TW202225537A - Keyhole cover - Google Patents

Abstract

A keyhole cover which is configured to be arranged at a lock cylinder in order to cover a key insertion opening of the lock cylinder in a closed state, and can be brought into an open state in which it exposes the key insertion opening for an insertion of a key into the lock cylinder, includes a base body and two cover slides, each of which is supported at the base body displaceable between a respective closed position and a respective open position. In the closed state of the keyhole cover, the cover slides are in their respective closed position and lie with a respective closing edge against one another, while in the open state of the keyhole cover, the cover slides are in their respective open position and have a gap between their closing edges that forms a key passage for the key to pass through along a key insertion direction. Each of the two cover slides is supported at the base body displaceable between its closed position and its open position, in particular linearly, along a respective displacement direction which is oriented inclined to the key insertion direction and forms, for example, an angle in the range between 30DEG and 60DEG with the key insertion direction.

Description

keyhole cover

The invention relates to a keyhole cover arranged on a lock cylinder.

A typical lock cylinder includes a cylindrical shell and a generally rotatable cylindrical core supported within the cylindrical shell so that when the tumbler is not moved to the release position by the key, the cylindrical core will be locked by the tumbler and cannot be relative to the cylindrical shell. turn. To this end, the key with the key shaft must be inserted into the key slot of the cylinder core through the key insertion opening of the lock cylinder along the key insertion direction, so that the coding segment of the key shaft corresponding to the corresponding lock code of the lock cylinder can hit the tumbler, to move them to the release position.

A common problem is that dust can also enter the key slot of the lock cylinder through the key insertion opening, which may affect the mobility of the tumbler and/or the insertion of the key, and thus ultimately the function of the lock cylinder. This is especially true for the cylinders of outdoor locks such as bicycle locks.

To prevent the entry of dust, the key insertion opening may be provided with a cover. However, the cover must be removed when inserting the key into the cylinder, and the cover must be re-applied after the key is removed. In order not to interfere as much as possible with the use of the corresponding lock, it is suitable to configure the cover as a keyhole cover, usually, at least substantially permanently, directly or indirectly (for example by means of a corresponding lock or a corresponding door fitting) ) at the lock cylinder (ie, the area in front of the key insertion opening of the lock cylinder). The keyhole cover can then cover the lock in the closed state The key insert of the cylinder prevents the entry of dust, but can also be opened to actuate the lock cylinder. In the open state, it exposes a key insertion opening for insertion of a key corresponding to the lock cylinder.

Before inserting the key (that is, the key shaft of the key) into the lock cylinder (that is, the key slot of the cylinder core of the lock cylinder), the keyhole cover must be changed from the closed state to the open state. This may affect the convenience of using the corresponding lock, since the user of the lock not only has to hold and insert the key to operate the lock, but also has to open the keyhole cover beforehand. Therefore, he may need to use both hands or only be able to grab the key when the keyhole cover has been opened.

The keyhole cover can usually be configured to be opened by the key (especially the tip of the key shaft), so that the opening of the keyhole cover and the insertion of the key into the cylinder can be performed in succession, especially when one hand is used. However, in order to facilitate the operation of the lock cylinder, a particularly smooth interaction between the key and the keyhole cover is required. However, the keyhole cover should not be opened too easily, otherwise the problem of dust ingress cannot be easily overcome.

An object of the present invention is to provide a keyhole cover provided on a lock cylinder, which allows a user of the lock cylinder to operate simply and conveniently, and reliably protects the lock cylinder from dust entering.

This object is achieved by a keyhole cover having the features of claim 1 . Advantageous embodiments are disclosed in the dependent claims, this specification and the drawings.

The keyhole cover is configured to be disposed at the lock cylinder to cover the key insertion opening of the lock cylinder in a closed state. For this reason, the keyhole cover is preferably configured to be disposed in front of the key insertion opening of the lock cylinder. At the lock cylinder, the provision of the keyhole cover can include direct attachment at the lock cylinder. As an alternative or in addition to a direct arrangement, the keyhole cover can also be arranged indirectly at the lock cylinder, eg attached to a corresponding lock comprising the lock cylinder, in particular to the lock housing of the lock or to the door fitting of the lock superior.

In addition, the keyhole cover can be in an open state, which exposes a key insertion opening for insertion of a key or a key shaft of a key into the lock cylinder. The keyhole cover of the present invention includes a base body and two sliding covers, wherein the two sliding covers are individually supported on the base body and can move between corresponding closed positions and corresponding open positions.

Therefore, the slide cover is a movable element to cover the key insertion opening. The sliding cover must be substantially adapted to be configured with a movable mounting on the base body and which, in the closed state of the keyhole cover, can cover the key insertion opening of the lock cylinder where the keyhole cover is located. The term slide refers to this applicability and is not limited to configurations beyond the two slides herein, ie the slide can be configured in many different ways.

