MOUNTING ARRANGEMENT FOR BUILDING SERVICES MODULES

Description

[0001] The present invention relates to what is claimed in the generic term and thus relates to how building technology modules can be better arranged for users.

[0002] In building services, a range of modules are used to enable a user to, for example, switch on or dim lights, electrically control roller shutters, adjust air conditioning and heating systems, establish a communication link with people at a door station, but also to record and, if necessary, display current room data such as temperature, humidity, etc., to install motion sensors, sound sensors and / or smoke detectors, as well as other security technology sensors in rooms occupied by users, etc.

[0003] From DE 2029040058371 a switch housing for surface mounting and for accommodating an electronic module is known, comprising at least one module housing on which at least one rocker switch can be mounted and which has at least one intermediate frame which can be connected to at least one base plate, wherein the elements must be connected to one another in a specific order.

[0004] EP 0801830B1 discloses a mounting frame for attaching to a front opening of a cable duct. The frame is said to have a square shape and be formed on each side with a snap-in arrangement in the form of a guide and spacing device and at least one hook for engaging with flanges on the cable duct. Mounting in two positions separated by 90° is said to be possible.

[0005] EP 2107765A1 discloses a home station for a home communication system, comprising a device housing and audio components with a microphone and a loudspeaker. The microphone is to be connected to a circuit board via electrical connections formed by spring-loaded contact elements that rest electrically on the contact surfaces of the circuit board. The device has a latchable cover.

[0006] On the one hand, such modules should be inexpensive, which also means that their installation should be inexpensive. At the same time, however, such modules should also meet high aesthetic standards, which is usually only the case if an aesthetically pleasing installation is possible and which, moreover, often requires a precisely horizontal or vertical alignment. Some of the modules mentioned are mounted on the wall and powered from the wall. This requires preventing the modules from being easily removed from the wall, as otherwise, children who remove the modules from the wall unsupervised could be exposed to electric shocks.

[0007] It is common practice to arrange several modules, or even individual modules, in a cover frame that surrounds the edge of the modules. This frame can be designed so that the user modules cannot be easily removed. However, the use of a cover frame is often undesirable for architectural reasons and also increases costs.

[0008] It is desirable to provide a building services user module arrangement that is easy to install and at the same time safe.

[0009] The object of the present invention is to provide something new for industrial application. Preferred embodiments are found in the subclaims.

[0010] According to a first basic idea, a building services user module arrangement according to claim 1 is thus provided.

[0011] This initially enables the securing or fastening of the building services user modules without a frame or the like. The arrangement can thus be made more aesthetically pleasing without compromising safety. Since the through openings lead to the securing arrangement, disengagement can be achieved using a simple suitable tool such as a screwdriver or the like. To achieve this, only small forces generally need to be applied. It is possible and advantageous if the securing arrangement is formed on the mounting plate side with a tab protruding from the wall, in which an opening, preferably a through hole, is provided, and if an attachment is arranged on the module edge, which in the event of securing is guided at least into, preferably through the opening and is designed to be movable away from the opening for withdrawal.

[0012] A hook, particularly one-piece with the module edge, can engage the tab. In such a case, the securing action is achieved by the hook provided on the module frame engaging the tab. It should be noted, however, that such a hook arrangement does not necessarily have to be formed integrally with or from the same material as the module frame, typically plastic.

[0013] Alternatively and / or additionally, it is also possible and advantageous if, in the building services user module arrangement, the projection on the module edge is a locking hook which penetrates into the through-hole and which can be pressed out of engagement in the direction of the mounting plate center for removal using a tool which can be guided through the through-hole.

[0014] In principle, it would be possible to make the attachment to the module frame removable, for example by pushing a pin through the through-opening and then into or through the tab, or by screwing a screw through the through-hole, or the like. However, locking the module to the mounting plate is particularly preferred. For this purpose, it is possible and advantageous for the mounting plate to have locking hooks to prevent it from being pulled off. These locking hooks protrude from the wall and have locking hook engagement ends on the side facing away from the mounting plate center, and for the building services user module to have an edge which has a locking hook engagement end abutment towards the mounting plate center and which is provided with a through-opening leading to the locking hook.

[0015] This also enables the securing or fastening of the building services user module to a mounting plate without a cover frame or the like. The assembly can thus be designed in a more aesthetically pleasing manner without compromising security. Since the through-openings lead to the locking hooks or to the tabs or other elements of a securing assembly, locking hooks or tab-penetrating securing devices can be easily moved away from their locking hook engagement end abutments or out of the tab openings using a suitable tool such as a screwdriver or a thin pin. Only minimal forces are required for this purpose, because the securing assembly does not have to be used simultaneously to ensure the installation of the user module.

