Surgical light

Abstract

The invention relates to a surgical light (10) having multiple light sources (1) and at least one control unit (3) for controlling the light sources (1), the light sources (1) and the control unit (3) being arranged on a common base plate (2), the light sources (1) and the control unit (3) being arranged on opposite sides of the base plate (2).

Description

[0001] Operating light

[0002] The invention relates to an operating lamp with several light sources and at least one control unit for controlling the light sources, wherein the light sources and the control unit are arranged on a common base plate.

[0003] Such surgical lights are used to illuminate an operating field or a patient, at least in sections, for treatment purposes. The light sources and the control unit, which controls and regulates the light sources and thus also serves to regulate the power supply to the light sources, are often arranged on a common base plate, which thus serves as a kind of base plate or basic structure for the surgical light.

[0004] To ensure reliable illumination, the light sources must be sufficiently bright, which, however, also entails comparatively high heat generation both in the area of ​​the light sources and in the area of ​​the control unit. Accordingly, both the control unit and the light sources often generate large amounts of waste heat, which can lead to a sometimes drastic increase in temperature within the surgical light, especially during extended operation. If the temperature rises too much, the components may be damaged or the required illuminance may no longer be maintained, requiring the light sources to be dimmed, which then negatively impacts the illumination of the surgical field.

[0005] Based on this, the invention sets itself the task of specifying an operating lamp of the type mentioned at the beginning, which is characterized by improved heat dissipation.

[0006] This task is solved in an operating lamp of the type mentioned above by arranging the light sources and the control unit on opposite sides of the base plate.

[0007] By arranging the light sources and the control unit on opposite sides, a structural separation of the light sources and the control unit is achieved, so that heat production is distributed accordingly between different areas of the operating light. Although this division can cause the operating light as a whole to heat up, local hot spots that could lead to local overheating can be prevented or at least mitigated. It has proven advantageous to arrange the light sources on the front of the base plate and the control unit on the back of the base plate. The front of the base plate can face the patient or the operating table so that the light sources are directed towards the operating table and can illuminate it. Because the control unit is arranged on the back, it is not easily visible from the outside or from the patient's perspective.

[0008] With regard to the base plate, it has proven advantageous if it is essentially circular in shape. The base plate can be adapted to a housing or the geometric configuration of the housing and arranged within the housing. Furthermore, the base plate can have a central recess in the middle and thus be designed in the manner of a ring.

[0009] With regard to the design of the light sources, it has proven advantageous if a light source has several, in particular three, LEDs as well as reflectors assigned to the LEDs. The LEDs can be arranged such that their main radiation direction extends essentially parallel to the base plate. The light from the LEDs can be redirected via the reflectors and directed onto the operating table. The main radiation direction of the light sources can therefore be aligned essentially perpendicular to the base plate, although the light sources can also be arranged at an angle, in particular towards the center of the base plate. The light sources can ensure uniform illumination of the operating table.

[0010] With regard to the light sources, it has also proven advantageous if they are designed as light pods. Each light pod can have three LEDs and three, in particular bowl-shaped, reflectors, with each LED being assigned a reflector. The reflectors can be bowl-shaped or spherical segment-shaped. The light sources or light pods can have a substantially circular cross-section.

[0011] To ensure the most precise installation of the light sources on the base plate, it has proven advantageous if the base plate has mounting interfaces on the front for mounting the light sources. The mounting interfaces enable a clearly defined and therefore pre-determined installation of the light sources, so that subsequent alignment of the light sources during or after installation is no longer necessary. The mounting interfaces can be tilted or inclined depending on the position of the light sources on the base plate, thus resulting in optimal illumination of the operating field. The light sources advantageously enable a detachable connection of the light sources to the base plate. This has proven particularly advantageous for maintenance work or the replacement of individual light sources.

[0012] In this context, it has also proven advantageous for the base plate to have several concentrically arranged mounting rings, each of which has several mounting interfaces for the light sources. The mounting rings can ensure an even distribution of the light sources on the base plate. The mounting rings can be designed to protrude toward the front of the base plate, so that it can have a slight elevation compared to the other parts of the base plate.

