EP1741975B1 - Operating lamp - Google Patents

Description

The invention relates to a surgical light.

The term "operating light" here stands for a lamp that is suitable for medical applications. The surgical light according to the invention should thus be particularly suitable for illuminating a surgical field and, for example, for illuminating the oral cavity (dental light). Such surgical lights are also used for diagnostic and veterinary purposes.

The prior art knows surgical lights with halogen lamps, in particular gas discharge lamps, but also with LEDs (light emitting diodes). The latter have great advantages in terms of efficiency, lifetime, thermal properties and also in terms of compact design and the ability to adjust color temperatures.

WO 2005/059436 discloses a lighting device having a thermally conductive mounting means having a circular cross-sectionally shaped mounting surface extending perpendicular to the cross-sectional plane, and a plurality of LED modules slidably mounted on the mounting surface along slits extending in a circumferential direction of the circular segment, respectively , Each LED module consists of a seat acting as a heat sink with a rear side that is substantially complementary to the shape of the mounting surface, and a substantially flat front side, on which an LED socket with an LED is permanently mounted.

DE 195 05 925 discloses an operating light having an operating surface facing bottom, a discharge lamp, which is centrally located at the bottom in a rigid reflector for depth illumination, and a plurality of halogen incandescent lamps in bottom adjustable reflectors, which are arranged concentrically around the discharge lamp around.

WO 03/072994 discloses an operating light system having an ambient light fixture fixedly mounted to a ceiling and a plurality of light sources pivotally mounted at a distal end of a respective arm pivotally hinged and articulated to the fixture. Every light source has a rear reflector and a lighting fixture mounted therein in the reflector is adapted to generate a directional and focusable on a patient light distribution.

None of the aforementioned publications shows that an LED within a reflector for adjusting a light field is slidably disposed.

The present invention has for its object to provide a surgical light that offers the user a variety of ways of optimal light adjustment.

For this purpose, the invention provides an operating light with a housing in which a plurality of supports are supported, each carrying one or more reflectors, each of the reflectors containing at least one LED as a light source and wherein the carrier for adjusting the illumination of an operating field optionally relative to the housing are movable.

According to the invention, the LED is displaceably arranged within a reflector for setting a light field.

Thus, the invention enables the setting of different carriers, each supporting reflectors, independently in a comprehensive all carriers and reflectors housing. According to the invention, the housing may optionally remain stationary and only individual ones of the supports may optionally be relative to the housing be moved to change the angle of incidence of the radiation emitted by the reflectors of the respective moving carrier radiation in space. The individual carriers can be moved independently of each other in different ways. In a conventional manner, then the housing can be moved as a whole optionally also.

According to a first embodiment of the invention, the operating light on means by which an operator can perform the above-mentioned movements either by hand, so handles or the like on the carriers.

According to another embodiment of the invention, the operating light is provided with a plurality of electric motors, so that an operator can perform the above-mentioned movements optionally via an electronic control. It can also be combined according to another variant of the invention, the mechanical mobility by hand and the electrical mobility of individual carriers or the housing.

Preferably, the said supports are plate-shaped or formed in another flat structure and each carry a plurality of lights, which in turn are each provided with their own light sources, wherein a luminaire reflector of a plurality of reflector elements (for example, three reflector elements) may consist and each the reflector elements its own light source, as preferably an LED is assigned.

Particularly suitable for use in the surgical light according to the invention are LEDs with a club-shaped radiation characteristic, the main emission direction, ie the longitudinal axis of symmetry about which the lobe is rotationally symmetric, perpendicular to the optical axis of the luminaire.

A simple embodiment of the luminaire reflector provides that three or more reflector elements are arranged around the optical axis of the luminaire. These reflector elements complement each other to form a complete circle.

A further preferred embodiment of the invention provides that for setting a light field, in particular for adjusting the focus, the LEDs are arranged displaceably within a reflector, preferably parallel to the optical axis of the reflector.

By using LEDs a very long life of the lamp is achieved with low power consumption. Compared to halogen lights, the power consumption can be substantially halved with the same luminous power. The reduced power consumption also means that the lamp radiates less heat.

Also, the invention allows a particularly flat design of the entire lamp with high luminous power and thereby occupies little space in the operating room. In particular, the luminaire can be built so that an existing in the operating room air conditioning ceiling is not significantly disturbed by the operating light.

