JP5577901B2 - Light source device and lighting apparatus - Google Patents

Description

  The present invention relates to a light source device and a lighting fixture including the same.

  A so-called “LED bulb” having a light emitting diode (LED) element is known. As this LED bulb, a plurality of light emitting diode elements, a substrate on which these light emitting diode elements are arranged in a matrix, a cylindrical housing for housing the light emitting diode elements together with the light emitting diode elements, and a base end portion of the housing There is one provided with a cap and a cover as a lid body installed at the tip of the housing (for example, see Patent Document 1).

  In the LED bulb described in Patent Document 1, the substrate is disposed orthogonal to the central axis of the housing. And the board | substrate arrange | positioned in this way is supported by the ring-shaped support member fitted to the inner peripheral part of a housing.

  By the way, since the light emitting diode element generates heat as it emits light, the LED bulb needs to release the heat, and it is preferable to radiate heat through the housing.

  However, in the light bulb described in Patent Document 1, the substrate and the housing are only connected via the support member, that is, the contact area between the substrate and the housing is relatively small, and thus the heat generated in the light-emitting diode element. Is not sufficiently transmitted from the substrate to the housing, and as a result, there is a problem that heat dissipation in the housing becomes insufficient.

  Further, in the LED bulb described in Patent Document 1, the light emitting diode elements are arranged in a matrix on the substrate. However, depending on the arrangement, light is not uniformly irradiated, that is, a relatively bright place under the LED bulb. There is also a problem that a relatively dark place may occur remarkably.

JP 2006-156187 A

  An object of the present invention is to provide a light source device and a lighting fixture that are excellent in heat dissipation and can irradiate light uniformly.

Such an object is achieved by the present inventions (1) to (15) below.
(1) A pair of substrates having a portion in which one surface is arranged to face each other with a gap and is made of a metal material;
At least one light emitting device provided on the other surface of each substrate, and having a light emitting diode element;
It has an opening having an opening at one end, and is configured by a cylindrical body that houses each of the substrates together with the light emitting device, and the central axis of the cylindrical body with the substrates facing each other through the gap A housing having a support portion for supporting in parallel,
The light from each light emitting device is configured to be emitted outward through the opening ,
The light source device according to claim 1, wherein the support portion includes a small piece inserted into the gap and a sandwiching piece for sandwiching the edge of each substrate together with the small piece .

  (2) The light source device according to (1), wherein the housing has a function of receiving heat from the light emitting device through each of the substrates and the support portion and radiating the heat.

  (3) The light source device according to (1) or (2), wherein the support portion supports both the substrates on both sides or cantilever the inner peripheral portion of the housing.

(4) Each of the substrates is supported on both sides via the support part,
The light source device according to (3), wherein the central axis passes through the gap.

(5) Each of the substrates is cantilevered via the support part,
The light source device according to (3), wherein a plurality of the pair of substrates are arranged around the central axis.

(6) The pair of substrates are separated from each other via a first gap,
The light source device according to (5) , wherein the plurality of sets of substrates are separated from each other by a second gap at an edge on the central axis side.

(7) In the housing, an inner peripheral surface is configured by a curved concave surface, and an internal space thereof is separated into a plurality of spaces by the plurality of sets of substrates.
When a temperature difference occurs between the spaces, air flows from the space having the higher temperature to the space having the lower temperature through the second gap. The light source device according to (6), wherein a thermal convection is generated in the air by the curved concave surface.

(8) Each said board | substrate is a laminated body which has the metal layer comprised by the said metal material, and the resin layer provided on this metal layer and comprised by the resin material, respectively (1) thru | or ( The light source device according to any one of 7) .

(9) The light source device according to any one of (1) to (8) , wherein a gap distance of the gap is 0.5 to 7.0 mm.

(10) The light source device according to any one of (1) to (9) , wherein the housing is made of a metal material.

(11) The light source device according to any one of (1) to (10) , wherein a light reflecting portion that reflects light from each light emitting device is installed on an inner peripheral portion of the housing.

(12) The light source device according to any one of (1) to (11) , wherein each of the light emitting devices is installed such that an optical axis of emitted light is parallel to a normal line of the substrate.

(13) The light source device according to any one of (1) to (12) , wherein each of the light emitting devices is unevenly distributed on the other end side of the housing with respect to the substrate on which the light emitting device is installed.