[0013] Furthermore, it has proven advantageous if the base plate is designed in a step-like manner, so that the mounting interfaces are arranged in different mounting planes. For example, it can be provided that light sources that are arranged further inside, i.e. further towards the center of the base plate, are arranged on a different plane than light sources arranged further out. Depending on the position of the interfaces and in particular depending on the distance of the light sources from the center of the base plate, the inclination of the light sources can also vary. For example, light sources that are arranged further away from the center of the base plate can be arranged with a somewhat greater inclination towards the center of the base plate than light sources that are arranged more centrally.Furthermore, it is possible for light sources that are located further away from the center of the base plate to be offset backwards, i.e. towards the back of the base plate.

[0014] It has also proven advantageous if the mounting interfaces have holes extending through the base plate, which enable the light sources to be connected to the control unit. The light sources can be connected to the control units via the corresponding holes, if necessary via electrical conductors, so that both electrical energy and, if necessary, control signals can be supplied to the light sources from behind. By arranging the control unit on the back of the base plate, the light sources can also be contacted and controlled from behind, if necessary via electrical conductors. Advantageously, the conductors and the corresponding connections between the control unit and the light sources are not visible from the outside, i.e. from the direction of the operating table.

[0015] To achieve the most precise mounting of the light sources on the base plate, it has proven advantageous if the light sources are immovably connected to the base plate via the mounting interfaces. This design ensures simple installation, which no longer requires additional calibration or alignment of the light sources once the light source and base plate have been connected. However, in certain areas, subsequent adjustment may be advantageous or necessary, for example, if the light field needs to be slightly readjusted after installation. In this case, it is also possible to tilt or incline the light sources to a certain extent relative to the mounting interfaces or the base plate.

[0016] Furthermore, it has proven advantageous if several light sources are combined into a cluster. It is possible for five light sources to form a common cluster and for several clusters to be distributed, in particular rotationally symmetrically, across the base plate. A light source cluster can, for example, consist of four light sources arranged in a 2x2 matrix configuration and an additional light source arranged further inward in the radial direction next to the remaining four light sources. Six such light source clusters can be provided, so that a total of 30 light sources can be arranged on the base plate.

[0017] To improve heat dissipation, it has also proven advantageous if the control unit has a main control unit and at least one, in particular several, auxiliary control units that are structurally separate from the main control unit. The control unit need not be a single component, but rather can be divided into several individual units. This division can achieve an additional cooling effect and further improve heat dissipation, since the heat from the main control unit and the auxiliary control units is generated at different positions on the operating light, thus creating the most homogeneous temperature field possible. Hotspots and local heat build-up, which could lead to local overheating, can thus be prevented. The main control unit can be arranged in the center, and the auxiliary control units can be arranged around the main control unit like planets.The main control unit can therefore be designed as a central control unit and be positioned at essentially the same distance from the various auxiliary control units. This allows for the most even heat distribution possible. In practice, the use of one main control unit and three auxiliary control units has proven successful.

[0018] With regard to the main control unit, it has proven advantageous if it is connected to an operating unit. The brightness and / or color temperature of the various light sources can be controlled, particularly manually, via the operating unit. For this purpose, the operating unit can be designed as a rotary switch coupled to the main control unit, extending essentially perpendicular to the base plate, and located in the center of the base plate. Furthermore, the operating unit can also function as a handle, via which the surgical light can be moved, rotated, and pivoted manually.

[0019] To ensure communication between the main control unit and the secondary control unit(s), it has proven advantageous if the main control unit is connected to the secondary control unit(s) via electrical conductors. The secondary control units can thus be controlled via the main control unit, and thus indirectly control the light sources. The secondary control units can also be connected to each other via electrical conductors, for example. The main control unit and the secondary control units can be interconnected in a star topology.

[0020] According to an advantageous development of the invention, it is proposed that the base plate for the auxiliary control units have a mounting recess. A corresponding mounting recess prevents the auxiliary control unit from protruding beyond the contour of the base plate, which could potentially lead to damage to the auxiliary control unit during installation in a housing. The auxiliary control unit(s) can thus be arranged within the contour of the base plate, and the height of the auxiliary control units can be equal to or less than the depth of the mounting recesses. Advantageously, a separate mounting recess is provided for each auxiliary control unit.

[0021] For mounting the main control unit, it has proven advantageous if the base plate has a mounting bridge projecting toward the front for mounting the main control unit. The mounting direction can span the central recess of the base plate, allowing the main control unit to be arranged on the rear side of the mounting bridge. The operating unit can be arranged on the front side of the mounting bridge and coupled, in particular electrically, to the main control unit.

