Turnbuckle lock

Abstract

The invention relates to a turnbuckle lock (11), in particular a safety 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; and 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 one securing element (6.1) is arranged to rotate with the locking actuator (4) and wherein the other securing element is arranged on a sleeve (7) that is mounted in the lock housing for conjoint rotation therewith.

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. It also has a reverse rotation lock for securing the position of the locking actuator in at least its locking position. The reverse rotation lock has a first securing element and a second securing element, and 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] 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 locking element corresponds to a pin on the housing side, guided in the guide slot. Upon reaching the locking position, the pin automatically moves into the end of the guide slot. This engages with the first locking element, preventing rotation of the locking mechanism and thus securing it in its position. To rotate the locking mechanism and move it from the locked position to the unlocked position, the guide slot or the locking mechanism must first be moved axially so that the pin is moved into the upper part of the guide slot and the locking mechanism can be rotated again.

[0004] 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 locking 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.

[0005] Based on this, the invention sets itself the task of specifying a cam lock, in particular a safety cam lock, which is characterized by simpler assembly.

[0006] This task is solved in a cam lock of the type mentioned at the beginning in that one securing element is arranged so as to rotate with the locking mechanism and the other securing element is arranged on a sleeve arranged in a rotationally fixed manner in the lock housing.

[0007] By arranging one of the locking elements on the sleeve, which is non-rotatably mounted in the bolt housing, the corresponding locking element is also non-rotatably connected to the bolt housing. When the two locking elements interact, rotation of the locking mechanism can thus be reliably prevented. Furthermore, by arranging one of the locking elements on the sleeve, it is possible for the two locking elements to interact with each other before assembly in the bolt housing, thus ensuring that the locking mechanism is already secured in position in the bolt housing. This significantly simplifies the overall assembly process.

[0008] With regard to the two securing elements, it has proven advantageous if the first securing element is arranged on the locking mechanism. By arranging the second securing element on the sleeve fixed to the bolt housing, the locking mechanism can also be fixed relative to the bolt housing when the two securing elements interact. This positional locking can thus prevent movement of the locking mechanism and thus also of the locking element. The locking mechanism can then be secured in the bolt housing in a rotationally fixed manner.

[0009] Furthermore, it has proven advantageous if the first securing element is designed as a projection. The projection can be formed integrally with the locking mechanism and can thus be rotated back and forth together with it about the rotation axis. The first securing element or projection can extend radially outward with respect to the rotation axis. Advantageously, two projections can be provided, which can be located on opposite sides of the locking mechanism with respect to the rotation axis. Overall, the locking mechanism can be designed axially symmetrically to the rotation axis. The two projections reduce the forces acting on each individual projection, thus improving the bearing security of the locking mechanism.

[0010] With regard to the second securing element, it has proven advantageous if it is designed as a slotted guide. The first securing element can therefore be guided in the second securing element or in the slotted guide. The slotted guide can be designed in such a way that it allows a relative movement of the first securing element in the slotted guide at least in sections and prevents at least a rotational movement in sections. By preventing a rotational movement, the locking actuation can be secured in position so that it cannot be moved unintentionally. Furthermore, the slotted guide also has a guiding function that ensures that a rotational movement cannot lead to the locking actuation.

[0011] It is advantageous if the locking mechanism is secured in position not only in the locking position, but also in the unlocking position. This prevents the locking mechanism from being inadvertently moved toward the unlocking position in the locking position, nor from being inadvertently moved toward the locking position in the unlocking position. The locking element can thus be secured against unintentional rotation in both end positions.

[0012] According to an advantageous development of the invention, it is proposed that the second securing element has a first securing contour to secure the locking mechanism in the locking position. Furthermore, the second securing element can also have a second securing contour to secure the locking mechanism in the unlocking position. Each securing contour can thus be assigned to one of the end positions, i.e., the locking position and the unlocking position. The first securing element can be reliably secured in position via the securing contours, so that a rotational movement of the locking mechanism can be reliably prevented.

[0013] With regard to locking, it has also proven advantageous if the first locking element can engage with one locking contour in the locking position and, in particular, with the other locking contour in the unlocking position. This locking action allows for automatic locking of the position upon reaching one of the two end positions, so that the locking mechanism can no longer be rotated after engaging. Manual intervention is therefore not required to secure the position.

[0014] Furthermore, it has proven advantageous if the first securing element is arranged to be movable in the axial direction relative to the second securing element between a securing position and a release position. The first securing element can be preloaded 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.

[0015] This design allows the two securing elements of the anti-reverse lock to automatically interact with one another to secure the locking mechanism when the first securing element has reached the or one of the securing contours of the second securing element. In particular, this design results in the first securing element automatically engaging with one of the two securing contours upon reaching it through a movement of the second securing element. The securing contour or the two securing contours can therefore be designed as securing contours. The first securing element can move in an axial direction. It is therefore only necessary to move or rotate the locking mechanism into the position to be secured, and the preload automatically ensures that any reverse rotation is prevented upon reaching the corresponding position.To retract or reverse the locking mechanism, the first securing element must first be moved axially back into the release position so that the two securing elements are disengaged. To achieve preloading of the two actuating units or the two securing elements, a spring, in particular a spiral compression spring, can be provided. The spring can preload the first securing element into the locking position and can be moved into the release position by a compressive force against the force of the spring. The axial direction refers to a movement in the direction of the rotation axis.

[0016] With regard to the securing contours, it has proven advantageous if these are designed as recesses extending in the axial direction. This design allows the first securing element to engage the securing contour(s) through an axial movement.

[0017] Furthermore, it has proven advantageous if the two securing contours are connected to each other via a guide. The two securing contours and the guide can thus together form the second securing element or the guide slot. The first securing element can move back and forth in the guide during a rotational movement between the locked and unlocked positions. The securing contours can represent the two end regions of the guide, so that rotation beyond the guide slot is not possible. The guide can extend in the circumferential direction. Overall, the guide slot can be U-shaped.

