JP6195497B2 - Reflector for lamp - Google Patents

Description

  The present invention relates to a reflector for a lamp used in a field related to navigation or aviation.

  In order to ensure the safety of voyage and air traffic, it is obliged to attach a lamp to the hull or aircraft by law or regulation. For example, the light emission range at each installation position and the color of the emitted light Is defined in detail. In recent years, a lamp using, for example, a light emitting diode as a light source has been proposed, and proposals have been made regarding techniques such as luminous intensity and light distribution by the light emitting diode.

  The shiplight described in Patent Document 1 includes a light source composed of a large number of light emitting diodes arranged in a circular or arc shape in the horizontal direction, and a pair of disk-shaped and conical reflections disposed above and below the light source. With a mirror. The ship lamp includes a base unit in which a power supply circuit is accommodated, a trunk cylinder provided on the base unit and containing the light source and the reflecting mirror, and a top unit provided on the trunk cylinder. Have Between the base unit and the top unit, a light-shielding plate that shields light from the light source is provided in a necessary angular range in the circumferential direction (for example, paragraphs [0018] and [0018] in the specification of Patent Document 1). 0024], see FIG.

  In order to obtain a desired light distribution angle when viewed in the horizontal direction, the lamp buoy described in Patent Document 2 has a large number of light emitting diodes arranged in a ring shape as a light source, and a parabolic reflection. And an annular saddle-shaped reflecting mirror having a surface (see, for example, paragraph [0026] of FIG. 2 in the specification of Patent Document 1).

JP 2007-27052 A JP 2007-313946 A

  Regarding ship lights, it is necessary to comply with regulations such as the Ship Safety Law. This regulation stipulates that a light intensity of a predetermined value or more must be realized over a predetermined range in the axial direction, a light intensity of a predetermined value or more must be realized over a predetermined angle in the circumferential direction, and the like. However, for example, in the ship lamp described in Patent Document 1, the light emitted from the LED is condensed by a reflecting mirror and further condensed by a convex lens. Two-step control is required, and it is not easy to comply with the above regulations.

  In view of the circumstances as described above, an object of the present invention is to provide a lamp reflector capable of realizing a light intensity of a predetermined value or more over a predetermined range in the circumferential direction and the axial direction.

In order to achieve the above object, a lamp reflector according to an embodiment of the present invention includes a base portion, a top portion, and a reflecting portion.
The reflection part includes a curved body and an annular convex surface part. The curved surface body is provided between the base portion and the top portion, and is composed of a rotation curve centered on the top portion. The annular convex surface portion is provided on the curved body and is arranged concentrically with the top portion as the center.

  Many of the conventional reflectors have a continuous mirror surface, so they are severely affected by light source placement errors and peripheral accessories, and are susceptible to variations in luminous intensity in the circumferential or axial direction. . On the other hand, in the present invention, since the reflecting portion has a plurality of annular convex surface portions, the light diffusion function in each annular convex surface portion reduces the influence of light source placement errors and peripheral accessories. I have to. As a result, it is possible to achieve a light intensity greater than or equal to a predetermined value while suppressing variations in light intensity over a predetermined range in the circumferential direction and the axial direction.

In the plurality of annular convex surface portions, the arrangement pitch increases from the top portion toward the base portion.
Thereby, the arrangement pitch of the annular convex surface portions can be optimized according to the change in the curvature of the curved body, and the degree of freedom in optical design can be improved.

  The form of the reflector can be appropriately changed according to the type of the lamp and the structure of the light source unit. Typically, the shape of the reflector can be appropriately changed according to the number and arrangement of light sources (for example, LEDs).

For example, when the light source unit has a plurality of light sources arranged on the same circumference, the top part of the reflector may have a flat part and a connection part. The connection portion is configured to be connectable to a substrate that is provided on the flat portion and supports a plurality of light sources arranged at equiangular intervals around the top portion.
Thereby, the relative positional accuracy between each light source and the reflector can be ensured. Further, since the plurality of annular convex surface portions are arranged concentrically around the top portion, the light from each light source is diffusely reflected under uniform conditions. As a result, it is possible to achieve a light intensity of a predetermined value or more over a predetermined range in the circumferential direction and the axial direction.

On the other hand, when the light source unit has a single light source, the top of the reflector has a sharp portion. The base portion has a connection portion that can be connected to a support body on which a light source facing the sharpened portion is arranged and supports the substrate.
Even in this case, while ensuring the relative positional accuracy between the light source and the reflector, the light emitted from each light source is diffusely reflected by the reflecting portion, and the predetermined value or more over a predetermined range in the circumferential direction and the axial direction. Luminous intensity can be realized.

