Industrial Lighting Equipment

Abstract

To provide an industrial lighting device that can resist extreme external vibrations.SOLUTION: An industrial lighting device 10 comprises: a light source; a sealed housing 14 containing the light source, the sealed housing 14 comprising a support delimiting a housing window extending opposite the light source, a window pane sealing the housing window, and a sealing gasket compressed between the window pane and the support; and a filter 16 comprising a frame defining a frame window which is removably fixed to the housing, in an assembled position in which the frame window is opposite the housing window and an optical film sealing the frame window. The device comprises an elastic compression member arranged between the support and the frame.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to industrial lighting devices. [Background technology]

[0002] In industrial environments, lighting devices must withstand severe stresses. In particular, they must be sealed, for example to class IP65, and must withstand vibrations, which typically impose accelerations of more than 10 g, more than 20 g, more than 50 g, or even more than 80 g, for example when the device is fixed to an industrial robot. "g" stands for 9.80665 m / s 2 refers to the standard acceleration due to gravity, which is equal to

[0003] Also, lighting conditions impose the need for easy changeability, particularly to adapt to the object being illuminated.

[0004] There is a persistent need for new lighting devices that meet these constraints and are particularly able to withstand extreme external vibrations. Summary of the Invention [Problem to be solved by the invention]

[0005] It is an object of the present invention to at least partially meet this need. [Means for solving the problem]

[0006] The present invention provides an industrial lighting device, comprising: A light source and a sealed housing containing the light source, a support defining a housing window extending opposite the light source, i.e., through which the light source can radiate directly toward the exterior of the housing; a window pane sealing the housing window; a sealing gasket extending along the periphery of the housing window and pressed between the window pane and the support; the sealed housing comprising: a filter extending outside the housing and in front of the housing window, a frame defining a frame window removably secured to the housing in an assembly position where the frame window faces the housing window; an optical film secured to the frame and sealing the frame window; the filter comprising: It is equipped with The device is proposed, wherein the device comprises a resilient compression member disposed between the support and the frame.

[0007] Such a resilient compression member advantageously allows for the absorption of at least a portion of the vibrations transmitted to the filter by the support.

[0008] The device according to the invention may further comprise one or more of the following optional features: the elastic compression member is configured to elastically press an edge of the frame toward the frame window and / or to elastically press the frame against the window pane; in the plane of the frame, the filter is in elastic contact exclusively with the support or with an adjacent filter; the elastic compression member has a latch that is elastically pressed into a catch defined by the support, preferably into a groove defined by the support, in the assembled position to prevent the filter from falling out in a direction perpendicular to the plane of the frame. cooperation of the latch and the catch causes the elastic thrust to the edge of the frame near the frame window and / or to the frame near the pane; Alternatively, the resilient compression member does not have a latch that can prevent the filter from falling out in a direction perpendicular to the plane of the frame. the frame having two opposing straight long edges and two opposing straight short edges, which are preferably perpendicular to the long edges so that the frame has a rectangular shape; Each elastic compression member is provided with a latch that is elastically pressed into a catch defined by the support in the assembled position to prevent the filter from falling off in a direction perpendicular to the plane of the frame, and each elastic compression member that does not have a latch that can prevent the filter from falling off in a direction perpendicular to the plane of the frame is provided on one of the long edges. Alternatively, each elastic compression member having a latch that is elastically pressed into a catch defined by the support in the assembled position to prevent the filter from falling out in a direction perpendicular to the plane of the frame is arranged on one of the short edges, and each elastic compression member that does not have a latch that can prevent the filter from falling out in a direction perpendicular to the plane of the frame is arranged on one of the long edges. at least one said elastic compression member, preferably each said elastic compression member, is rigidly fixed to or made from the material of the frame; The device comprises several of the filters arranged side by side to cover the entire housing window. A plurality of said filters have the same dimensions; A plurality of the filters have different optical properties; The device includes one of the elastic compression members disposed between the opposing edges of two frames of two filters arranged side by side.

