FI121191B - Key to a disc cylinder lock and disc cylinder lock - Google Patents

Description

TECHNICAL FIELD This invention relates to a cylinder lock and a key thereof. In particular, the invention relates to a cylinder lock having a le-5 hinge bar, i.e. a barrier cylinder lock and its key.

State of the art

In known disc-damper cylinder locks, such as in Fl 74320, disc discs are brought to the unlock position by turning the key. Combination surfaces 10 are milled on the key which, when the key is rotated, guide the baffle plates to rotate to a position where the recesses on the outer edge of the baffle plates are in a straight line. This will allow the bar to move into the recesses of the bar and the lock can be rotated open.

Fl 74320 discloses a key with four combination surface sets, whereby the key can be inserted into a corresponding cylinder in two positions (rotation of key 15 180 degrees about its longitudinal axis). Fl 94452 discloses another plate and its key. The key in this release contains two sets of combination pins on opposite sides of the key profile. GB 2322404, EP 0617184 and US 4127996 disclose other known solutions.

* .1. * The surfaces of the keys are subject to wear. As a result of the wear on the surfaces, the operation of the key and the lock • 20 · V deteriorates, causing malfunctions and possibly increasing the wear of the lock • · · · · · V cylinder. In particular, the outer surfaces of the key are exposed to abrasion. ' In addition, the surfaces by which the lock elements are rotated are subject to wear and tear • by the environment and by the disc hammering cylinder.The key wear ..... is faster in heavier use such as guards, service technicians and watchmen.

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Brief Description of the Invention 2

The object of the invention is to reduce the problems caused by the wear of the key. The objective is achieved in the manner set out in the main requirements. The dependent claims illustrate various embodiments of the invention. The inventive solution seeks to achieve minimal and uniform wear on the various combination surfaces of the combination surface of the key. When the combination surfaces wear out as smoothly as possible, the lock cylinder will work correctly despite the wear.

The key combination area for forming combination surfaces comprises a key 5 having a groove 5 in the direction of the key, the center of the groove 19 being deeper than the edge portions 20. The groove forms the outermost combination surfaces for the combination surface to be formed.

In a preferred embodiment, the groove 5 is concave in shape, with the contact surface 15 being curved. When the corresponding contact surface of the baffle key lock channel of the baffle cylinder lock is convex, the outermost combination surface forms a contact surface wider than the point of contact against the baffle contact surface. The other combination surfaces arranged to form contacts against the surfaces of the respective baffle plates form:.: V a dotted contact surface. Because the combination surface of the lowest groove is an • •:. * ·· 20 earthy combining surface, it is also the most exposed to environmental wear. In this case, the wider contact surface of the outermost combination surface • ·: the higher contact surface smoothes the wear load on the various combination surfaces.

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BRIEF DESCRIPTION OF THE DRAWINGS ··· In the following, the invention will be described in more detail with reference to FIGS. * 5 ** of the accompanying drawings, wherein: · FIG. 1 illustrates an example of a key according to the invention, ···

Fig. 2 illustrates an example of a key according to the invention and a blade barrel: · ♦:

Figure 3 illustrates an example of a key and a baffle plate according to the invention in a key-position,

Figure 4 illustrates an example of a key and a baffle plate according to the invention with the key turned against a baffle plate, Fig. 5 illustrates another example of a key and a baffle plate according to the invention with the key turned,

Figure 6 illustrates an example of a key and an O-bar in accordance with the invention, and

Figure 7 illustrates in more detail the profile of the inventive key and the shape of the handler.

Description of the Invention

Fig. 1 illustrates an example of a key 1 according to the invention, more specifically a key blank which has not yet been formed with a combination surface assembly 15 compatible with a particular disc-damper cylinder lock. (The blank can also serve as the actual key if the lock cylinder is arranged to work with the blank.) The key arm 2 is pivoted over the key 3 to unlock the disk lock cylinder. The arm 2 comprises a combination region 4 in the direction of the arm into which a combination surface can be provided. series. The combination surface set consists of several combination surfaces. • · · 20 combination surfaces can be achieved by milling the combination area. Usually, • · · *. * Is referred to as combination milling. The example key in Figure 1 has two combination ·· · areas that are short sides of the key arm profile and part of the ends of the long sides along a known length of arm 2. Figure 5 illustrates in more detail the cross-section of the key comprising four combination areas • · · · · · I ”and its combination milling, which will be returned later. Thus, the key profile depends on how many combination areas the key shaft comprises. The wrench of the key comprises at least one region of co-ordination in the direction of the shaft.

