JP2013122899A - Lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provided a high-output lamp that utilizes a light-emitting device as a light source.SOLUTION: The lamp includes a plurality of plate-shaped light source units 110, each of which has a mounting substrate 12 where LEDs 11 are mounted on the front surface 63A of a base substrate 63, and which are arranged around an axial line K with the back surfaces 63B of the respective base substrates 63 faced inward. A housing 130 for housing each lead wire 25 from the plurality of light source units 110 is provided on the axial line K. The plurality of light source units 110 are supported by the housing 130, and a room R for air distribution is provided on the back surface 63B of the respective base substrates 63.

Description

  The present invention relates to a lamp using a light emitting element such as an LED (Light Emitting Diode) or an organic EL (Electro Luminescence) as a light source.

  In recent years, with an increase in output and cost of an LED, which is a kind of semiconductor light-emitting element, a cap-type LED lamp that can be used as an alternative to a light bulb has been proposed and put into practical use (for example, see Patent Document 1). ).

JP 2010-010134 A

However, in the present situation, there is no LED lamp suitable for use as a substitute for a high-power type lamp such as a high intensity discharge (HID) lamp.
An object of the present invention is to solve the above-described problems of the prior art and provide a lamp capable of high output such as an HID lamp using a light emitting element as a light source.

  In order to achieve the above object, the present invention includes a plurality of flat light source units each having a mounting substrate on which a light emitting element is mounted on the surface of the base, and these light source units are axially oriented with the back surface of each base facing inward. A container that is arranged around and accommodates each lead wire from the plurality of light source units is provided on the axis, supports the plurality of light source units on the container, and air circulates on the back surface side of each substrate. It is characterized by providing a space.

  In the lamp according to the present invention, one end of each of the plurality of light source units is supported by the housing body, and the other end is supported by a front end of a column extending from the housing body.

  Moreover, the present invention is characterized in that, in the lamp, one end of each of the plurality of light source units is cantilevered around the container.

  In the lamp described above, the other end of the plurality of light source units may be coupled by a coupling member, and the coupling member may be provided with an opening that allows the space to communicate with the outside in the axial direction. .

  Moreover, the present invention is characterized in that in the lamp described above, a cap is provided in the housing.

  Further, the present invention is characterized in that, in the lamp described above, a connector is attached to the wiring from the plurality of light source units, and a substrate into which the connector is inserted is provided inside the container. To do.

  Moreover, the present invention is characterized in that in the lamp described above, a plurality of radiating fins are provided on the back surface of the base.

  According to the present invention, a plurality of flat light source units having a mounting substrate on which a light emitting element is mounted on the surface of the base are provided, and the light source units are arranged around the axis with the back surface of each base facing inward. Since a housing for housing each lead wire from the light source unit is provided on the axis, the plurality of light source units are supported by the housing, and a space through which air flows is provided on the back side of each base. By arranging the light source units around the axis, it is possible to obtain a brightness equivalent to a high-power type lamp such as an HID lamp, and a space through which air flows is provided on the back side of each substrate. The heat dissipation structure can efficiently dissipate heat from the light emitting element and the mounting substrate from the back surface of the substrate without increasing the size of the lamp. As a result, even when the light emitting element is used as a light source and the light emitting element has a high output, sufficient cooling performance can be obtained, and high brightness light and high output light such as an HID lamp can be obtained. Therefore, it is possible to provide a lamp that is suitable for use in lighting applications that require the

It is a perspective view which shows the structure of the LED lamp which concerns on embodiment of this invention. It is a top view which shows the structure of a LED lamp. It is sectional drawing which shows the structure of an LED lamp. It is a disassembled perspective view which shows the structure of an LED lamp. It is a perspective view which shows the structure of a support body. It is a perspective view which shows the structure of a light source unit. It is a perspective view which shows the inside of the light source unit which removed the waterproof cover. It is a rear view of a light source unit. It is a perspective view which shows the structure of the LED lamp which concerns on 2nd Embodiment of this invention. It is a disassembled perspective view of an LED lamp. It is a disassembled perspective view which shows the structure of the LED lamp which concerns on another embodiment of 2nd Embodiment. It is a perspective view which shows the structure of the LED lamp which concerns on 3rd Embodiment of this invention. It is a disassembled perspective view of an LED lamp. It is sectional drawing of a light source unit. It is a perspective view which shows the inside of a light source unit. It is a rear view of a light source unit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
1-4 is a figure which shows the structure of the LED lamp 1 which concerns on this embodiment, FIG. 1 is a perspective view, FIG. 2 is a top view, FIG. 3 is sectional drawing, FIG. 4 is a disassembled perspective view.
As shown in FIG. 1, the LED lamp 1 is a die-type lamp having a base 40 using a LED 11 as an example of a light emitting element as a light source, and can be used with the base 40 mounted on an existing socket. Like the arc tube, it extends like a rod and emits radiated light almost uniformly from the entire periphery, and has a light output that can be used in place of a high-power type existing discharge lamp such as an HID lamp. The LED lamp 1 is waterproofed so that it can be used outdoors.

  However, while the discharge lamp is lit with AC power, the light emitting elements such as LEDs are lit with DC power. Therefore, when the LED lamp 1 using the LED 11 as a light source is lit with an AC commercial power supply, DC power is supplied to the LED lamp 1 through a power supply circuit that converts the commercial power supply into DC power. The LED lamp 1 of the present embodiment has a configuration in which a power supply circuit is provided on the socket side without incorporating a power supply circuit, and DC power is input from the socket through a base. In other words, when the LED lamp 1 is mounted on an existing lamp for a discharge lamp, the ballast included in the lamp is replaced with a power supply circuit.

Next, the configuration of the LED lamp 1 will be described in detail.
As shown in FIGS. 1 to 4, the LED lamp 1 includes the base 40, a support 20 that extends in a columnar shape perpendicular to the base 40, and a mounting body 35 that attaches the base 40 to the lower end of the support 20. And a plurality (three in the present embodiment) of light source units 10 supported around the support 20. The base 40 is of a screw type (rotating type) generally called an E type base such as E26 type or E39 type, and is configured according to the existing size, and is screwed into an existing socket and attached. It is possible. A direct current power is supplied to the base 40 through a socket (not shown) and supplied to each light source unit 10 in series. The base 40 may be a plug-in type.

