Light source device and airplane warning light

Abstract

To provide a light source device which has a simple structure and which is easy to mount, and to provide an airplane warning light.SOLUTION: A light source device includes a light emitting part including the light source, a light projection glass where light radiated from the light source enters, a cylindrical holding part in which the light projection glass is provided in the vicinity of a tip, and a body part provided on the root side of the holding part, and the body part is provided at a tower. The holding part includes a first recess part provided at the tip, and a through-hole which is provided along the longer direction, and in which one end opens at the first recess part. The light projection glass is provided inside the first recess part. When viewed along the longer direction of the holding part, the first recess part is larger than the through-hole.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a light source device and an aviation obstruction light.

Background Art

[0002] Patent Document 1 discloses an attachment lifting device for attaching an aviation obstruction light to a tower having a cylindrical structure surrounded by walls, and a method for attaching an aviation obstruction light using the lifting device. In the invention described in Patent Document 1, a hole having a predetermined diameter through which the end of the attachment member of the aviation obstruction light can be inserted is provided in the tower, and a pipe with a pulley attached to its tip is stretched outside the tower through the hole, and a pipe extension and retraction mechanism is provided that can fix the pipe in a state where it can be freely extended and at least extended. A winch for winding up and down a rope with an aviation obstruction light attached to one end is provided inside the tower.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the invention described in Patent Document 1, since the purpose is to enable the lifting and attachment of an aviation obstruction light with a simple operation, the structure of the aviation obstruction light is complicated. If the structure is complicated, it takes time and effort in manufacturing, and the manufacturing cost has to be increased. In addition, due to an increase in the number of parts and complication of the part shapes, there is a risk of an increase in the occurrence of defects. In particular, for aviation obstruction lights attached to towers and the like, since inspection and replacement work are time-consuming, there is a desire to simplify the structure and reduce defects as much as possible.

[0005] The present invention has been made in view of such circumstances, and an object thereof is to provide a light source device and an aviation obstruction light with a simplified structure.

Means for Solving the Problems

[0006] In order to solve the above problems, the light source device according to the present invention includes, for example, a light emitting unit including a light source, a light projecting glass into which the light emitted from the light source is incident, a cylindrical holding unit provided with the light projecting glass near the tip, and a main body unit provided on the base side of the holding unit. The light source device is provided on a tower using a first mounting portion of the main body unit, wherein the holding unit has a first recess provided at the tip and a through hole provided along the longitudinal direction and having one end opening into the first recess. The light projecting glass is provided inside the first recess, and the tip projects from the tip of the holding unit. When viewed along the longitudinal direction of the holding unit, the first recess is larger than the through hole.

[0007] In order to solve the above problems, the aviation obstruction light according to the present invention includes, for example, a light emitting unit including a light source, a light projecting glass into which the light emitted from the light source is incident, a cylindrical holding unit provided with the light projecting glass near the tip, and a main body unit provided on the base side of the holding unit. The aviation obstruction light is provided at a position other than the top of the tower using a first mounting portion of the main body unit, wherein the main body unit has a mounting portion for mounting the main body unit on the inner surface of the tower wall. The holding unit has a first recess provided at the tip and a through hole provided along the longitudinal direction and having one end opening into the first recess. The light projecting glass is fitted inside the first recess, and the tip projects from the tip of the holding unit. The holding unit is inserted into a hole provided in the wall so that the light projecting glass is located outside the wall. When viewed along the longitudinal direction of the holding unit, the first recess is larger than the through hole.

[0008] According to the light source device or the aviation obstruction light of the present invention, the light emitting unit and the plate glass may be provided in the main body unit and the cylindrical unit, and the structure can be simplified. Further, the plate glass may be simply provided in the first recess, and the manufacturing is easy. Further, a mold is not required for manufacturing the light projecting glass, and the manufacturing cost is low.

[0009] The tip of the light-projecting glass is plate-shaped, and the plane at the tip may protrude from the tip of the holding portion. As a result, since the periphery of the plane (surface) of the tip of the light-projecting glass is not surrounded by the holding portion, the light spreading obliquely upward from the surface is not blocked by the holding portion, and a wide range can be irradiated with light. Therefore, the standard of a low-intensity aviation obstruction light can be satisfied. Further, the light-projecting glass is plate-shaped, and the light-projecting glass is easy to process.

[0010] The edge of the light-projecting glass on the side protruding from the tip of the holding portion may have a C chamfer or an R chamfer on the periphery. Thereby, the amount of light emitted obliquely upward from the light-projecting glass can be increased by simple processing.

[0011] A second recess may be formed at a position overlapping the through hole when viewed along the longitudinal direction of the holding portion on the surface of the light-projecting glass that abuts against the bottom surface of the first recess. Thereby, the amount of light emitted obliquely upward from the light-projecting glass can be increased. Further, since light is likely to be emitted obliquely upward from the light-projecting glass, even if the plane (surface) of the tip of the light-projecting glass does not protrude from the tip of the holding portion and the periphery of the surface is surrounded by the holding portion, the standard of a low-intensity aviation obstruction light can be satisfied.

[0012] The holding portion has a central axis substantially along the horizontal direction, and the light-projecting glass has a spherical segment-shaped tip portion protruding from the tip of the holding portion, and has a tip portion that protrudes toward the side opposite to the holding portion. The tip surface, which is the surface of the tip portion, has a spherical crown portion and a part of a conical surface formed by notching the spherical segment in a band shape, and a first conical surface portion substantially along the horizontal direction. The first conical surface portion is provided near the upper end of the light-projecting glass. A third recess is formed at a position overlapping the through hole when viewed along the longitudinal direction of the holding portion on the bottom surface of the light-projecting glass that abuts against the bottom surface of the first recess. The third recess has a first plane substantially along the horizontal direction, and the light irradiated from the light source may be refracted by the first plane and then refracted by the conical surface. Thereby, light can be stably irradiated upward in the vertical direction from the light-projecting glass.

[0013] When the light guide glass is cut along a cutting plane passing through the light source and along the vertical direction and also passing through a first axis along the vertical direction, within a predetermined range, even if the cutting plane is rotated about the first axis, the shapes of the tip surface and the third recess may not change. Thereby, light can be irradiated in the same manner within a predetermined range.

