EP4355165A1 - Key case, key head and key box - Google Patents

Abstract

The invention relates to a key case, the housing shell of which comprises at least two walls, between which or hi at least one of which a space is formed for storing at least one key, the housing being provided with at least one locking mechanism to prevent the key from falling out of the housing spontaneously. The invention also relates to possible modifications of the key head for storage in the housing, comprising either modifying the side walls of the key head and securing the key head with a cap, if necessary, or enclosing the key head in the housing, while exhibiting a plan shape identical to the shape of the cut-out in the housing. The invention also relates to a key box comprising at least two cases, the shell of which comprises at least two walls between which, or in at least one of which, a space is formed for storing at least one key, the case being provided with at least one locking device to prevent the key from falling out of the case spontaneously, the at least two cases being connected to each other.

Description

Key case, key head and key box Technical Field

The subject of the invention relates to a key case for arranging a key carrier for one or more flat keys in a single cohesive unit and protecting the same, positioning and modifying a key head to facilitate the storage of keys in the case, and positioning a key box comprising a plurality of connected key cases in a single unit.

Background Art

The key case is usually a case in the form of a soft cover, made of leather, leatherette or textile, or a hard cover, such as plastic, wood or metal, in which the keys are freely stored without any particular claim to their logical or spatial arrangement

The only element that provides a very simple and widespread form of arrangement inside the case is the connecting hinge ring, which is sometimes firmly connected to the case itself by means of tape, string or chain. Thus the casing does not take the form of an organiser. Its aim is not functionality in the sense of arranging the keys inside the case with the aim of maximising the clarity of their storage and, as far as possible, making them as easy to remove and store as possible while minimising the dimensions of the case itself. The sole purpose is to hold the keys together and to store them together in the case to protect other soft, abrasion-sensitive objects stored near the keys which could damage the keys with their sharp edges. The design of the packaging is aimed solely at creating the best aesthetic impression.

Although the published Czech invention application PV 2010-200 proposes a form of key organiser, the aim of which, however, is to arrange keys of several forms, including three- dimensional ones, and is therefore considerably complex and involves, firstly, the modification of the keys themselves before they are placed in the case and, secondly, the subsequent assembly into a complex set of locks which allow the key to be fixed and ejected before use in the door lock. Each individual addition of another key to the case always requires disassembly and assembly of the case itself. This solution also does not have the shape of a flat key and certainly not the similarity to a bank card, so that the case cannot subsequently be stored in a bank card organiser and similar products.

Another example of a housing for flat patent keys for so-called cylinder inserts is given in patent US 2694921. Here, however, the keys are also arranged with flat sides together and stored in guide mechanisms which are firmly interconnected to form a single block. The keys are linearly slid out and in by means of sliders. However, the overall arrangement increases the space requirements for the resulting dimensions of the housing.

A further technical solution, which may be considered to be derived from the above- mentioned US patent, is provided for in US patent 2 344 581, according to which the key is firmly connected to the slider with the possibility of rotation and a name plate is placed at the opposite end of the slider. It thus incorporates the aforementioned disadvantages of the original solution. Another technical principle, similar to the ones mentioned above, is applied to the known key fob. Here, the key is deprived of the circular or square segment which is intended to be grasped by the hand when the key is turned in the lock door before it is inserted into the supporting frame. Extension and retraction of the key in the case is here solved by turning it around a common pin threaded through a hole in the key head. This arrangement, however, apparently presupposes the arrangement of a plurality of keys in a common frame, which itself then serves to hold the hands firmly when the selected key is turned in the door lock. Otherwise, for example, when one, two or three keys are stored together, the two dimensions of the frame transverse to the axis of the shank are so small as to make it impossible to grip the frame firmly by hand and to make it difficult to turn the key in the door lock. Alternatively, the frame may need to be left wider, even though its internal space for storing additional keys is unused. There is also still the need to disassemble the frame of the case before inserting the key into the case, whereby the key must be inserted on the common pin and the case reassembled.

Summary of the Invention

The subject matter of the present invention is a key case, as well as a modification to the key head directed to facilitating the storage of the key in the case, and a key box which is composed of cases which are independently usable and are a separate subject matter of the present invention.