• ·: The combination arm region of the key arm of the invention comprises a key groove 5 in the direction of the key arm having a central groove 19 (Fig. 7) deeper than the peripheral parts of the groove 20. The groove forms the outermost combination surfaces of the combi | ], so that the middle portion of the groove 19 forms a contact surface for the baffle plate for the baffle plate. Combining mills are named, for example, from 1 to 6. O-surface refers to a non-milling surface. 1-milling is usually the lowest milling and 6-milling is the deepest milling. Thus, the magnitude of the number indicates the magnitude of milling. There are other ways of naming milling and thus combining surfaces. Figure 5 is an example key of 1 further comprising rectangular rubber grooves 6 in the middle of the long sides of the key handle.

Figure 2 illustrates an example of a key 1 according to the invention and a disc damper cylinder. The disc damper cylinder lock comprises a cylinder body 23 (Fig. 3) and an inner cylinder 7 within it. The inner cylinder has a disc bundle comprising 10 baffle plates 8 which can be pivoted by a key 1. At least one barrier plate is the 0 barrier plate 14 (Figure 6). "O-bar" means a bar that is intended to engage against a non-milled key surface. Thus, the 0-baffle plate always follows the turning of the key. Similarly, 1-baffle plate, 2-baffle plate, etc. are referred to, depending on what, respectively, the designated combination surface is intended to be. The baffle plates comprise a key passage 9, 15 (Figs. 4-6) and an edge groove 21 at the outer edge of each plate. The cylinder lock further comprises a bar for locking the lock 22. The bar can be arranged on the edge of the bar by turning the bar with a key 1 to open the lock. The disk bundle usually also has baffles between the baffles. The spacers are not described in more detail in this context as their description is not necessary for the description of the invention. Thus, the cylinder lock may also include other parts not shown in this text.

• · ·:. ·. Figures 3-6 illustrate examples of a key and a disc harness according to the invention. . ·. on the operation of the blade lock. The key shaft 2 is depicted in the direction of the shaft of the shaft. so that the profile (cross-sectional area) of the shaft is clearly visible. The inner cylinder 7 and the drawbars 8 · 14 are depicted from the direction of the inner cylinder shaft end. This is also a disadvantage ···. the shapes of the key channels 9, 15 of the discs are clearly visible. Figure 3 also illustrates, by way of example, the cylinder body 23 of the lock. *. the profile of the locking key 1 and the shape of the baffle plate 8.

Figure 3 shows the key of the invention and the key of the baffle plate in the basic position. Base position refers to the position of the key where the key can be pushed into the plate · · .... inside the lock cylinder. The key arm 2 is depicted as a cross-section of a · ·· • · 5 position showing a groove 5. The groove 5 corresponds to the outermost combination surface. The outermost combination surface is designated as the 1-combination surface for use in this text. Accordingly, the corresponding designation of the cylinder baffle plate 8 is a 1 baffle plate. The baffle plate 8 comprises a key passage 9 and an edge groove 21 at the outer edge of the plate. The key channel edge 10 engages at least one counter surface 11 for the groove 5. The number of matching faces required depends on the key profile used. The counter surface is shaped to follow the shape of the groove 5. The cylinder lock further comprises a draw bar 22.

Fig. 4 illustrates an example of Fig. 3 with the key turned against the baffle plate. In this example, the key profile has four grooves 5. When the key is turned to unlock 10, the grooves 5 at opposite surface portions of the key profile form a contact surface with the corresponding counter surfaces 11 of the key channel edge 10 of the baffle plate. turned to the drawbar 22. When all the baffle plates of the inner cylinder 7 levers are turned to the corresponding position, the baffle bar is able to insert into the edge grooves of the baffle plates, which allows the lock to be released.

