Turnbuckle lock

Abstract

The invention relates to a turnbuckle lock (10), in particular a safety turnbuckle lock, said turnbuckle lock comprising: a lock housing (1) and a locking actuator (4) which is rotatably mounted therein and which is connected to a locking element (5), in particular a locking tongue, and which, together with the locking element (5), can be rotated back and forth about an axis of rotation (D) between a locking position and an unlocking position in order to lock and unlock a door; a back-rotation lock (6) for securing the position of the locking actuator (4) at least in its locking position, wherein the back-rotation lock (6) has a first securing element (6.1) and a second securing element (6.2) and wherein the two securing elements (6.1, 6.2) co-operate with one another in order to prevent unintentional rotation of the locking actuator (4), wherein the first securing element (6.1) is arranged to rotate with the locking actuator (4) and the second securing element (6.2) is mounted on the lock housing (1) for conjoint rotation therewith, wherein the second securing element (6.2) is designed as a slotted guide.

Description

[0001] Cam lock

[0002] The invention relates to a cam lock, in particular a safety cam lock, with a lock housing and a locking actuator rotatably mounted therein, which is connected to a locking element, in particular a locking tongue, and which, together with the locking element, can be rotated back and forth about a rotation axis between a locking position and an unlocking position for locking and unlocking a door, with a reverse rotation lock for securing the position of the locking actuator in at least its locking position, wherein the reverse rotation lock has a first securing element and a second securing element, and wherein the two securing elements interact with one another to prevent unintentional rotation of the locking actuator. Corresponding cam locks are used in various fields of technology to lock doors so that they can then no longer be opened.In some applications, special attention must be paid to ensuring that the cam locks cannot be opened accidentally. This could be the case, for example, if the door is subject to jerky movements or vibrations, which could then lead to unintentional movement of the cam lock's locking mechanism, even over an extended period, and in the worst case, even to unintentional unlocking.

[0003] Backturn locks are generally characterized by the fact that they prevent unintentional movement, so that the cam locks cannot be moved even after extended periods. There are also backturn locks that feature, for example, geared or self-locking gears. However, unlike backturn locks, these cannot generally provide sufficient security against unintentional locking or unlocking, especially during extended periods of use and in situations subject to strong vibrations.

[0004] To ensure reliable locking, so-called safety quarter turn locks are used. These locks feature a safety feature, at least in the locked position, so that the quarter turn locks cannot be accidentally unlocked, even in the event of prolonged vibrations or shocks. A well-known safety quarter turn lock, which has proven to be very reliable in practice, is described, for example, in WO 2009 / 103 414 A1. This safety quarter turn lock has a reverse rotation lock consisting of a first locking element that can be rotated back and forth using an actuating shaft, and a fixed second locking element. The first locking element is designed as a guide slot that is preloaded in the axial direction and is angled at 90 degrees at both ends.The second securing element corresponds to a pin on the housing side which is guided in the guide slot. When the locking position is reached, the pin moves automatically into the end-side unwinding of the guide slot and thus interacts with the first securing element, so that any rotational movement of the locking actuation is prevented and this is thus secured in position. A projection is provided between the two angled ends, which means that direct transfer of the second securing element from one end to the other and thus between the locking position and the unlocking position is not possible. Instead, in order to rotate the locking actuation and to transfer it, for example, from the locking position to the unlocking position, the guide slot orthe locking mechanism must be moved in the axial direction so that the pin is transferred to the upper part of the guide slot and the locking mechanism can be turned again.

[0005] While this design reliably prevents unintentional movement of the locking mechanism and thus unintentional unlocking, it requires the pin to be inserted through the housing wall into the guide slot during assembly, which can be challenging. This is because it is impossible to determine from the outside whether the guide slot inside the bolt housing is aligned in such a way that the pin can engage it, and in particular, it is not easy to determine how the position of the guide slot needs to be changed to allow the pin to engage. Overall, this makes assembly comparatively complex.

[0006] Based on this, the invention sets itself the task of providing a cam lock, in particular a safety cam lock, which is characterized by simpler assembly. This task is achieved in a cam lock of the type mentioned above in that the first securing element is arranged so as to rotate with the locking mechanism, and the second securing element is arranged so as to be fixed against rotation with the lock housing, wherein the second securing element is designed as a slotted guide.

[0007] The non-rotatable arrangement of the second locking element on the bolt housing simplifies assembly, as the second locking element no longer needs to be blindly threaded into the already installed first locking element. The second locking element can be connected directly or indirectly to the bolt housing, as will be explained in more detail below.

[0008] By designing the second securing element as a slotted guide, the first securing element can be guided in the second securing element. The slotted guide can be designed in such a way that it allows, at least in sections, a relative movement of the first securing element in the slotted guide and prevents, at least in sections, a rotational movement. By preventing a rotational movement, the locking mechanism can be secured in position so that it cannot be moved accidentally. The slotted guide can thus be used to implement a reverse rotation lock. In addition, the slotted guide can also have a guiding function that ensures that the locking mechanism cannot become jammed during a rotational movement.

[0009] Furthermore, it has proven advantageous if the first securing element is movable between a release position, in which the locking actuation can be rotated back and forth between the locking position and the unlocking position, and a securing position in which a rotational movement is prevented. In order to move the locking element back and forth between the locking position and the unlocking position, it is first necessary to move the first securing element into the release position. The first securing element can be pretensioned towards the securing position. To this end, the two securing elements can interact with one another to prevent unintentional rotation of the locking actuation in the securing position, and the locking actuation can be rotatable about the rotation axis in the release position to actuate the locking element.

[0010] To move the first safety element between the release position and the safety position, it can be arranged to be movable in the axial direction. To move the first safety element from the safety position to the release position, it can be moved into the bolt housing in a linear direction along the rotational axis. To move the first safety element from the release position to the safety position, the first safety element can then be moved in the opposite direction.

[0011] With regard to the locking actuation, it has proven advantageous if it has a first actuation unit and a second actuation unit. The two actuation units can be arranged one behind the other in the axial direction in the lock housing. The first actuation unit can be arranged on the outside with regard to the lock housing and the second actuation unit on the inside. This means that the second actuation unit can be arranged between the bottom of the lock housing and the first actuation unit. From a structural point of view, the two actuation units can be cylindrical in shape and rotationally symmetrical to the axis of rotation. The first actuation unit can have a receiving space, in particular designed concentrically to the axis of rotation, into which the second actuation unit can engage at least in sections via a profile contour.The second actuating unit can thus be guided at least partially in the first actuating unit.