FIG. 5 is a perspective view showing the configuration of the support 20.
The support body 20 is a member that supports the light source unit 10 and connects the lead wire 25 (see FIG. 3) extending between the light source unit 10 and the base 40 without exposing to the outside. And a column body 26.

  The container 30 has a substantially columnar shape, and a screw hole 24 for screwing the light source unit 10 is formed on the outer peripheral surface 32 of the container 30. Above the screw hole 24 (on the upper surface 31 side). An introduction hole 54 through which the lead wire 25 is drawn is formed at a position shifted to the position. The screw holes 24 are formed at equal intervals around the axis K which is the central axis of the container 30 by the number of the light source units 10 to be supported. That is, the light source units 10 are screwed into the respective screw holes 24 with the screws 22A, so that these light source units 10 are supported around the axis K at equal intervals. As will be described in detail later, the light source unit 10 has a substantially rectangular shape in plan view, and is supported in a cantilevered state in which the lower end is screwed with a screw 22A and extends upward substantially parallel to the axis K. Is done. The other end portion (the other end) 53 on the upper end side of the light source unit 10 is supported on the column body 26 by screws 22B. With these, the light source unit 10 is supported on the support body 20 at the lower end side and both end portions on the upper end side. The

  On the outer peripheral surface 32 of the container 30, the screw hole 24 and the introduction hole 54 can be closely attached to the back surface shape (planar shape in the present embodiment) of the light source unit 10 (planar surface in the present embodiment). Formed). Therefore, in a state where the light source unit 10 is screwed and supported in the screw hole 24, the back surface of the light source unit 10 covers the introduction hole 54 in a sealed state in which the light source unit 10 is in close contact with the periphery of the introduction hole 54. By pulling out the lead wire 25 from the back side and drawing it into the housing 30 through the opposing introduction hole 54, the lead wire 25 can be extended between the light source unit 10 and the housing 30 without being exposed to the outside.

  The column body 26 functions to supplement the support of the light source unit 10 that is cantilevered by the housing body 30, forms a column shape that extends along the axis K of the housing body 30, and is integrally formed coaxially with the axis K. Is provided. The column body 26 is not supported in close contact with the entire back surface of the light source unit 10 but is supported so as to expose most of the back surface of the light source unit 10. Specifically, the column body 26 has a shape (in this embodiment) in which the ends of substantially plate-like arms (convex portions) 21 corresponding to the number of light source units 10 to be supported (three in this embodiment) are combined. Further, each arm 21 has a shape extending radially around the axis K at equal intervals.

  The column body 26 is erected on the upper surface 31 of the container 30 so that the screw hole 24 and the introduction hole 54 are positioned in the extending direction of each arm 21, and the light source unit 10 is extended upward in the container 30. The arm 21 is configured to be positioned on the back surface of the light source unit 10 when attached in the posture. The front surface of each arm 21 faces the back side of the light source unit 10, and this surface is configured as a flat contact surface 21 </ b> A that is in close contact with the back surface of the light source unit 10. A screw hole 24B is formed at the upper end of the contact surface 21A, and the upper end of the light source unit 10 is screwed into the screw hole 24B with a screw 22B.

  Here, the support body 20 including the column body 26 and the housing body 30 is formed by extruding a material having excellent thermal conductivity, for example, an aluminum alloy material. The arm 21 of the column body 26 is formed in the longitudinal direction. A plurality of radiating fins 23 extending along the extending surface are provided. Since the back surface of the light source unit 10 is in close contact with the contact surface 21 </ b> A of each arm 21, the heat of the light source unit 10 is transferred to the arm 21 and efficiently radiated from the radiation fins 23. In addition, the shape of the radiation fin 23 provided in the arm 21 is arbitrary, and a configuration in which the arm 21 is formed in an uneven shape may be employed.

  The arm 21 of the support 20 is such that the contact surface 21A is slightly higher in the center than the both ends with respect to the longitudinal direction, that is, a surface with which a contact portion 51 described later on the back side of the light source unit 10 contacts. However, it is formed in a side-viewing arc shape that is slightly curved. That is, the light source unit 10 is screwed to the support body 20 with screws 22A and 22B at both ends on the lower end side and the upper end side in the longitudinal direction. Both ends tend to bend in a side arch shape having a shape closer to the support body 20 than the central portion 55 (see FIG. 8). Since the contact surface 21A of the arm 21 is curved in the longitudinal direction so as to be in close contact with the bending of the light source unit 10 when screwed, the adhesion between the arm 21 and the light source unit 10 is enhanced, and the light source unit The heat of 10 can be efficiently transferred to the support 20 and radiated.

As shown in FIG. 5, a flange-shaped flange portion 38 that travels to the outer periphery is formed on the edge portion on the bottom surface side of the outer peripheral surface 32 of the container 30. As shown in FIG. 3, the attachment body 35 to which the base 40 is attached is joined in a watertight manner.
Specifically, as shown in FIG. 3 and FIG. 4, the attachment body 35 is provided with a substantially cylindrical column part 39 and a bowl-shaped part that is provided at the edge on the upper end side of the column part 39 and travels to the outer periphery. The flange portion 41 is integrally provided. A ring groove 42 for fitting an O-ring (not shown) for waterproofing is provided along the edge in the upper surface 41A of the flange portion 41, and the upper surface of the flange portion 41 of the mounting body 35. Waterproofing is achieved by connecting 41A to the bottom surface 34 of the flange portion 38 of the container 30 in close contact with each other by screwing or bonding. That is, the container 30 is waterproofed with the bottom surface 34 closed by the base 40.

The base 40 is attached to the cylindrical portion 39 of the attachment body 35 from below. A pair of lead wires 25 and 25 for positive potential and negative potential drawn from the light source unit 10 into the housing 30 passes through the attachment body 35 and is electrically connected to the base 40 as shown in FIG. Connected to.
Specifically, a male connector 27 is attached to the tip of each lead wire 25, 25. Inside the container 30, there is provided a communication path 33 that communicates with each introduction hole 54 and opens to the bottom surface 34 of the container 30. Each communication path 33 is installed on a substrate 45 having a pattern formed thereon. A female connector 45A is inserted. Wiring from the mounting board 12 of each light source unit 10 is connected to the female connector 45A through the lead-out hole 17 and the introduction hole 54, and is collected on the pattern of the board 45 on which the female connector 45A is installed and connected in series. , Extending to the attachment body 35.

