EP2494130B1 - Lock cylinder - Google Patents

Description

The invention relates to a lock cylinder specified in the preamble of claim 1. Art.

In the German Offenlegungsschrift DE3827418A1 is disclosed a lock cylinder with an axial freewheel. In this lock cylinder, the coupling element 17 is provided for receiving the bearing 13, wherein the bearing 13 serves to receive a rotary rod 20. Therefore, the helical compression spring 11 must be disposed between the housing 2 and the coupling element 17. Furthermore, it is then necessary that the return spring 14 encloses the bearing in the head of the lock cylinder. This lock cylinder requires a large cylinder housing and leads to problems with a small space requirement.

WO2006 / 097476 discloses a lock cylinder 10 disclosed which comprises a housing 14 arranged in a cylinder core 12 for receiving tumblers. A sleeve 16 is disposed between the cylinder core 12 and the housing 14. The sleeve 16 has recesses 42, which are in operative connection with projections 40 of a release sleeve 28, as in FIG. 1 shown. On the release sleeve 28 in turn is a coupling element 26, which is connected to the bearing 24. If, for example, a screwdriver inserted into the lock cylinder 10 and the cylinder core 12 is rotated, the tumblers are in the sleeve 16. Subsequently, the cylinder core 12 is rotated and thus the sleeve 16. The release sleeve 28 is translationally displaceable only in the axial direction A1 and is pressed by the sleeve 16 in the direction of the bearing 24. The projections 40 of the release sleeve 28 are pushed out of the recesses 42 of the sleeve 16, so that the projections 40 are located on a circular ring of the sleeve 16. Thereby, the release sleeve 28 by the length of the projections 40 in the direction of Camp 24 moves. Consequently, then the coupling element 26 moves in the direction of the bearing 24. In this case, the cylinder core 12 is decoupled from the coupling element 26 and a movement of the bearing 24 alone by the screwdriver is excluded. In order to be able to open a lock associated with the bearing 24 nevertheless, it is possible with another tool, such as a pair of pliers, to grip the bearing 24 and rotate it. This is prevented by that the projections 41 of the release sleeve 28 are located in the recesses 43 of the bearing 24, as described above. For this purpose, the projections 41 are guided laterally past the coupling element 26. In order to ultimately prevent rotation of the bearing 24 by the further tool, ribs 38A and 38B are supported in the corresponding grooves of the housing 14 such that rotation is precluded. To accommodate the ribs 38A and 38B, the grooves in the housing 14 must be provided, which in turn increase the diameter of the housing 14. A compact lock cylinder can thus not be provided.

Generic lock cylinder, such as. B. DE3827418A1 . EP1193359A1 . FR2882771A1 . EP0647752A2 are also known from the prior art. These lock cylinders require a large cylinder housing and lead to problems with a small space requirement.

The object of the invention is therefore to provide a lock cylinder which has a compact design.

The invention is solved by the characterizing part of patent claim 1.
The solution according to the invention has the advantage that, in contrast to the prior art, the housing of the lock cylinder is reduced. The fact that the spring element is now arranged between the coupling element and the bearing, in contrast to that in the DE3827418 Locking cylinder described the space between the inner wall of the housing of the lock cylinder and the coupling element available to accommodate other components of the lock cylinder there. In this case, it lends itself to advantageously, the return spring, as in the DE3827418 described to arrange in this area. The bearing can be shortened according to the amount of length of the return spring, whereby the total length of the lock cylinder is reduced. Consequently, the material costs for the lock cylinder are lowered and a compact design of the lock cylinder is provided.

In a preferred embodiment of the invention it is provided that the coupling element or the bearing has a receiving chamber, which serves to receive the spring element. This technical measure ensures that the spring element is securely mounted in the coupling element and falling out of the spring element is prevented.

The overall size of the lock cylinder is further reduced when a further spring element is provided, which is in operative connection with the coupling element and surrounds the coupling element.

By this further spring element, which is used in the space won, is advantageously, preferably in the form of a return spring, the cylinder core of the lock cylinder returned after the opening operation or closing back to its original position to the next opening and closing a comfortable To get access.

Very simple is the structure when the further spring element is disposed within the housing between the inner wall of the housing and the outer wall of the coupling element.

The construction of the lock cylinder is very inexpensive if the further spring element is designed as a spiral spring.

The space of the housing is further reduced when the spring element is formed of an elastomeric material, wherein the coupling element or the bearing have a lower elasticity than the spring element.

The construction of the lock cylinder is very inexpensive if the spring element is designed as a spiral spring or plate spring.

According to an alternative embodiment of the lock cylinder, the spring element is designed as a buffer. Very easy to manufacture is the buffer, if this is cuboidal or spherical or ellipsoidal shaped.

