JP2015109257A - Lighting appliance and its assembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the positioning accuracy of an inner lens with respect to a light source, and to improve the accuracy of light distribution control, in the inner lens and a lighting appliance comprising the inner lens.SOLUTION: A lighting appliance 10 comprises: a base board 40; a semiconductor light source 60 arranged on the base board with an optical axis set upwardly; an inner lens 20 having an incident face, an internal face reflection face which reflects light incident from the incident face to a substantially-horizontal direction, and an emission face which emits the light reflected at an internal face; and a substantially-cylindrical outer lens which disperses the light emitted from the emission face to an up-and-down direction. The inner lens 20 has a positioning member 28 which fixes the inner lens to the base board so that the incident face is located on an optical axis of the semiconductor light source.

Description

  The present invention relates to a lamp provided with an inner lens and an outer lens, and an assembling method thereof.

  Ships are usually equipped with ship lights to ensure safety when navigating at night. While such ship lights are placed in harsh environments such as being exposed to seawater, wind and rain, and direct sunlight, high reliability is required to realize safe navigation. For this reason, for example, ship lights using LEDs (Light Emitting Diodes) that are more reliable than light sources such as incandescent lamps have been proposed.

  This shiplight needs to meet regulations such as the Maritime Collision Prevention Law. This marine collision prevention method stipulates that an illuminance of a predetermined value or more must be realized over a predetermined range in the axial direction, or that an illuminance of a predetermined value or more must be realized over a predetermined angle in the circumferential direction. Yes.

  Patent Document 1 discloses a boat lamp that can emit light with a uniform and high illuminance radially outwardly about a certain central axis. This shiplight has a light emitting element arranged so that a light emitting part is positioned on a central axis, a main reflector having a reflecting surface for reflecting light emitted from the light emitting element, and a light emitted from the light emitting element sandwiching the central axis And a sub-reflector that reflects to the lens portion on the opposite side.

JP 2012-216334 A

  In the structure of the shiplight described in Patent Document 1, a substrate on which a light emitting element is mounted, a main reflector, and a sub reflector are separately attached to members such as an outer cover. For this reason, the positioning accuracy of the main reflector and the sub reflector with respect to the optical axis of the light emitting element is low, and the illuminance or irradiation range as designed may not be obtained.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a technique for improving the accuracy of light distribution control by increasing the positioning accuracy of the inner lens with respect to the light source in a lamp including an inner lens and an outer lens. There is to do.

  An aspect of the present invention includes a substrate, a semiconductor light source disposed on the substrate with the optical axis facing upward, an incident surface, an inner surface reflecting surface that reflects light incident from the incident surface in a substantially horizontal direction, and inner surface reflection. An inner lens having an exit surface that emits the emitted light, and a substantially cylindrical outer lens that diffuses light emitted from the exit surface in the vertical direction, the inner lens being a semiconductor light source A positioning member is provided for fixing the inner lens on the substrate so that the incident surface is positioned on the optical axis.

  According to this aspect, since the substrate on which the semiconductor light source is arranged and the inner lens are directly fixed via the positioning member, the positioning accuracy between the optical axis of the semiconductor light source and the incident surface of the inner lens is high, and light distribution control is performed. Accuracy can be improved.

  An electronic component for driving the semiconductor light source may be disposed on the surface of the substrate opposite to the side on which the semiconductor light source is disposed. According to this, since the semiconductor light source and the electronic component are mounted on the same substrate, the lamp can be reduced in size.

  The exit surface is substantially semicircular or substantially arc-shaped in a cross section in a plane with the optical axis as a normal line, and the inner reflection surface is configured to reflect the light incident from the entrance surface within the range of the exit surface. Also good. By emitting most of the light incident from the incident surface in this way from the output surface, the illuminance within a predetermined range can be increased as compared with the case where light is emitted from the entire circumference of the inner lens. Such a structure is advantageous particularly in a lantern.

  A base member to which the outer lens and the inner lens are attached may further be provided, and the inner lens may have a second positioning member that fixes the inner lens at a predetermined position on the base member. According to this, the substrate and the base member are not directly fixed, but are fixed via the inner lens. Therefore, unlike the structure in which the inner lens and the substrate are separately fixed to the base member, the positioning accuracy between the inner lens and the semiconductor light source on the substrate is not impaired when the base member is attached.

  The lamp includes a first optical unit and a second optical unit, and the first optical unit includes a first semiconductor light source and a first inner lens into which light emitted from the first semiconductor light source is incident. The second optical unit includes a second semiconductor light source and a second inner lens that receives light emitted from the second semiconductor light source and emits light having a color different from that of the first inner lens. The optical unit and the second optical unit may be disposed adjacent to each other. According to this, it is possible to realize a small two-color lamp in which the first optical unit and the second optical unit are incorporated in one shiplight. Note that “emitting different colors of light” means that the first semiconductor light source and the second semiconductor light source themselves emit different colors of light, and that the colors of the first inner lens and the second inner lens are different, This includes both cases where the color of the emitted light is different.

