CZ31995U1 - A key and a locking cylindrical insert - Google Patents

Description

Technical field

The technical solution relates in particular to a key provided with a flat shaft with a tip, two lateral sides, a spine and a spine opposite the spine with cut-outs for engaging and adjusting the tumblers of the locking cylinder. Furthermore, the invention relates to a lock cylinder comprising a rotary drum with a keyhole insertion hole, tumblers for locking the rotation of the drum, a fixed housing with a drum-receiving hole and semi-closed tumbler-receiving holes.

BACKGROUND OF THE INVENTION

Presently, cylindrical locking cylinders are known which are installed in door locks or other devices to lock them against all who do not possess the corresponding original key to unlock the cylinder. To increase security, the trend is to use only original keys, or duplicates produced or approved by the manufacturer of the original key.

The key for a standard cylindrical insert has a flat head for gripping the fingers of a hand, from whose periphery a substantially flat tip-tipped shaft protrudes, which may have a different cross-sectional shape, e.g. The shaft further has a spine and cuts are formed on the shaft opposite to the spine for engaging and adjusting the tumbler tumblers.

The cylindrical inserts consist of a stationary rigid sleeve with a cylindrical bore into which a toothed drum is rotatably mounted. Unequal long tumblers, which extend beyond the dividing plane of rotation between the housing and the drum, extend into the area of the drum and block the rotation of the drum. The notches on the lower edge of the key shank, when the key is correctly inserted into the drum, push the tumbler at the dividing plane interface and can be rotated with the drum. By turning the drum, the tooth of the cylindrical locking cylinder is manipulated.

In order for the key to be inserted into the insert to a precise depth so that the slots on the shaft properly handle the tumblers, the key is provided with a stop surface and the cylinder insert with a stop. The most widespread designs include cylindrical locking inserts having a stop at the front of the drum. The stop is used to stop the key, which is inserted in the direction of its longitudinal axis into the cylinder of the lock cylinder up to its stop surface. In this case, the stop surface is formed at the interface between the shaft and the flat head of the key. The solution described in utility model CZ 23209 transfers the stop elements inside the lock cylinder. Inside the housing is located in a special recess a stop body, which is mounted movably with play to allow the spine of the inserted key to be passed.

Furthermore, a technical solution for a lock cylinder and a key described in utility model CZ 26951 is known. The stop body is here also provided as a locking member. The blocking member serving as a stop body is provided with at least one pin extending in the rest position the dividing plane of rotation. Without lifting the locking member, the separation plane will not be unlocked to rotate the drum and unlock the insert.

The utility model CZ 28435 describes a technical solution with increased security where the locking member partially extends into the key insertion space. The original key is provided with at least one groove on the side of the shaft between the spine and tumbler slots. If another key is inserted, it will collide with the blocking member and the key under the blocking member will not pass, therefore it is not inserted into the insert.

- 1 CZ 31995 Ul

The utility model CZ 29412 describes a technical solution which achieves a higher safety by using an additional notch located on the key back and a lifting means on the side of the key by which the locking member located in the drum is lifted so that it can engage said additional notch and unlock so the drum of the liner.

The disadvantages of the previous solutions are complexity, sensitivity to inaccurate and coarse key handling and contamination. It would therefore be advantageous to provide a key solution allowing the operation of the corresponding locking elements as deeply as possible in the lock, ideally by direct interaction with the tooth of the cylinder lock, which reduces the number of moving components in the cylinder and its sensitivity to rough handling. The key should be resistant to rough handling, especially when inserted into the insert. At the same time, it is desirable that the new key be compatible with at least some of the existing cylindrical locking cylinders according to the technical solutions described above, in addition to being compatible with the new safer liner.

Many of the aforementioned objects are achieved by the solution described in utility model CZ 30812, in which it is proposed that the key shaft has a shaped notch or recess in its front part on the spine for receiving the locking and / or auxiliary control element of the lock cylinder. The lock cylinder of the present invention has, in its rearward end key region, a tumbler-side seat for rotatably receiving a locking and / or auxiliary control element that is configured as a rotary segment having a rest vertical position in the non-retracted state the correct key and the horizontal working position to which the segment passes by inserting the correct key. However, even this solution has its drawbacks and it is undoubtedly possible to improve it further.

The essence of the technical solution

The object of the present invention is therefore a key provided with a flat stem with a tip, two lateral sides, a spine and a spine opposite to the spine with cut-outs for engaging and aligning the tumblers of the lock cylinder, the shaft having a lateral recess on at least one of its two sides. the tip of the shaft and the end stop surface for the stop pin in the cylinder of the lock cylinder.

