JP2012014900A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which can efficiently radiate heat generated from an HID type LED lamp when setting the HID type LED lamp to a lighting fixture.SOLUTION: In the lighting device including the lighting fixture 11 having a lighting fixture cover 12 and a base socket 13 which have designated thermal conductivity, and an LED lamp 1 having a case 2 and a base 3 which have designated thermal conductivity, wherein the base 3 is mounted on the base socket 13 of the lighting fixture 11, a support member 21 with designated thermal conductivity is arranged between the LED lamp 1 and the lighting fixture cover 12. The support member 21 has a circular shape, and comes in contact with the case 2 of the LED lamp 1 at an inner part of the circular shape, and comes in contact with the lighting fixture cover 12 at an outer part of the circular shape.

Description

  The present invention relates to a lighting device.

  FIG. 1 is a perspective view showing an example of an HID type LED lamp designed to have the same external shape as an existing HID (High Intensity Discharge) lamp, and FIG. 2 is a plan view seen from the direction A in FIG. FIG. 3 is a partially cutaway cross-sectional view taken along line BB in FIG. 1, 2, and 3, this HID type LED lamp 1 includes a housing 2 having a predetermined thermal conductivity, a base 3 for connecting to a power source, and a plurality (in this example, 5 LEDs 5 (one LED 5 is shown in FIG. 3) and an emission window 6 through which light from the plurality of LEDs 5 is emitted. Here, one LED 5 is, for example, 4 W (watts), and therefore, when five LEDs 5 are used, it is 20 W (watts). For this reason, the housing 2 of the HID type LED lamp 1 is provided with a heat sink heat dissipation structure (specifically, a fin structure 7) in order to exhibit performance equivalent to that of an existing HID lamp. The housing 2 is made of a material having high thermal conductivity (for example, a metal such as aluminum or magnesium, or a heat conductive resin containing carbon or the like in the resin).

  Such an HID type LED lamp 1 includes a lighting fixture cover 12 having a predetermined thermal conductivity (high thermal conductivity) and a base socket 13 as shown in a sectional view in FIG. The base 3 is attached to the base socket 13 for use. In FIG. 4, the HID type LED lamp 1 is shown with a part cut away as in FIG. 3.

  Here, as the lighting fixture 11, the existing lighting fixture for HID lamps can be used. That is, since the HID type LED lamp 1 is designed to have the same external shape as the existing HID lamp, the base 3 is inserted into the base socket 13 of the lighting fixture 11 for the existing HID lamp, and the existing HID lamp Can be used (ie, compatible with existing HID lamps).

  By the way, conventionally, when the HID type LED lamp 1 is set in the lighting fixture 11 and the HID type LED lamp 1 is turned on by energizing the HID type LED lamp 1, the lighting fixture 11 generally has no vent hole. Since the air between the luminaire 11 and the HID type LED lamp 1 is difficult to exchange with the outside air, the radiant heat emitted from the HID type LED lamp 1 is generated in the luminaire 11 (the luminaire 11 and the HID type LED lamp 1). There was a problem of being trapped in the LED lamp 1).

  FIG. 5 shows each part of the HID type LED lamp 1 when the HID type LED lamp 1 is turned on in a state before the HID type LED lamp 1 is set in the lighting fixture 11 (a state in which no fixture is used). Of the HID type LED lamp 1 when the HID type LED lamp 1 is turned on in the state after setting the HID type LED lamp 1 in the lighting fixture 11 (the state in which the fixture is used) The temperature measurement results are shown. In FIG. 5, the measurement point 1 is the junction (pn junction) of the LED 5 of the HID type LED lamp 1, the measurement point 2 is the housing 2 of the HID type LED lamp 1, and the measurement point 3 is the lighting fixture 11. In a state after the HID type LED lamp 1 is set, the space (air layer) between the lighting fixture 11 and the HID type LED lamp 1 and the measurement point 4 are outside air.

  From FIG. 5, when the HID type LED lamp 1 is set in the lighting fixture 11 (when the appliance is used), the state before the HID type LED lamp 1 is set in the lighting fixture 11 (use of the appliance). For example, it was found that the temperature at the measurement point 1 (that is, the junction temperature (pn junction) of the LED 5 of the HID type LED lamp 1) increased by 15 ° C. This is because the heat from the LED 5 of the HID type LED lamp 1 is HID in the state after the HID type LED lamp 1 is set in the lighting device 11 (the state in which the device is used) as shown in FIG. In the order of the housing 2 (R1), the air layer 31 (R2), the luminaire cover 12 (R3), and the air layer (outside air) 32 (R4) of the LED lamp 1 of the type, the air layer 31 (R2) having poor heat conduction ) Is conducted to the luminaire cover 12, and it is considered that heat cannot be efficiently radiated. R1, R2, R3, and R4 are heat paths.

