JP2011100664A - Led light source device and lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently cool down LEDs and thermally separate the LEDs and a control part of them to be hardly thermally affected. <P>SOLUTION: The device is provided with a first casing for housing an LED substrate mounting the LEDs, a second casing for housing a control part controlling the LEDs, and a coupling member for coupling the casings to form a space opened toward outside between the first and second casings. The first casing has a first heat radiating fin formed having a thermal conductivity larger than that of the coupling member, fitted separately from the second casing. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a light source device using a light emitting diode (hereinafter referred to as LED).

  Conventionally, as a light source device using LEDs, as shown in Patent Document 1, a first casing (cover and base) that houses an LED substrate on which LEDs are mounted, and a second casing that houses a drive circuit unit. Some include a casing (circuit housing portion) and a holding column that connects the first casing and the second casing. And in order to discharge | release the heat | fever which arises from LED to external air, a thermal radiation part is provided in the holding | maintenance pillar, and it is comprised so that the heat which arises from LED may be transmitted to a thermal radiation part from a retention | holding pillar.

  However, in the light source device described above, the heat from the LED is transmitted only to the heat radiating portion because the holding column connecting the first casing and the second casing is interposed to transmit the heat from the LED to the heat radiating portion. However, there is a problem that it is transmitted to the second casing. In addition, when the drive circuit unit is hotter than the LED, there is a problem that heat from the drive circuit unit is transmitted to the first casing.

  Further, in the above light source device, the heat radiating portion includes a cylindrical inner holding tube, a corrugated heat radiating fin provided on the outer peripheral surface of the inner holding tube, and an outer holding tube held from the outside of the heat radiating fin. Therefore, since the radiating fins are not opened to the outside, it is conceivable that the contact with the outside air is restricted and the radiating efficiency is deteriorated.

  Further, as shown in Patent Document 2, a first casing (a plate-like portion and a cover member) that houses an LED substrate, a second casing (a lower casing) that houses a control circuit, a first casing, and a first casing There is a thing provided with the case which connects two casings over those side peripheral surfaces. And while providing the thermal radiation member thermally joined with the LED board inside the housing | casing, the opening part is formed in the said housing | casing.

  However, although the opening is provided, since the heat dissipation member is provided inside the housing, there is a problem that the contact with the outside air is restricted and the heat dissipation efficiency is poor.

JP 2008-293753 A JP 2008-204671 A

  Accordingly, the present invention has been made to solve the above-mentioned problems all at once, and enables the LED to be efficiently cooled and thermally separates the LED and the control unit for controlling the LED from each other. The main issue is to make it difficult to influence.

  That is, the LED light source device according to the present invention includes a first casing that houses an LED board on which LEDs are mounted, a second casing that houses a control unit that controls the LEDs, the first casing, and the first casing. A connecting member that connects the casings to each other so as to form a space open to the outside between the two casings, wherein the first casing has a heat conductivity that is greater than the thermal conductivity of the connecting member. A first heat dissipating fin having a rate, wherein at least a part of the first heat dissipating fin is located outside the connecting member and is spaced apart from the second casing. And

  In such a case, the LED board is accommodated in the first casing, the control unit is accommodated in the second casing, and the casings are connected to each other so as to form an open space by a connecting member. Therefore, it is possible to make it difficult to transfer heat from the LED to the control unit. Moreover, since at least one part of the 1st radiation fin is located in the outer side of a connection member, the fall of the thermal radiation efficiency produced by a connection member can be suppressed as much as possible. In addition, the first casing is provided with a first radiating fin, the radiating fin is provided apart from the second casing, and the heat transmitted through the first radiating fin is transmitted to the second casing, so that Insufficient separation can be prevented. In addition, since the thermal conductivity of the first radiating fin is larger than that of the connecting member, heat generated by the LED is easily transferred to the first radiating fin, and is transferred to the second casing via the connecting member. Can be prevented.

  In order to facilitate the heat exchange by facilitating the passage of outside air without blocking the space opened to the outside, the light quantity from the LED can be secured without blocking the light emitted from the LED. The first connecting surface to which the connecting member is connected and the second connecting surface to which the connecting member of the second casing is connected are substantially parallel, and the first heat dissipating fin is the first connecting surface. It is desirable that the first casing is formed on the side peripheral surface so as to be substantially flush with the connection surface.

  In particular, if the LED light source device is of a light bulb type, the LED light source device is provided so that the first radiating fin is located outside the fixture body in a state where the LED light source device is attached to the fixture body having a socket portion. It is desirable that If this is the case, the first heat dissipating fins are located in the device main body, thereby preventing the outside air from flowing into the open space and preventing the heat dissipating effect from being lowered.