[0012] The first securing element can be prestressed toward the securing position. To this end, the two securing elements can interact with each other to prevent unintentional rotation of the locking mechanism in the securing position, and the locking mechanism can be rotatable about the rotation axis in the release position. The prestress can be provided by a spring, in particular a spiral compression spring. The spring can be arranged between the first and second actuating units and, in particular, concentrically to the rotation axis. The spring can thus prestress the first actuating unit relative to the second actuating unit, in particular into the locking position, and accordingly also the first securing element relative to the second securing element.

[0013] It has also proven advantageous if the first actuating unit is rotationally coupled to the second actuating unit. The two actuating units can thus be rotated together about the rotation axis. For rotational coupling, the second actuating unit can have a profile contour, in particular a square contour, on the side facing the first actuating unit, and the first actuating unit can have a corresponding receptacle, in particular in the manner of a square bore, which can be adapted to the geometry of the profile contour. The two actuating units can be rotationally coupled to one another via the receptacle and the profile contour.

[0014] Furthermore, in a particularly preferred embodiment, the two actuating units can also be rotationally coupled to one another via the first securing element. For this purpose, the first securing element can extend, in particular in the transverse direction, through the two actuating units and thus ensure a positive rotational coupling.

[0015] From a design perspective, it has proven advantageous if the first actuating unit has a bore, in particular a cylindrical one, and / or the second actuating unit has a bore, in particular designed as an elongated hole. Provision can be made for the first securing element to extend through the bores of the two actuating units, thus connecting them to one another. The bores of the two actuating units can be aligned with one another to enable a connection via the first securing element. The first securing element can be guided for linear movement in the bore designed as an elongated hole and can thus be moved in the axial direction.

[0016] A relative rotational movement can thus be prevented by the first securing element extending through the two actuating units. The first securing element can be designed as a pin, which can in particular have a circular cross-section. The first securing element can protrude laterally, in particular on both sides, relative to the locking actuation or the two actuating units, and this protruding region can function as a projection which can interact with the second securing element in order to selectively prevent a rotational movement of the locking actuation. The first securing element can be guided in the second securing element. The design of the second securing element can be such that only certain movements of the first securing element are possible. The locking actuation can be carried out via the first securing element orbe secured in position via the interaction of the first and second securing elements. Furthermore, it has proven advantageous if the two actuating units are arranged so as to be movable relative to one another in the axial direction. Advantageously, the second actuating unit is arranged so as to be immovable in the axial direction and is thus fixedly mounted in the axial direction in the closure housing or the sleeve explained in more detail below, whereas the first actuating unit is movable in the axial direction, i.e., in the direction of the rotation axis, relative to the second actuating unit and thus also relative to the second securing element and the closure housing.

[0017] This relative movement can be realized by designing the bore of the second actuating unit as an elongated hole. The first securing element can be moved together with the first actuating unit relative to the second actuating unit. The first securing element can be moved in the elongated hole, which can thus serve as a guide. In the securing position, the first securing element can rest against one end of the elongated hole, in particular the outer end, and in the release position, the first securing element can rest against the other end of the elongated hole, in particular the inner end. The ends of the elongated hole can thus function as stops for limiting an axial movement of the first actuating unit or the first securing element.

[0018] Furthermore, it has proven advantageous if the locking mechanism is designed such that the first actuating unit must first be moved in the axial direction for rotation. Due to the axial movement, the two securing elements can disengage, so that the anti-reverse lock no longer blocks movement of the locking mechanism. This design allows for a push-and-turn mechanism, so that the locking mechanism must first be pressed and then turned, particularly regardless of whether it is to be rotated from the locked to the unlocked position or from the unlocked to the locked position.

[0019] Furthermore, it has proven advantageous if the actuating unit extends through a recess in the bottom of the bolt housing and is connected to the locking element in the area protruding from the bolt housing. The locking element is advantageously positively mounted on the locking actuation and secured to it via a screw bolt.

[0020] Specifically, the second actuating unit can be connected in a rotationally fixed manner to the locking element, in particular the locking tongue. For this purpose, the second actuating unit can have a profile contour, in particular in the form of a square contour, on which the locking element can be arranged in a rotationally fixed manner. The locking element can thus be rotated in the same direction around the rotation axis together with the locking actuation or with the two actuating units.

[0021] Furthermore, the second actuating unit can have a collar that projects circumferentially in the radial direction and has a larger diameter than the recess in the base of the closure housing. Thus, the base can act as an axial stop for the second actuating unit, so that the second actuating unit cannot pass through the base or the recess due to the collar. The collar can then prevent axial movement of the second actuating unit or the locking actuation in one direction, and the locking element connected to the second actuating element can prevent movement in the other direction.

[0022] With regard to the locking housing, it has proven advantageous if it has a collar that can come into contact with the outside of the door when the locking housing is mounted on the door. The collar can rest on the outside of the door, thus providing a stop for the positioning of the locking housing. In order to firmly connect the locking housing to the door, it can also have a thread onto which a nut can be screwed to fix the locking housing to the door. Once the nut is screwed on, the door can thus be fixed between the collar and the nut, so that relative movement of the locking housing is no longer possible.

[0023] Furthermore, the breech housing can have a base and a recess in the base through which the locking mechanism, in particular the second actuating unit, can extend, as already explained above. The base can be designed to project radially inward, so that it represents an axial stop for the sleeve or the locking mechanism during assembly. Overall, the breech housing can have a cylindrical geometry, and the rotational axis can extend centrally through the breech housing.

[0024] According to an advantageous development of the invention, the lock housing has two stops to limit the rotational movement of the locking element. One stop can be assigned to the locking position and one stop can be assigned to the unlocking position, so that the two stops ensure that the locking element can only be rotated back and forth within the rotational angle range between the locking position and the unlocking position. The two stops can be offset from one another in the circumferential direction by slightly more than 90 degrees, so that the rotational angle range of the locking element and the locking actuation is correspondingly limited to 90 degrees. The locking element can have a stop lug, which can be designed to protrude in the axial direction parallel to the rotation axis and which comes into contact with one of the stops in the locking position and in the unlocking position.Due to the width of the stop nose, the two stops can be offset from each other in the circumferential direction by slightly more than 90 degrees to ensure a rotational movement of 90 degrees.

[0025] With regard to the design of the second securing element, it has proven advantageous if it has at least one projection extending in the radial direction. The projection can extend from the inside of the sleeve in the direction of the rotation or actuation axis, so that the first securing element can engage behind the second securing element or the corresponding projection. The projection can thus extend into the receiving space of the lock housing, in which the locking actuation can be accommodated. The projection can be part of a slotted guide, which can prevent movement of the first securing element in certain directions. The projection can thus be designed as a movement limiter for the first securing element.

