JP6137231B2 - lamp - Google Patents

Description

  The present invention relates to a lamp.

  Development of LED lamps with high luminous flux that can replace HID (High Intensity Discharged) lamps (for example, mercury lamps) mounted on outdoor or indoor lighting fixtures (street lamp fixtures, street lamp fixtures, high ceiling fixtures, etc.) (For example, refer to Patent Document 1). This is due to requests from the viewpoints of energy saving, long life, and environmental resistance. When the LED light source is at a high temperature, the light emission efficiency is lowered and the lifetime is shortened. In order to increase the luminous efficiency of the LED light source and extend the lifetime, it is desirable to increase the heat dissipation from the LED light source and to lower the temperature of the LED light source as much as possible.

  Patent Document 1 below discloses a lamp in which a plurality of light emitting units are arranged around the central axis of a lamp with a back surface of a flat light emitting unit having a mounting substrate on which light emitting elements are mounted facing inward.

  Patent Document 2 below discloses a configuration in which each of a plurality of light emitting units arranged around a lamp central axis includes a reflector that reflects light emitted from an LED light source to the side.

International Publication No. 2013/069446 Special table 2012-501516 gazette

  The lamp of Patent Document 1 is provided with a radiation fin (heat sink) on the back side of the light emitting unit. However, in the lamp of Patent Document 1, since there is a heat radiation fin in a space surrounded by a plurality of light emitting units where it is difficult for air to flow, heat tends to accumulate in the space, and heat dissipation from the heat radiation fin is not good. In the lamp of Patent Document 1, it is necessary to increase the size of the heat dissipating fins, which increases the weight.

  In the lamp of Patent Document 2, the reflection effect is low due to the positional relationship between the light source and the reflection surface. In the lamp of Patent Document 2, there are both light that is emitted from the LED light source as it is to the outer periphery of the lamp and light that is emitted from the LED light source and reflected by the reflecting surface and emitted to the outer periphery of the lamp. The brightness is high at the position where the light from the LED light source is directly emitted to the outer periphery of the lamp, and the brightness is low at the position where the light emitted from the LED light source and reflected by the reflecting surface is emitted to the outer periphery of the lamp. For this reason, the uneven brightness in the circumferential direction of the lamp is large, and unpleasant glare tends to occur. Moreover, in the lamp of Patent Document 2, a light source is arranged on a frame having a plurality of reflecting surfaces with the light emitting surface facing outward. In the lamp of Patent Document 2, heat is easily trapped in a space surrounded by a frame having a plurality of reflecting surfaces where it is difficult for air to flow, and it is difficult to efficiently dissipate the light source.

  The present invention has been made in order to solve the above-described problems. A lamp that is excellent in heat dissipation of the light source unit, has good energy efficiency, has little uneven brightness in the circumferential direction of the lamp, and is advantageous for increasing the luminous flux. The purpose is to provide.

The lamp according to the present invention has a light emitting element, and has a plurality of light emitting units having an elongated shape having a direction parallel to the lamp central axis as a longitudinal direction, and a plurality of reflecting surfaces facing the outer periphery of the lamp, A plurality of reflecting surfaces surrounding the central axis of the lamp, and the light emitting surfaces of the respective light emitting units are opposed to the respective reflecting surfaces, irradiate light on the reflecting surfaces, and adjacent light emitting units The light reflected by the reflecting surfaces is irradiated between the adjacent light emitting units to the outer periphery of the lamp , and each of the plurality of reflecting surfaces is parallel to the central axis of the lamp. One of a edge, when seen in the direction perpendicular to the lamp central axis, the reflector projects to the outside through between the light emitting units adjacent to each other, is an edge there shall in its projecting portion .

  According to the present invention, a plurality of light emitting units having a shape whose longitudinal direction is parallel or inclined with respect to the lamp central axis, and a reflector in which a plurality of reflecting surfaces facing the lamp outer periphery surround the lamp central axis. The light emitting surface of each light emitting unit is opposed to each reflecting surface, so that the light source part is excellent in heat dissipation, energy efficient, and brightness unevenness in the circumferential direction of the lamp is small and large. It is possible to provide a lamp that is advantageous for luminous flux.

