IT201900003523A1 - LED surgical lamp - Google Patents

Description

DESCRIPTION of the invention entitled:

"LED surgical lamp"

Field of the invention

The present invention relates to a LED operating light, suitable for use in medical or surgical applications, to illuminate the operative areas.

Prior art known

In the field of dental / oral surgery, in order to illuminate the operating area, the use of particular lamps, defined as scialitic, is known, suitable for providing complete visibility of the operating area for the entire duration of the intervention, as the light sources of these lamps, which project light on the area to be illuminated, are arranged and oriented in such a way as to minimize the presence of shadows, projected for example by the instruments used, by the hand or head of the surgeon or dentist, which stand between the lamp and the area to be illuminated.

The illuminated area must meet some basic requirements, to allow the operator to have good visibility during the entire duration of the intervention. This area must comply with specific regulations, for example CE - EN - 9680, which specifies the requirements and test methods for lamps used in dental offices and intended to illuminate the oral cavity of patients. The standard also provides specifications for the manufacturer's instructions for use, packaging and marking.

The area illuminated by surgical lamps for dental or oral surgery applications is typically rectangular or elliptical in shape, with light intensity of the indicative order between 30klux and 60klux, with a sharp and well-defined edge gradient.

In the particular field of dental / oral surgery, the operating field or operative area coincides with the area of the mouth, therefore a fundamental requirement that the operating light used must respect is that of not dazzling and damaging the patient's eyes.

The operating lamps used in this particular area must meet other specific requirements, for example they must have color yields higher than 95CRI and with color temperatures between 3000K and 6000K, and must be able to operate by activating a filtering mode of certain wavelengths, when, for example, some reconstruction resins are used which would activate and polymerize faster if irradiated with these specific wavelengths of light.

Typically, the light sources used for these operating lamps are LED sources, mounted individually or in groups, and whose intensity is adjustable according to the specific characteristics of the desired illuminated area.

It should be immediately noted that with the expressions "LED source", or simply "LED", here and in the following we want to indicate at least one light source that uses LED technology (light emitting diode - light emitting diodes) for the emission of light radiation. In particular, it should be noted that, as known in the art, the light emitting diodes can be arranged on a module or card which is conventionally indicated in the sector with "LED card". The term LED board will be used here and hereinafter to indicate at least one light source, and therefore one or more light emitting diodes and the relative support or module. Obviously LEDs of a type known in the art can be used in the lamp according to the present invention.

Typically a lamp with a surgical effect is obtained by differentiating and multiplying the number of LED light sources present on the lamp, through a direct or indirect mode.

In direct mode, the light emitted by the LEDs is cut to obtain an operating area that has the desired geometric shape, and is sent to the focus, i.e. the operating area, passing through lenses that allow it to be focused, avoiding reflection on elements. intermediate.

In indirect mode, on the other hand, the light emitted by the LED sources is reflected by one or more reflecting elements, typically of parabolic shape, in such a way as to generate an operating area that has the desired geometric shape and intensity.

Both types of known operating lamps have some disadvantages. A first problem consists in the fact that such lamps have electronic and / or electrical components which are built integrally with the body of the lamp. Therefore, in the event of replacement of faulty electrical and / or electronic components, such as the LED board or the control board, it is necessary to fully open the support where the electronic components of the lamp are integrated, which is typically a delicate operation and complex and must be carried out by skilled labor.

A second problem consists in the fact that the operation of filtering the radiation emitted by the LED sources when you want to slow down the polymerization of some resins used during the intervention, is often complex.

A further problem is that known operating lamps often have systems for dissipating the heat developed by the LED sources which are large and have a high cost.

Further problems are the complexity and manufacturing costs of the known lamps. Consequently, a surgical light is required that allows easy replacement of electrical / electronic components. A surgical lamp is also required that allows a simple and effective filtering of certain wavelengths. Furthermore, there is a need for a surgical lamp which has a good dissipation of the heat generated by the LED sources and which has low production costs.

Summary of the invention

An object of the present invention is to provide a surgical lamp which allows the above mentioned drawbacks to be overcome. One purpose of the invention is to provide a surgical lamp that allows easy replacement of electrical / electronic components. A further purpose is to provide a surgical lamp that allows a simple and effective filtering operation of certain wavelengths.

A further purpose of the invention is to provide a surgical lamp which has a good dissipation of the heat generated by the LED sources and which has low production costs.

These and other objects are achieved by means of a surgical lamp according to claim 1, which comprises

- at least one light source of the LED type, preferably a plurality of LED sources, preferably a LED board or LED module, on which one or more light emitting diodes are arranged;

- at least one collimating lens for the emitted light radiation;

- a support element for housing the at least one LED source;

- at least a first reflector having a reflecting surface, preferably having a substantially convex shape;

- at least a second reflector having a substantially concave shape, the concavity of which defines an internal volume, and having a concave reflecting surface, said second reflector comprising at least one passage for the light radiation emitted by the at least one LED source, preferably a plurality of passages, and wherein the reflecting surface of the first reflector faces the concave reflecting surface of the second reflector.

