HRP20000651A2 - Flat key and cylinder lock - Google Patents

Description

The subject invention relates to a single flat key for a cylinder-lock, the body of which on both flat sides has a longitudinal profile with longitudinal grooves and/or longitudinal protrusions (ribs), whereby the longitudinal profile of the top part (top profile) differs from the longitudinal profile of the of the body (body profile), wherein the body on the lower part of the key has at least one notch of the key for operating the closing pin, and the profile of the tip is narrower than the profile of the body, so that the contour of the tip profile is inside the contour of the body profile, as well as on the cylinder- a lock with a body and cylinder core that can be turned.

A well-known method for additional locking for cylinder-locks is the so-called "picking". There are various tools for these methods, usually a thin plate is inserted into the key channel and the locking pins are brought into the unlocking position by vibration. This violent punching can be done more easily with "open" key channels, because such key channels have many places for the introduction of the "Picking" tool and cause them to move vertically. Such open key channels are either conditioned by the system or exist in large closing devices due to profile variations, where many key channel protrusions fall off.

In practice, it has been shown that forcible penetration is much more difficult or almost impossible if the channel of the key is made in a narrow design (thin) and if it overlaps, so that it is impossible to introduce or use a piercing tool. On the other hand, depending on the system or due to profile variations, the key channels and associated key profiles cannot always be produced in the desired narrow design, i.e. due to variations, the overlap of the protrusions (ribs) of the core partially disappears.

The task of this invention is therefore to produce such a profile of the key and the associated lock to make it difficult to forcefully break through. Also, the possibility of obtaining variations should be increased, so that large closure devices can be made.

According to the present invention, a flat key with the above-mentioned features is characterized by the fact that at least one notch of the key is placed on the lower part of the key in the top part.

The lock according to the present invention is characterized by the fact that at least one reading slide is placed between two closing pins transversely to the middle longitudinal plane of the key channel, and that the reading slide has a profile of the key reading slide in its top part, which is thinner than the profile part of the handle of the key channel.

Further features can be seen in the Patent Claims, following descriptions and drawings.

Furthermore, the invention will be explained in more detail by means of practical examples.

Figure 1 is a side view of a wrench according to the present invention.

Figure 2 shows a broken cylinder core

Figures 3 and 4 show two alternatives of one detail

Figure 5 shows one variant of the embodiment with a cross-section of the key channel according to the present invention.

Figure 6 is a section through another embodiment of the key channel according to the invention,

Figure 7 shows the associated key in section.

Figure 8 is a section through a lock and key of another type.

Figure 9 shows a cross-section of a further type of key.

According to Fig. 1 the key 1 has two parts on its body 2, namely the body part 3 and the top part 4. The lower part of the key is made by means of key notches 5 which, as is known, can be of different depths and by means of their control surfaces (working surfaces) at the control points 13 they control the corresponding closing pin.

The body part 3 carries that longitudinal profile of the key, which is necessary for the systematization and variations of the closure. This part can have profile elements with relatively large profile protrusions (ribs) 14, which are assigned correspondingly large profile slots in the associated key channel. Profile key slots are marked with 15.

In the top part 4, the profile is narrower and provided with an overlapping profile if possible. The top part extends from the tip of the key 6 at least to the area behind the first notch of the key 5'. The line 16 is drawn as the dividing line between both parts. The recess 23 of the back part of the key in the part of the top shown by the dashed line can be performed as desired, if the screen for reading (recognition) is used according to Fig. 4. This instruction is a further safety feature.

The layout and interrelationship of the different parts of the profile will be clarified later.

When manufacturing the key, it is recommended that the key preparation (raw forging) be profiled along the entire length of the body (key profile grooves 15), for example with a profile milling cutter. Then, in the top part 4, by removing the material of the key and making additional grooves or expanding the existing grooves, the profile is narrowed, as shown in Fig. 1 and marked with 24. "Tapering" can be done up to the strength limit of the material, since it is only one small part of the key and since there is no danger of breakage. A tip profile that is aligned with the body profile is recommended.

The profile of the key is read with one analogue profile of the channel of the lock. The profile of the key channel must in principle allow the entire body of the key to be inserted, so it should match the profile of the body part 3 and allow the insertion of the peak profile.

According to Fig. 2, for the additional reading of the thinner (narrower) profile of the peak part 4 in the core of the cylinder 7, a gap 8 is provided, into which a screen for reading 9 is inserted, as shown in two other exemplary embodiments in Fig. 3 and 4. The profile of the curtain 10 defines the contour of the profile of the top and determines the analogous profiling of the part of the top 4 of the flat key.

