JP2008123721A - Lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system using a safe solid light emitting element, especially a light emitting diode. <P>SOLUTION: The lighting system 1 is provided with a casing part 2, and the casing part 2 includes an outflow port 21 used in fixing the lighting system 1 on a supporting fixture tool 41. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an illuminating device, and more particularly to an illuminating device using a solid light emitting element such as a light emitting diode as a light source.

  In recent years, an illumination device using a solid-state light-emitting element typified by a light-emitting diode has attracted attention. This is because the fluorescent lamps that have been used in the past are not sufficient in life characteristics and need to be replaced after about 6000 hours, and the life characteristics have a large variation. Furthermore, it has been pointed out as a problem that mercury is used in a small amount. Mercury is a toxic substance as represented by Minamata disease. Therefore, with the recent improvement of environmental awareness, in Europe, the RoHS of the Hazardous Substantial inductive and electrical directive (Effectiveness of the directive) And the use of mercury is beginning to be restricted.

  On the other hand, the light emitting diode has a potential to solve the drawbacks of the fluorescent lamp. The light emitting diode has a very long time of 40,000 hours or more until the emission intensity is reduced to 80% or less of the initial value. It also contains no mercury.

  For example, Patent Document 1 proposes an illumination device using a light emitting diode as a light source, which can be replaced with a conventional fluorescent lamp. This illuminating device uses a diode OR circuit, so that a failure such as destruction of the light emitting diode does not occur even when the lighting device is mounted on the fluorescent lamp lamp in the right and left direction.

However, although the lighting device disclosed in Patent Document 1 can prevent a failure when mounted on a fluorescent lamp lamp in the right and left direction, it does not touch its electrical and physical safety. An illumination device using a light emitting diode as a light source has a completely different mechanism compared to a fluorescent lamp. For this reason, in order to make this lighting device safer, it is considered necessary to develop a new technology that matches the mechanism.
JP 2006-100036 A

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a lighting device using a solid-state light-emitting element, particularly a light-emitting diode, having high safety.

  The above-mentioned problem is a lighting device provided with a protection means for protecting the light emitter, and the protection means can be solved by having a fixing portion used when fixing the lighting device at a predetermined position. .

  By doing in this way, an illuminating device can be fixed with a fixing | fixed part. As a result, the lighting device can be securely fixed even in an emergency such as an earthquake, so that its safety can be further enhanced.

  Here, the protection means further includes a space portion having at least one hollow structure, and includes at least one first opening which is a hole serving as a fluid inlet into the space portion, and the space portion from the inside. It may include at least one or more second openings which are holes serving as fluid outlets, and the fixing part may be a part of the second openings.

  By doing in this way, the 2nd opening part which a protection means has can be utilized also as a fixing | fixed part. There is no need to specially provide the fixing portion, and there is an effect that the cost for manufacturing the fixing portion can be reduced.

  Here, the protection means may comprise a plurality of parts.

  By doing in this way, even if a holding means is complicated shape, it becomes possible to divide | segment into the element of simple shape, and there exists an effect that the cost at the time of manufacturing them can be reduced.

  Here, the protection means may be configured by integrating a plurality of parts by press working with an adhesive member interposed therebetween.

  By doing in this way, each component can be closely_contact | adhered and there exists an effect that the performance equivalent to the case where a protection means is comprised with a single component can be obtained.

  Here, the plurality of components may be formed to bend in a predetermined direction.

  In this way, when integrating a plurality of parts by press working, there is an effect that a large amount of the holding means can be manufactured with a small pressing pressure and a constant amount.

  Here, the light transmitting body may further include a transmission means that transmits light, and the transmission means may have conductivity.

  By doing in this way, there exists an effect that the electromagnetic noise which generate | occur | produced inside the illuminating device can be prevented from flowing out outside.

  Here, the transmissive means may contain a conductive material. Or the film which has electroconductivity may be affixed on the permeation | transmission means.

  By doing in this way, there exists an effect that electroconductivity can be easily given to a permeation | transmission means.