  A shade that borders the first optical unit and the second optical unit may be disposed in the outer lens. This prevents the light from the first optical unit and the light from the second optical unit from being mixed.

  Another aspect of the present invention is a method for assembling a lamp. This method includes an inner surface having an incident surface, an inner surface reflecting surface that reflects light incident from the incident surface in a substantially horizontal direction, an emitting surface that emits light reflected from the inner surface, and first and second positioning members. A lens, a substrate on which a semiconductor light source is arranged, and a base member are prepared, and the inner lens is fixed to the substrate using the first positioning member so that the incident surface is positioned on the optical axis of the semiconductor light source. And fixing the inner lens and the substrate to the base member using the second positioning member.

  ADVANTAGE OF THE INVENTION According to this invention, in the lamp provided with an inner lens and an outer lens, the positioning precision of the inner lens with respect to a light source can be improved, and the precision of light distribution control can be improved.

It is a front perspective view of the boat lamp which concerns on Embodiment 1 of this invention. It is a perspective view of the state which removed the upper shade, the outer lens, and the lower shade from the shiplight. It is an upper perspective view of an inner lens. It is a downward perspective view of an inner lens. It is a ray-trajectory figure in an inner lens and an outer lens. It is a front perspective view of the boat lamp which concerns on Embodiment 2 of this invention. It is a perspective view of the state which removed the shade and the outer lens from the shiplight. It is a front view of the state which assembled | attached the inner lens and the board | substrate. It is an upper perspective view of a single inner lens. It is a downward perspective view in the state where an inner lens, a substrate, and a base member were assembled. It is a ray-trajectory figure in an inner lens and an outer lens. It is a front perspective view of the boat lamp which concerns on Embodiment 3 of this invention. FIG. 13 is a front view of the boat lamp with the outer shade and the outer lens removed from FIG. 12. FIG. 14 is a front view of the boat lamp with the inner shade removed from FIG. 13. FIG. 14 is a perspective view showing the inner structure of the assembly shown in FIG. 13 through the inner shade so that the internal structure can be seen. FIG. 14 is a top view of the assembly shown in FIG. 13. (A) is the top view which permeate | transmitted the inner shade of FIG. 16, and was able to understand an internal structure, (b) is the top view which simplified the inner shade.

(Embodiment 1)
FIG. 1 is a front perspective view of a boat lamp 10 according to Embodiment 1 of the present invention. The ship lamp 10 is a lamp attached to the ship in order to realize safe voyage. The boat lamp 10 is mainly used as a white lamp that irradiates light in the entire circumferential direction, but may be used as a bicolor lamp, a dark lamp, a mast lamp, and a stern lamp (stan light).

  The shiplight 10 includes an outer lens 12, an upper shade 11, and a lower shade 14. The outer lens 12 is a substantially cylindrical lens, and the shades 14 and 16 are for blocking the light from the outer lens 12 and limiting the emission range of the boat lamp 10.

  The outer lens 12 is configured to diffuse light emitted from an emission surface of an inner lens 20 described later in the vertical direction of the shiplight 10. The outer lens 12 is formed of a colorless and transparent resin, but may be a colored and transparent resin or may be formed of a material other than a resin such as glass. In FIG. 1, internal parts observed through the outer lens 12 are omitted for simplicity.

  The upper shade 11 is a disk-shaped member that covers the upper surface of the outer lens 12 and prevents upward light leakage. The lower shade 14 is a cylindrical member having a flange that covers a lower portion of the outer lens 12 and a base member described later.

  FIG. 2 is an upper perspective view of the boat lamp 10 with the upper shade 11, the outer lens 12, and the lower shade 14 removed. Inside the outer lens 12, an assembly mainly composed of the inner lens 20, the substrate 40, and the base member 50 is accommodated. In FIG. 2, in order to make it easy to understand the assembled state between the components, the structure behind the inner lens 20 is shown so as to be visible.

  At the center of the disk-shaped substrate 40, a semiconductor light source 60, for example, an LED (Light Emitting Diode) is disposed with the optical axis facing upward. When the shiplight 10 is used as a white light, the semiconductor light source 60 is a white LED. The semiconductor light source is not limited to white, and may be another color.

  Although not shown, an electronic component for driving the semiconductor light source 60 is mounted on the surface of the substrate 40 opposite to the surface on which the semiconductor light source is disposed. The electronic component may be mounted on the base member 50, for example, instead of being mounted on the substrate.

  The inner lens 20 is a substantially disc-shaped transparent resin lens configured to emit light incident from the semiconductor light source 60 to the entire circumference in the radial direction. The inner lens 20 is positioned and fixed with respect to the substrate 40 so that the optical axis of the semiconductor light source 60 and the central axis of the inner lens 20 coincide. This positioning method will be described later.