[0026] From a design perspective, it has proven advantageous if the projection has a strip-shaped geometry. The projection can therefore extend primarily in the circumferential direction. This means that the geometric extension in the circumferential direction can be greater than the geometric extension in the axial direction. Furthermore, the projection can also have a block-shaped geometry. With this design, the geometric extension in the circumferential direction and the geometric extension in the axial direction can be approximately the same. Overall, the projection can be arranged such that it can be located in the lower half of the receiving space of the bolt housing. This allows the actual locking of the locking actuation to take place quite far inside the bolt housing, which also makes the ingress of dust or dirt into this area less likely.

[0027] According to an advantageous development, the projection has an inner surface designed as a sliding surface, on which the locking actuation is guided. The locking actuation can thus slide on the sliding surface during actuation or during rotation about the axis of rotation. The projection can thus function as a sliding bearing for the locking actuation, in particular for the first actuation unit. The inner surface can therefore be the surface of the projection that is aligned parallel to the inner surface of the lock housing and which therefore faces the axis of rotation. If several projections are provided, as will be described in more detail below, the respective sliding surfaces of the projections can jointly guide the locking actuation. The projections are advantageously arranged so as to be evenly distributed in the circumferential direction.

[0028] A further advantageous development of the invention provides that the second securing element has at least two projections, wherein the projections are arranged at a distance from one another and an intermediate space is arranged between the ends of each of the two projections. Due to the circumferential arrangement, two intermediate spaces can thus also be provided. The intermediate spaces can be at the same height as the projections in the axial direction and these can be arranged in the circumferential direction between the projections or between the ends of two adjacently arranged projections. The intermediate space(s) can be designed as securing contours in which the first securing element can be secured against rotational movement in the securing position. The projections and intermediate spaces can be part of the slotted guide or the projections and intermediate spaces can form the slotted guide.From a functional point of view, it has proven advantageous if the first securing element can be moved into one intermediate space in the unlocked position and into the other intermediate space in the locked position, and in particular can latch into the latter. If the first securing element is arranged in an intermediate space, a rotational movement of the locking element can be prevented due to the projections. Thus, the unlocked position of the locking element or the locking actuation can be assigned to one intermediate space and the locking position of the locking element or the locking actuation can be assigned to the other intermediate space. The two intermediate spaces can be offset or spaced apart from one another by 90 degrees in the circumferential direction, so that the locking actuation can then also be rotated back and forth by 90 degrees between the locking position and the unlocked position.The locking connection can be achieved by preloading the first actuating unit relative to the second actuating unit. This means that the first locking element can be moved into the gaps by the spring provided between the two actuating units. No further manual intervention is required.

[0029] Furthermore, it has proven advantageous if the first securing element can engage behind the projection in the release position. In the release position, the locking actuation and thus also the first securing element can be rotated back and forth between the locking position and the unlocking position. The first securing element can engage behind the projection so that the first securing element is then arranged between the projection and the base of the bolt housing. Due to the pre-tensioning of the first securing element, it can be pressed from below, i.e. from the direction of the base of the bolt housing, with a certain force against the corresponding underside of the projection. This pre-tensioning force can then result in the first securing element automatically engaging in a gap when it reaches this gap and then being secured between two projections. The projection can therefore serve as a guide orThe first securing element can be guided behind the projection in the release position, and the two gaps or securing contours can be connected to each other via the guide. Thus, the first securing element can be guided back and forth between the two gaps.

[0030] According to a further advantageous development, the second securing element has four projections, wherein the projections are arranged at a distance from one another and a gap is arranged between the ends of each projection. This design is particularly characterized by its high degree of variability. This is because the four projections also result in four gaps and therefore four different positions in which a rotational movement of the first securing element can be prevented. The gaps can each be offset from one another by 90 degrees in the circumferential direction and can therefore be distributed at a regular distance around the circumference. Overall, this design means that the same cam lock can be used for both a left-hinged and a right-hinged door.

[0031] Furthermore, it has proven advantageous if at least one projection has a stop surface for limiting a rotational movement of the locking actuation, in particular in the release position. The stop can prevent over-rotation and can ensure that the first securing element can be moved from the release position into the securing position between the projections when a stop is reached. Due to the stop, a stop on the bolt housing side, which limits movement of the locking element, can sometimes be dispensed with. Advantageously, the locking element is rigidly rotationally coupled to the locking element. This means that there is no intermediate gear, but rather a movement of the actuating unit through a certain angle leads to an identical movement of the locking element. In this respect, limiting the movement of the actuating unit orof the first securing element, a reliable rotation limitation of the locking element can be achieved at the same time.

[0032] According to an advantageous development of the invention, two opposing projections are connected to one another via a connecting section to form a, in particular U-shaped, slotted guide. A further projection can be arranged between the two interconnected projections, thereby resulting in a U-shaped slotted guide, and the two intermediate spaces are connected to one another via a channel. The interconnected projections can each have a stop surface, so that the rotational movement of the first securing element is limited in both directions. In this respect, a stop on the breech housing side can be dispensed with in this embodiment. The connecting section can have the same radial extent as the projections and can therefore also extend from the wall of the breech housing or the sleeve in the direction of the axis of rotation.The connecting section can be circumferentially encircling and in this respect the wall thickness of the breech housing or sleeve can be reinforced in this area. The above-mentioned channel can be arranged between the connecting section and the projection that is not connected to any other projection. Furthermore, the connecting section can be arranged between the projections and the base of the breech housing. According to an advantageous development of the invention, it is provided that the second securing element is integrally formed on the breech housing. The second securing element or the projection(s) can thus be part of the breech housing and directly connected to the breech housing. Advantageously, the second securing element is integrally formed on the breech housing and thus monolithically connected to the breech housing. Casting processes, for example, can be used for production.However, machining processes can also be used to machine the inside of the bolt housing to create the second locking element. The second locking element or projection can thus be molded onto the cylindrical inside of the bolt housing.

[0033] In addition, the second securing element can also be firmly connected to the bolt housing in another way, for example, via a soldered, welded, or adhesive connection. In this respect, it is also possible to subsequently insert the second securing element into the bolt housing. Radial recesses can also be provided in the bolt housing, into which the projections can be inserted from the inside.

[0034] Furthermore, it can be provided that the projection(s) extend through openings in the breech housing. The breech housing can, for example, have radial openings through which the projection(s) can be inserted from the outside of the housing, so that they extend in the direction of the axis of rotation and can then protrude from the inside of the breech housing in the manner described above. This configuration can have manufacturing advantages. In this case, too, a soldered, welded, or adhesive connection can be provided. However, a screw connection is also possible, i.e. the projection(s) can be screwed into the breech housing. It is also possible for the projection(s) to be implemented by end elements attached from the outside of the housing.