[0009] In a first main embodiment, the device comprises an elastic compression member configured to elastically press the frame edge toward the frame window, the elastic compression member being known as a "centripetal elastic compression member."In this specification, the "elastic compression member" is also referred to as the "elastic pressing member."

[0010] The centripetal elastic compression member allows for damping of acceleration in the direction of the thrust of the centripetal elastic compression member, and also allows for compensation of production tolerances.

[0011] Preferably, the apparatus comprises first and second centripetal resilient compression members which exert opposite parallel thrust forces on the first and second frame edges, preferably the first and second long frame edges, respectively.

[0012] Preferably, due to the elastic thrust force acting on the frame edge, it does not have to abut the support, preferably the housing, in the plane of the frame. In other words, the frame can be displaced in any direction parallel to this plane. The resulting elastic clamping therefore provides a particularly high resistance to detachment during acceleration in this direction. The filter therefore remains attached to the housing even when the industrial lighting device is subjected to severe vibrations.

[0013] The centripetal elastic compression member advantageously also allows compensation for production play.

[0014] According to a second main embodiment, the device comprises an elastic compression member, also known as an "axial elastic compression member", configured to elastically urge the frame towards the pane.

[0015] The axially elastic compression members allow for compensation for manufacturing play and for maintaining intimate contact between the frame and the pane in the event of vibrations, which advantageously allows the filter to benefit from the damping effect of the sealing gasket.

[0016] According to a third main embodiment, the device comprises several filters arranged side by side to form a set of filters extending outside the housing and in front of the housing window.

[0017] Varying the placement of the filters allows for changes in illumination if the filters are not all the same.

[0018] Preferably, the device comprises a centripetal elastic compression member arranged between the edges of the frame of two adjacent filters, preferably two adjacent filters of each pair, which advantageously substantially increases the frame's capacity for in-plane deformation and vibration absorption. The same applies to its capacity for absorption of manufacturing play.

[0019] Furthermore, the present invention relates to the use of a device according to the invention in environments where the device is subjected to accelerations of more than 10g, more than 20g, more than 30g, more than 50g, even more than 80g and / or less than 200g.

[0020] Finally, the invention relates to a kit comprising an industrial lighting device according to the invention and a number of auxiliary filters.

[0021] In one embodiment, the auxiliary filter has optical properties different from the optical properties of one or more filters of the device. Also, the one or more filters fixed to the housing are outside the housing. Therefore, advantageously, they can be very quickly disassembled and replaced with auxiliary filters. Thus, the illumination provided by the device can be easily changed.

[0022] Unless incompatible, features of the various main embodiments may be combined, whether optional or not.

[0023] definition A "light source" is an electrical source capable of emitting radiation in the visible, infrared, or ultraviolet range.

[0024] An "electronic unit" is an assembly comprising electronic components with a processor and a memory, and software loaded into the memory and containing program code instructions for performing desired functions. Furthermore, the electronic unit comprises input and output ports, in particular for the connection of lamps and possibly a camera. Furthermore, the electronic unit may preferably comprise a human-machine interface, e.g., a screen, and preferably a communication module, e.g., via the Internet, Wi-Fi or Bluetooth, or via a telephone network. Finally, the electronic unit comprises a communication bus between the electronic components.

[0025] The height direction is the thickness direction.

[0026] The thickness direction is perpendicular to a plane parallel to the length direction and width direction.

[0027] The words "comprise," "contain," and "present" are to be construed broadly and without limitation, unless otherwise expressly stated.