  The base member 50 is a member to which the inner lens 20, the substrate 40, the outer lens 12, and the lower shade 14 are attached and for fixing the assembled shiplight 10 to the hull.

  3 is an upper perspective view of the inner lens 20, and FIG. 4 is a lower perspective view of the inner lens 20.

  On the lower surface of the inner lens 20, an incident surface 22 for receiving the light emitted from the semiconductor light source 60 inside the lens is provided. The incident surface 22 is a substantially hemispherical concave surface, and is set so that the center thereof is located on the optical axis of the semiconductor light source 60.

  A funnel-shaped inner reflection surface 24 is formed on the upper surface of the inner lens 20. The inner reflection surface 24 has a role of reflecting upward light incident from the incident surface 22 in a substantially horizontal direction and directing it toward the emission surface 26. For example, the inner reflection surface 24 has a shape in which a parabola whose focal point is located on the optical axis of the semiconductor light source is rotated 360 degrees around the optical axis.

  The emission surface 26 is formed as a cylindrical surface having a diameter slightly smaller from the bottom to the top, and emits the light reflected by the inner reflection surface 24 toward the outer lens 12 positioned on the outer periphery of the inner lens 20.

  On the lower surface of the inner lens 20, a first positioning member 28 for positioning the inner lens 20 at a predetermined position with respect to the substrate 40 and a second positioning member 28 for positioning the inner lens 20 at a predetermined position with respect to the base member 50. A positioning member 30 is provided. The second positioning member 30 extends longer than the first positioning member 28. A fixing member 32 for fixing the inner lens 20 to the substrate 40 and a support member 34 for supporting the inner lens 20 on the substrate 40 are also provided on the lower surface of the inner lens 20.

  The first positioning member 28, the second positioning member 30, the fixing member 32, and the support member 34 are provided on the lower surface of the inner lens 20 so as to be symmetrical twice. Three or more members may be provided.

  With reference to FIG. 2, positioning holes 44 are formed in the substrate 40. By inserting the first positioning member 28 of the inner lens 20 into the hole 44, the inner lens 20 is positioned so that the incident surface 22 is positioned on the optical axis of the semiconductor light source 60. At this time, the lower surfaces of the fixing member 32 and the support member 34 are in contact with the surface of the substrate 40, and a predetermined distance is maintained between the substrate 40 and the incident surface 22 of the inner lens 20. After inserting the first positioning member 28, the inner lens 20 is fixed to the substrate 40 by inserting the pins 46 from the back side of the substrate 40 into the boss holes 32 a formed in the fixing member 32.

  Two U-shaped notches 42 are formed on the opposite sides of the periphery of the substrate 40. When the inner lens 20 and the substrate 40 are assembled, the second positioning member 30 of the inner lens 20 can extend below the substrate 40 through the notch 42.

  The base member 50 is provided with two horseshoe-shaped receiving parts 52 facing outward in the radial direction and two pin holes (not shown) for inserting pins on opposite sides. The inner lens 20 is positioned with respect to the base member 50 by aligning the second positioning member 30 extending beyond the lower surface of the substrate 40 with the receiving portion 52. Thereafter, the inner lens 20 is fixed to the base member 50 by inserting the pins 54 into the boss holes 30 a formed in the second positioning member 30 from the back side of the base member 50.

  As described above, the substrate 40 on which the semiconductor light source 60 is disposed is fixed via the first positioning member 28 of the inner lens 20, and the base member 50 is interposed via the second positioning member 30 of the inner lens 20. Fixed. That is, the substrate 40 and the base member 50 are not directly coupled, but are coupled only via the inner lens 20. Thus, unlike the structure in which the inner lens and the substrate are separately fixed to the base member, the positioning accuracy between the inner lens and the semiconductor light source on the substrate is not impaired when the base member is attached. Further, the positioning accuracy with the outer lens attached to the base member is also improved. Therefore, the accuracy of the light distribution control of the shiplight 10 can be increased.

  FIG. 5 is a diagram illustrating light ray trajectories in the inner lens 20 and the outer lens 12 of the boat lamp 10.

  The light emitted from the semiconductor light source 60 is incident on the incident surface 22 on the lower surface of the inner lens 20. A part of the incident light is reflected outwardly in the radial direction of the inner lens 20 by the funnel-shaped inner surface reflection surface 24 and reaches the exit surface 26, and a part of the incident light does not go through the inner surface reflection surface. Directly reaches the exit surface 26. Since the inner lens 20 is positioned with respect to the substrate 40 so that the center 24a of the inner lens 20 is on the optical axis of the semiconductor light source 60, light is emitted with substantially equal illuminance from the entire circumference of the emission surface 26 of the inner lens 20. Can be irradiated.