The slide cover is preferably configured in one piece. Furthermore, the base body is also preferably configured in one piece.

In the closed state of the keyhole cover, the two sliding covers are in their respective closed positions and abut against each other by their respective closing edges. The closed state of the keyhole cover can be defined in particular by the fact that the two slides are in their respective closed positions such that the closing edge of one slides against the closing edge of the other slide.

In contrast, in the open state of the keyhole cover, the two sliding covers are in their respective open positions with a gap between their closed edges, which gap (where appropriate together with the through openings formed in the base body ( through opening), as described later), forms a key passage for the key to pass through in the key insertion direction. The open state of the keyhole cover can be specifically defined by the fact that the two slides are in their respective open positions, so that the closed edges of the slides are spaced apart from each other and the key can thus pass through the key passage formed between the closed edges Reach the key insertion slot of the corresponding lock cylinder. Thereby, the key channel can advantageously form an extension of the keyway of the cylinder in the direction of key insertion.

The key insertion direction can be specifically defined by the geometry of the key channel. For example, the key insertion direction can correspond to the axis of symmetry of the keyway. Additionally, the keyway can have an at least substantially constant A defined cross-section, and this cross-section is transverse to the direction in which the key and its key shaft may be inserted into or through the key channel, which direction then corresponds to the key insertion direction. For example, the cross-section can be at least substantially rectangular, it can have two shorter sides and two longer sides, the longer sides preferably being at least three times as long as the shorter sides. The longer side can in particular be formed by the closed edges of the two slides, while the shorter side can be formed by the base body.

Furthermore, regardless of the cross-section of the key channel, the closed edges of the two slides preferably have a straight profile perpendicular to the key insertion direction. The closed edges can thus be aligned with each other (in particular parallel to each other). Furthermore, the closing edge does not have to be configured as a sharp edge, but can also be curved and/or form a surface area, thus also having an extension in the direction of key insertion, so that the closing edge is not only opposite to the edge of the key channel opposite each other Correspondingly, it further corresponds to the mutually opposite side walls forming the keyway. In the case of the closed edge as the surface area, the closed edge is preferably aligned parallel to the direction of key insertion.

The cross section of the key channel preferably corresponds to, and in particular is at least substantially complementary to, the cross section of the key shaft of the key associated with the lock cylinder. As such, upon insertion, the key is guided through the keyway of the keyhole cover and aligned in the key insertion direction for further insertion into the lock cylinder. In order to enable the key inserted into the lock cylinder to still rotate, the keyhole cover should also be configured to rotate along a rotation axis parallel to the key insertion direction when the keyhole cover is arranged at the lock cylinder, and the rotation axis preferably extends from the center through the key. hole cover.

In this context, although also generally, it is preferred that the keyhole cover (in particular at least its base body) has a circular outer contour with respect to its extension perpendicular to the key insertion direction (and thus radial to the axis of rotation). In particular, the cross-section of the base body perpendicular to the key insertion direction can have an at least substantially circular outer contour.

Furthermore, the base body can include a bottom surface, and can be configured to be disposed with the bottom surface at the lock cylinder. This can in particular include contacting the base body with the bottom face on the lock cylinder, in particular on the end face with the key insertion opening on the lock cylinder. However, in principle, the bottom surface of the base of the keyhole cover and the end surface of the lock cylinder can also be protected. There is space, wherein the base body and its bottom surface are preferably arranged at the lock cylinder in a direction toward the lock cylinder, especially toward the end surface. The key insertion direction can be aligned (especially perpendicular) to the bottom surface of the base. The bottom surface can comprise an at least substantially circular shape through which the axis of rotation can pass.

The bottom surface preferably includes a through opening extending from the bottom surface through the base body parallel to the key insertion direction. The cross-section of the opening preferably corresponds to the cross-section of the key channel formed by the gap between the closed edges of the slides when they are in their respective open positions. In this way, the key channel can extend through the opening of the base body and extend through the entire keyhole cover with an at least substantially constant cross-section in the key insertion direction. For example, the key channel can thus comprise a length of about 5 mm (ie an extension in the direction of key insertion). Such a keyway provides good guidance and reduces the risk of jamming when removing the key by placing the corresponding key smoothly on the side of the keyway.

According to the invention, the two slides are individually supported at the base body to move between their closed position and their open position, in particular linearly (that is, along a straight path) in a displacement direction oblique to the key insertion direction . Therefore, the displacement direction has both a vector component parallel to the key insertion direction and a vector component perpendicular to the key insertion direction.

Preferably, by the displacement of the two slides from their respective closed positions to their respective open positions, the slides are moved in opposite directions (i.e. away from each other) perpendicular to the key insertion direction, and at the same time in parallel. Move in the same direction as the key insertion direction (ie in the key insertion direction). Accordingly, the displacements of the two slides from their respective open positions to their respective closed positions are reversed: on the one hand, the slides move towards each other transversely to the key insertion direction, and on the other hand they are opposite to the key insertion direction move together.