[0028] Further features and advantages of the present invention will be apparent from reading the following detailed description of the invention and from examining the accompanying drawings. [Brief explanation of the drawings]

[0029] [Figure 1] 1 shows a schematic perspective view of a lighting device according to the invention; [Figure 2] 2 shows a schematic mid-section of the device of FIG. 1; [Figure 3] 2 shows a schematic perspective view of a filter of the lighting device of FIG. 1; [Figure 4] 2 shows a schematic perspective cross-section of a filter of the lighting device of FIG. 1; [Figure 5] 2 shows a schematic view from above of the end of the filter of the lighting device of FIG. 1; [Figure 6] 2 shows a schematic side view of the end of a filter of the lighting device of FIG. 1; [Figure 7] A set of two filters side-by-side is shown schematically from above. [Figure 8] 2 illustrates the assembly of a filter for the lighting device of FIG. 1; [Figure 9] 2 shows an exploded view of the filter of the lighting device of FIG. 1;

[0030] In the above figures, the same reference numbers (which may be given various suffixes) are used to refer to the same or similar elements.

[0031] The length, width and height (or thickness) directions are denoted as L, l and e, respectively. DETAILED DESCRIPTION OF THE INVENTION

[0032] 1 and 2 show an industrial lighting device 10 in accordance with a preferred embodiment of the present invention. The device includes a light source 12, a housing 14, and a filter 16.

[0033] Preferably, the lighting device also comprises an electronic unit 17 configured to control the light source. Preferably, the electronic unit 17 comprises wired or wireless communication means allowing the reception of commands issued from outside the housing, for example issued by a camera.

[0034] The light source 12 preferably comprises more than two, preferably more than three, and / or less than ten, seven, or five lamps 18. Each lamp 18 may comprise one or more electroluminescent diodes (LEDs). Each lamp 18 is preferably capable of emitting at least 200 lumens into a projection cone having an apex angle of 70 degrees. Preferably, the lamps 18 are aligned.

[0035] The housing 14 hermetically encloses the light source 12. The standard protection index (IP) according to the international standards of the International Electrotechnical Commission is preferably IP65, IP66, IP67 or IP68.

[0036] The housing 14 includes a support 20, preferably made of aluminum, a window pane 22 and a sealing gasket 23.

[0037] The support preferably includes cooling fins 24 configured to facilitate the removal of heat generated by the light source 12 .

[0038] Furthermore, the support conventionally and preferably comprises a connector 29 passing through the housing, which is able to receive energy and / or commands outside the housing, for example via a cable connected to a power source or a controller, and to transmit these to the light source and / or the electronic unit;

[0039] The housing 14 preferably has the shape of a bar, preferably of rectangular cross section.

[0040] Preferably, the housing 14 comprises: a length preferably greater than 10 cm, preferably greater than 20 cm, and / or less than 300 cm, less than 200 cm, less than 100 cm, less than 60 cm or less than 50 cm; and / or width greater than 4cm and / or less than 20cm, less than 15cm or less than 10cm, and / or Height greater than 4cm and / or less than 20cm, less than 15cm or less than 10cm It has.

[0041] The front face of the housing defines a housing window 26 that extends opposite the light source 12 .

[0042] A flat window pane 22 is secured to the support to seal the housing window 26. The pane 22 can be made of any transparent material, such as glass, or preferably optically clear plastic. The thickness of the pane is preferably greater than 0.5 mm and / or less than 8 mm.

[0043] A continuous gasket 23 surrounds the window housing 26. Any conventional sealing gasket may be used. Preferably, the gasket 23 is a silicone bead.

[0044] The periphery of the pane 22 is compressed between the gasket 23 and the housing rebate 28. The gasket 23 has a resilience that allows this compression, and therefore the seal, to be maintained in the event of vibration.

[0045] The filter 16 comprises a substantially flat frame 30 defining a frame window 36 and an optical film 38 secured to the frame 30 and sealing the frame window 36. The filter preferably has a mass greater than 5 grams or greater than 10 grams and / or less than 200 grams, less than 100 grams, less than 50 grams, less than 30 grams, and preferably less than 20 grams.

[0046] The frame 30 is preferably formed from two basic frames 30a and 30b, which are made of plastic and are fixed to each other so as to sandwich the optical film 38 between them. Preferably, the two basic frames are ultrasonically welded to each other.

[0047] Preferably, the width of the frame is substantially the same as the width of the housing, preferably more than 90% of the width of the housing.

