Electrical installation device, in particular touch sensor, with spacer

Abstract

Electrical installation device (1), such as a switch or push button, with a carrier part (2), and with at least two support parts (3) resting on the carrier part (2), wherein the support parts (3) are mounted side by side on the carrier part (2) forming a spacer gap (S), wherein at least one support part (3) is movable from a first position to a second position, characterized in that the distance between two adjacently arranged support parts (3) is set to a constant position by means of at least one spacer (4), wherein the spacer (4) is mounted in such a way as to be floating with respect to the carrier part (2) and the support parts (3) that the spacer (4) is movable transversely to a longitudinal direction of the gap (S) relative to the carrier part (2) and the support parts (3).

Description

[0001] The present invention relates to an electrical installation device, such as a switch or a push button, comprising a carrier part and at least two support parts resting on the carrier part, wherein the support parts are mounted side by side on the carrier part, forming a spacer gap, and wherein at least one support part is movable from a first position to a second position. A return element may be arranged between the carrier part and the at least one support part, by means of which the support part is movable.

[0002] The electrical installation device can, for example, be a touch sensor in which the carrier part is a circuit board carrier on which a circuit board can be arranged as an intermediate part, wherein the at least two support parts resting on the carrier part are operating rockers for actuating switching elements on the circuit board, wherein the operating rockers are mounted next to each other on the carrier part with a gap forming the gap, and wherein at least one operating rocker is movable from a first position, in particular from an actuating position in which the operating rocker actuates at least one switching element, to a second position, in particular to a rest position in which no switching element is actuated.

[0003] Such an electrical installation device, in particular such a touch sensor, is known from patent EP 3 736 930 B1 of the applicant. This patent addresses the problem of further developing known touch sensors in such a way that they allow the precise positioning of at least one rocker switch relative to the circuit board without having to resort to auxiliary devices such as frames surrounding the rocker switches or covers separating the rocker switches from one another. For this purpose, the rocker switch has a positive-locking adapter on its side facing the circuit board, in which the return element is positively locked. The known subject matter of the patent is thus based on the idea of ​​giving the return element a dual function.In addition to its basic function of returning the rocker switch from the actuated position to the rest position after user activation, it is designed, in conjunction with the positive-locking adapter located on the side of the rocker switch facing the circuit board and in which the return element can be positively engaged, to align the rocker switch with the circuit board. EP 3 736 930 B1 describes, as an example, a touch sensor that has four rocker switches as support elements, although this number is not the limit.

[0004] Another electrical installation device of this type, in particular such a touch sensor, is also known from the applicant's patent EP 3 697 177 B1. This document addresses a solution to the problem of further developing known touch sensors in such a way that light guided via an existing light guide to a control surface of the rocker switch exhibits both a precise and an adjustable color spectrum. For this purpose, the light guide is provided to have a first light entry surface and a second light entry surface separate from the first, wherein light generated by a first light source is coupled into the light guide through the first light entry surface, and wherein light generated by a second light source is coupled into the light guide through the second light entry surface.wherein, for coupling light into the light guide, a first reflector is positioned upstream of the first light-entry surface of the light guide and a second reflector is positioned upstream of the second light-entry surface, and wherein each of the two reflectors is a reflective boundary wall of a separate light mixing chamber, wherein the light generated by a first of the light sources is coupled into a first of the two separate light mixing chambers and the light generated by a second of the light sources is coupled into a second of the two separate light mixing chambers, wherein a rocker mount is arranged between the circuit board and the at least one rocker switch, to which the at least one rocker switch is pivotably attached. This document also describes, by way of example, a touch sensor which has four rocker switches as mounting elements, wherein pairs of one switching element and two light sources are arranged opposite each other.Thus, a total of eight of these arrangements are provided on the circuit board in pairs opposite each other, with four arrangements on each of two opposite edges of the board. Each rocker switch is designed – as also according to EP 3 736 930 B1 – as a flat hollow cuboid with an open bottom, i.e., it has a flat top surface as an operating surface and two long and two short side surfaces projecting from the top surface – in the mounted state towards the circuit board carrier. The rocker switches are each received by a rocker mount that covers the circuit board.

[0005] When designing electrical devices, especially touch sensors of the type mentioned above, defining tolerances is a key task for the designer, particularly when these devices are equipped with light illumination, as specified in EP 3 697 177 B1. This is essential for completing the geometric description of the existing components and assemblies. Part of this task involves analyzing how individual tolerances of components, such as those of adjacent rocker switches, combine to form an overall tolerance within the assembly. This ensures that important, and especially critical, functions, such as gap distances, clearances, mounting capabilities, and correct light illumination orientation, are guaranteed through the design.