The displacement of the movable sliding cover supported at the base body in such an oblique direction advantageously causes a collision of the sliding cover in the key insertion direction, which not only causes the sliding cover to move in this direction, but also causes the sliding cover to move laterally. away from each other in the key insertion direction to their respective open positions. In this way, pressing the key against the sliding cover in the insertion direction enables the keyhole cover to be easily brought into the open state. In order to open the keyhole cover to insert the key into the lock cylinder, the key can be moved in a continuous motion in the key insertion direction towards the lock cylinder and through the keyhole cover into the keyway of the cylinder of the lock cylinder, so that the key itself passes through the keyhole cover and cause the slides to slide into their respective open positions until a key passage is formed through which the key can pass to the lock cylinder.

The sliding of the two slides in an oblique direction thus makes inserting the key channel particularly easy. Due to the inclined direction, the impact force makes the sliding of the slides particularly labor-saving, especially when the slides are only movable perpendicular to the key insertion direction. Compare.

The linear movement of the slide facilitates reliable and easy insertion of the key into the lock cylinder via the keyhole cover, since the slide can be guided and supported on the base body in a particularly simple manner along a defined linear path. Therefore, it is particularly advantageous to exclude the situation that the sliding cover is inclined or toppled.

each of the two slides is supported at the base movably in two displacement directions, each of which can for example form an angle with the key insertion direction in the range between 30° and 60°, and An angle in the range between 40° and 50° is preferably formed, in particular the angle of one or both of the slides can be about 45°. Preferably, the two displacement directions form the same angle as the key insertion direction, eg 45°, but point in different directions.

In particular, the two displacement directions can be directly oriented in directions in which their respective vector components perpendicular to the key insertion direction are opposite to each other. If the displacement direction and the key insertion direction are considered as lines intersecting at one point, these lines may lie in a plane. According to an advantageous embodiment, the key insertion direction can correspond to the bisector of the angle between the displacement directions of the two slides (bisector of the angle between the displacement directions). This symmetry contributes to the simple structure and simple kinematics of the keyhole cover.

According to a further advantageous embodiment, the two sliding covers are identical in structure and are arranged axially symmetrically about an axis parallel to the direction of insertion of the key. Their production is simplified due to the identical structure of the slides. The slides can thus be arranged with one of them rotated by 180° about the axis of symmetry, so that the closed edges of the slides face each other, so that when the keyhole cover is in the closed state, they rest against each other.

In general, independent of the above-described embodiments, according to a further advantageous embodiment, the base body can be constructed axially symmetrically with respect to an axis parallel to the direction of insertion of the key. If the sliding cover is arranged axially symmetrically as described above, this axis can be the axis of symmetry of the base body. Specifically, the entire keyhole cover can also be constructed symmetrically about this axis.

According to an advantageous embodiment, the two slides each comprise at least one coupling portion, wherein the coupling portions of the two slides cooperate in such a way that when one slide is moved, the other slide is moved to an equal extent. Specifically, the coupling parts of the two slides interact in a mutually guiding manner. If each of the two slide covers includes more than one coupling portion, the coupling portions preferably interact in pairs, that is, each coupling portion of one slide cover interacts with exactly one coupling portion of the other slide cover, vice versa. Interaction can in particular include two corresponding interaction couplings abutting against each other and sliding along each other by displacement of the slide and/or collision of one of these couplings on the other. If the two interacting coupling parts abut against each other, the boundary surfaces on which they abut against each other are preferably oriented perpendicular to the key insertion direction.

The at least one coupling portion of the corresponding slide is preferably configured as a protrusion protruding towards the corresponding other slide (ie, in particular, in the same direction in which the closing edge of the corresponding slide faces). The protrusion protrudes from the remainder of the slide, preferably at least approximately perpendicular to the key insertion direction. Thus, in this case, when the slides are in their respective open positions, the coupling portion of one slide and the coupling portion of the other slide can also interact and thus at least cause their respective closing edges to be separated from each other .

Displacement of one slide causes the other slide to be displaced in a corresponding manner, which can in particular include two slides moving the same amount of distance, that is, moving an equal distance in their respective directions of displacement degree. In particular, the coupling parts can advantageously cooperate with each other in such a way that, as a result of the interaction, on the one hand, the two slides always move the same amount of distance in the same direction parallel to the key insertion direction, and therefore Preferably always in the same position relative to the key insertion direction, on the other hand always moving the same amount of distance in a direction perpendicular to the key insertion direction but in the opposite direction, ie towards or away from each other. This advantageously ensures that when one slide is in its closed or open position, the other slide is also in its corresponding identical position, ie also in its closed or open position. The advantage of this configuration is that the keyway cannot be opened wider on one side than on the other, and is therefore preferably always centered over the key insertion opening of the lock cylinder.