(14) The light source device according to any one of (1) to (13) , wherein the substrate has a plurality of through holes penetrating in a thickness direction thereof.

(15) A lighting apparatus comprising the light source device according to any one of (1) to (14) .

  According to the present invention, the housing can secure a contact area with the substrate as large as possible at the support portion. And when each light-emitting device generate | occur | produces with light emission, the heat is fully and reliably transmitted to a housing through a board | substrate and a support part in order. Furthermore, the heat received by the housing is radiated from the housing to the outside. Therefore, this invention is excellent in heat dissipation.

  According to the present invention, the light from each light emitting device is diffusely reflected in the housing, and most of the light travels toward the opening of the housing. And the light which went to the opening part of the housing can be reliably radiate | emitted from the said opening part, and will be irradiated uniformly outward.

It is a perspective view which shows 1st Embodiment at the time of applying the lighting fixture of this invention to a light bulb. It is a fragmentary longitudinal cross-sectional view of the light bulb shown in FIG. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. FIG. 5 is an enlarged cross-sectional view of a region [C] surrounded by an alternate long and short dash line in FIG. 4. It is a fragmentary longitudinal cross-section which shows 2nd Embodiment at the time of applying the lighting fixture of this invention to a light bulb. It is the DD sectional view taken on the line in FIG. It is a cross-sectional view which shows 3rd Embodiment at the time of applying the lighting fixture of this invention to a light bulb. It is a side view which shows 4th Embodiment at the time of applying the lighting fixture of this invention to a light bulb. It is the EE sectional view taken on the line in FIG. It is a cross-sectional view which shows 5th Embodiment at the time of applying the lighting fixture of this invention to a light bulb.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a light source device and a lighting fixture of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

<First Embodiment>
FIG. 1 is a perspective view showing a first embodiment when the lighting fixture of the present invention is applied to a light bulb, FIG. 2 is a partial longitudinal sectional view of the light bulb shown in FIG. 1, and FIG. 4 is a cross-sectional view taken along the line BB in FIG. 2, and FIG. 5 is an enlarged cross-sectional view of a region [C] surrounded by a dashed line in FIG. 4. Hereinafter, for convenience of explanation, the upper side in FIGS. 1 to 3 (the same applies to FIGS. 6 and 9) is referred to as “upper” or “upper”, and the lower side is referred to as “lower” or “lower”.

  A light bulb (lighting fixture) 1 shown in FIG. 1 is a so-called “LED light bulb”, which is installed on the ceiling of a house, for example, and used as illumination for illuminating the house. The light bulb 1 includes a main body 11 that is a light source device, a base 12, and a cover 13. Hereinafter, the configuration of each unit will be described.

  As shown in FIGS. 2 and 3, the main body 11 includes a cylindrical housing (housing) 2, two (a pair of) substrates 3 a and 3 b housed in the housing 2, and substrates 3 a and 3 b. Two light emitting devices 4, two reflectors (light reflecting portions) 5 that reflect the light L from each light emitting device 4, and an inverter circuit 6 housed in the housing 2 are provided.

  The base 12 is installed at the upper end (upper end opening 23) of the housing 2. The base 12 is specified by the JIS standard or the like and is attached to a light bulb socket (not shown). In this mounted state, the base 12 can receive power from a commercial power source.

  The cover 13 is installed so as to cover the lower end portion (lower end opening 22) of the housing 2. The cover 13 is fixed to the housing 2 by fitting, for example.

  The cover 13 is made of a transparent resin material or glass material. The cover 13 may be provided with irregularities in order to diffuse the light L from each light emitting device 4. The cover 13 may be provided with a phosphor that emits light when excited by the light L from each light emitting device 4.

  The housing 2 of the main body 11 is a cylinder having both ends opened, that is, a lower end opening (opening) 22 whose lower end (one end) is opened, and an upper end opening 23 whose upper end (the other end) is opened. Consists of the body. Further, the inner diameter and the outer diameter of a portion of the housing 2 in the middle of the direction of the central axis 21 are steeply changed, and the housing 2 can be divided into a lower large diameter portion 24 and an upper small diameter portion 25.

