CN112709497B - Lock cylinder - Google Patents

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 cylinder

Technical field

The invention relates to a lock core, which includes a lock core shell and a lock core core part. The lock core core part is rotatably supported in the lock core shell around the lock core axis and fixed by a spring retaining ring to prevent axial movement relative to the lock cylinder housing, wherein the lock cylinder core has a keyway for introducing an associated key, wherein the lock cylinder core is rotatable between a locked position and an open position by an introduced key, and wherein the lock cylinder core There are a plurality of pin pins actuatable by associated keys.

Background technique

Such lock cylinders are generally known and are used in many different designs of locks, for example in door locks, padlocks or two-wheeler locks, to name just a few examples of applications. There are different designs such as contour cylinders, round cylinders, oval cylinders, semicircular cylinders, double cylinders or knob cylinders.

Depending on the type of lock, the locked position of the lock cylinder may also be designated as the zero position, and the open position as the actuated position. Thus, for example, in the case of a door lock with a bolt preloaded by a spring, the bolt may be in its rest position defined by the preload, in the locked or zero position of the lock cylinder, and said bolt may be in The open or actuated position of the lock cylinder retracts into the lock housing against preload. Padlocks and two-wheeler locks generally have essentially similar modes of operation. Here, the lock bolt is moved to the release or open position to open the lock via the lock cylinder, so that the closing hoop or pusher previously locked by the lock bolt is released for removal from the body of the lock. After 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 key slot. With some locks of this type, the bolt may be preloaded by spring force in the direction of the locked position. In particular, a so-called automatic function may be provided, in which reclosing of the lock without key actuation is performed by inserting the closing hoop or pusher into the lock body so that the closing hoop or pusher latches onto the deadbolt. . With such a lock, it can also be provided, in a manner generally associated with the invention, that only in the locking position or the zero position of the lock cylinder core, or only in the locking position or the zero position of the lock cylinder core and also in the lock cylinder core. The key can be taken out from the lock core only when the core is rotated 180° relative to the lock core.

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

In particular, this may occur with the lock cylinder core being slightly over-rotated when the lock cylinder core is turned back to the locking or zero position, where the key can be removed from the lock cylinder. In lock cylinders with tumbler pins, this can lead, for example, to the fact that the core holes in the core of the lock cylinder are no longer precisely aligned with the housing holes in the lock cylinder shell, so that the tumbler pins each movably received therein are blocked. And cannot move. In particular, the core pin, ie the tumbler pin housed in the core of the lock cylinder, cannot be lowered into the housing hole and the key cannot therefore be removed from the core of the lock cylinder or from the keyway.

The operating comfort is thus limited since before the key can be removed, the key first has to be rotated slightly again in the direction of the zero position.

Considerable problems may arise with cylinder locks having different configurations of pin tumblers such as plate tumblers or disc tumblers.

Contents of the invention

Therefore, an object of the present invention is to provide a lock cylinder capable of comfortable operation.

In the lock cylinder according to the invention, it is provided that the circlip forms together with the lock cylinder shell a rotational abutment for limiting the rotational angle of the lock cylinder core to a predetermined rotational angle range. The rotation angle abutment portion can limit the rotation angle of the lock cylinder core relative to the lock cylinder shell, especially in two abutment positions.

References to directions herein, such as "radial", "axial", "tangential" or "circumferential", generally refer to the cylinder axis of the lock cylinder. The terms "tangentially" and "circumferentially" are used synonymously.

In addition, the present invention utilizes a circlip arranged in a surprisingly simple manner for axially fixing the lock cylinder core to the lock cylinder shell to form a rotational abutment with It cooperates with the lock cylinder shell to limit the predetermined rotation angle range of the lock cylinder. In terms of technical production, this can be achieved in a simple way, especially without add-ons.

According to some embodiments, provision is made for the snap ring to be held rotatably fixed on the lock cylinder core. Therefore, the circlip rotates together with the core of the lock cylinder.