A particular embodiment of the invention provides for the combination of the surgical light with a camera, which is used for a navigation system. By integrating the camera with the operating light via a common support, the camera automatically always has the optimum position when the operating light is adjusted. Overall, the arrangement is space-saving and clear and it also confusing cable guides are avoided.

Another development of the invention provides that a sensor is integrated with the operating light or a system of a plurality of operating lights, which determines whether in an area in which usually a surgeon's head can appear (ie in the area between a surgical light and the surgical field, closer to the operating light), an object (for example the head of an operator) is located. Such shading of the surgical field by the surgeon himself is obviously highly undesirable because the lighting conditions in the surgical field change. With the said sensor, a system of several operating lights can then be controlled so that those lights that are not shaded, are operated with slightly higher power to ensure a total temporally uniform at the surgical site lighting. In this case, each individual operating light (or it can be summarized in each case some operating lights for this purpose) be equipped with a sensor of the type mentioned in order to determine whether this surgical light (or the combined group of operating lights) is shaded in the manner described. As sensors, for example, known IR sensors or the like come into consideration, as they are known in particular by photographic cameras, etc.

The use of LEDs makes it possible, in particular in a simple manner when the described shadowing occurs, to adjust the luminosity of individual luminaires.

Figur 1

schematisch einen Schnitt durch eine Leuchte mit drei Reflektorelementen;

Figur 2

eine Draufsicht auf eine Leuchte gemäß Figur 1 von vorne in Richtung der optischen Achse;

Figur 3

ein System aus mehreren Leuchten gemäß den Figuren 1 und 2;

Figur 4

einen Zentralschnitt eines Ausführungsbeispieles einer Operationsleuchte;

Figur 5

eine Seitenansicht der Operationsleuchte gemäß Figur 5;

Figur 6

eine Explosionsdarstellung von Komponenten einer Operationsleuchte gemäß den Figuren 4 und 5;

Figur 7

eine Ansicht einer Operationsleuchte gemäß den Figuren 4 bis 6 von oben;

Figur 8

eine Ansicht entsprechend Figur 7 mit abgenommenen Elektronikplatinen;

Figur 9

ein Detail aus einer Operationsleuchte gemäß den Figuren 4 bis 8, nämlich eine Trägerplatte mit mehreren Leuchten;

Figur 10

eine Ansicht des Details gemäß Figur 9 aus anderer Richtung;

Figur 11

eine Ansicht einer Operationsleuchte von unten, d.h. aus Richtung des beleuchteten Operationsfeldes.

Embodiments of the invention will be explained in more detail with reference to the drawing. It shows:

FIG. 1

schematically a section through a lamp with three reflector elements;

FIG. 2

a plan view of a lamp according to FIG. 1 from the front in the direction of the optical axis;

FIG. 3

a system of several lights according to the Figures 1 and 2 ;

FIG. 4

a central section of an embodiment of a surgical lamp;

FIG. 5

a side view of the surgical lamp according to FIG. 5 ;

FIG. 6

an exploded view of components of a surgical lamp according to the FIGS. 4 and 5 ;

FIG. 7

a view of a surgical lamp according to the FIGS. 4 to 6 from above;

FIG. 8

a view accordingly FIG. 7 with removed electronic boards;

FIG. 9

a detail from a surgical light according to the FIGS. 4 to 8 namely, a carrier plate with a plurality of lights;

FIG. 10

a view of the detail according to FIG. 9 from another direction;

FIG. 11

a view of a surgical light from below, ie from the direction of the illuminated surgical field.

FIG. 1 shows an embodiment of a lamp 10, which can serve as a single element for an operating light described in more detail below according to the invention. The operating light according to the invention is thus made of several lights in FIG. 1 (and FIG. 2 ) shown together.

FIG. 1 shows a section through the optical axis 18 of the lamp. FIG. 2 shows a view of this lamp from the front.

The lamp 10 includes three reflector elements 12, 14, 16, which join together substantially seamlessly to a completely closed reflector.

When using three reflector elements 12, 14, 16, the luminaire has 3-fold rotational symmetry about its optical axis 18.