It should be immediately noted that the term passage for the light radiation emitted by the at least one LED source, here and in the following, is meant to be at least an opening made on the second reflector in such a way that the light radiation emitted by the source passes through the opening and therefore through the second reflector, is the embodiment in which the perimeter / peripheral edge of the second reflector is shaped in such a way as to allow the passage of the light radiation emitted by the LED source so as to reach the first reflector, for example the perimeter edge can be shaped in such a way as to include a loop along the perimeter of the second reflector.

According to one aspect, the passage is made in the form of at least one opening passing through the second reflector. Preferably, the at least one passage and in particular at least one opening is placed in correspondence with a central area of the second reflector.

According to an aspect of the present invention, the at least one LED source is substantially located in correspondence with the passage of the second reflector and the light radiation emitted by the at least one LED source passing through this passage is reflected by the reflecting surface of the first reflector towards the concave surface of the second reflector and is subsequently reflected by the concave reflective surface of the second reflector to illuminate an operating area.

According to one aspect, the reflecting surface of said at least one first reflector is at least partly convex.

As mentioned, according to one aspect, the operating lamp comprises at least one lens, preferably biconvex for collimating the radiation emitted by the at least one LED source.

An advantage of this aspect is the possibility of effectively collimating the radiation emitted by the at least one LED source in such a way that it affects the first convex reflector in the form of substantially flat, substantially parallel and collimated beams.

According to a further aspect, the first reflector is positioned relative to the second reflector, for example by means of suitable connection means, at a predetermined distance. According to possible embodiments, the connection means can comprise at least one arm or similar element on which the first reflector and / or at least one transparent screen supporting the first reflector is placed.

Advantageously, the arrangement of the first reflector with respect to the second reflector allows to optimize the focus of the radiation, obtaining optimal illumination of the operating area.

According to a further aspect of the invention, the at least one LED source is substantially placed in correspondence with the at least one passage of the second reflector, in a point of the space set back from this passage, and external to the volume defined by the concavity of the second reflector.

Advantageously, such a configuration allows to position the LED board (and therefore the LED sources arranged on it) in the rear part of the lamp, in a position outside the volume defined by the reflecting surface of the second reflector, so as to be able to perform quickly and simple maintenance and / or installation and removal of the at least one LED source.

As will be seen better below, according to a possible embodiment, the support element for housing at least one LED source, or LED board, is fixed to the external part of the second reflector, so as to allow the simple and rapid removal of the support element of the at least one LED source.

According to a possible embodiment, the support element comprises at least a portion covering the rear part of the operating light.

According to an aspect of the invention, the support element comprises at least one cavity, preferably a plurality of cavities, for housing the at least one LED source, or the LED board.

Furthermore, according to one aspect, the lamp according to the invention allows the integration of a plurality of LEDs and of the relative electronic boards on the support element, which is positioned in the rear part of the lamp, which is easily accessible for an operation. replacement or maintenance, for example by removing a cover flap. In fact, according to possible embodiments, the supporting element of the at least one LED source can be made in such a way as to constitute a structural element of the lamp, so that other components of the lamp itself, such as for example control board and / or the second reflector can be connected to the support element which can therefore also perform a structural function.

According to a further aspect, the support element is fixed to the convex outer surface of the second reflector by means of fixing means, and in such a way that the at least one LED source is aligned with the at least one passage, so as to allow the crossing of the light radiation emitted through the passage with which the second reflector is equipped, towards the reflection surface of the first reflector.

Advantageously, such a configuration allows to selectively guide the beams of collimated light, emitted by the LED sources and passing through said at least one lens, towards the first reflector.

According to one aspect, the support element is releasably linked to the rear part of the surgical light, in particular to the external part of the second reflector, by means of connection, so that the at least one cavity present in the housing portion is aligned with the at least one passage of the second reflector.

Advantageously, such a configuration also allows the simple and rapid removal of the element in which the at least one LED source is housed. According to a further aspect, the concave reflecting surface of the second reflector comprises a plurality of reflecting elements in such a way as to create a faceted surface.

Advantageously, thanks to the presence of such a plurality of reflecting elements, the open beams which are directed by the first reflector, preferably convex, towards the concave reflecting surface of the second reflector, are each reflected in turn, preferably illuminating the entire operating area to be illuminated, thus obtaining an amplification of the scialytic effect.

According to an aspect of the invention, the second reflector has a substantially parabolic shape, preferably has a substantially paraboloid shape.

According to an aspect of the invention, the lamp comprises at least one filter, preferably this filter comprising at least one colored transparent element, for filtering at least one wavelength or an interval of wavelengths of the light radiation emitted by the at least one LED source .

This filter can be positioned, according to an aspect of the invention, between the at least one LED source and the at least one passage of the second reflector.

This filter can be positioned, according to an aspect of the invention, between the at least one lens, preferably biconvex, and the at least one passage for the light radiation emitted by the at least one LED source.

Advantageously, such a filter allows the filtering of some wavelengths, for example an orange color filter can be used to filter specific wavelengths of light that activate the polymerization of, for example, a resin used in the dental field, but it can be also used a different color filter, such as yellow, blue or green, to filter out other wavelengths of light, depending on the application.

