FI90579B - Cylinder lock-key combination and key for this - Google Patents

Description

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The present invention relates to a cylinder lock key combination of the type mentioned in the type definition of claim 1.

These types of locks can be used in a wide variety of conditions.

In certain cases, there is a need to prevent the locking cylinder from being turned back towards the locking or unlocking position after turning the key by a certain angle with the key inserted towards the locking or unlocking position, i. in the opposite direction to the original direction of rotation 15.

This is the case, for example, with a storage compartment or a similar coin lock, where turning the key by a certain angle from the initial position when the lock is open causes the coin placed in the lock to become funded, i.e. falls down into the coin box of the lock device.

If the person handling the lock - without having completed the rotation leading to the locking position - then 25 turns the key back to the initial position, which sometimes happens in practice, the coin becomes funded too early, i.e. a new coin is needed to lock the tray. When this happens, the supposed tray user usually becomes very irritated.

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When an attempt is made to break the lock open, the lock cylinder is often moved slightly forwards and backwards by means of a circle, while the different pairs of pins are brought into position on the dividing plane 35 between the lock cylinder and the surrounding lock housing.

It would be very advantageous to provide a lock which would effectively make such breaking open.

Different types of locks require varying degrees of rotation of the lock cylinder between the locked and open positions.

5 Thus, certain locks require, for example, rotation to 90 °, others to rotation to 180 ° and others to rotation to 360 °.

10 Thus, in order to make it more difficult to recirculate the "return latch" of the lock cylinder, it can be assumed that it will become more or less complicated depending on the type of lock cylinder to be used.

U.S. Pat. No. 3,425,248 (Duval) and FR-A-2,388,966 (Gruslin) disclose examples of previously known cylinder locks in which the gripping member on the back of the key is adapted to allow axial displacement of the latch element. However, these known solutions 20 are primarily intended to provide burglary protection by preventing the lock cylinder from rotating as long as the wrong type of key has been inserted into the lock.

EP-A-0 149 484 (Neiman) discloses a cylinder lock in which the lock cylinder cooperates with a pivotable, spring-loaded lever arm to prevent the key from being pulled out before the lock is locked.

Other examples of the current state of the art can be found in U.S. Pat. No. 3,216,230 (Falk) and U.S. Pat. No. 3,404,548 (Keefer), both of which disclose a cylinder lock with a flexible latch element for making it more difficult to open. to improve safety 35.

Accordingly, it is an object of the present invention to provide a device 909079 which, by simple means, makes it possible to prevent the lock cylinder of the cylinder lock from being rotated backwards, regardless of the angle of rotation of the lock cylinder between the open and lock position 5.

Another object is to provide a cylinder lock in which it is simply possible to determine in advance how much rotation angle the lock cylinder must perform between the open position 10 and the locking position - or vice versa - before the lock cylinder anti-rotation function is to be activated.

Another object is to provide a key combination of cylinder lock-15 which makes it more difficult to break so that, by turning the lock cylinder during the opening movement, the lock cylinder is locked so that the inserted peg can no longer be removed.

A further object of an embodiment of the invention is to provide a coin lock in which it is ensured that after the rotation has taken place to the extent that the coin has become funded, it is no longer possible to rotate the lock cylinder back and the rotation to the locked position must be completed.

These and other objects are met by a combination according to the present invention as set forth above and having the essential features set forth in the characterizing portion of claim 30.

The latch element shown can in practice be a very simple and inexpensive detail which does not substantially increase the manufacturing cost of the lock. The same applies to the notch in the lock housing 35, the notch formation on the circumferential or jacket surface of the lock cylinder.

4 90579 Thus, it is possible to provide a latch arrangement by simple means, which without problems offers great choices, e.g. with respect to the angle by which the lock cylinder must be rotated before the latch arrangement 5 is to be activated or how large the recoil angle must be before the locking takes place.

It is also possible to select the direction of rotation as desired, as the invention is equally applicable to locks which are rotated clockwise between the locking and unlocking positions, as well as to those locks in which the direction of rotation between the two positions is opposite.