The essence of the invention is that the shell of the case comprises at least two walls between which, or in at least one of which, a space is formed for storing at least one key, the case being provided with at least one locking device to prevent the key from falling out of the case spontaneously.

The inter may be implemented by a number of technical measures. It may be formed by a space between the face of the housing shell and the reverse side of the housing shell at the key seating positions, the space between the face of the housing shell and the reverse side being less than the thickness of the key.

The interlock may be formed by a resilient plate which is mounted in the central wall of the housing shell, the lower end of which is mounted in a groove and the upper end of which is provided with a slope.

The interlock is formed by a protrusion formed on the inner surface of the reverse face of the housing shell and fits into a hole in the key head.

A further possibility of implementing the locking means is to use at least one magnet which is located either in the housing shell and/or in the key head, or in the key head cap or in the cover.

The interlock may be formed by a notch in the side walls of a cut-out in the central wall of the housing shell or in the face wall of the housing shell.

The interlock may further be formed by overlapping the cut-out in the outer portion of the face wall of the housing shell. The housing face may be provided with at least one external recess to facilitate removal of the key from the housing.

The space for storing the key in the housing shell comprises a cut-out and an internal recess in the housing shell, the inner lower wall of the cut-out having a shape corresponding to the lower shape of the key head.

A cut-out for the key is made either in all the walls of the case shell or only in one of them.

The housing shell may be fitted with an illumination system. The illumination system consists of a diode with an anode and a cathode and a switch consisting of a sliding slide with a single- cell battery and a stop.

The head of the key, after any modification of the side walls of the key head, is provided with a cover or is molded or pressed into the cover, the plan shape of which is identical to the shape of the cut-out in the housing.

The cap or cover of the key head is provided with a recess at the top for gripping the key contained in the housing shell. The key cap or key head cover may be provided with a magnet at the bottom.

The cap is removable, comprising two walls, at least one of which is provided internally in the longitudinal axis with a ball cap which fits into a hole in the key head to secure the cap to the key head.

The key box includes at least two housings, the shell of which comprises at least two walls between or in at least one of which is formed a space for storing at least one key, the housing having at least one locking device to prevent the key from falling out of the housing, and the at least two housings being connected together.

The key box may consist of only two cases in which the keys are stored, the two cases being firmly attached to each other by their largest surfaces of identical plan.

The individual cases are most often connected to each other by a hinge mechanism. The hinge mechanism, which always connects two adjacent cases, is located identically on one of the two longitudinal sides of the key box, the hinge mechanisms together forming one key box back.

The hinge mechanism is located alternately on two opposite longitudinal sides of the key box, each hinge mechanism forming two fold-out backs of the folder.

The aim of the present invention is to make it easier for users of the key case and the key box to handle keys in their daily lives. The invention forms a single, compact unit and is therefore suitable for storing cases in various file organizers of products of similar shape and nature. In the case of a case having the size and shape of a bank card, but of a thickness greater than that of the bank card, the case can be stored in bank card organizers, which are, for example, wallets. Alternatively, the case can be simply placed in a pocket of a garment or in a personal bag without the risk of damage to the garment, bag or objects stored with the keys in the garment pocket or personal bag due to the pressure of soft or non-abrasion resistant objects on the sharp edges of the keys not otherwise arranged and protected by the case. Brief Description of the Drawings

The accompanying drawings show examples of alternative embodiments of the invention, which are generally based on the rectangular shape of the housing.

Figure 1 shows a schematic representation of the housing in axonometric view in a simple longitudinal alternative, with a conventional flat key that is not modified.

Figure 2 shows a representation of the housing in a simple alternative, corresponding to Figure 1, but in a transverse view.

Figure 3 shows schematically a possible method of steadying the key in the housing by means of a flat blade.

Figure 4 schematically illustrates another possible way of steadying the key in the housing by means of a protrusion on the inside of the reverse side of the housing shell.

Figure 5 schematically illustrates another, basic alternative embodiment of the housing in axonometric view in a longitudinal embodiment in which the head of a conventional key is modified and provided with a fitted cap.