According to a further aspect, this filter is movable between at least a first position in which this filter does not interfere with the light radiation emitted by the at least one LED source and a second position in which this filter interferes with at least part of the radiation emitted by the at least one source LED.

According to one aspect, the at least one filter is movable at least partially in rotation or translation, or a combination thereof, between said first position and said second position.

According to a further aspect, the filter is movable by means of actuation means which allow at least partial translation and / or rotation of the filter with respect to the support element of the at least one LED source, preferably between at least said first position in which the filter does not interfere. with the light radiation emitted by the at least one LED source and said second position in which the filter interferes with at least part of the light radiation emitted by the at least one LED source.

Advantageously, such a configuration allows not to filter or filter, selectively, at the discretion of the operator, some wavelengths of light.

According to one aspect, the support element for housing the at least one LED source can house the relative card (LED card) supporting the light emitting diodes, a relative control card and the related electronic components.

According to a further aspect, the support element for housing the at least one LED source can also comprise a radiator for dissipating the heat developed by the electronic control components of the LED source, or by the LED board. Advantageously, this configuration allows the heat generated by the LED board to be dissipated towards the outside of the lamp.

Description of the figures

Further characteristics and advantages of the present invention will become more evident from the following description, made by way of example with reference to the attached figures, in which:

- Figure 1 is a schematic sectional view of the lamp according to the invention in a possible embodiment, in which the paths of the light rays emitted by an LED source are schematically seen, reaching an operating area to be illuminated;

- Figure 1a is a detailed perspective view of a possible embodiment of the support element for the at least one LED source; - Figure 1b is a detailed perspective view of a possible embodiment of the support element equipped with connection portions to other components of the lamp, constituting a structural element of the lamp itself;

- Figure 2a is a perspective front view of a possible embodiment of the surgical lamp according to the invention;

- Figure 2b is a perspective front view of a further possible embodiment of the surgical lamp according to the invention, shown without connection means between the first and the second reflector;

Figure 3 is a perspective view from the rear of the surgical light of Figure 2;

- Figure 4 is an exploded perspective front view of the invention in a possible embodiment;

- Figure 5a is a cross section in the middle of the invention according to an embodiment;

- figure 5b is a cross section displaced from the center line and passing through an LED;

- Figure 6a is a detailed front perspective view according to an embodiment of the invention in which the filters are shown in the position in which they do not interfere with the emitted light radiation;

- Figure 6b is a detailed front view according to an embodiment of the invention in which the filters are shown in the position in which they interfere with the emitted light radiation.

Detailed description

With reference to the attached figures, some possible embodiments of the lamp 1 according to the present invention will be described.

The present invention can, however, be implemented in many different forms and should not be construed as being limited to those described below; rather, these embodiments are provided in such a way that this description is complete and fully comprehensible to those skilled in the art with exemplary and non-limiting reference to the accompanying figures.

A LED operating lamp 1 according to the invention comprises at least one LED source for the emission of light radiation 11 (for example schematically visible in Figure 1) intended to illuminate an operating area 100. According to a preferred embodiment, such as for example shown in the attached figures, the lamp 1 comprises a plurality of LED sources 10a, 10b, 10c, 10d, 10e, 10f. It should be noted that the lamp can be equipped with a casing 44 (visible for example in figures 2a, 2b, 3, 4) which allows you to define the desired external shape and which allows you to house the various components that will be described below. details below.

The LED sources 10a, 10b, 10c, 10d, 10e, 10f, as mentioned, can be arranged on a module or layer to form a so-called LED board 10, for example visible in Figures 1, 4. The at least one LED source can emit white light at a color temperature of 4500 K.

In one embodiment the LED sources 10a, 10b, 10c, 10d, 10e, 10f can emit white light of different color temperature.

According to one aspect, the single LEDs can emit white light of different color temperatures, for example the LED sources 10a, 10c, 10e emit white light at the temperature of 3000 K, while the LED sources 10b, 10d, 10f emit white light at the temperature of 6000 K. In a further embodiment, the LED sources 10a, 10b, 10c, 10d, 10e, 10f can emit light radiations having different wavelengths, and therefore emit light of different colors.

According to one aspect, the individual LEDs can emit light of different colors, for example the LED sources 10a, 10c, 10e emit white light at a temperature of 6000 K, while the LED sources 10b, 10d, 10f emit yellow, amber or red light (and therefore they emit light having a wavelength corresponding respectively to the colors yellow, amber or red).

According to one aspect, the single LEDs can emit white light of different color temperatures and different colors, for example the LED sources 10a, 10c emit white light at the temperature of 3000 K, the LED sources 10b, 10d emit white light at the temperature of 6000 K, the LED sources 10e, 10f emit yellow light.

The light radiation emitted by the LED sources of the lamp, for example according to the combinations indicated above, by way of non-limiting example, can be mixed together.

In general, it should be noted that according to an aspect of the present invention, LED sources having different spectro-photometric characteristics, for example LED sources that emit white light of different color temperatures and / or LED sources emit light radiations having different lengths of waves corresponding to light of different colors, preferably yellow or amber or red, can be mixed together, preferably in an adjustable way by an operator.

