Electronic device for installing in a switch cabinet, which electronic device has a first and a second fastener

The invention relates to an electronic device with a device base for mounting the electronic device on a support, wherein at least one pivot arm is partially taken up in a receptacle of the device base and partially protrudes from the device base, which arm is adjustable about a pivot axis parallel to a contact side of the device base, wherein, in a first setting position of the pivot arm, a first attachment means is arranged outside the receptacle and wherein, in a second setting position of the pivot arm, a second attachment means differing from the first attachment means is arranged outside the receptacle, characterized in that a recess opening into the receptacle is formed on a side wall of the device base, into which recess a locking piece is inserted, which is adjustable between a release position, in which it releases the pivot arm, and a locking position, in which it fixes the pivot arm optionally in the first or in the second setting position. The electronic device can be a control cabinet lamp in particular.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a 371 U.S. National Stage of International Application No. PCT/DE2017/100272, filed on Apr. 6, 2017, which claims priority to German Application No. 10 2016 107 044.0, filed Apr. 15, 2016. The entire disclosures of the above applications are incorporated herein by reference.

FIELD

The invention starts out from an electronic device, in particular a control cabinet lamp, for installation in a control cabinet with a device base for mounting the electronic device on a support, wherein at least one pivot arm is partially taken up in a receptacle of the device base and partially protrudes from the device base, which arm is adjustable about a pivot axis parallel to a contact side of the device base, wherein in a first setting position of the pivot arm a first attachment means is arranged outside the receptacle, and wherein in a second setting position of the pivot arm a second attachment means differing from the first attachment means is arranged outside the receptacle. Such an electronic device formed as a control cabinet lamp is known from EP 1 873 403 B1.

BACKGROUND

In the arrangement of a control cabinet lamp in the interior of the control cabinet, for example, the exact location and the exact nature of the arrangement of the control cabinet lamp have frequently been subordinate to the space requirement of the components arranged in the interior of the control cabinet, so that in particular no fixed mounting location exists for the control cabinet lamp and this must be determined individually in each specific application. The control cabinet lamp can also not be arranged everywhere in the interior of the control cabinet. From its mounting location it must, for example, be able to guarantee reasonable illumination of the control cabinet interior and its mounting location must permit cable routing of the power supply cable of the control cabinet lamp that does not obstruct access to the interior of the control cabinet. The control cabinet lamp must further be arranged so that it does not obstruct the cooling air circulation provided by a cooling device inside the control cabinet, and not least the control cabinet lamp must be arranged so that a light or movement sensor of the control cabinet lamp is oriented facing the control cabinet door or at least the control cabinet interior for activating the control cabinet lamp.

The electronic device must therefore be prepared to be able to adapt individually to the very different mounting conditions, so that it should have different attachment means, for example, to permit mounting on a frame section of the control cabinet on the one hand, for instance, and on the other hand to permit mounting on a flat part of the control cabinet, on the mounting plate or on the base plate of a roof-mounted cooling unit.

SUMMARY

The aspect of the invention is therefore to propose an electronic device of the type described at the beginning, which is prepared for flexible mounting using different attachment means and is kept as simple as possible in design terms in order to facilitate cost-effective manufacture. Furthermore, the device to be proposed should be formed so that at least one of the different attachment means permits equipotential bonding between the unit and the support on which the unit is mounted, at least in one embodiment.

It is provided accordingly that a recess opening into the receptacle is formed on a side wall of the device base, into which recess a locking piece is inserted, which is adjustable parallel to the pivot axis between a release position, in which it releases the pivot arm, and a locking position, in which it fixes the pivot arm optionally in the first or the second setting position.

The pivot arm can be a freely movable, axially supported metal molding, which has the first and the second attachment means perpendicular to the pivot axis at opposite ends on both sides of the pivot axis. Such a pivot arm can be a punched molding. The pivot arm can be supported in opposing side walls of the device base, for which these bearing receptacles, for example in the form of holes, are formed on opposing inner sides of the side walls of the device base, which delimit the receptacle of the device base.

The locking piece can be a plastic molding, in particular an injection molding, which in a release position, in which it protrudes at least partially out of the recess in the side wall of the device base, releases the pivot arm to the extent that it is freely adjustable about its pivot axis between its two setting positions. The locking piece can have at least one attachment means receptacle, in particular at least one form-fit receptacle, on its end facing the device base, wherein the at least one receptacle for an attachment means is adapted to the contour of one of the two attachment means and wherein if necessary the second attachment means receptacle, if present, is adapted to the contour of the other attachment means. Depending on the setting of the pivot arm, the respective attachment means that does not protrude from the device base is consequently taken up in the receptacle of the device base, in the respective (form-fit) receptacle in the first or the second setting position of the pivot arm, so that the pivot arm is fixed immovably in one or the other setting position.