Figure 6 illustrates an embodiment of the invention according to Figure 5, but in a transverse variant of the key arrangement.

Figure 7a shows the modified key of the previous embodiments shown in Figure 5 and Figure 6 with the cap fitted, and Figure 7b shows the same embodiment of the key as in Figure 7 a, but the cap is not yet fitted.

Figure 8 shows schematically the modification of the key head by moulding it into the housing, including a recess to facilitate handling of the key in the housing.

Figure 9 schematically shows a detail of a cut-out in the housing shell at a location under the key head cover in the alternative where the key head is pre-pressed into the housing, including a recess for securing the key in the housing.

Figure 10 schematically shows a detail of a key as shown in Figure 9, but from the lower inner side, wherein the head cover has a recess into which the opposite protrusion fits when the key is inserted into the housing.

Figure 11 schematically illustrates an embodiment of the sleeve, wherein the locking of the key in the sleeve is accomplished by a magnet disposed in a recess of the sleeve.

Figure 12 schematically illustrates a key from the underside with the head encased in a housing, which houses a second magnet for securing the key in the housing.

Figure 13 schematically illustrates another alternative embodiment of the key housing, wherein a cut-out for storing the key head is made in all walls of the housing, in a longitudinal variant. Figure 14 schematically illustrates the design of the housing according to Figure 13, but in a transverse variant.

Figures 15 and 16 show schematically an alternative embodiment of the key housing in longitudinal and transverse versions, using a standard key without additional modification of the key head, wherein a key head cap is replaceably fitted to the standard key head.

Figures 17a to 17e show schematically in axonometric view how the key cap is positioned on the key head, wherein Figure 17d shows schematically a section through the key cap and Figure 17e shows a side view of the key cap according to Figure 17e.

Figures 18a and 18b show a cut-out in the housing with a modification to secure the key in the housing, wherein the top wall of the housing shell exhibits a slight overhang over the cut-out to prevent the key from falling out of the housing.

Figure 19 schematically illustrates the housing illumination system with the diode and sliding switch of the diode in the unlatched position.

Figure 20 shows the housing lighting system with the sliding diode switch in the closed position.

Figure 21 shows schematically the connection of two housings into one double box.

Figure 22 shows the connection of two housings by a hinged mechanism into one folding box.

Figure 23 schematically illustrates the joining of three sleeves into a single box so that the box with the sleeves can be opened or unfolded by means of a hinged mechanism into a book form, and

Figure 24 schematically illustrates an alternative embodiment of the box by joining two adjacent sleeves in the form of a cardboard book.

Detailed Description of the Invention

The subject matter of the present invention is a key case which forms a system for arranging keys into a single cohesive unit carrying one or more keys, in particular flat patent cylinder keys, and a flat key box which includes a plurality of key cases connected into a single unit.

The basic dimensions of the case are based on the internationally harmonised dimensions of bank payment cards and thus the physical characteristics of the identification cards are determined, as well as the surface dimensions and the determined rounding of the comers of the rectangular version of these cards. However, the invention does not focus only on the rectangular shape of the case. The invention can be used for any shape of the case, in particular for circular shapes or irregular shapes.

The thickness of the key case is greater than the thickness of the credit card according to the present standard, in order to allow for the storage of fiat keys, which typically have a thickness of up to 2,5 mm. The keys can be arranged in the case in a single layer or, where appropriate, in several layers. It is essential that file flat keys for the cylinders be placed in a solid, flat housing in a continuous surface and form a single, compact unit with the housing. The case may be stored separately, for example, in bank card organisers of various kinds, such as wallets, or the case may be placed simply in a pocket of clothing or in a personal bag without risk of damage to the clothing, the bag or the objects stored with the keys in the pocket of clothing or in the personal bag due to the pressure of soft or abrasion-resistant objects on the sharp edges of the keys, otherwise arranged and not protected by the case.

The keys are inserted and withdrawn individually into the case by a single pull, most commonly in the number of three keys in the rectangular basic case shape, with a longitudinal variant or a transverse variant with four keys. The basic form of the case, which has a single layer of keys, can be further layered and combined to form a larger case.

