JP5016587B2 - LED lamp - Google Patents

Description

The present invention office, residential, shop, school, freezer, on the L ED lamps that are used to, such as billboards.

Recently, there are many examples in which LED lamps (light emitting diode lighting) incorporating LEDs (light emitting diodes) such as bullet type or surface mount type are used instead of the lighting lamps of incandescent bulbs. This is because this LED lamp has a longer life and consumes less power than an incandescent lamp.
LED lamps are used in a state where a plurality of LEDs are linearly arranged in a single row or a plurality of rows because the amount of light emitted by the LED alone is small (Japanese Patent Laid-Open Nos. 2001-351402 and 2004-335426). Gazette).
However, in the fluorescent lamp-converting light-emitting diode lamp described in, for example, Japanese Patent Application Laid-Open No. 2004-335426, the temperature inside the rod-shaped synthetic resin outer tube rises due to heat generated from a plurality of white light-emitting diodes, and the temperature rise is white light-emitting diodes There is a problem that causes deterioration.
In order to solve the problem of shortening the life of the LED lamp due to such a temperature rise, an LED lamp having a heat sink has been proposed (Japanese Patent Laid-Open No. 2008-77948 and Utility Model Registration No. 3145174).
An illumination lamp device described in Japanese Patent Application Laid-Open No. 2008-77948 (hereinafter referred to as “conventional example 1”) has a heat radiating plate for removing heat generated from the light emitting diode 3 as a light emitter as shown in FIG. A reflector 6 is also provided. The reflecting plate 6 is formed in a substantially W shape, and a substrate 5 on which the light emitting diode 3 is arranged is attached to two central mountain-shaped inclined surfaces 61 by fixing means K such as screws.
A synthetic resin fluorescent lamp lamp shade (hereinafter referred to as “conventional example 2”) described in Japanese Utility Model Registration No. 3145174 is formed in a cut groove provided in a pipe-shaped lamp shade 1 as shown in FIG. Is fitted with an aluminum heat dissipating plate 2 to which a base 3 on which an LED lamp 4 is set is attached, and heat from the LED lamp 4 is released by the heat dissipating plate.
JP 2001-351402 A JP 2004-335426 A JP 2008-77948 A Utility Model Registration No. 3145174

Although both Conventional Example 1 and Conventional Example 2 have the advantage of being able to fulfill the function of removing (dissipating) the heat generated from the LEDs, in Conventional Example 1, the substrate 5 on which the reflector 6 and the light emitting diode 3 are arranged, The conventional example 2 has the same problems as the conventional example 1 in relation to the heat sink 2 and the substrate 3 on which the LED lamp 4 is set.
The purpose of the invention is to provide a L ED lamp assembly that facilitates the Do.

A first feature of the LED lamp according to the present invention is a heat dissipation support for an LED lamp having a support groove, and an LED which is inserted and supported in the support groove of the heat dissipation support and is a light source in its length direction. And a cylindrical tube body each having a holding means and a storage chamber provided on the inner back side. A wiring groove that is cut from the outer peripheral surface on the back side toward the support groove side is formed in the main body of the heat dissipation support, and the support groove is formed on the support side that is opposite to the back side. , the opening of the supporting groove is provided towards the irradiation direction of the LED, together with the outer peripheral surface is formed in a convex arc surface, it can be in close contact with the inner peripheral surface of the tube. The LED can be irradiated from the storage chamber toward an irradiation side opposite to the back side of the tubular body. The holding means includes a plate-like holding portion protruding so as to face each other inward from an inner peripheral surface at a position on the back surface side of the tubular body. The two plate-like holding portions are formed over the entire length along the length direction of the tubular body, and a gap is formed between the tip portions of the two holding portions. The storage chamber is formed by a space surrounded by the inner peripheral surface on the back side in the tubular body and the holding portion. The heat dissipating support body inserted and arranged in the storage chamber of the tube body is held in a state of being sandwiched between the both holding portions and the inner peripheral surface of the tube body of the storage chamber.
The outer peripheral surface of the back side of the body, for location stably held in the tube body of a cylindrical LED lamp of the radiator support, as described above, to form a convex arc surface, of the tubular body It is possible to adhere to the peripheral surface .
The second feature of the LED lamp according to the present invention is based on the first feature, and is a holding portion in which the tip portions of both the holding portions are bent toward the back side of the tubular body, and heat dissipation in the storage chamber. The support body is held in a state of being sandwiched between the pressing portions of the both holding portions and the inner peripheral surface of the tubular body.
A third feature of the LED lamp according to the present invention is based on the first or second feature described above, and the outer peripheral surface on the back side of the heat radiating support is covered with a heat radiating film. It is in close contact with the inner peripheral surface through the heat dissipating film, and the back surface, which is the surface opposite to the LED mounting surface, is covered with the heat dissipating film and is in close contact with the inner surface of the support groove of the heat dissipating support. A strip-shaped heat-dissipating film is formed on the outer peripheral surface of the back portion of the tube body in the longitudinal direction so as to face the outer peripheral surface on the back side of the heat-dissipating support body, and is positioned outside. The heat-dissipating film of the tube body, the heat-dissipating film of the heat-dissipating support located in the middle, and the heat-dissipating film of the substrate located inside are three layers of heat-dissipating properties arranged at intervals It is in the film.