  Here, the light emitter is composed of a solid light emitting element and at least one holding means for holding a predetermined number of solid light emitting elements, and the protection means and the holding means are integrated by press working with an adhesive member interposed therebetween. May be.

  By doing in this way, the adhesiveness of a protection means and a holding means increases, and there exists an effect that the heat which generate | occur | produced in the solid light emitting element can be transferred efficiently.

  Here, the protection means may be formed curved in a predetermined direction.

  By doing in this way, when manufacturing several illuminating devices, there exists an effect that a protection means and a holding | maintenance means can be closely_contact | adhered by making press pressure constant.

  Here, the solid state light emitting device may be a light emitting diode.

  By doing in this way, there exists an effect that an illuminating device can be used as a light source which is long-life and is environmentally friendly.

  Here, the adhesive member may be a double-sided tape that does not contain a base material.

  By doing in this way, there exists an effect that a press work can be performed simply and without reducing thermal conductivity.

  Here, it may be the same size as any of the straight tube fluorescent lamps defined in 33.1 “List of data sheets” of JIS C7917-2 “Straight tube fluorescent lamps—Part 2: Performance specification”.

  By doing in this way, there exists an effect that an illuminating device can be inserted and used for the support for straight tube | pipe fluorescent lamps.

  As described above, according to the present invention, it is possible to provide a lighting device using a solid light emitting element having high safety, in particular, a light emitting diode.

  Illumination device 1 of the present invention will be specifically described with reference to the drawings. FIG. 1 is an external view of a lighting device 1 according to the present invention, in which the side on which light is emitted is the downward direction in the drawing. 2 is an external view of the lighting device 1 shown in FIG. 1 as viewed from the direction A on the drawing, and FIG. 3 shows the lighting device 1 shown in FIG. It is sectional drawing which showed the state cut | disconnected by.

  The illuminating device 1 is comprised from the housing | casing part 2, the terminal part 3, and the terminal pin 4, as shown in FIGS. Further, the housing part 2 is provided with an inflow port 5 and an outflow port 21. Furthermore, a solid light emitting element 31 and a substrate 32 are provided inside the lighting device 1, and a protective translucent plate 33 is provided in the light emitting direction of the solid light emitting element 31 of the housing unit 2.

  The illuminating device 1 has the same dimensions as any of the straight tube fluorescent lamps defined in 33.1 “List of data sheets” of JISC7917-2 “Straight tube fluorescent lamps—Part 2: Specification of performance”. It is the same size as a typical straight tube fluorescent lamp. The terminal pin 4 also has the same size and the same mechanism as the base used in a general straight tube fluorescent lamp. That is, the terminal pin 4 is used not only for introducing electric power from the outside to the inside of the lighting device 1 but also for fixing the lighting device 1 to a support 41 for a general straight tube fluorescent lamp as shown in FIG. It is designed to function as a base for the machine. Therefore, the illuminating device 1 can be used as it is attached to the support 41 for a general straight tube fluorescent lamp. Reference numeral 42 denotes a fixing tool, which will be described later.

The casing 2 is made of a material having a high thermal conductivity (preferably 200 W · m ⁻¹ · K ⁻¹ or more), and is usually made of aluminum. The reason is that the thermal conductivity satisfies the above-mentioned conditions and the heat dissipation characteristics are good. Furthermore, it is inexpensive, easy to form, and good recyclability.

  Although this housing | casing part 2 may be comprised with a single component, as shown in FIG. 3, it comprises with two components 34 and 35 here. The reason for such a configuration is that the shapes of the parts 34 and 35 are simpler than those in which the housing part 2 is manufactured collectively, thereby facilitating the manufacture thereof. The parts 34 and 35 can be created by utilizing, for example, a drawing method or press working.

  Here, the part 34 is preferably curved. FIG. 5A shows the component 34 curved in a convex shape. In this case, to bend the component 34 in a convex shape means to deform the central portion in the y direction on the drawing with respect to both ends in the longitudinal direction. FIG. 2B shows the component 34 curved in a concave shape. In this case, the component 34 is curved in a concave shape by deforming both end portions in the y direction on the drawing with respect to the central portion in the longitudinal direction.