[0018] For locking and unlocking, the first securing element can be moved back and forth between the two securing contours via the guide when the locking actuation is rotated. When the first securing element is in the guide, it is arranged in the release position and can therefore be rotated back and forth in the guide between the two end positions. When the first securing element reaches one of the end positions, it can engage in the respective securing contour due to the pretension. The first securing element is then in the securing position. Since the two securing contours are assigned to the two end positions, the distance between the two securing contours in the circumferential direction also defines the angle of rotation of the locking actuation and the locking element rotationally coupled to it.Advantageously, the locking element can be moved back and forth by 90 degrees between the locking position and the unlocking position, so that the distance between the two locking contours in the circumferential direction can be substantially 90 degrees. The two locking contours can thus be arranged offset from each other by 90 degrees in the circumferential direction.

[0019] 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 the slotted guide, which can prevent movement of the first securing element in certain directions. From a design point of view, it has proven advantageous if the projection has a strip-shaped geometry. The projection can therefore extend mainly in the circumferential direction.This means that the geometric dimension in the circumferential direction can be greater than the geometric dimension in the axial direction. Furthermore, the projection can also have a block-shaped geometry. In this configuration, the geometric dimension in the circumferential direction and the geometric dimension in the axial direction can be approximately equal. Overall, the projection can be arranged such that it is located in the lower half of the receiving space of the bolt housing. This allows the actual locking of the locking mechanism to take place quite far inside the bolt housing, which also reduces the likelihood of dust or dirt entering this area.

[0020] 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.

[0021] 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 a gap is arranged between the ends of each of the two projections. Due to the circumferential arrangement, two gaps can thus also be provided. The gaps 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 adjacent projections. The gap(s) can be designed as securing contours, or the securing contours can be formed by the spaces between the ends of the projections.

[0022] 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, in particular if it can engage therein. If the first securing element is arranged in an intermediate space, a rotational movement of the locking element can be prevented by the projections. Thus, the unlocked position can be assigned to one intermediate space and the locking position of the locking element or 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.

[0023] 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.

[0024] 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.

[0025] Furthermore, it has proven advantageous if at least one projection has a stop surface for limiting a rotational movement of the locking actuation 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.

[0026] With regard to the locking actuation, it has proven advantageous if it has a first actuation unit and a second actuation unit. Furthermore, the first securing element can be part of the first actuation unit. The locking actuation can thus consist of two separate components. The two actuation units can be arranged one behind the other in the axial direction in the breech housing. The first actuation unit can be arranged further outwards in the breech housing than the second actuation unit. The second actuation unit can be secured in the axial direction in the breech housing via the first actuation unit. In terms of construction, the two actuation units can be cylindrical in shape and rotationally symmetrical to the axis of rotation.

[0027] 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.

[0028] The second actuating unit can be connected in a rotationally fixed manner to the locking element, in particular the locking tongue, particularly at the end opposite the profile contour. At this end, the second actuating unit can also 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.

[0029] To secure the locking element on or to the second actuating unit, the second actuating unit can have a threaded hole at the end into which a screw bolt can be screwed to axially secure the locking element. The locking element can therefore first be pushed onto the second actuating unit or the corresponding profile contour in an axial direction in a rotationally fixed manner and then secured to the profile contour in the axial direction via the screw bolt. In the locking position, the locking element can engage behind the door frame or engage in the frame so that the door cannot move relative to the frame in the locking position and therefore cannot be opened. If the locking element is actuated via the locking actuation orIf the two locking units are turned into the unlocking position, the lock is released and the door can be moved relative to the frame and opened.

[0030] In order to rotate the locking actuation, the first actuation unit can be rotated back and forth about the rotation axis from the outside, for example using a tool or directly by hand. The first actuation unit can have an actuation section for this purpose. The actuation section can be designed, for example, in the manner of a projecting square, so that a suitable tool can be used to rotate the locking actuation and thus also the locking element between the locking position and the unlocking position. Alternatively, actuation can also be provided using a different type of tool or a key. Actuation via a latch or a rotatable doorknob is also possible. Furthermore, it has proven advantageous if the first actuation unit is arranged so as to be movable in the axial direction relative to the second actuation unit.In this way, the first securing element can be moved back and forth between the release and the securing position. The rotary coupling of the two actuating units can be designed in such a way that torque can be transmitted via it, but axial relative movement is still possible. A spring can be provided between the two actuating units, which preloads the first actuating unit relative to the second actuating unit. The spring can ensure that the first actuating unit and thus also the first securing element can independently interact with the securing contour or engage with it upon reaching an end position. The spring can press the two actuating units apart and thus preload the first securing element outwards.

[0031] If the locking actuation is to be rotated from the locked position to the unlocked position, for example for unlocking, it is first necessary to move the first actuation unit in the axial direction relative to the second actuation unit. In doing so, the first actuation unit can be pressed into the lock housing in the axial direction using a compressive force. During this movement, the first securing element can move from the securing contour into the guide slot of the second securing element, so that a rotary movement of the locking actuation is then possible. If the first securing element is arranged in the guide of the second securing element, the first securing element or the first actuation unit cannot be moved in the axial direction. The compressive force therefore does not have to be maintained during rotation.

[0032] Furthermore, with regard to the two actuating units, 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. It can be provided that the first securing element extends through the bores of the two actuating units and thus connects them to one another. The bores of the two actuating units can be aligned with one another in order to enable a connection via the first securing element. 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 be arranged laterally, in particular on both sides, opposite the locking actuation orprotrude from the two actuating units, and this protruding area can function as a projection that can interact with the second securing element, as already described above. The projecting part of the first securing element can thus be designed as a projection. In this embodiment, the projection is not integrally connected to the locking actuation.

[0033] By designing the bore of the second actuating unit as an elongated hole, an axial relative movement of the two actuating units can be enabled. The pin or 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 on one end of the elongated hole, in particular the outer end, and in the release position, the first securing element can rest on 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.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.

[0034] Furthermore, it has proven advantageous to provide two first securing elements and two second securing elements, with each first securing element interacting with a second securing element. The two pairs of securing elements provide redundancy and thus reliable positional security for the locking mechanism. The securing elements can be designed as described above and in more detail below. Advantageously, the two first securing elements are located opposite one another with respect to the rotation axis. The second securing elements can also be arranged symmetrically to one another with respect to the rotation axis or on opposite sides of the rotation axis.