A rigid box composed of two sleeves, where access to one or the other sleeve is provided by simply turning the box towards the user with one or the other sleeve, proves to be most advantageous. The user then selects a suitable key on the side of the box facing him and removes it for use, or retracts the key and stores it for future use.

In this box, which combines two cases of the same variant, twice the number of keys is thus organized, that is, six keys for the longitudinal variant of key storage in the surface, or eight keys for the transverse variant of key storage in the surface. Of course, it is possible to combine bushings with different key storage variants, i.e. the longitudinal variant of one bushing and the transverse variant of the other bushing. In two bushings connected in this way, seven keys are stored.

The cases can be layered without limitation, hi the case of three or more bushings, however, access to the individual keys becomes more difficult. In order to allow access, the individual key cases can be joined together to form boxes in which the individual key cases are connected to each other by a hinge mechanism.

In the case of a parallel arrangement of any number "n" of cases by means of a common hinge mechanism, but preferably so that cases one through "n-1" are connected to each subsequent case in a row by a separate hinge mechanism, the case of cases folding out or folding up in book form. Each such sleeve then forms a separate box of such a book.

In the case of a serial arrangement of sleeves, where two adjacent sleeves are always connected by a separate hinge mechanism, the cards can be folded and unfolded in the form of a cardboard book or accordion, where each sleeve consists of one page of a cardboard book.

These versions of three or more sleeves, however, are already so thick with respect to the thickness of the individual keys and thus their sleeves that it is difficult or impossible to insert such sleeves into conventional organizers for, for example, bank cards and other products which are adapted to the flat dimensions of a bank card. However, the other functionality of these articles, that is, the storage, clarity and aesthetics of the key storage, is retained.

Example 1

The invention comprises several alternatives or modifications depending on the method of attaching and storing the key 4 in the cut-out 2 of the case and thus removing or inserting it into the cut-out of the case, regardless of the given spatial longitudinal or transverse variation of their storage, as explained in the previous text.

In the case of the first, simplest variant, as illustrated in Figures 1 to 4, the housing shell 1 comprises a cut-out 2 and an internal recess 5 for accommodating and inserting the key 4, the key 4 being a flat key, in this case with a circular head 3. The inner bottom wall 35 of the cut-out 2 has a shape corresponding to the bottom shape of the head 3 of the key 4, so that the key 4 rests against the inner bottom wall 35 of the cut-out 2 when fully inserted into the housing. The head 3 of the key 4 may have a shape other than circular, for example square or oval, but it is always a flat key. The casing shell 1 has an outer recess 34 in the face wall 18 at the edge, which partially exposes the head 3 of each key 4 inserted, and this key 4 can thus be ejected by the pull of an attached finger, which the user rests against the projections 13 in the head of the key 4, or against the round hole 15 in the head 3 of the key 4, which is partially or completely exposed due to the outer recess 34 in the face wall 18 of the casing.

This round hole 15 served primarily for hanging the key on a key support ring, which is not used in this case of organization and storage of keys. In order to give the casing shell 1 a continuous edge in plan, for example in the shape of a rectangle the size of a bank card, the cut-out 2 for handling the key 4, i.e. for removing it from the casing, is formed only on the face wall 18 of the casing, or on the face wall 18 and the central wall 12 of the casing, while the reverse wall 19 of the casing is without the cut-out 2. If the reverse wall 19 also has a cut-out 2, it is possible that when inserting the sleeve into an organiser, such as a bank card organiser, the sleeve, whose areal dimensions correspond to the dimensions of a bank card, could be caught by the edge of the cut-out 2 by an unobstructed key 4 on the edge of a pocket in the organiser which is used for inserting a bank card or other product of the size of a bank card. This would result in difficult handling.

If the reverse wall 19 also has a cut-out 2, it could be the case that when inserting the case into an organiser, for example a bank card organiser, the case, whose planar dimensions correspond to the dimensions of the bank card, would be caught by the edge of the cut-out 2 by an uncovered key 4 on the edge of a pocket in the organiser which is used for inserting a bank card or other product of the size of a bank card. This would result in difficult handling.