[0022] To control the light sources, it has proven advantageous if several light sources can be controlled via each auxiliary control unit. Each auxiliary control unit can be connected to several light sources and control them together. If the light sources are arranged in clusters, one or more light source clusters can be controlled via each auxiliary control unit. In practice, it has proven advantageous if one auxiliary control unit can control two clusters consisting of five light sources each, so that each auxiliary control unit is responsible for controlling ten light sources. The auxiliary control unit can be connected separately to each of the light sources it controls. However, it is also possible for the auxiliary control unit to be connected to several light sources together, if necessary via appropriate intermediate elements.This is particularly advantageous when not every light source needs to be controlled and regulated individually, but when the joint control and regulation of several light sources is sufficient.

[0023] With regard to the design of the control unit, it has proven advantageous if the main control unit and / or the secondary control unit(s) are designed as control boards. This design as control boards enables a flat overall height, so that the base plate with the mounted control units can be reliably arranged in the housing. The individual control units can be structurally separated from one another, so that each secondary control unit is located on a separate board. Accordingly, the board of the main control unit can also be independent of the boards of the secondary control unit(s).

[0024] According to an advantageous development of the invention, the base plate is made of a material with high thermal conductivity, in particular at least partially of aluminum. High thermal conductivity allows the heat from the control units as well as the heat from the light sources to be dissipated and distributed via the base plate. The heat can be transferred via the base plate to the housing and from there dissipated to the environment. High thermal conductivity also ensures that no hot spots occur, but that heat is distributed as evenly as possible across the entire base plate. The distributed heat introduction at various points on both the front and back and the high thermal conductivity of the base plate enable a particularly homogeneous temperature profile to be achieved.High thermal conductivity corresponds to a value of at least 100 W / m*K, preferably at least 150 W / m*K, particularly preferably at least 200 W / m*K. It has also proven advantageous if the heat generated by the control unit can be dissipated via the base plate. The base plate can thus function as a dissipation or heat sink for the control unit or the main control unit and the secondary control unit(s), thus ensuring reliable cooling and heat dissipation.

[0025] According to an advantageous development of the invention, it is proposed that, in order to improve heat transfer from the control unit to the base plate, a heat-conducting element, in particular a heat-conducting pad or heat-conducting paste, be arranged between the control unit, in particular the auxiliary control unit(s), and the base plate. The heat-conducting element or the heat-conducting pad or corresponding heat-conducting paste can ensure good contact and thus good heat transfer between the control unit or the auxiliary control unit(s) and the base plate. Each auxiliary control unit can be assigned its own heat-conducting element, thus ensuring the cooling of each auxiliary control unit and preventing heat buildup.

[0026] Although purely passive cooling of the operating light or the control unit and light sources may be sufficient with the measures described above, active cooling may also be provided. For this purpose, the operating light can be equipped, for example, with one or more fans that increase convection and thus cool the base plate. The coolers can ensure a, particularly continuous, airflow over the base plate, so that the heat absorbed by the base plate can be quickly dissipated.

[0027] With regard to the connection of the light sources and the control unit, it has proven advantageous if they are connected to each other via conductors, in particular electrical conductors. Each LED can thus be connected at least indirectly to a control unit, in particular a secondary control unit, and controlled via this.

[0028] To conceal the ladders from the outside, they can be mounted on the back of the base plate. The light sources and the base plate can thus obscure the view of the ladder from the outside or from the alignment of the operating table.

[0029] It has also proven advantageous to route the conductors through the base plate in the area of ​​the light sources to be controlled. The conductors can be routed along the back of the base plate and then only at the points where the light sources are located, through the base plate to the front of the light sources. This allows the light sources to be controlled from behind in an essentially invisible manner. To achieve the flattest possible design, the base plate can have recesses in the area of ​​the conductor feedthroughs. This allows the conductors to lie within the contour of the base plate and not protrude, meaning the conductors do not increase the installation space.