It is a perspective view which shows the lamp | ramp of Embodiment 1 of this invention. It is a disassembled perspective view of the light emission unit with which the lamp | ramp shown in FIG. 1 is provided. It is a perspective view which shows the modification of the translucent cover with which a light emission unit is provided. It is the perspective view which abbreviate | omitted illustration of the front end side support body of the lamp | ramp shown in FIG. It is the figure which abbreviate | omitted illustration of the front end side support body of the lamp | ramp shown in FIG. 1, and was seen from the front end side. It is a perspective view which shows the lamp | ramp of Embodiment 2 of this invention. It is a perspective view which shows the lamp | ramp of Embodiment 3 of this invention. It is a perspective view which shows the lamp | ramp of Embodiment 4 of this invention. It is the perspective view which abbreviate | omitted illustration of the reflector of the lamp | ramp shown in FIG. 8, and a front end side support body. It is a perspective view of the light emission unit with which the lamp | ramp shown in FIG. 8 is provided. It is the figure which abbreviate | omitted illustration of the front end side support body of the lamp | ramp shown in FIG. 8, and was seen from the front end side. It is a perspective view which shows the lamp | ramp of Embodiment 5 of this invention. It is a perspective view which shows the lamp | ramp of Embodiment 6 of this invention. It is a perspective view which shows the lamp | ramp of Embodiment 7 of this invention. It is a perspective view which shows the lamp | ramp of Embodiment 8 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the element which is common in each figure, and the overlapping description is abbreviate | omitted.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing a lamp according to Embodiment 1 of the present invention. A lamp 1A according to the first embodiment shown in FIG. 1 includes a screw-type base 2, a base mounting portion 3, a plurality of light emitting units 4, a reflector 5, a proximal end support 6, and a distal end support. And a body 7. The lamp 1A of the present embodiment can be used as an alternative to a conventional HID (High Intensity Discharged) lamp in indoor and outdoor lighting fixtures (for example, street lamp fixtures, street lamp fixtures, high ceiling fixtures, etc.). In the installed state, the lamp 1A can be used in any direction, such as the base 2 upward or diagonally upward, the base 2 downward or diagonally downward, and the base 2 laterally. In the following description, the base 2 side is referred to as a “base end side”, and the opposite side is referred to as a “tip end side”. In the present embodiment, the virtual straight line corresponding to the central axis of the base 2 corresponds to the “lamp central axis”.

  The base 2 is mounted on the base mounting portion 3. The base mounting portion 3 is preferably composed of a resin material having excellent heat resistance, a resin material having excellent heat dissipation, a metal material, or a combination thereof. The lamp 1 </ b> A of the present embodiment includes three light emitting units 4. Each light emitting unit 4 has the same configuration. Each light emitting unit 4 has a shape whose longitudinal direction is parallel to the lamp central axis. Each light emitting unit 4 is arranged with its light emitting surface (surface from which light is emitted) facing the lamp inner peripheral side. A space is provided between adjacent light emitting units 4. In the present embodiment, these light emitting units 4 are arranged at equal intervals in the circumferential direction of the lamp 1A. These light emitting units 4 are arranged at equal distances from the lamp central axis and at equal angular intervals (120 ° intervals in the illustrated configuration) around the lamp central axis.

  Each light emitting unit 4 has a heat sink 4a. The heat sink 4 a is located on the opposite side of the light emitting surface of the light emitting unit 4. The heat sink 4a faces the lamp outer peripheral side. The heat sink 4a is preferably made of a metal material (for example, aluminum, aluminum-based alloy, stainless steel, etc.).

  The reflector 5 has a plurality of reflecting surfaces 5a. Each reflecting surface 5a faces the lamp outer peripheral side. In the present embodiment, the reflector 5 has three reflecting surfaces 5a. Each reflecting surface 5a has the same configuration. In the present embodiment, these reflecting surfaces 5a are arranged at equal distances from the lamp center axis and at equal angular intervals (120 ° intervals in the configuration shown) around the lamp center axis. The light emitting surface of each light emitting unit 4 faces each reflecting surface 5a. An edge of the reflecting surface 5a parallel to the lamp center axis is close to an edge of the reflecting surface 5a adjacent to the reflecting surface 5a that is parallel to the lamp center axis.

  The reflector 5 in the present embodiment is a unit configured integrally so as to form a plurality of reflecting surfaces 5a. In the present embodiment, since the reflector 5 having the plurality of reflecting surfaces 5a is formed as an integral unit, the number of parts can be reduced and the assembly is facilitated. The material of the reflector 5 is not specifically limited, For example, a metal material, a plastic material, etc. can be used. From the viewpoint of improving the weather resistance, it is desirable that a coating layer such as a resin coat for protecting the surface of the reflector 5 is provided.

  The base mounting portion 3 is fixed to the base end side support 6 on the side opposite to the base 2. The base end side support 6 supports the base end portions of the light emitting unit 4 and the reflector 5. The front end support 7 supports the front ends of the light emitting unit 4 and the reflector 5. Power is supplied to each light emitting unit 4 via a power supply line (not shown) disposed on the base mounting portion 3 and the base end side support 6.

  The base end side support body 6 is a frame-shaped member. The schematic shape of the base end side support 6 is a polygonal shape having sides that linearly connect the base end portions of the adjacent light emitting units 4. The front end side support body 7 is a frame-shaped member. The schematic shape of the distal end support 7 is a polygonal shape having sides that linearly connect the distal ends of the adjacent light emitting units 4. The fixing method between the light emitting unit 4 and the reflector 5 and the base end side support body 6 and the front end side support body 7 is not particularly limited. For example, insertion, sliding, screwing, welding, brazing, adhesion, Any method such as fitting or a method of combining them may be used.

  It is desirable that the heat sink 4a of the light emitting unit 4 and at least one of the base end side support body 6 and the front end side support body 7 be connected so as to be able to conduct heat. Thereby, the temperature of the light emitting unit 4 can be further lowered by transferring the heat of the heat sink 4a to at least one of the base end side support body 6 and the front end side support body 7.

  At least one of the base end side support body 6 and the front end side support body 7 is preferably made of a metal material. By forming at least one of the base end side support body 6 and the front end side support body 7 with a metal material having high thermal conductivity, the heat of the light emitting unit 4 is at least of the base end side support body 6 and the front end side support body 7. It is efficiently transmitted to one side, and heat dissipation from at least one surface of the base end side support body 6 and the front end side support body 7 can be promoted. As a result, the temperature of the light emitting unit 4 can be further lowered.