According to the LED lamp of the present invention , the heat radiation support is inserted and disposed in the housing chamber of the tube body, and the substrate to which the LED is attached can be inserted and supported through the support groove of the heat radiation support. According to the configuration, heat from the substrate can be removed through the heat radiating support, and the housing chamber is provided on the back side of the tubular body, so that the shadow of the LED hardly appears in a dot shape on the surface of the tubular body.

An LED lamp using a heat dissipation support for an LED lamp according to the present invention will be described with reference to the drawings.
First, a heat dissipation support for an LED lamp will be described with reference to FIGS.
The heat dissipation support 1 shown in FIGS. 1 to 6 has a main body 1a made of a rod-shaped body using an aluminum material that is a heat dissipation member, and functions as a heat sink.
The heat radiation support 1 (main body 1a) is provided with a support groove 11 on the opposite side (lower side) to the back side (upper side in FIG. 1) in the length direction over the entire length. The opening 16 of the support groove 11 is directed to the lower irradiation side (the light irradiation direction side of the LED 3 described later), and receiving portions 15 are provided at both side edges of the opening.
On the outer peripheral surface 1a1 on the back side (upper side in FIG. 1) of the heat radiation support body 1 (main body 1a), a single or a plurality of wiring grooves (in the example shown in FIG. 1, a plurality of wiring grooves 12 in the length direction). , 13, 14). The outer shape of the upper outer peripheral surface 1a1 of the heat dissipation support 1 forms a convex arc surface. The outer peripheral surface 1a1 of the heat radiating support 1 can be in close contact with the inner peripheral surface of a cylindrical tube 6 of the LED lamp 5 described later (FIG. 13).
Further, as shown in FIG. 6, the outer peripheral surface 1a1 of the heat dissipation support 1 is coated with a heat dissipating film 17, for example, a ceramic coat film, and the entire outer peripheral surface is covered with the heat dissipating film.
The heat radiating support 1 is processed by an extrusion method using an extruder.

As shown in FIGS. 7 to 9, the heat dissipation support 1 can insert and support a substrate 2 with an LED on which an LED (light emitting diode) 3 is mounted in a support groove 11.
The board | substrate 2 with LED consists of an elongate board body, and is inserted in the support groove | channel 11 of the thermal radiation support body 1 at the time of an assembly. The substrate 2 is provided with a control unit (not shown) that is electrically connected to the LEDs 3. Single or multiple rows of LEDs 3 are linearly spaced on one side surface (lower surface in FIG. 7) of the substrate 2, and a bridge rectifier (bridge diode) 4 is attached to one end. In the example shown in FIGS. 7 to 9, a plurality of white light emitting LEDs 3 are arranged on the substrate 2 in a straight line at equal intervals along the length direction, and a surface (one side surface of the substrate) ( The lower surface of FIG. 7) White printing or a white sheet (not shown) is applied to the entire surface to increase the efficiency of extracting internal reflected light. Further, a heat dissipating film 21 (FIG. 7) made of, for example, a ceramic coat film is applied to the entire back surface (upper surface of FIG. 7) opposite to the LED 3 mounting surface of the substrate 2.
When the board | substrate 2 with LED is accommodated in the support groove | channel 11 of the thermal radiation support body 1, as shown in FIG. 7, it supports with the body both sides mounted on the receiving part 15, and each LED3 is the lower part. Is exposed below the opening 16, it is possible to irradiate light downward.
In order to support the substrate 2 with the LED on the heat dissipation support 1, the substrate is inserted into the support groove from one side (left or right side of FIG. 9) of the support groove 11 and then the other side. Slide towards.