  In addition to the heat radiation of the LED, in order to further reduce the temperature of the control unit and prevent the control unit from malfunctioning, it is desirable that the second casing is provided with a second heat radiation fin.

  In particular, if the LED light source device is of a light bulb type, the first heat radiating fin is provided outside the fixture body in a state where the LED light source device is attached to the fixture body having a socket portion. It is desirable that In this case, by disposing the second radiating fins outside the socket member, it is possible to facilitate heat exchange and cool the control unit.

  Further, a lighting fixture according to the present invention comprises a fixture body having a socket portion and a cap portion formed around the socket portion, and an LED light source device having a base portion connected to the socket portion, The LED light source device includes: a first casing that houses an LED substrate on which LEDs are mounted; a second casing that houses a control unit that controls the LEDs; and the first casing and the second casing. A connecting member for connecting the casings to each other so as to form a space open to the outside, wherein the first casing has a thermal conductivity larger than the thermal conductivity of the connecting member. One heat dissipating fin, and at least a part of the first heat dissipating fin is located outside the connecting member and spaced apart from the second casing. Further, in a state in which the LED light source device mounted on the instrument body, said first heat radiation fins and being provided so as to be located outside of the instrument body.

  According to this invention comprised in this way, while being able to cool LED efficiently, it can isolate | separate LED and the control part which controls LED thermally, and can make it hard to give a thermal influence mutually.

It is a schematic diagram which shows the structure of the lighting fixture which concerns on one Embodiment of this invention. It is a perspective view of a LED light source device. It is a side view of the LED light source device of the state attached to the lighting fixture. It is typical sectional drawing of an LED light source device. It is AA sectional view. It is a side view which shows the modification of an LED light source device.

  Hereinafter, an embodiment of a lighting fixture 100 according to the present invention will be described with reference to the drawings.

<Device configuration>
As shown in FIGS. 1 to 3, in the lighting fixture 100 according to the present embodiment, the bulb-type LED light source device 2 having a generally rotating body shape having a base portion 241 and the base portion 241 are electrically connected. An instrument body 3 having a socket portion 31 and a cap portion 32 formed around the socket portion 31. The instrument body 3 is connected to the distal end portion of the arm portion 4 so that the angle can be adjusted.

  As shown in FIGS. 2 to 4, the LED light source device 2 includes a first casing 22 having a substantially bottomed cylindrical shape that houses an LED substrate 21 on which one or a plurality of LEDs 211 are mounted, and a voltage supplied to the LEDs 211. A second casing 24 having a substantially bottomed cylindrical shape that accommodates a control unit 23 that controls the like, and a space X that is open to the outside is formed between the first casing 22 and the second casing 24. And a connecting member 25 for connecting the casings 22 and 24 to each other.

  The first casing 22 accommodates the LED substrate 21 on which the LEDs 211 are mounted and a condenser lens 26 that condenses the light emitted from the LEDs 211. The LED substrate 21 is provided in close contact with the rear end wall 221 of the first casing 22. In addition, the second casing 24 has a base part 241 connected to the socket part 31 at one end, and accommodates a control part 23 that controls and supplies the power supplied from the base part 241 to the LED 211 inside. is doing. In FIG. 4, wiring between the base part 241 and the control part 23 is omitted.

  As shown in FIGS. 3 and 4, the connecting member 25 connects the rear end surface 22 a of the first casing 22 and the front end surface 24 a of the second casing 24. As shown in FIG. 5, there are three connection members 25 of the present embodiment, which are arranged so as to be positioned at the apexes of an equilateral triangle, and the planar rear end surface 22 a of the first casing 22 and the second casing 24. It connects so that the planar front end surface 24a may become substantially parallel. In this manner, the plurality of connecting members 25 are provided at equal intervals to prevent the temperature distribution from being biased. By this connecting member 25, a space X opened to the outside is formed between the rear end surface 22 a of the first casing 22 and the front end surface 24 a of the second casing 24.

  Accordingly, the first casing 22 of the present embodiment is provided with the first heat radiation fins 22F, and the second casing 24 is provided with the second heat radiation fins 24F.

  Both the first radiating fins 22 </ b> F and the second radiating fins 24 </ b> F have higher thermal conductivity than the connecting member 25. Specifically, the heat conductivity of the heat radiation fins 22F and 24F is larger than the heat conductivity of the connecting member 25, and the heat radiation fins 22F and 24F are formed using a metal having a high heat conductivity. Copper or aluminum can be considered.