  It is desirable that at least one of the base end side support body 6 and the front end side support body 7 and the reflector 5 are connected so as to be able to conduct heat. Thereby, the heat transmitted from the light emitting unit 4 to at least one of the base end side support body 6 and the front end side support body 7 can be further transmitted to the reflector 5. As a result, the temperature of the light emitting unit 4 can be further lowered. In this case, by configuring the reflector 5 with a material having a high thermal conductivity (for example, a metal material), heat dissipation from the surface of the reflector 5 can be promoted, and the temperature of the light emitting unit 4 can be further lowered.

  The surface characteristics of the base mounting part 3, the heat sink 4a, the base end side support body 6, the front end side support body 7 and the like are desirably light diffusive and highly reflective. A coating film having light diffusibility and high reflectivity may be formed on these surfaces. Since these surfaces have light diffusibility and high reflectivity, the diffusion of light to the periphery of the lamp 1A can be improved, and a wide light distribution can be achieved.

  FIG. 2 is an exploded perspective view of the light emitting unit 4 included in the lamp 1A shown in FIG. As shown in FIG. 2, the light emitting unit 4 includes an LED light source 4b (light emitting element), a light source substrate 4c, and a translucent cover 4d in addition to the heat sink 4a. The LED light source 4b is mounted on the surface side of the light source substrate 4c. Power is supplied to the LED light source 4b through the light source substrate 4c. In the present embodiment, a plurality of LED light sources 4b are arranged in two rows on the light source substrate 4c. The light source substrate 4c is preferably a substrate using a glass epoxy material substrate such as FR-4 or CEM-3 or a metal substrate such as aluminum.

  The schematic shape of the light emitting unit 4 of the present embodiment viewed from the direction perpendicular to the light source substrate 4c is an elongated rectangle. By increasing the length of the light emitting unit 4 in the longitudinal direction, an amount of the LED light source 4b corresponding to the required light beam can be mounted on the light emitting unit 4. For this reason, the lamp 1A is advantageous for increasing the luminous flux. In the present embodiment, as the LED light source 4b, for example, a 1 W to several W class surface mount type small LED package is used. The light-emitting element in the present invention is not limited to this, for example, a COB (Chip on Board) type LED light source having a large luminous flux of several thousand to several tens of thousands of lm / piece, a bullet type LED, an LED with a light distribution lens Etc. may be used. Note that the COB type LED light source has a configuration in which a plurality of LED bare chips are directly mounted on a heat-radiating substrate such as a metal substrate or a ceramic substrate and resin-sealed. Moreover, in this invention, you may use not only an LED light source but an organic EL light source etc. as a light emitting element, for example.

  The heat sink 4a is disposed on the back side of the light source substrate 4c. The heat sink 4 a includes a plate-like portion that overlaps the back side of the light source substrate 4 c and a plurality of plate-like fins that protrude from the plate-like portion and extend along the longitudinal direction of the light emitting unit 4. The heat sink 4a dissipates heat generated by the LED light source 4b to the air. The heat sink 4a is not limited to the illustrated configuration, and may be configured to have pin fins, for example.

  The translucent cover 4d has translucency and waterproof moisture resistance. The translucent cover 4d covers the entire light source substrate 4c and the LED light source 4b mounted thereon. The constituent material of the translucent cover 4d is desirably a material excellent in moisture resistance, water resistance, light resistance, earthquake resistance, and the like. Or you may provide those characteristics by giving a light-resistant coat or a water-resistant coat etc. to translucent cover 4d. As a specific example of a preferable constituent material of the translucent cover 4d, a polycarbonate material excellent in ease of molding and environmental resistance can be given. The joint between the translucent cover 4d and the heat sink 4a has a waterproof and moisture-proof structure. As such a configuration, for example, a mounting groove (not shown) in which the outer peripheral portion of the translucent cover 4d is fitted is formed in the heat sink 4a, and the periphery of the fitting portion is made of, for example, a silicone-based moisture-proof resin. The structure to coat is mentioned. In the lamp 1A of the present embodiment, the light source 4b and the light source substrate 4c can be reliably protected from the environment by providing the translucent cover 4d and ensuring the waterproof and moistureproof property of the mounting portion. For this reason, since the lamp | ramp 1A whole exhibits the outstanding environmental resistance, it can be preferably used also for the lighting fixture installed outdoors.

  The translucent cover 4d has a convex lens portion on the surface at a position facing each LED light source 4b. The light emitted from the LED light source 4b passes through the convex lens portion of the translucent cover 4d and is emitted from the light emitting unit 4. Compared to the beam angle of light directly emitted from the LED light source 4b, the beam angle of light passing through the convex lens portion of the translucent cover 4d becomes narrower. The convex lens part is an example of a narrow light distribution part having a function of narrowing the beam angle.