[0016] The arrangement according to the invention is suitable for a variety of modules, for example, for modules that serve exclusively as sensors, such as temperature sensors, ultrasound-based sensors, motion sensors that react to noise, brightness, etc., smoke detectors, etc., or that integrate such functionalities together with other functionalities; the user modules can also be switching devices such as multiple switching devices, controllers for light brightness or light temperature, for example, just as wired or wireless remote controls for audio-video systems, roller shutters and blinds, etc. can be implemented. The building services user modules can additionally and / or exclusively have display functionalities or can be used to display video images, recorded or desired temperatures, humidity, ventilation or heating settings, etc.It is also possible, for example, for the building services user module to serve as an intercom to connect to a door communication system. It should also be mentioned that the modules can also provide internet access, for example, to serve as a voice assistant. The mounting plate can be screwed directly to a wall if necessary, which is advantageous where hollow walls are made of plasterboard or similar materials, where the user modules are to be embedded in closet walls, or similar. Typically, however, a bracket is first firmly anchored to the wall, which in turn is intended for attaching the mounting plate.

[0017] The inventive arrangement of the mounting plate on a holder, which is itself firmly anchored, allows for particularly easy alignment of the mounting plate, especially horizontally, so that with square or rectangular modules, horizontal or vertical alignment of the module edges is particularly simple. This is particularly helpful where large-area modules such as displays are to be mounted.

[0018] The mounting plate will typically have a central opening, i.e., be formed as a frame plate. A particularly good securing effect, e.g., locking and holding effect, can be achieved inexpensively by forming the required elements from sheet metal, particularly in one piece. Those skilled in the art will recognize that, using conventional punching, embossing, and forming tools, it is readily possible to form the mounting plate in one piece from sheet metal, which allows for excellent securing, holding, and / or locking forces. Such metal parts, especially one-piece ones, are not only inexpensive to manufacture but also easy to process and assemble, for example, without risk of breakage, and are therefore generally preferred.

[0019] Typically, the modules are connected to cables routed in the wall, for example, lighting and / or data cables. For this reason, a recess is typically provided in the wall. The mounting plate, formed as a frame plate, is mounted in front of this recess, preferably on a holder firmly anchored in the recess. The module's rear end is then pushed through the opening provided in the frame plate. Such a module preferably provides connections for corresponding cables routed in the wall on the rear side.

[0020] The building services user module, which will be attached, can be held either against the mounting plate itself or against the wall. As a rule and preferably, the securing engagement is made close to the outer edge of the mounting plate, i.e. the locking hooks, tabs for engagement or the like are arranged in the area facing away from the center of the mounting plate. Where the mounting plate has an opening, the clear width of this opening can be based on standard specifications, such as typical sizes of brackets firmly anchored in a wall. The width of the frame surrounding the opening, on the other hand, is determined by the size of the modules. However, an area wide enough is generally left on top of it for the module to rest on it with a circumferential sealing ring, even if screws are still threaded through oblong holes in the frame area to ensure horizontal adjustment.In the same way, the mounting plate can be sealed against the holder or the wall. This allows for excellent sealing against moisture, dust and the like, which can also be achieved in a completely unobtrusive manner. An explosion-proof construction is possible, but it should be emphasized that the provision of seals is not mandatory. In a particularly preferred variant, the locking hooks, securing tabs or the like, as already mentioned, serve exclusively to prevent the module from being pulled away from the wall, but not to pull the user module towards the wall or the mounting plate. This is advantageous where the securing arrangement comprises locking hooks that can be unlocked or removed particularly easily using a suitable tool.should be able to be unlocked or released, but nevertheless a particularly high contact force should be achieved, for example because a sealing ring has to be pressed sufficiently hard, the overall arrangement is exposed to considerable vibrations, which can be the case in a strongly vibrating environment, for example when the building services user module arrangement is arranged in elevators, but also when the overall arrangement is used in trains and the like, in which conventional, non-dedicated building services user module arrangements can also be used advantageously.

[0021] One structural possibility according to the invention for separating the securing, e.g. by locking, from the application of the forces to be applied to the module for attachment, consists in locking the user module at its end facing the user against withdrawal or securing it in some other way, while the end facing away from the user, which is typically pushed through the opening of a frame-shaped mounting plate into a wall recess, has an engagement point at which a force is exerted on the building services user module by the mounting plate, forcing it into contact with the wall or the mounting plate.