[0035] According to an alternative embodiment of the invention, the second securing element is arranged on a sleeve that is arranged in the bolt housing in a rotationally fixed manner. In this embodiment, the second securing element is therefore not connected directly to the bolt housing, but rather the sleeve is connected to the bolt housing and the second securing element is connected to the sleeve. By arranging the second securing element on the sleeve, it is possible for the two securing elements to interact or engage with one another before assembly in the bolt housing, and for the locking actuation to therefore already be mounted in the bolt housing in a positionally secured manner. This simplifies the assembly process overall. However, compared to arranging the second securing element on the bolt housing, at least one additional element in the form of the sleeve is required.

[0036] To prevent the sleeve from rotating relative to the bolt housing, particularly when the locking mechanism is actuated, it has proven advantageous if the sleeve has at least one, particularly four, lugs projecting in the axial direction, which can engage in receptacles on the bolt housing side in order to connect the sleeve to the bolt housing in a rotationally fixed manner. The lugs and the receptacles can thus ensure a reliable, positive connection between the sleeve and the bolt housing. The lug(s) can extend in the axial direction, i.e. in the direction of the rotation or actuation axis. The lugs can thus be designed as axial projections. The receptacle(s) can be designed to correspond to the lug(s) and thus also extend in the axial direction. The receptacles can thus be designed as axial recesses.Four lugs and, correspondingly, four receptacles have proven advantageous in practice to ensure a reliable, positive connection and prevent relative movement. The lugs and recesses are advantageously evenly distributed around the circumference, so that they are each spaced 90 degrees apart. Overall, the sleeve can thus be secured against rotation relative to the bolt housing.

[0037] With regard to the design of the sleeve, it has proven advantageous to have it constructed as a one-piece sleeve. This design allows for very simple assembly. This is because it is possible to first mount the locking actuator or the two actuating units in the sleeve and then arrange the sleeve and locking actuator together as an assembly unit in the bolt housing. The one-piece, monolithic sleeve thus ensures simple assembly and reliable handling.

[0038] Furthermore, it has proven advantageous if the sleeve has a cylindrical section that is closed in particular on the circumference and a collar section that protrudes radially relative to the cylindrical section. The sleeve can thus have a cup-shaped geometry. The outer surface of the cylindrical section can be adapted to the inside of the breech casing, so that the cylindrical section or its outer surface can lie largely flat against the inside of the breech casing in the assembled state. The inner diameter of the breech casing and the outer diameter of the cylindrical section can thus be the same or approximately the same. The cylindrical section can thus have a guiding function during assembly in the breech casing. At the outer end, the collar section can protrude in the radial direction on the circumference of the cylindrical section.The collar portion can thus be visible from the outside when assembled, whereas the cylinder portion can be arranged invisibly within the breech housing. The breech housing can have a recess adapted to the collar portion so that the collar portion can be aligned with the top of the breech housing. The sleeve or collar portion can then be arranged within the contour of the breech housing.

[0039] According to an advantageous development of the invention, the sleeve, in particular the collar portion, can be connected to the bolt housing in a form-fitting manner. This form-fitting connection ensures that the sleeve cannot rotate relative to the bolt housing. The sleeve can thus represent a reliable, fixed bearing for the rotatable locking mechanism. This also ensures fixed and predetermined locking and unlocking positions and prevents slippage.

[0040] From a design perspective, this can be achieved by arranging the lug, in particular the lugs, on the collar portion. The lug(s) can, as explained above, extend in the axial direction, starting from the collar portion toward the breech housing. The correspondingly designed breech housing-side receptacles can be arranged on the inside of the collar of the breech housing. The lugs can be distributed evenly circumferentially around the collar portion.

[0041] According to a particularly advantageous development of the invention, it is proposed that the sleeve is designed as a two-part sleeve which has two sleeve sections which can be connected to one another. This two-part design has proven advantageous with regard to assembly and allows simple arrangement of the locking actuation or the two actuation units in the sleeve. For this purpose, the two actuation units can first be arranged in one of the two sleeve sections and then, in a next step, the other sleeve section can be connected to the first sleeve section in order to secure the two actuation units in the sleeve. The sleeve can be designed as a whole in the shape of a tube or cylinder and can be divided longitudinally into two sleeve sections. For the rotatable accommodation of the locking actuation orThe two sleeve sections of the two actuating units can be designed in a shell-like manner. Each sleeve section can have at least one projection. Thus, the first securing element can interact with the second securing element on both sides.

[0042] Furthermore, it has proven advantageous if the two sleeve sections enclose the locking mechanism. The locking mechanism can be arranged in the sleeve or in the two sleeve sections before assembly in the bolt housing, and in a subsequent step, the locking mechanism can be mounted together with the sleeve in the bolt housing.

[0043] According to an advantageous development of the invention, the two actuating units and the sleeve form a pre-assembled assembly unit that can be mounted in the breech housing. This design simplifies assembly because the individual elements, i.e. the actuating units and the sleeve, can be assembled before the actual assembly in the breech housing and then inserted axially into the breech housing as a complete assembly unit. Axial fixation in the breech housing can then be achieved by mounting the locking element on the section of the second actuating unit that protrudes from the breech housing. According to an advantageous design, the two sleeve sections can be designed as identical parts. This has proven particularly advantageous with regard to manufacturing costs.Each sleeve section can have a circumferential angle of 180 degrees, resulting in the shape of a closed hollow cylinder when the two sleeve sections are connected to each other. To achieve reliable locking in the bolt housing, each sleeve section can be equipped with at least one lug to ensure reliable anti-rotation locking. Furthermore, the two sleeve sections can be interlocked to ensure a reliable hold and easy handling of the assembly unit.

[0044] According to a further advantageous embodiment of the invention, the sleeve is designed as a four-part sleeve and consists of four sleeve sections that can be connected to one another. This four-part design can be advantageous with regard to assembly. To simplify assembly, the four sleeve sections can be connected to one another. Reference is made to the above explanations regarding the two-part sleeve. Advantageously, the sleeve sections of the four-part sleeve are also designed as identical parts, which is particularly advantageous with regard to production and production costs. In this design, the sleeve sections can each have a circumferential angle of 90 degrees, so that the connection of the four sleeve sections results in a closed hollow cylinder in which the locking actuator can be arranged.Each sleeve section can be designed with a nose to enable a reliable, positive connection with the bolt housing. Fig. 1a shows a cam lock in a perspective side view.