[0014] The third recess has a strip-shaped curved surface parallel to the first conical surface portion, and the curved surface may be convex toward the bottom surface of the first recess when cut along a plane passing through the light source and along the vertical direction. Thereby, the light irradiated from the light source can be condensed more than in the case of only the spherical cap portion, and the amount of light irradiated forward can be increased.

[0015] The tip surface has a strip-shaped second conical surface portion connecting the spherical cap portion and the first conical surface portion, the third recess has a strip-shaped connecting portion, and the light irradiated from the light source is refracted at the connecting portion and then refracted at the second conical surface portion. When cut along a plane passing through the light source and along the vertical direction, the connecting portion is curved so as to be convex toward the second conical surface portion, and the second conical surface portion may be curved so as to be convex toward the connecting portion or may be linear. Thereby, a concave lens is formed, and the light irradiated from the second conical surface portion can be widely diffused.

[0016] The light source mounting portion includes a rod-shaped portion provided with the light emitting portion at the tip and a second mounting portion provided with the rod-shaped portion. The second mounting portion is provided on the main body portion. A hole is formed in the main body portion, and the base of the holding portion is provided in the hole. The rod-shaped portion is inserted into the through hole from the main body portion side, and the light source and the light guide glass may be adjacent to each other. Thereby, the light source and the light guide glass can be brought closer to each other, and the use efficiency of the light beam can be increased. Also, the replacement of the light source (light emitting portion and light source mounting portion) is easy, and the maintainability is high.

[0017] It is provided with a rod-shaped light guide member provided in the through hole of the holding portion, the light emitting portion is provided in the main body portion, the light guide member is provided between the light source and the light projecting glass, and light irradiated from the light source may enter the light projecting glass through the light guide member. Thereby, it is easy to replace the light source (light emitting portion), and the maintainability is high. In addition, since only the light emitting portion needs to be replaced (the light guide member does not need to be replaced), the maintenance cost can be suppressed.

Effects of the Invention

[0018] According to the present invention, it is possible to provide a light source device and an aviation obstruction light that have a simple configuration and are easy to attach.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Embodiments for Carrying Out the Invention

[0020] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The light source device and the aviation obstruction light of the present invention are provided on a tower. In the present invention, the tower means a general high-standing building, for example, a tower provided in a windmill, a bridge, a radio tower, or a chimney. Hereinafter, the light source device and the aviation obstruction light of the present invention will be described by taking, as an example, an aviation obstruction light provided at a position other than the top of the tower of the windmill, for example, in the middle stage. However, the aviation obstruction light is an example of the light source device, and the light source device is not limited to the aviation obstruction light. In addition, a light source device other than the aviation obstruction light can also be provided at a position other than the middle stage of the tower, for example, at the top of the tower.

[0021] <The First Embodiment> FIG. 1 is a perspective view schematically showing a wind turbine 100 provided with an aviation obstruction light 1 according to a first embodiment of the present invention. The wind turbine 100 mainly includes a tower 101, a nacelle 102 provided at the top of the tower, and blades 103 provided on the nacelle 102. Inside the nacelle 102, a main shaft (not shown) to which the blades 103 are connected, a generator (not shown), etc. are provided.

[0022] The aviation obstruction light 1 is provided in the middle section (for example, the intermediate position in the height direction) of the tower 101. A plurality of aviation obstruction lights 1 are provided at a plurality of locations in the circumferential direction, and the plurality of aviation obstruction lights 1 irradiate light over the entire circumference (360 degrees). In the present embodiment, four aviation obstruction lights 1 are provided on the tower 101.

[0023] FIG. 2 is a perspective view schematically showing the aviation obstruction light 1. FIG. 3 is a cross-sectional view schematically showing the aviation obstruction light 1. FIG. 3 shows a state in which the aviation obstruction light 1 is cut along the plane P of FIG. 2. In FIG. 3, the lower side of the paper is the inside of the tower 101, and the upper side of the paper is the outside of the tower 101. Further, FIG. 3 partially omits the hatching showing the cross section.

[0024] The aviation obstruction light 1 mainly includes a main body portion 10, a holding portion 20, a light emitting portion 30, and a projection glass 40.

[0025] The main body portion 10 is a box-shaped member with a hollow inside and has a mounting portion 11 for mounting on the tower 101. Electrical components, a substrate, etc. are provided inside the main body portion 10. Note that the shape of the main body portion 10 is not limited to the shape shown in the figure.

[0026] The main body part 10 has an attachment part 11 for attaching to the tower 101. The attachment part 11 is provided on the inner surface 101b of the wall 101a of the tower 101. An anchor bolt (not shown) is inserted into the hole 11a provided in the attachment part 11, and by driving the anchor bolt into the wall 101a, the main body part 10 (i.e., the aviation obstruction light 1) is fixed to the wall 101a (i.e., the tower 101). Further, a hole 101c is provided in the wall 101a, and the holding part 20 is inserted into the hole 101c. When the holding part 20 is inserted into the hole 101c and the main body part 10 is fixed to the wall 101a, the light projection glass 40 is arranged outside the wall 101a.

[0027] The holding part 20 is a cylindrical member. The base side of the holding part 20 is provided on the main body part 10. For example, a hole 12 is formed in the main body part 10, and the base of the holding part 20 is provided inside the hole 12. The holding part 20 has a cylindrical wall 21, and a through hole 22 is formed inside the wall 21. The through hole 22 is along the longitudinal direction of the holding part 20 (wall 21). Further, a recess 23 is formed at the tip of the holding part 20. In the present invention, the portion at the end farthest from the main body part 10 is referred to as the tip of the holding part 20.

[0028] When viewed along the longitudinal direction of the holding part 20 (along the axis ax), the recess 23 is larger than the through hole 22. In the present embodiment, the holding part 20 (wall 21) is cylindrical, and when viewed along the axis ax, the through hole 22 and the recess 23 are circular, and the diameter of the recess 23 is larger than the diameter of the through hole 22. However, the holding part 20 is not limited to a cylindrical shape, and for example, it may be a square tube shape. In this case, when viewed along the axis ax, the through hole 22 and the recess 23 may be rectangular.

[0029] The light emitting part 30 mainly has a light source 31 and a substrate 32 on which the light source 31 is provided. The light source 31 is, for example, an LED, but is not limited to an LED.