The groove 5 of the combination area is preferably shaped as a concave, with the contact surface curved as shown in Figure 7. Further, when the counter surface 11 of the key channel 10 of the baffle plate is correspondingly convex, a point extending beyond the point contact is obtained. . ·. the contact area between the 1-combination surface of the key and the 1-hinge plate. Career 5 Mid- ···. ·. Thus, the junction 19 is deeper than the groove edge portions 20. The edge portions protect the central groove • • against wear. The notation A represents the difference in depth between the edge portion 20 and the middle portion 19. Other groove shapes can also be used (for example, v-groove), but are not as advantageous as concave groove shapes.

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Fig. 5 illustrates another example of a key and a baffle plate 25 according to the invention with the key turned against the counter surfaces of the baffle plates. The point of intersection of Fig. 5 is at the · · · non-outermost combination surface of the key. Other combination surfaces are not shown in the other figures of this disclosure. In this example, the cross-section of the key: arm 2 is illustrated at the 2-combination surface. The 2-combining surface 12 is formed in the key combination area which abuts against the counter surface 11 of the baffle plate when the key is turned clockwise. The combination area that is: facing the second counter surface 11 of the baffle plate when turning the key counterclockwise has 4- ♦ · 6 combination surface 13. Thus, this example illustrates a key and a cylinder where the lock can be opened by turning the key clockwise or counterclockwise. The combination surface system has a certain maximum number of different combinations by which the lock can be unlocked by turning the key in either direction. For this reason, the milling surfaces of the forward rotation direction and 5 counter-rotation directions must have a particular milling combination, such as 1-5, 2-4, 3-3 shown in the figure, etc., according to the naming convention used herein. If the cylinder lock in the example of Figures 3 and 4 could be opened by turning the key in either direction, the key combination area 10 will be facing the hinge plate in a counterclockwise direction, the counter key being counterclockwise.

The disc hinge cylinder lock, which opens in both directions of rotation, also generally has reset rods that can be used to reset the discs. Figure 5 does not show the return rods as they are not essential to the description of the invention 15.

In the example of Figure 5, the shape of the 2-handler key channel is the same as the 1-hand key key channel shape. Since the combination surfaces 12, 13 of the combination surface are substantially straight in contact, the combination surface 12 and the opposite. . ·. the contact surface between the contact surface 11 of the baffle plate is dot-like.

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i, * ·· 20 The key combination zone groove 5, which forms the outermost combination surface. * · *, is the outer combination surface of the region that can be placed against the counter surface of the normal discs of the cylinder blade. The outer combination surface is more susceptible to environmental abrasion than other deeper combination surfaces. In order to achieve even wear on the various combination surfaces, it is preferred that the contact surface between the outer combination surface and the baffle plate is greater than other combination surfaces. When the groove 5 is concave and the convex surface 11 of the baffle plate is convex, a contact area wider than the point contact is obtained.

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It is thus desirable that, with the exception of the 0-baffle plate 14 (Fig. 6), the edge 10 of the key-channel 9 of each of the baffle *: · *: 30 pulls 8 comprises at least one convex counter surface 11 for the transmission connection between the baffle plate 8 and the key 1.

The disc bundle inner cylinder disc bundle usually comprises at least one O-discs. As mentioned above, an "O-baffle plate" is intended to mean a baffle plate 5 which is intended to be in contact with the outer key surface and thus always follows the turning of the key. The key has a control surface, so-called. O-guide surface that transmits the key rotation to the O-board contact surface. Thus, the O-guide surface of the key is always arranged to guide the O-baffle plate. This means that the O-guide surface is sensitive to wear caused by inserting the key into the lock cylinder and pulling it out of the 10 lock cylinders. Thus, it is not highly desirable for the O-bar to rub against the key-parallel groove 5.

Figure 6 illustrates an example of a key according to the invention and an O-baffle plate 14. The edge 16 of the zero-key key channel 15 is preferably shaped such that it does not form a contact surface against the groove 5 of the key combination area. Thus, the wear of the groove 15 is avoided, so that another surface portion 17 is provided in this type of O-baffle plate to obtain control of the guide surface of the key. The key has an O-guide surface 18 which transmits the key rotation to the O-contact surface 17 of the O-baffle plate.