The channel of the key 11 is cut by a gap 8 between the two openings of the pins 21 and 21'. Part of the section 3 of the key body after the insertion of the element 22 of the cylinder core 20 reaches the reading slide 9 in the gap 8. The tip part 4 protrudes through the reading slide and with the notch of the key 5' drives the closing pin located behind it, which fits into the opening pin 21'.

Variant of the screen for reading from Fig. 3 is used for upward-opening key channels with a pass-through key back. Variant from Fig. 4 with a closed slide for reading requires a recess 23 at the top of the key, as it is schematically shown in Fig. 1.

Figures 5 to 7 show implementation examples for notches through the channel of the key, i.e. an inserted (retracted) key in a section along line V-V from Fig. 2, so slightly beyond the border 16 between the body part and the top part (Fig. 1).

On Fig. 5 is a key channel marked with dashed lines showing a certain profile contour. This is the contour of the profile of the key body on the body section 3. As can be seen, the key channel thus derived is relatively open, so that it would be possible to forcefully penetrate it.

Using the profile of the scenery 10 or. with the help of profile parts 17 located in the key channel 11, a narrow profile contour is created, which is located within the profile contour of the key channel and the body part. The tip of the key to be driven in is thus given a profile that matches that narrow contour of the tip profile, if the entire key has to be driven in.

In this way, a relatively open profile is obtained for the part of the body, which may be needed to achieve variations. Of the narrow-profile reading shutter 9, the top part of the shutter 10 is profiled as narrower, as it corresponds to the profile of the shutter. The contour of the profile of the tip section is located inside the contour of the profile of the body section. The entire profile overlaps the height of the key, this means that the ribs (protrusions) located on both sides of the key channel reach at least the median longitudinal plane 12 or exceed it. Insertion of a very thin plate for forced penetration is possible up to the reading screen 9, but not through it. In this way, it is impossible to pierce the closing pin located behind it.

Figure 6 shows a section of the channel of the key 11 of another version of the key with a section through part of the body. Those additional parts of the profile 17, which are predicted by the reading screen 9 and which form the profile of the part of the tip of the snack, are shown in dashes.

Figure 7 shows the associated key in section through the top part, which gives the profile in the top part. Those additional slots that the same key has in the body part and which enable the necessary variation of the key are shown in dashed lines.

Figure 8 shows a cross-section through a keyed lock of another variant of the profile and closure. The section plane is located on the reading screen 9. The reading screen here serves to cover one of the two halves, namely the right half of the stepped element for closing the pin 18. One variant can only be performed in the left half shown here, while the right half of the element for the pin closure cannot be reached by either a key or a reading tool. Thus, even with this version of a cylinder-lock, the channel of the key from the slide for reading 9 must be narrow. If the fronts of the pin closures for variations use the other right half of the pin closures, both the right half of all the front pin closures and the left half of the pin closures would have to be read using the break tool against the reading slide 9 However, this is completely impossible. On Fig. 8 is the housing marked with 19, with 20 the cylinder core and with 1 key.

When using stepped core pins in conjunction with double-sided coding of the key body, it is recommended that the front core pins, for example, be coded "right" and the inner core pin "left". For the front core pins, the left coding is then removed by milling (it does not exist), and for the inner core pin, the right coding is removed by milling. Thus, the front left key code and the rear right key code are not effective. The reading slide in front of the inner pin releases only the left half of the profile. The top of the key body has only the left part of the profile. The key body and front key channel can have both left and right profile sections. In the case of a violent penetration, the front pins on the left side and the inner pin on the right side must therefore be engaged at the same time. This cannot be done in practice.

On Fig. 8, the key-lock system shown is described in detail in the Austrian patent application A 1847/97 as well as in the application for use GM 681-97.

The performance of the key profile according to this invention can be applied to all profile systems with longitudinal grooves and longitudinal ribs and is not limited to the profile examples shown.