  The component 34 may be curved or convex, but when the lighting device 1 is mass-produced, it should always be curved in either direction. Further, the component 35 should be curved when the component 34 is curved in a convex shape, and similarly curved when the component 34 is curved in a concave shape.

  The reason for curving as described above will be described with reference to FIG. FIG. 6 shows a combination of the component 34 and the component 35 when the housing unit 2 is manufactured. FIG. 2A shows the parts 34 and 35 both curved in a concave shape. On the other hand, FIG. 5B shows the component 34 curved in a concave shape and the component 35 curved in a convex shape.

  Assume that the components 34 and 35 are integrated in each combination. The integration method uses press working (the integration method includes welding, screwing, etc., but considering the manufacturing cost, the press working is optimal).

  At this time, the press pressure can be set lower in the case where the parts 34 and 35 are both concavely curved (FIG. 6A). Therefore, it is obvious that both the parts 34 and 35 are preferably curved in a concave shape.

  In particular, when manufacturing an elongated product like the casing 2 by press working, it is naturally preferable that the press pressure can be set low in order to prevent damage to parts. In the tests by the inventors, the amount of bending (the amount of bending here refers to the length deformed in the y direction) is optimally 200 μm when the length in the longitudinal direction is 1000 mm. It was.

  Here, the components 34 and 35 are both curved in a concave shape, but both may be curved in a convex shape.

  When the parts 34 and 35 are pressed, an adhesive member (not shown) is interposed. As an adhesive member, an adhesive, a double-sided tape, and the like can be considered, but the inventors selected a double-sided tape. The choice is based on the following facts.

  Examples of the adhesive include a heat curing type and a two-component mixed type. Of these, the heating and curing type naturally requires a heating device. In addition, the two-component mixed type takes time to cure, and it is necessary to maintain the pressure applied to the pressing during the curing time. These are costly and time consuming and significantly reduce the manufacturing efficiency.

  On the other hand, the double-sided tape does not require a heating device and does not need to wait for curing. Therefore, pressing can be performed quickly, and the efficiency of manufacturing is improved.

  Here, it is important to select a double-sided tape that does not include a base material. This is because the base material has low thermal conductivity.

  It has been observed in the experiments by the inventors that the casing 2 manufactured in this way has almost no deterioration in thermal conductivity even when compared with that manufactured by a single component.

  In the present embodiment, the casing unit 2 is configured by the two parts 34 and 35, but may be configured by three or more parts as a matter of course. It is preferable to decide in consideration of the cost for manufacturing and the cost for assembly.

  The protective translucent plate 33 is made of translucent glass or acrylic resin. On the surface of the protective translucent plate 33, fine irregularities are formed unevenly, or a light diffusion sheet (not shown) is attached, or a light diffusing agent is added to glass or acrylic.

  The protective translucent plate 33 serves to protect the solid light emitting element 31 and the like disposed inside the lighting device 1 and to diffuse the light emitted from the solid light emitting element 31. The light emitted from the solid state light emitting element 31 has a strong directivity and tends to be irradiated locally. For this reason, the light emitted from the solid state light emitting element 31 is diffused by the protective translucent plate 33, so that the directivity of the light is weakened and the light can be uniformly irradiated over a wide area.

  Here, a conductive material is added to the protective translucent plate 33, or a conductive film or the like is affixed to the surface (however, the translucency of the protective translucent plate 33 is significantly reduced at this time). It is important to select materials that will not be used).

  Thus, in the lighting device 1, both the casing 2 (usually made of aluminum) and the protective translucent plate 33 have conductivity. Therefore, even if electromagnetic noise is generated inside the lighting device 1, it is possible to prevent (reduce) the electromagnetic noise from flowing out to the outside.