[0048] In one embodiment, the device includes a single filter, and the length and width of frame 30 are preferably substantially the same as the length and width of the front face 25 of the housing. Preferably, the surface area of ​​the frame represents more than 90% of the surface area of ​​the front face of the housing.

[0049] However, the length of the frame may be shorter than the length of the housing, so that several filters may be placed along the front surface of the housing, as shown in Figure 7. The characteristics of the filters may be the same or different. The selection of the filters and their placement advantageously allows a large number of possible lighting configurations to be achieved.

[0050] Also, the same filter can be advantageously used for housings of different lengths.

[0051] The frame 30 preferably includes: preferably more than 10 cm, preferably more than 20 cm, and / or less than 50 cm, less than 40 cm in length; and / or width greater than 4cm and / or less than 20cm, less than 15cm or less than 10cm, and / or Thickness greater than 1 mm and / or less than 10 mm, less than 5 mm or less than 3 mm It has.

[0052] Optical film 38 is a film adapted to a desired optical effect. Preferably, optical film 38 is adapted to change the shape and / or size of the light beam emitted by the light source.

[0053] Preferably, the optical film 38 is a holographic film, such as that sold by the company Luminit, which makes it possible to define the apex angle of the projection cone of the lamp.

[0054] The optical film 38 is preferably flexible and held taut in the frame 30. Preferably, the optical film 38 is more than 100 microns and / or less than 1 mm, less than 500 microns, preferably less than 400 microns thick.

[0055] The optical film 38 may be fixed to the frame 30 by any means, for example glued or bonded or clamped between two basic frames.

[0056] The frame 30 is provided with generally L-shaped bolts 42 around its periphery. As shown in FIG. 5, each bolt: a connecting arm 46, where the connecting arm 46 forms a short branch of the L, the first end of which is fixed to the peripheral edge of the frame 30; and a resilient arm 48, wherein the resilient arm 48 forms the long branch of the L, extends parallel to the peripheral edge of the frame 30, and has a first free end and a second end fixed to the second end of the connecting arm 46; It is equipped with:

[0057] The first free end includes an outwardly facing projection or "latch" 49.

[0058] Preferably, frame 30 includes bolts 42 only along its longitudinally extending edge, or "long edge," 47. Preferably, frame 30 includes bolts 42 along both of its long edges.

[0059] The latch 49 of each bolt 42 cooperates with a respective recess or "catch" 50 defined by the housing to retain the filter in the housing, i.e., to prevent the filter from falling out. More precisely, the shape of the bolt 42 allows elastic deformation of the bolt from its rest shape to bring the latch 49 close to the edge of the frame and to allow the latch 49 to be placed in position opposite the opening of the catch 50. Releasing this action on the bolt then allows the latch 49 to be introduced into the catch 50. The latch is then held by the catch in the locked position of the bolt.

[0060] The catch for the bolt located at the long edge 47 of the frame may in particular be defined by a longitudinal groove 51 defined by the support 20 along a long edge 53 of the support that abuts the housing window 36 and is adjacent to the long edge 47 of the frame.

[0061] Release of the latch from the catch establishes the unlocked position of the bolt required for removal of the filter.

[0062] At least one bolt, preferably each bolt 42, constitutes a compression member that elastically presses against the frame edge that is fixed to the frame window. Compression of the frame inward in its plane is known as "centripetal compression." Centripetal compression can be obtained in particular with elastic bolts that tend to maintain a constant angle between their two arms, i.e., the "first rest angle." If, in the assembled position of the filter in the housing, the angle between the two arms of the bolt is forced to be smaller than the first rest angle by the shape of the recess in which it is received, the tendency to restore the first rest angle results in the application of a centripetal force.

[0063] 5, the bolts are shown in solid lines in their rest position and in dotted lines in the filter installation position. Contact with the bottom surface of the groove of the support 20, shown in dashed lines, creates a centripetal compression force F c This results in:

[0064] The centripetal elastic compression advantageously allows the absorption of accelerations in the plane of the filter while holding the bolt in position in its recess.