According to an advantageous further development of this embodiment, the two sliding covers respectively comprise a first coupling portion and a second coupling portion, wherein the first coupling portion abuts against the second coupling portion along a plane perpendicular to the key insertion direction, And act on the second coupling part of the corresponding sliding cover in the key insertion direction. In this way, a simple but reliable structurally coupled movement of the two slides is achieved.

In other words, this embodiment provides that the two slide covers respectively include a first coupling portion and a second coupling portion, and the individual coupling portions are preferably configured as protrusions protruding toward the corresponding other slide cover, wherein the first coupling portion is The second coupling part of the corresponding sliding cover is pressed against the second coupling part of the corresponding other sliding cover along a plane perpendicular to the key insertion direction, and acts on the second coupling part of the corresponding sliding cover in the key insertion direction in the following way, that is, when a sliding cover is When moved, the other slide moves in a corresponding way. Thus, for (opening) displacements with a movement component in the direction of key insertion, the first coupling portion of the two slides actuates the corresponding second coupling portion of the other slide; for movement with the opposite direction of key insertion With the (closing) displacement of the component, the second coupling portion of the two slides actuates the first coupling portion of the corresponding other slide.

The first coupling portion of the corresponding slide cover can further comprise a contact surface facing the key insertion direction, and the second coupling portion of the corresponding slide cover can further comprise a contact surface facing the opposite direction to the key insertion direction, so that The contact surfaces of the first coupling portion and the second coupling portion lie at least substantially in a common plane perpendicular to the key insertion direction. Therefore, the contact surface of the first coupling portion of one of the two slide covers can be located on the contact surface of the corresponding second coupling portion of the corresponding other slide cover.

Furthermore, it can be advantageous for both slides if the closing edge is between the first coupling part and the second coupling part, especially if the closing edge extends from the first coupling part to the second coupling part. In this way, stable mutual guidance between the sliding covers can be achieved and a meticulous structure is provided.

According to a further advantageous embodiment, the two slides are individually biased towards their closed position. Thus, the keyhole cover is normally in its closed state as long as the slide's bias is not overcome to move it from the closed position, and once the slide is no longer forced to overcome its bias to move it into a position other than the closed position , the keyhole cover also automatically returns to its closed state. Practically, the keyhole cover is therefore not substantially fully in its closed state when the key is inserted or is being inserted through the keyway into the corresponding lock cylinder provided with the keyhole cover. In this way, the keyhole cover can prevent dust from entering the lock cylinder particularly reliably.

The strength of the deflection force can be designed to be relatively strong, especially because of the movability of the inclined orientation of the two slides. As a result of the oblique orientation, the impact force acting on the slide in the key insertion direction has a relatively large vector component that directly opposes the biasing force, thereby overcoming a relatively strong biasing strength, but still relatively easy to insert the key. The advantage of a strong deflection force is that the lock cylinder is particularly reliably protected against contamination. Preferably, the biasing force acts completely parallel to the displacement direction of the corresponding sliding cover.

In principle, it is sufficient that only one of the two slides is biased directly into its closed position and the other is only indirectly biased, especially since the slide is coupled with the other to be displaced in opposite directions to each other (as by the above-mentioned). the interaction of the coupling parts of the two sliders). Preferably, however, both slides are directly biased in their respective closed positions.

Advantageously further developed according to this embodiment, at least one (preferably each) of the two slides contains a corresponding spring seat in which a corresponding spring (eg a coil spring) is at least partially housed, and the spring The seat is supported on the base. The spring biases the corresponding slide to its closed position. The slide cover can also contain more than one corresponding spring seat in which its corresponding spring is at least partially housed. Furthermore, each spring seat preferably contains no other elements other than the corresponding spring.

The spring seat can extend into the corresponding sliding cover, specifically, it is parallel to the displacement direction of the corresponding sliding cover and faces the corresponding other sliding cover. On the other side, ie in the direction away from the corresponding other sliding cover, the spring seat is thus opened so that the spring at least partially accommodated in the corresponding spring seat can protrude from the spring seat in this direction and be supported on the base body. For this purpose, the base body preferably comprises a support surface aligned perpendicular to the direction of displacement of the respective slide and on which at least one of the respective springs is supported.

According to a further advantageous embodiment, the keyhole cover can be configured in a particularly simple manner, comprising no other elements than the base body, the two slides and the spring for biasing the slides. The means for attaching the keyhole cover, in particular the base of the keyhole cover, to the corresponding lock cylinder are not considered elements of the keyhole cover.

According to a further advantageous embodiment, each of the two slide covers comprises a collision zone which is oriented perpendicular to the direction of key insertion and adjoins the corresponding closing edge, so that by hitting the collision zone in the direction of key insertion, the slide The cover is movable from its closed position to its open position along its displacement direction, and wherein, in the closed state of the keyhole cover, the collision areas of the two slide covers lie in a plane and form a common collision area of the keyhole cover. Since the collision zone is perpendicular to the key insertion direction, and the displacement direction of the two slides is inclined to the key insertion direction, the displacement direction is also inclined to the collision zone, ie, neither parallel nor perpendicular.