  Thus, conventionally, when the HID type LED lamp 1 is set in the luminaire 11, the heat from the LED 5 of the HID type LED lamp 1 cannot be efficiently radiated. There is a problem that the lifetime of the LED lamp 1 is shortened, and the luminous efficiency of the LED 5 is lowered due to the increase in the temperature of the junction (pn junction) of the LED 5 of the HID type LED lamp 1.

  Moreover, since the HID type LED lamp 1 as described above employs a heat sink heat dissipation structure (specifically, fin structure 7) in the housing 2, the weight is about 50% that of an existing HID lamp. It will be heavy. Specifically, the weight of the existing HID lamp is 220 g, whereas the weight of the HID type LED lamp 1 is 340 g. For this reason, when the HID type LED lamp 1 is set in the luminaire 11 and is used with an inclination as shown in FIG. 7, for example, with respect to the direction G in which gravity acts, the HID type lamp is compared with the existing HID lamp. Since the LED lamp 1 is heavy, as shown in FIG. 7, the HID type LED lamp 1 is likely to be in a mounted state shifted from the center of the luminaire 11 in the direction G of gravity, and correct irradiation in the target direction is achieved. There were also problems such as being unable to do so.

  An object of the present invention is to provide an illumination device capable of efficiently dissipating heat from an HID type LED lamp when an HID type LED lamp is set in a lighting fixture.

  In addition, the present invention can also effectively prevent the HID type LED lamp from being displaced from the center of the lighting fixture in the direction of gravity when the HID type LED lamp is set in the lighting fixture. It aims to provide a simple lighting device.

  In order to achieve the above object, an invention according to claim 1 includes a lighting fixture having a lighting fixture cover and a base socket having a predetermined thermal conductivity, a housing having a predetermined thermal conductivity, and a base. And a lighting device including an LED lamp mounted on a base socket of the lighting fixture, wherein a support member having a predetermined thermal conductivity is provided between the LED lamp and the lighting fixture cover. The support member is annular, and is in contact with the housing of the LED lamp at an inner portion of the annular shape, and is in contact with the luminaire cover at an outer portion of the annular shape. It is a feature.

  According to a second aspect of the present invention, in the illuminating device according to the first aspect, the support member has an elastic structure in an annular outer portion that abuts the luminaire cover.

  According to the first aspect of the present invention, the lighting device includes a lighting device cover having a predetermined thermal conductivity and a base socket, a housing having a predetermined thermal conductivity, and a base. A lighting device including an LED lamp having a base mounted on a base socket, wherein a support member having a predetermined thermal conductivity is provided between the LED lamp and the lighting fixture cover, and the support member Is in an annular shape and is in contact with the housing of the LED lamp at the inner portion of the annular shape and is in contact with the luminaire cover at the outer portion of the annular shape. When set, the heat from the LED lamp can be efficiently radiated.

  According to a second aspect of the present invention, in the illuminating device according to the first aspect, the support member has an elastic structure in an annular outer portion that abuts the luminaire cover. When the LED lamp is set, the heat from the LED lamp can be efficiently radiated, and the LED lamp can be effectively prevented from shifting in the direction in which gravity acts from the center of the lighting fixture.

