JP2014086249A - Led lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor lamp which prevents heat generated by LED elements from being transmitted to electronic components forming a lighting circuit to thereby prevent deterioration of the electronic components and efficiently radiates heat generated by the LED elements to outside the lighting device.SOLUTION: In an LED lighting device 100, an LED lamp body 10 housing an LED substrate 2 on which LED elements 1 are mounted and a lighting circuit board 5 is attached to target object by heat conductive attachment means 20. In the LED lighting device 100, one end side of the attachment means 20 is inserted into the LED lamp body 10. The LED substrate 2 is joined to the one end side of the attachment means 20 so as to conduct heat, and the lighting circuit board 5 is disposed spaced apart from the attachment means 20.

Description

  The present invention relates to an LED lighting device attached to an outdoor column or the like, and more particularly to an LED lighting device having excellent heat dissipation.

In recent years, with increasing environmental awareness, LED lighting devices using LED elements with excellent power savings as light sources have been actively used, such as road lights, parking lot lights, It is also used for security lights. On the other hand, such outdoor lamps use high-luminance LED elements, so that when the LED elements are turned on, the LED elements become hot, causing problems such as reduced brightness and shorter usable time. Lighting fixtures with improved heat dissipation have been developed.

In the road lighting apparatus described in Patent Document 1, a metal mounting plate, an LED unit disposed on one end side of the mounting plate, and a power supply unit disposed on the other end side of the mounting plate And a metal arm attached so as to face the inside from the outside of the main body, and the attachment plate is fixed to the arm.
Further, the LED illumination lamp described in Patent Document 2 includes an LED light source body having a plurality of LED elements and a heat radiating body to which the LED light source body is attached, and the total length of the heat radiating body is a fluorescent lamp. It is set in accordance with the standard, and has a terminal-like engagement portion that can be engaged with and disengaged from a socket portion of an existing fluorescent lamp fixture at both longitudinal ends of the radiator.

JP 2011-249110 A JP 2012-9316

However, in the road light described in Patent Document 1, since the LED unit is attached to one side of the metal mounting plate and the power unit is attached to the back side, heat is conducted from the LED unit to the power unit, There is a risk of deteriorating electronic components in the power supply unit.
Also in the LED illuminating lamp described in Patent Document 2, the lighting circuit is attached to the back side of the heat radiating body to which the LED light source body is attached as shown in paragraph 0024 of FIG. 1 and FIG. 1 to FIG. Therefore, the heat from the LED element is likely to be transferred to the lighting circuit, which may cause deterioration of the electronic component.

The present invention has been made as a result of intensive studies to solve the above-described problems. The heat generated in the LED elements is not transferred to the electronic components constituting the lighting circuit, and the electronic components are deteriorated. The present invention provides a long-life LED illuminating device that prevents the brightness from decreasing and efficiently dissipates heat generated in the LED element to the outside of the illuminating device.

In the invention according to claim 1, in the LED lighting device in which the LED lamp body in which the LED board on which the LED element is mounted and the lighting circuit board are accommodated is attached to the attached body by means of thermally conductive attachment. One end side of the attachment means is inserted inside the LED lamp body,
The LED board is joined to one end side of the attaching means so as to be capable of conducting heat, and the lighting circuit board is arranged apart from the attaching means.

  In the invention according to claim 2, the outer shell of the LED lamp body is formed of a resin material, the lighting circuit board is accommodated in a resin power box, and the power box is connected to the LED lamp body. And a space portion is formed between the power supply box and the attachment means.

According to a third aspect of the present invention, a space is formed between the lighting circuit board and an inner wall surface of the power supply box.

According to a fourth aspect of the present invention, the power supply box has a through hole for ventilation.

According to the first aspect of the present invention, the heat generated in the LED element is conducted to the thermally conductive mounting means, radiated to the outside of the LED lamp body, and between the lighting circuit board and the mounting means. Since there is a space for heat insulation and thermal deterioration of the electronic components is prevented, the LED illumination device with a long life can be provided without reducing the brightness.

  According to the invention described in claim 2, a resin power box is attached to the resin outer shell of the LED lamp body, and a heat insulating space is provided between the power box and the attachment means. As a result, the heat generated by the LEDs is more difficult to conduct to the lighting circuit board, and thermal degradation of the electronic components is suppressed.

  According to invention of Claim 3, the heat which generate | occur | produced in the lighting circuit board is radiated by the surrounding space by a convection and a circulation, and the temperature rise of an electrical component is suppressed.