  The size of the housing 2 is such that the substrates 3a and 3b, the light emitting devices 4, the reflector 5, the inverter circuit 6 and the like can be accommodated together inside. The large diameter portion 24 of the housing 2 is provided with a support portion 26 that collectively supports the substrates 3a and 3b. The support portion 26 will be described later.

  The housing 2 is made of a metal material. Specifically, for example, various metals such as iron, nickel, stainless steel, copper, brass, aluminum, titanium, and magnesium, or alloys containing them can be used. Among these, aluminum is particularly preferable. Aluminum is a material having a relatively high thermal conductivity. When the housing 2 is made of aluminum, the housing 2 is excellent in heat dissipation. Furthermore, if the outer surface of the housing 2 is subjected to chemical or physical treatment such as alumite treatment, the heat radiation efficiency is increased, which is preferable from the viewpoint of heat dissipation.

  As shown in FIGS. 2 and 3, the large-diameter portion 24 of the housing 2 accommodates the substrates 3 a and 3 b that are rectangular in plan view together with the light emitting device 4. The substrates 3a and 3b are arranged so that their back surfaces (one surface) 381 face each other via a gap 39, and are supported by the support portion 26 in parallel with the central axis 21 of the housing 2 in this facing state.

  Each of the substrates 3 a and 3 b has two light emitting devices 4 mounted on the surface (the other surface) 382, and is electrically connected to the inverter circuit 6 through the lead wire 20. Each light emitting device 4 emits light under the control of the inverter circuit 6.

  As shown in FIG. 2, the substrates 3 a and 3 b are arranged between them, that is, with the central axis 21 passing through the gap 39. Thereby, the light L from each light-emitting device 4 on the board | substrate 3a and the light L from each light-emitting device on the board | substrate 3b are irradiated symmetrically downward, for example, uniformly in a house. Can illuminate.

  Note that the gap distance d of the gap 39 is preferably 0.5 to 7.0 mm, and more preferably 2.0 to 5.0 mm. Thereby, for example, the heat generated as each light emitting device 4 emits light is transmitted from the substrate 3a to the substrate 3b or vice versa from the substrate 3a through the air in the gap 39. Is prevented or suppressed.

  Since the configurations of the substrate 3a and the substrate 3b are the same, the substrate 3a will be described below representatively.

  As shown in FIG. 5, the board | substrate 3a is comprised by the laminated body which has the metal layer 31a and the resin layer 33 formed on the metal layer 31a.

  Although it does not specifically limit as a metal material which comprises the metal layer 31a, For example, it is preferable to use the metal material similar to the constituent material of the housing 2, especially copper, aluminum, magnesium, or an alloy containing these.

  In addition, the resin material constituting the resin layer 33 is not particularly limited. For example, an epoxy resin, a phenol resin, a urea resin, a melamine resin, a polyester (unsaturated polyester) resin, a polyimide resin, which are thermosetting resins, A silicone resin, a polyurethane resin, etc. are mentioned, The thing which mixed 1 type, or 2 or more types of these can be used. Further, when the resin layer 33 is molded with the resin material, the resin material is filled with an electrically insulating and high thermal conductive filler typified by a metal oxide such as alumina or a nitride such as boron nitride. You can also.

  The board | substrate 3a of such a structure becomes the thing excellent in thermal conductivity. Thereby, the heat generated as each light emitting device 4 emits light is reliably transmitted toward the direction away from the light emitting device 4, that is, to the support portion 26. This heat is further transferred to the housing 2 via the support portion 26.

  And in the board | substrate 3a, the conductor pattern 34 is formed on the resin layer 33. FIG. The resin layer 33 functions as an insulating layer that insulates the metal layer 31 a and the conductor pattern 34.

  The conductor pattern 34 is formed by etching a metal foil laminated on the entire upper surface of the resin layer 33 into a predetermined pattern, and is electrically connected to the light emitting device 4 by, for example, solder. The conductor pattern 34 is composed of a conductive metal material, and for example, copper can be suitably used as the material. As a result, the conductor pattern 34 has a relatively small resistance value. Note that at least a part of the conductor pattern 34 may be covered with a solder resist layer (not shown).

  As described above, the two light emitting devices 4 are disposed on the surfaces 382 of the substrates 3a and 3b, respectively. The two light emitting devices 4 are separated from each other in the horizontal direction (left and right direction in FIG. 3).