[0022] In principle, there are various ways in which forces can be exerted from the mounting plate onto the building services module, forcing the module against the wall or the plate. For example, a magnet could be provided on the mounting plate or the holder to which it is attached, and a corresponding counter-magnet on the plug-in end of the building services user module. According to the invention, the mounting plate has at least one spring arm that points away from the user and is dimensioned and arranged such that the building services user module slides past its free end while deflecting the spring arm before the securing arrangement engages, e.g.the locking hooks engage with their abutments, whereby there is a recess on the back of the building services user module and the spring arm is bent at its free end to form a sliding surface such that the edge of the recess facing the user rests on the sliding surface, whereby the spring force of the arms is so great that the building services user module is not pulled into secure engagement without additional force pressing it against the mounting plate, i.e. is pulled past the locking hooks, but can still be pulled off the mounting plate, in particular without tools. At the same time, the spring force should be sufficient to secure the module that is not yet locked or in secure engagement against unwanted movement out. This arrangement has several advantages.Because initially only the spring arms engage with the building services user module, i.e. the locking hooks do not yet reach behind the abutments or the securing arrangement engages in another way, for example by a hook, projection or similar provided on the edge of the module engaging through tabs on the mounting plate, the user module can still be pulled out at any time. This is advantageous in that it allows the mounting plate, for example, to be aligned horizontally with particular precision. Because the locking hooks or similar only respond shortly before the building services module comes into contact with the mounting plate or the wall, alignment is easily possible by repeatedly pulling it out, readjusting the mounting plate, etc., without the need for a tool to unlock the user module or release the securing engagement each time.

[0023] In a particularly preferred variant, several spring arms are provided, which can extend in particular along the insertion axis and can be arranged at diametrically opposite locations. Several spring arms arranged diametrically opposite one another ensure that the module cannot be tilted forward in one direction. A sufficiently large spring arm width ensures that the inserted module will not tilt towards the horizontal when the mounting plate is correctly aligned, because otherwise a reverse torque would be exerted by the sliding surface on the edge of the recess facing the user. Wide spring arms therefore contribute to reproducible alignment relative to the mounting plate. In principle, it would also be possible to arrange several spring arms next to one another. However, the force exerted by the spring arms on the module will be greater if the spring arms are sufficiently wide.It should also be emphasized in this regard that the holding forces can be determined not only by the width of the spring arms, but also by their length, thickness, etc.

[0024] It is advantageous that, if locking hooks are provided for securing purposes, they are arranged as far apart as possible on an edge of the mounting frame. This allows an additional guarantee of precise alignment relative to the mounting plate despite narrow locking hooks. Relatively narrow locking hooks are advantageous because they significantly reduce the force that must be exerted on the locking hooks with a tool guided through the opening in order to unlock locked building services user modules. Narrow locking hooks can be used because the locking hooks only serve as such, namely to lock the modules to the mounting plates, whereas the force required to tighten them against the mounting plate or the wall, with which the building services user module is held in place, can be applied differently. The same applies, for example, tothe use of tabs on the mounting plate; where such tabs are used, it is advantageous to position them close to the edge.

[0025] The invention is described below by way of example only with reference to the drawing, which is illustrated by: Figure 1 shows various stages of the assembly of a building services user module assembly in perspective view; Figure 2 shows the corresponding frontal view; Figure 3 shows the corresponding views exactly from above; Figure 4 shows the building services user module assembly with mounting plate, holder and user module; Figure 4 shows a sectional view along line AA of Figure 4a with two detail sections; Figure 4c-dDetail sections from Fig. 4b. Fig. 5 a perspective view of the mounting plate for a further embodiment; Fig. 6a-c the mounting plate of the further embodiment in different views. Fig. 7 a sectional view of a part of a mounting plate of the further embodiment, wherein the mounting plate of the further embodiment is in its holder and a module is inserted; Fig. 8 ab perspective views of a further embodiment of the mounting plate from the front and rear, wherein the further embodiment differs from the preceding embodiments by additional grounding lugs provided on the sides of the through-opening; Fig. 8c the embodiment of the Fig. 8a and 8b in different side views.

[0026] Please note that the wall in front of which the building services user modules are arranged and in which the brackets are attached is not shown in the figures. However, it will be clear that the bracket for the mounting plate is anchored in a wall recess so that the mounting plate rests flush against the wall. Standard plastic parts can be installed in the wall for this purpose. A specialist also does not need a drawing to illustrate how the cables are routed into the bracket through the corresponding openings in the bracket.