Since the collision zone is vertically aligned with the key insertion direction, it can be subjected to a collision forward in the key insertion direction to open the keyhole cover (eg by inserting the tip of the key into the corresponding lock cylinder). Displacement direction The inclination relative to the impact zone ensures that the impact is reliably deflected to move the slide in the corresponding displacement direction and then open a gap between the impact zones so that the key can be inserted into the corresponding lock cylinder via the key channel. The transition area between the impact area and the adjacent closed edges of the corresponding slide can be beveled or rounded to allow the key to pass easily through the key slot.

Another advantage that can be produced is, on the one hand, starting from the direction of displacement of the sliding cover relative to the direction of insertion of the key, and on the other hand, starting from the impact area, that is, the impact area can be made relatively large so that it can be easily removed. hit. For example, the common impact zone can be at least substantially circular. In other words, the impact area of the corresponding slide cover can be at least approximately semicircular. The closed edge can then be equal to the diameter of the circle or semicircle. The diameter of the common collision zone can, for example, be at least 33%, preferably at least 40%, of the diameter of the bottom surface of the base body. The surface area of the common impact zone (including the circular transition zone to the closed edge, if necessary) can be, for example, at least 10%, preferably at least 15%, of the (maximum) cross-sectional area of the entire keyhole cover perpendicular to the key insertion direction. %.

According to a further advantageous embodiment, the two slides each comprise one or more corresponding latching means, and the base body comprises one or more corresponding latching means. The latching device of the corresponding one of the two sliding covers can specifically include a latching protrusion, preferably exactly one latching protrusion; the latching device of the base body can specifically include two cutouts, one of which can be connected with the latching of one sliding cover. The protrusions interact, and the other can interact with the latch protrusions of the other slide. However, the reverse is also possible, since both slides comprise a corresponding cutout (in particular exactly one corresponding cutout) as latching means, while the base body has two latching projections, one of which can be connected to the cutout of one slide interact, while the other interacts with the cutout of the other slider.

The present invention further provides an arrangement of the base body and two slide covers for assembly of the keyhole cover, the two slide covers (specifically together with said spring preferably already inserted into the spring seat of the keyhole cover), on the As provided, it is inserted into the receiving area of the base body parallel to the direction in which the key is inserted until its latch is installed. are placed in engagement with the corresponding latches of the base body. This engagement can in particular comprise latching projections formed on the slide cover and/or the base body, which, when inserted, are first pushed back from their rest position and return to their rest position due to the action of the restoring force, and then once The sliding cover is fully inserted into the receiving area of the base body, which then engages in a cutout formed in the corresponding base body or sliding cover.

In the case of an assembled keyhole cover, the two slides are inserted into the receiving area of the base, in particular due to the interaction of one or more latches of the slide with one or more corresponding latches of the base . For example, by the engagement of the latch projection in the cutout, the slide is secured against release from the base in the opposite direction to key insertion. Preferably, there is no other interaction between the sliding cover and the base body, and the sliding cover is held on the base body through the above-mentioned interaction. In this way, the keyhole cover can not only comprise relatively few parts, but can also be assembled in a particularly simple manner, in particular without tools.

The latching means used to secure the sliding cover against its loosening from the base body from the opposite direction of key insertion must not interfere with the movability of the sliding cover in the direction of its displacement. Rather, the latching means can even contribute to this mobility (ie the slide can be moved in the corresponding displacement direction in its defined manner). Specifically, the latching device can be configured in such a way that the corresponding latching device of a corresponding one of the two sliding covers interacts with the corresponding latching device in the corresponding base body, so that the corresponding sliding covers are opposite to each other. The base body is pulled along its displacement direction. For this purpose, for example, a latching device configured as a cutout can comprise a ramp extending along the corresponding displacement direction, along which the latch projection engaging in the cutout can slide. With this configuration, the corresponding slide movement (depending on the starting position of the slide relative to the base body) against the key insertion direction may initially move along the slide due to the superposition of motion components perpendicular to the key insertion direction. It moves in the direction of displacement, and at the same time is finally limited by the latching device, so that the sliding cover can indeed be displaced relative to the base body but cannot be released from the base body.

In order also in the opposite direction (that is, for the movement of the corresponding slide in the key insertion direction) to cause a superposition of the components of the movement perpendicular to the key insertion direction, so that the corresponding slide moves in its displacement direction relative to the base body, Each of the two sliding covers can form at least one corresponding guide surface aligned parallel to the displacement direction, which guide surface is located on the guide surface of the base body and also parallel to the displacement direction, and can slide along the guide surface of the base body. The base body can comprise protruding guide protrusions in the receiving area, wherein at least one guide surface of the base body is formed on the respective guide protrusion.

The invention will be exemplified below in conjunction with the drawings.