As shown in FIG. 4, the attachment body 35 is also provided with introduction paths 36 connected to the communication paths 33 of the container 30, and lead wires 25 and 25 are introduced from the introduction paths 36. The attachment body 35 is formed with passages 36A and 36B for drawing out the two lead wires 25 and 25 from the bottom surface, and the lead wires 25 and 25 drawn out through the passages 36A and 36B are connected to the base 40. Is done.
According to this configuration, it is possible to improve the workability of wiring connection from each light source unit 10 to the base 40 and to reduce the size of the housing 30 that houses the wiring.

Thereby, each light source unit 10 and the base 40 are electrically connected by the lead wires 25, 25, and each light source unit 10 is turned on by the DC power supplied through the base 40. At this time, the lead wires 25 and 25 are introduced into the introduction hole 54 and the lead-out hole 17 (described later) provided in a place where the light source unit 10 and the support 20 (more precisely, the container 30) are in close contact with each other. Since the light source unit 10 is drawn into the support 20 through the lead wires 25 and 25, the introduction holes 54, and the lead-out holes 17 are prevented from being exposed to the outside, and waterproofing between them can be obtained.
In other words, by providing the support 20 with the light source unit 10 that is waterproof, the entire LED lamp 1 can be waterproofed.

  6 is a perspective view showing the configuration of the light source unit 10, and FIG. 7 is a perspective view showing the inside of the light source unit 10 with the waterproof cover 14 removed. FIG. 8 is a rear view of the light source unit 10.

As described above, the light source unit 10 emits radiated light using the LED 11 as a light source, and is configured in a rectangular shape extending along the axis K of the support 20.
The LED lamp 1 of this embodiment includes three light source units 10, and these light source units 10 face the back surface 13 </ b> B of each base 13 inward and extend in the same direction as the axis K of the support 20. Around the axis K, they are annularly arranged at equal intervals and supported by the support 20. Thereby, light will be radiated | emitted to the range over the perimeter of the axis line K. FIG.
These light source units 10 all have the same structure and shape. When the LED lamps 1 having different light outputs are configured, the number of light source units 10 corresponding to a desired light output is provided around the support 20. Arranged.
In the LED lamp 1, when the light source unit 10 is arranged around the axis K, a gap G is provided between the adjacent light source units 10, which will be described later.

The configuration of the light source unit 10 will be described in detail. As shown in FIGS. 4 and 6 to 8, the light source unit 10 includes a mounting board 12 on which the LEDs 11 are mounted, and an electrical insulating member that is not shown in the mounting board 12. And a base 13 attached to the surface 13A.
The mounting board 12 is a substantially rectangular plate-like printed wiring board, on the surface of which a plurality of LEDs 11 and electrode patterns 16 constituting a charging unit are formed by soldering lead wires 25 and 25. Yes.

The LED 11 is formed by arranging a large number of LED elements, in the present embodiment, 240 LED elements, for example, in a lattice shape within a substantially rectangular range in plan view, and molding the surface thereof with a resin material with a small thickness. Yes, almost the entire surface emits light. As shown in FIG. 7, a plurality of (three in the illustrated example) LEDs 11 are arranged in series on the mounting substrate 12 with almost no gap, and these LEDs 11 can obtain linear light emission. . Thus, LED11 consists of many LED elements, and since it is comprised so that the whole may shine, it has the effect of reducing a glare by increasing the light emission area.
Moreover, the ratio of the area | region which LED11 occupies with respect to the surface area of the mounting board | substrate 12 occupies more than half, and it seems that the surface of the mounting board | substrate 12 light-emits entirely.
The electrode pattern 16 is formed at the end of the mounting substrate 12 and is electrically connected to each LED 11 in series or in parallel through a printed wiring (not shown).

The base 13 is a rectangular plate formed by extruding a metal material having high thermal conductivity such as aluminum, for example, and functions as a base for packaging the mounting substrate 12 and a heat sink that receives heat from the LED 11 and dissipates heat. To do.
More specifically, as shown in FIG. 7, the base 13 is formed in a thin plate shape (plate shape with a flat front and back) that can accommodate the mounting substrate 12 therein, and the surface 13A has a mounting substrate on the surface 13A. A mounting portion 13 </ b> C is formed as a concave portion that accommodates 12 substantially flush. As shown in FIG. 4, the mounting portion 13 </ b> C is formed in a planar shape that is in close contact with the mounting substrate 12, and heat transfer from the mounting substrate 12 to the base body 13 is enhanced.
A bulging portion 12A that bulges outward in the lateral direction is formed at the substantially central portion on both side surfaces of the base 13 in the short direction, and the mounting substrate 12 housed in the mounting portion 13C is formed in each bulging portion 12A. A screw 12B for holding down the screw is screwed.

  As shown in FIG. 7, the mounting portion 13 </ b> C of the base body 13 is connected to the mounting substrate 12 by penetrating the front and back of the base body 13 on one end (one end) 52 side of the mounting substrate 12 close to the electrode pattern 16. A lead-out hole 17 is provided for drawing out the lead wires 25, 25 to the back side. A notch 19 </ b> A through which a screw 22 </ b> A that is screwed to the housing 30 of the support 20 is passed is provided at one end 52 near the lead-out hole 17. Similarly, the other end portion 53 of the base body 13 is provided with a notch 19B through which a screw 22B screwed to the arm 21 of the support 20 is passed, and the both ends 52 and 53 are screwed to the support 20. Fixed.

The lead-out hole 17 is provided at a position connected to the introduction hole 54 of the container 30 when the base 13 is fixed to the support 20. Accordingly, as described above, the lead wires 25 and 25 connected to the electrode pattern 16 of the mounting substrate 12 are drawn into the housing 30 without being exposed to the outside through the lead-out hole 17 and the introduction hole 54. .
The lead-out hole 17 that opens to the back surface 13B of the base 13 is sealed with an appropriate sealing material so that the back surface 13B side is waterproofed.