Each of the reflector elements 12, 14, 16 has an LED 20a, 20b or 20c. The LEDs 20a, 20b, 20c are mounted on a base 22. Details of the electrical supply of the LEDs are not shown in detail. An electronic control (not shown) makes it possible to selectively control the individual LEDs. The LEDs 20a, 20b, 20c emit white light in the illustrated embodiment. In addition to those in the Figures 1 and 2 shown LEDs, other LEDs may be mounted with other emission colors (not shown), in particular LEDs that emit red, and / or LEDs that emit blue to selectively let the user set a desired color temperature can.

The individual LEDs are detachably fastened to the base 22 with screws 24. A common base plate 22 supports the reflectors 12, 14, 16, which are fastened by screws 28 to the base plate 26.

With screws 30, 32, the base 22 and the base plate 26 with the reflectors 12, 14, 16 are held together.

As FIG. 1 shows, the Hauptabstrahlrichtung 34 of the LED 20 is perpendicular to the optical axis 18 of the lamp. The reflector element is in accordance with in the illustrated embodiment in section FIG. 1 elliptical, so that the radiation, which is reflected by the reflector according to the main emission direction 34, leaves the luminaire parallel to the optical axis 18. By shifting the position of the LED 20 parallel to the optical axis 18, the angle at which the radiation leaves the luminaire can be adjusted. For this purpose, the screw 32 can be rotated to the base 22 with the LEDs 20a, 20b, 20c (see FIG. 2 ) to move axially.

As FIG. 2 shows, in this embodiment, the three reflector elements 12, 14, 15 housed in a housing 36. The LEDs 20a, 20b, 20c are each arranged in a plane containing the optical axis 18 and also the respective main emission directions 34a, 34b, 34c of the individual LEDs. So these three levels are in FIG. 2 perpendicular to the plane of the drawing in the direction of the illustrated main radiation directions 34a, 34b, 34c and thus divide the respective reflector element 12, 14, 16 so that it can be reflected in mirror symmetry at this level. The individual reflector elements are, as I said, in the section according to FIG. 1 ellipsoidal. In the circumferential direction (around the optical axis 18 around) they are each shell-shaped, depending on the emission characteristics of the LEDs designed so that the reflected radiation in a certain position of the LEDs along the optical axis leaves the lamp in parallel or in a desired manner.

FIG. 3 shows a ring 40 on which ten lights 10a, 10b, 10c, 10d, 10e, 10f, 10g and 10h are mounted at regular intervals. This system of lights 10a, ..., 10h allows optimal illumination of a surgical field, the individual lamps according to the embodiments according to the Figures 1 and 2 correspond. The individual luminaires can be optionally and independently adjusted so that their optical axes are optimally aligned to the surgical field.

In the ring 40, a camera for a navigation system used for the surgical procedure may be integrated (not shown).

Furthermore, in the ring 40, one or more sensors can be integrated, which determine whether there is an obstacle in the area between the system of lamps 10a,..., 10h and the surgical field, which leads to shading in the surgical field, for example the head of an operator. Such sensors are known in principle from the field of photographic cameras in principle. Determine that Sensor system such an obstacle and locates this sufficiently, then an electronic control that selectively controls the individual lights 10a, ...., 10h, not shaded lights with slightly more power to control than those lights that are more or less shadowed, to ensure a largely uniform illumination at the surgical site.

According to a first embodiment of the invention, in the surgical light according to FIG. 3 be provided for each of the individual reflectors 10a, 10b, ..., 10h, a separate carrier which is movably mounted with respect to the ring 40, so that the radiation angle of each of the individual lights are individually adjustable. The surgeon can therefore either both the entire ring 40 with all attached lights in the room for optimal illumination of the surgical field and he can also individually each of the lights 10a, 10b, ..., 10h individually move so that the respective Hauptabstrahlrichtung the Luminaire is adjustable in its solid angle. For movement, a handle may be provided on each of the lights (not shown), or electric motors and an electronic controller may be provided therefor. In an electronic control, the surgeon can see, for example, a replica of the surgical light on a control panel and it can be provided controls for moving each individual light 10a, ..., 10h, for example in the form of a stylus (so-called joy stick). In the latter case, the light then follows the movement of the joy stick.

The FIGS. 4 to 11 show a further embodiment of a surgical light.

The surgical light has a housing 50 in which a plurality of individual lights 10 are housed, in the present case thirty lights 10. Each of the lights 10 can like that in the Figures 1 and 2 be described embodiment described.

Each of the luminaires 10 thus has, in this embodiment, three reflector elements 12, 14, 16, to each of which an LED 20a, 20b, 20c is assigned.