The invention can further be applied to different connections for different purposes, for example in accordance with what has been presented above in connection with the object of the invention.

The flexible latch element is preferably shaped as set out in claim 2. This element is then, despite its simplicity, very reliable, which has been found on the basis of recommended practical experiments. Although the element is thin and small in size, a large force can be applied to the lock cylinder in the anti-return position without breaking the latch element 25.

The protrusion is preferably laser welded to the main part of the latch element.

The inclined surface ensures that the protrusion of the latch element, without any appreciable braking effect against the rotational movement, snaps down to the blocking position in which reversal of the locking cylinder is prevented. By changing the length of the bevel - or in other words the angle of inclination of this - it is also possible to influence the extent of the rotation before the projection snaps down to the blocking position.

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The formation on the surface of the lock cylinder for the projection of the latch element may, for example, in a design suitable for a coin lock, be in the form shown in Fig. 3.

5

The rotational position of the locking cylinder can then correspond to a locking position in which the key can be removed when the projection is in a position adjacent to the inclined surface.

10 Alternatively, in the case of a lock type other than a coin lock, said position may correspond to an opening position.

Claims 5 to 8 show other embodiments according to the principle of the invention which have been applied to alternative types of locks which require further rotation of the lock cylinder, for example by an angle of 180 °, 360 ° or more between the opening and locking positions, and vice versa.

Some of these embodiments are particularly suitable for preventing the cylinder lock assembly of the invention from breaking open.

For the best reliability, it is ensured that the lock is missing from the part of the lock cylinder which, in rotation of 180 ° or more, passes the groove of the lock housing in which the latch element together with the projection is located.

Other objects and features of the invention will become apparent from the following description of some embodiments of the invention. In connection with the description, reference is made to the accompanying drawing, in which: Fig. 1 shows the cylinder lock key combination according to the invention disassembled, 6 90579

Fig. 2 shows a partially sectioned side view of the lock housing with the latch element in its rest position.

Fig. 3 shows a view corresponding to Fig. 2 after the key 5 has been inserted when the latch element has been moved to its active position.

Figures 4 and 5 show the lock cylinder removed from the lock housing according to Figure 1 directly from below, respectively. Viewed after turning 90 ° counterclockwise 10 °.

Fig. 6 is a section along the line VI-VI in Fig. 5 and shows the lock cylinder and its circumferential notch formation.

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Fig. 7 shows the lock housing and the lock cylinder seen from the front in the initial position.

Fig. 8 shows a bottom view of the lock cylinder 20 removed from the lock housing in the initial position shown in Fig. 7.

Figures 9, 11 and 13 show vertical sections of the lock cylinder and the surrounding lock housing, with the lock cylinder in different active positions and the sections taken through the lock cylinder at the same location as section VI-VI of Figure 5.

Figures 10, 12 and 14 show a lock cylinder without a lock housing surrounding it, Figures 9, 11 and 7, respectively. 13 in the corresponding positions.

Fig. 15 shows a modified lock cylinder to be rotated more than 90 ° to the return blocking position.

Figures 16 and 17 show another modified lock cylinder in different rotational positions.

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Finally, Fig. 18 shows an example of a lock cylinder with a special formation to prevent breaking.

Fig. 1 shows a view of a disassembled cylinder lock 1 with 5 lock housings 2, a lock cylinder 3 and a key 4 provided with a code 4a.

The bore 5 for the lock cylinder 3 of the lock housing 2 is provided at its lower part with an axial groove 6 adapted to receive a latch element 7 with a centrally located projection 7a. The latch element consists of an elongate spring element which is somewhat curved in shape. The second end is bent to form a stop 7b for a helical spring 8, against the effect of which the latch element 7 can move axially in the groove 6. The end opposite the latch element is provided with a slight bend 7c. The curved shape of the latch element allows it to perform a radial resilient movement in the groove 6.

