot sink into the shell hole and thus cannot remove the key from the core of the plug or from the key slot.

Thus limiting the operational comfort, since the key must first be slightly rotated again in the direction of the zero position before the key can be removed.

For cylinder locks with pin tumblers of different configurations, such as plate tumblers or disc tumblers, considerable problems may occur.

Disclosure of Invention

It is therefore an object of the present invention to provide a lock cylinder that enables comfortable operation.

In the lock cylinder according to the invention, it is provided that the bullet-shaped collar forms, together with the cylinder housing, a rotation abutment for limiting the rotation angle of the cylinder core to a predetermined rotation angle range. The rotation angle abutment may limit the rotation angle of the cylinder core relative to the cylinder housing, in particular in two abutment positions.

The indication of the direction referred to in connection with the present invention, such as "radial", "axial", "tangential" or "circumferential", generally relates to the cylinder axis of the cylinder. The terms "tangential" and "circumferential" are synonymously used.

In addition, the invention utilizes a bullet-shaped collar arranged in a surprisingly simple manner for axially fixing the cylinder core to the cylinder housing to form a rotational abutment for limiting a predetermined rotational angle range of the cylinder in cooperation with the cylinder housing. In terms of technical production, this can be achieved in a simple manner, in particular without additional components.

According to some embodiments, it is provided that the circlip is rotatably fixedly held on the cylinder core. Thus, the circlip rotates with the cylinder core.

According to another embodiment, the circlip has an abutment portion protruding radially and/or axially and engaging into a free space provided at the lock cylinder housing, which free space is delimited tangentially. In particular, the abutment portion of the circlip may protrude into the relevant free space of the lock cylinder housing in the radial direction, or in the axial direction, or in a combination of radial and axial directions (relative to the cylinder axis of the lock cylinder).

According to an embodiment, starting from the base of the spring collar, which has a substantially circular or sector-like shape (e.g. substantially C-shaped), the abutment portion may protrude axially in the direction of the front side of the cylinder core or cylinder shell, either directly or through a radially outwardly extending portion.

In this embodiment, the head is in the embodiments mentioned below, the circlip and the abutment portion of the circlip are preferably formed as an initial single piece part, i.e. the abutment portion of the circlip is integrally formed in a combined manner at the remaining portion of the circlip.

In this respect, the abutment portion may be angled, in particular at an angle of about 90 °, with respect to the rest of the circlip, the angled portion preferably being formed by a curvature, rather than for example by an edge. In particular, the connection region of the abutment portion (in particular axially oriented) with the remaining portion of the circlip (in particular radially oriented) may have a partially circular or partially elliptical profile, however, other curvatures are also possible. Due to this curvature, in particular in comparison with a 90 ° bend, the stability with respect to torsion forces is increased.

The abutment portion may extend in the axial direction over at least part of the thickness of the circlip. In some embodiments, the length of the abutment portion in the axial direction is preferably greater than the thickness of the circlip and is 1.5 to 4 times the total circlip thickness. Alternatively or additionally, in some embodiments, the length of the abutment portion in the axial direction may be greater than the clearance of the circumferential groove portion of the cylinder core housing the circlip, and when the axial clearance of the circumferential groove portion of the cylinder core is 1.5 times to 2 times.

According to an embodiment, the circlip with the abutment portion may be manufactured by a stamping and bending process in which the circlip with the abutment portion is stamped first and then the abutment portion is bent (such that the abutment portion is oriented axially with respect to the cylinder axis in the latter mounting position). However, the spring collar with the abutment portions may also be manufactured in a casting process (metal casting or plastic injection molding), or may be bent from a wire.

In particular, the free space of the cylinder shell may form a circumferential path delimited in a tangential direction, wherein the free space or the circumferential path of the cylinder shell extends over a predetermined circumferential angle and together with the tangential angle range of the abutment portion defines a possible rotational angle range of the cylinder core. In some embodiments, in particular, the free space or circumferential path may correspond to a sector of the hollow lock cylinder.

The free space or circumferential path of the cylinder housing may have at each tangential end a respective counter abutment or counter abutment which cooperates with an abutment of the circlip in the respective end position, in particular in the locking position or zero position on the one hand and in the open position or actuation position of the cylinder core on the other hand. Thus, depending on the direction of rotation, the abutment portion of the circlip abuts one or the other of the opposing abutments of the cylinder housing along the tangential free space.

Thus, in some embodiments, the free space of the plug housing extends between two opposing abutments of the plug housing that are tangentially spaced apart from each other. These opposing abutments may be integrally formed with the end face of the cylinder housing. In some embodiments, the opposing abutments can form raised portions relative to a generally extending plane of the end face of the plug housing.