The at least one receptacle for an attachment means can have a run-up slope, in order to pretension the pivot arm in the first or the second setting position. If at least one of the attachment means is a hook element with contact claws, for example, contacting of the hook element with the support, for example a painted metal section frame of a control cabinet, can be facilitated by the pretensioning of the hook element, in order to create equipotential bonding between the attachment means and the support.

The first attachment means can be formed for the tool-dependent attachment of the electronic device to the support, for example, while the second attachment means is formed for the tool-free attachment of the control cabinet lamp to the support. For the tool-dependent attachment, the first attachment means can be formed as a bolt receptacle, outlet opening or eye, for example. For the tool-free attachment, the second attachment means can be formed as a hook element, for example. The first or the second attachment means can have contact claws, in order to improve the contacting between the attachment means and the support of the electronic device.

The pivot arm can be manufactured from an electrically conductive material, in particular from a metal, and also be connected electrically to a protective conductor of the electronic device. The electrical contacting between the pivot arm and the device base can take place, for example, via bearing extension pieces of the pivot arm, via which the pivot arm is supported pivotably in bearing receptacles on the device base. However, it can also be provided that the pivot arm electrically contacts a contact in the receptacle of the device base at least or exclusively in the first and/or second setting position, which contact is connected electrically to the protective conductor, for example via an electrical conductor.

For example, a contact ridge of one of the two attachment means molded in one piece onto the pivot arm can electrically contact the contact when the pivot arm is located in the setting position in which the other attachment means protrudes from the receptacle. For example, a contact ridge of the second attachment means can contact the contact electrically when the pivot arm is located in the first setting position and the first attachment means is arranged outside the receptacle. The contact can be formed as a flexible contact spring sheet, for example.

The pivot arm can be supported in the receptacle of the device base in various ways. A variant that is simple in design and thus low-cost provides that the pivot arm has two bearing extension pieces opposing one another, which each engage in a bearing receptacle in the device base and form the pivot axis. In this case the first and the second attachment means can be molded opposingly onto the pivot axis perpendicular to the pivot axis.

One of the attachment means can be formed as a substantially S-shaped hook element, while the other attachment means is an attachment eye, for example a through hole in a mounting flange.

The locking piece can assume a latching position in the locking position and press the pivot arm into the fixed setting position with pretensioning. Furthermore, the locking piece can assume another latching position in the release position, in order to identify the release of the pivot arm haptically.

The locking piece can act in the locking position on the attachment means of the pivot arm that is arranged inside the receptacle. Furthermore, the locking piece can close at least the recess on the side wall and an access to the receptacle on an end face of the device base in the locking position. This is not only aesthetically advantageous, as it takes care of the required IP protectability in the control cabinet construction, and also guarantees operational security in that it prevents a person from inadvertently reaching into the receptacle.

It can further be provided that the pivot arm can be fixed by way of the locking piece in at least two different locking positions, in order to permit an adaptation of the orientation of the attachment means to a given geometry of the support.

DETAILED DESCRIPTION

FIGS. 1-3show an exemplary embodiment of an inventive control cabinet lamp1with a view onto the device base on the end face formed as a lamp base2, in which, for example, substantial components of the control electronics for a light source of the control cabinet lamp1can be taken up. The control cabinet lamp1can have a circuit board with a plurality of LEDs or OLEDs as a light source, for example, which are arranged in the light fixture18underneath a transparent cover, wherein the circuit board is connected electrically to the control electronics in the lamp base2. The lamp base2also has a socket insert17, in order to provide a voltage supply for another power consumer, for example to connect a service unit (e.g. laptop, diagnosis unit etc.) in the event of servicing.

The control cabinet lamp1can be placed via its contact side5, which is a base side of the lamp base2, on a support, for example a control cabinet rack, a flat part of a control cabinet or a mounting plate, but also facing the control cabinet interior on a bottom plate of a roof-mounted cooling unit and mounted thereon by way of the first attachment means6.

In the diagram shown inFIG. 1, the pivot arm4with its first attachment means6formed as a mounting flange protrudes from a receptacle in the lamp base2. The mounting flange6has a through-hole to fix the mounting flange on the support with the aid of a bolt. The second attachment means (7, seeFIG. 2), which is not recognizable in the diagram according toFIG. 1, is taken up in the receptacle3.