The waterproof structure on the surface 13A side of the base 13 will be described. A groove 18 surrounding the mounting portion 13C is formed on the surface 13A as shown in FIG. 7, and the illustration of the groove 18 is omitted. However, as shown in FIG. 6, the waterproof cover 14 is attached so that the waterproof packing is fitted and the waterproof packing is crushed. Further, in order to waterproof the surface 13 </ b> A of the base 13 and the waterproof cover 14, in addition to fitting a waterproof packing in the groove 18, the groove 18 may be filled with a caulking agent.
The waterproof cover 14 includes a dome-shaped cover portion 104 formed using a light-transmitting material, for example, a resin material, in an elliptical shape in plan view and a semicircular cross section. Around the cover portion 104 of the waterproof cover 14 is integrally formed with a waterproof packing that is in contact with the surface 13A of the base 13 and fitted into the groove 18, or a flat plate flange 114 that presses the caulking agent against the surface 13A. Thus, the close contact between the flat flange 114 and the waterproof packing of the groove 18 can prevent water from entering the mounting portion 13C on the inner side, and the mounting substrate 12 and the charging portion are protected from water immersion.

  According to this configuration, in order to make the light source unit 10 waterproof, for example, when the entire lamp 1 is covered with a waterproof cover, convection of air is delayed, so that a sufficient cooling effect cannot be obtained. According to this embodiment, the waterproof structure is realized by covering only the LEDs 11 of the individual light source units 10 and the mounting substrate 12 on which the LEDs 11 are mounted with the waterproof cover. Thereby, the lamp 1 can realize the waterproof structure of the LED 11 of each light source unit 10 and the mounting substrate 12 on which the LED 11 is mounted, and has a structure in which other portions are exposed to the outside air, thereby obtaining a high cooling effect. Can do.

  With the above configuration, the waterproof light source unit 10 is configured. And since the lead wires 25, 25 extending from the light source unit 10 are drawn into the support body 20 (container 30) from the introduction hole 54 provided in the surface where the light source unit 10 is closely adhered and sealed, The entire LED lamp 1 can be easily waterproofed.

  The attachment structure of the waterproof cover 14 to the base body 13 will be described. At each corner 14A of the flat plate flange 114, a locking portion 14B for locking the waterproof cover 14 to the base body 13 is provided. At the tip of each locking portion 14B, there is provided a locking claw 14C that is hooked on the back surface 13B of the base 13 when the waterproof cover 14 is placed on the front surface 13A of the base 13. When the waterproof cover 14 is attached to the base 13, the locking claw 14 </ b> C contacts the back surface 13 </ b> B of the base 13 with the locking portion 14 </ b> B elastically deformed and the locking claw 14 </ b> C contacting the side surface of the base 13. Push in until it gets caught. On the side surface of the base 13, a stopper 13 </ b> D that is locked to the locking portion 14 </ b> B of the waterproof cover 14 and prevents the waterproof cover 14 from sliding in the longitudinal direction of the base 13 is provided. According to these configurations, the light source unit 10 can be waterproofed with a simple structure. Further, the waterproof cover 14 can be easily attached to the base 13 without using screws or the like, and the assemblability is improved.

By the way, in this LED lamp 1, in order to obtain a high light output like an HID lamp, each LED element of the LED 11 is increased in output and / or the number of LED elements is increased. For this reason, the individual heat generation of the LED 11 is very large, and the light source unit 10 using the LED 11 as a light source is required to have high heat dissipation (coolability). In particular, the die-type LED lamp 1 is different from a lamp or the like, and it is necessary to process heat generation by itself, so that it is difficult to increase the output.
Therefore, in this embodiment, the heat dissipation of the LED lamp 1 is increased as follows.

That is, in the light source unit 10, the mounting substrate 12 is provided in close contact with the surface 13A of the base 13 formed of a high thermal conductivity material, and a large number of heat dissipation is performed on the back surface 13B of the base 13 as shown in FIG. The fins 15 are integrally provided so that the heat generated by the LEDs 11 on the mounting substrate 12 is radiated through the radiation fins 15.
More specifically, the contact surface 21A of the arm 21 of the support 20 is brought into contact with the back surface 13B of the base 13, but the width of the contact surface 21A is sufficiently larger than the width W of the back surface 13B of the base 13. It is small (about one third in this embodiment) and is configured so that the remaining part is exposed. In the present embodiment, the contact surface 21A of the arm 21 is in contact with the center of the back surface 13B of the base body 13 along the longitudinal direction, and three radiating fins 15 extending in parallel with the arm 21 are provided on both sides thereof. It has been. These heat radiation fins 15 are provided between the stoppers 13D that prevent the waterproof cover 14 provided at both ends of the base 13 from being displaced, and more precisely between the bulging portions 12A and the stoppers 13D. It has been. That is, three radiating fins 15 are provided in four sections.

  The three radiating fins 15 of each section are formed from three radiating fins 15 having different heights from the inner side (arm 21 side) toward the outer side as shown in FIG. Composed. According to this configuration, by increasing the heat dissipating area in the vicinity of the LED 11 provided on the surface 13A of the base 13, the heat of the LED 11 can be dissipated efficiently, and all the heat dissipating fins 15 are formed in the same size. Compared with this, the light source unit 10 can be reduced in weight.

When the light source unit 10 is supported on the arm 21 of the support 20, the arm 21 contacts with a contact surface 21A that is narrower than the width W of the light source unit 10. Therefore, as shown in FIG. A space R extending along the axis K of the support 20 is formed between the support 20 and the back surface 13B. This space R functions as a ventilation path extending from the upper end to the lower end of the back surface 13B of each light source unit 10 and connected to the outside. Therefore, the heat generated by the LEDs 11 can be sufficiently dissipated from the radiation fins 15 on the back surface 13B of each light source unit 10. In other words, the LED lamp 1 having sufficient heat dissipation performance can be configured without relying on heat transfer to the support 20 side because the light source unit 10 has a performance capable of sufficiently dissipating the heat generated by the LED 11 as a single unit. Thereby, the material of the support body 20 can be selected irrespective of the heat conduction performance, an inexpensive material can be used, and the cost can be reduced.
Of course, like this embodiment, the support body 20 including the arm 21 is formed of a high heat conductive material, so that the heat generated by the light source unit 10 is transferred to the support body 20 to assist heat dissipation, and higher heat dissipation is achieved. You can have it.

