JP2012069366A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens member and an optical unit capable of arranging parts in the vicinity of a light source preventing deterioration of optical performance caused by the parts mounted in the vicinity of an outer periphery of the light source.SOLUTION: A lighting fixture includes a metal support 2 having a lower surface and an upper surface, a flexible printed board 4 which is set over both the lower and upper surfaces of the metal support 2 and mounts a plurality of LEDs 3, a transparent or translucent umbrella-shaped member which is opened to the lower side and covers a periphery of the metal support 2, and a metal frame 6 directly fixed to the metal support 2 to support the umbrella-shaped member. The plurality of LEDs 3 are divided into a lower lighting group 3A mounted on the lower surface side of the metal support 2 for irradiating light downward and an upper lighting group 3B mounted on the upper surface side of the metal support 2 for irradiating light upward.

Description

  The present invention relates to a lighting apparatus using LEDs, which is suitable for lighting in a room, for example.

  In recent years, lighting fixtures using high-power white LEDs have been widely adopted. A light source mounted with such a high-powered LED raises the temperature of the LED element itself due to heat generation and shortens the product life. Therefore, it can dissipate heat by connecting metal parts, or by connecting an aluminum heat sink. It is necessary to control the temperature. For example, an aluminum substrate or a ceramic substrate having high thermal conductivity is used for heat dissipation, and heat from the LED is quickly transferred to the substrate to dissipate heat to a larger heat dissipation material (metal substrate or heat sink).

  Further, in Patent Document 1, a plurality of heat dissipation elements arranged radially by an LED mounted on a flexible substrate, a substantially hemispherical cover for covering the LEDs, and aluminum die-casting for dissipating heat from the LEDs. A light bulb-shaped lighting device including a fin and a radiator body that is a heat sink that supports a plurality of radiation fins is described. In this illuminating device, heat is efficiently radiated through the air by the radiator body to which the LED is attached and the plurality of radiating fins via the flexible substrate.

JP 2008-21505 A

However, the following problems remain in the conventional technology.
That is, if an aluminum substrate or a ceramic substrate that is very expensive and has a high thermal conductivity is used for each of the plurality of LEDs for heat dissipation, there is a disadvantage that the number of parts and the member cost increase. Further, in the case of the light bulb-shaped lighting device described in Patent Document 1, the lighting device is mounted on a socket provided in a transparent or translucent umbrella-shaped member, and is used by hanging from a ceiling, In the case of a standlight provided on the pedestal, the light bulb-shaped lighting fixture uniformly illuminates the substantially hemispherical outer periphery, so the amount of illumination necessary to illuminate the umbrella-shaped member and the umbrella-shaped member are wide open There is a disadvantage that the amount of illumination light necessary for illuminating the lower part cannot be adjusted appropriately. In addition, since the lighting device is attached through the socket, there is a problem that heat dissipation is not sufficient and the life of the LED is shortened.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a lighting apparatus that can appropriately secure the necessary illumination light amount above and below the umbrella-shaped member and has high heat dissipation.

  The present invention employs the following configuration in order to solve the above problems. That is, the lighting fixture of the present invention includes a metal support having a lower surface and an upper surface, a single flexible print installed on both surfaces of the lower surface and the upper surface of the metal support and mounted with a plurality of LEDs. A substrate, a transparent or translucent umbrella-shaped member that covers the periphery of the metal support and opens downward, and a metal frame that is directly fixed to the metal support and supports the umbrella-shaped member. The LED is arranged on the lower surface side of the metal support and emits light downward, and the upper illumination is arranged on the upper surface of the metal support and emits light upward. It is characterized by being divided into groups.