The locking piece10is located in its position slid fully into the recess9, which represents a locking position, in which the pivot arm4is fixed in the first setting position shown and is pretensioned if necessary in the first setting position. It is also to be recognized that the locking piece10, which is inserted into the lamp base2via a recess9formed in the side wall8of the lamp base2, at least proportionally closes both the recess9on the side wall8and an access25on the end face26of the lamp base2. The locking piece10thus protrudes through the recess9into the receptacle3of the lamp base2and interacts in such a way with the second attachment means (7, not shown) located in the receptacle3that the pivot arm4is fixed in the first setting position shown. To this end the locking piece10can have a receptacle, for example a form-fit receptacle, in which the second attachment means (7, not shown) is taken up in the locking piece10at least proportionally in a form-fit manner in the locking position shown.

By analogy withFIG. 1,FIG. 2shows the pivot arm4in the second setting position, so that this protrudes with its second attachment means7from the receptacle3. The first attachment means6is recognizably taken up at least proportionally in an attachment means receptacle (29) (cf.FIG. 6) of the locking piece10, so that the pivot arm4is locked in the second setting position shown. The attachment means receptacle (29) of the locking piece10can be formed so that it acts upon the pivot arm4with pretensioning in the direction of the second setting position shown, for example to promote contact of the pivot arm4with the support on which the control cabinet lamp1is mounted, or to guarantee a secure seating of the control cabinet lamp1on the support.

In the diagram according toFIG. 3, the locking piece10is located in its release position, it therefore protrudes from the receptacle9above the side wall8, at least so far that free pivoting of the pivot arm4is possible between the setting positions.

It is also recognized fromFIG. 3that if the locking piece10is located in the release position, in particular the access25on the end face26of the lamp base2is open, it is therefore no longer closed by the locking piece10so that, starting from the situation according toFIG. 3, the first attachment means6can be pivoted out of the lamp base2via the access25in the end face26, for example, in order to transfer the pivot arm4into the first setting position according toFIG. 1.

FIGS. 4 and 5illustrate once more in detail that in the two locked setting positions only the first or the second attachment means6,7respectively protrudes from the lamp base2and all constituents of the pivot arm4beyond this, in particular the other attachment means6,7are completely taken up in the lamp base2.

The detailed view ofFIG. 6shows in particular the interaction of the pivot arm4and the locking piece10and a contact12for the equipotential bonding. In the diagram according toFIG. 6, the pivot arm4is located in a first setting position, in which the pivot arm4protrudes with its first attachment means6(cf.FIG. 1) from the receptacle3in the lamp base2. The locking piece10is located in its locking position. In this the locking piece10presses with one shoulder19against the pivot arm4, so that this is pretensioned in the first setting position. The movement of the pivot arm4is further limited by a counterholder28forming a stop. It is to be recognized that the second attachment means7is not taken up in an attachment means receptacle of the locking piece10in the locking position shown.

The pivot axis of the pivot arm4is formed by two opposing bearing extension pieces14, which are taken up in bearing receptacles15(only one bearing receptacle15is shown) on the opposing insides of the lamp base2. The pivot arm4contacts with a contact ridge13an electrical contact12, which is connected electrically to the circuit board21, so that the circuit board21is earthed via the pivot arm4relative to the support on which the control cabinet lamp1is mounted.

The locking piece10has a grooved profile27, which is accessible via the access25on the end face26of the lamp base2and is used to move the locking piece10out of the locking position shown, for example with the aid of a flathead screwdriver, into the release position.

The contacting of the circuit board21with the pivot arm4is shown in detail inFIG. 7. The pivot arm4is pivotable about its pivot axis x. In the setting position shown inFIG. 7, the pivot arm4rests with its contact ridge13on an electrical contact12in the lamp base2. The contact12is connected electrically via a conductor path20to the circuit board21.

For further visualization of the contacting, a control cabinet lamp is shown schematically inFIG. 8, in which the first or the second attachment means6,7has contact claws23, via which the respective attachment means6,7electrically contacts the base on which the control cabinet lamp1is mounted. The pivot arm4is in electrical contact with the protective conductor11via a contact12and a conductor path20.

The control cabinet lamp1shown inFIG. 8has on opposing end faces26a plug connector16for the network connection and a modular plug connector24, via which the control cabinet lamp1can be connected in series to at least one other control cabinet lamp1or to a plurality of the control cabinet lamps1shown inFIG. 8. In particular, the plug connector16and the modular plug connector24can be formed identically. In the modular situation the direct contacting of the looped-through protective conductor shown inFIG. 8has the advantage that adequate equipotential bonding according to standard specifications is provided thereby, even if a plurality of the lamps shown inFIG. 1are connected in series, in particular if more than three of the control cabinet lamps1shown inFIG. 8, which each have a socket insert17, are connected in series.

The features of the invention disclosed in the present description, in the drawings and in the claims can be substantial for the realization of the invention both individually and in any combination.