WO2012059094A1

WO2012059094A1 - Lock cylinder

Info

Publication number: WO2012059094A1
Application number: PCT/DE2011/075246
Authority: WO
Inventors: Matthias Löw
Original assignee: Huf Hülsbeck & Fürst Gmbh & Co. Kg
Priority date: 2010-10-08
Filing date: 2011-10-07
Publication date: 2012-05-10
Also published as: DE102011001055A1; EP2625355B1; EP2625355A1

Abstract

The invention relates to a lock cylinder (1), in particular for a motor vehicle, comprising a housing (2) in which a sleeve (3) with a cylinder core (4) that is received in said sleeve is rotatably mounted, said cylinder core (4) having spring-loaded tumblers (5) which form a positive engagement with recesses that are arranged in the sleeve (3) when a key is removed. The sleeve (3) is coupled to a coupling element (7) via a disengaging sleeve (6) within the housing (2). The coupling element (7) is mounted within the housing (2), and the coupling element (7) is connected to a mounting (14). At least one wall of the housing (2), a wall of the disengaging sleeve (6), and a wall of the coupling element (7) delimit a circumferential channel in a first housing section, a spring element being arranged in said channel. A second housing section that lies behind the first housing section in the key inserting direction has a smaller housing outer diameter than the outer diameter of the first housing section.

Description

lock cylinder

The invention relates to a lock cylinder, in particular for a motor vehicle, with a housing in which a sleeve with a received therein

Cylinder core is rotatably mounted, wherein the cylinder core spring-mounted

Has tumblers, which form a positive connection with the withdrawal of a key arranged in the sleeve recesses, and within the housing, the sleeve is coupled via a release sleeve with a coupling element, wherein the coupling element is mounted within the housing, and the coupling element is connected to a bearing ,

German Offenlegungsschrift DE3827418A1 discloses a lock cylinder with an axial freewheel. In this designed as a torsion coil spring is arranged in a cylindrical housing. When a

improper object, such as a screwdriver, in the

Locking cylinder is introduced, a decoupling of a coupling element takes place with a cylinder core. During the rotation of the cylinder core by means of the

Screwdriver moves a sleeve, a release sleeve in the direction of insertion of the screwdriver, which is coupled to the coupling element. The spiral spring is subjected to pressure. When the screwdriver is out of the Is pulled out cylinder core, relaxes the coil spring and ensures that the coupling element is set back into its original position. When choosing the coil spring, however, a larger space must be provided within the housing of the lock cylinder. A taper of the housing outer diameter in the direction of insertion is therefore excluded because the size of the coil spring does not allow this. In particular, the rear portion of the lock cylinder housing may not have a large outer diameter, as a retractable in a door window pane inside the door

arranged locking cylinder touched. You could do that inside the door

arranged lock cylinder move further towards the ground level down or reduce the size of the viewing window, so that the disc has a smaller size. Both constructions are detrimental to the user since, on the one hand, the field of view due to the smaller disc is reduced and, on the other hand, the lock cylinder would be located at a user-unfriendly height on the door.

The object of the invention is therefore to provide a lock cylinder, which has a compact design and a comfortable closing and

Opening operation for the user ensures.

The invention is achieved in that at least one wall of the housing, a wall of the release sleeve and a wall of the coupling element define a circumferential channel in a first housing portion, in which a spring element is arranged. The solution according to the invention has the advantage that the installation space of the lock cylinder housing is reduced and a compact design of the lock cylinder is ensured.

In a preferred embodiment of the invention, it is provided that a second housing section II arranged in the key insertion direction S behind the first housing section I has a smaller outer diameter 02 of the housing than the outer diameter di of the housing of the first housing Housing section I. This offers the advantage that contact with a retractable window pane arranged within a door is excluded with the housing of the lock cylinder. The windowpane, especially the

Viewing range of the windowpane is increased. At the same time the remains

Locking cylinder in the door at a comfortable height for the user, so that the user does not have to bend down to insert the key in the lock cylinder. Furthermore, reduce the material costs, since less material is needed to produce the metallic lock cylinder housing.