[0027] First, a first embodiment is described in which locking hooks are provided on the mounting plate to prevent removal; then, a further embodiment is described in which tabs are provided on the mounting plate to prevent removal.

[0028] After Figure 1comprises a building services user module arrangement generally designated 1, a wall-side mounting plate 2 and a building services user module 3 which is locked against removal and held adjacent to the mounting plate. The mounting plate 2 now has two locking hooks 2a 1, 2a2 which protrude from the wall to the front, ie towards the user, and which are guided from the mounting plate centre 4, indicated by the dashed line in Figure 1b and line 4 in Figure 4b , have opposite locking hook engagement ends 2b 1, 2b2, which engage on an abutment 3b formed on the edge 3a of the building services user module when the module is fully assembled (cf. Figure 4b ) are locked and which have a passage opening ( Figure 4b , excerpt).

[0029] The mounting plate 2 is mounted on a bracket 6 firmly anchored in the wall with screws 7a, 7b on diametrically opposite sides of the mounting plate 2. The mounting plate 2 is provided with elongated holes 8a, 8b for the passage of the screws 7a, 7b, which also allow horizontal alignment of the mounting plate by rotation around the mounting plate center 4. The bracket 6 has suitable cable feed openings 6a, 6b through which cables routed in the wall can be fed into the bracket.

[0030] On the mounting plate there are further spring arms, 9a, 9b (cf. Figure 4 ) which protrude away from the user into the holder, cf. Figure 4or Figure 1b. The mounting plate is further provided with a central opening 11, which, when mounted on the holder 6, is located in front of its clear opening, allowing the spring arms 9a, 9b to enter the holder. The size of the opening 11 is sufficient to accommodate the rear end 3c of the building services user module.

[0031] As from Figure 4b As can be seen, the spring arms 9a, 9b are both initially bent such that they do not run parallel to the mounting plate center axis 4, but are inclined toward it. At the same time, the rear end of the building services module is also formed with an inclined edge, which, somewhat away from its rear end, has a recess 10 formed here as a circumferential groove. This contributes to the fact that the modules to be inserted into the mounting plate can initially be inserted far enough without hindrance, namely until they interact with the ends of the spring arms 9a, 9b.

[0032] The end of the spring arms 9a, 9b is now provided with sliding surfaces 9a1, 9a2 (compare the enlarged portions of Figure 4) that merge into one another. These sliding surfaces are inclined against the general direction of the spring arms and merge into one another at a vertex located closer to the central axis 4 of the mounting plate than the other regions of the spring arms. The sliding surface 9a2 located closer to the end of the spring arm, i.e., further away from the user, is longer. It is also understood that the second, identical spring arm 9b will also have corresponding sliding surfaces, but these are not shown separately in an enlarged section.

[0033] The recess 10 has a depth sufficient to accommodate the two sliding surfaces 9a1, 9a2 formed by the indentation, which merge into one another at the apex 9aS, without the apex 9aS striking the bottom 10a of the recess in any insertion position. The width of the recess is selected in relation to the length of the rear sliding surface 9a2 such that even when the

[0034] The user module's inner edge facing the user still rests on the sliding surface 9a2 at the rear end of the recess. Otherwise, when the building services module is unlocked, pulling the building services module out of the mounting plate could be prevented by the spring arm end hitting the wall 10c of the recess 10, which would prevent easy replacement.

[0035] At the user-side end, the locking hook 2a is also formed integrally with the mounting plate by bending the mounting plate sheet, with the engaging end 2b of the locking hook or locking tab being realized by bending back its front end. As shown in Figure 4As can be seen, the through-opening 5 for the introduction of an unlocking tool, with which a force can be exerted through the opening 5 on the straight arm 2a of the locking hook in order to press the locking hook engagement end 2b away from its abutment, is located as close as possible to the end of the locking hook remote from the mounting plate, i.e., it is arranged near the locking hook engagement end. In the illustrated and preferred case of a wide locking hook tab, the abutment formed in the building services user module can be perforated centrally for the through-opening 5. This improves the application of force to the locking hook and ensures better unlockability.

[0036] In the illustrated embodiment, the building services user module has a sufficiently stable, for example, glass-fiber-reinforced plastic housing. It should be appreciated that the building services user modules can be activated using pressure-sensitive points and the like on the front panel (not shown). Finger swiping movements or the like can also be exerted on the front 3d of the user module without the resulting forces causing the module to move in the mounting plate or, together with the mounting plate, relative to the holder. The assembly is mounted as follows: First, a recess sufficiently dimensioned to accommodate the holder is made in a wall, the holder 6 is anchored in the wall as required, and cables are routed through the wall and the opening 6a into the holder 6. The mounting plate 2 can then be inserted into the holder and secured with screws 7a, 7b.