  As described above, according to the present invention, it is possible to achieve a light intensity of a predetermined value or more over a predetermined range in the circumferential direction and the axial direction.

It is a perspective view which shows the front side of the lamp device which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the back side of the said lamp. It is a disassembled perspective view of the said lamp. It is a top view of the said lamp. FIG. 5 is a partial schematic cross-sectional view taken along line AA in FIG. 4. It is a disassembled perspective view of the light source unit in the said lamp. It is a top view of the reflector in the said light source unit. It is an enlarged view of the principal part in FIG. It is a side view of the said reflector. It is the BB sectional view taken on the line in FIG. It is an enlarged view of the principal part in FIG. It is a ray tracing figure of the light source light reflected by the reflector, A shows a state of diffusion of light reflected by any one annular convex surface portion, and B shows diffusion of light reflected by the entire reflection portion. The state of is shown. It is a ray tracing figure of the light source light reflected by the reflector which concerns on a comparative example, A shows the mode of diffusion of light reflected by arbitrary one annular convex part, and B is reflected in the whole reflective part. It shows how light diffuses. It is sectional drawing which shows the lamp device which concerns on the 2nd Embodiment of this invention. It is a disassembled perspective view of the light source unit in the said lamp. It is a top view of the reflector in the said light source unit. It is a side view of the said reflector. It is CC sectional view taken on the line in FIG. It is an enlarged view of the principal part in FIG. It is a schematic diagram which shows the example of arrangement | positioning of the ship light to a hull.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1. General Description of Ship Light As a lamp according to an embodiment of the present invention, a ship light installed on a hull will be described. FIG. 19 shows an example of the arrangement of boat lights on the hull. Generally, the hull 1000 includes a bow lamp 1001, a stern lamp 1002, a central mast lamp 1003, and a lamp 1004 including a starboard lamp and a port lamp. The range of light emitted by these various lamps conforms to the Ship Safety Law. Depending on the size of the ship, the number of installed ship lights differs. For example, in the case of a small-sized ship, there is a case where a single lamp with the left and right lamps integrated is used.

  Specifically, the illuminating range of the bow lamp 1001 and the central mast lamp is defined as 225 ° centering on the bow direction, and the radiating range of the stern lamp 1002 is defined as 135 ° centering on the stern direction. . Further, the illumination range of the lantern 1004 is defined as 112.5 ° from the bow direction to the left and right, respectively.

  There are two types of ship lights: a single type with a service light only, and a double system with a service light and a spare light. For ships navigating the pelagic area, double-type ship lights are mainly used.

<First Embodiment>
(Whole structure of the lamp)
FIG. 1 is a perspective view showing the front side of a single shiplight as a lamp according to the first embodiment of the present invention. FIG. 2 is a perspective view showing the back side of the lamp device 100 shown in FIG. FIG. 3 is an exploded perspective view of the lamp device 100. The lamp device 100 is mainly used with the z direction as the vertical direction (vertical direction) in FIG. In the following description, the z direction is the vertical direction, and the x and y directions are the biaxial directions perpendicular to each other in the horizontal plane.

  The lamp 100 is connected to the light source unit 10 (see FIG. 3), a housing 50 that houses the light source unit 10, a louver 90 that defines a light emission range from the lamp 100, and the top and bottom of the housing 50. End member 60.

  The container 50 includes, for example, a translucent outer cover (cover) 20 and a base cover 30 attached to the outer cover 20. The end member 60 includes, for example, a lid 70 attached to the upper part of the outer cover 20 and a base 80 attached to the lower part of the base cover 30. The base 80 is a part mainly for attaching the lamp 100 to the hull, and has a plurality of legs 81 for fixing to the hull. The lid 70 is provided with a handle 71. Each component of the light source unit 10, the outer cover 20, the base cover 30, the lid 70, and the base 80 has a generally cylindrical shape.

  FIG. 4 is a plan view of the lamp device 100. FIG. 5 is a partial schematic cross-sectional view taken along line AA in FIG. FIG. 6 is an exploded perspective view of the light source unit 10.