According to another embodiment, the snap ring has an abutment portion which projects radially and/or axially and engages in a free space provided at the lock cylinder housing, which free space is defined tangentially. In particular, the abutment portion of the snap ring may project into the relative free space of the lock cylinder housing in a radial direction, or in an axial direction, or in a combination of radial and axial directions (relative to the lock cylinder axis of the lock cylinder). in space.

Depending on the embodiment, starting from the base of the circlip having a substantially circular or sectoral shape (e.g. substantially C-shaped), the abutment portion may be located directly or via a radially outwardly extending portion on the lock cylinder core. Or protrude axially in the direction of the front side of the lock cylinder housing.

In this embodiment, the head is In the embodiment mentioned below, the circlip and the adjoining portion of the circlip are preferably formed as initially single-piece components, ie the adjoining portion of the circlip is combined The way is integrally formed at the remainder of the retaining ring.

In this aspect, the abutment portion may be angled relative to the remainder of the circlip, in particular at an angle of approximately 90°, the angled portion being preferably formed by a curvature rather than, for example, an edge. In particular, the connection area of the (especially axially oriented) abutment part to the remaining part of the (especially radially oriented) retaining ring may have a partially circular or partially elliptical contour, however other curvatures are also possible possible. Due to this curvature, especially compared to a 90° bend, the stability with respect to torsional forces is increased.

The abutment portion may extend axially 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 snap ring and is 1.5 to 4 times the total snap ring 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 lock cylinder core that accommodates the snap ring, and is equal to the circumferential groove of the lock cylinder core. 1.5 times to 2 times the axial clearance of the part.

According to an embodiment, the snap ring with the abutment portion can be produced by a punching and bending process in which the snap ring with the abutment portion is first punched and then the abutment portion is bent (so that the abutment portion is in the rear mounting position oriented axially relative to the axis of the lock core). However, circlips with abutment portions can also be produced in a casting process (metal casting or plastic injection moulding) or can be bent from metal wire.

In particular, the free space of the lock cylinder shell may form a circumferential path defined in the tangential direction, wherein the free space or the circumferential path of the lock cylinder shell extends for a predetermined circumferential angle and together with the tangential angle range of the adjacent portion defines the lock Possible rotation angle range of the core. In some embodiments, in particular, the free space or circumferential path may correspond to a sector-shaped portion of the hollow lock cylinder.

The free space or circumferential path of the lock cylinder housing may have at each tangential end a corresponding opposing abutment portion or opposing abutment portion that is in contact with the spring shape at the corresponding end position. The adjoining parts of the retaining ring cooperate, in particular, on the one hand in the locked or zero position, and on the other hand in the open or actuated position of the lock cylinder core. Thus, depending on the direction of rotation, the abutment portion of the snap ring abuts along the tangential free space one or the other opposite abutment portion of the lock cylinder housing.

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

According to another embodiment, the free space of the lock cylinder housing is formed as a substantially extending plane recess relative to the end face, said recess being provided at the end face of the lock cylinder housing and extending in the axial and tangential directions. For example, the free space can be formed by a cutout introduced into the lock cylinder housing. The part of the lock cylinder housing with the recess or cutout can be, for example, a wall of the lock cylinder housing, wherein, in particular, the recess can extend over the entire radial extent of this wall.

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

As an alternative to an integral design on the snap ring, the abutment part can also be designed as a movable element, in particular an elastic or movable element, on the snap ring. Thus, in some embodiments, an intermediate latch may also be provided during a rotational movement in the direction of the opposing abutment, wherein corresponding latch elements, such as recesses, may be provided.

In other embodiments, the lock cylinder housing has an abutment portion projecting in a radial direction and/or an axial direction and engaging in a free space provided at the snap ring, the free space being delimited in a tangential direction . In particular, the abutment portion of the lock cylinder housing can protrude into the associated free space of the snap ring, in particular in a radial direction, or an axial direction, or a combination of radial and axial directions.