[0037] Since the spring arms 9a, 9b are spaced apart from the inner wall of the holder 6, a horizontal alignment of the mounting plate edge 2c is easily possible without the spring arms hitting the inside of the holder. The mounting plate can be aligned at least roughly horizontally and is fixed in position on the holder 6 by tightening the screws. A module 3 can now be connected to the cables routed through the opening 6a and inserted into the mounting plate.

[0038] Initially, insertion requires only a small amount of force and the module is essentially free to move until the rear end of the module hits the inclined surface 9a 1.

[0039] The further insertion of the module into the mounting plate spreads the spring arms 9a, 9b away from the mounting plate's central axis 4 as the module slides along the sliding surfaces, so that further insertion will only occur against the force of the spring arms. This is easily noticeable to an installer. The installer can therefore slightly reduce the speed with which they press the module into the mounting plate and continue the insertion process until the apex 9aS penetrates the recess 10.The spring arms, already spread by the module not yet being fully inserted, will then exert a holding force on module 3 through their restoring force toward the mounting plate's central axis 4 via the sliding surfaces 9a2. This holding force will pull the module toward the mounting plate, but will not yet be so great that the locking hook 2a is deflected from its rest position to such an extent that the locking hook engagement ends 2b slide onto their locking hook abutment. Module 3 will thus be located close to the mounting plate without being locked, thus being secured against removal without tools.

[0040] The width of the spring arms also ensures that module 3 will not be twisted around axis 4. If, for example, the installer twists module 3 around axis 4, as indicated by arrow 12 ( Figure 4), due to the wide spring arms, a torque will be exerted on the module 3 around the axis 4 by the spring arms 9a, 9b, which will force the module into the correct position relative to the mounting plate.

[0041] The module, which is almost completely in contact with the wall or mounting plate 2, will therefore have a horizontal alignment that is reproducible even when the module is repeatedly inserted, removed and reinserted.

[0042] The horizontal alignment of the module can then be checked. If adjustments are necessary, the module can be removed from the mounting plate, the mounting plate readjusted, and the module reinserted without additional tools. A functional test of the module can also be performed, even if this requires swiping, pressing, or touching the module. If these checks reveal that changes to the wiring or connection are necessary, the module can also be removed without tools, the necessary changes made, and the module can be moved back into the mounting plate in a reproducible manner.

[0043] Once all the necessary work has been completed, the module can be fully pressed against the mounting plate 2. As a result, the locking hook 2 engages, by means of its locking hook engagement ends 2b, with the abutment 3b formed on the edge 3a of the module 3.

[0044] If third parties, such as children playing, attempt to pull the module out of the mounting plate, this will be impossible due to the module's locking mechanism at the abutment. This applies both to tensile forces acting purely along axis 4 and to tilting forces when attempting to remove an edge of the module from the wall. Even moving the module parallel to the wall will not release the locking hook from the abutment because this movement is severely restricted.

[0045] If, however, an authorized person wishes to remove the module 3 from the mounting plate, he or she can move a suitable tool through the through-opening 5 and thereby deflect the locking hook 2a towards the mounting plate center 4 so that the locking hook engagement end 2b detaches from the abutment 3b. This can be done in the Figure 1 The arrangement shown can be done by simultaneously actuating the locking hooks 2a1 and 2a2. The module is then no longer locked and can be moved away from the mounting plate.

[0046] Please note that variations are possible. Figure 1bThe locking hooks are formed on the outer edge of the mounting plate. If waste is to be minimized, the locking hooks could be formed closer to the central axis. It should also be noted that in the illustrated embodiment of the module, the through-opening 5 simultaneously opens the interior volume of the module 3 to the outside, which is particularly advantageous when, as in the illustrated embodiment, a loudspeaker is provided inside the module.

[0047] Furthermore, it is not mandatory to form the securing arrangement with locking hooks on the mounting plate as described above for one embodiment. Rather, it is easily possible to achieve a securing arrangement to secure the module against removal by a different design of the mounting plate, thus preventing the modules from being removed in this way. This will be explained below with reference to the Fig. 5 to 7 described.

[0048] To secure the module against being pulled out from the wall, tabs are formed on the mounting plate which will protrude from the wall when in use, ie when the mounting plate is mounted.