  While the inner surface of the outer lens 12 is a smooth curved surface, a cylindrical surface provided with a step that curves in a waveform is formed on the outer surface, and light from the exit surface is diffused in the vertical direction by each step. . Thereby, the light distribution which clears the irradiation range of the white lamp of the vertical range 50 degree | times prescribed | regulated by the maritime collision prevention method is realizable.

  As shown in FIG. 1, since the upper side of the outer lens 12 is covered with the upper shade, the light emitted from the inner reflective surface does not leak out.

  Hereinafter, the assembly procedure of the boat lamp 10 according to the first embodiment will be described. First, the first positioning member 28 of the inner lens 20 is inserted into the mounting hole 44 formed in the substrate 40 on which the semiconductor light source 60 is disposed. A pin 46 is inserted into the boss hole 32 a of the fixing member 32 from the back side of the substrate 40 to fix the inner lens 20 to the substrate 40. In a state where the inner lens 20 and the substrate 40 are assembled, the second positioning member 30 of the inner lens is inserted into the receiving portion 52 of the base member 50. The pin 54 is inserted into the boss hole 30 a of the second positioning member 30 from the back side of the base member 50, and the inner lens 20 is fixed to the base member 50. Further, the outer lens 12 is attached to the base member 50, the upper shade 11 is attached to the outer lens 12, and finally the lower shade 14 is attached to the base member 50. If water enters the interior of the shiplight 10, it causes rusting of metal parts. Therefore, the outer lens 12, the lower shade 14, and the base member 50 are fixed by ultrasonic welding to prevent water from entering the interior. It is preferable.

  As described above, according to the first embodiment, after the inner lens and the substrate are assembled, the inner lens is attached to the base member, so that the inner lens and the semiconductor on the substrate are attached when the base member is attached. The positioning accuracy with respect to the light source is not impaired, and the accuracy of the light distribution control of the lamp is improved.

(Embodiment 2)
In addition to white light, ships are required to install a green right light and a red left light in accordance with the Maritime Collision Prevention Law.

  When an LED is used as the light source, the luminous flux of the white LED is about 100 lumens, whereas the luminous flux of the green LED and the red LED is about half that. For this reason, if the white light optical system is used as it is and the white LED is simply replaced with a green LED or a red LED, a central luminous intensity of 4.3 candela or more stipulated in the Marine Collision Prevention Law can be secured. There is a problem that you can not.

  Therefore, Embodiment 2 provides a lamp having an optical system that clears the central luminous intensity defined by the Marine Collision Prevention Law even when a green LED or a red LED is used as a light source.

  FIG. 6 is a front perspective view of the boat lamp 100 according to Embodiment 2 of the present invention. The boat lamp 100 is mainly used as a right side lamp or a left side lamp, but may be used for other purposes.

  The shiplight 100 includes an outer lens 112 and a shade 116. The outer lens 112 is a substantially cylindrical lens, and the shade 116 is for blocking the light from the outer lens 112 and limiting the emission range of the shiplight 100.

  The outer lens 112 is configured to diffuse light emitted from an emission surface of an inner lens 120 described later in the vertical direction of the shiplight 100. The outer lens 112 is formed of a colorless and transparent resin, but may be a colored and transparent resin or may be formed of a material other than a resin such as glass. In FIG. 6, the internal components observed through the outer lens 112 are omitted for simplicity.

  The shade 116 includes an opening 116a, light shielding plates 116b provided on both sides of the opening, and an upper base 116c. In the maritime collision prevention method, the emission range of the lantern is defined as 112.5 degrees, so the width of the opening 116a is set accordingly. The upper base 116c covers the upper surface of the outer lens 12, and prevents light from leaking upward.

  FIG. 7 is a top perspective view of the boat lamp 100 with the shade 116 and the outer lens 112 removed. Inside the outer lens 112, an assembly mainly including the inner lens 120, the substrate 140, and the base member 150 is accommodated.

  At the center of the disk-shaped substrate 140, a semiconductor light source 160, which is an LED (Light Emitting Diode), for example, is disposed with the optical axis facing upward. The semiconductor light source 160 is a green LED when the shiplight 100 is used as a left side lamp, and a red LED when it is used as a right side lamp.

  Although not shown, an electronic component for driving the semiconductor light source 160 is mounted on the surface of the substrate 140 opposite to the surface on which the semiconductor light source is disposed. The electronic component may be mounted on the base member 150, for example, instead of being mounted on the substrate.

  The inner lens 120 includes a transparent resin lens portion 121 configured to emit light incident from the semiconductor light source 160 in a part of a radial direction, for example, in a range of 180 degrees, and extends from the lens portion 121 to the opposite sides. And a flange portion 129 to be taken out.

  The base member 150 is a member to which the inner lens 120, the substrate 140, the outer lens 112, and the shade 116 are attached and for fixing the assembled shiplight 100 to the hull.