  In the present embodiment, an elongated light emitting portion formed by a row of LED light sources 4b arranged in the longitudinal direction of the light emitting unit 4 and a row of convex lens portions facing the light source cover 4d is defined as a first light emitting row 4f. Called. In addition, an elongated light-emitting portion formed by another row of LED light sources 4b arranged along the longitudinal direction of the light-emitting unit 4 and another row of convex lens portions of the translucent cover 4d opposed to the second light-emitting row 4g Called. The first light emission row 4f and the second light emission row 4g are arranged in parallel. In the present embodiment, the light emitting unit 4 includes two light emitting columns (first light emitting column 4f and second light emitting column 4g). However, in the present invention, the light emitting unit 4 may have one light emitting column.

  FIG. 3 is a perspective view showing a modification of the translucent cover provided in the light emitting unit 4. Instead of the translucent cover 4d shown in FIG. 2, the translucent cover 4e shown in FIG. The translucent cover 4e has a Fresnel lens part on the surface at a position facing each LED light source 4b. The Fresnel lens unit is an example of a narrow light distribution unit having a function of narrowing the beam angle. In addition, the narrow light distribution part in this invention is not limited to a convex lens part or a Fresnel lens part. Although not shown, a cylindrical lens portion or a linear Fresnel lens portion extending along the longitudinal direction of the light emitting unit 4 may be used as the narrow light distribution portion. Further, the narrow light distribution unit may be omitted. For example, when a bullet-type LED, an LED with a light distribution lens, or the like is used as the LED light source 4b, a narrow light distribution unit is often unnecessary.

  FIG. 4 is a perspective view of the lamp 1A shown in FIG. FIG. 5 is a view of the lamp 1A shown in FIG. 1 as viewed from the front end side, with the illustration of the front end support 7 omitted. As shown in these drawings, the light emitting surface of each light emitting unit 4 faces each reflecting surface 5a. Each light emitting unit 4 irradiates each reflecting surface 5a with light. Each reflecting surface 5a reflects the light emitted from each light emitting unit 4.

  Most of the light emitted from the light emitting unit 4 is applied to the reflecting surface 5a. Of the light irradiated from the lamp 1A to the outer peripheral side, the proportion of light directly irradiated from the light emitting unit 4 without passing through the reflecting surface 5a is small. Most of the light emitted from the lamp 1A to the outer peripheral side is light reflected by the reflecting surface 5a. According to the lamp 1A, the wide reflective surface 5a appears to emit light, and light from the light emitting unit 4 can be prevented from being directly irradiated to the outside of the lamp 1A, so that unpleasant glare can be reliably suppressed. In addition, the luminance uniformity in the circumferential direction of the lamp 1A can be increased. Furthermore, according to the lamp 1A, by using the light emitting unit 4 having an elongated shape, it is possible to suppress the shadow produced by the light emitting unit 4 with respect to the reflected light from the reflecting surface 5a, and it is possible to suppress uneven luminance during lighting. In recent years, since the miniaturization and high efficiency of LEDs have been remarkably advanced, even a narrow and long light emitting unit 4 can emit light efficiently with a large luminous flux.

  The heat sink 4a of the light emitting unit 4 faces the space outside the lamp 1A. For this reason, air tends to flow around the heat sink 4a by convection or the like, and heat does not accumulate around the heat sink 4a. Therefore, according to the lamp 1A, excellent heat dissipation is obtained, and the LED light source 4b can be lowered in temperature, so that the LED light source 4b can have high luminous efficiency and long life. In particular, regardless of the direction in which the lamp 1A is installed (the base 2 is upward or diagonally upward, the base 2 is downward or diagonally downward, the base 2 is laterally oriented, etc.), excellent heat dissipation can be obtained in any direction. Moreover, the heat sink 4a faces the external space, so that heat radiation by radiation from the heat sink 4a is also promoted. Therefore, heat dissipation is further improved. Further, since the heat dissipation efficiency of the heat sink 4a is high, sufficient heat dissipation performance can be obtained even with a relatively small heat sink 4a. Therefore, since the heat sink 4a can be reduced in weight, the overall weight of the lamp 1A can also be reduced.

  The reflection characteristics of the reflection surface 5a may be specular reflection or diffuse reflection. The reflective surface 5a may be formed by attaching a highly reflective film. A light ray R1 in FIG. 5 is an example of a light ray specularly reflected by the reflection surface 5a. A light ray R2 in FIG. 5 is an example of a light ray diffusely reflected by the reflection surface 5a. When the reflecting surface 5a is a specular reflecting surface or a characteristic close thereto, a light distribution characteristic is obtained in which the change in luminous intensity in the circumferential direction of the lamp 1A is relatively large. When the reflecting surface 5a is a diffuse reflecting surface, the uniformity of the luminance of the reflecting surface 5a during lighting can be further increased, and unpleasant glare can be more reliably suppressed.

  In the present embodiment, since the reflecting surface 5a is a concave surface, the uniformity of the luminance of the reflecting surface 5a at the time of lighting can be increased, the unevenness of luminance can be more reliably suppressed, and the light emitted from the light emitting unit 4 The reflection efficiency can be further improved. Further, in the present embodiment, as shown in FIG. 5, the center line (L1) of the light emitting unit 4 passes through the deepest part of the recess formed by the reflecting surface 5a on a plane perpendicular to the lamp center axis. By comprising in this way, it becomes possible to show said effect more reliably.