[0006] A problem associated with such component tolerances of electrical installation devices was already addressed, for example, in the applicant's patent EP 3 059 819 B1 in connection with an electrical switch, comprising a switch base for receiving electrical connection and switching elements as well as mechanical switching elements that actuate the electrical switching elements and transmit a switching movement, such as at least one switch button or rocker switch, which is / are mounted within a cover frame, and with - in contrast to the design of the touch sensors according to EP 3 736 930 B1 and EP 3 697 177 B1 - also a support ring for fixing the switch base in a mounting opening, in particular in a flush-mounted box.These switches have a particular problem: if the mounting ring is installed off-center or at an angle in the mounting opening, parallelism between the inner edges of the cover frame (enclosing the rocker or button) and the opposite edges of the rocker or button cannot be achieved. This results in misalignment in the horizontal and / or vertical direction. To compensate for this misalignment, a gap must be provided to ensure clearance between the rocker or button and the cover frame, requiring a specific gap width. However, a gap width that varies due to tolerances, which is particularly noticeable with surface-mounted switches, is undesirable for several reasons. This is especially true for multi-switch combinations, e.g.,...When two, three, four, or five switches are arranged in a row within a common cover frame, different gap profiles can occur between the individual switches due to non-matching installation positions, significantly impairing the overall visual appearance. To compensate for installation deviations caused by lateral and / or rotational changes in the position of the support ring and the switch base, starting from an optimal central position when installed in a mounting opening, and thus prevent changes in the gap width between the cover frame and the switch button or rocker switch, a technical solution is described in EP 3 059 819 B1, according to which the rocker switch or...The switch button is pivotably mounted on a frame-shaped clamping piece, wherein the clamping piece is rotatable about a central perpendicular to the support ring on an opening plane of a support ring opening enclosed by the support ring and / or laterally displaceable about the central perpendicular.

[0007] Maintaining a specific and uniform gap pattern between the support parts, such as the rocker switches, and also between electrical installation devices, is also an important design feature of electrical installation devices of the type mentioned above, in particular touch sensors according to EP 3 736 930 B1 and EP 3 697 177 B1, which have now proven themselves in practice.

[0008] Several concepts were developed to optimize this gap pattern. These concepts were based primarily on centering the operating rockers—for example, by ribs in the wall of the circuit board carrier or by extensions on the underside of the rocker engaging corresponding recesses in the circuit board—within a receptacle. However, due to tolerances, this did not always result in an optimal gap pattern between the supporting parts, as these concepts also had several drawbacks. For instance, the gap pattern could be negatively affected, especially with a long tolerance chain spanning multiple components and assemblies, primarily by the presence of larger tolerances.

[0009] Furthermore, the usual use of the same materials for adjacent components, such as polycarbonate for the rocker switches, could lead to a negative effect on the acoustic behavior due to the so-called stick-slip effect resulting from sliding against each other when the touch sensors are activated.

[0010] The present invention is based on the objective of designing an electrical installation device of the type described above in such a way as to ensure compliance with a predetermined and uniform gap pattern, thereby largely avoiding disadvantages such as those described above.

[0011] According to the invention, this is achieved by the presence of at least one spacer by which the distance between two adjacently arranged support parts is set to a constant, wherein the spacer is mounted in such a way as to be floating with respect to the support part and the support parts that the spacer is movable transversely to a longitudinal direction of the gap relative to the support part and the support parts.

[0012] The carrier part can preferably be a circuit board carrier on which a circuit board is arranged as an intermediate part, and the support parts can be rocker switches for actuating switching elements on the circuit board, which can be moved from a rest position in which no switching element is actuated to an actuating position in which the support part actuates at least one switching element.

[0013] At least one support element can also be formed from an edge area of ​​a frame that may be present.

[0014] According to the invention, it is advantageous that the additional spacer, which is floating relative to the support part but simultaneously connected to two adjacent support parts, positively influences the tolerance chain of the support part assemblies, such as rocker switches and / or frames, so that the gap pattern can be optimized by reducing tolerances. For example, according to the invention, with four adjacent support parts, the permissible clearance for each support part can no longer quadruple unchecked in a tolerance chain and negatively affect the gap width accordingly.