According to one aspect, the regulation of the intensity of the light radiation emitted by the lamp takes place through the regulation of the intensity of the light radiation emitted by at least one first LED source and at least one second LED source, having different spectro-photometric characteristics.

In particular, according to one aspect, the lamp is controlled or by adjusting the intensity of the radiations emitted by at least a first LED source and by at least a second LED source in an inversely dependent manner on each other, increasing the intensity of the emitted light radiation. by the at least one first LED source as the intensity of the light radiation emitted by the at least one second source decreases and vice versa, by adjusting the voltage of the electric current and / or the intensity of the electric current supplied to the operating lamp.

In other words, the increase in the intensity of the first source corresponds to a decrease in the intensity of the second source, and vice versa.

Advantageously, such a configuration allows a simple and effective adjustment operation of the spectro-photometric characteristics of the emitted light radiation.

The lamp 1 also comprises at least one support element 40, visible for example in Figures 1a and 1b, for housing the at least one LED source 10a, 10b, 10c, 10d, 10e, 10f, and in particular for supporting at least one card LED 10.

According to an embodiment shown in Figure 1a, in accordance with the present invention, this support element 40 has a shape that allows the housing of the LED source (s) and in particular of an LED board in its rear portion 40b. Furthermore, as will be described in more detail below, the support element 40 can comprise one or more cavities 41, 41a, 41b, 41c, 41d, 41e, 41f, or seats, to house one or more respective lenses 60.

As will be seen better below, the support element 40 is preferably fixed in a removable way to the lamp 1.

According to an embodiment, the support element 40 comprises at least one cavity and in general a seat or housing portion 40b for housing at least one LED source.

In a possible embodiment, the housing portion 40b has a substantially parallelepiped shape, but different shapes in accordance with the present invention but not shown in the figure are not excluded, such as to allow the housing of the LED source (s) of the lamp , and in particular of the LED board 10.

According to one aspect, such as visible in figure 1b, the support element 40 can be a structural element of the lamp and can for example comprise one or more connecting portions 40.1 - 40.4 to other components of the lamp.

For example, as can be seen in Figure 1b, the support element 40 can comprise one or more projecting arms 40.1, 40.2 (in the embodiment shown in Figure 1b there are two arms) intended for connection with a bow 70, or similar element , useful for making the lamp 1 orientable with respect to a support arm (not shown), so that it can be quickly oriented. The arch 70 can be rotatably connected, through a hinge type constraint, to the arms 40.1 and 40.2 of the support element 40.

The arm or arms 40.1, 40.2 of the support element 40 can be made in a single piece with the support element, or be linked to the support element 40.

According to a possible embodiment such as for example visible in Figures 1, 1b, 5a, 5b, the support element 40 can also comprise at least a connection portion having the shape of a perforated plate 40.3, 40.4 intended for connection with a component of the lamp and in particular with the second reflector 30. In other words, according to a possible embodiment, the second reflector 30 can be fastened to the support element, which therefore acts as a structural element of the lamp, by means of one or more connection portions 40.3, 40.4.

One or more connecting portions 40.3, 40.4 of the support element can be used to also support the control unit or control board 56 of the LED sources, as for example in the embodiment shown in the attached figures in which the unit control 56 is arranged on the connecting portion 40.4 of the support element 40 (see Figures 5b and 5a).

Furthermore, it should be noted that, even if not visible in the attached figures, knobs or similar elements can be provided to the arch 70 or to the side portions 71, 72 projecting from the lamp housing 44, suitable for being gripped by an operator to orient the lamp. 1 with respect to a support arm (not shown in the figure), which can be connected for example to the central portion of the arch 70, so that it can be quickly oriented.

Furthermore, preferably, the support element 40 is arranged in the rear part of the lamp in such a way as to be easily accessible from the outside.

According to an aspect of the invention, the support element 40 is constrained to the lamp 1 so that it can be quickly installed / removed, as well as in such a way as to be easily accessible from the outside, for example for the purpose of facilitating an operation. revision / maintenance of the same.

In one embodiment, the support element 40 is arranged inside the casing 44, which therefore houses both the element 40 and the second reflector 30. This casing 44 can obviously be provided with an access opening and a removable cover 43, in such a way as to allow access to the LED board 10 and to the other electrical components which are housed on the support element 40. This opening of the casing 44 can be closed by a cover 43 which allows access to the inside the crankcase.

In one embodiment, the support element 40 and the casing 44 can be obtained in one piece, thus constituting a single part (a single piece).

In an embodiment according to the invention, the door (or lid) 43 is fixed in a removable manner to the support element by means of suitable connection means not shown.

According to an embodiment, for example shown in Figure 2a, 2b, 3, 4, in accordance with the present invention, this support element 40 comprises at least a cover portion 43, or lid, for closing the rear part of the lamp surgery 1.

As mentioned, in one embodiment the support element 40 can house at least one board for the LEDs, a relative control board 56 and the related electronic components.

In particular, the at least one card dedicated to supporting the at least one LED source 10a, 10b, 10c, 10d, 10e, 10f is housed in a seat or cavity 40b of the support element 40, accessible by removing the door or cover 43 of the support element 40 or of the casing 44.