  As shown in FIG. 5, in the present embodiment, the center of the light emitting unit 4 is positioned on the normal line (L1) at the center of the reflecting surface 5a in a plane perpendicular to the lamp center axis. By comprising in this way, the uniformity of the brightness | luminance of the reflective surface 5a at the time of lighting can be made higher, and a brightness nonuniformity can be suppressed more reliably. However, the present invention is not limited to such a configuration, and the center position of the light emitting unit 4 with respect to the normal (L1) at the center of the reflecting surface 5a in a plane perpendicular to the lamp center axis. May be biased to either side.

  In the present embodiment, the normal line of the reflecting surface 5a is perpendicular to the lamp central axis in the entire reflecting surface 5a. Thereby, the uniformity of the brightness | luminance of the reflective surface 5a at the time of lighting can be made higher, and a brightness nonuniformity can be suppressed more reliably.

  In FIG. 5, θ1 is a ½ beam angle of light emitted from the first light emitting row 4f of the light emitting unit 4 in a plane perpendicular to the lamp central axis. In FIG. 5, θ2 is a ½ beam angle of light emitted from the second light emitting row 4g of the light emitting unit 4 in a plane perpendicular to the lamp central axis. The 1/2 beam angle is an opening angle of light that becomes a half of the maximum luminous intensity. In the present embodiment, θ1 = θ2. As shown in FIG. 5, in the present embodiment, the reflecting surface 5a covers the range of the ½ beam angle θ1 of the first light emitting row 4f. The reflecting surface 5a covers the range of the ½ beam angle θ2 of the second light emitting row 4g. Thus, in the present invention, it is desirable that the reflection surface 5 a covers the range of the ½ beam angle of each light emitting column of the light emitting unit 4 in a plane perpendicular to the lamp central axis. Thereby, the uniformity of the luminance of the reflecting surface 5a at the time of lighting can be further increased, the luminance unevenness and the glare can be more reliably suppressed, the reflection efficiency of the light emitted from the light emitting unit 4 is further improved, and the luminous efficiency is improved. A high lamp 1A is obtained. For example, the above conditions can be satisfied by adjusting the optical characteristics of the narrow light distribution portion and the shape of the reflecting surface 5a.

  In the present embodiment, the reflecting surface 5a is a continuous concave surface (concave surface). The shape of the reflective surface 5a is not limited to the illustrated shape. The reflective surface 5a may be a flat surface or a convex surface. The reflecting surface may be a surface obtained by combining a plurality of flat surfaces in a concave shape. Further, the reflecting surface 5a may be a surface obtained by combining a plurality of concave surfaces. For example, the first concave surface that mainly reflects the light emitted from the first light emitting row 4f of the light emitting unit 4 and the second concave surface that mainly reflects the light emitted from the second light emitting row 4g are connected to form the reflecting surface 5a. It may be formed.

  The reflective surface 5a may be a fluorescent surface containing a fluorescent material. For example, the reflective surface 5 a may be a fluorescent surface containing a yellow fluorescent material, and a blue LED may be used as the LED light source 4 b of the light emitting unit 4. In this case, the light reflected by the reflecting surface 5a becomes white light obtained by combining blue light and yellow light, and appears white when observed from a position away from the lamp 1A. For example, a layer containing a fluorescent material can be provided on the reflective surface 5a by using a binder such as silicone.

  In the present embodiment, the plurality of light emitting units 4 and the reflecting surface 5a are arranged at an equal distance from the lamp central axis and at equal angular intervals around the lamp central axis. Thereby, the uniformity of the luminance in the circumferential direction of the lamp 1A can be made higher, and the luminance unevenness can be more reliably suppressed.

  In the present embodiment, the light emitting unit 4 is arranged so that the longitudinal direction thereof is parallel to the lamp central axis. The present invention is not limited to such a configuration, and the longitudinal direction of the light emitting unit 4 may be inclined with respect to the lamp central axis. The inclination angle when the longitudinal direction of the light emitting unit 4 is inclined with respect to the lamp central axis is preferably about 30 ° or less, for example. In the present embodiment, the case where the number of the light emitting units 4 and the reflecting surfaces 5a is three has been described. However, in the present invention, the number of the light emitting units 4 and the reflecting surfaces 5a may be two, or four or more. .

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to FIG. 6. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be described with the same reference numerals. Simplify or omit. FIG. 6 is a perspective view showing a lamp according to Embodiment 2 of the present invention. The lamp 1B of the second embodiment shown in FIG. 6 is the same as the lamp 1A of the first embodiment except that the configuration of the reflector 5 is different.

  As shown in FIG. 6, the reflector 5 provided in the lamp 1B of the present embodiment has a hollow portion 5b. The hollow portion 5b is located on the back side of the plurality of reflecting surfaces 5a. The hollow part 5b penetrates the inside of the reflector 5 in the direction of the lamp central axis. The hollow portion 5 b has openings at the distal end surface and the proximal end surface of the reflector 5. In the present embodiment, air can pass from one opening of the hollow portion 5b of the reflector 5 to the other opening. As a result, the heat transmitted from the light emitting unit 4 to the reflector 5 via the base end support 6 and the tip support 7 can be efficiently dissipated from the surface of the reflector 5. As a result, the temperature of the light emitting unit 4 can be further lowered. You may form the fin (illustration omitted) which accelerates | stimulates heat dissipation in the internal peripheral surface of the reflector 5 which the hollow part 5b forms.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described with reference to FIG. 7. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be described with the same reference numerals. Simplify or omit. FIG. 7 is a perspective view showing a lamp according to Embodiment 3 of the present invention. The lamp 1C of the third embodiment shown in FIG. 7 is the same as the lamp 1A of the first embodiment except that the configuration of the reflector 5 is different.