[0015] In the aforementioned concepts, which are based on the fact that the support elements – e.g., by ribs on the rocker – are centered in the wall of the carrier part or – e.g., by extensions on the underside of the rocker – in the circuit board as an intermediate element on the carrier part, the dimensions of the carrier part or the intermediate element determine the tolerances. The provisions of DIN EN ISO 286-1:2019-09 "Geometric product specification (GPS) – ISO system of tolerances for linear dimensions – Part 1: Basis for tolerances, deviations and fits" apply here, according to which tolerance groups are defined for the tolerances and the permissible dimensional deviations for a component and its manufacturing tooling in each tolerance group result from limit deviation ranges (nominal dimensions) of the component.Since the width of the component "spacer" is small compared to the associated width of the "support part"—it can be in the range of 5% to 25%, preferably 10% to 15% of the support part width—much smaller tolerances result. These, in turn, correlate with a significantly reduced possible variation in the gap width, as subsumed under "constantly set" within the scope of the invention.

[0016] This can be demonstrated using specific calculations. The equation for determining the arithmetic closing dimension tolerance Ta is as follows: Ta=∑i=1k(ti)

[0017] This contains the t i the individual tolerances of the components to be considered, and k is the number of components.

[0018] Calculating the arithmetic closing tolerance Ta according to this equation has the advantage that the respective "worst case" is taken into account, and it is a prerequisite for a statistical tolerance analysis.

[0019] The equation for determining the general statistical closing dimension tolerance Ts is: Ts=2∗u∗∑i=1k(σ2i)

[0020] In this approach, the distribution-specific variances σ are used. 2 i The individual component tolerances are summed and calculated using the square root to obtain a resulting overall standard deviation. Subsequently, the statistical closing tolerance T can be determined using the factor u (the so-called quantile) for a desired confidence interval (e.g., u = 3 corresponds to an acceptance probability of 99.73002% or a so-called Cp value of 1.00, according to which the tolerance limits can just be met). S will be calculated.

[0021] Advantageously, the additional spacer can easily be made of a different material than the support parts separated by the gap. For example, since the component is not a visible design element, a semi-crystalline or crystalline plastic, especially polyoxymethylene (POM), can be used for the spacer, while the support parts can be made of an amorphous or semi-crystalline plastic, especially polycarbonate (PC). This also eliminates the risk of the stick-slip effect and thus of negative acoustic noise.

[0022] In an embodiment of the invention, it may be advantageous if the spacer has a basic shape in cross-section, in particular a symmetrical one, which results from the composition of the surfaces of a comb with three teeth and a T standing on it.

[0023] In this way, on the one hand, receiving grooves can be formed between the middle tine of the comb, which in the assembled state lies under the gap, and the two outer tines of the comb, for side walls projecting from the top wall of the support parts, such as from the operating surface of a rocker, towards the support part, in particular towards the circuit board support.

[0024] On the other hand, grooves for an edge piece of the support part can also be formed between the crossbar of the T and the comb piece connecting the prongs. In this way, when the corresponding parts are engaged, the floating mounting of the spacer, i.e., its lateral movement relative to the support part and the bearing surfaces, can be ensured during assembly.

[0025] It can be advantageous if, in the assembled state, side walls of the support part engage in the receiving grooves between the middle prong of the comb and the two outer prongs of the comb, and edge pieces of the support part engage in the receiving grooves between the crossbar of the T and the comb piece connecting the prongs, resulting in transition fits or clearance fits between the corresponding parts.

[0026] In a transition fit, depending on the actual dimensions of the receiving groove and the corresponding component dimension it accommodates, either a clearance or an interference occurs during assembly. The maximum dimension of the receiving groove is larger than, and in the limiting case, equal to, the minimum dimension of the component wall. In a clearance fit, the minimum dimension of the receiving groove is always larger than, and in the limiting case, equal to, the maximum dimension of the component dimension it accommodates.

[0027] Advantageously, self-centering of the spacer with respect to the gap or the parts connected by the spacer can also be achieved. Particularly in the case of a tolerance chain shortened according to the invention (support part / spacer / support part) compared to the prior art (touch sensor with more than three operating rockers as adjacent support parts, as exemplified in EP 3 736 930 B1 and EP 3 697 177 B1), corresponding tolerance management for the individual components with the setting of an optimal, comparatively smaller closing dimension can be easily accomplished.

[0028] The design of a circuit board as an intermediate component between the support part and the mounting part is uncritical. Based on the known state of the art, a person skilled in the art can easily make the necessary geometric adjustments, which in particular take into account the specific intended design of the inner surface of the support part, e.g., by providing openings in the circuit board for mounting points on the support part for the movable attachment of the rocker switches.