[0065] Preferably, the device comprises one or more pairs of bolts which, in the assembled position of the filter, exert reaction forces parallel to each other but in opposite directions.

[0066] Preferably, such pairs of bolts are not aligned widthwise, which allows the bolts to function as poka-yoke devices, ensuring that the filter can only be attached in one position on the housing.

[0067] Preferably, the device comprises several bolts arranged to ensure a full-circumference bearing, i.e., a resilient bearing, on the support of the frame in a direction parallel to the plane of the frame. In other words, the frame does not abut on the plane of the frame. The frame can be resiliently moved in any direction in the plane of the frame, in particular in the length and width directions. This substantially increases the resistance of the filter to accelerations in the plane of the frame.

[0068] The bolt 42 does not have to constitute a centripetal elastic compression member, but simply has the function of a bolt for holding the filter. In particular, in the locked position, the bolt can be in a rest shape, i.e. not pressing against the housing in any way. However, under the effect of a strong acceleration, such a bolt can be deactivated, i.e. the latch can come out of the receiving catch.

[0069] The device may also include one or more centripetal elastic compression members that are spaced apart from bolts 42 and do not abut the housing axially, i.e., in the height direction, to contribute to the filter's resistance to slippage. These members are referred to as "free centripetal elastic compression members." Free centripetal elastic compression members may be provided on all or part of one or more edges of the frame.

[0070] 3 and 4, the free centripetal resilient compression member is formed by a tab 54 projecting from a short edge 56 of the frame 30. The resilience of the tab 54 ensures centripetal resilient compression along the length of the frame. However, the tab 52 does not have a latch that engages with a catch within the housing to prevent the filter from falling out.

[0071] 5, the tabs are shown in solid lines in the rest position and in dotted lines in the assembled position of the filter. Contact with the folded edge 57 of the support 20, shown in dashed lines, exerts a centripetal compressive force F on the frame. c ' is produced.

[0072] In one embodiment, the device has bolts 42 that form centripetal elastic compression members only at two opposing frame edges, e.g., at the two long frame edges. Preferably, at the other edges, e.g., at the two short frame edges, the device does not have bolts 42. At these other edges, the device may not have centripetal elastic compression members.

[0073] Preferably, at these other edges, the device is provided with three centripetal elastic compression members. This embodiment allows easy removal of the filter and provides high resistance to dislodging under the influence of vibrations, as shown for example in Figures 3 to 5.

[0074] It is also particularly advantageous to line up several filters along the housing, allowing two adjacent filters 16a and 16b to touch by their short edges, as shown in Figure 7, thus increasing the vibration damping material.

[0075] The centripetal elastic compression member not only contributes to vibration resistance but also to absorbing play resulting from manufacturing tolerances. Higher manufacturing tolerances and therefore reduced manufacturing costs are achievable thanks to the present invention.

[0076] At least one bolt, preferably each bolt 42, constitutes a compression member that elastically presses the frame toward the pane. Compression in the direction of the pane, perpendicular to the plane of the frame, is called "axial compression." Axial compression can be obtained, in particular, with elastic bolts that tend to maintain a constant angle, i.e., a "second rest angle," between the elastic arm of the bolt and the plane of the frame. If, in the assembled position of the filter in the housing, the angle between the elastic arm of the bolt and the plane of the frame is forced to be smaller than the second rest angle by the shape of the recess in which the bolt is received, the tendency to restore the second rest angle results in the application of an axial force at the pane 22.

[0077] 6, the bolts 42 are shown in solid lines in their rest position and in dotted lines in the assembled position of the filter. Contact with the support 20, shown in dashed lines, exerts a radial compressive force F on the filter. r This results in:

[0078] The axial elastic compression advantageously allows the filter 16 to be held against the pane 22, regardless of the displacement of the pane perpendicular to a plane extending (parallel to the plane of the frame). The pane is elastically supported in the housing via a gasket 23. This elastically deformable gasket helps to absorb the effects of accelerations perpendicular to the plane of the frame. Holding the filter against the pane advantageously allows the filter to benefit from this absorption, thus improving the retention of the bolt in the locked position.