  Further, as described above, since the light source units 10 are arranged with the gaps G around the axis K of the support 20, the gaps G communicate with the space R, and air flows through the space R. It is easy. Thereby, the heat dissipation from the radiation fin 15 facing the space R is enhanced.

As described above, according to the LED lamp 1 of the present embodiment, the following effects can be obtained.
That is, according to the present embodiment, a plurality of flat light source units 10 having a mounting substrate 12 on which the LEDs 11 are mounted on the surface 13A of the base 13 are provided, and these light sources 10 have the back surface 13B of each base 13 on the inside. A container 30 that is arranged around the axis K and accommodates the lead wires 25 and 25 from the plurality of light source units 10 is provided on the axis, and supports the plurality of light source units 10 on the container 30. A space R through which air flows is provided on the back surface 13B side of the base 13.
Thereby, since the plurality of light source units 10 are arranged around the axis K, brightness equivalent to a high output type lamp such as an HID lamp can be obtained. Further, since the LED 11 and the mounting substrate 12 on which the LED 11 is mounted are unitized as the light source unit 10, the output of the LED lamp 1 can be changed by changing the number of the light source units 10 to be used. , 200 W, 300 W, or 400 W HID lamps can be manufactured using a common light source unit 10 with different brightness. Further, in the LED lamp 1, since the light source unit 10 is modularized, the light source unit 10 can be replaced for each unit at the time of maintenance, and the maintainability of the LED lamp 1 can be improved. Furthermore, since the plurality of light source units 10 are supported by the container 30 with the back surface 13B of each base 13 facing inward, and the space R through which air flows is provided on the back surface 13B side of each base 13, the LED lamp 1 is made large. A heat dissipation structure that can efficiently dissipate heat from the LED 11 and the mounting substrate 12 from the back surface 13B of the base body 13 can be formed. Therefore, it is possible to provide the LED lamp 1 that can replace the high-power type HID lamp in terms of brightness and size by using the LED 11 as a light source. The LED lamp 1 can be manufactured easily and at low cost.

  Further, according to the present embodiment, a plurality of heat radiation fins 15 are provided on the back surface 13B of the base body 13 and are supported by the support body 20 so that air flows between the heat radiation fins 15. The heat of the LED 11 and the mounting substrate 12 provided on the surface 13A of the base 13 can be efficiently radiated.

  Further, according to the present embodiment, one end (one end) 52 of the plurality of light source units 10 is supported by the housing 30 and the other end 53 is supported by the tip of the support 20 extending from the housing 30. The light source unit 10 can be stably supported.

  In addition, according to the present embodiment, since the base 40 is provided in the housing 30, the LED lamp 1 can be connected to the socket of the existing lamp with the base 40, and the lamp socket or the lamp can be attached. Without change, the LED lamp 1 can be easily used as an alternative to an HID lamp or the like.

  Further, according to the present embodiment, the male connector 27 is attached to the wiring 25 from the plurality of light source units 10, and the substrate 45 into which the connector 27 is inserted is provided inside the housing 30. The wiring 25 from the mounting substrate 12 of each light source unit 10 can be combined on the pattern of the substrate 45 and connected in series, improving the wiring connection workability from each light source unit 10 to the base 40, and The housing 30 that houses the wiring can be downsized.

Second Embodiment
In the first embodiment described above, the configuration in which both end portions 52 and 53 of the light source unit 10 are supported at both ends around the support body 20 including the housing body 30 and the column body 26 is illustrated. However, the support body 20 may have a configuration in which the column body 26 is omitted. In the present embodiment, a configuration in which the light source unit 10 is cantilevered around the support body 20 including only the housing body 30, that is, the housing body 30 will be described.

  FIG. 9 is a perspective view showing the configuration of the LED lamp 100 according to the present embodiment, and FIG. 10 is an exploded perspective view of the LED lamp 100. In these drawings, the same components as those of the LED lamp 1 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

As shown in FIGS. 9 and 10, the light source unit 10 is cantilevered at its one end 52 around the axis K by the container 30.
With this configuration, the LED lamp 100 can be reduced in weight, and a wide space R can be provided on the back surface 13B side of the base body 13 of the light source unit 10, so that a large amount of air can be circulated in the space R. . Thereby, the heat radiation efficiency from the back surface 13B side of the base 13 can be improved, and the heat from the LED 11 and the mounting substrate 12 provided in the light source unit 10 can be efficiently radiated. Further, when the light source unit 10 cantilever-supports one end portion 52 around the housing 30, the entire back surface 13 </ b> B of the base 13 can be used as a heat radiating surface. As shown in FIG. 11, the heat dissipating fins 115 extending in the longitudinal direction of the back surface 13B are arranged on the back surface 13B of the base 13 in the short direction without gaps so as to widen the heat dissipating area of the back surface 13B. May be.

FIG. 11 is a diagram showing an LED lamp 101 according to another embodiment of the second embodiment. As shown in FIG. 11, the LED lamp 101 includes a plurality of light source units 10 with one end 52 cantilevered around the housing 30, and the other end 53 of the light source unit 10 is a coupling member 62. Connected to each other and fixed to each other. The coupling member 62 will be described in detail in a third embodiment described below.
Further, the LED lamp 101 includes a tapered surface 41 </ b> B formed at a predetermined angle with respect to the cylindrical portion 39 on the flange portion 41 of the attachment body 35. The angle of the tapered surface 41 </ b> B with respect to the cylindrical portion 39 is set to an arbitrary angle that can improve the workability when the base 40 is soldered and fixed to the attachment body 35.

<Third Embodiment>
In the first embodiment described above, the light source unit 10 is configured such that one end portion 52 is supported by the housing body 30 and the other end portion 53 is supported by the column body 26 extending along the axis K from the upper surface of the housing body 30. Met. The column body 26 includes a plate-like arm 21 that extends radially around the axis K, and supports the light source unit 10 with the arm 21 in close contact with the back surface of the light source unit 10. Incidentally, the LED lamp 1 can be lit horizontally by arranging the axis K in the horizontal direction in addition to the vertical lighting using the axis K arranged in the vertical direction.
However, since heat flows from the lower side toward the upper side, when the LED lamp 1 is horizontally lit, the heat flow radiated from the light source unit 10 disposed on the lower side during the horizontal lighting is the column 26. It was hindered by that and it was not possible to dissipate heat efficiently. Further, the column body 26 is heated by the heat radiated from the light source unit 10 disposed on the lower side during horizontal lighting, and the heat is transferred to the light source unit 10 through the arm 21. Further, the column 26 is a metal member, which leads to an increase in the total weight of the LED lamp 1 as a whole.