Said seat or cavity 40b for housing the light sources, for example of a LED board 10, is placed according to an embodiment in the rear part of the support element 40, i.e. the opposite part with respect to that facing in use towards the second reflector 30 and on which, as will be seen better in the following, seats or cavities 41 passing through for housing at least one collimation lens 60 for the emitted radiation can be arranged.

The support element 40 can be in plastic and / or composite and / or metal and / or ceramic material, preferably in thermoplastic material possibly reinforced and / or loaded and / or with additives.

The lamp 1 according to the invention further comprises at least a first reflector 20 having a reflecting surface 21, preferably of a substantially convex shape and at least a second reflector 30 of a substantially concave shape, the concavity of which defines a volume 33, and having a reflecting concave surface 31.

In one embodiment, the support element 40 and the second reflector 30 can be obtained in one piece, thus constituting a single part (a single piece). The external part of the second reflector 30, ie the one located outside the volume 33 defined by the concavity, therefore has a convex external surface 36.

The second reflector 30 comprises at least one passage 32, preferably realized as at least one through opening of the second reflector 30. However, other embodiments are not excluded in which the passage is realized as a slot along the perimeter of the second reflector 30.

Preferably, as for example visible in the figures, the at least one passage and preferably the at least one opening is placed in a preferably central area 34 of the same. In one embodiment, the second reflector 30 has a substantially parabolic shape, preferably a paraboloid, with a perimeter edge 38.

It should be noted that here and in the following, the expression central area 34 is used to indicate the region 34 of the second reflector 30, which extends around the point belonging to said second reflector 30, which is the point furthest from the plane or aperture surface 39 of the second reflector, this point being measured along an axis perpendicular to said aperture plane 39 (see for example the distance L1 in Figures 1, 5a, 5b).

As for example visible in Figures 1, 5a, 5b, the opening plane 39 of the second reflector 30 is defined in the present description as the plane, or the surface tangent to at least part of the perimeter edge 38 of the second reflector 30. In this case, the edge occurs with a trend not lying on a plane it refers not to the plane but to the relative surface passing through the edge.

In an embodiment in accordance with the invention, for example visible in figures 2a, 2b, 4, the reflecting surface 31 of the second reflector 30 covers an area greater than that covered by the reflecting surface 21 of the first reflector 20.

According to an aspect of the invention, the convex reflecting surface 21 of the first reflector faces the concave reflecting surface 31 of the second reflector 30, in particular according to a possible embodiment, for example visible in Figures 1, 2a, 2b, 4 the surface convex reflector 21 of the first reflector 20 and the concave reflecting surface of the second reflector 30 are arranged facing each other and spaced apart along an axis of the surgical lamp, passing through an LED source and a point of the illuminated area.

The at least one LED source 10a, 10b, 10c, 10d, 10e, 10f of the surgical lamp according to the invention is substantially located in correspondence with the passage 32, where the word "substantially in correspondence" indicates both that the at least one source LED is placed in such a way that its light passes at least in part this passage, whether the LED source is placed outside the passage (near it).

In both cases, the arrangement of the LED source and the aperture is such that the light radiation 11 emitted by the at least one LED source passes through the at least one passage 32 and is reflected by the reflecting surface 21 of the first reflector 20 towards the surface concave reflector 31 of the second reflector 30 and is subsequently reflected by the concave reflective surface 31 of the second reflector 30 to illuminate an operating area 100, preferably rectangular, elliptical or round in shape.

According to an embodiment, the operating light comprises at least one lens 60, preferably biconvex, placed in proximity to the at least one LED source 10a, 10b, 10c, 10d, 10e, 10f, able to collimate the light radiation emitted by the at least one LED source 10a, 10b, 10c, 10d, 10e, 10f to guide it, in the form of at least one substantially collimated beam, preferably of a plurality of substantially flat, parallel and collimated beams, through the at least one passage 32 of the second reflector 30.

It should be noted that according to a possible embodiment, the at least one lens 60 is arranged on the LED board 10.

According to a further possible embodiment, the at least one lens 60 can be made integrally with the support element 40, for example according to this possible embodiment the support element is made at least in part in transparent material.

The at least one passage 32, and preferably said through opening of the second reflector, can have a circular shape, as shown in the embodiment of figure 1, 2a, 2b or 4, but other geometries such as square, rectangular or elliptical.

In a possible embodiment according to the invention, for example shown in figures 2a, 2b, the first reflector 20 is connected to the second reflector 30 in such a way that the first reflector 20 is placed in a position substantially facing the at least one passage 32.

More in detail, according to a possible embodiment, the first reflector 20 is arranged on a transparent screen 23 placed in front of the lamp. The transparent screen is for example visible in the exploded view of Figure 4, while for simplicity of illustration it is not shown in the perspective view of Figure 2b.

In addition or as an alternative to the support of the first reflector 20 by means of a transparent screen 23, according to a possible embodiment, the first reflector 20 can be fastened to the lamp, for example to the second reflector 30 with connection means 23a having a longitudinal extension which allow the fastening at the perimeter edge of the second reflector 30.