  Since each light emitting device 4 has the same configuration, one light emitting device 4 on the substrate 3a will be described as a representative.

  The light emitting device 4 generates light emission by electroluminescence (EL) effect and light emission by fluorescence.

  As shown in FIG. 5, the light emitting device 4 covers a package 41 having a recess 411, a light emitting diode element (LED chip) 42 provided on the bottom surface of the recess 411 of the package 41, and the light emitting diode element 42. A translucent resin portion 43 enclosed in the recess 411 and a pair of external terminals 44 provided on the bottom of the package 41 are provided.

  The package 41 is a small piece made of an insulating material such as a resin material or a ceramic material. The package 41 is provided with wiring (not shown) that electrically connects the light emitting diode element 42 and the pair of external terminals 44.

  The light emitting diode element 42 is formed by forming a semiconductor such as GaAlN, ZnS, ZnSe, SiCGaP, GaAlAs, AlN, InN, AlInGaP, InGaN, GaN, and AlInGaN in the package 41 as a light emitting layer. In the present embodiment, the light emitting diode element 42 that emits light having a wavelength that can excite a phosphor material contained in the light-transmitting resin portion 43 described later is used. More specifically, the light emitting diode element 42 that emits blue light is used.

  The translucent resin portion 43 is composed mainly of a resin material such as an epoxy resin, a modified epoxy resin, a silicone resin, a modified silicone resin, an acrylate resin, a urethane resin, or a polyimide resin having transparency.

  In the present embodiment, the translucent resin portion 43 includes a phosphor material that is excited by the light from the light emitting diode element 42 and emits yellow light.

  The translucent resin portion 43 has a function of protecting the light emitting diode element 42 from external force, dust, moisture, and the like.

  The pair of external terminals 44 is composed of a conductive material as a main material. One external terminal 44 is an anode electrode (anode), and the other external terminal 44 is a cathode electrode (cathode). . Each external terminal 44 is composed mainly of a metal material such as Al, Ti, Fe, Cu, Ni, Ag, Au, and Pt. Each external terminal 44 is connected to a conductor pattern 34 provided on the substrate 3a by solder (not shown). In addition to the pair of external terminals 44, a heat radiating terminal (not shown) may be provided.

  In such a light emitting device 4, when a voltage is applied to the light emitting diode element 42 via the pair of external terminals 44, light emission based on the electroluminescence effect occurs in the light emitting diode element 42. By this light emission, the light L passes through the translucent resin portion 43 and is emitted to the outside. At this time, a part of the light L is reflected on the inner wall surface of the concave portion 411 of the package 41, then passes through the translucent resin portion 43 and is emitted to the outside.

  Further, the light emitting device 4 emits blue light by the EL effect of the light emitting diode element 42, and the translucent resin portion 43 is excited by a part of the blue light to emit yellow light by fluorescence, and has a complementary color relationship. White light is emitted by mixing these blue light and yellow light.

  In addition, the light emitting diode element 42 is not limited to the above-mentioned thing, For example, a monochromatic light emitting diode element, such as red, blue, and green, may be sufficient. In this case, the phosphor material may be omitted from the translucent resin portion 43. The light emitting device 4 may have a plurality of light emitting diode elements. In this case, the emission colors may be the same or different from each other.

  As shown in FIG. 2, the inverter 2 is accommodated in the housing 2 so as to extend from the upper end portion of the large diameter portion 24 to the small diameter portion 25. The inverter circuit 6 has a function of converting electric power supplied from the base 12 into electric power suitable for light emission of each light emitting device 4 (for example, converting AC voltage 100V to DC voltage 24V).

  The inverter circuit 6 includes a circuit board 61 on which a conductor pattern (not shown) is formed and a plurality of electronic components 62 provided on the circuit board 61, and is electrically connected to the base 12 via the lead wire 30. It is connected. Examples of the electronic component 62 include a transformer and an electric field capacitor.

  In the light bulb 1, the inverter circuit 6 that is supplied with electric power from a commercial power source (not shown) through the base 12 lights the plurality of light emitting devices 4, and the light L is emitted to the outside through the cover 13.

  The inverter circuit 6 having such a configuration is housed in a cylindrical casing 40 having an insulating property made of a resin material. Thereby, the insulation between the inverter circuit 6 and the housing 2 is ensured.