  One end (lower end in the drawing) of the outer cover 20 is opened, and one end (upper end in the drawing) facing the one end of the base cover 30 is opened. The outer cover 20 is provided with a protruding portion 21 (see FIG. 3) protruding outward, and the base cover 30 also has a protruding portion having a shape that substantially corresponds to the shape of the protruding portion 21. 31 is provided. A plurality of, for example, six screw holes 21a and 31a are formed in the projecting portions 21 and 31, respectively. The outer cover 20 and the base cover 30 are connected by the projecting portions 21 and 31 coming into contact with each other and fastened with the screw N1. Further, a seal ring 59 shown in FIGS. 3 and 5 is interposed between the projecting portions 21 and 31.

  An opening 22 is formed at the upper center of the outer cover 20, and a valve (not shown) for adjusting the air pressure in the container 50 is provided on the opening 22 through the opening 22.

  As shown in FIG. 3, the louver 90 includes a main body portion 93 that forms a part of a cylindrical body and has a light shielding property, and a blade portion 95 provided so as to spread from the main body portion 93. The louver 90 is attached so as to be sandwiched between the lid 70 and the outer cover 20.

  The outer cover 20 is made of a translucent material and has a side peripheral portion 23 that mainly emits light from the light source unit 10 to the outside. In addition, the outer cover 20 has the protruding portion 21 that protrudes outward from the side peripheral portion 23 as described above. The protruding portion 21 has a mounting area 25 for the louver 90. The attachment region 25 includes a circumferential groove 26 and a locking groove 27 as an attachment portion. The circumferential groove 26 is a groove that is provided over the entire circumference of 360 ° along the outer shape of the side circumferential portion 23 and in which the main body 93 of the louver 90 is disposed. The locking grooves 27 are respectively connected to the circumferential grooves 26 at predetermined angular positions around the circumferential grooves 26, and engage with the blade portions 95 of the louver 90.

  A plurality of sets of locking grooves 27 are provided at predetermined positions of the circumferential groove 26 so that a plurality of types of louvers having different light shielding angle ranges in the circumferential direction around the z-axis can be attached. The one louver is locked with the movement around the z-axis being substantially restricted by engaging the pair of locking grooves 27 with the predetermined two of the plurality of locking grooves 27. . Similarly, the other louvers are locked to the outer cover 20 by engaging with another set of locking grooves 27 different from the set of locking grooves 27. Thus, in the present embodiment, a plurality of types of louvers can be supported by the common outer cover 20.

  Similarly to the outer cover 20, the lid 70 also has a mounting region 75 for the louver 90 including a circumferential groove 76 (see FIG. 5) and a locking groove 77 (see FIGS. 1 and 2). Specifically, the lid 70 has an attachment region 75 at the outer peripheral edge at the lower end. In each of the attachment regions 25 of the outer cover 20 and the lid 70 in FIG. 5, only the circumferential grooves 26 and 76 are drawn depending on the cross-sectional positions, and the locking grooves 27 and 77 are not drawn.

  The arrangement of the locking grooves 77 of the lid 70 is the same angle as that of the locking grooves 27 of the outer cover 20. Accordingly, the louver 90 is attached to the lamp body such that the attachment region 25 of the outer cover 20 and the attachment region 75 of the lid 70 sandwich the louver 90.

  As shown in FIG. 4 and the like, a reference mark 72 serving as a reference for the orientation of the lamp 100 is attached to the upper surface of the lid 70. The fiducial mark 72 is preferably formed integrally when the lid 70 is molded. However, in addition to such a method, the fiducial mark 72 may be connected to the lid 70 by an adhesive or ultrasonic bonding means after the lid 70 is formed. Good. An operator on the manufacturing side of the lamp device 100 or a user of the lamp device 100 (hereinafter referred to as a worker) assembles the lamp device 100 based on the reference mark 72, attaches the louver 90 to the mounting portion, Since the vessel 100 can be installed on the hull, its assembly and installation are facilitated. For example, in the present embodiment, the lamp 100 can be installed at each position of the hull so that the reference mark 72 is directed in the bow direction.

(Configuration of light source unit)
As shown in FIGS. 5 and 6, the light source unit 10 includes a light source substrate 11 on which one or a plurality of LEDs (Light Emitting Diodes) 15 which are solid light emitting elements as light sources are mounted, and a reflector that reflects light from the LEDs 15. 12 and an inner cover 13 as a support that integrally supports the LED 15 and the reflector 12.