  According to the invention of claim 4, the air heated by the heat generated in the electronic component rises and passes through the through-hole formed in the upper surface of the power supply box, and the mounting means and the outer shell of the LED lamp body , The cooled air descends, passes through a through-hole formed in the lower surface of the power supply box, flows into the power supply box, and cools the electronic component, further suppressing the temperature rise of the electronic component. The

External view of LED lighting device and attached means according to this embodiment External perspective view of LED lighting device according to the present embodiment Rear view of the LED lamp body according to this embodiment XX sectional drawing of the LED lighting apparatus concerning this embodiment XX expanded sectional perspective view of the vicinity of the support means according to the present embodiment YY line and ZZ line enlarged sectional perspective view near the power supply box according to the present embodiment The exploded perspective view of the LED lighting device concerning this embodiment

  Preferred embodiments of the present invention will be described below with reference to the drawings. This embodiment is an example, and the present invention is not limited to this. FIG. 1 is an external view in which the LED lighting device 100 according to the present embodiment is attached to a column 200 that is an attached means. FIG. 2 is an external perspective view of the LED lighting device 100 according to the present embodiment. FIG. 3 is a rear view of the LED lamp body 10 according to the present embodiment. FIG. 4 is a sectional view taken along line XX of the LED lighting device 100 according to the present embodiment. FIG. 5 is an enlarged cross-sectional perspective view along the line XX in the vicinity of the support means according to this embodiment. FIG. 6 is an enlarged cross-sectional perspective view of the YY line and ZZ line near the power supply box according to the present embodiment. FIG. 7 is an exploded perspective view of the LED lighting device 100 according to the present embodiment.

  The LED lighting device 100 according to the present embodiment is a security light that is used by being attached to a support column 200 provided outdoors as an attached means. The LED lamp body 10 and the LED lamp body 10 are connected to the support column 200. And an arm 20 as attachment means for attachment. In addition, a to-be-attached body may be not only a support | pillar but a wall surface, a frame, etc.

The outer periphery of the LED lamp main body 10 includes a housing 11 having a lower surface opening and a translucent cover 12 that covers the lower surface opening.
Inside the LED lamp main body 10 is a power supply box containing an LED substrate 2 on which a plurality of LED elements 1 are mounted, a support plate 3 on which the LED substrate 2 is mounted, and a lighting circuit substrate 5 on which electronic components 4 are mounted. 6 is generally accommodated.

  The arm 20 is made of a steel plate, and the cross section of the arm 20 is formed in a U shape including an arm lower surface 21 and two arm side surfaces 22 and 23, and is bent so as to be bent in a U shape on the mounting means. Has been. As shown in FIG. 1, the LED lamp body 10 is inserted and fixed at one end side of the arm 20 so that the opening of the arm 20 faces upward, and a simple mounting bracket 210 is used at the other end side. Attached to the column 200.

The casing 11 is formed into a long and narrow ship shape using polybutylene terephthalate resin. The housing 11 is formed with an opening surface surrounded by a substantially rectangular parallelepiped frame on the side facing the road surface that is the irradiated surface when attached to the support column 200. Further, as shown in FIG. 3, the outer shell on the back side of the casing 11 facing the support column 200 has a U-shaped through slit 13 (FIG. 3) with a U-shape facing upward corresponding to the cross-sectional shape of the arm 20. The shaded portion of FIG.
The arm 20 is fixed to the LED lamp body 10 by inserting the tip of the arm 20 into the through slit 13. In the present embodiment, the arm 20 is inserted up to about half of the longitudinal direction of the housing 11, but may be inserted over the entire length.

The translucent cover 12 is formed into a ship shape using a polycarbonate resin, and is attached to the housing 11 so as to cover the LED substrate 2.

As the LED element 1, various known LEDs can be used. In this embodiment, a high-luminance type LED element that emits white light for illumination is used. A chip-on-board type LED module may be used.

The LED substrate 2 is a long flat plate and a known printed circuit board such as a glass epoxy substrate, a metal substrate, or a ceramic substrate is used. In the present embodiment, a printed circuit board made of a metal substrate coated with an electrically insulating resin is used, and the LED element 1 is mounted on one side. Further, a plurality of lenses 7 are arranged on the LED substrate 2 so as to obtain a desired light distribution so as to cover each LED element 1 and are fixed by a lens fixing member 8.

The support plate 3 is a long aluminum flat plate, and as shown in FIG. 7, extends from the LED substrate placement surface 31 and the three sides of the LED substrate placement surface to the translucent cover side. It is formed as a box having a lower opening made up of three surfaces 32. The LED substrate 2 is bonded to the LED substrate mounting surface 31, and one end on the short side of the support plate 3 is bonded to the tip of the arm lower surface 21 as shown in FIG. Has been.
Since the housing 11 is made of resin and has low thermal conductivity, the heat generated in the LED element 1 is conducted mainly to the high thermal conductivity arm 20 through the high thermal conductivity support plate 3 and the LED lamp. Heat is radiated outside the main body 10. In addition, the heat radiation area of the support plate 3 is increased by the three surfaces 32 extending toward the translucent cover 12, and the heat radiation performance of the LED element 1 is increased.