According to a further preferred embodiment, it is provided that the spring element is designed as a bending spring, in particular as a leaf spring or plate spring. The spiral spring is characterized in particular by its compact and small size. The spiral spring is ideal for use in the

Lock cylinder according to the invention, because thereby the space in the housing is further reduced. The use of the spiral spring, in particular a leaf spring or plate spring, is sufficient to achieve the required restoring forces, which put the coupling element back to its original position after the use of an improper object, for example a screwdriver. Furthermore, the production costs for such a bending spring are very low.

According to another preferred embodiment of the lock cylinder

provided that the bearing surface of an end region of the spiral spring and arranged on the wall of the housing support surface are formed complementary to each other. This embodiment has the advantage that the spiral spring is mounted securely within the channel and slipping is prevented in case of vibration of the door. When the bending spring is subjected to pressure, the force is distributed over the area of the bearing surface of the housing contacted by the end region of the spiral spring.

Very simple and inexpensive construction is when the spiral spring is formed as a ring on which at least two protruding from the plane of the ring wings are arranged. The protruding wings provide advantageously for a stable support of the spiral spring.

The construction of the lock cylinder is very inexpensive and reliable when the wings are arranged on the ring at an angle of γ 180 ° offset from one another. It has been shown that a spiral spring with two at an angle offset by 180 ° to each other arranged wings generates the necessary restoring forces to the coupling element after the use of an improper

To return the object to its original position.

The reliability of the spiral spring is further increased when the wings are arranged on the ring at an angle γ 180 ° offset from each other. In the case of three blades arranged at an angle γ of 120 ° relative to each other, it is ensured that, in the unlikely event of a breakage of one wing, the other two wings nevertheless ensure the theft protection since two wings are sufficient to produce the required restoring forces for the coupling element. Furthermore, the bending spring is stored more stable and secure in the channel on the three wings. A tilting of the spiral spring within the channel is therefore excluded.

According to a further preferred embodiment of the invention, it is provided that the angle α between a ring plane of the ring and the wing in the unloaded state of the spiral spring has a range of 42 ° to 48 °. This offers the advantage that an excessive bending of the wings is excluded. This prevents a breakage of the wings and at the same time the

required restoring forces ensured.

Very simple and inexpensive is the structure of the spiral spring, when the wings and the ring of the bending spring are integrally formed.

According to a further embodiment of the object of the invention

provided that the wings are U-shaped in their end region and the Form support surface of the spiral spring. Due to the U-shaped bearing surface of the wings in the end region a stable support of the spiral spring is achieved, especially when it is subjected to pressure.

According to a further preferred embodiment of the lock cylinder is provided that in the first housing section I within the housing, the housing has a corner-shaped area which serves as a support surface for the U-shaped end portions of the wings of the spiral spring. The corner region of the housing has two at an angle ß of 85 ° to 95 ° to each other arranged walls. If the wings of the spiral spring are supported in these corners, the forces of the spiral spring are distributed evenly on two walls. The wings are supported on both walls of the housing, so that the bending spring in the loaded state, especially in pressure, stored and arranged safely and stably in the corner.

The support of the spiral spring in the corner region of the housing is even more stable when in the loaded state of the spiral spring, the bearing surface of the U-shaped

End of the wing and the support surface of the corner-shaped area in

Are formed substantially complementary to each other.

According to another preferred embodiment of the invention, it is provided that a gap is provided between the spring element and the wall of the coupling element. This offers the advantage that with temperature fluctuations, the spring element can expand, without

In the figures, the invention is illustrated schematically using an exemplary embodiments. Show it:

Fig. 1 is a sectional view of a lock cylinder in a proper

Use, Fig. 2 sectional view of the lock cylinder in an improper

use

Fig. 3 is a plan view of a spiral spring having two wings

In Figures 1 and 2, an inventive lock cylinder 1 for a

Motor vehicle shown. In Figure 1, the lock cylinder 1 in a

Proper use shown.

A proper use is, if one with a the

Lock cylinder 1 associated with a proper key not shown in detail open with the lock cylinder 1 operatively connected lock or can close. In Figure 1 b, the lock cylinder 1 is shown in improper use.

An improper use exists if one with the lock cylinder 1 not assigned key (wrong key) or a tool, especially with a screwdriver, not shown in detail with the

Lock cylinder 1 operatively connected lock tries to open by force.