[0030] The light-projecting glass 40 is a plate-shaped glass, and the light irradiated from the light-emitting part 30 (light source 31) is incident thereon. The light-projecting glass 40 is provided near the tip of the holding part 20. For example, the light-projecting glass 40 is provided inside a recess 23 formed at the tip of the holding part 20. In the present embodiment, the recess 23 has a cylindrical shape, and the light-projecting glass 40 has a disc shape. The plane (surface 40b) at the tip of the light-projecting glass 40 protrudes from the tip 20a of the holding part 20.

[0031] FIG. 4 is a perspective view schematically showing the vicinity of the tip of the holding part 20. In the present embodiment, the light-projecting glass 40 is provided in the recess 23 with a gap of about several millimeters between the light-projecting glass 40 and the recess 23. Further, the light-projecting glass 40 and the recess 23 are filled with an adhesive. In FIG. 4, illustration of the adhesive filled between the light-projecting glass 40 and the recess 23 is omitted.

[0032] Returning to the description of FIG. 3. The light-emitting part 30 is provided in the light source mounting part 50. The light source mounting part 50 has a rod-shaped part 51 with the light-emitting part 30 provided at its tip, and a mounting part 52 (corresponding to the second mounting part of the present invention) on which the rod-shaped part 51 is provided. In the present invention, the portion at the end farthest from the mounting part 52 is referred to as the tip of the rod-shaped part 51.

[0033] The rod-shaped part 51 is inserted into the through-hole 22 through the hole 12. Further, the mounting part 52 is provided on the main body part 10. That is, the light-emitting part 30, together with the rod-shaped part 51, is inserted into the through-hole 22 from the side of the main body part 10, and is fixed inside the through-hole 22 by fixing the mounting part 52 to the main body part 10.

[0034] The light-emitting part 30 provided inside the through-hole 22 and the light-projecting glass 40 are adjacent to each other. When viewed along the axis ax, since the recess 23 is larger than the through-hole 22, substantially all of the light irradiated from the light-emitting part 30 (light source 31) is incident on the light-projecting glass 40.

[0035] FIG. 5 is a diagram schematically showing the direction of light irradiated from the light projecting glass 40 to the outside of the aviation obstruction light 1. The aviation obstruction light 1 is provided on the windmill 100 with the axis ax substantially along the horizontal direction, and the direction substantially orthogonal to the axis ax (the vertical and horizontal directions in the drawing of FIG. 5) is the vertical direction.

[0036] The light source 31 is a point light source, and the light irradiated from the light source 31 spreads in a spherical shape. A part of the light irradiated while spreading from the light source 31 enters the light projecting glass 40 and is refracted by the back surface 40a and the front surface 40b, so that the light spreads further. As a result, the light is irradiated from the light projecting glass 40 in a state of spreading not only in the horizontal direction (the direction along the axis ax) but also obliquely upward and obliquely downward.

[0037] Since the plane (front surface 40b) at the tip of the light projecting glass 40 protrudes from the tip 20a of the holding portion 20 (wall 21), the front surface 40b from which the light exits is located outside the wall 21, and the periphery of the front surface 40b is not surrounded by the wall 21. Therefore, the light spreading obliquely upward and obliquely downward from the front surface 40b is not blocked by the wall 21, and a wide range can be irradiated with light.

[0038] In addition, when the aviation obstruction light 1 is a low-intensity aviation obstruction light, legally, it is necessary to irradiate light with a luminous intensity of 32 cd (candela) or more in the direction of 6 to 10° obliquely upward. By arranging the front surface 40b outside the tip 20a of the wall 21 so that the periphery of the front surface 40b is not surrounded by the wall 21, this standard can be satisfied.

[0039] According to the present embodiment, the holding portion 20 protrudes from the main body portion 10, and an optical component may be provided in the holding portion 20, so that an aviation obstruction light with a simple configuration can be obtained. Further, the holding portion 20 can be inserted into the hole 101c provided in the wall 101a of the windmill 100, and the mounting portion 11 can be installed on the inner surface 101b of the wall 101a with an anchor bolt or the like, and the aviation obstruction light 1 can be easily mounted and replaced.

[0040] Further, according to the present embodiment, since the light projecting glass 40 is plate-shaped and the back surface 40a and the front surface 40b are flat surfaces, it is only necessary to cut the plate glass, and the processing of the light projecting glass 40 is easy. Further, since a mold is not required for manufacturing the light projecting glass 40 (for example, a mold is required to make a convex lens light projecting glass), and polishing of the surface is not required, the cost is low. Further, since it is only necessary to put the light projecting glass 40 into the recess 23, an aviation obstruction light with a simple configuration can be obtained.

[0041] Further, according to the present embodiment, since the light source 31 and the light projecting glass 40 are adjacent to each other, the use efficiency of the light beam can be increased.

[0042] Further, according to the present embodiment, since the light emitting portion 30 is provided in the light source mounting portion 50 provided in the main body portion 10, the light emitting portion 30 and the light source mounting portion 50 can be removed from the inside of the tower 101. Although it is necessary to replace the light source 31 for maintenance when a certain period has elapsed, in the aviation obstruction light 1, the light source 31, that is, the light emitting portion 30 and the light source mounting portion 50 can be easily replaced, and the maintainability is high.

[0043] In the present embodiment, the light emitting portion 30 has one light source 31, but the number of light sources 31 is not limited to one. For example, a plurality of light sources 31 may be provided adjacent to each other. FIG. 6 is a diagram schematically showing an example of a light emitting portion 30A having a plurality of light sources 31. In the light emitting portion 30A, nine light sources are two-dimensionally arranged (3 in the vertical direction × 3 in the horizontal direction).

[0044] Further, in the present embodiment, the light projecting glass 40 is plate-shaped and no recess or end face processing is performed, but the form of the light projecting glass 40 is not limited to this. FIGS. 7(A) and (B) are diagrams showing an outline of light projecting glasses 40A and 40B according to a modified example. As in the light projecting glass 40A shown in FIG. 7(A), chamfering (C surface 40c) may be performed on the periphery of the end portion (front surface 40b) on the side protruding from the tip of the holding portion 20. Further, as in the light projecting glass 40B shown in FIG. 7(B), rounding (R surface 40d) may be performed on the periphery of the end portion (front surface 40b) on the side protruding from the tip of the holding portion 20.