In particular, the free space delimited in the tangential direction may be formed by the release portion of the circlip extending over part of the circumference. The free space or release portion of the snap ring extends over a predetermined circumferential angle and, together with the tangential angular range of the adjoining portion of the lock cylinder housing, defines the possible rotational angular range of the lock cylinder core. The free space or release portion of the snap ring may have at each end a corresponding opposing abutment portion in a corresponding end position of the lock cylinder core, i.e. in the locked or zero position or in The open or actuated position cooperates with an adjoining portion of the lock cylinder housing. The free space or release portion of the snap ring can be formed, for example, by lateral openings, ie groove-like openings, which are arranged in the circumferential area of the snap ring and at the same time make it possible to move the snap ring in the radial direction. Stuff it on the core of the lock cylinder. In any case, such a groove-like opening in the snap ring can optionally be slightly widened in the circumferential area of the snap ring, so that a sufficiently large rotational angle range can be defined.

In some embodiments, the snap ring has a secant portion that contacts a flat portion of the drive extension of the lock cylinder core to hold the snap ring at the lock cylinder core in a rotationally fixed manner. . Thus, a form fit between the lock cylinder core and the circlip is ensured, so that even greater forces or torques generated in the respective abutment positions by the rotational actuation of the lock cylinder core can be reliably transferred from the lock cylinder The core is guided into the lock cylinder housing and also ensures a gap-free fit.

According to an embodiment, the rotational abutment is configured such that one of the two abutment positions of the lock cylinder core, which limits the rotation angle, coincides with the locking position of the lock 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. Through this design, it is ensured that the pin bolt, and in particular the pin pin, can be lowered into the corresponding housing hole or housing recess, so that the key can be removed. Therefore, providing the lock cylinder core with a defined end position makes it possible to reliably prevent the initially mentioned over-rotation of the lock cylinder core.

The predetermined rotation angle range of the lock cylinder core may advantageously 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 greater is set, the lock cylinder can be configured as a so-called recodeable lock cylinder. With such a lock cylinder, the lock cylinder can also be adapted to keys with different locking profiles by replacing the pin pins after initial assembly with the pin pins. In particular, it can be provided that the pins or core pins originally provided in the core of the lock cylinder are replaced by pin pins or core pins of different lengths. This process is also known as rekeying. Recodeable locks are described, for example, in document US6425274B1. In this recodeable lock cylinder, the lock cylinder shell has a groove-shaped recess or a plurality of separate holes on the upper side, that is, at the side opposite to the shell hole. When the lock cylinder core is in the locking position relative to Or when the zero position is rotated 180°, the core pin can be removed from the core of the lock cylinder. If the predetermined rotation angle range of the lock core core is exactly 180° in total, and in particular, this rotation angle position coincides with one of the adjacent positions that limit the rotation angle, then since the lock core core can be rotated exactly for The core pin is removed from the position, so the recoding process or rekeying process is greatly simplified.

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

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

In some embodiments, it may be provided that the snap ring is arranged at an end of the lock core core remote from the key introduction opening of the keyway, in particular at a rear side of the lock core core.

In some embodiments it may be provided that the snap ring is arranged at a drive extension of the lock cylinder core extending axially from the lock cylinder housing.

In some embodiments, it may be provided that the lock core core has at least one circumferential groove portion in which the snap ring engages to secure the lock core core to prevent the lock core core from moving relative to the lock. Axial movement of the core.

In some embodiments, it can be provided that the spring-shaped retaining ring is arranged in the axial direction outside the lock cylinder housing.

In some embodiments, it may also be provided that the retaining ring has a radial groove along which the retaining ring can elastically expand to place the retaining ring on the lock core in a radial direction. Ministry.

In some embodiments, it can be provided that the snap ring has a wide side through which the snap ring comes into contact with the axial end face of the lock cylinder housing.

Further embodiments of the invention result from the dependent claims, the description and the drawing. In this respect, features whose combination is not explicitly described may also be advantageously combined with one another.

Description of drawings

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

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

Figure 2 shows a perspective view of the lock cylinder in the open position;

Figure 3 shows an exploded perspective view of the lock cylinder;

Figure 4 shows a side view of the lock cylinder; and

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

Detailed ways

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

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

The hollow cylindrical part 20 has a plurality of inlet openings 16 in the form of radial passage holes introduced into the wall of the hollow cylindrical part 20 opposite the shell opening 14 .