It is a perspective view which shows an example of the HID type LED lamp designed to the same external shape as the existing HID lamp. It is the top view seen from the A direction of FIG. FIG. 3 is a partially cutaway sectional view taken along line BB in FIG. 2. It is a figure which shows the state by which the nozzle | cap | die of the HID type LED lamp was mounted | worn with the nozzle | cap | die socket of the luminaire | luminum which has a lamp | ramp fixture cover with a predetermined | prescribed thermal conductivity, and a nozzle | cap | die socket. The temperature measurement result of each part of the HID type LED lamp when the HID type LED lamp is lit in the state before the HID type LED lamp is set in the lighting fixture (the state in which the fixture is not used), and the lighting fixture It is a figure which shows the temperature measurement result of each part of a HID type LED lamp when a HID type LED lamp is lighted in the state (state with instrument use) after setting an HID type LED lamp. In the structure of FIG. 4, it is a figure which shows the heat conduction of the heat | fever from LED of a HID type LED lamp. It is a figure which shows the case where an HID type LED lamp is set to a lighting fixture, and it inclines and uses with respect to the direction where gravity acts. It is a figure which shows the structural example of the supporting member (heat dissipation stay) used for the illuminating device of this invention. It is a figure which shows the state by which the annular | circular shaped main-body part of the supporting member (heat dissipation stay) was fitted by the housing | casing (housing | casing which has a fin structure) of a HID type LED lamp. It is a figure which shows the state by which the HID type LED lamp was set to the lighting fixture. Temperature measurement of each part of the HID type LED lamp when the HID type LED lamp is turned on in a state where the HID type LED lamp is mounted on a lighting fixture without attaching a support member (heat dissipating stay) having high thermal conductivity to the HID type LED lamp. The result and each part of the HID type LED lamp when the HID type LED lamp is turned on in a state where the HID type LED lamp is mounted on a lighting fixture with a support member (heat dissipating stay) having a high thermal conductivity. It is a figure which shows a temperature measurement result. It is a figure which shows the heat conduction of the heat | fever from LED of a HID type LED lamp when it is set as the state which mounted | wore with the support member (heat dissipation stay) with high heat conductivity to the HID type LED lamp. It is a figure which shows the other example of a supporting member (heat dissipation stay).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  Also in the illuminating device of the present invention, basically, an HID type LED lamp 1 similar to that shown in FIGS. 1, 2, and 3 and an illumination having a predetermined thermal conductivity as shown in FIG. A lighting fixture 11 having a fixture cover 12 and a base socket 13 is used, and the HID type LED lamp 1 is used with the base 3 attached to the base socket 13 of the lighting fixture 11. In the following, it is assumed that the configurations and materials of the HID type LED lamp 1 and the lighting fixture 11 are the same as those described in the background art.

  That is, this HID type LED lamp 1 also includes a housing 2 having a predetermined thermal conductivity, a base 3 for connecting to a power source, and a plurality of (as shown in FIGS. In this example, there are 5) LEDs 5 and an exit window 6 through which light from the plurality of LEDs 5 is emitted. Here, one LED 5 is, for example, 4 W (watts), and therefore, when five LEDs 5 are used, it is 20 W (watts). For this reason, the housing 2 of the HID type LED lamp 1 is provided with a heat sink heat dissipation structure (specifically, a fin structure 7) in order to exhibit performance equivalent to that of an existing HID lamp. The housing 2 is made of a material having high thermal conductivity (for example, a metal such as aluminum or magnesium, or a heat conductive resin containing carbon or the like in the resin).

  The luminaire cover 12 is formed of a metal having a high thermal conductivity (for example, aluminum).

  By the way, in the present invention, an annular support member (heat dissipating stay) having a predetermined thermal conductivity is provided between the housing 2 of the HID type LED lamp 1 and the luminaire cover 12 of the luminaire 11. It has become. FIGS. 8A and 8B are diagrams showing a configuration example of a support member (heat dissipating stay) used in the lighting device of the present invention. 8A is a perspective view, and FIG. 8B is a plan view seen from the direction of arrow C in FIG. 8A.

  Referring to FIGS. 8A and 8B, the support member (heat dissipating stay) 21 includes a material having a predetermined thermal conductivity (for example, a metal conductive material, or carbon in the resin, for example). A material having high thermal conductivity, such as a thermal conductive resin.

  8A and 8B, the support member (heat dissipating stay) 21 is formed in a U-shape on the outside along the annular main body 22 and the annular ring of the annular main body 22. And a plurality of U-shaped portions 23 bent in a straight line. The annular main body 22 includes a portion 25 that contacts the housing 2 of the HID type LED lamp 1 and a portion 26 that fits (contacts) the fin structure 7 of the housing 2.

  With such a configuration, the inner part of the support member (heat dissipating stay) 21 is fitted (abuts) on the housing 2 of the HID type LED lamp 1 (the housing 2 having the fin structure 7). That is, in the example of FIGS. 8A and 8B, the inner portion of the annular main body 22 of the support member (heat dissipating stay) 21 has the housing 2 (fin structure 7) of the HID type LED lamp 1. It fits (contacts) the housing 2). 9A and 9B show a state in which a support member (heat dissipating stay) 21 is fitted (contacted) to the housing 2 of the HID type LED lamp 1 (the housing 2 having the fin structure 7). It is shown. 9A is a perspective view, and FIG. 9B is a plan view seen from the direction of arrow C in FIG. 9A. Here, the inner portion of the annular main body 22 of the support member (heat dissipating stay) 21 is in contact with the housing 2 of the HID type LED lamp 1 (the housing 2 having the fin structure 7) with as wide a contact area as possible. 8A, 8B, 9A, and 9B, the inner portion of the annular main body 22 of the support member (heat dissipating stay) 21 is an HID type LED. The side surface of the fin structure 7 of the housing 2 of the lamp 1 is also in contact with the surface of the housing 2 between the adjacent fin structures 7.