[0035] According to an advantageous development of the invention, it is proposed that the locking mechanism be rotatably mounted in the sleeve. The sleeve can thus function as a pivot bearing and ensure reliable rotational movement around the rotation axis.

[0036] With regard to the sleeve, it has also proven advantageous if the sleeve limits axial movement of the two actuating units. Both actuating units can be mounted in the sleeve, whereby the sleeve allows movement of the first actuating unit between the release and locking positions, but prevents any further axial movement. The second actuating unit can be arranged immovably relative to the bolt housing and thus also relative to the sleeve in the axial direction.

[0037] According to an advantageous development of the invention, it is proposed that the sleeve be designed 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 together with the locking actuator 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 mounting for the rotatable locking mechanism. This also ensures fixed and predetermined locking and unlocking positions and prevents slippage.

[0040] From a design point of view, it has also proven advantageous with regard to the sleeve if it has at least one, in particular four, lugs projecting in the axial direction. The lugs can engage in receptacles on the breech housing side in order to connect the sleeve to the breech housing in a rotationally fixed manner. The lugs and the receptacles can thus ensure a reliable, positive connection between the sleeve and the breech housing. The lug or lugs can extend in the axial direction, i.e. in the direction of the rotation or actuation axis. The receptacle or receptacles can be designed to correspond to the lug or lugs and thus also extend in the axial direction. The receptacle or receptacles can be designed as recesses.Four lugs and, correspondingly, four receptacles have proven advantageous in practice to ensure a reliable, positive connection and prevent relative movement. The sleeve can thus be secured against rotation relative to the breech housing. The lug(s) and the receptacle(s) can each be designed as anti-rotation elements. In this case, the lug represents an anti-rotation element on the sleeve side, and the exception represents an anti-rotation element on the breech housing side. Regarding the design of the anti-rotation elements, please also refer to the explanations below.

[0041] With regard to the arrangement of the lug(s), it has proven advantageous if they are located on the collar section of the sleeve. Movement of the sleeve as a whole can thus be reliably prevented via the collar section. The lugs can be evenly distributed circumferentially around the collar section. The recesses can thus be arranged at the outer end of the breech housing so that the lugs can engage in the respective recesses. Furthermore, it is also possible for the sleeve to be constructed in several parts.

[0042] According to a particularly advantageous development of the invention, it is proposed that the sleeve consists of two interconnectable sleeve sections. This two-part design has proven advantageous with regard to assembly and allows for 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 tube or cylinder jacket and can be divided longitudinally into two sleeve sections. To rotatably accommodate the locking actuation or the two actuation units, the two sleeve sections can be shell-shaped.Each sleeve section can have a second securing element. Thus, a first securing element can be guided in each of the two sleeve sections.

[0043] 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.

[0044] According to an advantageous embodiment, 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 breech housing, each sleeve section can be equipped with at least one lug to ensure reliable anti-rotation locking.

[0045] 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 lug to enable a reliable, positive connection with the bolt housing. Furthermore, it has proven advantageous if the second actuating unit is axially secured within the sleeve. The second actuating unit cannot move in the axial direction, but can only be rotated back and forth about the rotational axis.

[0046] To achieve axial locking, it has proven advantageous for the second actuating unit to have a radially projecting collar that is guided on a rotary guide of the sleeve. The collar and the rotary guide can enable reliable rotary movement, while simultaneously preventing relative axial movement between the sleeve and the first actuating unit. The rotary guide can be designed as a radially extending recess, e.g., in the manner of a groove, and the collar can be positively mounted in this recess. The collar can be axially secured in the lock housing via the collar.

[0047] To connect the two sleeve sections, it has proven advantageous if they can be connected to one another in a form-fitting manner, particularly via a tongue and groove connection. Each sleeve section can thus have a groove at one circumferential end and a tongue at the correspondingly opposite circumferential end. This complementary design allows the two sleeve sections to be assembled in a fixed, defined position. The tongue of one sleeve section can engage the groove of the other sleeve section. This design enables simple and even blind assembly.

[0048] According to an advantageous development, the two sleeve sections can be locked together. This design also further simplifies assembly, as there is no risk of the two sleeve sections accidentally separating when inserted into the bolt housing. The two sleeve sections can be locked together by plugging them together, so no additional tools are required for connection.

[0049] With regard to the arrangement of the sleeve in the bolt housing, it has proven advantageous if it is arranged in a rotationally fixed manner in the bolt housing via an anti-rotation device. This prevents the sleeve from rotating during a rotational movement of the locking mechanism. Instead, the sleeve can act as a fixed pivot bearing for the locking mechanism. To enable a rotationally fixed arrangement in the bolt housing, the sleeve and the bolt housing can be positively connected to one another. During assembly, the sleeve can be pushed axially into the bolt housing until it reaches its final position and rests against the base of the bolt housing. At the latest in its final position, the sleeve can then be secured against rotation.

[0050] With regard to the anti-rotation device, it has proven advantageous from a design perspective if it has an anti-rotation element on the breech housing side and an anti-rotation element on the sleeve side, whereby the two anti-rotation elements can interact with each other in a form-fitting manner to prevent rotation of the sleeve in the locking element. The two anti-rotation elements can thus fix the sleeve relative to the breech housing, so that it is arranged non-rotatably in the breech housing.

[0051] From a design perspective, it has proven advantageous if the anti-rotation element on the breech housing is designed as a projection. By designing it as a projection, rotational movement of the sleeve can be reliably prevented. The projection can protrude from the cylindrical inner surface of the breech housing, so that the inner surface, which is designed to be rotationally symmetrical to the axis of rotation, is not rotationally symmetrical in the region of the projection. Rather, the projection can result in a non-circular cross-section. The projection can therefore protrude with regard to the circular cross-section of the breech housing. Furthermore, the projection can be designed in the manner of a chord-shaped flattened area, so that the cross-section of the breech housing is correspondingly non-circular in the region of the flattened area.