In the illustrated embodiment according to the FIGS. 4 to 11 For example, five lights 10 each are mounted on one of the support plates 52a, 52b, 52c, 52d, 52e, 52f.

The carrier plates are preferably made of a material with high thermal conductivity, such as aluminum or an aluminum foam.

Each support plate is individually movable relative to the housing 50 via a respective associated pivoting mechanism 54a, 54b, 54c, 54d, 54e, 54f. The electrical supply of the lights arranged on a carrier plate takes place via separate electronic boards 56a, 56b, 56c, 56d, 56e, 56f.

The LEDs of each of the lights of a particular carrier plate are operated with the electronic board associated with this carrier plate and a respective control electronics. The modules communicate with each other with a CAN-BUS system. In this case, the individual control electronics, which are assigned to the individual carrier plates, operate independently of each other, so that a defect of one unit does not lead to the failure of the other units.

Thus, the carrier plates and the electronic boards each form compact units, which are easily accessible for maintenance and repair work. The arrangement of the carrier plates and electronic boards also allows a good supply of air and thus cooling to the heat-generating areas of the operating light, so the LEDs and the reflector elements. To promote the cooling of each individual carrier plate with electronic board each have a fan 72 assigned.

The radiation exits the housing 50 via an exit window 58. The entire housing 50 with the components contained therein is suspended by a suspension 60 in a conventional manner freely movable in space. To the Example, the mobility can be given around two mutually perpendicular axis.

The ratio of the light exit surface given by the exit window 58 to the entire housing surface should be as large as possible, i. based on the total surface of the housing, the light exit surface should make up the largest possible percentage. Here it is envisaged that the light exit surface accounts for at least 37% of the total surface area. Preference is given to a value of 40%, even more preferred is a value of 50% or more.

The pivot mechanism 54a, 54b, 54c, 54d, 54e, 54f allows free rotation and pivoting of each individual carrier plate with respect to the housing. For example, the pivot mechanism may comprise a ball joint or also a rotatable about two mutually perpendicular axes, or a gimbal.

For the movement of each individual carrier plate, either a handle (not shown) may be provided on each carrier plate or an electric motor (not shown).

The housing 50 is moved in total via a handle 64 in space translational and / or rotational. Also via a handle ring 70, the housing can be moved.

The FIG. 7 shows the view of the operating light from above, with a cover is removed. As shown, the six electronic boards 56a, ..., 56f leave sufficient room for the air flow rate that is delivered by the fans 72.

at FIG. 8 the electronic boards are removed so that the support plates 52a, ..., 52f are clearly visible. As shown, the carrier plates are as far as possible provided with recesses for promoting the passage of air. Only where the support plates fulfill their function and support the individual lights 10, they are plate-shaped. The individual approximately circular solid plate sections are connected to each other via webs.

FIG. 9 shows in perspective a single support plate 52a with five fixtures 10 attached thereto.

FIG. 10 shows this arrangement from the opposite direction.

FIG. 11 shows the operating light in the fully assembled state from the bottom, ie from the direction of the illuminated surgical field. As shown, the individual luminaires 10 with their reflector elements 12, 14, 16 result in a quasi-continuous honeycomb structure. As far as gaps are given between the edges of the reflector elements, they are kept so large that a sufficient air passage is possible, but as small as possible in order to achieve the most effective lighting field.

Claims (4)

1. Lamp for an operating theatre comprising a housing (50) in which a plurality of carriers (52a, 52b, 52c, 52d, 52e, 52f) are supported, each of which carrying one or more reflectors (12, 14, 16), wherein each of the reflectors comprises at least one LED as a light source and wherein the carriers (52a, 52b, 52c, 52d, 52e, 52f) are optionally movable relative to the housing (50) for adjusting the illumination of an operating field, characterized in that the LED (20a) is displaceably arranged within a reflector for adjusting a light field.
2. Lamp for an operating theatre according to claim 1, comprising a suspension means (60) for optional movement of the housing (50).
3. Lamp for an operating theatre according to any one of claims 1 or 2, characterized in that the carriers (52a, 52b, 52c, 52d, 52e, 52f) are each provided with an electronics board (68a, 68b, 68c, 68d, 68e, 68f).
4. Lamp for an operating theatre according to any one of the preceding claims, wherein the light emitting area is at least 40 % of the entire surface of the housing.

Images