  As shown in FIG. 7, the reflector 5 included in the lamp 1C of the present embodiment is configured by combining a plurality of reflecting members (reflecting plates) 5c. One reflecting surface 5a is formed on one reflecting member 5c. Each reflecting member 5 c is fixed to the base end side support body 6 and the front end side support body 7. Adjacent reflection members 5c may be fixed or may not be fixed. In the present embodiment, the reflector 5 can be configured by combining a plurality of relatively simple reflecting members 5c. Thereby, manufacture of components becomes easy and component costs can be reduced.

  Moreover, in the reflector 5 in this Embodiment, the space enclosed by the some reflection member 5c becomes the hollow part 5b. The effect similar to Embodiment 2 is acquired because the reflector 5 is equipped with the hollow part 5b.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described with reference to FIG. 8 to FIG. 11. The difference from the above-described embodiment will be mainly described, and the same parts or corresponding parts will be denoted by the same reference numerals. The description will be simplified or omitted. FIG. 8 is a perspective view showing a lamp according to Embodiment 4 of the present invention. A lamp 1D of the fourth embodiment shown in FIG. 8 is the same as the lamp 1A of the first embodiment except that the configuration of the light emitting unit 4 is different.

  FIG. 9 is a perspective view of the lamp 1D according to the fourth embodiment shown in FIG. FIG. 10 is a perspective view of the light emitting unit 4 provided in the lamp 1D of the fourth embodiment shown in FIG. As shown in FIG. 10, in the light emitting unit 4 in the present embodiment, the light source substrate 4c and the translucent cover 4d that form the first light emitting column 4f, and the light source substrate 4c and the translucent light that form the second light emitting column 4g. The sex cover 4d is a separate body. A plurality of LED light sources 4b are arranged in one row along the longitudinal direction of the light emitting unit 4 on each light source substrate 4c. Each translucent cover 4 d has a plurality of convex lens portions formed in a line along the longitudinal direction of the light emitting unit 4. Each convex lens portion is formed on the surface at a position facing each LED light source 4b.

  The heat sink 4a includes a first attachment surface 4h for attaching the light source substrate 4c and the translucent cover 4d of the first light emission row 4f, and a second attachment surface 4i for attaching the light source substrate 4c and the translucent cover 4d of the second light emission row 4g. With. The angle between the first mounting surface 4h and the second mounting surface 4i is an angle greater than 90 ° and smaller than 180 °. The first mounting surface 4h and the second mounting surface 4i form a mountain-shaped slope.

  FIG. 11 is a view seen from the front end side, with the illustration of the front end support 7 of the lamp 1D of the fourth embodiment shown in FIG. 8 omitted. In FIG. 11, θ1 is a ½ beam angle of the light emitted from the first light emitting row 4f of the light emitting unit 4 in a plane perpendicular to the lamp central axis. In FIG. 11, θ2 is a ½ beam angle of light emitted from the second light emitting row 4g of the light emitting unit 4 in a plane perpendicular to the lamp central axis. The light emitted from the first light emitting row 4f has the maximum luminous intensity in the direction W1 in FIG. The light emitted from the second light emitting row 4g has the maximum luminous intensity in the direction W2 in FIG. In the plane perpendicular to the lamp central axis, the luminous intensity distribution of the light emitted from the light emitting unit 4 has peaks in two directions, the direction W1 and the direction W2. The range of the ½ beam angle θ1 of the first light emitting row 4f substantially covers a half region of the reflecting surface 5a virtually divided into two by a straight line parallel to the lamp central axis. The range of the ½ beam angle θ2 of the second light emitting row 4g substantially covers the other half of the reflecting surface 5a, which is virtually divided into two equal parts by a straight line parallel to the lamp central axis.

  In the present embodiment, the luminous intensity distribution of the light emitted from the light emitting unit 4 has two peaks in a plane perpendicular to the lamp central axis, so that reflected light is emitted more efficiently to the outer periphery of the lamp 1D. be able to. That is, the first light emitting column 4f mainly emits light to the half region of the reflecting surface 5a virtually divided into two, and the second light emitting column 4g is mainly applied to the other half region of the reflecting surface 5a. By irradiating light, it is possible to emit reflected light using the entire reflecting surface 5a more efficiently. In the present invention, the luminous intensity distribution of the light emitted from the light emitting unit 4 may have three or more peaks on a plane perpendicular to the lamp central axis.

Embodiment 5. FIG.
Next, a fifth embodiment of the present invention will be described with reference to FIG. 12. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be described with the same reference numerals. Simplify or omit. FIG. 12 is a perspective view showing a lamp according to Embodiment 5 of the present invention. A lamp 1E according to the fifth embodiment shown in FIG. 12 is the same as the lamp 1A according to the first embodiment except that the tip light emitting unit 9 is further provided.