[0045] Since the C surface 40c or the R surface 40d is formed on the periphery of the light-emitting surface 40b, the light emitted from the light-emitting glasses 40A and 40B is more likely to spread radially than the light-emitting glass 40. As a result, the amount of light emitted obliquely upward from the light-emitting surface 40b increases, and the standard of the low-intensity aviation obstruction light can be easily satisfied. In addition, the processing of the C surface 40c and the R surface 40d is easy and does not require much manufacturing effort.

[0046] Figs. 8(A), (B), and (C) are diagrams showing the outlines of the light-emitting glasses 40C, 40D, and 40E according to the modified examples. As in the light-emitting glass 40C shown in Fig. 8(A), a concave portion 40e may be formed on the surface (rear surface 40a) in contact with the bottom surface of the concave portion 23. Further, as in the light-emitting glass 40D shown in Fig. 8(B), a concave portion 40e is formed on the rear surface 40a, and a C surface 40c (or an R surface 40d) may be formed on the periphery of the light-emitting surface 40b. The concave portion 40e is a spherical concave surface, and the light-emitting glasses 40C and 40D function as plano-concave lenses. Note that the concave portion 40e is not limited to a spherical shape, and may be an aspherical concave portion formed by combining curved surfaces such as a paraboloid, a hyperboloid, and an ellipsoid.

[0047] Further, as in the light-emitting glass 40E shown in Fig. 8(C), a concave portion 40f may be formed on the rear surface 40a, and a C surface 40c (or an R surface 40d) may be formed on the periphery of the light-emitting surface 40b. The concave portion 40f is, for example, a cylindrical cavity. Note that the C surface 40c and the R surface 40d are not essential.

[0048] The concave portions 40e and 40f are formed at positions overlapping the through hole 22 when viewed along the longitudinal direction of the holding portion 20 (along the axis ax). Since the concave portion 40e or the concave portion 40f is formed on the rear surface 40a, the light emitted from the light-emitting glasses 40C, 40D, and 40E is more likely to spread radially than the light-emitting glass 40. As a result, the amount of light emitted obliquely upward from the light-emitting surface 40b increases, and the standard of the low-intensity aviation obstruction light can be easily satisfied.

[0049] Further, the light-projecting glass 40 is compatible with the light-projecting glasses 40A, 40B, 40C, 40D, and 40E. Therefore, desired light-projecting glasses 40, 40A, 40B, 40C, 40D, and 40E with different light distribution characteristics can be used according to the specifications.

[0050] Also, in the present embodiment, the flat surface (surface 40b) at the tip of the light-projecting glass 40 protrudes from the tip 20a, and the periphery of the surface 40b is not surrounded by the wall 21. However, the arrangement of the light-projecting glass 40 is not limited to this. For example, when the aviation obstruction light 1 is used as a light source device instead of an aviation obstruction light, the light-projecting glass 40 may not protrude from the tip 20a.

[0051] Also, in the present embodiment, the aviation obstruction light 1 is provided on the inner surface 101b of the wall 101a of the tower 101. However, the attachment of the aviation obstruction light 1 (light source device) is not limited to this. For example, the light source device may be provided on the outer surface of the tower wall.

[0052] <Second Embodiment> In the aviation obstruction light 1 according to the first embodiment of the present invention, the light-emitting portion 30 provided on the rod-shaped portion 51 of the light source attachment portion 50 and the light-projecting glass 40 are adjacent to each other. However, the arrangement of the light-emitting portion 30 is not limited to this. Hereinafter, the aviation obstruction light 2 according to the second embodiment will be described. The same parts as those of the aviation obstruction light 1 according to the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0053] FIG. 9 is a cross-sectional view showing an outline of the aviation obstruction light 2. Note that FIG. 9 partially omits the hatching indicating the cross section. The aviation obstruction light 2 mainly includes a main body portion 10, a holding portion 20, a light-emitting portion 30B, a light-projecting glass 40, and a light guide member 60.

[0054] The light emitting unit 30B mainly includes a light source 31, a substrate 32 on which the light source 31 is provided, and a mounting portion 33 to which the substrate 32 is attached. The mounting portion 33 is provided on the main body portion 10 such that the light source 31 faces the holding portion 20. Thereby, the light source 31 is disposed on the axis ax. Note that the light source 31 may be slightly deviated from the axis ax, and it is sufficient that the through hole 22 and the light source 31 overlap when viewed along the axis ax.

[0055] A light guide member 60 is provided in the through hole 22 of the holding portion 20. The light guide member 60 is rod-shaped and is formed of a transparent material (such as resin or glass) that allows light to pass through. By inserting the light guide member 60 into the inside of the through hole 22, the light guide member 60 is provided between the light emitting unit 30A (light source 31) and the projection glass 40. When resin is used for the light guide member 60, weight reduction is possible and the cost is low. Further, when glass is used for the light guide member 60, replacement is not required and the maintainability is excellent.

[0056] FIG. 10 is a diagram schematically showing the direction of light irradiated from the light emitting unit 30B and irradiated from the projection glass 40 to the outside of the aviation obstruction light 2. The aviation obstruction light 2 is provided on the windmill 100 such that the axis ax is substantially horizontal with the horizontal direction.

[0057] The light source 31 is a point light source, and the light irradiated from the light source 31 spreads in a spherical shape. The light irradiated from the light source 31 enters the light guide member 60 and travels toward the projection glass 40 while reflecting inside the light guide member 60. The light irradiated from the light source 31 enters the projection glass 40 through the light guide member 60.

[0058] The light incident on the projection glass 40 is irradiated from the projection glass 40 in a state of spreading not only in the horizontal direction (the direction along the axis ax) but also obliquely upward and obliquely downward. Since the tip (surface 40b) of the projection glass 40 protrudes from the tip 20a of the holding portion 20 (wall 21) and the periphery of the projection glass 40 is not surrounded by the wall 21, the light spreading obliquely upward and obliquely downward from the surface 40b is not blocked by the wall 21, and light can be irradiated over a wide range.

[0059] In addition, when the aviation obstruction light 2 is a low-intensity aviation obstruction light, legally, it is necessary to irradiate light with a luminous intensity of 32 cd (candela) or more in the obliquely upward 6 to 10° direction. By protruding the tip of the projection glass 40 from the tip of the wall 21, this standard can be satisfied.

[0060] According to the present embodiment, the holding portion 20 can be inserted into the hole 101c provided in the wall 101a of the windmill 100, and the attachment portion 11 can be installed on the inner surface 101b of the wall 101a with an anchor bolt or the like, so that the aviation obstruction light 2 can be easily installed and replaced.