The lock cylinder 1 shown in Figures 1 and 2 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 on withdrawal of a key not shown in the

Cylinder core 4 with arranged in the sleeve 3 not shown recesses form a positive connection. 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 arranged inclined to an axis A at an angle. The inclined plane 8 is in operative connection with one of

Release sleeve 6 associated second inclined plane. 9 The cylinder core 4 has a pin 10 which has a projection 1 1. The projection 1 1 opens into a receptacle 12 of 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 pivot rod 15. Within the coupling element 7, a coil spring 16 is arranged, which as

Return spring for the lock cylinder is used. The walls of the housing 2 serve as a guide surface for the coupling element 7. Between the

Coupling element 7 and the wall of the housing 2 is a narrow gap, which may be provided with a lubricant to the friction between the

Wall of the housing 2 and the coupling element 7 to reduce.

The housing 2 has a first housing section I and a second housing section

Housing section II on. The second housing section II arranged in the key insertion direction S behind the first housing section I has a smaller outer diameter 02 of the housing 2 than the outer diameter di of the housing 2 of the first housing section I. In the first housing section I, the wall 17 and wall 18 of the housing 2 form the wall 19 of the coupling element 7 and the wall 20 of the release sleeve 6 a disposed within the housing 2 circumferential channel 21, in which the spring element 22 designed as a bending spring is arranged. In order to compensate for temperature fluctuations, a small gap is provided between the spring element 22 and the wall 19 of the coupling element 7, as can be seen in the enlargement in FIG. Alternatively, instead of the leaf spring could

Diaphragm spring are used. The spiral spring is in the present

Embodiment designed as a leaf spring, which is shown in more detail in Figure 3. The leaf spring is formed as a ring 23, on which two elastic wings 24 are arranged offset at an angle γ 180 ° to each other. It would also be possible to provide the ring 23 with three wings 24, which are offset from one another at an angle γ of 120 °. The wings 24 and the ring 23 are integrally formed of a metallic material. As shown in Figures 1 and 2, the wings 24 protrude from the ring plane at an angle α of about 45 °. The angle α should preferably be between 42 ° to 48 °. In Figure 1 and Figure 2 it can be seen that the wings 24 of the leaf spring in its end region U-shaped

are formed. The U-shaped end portions of the leaf spring form the

Bearing surface of the spiral spring. A bearing surface 25 of the end of the

Biegefeder and arranged on the wall 17,18 of the housing 2

Support surface 26 are aligned complementary to each other, so that the leaf spring is stably supported. In the first housing section I, the housing wall 17,18 has a corner-shaped area, which serves as a support surface for the U-shaped

End areas of the wings is used. It could even be provided for stable mounting of the leaf spring, that the U-shaped end portions of the wings form a bearing surface, which would be substantially complementary to a arranged in the corner-shaped area support surface.

The following explains the operation of the lock cylinder. In Figure 1, 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 arranged in the sleeve 3, not shown

Recesses led out, 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. It can also be seen from FIG. 1 that the projection 1 1 engages with the receptacle 12 and thus a form-locking connection is made between the cylinder core 4 and the coupling element 7. Since the cylinder core 4 via a positive connection with the

Coupling element 7 is connected, rotates upon actuation of the key about the axis A thus also the coupling element 7. The coupling element 7 is in turn connected via the groove 13 with the bearing 14 form-fitting, so that the bearing 14 accordingly also about the axis A. rotates. Serving for actuating the lock, not shown, rotary rod 15 is connected to the bearing 14th

positively connected, so that the rotary rod 15 in a

Rotational movement is offset about the axis A. The rotary rod 15 is then actuated the castle. 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 closing operation during proper use is designed analogously to the opening process described above.

In the following, the case is considered in Fig. 2 when the lock cylinder 1 is used with an improper object. An improper object is, for example, a tool, in particular a screwdriver, or else not a lock cylinder 1

In the case of improper use of the lock cylinder, the improper object is introduced into the cylinder core 4. It is also possible that the cylinder core 4 is clamped in with a pair of pliers from the outside without a lock In each case, the cylinder core 4 is forcibly rotated about the axis A. In contrast to the proper use, depending on the shape of the improper object, at least one tumbler 5 remains in the recess (not shown) Sleeve 3, so that the sleeve 3 and the cylinder core 4 rotatably connect to each other.When the improper object about the axis A by about 10 °, the range should preferably be selected between 5 ° to 20 ° in rotation, then rotates the sleeve 3 is also involved with the axis A. The release sleeve 6 is moved in the direction d it pressed 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 with the

Coupling element 7 is positively connected, the release sleeve 7 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 projection 1 1 of the cylinder core 4 with the receptacle 12 of the coupling element 7 is disengaged. The coupling element 7 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 22 arranged between coupling element 7 and bearing 14 becomes

compressed and loaded on pressure, as long as the improper object remains in the cylinder core 4. Here, the spring element 22, as already mentioned above, is arranged in the channel 21.