[0029] Further advantageous embodiments of the invention are contained in the dependent claims and the following description, wherein the features of the dependent claims are advantageous independently of one another and also only in combination with the features of the main claim alone.

[0030] The invention will be explained in more detail with reference to the accompanying drawings. These show: Fig. 1 a perspective bottom view of a preferred embodiment of an electrical installation device according to the invention, Fig. 2 a perspective bottom view of the preferred embodiment of an electrical installation device according to the invention without its support part, Fig. 3 an enlarged section through the preferred embodiment of an electrical installation device according to the invention along line III-III in Fig. 1.

[0031] Regarding the following description, it is expressly emphasized that the invention is not limited to the exemplary embodiment and not to all or several features of the feature combinations described in that embodiment. Rather, each individual partial feature of the exemplary embodiment can have inventive significance independently of all other partial features described in connection with it, both on its own and in combination with other features.

[0032] In the figures of the drawing, the same and corresponding parts are always provided with the same reference symbols, so that they are usually only described once each.

[0033] As initially Fig. Figure 1 shows an electrical installation device 1 according to the invention, such as a switch or a push button, in particular a touch sensor, comprising a carrier part 2 and at least two, in this case four, support parts 3 resting on the carrier part 2. The support parts 3 are mounted side by side on the carrier part 2, with a gap S between them. At least one support part 3 is movable from a first position to a second position.

[0034] According to the invention, the distance between two adjacently arranged support parts 3 is set to a constant distance by means of at least one spacer 4, in the present case two spacers 4 arranged in pairs, wherein the spacer 4 is mounted in such a floating manner with respect to the support part 2 and the support parts 3 that the spacer 4 is movable transversely to a longitudinal direction of the gap S relative to the support part 2 and the support parts 3.

[0035] The paired arrangement of the spacers 4 defines a straight line for the respective gap S. The spacer 4 can preferably be arranged in an edge region of the support part 2, wherein – as Fig. Figure 1 shows – in particular a vertical central axis M through the spacer 4 at a distance LA from the edge of the support part 2, which is less than 30%, preferably less than 25%, and most preferably less than 20% of the length L of the support part 2. The vertical central axis M through the spacer 4 also defines – how Fig. Figure 3 shows a central axis through the gap S. By arranging the spacers 4 in pairs in the edge areas of the support part 2, it is advantageous to counteract any tilting of the support parts 3, so that they are arranged in parallel to each other.

[0036] The carrier part 2 can, in a manner known in itself – e.g., as from the aforementioned publications – be in particular a circuit board carrier on which, as an intermediate part 5, a component only in Fig. The circuit board shown in section 3 is arranged with the support parts 3 being rocker switches for actuating switching elements on the circuit board. These rocker switches are movable from a rest position, in which no switching element is actuated, to an actuating position, in which the support part 3 actuates at least one switching element. Switching elements can be arranged in pairs on the circuit board, particularly at opposite edges, and each pair can be actuated by the rocker switch.

[0037] The support parts 3 can be made of a different material than the spacer 4. For example, the support parts 3 can advantageously be made of an amorphous or semi-crystalline plastic, in particular polycarbonate (PC), and the spacer 4 of a semi-crystalline or crystalline plastic, in particular polyoxymethylene (POM).

[0038] Furthermore Fig. As shown in Figure 2, the support parts 3 can preferably each be operating rockers and preferably be designed in their basic shape as a flat hollow cuboid with an open bottom, wherein the support part 3 each has a preferably flat top wall D as an operating surface and two long side walls SL as well as two short side walls SK, which extend from the top wall D in the assembly state towards the (in Fig. The two support parts (not shown) project towards the carrier part 2. Two, three, - as shown - preferably four or more support parts 3, in particular operating rockers, can be attached to the carrier part 2.

[0039] On the support part 2, connection points (not shown) for the support parts 3, e.g., shaft stubs as locking elements, can be formed, to which the support parts 3, in particular the operating rockers, can be movably, in particular pivotably, attached, e.g., clipped in. Fig. 2 are corresponding locking elements of the support part 3 designated by reference numeral 6. Fig. Figure 2 also shows that between the support part 2 and the at least one support part 3, in particular directly on the support part 3, a return element 7, preferably spring-loaded, can be arranged, by means of which the support part 3 can be moved back from its second position, in particular from the operating position, to its first position.