All embodiments of the invention may be formed of either two walls, where machining or moulding on one or both walls, as the case may be, may produce a cut-out 2 and an internal recess 5 for accommodating a key 4 when they are flush-mounted. The cut-out 2 and internal recess 5 may also be formed in the central wall 12 of the housing shell 1, wherein the face wall 18 and the reverse wall 19 need not be machined.

The key 4 in the cut-out 2 and recess 5 of the housing is held in a variant of several possible ways. The first way, illustrated in Figures 1 and 2, is by simply tensioning the face wall 18 and the reverse wall 19 of the housing due to the pressure of the inserted key 4 against these walls of the housing.

Another possibility is to secure the key 4 in the housing according to figure 3 by means of a metallic flexible blade 7 or a flexible wire placed in the groove 9, so that the head 3 of the key 4 rests against this flexible blade 7 as the key is inserted along the side, the greatest pressure on the flexible blade 7 being exerted by the key 4 just before it is fully inserted or extended. The flexible blade 7 is provided with a bend at the lower end 8 which engages the recess 14 at the lower end of the groove 9 and secures the flexible blade in this position. At the opposite, i.e. upper end 10, the flexible blade 7 is provided with a slope 11.

In the groove 9 of the housing, formal by moulding or grinding, depending on the material of the housing, the metallic flat flexible blade 7 is arranged so that it is firmly fixed at the lower end 8 in the groove 9, while its other end is free, so that it has one degree of freedom lying in the plane of the housing and perpendicular to the axis of the flexible blade 7 or to the direction of movement of the key 4. When the key is inserted, the head 3 of the key 4 rests laterally against the free end of the flexible blade 7, the greatest pressure being exerted on the flexible blade 7 by the key 4 just before its complete insertion into the cut-out 2 and the inner recess 5, respectively, and just before its ejection. The elastic blade 7 then restrains the key 4 from spontaneously sliding out of the housing, whereby the key 4 can only be released from the housing by placing a finger of the user on the head 3 of the key 4 and pushing the finger outwards from the housing.

Another possibility of securing the key 4 in the housing is by means of a protrusion 13 with a spherical surface on the inside of the housing cover, as shown in Figures 4 and 5.

The protrusion 13 is formed by moulding or grinding, depending on the material used in the manufacture of the housing, and is in file form of a spherical canopy having a plan view of the same radius as the hole 15 in the head 3 of the key 4 and the central axis of the spherical canopy coincides with the central axis of the hole 15 in the key 4 when the key 4 is fully inserted into the cut-out 2, so that when the key is inserted, it slides over the inner surface of the housing and over file protrusion 13, which imposes an increased resistance to sliding until the protrusion is firmly seated in the hole in the key head. The protrusion 13, together with the sleeve cover, is partially sprung.

Example 2

This example embodiment is shown in more detail in the following figure 8, wherein the key 4 in this alternative shows a cut circular, possibly oval or square shape of file head 3 on two opposite sides parallel to the longitudinal axis of the key 4.

The head 3 of the key 4 is subsequently encased, or moulded, in a cover 20 which is preferably made of the same material as the housing material and which, when the key 4_is inserted into the cut-out 2 and the internal recess 5, forms one continuous unit with the housing. Thus, the cover 20 of the key head 3 of the key 4 forms a recessed part of the housing, comprising the key head 3 of the key 4 enclosed or moulded therein, while allowing a more rigid and compact arrangement of the entire housing. This variant of file invention is illustrated in Figures 8 to 12.

Since the head 3 of the key 4 must first be shaped into a suitable, tapered shape and then moulded or pressed firmly into the housing 20 of the head 3 of the key 4, it is convenient to so shape the key in the raw version supplied as part of the complete housing. The user then receives the raw key so modified for the case and then has it ground to the lock insert in a manner analogous to the manufacture of duplicate keys.