[0052] With regard to the sleeve-side anti-rotation element, it has proven advantageous if it is designed as a recess. The recess can be formed by the cylindrical outer surface of the sleeve being cut off or flattened in certain areas. In this respect, the recess can also be designed as a flattened portion. The recess can be adapted to the projection of the breech housing, so that the recess and the projection can be designed to correspond to one another. In particular, the projection and the recess can interact like superimposed flat surfaces. This reliably prevents any rotational movement of the sleeve in the breech housing. The recess can be located in the connection area of ​​the two sleeve sections, so that each of the two sleeve sections can have part of the recess in its circumferential end region, or the two end regions can be flattened accordingly.Furthermore, it is advantageous if the bolt housing has not just one, but two projections. The two projections can be structurally identical and, like the recesses, can be opposite each other with regard to the axis of rotation. When the sleeve is pushed forward into the bolt housing during assembly, the projections and recesses or the flattened areas can come into contact with one another, thus preventing any rotational movement of the sleeve. In an alternative embodiment, it is also possible for the bolt housing to have a recess and the sleeve to have a projection. When the sleeve is assembled in the bolt housing, the projection can serve as a guide, so that the sleeve can only be mounted in one or, due to its rotationally symmetrical design, only in two predefined positions in the bolt housing.

[0053] Furthermore, it has proven advantageous if the projection(s) on the bolt housing side have a radially inwardly projecting thickening in the area of ​​the housing base. The thickening can be arranged in the lower end area of ​​the projection so that the projection can have an L-shape in its longitudinal cross-section. This thickening can enlarge the contact surface between the bolt housing and the sleeve which prevents rotational movement so that the sleeve does not slip, for example even under the action of greater force and a certain deformation, and yet rotates in the bolt housing. To accommodate this thickening, the sleeve or the two sleeve sections can have corresponding recesses in the lower area into which the thickening can engage with a form fit. The thickening can extend from below, i.e. in the axial direction, into the sleeve and thus prevent rotational movement.

[0054] Furthermore, it has proven advantageous if the second actuating unit extends through the base of the breech housing and is secured axially in the breech housing by the locking element. The collar of the second actuating unit thus holds the sleeve in the breech housing, and once the second actuating unit has been axially fixed, it can no longer be pulled out of it. Since the first actuating unit is guided in the sleeve by the first securing element, the first actuating unit cannot be pulled out of the breech housing either. The second actuating unit can extend through the base of the breech housing and be connected to the locking element at its end.The locking element allows the second actuating unit to be secured axially in the bolt housing, so that essentially the entire locking mechanism, including the sleeve, can be secured in the bolt housing via the locking element. An additional connection to the bolt housing is therefore not necessary.

[0055] 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 locking housing. This design simplifies assembly because the individual elements, i.e., the actuating units and the sleeve, can be assembled in the locking housing prior to the actual assembly and then inserted axially into the locking housing as a complete assembly unit. Axial fixation in the locking housing can then be achieved by mounting the locking element on the section of the second actuating unit that protrudes from the locking housing.

[0056] With regard to the locking housing, it has proven advantageous if it has a collar which 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 so that it represents 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. After the nut has been 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. Furthermore, the locking housing can have a base and a recess in the base through which the locking actuation, in particular the second actuation unit, can extend.The base can be designed to protrude radially inward, so that it provides an axial stop for the sleeve during assembly. Overall, the breech housing can have a cylindrical geometry, and the rotation axis can extend centrally through the breech housing. To prevent gas exchange, a sealing ring can also be provided, which can be arranged in the breech housing before the sleeve is assembled and the locking mechanism is actuated. The sealing ring can seal the second actuating unit from the breech housing.

[0057] 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 lug, the two stops can be offset from one another in the circumferential direction by slightly more than 90 degrees in order to ensure a rotational movement of 90 degrees. Furthermore, with regard to the object mentioned at the outset, a door with a cam lock is proposed, wherein the cam lock is designed in the manner described above. This results in the advantages already described with regard to the cam lock. The door can have a bore through which the cam lock can extend. The cam lock can thus be operated from the outside of the door and the locking element can be arranged on the inside of the door and engage in or behind a door frame to lock the door. The term door also includes flaps, covers, hatches, windows or the like.

[0058] Further details and advantages of the invention will be explained in more detail below with reference to a schematic embodiment shown in the accompanying drawings.

[0059] Fig. 1 shows a cam lock in a perspective exploded view;

[0060] Fig. 2 shows the cam lock according to Fig. 1, with some parts shown assembled;

[0061] Fig. 3 is a sectional view of the cam lock;

[0062] Fig. 4 is a perspective detailed view of a sleeve section;

[0063] Fig. 5 a perspective detailed view of a lock housing

[0064] Fig. 6a to c show various perspective views of a cam lock with a one-piece sleeve; Fig. 7a to c show various perspective views of a cam lock with a two-piece sleeve;

[0065] Fig. 8a to c various perspective views of a cam lock with a four-part sleeve.

[0066] The illustration in Fig. 1 shows an exploded view of a cam lock 11, with which a door can be locked relative to a door frame. The cam lock 11 has a locking element 5 in the form of a cam tongue that can be rotated back and forth about a rotation axis D between a locking position and an unlocking position. In the locking position, the cam tongue 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 cam tongue is rotated back to the unlocking position, the door can be moved relative to the frame and opened.

[0067] 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. The second actuation unit 3 extends through the base 1.2 of the lock housing 1 and is rotationally coupled to the locking element 5 at its end, so that the locking element 5 can be rotated together with the two actuation units 2, 3 about the rotation axis D. To connect the locking element 5 to the locking actuation 4 or the second actuation 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 pushed 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 Fig. 1 and Fig. 2.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 via the screw bolt 5.2.

[0068] 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.

[0069] In order to enable torque transmission between the two actuating units 2, 3 and thus also from the actuating section 2.2 to the locking element 5, these are rotationally coupled to one another via a profile contour 3.1 with a square profile arranged on the second actuating unit 3. The first actuating unit 2 has a correspondingly designed receptacle for receiving the profile contour 3.1, which can be seen, for example, in the sectional view of Fig. 3. The profile contour 3.1 is positively received in the receptacle so that torque can be transmitted and the two actuating units 2, 3 rotate in the same direction about the rotation axis D for locking and unlocking.

[0070] 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.