  The tip light emitting section 9 provided in the lamp 1E of the present embodiment is installed on the tip side support 7. The tip light emitting section 9 is arranged with the light emitting surface facing the lamp tip side. The tip light emitting unit 9 includes an LED light source 9a (light emitting element), a light source substrate 9b, and a translucent cover 9c. The LED light source 9a is mounted on the surface side of the light source substrate 9b. Power is supplied to the LED light source 9a through the light source substrate 9b. In the present embodiment, a plurality of 1 W to several W class surface mount type small LED packages are used as the LED light source 9a, but other types of LEDs may be used. Moreover, in this invention, you may use light emitting elements (for example, organic EL light source) other than LED.

  The translucent cover 9c has translucency and waterproof moisture resistance. The translucent cover 9c is formed so as to cover the entire light source substrate 9b. The translucent cover 9c is configured to collectively cover all the LED light sources 9a of the tip light emitting unit 9. A preferable constituent material of the translucent cover 9c is the same as that of the translucent cover 4d. The mounting portion of the translucent cover 9c is configured to have waterproof and moistureproof properties in the same manner as the translucent cover 4d.

  The heat generated by the LED light source 9a is thermally conducted to the distal end support 7 through the light source substrate 9b and further conducted to the reflector 5. Thereby, the LED light source 9a can be made low temperature, and high efficiency and long life of the LED light source 9a can be achieved. The tip light emitting unit 9 may further include a heat sink (not shown). Moreover, you may provide in the front end side support body 7 the fin which dissipates the heat | fever transmitted from LED light source 9a to air. In the illustrated configuration, the schematic shape of the tip light emitting portion 9 when viewed from the lamp tip side is a circle, but may be another shape such as a regular polygon.

  The power supply path to the tip light emitting unit 9 preferably passes through at least one light emitting unit 4. By connecting at least one light emitting unit 4 and the tip light emitting unit 9 via a power supply line (not shown), power can be supplied to the tip light emitting unit 9 via the light emitting unit 4. Although not shown, a conductive pattern for supplying power to the LED light source 4b of the light source substrate 4c and a conductive pattern for supplying power to the tip light emitting unit 9 are separately provided on the light source substrate 4c of at least one light emitting unit 4. The latter conductive pattern may be electrically connected to the light source substrate 9b by the power supply line. By doing in this way, since the electric power feeding path | route which supplies electric power to the light emission unit 4 and the electric power feeding path | route which supplies electric power to the front-end | tip light-emitting part 9 can be electrically independent, the LED light source 4b of the light-emitting unit 4 and the front-end | tip light-emitting part 9 With the LED light source 4b, it becomes possible to individually control the driving conditions such as current and voltage and the lighting state.

  According to the present embodiment, in addition to the same effects as in the first embodiment, the following effects can be obtained. By providing the tip light emitting part 9, not only the lamp outer peripheral direction but also the lamp tip direction can be sufficiently illuminated. That is, omnidirectional light distribution is possible.

Embodiment 6 FIG.
Next, a sixth embodiment of the present invention will be described with reference to FIG. 13. The description will focus on the differences from the first embodiment described above, and the same or corresponding parts will be denoted by the same reference numerals. Are simplified or omitted. FIG. 13 is a perspective view showing a lamp according to Embodiment 6 of the present invention.

  A lamp 1F according to the sixth embodiment shown in FIG. 13 is the same as the lamp 1A according to the first embodiment except that the lamp 1F further includes a translucent cover 10 that covers the outer periphery of the reflector 5. The translucent cover 10 is a plate-like member made of a translucent material. The translucent cover 10 is installed between two adjacent light emitting units 4. The lamp 1 </ b> F of the present embodiment includes the same number of translucent covers 10 as the number of light emitting units 4. The translucent cover 10 of the present embodiment is curved so as to exhibit a cylindrical surface centered on the lamp central axis. Since the cylindrical outer shape is formed by the plurality of translucent covers 10, the design can be improved. The outer shape formed by the plurality of translucent covers 10 is not limited to such a cylindrical shape, and may be, for example, a polygonal column shape.

  The light emitting surface of the light emitting unit 4 faces the inner space surrounded by the translucent cover 10. The light emitted from the light emitting unit 4 to the reflecting surface 5a and reflected by the reflecting surface 5a is transmitted through the translucent cover 10 and emitted to the outer peripheral side of the lamp 1F. By providing the translucent cover 10, it is possible to prevent dirt from adhering to the light emitting surface of the light emitting unit 4 and the reflecting surface 5 a of the reflector 5. The heat sink 4 a of the light emitting unit 4 faces the space outside the translucent cover 10. For this reason, since the convection of the air in the heat sink 4a, etc. are not prevented by the translucent cover 10, heat dissipation can be made favorable and the light emission unit 4 can be made low temperature.

  The translucent cover 10 desirably has a function of diffusing light. Although not shown in the drawings, the inner surface or the outer surface of the translucent cover 10 is provided with a fine structure for diffusing light (for example, a fine prism-like pattern or a fine triangular prism-like stripe pattern). Can be imparted to the translucent cover 10. Alternatively, the translucent cover 10 may be simply a milky white translucent diffusion cover. Since the translucent cover 10 has a function of diffusing light, the luminance unevenness can be further reduced.

Embodiment 7 FIG.
Next, a seventh embodiment of the present invention will be described with reference to FIG. 14. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be described with the same reference numerals. Simplify or omit. FIG. 14 is a perspective view showing a lamp according to Embodiment 7 of the present invention.