According to a further preferred embodiment of the lock cylinder is provided that the spring element of a thermoplastic elastomer (TPE), in particular Santoprene, or natural rubber (NR), or nitrile rubber (NBR), in particular foam rubber, or ethylene-propylene-diene rubber (EPDM ) is trained. When using these materials, the elasticity of the spring element is sufficiently high to cause improper insertion Object in the cylinder core to ensure decoupling of the cylinder core with the coupling element.

According to a further preferred embodiment of the invention, it is provided that during proper use of the lock cylinder at least one cavity between the side walls of the receiving chamber and the spring element is provided. In order to ensure a decoupling of the cylinder core with the coupling element when inserting an improper object into the cylinder core, the spring element is subjected to pressure. In this case, the spring element is compressed and the cavity then serves as a memory for receiving the displaced material of the spring element, in particular in the selection of an elastic buffer, which is formed for example of TPE, this is advantageous.

Fig. 1a

einen Schließzylinder gemäß einer ersten Ausführungsform bei einem ordnungsgemäßen Gebrauch

Fig. 1b

den Schließzylinder gemäß der ersten Ausführungsform bei einem unsachgemäßen Gebrauch

Fig. 1c

den Schließzylinder ohne einen Zylinderkern gemäß der ersten Ausführungsform geschnitten durch die Achse X-X in Fig. 1a bei einem unsachgemäßen Gebrauch

Fig. 2a

den Schließzylinder gemäß einer zweiten Ausführungsform bei einem ordnungsgemäßen Gebrauch

Fig. 2b

den Schließzylinder gemäß der zweiten Ausführungsform bei einem unsachgemäßen Gebrauch

In the figures, the invention is illustrated schematically with reference to two embodiments. Show it:

Fig. 1a

a lock cylinder according to a first embodiment in a proper use

Fig. 1b

the lock cylinder according to the first embodiment in an improper use

Fig. 1c

the lock cylinder without a cylinder core according to the first embodiment cut through the axis XX in Fig. 1a with improper use

Fig. 2a

the lock cylinder according to a second embodiment in a proper use

Fig. 2b

the lock cylinder according to the second embodiment in an improper use

In the FIGS. 1a, 1b and 1c a lock cylinder 1 according to a first embodiment is shown. In FIG. 1a the lock cylinder 1 is shown in a proper use.
A proper use is when you can open a close not shown with the lock cylinder 1 operatively connected lock with a proper key associated with the lock cylinder 1 or close. In FIG. 1b the lock cylinder 1 is shown in improper use.
Improper use is when you with a lock cylinder 1 not assigned key (wrong key) or a tool, in particular with a screwdriver, not shown in detail with the lock cylinder 1 operatively connected lock trying to open.
The in the FIGS. 1a and 1b shown lock cylinder 1 has a housing 2, in which a metallic sleeve 3 is rotatably supported with a cylinder core 4 received therein. The cylinder core 4 has spring-mounted tumblers 5, which form a positive connection upon withdrawal of a key, not shown, from the cylinder core 4 with recesses not shown in the sleeve 3, not shown. Within the housing 2, the sleeve 3 is coupled via a release sleeve 6 with a coupling element 7.
For this purpose, the sleeve 3 has, at its end directed towards the coupling element 7, a first inclined plane 8 which is inclined relative to an axis A at an angle α (see FIG Figure 1c ). The inclined plane 8 is in operative connection with a release sleeve 6 associated second inclined plane 9, which is arranged inclined to the axis A by an amount of the angle β. The amount of the angle α in this embodiment is the same as the amount of the angle β. Alternatively, the amount of the angle α could also be unequal to the amount of the angle β.