11: Keyhole cover

13: Matrix

15: Slider

17: Spring

19: Underside

21: Receiving area

23: port

25: Guide protrusions

27: Guide Surface

29: Guide groove

31: Latch device, that is, the latch protrusion

33: Latch device, i.e. latch cutout

35: Ramp

37: Closed Edges

39: Keyway

41: Spring seat

43: Support Surface

45: The first coupling part

47: Second coupling part

49: Contact Surface

51: Collision Zone

S: key insertion direction

V, V': displacement direction

1 shows a perspective view of a keyhole cover before assembly according to an embodiment of the present invention.

Figure 2 shows a perspective view of the same embodiment in an assembled and closed state.

FIG. 3 shows a perspective view of the same embodiment in an assembled and opened state.

Figure 4 shows a cross-sectional view of the same embodiment in an assembled and closed state.

FIG. 5 shows a cross-sectional view of the same embodiment in an assembled and opened state.

1 to 5 show the same embodiment of the keyhole cover 11 of the present invention in different views and states, respectively. The keyhole cover 11 comprises a base body 13, two sliding covers 15 identical to each other and two springs 17, and no other elements. FIG. 1 shows the slide cover 15 together with the spring 17 detached from the base body 13 and corresponds to the state before the keyhole cover 11 is assembled, while the remaining FIGS. 2 to 5 show the keyhole cover 11 in the assembled state, wherein the slide cover 15 Connected to base 13 with spring 17 interposed therebetween. In this state, by connecting the keyhole cover 11 directly to the lock cylinder or indirectly to, for example, a door fitting including a lock cylinder or a lock, The key hole cover 11 can be directly or indirectly disposed in front of the key insertion opening of the lock cylinder (not shown) to cover the key insertion opening, thereby protecting the lock cylinder from dust intrusion.

The base body 13 includes a circular bottom surface 19 (see FIGS. 4 and 5 ), and the base body 13 is fixed in the direction of the key insertion direction S perpendicular to the bottom surface 19 . The keyhole cover 11 is configured such that the bottom surface 19 of the base body 13 is located on the end surface of the lock cylinder in which the key insertion opening is formed when it is placed on the corresponding lock cylinder. The base body 13 is arranged to be axially symmetrical to an axis parallel to the key insertion direction S, and has a circular cross-section corresponding to the shape of the bottom surface 19 . In other words, the base body 13 does not extend radially beyond its axis of symmetry beyond the bottom surface 19 .

On the side of the base body 13 facing away from the bottom surface 19 and thus oriented opposite to the key insertion direction S, the base body 13 comprises a receiving area 21 (see FIG. 1 ) in which the sliding cover 15 can be received or, after the keyhole cover 11 has been assembled, among them (see Figures 2 to 5). A through opening 23 is formed in the bottom surface 19 , and the through opening 23 extends through the base body 13 in the key insertion direction S so as to connect the bottom surface 19 with the receiving area 21 . The cross section of the through opening 23 is at least approximately rectangular, the lengths of the two long sides are respectively greater than 80% of the diameter of the bottom surface 19, and the lengths of the two short sides are respectively less than one third of the length of the long sides.

The receiving area 21 has a shape in which the two slide covers 15 together with the spring 17 can be inserted in the key insertion direction S. As shown in FIG. The base of the receiving area 21 shares four guide protrusions 25 of the base body 13 facing opposite to the key insertion direction S, two of which are arranged on one of the two long sides of the through opening 23 and two of which are arranged on the other long side . Each guide protrusion 25 has a guide surface 27 which forms an angle of 45° with the key insertion direction S and faces a direction away from the through opening 23 . In this way, two of the four guiding surfaces 27 of the base body are aligned parallel to the first displacement direction V, and the other two guiding surfaces 27 are aligned parallel to the second displacement direction V', so that the two displacement directions V, V' are perpendicular aligned with each other. The guide surfaces 27 parallel to the respective displacement directions V, V' lie in a common plane.

The two slide covers 15 each have two guide grooves 29 which are provided so that when the corresponding slide cover 15 is to be inserted or has been inserted (see FIG. 3 ) into the receiving area 21 of the base body 13 The two guide protrusions 25 on the corresponding sides of the through port 23 of 13 engage with the guide grooves 29 . Inside it, the guide grooves 29 have corresponding guide surfaces (not shown in the drawing due to the corresponding viewing angle or cross-section), which are parallel to the guide surfaces 27 of the guide protrusions 25 engaging the corresponding guide grooves 29, such that The guide surfaces of the corresponding slide cover 15 and its guide grooves 29 are located on the guide surfaces 27 of the two corresponding guide protrusions 25 of the base body 13 and can be parallel to the guide surfaces 27 along the corresponding displacement directions V, V 'slide. Through this interaction, the corresponding sliding cover 15 is pulled along the corresponding displacement directions V, V'.