[0079] Preferably, each bolt 42 constitutes both an axial and a centripetal elastic compression member. In alternative embodiments, one or more bolts may constitute exclusively centripetal elastic compression members and / or one or more bolts may constitute exclusively axial elastic compression members.

[0080] function The function of the lighting device follows directly from the description given above.

[0081] The mounting of the filter 16 in the housing is shown in FIG.

[0082] The filter is first separated from the housing (FIG. 8-a).

[0083] The first long edge 471 of the filter frame, which holds the first bolt 421, is pressed by the operator against the first long edge 531 of the support 20 against the first bolt 421 (FIG. 8-b). More precisely, the latch of the first bolt is introduced into the first groove 511 defined by the first long edge 531, and then compressed sufficiently so that the second long edge 472 of the frame of the filter can be placed facing the second groove 512 defined by the second long edge 532 of the support.

[0084] The filter may also be slightly distorted or bent between the first and second folded edges 571 and 572 of the support to facilitate its introduction.

[0085] The operator then stops pressing the filter against the first long edge 531 of the support 20. The action of the first bolt 421 then pushes the filter back towards the second long edge 532 of the support 20, which causes the latch of the second bolt 422 held by the second long edge 472 of the filter frame to engage with the second groove 512. The filter is then in the assembled position.

[0086] In this position, the latches of bolts 421 and 422 are engaged in grooves 511 and 512 respectively, which form catches that prevent the filter from falling out.

[0087] The bolt also in the plane of the frame, laterally along the two long edges of the frame, and Axial, i.e. vertical, perpendicular to the plane of the frame, The latch is compressed by contact with the groove so as to be resiliently compressed.

[0088] Additionally, tabs 54, which are held by first and second short edges 561 and 562 of the filter frame, are resiliently supported by first and second folded edges 571 and 572 of the support. Tabs 54 therefore also contribute to compressing the filter in the plane of the frame by exerting a compressive force in the longitudinal direction.

[0089] In the assembled position (FIG. 8-c), the filter is therefore elastically "suspended" in the plane of the frame, i.e. it can be elastically moved in this plane, in particular in the length or width direction, and this suspension makes it possible to effectively absorb vibrations.

[0090] The filter is also resiliently pressed against the pane 22 so as to permanently follow the movement of the pane, and therefore benefits from the damping effect of the gasket 23.

[0091] Removal of the filter is shown in FIG.

[0092] To deactivate the bolt 42, the flat end of the tool O, similar to the end of a flat-head screwdriver, is used and is introduced between the long edge 53 of the support and the resilient arm 48 of the bolt (FIG. 9-a).

[0093] Rotation of the tool, as shown in Figure 9-b, allows the bolts to be compressed and the latches 49 to be removed from the grooves 51 defined by the long edge 53 of the support, thus releasing the bolts. The filter can then be locally separated from the housing. Preferably, three bolts on the same long edge of the frame are simultaneously deactivated, and then this long edge is pulled to remove the filter.

[0094] The filter can then be replaced with another filter having different optical properties.

[0095] kit The filter's easy removable capability allows its rapid replacement by another filter with different characteristics, for example to modify the projection cone of the lamp.

[0096] Therefore, the kit according to the present invention comprises, in addition to the lighting device according to the present invention, one or more auxiliary filters, the optical film of which has different properties from the optical film of the one or more filters fixed to the housing.

[0097] The comments made above relating to filter 16 are applicable to the auxiliary filter.

[0098] As will now be apparent, the present invention provides a simple solution that advantageously allows good support of the filter in the housing while allowing high manufacturing tolerances for the housing.

[0099] Of course, the present invention is not limited to the embodiments described and shown above, which are provided for illustrative purposes only.