[0030] Furthermore, the conductors can be designed as conductor bridges, which enables the simplest possible installation. The conductors or conductor bridges can be mounted as pre-assembled or prepared units like plug-in connections on the back of the base plate and connected to the corresponding interfaces. The conductors can be angled at their ends for this purpose, in particular by 90 degrees. During assembly, the conductors then only need to be plugged into the base plate or into the control unit or the main control unit and / or the auxiliary control unit(s). In the assembled state, the conductors can then extend essentially parallel to the base plate, ensuring the flattest possible design. Furthermore, it has proven advantageous if the base plate is arranged in a housing that is open on one side.The housing can have a cup-shaped geometry with a substantially round cross-section, and the base plate can be adapted to the geometry of the housing so that there is little play between the housing and the base plate and the base plate is arranged as immobilely as possible within the housing. The base plate can be detachably connected to the housing, in particular screwed, which simplifies assembly and disassembly. In order to be able to move and pivot the operating light, the housing can be provided with a suspension. The suspension can be designed as a gimbal, via which the operating light can be easily moved and pivoted. To move the operating light accordingly, the housing can have handles, or the operating light can also be moved using the control element.

[0031] Furthermore, it has proven advantageous with regard to the housing if it is designed to be closable via a transparent front panel. The base plate and the light sources can be arranged behind the transparent front panel, so that the light from the light sources can first pass through the transparent front panel and then onto the patient or the operating table. The front panel can be adapted to the design of the housing or also to the design of the base plate. The front panel can be provided with a recess in the center so that the actuating element can extend vertically through the front panel and be operated manually from the outside.

[0032] Furthermore, it has proven advantageous if the heat generated by the control unit can be dissipated to the housing via the base plate. The base plate can be thermally coupled to the housing, allowing the heat from the control unit and the light sources to flow through the base plate into the housing and then dissipate into the environment.

[0033] It has also proven advantageous if the base plate is detachably mounted in the housing. This significantly simplifies the assembly of the base plate and the surgical light as a whole.

[0034] In this context, it has proven advantageous if the base plate has a number of support elements, in particular support bolts, on its front side, on which the base plate can be placed in an assembly position. In the assembly position, the back of the base plate and thus the control unit can be accessible. In the assembly position, the base plate, including the light sources and the control unit, can be rotated 180 degrees compared to its normal operating position. To move the base plate into the assembly position, the base plate can first be detached from the housing, then rotated 180 degrees, and finally placed upside down in the housing in the assembly position. To enable the base plate to be placed upside down in the housing, the base plate is advantageously designed symmetrically so that it still fits into the housing even after a 180 degree rotation.In the assembled position, the base plate rests on the support elements in the housing. Designing the support elements as support bolts has proven to be a simple design solution.

[0035] The support elements allow for easy installation of the control unit and cabling on the back of the base plate. Furthermore, the surgical light, or in particular the control unit, can be serviced in the installed position. This eliminates the need to lift the base plate out of the housing and then place or secure it in another position.

[0036] With regard to the support elements, it has also proven advantageous for them to protrude axially relative to the light sources. This protrusion allows the base plate, together with the light sources, to be placed on the support elements in the housing without damaging the light sources. The ends of the support elements therefore advantageously form the highest point.

[0037] With regard to the arrangement of the support elements, it has proven advantageous if they are arranged on the front side of the mounting recesses. Since the mounting recesses are already offset towards the front side of the base plate, the support elements can be comparatively short when arranged on the front side of the mounting recesses, allowing them to protrude axially relative to the light sources. This has also proven advantageous with regard to the stability of the support elements.

[0038] Furthermore, it has proven advantageous to provide at least three support elements evenly distributed across the base plate. With three support elements, the base plate does not wobble, even when mounted upside down in the housing, and at the same time, reliable support of the base plate on the support elements is ensured. It is advantageous if the support elements are evenly distributed across the base plate, resulting in a uniform distribution of force and pressure.

[0039] According to a further advantageous embodiment, it is proposed that the surgical light has at least one shading sensor for determining the shading of the object to be illuminated by emitting a signal, in particular electromagnetic radiation, and receiving a reflected signal, in particular electromagnetic radiation, wherein a diaphragm arranged in the signal path, in particular in the beam path, is provided for limiting both the emitted and the incident signals, in particular the electromagnetic radiation.

[0040] The shadowing sensors can be connected to the control unit and ensure that any shadowing can be at least partially compensated automatically by adjusting the light sources. Advantageously, several shadowing sensors are arranged at regular intervals between the light sources so that any shadowing or interfering objects between the light sources and the operating table that could cause shadowing can be reliably detected and then compensated.