Moreover, since LED11 has arrange | positioned LED11 in the axial direction of the column 26, the gravity center of LEDlamp 1 was on the front end side. For this reason, when the LED lamp 1 installed for horizontal lighting is subjected to vibration or the like, an overload is applied to the base 40 or the socket located away from the center of gravity. In particular, in the high output type LED lamp 1 in which a plurality of light source units 10 are used, the amount of heat dissipated is large and the total weight is large, so that the upper light source unit 10 has a short life due to heat during horizontal lighting, or There is a possibility that problems such as breakage of the cap 40 and the socket may occur.
The object of the third embodiment is to solve the above-mentioned problems of the technology and to provide an LED lamp 102 that is light in weight and excellent in heat dissipation efficiency. In addition, in the following description, about the structure same as the LED lamp 1 of 1st Embodiment, the same code | symbol is attached | subjected in a figure and the description is abbreviate | omitted.

FIG. 12 is a perspective view showing a configuration of the LED lamp 102 according to the third embodiment of the present application, and FIG. 13 is an exploded perspective view of the LED lamp 102.
As shown in FIGS. 12 and 13, the LED lamp 102 includes a base 40, a storage body 130 provided perpendicular to the base 40, a mounting body 35 that attaches the base 40 to the lower end of the storage body 130, And a plurality of (four in this embodiment) light source units 110 supported around the container 130. The container 130 is a member that supports the light source unit 110 and connects the lead wire 25 (see FIG. 3) extending between the light source unit 110 and the base 40 without being exposed to the outside.

The container 130 has a substantially columnar shape, and a screw hole 24 for screwing the light source unit 110 is formed on the outer peripheral surface 132 of the container 130. Above the screw hole 24 (on the upper surface 31 side). An introduction hole 54 for drawing the lead wire 25 is formed at a position shifted to (see FIG. 11). The screw holes 24 are formed at equal intervals around the axis K, which is the central axis of the container 130, by the number of the light source units 110 to be supported. That is, the light source units 110 are screwed into the respective screw holes 24 with the screws 22A, so that these light source units 110 are supported around the axis K at equal intervals. The container 130 is formed in a cylindrical shape having a predetermined length between the screw hole 24 and the flange portion 38, and the outer peripheral surface 132 between the screw hole 24 and the flange portion 38 has a model number or the like. A nameplate area 133 to be written is provided.
The light source unit 110 has a substantially rectangular shape in plan view, and one end portion 52 on the lower end side is screwed to the housing 130 with a screw 22A, and is supported in a cantilever support state extending upward substantially parallel to the axis K. The Further, the other end 53 which is the end opposite to the one end 52 of the plurality of light source units 110 is coupled and supported by the coupling member 62.

The coupling member 62 is formed of a metal material having excellent rigidity and has a polygonal annular shape (ring shape) that couples the other end 53 that is opposite to the one end 52 of the plurality of light source units 110. An opening 62 </ b> A that is formed and communicates the space R <b> 1 to be described later in the direction of the axis K is provided. The coupling member 62 may have a plate shape having at least one opening in addition to the ring shape. The coupling member 62 is formed in advance in a shape that can fix the other end 53 of the light source unit 110 with one end 52 fixed around the housing 130 to a predetermined position. Further, the coupling member 62 is formed with a strength that does not deform even when the LED lamp 102 is continuously lit by the weight of the light source unit 110 when the LED lamp 102 is lit horizontally.
The coupling member 62 includes an end surface pressing portion 68A that makes surface contact with the upper end surface of each light source unit 110 and an outer periphery pressing portion 68B that presses each light source unit 110 from the outer peripheral side. The coupling member 62 is fixed to the light source unit 110 from the opening 62A side by a screw 66 that is screwed from the other end side to a screw fixing portion 67 protruding from the back surface 63B of the light source unit 110.

  According to this configuration, since the other end portion 53 of the light source unit 110 is connected and supported by the coupling member 62, the LED lamp 102 is compared to a configuration in which each light source unit 110 is fixed and supported on the housing 130. The strength of can be improved. For example, if the light source unit 110 is simply fixed to the container 130 with the screws 22A, the light source unit 110 warps outward due to repulsion of an O-ring (not shown) described later interposed between the light source unit 110 and the container 130. there is a possibility. In the present embodiment, the light source unit 110 can be prevented from warping by connecting and supporting the other end portion 53 opposite to the one end portion 52 screwed by the screw 22 </ b> A by the coupling member 62. Further, by connecting the light source unit 110 with the coupling member 62, the light source unit 110 can be positioned, and the light source unit 110 can be supported in parallel to the axis K of the container 130.

  The light source unit 110 emits radiated light using the LED 11 as a light source, and is configured in a rectangular shape extending along the axis K of the container 130. In the LED lamp 102, a plurality of light source units 110 are arranged in an annular manner around the axis K in such a posture that the back surface 63 </ b> B of each base 63 is directed inward and extends in the same direction as the axis K of the container 130. The container 130 is cantilevered. Thereby, light will be radiated | emitted to the range over the perimeter of the axis line K. FIG. All the light source units 110 have the same structure and shape, and when configuring the LED lamps 102 having different light outputs, the number of light source units 110 corresponding to the desired light output is arranged around the housing 130. Is done.

  The light source unit 110 includes a mounting substrate 12 on which the LEDs 11 are mounted, and a base 63 on which the mounting substrate 12 is attached to the surface 63A with an electric insulating member (not shown) interposed therebetween. The base 63 is a rectangular plate formed by extruding a metal material having high thermal conductivity such as aluminum, for example, and functions as a base for packaging the mounting substrate 12 and a heat sink that receives heat from the LED 11 and dissipates heat. To do. More specifically, as shown in FIG. 15, the base 63 is formed in a thin plate shape (plate shape with a flat front and back) that can accommodate the mounting substrate 12 therein, and the surface 63 </ b> A has a mounting substrate on the surface 63 </ b> A. A mounting portion 63 </ b> C is formed as a concave portion that accommodates 12 substantially flush. The mounting portion 63 </ b> C is formed in a planar shape that is in close contact with the mounting substrate 12, and heat transfer from the mounting substrate 12 to the base 63 is enhanced.