According to another embodiment, the free space of the cylinder housing is formed as a recess of a substantially extending plane relative to the end face, which recess is provided at the end face of the cylinder housing and extends in the axial direction and in the tangential direction. For example, the free space may be formed by a cut-out introduced into the cylinder housing. The portion of the cylinder housing having the recess or cutout may be, for example, a wall of the cylinder housing, wherein in particular the recess may extend over the entire radial extent of the wall.

Alternatively, the free space or circumferential path may be defined by one or two axially and/or radially protruding opposing abutment portions of the cylinder housing.

As an alternative to the overall design at the circlip, the abutment portion may also be designed as a movable element, in particular an elastic or movable element, at the circlip. Thus, in some embodiments, an intermediate latch may also be provided during rotational movement in the direction of the opposing abutments, wherein a corresponding latching element, e.g. a recess, may be provided.

In other embodiments, the cylinder housing has an abutment portion which protrudes in the radial and/or axial direction and engages into a free space provided at the circlip, which is delimited in the tangential direction. In particular, the abutment portion of the plug housing may protrude into the associated free space of the circlip, in particular in the radial direction, or in the axial direction, or in a combination of radial and axial directions.

In particular, the free space delimited in the tangential direction may be formed by the relief portion of the circlip extending over a portion of the circumference. The free space or relief portion of the circlip extends over a predetermined circumferential angle and together with the tangential angular extent of the adjoining portion of the cylinder shell defines a possible rotation angle range of the cylinder core. The free space or release portion of the circlip may have a respective opposing abutment portion at each end that cooperates with an abutment portion of the cylinder housing in a respective end position of the cylinder core, i.e. in the locked or zero position or in the open or actuated position. The free space or the release portion of the circlip may be formed, for example, by a lateral opening, i.e. a slot-like opening, which is provided in the circumferential region of the circlip and at the same time makes it possible to plug the circlip in the radial direction on the cylinder core. In any case, such a slot-like opening in the circlip can optionally be slightly widened in the circumferential region of the circlip, so that a sufficiently large rotation angle range can be defined.

In some embodiments, the circlip has a secant portion that contacts a flat portion of the drive extension of the cylinder core to retain the circlip at the cylinder core in a rotationally fixed manner. Thus, a form fit between the cylinder core and the circlip is ensured, so that even larger forces or torques generated in the respective abutment positions by the rotational actuation of the cylinder core can be reliably guided from the cylinder core to the cylinder shell, and a play-free fit is also ensured.

According to an embodiment, the rotation abutment is configured such that one of two abutment positions of the cylinder core limiting the rotation angle coincides with the locking position of the cylinder core. The key can be removed from the key slot in this locking or zero position, in particular only in this locking or zero position. By means of this design, it is ensured that the pin, in particular the pin, can be lowered into the corresponding housing bore or housing recess, so that the key can be removed. Thus, a defined end position is provided for the cylinder core, so that an excessive rotation of the cylinder core as initially mentioned can be reliably prevented.

The predetermined rotation angle range of the cylinder core may advantageously be in total greater than 180 °, or equal to 180 °, or less than 180 °, in particular equal to 120 °. An angular range of less than 180 ° is sufficient for many applications. If a rotation angle range of 180 ° or more is provided, the lock cylinder can be configured as a so-called recodeable lock cylinder. With such a plug, it is also possible to adapt the plug to keys with different locking profiles by replacing the pin after initial assembly with the pin. In particular, it may be provided that the pins or core pins initially provided in the plug core are replaced by pins or core pins of different length. This process is also referred to as rekeying. Recodeable locks are described, for example, in document US6425274B 1. In such a recodeable lock cylinder, the cylinder shell has a groove-shaped recess or a plurality of individual holes on the upper side, i.e. at the side opposite the shell hole, enabling removal of the core pin from the cylinder core when the cylinder core is in a position rotated 180 ° relative to the locking or zero position. If the predetermined rotational angle range of the cylinder core is exactly 180 ° in total, and in particular this rotational angle position coincides with one of the abutment positions limiting the rotational angle, this recoding process or rekeying process is greatly simplified, since the cylinder core can be exactly rotated into the removal position for the core pin.

In some embodiments, the pin plug is configured as a pin plug, a plate plug, or a disc plug.

The spring collar can advantageously be made of stamped bent parts and/or of spring steel. However, as already mentioned, the spring collar can also be configured at least partially as a cast part, cast from plastic, or bent from a wire.

In some embodiments, it may be provided that the bullet-shaped collar is arranged at the end of the cylinder core remote from the key introduction opening of the key slot, in particular at the rear side of the cylinder core.

In some embodiments, it may be provided that the bullet-shaped collar is provided at a drive extension of the cylinder core that protrudes axially from the cylinder housing.

In some embodiments, it may be provided that the cylinder core has at least one circumferential groove portion in which the circlip engages to secure the cylinder core against axial movement relative to the cylinder.