[0061] Further, according to the present embodiment, since the light emitting portion 30B is provided in the main body portion 10, the light emitting portion 30B can be easily removed from the inside of the tower 101. When it is necessary to replace the light source 31 for maintenance after a certain period of time, in the aviation obstruction light 2, the light source 31, that is, the light emitting portion 30B can be easily replaced, and the maintainability is high. In addition, since only the light emitting portion 30B needs to be replaced (the light guide member 60 does not need to be replaced), the maintenance cost can be suppressed.

[0062] <The Third Embodiment> In the aviation obstruction light 1 according to the first embodiment of the present invention, the disk-shaped projection glass 40 was provided, but the shape of the projection glass is not limited to this. Hereinafter, the aviation obstruction light 3 according to the third embodiment will be described. Note that the same parts as those of the aviation obstruction lights 1 and 2 according to the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0063] FIG. 11 is a diagram showing an outline of the aviation obstruction light 3, (A) is a partial perspective view, and (B) is a view taken in the direction of arrow A of (A). In FIG. 11(A), the vicinity of the tip of the holding portion 20 is schematically shown. In FIG. 11(B), the illustration of the holding portion 20 is omitted. The aviation obstruction light 3 mainly includes a main body portion 10 (not shown in FIG. 11), a holding portion 20, a light emitting portion 30 (not shown in FIG. 11(A)), a projection glass 40F, and a light source attachment portion 50 (not shown in FIG. 11).

[0064] The light-projecting glass 40F is provided near the tip of the holding part 20, here inside the recess 23. The tip of the light-projecting glass 40F protrudes from the tip 20a of the holding part 20. The tip surface 41 protruding from the tip 20a of the light-projecting glass 40F is a convex surface with the central part protruding toward the side opposite to the holding part 20. The light-projecting glass 40F will be described in detail later.

[0065] The light-projecting glass 40F is provided in the recess 23 with a gap of about several millimeters between the light-projecting glass 40F and the recess 23. Further, the light-projecting glass 40F and the recess 23 are filled with an adhesive (not shown).

[0066] Figs. 12 and 13 are diagrams schematically showing the direction of light irradiated from the light-projecting glass 40F to the outside of the aviation obstruction light 3. Fig. 12 is a cross-sectional view (the B-B cross-sectional view in Fig. 11(B)) when the holding part 20, the light-emitting part 30, and the light-projecting glass 40 are cut along the cutting plane P1 in Fig. 11, and Fig. 13 is a cross-sectional view (the C-C cross-sectional view in Fig. 11(B)) when the holding part 20, the light-emitting part 30, and the light-projecting glass 40 are cut along the cutting plane P2 in Fig. 11. In Figs. 12 and 13, the path of light is indicated by a dotted arrow.

[0067] The aviation obstruction light 3 is provided on the windmill 100 (see Fig. 1) with the axis ax substantially along the horizontal direction. The vertical direction in the plane of Fig. 12 is the vertical direction, and the upper side on the plane of the drawing is the upper side in the vertical direction. The plane of Fig. 13 is along the horizontal direction.

[0068] The light-emitting part 30 provided inside the through-hole 22 is adjacent to the light-projecting glass 40F. In the present embodiment, since the light-emitting part 30 (light source 31) is provided inside the recess 44 (described in detail later) formed in the light-projecting glass 40F, substantially all the light irradiated from the light source 31 enters the light-projecting glass 40F. The recess 44 is formed at a position overlapping the through-hole 22 when viewed along the longitudinal direction of the holding part 20. Note that it is not essential to provide the light source 31 inside the recess 44.

[0069] The light source 31 is a point light source, and the light emitted from the light source 31 spreads in a spherical shape. A part of the light emitted while spreading from the light source 31 enters the projection glass 40F, and the light is irradiated from the projection glass 40F in a state of spreading not only in the horizontal direction but also in the obliquely upper and lower directions. Also, light is irradiated vertically upward from the projection glass 40F.

[0070] The projection glass 40F is characterized in that light can be irradiated vertically upward. Here, the projection glass 40F will be described in detail. Fig. 14 is a perspective view of the projection glass 40F, (A) is a view seen from the tip surface 41 side, and (B) is a view seen from the side opposite to the tip surface 41 (rear side). Fig. 15(A) is a side view of the projection glass 40F, and Fig. 15(B) is a rear view of the projection glass 40F.

[0071] The projection glass 40F has a shape in which a spherical segment-shaped tip portion 40h is provided at the tip side of a cylindrical columnar portion 40g. The surface of the tip portion 40h is the tip surface 41. The side where the tip portion 40h of the columnar portion 40g is not provided is the bottom surface 43.

[0072] In this embodiment, the columnar portion 40g has a taper, and the taper angle is about 10° to 20°, but the columnar portion 40g may not have a taper. Also, the taper angle is not limited to this.

[0073] The tip surface 41, which is the surface of the tip portion 40h, has a spherical crown portion 41a, conical surfaces 41b, 41c, and an end surface 41d. The conical surfaces 41b, 41c and the end surface 41d are formed by notching the tip portion 40h. The conical surfaces 41b, 41c are part of a conical surface formed by notching the spherical segment in a band shape. The conical surfaces 41b, 41c are respectively provided substantially along the horizontal direction. The end surface 41d is formed at both ends of the conical surfaces 41b, 41c by forming the conical surfaces 41b, 41c.

[0074] The conical surface portion 41b (corresponding to the first conical surface portion of the present invention) is provided near the upper end of the light-projecting glass 40F. The conical surface portion 41c (corresponding to the first conical surface portion of the present invention) connects the conical surface portion 41b and the spherical crown portion 41a. The inclination of the conical surface portion 41b with respect to the horizontal direction is steeper than the inclination of the conical surface portion 41c with respect to the horizontal direction.

[0075] A recess 44 (corresponding to the third recess of the present invention) is formed in the light-projecting glass 40F. One end of the recess 44 opens to the bottom surface 43. In other words, the bottom surface 43 is provided with the recess 44 facing the tip surface 41. The recess 44 is a hollowing inside the light-projecting glass 40F, and the light-emitting portion 30 is disposed in the internal space formed by the recess 44 (see FIGS. 12, 13, etc.).