  On the outer peripheral surface 132 of the container 130, the periphery of the screw hole 24 and the introduction hole 54 is formed in a shape that can be in close contact with the back surface shape of the light source unit 10. Further, as shown in FIG. 16, a wall portion 17A protruding along the outer periphery of the outlet hole 17 is provided on the back surface 63B of the base 63, and an O-ring (not shown) is provided around the wall portion 17A. Is wrapped around. In a state where the light source unit 110 is screwed and supported in the screw hole 24, the wall portion 17A is inserted into the introduction hole 54, and the O-ring is formed between the back surface 63B of the base body 63 and the outer peripheral surface 132 of the container 130. And the back surface 63B of the light source unit 110 covers the introduction hole 54 in a sealed state in close contact with the periphery of the introduction hole 54. As a result, the lead wire 25 is pulled out from the back surface 63B side of the light source unit 110 and drawn into the housing 130 through the opposed introduction hole 54, so that the lead wire 25 is not exposed to the outside and the light source unit 110 and the housing 130 are exposed. Can be extended between.

  The waterproof structure on the surface 63A side of the base 63 will be described. As shown in FIG. 15, a filling groove 68 surrounding the mounting portion 63C is formed on the surface 63A. As shown in FIG. 14, the filling groove 68 is filled with a waterproof caulking agent 69, and the caulking agent 69 fills a gap with the surface 63 </ b> A of the base 63, and a waterproof cover 64 is attached. Yes. Thereby, waterproofing between the waterproof cover 64 and the surface 63A of the base 63 is maintained, water can be prevented from entering the mounting portion 63C inside the light source unit 110, and the mounting substrate 12 and the charging portion are protected from water immersion. Is done.

  The waterproof cover 64 includes a dome-shaped cover portion 104 that is formed in a plan view elliptical shape and a semicircular cross-section using a light-transmitting material, for example, a resin material. A flange portion 105 is provided around the cover portion 104 of the waterproof cover 64. On the bottom surface side of the flange portion 105, a first flange portion 105 </ b> A that comes into contact with and contacts the outer peripheral edge 63 </ b> D of the base 63 is provided along the inner edge of the cover portion 104. And a second flange portion 105B that forms a gap. A gap G1 formed between the waterproof cover 64 and the base surface 63A by the second flange portion 105B communicates with a space A formed inside the light source unit 110 by the base 63 and the waterproof cover 64. Further, the connecting portion 105C of the first flange portion 105A and the second flange portion 105B is tapered at a position corresponding to the step between the outer peripheral edge 63D of the base 63 and the filling groove 68.

  According to these configurations, when the waterproof cover 64 is covered on the base 63, the caulking agent 69 filled in the filling groove 68 is blocked from protruding outside the light source unit 110 by the outer peripheral edge 63D. Further, since the flange 105 of the waterproof cover 64 is provided with the connecting portion 105C which is tapered at a position corresponding to the step between the outer peripheral edge 63D and the filling groove 68, the caulking agent is collected in the filling groove 68 along the outer peripheral edge 63D. A portion to be inserted is provided, and waterproofing of the surface 63A side of the base 63 can be reliably achieved. Further, since the gap G1 formed between the waterproof cover 64 and the base surface 63A is communicated with the space A inside the light source unit 110 by the second flange portion 105B, the caulking agent applied to the filling groove 68 is provided. Even if the coating amount of 69 varies and does not fit in the filling groove 68, it does not protrude outside the light source unit 110 but protrudes toward the inside, so that the appearance of the light source unit 110 is not impaired.

  According to this configuration, in order to make the light source unit 110 waterproof, for example, when the entire LED lamp 102 is covered with a waterproof cover, the convection of air stagnate, so that a sufficient cooling effect cannot be obtained. According to this embodiment, the waterproof structure is realized by covering only the LED 11 of the individual light source unit 110 and the mounting substrate 12 on which the LED 11 is mounted with the waterproof cover 64. Accordingly, the LED lamp 102 can realize a waterproof structure of the LED 11 of each light source unit 110 and the mounting substrate 12 on which the LED 11 is mounted, and has a structure in which other portions are exposed to the outside air, thereby obtaining a high cooling effect. be able to.

  With the above configuration, the waterproof light source unit 110 is configured. Since the lead wires 25, 25 extending from the light source unit 110 are drawn into the housing 130 from the introduction hole 54 provided in the surface where the light source unit 110 is closely attached and sealed, the entire LED lamp 102 is provided. Can be easily waterproofed.

  Next, a structure for attaching the waterproof cover 64 to the base 63 will be described. The waterproof cover 64 is provided with a locking portion 14 </ b> B for locking the waterproof cover 64 to the base 63 at each corner of the flange portion 105. At the tip of each locking portion 14B, there is provided a locking claw 14C that is hooked on the back surface 63B of the base 63 when the waterproof cover 64 is placed on the front surface 63A of the base 63. When the waterproof cover 64 is attached to the base 63, the locking claw 14C is brought into contact with the back surface 63B of the base 63 in a state where the locking portion 14B is elastically deformed and the locking claw 14C is in contact with the side surface of the base 63. Push in until it gets caught. A stopper 13 </ b> D is provided on the side surface of the base body 63 to be locked to the locking portion 14 </ b> B of the waterproof cover 64 and prevent the waterproof cover 64 from sliding in the longitudinal direction of the base body 63.

As shown in FIGS. 12 and 13, a hole 64 </ b> B into which a screw 22 </ b> A for screwing and fixing the light source unit 110 to the container 130 is inserted is provided in one end portion 64 </ b> A of the waterproof cover 64. As a result, one end portion 64A of the waterproof cover 64 is screwed and fixed to the housing body 130 together with the base 63 by the screw 22A.
The waterproof cover 64 is configured such that the other end portion 64 </ b> C is substantially flush with the other end portion 53 of the light source unit 110. The other end portion 64 </ b> C of the waterproof cover 64 is connected to the base 63 and the coupling member 62 in a state where the other end portion 53 of the light source unit 110 is coupled by the coupling member 62 and the coupling member 62 is fixed to the screw fixing portion 67 by the screw 66. Are sandwiched by the outer peripheral pressing portion 68B.