  In this luminaire, a plurality of LEDs are arranged on the lower surface side of the metal support and emit light downward, and the LEDs are arranged on the upper surface side of the metal support and emit light upward. It is divided into an upper lighting group that mainly illuminates the umbrella-shaped member, and a lower lighting group that mainly illuminates the lower space (in the room for pendant lights and around the pedestal for stand lights). The number, type, and the like of the LEDs to be performed can be appropriately set in advance, and the illuminance required for each of the upper and lower sides can be set without waste. In addition, both the lower illumination group and the upper illumination group are mounted on a metal support and mounted on a single flexible printed circuit board, and a metal frame is directly connected to the metal support. Even if the LED is installed using a flexible printed circuit board, a high heat dissipation property is ensured by a sufficient heat dissipation path due to the highly efficient heat dissipation structure by the support and the metal frame. In addition, since multiple LEDs are mounted on a single flexible printed circuit board and installed on the upper and lower surfaces of the metal support, it is inexpensive and has a high degree of design freedom in terms of wiring connection and metal support shape. It can be flexibly adapted to lighting fixtures with different designs.

Moreover, the lighting fixture of this invention is equipped with the control part which is connected to the said flexible printed circuit board, and divides | segments the light emission of the said LED into the said lower illumination group and the said upper illumination group, and controls separately. .
That is, in this lighting fixture, since the control part which divides | segments light emission of LED into a lower illumination group and an upper illumination group separately and is controlled is provided, either one of a lower illumination group and an upper illumination group is required. Alternatively, both can selectively control the LED to emit light, and the illumination can be performed without waste.

Moreover, the lighting fixture of the present invention is characterized in that the upper illumination group has a smaller number of the LEDs than the lower illumination group.
That is, in this luminaire, the upper illumination group that mainly illuminates the umbrella-like member to obtain indirect light and requires less illumination light than the lower illumination group has a smaller number of LEDs than the lower illumination group. Therefore, the number of LED mounting is reduced, and the number of members and the member cost can be further reduced.

The present invention has the following effects.
That is, according to the lighting fixture according to the present invention, a plurality of LEDs are arranged on the lower surface side of the metal support and irradiates light downward, and on the upper surface side of the metal support. Since it is divided into an upper illumination group that emits light upward, the illuminance required for each of the upper and lower sides can be set without waste. In addition, since the metal frame is directly connected to the metal support, a high heat dissipation structure with the metal support and the metal frame ensures high heat dissipation even if the LED is installed using a flexible printed circuit board. The Therefore, in the lighting fixture of this invention, an expensive heat sink member and a high heat conductive metal substrate become unnecessary, and the lifetime improvement and cost reduction of LED can be achieved.

In one Embodiment of the lighting fixture which concerns on this invention, it is a perspective view which shows the lighting fixture which removed the umbrella-shaped member. In this embodiment, it is a front view which shows the lighting fixture installed in the ceiling. In this embodiment, it is a perspective view which shows the metal support body in which the flexible printed circuit board with which LED was mounted was installed. In this embodiment, it is the front view and top view which show a flexible printed circuit board. In this embodiment, it is the front view and top view which show a metal frame.

  Hereinafter, an embodiment of a lighting fixture according to the present invention will be described with reference to FIGS. 1 to 5. In each drawing used in the following description, the scale is appropriately changed to make each member a recognizable size.

  As shown in FIGS. 1 to 5, the lighting fixture 1 in the present embodiment is a pendant light that hangs from the ceiling T with a chain C or the like to illuminate the interior of the room, and has a metal support having a lower surface and an upper surface. 2, a flexible printed circuit board 4 that is installed over both the lower surface and the upper surface of the metal support 2 and on which a plurality of LEDs 3 are mounted, covers the periphery of the metal support 2, and opens downward. A transparent or translucent umbrella-shaped member 5 and a metal frame 6 that is directly fixed to the metal support 2 and supports the umbrella-shaped member 5.

The metal support 2 is a metal plate member having high thermal conductivity, and as shown in FIG. 3, a support through-hole 2a into which a columnar member 7 is inserted is formed at the center. For example, as the metal support 2, an aluminum plate having a thickness of 5 mm is employed. The metal support 2 and the columnar member 7 can be fixed by various fixing means such as bolting and pinning, but are fixed in contact with each other.
As shown in FIG. 4, the flexible printed circuit board 4 has a substrate through hole 4a formed at a position corresponding to the support through hole 2a and is bent from the lower surface of the metal support 2 to the upper surface through one side surface. The metal support 2 is fixed to the upper and lower surfaces by screws 8.