[0076] Further, a recess 45 is formed in the recess 44. The recess 45 is provided, for example, so as not to interfere with a fixing member (not shown) or the like, and is not essential.

[0077] FIG. 16 is a cross-sectional view of the light-projecting glass 40F. (A) is a cross-sectional view taken along line D-D of FIG. 15(B) (cross-sectional view at the cutting plane P1), and (B) is a cross-sectional view taken along line E-E of FIG. 15(B) (cross-sectional view at the cutting plane P2). The recess 44 is formed by combining a flat surface 44a (corresponding to the first flat surface of the present invention), 44b, and a curved surface (curved surface 44c, connecting portions 44d, 44e, side surface portion 44f, and bottom surface 44g).

[0078] The flat surfaces 44a and 44b are flat surfaces provided at the upper end and the lower end of the recess 44, respectively. The flat surface 44a is provided at the upper end of the recess 44, and the flat surface 44b is provided at the lower end of the recess 44. The flat surfaces 44a and 44b are substantially along the horizontal direction (or the conical surface portions 41b and 41c).

[0079] In the present invention, "substantially along the horizontal direction (or the tapered surface portions 41b and 41c)" is a concept that includes not only the case of being along the horizontal direction but also the case of being inclined by about ±10° to ±13° or less with respect to the horizontal direction. For example, in the present embodiment, in order to facilitate manufacturing, the planes 44a and 44b are each inclined by 10° with respect to the horizontal direction in a direction in which the distance between the plane 44a and the plane 44b increases as approaching the bottom surface 43, but the planes 44a and 44b may be along the horizontal direction.

[0080] The curved surface 44c is strip-shaped and substantially along the horizontal direction. In other words, the curved surface 44c and the tapered surface portions 41b and 41c are arranged in parallel. When the curved surface 44c is cut by a cut surface P1 (a surface passing through the light source 31 and along the vertical direction), it is convex toward the bottom surface 43 (the bottom surface of the concave portion 23a). The radius of curvature R2 of the curved surface 44c is larger than the radius of curvature R1 of the spherical crown portion 41a.

[0081] Note that it is not essential to make the radius of curvature R2 larger than the radius of curvature R1. However, in order to widen the internal space of the light projection glass 40F and arrange the light source 31 and its mounting components or the like in the internal space, it is desirable to make the radius of curvature R2 larger than the radius of curvature R1.

[0082] The connecting portions 44d and 44e are strip-shaped and substantially along the horizontal direction. In other words, the connecting portions 44d and 44e and the tapered surface portions 41b and 41c are arranged in parallel. The connecting portion 44d connects the plane 44a and the curved surface 44c, and the connecting portion 44e connects the plane 44b and the curved surface 44c. The connecting portions 44d and 44e are each curved so as to be convex toward the tip surface 41.

[0083] Further, the concave portion 44 has a columnar or frustum-shaped hole, and this hole has a side surface portion 44f and a bottom surface 44g. Note that the shapes of the side surface portion 44f and the bottom surface 44g are not limited to this. Also, this hole is not essential.

[0084] FIG. 17 is a cross-sectional view when the light projection glass 40F is cut along a cutting plane P3 to P8 (see FIG. 16(B)) that passes through the light source 31 and along an axis ax2 (corresponding to the first axis of the present invention, see FIG. 16) along the vertical direction.

[0085] The cutting planes P3 to P8 are cutting planes obtained by rotating the cutting plane P1 about the axis ax2. The cutting plane P3 is a plane obtained by rotating the cutting plane P1 by 10°, the cutting plane P4 is a plane obtained by rotating the cutting plane P1 by 20°, the cutting plane P5 is a plane obtained by rotating the cutting plane P1 by 30°, the cutting plane P6 is a plane obtained by rotating the cutting plane P1 by 40°, the cutting plane P7 is a plane obtained by rotating the cutting plane P1 by 50°, and the cutting plane P8 is a plane obtained by rotating the cutting plane P1 by 60°. In FIG. 17, (A) is a cross-sectional view of the cutting plane P3, (B) is a cross-sectional view of the cutting plane P4, (C) is a cross-sectional view of the cutting plane P5, (D) is a cross-sectional view of the cutting plane P6, (E) is a cross-sectional view of the cutting plane P7, and (F) is a cross-sectional view of the cutting plane P8. As shown in FIGS. 16(A) and 17, when the light projection glass 40F is cut at the cutting planes P1, P3 to P8, the cross-sectional shapes of the tip surface 41, the flat surfaces 44a, 44b, the curved surface 44c, and the connecting portions 44d, 44e do not change and are the same.

[0086] Returning to the description of FIGS. 12 and 13. The light irradiated spherically from the light source 31 enters the light projection glass 40F from the concave portion 44. Among the concave portion 44, the light incident on the flat surfaces 44a, 44b, the curved surface 44c, and the connecting portions 44d, 44e is irradiated from the light projection glass 40F.

[0087] As shown in FIG. 12, the light incident on the flat surface 44a is first refracted by the flat surface 44a and then refracted by the conical surface portion 41b, and is irradiated upward in the vertical direction from the light projection glass 40F. In other words, the flat surface 44a and the conical surface portion 41b refract the light so that the light irradiated from the light source 31 becomes upward in the vertical direction. When the aviation obstruction light 1 is a low-intensity aviation obstruction light, legally, it is necessary to irradiate light upward in the vertical direction. Therefore, by providing the flat surface 44a and the conical surface portion 41b on the light projection glass 40F, light can be stably irradiated upward in the vertical direction from the light projection glass 40F.

[0088] The light irradiated spherically from the light source 31 and incident on the curved surface 44c is first refracted by the curved surface 44c, and then refracted by the spherical crown portion 41a, and is irradiated from the projection glass 40F. Since a convex lens is formed by the spherical crown portion 41a and the curved surface 44c, the light irradiated from the light source 31 is condensed and irradiated forward.

[0089] The light incident from the light source 31 on the connecting portion 44d is first refracted by the connecting portion 44d, and then refracted by the conical surface portion 41c, and is irradiated from the projection glass 40F. Since a concave lens is formed by the conical surface portion 41c and the connecting portion 44d, the light irradiated from the light source 31 is diffused and irradiated forward. In particular, by forming the conical surface portion 41c and the connecting portion 44d in the shape of a concave lens, the light irradiated from the conical surface portion 41c is diffused between the light irradiated from the spherical crown portion 41a and the light irradiated from the conical surface portion 41b, and the light can be spread over the entire area between the axis ax and the upper side in the vertical direction.