On the sliding cover 15 , corresponding latching means are configured in the form of corresponding latching projections 31 ; the base body 13 includes two corresponding latching means in the form of cutouts 33 (see FIG. 1 ) in its receiving area 21 . When the slide cover 15 is inserted into the receiving area 21, before the latch protrusion 31 of one slide cover 15 and the latch protrusion 31 of the other slide cover 15 are engaged with the corresponding one of the two cutouts 33, the latch protrusion 31 Pushed back first. Due to this engagement, the sliding cover 15 is secured against loosening from the base body 13 in the direction opposite to the key insertion direction S. As shown in FIG. The insertion of the keyhole cover 11 and thus the entire assembly can be done without tools.

Each cutout 33 individually comprises a ramp 35 which engages in a corresponding cutout 33 of one of its latching protrusions 31 along the displacement direction V, V' of the slide cover 15 (see FIG. 1 ). Therefore, the movability of the corresponding slide cover 15 in the direction opposite to the key insertion direction S is also limited, that is, by sliding the latch projection 31 along the slope 35 of one of the corresponding cutouts 33, the guide The corresponding sliding cover 15 is guided to move along the displacement directions V, V'. In this way, the two sliding covers 15 supported on the base body 13 can only move along their respective displacement directions V, V'.

The two slides 15 are restricted to move only in the distance between the position (see FIGS. 2 and 4 ) and the open position (see FIGS. 3 and 5 ), in which the two slides 15 are adjacent to each other and have an orientation. Corresponding to the closing edges 37 of the other slides 15 ; in the open position, the slides 15 are spaced apart from each other so that a gap is created between the two closing edges 37 , the cross-section of which substantially corresponds to the cross-section of the opening 23 . This gap, together with the opening 23, forms a key channel 39 which extends parallel to the key insertion direction S through the entire keyhole cover 11 (see in particular FIG. 3). The edge 37 is closed to form the side wall of the keyway 39 .

The sliding cover 15 also includes a corresponding spring seat 41, the spring seat 41 extends parallel to the displacement directions V, V' of the sliding cover 15 in the corresponding sliding cover 15, and accommodates the corresponding spring 17 therein (see FIG. 4 and 5). In the relaxed state, the springs 17 protrude from the corresponding spring seats 41 (see FIG. 1 ).

The base body 13 comprises two support surfaces 43 which are arranged on different sides of the through opening 23 according to the guide protrusions 25 . One of the supporting surfaces 43 is vertically aligned with the displacement direction V of one sliding cover 15 , and the other is vertically aligned with the displacement direction V′ of the other sliding cover 15 . In the assembled state of the keyhole cover 11 (see in particular FIGS. 4 and 5 ), the springs 17 are supported vertically on a corresponding one of the support surfaces 43 , so that the slide cover 15 is displaced along its respective closed position in its respective closed position The directions V, V' are biased towards each other.

Specifically, it can be seen in FIG. 1 that the two sliding covers 15 also each include a first coupling portion 45 and a second coupling portion 47 , each of which is configured as a protrusion protruding toward the corresponding other sliding cover 15 . The latch protrusions 31 of the corresponding slide covers 15 are further formed on the second coupling portion 47 . The first coupling portion 45 includes a contact surface 49 that is vertically aligned with the key insertion direction S and points to the key insertion direction S; and the second coupling portion 47 includes a contact surface 49 that is vertically aligned with the key insertion direction S and points in the opposite direction to the key insertion direction S, so that the contact surface 49 of the first coupling portion 45 and the contact surface 49 of the second coupling portion of the respective slide 15 lie substantially in a common plane.

Therefore, the two sliding covers 15 with the same structure and their coupling parts 45, 47 can be interlocked with each other, so that the contact surface 49 of the first coupling part 45 of the corresponding one of the two sliding covers 15 is located on the corresponding other sliding cover on the contact surface 49 of the second coupling portion 47 of the cover 15 . In this way, both sliding covers 15 act on the corresponding other sliding cover 15 in the key insertion direction S and the opposite direction, so that the movement along the key insertion direction S is always driven by the corresponding other sliding cover 15 Or it drives another slider. Since the contact surfaces 49 are perpendicular to the key insertion direction S, the slides 15 can move away from or towards each other in a direction perpendicular to the key insertion direction S, so that the coupling parts 45, 47 slide along each other with their contact surfaces 49. In general, the two slides 15 can move together by their coupling parts 45, 47 only in the key insertion direction S (movement in the same direction as the key insertion direction S, in a direction perpendicular to the key insertion direction S) move in the opposite direction).