  Further, when the HID type LED lamp 1 is set on the lighting fixture 11 (that is, when the base 3 of the HID type LED lamp 1 is mounted on the base socket 13 of the lighting fixture 11), a support member (heat dissipating stay) The outer portion 21 is in contact with the luminaire cover 12 of the luminaire 11. That is, in the examples of FIGS. 8A, 8 </ b> B, 9 </ b> A, and 9 </ b> B, the plurality of U-shaped portions 23 of the support member (heat dissipating stay) 21 are provided with the luminaire cover 12 of the luminaire 11. It comes to contact with. FIGS. 10A and 10B show a state when the HID type LED lamp 1 is set on the lighting fixture 11. 10A is a perspective view, and FIG. 10B is a partially cutaway cross-sectional view taken along line BB in FIG. 10A. Here, the outer portion of the support member (heat dissipating stay) 21 is preferably in contact with the luminaire cover 12 of the luminaire 11 with a contact area as wide as possible. Specifically, in the examples of FIGS. 8A, 8 </ b> B, 9 </ b> A, 9 </ b> B, 10 </ b> A, 10 </ b> B, a plurality of U-shaped support members (heat dissipating stays) 21 are formed. The part 23 is preferably divided as many as possible, and all of the plurality of U-shaped parts 23 of the support member (heat dissipating stay) 21 come into contact with the luminaire cover 12 of the luminaire 11. It is good to have.

  As can be seen from FIG. 10B (as shown in detail in FIG. 12 to be described later), the heat from the LED 5 of the HID type LED lamp 1 is the heat of the housing 2 (T1) of the HID type LED lamp 1 and the heat. Support member (heat dissipating stay) 21 (T2) having high thermal conductivity in the order of support member (heat dissipating stay) 21 (T2) having high conductivity, lighting fixture cover 12 (T3), and air layer (outside air) 32 (T4). ) Is conducted to the luminaire cover 12, so that heat can be radiated very efficiently. T1, T2, T3, and T4 are heat paths.

  FIG. 11 shows the HID type when the HID type LED lamp 1 is turned on in a state where the HID type LED lamp 1 is set on the lighting fixture 11 without mounting the support member (heat radiating stay) 21 having a high thermal conductivity. The temperature measurement result of each part of the LED lamp 1 and the HID type LED lamp 1 in the state where the HID type LED lamp 1 is mounted on the lighting fixture 11 with the support member (heat dissipating stay) 21 having a high thermal conductivity attached. The temperature measurement result of each part of the HID type LED lamp 1 when is turned on is shown. In FIG. 11, the measurement point 1 is the junction (pn junction) of the LED 5 of the HID type LED lamp 1, the measurement point 2 is the housing 2 of the HID type LED lamp 1, and the measurement point 3 is the lighting fixture 11. In a state after the HID type LED lamp 1 is set, the space (air layer) between the lighting fixture 11 and the HID type LED lamp 1 and the measurement point 4 are outside air.

  From FIG. 11, when a support member (heat dissipation stay) 21 with high thermal conductivity is attached to the HID type LED lamp 1, the support member (heat dissipation stay) 21 with high thermal conductivity is attached to the HID type LED lamp 1. It has been found that, for example, the temperature at the measurement point 1 (that is, the temperature of the junction (pn junction) of the LED 5 of the HID type LED lamp 1) can be significantly reduced to 15 ° C., compared with the case where it is not mounted. This is because when the HID type LED lamp 1 is mounted with a support member (heat dissipating stay) 21 having high thermal conductivity, the heat from the LED 5 of the HID type LED lamp 1 is HID as shown in FIG. Type LED lamp 1 housing 2, support member (heat dissipation stay) 21 with high thermal conductivity, lighting fixture cover 12, air layer (outside air) 32 in this order, support member (heat dissipation stay) 21 with high thermal conductivity This is because heat is directly conducted to the luminaire cover 12 via, so that heat can be efficiently radiated.

  Thus, according to the present invention, the support member 21 having a predetermined thermal conductivity is provided between the HID type LED lamp 1 and the luminaire cover 12, and the support member 21 has an annular shape. Since the ring-shaped inner portion is in contact with the housing 2 of the HID type LED lamp 1 and the ring-shaped outer portion is in contact with the lighting fixture cover 12, the HID type LED is attached to the lighting fixture 11. When the lamp 1 is set, the heat from the HID type LED lamp 1 can be efficiently radiated. Thereby, the lifetime of the HID type LED lamp 1 can be extended, and the decrease in the light emission efficiency of the LED 5 can be prevented.