  In addition, when fixing the flexible printed circuit board 4 and the metal support 2 made of an aluminum plate, a thermal sheet such as heat radiation silicone is installed between the metal support 2 and the flexible printed circuit board 4 in order to lubricate the heat connection. Alternatively, it is preferable to apply a heat dissipating grease material and fix it with screws or the like. In this case, the adhesion between the metal support 2 and the flexible printed circuit board 4 is improved by the thermal sheet or the heat dissipating grease material, and a high heat dissipating effect can be obtained.

  A plurality of protrusions 2b are formed on the upper and lower surfaces of the metal support 2, and a plurality of positioning holes 4b into which the protrusions 2b can be fitted are formed in the flexible printed circuit board 4 at positions corresponding to the protrusions 2b. ing. That is, the flexible printed circuit board 4 is positioned on the metal support 2 by fitting each protrusion 2b into the corresponding positioning hole 4b.

  The plurality of LEDs 3 are arranged on the lower surface side of the metal support 2 and irradiate light downward, and the upper LED 3 is arranged on the upper surface side of the metal support 2 and emits light upward. It is divided into the lighting group 3B. The LED 3 of the lower illumination group 3A that mainly illuminates the interior of the room employs white LEDs of daylight white or fluorescent color, and the LED 3 of the upper illumination group 3B that mainly illuminates the umbrella-shaped member 5 A white LED of an incandescent light bulb color system may be used.

  The upper illumination group 3B has a smaller number of LEDs 3 than the lower illumination group 3A. In the present embodiment, ten white LEDs 3 are installed as the lower illumination group 3A, and two white LEDs 3 are installed as the upper illumination group 3B.

  Moreover, this lighting fixture 1 is connected to the flexible printed circuit board 4, and is provided with the control part 10 which divides | segments light emission of LED3 into the lower illumination group 3A and the upper illumination group 3B, and controls separately. The control unit 10 is configured by, for example, an IC or a switch circuit mounted on the flexible printed circuit board 4 and can be operated by a wired or wireless remote switch (not shown) provided outside the lighting fixture 1. Yes.

  The metal frame 6 includes a metal columnar member 7 inserted through the support through-hole 2a and having the metal support 2 fixed to an intermediate portion thereof, and a base end fixed to the upper portion of the columnar member 7 and radially outward. The three long plate-like members 11 that extend radially in the direction and the diameter of the cylindrical member 7 are set to be larger in a stepwise manner in accordance with the shape of the umbrella-like member 5 and the center of the cylindrical member 7. There are provided four annular members 12 arranged on the axis, and three rod-like support members 13 that connect the annular members 12 to each other and support them at intervals in the vertical direction.

The tips of the three long plate-like members 11 are fixed to the annular member 12 arranged second from the top.
As shown in FIG. 2, the umbrella-shaped member 5 has a truncated conical shape with an upper portion and a lower portion opened, and is formed of a transparent or translucent resin plate or the like. The umbrella-like member 5 is supported on the outer peripheral side of the metal frame 6 with the metal frame 6 covered from above.
In addition, the shape of the metal frame 6 is appropriately set corresponding to the shape of the umbrella-shaped member 5 to be supported. Further, the metal support 2 and the flexible printed circuit board 4 may be housed and installed in a transparent or translucent light source case. Even in this case, the metal frame 6 is directly connected to the metal support 2.

  When attaching this lighting fixture 1 to the ceiling T, it can be suspended by fixing one end of the chain C to the upper end of the cylindrical member 7 and attaching the other end to the ceiling T. Also, electric wiring (not shown) for power wiring and wired remote control is suspended from the ceiling T together with the chain C and connected to the flexible printed circuit board 4. The flexible printed circuit board 4 is provided with a connection connector (not shown) to which electrical wiring can be connected.