[0049] The corresponding mounting plate is in Figure 5 designated with reference number 20. The mounting plate corresponds per se to the mounting plate of Fig. 1 in such a way that the Fig. 5 shown mounting plate is designed to receive a module and the module is also formed in the same way as the module with reference to Fig. 1 was explained.

[0050] As can be seen by comparing Figures 1b and 4b on the one hand with Figure 5 on the other, the mounting plate 20 is shaped such that it could be arranged in the holder 6 instead of the mounting plate 2. The holder can therefore be standardized.

[0051] As with the mounting plate 2 from the previously described figures, elongated holes are also provided on diametrically opposite sides of the mounting plate 20, which are designated here by 80a and 80b and which in turn allow alignment of the mounting plate by rotating it around the mounting plate center, designated here by 40, for horizontal alignment.

[0052] There are again spring arms formed on the mounting plate 20, which are designated here with 90a, 90b and which, when in use, project away from the user into the holder, ie when the mounting plate 20 is inserted into a holder as in Figure 1 shown and mounted on it.

[0053] Again, as in the first embodiment, a central opening 110 will be located in front of the clear opening in the holder 6 when mounted, so that the spring arms 90a, 90b extend into the holder. The size of the opening 110 is also sufficient here to accommodate the rear end of a building services module.

[0054] Again, the spring arms 90a, 90b are bent such that they do not run parallel to the mounting plate center axis 40, but rather are inclined toward it. In this respect, there are no differences from the design of the mounting plate 2, and the modules to be used are also designed identically with regard to their rear end, facing away from the user during use.

[0055] The mounting plate 20 differs from the mounting plate 2 in that, instead of the two locking hooks 2a 1 2a2 provided in the mounting plate 2, which protrude forward from the wall, tabs 20a, 20b are now formed, which protrude forward from the wall when the mounting plate is arranged in a holder 6. The tabs 20a, 20b are in this case integral with the mounting plate 20. They have an extension such that their edge 20a pointing forward towards the user is projected by a distance 1, compare Figure 5 , from the wall. The tabs are generally bent at right angles away from the plane of the mounting plate. A passage 20al or 20b1 is provided in the inner area of ​​each tab surface 20.

[0056] For the first embodiment, it was described that the locking hooks on the mounting plate lock onto abutments on a mounted module. Instead of such an abutment on the module, other means are provided for the second embodiment on the module, which also allow the modules to be secured to the mounting plate, namely by suitable structures passing through the tabs formed on the mounting plate.

[0057] In the embodiment shown in the figures, locking hooks extending from the center of the mounting plate 10 outward through the tabs can be provided for this purpose. These hooks are hinged to the inside of the module. The free ends thus point toward the wall during use.

[0058] Figure 7shows as an example of this a module 30 intended to interact with the mounting plate 20, specifically in cross-section at the point where the tab 20 is provided on the mounting plate 20 and arms lead from the mounting plate through the through opening 20a 1. As can be seen, on the inside of the module 30 facing the holder 6, a locking arm with a projection protrudes from each tab. The locking arm and projection are arranged such that when the module 30 is resting on the holder 6, the projection penetrates into the corresponding through opening 20a, 20b of the tab. For this purpose, the locking arm is so long that the projection penetrates into the tab opening. When the module is mounted, the locking arm lies above the edge of the tab, far enough that the projection pointing downwards from it penetrates at least partially into the tab opening.

[0059] As from Fig. 7As can be seen, the side of the attachment facing the holder is also slightly rounded, which means that when the module is inserted, the locking arm with its rounded attachment edge is initially deflected at the edge of the tab and thus makes it easier to insert the module.

[0060] The end of the extension facing the inside of the module, however, is inclined more steeply, so steeply that when the module is pulled off, the extension is not deflected away from the opening in the tab, but remains in place until it is pushed upwards from the other side of the opening. For this purpose, a opening 50 is provided in the module edge, which, when the module is mounted, is located directly below the opening in the tab and is dimensioned such that an unlocking tool such as a thin pin can be guided through the opening 50 provided in the module edge up to the extension in order to push it upwards. Again - as in the first embodiment - the opening 50 simultaneously opens the internal volume of the module 3 to the outside, even when the module edge is resting on the holder 6, which is again advantageous where, for example,a loudspeaker is provided inside the module or pressure equalization is desired for another reason.