[0090] Also, the light incident from the light source 31 on the plane 44b and the connecting portion 44e is first refracted by the plane 44b and the connecting portion 44e, respectively, and then refracted by the spherical crown portion 41a, and is irradiated from the projection glass 40F.

[0091] In order to irradiate the upper side in the vertical direction, when viewed along the horizontal direction, the center L of the light irradiated from the projection glass 40F can be inclined upward from the axis ax. In the present embodiment, the angle θ1 formed by the center L of the light and the horizontal direction is 8°, but the angle θ1 is not limited to this.

[0092] Since the cross-sectional shape of the projection glass 40F does not change when the projection glass 40F is cut by the cut surfaces P1, P3 to P8 (see FIG. 17), as shown in FIG. 13, when viewed along the vertical direction, the light irradiated spherically from the light source 31 and incident on the planes 44a, 44b, the curved surface 44c, and the connecting portions 44d, 44e spreads evenly in the range of ±θ2 / 2 (the opening angle θ2 in the horizontal direction) or more centered on the axis ax. Therefore, the upper side in the vertical direction is irradiated with light in the range of the opening angle θ2 or more centered on the axis ax. In the present embodiment, the opening angle θ2 is 120°.

[0093] In this embodiment, since three light sources 31 are provided, it is desirable that the cross-sectional shapes of the tip surface 41, the flat surfaces 44a and 44b, the curved surface 44c, and the connecting portions 44d and 44e are constant so that the opening angle in the horizontal direction is θ2 or more for the light irradiated from any of the light sources 31.

[0094] According to this embodiment, similar to the aviation obstruction lights 1 and 2, the aviation obstruction light 3 can be made easy to install and replace. Further, the light source 31 can be easily removed and attached, and the maintainability is high.

[0095] Further, in this embodiment, since the light source 31 is provided inside the recess 44 of the projection glass 40F, the use efficiency of the luminous flux can be increased.

[0096] Further, in this embodiment, the light irradiated from the light source 31 is refracted by the flat surface 44a and then refracted by the conical surface portion 41b, so that the light can be stably irradiated upward in the vertical direction from the projection glass 40F. Further, by making the flat surface 44a and the conical surface portion 41b linear at the cut surface P1 etc., parallel light can be irradiated upward in the vertical direction without diffusing the light.

[0097] Further, in this embodiment, since a convex lens is formed by the spherical crown portion 41a and the curved surface 44c, the light irradiated from the light source 31 can be condensed and the amount of light irradiated forward can be increased. Further, since a concave lens is formed by the conical surface portion 41c and the connecting portion 44d, the widely diffused light can be irradiated from the conical surface portion 41c.

[0098] Further, in this embodiment, even if the cut surface P1 is rotated about the axis ax2 within a predetermined range (here, the opening angle θ2), the shapes of the tip surface 41, the flat surfaces 44a and 44b, the curved surface 44c, and the connecting portions 44d and 44e at the cut surface (cut surfaces P3 to P8 etc.) do not change, so that the light can be irradiated in the same manner within the predetermined range.

[0099] In addition, in the present embodiment, the conical surface portion 41c that connects the conical surface portion 41b and the spherical crown portion 41a is provided, but the conical surface portion 41c is not essential. For example, the conical surface portion 41b and the spherical crown portion 41a may be directly connected.

[0100] Further, in the present embodiment, when the light-projecting glass 40F is cut in a plane (cutting planes P1, P3 to P8) passing through the light source 31 and along the vertical direction, the conical surface portion 41c is linear. However, the shape of the conical surface portion 41c is not limited to this. For example, when the light-projecting glass 40F is cut in a plane passing through the light source 31 and along the vertical direction, the conical surface portion 41c may be curved so as to protrude toward the connecting portion 44d. Also, when the light-projecting glass 40F is cut in a plane (cutting planes P1, P3 to P8) passing through the light source 31 and along the vertical direction, the inclination of the conical surface portion 41b with respect to the horizontal direction is steeper than the inclination of the conical surface portion 41c with respect to the horizontal direction. However, the inclination of the conical surface portion 41c is not limited to this.

[0101] Also, in the present embodiment, when the light-projecting glass 40F is cut in a plane (cutting planes P1, P3 to P8) passing through the light source 31 and along the vertical direction, the curved surface 44c protrudes toward the bottom surface 43. However, the shape of the curved surface 44c is not limited to this. For example, the curved surface 44c may be linear in the cutting planes P1, P3 to P8.

[0102] Also, in the present embodiment, the radius of curvature R2 of the curved surface 44c is larger than the radius of curvature R1 of the spherical crown portion 41a. However, the radii of curvature R1 and R2 are not limited to this.

[0103] Further, in the present embodiment, within the range of the horizontal opening angle of 120° (predetermined range), even when the cutting plane P1 is rotated about the axis ax2, the light-projecting glass 40F is configured such that the shapes of the tip surface 41 and the concave portion 44 in the cutting plane (cutting planes P3 to P8, etc.) do not change. However, the predetermined range is not limited to this.

[0104] In addition, in this embodiment, the light-emitting unit 30 provided on the rod-shaped portion 51 was adjacent to the projection glass 40F as in the aviation obstruction light 1, but the arrangement of the light-emitting unit 30 is not limited to this. For example, similar to the aviation obstruction light 2, the light emitted from the light source 31 may enter the projection glass 40F through the light guide member 60.

[0105] Also, when the aviation obstruction light 3 of this embodiment is used as the light source device, the central axis ax of the holding portion 20 does not necessarily substantially follow the horizontal direction, and the conical surface portion 41b may be provided near the end of the projection glass 40F. However, in order to stably irradiate light in one direction, it is desirable to arrange the plane 44a substantially along the conical surface portion 41b.

[0106] As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within the scope not departing from the gist of the present invention are also included. In the present invention, "substantially" is a concept that includes not only the case of being exactly the same but also errors and deformations to the extent that identity is not lost. In the present invention, "nearby" means including a region within a certain range (which can be arbitrarily determined) near the reference position. For example, in the case of near the end, it is a concept indicating a region within a certain range near the end, which may or may not include the end.