The lighting circuit board 5 is a flat printed board, and is housed in the power supply box 6 so as to be parallel to the LED board 2.
The power supply box 6 is a substantially rectangular polybutylene terephthalate box, and includes a power supply box body 61 on which the lighting circuit board 5 is placed and a power supply box lid 62. As shown in FIG. 5, the power supply box 6 is disposed between the arm lower surface 21 and the translucent cover 12 on the side close to the support column 200. That is, the power supply box 6 is arranged in a portion of about 1/3 in the longitudinal direction of the casing 11 on the side close to the support column 200, and the support plate 3 is arranged in the remaining about 2/3. The power supply box body 61 is fixed to a hole provided in the power supply box fixing boss 14 erected from the upper inner wall of the housing 11 with a screw (not shown).

As shown in FIG. 6, there is a difference between the arm 20 and the power supply box 6 between the arm 20 and the power supply box 6 depending on the axial length of the power supply box fixing boss 14 and the thickness of the arm front end clamping portion 15 into which the front end side of the arm 20 is inserted. 1 space part A is formed, and the power supply box 6 does not contact the arm 20 directly.
The position of the power supply box 6 may be located between the arm lower surface 21 and the inner wall of the upper surface of the housing 11, and the lighting circuit board 5 and the power supply box 6 may be disposed in reverse. . Also in this case, the power supply box 6 is fixed so as not to contact the arm 20.

Further, lighting circuit board support protrusions 63 are formed at four corners from the inner wall of the upper surface of the power supply box body 61 (parts are shown in FIGS. 6 and 7), and the lighting circuit board 4 and the power supply box body 61 are provided. A second space B is formed between the two.
The first space portion A, the second space portion B, the resin power supply box 6, and the power supply box 6 fixed to the resin housing 11 cause the LED element 1. The heat is not conducted to the electronic component 4 mounted on the lighting circuit board 5, and the temperature rise of the electronic component 4 is suppressed. Moreover, since the electronic component 4 is radiated to the space A, the space B, and the space inside the power supply box 6, the temperature rise is suppressed.

Further, the power supply box 6 is disposed below the arm 20, and a through hole (not shown) is formed in the upper outer wall of the power supply box main body 61 and the lower outer wall of the power supply box lid 62, so that the electronic component 4 is provided. The air warmed by the heat generated in the air rises, reaches the arm 20 through the through hole of the power supply box body 61 and dissipates heat, and the cooled air descends and passes through the through hole of the power supply box lid 62. Then, the electronic component 4 flows into the power supply box 6 and is cooled, so that the temperature rise of the electronic component 4 is further suppressed.

  Thus, the heat generated in the LED element 1 is dissipated outside the LED lamp body 10 without being transmitted to the electronic component 4 by the heat transfer path of the present invention. The heat generated in the electronic component 4 is radiated by convection. Thereby, it is possible to provide the LED lighting device 100 having a long life without reducing the brightness.

1: LED element 2: LED substrate 3: support plate, 31: LED substrate mounting surface, 32: extended three surfaces 4: electronic component 5: lighting circuit substrate
6: power box 61: power box body 62: power box lid 63: lighting circuit board support protrusion 7: lens 8: lens fixing member 10: LED lamp body 11: housing 12: translucent cover 13: penetration Slit 14: Power supply box fixing boss 15: Arm tip clamping part 20: Arm (mounting means)
21: Arm lower surface 22, 23: Arm side surface 100: LED lighting device 200: Support column (attachment means)
210: Simple mounting bracket A: First space B: Second space

Claims (4)

In the LED lighting device for mounting the LED lamp body that houses the LED board on which the LED element is mounted and the lighting circuit board to the body to be mounted by the thermally conductive mounting means,
One end side of the attachment means is inserted into the LED lamp body,
The LED substrate is joined to one end side of the attachment means so as to be capable of conducting heat,
The LED lighting device, wherein the lighting circuit board is disposed apart from the attachment means. The outer shell of the LED lamp body is formed of a resin material,
The lighting circuit board is housed in a resin power box,
2. The LED according to claim 1, wherein the power supply box is attached to an outer periphery of the LED lamp main body, and a space is formed between the power supply box and the attachment means. Lighting device.   The LED lighting device according to claim 2, wherein a space is formed between the lighting circuit board and an inner wall surface of the power supply box. The LED lighting device according to claim 2 or 3, wherein a through hole for ventilation is formed in the power supply box.