[0061] The attachment on the locking arm designed in this way also has the advantage of being centered in the bracket due to the inclined side surfaces. To achieve such centering not toward the wall, but also in the plane of the wall, the side areas of the attachment can also be beveled, so that the attachment on the locking arm generally tapers towards a four-sided truncated pyramid.

[0062] This arrangement is used as follows: First, a recess sufficiently dimensioned to accommodate the bracket is made in a wall, the bracket is anchored to the wall as required, and cables are routed through the wall and the opening into the bracket. The second version of the mounting plate can then be inserted into the bracket and loosely secured with screws.

[0063] Since the spring arms 90a, 90b of the mounting plate 20 are spaced apart from the inner wall of the holder 6, a horizontal alignment of the mounting plate edge is easily possible without the spring arms hitting the inside of the holder. The mounting plate can generally be aligned horizontally and is then secured in position on the holder by tightening the screws.

[0064] Now a module that fits the second version of the mounting plate can be connected to the cables that pass through the opening and inserted into the mounting plate.

[0065] As with the first embodiment, insertion initially requires only a small amount of force and the module is essentially free to move until the rear end of the module hits the inclined surface of the spring arms.

[0066] As the module is further inserted into the mounting plate, the spring arms 90a, 90b spread away from the central axis 40 of the mounting plate as the module slides along the sliding surfaces, so that any further insertion will only occur against the force of the spring arms. This is easily noticeable to an installer. The installer can therefore slightly reduce the speed at which they press the module into the mounting plate and continue the insertion process until the apex penetrates the recess. The spring arms, which have already spread apart due to the module not yet being fully inserted, will then exert a holding force on the module via the sliding surfaces in the direction of the central axis 40 through their restoring force. This holding force draws the module towards the mounting plate, but is not yet so great that the locking hook engagement ends provided on the module frame are deflected far enough from their rest position to engage the tabs.Module 3 will therefore be located close to the mounting plate without already engaging the tab.

[0067] The width of the spring arms also ensures that the module will not be twisted around axis 40. If, for example, the installer has inserted the module twisted around axis 40, the wide spring arms will exert a torque around axis 40 on the module from the spring arms 90a, 90b, forcing the module into the correct position relative to the mounting plate.

[0068] The module, which is almost completely in contact with the wall or the mounting plate 20, will therefore have a horizontal alignment that is reproducible even when the module is repeatedly inserted, removed and reinserted.

[0069] The horizontal alignment of the module can then be checked. If adjustments are necessary, the module can be removed from the mounting plate without additional tools, the mounting plate readjusted, and the module (partially) reinserted. A functional test of the module can also be performed, even if this requires swiping, pressing, or touching the module. If these checks reveal that changes to the wiring or connection are necessary, the module can also be removed without tools, the necessary changes made, and the module moved back into the mounting plate in a reproducible manner.

[0070] Once all the necessary work has been completed, the module can be fully pressed against the mounting plate 2. This locks the locking hook engagement ends into the tabs formed on the mounting plate.

[0071] If third parties, such as children playing, attempt to pull the module out of the mounting plate, this will be impossible due to the module's secure connection to the mounting plate. This applies both to tensile forces acting purely along axis 4 and to tilting forces if an attempt is made to remove an edge of the module from the wall.

[0072] However, if an authorized person wishes to remove the module from the mounting plate, they can insert a suitable tool through the opening and thereby deflect the locking hook engagement ends toward the center of the mounting plate, releasing the locking hook engagement end from the tab. The module is then no longer locked and can be moved away from the mounting plate.

[0073] The mounting plate shown above as an example can be designed differently than described or supplemented with additional elements without deviating from the principles explained. Fig. 8 a, b and cAn embodiment of a mounting plate is shown in which grounding lugs are additionally provided laterally of the opening into which the building services module is inserted. The grounding lugs 85a and 85b can be used to establish an electrical grounding connection between the mounting plate and other units such as the building services module and / or a ground conductor. In addition to these grounding lugs, the same means are provided which, in the previously described embodiments, provide a child safety lock, easy alignment, a latching or locking mechanism, etc. Both the structural design and the function of these means are obviously not impaired by the grounding lugs and the grounding effected by them, so that the embodiment of Fig. 8insofar as it can be constructed not only identically, but also used identically. For this reason, in order to improve clarity, the inclusion of additional reference symbols in the Fig. 8a -8c apart.