[0041] Further details and advantages of the invention will be described in more detail below using an exemplary embodiment. In the following:

[0042] Fig. 1 shows a base plate with several light sources arranged thereon in a front view;

[0043] Fig. 2 shows the base plate as shown in Fig. 1 in a rear view;

[0044] Fig. 3 is an exploded view of various components of the surgical light in a perspective view of the front of the base plate; Fig. 4 is an exploded view as shown in Fig. 3, looking toward the rear of the base plate;

[0045] Fig. 5 shows an exploded view of an operating light with light sources mounted on the base plate;

[0046] Fig. 6 is an enlarged detailed view of the base plate as shown in Fig. 4;

[0047] Fig. 7 shows a base plate with light sources mounted thereon as shown in Fig. 1 in a perspective view.

[0048] The illustration in Fig. 5 initially shows an exploded view of an operating light 10. The operating light 10 essentially consists of a housing 7, a base plate 2 arranged in the housing 7, on the front side 2.1 of which a plurality of light sources 1 are arranged and on the rear side of which a control unit 3 for controlling the light sources 1 is provided (not shown in detail in the illustration in Fig. 5). Furthermore, the operating light 10 also comprises a transparent front plate 7.1, which covers the light sources 1 and thus prevents contaminants from entering the interior of the operating light 10. In the center of the front plate 7.1, there is also a control element 9, via which the housing 7 and thus also the base plate 2 and the light sources 1 can be moved back and forth by hand via the articulated suspension 8 in order to vary and move the light field on the operating table.

[0049] The design of the base plate 2 and the light sources 1 and control unit 3 arranged thereon will now be described in more detail with reference to the following figures. The illustration in Fig. 3 shows the front side 2.1 of the base plate 2 facing the operating table, together with a plurality of light sources 1 mounted on the front side 2.1 of the base plate 2, as well as the control unit 3 to be mounted on the rear side 2.2.

[0050] As can also be seen, the control unit 3 is divided into several sub-control units and this consists of a main control unit 3.1 to be mounted in the middle of the base plate 2 and three sub-control units 3.2 arranged like planets around the main control unit 3.1.

[0051] The light sources 1 arranged on the front side 2.1 of the base plate 2 are distributed across the base plate 2 to ensure the most uniform light field possible. Five light sources 1 are combined to form a light wave cluster. To enable the light sources 1 to be controlled via the control unit 3 or via the main control unit 3.1 and the auxiliary control units 3.2, several electrical conductors 4 are provided on the rear side 2.2 of the base plate 2, which can be seen particularly in the rear view of Fig. 2. The light sources 1 can be controlled via the auxiliary control units 3.2 via these conductors 4. Each auxiliary control unit 3.2 is responsible for controlling two light source clusters and thus a total of ten light sources 1. Furthermore, the auxiliary control units 3.2 are also connected to the main control unit 3.1 and to the neighboring auxiliary control units 3.2 via corresponding conductors.

[0052] Since both the light sources 1 and the individual control units 3.1, 3.2 can become very hot due to their power, particularly after extended periods of use, it is necessary to dissipate the heat produced from the housing 7 so that heat build-up, which could damage the components, does not occur. Firstly, by arranging the light sources 1 on the front 2.1 and the main control unit 3.1 and the auxiliary control units 3.2 on the rear 2.2 of the base plate 2, it can be achieved that the heat is introduced into the base plate 2 from both the front 2.1 and the rear 2.2. Furthermore, by distributing the light sources 1 and also splitting the control unit 3 between the main control unit 3.1 and the several auxiliary control units 3.2, it is achieved that the heat is distributed as evenly as possible into the base plate 2.

[0053] The base plate 2 is made of an aluminum alloy characterized by good thermal conductivity, resulting in a heat profile that is as homogeneous as possible within the surgical light 10 and the heat being distributed as evenly as possible across the entire base plate 2. These measures prevent the formation of local hotspots or heat buildup, which could lead to local damage to individual components.

[0054] As can be seen particularly in the illustration in Fig. 6, the base plate 2 has mounting recesses 2.4 on its rear side 2.2, in which the auxiliary control units 3.1 are arranged and connected to the base plate 2. Thanks to the mounting recesses 2.4, the auxiliary control units 3.2 do not protrude from the outer contour of the base plate 2, but rather are embedded in the base plate 2, resulting in a compact design. In order to achieve reliable heat dissipation of the heat produced by the auxiliary control units 3.2 via the base plate 2, the auxiliary control units 3.2 are not connected directly to the base plate 2, but rather a thermally conductive pad is provided between each auxiliary control unit 3.2 and the base plate 2, which improves the contact and thus the heat transfer between the respective auxiliary control unit 3.2 and the base plate 2.The thermal pad can thus ensure that the heat can be quickly transferred from the auxiliary control unit 3.2 to the base plate 2 and that the auxiliary control units 3.2 do not heat up too much.