  The inner cover 13 is a part formed by, for example, integral molding, is made of a translucent resin material, and has a substantially cylindrical shape. The side wall that forms the inner cover 13 includes a first peripheral wall portion 136 that forms the light emission region 13A and a second peripheral wall portion 137 that forms the substrate arrangement region 13B. The 1st surrounding wall part 136 has translucency which can permeate | transmit the light reflected by the reflection part 124 of the reflector 12. FIG. On the other hand, the second peripheral wall portion 137 may have a surface formed like a plurality of chamfering processes in order to make the inside of the substrate arrangement region 13B less visible (or invisible), or colored. It may be.

  As shown in FIG. 5, the inner cover 13 is divided into two regions, a light emission region 13 </ b> A and a substrate placement region 13 </ b> B, by a partition plate 131. An upper opening 132 and a lower opening 133 are formed by opening the upper end of the light emitting area 13A of the inner cover 13 and the lower end of the substrate arrangement area 13B, respectively, whereby the cross section of the inner cover 13 is approximately H Has a shape.

  In FIG. 5, the light source substrate 11 and the reflector 12 are mainly disposed in the light emitting region 13 </ b> A that is the upper region. For example, two circuit boards (the power supply board B1 and the control board B2) are arranged in the board arrangement area 13B that is the lower area.

  The partition plate 131 has a first surface S1 facing the light emission region 13A and a second surface S2 facing the substrate placement region 13B on the opposite side. A fixing base 131a that supports the light source substrate 11 is provided on the first surface S1, and a supporting base 131b that supports the power supply substrate B1 and the control substrate B2 is provided on the second surface S2. Thus, since the power supply board B1 and the control board B2 are installed in the area other than the light emitting area 13A, it is possible to install these circuit boards without restricting the light emitting area.

  The power supply board B1 and the control board B2 are electrically connected to the light source board 11 via the connector 11d and are screwed to the support base 131b. The power supply board B1 supplies power to the LED 15. The control board B2 controls the driving of the LED 15 by the power supply board B1 and monitors the operation of the LED 15. Note that the power supply board B1 and the control board B2 do not have to be separate from each other as described above, and may be configured by one board.

  A lower flange 135 formed in a polygonal shape, for example, a substantially hexagonal shape as viewed in the z direction, is provided at the end portion (lower end in FIG. 5) of the second peripheral wall portion 137. At least three of the holes 135a provided at the six corners of the lower flange 135 are screw holes. As shown in FIG. 3, three screw hole portions 39 are provided on the bottom of the base cover 30 at positions corresponding to the three screw holes. Thereby, the inner cover 13 is fixed to the base cover 30 with the screw (see FIG. 5) N2, and the light source unit 10 is attached to the housing 50 including the base cover 30.

  The light source board 11, the power supply board B1, and the control board B2 are connected by a cable group 16. Two attachment holes 38 for connecting two harnesses 58 (see FIGS. 3 and 5) are provided at predetermined locations on the side peripheral wall 32 of the base cover 30. The cable group 17 for external connection such as the power supply board B1 is drawn out of the lamp device 100 through these harnesses 58.

  Next, details of the light source substrate 11 and the reflector 12 will be described.

  The light source unit 10 of the present embodiment includes a plurality (six in the illustrated example) of LEDs 15 arranged on the light source substrate 11 at equal angular intervals on the same circumference. Hereinafter, for convenience of explanation, an axis parallel to the vertical axis (z axis) passing through the center of the circle in which the plurality of LEDs 15 are arranged is referred to as a “light source central axis”.

  Ship lights have different emission colors depending on their types. For example, the mast lamp and the stern lamp are each configured to emit white light, the starlight is green, and the portlight is red. The light emission color may be determined by the light emission color of the LED 15, or the light emission area of the inner cover 13 or the outer cover 20 made of a translucent material may be colored in a color corresponding to the lamp type.

  The reflector 12 includes a top part 122 that faces the light source substrate 11, a base part 126 that is supported by the inner cover 13, and a reflection part 124 that is provided between the top part 122 and the base part 126.

  The inner cover 13 includes a partition plate 131 (first support portion) that supports the light source substrate 11 and an upper flange 134 (second support portion) that supports the reflector 12. The partition plate 131 is provided at the lower end portion of the first peripheral wall portion 136, and the upper flange 134 is provided around the upper opening 132 of the first peripheral wall portion 136. A plurality of protrusions 134a (engaging portions) are provided at predetermined angular positions around the z-axis of the upper flange 134. As shown in FIG. 6, these protrusions 134 a engage with holes 126 a provided in the base portion 126 of the reflector 12, so that the lower surface of the base portion 126 is placed on the upper surface of the upper flange 134 of the inner cover 13. Is done.