[0071] The reverse rotation lock 6 essentially consists of two elements, namely a first securing element 6.1, which is arranged on the first actuating unit 2, and a second securing element 6.2, which is arranged on a sleeve 7.

[0072] In the exemplary embodiment, the first securing element 6.1 is a projection integrally formed on the first actuating unit 2, which extends radially with respect to the rotational axis D and can be seen, for example, in the illustration in Fig. 1. The second securing element 6.2 is designed as a slotted guide in which the first securing element 6.1 is guided. The slotted guide can be seen particularly in the illustration in Fig. 4.

[0073] The sleeve 7 consists of two sleeve sections 7.1, 7.2, one of which is shown in the illustration in Fig. 4. The two sleeve sections 7.1, 7.2 are designed as identical parts, so that the statements for Fig. 4 apply accordingly to both sleeve sections 7.1, 7.2. The sleeve section 7.1 has an essentially U-shaped guide slot which consists of three sections, namely two securing contours 6.21, 6.22 extending in the axial direction and a guide 6.23 connecting the two securing contours 6.21, 6.22 and extending in the circumferential direction with regard to the axis of rotation D. When the first securing element 6.1 is located in the guide 6.23, the locking actuation 4 can be freely rotated back and forth about the axis of rotation D. The sleeve 7 is arranged in the lock housing 1 in a manner described in more detail below in a rotationally fixed manner so that it does not rotate.

[0074] The locking housing 1 is cylindrical in shape and has a thread 1.3 on its outside. A nut, for example, can be screwed onto this thread 1.3, which can be used to fix the locking housing 1 to a door.

[0075] The two securing contours 6.21, 6.22 are arranged in the end regions of the guide 6.23 and extend axially with respect to the rotation axis D. Each securing contour 6.21, 6.22 is assigned to one of the end positions, i.e., the locking position or the unlocking position. When the locking mechanism 4 or the first securing element 6.1 has reached the locking position, the securing element 6.1 is located in the region of one securing contour 6.21, and when the unlocking position is reached, it is located in the region of the other securing contour 6.22.

[0076] 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 securing position. The profile contour 3.1 and the corresponding receptacle of the first actuating unit 2 are designed to enable relative axial movement, as can also be seen from the illustration in Fig. 2. A spring 9.1 is provided between the two actuating units 2, 3, which preloads the first actuating unit 2 outward in the axial direction into the securing position. This has the result that the first securing element 6.1 is pushed upward in the slotted guide by the spring 9.1, as shown in Fig. 4. Consequently, the first securing element 6.1 is automatically moved into the locking position and thus into the locking contour 6.22, 6.23 upon reaching one of the two locking contours 6.22, 6.23, and reversing the locking actuation 4 is then no longer possible. Rather, the locking element 6.1 is locked in one of the locking contours 6.22, 6.23. In order to then reversing the locking element 4, the locking connection of the two locking elements 6.1, 6.2 must first be released, and the locking element 6.1 must first be moved axially back into the release position at the level of the guide 6.23. To do this, the first actuating unit 2 must be moved axially inwards, i.e. in the direction of the second actuating unit 3, against the force of the spring 9.1. Only when the first actuating unit 3 has been moved accordingly and the locking connection is thus released, can the locking actuation 4 be carried out via the actuating section 2.2 can be rotated again about the rotation axis D, thus also moving the locking element 5. To simplify things for the user, this mechanism is also indicated on the collar 1.4 of the lock housing 1 with push-and-turn, as can be seen, for example, in the illustration in Fig. 2 or Fig. 5. Therefore, a pressure force must first be applied before the locking mechanism 4 can be rotated back and forth between the locking position and the unlocking position.

[0077] Thus, the locking actuator 4 and thus also the locking element 5 are secured in position both in the locking position and in the unlocking position and even in the event of vibrations or shocks there is no risk of the elements moving in an unintentional manner.

[0078] The bolt housing 1 has a circumferential recess, the end regions of which each define a stop 1.5. 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 axially toward the bolt housing 1, rests against one stop 1.5 in the locked position and against the other stop 1.5 in the unlocked position, and can be rotated back and forth by 90 degrees. The position of the stops 1.5 is adapted to the position of the two securing contours 6.21, 6.22, so that it is ensured that the first securing element 6.1 is engaged in the securing contour 6.21, 6.22 to prevent the locking actuation 4 from rotating backwards when the locking element 5 rests against one of the stops 5.1.

[0079] The assembly of the cam lock 11 becomes clear by comparing Fig. 1 and Fig. 2. First, the spring 9.1 is arranged between the two actuating units 2, 3 before these are plugged together to form the locking actuator 4. In a next step, the two bowl-shaped sleeve sections 7.1, 7.2 are then placed around the locking actuator 4 and connected to each other, so that the locking actuator 4 is arranged in the cylindrical sleeve 7.

[0080] The sleeve 7 or the two sleeve sections 7.1, 7.2 have a rotary guide 7.3 in the lower area, which can be seen in the illustration in Fig. 4. This rotary guide 7.3 is designed, at least in sections, in the manner of a groove that extends in particular circumferentially. The second actuating unit 3 has a collar 3.2 that projects outwards in the radial direction and can be seen both in the illustration in Fig. 1 and in the sectional view according to Fig. 3. The second actuating unit 3 and the sleeve 7 or its rotary guide 7.3 are coupled to one another in the axial direction via this collar 3.2, so that they cannot move relative to one another in the axial direction.

[0081] Since the second actuating unit 3 extends through the base 1.2 of the bolt housing 1 and is secured in the axial direction by the screw bolt 5.2, the sleeve 7 is also correspondingly fixed in the axial direction. Since the second securing element 6.2 or the guide slot allows a certain axial relative movement of the first securing element 6.1 and the first actuating unit 2, but the first actuating unit 2 is nevertheless guided in the sleeve 7 by the second securing element 6.2, the first actuating unit 2 can no longer be pulled out of the bolt housing 1 after installation in the bolt housing 1.