[0100] In particular, the frame need not be flat. The number and location of the bolts and tabs may vary. The present invention may be configured as follows. [Section 1] An industrial lighting device, comprising: a light source (12); A sealed housing (14) for containing the light source, a support (20) defining a housing window (26) extending opposite the light source; a window pane (22) for sealing the housing window; a sealing gasket (23) extending along the periphery of the housing window and pressed between the window pane and the support; The housing (14) comprises: a filter (16) extending outside the housing and in front of the housing window, a frame (30) defining a frame window (36) removably secured to the housing in an assembly position where the frame window faces the housing window; an optical film (38) fixed to the frame and sealing the frame window (36); The filter (16) is provided with It is equipped with The device includes a resilient pressing member (42, 54) disposed between the support and the frame. The device. [Section 2] Item 1. The device according to item 1, wherein the elastic pressing members (42, 54) are configured to elastically press the edge of the frame (30) towards the frame window (36) and / or to elastically press the frame against the window pane (22). [Section 3] 3. The device according to claim 1 or 2, wherein in the plane of the frame, the filter (16) is in exclusively elastic contact with the support (20) or with an adjacent filter. [Section 4] The device according to any one of items 1 to 3, wherein the elastic pressing members (42, 54) are provided with latches (49) that are elastically pressed into catches (50) defined by the support (20) in the assembled position so as to prevent the filter from falling out in a direction perpendicular to the plane of the frame. [Section 5] 3. The device according to item 1 or 2, wherein the elastic pressing member (54) does not have a latch that can prevent the filter from falling off in a direction perpendicular to the plane of the frame. [Section 6] The device includes a number of the elastic pressing members, The frame (30) has a rectangular shape and includes two opposing linear long edges (47) and two opposing linear short edges perpendicular to the long edges, and each elastic pressing member (42, 54) has a latch (49) that is elastically pressed into a catch (50) defined by the support (20) in the assembled position to prevent the filter from falling off in a direction perpendicular to the plane of the frame, but is arranged on one of the long edges and does not have a latch that can prevent the filter from falling off in a direction perpendicular to the plane of the frame. The device described in item 5, wherein each of the elastic pressing members (54) is arranged on one of the short edges, or each of the elastic pressing members (42, 54) having a latch (49) that is elastically pressed into a catch (50) defined by the support (20) in the assembled position to prevent the filter from falling off in a direction perpendicular to the plane of the frame is arranged on one of the short edges, and each of the elastic pressing members (54) that does not have a latch that can prevent the filter from falling off in a direction perpendicular to the plane of the frame is arranged on one of the long edges. [Section 7] 7. The device according to any one of claims 1 to 6, wherein at least one of the elastic pressing members (42, 54), preferably each of the elastic pressing members (42, 54), is rigidly fixed to or made from the material of the frame (30). [Section 8] Item 8. The device according to any one of items 1 to 7, comprising several filters arranged side by side to cover the entire housing window. [Section 9] Item 9. The device of item 8, wherein the filters have the same dimensions. [Section 10] Item 10. The device according to item 8 or 9, wherein the filters have different optical properties. [Section 11] Item 11. The device according to any one of items 8 to 10, comprising one elastic pressing member (42, 54) disposed between the opposing edges of two frames of two filters arranged side by side. [Section 12] Item 12. The device according to any one of items 1 to 11, wherein the housing has a protection index IP65, IP66, IP67 or IP68 according to the international standard of the International Electrotechnical Commission. [Section 13] Item 13. The device according to any one of items 1 to 12, wherein the frame (30) is composed of two basic frames (30a, 30b), and the two basic frames (30a, 30b) are heat-welded to each other so as to sandwich the optical film (38) therebetween. [Section 14] Item 14. Use of the device according to any one of items 1 to 13 in an environment where the device is subjected to an acceleration of more than 20 g.