Figure 9 shows a profile cross section through another recommended key profile. The cross-sectional plane passes through the top profile viewed in the direction of the body profile. With thick outer lines, a variant of the body profile is shown, with thin lines, the systematization of the profile is drawn. The body profile corresponds to the profile that the applicant greatly expanded, whereby the zigzag shape profile is used as the theoretical basic profile. This profile is made up of rhombuses in a zigzag shape that directly continue one on another, or of rhomboids. Starting from this basic profile of zigzag shape, there are profile variations in the body profile in such a way that one profile element can be placed in the marked rows 25 above the overall height of one rhombus. In this case, these are three profile elements a, b and c. The number and arrangement of such profile elements can be chosen arbitrarily. The profile of the body in this design variant does not overlap, this means that the bottoms of the grooves 29 do not reach the middle longitudinal plane 26, nor do they overhang it. Profile elements (a, b and c) are located one above the other in the averages of 27, 28 profiles.

The profile of the tip 30 shown in section is made the same as the profile of the body with rhombuses placed next to each other in a zig-zag arrangement, whereby the tip profile is made analogously to profile elements a, b and c with the omission of variable profile elements. Furthermore, in the shown embodiment, the top profile is made according to the overall height of the key body with a small wall thickness so that it is narrower. In addition, the top profile is made with an overlap, which means that the bottoms of the grooves 29 reach at least the middle longitudinal plane 26 or exceed it.

In this embodiment according to FIG. 9, it is clearly visible that by means of the embodiment according to this invention, the closing devices, made with a body profile, can be expanded in this way, to provide the top profile according to the invention, whereby protection against forced opening is additionally achieved.

Since the flat key is described here, then the raw key preparations also belong here, i.e. those pre-products, which have a key profile according to the invention and which are only later equipped with key notches on its lower part. The technical properties shown in the drawings can be combined with each other and in different ways. For example, the profile according to Fig. 9 can be conical and can have a recess 23 in the top part, which reduces the height of the key in that part.

Claims (12)

1. A flat key for a cylinder-lock, the body of which on both flat sides has a longitudinal profile with longitudinal grooves and/or longitudinal protrusions (ribs), whereby the longitudinal profile of the top of the body (tip profile) differs from the longitudinal profile of the body part (profile body), and wherein the body on the lower part of the key at the tip has at least one key notch for operating the closing pin, and the profile of the tip is narrower than the profile of the body, so that the contour of the profile of the tip lies within the contour of the profile of the body, indicated that on the lower part of the key in the top part (4) places at least one notch of the key (5'). 2. Flat key according to Patent Claim 1, characterized by the fact that on the lower part of the key, in the usual way, in the part of the body (3), further notches of the key (5) are provided (made). 3. A flat key according to Patent claim 1 or 2, characterized by the fact that the profile of the top, starting from the profile of the body along the entire length of the body, by removing the material of the key and creating additional grooves or expanding the existing grooves (24), is made narrower than the profile of the handle . 4. A flat key according to one of Claims 1 to 3, characterized in that the top profile is designed as a folding profile at least in the lower part. 5. A flat key according to one of Claims 1 to 4, characterized in that the profile of the tip is made as a profile corresponding to the profile of the body. 6. A flat key according to one of Patent Claims 1 to 3, characterized by the fact that in the case of a flat key, the lower part of which is made with two working curves that can be read by staggered locking pins, the top profile includes only one of the two working curves and the area of the lower part of the key with the second working curve is removed (fig. 8). 7. A flat key according to one of Claims 1 to 5, characterized in that the body profile, as is known, has a zigzag profile as a basic profile, the cross-section of which is made of zigzag-shaped rhombuses that directly connect to each other , and to which the variation profile elements (a, b, c) continue laterally in the gaps (27, 28) along the overall height of each rhombus, which are also placed in rows (25) transverse to the gaps, in order to create profile variations and how by removing (dropping) the variational profile elements (a, b, c), the peak profile (30) would be derived. 8. Flat key according to Patent Claim 7, characterized in that the top profile (30) has a thinner wall than the body profile in terms of the total height of the key body and is designed as a folding profile. 9. A flat key according to one of Claims 1 to 8, characterized in that the rear part of the key is recessed in the top part (recess 23). 10. A cylinder-lock with a housing and a cylinder core that can be rotated therein and at least two locking elements with pins operated by a key, characterized in that at least one reading screen (9) is placed between the two locking elements with pins (18) transverse to the middle longitudinal plane (12) of the key channel and that the closing slide (9) has the profile of the slide (10) for reading the key (1) in its tip part (4), which is narrower than the profile of the body part of the key channel (11). 11. Cylinder-lock according to Patent Claim 8, characterized in that the reading screen (9) is placed in front of the internal element with pins (pin opening 21'). 12. Cylinder-lock according to Patent Claim 8 or 9, characterized in that the reading screen (9) in the area of the back of the key is closed (Figure 4).