[0045] Fig. 1 b the cam lock according to Fig. 1a in an exploded view;

[0046] Fig. 1c the cam lock according to Fig. 1a in an exploded view from a different perspective

[0047] Fig. 1d is a perspective sectional view of the cam lock according to Fig. 1a;

[0048] Fig. 1e perspective detailed view of a bolt housing

[0049] Fig. 2a to various perspective views of a cam lock with a second securing element on the lock housing side;

[0050] Fig. 3a to various perspective views of a cam lock with a one-piece sleeve;

[0051] Fig. 4a to various perspective views of a cam lock with a two-part sleeve;

[0052] Fig. 5a to various perspective views of a cam lock with a four-part sleeve.

[0053] The illustration in Fig. 1a shows a quarter turn lock 11 in a perspective side view, with which a door can be locked against a door frame. The structure and internal construction of the quarter turn lock 11 can be seen from the exploded view in Fig. 1b. The quarter turn lock 11 has a locking element 5 in the form of a quarter turn tongue which can be rotated back and forth about a rotation axis D between a locking position and an unlocking position and which, in the locking position, engages behind the frame of the door (not shown), so that the door is fixed relative to the door frame and cannot be opened. When the quarter turn tongue is rotated back into the unlocking position, the door can be moved relative to the frame and opened.

[0054] In order to rotate the locking element 5 accordingly, the cam lock 11 has a locking actuation 4, which essentially consists of a first actuation unit 2 and a second actuation unit 3, which are arranged one behind the other in the axial direction, wherein the first actuation unit 2 is arranged on the outside with respect to the lock housing 1 and the second actuation unit 3 is arranged on the inside.

[0055] The internal second actuating unit 3 extends through the base 1.2 of the breech housing 1 and is rotationally coupled at the end to the locking element 5, so that the locking element 5 can be rotated together with the two actuating units 2, 3 about the rotation axis D. A sealing ring 9 is provided between the second actuating element 3 and the base 1.2 of the breech housing 1, which seal prevents dirt and moisture from entering the interior of the breech housing 1.

[0056] To connect the locking element 5 to the locking actuator 4 or the second actuating unit 3, the latter has a profile contour 3.3 with a square profile at its end, onto which the locking element 5 can be slid in a rotationally fixed manner. The corresponding profile contour 3.3 as well as the correspondingly designed receptacle for the locking element 5 can be clearly seen in the illustrations in Figs. 1b and 1c. To secure the locking element 5 in the axial direction on the second actuating unit 3, the latter has a bore at its end into which a screw bolt 5.2 can be screwed. The locking element 5 is then firmly connected to the second actuating unit 3 or the locking actuator 4 as a whole via the screw bolt 5.2.

[0057] By connecting the end of the second actuating unit 3 extending through the circular recess 1.7 in the base 1.2 of the breech housing 1 to the locking element 5, an axial fixation of the locking actuation 4 in the breech housing 1 is achieved. This is because once the end of the second actuating unit 3 has been inserted through the recess 1.7 and provided with the locking element 5, it is no longer possible to pull the second actuating unit 3 out of the breech housing 1, since the locking element 5 does not fit through the base recess 1.7. In this respect, an axial fixation in the housing can be achieved by the locking element 5.

[0058] On the opposite side, the locking actuator 4 or the first actuating unit 2 has an actuating section 2.2, via which the locking actuator 4 and thus also the locking element 5 can be rotated back and forth about the rotation axis D by means of a suitable tool.

[0059] In order to transmit torque from the actuating section 2.2, which can be operated in particular manually, to the locking element 5, the two actuating units 2, 3 are rotationally coupled to one another. This means that a rotation of the actuating section 2.2 by a certain angle results in a rotation of the locking element 5 by the same angle.

[0060] For rotational coupling, the first actuating unit 2 has a bore 2.3 extending transversely to the axis of rotation D, and the second actuating unit 3 has a bore 3.4 designed as an elongated hole. As can be seen, for example, in relation to the illustration in Fig. 1b, a pin-shaped first securing element 6.1 is provided, the further functioning of which will be explained in more detail below, which extends through the bores 2.3, 3.4 of the two actuating units 2, 3. The first securing element 6.1 thus positively connects the two actuating units 3, 4 in the direction of rotation. The securing element 6.1 and the first actuating element 3 are both rotationally coupled and axially coupled with respect to the axis of rotation.

[0061] The breech housing 1 has a circumferential recess, the end regions of which each define a stop 1.5. This can be seen particularly in the illustration in Fig. 1. The stops 1.5 are arranged offset from one another in the circumferential direction by slightly more than 90 degrees, so that the stop lug 5.1 of the locking element 5, which projects in the axial direction towards the breech housing 1, comes into contact with one stop 1.5 in the locking position and with the other stop 1.5 in the unlocking position and can be rotated back and forth by 90 degrees. The corresponding stop lug 5.1 is shown in the illustration in Fig. 1b.

[0062] To mount the cam lock 11 on a door, it is first inserted through an opening in the door so that the collar 1.4, which is arranged at the end and projects radially on the circumference, rests on the surface of the door. In a next step, a nut 12 can then be screwed onto the thread 1.3 of the lock housing 1 from the other side of the door, so that the door is arranged between the collar 1.4 and the nut 12, and the lock housing 1 is thus fastened to the door. The other components of the cam lock 10 are then mounted or fastened to the lock housing 1 either directly or indirectly.

[0063] A special feature of the cam lock 11 is that it is designed as a safety cam lock, and therefore it is not easily possible to rotate the locking mechanism 4 from the locking position toward the unlocking position or from the unlocking position toward the locking position. Rather, the locking mechanism 4 and thus also the locking element 5 are secured in position both in the locking position and in the unlocking position by a reverse rotation lock 6, thus preventing unintentional movement, which can occur, for example, due to vibrations.

[0064] The anti-reverse lock 6 essentially consists of two elements, namely a first securing element 6.1, which, as described above, is designed as a pin according to the illustration in Fig. 1, and is assigned to the locking mechanism 4 or via which the locking mechanism 4 can be rotated, and a second securing element 6.2, which is arranged stationary relative to the first securing element 6.1. The second securing element 6.2 is designed as a slotted guide in which the first securing element 6.1 is guided.

[0065] Although the two actuating units 2, 3 of the locking actuation 4 are rotationally coupled to one another in the manner described above, the first actuating unit 2 is movable relative to the second actuating unit 3 in the axial direction, i.e., in the direction of the rotation axis D, between a release position and a locking position. A spring 9.1 is provided between the two actuating units 2, 3, which preloads the first actuating unit 2 axially outward into the locking position.