  The casing 40 may be filled with a resin material containing a high thermal conductive filler. With this filler, the inverter circuit 6 is sealed, and heat generated from the inverter circuit 6 can be transmitted to the housing 2. Then, the heat can be released from the housing 2 to the outside. Although it does not specifically limit as a resin material and a high heat conductive filler which comprise a filler, For example, the resin material and the high heat conductive filler which were mentioned by description about the resin layer 33 can be used.

  As shown in FIG. 2, the reflector 5 is fixed to the inner peripheral portion 241 of the large diameter portion 24 of the housing 2. The reflector 5 reflects the light L from each light emitting device 4. The method for fixing the reflector 5 to the housing 2 is not particularly limited. For example, the method is based on adhesion (adhesion using an adhesive or a solvent) or fusion (thermal fusion, high-frequency fusion, ultrasonic fusion, etc.). Examples thereof include a method, a fitting method, and a screwing method.

  The reflector 5 has a mirror surface 51 formed of a curved concave surface, that is, a mortar-shaped (dome-shaped) shape. Inside the mirror surface 51, each light emitting device 4 is arranged such that the optical axis of the light L is parallel to the normal line of the substrates 3a and 3b (see FIG. 2). Further, each light emitting device 4 is unevenly distributed on the side of the upper end opening 23 of the housing 2 with respect to the substrates 3a and 3b, and is arranged as far back as possible in the mirror surface 51.

  With such a positional relationship, the light L from each light-emitting device 4 is reflected by the mirror surface 51 without excess or deficiency, and the reflected light (light L) is surely directed downward (see FIG. 2). . Since the directivity in the emission direction of the light L is thus improved, the light L is reliably and uniformly emitted outward through the cover 13 (the lower end opening 22 of the housing 2).

  Further, as described above, since the mirror surface 51 is formed of a curved concave surface, the air in the space 52 heated (warmed) by the light L and surrounded by the mirror surface 51 (heated) is heated. Convection will easily occur. As a result, the air can contact the reflector 5 and the cover 13 while moving in the space 52, and heat is radiated through the reflector 5 and the cover 13 at that time. In this way, the light bulb 1 is reliably prevented from trapping heat in the space 52, and thus has excellent heat dissipation.

  Although it does not specifically limit as a constituent material of the reflector 5, For example, the resin material can also be used for the metal material similar to the constituent material of the housing 2, and others. The method of forming the mirror surface 51 is not particularly limited, and examples thereof include a method in which a portion of the reflector 5 where the mirror surface 51 is to be formed is plated and further subjected to mirror surface processing (mirror polishing). In the case of this method, it is possible to reduce the weight of the reflector 5 rather than separately providing, for example, a mirror member at a portion that becomes the mirror surface 51 of the reflector 5.

  As shown in FIGS. 2 to 4, a support portion 26 that supports the substrates 3 a and 3 b is provided on the inner peripheral portion 241 of the large-diameter portion 24 of the housing 2. The support 26 supports the substrates 3a and 3b in parallel with the central axis 21 of the housing 2 in a state where the substrates 3a and 3b are opposed to each other with a gap 39 therebetween (opposed state).

  The support portion 26 has a pair of small pieces 261 inserted into the gap 39. These small pieces 261 are arranged via the central axis 21 of the housing 2. And the board | substrate 3a and the board | substrate 3b have pinched the small piece 261 by each edge part 35 on either side in FIG. Further, the substrates 3a and 3b and the small pieces 261 in the sandwiched state are fixed (screwed) by bolts 263 and nuts 264. As a result, the substrates 3a and 3b are both supported by the inner peripheral portion 241 of the housing 2 via the support portion 26, so that it is ensured that they are unintentionally detached from the support portion 26 (inside the housing 2). To be prevented.

  In the support portion 26 having such a configuration, each small piece 261 is in contact with the back surface 381 of the substrate 3a and is also in contact with the back surface 381 of the substrate 3b. Thereby, the housing 2 can ensure the largest possible contact area with the board | substrates 3a and 3b. And when each light-emitting device 4 on the board | substrate 3a generate | occur | produces with light emission, the heat is transmitted to the housing 2 fully and reliably through the board | substrate 3a and the support part 26 in order. Similarly, when each light emitting device 4 on the substrate 3b generates heat with light emission, the heat is sufficiently and reliably transmitted to the housing 2 through the substrate 3b and the support portion 26 in order. Furthermore, the heat received by the housing 2 is radiated from the housing 2 to the outside. Thus, the light bulb 1 is excellent in heat dissipation.