  Further, the first heat radiation fins 22 </ b> F and the second heat radiation fins 24 </ b> F are formed so that at least a part thereof is located outside the connecting member 25. In the present embodiment, the first radiating fins 22 </ b> F and the second radiating fins 24 </ b> F are formed so as to be located on the radially outer side of the connecting member 25. Thereby, when outside air hits the radiation fins 22F and 24F, it is prevented from being blocked by the connecting member 25, and heat exchange of the radiation fins 22F and 24F can be performed efficiently.

  The first radiating fins 22 </ b> F are provided away from the second casing 24, and the second radiating fins 24 </ b> F are provided away from the first casing 22. Specifically, the first radiation fin 22F is formed by a fin forming member FM1 provided in close contact with a first connection surface (rear end surface 22a) to which the connecting member 25 of the first casing 22 is connected. . Further, the second radiation fin 24F is formed by a fin forming member FM2 provided in close contact with a second connection surface (tip surface 24a) to which the connecting member 25 of the second casing 24 is connected. These fin forming members FM1 and FM2 have a substantially disk shape, and in a state where the fin forming members FM1 and FM2 are attached in close contact with the casings 22 and 24, the radiating fins 22F and 24F are flanged outside the casings 22 and 24, respectively. It is formed in a shape.

  Further, the first heat radiation fins 22F and the second heat radiation fins 24F formed as described above are located outside the cap portion 32 in a state where the base portion 241 of the LED light source device 2 is connected to the socket portion 31. It is configured. Thereby, while making it easy for outside air to hit the radiation fins 22F and 24F, the outside air can easily pass through the space X formed by the connecting member 25, and the heat radiation efficiency can be solidified.

Next, the heat transfer aspect of the LED light source device 2 of this embodiment is demonstrated.
Heat generated by the LED 211 is transmitted to the rear end wall 221 of the first casing 22 through the LED substrate 21. The LED substrate 21 is thermally connected to the rear end wall 221 of the first casing 22. Specifically, the back surface of the LED substrate 21 is provided in surface contact with the rear end wall 221 of the first casing 22. The heat transmitted to the rear end wall 221 of the first casing 22 is passed through the fin forming member FM1 that forms the first heat radiation fin 22F provided in close contact with the rear end surface 22a of the first casing 22. It is transmitted to the first radiating fin 22F and cooled by the outside air.

  On the other hand, the heat generated by the control unit 23 is transmitted to the distal end wall 241 of the second casing 24 through a fixing member (not shown) that fixes the control unit 23. Then, the heat transmitted to the tip wall 241 of the second casing 24 passes through the fin forming member FM2 that forms the second radiation fin 24F provided in close contact with the tip surface 24a of the second casing 24. 2 is transmitted to the heat radiating fins 24F and cooled by the outside air.

<Effect of this embodiment>
According to the lighting fixture 100 according to the present embodiment configured as described above, the LED substrate 21 is accommodated in the first casing 22, the control unit 23 is accommodated in the second casing 24, and the casings 22, 24 are Since the connection member 25 is connected so as to form a space X opened to the outside, it is difficult to transfer heat from the LED 211 to the control unit 23, and it is also difficult to transfer heat from the control unit 23 to the LED 211. can do.

  Moreover, since at least one part of the 1st radiation fin 22F is located in the outer side of the connection member 25, the fall of the thermal radiation efficiency produced by the connection member 25 can be suppressed as much as possible.

  Furthermore, the first casing 22 is provided with the first radiating fins 22F, the radiating fins 22F are provided apart from the second casing 24, and the heat transmitted through the first radiating fins 22F is the second casing. It is possible to prevent the thermal separation from becoming insufficient.

  In addition, since the thermal conductivity of the first radiating fin 22F is larger than that of the connecting member 25, the heat generated by the LED 211 is easily transferred to the first radiating fin 22F, and the second casing 24 is connected via the connecting member 25. Heat transfer can be prevented.

<Other modified embodiments>
The present invention is not limited to the above embodiment.

  For example, in the above-described embodiment, the radiating fins 22F and 24F are provided in a flange shape so as to be substantially flush with the connection surfaces 22a and 24a along the side peripheral surface, but as shown in FIG. One radiating fin 22F extends toward the second casing 24 on the first connection surface 22a, and extends toward the first casing 22 on the second radiating fin 24F second connection surface 24a. You may let them. In this case, the heat radiating fins 22F and 24F may be provided radially, or may be formed to face one direction so as to be parallel to each other. Further, the shape of the radiation fins 22F and 24F may be a rod shape in addition to the belt shape.