  7 is a plan view of the reflector 12, FIG. 8 is a side view of the reflector, FIG. 9 is a cross-sectional view taken along line BB in FIG. 7, and FIG. 10 is an enlarged view of a main part in FIG.

  The reflector 12 includes a base portion 126, a top portion 122, and a reflection portion 124. The reflector 12 has a generally cone shape as a whole. The reflector 12 is formed of, for example, an injection-molded body of a plastic material, and is manufactured by covering an outer surface including at least the reflection portion 124 with a metal film such as aluminum or silver.

  The reflection part 124 is provided between the base part 126 and the top part 122, and is comprised so that the emitted light from a light source (LED15) can be reflected. The reflection unit 124 includes a curved surface body 120 formed of a rotation curve including a rotation curve centered on the top portion 122, and a plurality of annular convex surface portions 121 provided on the curved surface body 120. The reflecting portion 124 is connected to the base portion 126 via a cylindrical connecting portion 125 at the maximum radius position.

  The macro shape of the reflecting portion 124 is a quadratic curved surface (for example, a paraboloid or an ellipsoid). That is, the macro shape of the cross section of the reflecting portion 124 as seen in the cross section shown in FIG. 9 draws a quadratic curve. The curved surface body 120 is constituted by a rotation curve obtained by rotating the quadratic curve around the central axis 12c passing through the center of the top portion 122. The curved surface 120 is formed of a quadric surface that is convex toward the central axis 12c, and the specific shape is determined according to the number and position of the LEDs 15, the emission range of light from the lamp 100, and the like. .

  The plurality of annular convex surface portions 121 are arranged concentrically around the top portion 122. Each of the plurality of annular convex surface portions 121 has a convex curved surface portion that is arranged along the surface of the curved surface body 120 and protrudes from the surface of the curved surface body 120 to the side opposite to the central axis 12c. Each of the annular convex surface portions 121 has an equivalent shape in the circumferential direction, and is formed such that the radius from the central axis 12 c gradually increases from the top portion 122 toward the base portion 126.

  The curvature radius of the curved surface portion constituting the annular convex surface portion 121 varies depending on the radial position of the curved surface body 120, and the size thereof is not particularly limited, and is appropriately set according to the optical specifications, for example, 1 m to 100 m. Set to range. The height of the convex portion of the annular convex portion 121 is not particularly limited, and can be set as appropriate according to the radial position of the curved body 120. For example, the height is set to about 0.25 mm at maximum.

  The arrangement pitch of the annular convex surface portions 121 is not particularly limited, and is appropriately set according to required optical characteristics. In the present embodiment, the arrangement pitch of the annular convex surface portions 121 increases from the top portion 122 toward the base portion 126.

  In the present embodiment, the top portion 122 has a flat portion 122 a that faces the light source substrate 11. The plane part 122a is formed in parallel to the xy plane, and its central axis 12c is arranged at the center of the circumference (light source central axis) where the plurality of LEDs 15 are arranged.

  In the present embodiment, for example, the reflector 12 and the light source substrate 11 are relatively positioned so that each LED 15 is arranged on one focal point of a quadratic curve of the reflection unit 124. Specifically, after the light source substrate 11 is positioned and fixed on the fixing base 131a provided on the partition plate 131, the top portion of the reflector 12 is aligned so that the central axis 12c of the reflector 12 and the central axis of the light source are aligned. 122 (planar portion 122 a) is placed on the light source substrate 11. That is, the light source substrate 11 has a plurality of fitting holes 11a that fit with a plurality of protrusions 131p provided on the fixing base 131a, and thereby the relative position between the light source substrate 11 and the fixing base 131a is defined. .

  On the other hand, the top part 122 has a plurality of connection parts 122 b connected to the light source substrate 11. The plurality of connection portions 122 b are provided on the flat portion 122 a so as to protrude toward the light source substrate 11, and engage with the plurality of connection holes 11 b provided on the light source substrate 11. Thereby, since the relative position of the light source board | substrate 11 and the reflector 12 is prescribed | regulated, the variation of the luminous intensity to the circumferential direction and axial direction of the lamp device 100 by the shift | offset | difference of the central axis 12c of the reflector 12 and a light source central axis can be suppressed. .