[0055] In the middle, the base plate 2, which is generally ring-shaped, has a central recess 2.6 which is spanned by a mounting bridge 2.5, as is best seen in the illustration in Fig. 3. The mounting bridge 2.5 projects towards the front side 2.1 of the base plate 2, and the main control unit 3.1 is arranged on the rear side of the mounting bridge 2.5. Due to the projecting design of the mounting bridge 2.5, the operating element 9 can be arranged on the side of the mounting bridge 2.5 opposite the main control unit 3.1 and connected to the main control unit 3.1. Control signals can then be sent via the operating element 9 to the main control unit 3.1, which in turn can forward them to the secondary control units 3.2 for controlling the light sources 1.

[0056] The enlarged view of Fig. 6 shows the cabling in the form of numerous conductors 4 arranged on the rear side 2.2 of the base plate 2. The conductors 4 connect the individual auxiliary control units 3.2 to one another and also connect the auxiliary control units 3.2 to the light sources 1 assigned to the respective auxiliary control unit 3.2. As can also be seen from Fig. 6, the conductors 4 are designed like bridge-shaped plug-in connectors which, during assembly of the operating light 10, can be plugged into the corresponding interfaces on the rear side 2.2 of the base plate 2. For this purpose, the base plate 2 has feed-through recesses 2.7 on the rear side 2.2, which ensure that the conductors 4 do not protrude beyond the contour of the base plate 2. In order for the light sources 1 on the front side 2.1 of the base plate 2 can be controlled accordingly and connected to the conductors 4, these extend through the base plate 2 in the area of ​​the feedthrough recesses 2.7 and thus enable electrical connection to the auxiliary control units 3.2.

[0057] On the front side 2.1 of the base plate 2, the base plate 2 has a plurality of mounting interfaces 2.3 for the light sources 1. The mounting interfaces 2.3 enable the light sources 1 to be mounted in a fixed, defined position on the base plate 2, eliminating the need for subsequent adjustment of the light sources 1. As can be seen, for example, from Fig. 7, the light sources 1 do not all have to be arranged in the same plane or have the same orientation. In particular, the light sources 1 arranged further outwards can be arranged slightly inclined toward the center of the base plate 2 in order to slightly focus the light field.

[0058] The feedthroughs for the electrical connection of the light sources 1 with the control unit 3 or the auxiliary control units 3.2 are located in the area of ​​the mounting interfaces 2.3, so that only comparatively short electrical cables are required on the front side 2.1 of the base plate 2.

[0059] In addition to the light sources 1, shadowing sensors 6 are also provided on the front side 2.1 of the base plate 2. These are arranged between the light sources 1 or between the light source clusters. The shadowing sensors 6 can be used to identify interfering objects located between the light sources 1 and the operating table to be illuminated or the patient, which could therefore lead to shadowing of the patient. The shadowing sensors 6 are connected to the control unit 3 for this purpose, and if a corresponding interfering object is detected, the light sources 1 can be automatically controlled in such a way that the shadowing of some light sources 1 is compensated by the other, non-shadowed light sources 1, ensuring the most consistent, homogeneous light field possible. Furthermore, it can be seen that the shadowing sensors 6 are assigned a passive aperture 6.1, which can be used to improve the precision of the interference object detection.

[0060] To mount the various components on the base plate 2, for example, the front side 2.1 must be accessible for mounting the light sources 1, and the rear side 2.2 must be accessible for mounting the control unit 3 or the main control unit 3.1 and the auxiliary control units 3.2. To simplify the mounting of the control units 3.1, 3.2, the base plate 2 is equipped with three bolt-shaped support elements 5 on its front side 2.1. These support elements 5 are arranged in the outer area of ​​the base plate 2 on the front side of the mounting recesses 2.4 and protrude axially beyond the light sources 1.