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The latch element 7 is adapted to be moved in the groove 6 by the action of the key 4. For this purpose, the back part 4b of the key 4 is provided with a gripping member 4c adapted to come into contact with the protrusion 7a 25 of the latch element 7.

The gripping element 4c is surrounded by notches 10, 11, of which the front 10 receives the projection 7a when the key is moved forward in the key 9 housing 9 in the lock cylinder 3.

The rear door 11 joins the gripping member 4c through a relatively gentle arc, which allows the key to easily pass the protrusion 7a of the locking member when the key 35 is pulled out of the key housing 9.

The groove 6 is displaced by about 10 ° from a vertical plane of central symmetry passing through the housing 2 and the lock 890579. For the following reasons, the gripping member 4c in the key will then act on about half of the protrusion 7a of the latch member 7 when the key is moved in the key-5 housing 9. After the insertion is completed,

During the final stage of the key insertion movement, the gripping element 4c moves the latch element 7 in the axial direction against the action of the spring 8, as shown in Fig. 3.

Figure 2 shows the position of the latch element before inserting the key into the key housing 9.

In Figures 4 and 5, the lock cylinder 3 is shown directly below, respectively. After rotation to 90 ° as seen from the position of Fig. 4 20.

The section according to Fig. 6 shows the lock cylinder 3 and its circumferential notch groove formation, generally indicated by reference numeral 15. In the embodiment 25 shown in Figs. 4-14, the lock cylinder is adapted to be rotated 90 ° between its locking and opening position.

Fig. 6 illustrates the angles of rotation A, B, C, D and E between a plurality of parts of the notch groove formation extending along the circumference of the lock cylinder 3. Thus, Fig. 6 illustrates in which respective rotational positions of the lock cylinder the different parts of the formation start and end. As shown above, Fig. 7 shows a front view of the cylinder lock, while Figs. 9, 11 and 13 show sections 35 of the lock cylinder from the same point as section VI-VI of Fig. 5.

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The different sections show the lock cylinder in the position illustrated by the lower view with a higher number, i. Fig. 9 shows a section of the locking cylinder blades in the position according to Fig. 10, Fig. 10 in the position according to Fig. 12, etc.

Figures 7 and 8 show the lock cylinder in the rest position with the key removed, while the lock cylinder in Figures 9-14 shows the key inserted in different rotational positions.

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The protrusion 7a of the latch element 7 performs the following movements when inserting the key 4 and turning the lock cylinder 3 with the key: 1) The rest position of the protrusion 7a with the key pulled out - when the cylinder lock 2 compared to the groove 6 is shown in Fig. 7.

2) Figure 10 shows the position of the protrusion 7a when the key 4 is fully inserted into the key housing 9. The latch element 7 together with the protrusion 7a has then moved axially to the left against the action of the spring 8 so that the protrusion is aligned with the rectilinear part 15a with. It can be seen from both Fig. 9 and Fig. 10 that the key gripping member 4a acts on about half of the protrusion 7a.

3) Figures 11 and 12 show the position of the projection 7a after rotation of the lock cylinder by an angle C of Figure 6 (the angle of which may vary). In the embodiment shown, this position corresponds to about 100 °, i. angle A plus 90 °.

The protrusion 7a is then momentarily located in the position shown in solid lines in Fig. 12, but will immediately move under the action of the spring 8 to the position shown in the axial direction to the right in dotted lines. In this case, a clear clicking sound is heard when the projection encounters the corresponding restriction of the notch formation 15.

4) Figures 13 and 14 illustrate what happens if the reversal of the lock cylinder 3 from the position according to Figures 11 and 12 is performed counterclockwise.

As indicated above, reference numeral 15c denotes an oblique part in the lock cylinder, which means that when the lock cylinder is turned counterclockwise, the projection 7a will move radially outwards until it snaps down to the blocking position shown in Fig. 14, which corresponds to the notch portion 15 15d. In this position, the latch element 7 locks the lock cylinder against clockwise recirculation. The only possibility to continue the movement is to complete the counterclockwise rotation of the lock cylinder to the initial position according to Figures 7 and 8, where the projection 7a is released from its connection with the forming part 15d. In this position, the latch element can again move in the axial direction under the action of the key gripping member 4c as shown in Figs. 9 and 10.