  FIG. 8 is a front view of the inner lens 120 and the substrate 140 assembled together, and FIG. 9 is an upper perspective view of the inner lens 120.

  On the lower surface of the inner lens 120, an incident surface 122 for receiving the light emitted from the semiconductor light source 160 inside the lens is provided. The incident surface 122 is a surface having a substantially concave cross section surrounded by an annular protrusion 122b around the convex portion 122a swelled downward (see FIG. 11), and its center is on the optical axis of the semiconductor light source 160. It is installed so that it may be located.

  An internal reflection surface 124 is provided above the incident surface 122. The portions 124a and 124b of the inner surface reflecting surface 124 are convex surfaces having a shape including a central axis cut by cutting a cone in half, and a horizontal stepped portion 124e is formed between the portions 124a and 124b. Further, the portions 124c and 124d of the inner reflective surface 124 are concave surfaces having a shape obtained by cutting a cone in half on a plane including the central axis, and a horizontal stepped portion 124f is formed between the portions 124c and 124d. . The inner reflection surface 124 has a role of reflecting upward light incident from the incident surface 122 in a substantially horizontal direction and directing substantially all of the incident light to the emission surface 126.

  The exit surface 126 is a cylindrical surface whose diameter slightly decreases from the bottom to the top, and extends in a range of 180 degrees with respect to the central axis of the inner lens 120. In other words, the emission surface 126 has a semicircular shape in a cross section that is a plane having a normal line to the optical axis of the semiconductor light source 160 or the central axis of the inner lens 120. The emission surface 126 emits the light reflected by the inner reflection surface 124 toward the outer lens 112 positioned on the outer periphery of the inner lens 120. In addition, the angle with respect to the center axis | shaft of the output surface 126 may be less than 180 degree | times, and may be 180 degree | times or more. In this case, the exit surface 126 has an arc shape in a cross section that is a plane having a normal to the optical axis of the semiconductor light source or the central axis of the inner lens.

  On the lower surface of the inner lens 120, a first positioning member 128 for positioning the inner lens 120 at a predetermined position with respect to the substrate 140, and a second position for positioning the inner lens 120 at a predetermined position with respect to the base member 150. A positioning member 130 is provided. The second positioning member 130 extends longer than the first positioning member 128. A fixing member 132 for fixing the inner lens 120 to the substrate 140 is also provided on the lower surface of the inner lens 120.

  Two first positioning members 128, two second positioning members 130, and fixing members 132 are provided on the lower surface of the inner lens 120 so as to be symmetrical twice. Three or more members may be provided.

  The positioning of the inner lens 120 with respect to the substrate 140 and the base member 150 will be described with reference to FIG. Note that FIG. 10 is drawn so that the structure behind can be seen through the inner lens.

  A positioning hole 144 is formed in the substrate 140. By inserting the first positioning member 128 of the inner lens 120 into the hole 144, the inner lens 120 is positioned so that the incident surface 122 is positioned on the optical axis of the semiconductor light source 160. At this time, the lower surface of the fixing member 132 comes into contact with the surface of the substrate 140, and a predetermined distance is maintained between the semiconductor light source 160 on the substrate 140 and the incident surface 122 of the inner lens 120. After the first positioning member 128 is inserted, the inner lens 120 is fixed to the substrate 140 by inserting the pins 146 into the boss holes (not shown) formed in the fixing member 132 from the back side of the substrate 140.

  Two U-shaped notches 142 are formed on the opposite sides of the periphery of the substrate 140. When the inner lens 120 and the substrate 140 are assembled, the second positioning member 130 of the inner lens 120 can extend below the substrate 140 through the notch 142.

  The base member 150 is provided with two horseshoe-shaped receiving portions 152 facing outward in the radial direction and two pin holes (not shown) through which pins are inserted on opposite sides. By aligning the second positioning member 130 extending beyond the lower surface of the substrate 140 with the receiving portion 152, the inner lens 120 is positioned with respect to the base member 150. Thereafter, the inner lens 120 is fixed to the base member 150 by inserting the pins 154 into the boss holes (not shown) formed in the second positioning member 130 from the back side of the base member 150.

  As described above, the substrate 140 on which the semiconductor light source 160 is disposed is fixed via the first positioning member 128 of the inner lens 120, and the base member 150 is interposed via the second positioning member 130 of the inner lens 120. Fixed. That is, the substrate 140 and the base member 150 are not directly coupled, but are coupled only via the inner lens 120. Thus, unlike the structure in which the inner lens and the substrate are separately fixed to the base member, the positioning accuracy between the inner lens and the semiconductor light source on the substrate is not impaired when the base member is attached. Further, the positioning accuracy with the outer lens attached to the base member is also improved. Therefore, the accuracy of the light distribution control of the shiplight 100 can be increased.

  FIG. 11 is a diagram illustrating light ray trajectories in the inner lens 120 and the outer lens 112 of the shiplight 100.