The cylinder core 4 has a pin 10, which has a recess 11. The recess 11 serves to receive a bolt 12, which is arranged on the coupling element 7. The coupling element 7 is connected via a groove 13 with a bearing 14 for receiving a trained for actuating a lock rotary rod 15 which is mounted on a further buffer element 16. The buffer element 16 formed of an elastic material, in particular Santoprene, is received in the bearing 14 and serves to compensate for tolerances when the rotary rod 15 is set in motion during the opening or closing operation. Furthermore, the coupling element 7 has a receiving chamber 17, which serves for receiving an ellipsoidal elastic spring element 18 designed as a buffer. The spring element 18 is thus arranged between the coupling element 7 and the bearing 14. Alternatively, the bearing 14 could be provided with a receiving chamber 17 for receiving the spring element 18, and the spring element 18 could be spherical or cuboid. There is also the alternative possibility, the spring element 18 as a compression spring or coil spring or plate spring or rubber-metal spring, such as a disc spring under parallel thrust or a sleeve spring under axial thrust form.
As in FIG. 1a shown, the proper use of the lock cylinder 1, at least one cavity 19 is provided between the side walls of the receiving chamber 17 and the spring element 18, which in improper use, when the spring element, as in FIG. 1b is charged to pressure, as memory is used to displace the material of the spring element. The spring element 18 in this embodiment comprises a thermoplastic elastomer (TPE), in particular Santoprene. It is also possible as a material Natural Rubber (NR), or nitrile rubber (NBR), in particular a foam rubber, or ethylene-propylene-diene rubber (EPDM). In addition, according to the invention, the coupling element 7 also comprises a pin 21, which in the case of improper use of the lock cylinder 1 in a housing 2 as a groove formed opening 22 engages and the coupling element 7 rotatably locks. Furthermore, the coupling element 7 is formed with a helical spring further spring element 23 in operative connection, which is arranged within the housing 2 between an inner wall 24 of the housing 2 and an outer wall 25 of the coupling element 7.
The following explains the operation of the lock cylinder. In FIG. 1a the lock cylinder 1 is shown in the context of proper use. When a proper key is inserted into the cylinder core 4, the tumblers 5 are led out of the recesses not shown in the sleeve 3, whereby the cylinder core 4 can be set in rotation about the axis A. During an opening or closing operation, the cylinder core 4 is rotated by approximately 45 ° with the aid of a key inserted into the cylinder core 4. Of the FIG. 1a can also be seen that the bolt 12 is in engagement with the recess 11 and thus a positive connection between the cylinder core 4 and the coupling element 7 is made. Since the cylinder core 4 is connected via a positive connection with the coupling element 7, upon actuation of the key about the axis A thus also the coupling element 7 rotates. The coupling element 7 is in turn positively connected via the groove 13 to the bearing 14 so that Accordingly, the bearing 14 also rotates about the axis A. The serving for actuating the lock, not shown rotary rod 15 is positively connected to the bearing 14, so that the rotary rod 15 is set in a rotational movement about the axis A. The rotary rod 15 then actuates lock. The movement of the release sleeve 6, which allows only an axial direction of movement in the axial direction A, is prevented in a proper use. The first inclined plane 8 of the sleeve 3 and the second inclined plane 9 of the release sleeve 6 remain in their position.
The closing operation during proper use is designed analogously to the opening process described above.

The following is in FIG. 1b the case is considered when the lock cylinder 1 is used with an improper object. An improper object is, for example, a tool, in particular a tool Screwdriver, or even a not the lock cylinder 1 associated "wrong" key with which the opening of the lock is not possible. In case of improper use of the lock cylinder, the improper object is introduced into the cylinder core 4. It is also possible that you clamp with a pair of pliers from the outside of the cylinder core 4, without introducing a tool in the cylinder core. In the cases mentioned, in any case, the cylinder core 4 is forcibly rotated about the axis A. In contrast to the proper use remains depending on the shape of the improper object at least one tumbler 5 in the not shown recess of the sleeve 3, so that the sleeve 3 and the cylinder core 4 rotatably connect with each other. If now the improper object about the axis A by about 10 °, the range should preferably be selected between 5 ° to 20 °, set in rotation, then the sleeve 3 also rotates about the axis A. The first inclined plane 8 of the sleeve 3 slides along the second inclined plane 9 of the release sleeve 6 along and presses the release sleeve 6 in the direction of the bearing 14, wherein the release sleeve 6 is set only in along the axis A in motion. A rotational movement of the release sleeve 6 is excluded. Since the release sleeve 6 is positively connected to the coupling element 7, the release sleeve 6 is also moved in a longitudinal movement along the axis A to the bearing 14. The cylinder core 4 remains in its position and does not shift along the axis A, so that takes place during a movement of the coupling element 7, a decoupling between the cylinder core 4 and the coupling element 7. The decoupling arises because the pin 12 of the coupling element 7 with the recess 11 of the cylinder core 4 is disengaged. The coupling element moves accordingly along the axis A towards the bearing 14, only in the longitudinal direction. During the movement of the coupling element 7, the spring element 18 arranged between coupling element 7 and bearing 14 is compressed and subjected to pressure, namely as long as the improper object remains in the cylinder core 4. Here, the spring element 18, as already mentioned above, is arranged in the receiving chamber 17. In the FIG. 1a shown cavities 19 are at a Improper use now available as a memory to accommodate the material of the formed as an elastic buffer spring member Furthermore, during a movement of the coupling element 7 along the axis A towards the bearing 14, the pin 21 of the coupling element 7 is guided into the opening 22 arranged inside the housing 2. A rotation of the coupling element 7 in an improper use of the lock cylinder 1 is excluded. Due to the measures described, it is now impossible to operate the rotary rod 15, because for a decoupling between the cylinder core 4 and the coupling element 7 has taken place, and the other can not with another on the rotary rod 15 attacking tool, such as with a pliers, the rotary rod 15 are rotated to open the lock about the axis A, because the bearing is positively connected via the groove 13 with the coupling element 7. As already mentioned above, a rotation of the coupling element 7 is excluded due to the positive connection of the pin 21 with the opening 22.
When the improper object is pulled out of the cylinder core 4 again, the spring element 18 relaxes and pushes the coupling element 7 back into its starting position, as in FIG. 1a is shown. The cavities 19 are released in the release sleeve 6 again and the pin 21 is led out of the opening 22. Due to the return movement of the coupling element 7 along the axis A in the direction of the cylinder core 4, due to the positive connection of the coupling element 7 with the release sleeve 6 on the inclined planes 8,9 of the cylinder core 4 is moved back to its original position. The spring element 18 is then again in a pressure-free state to frictional forces between the bearing 14 and housing 2, in particular at the point AX (see FIG. 1a ) to reduce.