  Here, the solid-state light emitting element 31 uses a light emitting diode. The light emitting diode to be used is a so-called high power light emitting diode whose power consumption per unit is 1 W or more, and is of a surface mount type. A high power light emitting diode has high luminous intensity and is suitable for lighting device applications. When the illumination device 1 is used as general illumination, the emission color of the solid-state light emitting element 31 to be used is preferably daylight, daylight white, white, warm white, or light bulb color. In addition, the illuminating device 1 can also be used as a crime prevention light by making the luminescent color of the solid light emitting element 31 to be used blue with a peak wavelength of 380 to 500 nm. Blue is said to have an effect of suppressing mental excitement. Therefore, the illumination device 1 that emits blue light is suitable as a security light.

  Here, the high-power light-emitting diode consumes a large amount of power, and accordingly, the energy released as heat is also large. If this heat is accumulated in the vicinity thereof, the brightness is lowered and the life characteristics are deteriorated. Therefore, it is important to handle this heat appropriately.

  In view of the above, the high power light emitting diode used as described above is of a surface mount type, which has a large electrode area, and hence a large area in contact with the substrate 32. Therefore, the heat generated in the high power light emitting diode can be efficiently conducted to the substrate 32.

  However, if the substrate 32 is not formed of a material having good thermal conductivity, heat will accumulate in the vicinity of the high power light emitting diode. Therefore, the lighting device 1 employs aluminum as the material of the substrate 32. Furthermore, the housing | casing part 2 is also formed with aluminum as above-mentioned. Aluminum has a good thermal conductivity, so that the heat generated by the high-power light-emitting diode can be diffused throughout the housing 2 via the substrate 32.

  Here, it is important that the casing unit 2 and the substrate 32 are brought into close contact as much as possible. One reason for this is that the heat conduction from the substrate 32 to the casing 2 is hindered by the entry of air between the casing 2 and the substrate 32.

  In order to bring the casing 2 and the substrate 32 into close contact with each other, a material having adhesive properties (for example, a double-sided tape without an adhesive or a base material) (not shown) is provided between the casing 2 and the substrate 32. Clamps and improves the adhesion between the two. Furthermore, it is also preferable to perform press working in this state to further improve the adhesion between the two. In addition, the inventors selected the double-sided tape without a base material as a material having adhesiveness from the viewpoint of production efficiency.

  It is also preferable to divide the substrate 32 into a plurality of parts. This is to prevent deterioration in the adhesion between the casing 2 and the substrate 32 when the temperature of the lighting device 1 rises when the linear expansion coefficients of the casing 2 and the substrate 32 are different. . By dividing the substrate 32, the length in the longitudinal direction is shortened. As a result, the amount of expansion per sheet is reduced.

  Therefore, it becomes easy to absorb the difference in expansion between the casing 2 and the substrate 32 with the adhesive material, and thus it becomes easy to maintain the adhesion between the casing 2 and the substrate 32. This method of dividing the substrate 32 is particularly effective when the length of the lighting device 1 in the longitudinal direction is long.

  Here, in the case where a plurality of lighting devices 1 are manufactured, it is necessary to always bend the housing portion 2 in a certain direction. As an example, in FIG. 7, the casing 2 is curved in advance in a concave shape (the central portion is deformed in the y direction with respect to the end portion in the longitudinal direction), but may be curved in a convex shape. That is, the curved direction of the housing | casing part 2 is selected to either convex shape or concave shape, and it always curves in that direction. By doing in this way, when manufacturing a plurality of lighting devices 1, it becomes possible to join case part 2 and substrate 32 with fixed press pressure.

  If the casing 2 has a different curvature for each individual, it is necessary to adjust the press pressure each time the casing 2 and the substrate 32 are pressed when a plurality of lighting devices 1 are manufactured. This is because there is a close relationship between the curvature of the casing 2 and the required pressing pressure when the casing 2 and the substrate 32 are pressed.

  Changing the press pressure not only increases the cost and the like, but also causes the possibility of detachment of the substrate 32 from the casing 2 due to poor adjustment of the press pressure. If the detachment occurs, the heat generated by the high power light emitting diode cannot be diffused to the entire housing part 2, which is a serious problem. Therefore, it is important to always bend in a certain direction when manufacturing a plurality of housing parts 2.