  The light emitted from the semiconductor light source 160 is incident on the incident surface 122 on the lower surface of the inner lens 120. Incident light is reflected outwardly in the radial direction of the inner lens 120 by the inner reflection surface 124 and reaches the emission surface 126 which is a limited range (for example, 180 degrees) in the circumferential direction.

  While the inner surface of the outer lens 112 is a smooth curved surface, a cylindrical surface is provided on the outer surface with a step that curves in a waveform. By each step, light from the exit surface is diffused in the vertical direction. The Thereby, the light distribution which clears the irradiation range of the 15-degree vertical light stipulated by the Marine Collision Prevention Law can be realized.

  As shown in FIG. 6, since the upper side of the outer lens 112 is covered with the shade 116, the light emitted from the inner reflective surface does not leak out.

  Hereinafter, an assembly procedure of the boat lamp 100 according to the second embodiment will be described. First, the first positioning member 128 of the inner lens 120 is inserted into the mounting hole 144 formed in the substrate 140 on which the semiconductor light source 160 is arranged. The pin 146 is inserted into the boss hole of the fixing member 132 from the back side of the substrate 140 to fix the inner lens 120 to the substrate 140. In a state where the inner lens 120 and the substrate 140 are assembled, the second positioning member 130 of the inner lens is inserted into the receiving portion 152 of the base member 150. The pin 154 is inserted into the boss hole of the second positioning member 130 from the back side of the base member 150, and the inner lens 120 is fixed to the base member 150. Further, the outer lens 112 is attached to the base member 150, and finally the shade 116 is attached to the base member 150. If water enters the interior of the shiplight 100, it may cause rusting of metal parts. Therefore, it is preferable that the outer lens 112, the shade 116, and the base member 150 are fixed by ultrasonic welding to prevent water from entering.

  As described above, in the case of a lantern, it is not necessary to emit light over the entire circumference (360 degrees), and it may be emitted in the range of 112.5 degrees defined by the Marine Collision Prevention Law. Therefore, according to the second embodiment, the entrance surface and the internal reflection surface of the inner lens are designed so that almost all of the light incident from the entrance surface is emitted from the exit surface having a spread of 180 degrees, for example. did. As a result, even when a green LED or a red LED whose luminous flux is about half that of a white LED is used as a light source, it is possible to achieve a central luminous intensity (4.3 candela or more) required for a lantern.

  In addition, since the inner lens is attached to the base member after the inner lens and the substrate are assembled, the positioning accuracy between the inner lens and the semiconductor light source on the substrate is impaired when the base member is attached. The accuracy of the light distribution control of the lamp is improved.

(Embodiment 3)
In the second embodiment, a description has been given of a lamp that uses a green LED or a red LED as a light source. In the third embodiment, two optical systems that clear the central luminous intensity defined by the maritime collision prevention method as described in the second embodiment are provided, and functions of both a green right lamp and a red left lamp are provided. Provide ship lights that demonstrate

  FIG. 12 is a front perspective view of a boat lamp 200 according to Embodiment 3 of the present invention. The boat lamp 200 is used as a both-color lamp that emits green light and red light, but may be used for other purposes.

  The shiplight 200 includes an outer lens 212 and an outer shade 216. The outer lens 212 is a substantially cylindrical lens, and the outer shade 216 is for blocking the light from the outer lens 212 and limiting the emission range of the boat lamp 200.

  The outer lens 212 is configured to diffuse light emitted from the emission surfaces of inner lenses 220 </ b> A and 220 </ b> B, which will be described later, in the vertical direction of the shiplight 200. The outer lens 212 is formed of a colorless and transparent resin, but may be a colored and transparent resin or may be formed of a material other than a resin such as glass.

  The outer shade 216 has two openings 216a, light shielding plates 216b provided on both sides of each opening, and an upper base 216c. In the maritime collision prevention method, since the emission range of the lantern is defined as 112.5 degrees, the width of the opening 216a and the radial length of the light shielding plate 216b are set so as to satisfy this regulation. The upper base 216c covers the upper surface of the outer lens 212 and prevents upward light leakage.

  13 is a front view of the boat lamp 200 with the outer shade 216 and the outer lens 212 removed from FIG. 12, and FIG. 14 is a front view of the boat lamp 200 with the inner shade 270 further removed from FIG. It is. Inside the outer lens 212, an assembly including the first optical unit 218A, the second optical unit 218B, the substrate 240, the base member 250, and the inner shade 270 is housed.

  The first optical unit 218A is an optical unit that emits green light, and the second optical unit 218B is an optical unit that emits red light.

  The first optical unit 218A includes a first semiconductor light source 260A and a first inner lens 220A on which light emitted from the first semiconductor light source 260A is incident. The second optical unit 218B includes a second semiconductor light source 260B and a second inner lens 220B into which light emitted from the second semiconductor light source 260B is incident. The first optical unit 218A and the second optical unit 218B are disposed adjacent to each other on the disk-shaped substrate 240.