  9A, 9 </ b> B, and 10, in the luminaire 11, the opening diameter (or opening width) of the luminaire cover 12 is narrowed toward the cap socket 13. Here, the annular main body 22 of the support member (heat dissipating stay) 21 becomes the HID type LED lamp 1 so that the plurality of U-shaped portions 23 of the support member (heat dissipating stay) 21 face the cap socket 13. At this time, the plurality of U-shaped portions 22 abut on the luminaire cover 12 and act as elastic members (spring members) that press the luminaire cover 12 outward (in the direction of arrow H in FIG. 10). . As described above, the provision of the plurality of U-shaped portions 22 as the elastic members (spring members) has an effect of directing the HID type LED lamp 1 toward the center (self-alignment), and FIG. Even when tilted and used, the HID type LED lamp 1 can be effectively prevented from shifting from the center of the luminaire 11 in the direction G in which gravity acts.

  In the above-described example, the support member (heat dissipating stay) 21 includes an annular main body 22 and a plurality of U-shaped bent outwardly along the annular ring of the annular main body 22. Although the shape portion 23 is included (the luminaire cover 12 is also illustrated as an annular shape), the support member (heat dissipating stay) 21 and the luminaire cover 12 are annular shapes. It is not limited to this, and it may be an annular shape such as a square, a pentagon, or a hexagon. That is, the support member (heat dissipating stay) 21 and the luminaire cover 12 may be annular. Here, in the present invention, the annular shape is not limited to a shape that is completely connected in an annular shape, but is a shape in which a portion of the annular shape is interrupted as shown in FIGS. 13 (a) and 13 (b) (FIG. 13 ( It is assumed that a) and (b) also include an interrupted portion indicated by reference numeral 40. 13A is a perspective view, and FIG. 13B is a plan view seen from the direction of arrow C in FIG.

  In other words, according to the present invention, the support member 21 having a predetermined thermal conductivity (high thermal conductivity) is provided between the housing 2 of the HID type LED lamp 1 and the lighting fixture cover 12 of the lighting fixture 11. The support member 21 is provided in an annular shape, and is in contact with the housing 2 of the HID type LED lamp 1 at the inner portion of the annular shape, and the luminaire cover of the luminaire 11 at the outer portion of the annular shape. As long as the HID type LED lamp 1 is set in the lighting fixture 11, the heat from the HID type LED lamp 1 can be efficiently radiated. Is obtained.

  In the above-described example, the elastic member (spring member) is configured as a plurality of U-shaped portions 22, but the support member 21 has an elastic structure in an annular outer portion that contacts the lighting fixture cover 12. The elastic structure is not limited to the plurality of U-shaped portions 22, and any elastic structure may be used as long as it presses the lighting fixture cover 12 in the outer direction (the direction of the arrow H in FIG. 10). Can be used.

  In other words, according to the present invention, when the support member 21 has an elastic structure in the outer portion of the annular shape that comes into contact with the luminaire cover 12, the HID type LED lamp 1 is set in the luminaire 11. In addition, the heat from the HID type LED lamp 1 can be efficiently radiated, and the HID type LED lamp 1 can be effectively prevented from being displaced from the center of the lighting fixture 11 in the direction in which gravity acts. .

  Moreover, the illuminating device of this invention mentioned above can be used for a spotlight, a downlight, etc., for example.

  The present invention can be used for general illumination such as spotlights and downlights.

1 LED lamp of HID type 2 Housing 3 Base 5 LED
6 Outgoing window 7 Fin structure 11 Lighting fixture 12 Lighting fixture cover 13 Base socket 21 Support member (heat dissipating stay)
22 annular body 23 multiple U-shaped parts

Claims (2)

An LED lamp having a lighting fixture cover and a base socket having a predetermined thermal conductivity, a casing and a base having a predetermined thermal conductivity, and the base is mounted on the base socket of the lighting fixture A support member having a predetermined thermal conductivity is provided between the LED lamp and the luminaire cover, and the support member has an annular shape, An illuminating device, wherein the inner portion of the annular shape contacts the casing of the LED lamp, and the outer portion of the annular shape contacts the luminaire cover. The lighting device according to claim 1, wherein the support member has an elastic structure in an outer portion of an annular shape that contacts the lighting fixture cover.

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