Explanation of Reference Numerals

[0107] 1, 2, 3: Aviation obstruction lights 10: Main body portion 11: Mounting portion 11a, 12: Holes 20: Holding portion 20a: Tip 21: Wall 22: Through hole 23: Recess 30, 30A, 30B: Light-emitting units 31: Light source 32: Substrate 33: Mounting portion 40, 40A, 40B, 40C, 40D, 40E, 40F: Projection glasses 40a: Back surface 40b: Surface 40c: C surface 40d: R surface 40e, 40f: Concave part 40g: Columnar part 40h: Tip part 41: Tip surface 41a: Spherical crown part 41b, 41c: Conical surface part 41d: End surface 43: Bottom surface 44, 45: Concave part 44a, 44b: Flat surface 44c: Curved surface 44d, 44e: Connecting part 44f: Side surface part 44g: Bottom surface 50: Light source mounting part 51: Rod-shaped part 52: Mounting part 60: Light guide member 100: Windmill 101: Tower 101a: Wall 101b: Surface 101c: Hole 102: Nacelle 103: Blade

Claims

1. A light emitting unit including a light source; a light projection glass into which light emitted from the light source is incident; a cylindrical holder having the light-projecting glass disposed near a tip thereof; A main body portion provided on a base side of the holding portion; A light source device provided on a tower using a first mounting portion of the main body, The holding portion has a first recess provided at a tip end and a through hole provided along a longitudinal direction, one end of which opens into the first recess, the light projection glass is provided inside the first recess, and a tip end of the light projection glass protrudes from a tip end of the holding portion, When viewed along the longitudinal direction of the holding portion, the first recess is larger than the through hole. A light source device characterized by:

2. The light projection glass is plate-shaped, and a flat tip end of the light projection glass protrudes from the tip end of the holding portion.

2. The light source device according to claim 1.

3. the light projection glass has a spherical tip portion protruding from a tip of the holding portion and having a tip portion that is convex toward an opposite side to the holding portion, The tip surface, which is the surface of the tip portion, has a spherical crown portion and a first conical surface portion that is a part of a conical surface formed by cutting out the spherical crown portion in a band shape, the first conical surface portion is provided in the vicinity of an end of the light projection glass, a third recess is formed in a bottom surface of the light projection glass that is in contact with a bottom surface of the first recess, at a position overlapping with the through hole when viewed along the longitudinal direction of the holding portion, the third recess has a first plane parallel to the first conical surface portion, The light emitted from the light source is refracted at the first plane and then refracted at the conical surface.

2. The light source device according to claim 1.

4. A light emitting unit including a light source; a light projection glass into which light emitted from the light source is incident; a cylindrical holder having the light-projecting glass disposed near a tip thereof; A main body portion provided on a base side of the holding portion; An aviation obstruction light provided at a position other than the tower top by using a first mounting portion of the main body, The body portion has an attachment portion for attaching the body portion to an inner surface of the tower wall, The holding portion has a first recess provided at a tip end and a through hole provided along a longitudinal direction, one end of which opens into the first recess, the light projection glass is fitted inside the first recess and has a tip end protruding from a tip end of the holding portion, the holding portion is inserted into a hole provided in the wall so that the light projection glass is positioned outside the wall, When viewed along the longitudinal direction of the holding portion, the first recess is larger than the through hole. An aviation obstruction light characterized by the above features.

5. The light projection glass is plate-shaped, and a flat tip end of the light projection glass protrudes from the tip end of the holding portion.

5. An aviation obstruction light according to claim 4.

6. The end of the light projection glass on the side protruding from the tip of the holding portion is chamfered with a C-chamfer or R-chamfer on the periphery.

6. An aviation obstruction light according to claim 5.

7. A second recess is formed in a surface of the light projection glass that is in contact with a bottom surface of the first recess at a position that overlaps with the through hole when viewed along the longitudinal direction of the holding portion.

7. An aviation obstruction light according to claim 4, wherein the obstruction light is a

8. The holding portion has a central axis extending substantially along a horizontal direction, the light projection glass has a spherical tip portion protruding from a tip of the holding portion and having a tip portion that is convex toward an opposite side to the holding portion, The tip surface, which is the surface of the tip portion, has a spherical crown portion and a first conical surface portion that is a part of a conical surface formed by cutting out the spherical crown portion in a band shape and is approximately aligned along the horizontal direction, the first conical surface portion is provided in the vicinity of an upper end of the light projection glass, a third recess is formed in a bottom surface of the light projection glass that is in contact with a bottom surface of the first recess, at a position overlapping with the through hole when viewed along the longitudinal direction of the holding portion, The third recess has a first plane substantially aligned along a horizontal direction, The light emitted from the light source is refracted at the first plane and then refracted at the conical surface.

5. An aviation obstruction light according to claim 4.

9. When the light projection glass is cut along a cut surface that passes through the light source and along a first axis along the vertical direction, the shapes of the tip surface and the first flat surface do not change within a predetermined range even when the cut surface is rotated around the first axis.

9. An aviation obstruction light according to claim 8.

10. the third recess has a band-shaped curved surface parallel to the first conical surface portion, The curved surface is convex toward a bottom surface of the first recess when cut along a plane that passes through the light source and is aligned in a vertical direction.

10. An aviation obstruction light according to claim 8 or 9.

11. the tip surface has a band-shaped second conical surface portion connecting the spherical crown portion and the first conical surface portion, The third recess has a band-shaped connecting portion, The light emitted from the light source is refracted at the connecting portion and then refracted at the second conical surface portion, When cut along a plane that passes through the light source and is aligned in a vertical direction, the connecting portion is curved so as to be convex toward the second conical surface portion, and the second conical surface portion is curved so as to be convex toward the connecting portion or is linear.

11. An aviation obstruction light according to claim 8 .

12. a light source attachment part having a rod-shaped part at a tip of which the light emitting part is provided, and a second attachment part at which the rod-shaped part is provided; The second attachment portion is provided on the main body portion, The body portion has a hole formed therein, The hole is provided with a root of the holding portion, The rod-shaped portion is inserted into the through hole from the main body side, The light source and the projection glass are adjacent to each other.

12. An aviation obstruction light according to any one of claims 4 to 11.

13. a rod-shaped light guiding member provided in the through hole of the holding portion, The light emitting unit is provided in the main body, The light guide member is provided between the light source and the light projection glass, The light emitted from the light source is incident on the light projection glass via the light guide member.

12. An aviation obstruction light according to any one of claims 4 to 11.

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