Preferably, the operational area to be illuminated has a round geometry shape. Even more preferably, the operational area has an elliptical, oval or rectangular shape.

Even more preferably, the operating area has the shape, geometry and intensity of illumination as required by the CE EN 9680 standard.

According to a preferred embodiment, the at least one LED source 10a, 10b, 10c, 10d, 10e, 10f is substantially located at the passage 32, in a point of the space set back from the same passage 32 and outside the volume 33.

In an embodiment according to the invention, for example visible in Figure 4, the support element 40 comprises at least one cavity 41a, 41b, 41c, 41d, 41e, 41f, preferably a plurality of cavities for housing a corresponding lens 60 of the LED source.

As shown in the embodiment in figure 4, the at least one cavity 41a, 41b, 41c, 41d, 41e, 41f of the support element 40 can have a circular cross-section, but further geometries, such as square, are not excluded. , rectangular or elliptical.

In a possible embodiment shown in figure 4, 6a, 6b, the lamp 1 comprises a plurality of LED sources 10a, 10b, 10c, 10d, 10e, 10f, and at least one respective lens 60, preferably a biconvex lens, each housed in a cavity 41a, 41b, 41c, 41d, 41e, 41f of the support element. In an embodiment according to the invention, the at least one LED board 10 is connected to a heat dissipation element, for example a radiator 80 (better visible for example in Figures 4, 5a, 5b) for the dissipation of the generated heat by said at least one LED board, said radiator also being constrained to the support element 40.

In an embodiment according to the invention, the element 40 is removably constrained to the second reflector 30 by means of connection (not shown), so that the at least one cavity 41a, 41b, 41c, 41d , 41e, 41f for a respective lens 60 is aligned with the at least one passage 32 of the second reflector 30.

More in detail, in an embodiment according to the invention, the support element 40 is fixed to the external convex surface 36 of the second reflector 30 by means of fastening means, so that the at least one cavity 41 is aligned with at least one opening 32.

Said fastening means can be selected, for example, from screws, bolts, and / or interlocking means of the elastic type.

In an embodiment according to the invention, the concave reflecting surface 31 of the second reflector 30 comprises a plurality of reflective faceted elements 31a, for example visible in the perspective views of figures 2a, 2b.

Said reflecting elements are facets obtained in one piece from the second reflector, preferably having the shape of a parabola 30, obtained in polished or chromed metal.

As for example visible in Figure 1, the light radiation 11 emitted by the light source is reflected by the first reflector 20 on the second reflector 30. The facets 31a.1, 31a.2, 31a.3 allow the generation of light beams which are directed towards the entire operational area to be illuminated 100, thus obtaining an improved scialytic effect.

According to an embodiment, said reflecting elements 31a are obtained in one piece with the second parabola 30, obtained in plastic material and coated with a reflective treatment.

According to an embodiment, said reflecting elements 31a are shown on the parabola 30.

Preferably these facets or reflecting elements 31a are arranged on the concave surface of the second reflector 30 in such a way as to cover it at least in part, preferably in such a way as to completely cover it.

According to a preferred embodiment, the reflecting elements 31a are positioned on the concave surface of the second reflector 30 according to an ordered pattern, for example they can have a substantially rectangular or square shape, since they are arranged along a plurality of straight lines perpendicular to each other (such as example in the embodiment shown in Figures 2a, 2b).

According to further possible embodiments, the reflecting elements 31a are positioned on the concave surface of the second reflector 30 according to an ordered pattern, for example so as to form concentric circles around the area 34 in correspondence with which the at least one passage 32 is placed for the light radiation emitted by the LED source.

However, embodiments are not excluded in which the reflecting elements 31a can be arranged on the concave surface of the second reflector 30 according to a random, unordered pattern.

The operating light 1 according to the invention comprises at least one filter 50, 50a which comprises at least one colored transparent element, for filtering at least one wavelength or an interval of wavelengths of the light radiation emitted by said at least one LED source 10.

According to an embodiment, for example shown in Figure 6a, 6b, this filter 50, 50a is placed between the at least one LED source 10a, 10b, 10c, 10d, 10e, 10f and the at least one passage 32.

According to an embodiment, this filter 50, 50a is preferably placed between the at least one lens 60 and the at least one aperture 32.

In an embodiment, said at least one filter 50, 50a is a transparent colored filter, which allows you to filter at least one wavelength of the radiation emitted by at least one LED source 10a, 10b, 10c, 10d, 10e, 10f.

In a further embodiment, said filter can include multiple colors, to filter a plurality of wavelengths of the radiation emitted by at least one LED source 10a, 10b, 10c, 10d, 10e, 10f.

In one embodiment the at least one filter 50, 50a is movable between at least a first position, for example shown in Figure 6a, in which said filter 50, 50a does not interfere with the light radiation emitted by the at least one LED source, and a second position (for example shown in Figure 6b) in which said filter 50, 50a interferes with at least part of the light radiation emitted by the at least one LED source 10a, 10b, 10c, 10d, 10e, 10f.