  The lamp 1G according to the seventh embodiment shown in FIG. 14 is the same as the lamp 1A according to the first embodiment, except that the tip light emitting section 9 and a translucent cover 10 that covers the outer periphery of the reflector 5 are further provided. is there. The tip light emitting section 9 in the present embodiment is the same as that described in the fifth embodiment. The translucent cover 10 in the present embodiment is the same as that described in the sixth embodiment. According to the seventh embodiment, in addition to the same effects as those of the first embodiment, the effects described in the fifth embodiment and the effects described in the sixth embodiment can be obtained.

Embodiment 8 FIG.
Next, an eighth embodiment of the present invention will be described with reference to FIG. 15. The description will focus on the differences from the above-described embodiment, and the same or corresponding parts will be described with the same reference numerals. Simplify or omit. FIG. 15 is a perspective view showing a lamp according to Embodiment 8 of the present invention.

  A lamp 1H according to the eighth embodiment shown in FIG. 15 is the same as the lamp 1A according to the first embodiment except that the lamp 1H further includes a tip light emitting portion 9 and a translucent cover 10 that covers the outer periphery of the reflector 5. is there. The translucent cover 10 in the present embodiment is the same as that described in the sixth embodiment. The tip light emitting portion 9 in the present embodiment is the same as the tip light emitting portion 9 in the fifth embodiment except that a light transmissive cover 9d is provided instead of the light transmissive cover 9c.

  The translucent cover 9d of the tip light emitting unit 9 in the present embodiment has a size that covers almost the entire tip surface of the lamp 1H. The outer edge portion of the translucent cover 9 d is joined to the edge of the tip of the translucent cover 10. According to the eighth embodiment, by providing the translucent cover 9d, it is possible to prevent dust from entering the space surrounded by the translucent cover 10 from the front end surface of the lamp 1H. For this reason, it can further suppress that a stain | pollution | contamination adheres to the light emission surface of the light emission unit 4, and the reflective surface 5a of the reflector 5 compared with Embodiment 6. FIG. Further, according to the eighth embodiment, the same effects as those of the first embodiment and the effects described in the sixth embodiment can be obtained.

  As mentioned above, although embodiment of this invention was described, in this invention, it is possible to implement combining the characteristic of several embodiment mentioned above arbitrarily.

1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H lamp, 2 base, 3 base mounting part, 4 light emitting unit, 4a heat sink, 4b LED light source, 4c light source substrate, 4d, 4e translucent cover, 4f first 1 light emitting row, 4g second light emitting row, 4h first mounting surface, 4i second mounting surface, 5 reflector, 5a reflecting surface, 5b hollow portion, 5c reflecting member, 6 base end side support body, 7 distal end side support body 9 Light emitting part, 9a LED light source, 9b Light source substrate, 9c, 9d Translucent cover, 10 Translucent cover

Claims (10)

A plurality of light emitting units each having a light emitting element and exhibiting an elongated shape having a longitudinal direction parallel to the lamp central axis;
A reflector having a plurality of reflecting surfaces facing the lamp outer peripheral side, wherein the plurality of reflecting surfaces surround the lamp central axis;
With
The light emitting surface of each of the light emitting units faces each of the reflecting surfaces, irradiates light to the reflecting surface
A space is provided between the adjacent light emitting units,
The light reflected by the reflecting surface is irradiated between the adjacent light emitting units to the lamp outer peripheral side ,
Each of the plurality of reflecting surfaces has two edges parallel to the lamp central axis,
When seen in the direction perpendicular to the lamp central axis, the reflector projects to the outside through between the light emitting units adjacent to each other, the edge there Ru on the projecting portion lamps. Before SL emitting unit, a lamp according to claim 1, further comprising an elongated light emitting unit having a plurality of light emitting elements arranged along a longitudinal direction of the light emitting unit. Throughout the previous SL reflecting surface, the lamp according to claim 1 or claim 2 is a vertical normal of the reflective surface with respect to the lamp center axis. A translucent cover covering the outer periphery of the reflector,
The translucent cover is installed between the light emitting units adjacent to each other,
The light emitting unit includes a heat sink provided on the opposite side of the light emitting surface,
The heat sink includes fins facing a space outside the translucent cover,
The said translucent cover is a lamp | ramp as described in any one of Claims 1-3 installed between the said heat sinks provided with the said fin.   The lamp according to any one of claims 1 to 3, wherein the light emitting unit includes a heat sink located on the opposite side of the light emitting surface.   The lamp according to any one of claims 1 to 5, wherein the reflecting surface is a concave surface. The reflective surface forms a recess;
The lamp according to any one of claims 1 to 6, wherein a center line of the light emitting unit passes through a deepest portion of the recess in a plane perpendicular to the lamp central axis.   The lamp according to any one of claims 1 to 7, wherein a luminous intensity distribution of light emitted from each of the light emitting units has a plurality of peaks in a plane perpendicular to the lamp central axis.   The lamp according to any one of claims 1 to 8, wherein the plurality of reflecting surfaces and the plurality of light emitting units are arranged at equiangular intervals around the lamp central axis.   The lamp according to any one of claims 1 to 9, further comprising a tip light-emitting portion that has a light-emitting element and is arranged with a light-emitting surface facing the lamp tip side.

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