Next, an LED lamp (light emitting diode lamp) 5 incorporating the heat dissipation support 1 will be described with reference to FIGS.
The LED lamp 5 includes a tube body 6 made of an elongated cylindrical pipe, and a heat radiation support body 1 disposed inside a storage chamber 63 provided on the bottom side (upper side in FIG. 11) which is the back side of the tube body. A substrate 2 that is detachably supported in the support groove 11 of the heat dissipation support, an LED 3 that is a light source mounted on the substrate, and a base 7 that is attached to both ends of the tube. It has. The LED 3 of the LED lamp 5 can irradiate light toward the side opposite to the back side of the tube body 6 (the lower side in FIG. 11).

The tubular body 6 is made of a plastic pipe, and in this example, a milky white one containing a fluorescent paint, a diffusing material, and a discoloration preventing material is used.
As shown in FIGS. 15 to 17, the pipe body 6 is provided with holding means (in the example shown in FIG. 15, flat holding parts 61 and 62) at a position approaching the inner peripheral surface on the back side (upper side of FIG. 14). ) Is provided. The holding portions 61 and 62 are provided over the entire length along the length direction of the tube body 6. The holding portions 61 and 62 are located on both the left and right sides in FIG. 15 and protrude from the inner peripheral surface of the tubular body 6 so as to face inward and face each other. The holding portions 61 and 62 are presser portions 61 a and 62 a whose front end portions are bent upward, and the front end portions are in a facing positional relationship with a gap 64 therebetween. In the example shown in FIG. 17, the gap 64 has a slit shape formed over the entire length of the tube body 6. A space surrounded by the inner peripheral surface on the back side in the tubular body 6 and the holding portions 61 and 62 is a storage chamber 63.
The tubular body 6 is formed with a belt-like heat-dissipating film 65 having a predetermined width W on the outer peripheral surface on the bottom side (upper side in FIG. 13) which is the back side. As shown in FIGS. 12 and 13, the heat dissipation film 65 is provided over the entire length from one end of the tube body to the other end along the length direction of the tube body 6. The heat dissipating film 65 is, for example, a ceramic coat film, and plays the role of lowering the heat in the pipe body by absorbing the heat in the pipe body 6 and letting it out of the pipe body.
The tube body 6 is processed by an extrusion method using, for example, a pipe extruder, and the tube body and the holding portions 61 and 62 are integrally formed.

As shown in FIGS. 10 and 11, the heat dissipation support 1 in which the substrate 2 with LED is fitted in the support groove 11 is arranged inside the storage chamber 63 of the tube body 6, and includes a holding portion 61, The holding parts 61a, 62a of 62 and the inner peripheral surface of the tubular body of the storage chamber are held in a sandwiched state. In this holding state, the outer peripheral surface 1a1 on the upper side of the heat dissipation support 1 is brought into close contact with the inner peripheral surface of the tube body 6 via the heat dissipation film 17, so that the stable position holding of the heat dissipation support is maintained.
Moreover, the outer peripheral surface 1a1 of the heat radiating support body 1 constitutes a close contact surface with the inner peripheral surface of the tube body 6, and the heat dissipating film 65 of the tube body 6 is in an opposing positional relationship with this close contact surface. The above-mentioned width corresponds to the width W of the heat radiation film 65 with the tubular body 6 interposed therebetween as shown in FIGS. For this reason, since the heat dissipating film 17 of the heat dissipating support 1 and the heat dissipating film 65 of the tube body 6 are overlapped with each other with the tube interposed therebetween, the heat dissipating from the heat dissipating support 1 is from the heat dissipating film 17 It is possible to smoothly escape to the heat dissipation film 65 through the tube body 6.

  The wiring grooves 12, 13, and 14 of the heat dissipation support 1 are used depending on the type of LED used and the configuration of the substrate 2, but no wiring is required in this example. Further, a wide base 7 is used at both ends of the tube body 6. Each base 7 is provided with a terminal pin 8, and each terminal pin is electrically connected to the substrate 2.

In the LED lamp 5 having the above configuration, the emitted light from the LED 3 spreads conically (radially) around the optical axis, and irradiates the irradiation surface opposite to the back side of the tube body 6. At this time, since the substrate 2 to which the LED 3 is attached is supported by the heat dissipation support 1 in the storage chamber 63 on the back side of the tube body 6, the emission angle of the LED 3 is widened. The effect is exerted, and the shadow of the LED 3 on the surface of one side of the tube is less likely to appear in the form of dots, and this effect is further exhibited by the fact that the color of the tube 6 is milky white.
Heat generated from the LED 3 is absorbed from the substrate 2 to the heat radiating support 1, and the absorbed heat is released from the heat radiating support through the tube 6 to the outside, and high temperature inside the LED lamp 5 is suppressed. The heat dissipation films 17, 21 and 65 of the heat dissipation support 1, the substrate 2 and the tube body 6 make the suppression of high heat even more effective.