[0066] When the first actuating unit 2 is in the secured position, it is not possible to rotate the locking unit 4 about the rotation axis D. Thus, the locking element 5 is secured in this position in its respective locked or unlocked position. In order to then transfer the locking element 5 to the other position, the first actuating element 2 must first be moved from the secured position to the release position. To do this, the first actuating unit 2 must be moved axially relative to the second actuating unit 3 by a compressive force. Only in this depressed-in release position can the locking actuation 4 then be rotated about the rotation axis D.

[0067] Such axial relative movement is achieved through the elongated hole of the second actuating unit 3, which is axially secured in the bolt housing 1 and thus axially immovable. This is because when the first actuating element 2 is pressed axially inward against the force of the spring 9.1 and thus from the securing position into the release position, the first securing element 6.1 moves in the elongated hole toward the base 1.2 of the bolt housing 1 until it reaches the lower end of the elongated hole. The two ends of the elongated hole thus function as stops, and in the release position, when the locking actuation can be rotated about the rotation axis D, the first securing element 6.1 rests against the lower end of the elongated hole, and in the securing position, correspondingly against the upper end. The second actuating unit 3 has a round profile contour 3.3 at its outer end, opposite the angular profile contour 3.3.1, via which it is guided in a linearly movable manner in a cylindrical receptacle of the first actuating unit 2.

[0068] The first securing element 6.1 protrudes laterally on both sides relative to the actuating units 2, 3, so that this protruding part of the securing element 6.1 is designed as a projection. This protruding part then engages the second securing element 6.2, which, in the secured position, allows only axial but no rotational movement.

[0069] In order to prevent rotational movement of the locking actuation 4 in the securing position, the second securing element 6.2 is arranged on the inner side 1.1 of the lock housing 1 as shown in Fig. 1d. A total of four projections 6.3 are provided, which are evenly distributed around the circumference and extend from the inner side 1.1 in the direction of the rotation axis D. This can be seen in particular in the right-hand illustration in Fig. 1e. Between the projections 6.3 or between the circumferential ends of the projections 6.3, intermediate spaces 6.4 are arranged which, due to the regular arrangement in the circumferential direction, are offset from one another by 90 degrees.

[0070] In the locking position, the first locking element 6.1, or the laterally protruding ends of the first locking element 6.1, are now arranged in the gaps 6.4, reliably preventing rotation of the first locking element 6.1 and thus also of the locking mechanism 4. This is because the projections 6.3 block any corresponding rotation. When the ends of the first locking element 6.1 are thus arranged between the projections 6.3, the first locking element 6.1 is in the locking position and the locking element 5 is either in the locking position or in the unlocking position.

[0071] In order to rotate the locking actuation 4 and thus move the locking element 5 either from the unlocked position to the locked position or vice versa, the first securing element 6.1 must first be moved out of the gap 6.4 between the projections 6.3. To do this, the first actuating unit 2 can be pressed manually from behind, whereby the first actuating unit 2 together with the first securing element 6.1 is moved inwards, i.e. in the direction of the base 1.2 of the bolt housing 1, against the force of the spring 9.1 and relative to the second actuating unit 3 and the bolt housing 1. The first securing element 6.1 is then moved out of the area between the projections 6.3. As soon as the first securing element 6.1 has been moved out of the gap 6.4, it is in the release position.In this position, the locking mechanism 4 can then be rotated about the rotation axis D to lock or unlock the locking element 5. The securing element 6.1 moves behind the projections 6.3 or between the projections 6.3 and the base 1.2 of the bolt housing 1.

[0072] As soon as the first securing element 6.1 has been rotated far enough to move along the projection 6.3 to the other gap 6.4, it snaps into the next gap 6.4, driven by the spring 9.1. This is because the spring 9.1 presses the first actuating unit 2 and thus also the first securing element 6.1 outwards, thus locking it into the release position and upon rotation of the locking actuation 4 from below against the projections 6.3. Upon reaching a gap 6.4, the first securing element 6.1 snaps into the gap 6.4, driven by the spring 9.1, preventing further rotation of the locking actuation 4. In order to turn the locking actuation 4 further or backward, the outer actuation unit 2 must first be moved back into the lock housing 1 by a pressure force in the manner described above in order to ensure the rotational fixation by the adjacent projections 6.3 or 6.4.in the space 6.4. This results in a "push + turn" mechanism, which is also marked on the outside of the bolt housing 1.

[0073] From a structural point of view, the projections 6.3 have a strip-shaped geometry and extend from the inner side 1.1 of the bolt housing 1 in the direction of the rotation axis D and thus into the receiving space 1.6 of the bolt housing 1, in which the bolt actuation 4 is accommodated. The inner surfaces of the projections 6.3 pointing in the direction of the rotation axis D are designed as sliding surfaces 6.31, which together form a sliding bearing for the locking actuation 4. This is because the locking actuation 4 or the first actuation unit 2 is centered by the projections 6.3 or by the sliding surfaces 6.31 and slides on the sliding surfaces 6.31 during a rotational movement about the rotation axis D.

[0074] 2a to 2c show a cam lock 11 which functions essentially in the same way as the cam lock 11 shown in FIGS. 1a to 1e. However, the lock housing 1 is longer than the lock housing 1 shown in FIG. 1b, and the two actuating units 2, 3 are also somewhat longer in terms of their structural design. However, the second actuating unit 3 is again accommodated in the first actuating unit 2, and the two actuating units 2, 3 are rotationally coupled to one another via a pin-shaped first securing element 6.1, although they are axially movable relative to one another within certain limits. The first securing element 6.1 can extend completely through the two actuating units 2, 3, but it is also possible for it to protrude from the actuating units 2, 3 on only one side.This also applies to all other embodiments.

[0075] Furthermore, the projections 6.3 also differ somewhat from the previously described projections 6.3 in terms of their structural design. This is because the projection visible in the illustration in Fig. 2a has a significantly larger geometric extension in the axial direction and is therefore more block-shaped and less strip-shaped. Furthermore, in this exemplary embodiment, although four projections 6.3 and four intermediate spaces 6.4 are provided, unlike the design according to Fig. 1d, it is only possible to move the first securing element 6.1 from one recess 6.4 into a single other recess 6.4. This means that only two intermediate spaces 6.4 are connected to each other in pairs.