  Further, the top portion 122 is provided with a plurality of screw insertion holes 122 c for fixing the reflector 12 to the light source substrate 11. The plurality of screw insertion holes 122c are provided corresponding to the plurality of screw insertion holes 11c provided in the light source substrate 11 and the screw holes P1 provided in the partition plate 131, and the reflector 12 includes a plurality of unillustrated reflectors. It is fixed to the light source substrate 11 and the partition plate 131 via screw members.

  The fixing means for the top portion 122 of the reflector 12 and the light source substrate 11 may be a mechanical engaging means different from the screw or an adhesive.

  Thus, the positioning of the reflector 12 and the light source substrate 11 is mainly performed by the top portion 122, and the engagement between the protrusion 134a of the upper flange 134 and the hole 126a of the base portion 126 is performed as a secondary or auxiliary positioning. Become.

(Operation of light source unit)
In the light source unit 10 configured as described above, the plurality of LEDs 15 on the light source substrate 11 are turned on simultaneously, and the emitted light is reflected by the reflecting portion 124 of the reflector 12. The light reflected by the reflecting portion 124 is emitted in the entire circumferential direction of the lamp device 100 through the first peripheral wall portion 136 of the inner cover 13 and the side peripheral portion 23 of the outer cover 20.

  In the present embodiment, each annular convex surface portion 121 can reflect the light from the LED 15 so as to diffuse, so that the entire reflecting portion 124 can emit uniform light. That is, even when an LED that is a point light source is used, uniform light can be emitted from the entire reflecting portion 124 that is a set of the annular convex surface portions 121.

  11A and 11B are ray tracing diagrams of the light emitted from the LED 15 reflected by the reflector 12. A shows a state of diffusion of light reflected by any one annular convex surface portion 121, and B shows a reflection. The state of diffusion of light reflected by the entire unit 124 is shown.

  On the other hand, FIGS. 12A and 12B are ray tracing diagrams of light source light reflected by a reflector 12R in which a reflecting portion 124R shown as a comparative example is formed of a continuous mirror surface, and A is a state of diffusion of light reflected in a unit region. B indicates the state of diffusion of the light reflected by the entire reflecting portion 124R.

  In the reflector 12R according to the comparative example, as shown in FIGS. 12A and 12B, the light source light is regularly reflected by the reflecting portion 124R to be emitted in the circumferential direction (xy plane direction) of the lamp. At this time, since the diffusion angle in the axial direction (z direction) of the lamp is determined by the slope of the curve constituting the reflecting portion 124r, the irradiation angle in the axial direction is limited as a whole for the reflecting portion 124r. It will be.

  On the other hand, in the light source unit 10 of the present embodiment, since the plurality of annular convex surface portions 121 are provided on the surface of the reflecting portion 124 of the reflector 12, the emitted light of each LED 15 is transmitted in the axial direction of the lamp 100 ( The light is reflected in the circumferential direction (xy plane direction) of the lamp device 100 while being diffused in the z direction). As a result, it is possible to achieve a light intensity of a predetermined value or more over a wider irradiation range in the axial direction.

  Further, in the reflector 12R according to the comparative example, since the reflecting portion 124R is configured by a continuous mirror surface, the light source is severely affected by the placement error of the light source, peripheral accessories, dimensional tolerance of the reflecting portion, etc. It was easy for variations in luminous intensity to occur in the axial direction.

  On the other hand, in the reflector 12 of the present embodiment, since the reflecting portion 124 has a plurality of annular convex surface portions 121, the light diffusion function in each annular convex surface portion 121 causes the light source placement error and the surroundings. The effects of accessories and dimensional tolerances will be alleviated. As a result, it is possible to achieve a light intensity greater than or equal to a predetermined value while suppressing variations in light intensity over a predetermined range in the circumferential direction and the axial direction.

  Further, the plurality of annular convex surface portions 121 are formed so that the arrangement pitch increases from the top portion 122 toward the base portion 126. Thereby, the arrangement pitch of the annular convex surface portions can be optimized according to the change in the curvature of the curved body, and the degree of freedom in optical design can be improved.

  More specifically, since the arrangement pitch of the annular convex surface portions 121 increases as the distance from the LED 15 increases, the annular convex surface portion 121 corresponding to the light emission angle (diffusion angle) from the LED 15 can be optimized. Thereby, the emitted light from LED15 can be utilized efficiently, and it becomes possible to implement | achieve the light intensity more than predetermined in the circumferential direction and axial direction of the lamp device 100 easily.