  Note that the amount of bending of the housing 2 (the amount of bending here refers to the length deformed in the y direction) is 200 μm when the length in the longitudinal direction is 1000 mm in the inventors' tests. Was the best.

  In FIG. 4, the illuminating device 1 causes the support 41 to emit light toward the ground direction (here, the ground direction means the floor direction if indoors, and the ground direction if outdoors). It is attached.

  A C-C ′ cross section in FIG. 4 is as shown in FIG. 8. As is apparent from this figure, the outlet 21 faces the support 41, that is, substantially in the upward direction (preferably within the range of 0 to 30 degrees with respect to the upward direction. If it is, it means the ceiling direction, and if it is outdoors, it means the sky direction.) The inflow port 5 is configured to have an angle of 45 degrees with respect to the outflow port 21. In addition, the angle of the inflow port 5 with respect to the outflow port 21 is not limited to 45 degrees, and may be arbitrarily set in accordance with the shape of the lighting device 1 and the like in a range of 0 to 90 degrees.

  The hollow portion 81 is connected to the outside of the lighting device 1 through the inflow port 5 and the outflow port 21. The hollow portion 81 preferably has a streamlined shape in part. The streamlined type here refers to a shape in which air can move smoothly on its surface.

  Here, a heat dissipation mechanism for air when the lighting device 1 is energized will be described with reference to FIG. FIG. 9 is a cross-sectional view taken along the line C-C ′ of FIG. 4, similarly to FIG. 8. The heat generated in the solid state light emitting device 31 is diffused throughout the housing portion 2 through the substrate 32 as described above. The diffused heat is released into the air using convection effectively.

  More specifically, first, the air around the casing 2 is heated by the air and becomes an ascending current. A part of the air that has become the updraft flows on the outer surface 91 of the casing 2. The air rises while receiving heat from the outer surface 91. That is, heat is released from the outer surface 91 to the air.

  Further, another part of the air that has become the updraft flows into the hollow portion 81 from the inflow port 5. The inflowing air flows out of the hollow portion 81 again from the outlet 21 while receiving the heat of the inner surface 92. This air rises while receiving the heat of the inner surface 92. That is, heat is released from the inner surface 92 to the air. At this time, air flows more smoothly because a part of the shape of the hollow portion 81 is streamlined. Therefore, the efficiency related to heat release is further increased.

  As described above, the lighting device 1 can efficiently use the effect of the ascending airflow by heating the air, that is, the convection, and can radiate heat not only from the outer surface 91 but also from the inner surface 92 (that is, Since heat can be radiated in a wide area), the heat caused by the solid state light emitting device 31 diffused throughout the casing 2 can be effectively released to the air.

  Here, since the housing | casing part 2 is comprised with aluminum, the weight of the illuminating device 1 increases compared with a general fluorescent lamp. Therefore, it is preferable to firmly fix the lighting device 1 to the support 41 for the purpose of further improving safety.

  Therefore, the lighting device 1 is fixed to the support tool 41 by the fixing tool 42. FIG. 10 is a diagram showing how the fixture 42 is actually attached to the lighting device 1, and FIG. 11 is a cross-sectional view taken along the line D-D ′ in FIG.

  A fixing tool 42 is attached using a notch portion in FIG. 10 and a part of the outlet 21 of the lighting device 1 as shown in FIG. That is, a part of the outlet 21 is also used as a fixing hole. By attaching the fixture 42 in this manner, the lighting device 1 can be more firmly fixed to the support 41. This makes it possible to prevent the lighting device 1 from falling from the support tool 41 even during an extreme disaster such as an earthquake.

  In addition, the illuminating device 1 of this invention is not limited to the said Example, It can deform | transform and implement freely in the range which does not deviate from the meaning of this invention. For example, in this embodiment, the lighting device 1 is fixed to the support tool 41 by the fixing tool 42 using a part of the outlet 21 as a fixing hole. The lighting device 1 may be fixed to the support 41 by the fixing tool 42 by attaching a hook or the like and using this as a fixing part.