Preferably, the lateral recess in the longitudinal direction of the shaft has a length of from 1/10 to 2/3 of the total length of the shaft.

Preferably, the lateral recess in the transverse direction of the shaft from the back has a height of 1/12 to 2/3 of the total height of the shaft.

In a preferred embodiment, the shank is profiled.

In one preferred embodiment, the stem back is smooth.

In another preferred embodiment, the shaft has a recess in its front part on the spine.

In one preferred variant, the shaft has at least one shaped notch on the spine spaced apart from the recess in the direction away from the shaft tip.

In a further preferred variant, the shaft has a plurality of shaped notches on the spine, each further shaped notch being at a distance from the previous shaped notch behind which it is located in the direction away from the tip of the shaft.

In yet another preferred variant, the shaft has exactly one shaped notch on the spine.

-2GB 31995 U1

In the variants described above, the spacing corresponds at least to the distance between two successive cut-outs.

In preferred alternatives of the above-described variants, the recess on the side facing away from the tip has a leading surface extending from the recess towards the back at an obtuse angle.

Advantageously, the side recess is provided with a front haunch starting in the region of the shaft tip and pointing to the dorsal half-plane of the shaft.

Preferably, the side recess is provided at its end or in a region below one of the shaped notches with a lowered bottom.

Preferably, the distance between the lowering bottom and the side recess bottom is equal to or greater than the depth of the notch from the back plane.

Preferably, the shaft has a front chamfer at its tip.

The key is preferably provided with a lower stop at the end of the shank at the cut edge.

The invention also relates to a lock cylinder comprising a rotary drum with a keyhole insertion hole, tumblers for blocking the rotation of the drum, a fixed housing with a tumbler receiving hole and semi-closed tumbler receiving holes, at least one stop pin with a locking protrusion that is directed and extends from the side into the space of the opening for inserting the key shank into the drum.

Preferably, the keyhole insertion hole is profiled.

Advantageously, at least one recess formed eccentrically with respect to the longitudinal axis of the drum receiving opening is provided in the inner wall of the opening of the drum housing.

Advantageously, the facing surface of the locking projection is smooth into the keyhole insertion hole.

Preferably, the stop pin is vertically movable in the drum.

Preferably, the facing surface of the locking projection is profiled into the keyhole insertion hole.

Preferably, the stop pin is then mounted in the drum vertically immovably.

Clarification of drawings

The present invention will be explained in more detail by reference to the drawings. In doing so:

Giant. 1a shows a detailed axonometric view of a keyhole tip with a side recess;

Giant. 1b shows the embodiment of FIG. 1 and in front view;

Giant. 2a-c show axonometric views from different angles of the stop pin with a smooth face of the locking projection;

-3 CZ 31995 Ul

Giant. 3a-c show axonometric views from different angles of a stop pin with a locking projection face provided with a complementary profile;

Giant. 4 shows a detailed axonometric view of the tip of the key shaft with a side recess and an upper recess on the back of the shaft;

Giant. 5 shows a detailed top view of the tip of the key shaft with a side recess and an upper recess on the back of the shaft;

Giant. 6 is an axonometric view of the key variant assembly of FIGS. 4 and 5 in engagement with the locking pin in the variant with the smooth face of the locking projection of FIG. 2 supported against the stop surface of the side recess;

Giant. 7 is a detailed axonometric view of the key variant assembly of FIGS. 4 and 5 in engagement with a locking pin in a variant with a locking projection face provided with the complementary profile of FIG. 3, with the locking projection supported on the stop surface of the side recess;

Giant. Fig. 8 shows a front view of the key variant assembly of Figs. 4 and 5 in engagement with a locking pin in a variant with a locking projection face provided with the complementary profile of Fig. 3;

Giant. 9a, b show a detailed axonometric view of the keyhole tip with a lateral recess (variant a: with a smaller vertical depth, variant b: with a greater vertical depth of the side recess from the back), the upper recess on the back of the shaft and the front recess of the side recess bottom;

Giant. 10 is a detailed axonometric view of a key shaft tip with a side recess, a top recess and a notch on the back of the key shaft;

Giant. 11 shows a detailed top view of the tip of the key shank of FIG. 10 with a side recess, an upper recess and a notch on the back of the key shank;

Giant. 12a, b show a detailed axonometric view of the keyhole tip with a lateral recess (variant a: with a smaller vertical depth, variant b: with a greater vertical depth of the side recess from the back), the upper recess and notch on the shaft back and the front recess of the side recess bottom;