  According to the experiments by the present inventors, it is possible to irradiate parallel light rays in the range of the angle (z direction) in the axial direction (z direction) with respect to the circumferential direction, and the maximum luminous intensity in the circumferential direction at a specific z position It was confirmed that uniform light having a difference between the minimum luminous intensity and the minimum luminous intensity within 1.5 times (the maximum luminous intensity in the circumferential direction at a specific z position is 1.5 times or less of the minimum luminous intensity) can be obtained.

  Furthermore, according to this embodiment, since the light source 15 and the reflector 12 can be made into a unit structure by the light source unit 10, it is possible to reduce the number of parts, reduce the size of the lamp 100, and the like. In addition, the light source unit can be commonly used for a plurality of lamps having different lamp types.

<Second Embodiment>
FIG. 13 is a cross-sectional view showing a lamp according to the second embodiment of the present invention. In the following description, the same members, functions, and the like included in the lamp according to the first embodiment will not be described or will be mainly described.

  The lamp 200 according to the present embodiment includes a light source unit 110 that is different from the light source unit 10 of the lamp 100 according to the first embodiment. FIG. 14 is an exploded perspective view of the light source unit 110. The inner cover 13 of the light source unit 110 has the same configuration as the inner cover 13 according to the first embodiment.

  The light source mounted on the light source substrate 111 is one LED 15, and the LED 15 is arranged at the center of the light source substrate 111. The vertical axis passing through the position of the LED 15 is referred to as a “light source central axis” for convenience of explanation.

  15 is a plan view of the reflector 18, FIG. 16 is a side view of the reflector, FIG. 17 is a cross-sectional view taken along the line CC in FIG. 15, and FIG. 18 is an enlarged view of the main part in FIG.

  The reflector 18 has a base portion 186, a top portion 182, and a reflection portion 184. The reflector 18 has a generally cone shape as a whole. The reflector 18 is formed of, for example, an injection-molded body made of a plastic material, and is manufactured by covering an outer surface including at least the reflection portion 184 with a metal film such as aluminum or silver.

  The reflection part 184 is provided between the base part 186 and the top part 182 and is configured to be able to reflect light emitted from the light source (LED 15). The reflecting portion 184 includes a curved surface body 180 formed of a rotational curve having a rotational curve centered on the top portion 182, and a plurality of annular convex surface portions 181 provided on the curved surface body 180. The reflecting portion 184 is connected to the base portion 186 via a cylindrical connecting portion 185 at the maximum radius position.

  As in the first embodiment, the macroscopic shape of the reflecting portion 184 is a quadratic curved surface (for example, a paraboloid or an ellipsoid). That is, the macroscopic shape of the cross section of the reflecting portion 184 as seen in the cross section shown in FIG. 17 draws a quadratic curve. The curved surface 180 is constituted by a rotation curve obtained by rotating this quadratic curve around a central axis 18c passing through the center of the top portion 182. The curved surface body 180 is configured by a quadric surface having a convex shape toward the central axis 18c.

  The annular convex surface portion 181 is also configured similarly to the first embodiment. In other words, the plurality of annular convex surface portions 181 are arranged concentrically around the top portion 182. The plurality of annular convex surface portions 181 respectively have convex curved surface portions that are arranged along the surface of the curved surface body 180 and project from the surface of the curved surface body 180 to the side opposite to the central axis 18c. Each of the annular convex surface portions 181 has an equivalent shape in the circumferential direction, and is formed so that the radius from the central axis 12 c gradually increases from the top portion 182 toward the base portion 186.

  The radius of curvature of the curved surface portion constituting the annular convex surface portion 181 differs depending on the radial position of the curved surface body 180, the size thereof is not particularly limited, and is appropriately set according to the optical specifications, for example, 1 m to 50 m. Set to range. The height of the convex portion of the annular convex portion 181 is not particularly limited, and can be set as appropriate according to the radial position of the curved body 180. For example, the maximum height is set to about 0.25 mm.

  The arrangement pitch of the annular convex surface portions 181 is not particularly limited, and is appropriately set according to required optical characteristics. In the present embodiment, the arrangement pitch of the annular convex surface portions 181 increases from the top portion 182 toward the base portion 186.

  In the present embodiment, the top portion 182 has a sharpened portion 182 a that faces the light source substrate 11. The center of the sharpened portion 182a (center axis 12c) is arranged at the center of the light exit of the LED 15 (light source central axis).