[0082] The two sleeve sections 7.1, 7.2 are equipped with form-locking elements in their circumferential end regions so that the sleeve sections 7.1, 7.2 can be connected to one another in a form-locking manner to form the sleeve 7. Specifically, each sleeve section 7.1, 7.2 has a tongue 7.5 in one end region and a groove 7.4 in the other end region. When the sleeve sections 7.1, 7.2 are assembled, the tongues 7.5 engage in the respective grooves 7.4 so that the sleeve sections 7.1, 7.2 can be connected to one another. The locking actuation 4 is then secured in the sleeve 7 and the two actuation units 2, 3 can no longer be separated from one another in the axial direction. In the illustration in Fig. 2, this assembly unit 10, consisting of the sleeve 7 and the locking actuator 4 arranged therein, can be seen.

[0083] Once the elements have been assembled accordingly, they can be pushed together as an assembly unit 10 in the axial direction into the breech housing 1. To prevent gas exchange between the interior and the exterior, a sealing ring 9 is also provided, which is arranged between the breech housing 1 or the base 1.2 of the breech housing 1 and the second actuating unit 3 extending through the base 1.2. The position of the sealing ring 9 can also be seen in the sectional view in Fig. 3.

[0084] To prevent the sleeve 7 from rotating during a rotational movement of the locking mechanism 4, an anti-rotation device 8 is provided, which essentially consists of a locking housing-side anti-rotation element 8.1 and a sleeve-side anti-rotation element 8.2. These two anti-rotation elements 8.1, 8.2 can interact in a form-fitting manner after the assembly unit 10 or the sleeve 7 has been installed in the locking housing 1, so that the sleeve 7 is arranged non-rotatably in the locking housing 1.

[0085] The anti-rotation element 8.1 is designed as a projection, so that the breech housing 1 no longer has a round, free inner cross-section in the area of ​​the anti-rotation element 8.1. The sleeve-side anti-rotation element 8.2, on the other hand, is designed as a recess, which is formed by tangential material removal on the outside of the sleeve 7. The removed area thus forms a recess compared to the remaining circular sleeve cross-section. When the sleeve 7 is inserted into the breech housing 1, the two anti-rotation elements 8.1, 8.2 come into contact with one another and their respective flat surfaces rest against one another. The non-circular cross-sections prevent any rotational movement of the sleeve 7 in the breech housing 1.

[0086] Furthermore, the sleeve 7 has two corresponding anti-rotation elements 8.2 or two corresponding flattened portions on its outer side, which are opposite one another with respect to the rotation axis D. The anti-rotation elements 8.2 are arranged in the two opposite end regions of the sleeve sections 7.1, 7.2, as can be seen from the illustration in Fig. 4. Accordingly, the closure housing 1 also has two anti-rotation elements 8.2, which are also opposite one another with respect to the rotation axis D. The position is thus adapted to the position of the anti-rotation elements 8.1 of the sleeve 7.

[0087] Furthermore, the anti-rotation element 8.1 on the breech housing side or the two anti-rotation elements 8.1 have a thickened portion 8.11 in the area of ​​the base 1.2 of the breech housing 1, which can be seen in the illustration in Fig. 5. This thickened portion 8.11 engages from below into the sleeve 7 or into the axial recess 8.21 shown in the illustration in Fig. 4 and also ensures that the sleeve 7 is rotationally fixed in the breech housing 1. The sleeve 7 has two corresponding recesses 8.21 which are adapted to the geometry of the thickened portion 8, with parts of the recesses 8.21 being arranged in the respective end regions of the sleeve sections 7.1, 7.2, as can be seen in the illustration in Fig. 4. Slipping or undesired rotational movement of the sleeve 7, even under the action of greater force, is thus reliably prevented.

[0088] As can be seen, for example, from the illustration in Fig. 3, the cam lock does not have just one anti-rotation lock 6, but two anti-rotation locks 6 and, accordingly, two first and two second securing elements 6.1, 6.2. Each sleeve section 7.1, 7.2 has a second securing element 6.2 or a guide slot in which the associated first securing element 6.1 is guided. The respective first and second securing elements 6.1, 6.2 are located opposite one another with respect to the rotation axis D, so that the two first securing elements 6.1 are also guided in the same direction in the guide slot or in the second securing elements 6.2.

[0089] The illustrations in Figs. 6a to 6c show a cam lock 11 that differs slightly from the cam lock 11 shown in the figures described above. Therefore, the differences will be explained in more detail below, and with regard to the similarities, reference is made to the above explanations.

[0090] Firstly, the locking actuation 4 again consists of two actuation units 2, 3, namely a first and externally arranged first actuation unit 2 and an internal second actuation unit 3. In the embodiment according to Fig. 1, the two actuation units 2, 3 are rotationally coupled to one another via the square profile contour 3.1, and a corresponding rotational coupling is also provided in the embodiment according to Figs. 6a to 6c, so that the two actuation units 2, 3 can only be rotated together about the rotation axis D. However, no square profile contour 3.1 is provided for this, but rather the rotational coupling is achieved via the first securing element 6.1 designed as a pin. This is because this extends transversely through the two actuation units 2, 3 and thus connects them to one another in a form-fitting manner.

[0091] For this purpose, 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. The elongated hole achieves a certain relative movement of the first actuating unit 2 with respect to the second actuating unit 3 in the axial direction. This is because when the first actuating element 2 is pressed inwards in the axial direction 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 towards the base 1.2 of the lock housing 1 until the latter has reached 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 axis of rotation D, the first securing element 6.1 rests against the lower end of the elongated hole, and in the securing position, accordingly, against the upper end.

[0092] The first securing element 6.1 protrudes 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, basically in the same way as the securing element 6.1 connected in one piece with the first actuating unit 2 as shown in Fig. 1. Since the first securing element 6.1 not only rotationally couples the two actuating units 2, 3 to one another, but also prevents the two actuating elements 2, 3 from being separated from one another in the axial direction, it is not necessary in the design according to the illustration in Figs. 6a to 6c for the sleeve 7 to hold the two actuating units 2, 3 together in the axial direction or to prevent axial separation.

[0093] In this respect, the assembly of the one-piece sleeve 7 may be easier than the assembly of the multi-piece sleeve. The one-piece sleeve 7 can be seen not only in the illustration in Fig. 6a but also in the right-hand illustration in Fig. 6c. The sleeve 7 has a cup-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 breech housing 1. The outer surface of the cylindrical section 7.6 lies approximately flat against the inner side 1.1 of the breech housing 1, or the cylindrical section 7.6 and the breech housing 1 are arranged concentrically to one another.