  The first and second inner lenses 220A and 220B have the same structure as the inner lens 120 described in the second embodiment. That is, the first and second inner lenses 220A and 220B are configured to emit light incident from the first and second semiconductor light sources 260A and 260B in a part of the radial direction, for example, in a range of 180 degrees. It is comprised by the lens parts 221A and 221B made from transparent resin, and the flange part (not shown) extended from the lens parts 221A and 221B to the mutually opposite side.

  The lower surfaces of the first and second inner lenses 220A and 220B are provided with incident surfaces (not shown) for receiving the light emitted from the first and second semiconductor light sources 260A and 260B inside the lenses. As in the case described with reference to FIG. 11, the incident surface is a surface having a substantially concave shape in cross section surrounded by an annular protrusion around the convex portion bulging downward, and the centers thereof are the first and second semiconductors. It is installed so as to be positioned on the optical axis of the light sources 260A and 260B.

  The first and second semiconductor light sources 260A and 260B are disposed on the same substrate 240 with their optical axes facing upward. In the illustrated example, the first semiconductor light source 260A is a green LED (Light Emitting Diode), and the second semiconductor light source 260B is a red LED.

  Although not shown, an electronic circuit for driving the first and second semiconductor light sources 260A and 260B is mounted on the surface of the substrate 240 opposite to the surface on which the semiconductor light sources are disposed. By connecting the first and second semiconductor light sources 260A and 260B in series, both the semiconductor light sources 260A and 260B may be driven by one electronic circuit, or may be driven by separate electronic circuits. For example, the electronic circuit may be mounted on the base member 250 instead of being mounted on the substrate.

  As indicated by an arrow in FIG. 14, the light emitted from the first semiconductor light source 260A is incident on the incident surface on the lower surface of the first inner lens 220A. Incident light is reflected outward in the radial direction of the first inner lens 220A by the inner reflecting surface 224A of the lens portion 221A. Similarly, the light emitted from the second semiconductor light source 260B enters the incident surface on the lower surface of the second inner lens 220B. The incident light is reflected outward in the radial direction of the second inner lens 220B by the inner surface reflecting surface 224B of the lens portion 221B. The light reflected by the first and second inner lenses 220A and 220B enters the outer lens 212 (see FIG. 12).

  The inner surface of the outer lens 212 is a smooth curved surface, whereas the outer surface of the outer lens 212 is formed with a cylindrical surface provided with a step that curves in a waveform. Diffused in the direction. Thereby, the light distribution which clears the irradiation range of the 15-degree vertical light stipulated by the Marine Collision Prevention Law can be realized.

  As in the second embodiment, the first and second inner lenses 220 </ b> A and 220 </ b> B are positioned and fixed with respect to the base member 250. Note that the first and second inner lenses 220A may be configured integrally or may be configured separately.

  The base member 250 is a member to which the first and second inner lenses 220A and 220B, the substrate 240, the inner shade 270, the outer lens 212, and the outer shade 216 are attached and for fixing the assembled shiplight 200 to the hull. is there.

  FIG. 15 is a perspective view showing the internal structure through the inner shade 270 in the assembly shown in FIG. FIG. 16 is a top view of the assembly shown in FIG. FIG. 17A is a top view that allows the inner structure to be seen through the inner shade 270 of FIG.

  Referring to FIG. 17A, the inner shade 270 is divided into two parts, a first shielding plate 272 extending between the first inner lens 220A and the second inner lens 220B, and the first shielding plate 272, and is substantially Y. Second shielding plates 273A and 273B that form a letter-shaped wall, and arc-shaped third shielding plates 274A and 274B that cover the back side (upper side in FIG. 17) of the first inner lens 220A and the second inner lens 220B. I have. Openings 271A and 271B are defined between the second shielding plate 273A and the third shielding plate 274A and between the second shielding plate 273B and the third shielding plate 274B, respectively.

  FIG. 17B is a simplified top view of the inner shade 270, and the locus of light emitted from the first and second inner lenses 220A and 220B is represented by arrows. As can be seen, since the first optical unit 218A and the second optical unit 218B are completely bounded by the first to third shielding plates of the inner shade 270, they are different from the first and second optical units. It is possible to prevent color light (that is, green light and red light) from being mixed. Further, the emission ranges of the first and second optical units can be limited to a predetermined angle by the first to third shielding plates of the inner shade 270. In particular, by providing the third shielding plates 274A and 274B, it is possible to prevent the light internally reflected by the first and second inner lenses 220A and 220B from leaking to the rear side (the upper side in FIG. 17) of the shiplight 200. it can.