[0061] For assembly, the light sources 1 can first be connected to the base plate 2 via the corresponding mounting interfaces 2.3. In the next step, the base plate 2 can then be turned over so that it rests on the support elements 5 and the rear side 2.2 is accessible. Since the support elements 5 are longer than the light sources 1, they are not damaged in the assembly position. In this assembly position, the components intended for the rear side 2.2 of the base plate 2 can then be mounted, in particular the main control unit 3.1, the secondary control units 3.2 and the cabling. Once the base plate 2 has been fully assembled, it can be turned over again and secured in the housing 7. Finally, the housing 7 is closed using the front plate 7.1.

[0062] The maintenance procedure is very similar. Base plate 2 can be removed from the

[0063] The housing 7 can be removed and then, thanks to the support bolts 5, placed in the assembly position and thus essentially upside down in the housing 7, so that the components arranged on the rear side 2.2 of the base plate 2 can be replaced or serviced. It is therefore not necessary to service or install the base plate 2 away from the housing 7.

[0064] Reference symbol:

[0065] 1 light source

[0066] 2 base plate

[0067] 2.1 Front

[0068] 2.2 Back

[0069] 2.3 Mounting interface

[0070] 2.4 Mounting recess

[0071] 2.5 Mounting bridge

[0072] 2.6 Central recess

[0073] 2.7 Implementation deepening

[0074] 3 Control unit

[0075] 3.1 Main control unit

[0076] 3.2 Auxiliary control unit

[0077] 4 conductors

[0078] 5 Uprising element

[0079] 6 Shading sensor

[0080] 6.1 Aperture

[0081] 7 housings

[0082] 7.1 Front panel

[0083] 8 Suspension

[0084] 9 Control element

[0085] 10 Operating light

Claims

Patent claims:

1. Operating light with a plurality of light sources (1) and at least one control unit (3) for controlling the light sources (1), wherein the light sources (1) and the control unit (3) are arranged on a common base plate (2), characterized in that the light sources (1) and the control unit (3) are arranged on opposite sides of the base plate (2).

2. Operating light according to claim 1, characterized in that the light sources (1) are arranged on the front side (2.1) of the base plate (2) and the control unit (3) is arranged on the back side (2.2) of the base plate (2).

3. Operating light according to one of claims 1 or 2, characterized in that the base plate (2) has mounting interfaces (2.3) on the front side (2.1) for mounting the light sources (1).

4. Operating light according to claim 3, characterized in that the light sources (1) are immovably connected to the base plate (2) via the mounting interfaces (2.3).

5. Operating light according to one of the preceding claims, characterized in that the control unit (3) has a main control unit (3.1) and a plurality of secondary control units (3.2) arranged structurally separately from the main control unit (3.1).

6. Operating light according to claim 5, characterized in that the main control unit (3.1) is arranged centrally and the secondary control units (3.2) are arranged around the main control unit (3.1).

7. Operating light according to one of claims 5 or 6, characterized in that the base plate (2.1) for the auxiliary control units (3.2) has a mounting recess (2.4).

8. Operating light according to one of claims 5 to 7, characterized in that the base plate (2) has a mounting bridge (2.5) projecting in the direction of the front side (2.1) for mounting the main control unit (3.1).

9. Operating light according to one of the preceding claims, characterized in that the base plate (2) consists of a material with a high thermal conductivity, in particular at least partially of aluminum.

10. Operating light according to one of the preceding claims, characterized in that heat produced by the control unit (3) can be dissipated via the base plate (2).

11. Operating light according to one of the preceding claims, characterized in that in order to improve the heat transfer from the control unit (3) to the base plate (2), a heat-conducting element, in particular a heat-conducting pad or heat-conducting paste, is arranged between the control unit (3), in particular the secondary control units (3.2), and the base plate (2).

12. Operating lamp according to one of the preceding claims, characterized in that the light sources (1) are connected via conductors (4) to the control unit (3), wherein the conductors (4) are arranged on the back of the base plate (2). Operating light according to one of the preceding claims, characterized in that the base plate (2) is arranged in a housing (2) and heat produced by the control unit (3) can be dissipated via the base plate (2) to the housing (7). Operating light according to one of the preceding claims or according to the preamble of patent claim 1, characterized in that the base plate (2) has on its front side (2.1) a plurality of support elements (5), in particular support bolts, on which the base plate (2) can be placed in an assembled position. Operating light according to claim 14, characterized in that the support elements (5) protrude in the axial direction relative to the light sources (1).

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