When the improper object is pulled out of the cylinder core 4 again, the spring element 22 relaxes and pushes the

Coupling 7 back to its original position, as shown in Figure 1. 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.

LIST OF REFERENCE NUMBERS

1 lock cylinder

2 housings

3 sleeve

4 cylinder core

5 tumblers

6 release sleeve

7 coupling element

8 first inclined plane

9 second inclined plane

10 cones

1 1 lead admission

groove

camp

rotating rod

Spiral spring (return spring)

Wall housing

Wall coupling element

Wall release sleeve

channel

spring element

ring

wing

Bearing surface spring element

Support surface Wall of the housing

Claims

claims

1 . Lock cylinder (1), in particular for a motor vehicle, with a

Housing (2) in which a sleeve (3) is rotatably mounted with a cylinder core (4) received therein, wherein

the cylinder core (4) spring-mounted tumblers (5), which in the withdrawal of a key with in the sleeve (3) arranged

Recesses form a positive connection, and within the housing (2) the sleeve (3) via a release sleeve (6) is coupled to a coupling element (7), wherein the

Coupling element (7) is mounted within the housing (2), and the coupling element (7) with a bearing (14) is connected, characterized in that at least one wall (17,18) of the housing (2), a wall (20 ) of the release sleeve (6) and a wall (19) of the

Coupling element (7) has a circumferential channel in a first

Limit housing portion in which a spring element (22) is arranged.

Second lock cylinder (1) according to claim 1, characterized in that a key insertion direction S behind the first housing section I arranged second housing section II a smaller

Outer diameter 02 of the housing (2) than that

Outer diameter di of the housing (2) of the first housing section I.

3. lock cylinder (1) according to claim 1 or 2, characterized in that the spring element (22) is designed as a spiral spring, in particular as a leaf spring or disc spring.

4. lock cylinder (1) according to one of claims 1 to 3, characterized

in that the support surface (25) of an end region of the spiral spring and a support surface (26) arranged on the wall (17, 18) of the housing (2) are designed to be complementary to one another.

5. lock cylinder (1) according to claim 4, characterized in that the bending spring is formed as a ring on which at least two projecting from the plane of the ring wings (24) are arranged.

6. lock cylinder (1) according to claim 5, characterized in that the wings (24) on the ring at an angle γ of 180 ° offset from one another.

7. lock cylinder (1) according to claim 6, characterized in that the wings (24) are arranged on the ring at an angle γ of 120 ° offset from each other.

8. lock cylinder (1) according to one of claims 4 to 7, characterized

characterized in that the angle α between a ring plane of the ring (23) and the wing (24) in the unloaded state of the spiral spring has a range of 42 ° to 48 °.

9. lock cylinder (1) according to one of claims 4 to 8, characterized

characterized in that the wings (24) and the ring (23) of the bending spring are integrally formed.

10. lock cylinder (1) according to one of claims 4 to 9, characterized

characterized in that the wings (24) are U-shaped in their end region and form the bearing surface (25) of the spiral spring.

1 1. Lock cylinder (1) according to one of claims 4 to 10, characterized

in that in the first housing section I within the housing (2) the housing wall has a corner-shaped area which serves as a support surface (26) for the U-shaped end regions of the wings (24) of the spiral spring.

12. lock cylinder (1) according to one of claims 4 to 1 1, characterized

characterized in that in the loaded state of the spiral spring the

Support surface (25) of the U-shaped end portion of the wings (24) and the support surface (26) of the corner-shaped area substantially

are formed complementary to each other.

13. lock cylinder (1) according to one of claims 2 to 12, characterized

characterized in that between the spring element (22) and the

Wall (19) of the coupling element (7) is provided a gap.