  Further, when each light emitting device 4 on the substrate 3a (the same applies to the substrate 3b) generates heat, the heat is also transmitted to the air in the gap 39 through the substrate 3a, and from the air, the support portion 26 is also transmitted. In addition, the housing 2 beyond that is also transmitted. Thus, the heat transmitted to the housing 2 is also radiated from the housing 2 to the outside. Therefore, the heat radiation efficiency in the light bulb 1 is improved.

  Each small piece 261 may be integrally formed from the inner peripheral portion 241 of the housing 2, or may be formed separately from the housing 2 and joined to the housing 2. It may be a thing. The reflector 5 is formed with slits 53 into which the small pieces 261 are inserted (projected) in order to prevent interference with the small pieces 261 (see FIG. 2).

Second Embodiment
FIG. 6 is a partial longitudinal sectional view showing a second embodiment when the lighting fixture of the present invention is applied to a light bulb, and FIG. 7 is a sectional view taken along the line DD in FIG.

  Hereinafter, the second embodiment of the light source device and the lighting fixture of the present invention will be described with reference to these drawings, but the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted. .

  The present embodiment is the same as the first embodiment except that the number of one set substrate and the support form of the support portion for each substrate are different in two sheets.

  In the light bulb 1 </ b> A shown in FIGS. 6 and 7, two sets of substrates 3 a and 3 b are arranged at equiangular intervals around the central axis 21 of the housing 2, that is, via the central axis 21.

  In each set, the substrates 3a and 3b are cantilevered as a result of the edge 35 on the inner peripheral portion 241 side of the housing 2 being screwed to the small piece 261. As a result, the edge 35 on the central axis 21 side of one set of housings 2 and the edge 35 on the central axis 21 side of the other set of housings 2 are separated from each other, and a gap 36 is formed between them. ing.

  In addition, one light emitting device 4 is installed on the surface 382 of each of the substrates 3a and 3b.

  For example, when one of the four light emitting devices 4 in FIG. 7 (light emitting device labeled with “4 ′” in FIG. 7) expires, the substrates 3a and 3b in the space 52 are exhausted. A temperature difference is generated between the right part 521 and the left part 522 in FIG. Then, air flows from the portion 522 having a high temperature toward the portion 521 having a low temperature, and the heat is trapped in the space 52 in combination with the occurrence of heat convection in the air because the mirror surface 51 is a curved concave surface. Is more reliably prevented. Thereby, the light bulb 1A is more excellent in heat dissipation. In the light bulb 1A, it can be said that the gap 36 functions as a “ventilation passage”.

<Third Embodiment>
FIG. 8 is a cross-sectional view showing a third embodiment when the lighting fixture of the present invention is applied to a light bulb.

  Hereinafter, the third embodiment of the light source device and the lighting fixture of the present invention will be described with reference to this figure, but the description will focus on differences from the above-described embodiment, and the description of the same matters will be omitted.

  The present embodiment is the same as the second embodiment except that the number of one set substrate is different for two sheets.

  In the light bulb 1 </ b> B shown in FIG. 8, four sets of substrates 3 a and 3 b are arranged around the central axis 21 of the housing 2 at equiangular intervals. Thereby, for example, the number of the light emitting devices 4 is increased as compared with the light bulb 1A of the second embodiment, and the illuminance can be increased accordingly. Thus, the structure of the present embodiment (arrangement of the four sets of substrates 3a and 3b) is effective when it is desired to increase the illuminance.

<Fourth embodiment>
FIG. 9 is a side view showing a fourth embodiment when the lighting fixture of the present invention is applied to a light bulb, and FIG. 10 is a cross-sectional view taken along line EE in FIG.

The fourth embodiment of the light source device and the lighting fixture of the present invention will be described below with reference to these drawings, but the description will focus on differences from the above-described embodiments, and the description of the same matters will be omitted. .
This embodiment is the same as the first embodiment except that the shape of the substrate is different.