  Moreover, it is also possible to make the illuminating device 1 ring-shaped by forming the housing | casing part 2 and the translucent board 33 for protection in a ring shape.

  Also. A plurality of fixtures 42 may be provided. By doing so, safety can be further improved.

  Further, by making the fixture 42 have good thermal conductivity such as aluminum, the heat generated in the lighting device 1 can be transferred to the support 41. Thereby, the area which radiates more becomes large, and heat dissipation is further improved. Furthermore, if it is aluminum etc., it will be a conductor and grounding with the support tool 41 of the illuminating device 1 will also be attained.

It is a figure which shows the external appearance of the illuminating device 1 of this invention. It is the figure which showed the state which looked at the illuminating device 1 shown by FIG. 1 from the A direction. It is sectional drawing which showed the state which cut | disconnected the illuminating device 1 shown by FIG. 1 by the B-B 'surface. It is an external view at the time of attaching the illuminating device 1 to the support tool 41. FIG. It is a figure which shows the curved component. It is a figure which shows the example of the combination of components 34 and 35. FIG. It is a figure which shows the housing | casing part 2 curved to concave shape. It is sectional drawing which showed the state which cut | disconnected the illuminating device 1 and the support tool 41 which were shown by FIG. 4 by the C-C 'surface. It is sectional drawing which showed the state which cut | disconnected the illuminating device 1 and the support tool 41 which were shown by FIG. 4 in the C-C 'surface, Comprising: It is a figure which shows the flow of air. It is a figure which shows how the fixing tool 42 is attached with respect to the illuminating device 1. FIG. It is sectional drawing which showed the state which cut | disconnected the illuminating device shown in FIG. 10, the support tool 41, and the fixing tool 42 by the D-D 'surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Illuminating device 2 Housing | casing part 3 Terminal part 4 Terminal pin 5 Inflow port 21 Outlet 31 Solid light emitting element 32 Board | substrate 33 Protective translucent board 41 Support tool 42 Fixing tool 81 Hollow part 91 External surface 92 Internal surface 101,102 Base Part

Claims (13)

A lighting device provided with a protection means for protecting a light emitter,
The said protection means has a fixing | fixed part used when fixing this illuminating device to a predetermined position, The illuminating device characterized by the above-mentioned. The protective means further includes a space portion having at least one hollow structure,
At least one or more first openings that are holes serving as fluid inlets into the space, and at least one or more second openings that are holes serving as fluid outlets from the space. Prepared,
The lighting device according to claim 1, wherein the fixing portion is a part of the second opening.   The lighting device according to claim 1, wherein the protection unit includes a plurality of parts.   The lighting device according to claim 3, wherein the protection unit is configured by integrating the plurality of parts by press working with an adhesive member interposed therebetween.   The lighting device according to claim 3 or 4, wherein the plurality of parts are formed to bend in a predetermined direction. Furthermore, it has a transmission means for transmitting light from the light emitter,
The lighting device according to claim 1, wherein the transmission means has conductivity.   The lighting device according to claim 6, wherein the transmissive means contains a conductive material.   The lighting device according to claim 6, wherein a film having conductivity is attached to the transmission means. The light emitter is composed of a solid light emitting element and at least one holding means for holding a predetermined number of the solid light emitting elements,
The lighting device according to claim 1, wherein the protection unit and the holding unit are integrated by press working with an adhesive member interposed therebetween.   The lighting device according to claim 9, wherein the protection unit is curved in a predetermined direction.   The lighting device according to claim 9, wherein the solid state light emitting device is a light emitting diode.   The lighting device according to claim 4, wherein the adhesive member is a double-sided tape that does not contain a base material.   The same size as any of the straight tube fluorescent lamps defined in 33.1 "List of data sheets" of JIS C7917-2 "Straight tube fluorescent lamps-Part 2: Performance specification". The lighting device described.

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