The housing 20 of the head 3 of the key 4, which is rigidly connected to the key, has a cut- out 21 on the outer surface near the outer edge, the most suitable shape being the cavity of the ball portion. However, other shapes, such as a straight groove, are also possible in order to allow the inserted key 4 to be easily ejected by pulling an attached finger, preferably with the fingernail of a finger which the user rests against the cut-out 21.

The firm connection of the key 4 with the housing body, which prevents the key 4 from spontaneously sliding out and falling out of the housing, is made possible by a projection 22 in the bottom of the cut-out 2 of the housing, which has a spherical surface and is formed on the inside of the reverse wall 19 of the housing. This projection protrudes into a space defined just so that the socket portion of the key 4 slides over the inner portion of the face wall 18 of the housing, but does not allow it much freedom. The protrusion 22 thus imposes a resistance in the sliding of the key insert portion 4, but such that it can be overcome by pressure of the thumb on the key insert portion 4. The resistance of the protrusion 22 disappears after the key insert portion 4 has been fully inserted into the cut-out 2 and the inner recess 5 of the housing, when the key insert portion 4 is inserted into the housing one step at a time and the protrusion 22 engages the dimple 23 on the underside of the key insert portion 4 of a similar shape. This may be a groove extended perpendicularly to the movement of the key, so that the projection 22 fits better into the dimple 23, but more particularly of the same depth as the projection 22.

Another possibility of securing the key in the housing are small magnets 16 with inverted poles, embedded in the socket part of the key 4 and in the housing, whereby the distance between the poles of the two magnets 16 and hence the greatest attractive force is generated at the moment when the socket part of the housing with the key 4 is inserted to the stop into the housing.

A pair of thin magnets 16, one of which is located in the cover 20 of the head 3 of the key 4 and the other in the opposite position in the reverse wall 19 of the housing 1, performs a similar function to the system of projections 22 and the dimple 23. The location of the magnets is indicated in figure 11 and figure 12.

A further possibility of securing the position of the key 4 in the housing is shown in Figure 18a and 18b, where a cut-out 2 in the housing is shown with the outer face wall 18 of the housing shell 1_being modified by a slight overlap 36 over the cut-out 2 to prevent the key 4_from falling out of the housing.

Example 3

The reduced baseline alternative is derived from example number 2 and is shown in Figure 13 and Figure 14 in longitudinal and transverse versions. It differs in that the sleeve has a reduced overall thickness by the portion that forms the reverse wall 19 of the sleeve below the socket portion of the key 4 in the basic unthinned alternative. The socket portion of the key 4, in particular the head 3 thereof, is thus easily grasped by the fingers of the user's hand from both sides. There is therefore no need for a recess 21 to be formed on the outer surface of the key 4 socket portion, as in the basic unthinned variant, because by opposing pressure with two fingers, for example the thumb and forefinger, sufficient frictional force can be achieved between the fingers and the socket portion of the case to overcome the force which keeps the key 4 compact in the case. Alternatively, this force is provided either by a flat metallic flexible blade 7, as in Example 1, or by small magnets 16 with inverted poles in the socket portion of the key 4 and in the housing, whereby the distance between the poles of the two magnets and thus the greatest attractive force occurs at the very moment when the socket portion of the housing with the key 4 is inserted to the stop into the housing, that is, as in Example 2, the magnets 16 being located in the central part of the housing.

Example 4

This example is a combination of the first two variants according to example numbers 1 and 2, in which a flat cap 24 is additionally fitted in a removable manner to the finished lock key 4, thus not necessarily a raw key and without a cut head, to form the socket portion of the housing. This solution is illustrated in Figure 15 and Figure 16. The plan view of the head 3 of the key 4 extends beyond the outer contour of the socket part.

In order to allow a firm connection between the key 4 and its cap 24, which will form the socket part of the housing, the cap is provided on at least one side, but preferably on both opposite inner sides of the cavity of the cap 24 which surrounds the key head, with a ball cap 25 which fits into the hole 15 in the head 3 of the key 4. This is clearly visible in Figure 17d and Figure 17e. The plan view of the ball cap 24 has the same radius as the hole 15 in the head 3 of the key 4, and the axis of the ball cap 25 coincides with the axis of the hole 15 in the head 3 of the key 4, when the cap 24 is slid onto the head 3 of the key 4, so that the ball cap 25 fits firmly into the hole 15 in the head 3 of the key 4.