[0076] For this purpose, two of the four projections 6.3 are connected to one another via a connecting section 6.6, which can be seen, for example, in the illustration in Fig. 2a. This connection creates stop surfaces 6.32 to the left and right of the projections 6.3, which prevent any movement of the first securing element 6.1 in the circumferential direction beyond the gaps 6.4. This means that the locking actuation 4 can only be rotated until the first securing element 6.1 rests against one of the stop surfaces 6.32. In this position, the securing element can then be moved along the stop surface 6.32 in the axial direction from the release position into the securing position. As long as no continuous pressure is exerted on the first actuating unit 2, this embodiment also ensures that the first securing element 6.1 is automatically pushed into the gap 6 by the spring 9.1 upon reaching the stop surface 6.32 or the gap 6.4.4 engages and the locking actuation 4 is then prevented from rotating. As can be seen from the illustration in Fig. 2a, a U-shaped channel is arranged between the connecting section 6.6 and the projection 6.3, which channel functions as a link 6.5 and in which the first securing element 6.1 can be moved back and forth between the two intermediate spaces 6.4. Since the connecting section 6.6 protrudes from the inner surface 1.1 of the breech housing 1, a shoulder 6.51 is provided between the link 6.5 and the connecting section 6.6, which delimits the link 6.5 downwards, i.e. in the direction of the base 1.2 of the breech housing 1. Furthermore, the connecting section 6.6 is formed in one piece with the breech housing 1 and in the lower area it borders on the base 1.2 of the breech housing 1. Overall, the connecting section 6.6 is designed as a wall thickness reinforcement of the closure housing 1.

[0077] Since the first securing element 6.1 in this embodiment can only be moved between two adjacent spaces 6.4, and the interconnected projections 6.3 and the stop surfaces 6.32 ensure rotational limitation, it is not absolutely necessary for the closure housing 1 to have a rotational angle limitation in the form of stops, as is the case with the design according to Figs. 1a to 1e. Rather, the rotational angle limitation can be realized by the design of the second securing element 6.2 and the projections 6.3.

[0078] 3a to 5c differ from the embodiments according to Fig. 1a to 2c primarily in that the second securing element 6.2 is no longer part of the breech housing 1 or molded onto the breech housing 1, but the second securing element 6.2 is now part of a sleeve 7 that can be connected to the breech housing 1 in a rotationally fixed manner. In addition, the sleeve 7 can also simplify assembly overall, since the locking actuator 4 can first be mounted in the sleeve 7 before the actual assembly in the breech housing 1. After this pre-assembly, the locking actuator 4 can then be mounted as a whole in the breech housing 1 together with the sleeve 7 as an assembly unit 10. The corresponding assembly unit 10 can be seen, for example, in the illustration in Figs. 3b and 5b.

[0079] The design of the sleeve 7 will now be described first and foremost. For the design and function of the other components, reference is made to the above explanations. The cam lock 11 according to Fig. 3a to 3b has a one-piece sleeve 7. This sleeve 7 has a pot-shaped geometry overall and comprises a hollow cylindrical section 7.6 and a collar section 7.7 arranged at the outer end of the cylindrical section 7.6 and projecting circumferentially relative to the cylindrical section 7.6 in the radial direction. The sleeve 7 is designed overall such that, in the assembled state, it lies completely within the contour of the bolt housing 1. The outer surface of the cylindrical section 7.6 lies approximately flat against the inner side 1.1 of the bolt housing 1, or the cylindrical section 7.6 and the bolt housing 1 are arranged concentrically to one another.

[0080] The breech housing has a circumferential recess in the outer end region or in the region of the collar 1.4, which, measured from the outer surface of the breech housing 1, has the same geometric extent as the thickness of the collar section 7.7. This allows the outer surface of the collar section 7.7 to be flush with the outer surface of the breech housing 1 in the assembled state. In the embodiment according to Fig. 3c, the lettering "Push + Turn" is therefore also found on the outer surface of the collar section 7.7 and not on the breech housing 1 itself, as can be seen, for example, in the illustration in Fig. 1e.

[0081] To ensure that the sleeve 7 does not rotate when the locking mechanism 4 rotates, but is connected to the breech housing 1 in a rotationally fixed manner, the sleeve 7 has a plurality of lugs 7.71 projecting in the axial direction in the region of the collar section 7.7. These lugs 7.71 or projections extend a short distance along the outside of the cylinder section 7.6 and engage in correspondingly designed receptacles 1.8 in the breech housing 1, which are designed as recesses and which accordingly also extend in the axial direction and thus parallel to the axis of rotation D. As can be clearly seen from the illustration in Fig. 3c, a total of four corresponding lugs 7.71 and correspondingly also four receptacles 1.8 on the breech housing side are provided, which enable a positive rotational coupling of the sleeve 7 and the breech housing 1.

[0082] In order to prevent a rotational movement of the locking actuation 4 in the secured position, the second securing element 6.2 is arranged on the inside of the sleeve 7. The specific design of the securing element 6.2 can be seen in the right-hand illustration of Fig. 3c. Here, a total of four projections 6.3 are provided, which are evenly distributed around the circumference and extend from the cylinder section 7.6 in the direction of the rotation axis D. Between the projections 6.3 or between the ends of the projections 6.3, intermediate spaces 6.4 are arranged, which are offset from one another by 90 degrees due to the regular arrangement in the circumferential direction.

[0083] By comparing the representations in Fig. 3c and 1d, it is clear that the projections 6.3 are essentially identical in design, which also results in a correspondingly identical mode of operation. The only difference, however, is that the projections 6.3 are arranged on the inside of the sleeve 7 and not on the inside 1.1 of the breech housing 1. With regard to the projections

[0084] 6.3 referred to the above explanations.

[0085] The illustration in Fig. 4a to 4c shows a design with a two-part sleeve 7, wherein the design of the locking mechanism 4 corresponds to that of Fig. 3a to 3c. As in the design according to Fig. 4a to 4c, the second securing element 6.2 of the sleeve 7 has four projections 6.3 and spaces arranged between the projections 6.3.

[0086] 6.4.

[0087] As can be seen from the illustration in Fig. 4a, each of the two sleeve sections 7.1, 7.2 has two projections 6.3, so that this embodiment also has four projections 6.3 and correspondingly four intermediate spaces 6.4 into which the first securing element 6.1 can engage. Unlike the one-piece sleeve 7, the two-piece sleeve 7 shown does not have a collar section 7.7, but rather the two sleeve sections 7.1, 7.2 have a shell-shaped geometry, so that when combined they form a hollow cylinder, as already explained above with regard to the illustrations in Figs. 1 and 4.