Giant. 13 shows a detailed side view of the tip of the key shank of FIG. 12b with a side recess, an upper recess and a notch on the back of the shaft, and a front run of the bottom of the side recess;

Giant. 14 is an overall axonometric view of a key including an additional lower stop at the transition portion between the head and the flat shaft, wherein the key shaft is provided with a side recess, an upper recess and a notch on the back of the shaft;

Giant. Fig. 15a shows a detailed axonometric view of the tip of the key shank of Fig. 14 with a side recess, an upper recess and a notch on the back of the shank, a front elevation of the bottom of the side recess and a lowering of the bottom of the side recess at its end;

Giant. 15b illustrates a perpendicular cross-section of the key shank at the lowering point of the embodiment shown in FIG.

Giant. 16 shows a side view of a key shaft tip with a side recess, an upper recess and a notch on the back of the shaft and a front lead and a lowering at the end of the bottom recess bottom;

-4EN 31995 Ul

Giant. 17 is an axonometric view of a key with a side recess, an upper recess and a notch on the back of the shaft, inserted into the drum and supported by the stop surface of the side recess against the locking projection of the stop pin inserted in the drum; and

Giant. 18 is an axonometric view of the assembly of FIG. 17 inserted in the fixed housing shown in half section.

Examples of technical solutions

The examples below serve only to illustrate specific practical embodiments and are not intended to limit the scope of protection desired. The description of these examples is made with reference to the figures of the attached drawings, in which the reference numerals are used continuously to denote the same or corresponding parts or elements in different views.

Figure 1a shows a detailed axonometric view of the tip of the keyhole 2 with a lateral recess

Figure 1b shows the embodiment of Figure 1a in front view. Thus, it can be seen that in the basic embodiment of the present invention, a key may be provided with a flat stem 2 with a tip, two lateral sides, a spine 3 and an opposing edge 3 with slots 4 for engaging and aligning tumblers of the lock cylinder. The shank 2 is provided on at least one of its two lateral sides at the spine 3 with a lateral recess 5 extending from the tip of the shank 2 and ending with a stop surface 6 for the stop pin in the drum 17 (see figure 17). The lateral recess 5 may have a length of 1/10 to 2/3 of the total length of the shaft 2 in the longitudinal direction of the shaft 2. The lateral recess 5 may have a height of 1/12 to 2/3 of the total shaft height in the transverse direction of the shaft 2. 2. It can also be seen that the shank 2 can be profiled. In the embodiment shown in Figures 1a and 1b, the back 3 of the shaft 2 is smooth.

Figures 2a to 2c show axonometric views from different angles of the stop pin with the smooth face 18 of the locking projection 7. It can be seen that the stop pin is formed by a body 15 with the locking projection 7 on one side thereof, the locking projection 7 pointing and extending from the side As shown above, in the embodiment shown, the keyhole insertion hole 2, that is, the face of the face 18, of the locking projection 7, is smooth.

Figures 3a to 3c show axonometric views from different angles of the stop pin with the face 18 of the locking projection 7 provided with a profile complementary to that provided on the key shank 2 in the region of the side recess 5. In other words the face of the key shank 2, i.e. the face surface 18, of the locking projection 7 is profiled.

Figures 2a to 2c and 3a to 3c further illustrate a stop pin guide groove 16 for guiding the stop pin in the cylinder 17 of the lock cylinder, as will be apparent to one of ordinary skill in the art.

Figure 4 shows a detailed axonometric view of an embodiment of the keyhole 2 of the key with a side recess 5 and an upper recess 9 on the back 3 of the shaft 2. Figure 5 shows a detailed top view of this embodiment of the keyhole 2 of the key with the side recess 5 and the upper recess 9 on the back 3. In Figures 4 and 5, it can be seen that the recess 9 may have, on the side facing away from the tip, a leading surface 21 extending from the recess 9 towards the back 3 at an obtuse angle. It is also seen in these figures that the side recess 5 has a bottom 13.

-5 CZ 31995 U1

FIG. 6 further shows an axonometric view of the key variant assembly of FIGS. 4 and 5 in engagement with the locking pin in the variant with a smooth face 18 of the locking projection 7 of FIG. 2 supported against the stop surface 6 of the side recess 5.

Figure 7 then shows a detailed axonometric view of the key variant assembly of Figures 4 and 5 in engagement with the locking pin in a variant with the face 18 of the locking projection 7 provided with the complementary profile of Figure 3, with the locking projection 7 resting against the stop surface 6 of the side recess 5. 8 shows a front view of the key variant assembly of FIGS. 4 and 5 in engagement with the locking pin in a variant with the face 18 of the locking projection 7 provided with the complementary profile of FIG. 3.