In some embodiments, it may be provided that the spring collar is arranged outside the cylinder housing in the axial direction.

In some embodiments, it may also be provided that the circlip has a radial groove along which the circlip is elastically expandable to place the circlip on the cylinder core in a radial direction.

In some embodiments, it can be provided that the spring collar has a broad side, by means of which the spring collar is in contact with the axial end face of the cylinder housing.

Other embodiments of the invention result from the dependent claims, the description and the drawings. In this respect, those features which are not explicitly described as being combined may also be advantageously combined with each other.

Drawings

The present invention will be described below with reference to the embodiments and the accompanying drawings. In the drawings:

FIG. 1 shows a perspective view of a lock cylinder according to one embodiment in a locked position;

fig. 2 shows a perspective view of the lock cylinder in an open position;

fig. 3 shows an exploded perspective view of the lock cylinder;

fig. 4 shows a side view of a lock cylinder; and

fig. 5 shows a plan view of the upper side of the lock cylinder.

Detailed Description

Fig. 1 to 5 show a lock cylinder 10 according to an embodiment of the invention in different views. The lock cylinder 10 includes a cylinder housing 12 having a hollow cylindrical portion 20 and a lateral attachment portion 18 integrally adjoining the hollow cylindrical portion 20.

A plurality of shell apertures 14 are provided in the attachment portion 18 and extend into the interior of the cylindrical portion 20 (fig. 3).

The hollow cylindrical portion 20 has a plurality of access holes 16 in the form of radial passage holes introduced into the wall of the hollow cylindrical portion 20 in opposition to the shell holes 14.

The cylinder core 30 is accommodated in the hollow cylindrical portion 20 and is thereby rotatably supported in the cylinder housing 12 about a cylinder axis. In the assembled position, the cylinder core 30 is axially fixed by the circumferential collar portion 37 on the front side and the flat bullet-shaped collar 40 on the rear side. The circlip 40 is received in the circumferentially introduced groove portion 36 of the cylinder core 30. The cylinder core 30 also has a key slot 32 extending along the cylinder axis for receiving a key (not shown).

The rear end of the cylinder core 30 is configured to drive the extension 34, the drive extension 34 enabling the cylinder 10 to be coupled to a closure mechanism of a lock arranged downstream. In the assembled position, the drive extension 34 protrudes from the cylinder housing 12, i.e., the drive extension 34 protrudes on the axially rear end face of the cylinder housing 12.

The circlip 40 has a wide radial groove 44, which radial groove 44 enables the circlip 40 to be radially inserted onto the cylinder core 30. After the plug core 30 is inserted into the hollow cylindrical portion 20, the circlip 40 may be radially introduced into the groove portion 36 and the circlip 40 may be latched in the groove portion 36. Thus, the cylinder core 30 is fixed against axial movement in the direction of its front side relative to the cylinder housing 12.

In the region of the radial groove 44, a tangential portion 48 is formed at the circlip 40, the tangential portion 48 being in contact with the flat portion 38 formed at the drive extension 34, thereby rotationally fixedly coupling the circlip 40 to the cylinder core 30.

The recessed portion 36 of the cylinder core 30 need not be precisely circular, but may have a radially inward recess into which a radially inward raised portion of the circlip 40 engages to secure the circlip 40 against unintended radial removal from the cylinder core 30.

A tangentially extending free space 24 formed by a radial recess of the cylinder housing 12 is provided on an axial end face of the cylinder housing 12, which faces the drive extension 34 in the region of the hollow cylindrical portion 20.

The abutment portion 42 is integrally formed at the circlip 40 and extends slightly in the radial direction and then is mainly remote from the other portions of the circlip 40 in the axial direction. The connection region of the abutment portions or the transition from the radial extension direction to the axial extension direction preferably has a part-circular or quarter-elliptical profile. Thus, the outer side of the curve formed may be rounded without forming sharp edges.

Thus, the abutment portion 42 protrudes axially from the other portion of the circlip 40 and engages into the free space 24 of the lock cylinder housing 12. The abutment portion 42 moves within the free space 24 of the cylinder housing 12 upon rotation of the cylinder core 30, wherein the two opposing abutment portions 26a, 26b, which delimit the free space 24 in the circumferential direction, form a rotational abutment with the abutment portion 42 of the circlip 40 and thus limit the possible rotational angular range of the cylinder core 30 rotationally fixedly coupled to the circlip 40.

The two abutment positions defined by the abutment portion 42 of the circlip 40 and the opposing abutments 26a, 26b of the cylinder housing 12 are selected such that the cylinder core 30 is in the locked or zero position when the abutment portion 42 abuts one of the opposing abutments 26 a. In this locked or zero position of the cylinder core 30, the key can be removed from the keyway 32. In addition, the two abutment positions are selected such that the cylinder core 30 is in an open or actuated position when the abutment portion 42 of the circlip 40 abuts the other opposing abutment 26b of the cylinder housing 12. In the illustrated embodiment, the range of rotation angles is limited to about 120 °.