  According to these configurations, the one end portion 64A of the waterproof cover 64 can be fixed to the base 63 with the screw 22A, and the other end portion 64C can be held from the periphery by the coupling member 62. Thus, since both ends 64A and 64C of the waterproof cover 64 can be held with respect to the base body 63, the waterproof cover 64 can be prevented from being detached or dropped, and the light source unit 110 can be reliably waterproofed. .

By the way, in this LED lamp 102, in order to obtain a high light output like an HID lamp, each LED element of the LED 11 is increased in output and / or the number of LED elements is increased. For this reason, the individual heat generation of the LED 11 is very large, and the light source unit 110 using the LED 11 as a light source is required to have high heat dissipation (coolability). In particular, the die-type LED lamp 102, unlike a lamp or the like, needs to process heat generation by itself, so that it is difficult to increase the output.
Therefore, in this embodiment, the heat dissipation of the LED lamp 102 is improved as follows.

In the light source unit 110, a large number of heat radiation fins 115 are integrally provided on the back surface 63 </ b> B of the base 63 made of a high thermal conductivity material so that the heat generated by the LEDs 11 on the mounting substrate 12 is radiated through the heat radiation fins 115. Yes. A plurality of heat radiation fins 115 are provided in parallel with each other in the width direction of the base 63, and each heat radiation fin 115 extends in the longitudinal direction between the stoppers 13 </ b> D of the base 63.
The light source unit 110 is cantilevered around the container 130 with the back surface 63B of the base 63 facing inward. The light source units 110 are arranged around the axis K of the container 130 with a gap G between the light source units 110. Thereby, in the LED lamp 102, a space R1 extending along the axis K of the container 130 and communicating with the gap G is formed on the back surface 63B side of the base body 63. This space R1 extends from the upper end to the lower end of the back surface 63B of each light source unit 110, is connected to the outside, and functions as a ventilation path. The heat radiated to the space R1 from the heat radiation fin 115 on the back surface 63B of each light source unit 110 is externally transmitted in the radiation direction of the LED lamp 102 and the axis K direction through the gap G and the opening 62A of the coupling member 62. Heat is dissipated.

  As described above, according to the present embodiment, one end of the plurality of light source units 110 is cantilevered around the container 130. According to this configuration, a light source without providing a member that blocks the flow of air flowing through the space R1, such as the column body 26 and the arm 21 of the first embodiment, in the space R1 provided on the back surface 63B side of the light source unit 110. The unit 110 can be supported. Thereby, even when the LED lamp 102 is lit horizontally, air easily flows through the space R1, and the heat dissipation from the heat radiation fin 115 facing the space R1 is enhanced. Further, the total weight of the LED lamp 102 as a whole can be reduced by cantilevering the light source unit 110 around the housing 130 without providing the column body 26 and the arm 21. Further, the light source unit 110 cantilevered around the housing body 130 without providing the column body 26 or the arm 21, the center of gravity of the LED lamp 102 can be provided at a position close to the base 40, and the horizontal lighting is performed. It is possible to prevent an overload from being applied to the base 40 and the socket due to vibrations received by the LED lamp 102 at times.

  Further, according to the present embodiment, the other end (other end portion) 61 of the plurality of light source units 110 is coupled by the coupling member 62, and the coupling member 62 has the opening 62A that communicates the space R1 with the outside in the axis K direction. Provided. According to this configuration, the heat radiated from the heat radiation fin 115 on the back surface 63B of each light source unit 110 to the space R1 is transmitted to the LED lamp via the gap G between the light source units 110 and the opening 62A of the coupling member 62. The heat is radiated to the outside in the radiation direction 102 and the axis K direction. Thereby, air can be easily circulated through the space R1, and the heat radiation from the heat radiation fin 115 facing the space R1 is enhanced, so that the heat generated by the LED 11 can be sufficiently radiated.

  The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the cap-type lamp including the base 40 has been described. However, the present invention is not limited thereto, and a configuration including an insertion-type connector instead of the base 40 may be used.

  Further, for example, in the above-described embodiment, the shape of the column body 26 provided in the support body 20 is exemplified by the Y-shaped cross section in which the end portions of the arms 21 are coupled together. A rod-shaped column may be arranged, and the arms 21 may extend radially from the peripheral surface of the column. At this time, the arm 21 may be configured to be scattered along the axis K and contact the back surface of the light source unit 10.

1, 100, 101, 102 LED lamp (lamp)
10, 110 Light source unit 11 LED (light emitting element)
DESCRIPTION OF SYMBOLS 12 Mounting board | substrate 13, 63 Base | substrate 13A, 63A Surface 13B, 63B Back surface 14, 64 Waterproof cover 15, 115 Radiation fin 20 Support body 21 Protrusion part (arm)
30, 130 container 40 base 52 one end (one end)
53 Other end (other end)
54 Introduction hole 55 Central part 62 Connecting member 62A Opening G Gap K Axis line R, R1 Space

Claims (7)

A plurality of flat light source units each having a mounting substrate on which a light emitting element is mounted are provided on the surface of the base, and these light source units are arranged around the axis with the back surface of each base facing inward. A container for housing the lead wire is provided on the axis,
A lamp characterized in that the plurality of light source units are supported by the housing, and a space through which air flows is provided on the back side of each substrate.   2. The lamp according to claim 1, wherein one end of each of the plurality of light source units is supported by the housing, and the other end is supported by a tip of a column extending from the housing.   The lamp according to claim 1, wherein one end of each of the plurality of light source units is cantilevered around the container.   The lamp according to claim 1 or 3, wherein the other ends of the plurality of light source units are coupled by a coupling member, and an opening is provided in the coupling member to communicate the space with the outside in the axial direction.   The lamp according to any one of claims 1 to 4, wherein a cap is provided in the container.   The wiring from the plurality of light source units is provided with a connector, and a substrate into which the connector is inserted is provided inside the container. Lamp according to item.   The lamp according to any one of claims 1 to 5, wherein a plurality of heat radiation fins are provided on a back surface of the base body.

Images