The at least one filter 50, 50a is movable at least partially in rotation or translation, or a combination thereof, between said first position and said second position.

In an embodiment not shown in the figure, the translation of said filter 50, 50a is operated by known means for translation, for example a guide or rail.

In a further embodiment, for example shown in Figure 3, the filter 50, 50a is constrained in rotation, for example in correspondence with a pivot axis.

In a preferred embodiment shown in Figure 6a, 6b, the at least one filter 50, 50a is constrained to the support element 40 by means of said means for rotation, which comprise actuation means 42, 52 which allow at least partial rotation of the at least one filter 50, 50a with respect to the support element 40 and to the second parabola 30, around a respective pivot axis A perpendicular to the plane on which the filter body lies.

The rotation of the filter 50, 50a is operated by known means such as for example one or more toothed wheels 42, 52, or one or more gears which transmit motion from an actuator, for example an electric motor, or by manually operable actuation means. by a user.

In a further embodiment not shown in the figure, the at least one filter 50, 50a can be constrained to the convex outer surface 36 of the second reflector 30, by means of translation and / or rotation.

According to a possible embodiment, the filter can be translated and / or rotated by an operator between said first non-interference position and said second interference position or vice versa, by means of actuation means. These actuation means can be manual actuation means which can comprise for example guides, levers, screws, gears or wheels, or automated actuation means, regulated by a control unit 56 (or control board) and can comprise for example an electric motor. In a preferred embodiment shown in figures 5 and 6, the surgical lamp 1 comprises at least two filters 50, 50a bound to the support element 40, preferably in a rotatable way. In this preferred embodiment, the filters rotate in the opposite direction (the left filter 50 rotates clockwise, while the right filter 50a rotates counterclockwise) to pass from said first non-interference position (Figure 6a) to said second interference position (figure 6). In other words, the first filter 50 rotates clockwise between said first non-interference position and said second interference position and the second filter 50a rotates counterclockwise between said first non-interference position and said second interference position.

According to an embodiment, the operating light 1 according to the invention comprises at least one peripheral interface 57 (see Figures 2b and 4) for the operator, which can comprise a monitor and / or a keyboard, in order to adjust, through the control unit or CPU 56, some parameters of the lamp, such as for example the intensity of the light radiation emitted by at least one LED source 10a, 10b, 10c, 10d, 10e, 10f and / or the color temperature resulting from the different light spectra emitted by at least two LED sources of spectrum and / or color temperature different from each other and / or the translation / rotation of the at least one filter 50 with respect to the support element 40.

As indicated above, according to one aspect, the operator acting on the CPU or control unit 56, for example by means of the peripheral interface 57, can adjust the light radiation emitted by the lamp, for example by regulating the intensity of at least one first source LEDs and at least a second LED source that emit light radiations having different spectro-photometric properties.

For example, the control unit 56 can be configured to control LED sources that emit white light of different color temperatures and / or LED sources emit light radiations having different wavelengths corresponding to light of different colors, preferably yellow or amber. or red, in such a way as to allow their mixing.

For example, as discussed above, the control unit 56 can be configured, for example by means of a control software, to regulate the intensity of the radiations emitted by at least one first LED source and by at least one second LED source in an inversely dependent manner. one from the other, by increasing the intensity of the light radiation emitted by the at least one first LED source as the intensity of the light radiation emitted by the at least one second source decreases and vice versa, for example by adjusting the voltage of the electric current and / or the intensity of the electric current supplied to the operating light.

Claims (24)