  Of the second shielding plates 273A, 273B, the first and second inner lens side surfaces 275A, 275B may be subjected to a textured process for suppressing light reflection. By suppressing the reflection of this surface, it is possible to prevent light unevenness during light distribution.

  In the shiplight 200, if the two semiconductor light sources 260A and 260B mounted on the substrate 240 are turned on simultaneously, the substrate temperature may become too high. Therefore, the inner shade 270 may be formed by aluminum die casting (for example, ADC) and attached so that the inner shade 270 contacts the substrate 240. In this way, heat generated from the semiconductor light sources 260A and 260B (and electronic circuit) is transferred from the substrate 240 to the inner shade 270, so that the heat dissipation performance of the substrate can be improved.

  As described above, according to the third embodiment, the first optical unit and the second optical unit that emit green light and red light, respectively, are incorporated in the outer lens so as to be adjacent to each other. Thereby, the two-color lamp reduced in size compared with the case where the green right lamp and the red left lamp in the second embodiment are stacked in two stages can be provided.

  In the third embodiment, it has been described that the green and red semiconductor light sources are provided. However, the first semiconductor light source 260A and / or the second semiconductor light source 260B is a white light source, and the outer lens 212 is a green lens or a red lens. You may comprise green light and red light. Alternatively, the first semiconductor light source 260A and / or the second semiconductor light source 260B is a white light source, and the first inner lens 220A and / or the second inner lens 220B is a green lens or a red lens to constitute green light and red light. May be.

  The embodiment has been described by taking white light, dark light, and bicolor light for ships as examples. However, a lamp having the same structure as that of the embodiment may be used for applications other than ships, for example, for vehicles.

  Further, any of the inner lenses described above can also be used for light distribution control with a lamp other than a ship lamp. For example, the inner lens 120 used for the lantern can reflect the light incident on the incident surface in a direction substantially perpendicular to the optical axis of the light source, and can limit the irradiation range to a specific angular range in the circumferential direction. Therefore, it can be used as a lens for various lamps including a vehicular lamp.

  DESCRIPTION OF SYMBOLS 10 Shiplight, 12 Outer lens, 20 Inner lens, 22 Incident surface, 24 Inner reflecting surface, 26 Outgoing surface, 28 1st positioning member, 30 2nd positioning member, 40 Board | substrate, 50 Base member, 60 Semiconductor light source, 100 Ship Lamp (general lamp), 112 outer lens, 120 inner lens, 122 incident surface, 124 inner reflecting surface, 126 exit surface, 128 first positioning member, 130 second positioning member, 140 substrate, 150 base member, 160 semiconductor light source, 200 ship light (both color lights), 212 outer lens, 218A first optical unit, 218B second optical unit, 220A first inner lens, 220B second inner lens, 240 substrate, 250 base member, 260A first semiconductor Source, 260B second semiconductor light source 270 inside the shade.

Claims (7)

A substrate,
A semiconductor light source disposed on the substrate with the optical axis facing upward;
An inner lens having an incident surface, an inner reflection surface that reflects light incident from the incident surface in a substantially horizontal direction, and an emission surface that emits the light reflected from the inner surface;
A substantially cylindrical outer lens that diffuses light emitted from the exit surface in the vertical direction;
With
The lamp, wherein the inner lens includes a positioning member that fixes the inner lens on the substrate so that the incident surface is positioned on the optical axis of the semiconductor light source.   2. The lamp according to claim 1, wherein an electronic component for driving the semiconductor light source is disposed on a surface of the substrate opposite to the side on which the semiconductor light source is disposed.   The exit surface is substantially semicircular or substantially arc-shaped, and the inner reflection surface is configured to reflect light incident from the entrance surface within a range of the exit surface. Or the lamp according to 2. A base member to which the outer lens and the inner lens are attached;
The lamp according to claim 1, wherein the inner lens includes a second positioning member that fixes the inner lens at a predetermined position on the base member. An inner lens having a light incident surface, a light reflecting surface that reflects light incident from the light incident surface in a substantially horizontal direction, a light emitting surface that emits light reflected from the light inner surface, and first and second positioning members, a semiconductor Preparing a substrate on which a light source is arranged, and a base member;
Fixing the inner lens to the substrate using the first positioning member so that the incident surface is positioned on the optical axis of the semiconductor light source;
The lamp assembly method comprising: fixing the combined inner lens and the substrate to the base member using the second positioning member. A first optical unit and a second optical unit;
The first optical unit includes a first semiconductor light source, and a first inner lens into which light emitted from the first semiconductor light source is incident,
The second optical unit includes a second semiconductor light source, and a second inner lens that receives light emitted from the second semiconductor light source and emits light of a color different from that of the first inner lens,
The lamp according to any one of claims 1 to 4, wherein the first optical unit and the second optical unit are disposed adjacent to each other.   The lamp according to claim 6, wherein a shade that borders the first optical unit and the second optical unit is disposed in the outer lens.