  As described above, in the lighting fixture 1 of this embodiment, the plurality of LEDs 3 are arranged on the lower surface side of the metal support 2 and irradiate light downward, and on the upper surface side of the metal support 2. Since it is divided into the upper illumination group 3B that is arranged and emits light upward, the upper illumination group 3B that mainly illuminates the umbrella-shaped member 5 and the lower illumination that mainly illuminates the lower space (inside the room) The number, type, and the like of the LEDs 3 installed in the group 3A can be appropriately set in advance, and the illuminance required for each of the upper and lower sides can be set without waste.

  In addition, both the lower illumination group 3A and the upper illumination group 3B are mounted on the metal support 2 and mounted on the single flexible printed circuit board 4, and the metal frame 6 is directly connected to the metal support 2. Therefore, even if LED3 is installed using the flexible printed circuit board 4, high heat dissipation is ensured by sufficient heat dissipation path | route by the highly efficient heat radiator structure by the metal support body 2 and the metal frame 6. FIG. In addition, since a plurality of LEDs 3 are mounted on the flexible printed circuit board 4 and installed on the upper and lower surfaces of the metal support 2, it is inexpensive and has a high degree of design freedom in terms of wiring connection and the shape of the metal support 2, etc. It can be flexibly adapted to lighting fixtures with different designs.

  Furthermore, since the control part 10 which divides | segments light emission of LED3 into the lower illumination group 3A and the upper illumination group 3B, and is controlled separately is provided, either one of the lower illumination group 3A or the upper illumination group 3B is required Alternatively, both can selectively control the LED 3 to emit light, and the illumination can be performed without waste. That is, according to a use and a situation, lighting of the upper part and the lower part can be appropriately selected by the control unit.

  For example, in this embodiment of the pendant light, when it is desired to illuminate the entire room, the control unit 10 turns on the LEDs 3 in both the lower illumination group 3A and the upper illumination group 3B, illuminates the whole with a high amount of light, and sleeps. The control unit 10 turns on only the LEDs 3 of the upper illumination group 3B with a low amount of light, mainly illuminates the umbrella-like member 5 and uses indirect light through the umbrella-like member 5 in a dim state in the room. Can be illuminated.

  In addition, the upper illumination group 3B that mainly illuminates the umbrella-shaped member 5 to obtain indirect light and requires less illumination light than the lower illumination group 3A has a smaller number of LEDs 3 than the lower illumination group 3A. Further, the number of mounted LEDs can be reduced, and the number of members and the member cost can be further reduced.

  In addition, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.

  For example, in the above-described embodiment, the present invention is applied to a pendant light that is suspended from the ceiling. However, the present invention may be applied to a stand light in which an umbrella-shaped member or the like is attached to a column that is erected on a pedestal. Absent. In this case, when it is desired to mainly illuminate the lower part of the umbrella-like member and the periphery of the pedestal, the LED of the lower illumination group is turned on by the control unit to illuminate the lower part with a high amount of light. Only the LED can be turned on with a low light quantity, and the umbrella-shaped member can be mainly illuminated to illuminate in a dim state using indirect light through the umbrella-shaped member.

  DESCRIPTION OF SYMBOLS 1 ... Lighting fixture, 2 ... Metal support body, 3 ... LED, 3A ... Lower illumination group, 3B ... Upper illumination group, 4 ... Flexible printed circuit board, 5 ... Umbrella-shaped member, 6 ... Metal frame, 10 ... Control part

Claims (3)

A metal support having a lower surface and an upper surface;
A flexible printed circuit board that is installed over both the lower and upper surfaces of the metal support and on which a plurality of LEDs are mounted;
A transparent or translucent umbrella-shaped member covering the periphery of the metal support and opened downward;
A metal frame fixed directly to the metal support and supporting the umbrella-shaped member,
The plurality of LEDs are arranged on the lower surface side of the metal support and irradiate light downward, and the upper illumination group is arranged on the upper surface side of the metal support and emits light upward A lighting device characterized by being divided into a lighting group. The lighting fixture according to claim 1,
A lighting apparatus comprising: a controller connected to the flexible printed circuit board and separately controlling light emission of the LEDs in the lower illumination group and the upper illumination group. The lighting fixture according to claim 1 or 2,
The upper lighting group has a smaller number of the LEDs than the lower lighting group.

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