Claims

1. Domestic user module arrangement comprising a wall-side mounting plate (2), which rests flat on a wall in a mounted state, and a domestic user module, which is held with contact on the mounting plate and is secured against being removed, wherein a holder is provided, which can be firmly anchored in the wall and with which the mounting plate can be aligned and to which the mounting plate is bolted after horizontal alignment, the mounting plate is formed as a frame plate with an aperture through which the rear side of the domestic user module, the rear side facing away from the user, protrudes in the mounted state, has a securing arrangement, which projects from the wall towards the user, for securing the domestic user module against removal, and has a spring arm, which leads away from the user and is dimensioned and arranged such that the rear side of the domestic user module, which protrudes through the frame aperture, slides past the free spring arm end with deflection of the spring arm from its neutral position, before the securing arrangement has secured the module against being removed, and the domestic user module (3) has an edge, which is designed for securing engagement with the securing arrangement of the mounting plate, the securing arrangement projecting from the wall, and has a passage opening, through which a tool can be guided, by way of which tool the securing arrangement can be moved out of engagement using the tool, and wherein the domestic user module (3) has, at its end facing away from the user in the mounted state, an engagement point, at which a force already forcing the domestic user module into contact can be exerted by the spring arm, even before the securing arrangement secures the module against being removed.

2. Domestic user module arrangement according to the preceding claim, characterized in that the securing arrangement is formed on the mounting plate side with a tab projecting from the wall, in which tab an opening, preferably a passage hole, is provided, and an attachment is arranged at the edge of the domestic user module, which attachment, in the event of securing, is guided at least in, preferably through, the opening and can be moved away from the opening for removal purposes.

3. Domestic user module arrangement according to the preceding claim, characterized in that the attachment at the edge of the domestic user module is a locking hook, which enters the passage hole and which can be pushed out of engagement in the direction of the mounting plate centre using the tool, which can be guided through the passage opening, for removal purposes.

4. Domestic user module arrangement according to Claim 1, characterized in that the mounting plate (2) has, as a securing arrangement for securing the module against being removed, at least one locking hook, which projects from the wall and which has a locking hook engagement end on the side facing away from the mounting plate centre, and in that the domestic user module has an edge which, for the securing engagement with the locking hooks, is formed in that it has a locking hook engagement end abutment towards the mounting plate centre, wherein the passage opening, which leads to the securing arrangement, in the edge leads to the locking hooks.

5. Domestic user module arrangement according to any of the preceding claims, characterized in that the domestic user module is designed as and / or with at least one from amongst a sensor, preferably a temperature sensor, a motion sensor, noise sensors and / or a smoke detector; an on-off circuit; a dimmer; a wireless remote control system; a display; an intercom.

6. Domestic user module arrangement according to any of the preceding claims, characterized in that the mounting plate (2) has elongate and / or arcuate holes and the holder comprises screw receptacles for bolting the mounting plate (2) to the holder.

7. Domestic user module arrangement according to any of the preceding claims, characterized in that the mounting plate (2) is formed in one piece from sheet metal.

8. Domestic user module arrangement according to any of the preceding claims, characterized in that the domestic user module rests on the wall surrounding the mounting plate (2) or on the mounting plate (2) itself, preferably with sealing against moisture, particularly preferably a sealing ring resting on the mounting plate (2), and that preferably the edge of the domestic user module is formed by an encircling collar.

9. Domestic user module arrangement according to any of the preceding claims, characterized in that the domestic user module has, on the rear side, a recess, the spring arm is, at its free end, bent with formation of a sliding surface in such a way that the sliding surface rests on the edge of the recess that faces the user, wherein a plurality of spring arms are provided and the spring arm width is of such a size that a module that has not yet been secured but is already held by the spring arms assumes a reproducible orientation relative to the mounting plate (2).

10. Domestic user module arrangement according to the preceding claim, characterized in that at least two opposite spring arms, in particular two spring arms positioned diametrically opposite with respect to the insertion axis, are provided.

11. Domestic user module arrangement according to any of the preceding claims, characterized in that locking hooks, which engage on an abutment, are provided for securing purposes, wherein the spring force of the spring arm is only of such a size or the spring arms are dimensioned such that the domestic user module is not pulled past the locking hooks to the mounting plate (2) without additional pressing-in force, but rather can still be removed from the mounting plate (2), but the spring force is sufficient to secure the module, which has not yet been locked, against being unintentionally moved out.

12. Domestic user module arrangement according to the preceding claim, characterized in that the locking hooks are substantially narrower than the spring arm width and a plurality of spaced-apart locking hooks are provided.

13. Domestic user module arrangement according to any of the preceding claims, characterized in that the passage opening is arranged at the bottom side, in particular between the wall or mounting plate (2) and the edge.