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In the position shown by the dashed lines in Fig. 11, the locking operation may be completed, so that the key can be removed.

It can be seen from Fig. 12 that the projection 7a will move in the opposite direction in the axial direction against the direction of insertion of the key with an already smaller angle of rotation than that corresponding to the angle C at the lock cylinder. Thus, already from this predetermined rotational position, the reversal of the lock cylinder 35 is prevented as shown.

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In the blocking position according to Fig. 14, the projection 7a is located in the axial direction behind the gripping member 4c, i.e. in key notch 11. As long as the rotational movement is not completed, the cylinder lock pins prevent the key from being pulled out. 5 In the locking position, in the opening position, the key can be pulled out without the blocking effect of the projection 7a, because the latch element will be radially outward in the groove 6.

As indicated above, the principle has different applications for different types of locks, where the angles A-E indicated in Fig. 6 can be of different sizes.

An application related to the coin lock of the storage compartment will be presented below. Such a cylinder lock is known to be arranged so that the lock in the initial position is open and the key is held in the lock cylinder by means of a pin.

After the desired items have been placed in the storage slot-20 slot and the coin has been dropped into the lock coin slot, the lock cylinder is rotated to the locked position, after which the key can be removed. The coin will be funded just before the lock cylinder rotation is completed.

In connection with such locking devices, it often happens that the rotation of the lock cylinder is not completed, but the person handling the lock rotates the lock cylinder incompletely towards its locking position, after which it is rotated back. In this case, it is possible that the coin 30 will have time to be funded just before the reversal movement. The person must then insert a new coin into the coin slot before the storage compartment can be locked.

The principle of the invention applied to such a coin lock .... 35 makes it impossible to rotate the lock cylinder back from the anti-return position shown in Fig. 14. The only option is to complete the rotation to the full locking position. Just before this, the coin will be funded.

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Figures 15-18 show lock cylinders with 5 other types of circumferential notch formations for other applications of the principle of the invention.

Figures 15 and 16 thus show an example of a locking cylinder-10 blade with a notch formation 15 in which the locking cylinder must be rotated 180 ° or more between the locking and opening positions.

Fig. 17 shows another example of a lock cylinder 15 with another type of notch formation 15, which should normally be able to be used as a regular lock when using a key whose back part 4b is not provided with a gripping member 4c.

This structure is chosen when it is desired that one of the alternatives to the lock should be provided with an anti-roll-back function and, as another alternative, to act as an ordinary lock, in which case the key does not have a gripping member 4c.

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The spring element 7 together with the projection 7a must then be in the initial or rest position, displaced in the axial direction to the right, i.e. the protrusion should not extend all the way to the groove formation 15. This may require a modified spring-30 element and / or a compression spring 8.

Fig. 18 shows a structure in which the lock cylinder 3 is provided with a formation 15 which effectively prevents the lock from being opened by means of a breaking tool. The groove formation 15 is shown in Fig. 18 with two additional notches 15f, respectively. 15g. The protrusion 7a is shown in solid lines in notch 15f and in dotted lines in notch 15g. In order to release the spring element 13 90579 in connection with a burglary attempt, the projection 7a must be aligned with the groove 15a. This is made more difficult because said notches are valeuria.

It should be clear from the above that the principle of the invention defined in the claims can be applied in many different ways, whereby the latch element can co-operate with different notch formations formed on the circumferential surface of the lock cylinder.

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The angle of rotation between the positions in which the various parts of this configuration are activated can vary widely and ultimately depends on these desires and the actual angle of rotation required to rotate the lock cylinder 15 from its locking, opening position.