In the FIGS. 2a and 2b a second embodiment is shown. The operating principle corresponds to that in the FIGS. 1a and 1b illustrated first embodiment. Different here is the use of another Spring element 18 ', specifically a spring element 18' designed as a plate spring. The plate spring 18 'is designed as a plate spring package, which comprises mutually juxtaposed spring assemblies. Alternatively, the plate spring could also be layered in the same direction.

LIST OF REFERENCE NUMBERS

1

lock cylinder

2

casing

3

shell

4

cylinder core

5

tumblers

6

release sleeve

7

coupling member

8th

first inclined plane

9

second inclined plane

10

spigot

11

recess

12

bolt

13

groove

14

camp

15

rotating rod

16

another buffer element

17

receiving chamber

18.18 '

spring element

19

cavity

21

pen

22

opening

23

another spring element

24

Inner wall housing

25

Outer wall coupling element

Claims (11)

1. Lock cylinder (1) with a housing (2) in which a sleeve (3) with a cylinder core (4) accommodated therein is mounted rotatably and the cylinder core (4) has spring-mounted tumblers (5) which combine with recesses arranged in the sleeve (3) to create a form fit when a key is withdrawn, and the sleeve (3) is coupled to a coupling element (7) inside the housing (2) via a release sleeve (6), wherein the coupling element (7) is mounted inside the housing (2), and the coupling element (7) is connected to a mounting (14), wherein at least one resilient spring element (18, 18') is arranged between the coupling element (7) and the mounting (14), wherein the resilient spring element (18, 18') is constructed so as to be sufficiently deformable to guarantee that the cylinder core (4) is decoupled from the coupling element (7) if an improper object is used to create an operative connection with the cylinder core (4), characterized in that the coupling element (7) comprises a pin (21), wherein the pin (21) of the coupling element (7) is guided into an opening (22) arranged in the housing (2) when the coupling element (7) moves along an axis A towards the mounting (14), so that a rotation of the coupling element (7) is entirely impossible if the lock cylinder (1) is misused.
2. Lock cylinder (1) according to Claim 1, characterized in that the coupling element (7) or the bearing (8) includes an receiving chamber (17) which serves to accommodate the spring element (18, 18').
3. Lock cylinder (1) according to Claim 1 or 2, characterized in that a further spring element (23) is provided, which is in operative connection with the coupling element (7) and surrounds the coupling element (7).
4. Lock cylinder (1) according to Claim 3, characterized in that the further spring element (23) is arranged inside the housing (2) between the inner wall of the housing (2) and the outer wall of the coupling element (7) .
5. Lock cylinder (1) according to Claim 3 or 4, characterized in that the further spring element (23) is embodied as a coil spring.
6. Lock cylinder (1) according to any one of Claims 1 to 5, characterized in that the spring element (18, 18') is made from an elastomer, wherein the elasticity of the coupling element (7) or the mounting (14) is lower than that of the spring element (18, 18').
7. Lock cylinder (1) according to any one of Claims 1 to 6, characterized in that the spring element (18, 18') is embodied as a coil spring or a cup spring.
8. Lock cylinder (1) according to any one of Claims 1 to 6, characterized in that the spring element (18, 18') is designed as a damping device.
9. Lock cylinder (1) according to Claim 8, characterized in that the damping device is constructed in a cuboid shape or a spherical shape or an ellipsoid shape.
10. Lock cylinder (1) according to Claim 8 or 9, characterized in that the spring element is made from a thermoplastic elastomer (TPE), particularly santoprene, or natural rubber (NR), or nitrile rubber (NBR), particularly sponge rubber, or ethylenepropylene-diene-monomer (EPDM) rubber.
11. Lock cylinder (1) according to any one of Claims 1 to 10, characterized in that during proper use of the lock cylinder (1) at least one cavity (19) is provided between the sidewalls of the receiving chamber (17) and the spring element (18, 18').

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