Figures 9a and 9b show alternative embodiments of the keyhole 2 with a side recess 5 in a detailed axonometric view, with Figure 9a showing a variant with a smaller vertical depth and Figure 9b showing a variant with a greater vertical depth of the side recess 5 from the spine 3 Also shown is the upper recess 9 on the back 3 of the shaft 2 and the front hinge 14 of the bottom 13 of the side recess 5. Thus, it can be seen that the side recess 5 may be provided with a front recess 14 starting at the tip of the shaft 2 and pointing to the dorsal half of the shaft 2.

Figure 10 shows a detailed axonometric view of an embodiment with the tip of the key shank 2 with a side recess 5, an upper recess 9 and a notch 8 on the back 3 of the key shank 2. This embodiment is illustrated in detail from above in Figure 11. Thus, it can be seen that the shaft 2 may have at least one shaped notch 8 on the spine 3 spaced apart from the recess 9 in the direction away from the tip of the shank 2. Alternatively, the shaft 2 may have several shaped notches 8 on the spine. each spacing from the previous notch 8, behind which it is located in the direction away from the tip of the shank 2. In one variant, the shank 2 has just one notch 8 on the spine 3. The aforementioned distance corresponds at least to the distance between two successive cutouts 4.

Figures 12a and 12b show a detailed axonometric view of the tip of the keyhole 2 with a side recess 5, with Figure 12a showing a variant with a smaller vertical depth and Figure 12b showing a variant with a greater vertical depth of the side recess 5 from the spine 3. the upper recess 9 and the notch 8 on the back 3 of the shaft 2 and the front run 14 of the bottom 13 of the side recess 5.

Figure 13 shows a detailed side view of the tip of the key shank 3 of Figure 12b with a side recess 5, an upper recess 9 and a notch 8 on the back 3 of the shaft 2 and a front run 14 of the side recess bottom 13. the front chamfer 12.

Figure 14 shows an overall axonometric view of the key comprising an additional lower stop 1 on the transition portion between the head and the flat shaft 2, wherein the key shaft 2 is provided with a side recess 5, an upper recess 9 and a notch 8 on the spine 3. Figure 15a then shows a detailed axonometric view of the tip of the key shaft 2 of Figure 14 with a side recess 5, an upper recess 9 and a notch 8 on the shaft 3 of the shaft 2, with a front haunch 14 of the bottom. 13 of the side recess 5 and lowering 10 of the bottom 13 of the side recess 5 at its end. Figure 15b further shows a perpendicular section through this key shaft 2 at the bottom 11 of the lowering 10 in the embodiment shown in Figure 15a. Thus, it can be seen from Figures 14, 15a and 15b that alternative embodiments of the object of the invention may be such that the side recess 5 is provided at its end or in the region below one of the shaped notches 8 with a lowering 10 with bottom 11. 10 and the bottom 13 of the side recess 5 is equal to or greater than the depth of the notch 8 from the plane of the back 3.

-6GB 31995 U1

Figure 16 shows a side view of a possible alternative of the keyhole 2 of the key with the side recess 5, the upper recess 9 and the notch 8 on the back 3 of the shaft 2 and the front lead 14 and lowering 10 at the end 13 of the side recess 5.

Figure 17 shows an axonometric view of a key with a side recess 5, an upper recess 9 and a notch 8 on the spine 3 of the shaft 2, inserted into the drum 17 and supported by the stop surface 6 of the side recess 5 against the locking projection 7 of the stop pin inserted in the drum 17. 17 is an axonometric view of the assembly of FIG. 17 inserted in the fixed housing 19 shown in half section. Thus, it can be seen in Figures 17 and 18 that a locking cylinder can be formed comprising a rotary drum 17 with a keyhole 2, a tumbler to block the rotation of the drum 17, a fixed housing 19 with a drum-receiving hole 17 and semi-closed tumbler receiving holes. 5. At least one stop pin with a locking protrusion 7 may be provided inside the drum 17 laterally at the key shaft insertion hole 7, which extends and extends from the side into the space of the key shaft insertion hole into the drum 17. The key shaft insertion hole 2 may be profiled. It can also be seen in Figures 17 and 18 that at least one recess 20 formed eccentrically with respect to the longitudinal axis of the drum receiving opening 17 is provided in the inner wall of the opening of the drum housing 17 at least a portion of the periphery of the opening. of the opening for inserting the key shank 2, the facing surface of the locking projection 7 is smooth. Then, the stop pin in the drum 17 can be vertically movable. In another alternative, the facing surface of the locking lug 7 can be profiled into the opening for inserting the key shaft 2.