The tube 6 is made of, for example, polycarbonate as a plastic material. When the tube body 6 is processed by an extrusion molding method, in the illustrated example, the distribution ratios of milky white polycarbonate pellets, fluorescent paint pellets, diffusing material pellets, and discoloration preventing materials are set to predetermined values in advance. . By appropriately changing the blending ratio of these materials, the diffusion of light irradiated from the LED lamp 5, the degree of transparency, and the amount of irradiation from the light source can be adjusted.
The length, inner diameter and thickness of the tube body 6, the length and width of the substrate 2 with LED, the protruding length of the holding portion, and the width of the base 7 are all appropriate.

In the heat dissipation support 1 for the LED lamp shown in the figure, the substrate 2 on which the LED 3 is mounted can be removably supported in the support groove 11, so that assembly and disassembly is easy, and heat from the substrate is reliably ensured. In addition, the heat dissipation film 17 further ensures heat dissipation. Since the wiring grooves 12, 13, and 14 can be provided on the outer peripheral surface of the heat dissipation support 1 to secure a space for wiring, the space of the storage chamber 63 can be saved by the space, and the heat dissipation support. The effect as a heat sink can be enhanced by expanding the heat radiation area. By allowing the outer peripheral surface of the heat dissipation support 1 to be in close contact with the inner peripheral surface of the tube body 6 as an arc surface, stabilization of the position holding of the heat dissipation support body and heat can be smoothly and reliably released to the tube body side, Since the heat dissipation film 65 is close to and faces the heat dissipation film 17 of the heat dissipation support 1, the heat dissipation effect is further enhanced.
According to the LED lamp 5 shown in the figure, the heat radiation support 1 that supports the substrate 2 to which the LED 3 is attached is disposed in the storage chamber 63 provided on the back side (bottom side) in the tube 6. LED light spreading radially around the optical axis increases the distance to the irradiation surface, so the radiation area is widened, and the shadow of each LED 3 is less likely to appear in the form of dots on the surface of the tube. In other words, the application range of the LED lamp can be expanded. The tube 6 is composed of milky white plastic pipe by mixing and distributing polycarbonate, fluorescent paint, diffusing material, and anti-discoloring material, so that the diffusion of light, transparency and the amount of irradiation from the LED 3 as the light source can be adjusted. It can be adjusted, and combined with the fact that the substrate 2 is arranged close to the inner peripheral surface on the back side of the tube body 6, the shadow of each LED 3 is less likely to appear in the form of dots on the surface of the tube body. The effect is better exhibited, and the LED lamp 5 can be used as a multi-directional illumination means. When the LED lamp 5 is assembled, the heat dissipating support 1 that supports the substrate 2 with the LED in the storage chamber 63 can be held in the tube 6 simply by sliding the assembly. The work is easy and the disassembly is easy because it can be detached. Since the heat dissipating film 21 of the substrate 2, the heat dissipating film 17 of the heat dissipating support 1, and the heat dissipating film 65 of the tube 6 are arranged in three layers as shown in FIG. Since heat is smoothly and reliably radiated from the substrate 2 to the heat radiating support 1 and from the heat radiating support to the tube 6, efficient and effective heat radiation is possible.

In a state where the substrate 2 with LED is inserted into the support groove 11 of the heat dissipation support 1, it is preferable that the back surface of the substrate is in close contact with the inner surface of the support groove 11 as shown in FIG. Of course, depending on the configuration of the back surface of the substrate, the back surface does not necessarily need to be in close contact with the inner surface of the support groove 11. Moreover, the wiring grooves 12, 13, and 14 are provided in the heat dissipation support 1 as necessary. When wiring grooves are provided, the number and cross-sectional shape thereof are not limited to the illustrated example.
In the example described above, the white light LED 3 is arranged in the milky white plastic pipe that is the tube body 6, but the color in the tube body is similar to the emission color of the LED (including the same color). It is desirable from the viewpoint of limiting the appearance of LED shadows on the surface of the tube as much as possible. From the same point of view, the tube body 6 is translucent and may be a non-transparent (opaque or translucent) member, but may be transparent. Of course, the material of the tube 6 and the emission color of the LED 3 are not limited to the above example.
Each of the holding portions 61 and 62 of the tubular body 6 is provided over the entire length of the tubular body, but may be provided at an appropriate interval. By providing the holding portions 61 a and 62 a bent upward at the tip portions of the holding portions 61 and 62, it is useful for stably holding the heat dissipation support 1. However, the holding portions 61 and 62 may be in a horizontal state without bending the tip portions.
According to the illustrated example, the LED 3 has the same shape and size. However, the LED 3 is not limited to this, and the LED 3 uses a surface-mount type, but cannonball type, etc. An appropriate type is used according to the application.