[0040] As is particularly evident Fig. 3, but also Fig. As illustrated in Figure 2, the spacer 4 can have a basic shape in cross-section, particularly one axially symmetrical about a plane running through its central axis M, which results from the composition of the surfaces of a comb with three teeth Z, which can also be described as a horizontal E, and a T standing on the back of the comb. The teeth Z can taper to a point at their ends or – as in Figure 2 – be angled. Fig. 3 shown - rounded.

[0041] Between the middle prong Z of the comb, which in the assembled state lies below the gap S, and the two outer prongs Z of the comb, receiving grooves N1 are formed for the long side walls SL projecting from the cover wall D of the support parts 3 towards the support part 2.

[0042] Between the crossbar of the T and the comb piece (comb back) connecting the prongs Z, receiving grooves for edge pieces of the support part are formed.

[0043] In the assembled state, the long side walls SL of the support part 3 engage in the receiving grooves N1 between the middle prong Z of the comb and the two outer prongs Z of the comb, so that two adjacent support parts are fixed together. Simultaneously, to complete the floating mounting, edge pieces R of the support part 3 engage in the receiving grooves N2 between the crossbar of the T and the comb piece connecting the prongs, with the spacer 4 being laterally movable relative to the support part 2 and the support parts 3. Transition fits or clearance fits can exist between the side walls SL of the support part 3, the edge pieces of the support part 2, and their respective receiving grooves N1 and N2. The crossbar of the T can lie in a recess V under the edge piece R of the support part 2.

[0044] The design of the spacer 4 described above is also considered to have inventive significance.

[0045] Likewise, an electrical installation device arrangement is considered to have inventive significance if it comprises at least two electrical installation devices 1 according to the invention, wherein the electrical installation devices 1 are connected to each other at their edges via at least one spacer 4, and its function-determining structure is characterized by at least some features as described above.

[0046] Within the framework of comparative investigations of the invention with the concepts explained above, according to which the dimensions of the support part or the intermediate part are tolerance-determining, the arithmetic closing dimension tolerance Ta and the general statistical closing dimension tolerance Ts were determined as stated above. The basic structure and dimensions of the respective electrical installation devices were identical.

[0047] In comparison to an embodiment in which the support elements 3 were fixed to the rocker arm in the wall of the support element 2 by means of ribs, Ta and Ts values ​​were reduced by 20% according to the invention. Gap divergences and, conversely, gap convergences were avoided.

[0048] In comparison to an embodiment in which the support elements 3 were fixed to the carrier element 2 by extensions on the underside of the rocker in the circuit board as an intermediate element 5, the invention showed Ta and Ts values ​​reduced by as much as 53%. Gap divergences and, conversely, gap convergences could be avoided.

[0049] The invention is not limited to the combinations of features defined in independent claims 1, 18, and 19, but can also be defined by any other combination of specific features from all disclosed individual features. This means that, in principle, virtually any individual feature of the independent claims can be omitted or replaced by at least one individual feature disclosed elsewhere in the application.

[0050] Furthermore, a person skilled in the art can add further suitable technical measures without departing from the scope of the invention. For example, the support elements 3 can be equipped with a light-guiding system, as described above, from the applicant's patent EP 3 697 177 B1. The advantages of the invention become particularly evident in connection with backlighting of the components. Reference symbol list 1 electrical installation device 2 carrier part of 1 3rd edition of 1 4 spacers 5 Intermediate part 6 locking elements of 3 for 2 7 Reset element D Cover wall of 3 L Length of 2 LA distance M from edge 4 M center axis of 4 N1 slots between Z for SL N2 grooves between "comb" and "T" of 4 for R R edge piece of 2 S gap between support parts 2 SK short side wall of 3 SL long side wall of 3 V Further study under R Z prongs of 4 QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 3 736 930 B1 [0003, 0004, 0006, 0007, 0027] EP 3 697 177 B1 [0004, 0005, 0006, 0007, 0027, 0050] EP 3 059 819 B1

[0006] Cited non-patent literature

[0000] DIN EN ISO 286-1:2019

[0015]