In this arrangement, there is no unwanted rotation of the cap 24 of the socket portion on the head 3 of the key 4 about the head 3 of the key 4 because the axis of rotation of the cap 24 about the head 3 of the key 4 does not coincide with the axis of the hole 15 into which the ball cap 25 fits. As soon as a force is exerted during the handling of the key 4, which could cause the cap 24 to rotate around the head 3 of the key 4, the ball cap 25 on the inner side of the cap 24 will rest against the edges of the hole 15 in the head 3 of the key 4_and thus prevent the key 4 from rotating. The key 4 is held in the cut-out 2 and in the inner recess 5 of the housing in the same manner as in Example 1 by a flat metal flexible blade 7, placed at each head 3_of the key 4, so that it rests on this flat flexible blade 7 during the insertion of the key 4, the greatest pressure on the flexible blade 7 being thus exerted by the key 4 immediately before full insertion, or as in Example 2 by the projection 22 and the dimple 23, respectively, through the small magnets 16. For the positioning of the magnet 16 in the cap 24 of the head 3 of the key 4, the opening 15 in the head 3 of the key 4 under the cap 24 of the head 3 of the key 4 can be used.

Because the head 3 of the key 4 has a greater width than the cap 24, the housing exhibits an additional notch 33 at the point of the cut-out 2 for inserting the head 3 of the key 4 which is wider than the cut-out 2 for inserting the cap 24 of the key 4.

All embodiments of the housing with a key 4 can be provided with an LED 26 and a mechanical switch to switch the LED 26 with a wire anode 27 and a wire cathode 28. This mechanical switch is formed by a sliding glider 30 with an inserted single-cell battery 29 and a check gate 3L This construction is illustrated in Figure 19 and Figure 20.

One electrode of the diode 26 freely but permanently contacts one surface, and thus one shell contact, of the single-cell battery 29 disposed in the sleeve of the slide switch; the other electrode contacts the other pole on the sleeve of the single-cell battery 29 when the switch is moved to the left, thereby completing a short circuit to light the diode 26. The invention also includes a key box comprising a plurality of key cases as described in each of the above embodiments. The key boxes in various forms of embodiment are shown in Figures 21 to 24. It is possible to attach two key boxes to each other so that they are firmly attached to each other by their largest surfaces of identical plan.

It is also possible to layer the housings into a single box so that the box with the housings can be opened or unfolded. Each of two adjacent housings are always connected to each other by a separate hinge mechanism 17. When these hinged mechanisms 17 are located on one of the longitudinal sides of the case, the case unfolds in the form of a book and the hinged mechanisms 17 together form one back 37 of the key box 4.

In the case where these hinged mechanisms 17, connecting two adjacent housings, alternate regularly in position on opposite sides of the box, the book is unfolded in the form of a booklet. Such a construction is illustrated in Figure 24.

Industrial Applicability

The subject matter of the present invention is particularly useful for the arrangement Mid protection of flat patent keys for cylinders and for the protection of articles which are stored together with the keys in common areas.

List of reference numerals

1 housing shell

2 cut-out

3 head

4 key

5 internal recess

6 shank

7 flexible blade

8 lower end

9 groove

10 upper end

11 slope

12 central wall

13 protrusion

14 cavity

15 hole

16 magnet

17 hinge mechanism

18 face wall

19 reverse wall

20 cover

21 recess

22 projection

23 dimple

24 cap

25 ball cap

26 diode

27 anode

28 cathode

29 single-cell battery

30 sliding glider

31 check gate

33 notch

34 outer recess

35 inner bottom wall

36 overlap

37 back

Claims

1. A key case, characterized in that the housing (1) of the case comprises at least two walls between which, or in at least one of which, a space is formed for storing at least one key (4), the case being provided with at least one locking device to prevent the key (4) from falling out of the case spontaneously.