If the circlip 40 is released from the plug core 30 or the abutment portion 42 of the circlip 40 is pushed back from the free space 24 of the plug housing 12 (by a sufficiently resilient arrangement), the plug core 30 may be rotated beyond the range of rotation angles defined by the rotational abutment and in particular the plug core 30 may be brought into a position rotated 180 ° relative to the locked or zero position such that, according to one embodiment, pins or core pins (not shown) accommodated in the plug core 30 for recoding purposes may be removed through the access holes 16 and replaced with pins or core pins of different lengths.

According to another embodiment, the above-described position for recoding lock cylinder 10 can also be accessed without removing circlip 40 if the extension angle range of free space 24 extends correspondingly (to 180 ° or more). However, in this variant, it should be ensured by the closing mechanism of the associated lock arranged downstream that this recoding position is not inadvertently approached, otherwise (depending on the installation position of the plug 10) it cannot be excluded that the pin falls out accidentally.

Description of the reference numerals

10. Lock core

12. Lock core shell

14. Shell hole

16. Access hole

18. Attachment portion

22. Cylindrical portion

24. Free space

26a, 26b facing abutment

30. Lock core

32. Key groove

34. Drive extension

36. Groove portion

37. Collar portion

38. Flat part

40. Spring retainer ring

42. Adjacent portion

44. Radial groove

48. A tangent section.

Claims

1. A lock cylinder comprising a cylinder housing and a cylinder core rotatably supported in the cylinder housing about a cylinder axis and secured against axial movement relative to the cylinder housing by means of a bullet-shaped collar, wherein the cylinder core has a key slot for the introduction of an associated key, wherein the cylinder core is rotatable by the introduced key between a locking position and an opening position, and wherein the cylinder has a plurality of pin tumblers which are actuatable by the associated key,

wherein the bullet-shaped retainer and the cylinder housing together form a rotational abutment for limiting the rotational angle of the cylinder core within a predetermined rotational angle range,

wherein the spring collar is rotatably, fixedly held on the cylinder core, wherein the spring collar has an abutment portion which protrudes in the radial and/or axial direction,

characterized in that the abutment portion engages into a free space provided at the cylinder housing, which is delimited in a tangential direction, wherein the free space of the cylinder housing is formed as a recess relative to an end face of the cylinder housing, which recess is provided at the end face of the cylinder housing and extends in the axial direction and in the tangential direction.

2. The lock cylinder of claim 1, wherein the abutment portion extends in the axial direction over at least a portion of the thickness of the circlip.

3. The lock cylinder of claim 1, wherein a length of the abutment portion in the axial direction is greater than a thickness of the circlip.

4. The lock cylinder of claim 1, wherein the cylinder core has at least one circumferential groove portion into which the circlip engages to secure the cylinder core against axial movement relative to the cylinder shell, wherein the abutment portion has a length in the axial direction that is greater than the clearance of the circumferential groove portion.

5. The lock cylinder of claim 1, wherein the free space of the lock cylinder housing extends between two opposing abutments of the lock cylinder housing, the two opposing abutments being spaced apart from each other in the tangential direction.

6. The lock cylinder according to claim 1 or 2, wherein the circlip has a secant portion in contact with the flat portion of the drive extension of the cylinder core (30) to hold the circlip at the cylinder core in a rotationally fixed manner.

7. The lock cylinder according to claim 1 or 2, wherein the rotational abutment is configured such that one of two abutment positions limiting the rotational angle coincides with the locking position of the cylinder core.

8. The lock cylinder according to claim 1 or 2, wherein the predetermined range of rotation angles of the cylinder core amounts to less than 180 °.

9. The plug according to claim 1 or 2, wherein the pin tumbler is configured as a pin tumbler, a plate tumbler or a disc tumbler.

10. The lock cylinder of claim 1 or 2, wherein the circlip is formed as a stamped curved piece.

11. The lock cylinder of claim 1 or 2, wherein the circlip is provided at an end of the cylinder core remote from the key introduction port of the key slot.

12. The lock cylinder of claim 1 or 2, wherein the circlip is provided at a drive extension of the cylinder core that protrudes axially from the cylinder housing.

13. The lock cylinder of claim 1 or 2, wherein the circlip is provided outside the cylinder housing.

14. The lock cylinder of claim 1 or 2, wherein the circlip has a radial groove along which the circlip is elastically expandable to place the circlip on the lock cylinder core in a radial direction.

15. The lock cylinder of claim 1 or 2, wherein the circlip has a broad side through which the circlip contacts an axial end surface of the lock cylinder housing.