  In the light bulb 1 </ b> C shown in FIGS. 9 and 10, a large number of through holes 37 that penetrate in the thickness direction are formed in the substrates 3 c and 3 d so as to surround each light emitting device 4. These through holes 37 are arranged in a matrix so that the interval (pitch) between the adjacent through holes 37 is the same. Further, these through holes 37 are circular in a plan view and have the same diameter.

  For example, when one of the four light-emitting devices 4 in FIG. 10 (light-emitting device labeled with “4 ′” in FIG. 10) has expired, the substrates 3c and 3d in the space 52 Thus, a temperature difference occurs between the upper part 523 and the lower part 524 in the figure. Then, air flows from the high temperature portion 523 toward the low temperature portion 524 through each through hole 37, and the mirror surface 51 described above is a curved concave surface as in the second embodiment. Coupled with the occurrence of heat convection in the air, it is more reliably prevented that heat is trapped in the space 52. Thereby, the light bulb 1C is more excellent in heat dissipation. In the light bulb 1 </ b> C, it can be said that each through-hole 37 functions as an “air passage”.

  Further, for example, when the light emitting device 4 ′ is cut off, a difference in illuminance is likely to occur between the light L illuminated on the portion 523 side and the light L illuminated on the portion 524 side. Therefore, the difference between the illuminances can be prevented from occurring. Thereby, even if one light emitting device 4 is cut off, the light bulb 1C is irradiated with the uniform light L as a whole, and therefore, a bright portion and a dark portion are generated in the portion where the light L hits the house. Is prevented.

For example, a punching process can be used to form the through hole 37.
The through holes 37 are not limited to those having the same size, and may be different from each other, for example.

  Further, the arrangement density of the through holes 37 may decrease in a direction away from the light emitting device 4.

<Fifth Embodiment>
FIG. 11 is a cross-sectional view showing a fifth embodiment when the lighting fixture of the present invention is applied to a light bulb.

  Hereinafter, a light source device and a lighting fixture according to a fifth embodiment of the present invention will be described with reference to these drawings. However, differences from the above-described embodiment will be mainly described, and description of similar matters will be omitted. .

  The present embodiment is the same as the first embodiment except that the form of the support portion for each substrate is different.

  In the light bulb 1D shown in FIG. 11, as a support portion 26 that supports both the substrates 3a and 3b, in addition to the small piece 261 inserted between the substrates 3a and 3b, the edge 35 of the substrate 3a is sandwiched together with the small piece 261. The small piece 262a to be held and the small piece 262b to sandwich the edge portion 35 of the substrate 3b are formed to protrude from the inner peripheral portion 241 of the housing 2.

  The substrates 3a and 3b are screwed to small pieces 261, 262a and 262b which are sandwiching pieces. Thereby, the clamping state with respect to the board | substrates 3a and 3b is maintained, Therefore, it is prevented reliably that the board | substrates 3a and 3b detach | leave from the support part 26 unintentionally.

  In the support portion 26 having such a configuration, each small piece 261 abuts on the back surface 381 of the substrates 3a and 3b, each small piece 262a abuts on the surface 382 of the substrate 3a, and each small piece 262b abuts on the surface 382 of the substrate 3b. It will be in the state. Thereby, the housing 2 can ensure the contact area with the board | substrates 3a and 3b as much as possible. And when each light-emitting device 4 on the board | substrate 3a generate | occur | produces with light emission, the heat | fever is fully and reliably transmitted to the housing 2 through the board | substrate 3a and the support part 26 (small piece 261,262a) in order. Similarly, when each light emitting device 4 on the substrate 3b generates heat with light emission, the heat is sufficiently and reliably transmitted to the housing 2 through the substrate 3b and the support portions 26 (small pieces 261, 262b) in this order. . Furthermore, the heat received by the housing 2 is radiated from the housing 2 to the outside. Thus, the light bulb 1D is more excellent in heat dissipation.

  Each small piece 262 may be formed integrally with the inner peripheral portion 241 of the housing 2, or may be formed separately from the housing 2 and joined to the housing 2. It may be a thing.

  As mentioned above, although the illustrated embodiment of the light source device and the lighting fixture of the present invention has been described, the present invention is not limited to this, and each part constituting the light source device and the lighting fixture exhibits the same function. It can be replaced with any configuration obtained. Moreover, arbitrary components may be added.