[0094] 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. 6a, 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 in the illustration in Fig. 5.

[0095] To ensure that the sleeve 7 does not rotate when the locking mechanism 4 rotates, but is connected to the bolt housing 1 in a rotationally fixed manner, the sleeve 7 has a plurality of axially projecting lugs 7.71 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 of the bolt housing 1, which are designed as recesses and which accordingly also extend in the axial direction and thus parallel to the rotation axis D.

[0096] As can be clearly seen from the illustration in Fig. 6c, a total of four corresponding lugs 7.71 and correspondingly four receivers 1.8 on the breech housing side are provided, which enable a positive rotational coupling of sleeve 7 and breech housing 1. In this respect, the lugs 7.71 and the receivers 1.8 each function as anti-rotation elements 8.1, 8.2, as has already been explained in particular with regard to the illustrations in Figs. 4 and 5.

[0097] 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. 6c. 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.

[0098] In the securing position, the first securing element 6.1 or the laterally projecting ends of the first securing element 6.1 are arranged in the spaces 6.4, so that a rotational movement of the first securing element 6.1 and thus also of the locking actuation 4 is reliably prevented. In order to move the locking actuation 4 and thus to move the locking element 5 optionally from the unlocking position to the locking position or vice versa, the first securing element 6.1 must first be moved out of the space 6.4 between the projections 6.3. For this purpose, the first actuation unit 2 can be pressed manually from behind, whereby the first actuation unit 2 together with the first securing element

[0099] 6.1 is moved inward, i.e., toward the bottom 1.2 of the bolt housing 1. In the process, the first locking element 6.1 is also moved out of the area between the projections 6.3. In the release position, the locking mechanism 4 is rotatable about the rotation axis D, and the first locking element 6.1 can be moved behind the projections 6.3 or between the projections 6.3 and the bottom 1.2 of the bolt housing 1.

[0100] However, the spring 9.1 causes the first locking element 6.1 to snap into the next gap 6.4 upon reaching it. This is because the spring 9.1 pushes the first actuating unit 2 and thus also the first locking element 6.1 outwards and thus into the release position from below against the projections 6.3. Upon reaching a gap 6.4, the first locking element 6.1 snaps into place, driven by the spring.

[0101] 9.1 into the intermediate space 6.4, preventing further rotation of the locking mechanism 4. In order to rotate the locking mechanism 4 further or backward, the outer actuating unit 2 must first be moved back into the lock housing 1 by a pressure force, as described above, in order to release the rotational fixation by the adjacent projections 6.3 or in the intermediate space 6.4.

[0102] The projections 6.3 have a strip-shaped geometry and extend from the wall of the sleeve 7 in the direction of the rotation axis D and thus into the receiving space 1.6 of the lock housing 1. 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. 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.

[0103] The illustration in Figs. 7a to 7c shows a design with a two-part sleeve 7, wherein the design of the locking actuation 4 corresponds to that of Figs. 6a to 6c. Accordingly, with this two-part sleeve 7, there is no need for the sleeve 7 to hold the two actuation units 3, 4 together in the axial direction; instead, this task is accomplished via the pin-shaped first securing element 6.1. As with the design according to Figs. 6a to 6c, the second securing element 6.2 of the sleeve 7 has a plurality of securing contours 6.21, 6.22, which are formed by the projections 6.3 or the spaces 6.4 arranged between the projections 6.3.

[0104] As can be seen from the illustration in Fig. 7a, 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.

[0105] To ensure 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. 7c. Each sleeve section 7.1, 7.2 has a lug 7.71 in the central region and a half 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 the same as in the embodiment according to Figs. 6a to 6c.

[0106] In contrast to the arrangement of the lugs 7.71 on the collar section 7.7, the lugs 7.71 on the two-part sleeve 7 are arranged on the cylinder section 7.6, specifically at the lower end. Accordingly, the breech housing 1.8 also has correspondingly formed 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 are particularly clearly visible in the right-hand illustration of Fig. 7b, which shows a perspective sectional view of the inside of the base 1.2 of the breech housing 1.

[0107] The illustrations in Figs. 8a to 8c show a further embodiment of the cam lock 11, which largely corresponds to the embodiment according to Figs. 7a to 7c. 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. 7a 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. 8c.

[0108] Before assembly in the bolt housing 1, the two actuating units 2, 3 are connected to one another via the first securing element 6.1, and then the four sleeve sections 7.1, 7.2 are mounted from the outside so that the protruding ends of the first securing element 6.1 are arranged in the guide 6.23 of the second, sleeve-side securing element 6.2. This assembly unit 10 can then be mounted as a whole in the bolt housing 1, with the lugs 7.71 of the sleeve 7 engaging the receptacles 1.8 of the bolt housing 1. The lower end of the second locking actuation 4 extends through the base-side recess 1 in the assembled state.7 of the breech housing 1 and is then connected at the end to the locking element 5, so that the latter is directly rotationally coupled to the locking actuator 4, and a rotational movement of the locking actuator 4 through a certain angle directly leads to a corresponding rotational movement of the locking element 5 through the same angle. An axial movement of the locking actuator 4, or a withdrawal of the assembly unit 10 from the breech housing 1, is then prevented by the locking element 5, since it does not fit through the recess 1.7 of the breech housing 1.

[0109] 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.