Then, the stop pin can be mounted vertically immovably in the drum 17.

Industrial applicability

The key and lock cylinder according to the present invention find application in, for example, safety equipment, construction, property protection and human health.

PROTECTION REQUIREMENTS

Claims (23)

A key having a flat stem (2) with a tip, two lateral sides, a spine (3) and a spine (3) opposite a cut-out edge (4) for engaging and aligning tumblers of a lock cylinder, characterized in that the stem (2) is provided on at least one of its two lateral sides at the spine (3) with a lateral recess (5) extending from the tip of the shaft (2) and terminating a stop surface (6) for the stop pin in the cylinder lock cylinder (17). Key according to claim 1, characterized in that the side recess (5) has a length of 1/10 to 2/3 of the total length of the shaft (2) in the longitudinal direction of the shaft (2). Key according to any one of claims 1 to 2, characterized in that the lateral recess (5) has a height from 1/12 to 2/3 of the total height of the shaft (2) in the transverse direction of the shaft (2) from the back (3). . Key according to any one of claims 1 to 3, characterized in that the shank (2) is profiled. Key according to any one of claims 1 to 4, characterized in that the back (3) of the shank (2) is smooth. Key according to any one of claims 1 to 4, characterized in that the shaft (2) has a recess (9) in its front part on the back (3). -7 GB 31995 U1 Key according to claim 6, characterized in that the shaft (2) has at least one shaped notch (8) on the back (3) spaced apart from the recess (9) in the direction away from the tip of the shaft (2). Key according to claim 6, characterized in that the shaft (2) has a plurality of shaped notches (8) on the spine (3), each further shaped notch (8) being at a distance from the previous shaped notch (8), after which is located, in the direction away from the tip of the shaft (2). Key according to claim 6, characterized in that the shaft (2) has exactly one shaped notch (8) on the back (3). Key according to any one of claims 7 to 9, characterized in that the distance corresponds at least to the distance between two successive cut-outs (4). Key according to any one of claims 6 to 10, characterized in that the recess (9) has a leading surface (21) extending from the recess (9) towards the ridge (3) at an obtuse angle on the side facing away from the tip. Key according to any one of the preceding claims, characterized in that the side recess (5) is provided with a front haunch (14) starting in the region of the tip of the shaft (2) and pointing towards the dorsal half-plane of the shaft (2). Key according to any one of the preceding claims, characterized in that the side recess (5) is provided at its end or in the region below one of the shaped notches (8) with a lowering (10) with a bottom (11). Key according to claim 13, characterized in that the distance between the lower (11) bottom (11) and the bottom (13) side recess (5) is equal to or greater than the depth of the notch (8) from the plane of the back (3) . Key according to any one of the preceding claims, characterized in that the shaft (2) has a front chamfer (12) at its tip. Key according to any one of the preceding claims, characterized in that it has a lower stop (1) at the edge facing the cut-out (4) at the tip facing away from the shank (2). A lock cylinder comprising a rotary drum (17) with a keyhole insertion hole (2), a tumbler for blocking the rotation of the drum (17), a fixed bushing (19) with a drum hole (17) and semi-closed tumbler receiving holes (17). 5) characterized in that at least one stop pin with a locking protrusion (7) is arranged inside the drum (17) laterally at the keyhole insertion hole (2), which is directed and extends from the side into the space of the shaft-insertion hole (2). keys for the drum (17). Lock cylinder according to claim 17, characterized in that the opening for receiving the key shank (2) is profiled. Lock cylinder according to any one of claims 17 to 18, characterized in that at least one recess (20) formed eccentrically to the inner wall of the opening of the fixed housing (19) for receiving the drum (17) is provided along at least a portion of the opening. a longitudinal axis of the drum receiving bore (17). Lock cylinder according to any one of claims 17 to 19, characterized in that the surface of the locking shank (2) facing the opening of the key shaft (7) is smooth. -8GB 31995 Ul Lock cylinder according to claim 20, characterized in that the stop pin is vertically movable in the drum (17). Lock cylinder according to any one of claims 17 to 19, characterized in that the face of the locking shaft (2) facing the opening of the key shaft (2) is profiled. Locking cylinder according to Claim 22, characterized in that the stop pin is mounted in the drum (17) to move vertically.