  Moreover, although the radiation fin of the said embodiment made flat form over the whole radial direction, the radial direction outer edge part of a radiation fin is bent to the light emission side front or the light emission side rear. It may be a thing. At this time, in order to improve the passage of outside air in the radiating fin, the radiating fin may be provided with a notch to form a strip shape, or a through hole may be formed.

  Moreover, in the said embodiment, although each radiation fin is formed by the fin formation member, you may make it form integrally in each casing.

  Furthermore, each radiating fin may be provided not only in the open space formed by the connecting member but also in the open space as long as at least a part of the fin is located outside the connecting member. good. For example, each radiating fin may be provided on the outer peripheral surface of each casing so as to extend outward.

  Moreover, in the said embodiment, although the connection member made | forms a substantially columnar shape, it is not limited to this, A prismatic shape may be sufficient and a belt | band | zone shape may be made.

  Furthermore, in the said embodiment, although the radiation fin is provided in both the 1st casing and the 2nd casing, you may make it provide in either the 1st casing or the 2nd casing. For example, if the LED is heated to a temperature exceeding the allowable temperature and the control unit is within the allowable temperature, it is desirable to provide a radiation fin in the first casing. On the other hand, when the LED is within the allowable temperature and the control unit is heated to a temperature exceeding the allowable temperature, it is desirable to provide a radiation fin in the second casing.

  In addition, the lengths of the first radiating fins provided in the first casing and the second radiating fins provided in the second casing may be configured to be adjustable according to the temperature balance between the LED and the control unit. For example, if the LED is hotter than the control unit, the first radiating fin is made longer than the second radiating fin, and if the control unit is hotter than the LED, the second radiating fin is It is made longer than 1 heat radiation fin. Moreover, if LED and a control part are comparable, the length of the 1st radiation fin and the 2nd radiation fin will be made the same.

  In addition, in the said embodiment, although the fin formation member was stuck to the rear-end wall of a 1st casing, you may comprise a fin formation member as a rear-end wall of a 1st casing. At this time, the back surface of the LED substrate is provided in surface contact with the fin forming member. Thereby, the heat from the LED substrate can be transmitted to the first heat radiation fins more efficiently. Similarly, the fin forming member may be configured as a tip wall of the second casing.

  In addition, it goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

100 ... LED light source device 211 ... LED
21 ... LED board 22 ... 1st casing 23 ... Control part 24 ... 2nd casing X ... Open space 25 ... Connecting member 22F ... 1st radiation fin 24F ... Second heat radiating fins

Claims (7)

A first casing that houses an LED substrate on which the LED is mounted;
A second casing that houses a controller that controls the LED;
A connecting member that connects the casings to each other so as to form an open space between the first casing and the second casing.
The first casing has a first heat dissipating fin having a thermal conductivity larger than that of the connecting member;
An LED light source device in which at least a part of the first heat dissipating fin is located outside the connecting member and is spaced apart from the second casing. The first connection surface to which the connection member of the first casing is connected and the second connection surface to which the connection member of the second casing is connected are substantially parallel.
The LED light source device according to claim 1, wherein the first heat radiation fin is formed on a side peripheral surface of the first casing so as to be substantially flush with the first connection surface.   3. The LED light source device according to claim 1, wherein the first light radiating fin is provided outside the fixture body in a state where the LED light source device is attached to the fixture body having a socket portion.   The LED light source device according to claim 1, wherein the second casing is provided with a second heat radiation fin.   The LED light source device according to claim 4, wherein the second heat radiating fin is provided outside the fixture main body in a state where the LED light source device is attached to the fixture main body having a socket portion.   The LED light source device according to claim 1, 2, 3, 4, or 5, wherein the LED light source device is of a light bulb type. An LED light source device having a base part;
An instrument body having a socket part to which the base part is electrically connected and a cap part formed around the socket part, and
A first casing that houses an LED substrate on which the LED is mounted;
A second casing that houses a controller that controls the LED;
A connecting member that connects the casings to each other so as to form an open space between the first casing and the second casing.
The first casing has a first heat dissipating fin having a thermal conductivity larger than that of the connecting member;
At least a portion of the first radiating fin is located outside the connecting member, and is provided apart from the second casing;
Furthermore, the lighting fixture provided so that the said 1st radiation fin may be located in the exterior of the said instrument main body in the state which attached the said LED light source device to the said instrument main body.