  In the present embodiment, the reflector 18 is positioned with respect to the light source substrate 111 so that light emitted from the single LED 15 at a predetermined emission angle is irradiated to the entire circumference of the reflecting portion 184. Specifically, after the light source substrate 111 is positioned and fixed on a fixing base 131 a provided on the partition plate 131 (first support portion), the base portion 186 of the reflector 18 is fixed to the upper flange 134 of the inner cover 13. It is mounted on (second support part). That is, the light source substrate 111 has a plurality of fitting holes 111a that are fitted to the plurality of protrusions 131p provided on the fixing base 131a, and thereby the relative position between the light source substrate 111 and the fixing base 131a is defined. .

  On the other hand, the base portion 186 has a plurality of holes 186 a that engage with the plurality of protrusions 134 a on the upper flange 134. Furthermore, the lower surface of the base portion 186 has a first inclined portion 186c that faces the first peripheral wall portion 136 of the inner cover 13, and the upper flange 134 of the inner cover 13 is a second portion that contacts the first inclined portion 186c. The inclined portion 134c is provided. The first inclined portion 186 c is formed over the entire circumference of the base portion 186, and is configured by an inclined surface inclined downward toward the top portion 182. The second inclined portions 186 c and 134 c are formed over the entire circumference of the upper flange 134, and are configured with inclined surfaces that are inclined downward toward the light source substrate 111.

  The second inclined portion 134c has a function of guiding the top portion 182 (the sharpened portion 182a) of the reflector 18 to a position directly above the LED 15 by the engaging action with the first inclined portion 186c. Thereby, since the relative position of the light source board | substrate 11 and the reflector 12 is prescribed | regulated, the variation of the luminous intensity to the circumferential direction and axial direction of the lamp device 200 by the shift | offset | difference of the central axis 18c of the reflector 12 and a light source central axis can be suppressed. .

  The reflector 18 and the inner cover 13 are a plurality of screws (not shown) that are screwed into a plurality of screw holes 134 b provided in the upper flange 134 via a plurality of screw insertion holes 186 b provided in the base portion 186. They are fixed to each other by members.

    Also in the light source unit 110 of the present embodiment configured as described above, it is possible to obtain the same functions and effects as those of the first embodiment described above. That is, according to the present embodiment, since the reflecting portion 184 has a plurality of annular convex surface portions 181, the light diffusion function in each of the annular convex surface portions 181 affects the influence of light source placement errors and peripheral accessories. Can be relaxed. As a result, it is possible to achieve a luminous intensity of a predetermined value or more while suppressing variations in luminous intensity over a predetermined range in the circumferential direction and the axial direction of the lamp device 200.

  The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

  For example, in the above embodiment, one or a plurality of LEDs 15 are used as the light source, but a surface light source such as an EL element or a linear light source such as CCFL may be employed instead of these point light sources.

  In each of the above embodiments, the lamp is described as a ship lamp, but it can also be used as a lamp mounted on an aircraft body or a marker lamp.

DESCRIPTION OF SYMBOLS 10,110 ... Light source unit 11, 111 ... Light source board 12, 18 ... Reflector 13 ... Inner cover 15 ... LED
DESCRIPTION OF SYMBOLS 100,200 ... Lamp 122,182 ... Top part 122a ... Plane part 122b ... Connection part 124,184 ... Reflection part 126,186 ... Base part 120,180 ... Curved body 121,181 ... Annular convex surface part 131 ... Partition plate 136 ... 1st surrounding wall part 182a ... Pointed part

Claims (3)

A base part;
The top,
A curved surface body formed of a rotation curve centered on the top portion provided between the base portion and the top portion, and a plurality of annular shapes provided on the curved surface body and continuously arranged concentrically around the top portion ; and a reflective portion and a convex portion,
The arrangement pitch of the plurality of annular convex surface portions increases from the top portion toward the base portion,
Each of the curved surface portions constituting the plurality of annular convex surface portions has a curvature radius that varies depending on a radius position of the curved surface body . The lamp reflector according to claim 1 ,
The top is
A plane portion;
A reflector for a lamp, comprising: a connecting portion provided on the flat portion and connected to a substrate supporting a plurality of light sources arranged at equiangular intervals around the top portion; The lamp reflector according to claim 1 ,
The top portion has a sharpened portion,
The said base part has a connection part which can be connected with the support body which the light source facing the said sharp part is arrange | positioned, and supports a board | substrate. The reflector for lamps.

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