Claims

1. An industrial lighting device, comprising: a light source (12); A sealed housing (14) containing the light source, a support (20) defining a housing window (26) extending opposite the light source; a window pane (22) sealing the housing window; a sealing gasket (23) extending along the periphery of the housing window and pressed between the window pane and the support; The housing (14) comprises: a filter (16) extending outside the housing in front of the housing window, a frame (30) defining a frame window (36) removably fixed to the housing in an assembly position where the frame window faces the housing window; an optical film (38) fixed to the frame and sealing the frame window (36); The filter (16) comprises: It is equipped with the device comprises a resilient pressing member (42, 54) disposed between the support and the frame; The elastic pressing member is a connecting arm (46) forming a short branch of an L-shape and having a first end and a second end, wherein the first end of the connecting arm is fixed to a peripheral edge of the frame (30); and a resilient arm (48) forming a long branch of the L-shape and having a first free end and a second end, wherein the resilient arm extends parallel to the peripheral edge of the frame, and the second end of the resilient arm is fixed to the second end of the connecting arm; Equipped with The device.

2. 2. The device of claim 1, wherein the elastic pressing members (42, 54) are configured to elastically press the peripheral edge of the frame (30) toward the frame window (36) and / or to elastically press the frame against the window pane (22).

3. 3. A device according to claim 1 or 2, wherein in the plane of the frame, the filter (16) is in exclusively elastic contact with the support (20) or with an adjacent filter.

4. 4. The device according to claim 1, wherein the elastic pressing members (42, 54) are provided with latches (49) that are elastically pressed into catches (50) defined by the support (20) in the assembled position to prevent the filter from falling out in a direction perpendicular to the plane of the frame.

5. 3. A device according to claim 1 or 2, wherein the elastic pressure member (54) does not have a latch capable of preventing the filter from falling out in a direction perpendicular to the plane of the frame.

6. The elastic pressing member includes a number of elastic pressing members, the number of elastic pressing members forming a first plurality of elastic pressing members and a second plurality of elastic pressing members; the frame (30) is rectangular and has two opposing straight long edges (47) and two opposing straight short edges perpendicular to the long edges; Each of the first plurality of elastic pressure members is arranged on one of the long edges and has a latch (49) that is elastically pressed into a catch (50) defined by the support (20) in the assembled position to prevent the filter from falling off in a direction perpendicular to the plane of the frame, and each of the second plurality of elastic pressure members (54) is arranged on one of the short edges and does not have a latch that can prevent the filter from falling off in a direction perpendicular to the plane of the frame, or Each of the first plurality of elastic pressing members is arranged on one of the short edges and has a latch (49) that is elastically pressed into a catch (50) defined by the support (20) in the assembled position to prevent the filter from falling off in a direction perpendicular to the plane of the frame, and each of the second plurality of elastic pressing members (54) is arranged on one of the long edges and does not have a latch that can prevent the filter from falling off in a direction perpendicular to the plane of the frame. The device according to any one of claims 1 to 3.

7. 7. The device according to any one of claims 1 to 6, wherein at least one said elastic pressing member (42, 54), preferably each said elastic pressing member (42, 54), is rigidly fixed to or made from the material of said frame (30).

8. 8. The device according to claim 1, comprising several of said filters arranged side by side to cover the entire housing window.

9. The apparatus of claim 8 , wherein a plurality of the filters have the same dimensions.

10. 10. The apparatus of claim 8 or 9, wherein the filters have different optical properties.

11. 11. A device according to any one of claims 8 to 10, comprising one said elastic pressing member (42, 54) arranged between the facing edges of two frames of two filters arranged side by side.

12. 12. The device according to any one of the preceding claims, wherein the housing has a protection index IP65, IP66, IP67 or IP68 according to the international standard of the International Electrotechnical Commission.

13. 13. The device according to any one of claims 1 to 12, wherein the frame (30) is composed of two basic frames (30a, 30b), which are heat-welded to each other so as to sandwich the optical film (38) therebetween.

14. Use of a device according to any one of claims 1 to 13 in an environment in which the device is subjected to accelerations of more than 20g.

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