CLAIMS 1. LED operating light (1) which includes: - at least one LED source (10a, 10b, 10c, 10d, 10e, 10f), - at least one support element (40) for housing the at least one LED source (10a, 10b, 10c, 10d, 10e, 10f), - at least one lens (60) for collimating the light radiation (11) emitted by said at least one LED source; - at least one first reflector (20) having a reflecting surface (21), - at least one second reflector (30) having a substantially concave shape, the concavity of which defines a volume (33), and having a substantially concave reflecting surface (31), said second reflector (30) comprising at least one passage (32) for the light radiation (11) emitted by said at least one LED source (10a, 10b, 10c, 10d, 10e, 10f), wherein the reflecting surface (21) of said first reflector (20) faces the concave reflecting surface (31) of said second reflector (30), and the at least one LED source (10a, 10b, 10c, 10d, 10e , 10f) is substantially located in correspondence with the at least one passage (32) and the light radiation (11) emitted by said at least one LED source (10a, 10b, 10c, 10d, 10e, 10f) and collimated by said lens (60 ) passing through said passage (32) is reflected by said reflecting surface (21) of said first reflector (20) towards said concave reflecting surface (31) of said second reflector (30) and is subsequently reflected by said concave reflecting surface (31) ) of said second reflector (30) to illuminate an operating area (100). Surgical lamp (1) according to claim 1, wherein the reflecting surface (21) of said at least one first reflector (20) is at least partially convex. Surgical lamp (1) according to claim 1, comprising a plurality of LED sources (10a, 10b, 10c, 10d, 10e, 10f), preferably said second reflector (30) comprising a plurality of passages (32), more preferably said at least one second reflector (30) comprising at least one passage for each LED source (10a, 10b, 10c, 10d, 10e, 10f). 4. Surgical lamp (1) according to any one of the preceding claims, characterized in that said at least one lens (60) is biconvex. 5. Operating lamp according to any one of the preceding claims characterized in that said first reflector (20) is connected to the second reflector (30) by means of connection (22,23) at a predetermined distance, preferably said connection means comprise at least one support arm (22) and / or at least one transparent screen (23). Operating light (1) according to any one of the preceding claims, characterized in that the at least one LED source (10a, 10b, 10c, 10d, 10e, 10f) is substantially located in correspondence with the at least one passage (32) , in a point of the space set back with respect to the passage (32) and external to the volume (33) defined by the concavity of said second reflector (30). Operating light (1) according to any one of the preceding claims, characterized in that said support element (40) comprises at least a covering portion (43) for covering the rear part of the operating light (1). 8. Surgical lamp (1) according to one of the preceding claims characterized in that said support element (40) comprises at least one cavity (40b, 41, 41a, 41b, 41c, 41d, 41e, 41f) for housing the at least one LED source (10a, 10b, 10c, 10d, 10e, 10f), preferably for housing at least one lens (60) of said at least one LED source (10a, 10b, 10c, 10d, 10e, 10f). 9. Surgical lamp according to claim 8, characterized in that the said support element (40) is fixed to the convex outer surface (36) of the said second reflector (30) by means of connection, so that the at least one cavity (41, 41a, 41b, 41c, 41d, 41e, 41f) is aligned with the at least one opening (32). Operating light (1) according to one of the preceding claims, characterized in that the concave reflecting surface (31) of the second reflector (30) comprises a plurality of reflecting elements (31a, 31a.1, 31a.2, 31a. 3). Operating lamp (1) according to any one of the preceding claims, wherein the second reflector (30) has a substantially parabolic shape, preferably has the shape of a paraboloid. Surgical lamp (1) according to any one of the preceding claims, characterized in that it comprises at least one filter (50, 50a), preferably said filter comprising at least one colored transparent element, for filtering at least one wavelength or an interval of wavelengths of the light radiation emitted by said at least one LED source. 13. Operating light (1) according to any one of the preceding claims, wherein the filter (50, 50a) is placed between the at least one LED source (10a, 10b, 10c, 10d, 10e, 10f) and the at least one passage (32) of said second reflector (30), preferably said filter (50, 50a) is placed between the lens (60) and the at least one passage (32). 14. Surgical lamp according to claim 12 or 13, characterized in that said at least one filter (50, 50a) is movable between at least a first position in which said filter (50, 50a) does not interfere with the light radiation emitted by said at least an LED source and a second position in which said filter (50, 50a) interferes with at least part of the radiation emitted by said at least one LED source (10a, 10b, 10c, 10d, 10e, 10f). Lamp according to claim 14, wherein said at least one filter (50, 50a) is movable at least partially in rotation or translation, or a combination thereof, between said first position and said second position. 16. Lamp according to claim 14 or 15, wherein said at least one filter (50, 50a) comprises actuation means (42, 52) which allow at least partial rotation and / or translation of said filter (50, 50a). Lamp according to any one of the preceding claims, wherein said at least one support element (40) for housing the at least one LED source (10a, 10b, 10c, 10d, 10e, 10f) is releasably fixed to the lamp , it is preferably releasably linked to said second reflector (30). 18. Lamp according to any one of the preceding claims, wherein said at least one passage (32) for the radiation emitted by the at least one LED source is a through opening made on said second reflector (30), or is a loop made on perimeter edge of said second reflector (30). Lamp according to any one of the preceding claims, wherein said at least one support element (40) is made in a single piece with said second reflector (30) and / or with a casing (44). Lamp according to any one of the preceding claims, wherein said at least one lens (60) is made in a single piece with said at least one support element (40), preferably said support element being transparent. 21. Lamp according to any one of the preceding claims, comprising at least one element (80) for dissipating the heat generated by said at least one LED source (10a, 10b, 10c, 10d, 10e, 10f), preferably said heat dissipating element being constrained to said support element (40). 22. Lamp according to any one of the preceding claims, wherein said LED sources (10a, 10b, 10c, 10d, 10e, 10f) emit white light of different color temperature and / or emit light radiations having different wavelengths corresponding to light of different color, preferably yellow or amber or red. 23. Lamp according to any one of the preceding claims, in which the light radiation emitted by at least a first LED source (10a, 10b, 10c, 10d, 10e, 10f) is mixed, preferably in an adjustable way by an operator, with the light radiation emitted by at least one second LED source (10a, 10b, 10c, 10d, 10e, 10f). 24. Lamp according to claim 23, wherein the intensity of the light radiation emitted by at least one LED source (10a, 10b, 10c, 10d, 10e, 10f) and by at least one further LED source (10a, 10b, 10c, 10d , 10e, 10f) is regulated in a dependent manner on each other according to an inverse dependence relationship, preferably by increasing the intensity of the light radiation emitted by the at least one first LED source as the intensity of the light radiation emitted by the at least one decreases second LED source, and vice versa.