Claims

Electrical installation device (1), such as a switch or push button, with a carrier part (2), and with at least two support parts (3) resting on the carrier part (2), wherein the support parts (3) are mounted side by side on the carrier part (2) forming a spacer gap (S), wherein at least one support part (3) is movable from a first position to a second position, characterized in that the distance between two adjacently arranged support parts (3) is set to a constant position by means of at least one spacer (4), wherein the spacer (4) is mounted in such a way as to be floating with respect to the carrier part (2) and the support parts (3) that the spacer (4) is movable transversely to a longitudinal direction of the gap (S) relative to the carrier part (2) and the support parts (3). Electrical installation device (1) according to claim 1, characterized in that the distance between two adjacently arranged support parts (3) is set to a constant level by means of two floating spacers (4) which are assigned in pairs, in particular to the gap (S) between the support parts (3). Electrical installation device (1) according to claim 1 or 2, characterized in that the carrier part (2) is a circuit board carrier on which a circuit board is arranged as an intermediate part (5), and that the support parts (3) are in particular operating rockers for actuating switching elements on the circuit board, wherein the support part (3) is movable from a rest position in which no switching element is actuated to an actuating position in which the support part (3) actuates at least one switching element. Electrical installation device (1) according to one of claims 1 to 3, characterized in that at least one support part (3) is an edge region of a frame. Electrical installation device (1) according to one of claims 1 to 4, characterized in that the support part(s) (3) is / are made of a different material than the spacer (4). Electrical installation device (1) according to claim 5, characterized in that the support part(s) (3) consist of an amorphous or semi-crystalline plastic, in particular polycarbonate (PC), and the spacer (4) consists of a semi-crystalline or crystalline plastic, in particular polyoxymethylene (POM). Electrical installation device (1) according to one of claims 1 to 6, characterized in that a return element is arranged between the support part (2) and the at least one support part (3), in particular on the support part (3), by means of which the support part (3) can be moved back from its second position to its first position. Electrical installation device (1) according to one of claims 1 to 7, characterized in that connection points, in particular locking elements, are formed on the support part (2), on which the at least one support part (3), in particular the operating rocker, is pivotably attached via corresponding locking elements (6). Electrical installation device (1) according to one of claims 1 to 8, characterized in that the at least one support part (3) is an operating rocker and is in particular designed in its basic shape as a flat hollow cuboid with an open bottom, wherein the support part (3) has a preferably flat top wall (D) as an operating surface and two long side walls (SL) as well as two short side walls (SK) which project from the top wall (D) in the assembly state towards the support part (2). Electrical installation device (1) according to one of claims 1 to 9, characterized in that two, three, four or more support parts (3), in particular operating rockers, are attached to the support part (2). Electrical installation device (1) according to one of claims 1 to 10, characterized in that the carrier part (2) is designed as a circuit board carrier on which a circuit board is arranged, on which switching elements are arranged in pairs at opposite edges, each of which can be actuated in first positions of a rocker switch by a rocker switch. Electrical installation device (1) according to one of claims 1 to 11, characterized in that the spacer (4) has a basic shape in cross-section, in particular axially symmetrical, which is formed by the composition of the surfaces of a comb with three teeth (Z) and a T standing on the back of the comb. Electrical installation device (1) according to claim 12, characterized in that between the middle tine of the comb, which in the assembly state lies under the gap (S), and the two outer tines of the comb, receiving grooves are formed for side walls projecting from a / the cover wall of the support parts, such as from the operating surface of a / the rocker, towards the support part, in particular towards the circuit board support. Electrical installation device (1) according to claim 4 and claims 12 or 13, characterized in that receiving grooves for edge pieces of the support part are formed between the crossbar of the T and the comb piece connecting the prongs Z. Electrical installation device (1) according to claims 12 to 14, characterized in that, in the assembly state, side walls of the support part engage in the receiving grooves between the middle prong of the comb and the two outer prongs of the comb, and edge pieces of the support part engage in the receiving grooves between the crossbar of the T and the comb piece connecting the prongs, wherein the spacer (4) is laterally movable relative to the support part (2) and to the support parts (3). Electrical installation device (1) according to claim 15, characterized in that transition fits or clearance fits are present between the side walls of the support part (3) and the edge pieces of the support part (2) and the respective corresponding receiving grooves. Electrical installation device (1) according to one of claims 1 to 16, characterized in that the spacer (4) is arranged in an edge region of the support part (2), wherein in particular a central axis (M) of the spacer (4) is at a distance (LA) from the edge of the support part (2) which is less than 30%, preferably less than 25%, and particularly preferably less than 20% of the length (L) of the support part (2). Spacer (4) for an electrical installation device (1), such as for a switch or push button, according to one of claims 1 to 17, characterized by the features of the characterizing part of one or more of claims 1, 5, 6 and / or 12 to 17. Electrical installation device arrangement comprising at least two electrical installation devices (1) according to one of claims 1 to 17, characterized in that the electrical installation devices (1) are connected to each other at their edges via at least one spacer (4) according to claim 18.

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