[0088] In order that the two-part sleeve 7 is also arranged in the closure housing 1 in a rotationally fixed manner, each sleeve section 7.1, 7.2 has at least one lug 7.71 projecting in the axial direction, which can be clearly seen in the illustration in Fig. 4c. Each sleeve section 7.1, 7.2 has a lug 7.71 in the central region and half a lug 7.71 in each of the two end regions, so that in the assembled state a total of four lugs 7.71 are produced that are evenly distributed around the circumference, basically in the same way as in the embodiment according to Figs. 3a to 3c. In contrast to the arrangement of the lugs 7.71 on the collar section 7.7, the lugs 7.71 in the two-part sleeve 7 are arranged on the cylinder section 7.6, specifically at the lower end. Accordingly, the closure housing 1.8 also has correspondingly designed receptacles 1.8 in the area of ​​the base 1.2, into which the lugs 7.71 can engage in a form-fitting manner to prevent rotation of the sleeve 7 in the breech housing 1. These receptacles 1.8 can be clearly seen, in particular, in the right-hand illustration of Fig. 4b, which shows a perspective sectional view of the inside of the base 1.2 of the breech housing 1.

[0089] The illustrations in Figs. 5a to 5c show a further embodiment of the cam lock 11, which largely corresponds to the embodiment according to Figs. 4a to 1c. The main difference is that the sleeve 7 is designed as a four-part sleeve 7. This means that the sleeve sections 7.1, 7.2 according to the illustration in Fig. 5a are each subdivided again. Thus, each of the four sleeve sections 7.1, 7.2 has a circumferential angle of 90 degrees and accordingly each has a projection 6.3 and also a nose 7.71, as can be seen in particular in the illustration in Fig. 5c.

[0090] Overall, the cam lock 11 reliably prevents unintentional reverse rotation of the locking mechanism 4 and thus also of the locking element 5, both in the locked and unlocked positions. Furthermore, the sleeve 7 enables comparatively simple installation in the lock housing 1. Reference numerals:

[0091] 1 bolt housing

[0092] 1.1 Inside

[0093] 1.2 Soil

[0094] 1.3 Thread

[0095] 1 .4 Collar

[0096] 1.5 Stop

[0097] 1.6 Recording room

[0098] 1.7 Recess

[0099] 1.8 Recording

[0100] 2 first actuation unit

[0101] 2.2 Operating section

[0102] 2.3 Drilling

[0103] 3 second actuation unit

[0104] 3.1 Profile contour

[0105] 3.2 Collar

[0106] 3.3 Profile contour

[0107] 3.4 Drilling

[0108] 4 Locking operation

[0109] 5 Locking element

[0110] 5.1 Stop lug

[0111] 5.2 Screw bolts

[0112] 6 Reverse lock

[0113] 6.1 first securing element

[0114] 6.2 second securing element

[0115] 6.3 Advantage

[0116] 6.31 Sliding surface

[0117] 6.32 Stop surface

[0118] 6.4 Space 6.5 Backdrop

[0119] 6.51 Shoulder

[0120] 6.6 Connecting section

[0121] 7 Sleeve 7.1 Sleeve section

[0122] 7.2 Sleeve section

[0123] 7.6 Cylinder section

[0124] 7.7 Collar section

[0125] 7.71 Nose 9 Sealing ring

[0126] 9.1 Spring

[0127] 10 Assembly unit

[0128] 11 Cam lock

[0129] 12 Nut D Rotation axis

Claims

Patent claims:

1. A cam lock, in particular a safety cam lock, with a lock housing (1) and a locking actuator (4) which is rotatably mounted therein and which is connected to a locking element (5), in particular a locking tongue, and which, together with the locking element (5), can be rotated back and forth about a rotation axis (D) between a locking position and an unlocking position for locking and unlocking a door, with a reverse rotation lock (6) for securing the position of the locking actuator (4) in at least its locking position, wherein the reverse rotation lock (6) has a first securing element (6.1) and a second securing element (6.2), and wherein the two securing elements (6.1, 6.2) interact with one another to prevent unintentional rotation of the locking actuator (4), characterized in that the first securing element (6.1 ) is arranged so as to rotate with the locking actuation (4) and the second securing element (6.2) is arranged so as to be fixed against rotation with the locking housing (1 ), wherein the second securing element (6.2) is designed as a slotted guide.

2. Cam lock according to claim 1, characterized in that the first securing element (6.1) is movable between a release position, in which the locking actuation (4) can be rotated back and forth between the locking position and the unlocking position, and a securing position in which a rotational movement is prevented.

3. Cam lock according to one of claims 1 or 2, characterized in that the locking actuation (4) has a first and a second actuation unit (2, 3), wherein the two actuation units (2, 3) are rotationally coupled to one another via the first securing element (6.1).

4. Cam lock according to claim 3, characterized in that the two actuating units (2, 3) are arranged to be movable relative to one another in the axial direction.

5. Cam lock according to one of claims 3 or 4, characterized in that the second actuating unit (3) has a bore (3.4) designed as an elongated hole, in which the first securing element (6.1) is guided in a linearly movable manner.

6. A cam lock according to one of the preceding claims, characterized in that the second securing element (6.2) has at least two projections (6.3) extending in the radial direction and in particular in the form of strips, wherein the projections (6.3) are arranged at a distance from one another and an intermediate space (6.4) is arranged between the ends of each of the two projections (6.3).

7. Cam lock according to claim 6, characterized in that the first securing element (6.1) can engage in one intermediate space (6.4) in the unlocking position and in the other intermediate space (6.4) in the locking position.

8. Cam lock according to one of claims 6 or 7, characterized in that two mutually opposite projections (6.3) are connected to one another via a connecting section (6.6) to form a, in particular U-shaped, link (6.5).

9. Cam lock according to one of the preceding claims, characterized in that the second securing element (6.2) is formed integrally with the lock housing (1).

10. Cam lock according to one of the preceding claims, characterized in that the second securing element (6.2) is arranged on a sleeve (7) arranged in the lock housing (1) in a rotationally fixed manner.

11. Cam lock according to claim 10, characterized in that the sleeve (7) has at least one, in particular four, lugs (7.71) projecting in the axial direction, which can engage in the receptacles (1.8) on the lock housing side in order to connect the sleeve (7) to the lock housing (1) in a rotationally fixed manner.

12. Cam lock according to one of claims 10 or 11, characterized in that the sleeve (7) is designed as a one-piece sleeve (7).

13. A cam lock according to one of claims 10 to 12, characterized in that the sleeve (7) has a circumferentially closed cylinder section (7.6) and a collar section (7.7) projecting radially relative to the cylinder section (7.6).

14. Cam lock according to one of claims 10 or 11, characterized in that the sleeve (7) is designed as a two-part sleeve (7) and has two interconnectable sleeve sections (7.1, 7.2) which are designed as identical parts.

15. Cam lock according to one of claims 10 or 11, characterized in that the sleeve (7) is designed as a four-part sleeve (7) and consists of four interconnectable sleeve sections (7.1, 7.2) which are designed as identical parts.

Images