2. The key case according to claim 1, characterized in that the locking device is formed by a space between a face wall (18) of the housing shell (1) and a reverse wall (19) of the housing shell (1) at a location for storing the key (4), wherein the space between the face wall (18) and the reverse wall (19) is smaller than the thickness of the key (4).

3. The key case according to claim 1, characterized in that the locking device is formed by a resilient blade (7) which is provided in the central wall (12) of the housing shell (1), the lower end (8) of which is provided in a groove (9) and the upper end (10) of which is provided with a slope (11).

4. The key case according to claim 1, characterized in that the locking device is formed by a protrusion (13) formed on the inner surface of the reverse wall (19) of the housing shell (1) and fits into a hole (15) in the head (3) of the key (4).

5. The key case according to claim 1, characterized in that the locking is formed by at least one magnet (16) which is located either in the housing shell (1) and/or in the head (3) of the key (4), or in the cap (24) of the head (3) of the key (4) or in the cover (20).

6. The key case according to claim 1, characterized in that the locking is formed by a notch (33) in the side walls of the cut-out (2) of the central wall (12) of the housing (1) or in the face wall (18) of the housing (1).

7. The key case according to claim 1, characterized in that the lock is formed by an overlap (36) over the cut-out (2) of the outer part of the face wall (18) of the housing (1).

8. The key case according to claim 1, characterized in that the face wall (18) of the shell (1) is provided with at least one external recess (34) to facilitate the removal of the key (4) from the case.

9. Key case according to claim 1, characterized in that the space for storing the key (4) in the housing shell (1) comprises a cut-out (2) and an inner recess (5) in the housing shell (1), wherein the inner bottom wall (35) of the cut-out (2) has a shape corresponding to the bottom shape of the head (3) of the key (4).

10. The key case according to claim 9, characterized in that the cut-out (2) for accommodating the head (3) of the key (4) is formed either in all the walls (12, 18, 19) of the shell (1) of the case, or only in some of them.

11. The key case according to claim 1, characterized in that the housing shell (1) of the case is provided with an illumination system.

12. The key case according to claim 1, characterized in that the illumination system comprises a diode (26) with an anode and a cathode (28) and a switch comprising a sliding slider (30) with a single-cell battery (29) and a check gate (31).

13. A key head for storage in a housing according to any of the preceding claims, characterized in that, after possible modification of the side walls of the key head (3), the key head (4) is provided with a cover (24) or is moulded or pressed into a housing (20) having a plan shape identical to the shape of the cut-out (2) in the housing shell (1).

14. The key head according to claim 13, characterized in that the cap (24) or the cover (20) of the key head (3) of the key (4) is provided at the top with a recess (21) for gripping the key (4) stored in the housing shell (1).

15. The key head according to claim 13, characterized in that the cap (24) or the cover (20) of the head (3) of the key (4) is provided with a magnet (16) at the lower part.

16. The key head according to claim 13, characterized in that the cap (24) is removable, comprising two walls, at least one of which is provided internally in the longitudinal axis with a ball cap (25) which fits into a hole (15) in the head (3) of the key (4) to secure the cap (25) to the head (3) of the key (4).

17. A key box, characterized in that it comprises at least two housings, the housing shell (1) of which comprises at least two walls between which or in at least one of which a space is formed for storing at least one key (4), the housing being provided with at least one locking device to prevent the key (4) from falling out of the housing spontaneously, and the at least two housings being connected to each other.

18. The key box according to claim 17, characterized in that it comprises two sleeves in which the keys (4) are stored, the two sleeves being rigidly connected to each other by their largest surfaces of identical plan.

19. The key box according to claim 17, characterized in that the individual cases are connected to each other by an articulated mechanism (7).

20. The key box according to claim 17 and 19, characterized in that the hinge mechanism (17) connecting each two adjacent cases is located identically on one of the two longitudinal sides of the key box, and the hinge mechanisms (17) together form a single back (37) of the key box (4).

21. The key box according to claims 17 and 19, characterized in that the hinge mechanism (17) is arranged alternately on two opposite longitudinal sides of the key box, and all the articulating mechanisms (17) form two disassembled backs (37) of the cardboard- like key box.