On their side opposite to the key insertion direction S, the slides 15 each comprise a collision zone 51 which is perpendicular to the key insertion direction S and adjoins the closing edge 37 of the respective slide 15 and has a substantially semicircular shape shape, the diameter of which is substantially formed by the closed edge 37 . Thus, the transition between the impact zone 51 and the closed edge 37 is rounded. Due to the coupled movement of the slides 15, the collision zones 51 of the two slides 15 are always located in a common plane, and their collision zones 51 abut each other when the slides 15 are in their respective closed positions. Thus, in the closed state (see FIGS. 2 and 4 ), the two impact areas 51 form a common, substantially circular impact area for the keyhole cover 11 , which is relatively larger for the keyhole cover 11 . . By the impact force in front of one of the collision areas 51, the two sliding covers 15 can overcome their respective deflections in a simple manner at the same time and move to their respective open positions along their respective displacement directions V, V', to form a key channel 39 for the key to pass through.

Therefore, the keyhole cover 11 of the present invention can reliably protect the corresponding lock cylinder from the entry of dust, and can be easily and conveniently opened to introduce the key.

11: Keyhole cover

13: Matrix

15: Slider

17: Spring

37: Closed Edges

43: Support Surface

45: The first coupling part

47: Second coupling part

51: Collision Zone

S: key insertion direction

Claims (10)

A keyhole cover arranged on a lock cylinder to cover a key insertion opening of the lock cylinder in a closed state, wherein the keyhole cover can be brought into an open state, and in the open state, the key insertion opening is exposed for a key Insert the lock cylinder, wherein the keyhole cover (11) comprises a base body (13) and two sliding covers (15), each sliding cover being supported on the base body (13) and capable of being in a corresponding closed position and corresponding moving between open positions, wherein, in the closed state of the keyhole cover (11), the two sliding covers (15) are in their respective closed positions and abut against each other with their respective closed edges (37), and Wherein, in the open state of the keyhole cover (11), the two sliding covers (15) are in the respective open positions and have a gap between the closed edges (37) thereof, the gap forming a key channel ( 39), for the key to pass through along the key insertion direction (S), characterized in that, Each of the two sliding covers (15) is supported on the base body (13) and can move between the closed position and the open position, in particular linearly along the corresponding displacement direction (V, V') , the movement direction is relatively inclined to the key insertion direction (S) and forms an angle with the key insertion direction (S) in the range of 30° and 60°, preferably in the range of 40° and 50° angle, specifically about 45°. The keyhole cover according to claim 1, wherein the displacement directions (V, V') of the two sliding covers (15) and the key insertion direction (S) are located in a plane; and/or Wherein, the key insertion direction (S) corresponds to the angle bisector between the displacement directions (V, V') of the two sliding covers (15). The keyhole cover according to claim 1 or 2, wherein the two sliding covers (15) have the same structure and are axially symmetrical about an axis parallel to the key insertion direction (S). A keyhole cover as claimed in any one of the preceding claims, wherein the base body (13) is formed axially symmetrically about an axis parallel to the key insertion direction (S). A keyhole cover as claimed in any one of the preceding claims, wherein each of the two slide covers (15) comprises at least one coupling portion (45, 47), preferably towards the respective other of the A protrusion is formed in the direction of the sliding cover (15), and Wherein, the interaction of the coupling parts (45, 47) of the two sliding covers (15) is as follows: when one sliding cover (15) moves, the other sliding cover (15) moves in a corresponding manner. The keyhole cover of claim 5, wherein each of the two slide covers (15) includes a first coupling portion (45) and a second coupling portion (47), wherein the first coupling portion ( 45) Located on the second coupling portion (47) of the corresponding other slide cover (15) along a plane perpendicular to the key insertion direction (S), and acted on the corresponding other slide cover along the key insertion direction (S) The second coupling portion (47) of the cover (15). A keyhole cover as claimed in any preceding claim, wherein each of the two slide covers (15) is biased towards its closed position. A keyhole cover as claimed in claim 7, wherein at least one of the two sliding covers (15), preferably each, comprises a corresponding spring seat (41), the corresponding spring (17) at least partially accommodated In the spring seat and supported on the base body (13), and bias the corresponding sliding cover (15) to its closed position. A keyhole cover as claimed in any one of the preceding claims, wherein each of the two sliding covers (15) includes a collision zone (51), the collision zone (51) being perpendicular to the key insertion direction (S ) and abuts the corresponding closed edge (37), Wherein, by hitting the collision zone (51) in the key insertion direction (S), the sliding cover (15) can move from the closed position to the open position along the displacement direction (V, V'), and Wherein, in the closed state of the keyhole cover (11), the collision area (51) of the two sliding covers (15) is located in a plane and forms a common collision area of the keyhole cover (11). A keyhole cover according to any of the preceding claims, wherein each of the two slide covers (15) comprises one or more corresponding latching means (31), in particular corresponding latches protrusions, and this base body (13) contains one or more corresponding latching means (33), in particular two cutouts, Wherein, the base body (13) and the two sliding covers (15) are configured for the assembly of the keyhole cover (11), so that the two sliding covers are inserted with (15) parallel to the key insertion direction (S) to the receiving area (21) of the base body (13) until its latching means (31) engage with the corresponding latching means (33) of the base body (13).

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