[0110] Reference symbol:

[0111] 1 bolt housing

[0112] 1.1 Inside

[0113] 1.2 Soil

[0114] 1.3 Thread

[0115] 1 .4 Collar

[0116] 1.5 Stop

[0117] 1.6 Recording room

[0118] 1.7 Recess

[0119] 1.8 Recording

[0120] 2 first actuation unit

[0121] 2.1 Recording

[0122] 2.2 Operating section

[0123] 2.3 Drilling

[0124] 3 second actuation unit

[0125] 3.1 Profile contour

[0126] 3.2 Collar

[0127] 3.3 Profile contour

[0128] 3.4 Drilling

[0129] 4 Locking operation

[0130] 5 Locking element

[0131] 5.1 Stop lug

[0132] 5.2 Screw bolts

[0133] 6 Reverse lock

[0134] 6.1 first securing element

[0135] 6.2 second securing element

[0136] 6.21 first securing contour

[0137] 6.22 second securing contour

[0138] 6.23 Leadership

[0139] 6.3 Projection 6.31 Sliding surface

[0140] 6.4 Space

[0141] 7 sleeve

[0142] 7.1 Sleeve section

[0143] 7.2 Sleeve section

[0144] 7.3 Rotary guide

[0145] 7.4 Groove

[0146] 7.5 Spring

[0147] 7.6 Cylinder section

[0148] 7.7 Collar section

[0149] 7.71 Nose

[0150] 8 Anti-twist device

[0151] 8.1 Anti-rotation element

[0152] 8.11 Thickening

[0153] 8.2 Anti-rotation element

[0154] 8.21 Recess

[0155] 9 Sealing ring

[0156] 9.1 Spring

[0157] 10 Assembly unit

[0158] 11 Cam lock

[0159] D axis of rotation

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 a securing element (6.1 ) is arranged so as to rotate on the locking mechanism (4) and the other securing element (6.2) is arranged on a sleeve (7) which is arranged in the lock housing in a rotationally fixed manner.

2. Cam lock according to claim 1, characterized in that the first securing element (6.1) is designed as a projection.

3. Cam lock according to one of the preceding claims, characterized in that the second securing element (6.2) is designed as a slotted guide.

4. Cam lock according to one of the preceding claims, characterized in that the second securing element (6.2) has a first securing contour (6.21) for securing the locking actuation (4) in the locking position and a second securing contour (6.22) for securing the Locking actuator (4) in the unlocking position has a second securing contour (6.22), wherein the first securing element (6.1) can engage in one securing contour (6.21) in the locking position and in the other securing contour (6.22) in the unlocking position.

5. Cam lock according to one of the preceding claims, characterized in that the two securing contours (6.21, 6.22) are connected to one another via a guide (6.23), wherein the first securing element (6.1) can be moved back and forth between the two securing contours (6.21, 6.22) via the guide (6.23) upon rotation of the locking actuator (4).

6. Cam lock according to one of the preceding claims, characterized in that the second securing element (6.2) has at least one projection (6.3) extending in the radial direction.

7. Cam lock according to claim 6, characterized in that the projection (6.3) has a strip-shaped geometry.

8. Cam lock according to one of claims 6 or 7, characterized in that the projection (6.3) has an inner surface designed as a sliding surface (6.31) on which the locking actuation (4) is guided.

9. A cam lock according to one of claims 6 to 8, characterized in that the second securing element (6.2) has at least two projections (6.3), 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).

10. Cam lock according to claim 9, 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. 11 . Cam lock according to one of claims 6 to 10, characterized in that the first securing element (6.1) can engage behind the projection (6.4) in the release position.

12. Cam lock according to one of the preceding claims, characterized in that the second securing element (6.2) has four projections (6.3), wherein the projections (6.3) are arranged at a distance from one another and a space (6.4) is arranged between the ends of the projections (6.3) 13. A cam lock according to one of the preceding claims, characterized in that the first securing element (6.1) is arranged to be movable in the axial direction relative to the second securing element (6.2) between a securing position and a release position, wherein the securing element (6.1) is prestressed in the direction of the securing position, wherein the two securing elements (6.1, 6.2) cooperate with one another to prevent unintentional rotation of the locking actuation (4) in the securing position and wherein the locking actuation (4) is rotatable about the rotation axis (D) in the release position.

14. Cam lock according to one of the preceding claims, characterized in that the locking actuator (4) has a first actuating unit (2) and a second actuating unit (3), wherein the first securing element (6.1) is part of the first actuating unit (2).

15. Cam lock according to claim 14, characterized in that the first actuating unit (2) is rotationally coupled to the second actuating unit (3), wherein the first actuating unit (2) is arranged to be movable in the axial direction relative to the second actuating unit (3).

16. Cam lock according to one of the preceding claims, characterized in that the locking mechanism (4) is rotatably mounted in the sleeve (7).

17. A cam lock according to one of the preceding claims, 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 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.

18. Cam lock according to one of the preceding claims, characterized in that the sleeve (7) is designed as a one-piece sleeve (7).

19. A cam lock according to one of the preceding claims, 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).

20. Cam lock according to claim 19, characterized in that the collar section (7.7) can be connected in a form-fitting manner to the lock housing (1). 21 . Cam lock according to one of claims 17 to 20, characterized in that the nose (7.1), in particular the noses (7.1), are arranged on the collar section (7.7).

22. Cam lock according to one of the claims, characterized in that the sleeve (7) consists of two sleeve sections (7.1, 7.2) which can be connected to one another, wherein the two sleeve sections (7.1, 7.2) are designed as identical parts.

23. Cam lock according to claim 22, characterized in that the two sleeve sections (7.1, 7.2) can be connected to one another, in particular locked to one another, in particular via a tongue and groove connection.

24. Cam lock according to one of the preceding claims, 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 in particular as identical parts.

25. Cam lock according to one of the preceding claims, characterized in that the sleeve (7) is arranged in the lock housing (1) in a rotationally fixed manner via an anti-twist device (8).

26. Cam lock according to claim 25, characterized in that the anti-rotation device (8) has a housing-side anti-rotation element (8.1) and a sleeve-side anti-rotation element (8.2), wherein the two anti-rotation elements (8.1, 8.2) can interact with one another in a form-fitting manner to prevent rotation of the sleeve (7) in the locking element (1).

27. Cam lock according to one of claims 14 to 26, characterized in that the second actuating element (3) extends through the bottom (1 .2) of the closure housing (1 ) and is secured in the axial direction in the closure housing (1 ) via the locking element (5), wherein the sleeve (7) is connected to the second actuating unit (3) is secured in the axial direction in the lock housing (1).

28. Cam lock according to one of claims 14 to 27, characterized in that the two actuating units (2, 3) and the sleeve (7) form a pre-assembled assembly unit (10) which is Lock housing (1 ) can be mounted.

Images