In this connection, it should be noted that in the embodiment shown in connection with Figures 9-14, the protrusion 7a will hardly settle in the position shown in full lines in Fig. 12. As soon as the protrusion 7a leaves the groove 15a, the spring element 7 together with the protrusion 7a will move to the right. or by the action of a compression spring 8. In this case, you will hear a clear snapping sound.

The lock according to the invention comprises a key having the features set out in claim 12.

Such a key can be made of a key blank of the type set out in claim 13.

Claims (9)

14 90 579 A cylinder lock key combination comprising: 5 a) a lock cylinder (3) located in the bore (5) of the lock housing (2), b) a row of lock pins (3a) located in the bore (5) of the lock housing (5) and in the holes in the lock housing , 10 d) a key (4) to be inserted into the key housing (9) in the lock cylinder (3), the upper part of which is provided with a code (4a) intended to co-operate with the lock pins, e) a lock housing (2) for the lock cylinder (3) 15 a latch member (7) disposed in a recess (6) in communication with the bore (5) in cooperation with a notch formation (15) formed on the circumferential surface of the lock cylinder to prevent rotation of the lock cylinder from an optional predetermined position in a predetermined direction 20b. ) to move the latch member (7) formed in the axial direction against the action of the spring in the insertion direction of the key, characterized in that the latch element (7) is radially resilient and that part of the formation (15) on the surface of the lock cylinder comprises an inclined surface (15c) with a stop (15d) in a locking position where the latch element (7) prevents rotation of said lock cylinder. Combination according to Claim 1, characterized in that the latch element (7) comprises an elongate, curvedly flexible element (7) arranged in an axial groove (6) formed in the lock housing (2), preferably with a centrally located projection (7a) which acts 35 together with a notch formation (15) formed on the circumferential surface of the lock cylinder (3). 15 90 579 Combination according to Claim 1 or 2, characterized in that the projection (7a) of the latch element (7) is guided at a predetermined angle by the part (15a) of the formation (15) on the circumferential surface of the lock cylinder after axial displacement of the gripping element (4c). to a position in which the projection is released for displacement by means of a spring action in the axial direction in the opposite direction to the insertion direction of the key (4) to a position in the vicinity of which said inclined surface (15c) 10 begins. Combination according to Claim 3, characterized in that the rotational position of the locking cylinder (3) corresponds to a locking or unlocking position in which the key can be removed when the projection 15 is in a position close to the inclined surface (15c). Combination according to Claim 1 or 2, characterized in that the locking cylinder (3) can still be rotated by 20 angles in the original direction of rotation. towards the opening position in which the key can be removed, from the position in which the projection (7a) is located in the vicinity of the inclined surface (15c) when the locking cylinder is in the locking position. 25 Combination according to claim 5, characterized in that during said rotation the projection is guided by a groove (15a) formed in the circumferential surface of the lock cylinder, and that the lock cylinder (3) does not enter its locking or unlocking position until after 180 ° or 360 ° or 30 angles of rotation. . Combination according to Claim 6, characterized in that the part of the lock cylinder (3) which, during the rotational movement 35, bypasses the notch or groove (6) in the lock housing (2) in which the latch element (7) together with the projection (7a) is located. not equipped with a locking pin. 90579 BC Combination according to one of Claims 2 to 7, characterized in that the notch formation (15) is provided with at least one fracture-preventing part (15f; 15g) for receiving the projection (7a) of the spring element (7). 5 A key for a combination according to any one of claims 1 to 8, which key is provided with a back part with a coded leaf including a gripping member (4c) for contacting a latch element 10 (7) which can move axially on the locking cylinder - in the groove (6) connected to the bore (5) of the lock housing (2) for the blades (3), preferably via a projection (7a) arranged in the middle of the latch element, characterized in that the gripping element (4c) is surrounded by notches (10, 11) 15, of which the front door (10) is adapted to receive the projection (7a) of the radially flexible latch element (7) when the key is moved forward in the lock cylinder (3), while the rear door (11) joins the gripping member (4c) through a relatively gentle arc so that the key can pass the latch member a projection (7a) when the key is pulled out of the lock cylinder. 17 90579