It is, of course, also possible that the keyhole edge of the O-barrier plate 14 also comprises at least one convex counter surface 11 for the keyway 5 to provide: a connection between the O-barrier plate and the key 1. In this case, the shape of the key channel edge, * · * of the O-baffle plate corresponds to the shape of Fig. 6 with the convex counter surface 11 of the key-channel edge shown in Figs. 3, 4 and 7. :. · .Ί exact profile of the key blank profile. This embodiment is quite usable when the inner cylinder disk bundle has one O-baffle plate on the inner cylinder bottom. In this case, the O-baffle plate can contact the bottom of the groove 5 only in the area of the free end of the key, and the groove bottom cannot rub against the O-baffle plate elsewhere in the key shaft.

• ·: The groove 5 is at least in the key combination area, but it can also be the whole length of the key · · ·. The key-length groove length is advantageous for fabrication *: ··: 30.

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If the disc damper cylinder lock comprises a drill guard having a key passage, the edge of the key passage of the drill guard preferably is shaped such that it does not form a contact surface against the key groove 5.

If the disc-damper cylinder lock comprises a rotation limiter having a key channel, the edge of the key channel of the rotation limiter 5 is preferably shaped such that it does not form a contact surface against the key groove 5.

The key and disk lock cylinder lock according to the invention can be formed for many different embodiments. The basic shape of the profile of the key arm 2 may be, for example, a rectangle having long sides and short sides, the short sides being rounded to form convex surfaces. The basic profile of the key arm 2 can also be a rectangle with long sides and short sides with two opposite corners rounded.

In the light of the above examples, it is clear that many embodiments of the invention may be achieved over time. It is also to be understood that the invention 15 is not limited to the examples mentioned herein, but may be embodied in a variety of embodiments within the scope of the inventive idea.

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Claims (10)

1. A disk cylinder key (1) whose shaft (2) comprises at least one combination region (4) parallel to the shaft of the key, in which a portion may be created a combination surface series, characterized in that the combination region comprises a spar (5) parallel to the shaft, which the middle portion (19) of the spar is located deeper on the edge portions (20) of the spar, which form the outermost combination surfaces of the combination surface series which will be created such that the middle portion of the spar (19) forms a contact surface for the disc cylinder locking disc and the edge portions protect the middle portion from wear. 2. A key according to claim 1, characterized in that the latch (5) is concave to the mold, the contact surface being beak-shaped. Key according to claim 1 or 2, characterized in that the other combination surfaces (12, 13) of the combination surface series formed in the combination region (4) have a substantially straight contact surface. Key according to any of claims 1, 2 or 3, characterized in that the basic shape of the profile of the key shaft (2) is a rectangle with long and short sides, which short sides are rounded to form convex surfaces. 5. A key according to any one of claims 1, 2 or 3, characterized in that the basic shape of the profile of the key shaft (2) is a rectangle with long and short sides, the rectangle having two opposite rounded horns. 6. A key according to claim 4 or 5, characterized in that in the middle of the long sides is a rectangle lock (6). A disk cylinder reading with a cylinder housing (23) and an inner cylinder (7) therein, which inner cylinder has a disk bundle, which disk bundle comprises a key (1) rotatable locking discs (8), of which locking discs at least one is a locking disc (14), which locking discs comprise a key channel (9,15) and an edge lock (21) at the outer edge of each disc, and which cylinder reading further comprises a locking bar (22) for reading the reading, and which locking bar can be arranged in the edge locking in the locking discs by rotating the locking discs with the key (1) for reading the reading, characterized in that the edge (10) of the key channel (9) of each locking disc (8) with the exception of the 0-locking disc (14) has at least one convex abutment surface (11) for the corresponding combination surface of the combination summer row of the key to establish a connection between the locking disc (8) and a key (1) according to any of claims 1 - 6. Disc cylinder laser according to claim 7, characterized in that the edge (16) of the key channel of the O-lock disc (14) is such that it does not form a contact surface against a combination surface of the combination area of the key. A disk cylinder laser according to claim 7 or 8, characterized in that the disk cylinder laser comprises a drill cover with a key channel, the edge of the key channel being such that it does not form a contact surface against a combination surface in the combination area of the key. A disk cylinder laser according to claim 7, 8 or 9, characterized in that the disk cylinder laser comprises a pivot limiter with a key channel, the edge of the key channel being such that it does not form a contact surface against a combination surface in the combination area of the key.