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

The rear end of the lock cylinder core 30 is configured as a drive extension 34 which enables the lock cylinder 10 to be coupled to the closing mechanism of the lock provided downstream. In the assembled position, the drive extension 34 protrudes from the lock cylinder housing 12 , that is, the drive extension 34 projects on the axial rear end face of the lock cylinder housing 12 .

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

In the area of the radial groove 44 , a tangential portion 48 is formed on the circlip 40 , which comes into contact with a flat portion 38 formed on the drive extension 34 , thereby coupling the circlip 40 in a rotationally fixed manner. to the lock core core part 30.

The grooved portion 36 of the lock cylinder core 30 need not be exactly circular, but may have a radially inward recess into which the radially inward raised portion of the snap ring 40 engages to secure it. Spring retaining ring 40 prevents inadvertent radial removal from the lock cylinder core 30 .

A tangentially extending free space 24 formed by the radial recess of the lock cylinder housing 12 is provided on an axial end face of the lock cylinder housing 12 facing the drive extension 34 in the region of the hollow cylindrical part 20 .

The abutment portion 42 is integrally formed at the snap ring 40 and extends slightly in the radial direction and then primarily in the axial direction away from the other portions of the snap ring 40 . The connecting region of the abutment portion or the transition from the radial extension to the axial extension preferably has a partially circular or quarter-elliptical contour. Thus, the outer sides of the formed curve can be rounded without forming sharp edges.

The abutment portion 42 thus projects axially from the other portions of the snap ring 40 and engages in the free space 24 of the lock cylinder housing 12 . The abutment portion 42 moves within the free space 24 of the lock cylinder housing 12 when the lock cylinder core 30 rotates, wherein two opposing abutments 26 a , 26 b circumferentially delimit the free space 24 with the abutment of the snap ring 40 The portions 42 together form a rotational abutment and thus limit the range of possible rotational angles of the lock cylinder core 30 that is rotationally fixedly coupled to the snap ring 40 .

The two abutment positions defined by the abutment portion 42 of the snap ring 40 and the opposing abutment portions 26a, 26b of the lock cylinder housing 12 are selected such that when the abutment portion 42 abuts one of the opposing abutments 26a, the lock cylinder core portion 30 In the locked or zero position. In this locked or zero position of the lock cylinder core 30 , the key can be removed from the key slot 32 . Additionally, the two abutment positions are selected such that when the abutment portion 42 of the snap ring 40 abuts the other opposing abutment portion 26b of the lock cylinder housing 12, the lock cylinder core 30 is in the open or actuated position. In the embodiment shown, the rotation angle range is limited to approximately 120°.

If the snap ring 40 is released from the lock cylinder core 30 or (by a sufficiently resilient configuration) the abutment portion 42 of the snap ring 40 is pushed back from the free space 24 of the lock cylinder housing 12 , the lock cylinder core 30 can be Rotation beyond the range of rotational angles defined by the rotational abutment and in particular may bring the lock cylinder core 30 into a position rotated by 180° relative to the locked or zero position, so that, according to one embodiment, it is accommodated for recoding purposes in The tumbler or core pin (not shown) in the lock cylinder core 30 can be removed through the access hole 16 and replaced with a pin or core pin of a different length.

According to another embodiment, the above-mentioned position for recoding the lock cylinder 10 can also be approached without removing the snap ring 40 if the angular extent of the free space 24 is correspondingly extended (to 180° or more). In this variant, however, it should be ensured that this recoding position is not inadvertently approached by the closing mechanism of the relevant lock arranged downstream, otherwise (depending on the installation position of the lock cylinder 10), accidental falling out of the tumbler pin cannot be excluded Case.

Explanation of reference signs

10 lock cylinder

12 lock cylinder shell

14 shell holes

16 entry hole

18 Attachment parts

22 cylindrical part

24 free space

26a, 26b Opposing adjacent parts

30 lock cylinder core

32 key slot

34 drive extension

36 groove part

37 collar part

38 flat part

40 spring retaining ring

42 Adjacent parts

44 radial groove

48 Tangent part.

Claims (15)

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.