  Moreover, the light source device and the lighting fixture of the present invention may be a combination of any two or more configurations (features) of the above embodiments.

  Further, the lighting fixture of the present invention can be applied to a light bulb as described above. In that case, for example, it can be applied to ceiling lighting such as a downlight, indirect lighting such as a spotlight, and a light emitting light source such as a projector. it can.

  Further, the substrate on which the light emitting device is installed may have a function of reflecting light from the light emitting device.

1, 1A, 1B, 1C, 1D Light bulb (lighting fixture)
11 Body 12 Base 13 Cover 2 Housing (Housing)
21 Central axis 22 Lower end opening (opening)
23 Upper end opening portion 24 Large diameter portion 241 Inner circumference portion 25 Small diameter portion 26 Support portion 261, 262a, 262b Small piece 263 Bolt 264 Nut 3a, 3b, 3c, 3d Substrate 31a Metal layer 33 Resin layer 34 Conductive pattern 35 Edge portion 36 Gap 37 Through-hole 381 Back side (one side)
382 Surface (the other side)
39 Gap 4, 4 ′ Light-emitting device 41 Package 411 Recess 42 Light-emitting diode element (LED chip)
43 Translucent resin part 44 External terminal 5 Reflector (light reflection part)
51 Mirror surface 52 Space 521, 522, 523, 524 Portion 53 Slit 6 Inverter circuit 61 Circuit board 62 Electronic component 20, 30 Lead wire 40 Casing d Gap distance L Light

Claims (15)

A pair of substrates having a portion made of a metal material, one surface of which is arranged to face each other with a gap;
At least one light emitting device provided on the other surface of each substrate, and having a light emitting diode element;
It has an opening having an opening at one end, and is configured by a cylindrical body that houses each of the substrates together with the light emitting device, and the central axis of the cylindrical body with the substrates facing each other through the gap A housing having a support portion for supporting in parallel,
The light from each light emitting device is configured to be emitted outward through the opening ,
The light source device according to claim 1, wherein the support portion includes a small piece inserted into the gap and a sandwiching piece for sandwiching the edge of each substrate together with the small piece .   2. The light source device according to claim 1, wherein the housing has a function of receiving heat from the light emitting device via each of the substrates and the support and radiating the heat.   3. The light source device according to claim 1, wherein the support portion supports both the substrates on both sides or cantilever the inner peripheral portion of the housing. Each of the substrates is supported on both sides via the support part,
The light source device according to claim 3, wherein the central axis passes through the gap. Each of the substrates is cantilevered via the support part,
The light source device according to claim 3, wherein a plurality of sets of the pair of substrates are arranged around the central axis. The pair of substrates are spaced apart from each other via a first gap;
6. The light source device according to claim 5, wherein the plurality of sets of substrates are separated from each other by an edge on the central axis side through a second gap . The housing has an inner circumferential surface formed of a curved concave surface, and the internal space is divided into a plurality of spaces by the plurality of sets of substrates,
When a temperature difference occurs between the spaces, air flows from the space having the higher temperature to the space having the lower temperature through the second gap. The light source device according to claim 6, wherein thermal convection is generated in the air by the curved concave surface. Wherein each substrate, respectively, and the metallic material metal layer composed of, disposed on the metal layer, to one of the claims 1 to 7, which is a laminate having a resin layer made of a resin material The light source device described. The light source device according to any one of claims 1 to 8 , wherein a gap distance of the gap is 0.5 to 7.0 mm. The light source device according to claim 1 , wherein the housing is made of a metal material. The light source device according to any one of claims 1 to 10 , wherein a light reflecting portion that reflects light from each light emitting device is provided on an inner peripheral portion of the housing. 12. The light source device according to claim 1 , wherein each of the light emitting devices is installed such that an optical axis of emitted light is parallel to a normal line of the substrate. The light source device according to claim 1 , wherein each of the light emitting devices is unevenly distributed on the other end side of the housing with respect to the substrate on which the light emitting device is installed. The light source device according to claim 1 , wherein the substrate has a plurality of through holes penetrating in a thickness direction thereof. A lighting apparatus comprising the light source device according to claim 1 .

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