It is a perspective view which shows the thermal radiation support body used for the LED lamp which concerns on this invention. It is a top view which shows the thermal radiation support body used for the LED lamp which concerns on this invention. It is a front view which shows the thermal radiation support body used for the LED lamp which concerns on this invention. It is a bottom view which shows the thermal radiation support body used for the LED lamp which concerns on this invention. It is the VV sectional view taken on the line of FIG. It is the VI-VI line expanded sectional view of FIG. It is an enlarged side view which shows the thermal radiation support body which is supporting the board | substrate with LED used for the LED lamp which concerns on this invention. It is a bottom view which shows the thermal radiation support body which is supporting the board | substrate with LED used for the LED lamp which concerns on this invention. It is a partially notched front view which shows the thermal radiation support body which is supporting the board | substrate with LED used for the LED lamp which concerns on this invention. It is a partially cutaway front view which shows the LED lamp which concerns on this invention. It is the XI-XI line expanded sectional view of FIG. Is a plan view partially cut away showing the tube holding the radiator support used in the LED lamp according to the present invention. It is an enlarged side view which shows the tubular body holding the thermal radiation support body used for the LED lamp which concerns on this invention. It is the XIV-XIV sectional view taken on the line of FIG. It is a side view which shows the tubular body used for the LED lamp which concerns on this invention. It is the XVI-XVI sectional view taken on the line of FIG. It is the XVII-XVII sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat radiation support body 1a Body of heat radiation support body 1a1 Outer peripheral surface 11 Support groove 12, 13, 14 Wiring groove 16 Opening 17 Heat radiation film 2 Substrate with LED 21 Heat radiation film 3 LED (light emitting diode)
5 LED lamp 6 Tube 61, 62 Holding part (holding means)
61a, 62a Holding part 63 Storage chamber 65 Heat radiation film

Claims (3)

A heat dissipating support for an LED lamp having a support groove, a substrate inserted and supported in the support groove of the heat dissipating support, and a plurality of LEDs serving as light sources in its length direction, a holding means, and an interior And a cylindrical tube body each having a storage chamber provided on the back side of
A wiring groove that is cut from the outer peripheral surface on the back side toward the support groove side is formed in the main body of the heat dissipation support, and the support groove is formed on the support side that is opposite to the back side. , the opening of the supporting groove is provided towards the irradiation direction of the LED, together with the outer peripheral surface is formed in a convex arc surface, it is possible close contact with the inner peripheral surface of the tube,
The LED can be irradiated from the storage chamber toward an irradiation side opposite to the back side of the tubular body,
The holding means comprises a plate-like holding portion protruding so as to face each other inward from the inner peripheral surface at the position on the back side of the tubular body,
The two plate-like holding portions are formed over the entire length along the length direction of the tubular body, and a gap is formed between the tip portions of both holding portions,
The storage chamber is formed by a space surrounded by the inner peripheral surface on the back side in the tubular body and the holding portion,
The heat dissipating support inserted and arranged in the storage chamber of the tubular body is held in a state sandwiched between the both holding portions and the inner peripheral surface of the tubular body of the storage chamber. lamp. The front ends of both holding portions are holding portions bent toward the back side of the tube, and the heat dissipation support in the storage chamber is sandwiched between the holding portions of the holding portions and the inner peripheral surface of the tube. LED lamp according to claim 1, characterized in that it is held in a state. The outer peripheral surface on the back side of the heat radiating support is covered with a heat radiating film, and is in close contact with the inner peripheral surface of the tube through the heat radiating film, and is opposite to the LED mounting surface of the substrate. The back surface, which is a surface, is covered with a heat radiating film and is in close contact with the inner surface of the support groove of the heat radiating support, and the outer peripheral surface of the back portion of the tubular body is opposed to the outer peripheral surface on the back side of the heat radiating support member A strip-shaped heat-dissipating film is formed along the length direction, and the heat-dissipating film of the tube located outside, the heat-dissipating film of the heat-dissipating support located in the middle, and the inside position to that claim 1 or claim 2 LED lamps according heat dissipation film of the substrate is characterized that you have a heat dissipation film of three layers spaced.

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